1. General description and information D L 1.1
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- Randell Matthews
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1 Compact hydraulic power pack type HKL and HKLW For 1- and 3-phase mains Fan cooled, for continuous and intermittent service; single and dual circuit pumps Compact hydraulic power packs for vertical installation: HK 24 D -2 HK 3.. D -3 HK 4.. and HKF 4.. D -4 Flow Q max Pressure p max = ca. 22 lpm (14 rpm) = bar (Radial piston pump) = 0 bar (Gear pump) General description and information Terminal box with cable gland Mx1.5. Six pin terminal strip enables the customer to connect either in!-mode (standard) or /-mode. Additional terminal strip for optional float or temperature switch. Main connection pedestal with one (single circuit pump) or two pressure outlets (dual circuit pump) and return port. Prepared for the mounting of connection blocks for ongoing pressure and reflow pipes or with directly mounted directional valve banks (illustrated). Filler neck with screen filter 0.4 x Filling gauge with Max./min. - marking Bottom housing section with radial piston pump for pressure ranges up to bar or play compensated gear pump for pressure ranges up to 0 bar. Finned tubular tank with shrunk-in stator. This helps to conduct the generated heat from the winding to the cooling fins. Fan shroud with largely dimensioned fan wheel. The fan shroud directs the stream of air, which is created by the fan wheel, through the ribs and thereby ensures an intensive heat dissipation to the surroundings. These compact hydraulic power packs are therefore suitable for the VDE 05 operating modes S1 (continuous operation) in the range of the minal power as well as S6 (permanent running with idle sequences). Thereby approx. up to 1.8 of the m. power rating can be employed. S3 (intermittent service) is also possible. The cooling effect of the large finned surface is also very good at standstill of the motor. HAWE HYDRAULIK GMBH & CO. KG STREITFELDSTR MÜNCHEN D -3L Compact hydraulic power pack type HKL3 January 01-05
2 D -3L page 2 2. Type coding Order example: (Single circuit pump, see section 2.2.1) HKL 34 DT /1 - H 7,7 - A1/ /2V!/ Hz (Dual circuit pump, see section 2.2. HKLW 32 8T /1C- HZ 0,88/5,2 - NA31-AR//-WGZ4-1R-WG 1 + V Hz Connection block depending on pump versiong (If required in combination with directional valve bank, see sect. 5.5) Pump version: H... -Single circuit pump (Radial piston pump, see sect ) Z... -Single circuit pump (Gear pump, see sect ) HH... /... -Dual circuit pump Motor voltage Coding Operating voltage Power (kw) Rev. rating (rpm) HKL /2V Hz 1, /2V Hz 1,8 16 HKL /2V Hz 1, /2V Hz 1, HKLW 34 1 ) 1+ V Hz 1, V Hz 1, HKLW V Hz 1, V Hz 1, Connection pedestal turned to the left turned to the right Motor voltage (For available versions, see sect. 2.1) (Radial piston pump - Radial piston pump, see sect Table 3) HZ... /... -Dual circuit pump (Radial piston pump - Gear pump, see sect table 4) Fan shroud: coding -Sheet steel version C -Plastic version Position of the terminal box /1 Standard /2 Installation position, rotated by to the left (only with version H and Z) /3 Installation position, rotated by to the right (only with version H and Z) Additional functions (combinations are also possible) codingno additional functions (only type HKL) T Temperature switch (standard with type HKLW) D Float switch (NC-contact) Tank size coding Standard, filling volume approx. 3.7 l 8 Filling volume approx. 5.5 l Basic types, motor version HKL 34 3-phase motor, m. rev. rating 1410 rpm (Hz), 16 rpm (Hz) HKLW 34 1-phase motor, m. rev. rating 1410 rpm (Hz), 16 rpm (Hz) HKL 32 3-phase motor, m. rev. rating 28 rpm (Hz), 3410 rpm (Hz) HKLW 32 1-phase motor, m. rev. rating 2800 rpm (Hz), 34 rpm (Hz) 2.1. Motor and tank section Both, plus the pump section (see section and 2.2. yield the basic hydraulic power pack. Order example: HKL 348 DT /1 - H1,15 - A1/ /2V!/ Hz HKL 32 /2 - H6, - B31/80 - EM11V - G /2V!/ Hz HKLW 34 DT /1 - Z6,0 - AL11C/ V Hz HKLW 32 T /1 - HZ0,88/5,2 - NA31-AR//-WGZ4-1R-WG 1 + V Hz Basic type Tank size Additional functions Arrangement of the connection pedestal (viewed from the fan wheel) for direct mounting of connection block / directional valve bank (see sect. 5.5) Fan shroud material coding 8 coding D T Filling volume (l) Total usable (l) 3,7 1,7 5,5 2,6 / 1,7 2 ) Only type HKL Float switch ( NC-contact) Temperature switch (Standard with type HKLW) ) 3 3 ) Standard coding Sheet steel version C Plastic version 4 ) Symbol accordingly to the 1. order example (sect. } Coding T Coding D 1) Type HKLW34../.-H.. or HKLW34../.-Z.. only as single circuit pump Usable filling volume, 2.6 l with single circuit pumps, 1.7 l with dual circuit pumps 3) Rotated versions are only available for single circuit pumps 4) Weight saving approx. 0,5 kg
3 D -3L page Motor and tank section Single circuit pump Symbol accordingly to 1: Order example 1: HKL 348 DT/1 - H6,7 - A1/ /2V!/ Hz Order example 2: HKL 32/1 - Z4,5 - AL11E/ 3 + 0/2V!/ Hz Table 2: Single circuit pump H Codings for radial piston pump Piston diameters (mm) Delivery flow coding (4-cylinder pump) 1,15 1, 2,15 3, 4,8 5,7 6,7 7,7 8,7 Geom. displacement V g (cm 3 /rev) HKL 34 Hz Hz Continuous operation S1 p 1 (bar) HKL 32 Hz Hz Continuous operation S1 p 1 (bar) HKLW 34 Hz Hz Continuous operation S1 p 1 (bar) HKLW 32 Hz Hz Continuous operation S1 p 1 (bar) Z Coding for gear pump Delivery flow coding 2,0 2,7 3,5 4,5 5,2 6,4 6,9 8,8 9,8 11,3 Geom. displacement V g (cm 3 /rev) HKL 34 (lpm) Hz Hz Continuous operation S1 p 1 (bar) 1 HKL 32 (lpm) Hz Hz Continuous operation S1 p 1 (bar) 155 HKLW 34 (lpm) Hz Hz Continuous operation S1 p 1 (bar) HKLW 32 (lpm) Hz Hz Continuous operation S1 p 1 (bar) ) An inertia excess temperature of approx. K can be expect with the max. permissible pressure mentioned in the tables 2a and 2b, if p1 is t exceeded in continuous operation S1 and the indicated load periods are apparent in the -load/load operation S6-10 min % ED. This temperature usually will be considerably lower in the practical case, see also section 5.4. These temperature figures do apply to usual operation, taking into consideration the unavoidable losses due to back pressure in pipes and valves. Additional losses caused by flow control valves, pressure control valves, orifices etc. may lead to a higher inertia excess temperature, depending on the time involved. Type HKLW 34: Capacitor required for operation, C B = µf (2V / Hz) or C B = µf (V / Hz). Type HKLW 32: Capacitor required for operation, C B = µf (2V / Hz) or C B = µf (V / Hz). Will t start-up against pressure! 3) Guide line figure, based on m. rev. rating at mains frequency Hz or Hz. The delivery flow will be slightly reduced due to speed drop in the area of p max (see sect. 5.1).
4 D -3L page Dual circuit pump Order exammmple 1: HKLW 32DT/1 - HH 0,88/5,7 - NA31-AR//-WGZ4-1R-WG 1 + V Hz Order exammmple 2: HKL 348 /1 - HZ 0,57/4,5 - C - A1/ /2V!/ Hz Pressure outlet P1: Pressure outlet P 3: H.. = Radial piston pump acc. to table 4 Z.. = Gear pump acc. to table 4 Table 3: Radial piston pump (high pressure stage with dual stage pump) H Codings for radial piston pump 4 Piston diameters (mm) Delivery flow coding (4-cylinder pump) 0,37 0,57 0,88 1, 1,42 1,82 Geom. displacemant V g (cm 3 /rev) HKL 34 Hz Hz Continuous operation S1 p 1 (bar) 4 ) HKL 32 Hz Hz Continuous operation S1 p 1 (bar) 4 ) HKLW 32 Hz Hz Continuous operation S1 p 1 (bar) 4 ) ) An inertia excess temperature of approx. K can be expect with the max. permissible pressure mentioned in the tables 2a and 2b, if p1 is t exceeded in continuous operation S1 and the indicated load periods are apparent in the -load/load operation S6-10 min %ED. This temperature usually will be considerably lower in the practical case, see also section 5.4. These temperature figures do apply to usual operation, taking into consideration the unavoidable losses due to back pressure in pipes and valves. Additional losses caused by flow control valves, pressure control valves, orifices etc. may lead to a higher inertia excess temperature, depending on the time involved. Capacitor required for operation, CB = mf (2V / Hz) or CB = mf (V / Hz) Will t start-up against pressure! 3) The middled pressure of subsequent load cycles (e.g. at accumulator charging operation) should t exceed... % of p1 to ensure an ecomic service life of the bearings. Guide line figure, based on m. rev. rating at mains frequency Hz or Hz. The delivery flow will be slightly reduced due to speed drop in the area of p max (see sect. 5.1). 4) Max. pressure depends on the load of the simultaneously loaded pressure circuits and the drive power. It should be restricted eventually, see sect Symbol accordingly to order example1: Symbol accordingly to order example2:
5 D -3L page 5 Order exammple 1: HKLW 32 DT/1 - HH 0,88/5,7 - NA31- AR//-WGZ4-1R-WG 1 + V Hz Order exammple 2: HKL 348 /1 - HZ 0,57/4,5 - C - A1/ /2V!/ Hz Druckanschluß P1 Table 3 Pressure outlet P3: Table 4: Radial piston pump H or gear pump Z (low pressure stage with dual circuit pumps) H Codings for radial piston pump Piston diameters (mm) Delivery flow coding (4-cylinder pump) 1,15 1, 2,15 3, 4,8 5,7 6,7 7,7 8,7 Geom. displacement V g (cm 3 /rev) HKL 34 (lpm) Hz Hz Continuous operation S1 (bar) 4 ) HKL 32 (lpm) Hz Hz Continuous operation S1 (bar) 4 ) HKLW 32 (lpm) Hz Hz Continuous operation S1 (bar) 4 ) Z Codings for gear pump Delivery flow coding 2,0 2,7 3,5 4,5 5,2 6,4 6,9 8,8 9,8 11,3 Geom. displacement V g (cm 3 /rev) HKL 34 (lpm) Hz Hz Continuous operation S1 (bar) 4 ) 1 HKL 32 (lpm) Hz Hz Continuous operation S1 (bar) 4 ) 155 HKLW 32 (lpm) Hz Hz Continuous operation S1 (bar) 4 ) ) An inertia excess temperature of approx. K can be expect with the max. permissible pressure mentioned in the tables 2a and 2b, if p1 is t exceeded in continuous operation S1 and the indicated load periods are apparent in the -load/load operation S6-10 min %ED. This temperature usually will be considerably lower in the practical case, see also section 5.4. These temperature figures do apply to usual operation, taking into consideration the unavoidable losses due to back pressure in pipes and valves. Additional losses caused by flow control valves, pressure control valves, orifices etc. may lead to a higher inertia excess temperature, depending on the time involved. Capacitor required for operation, CB = mf (2V / Hz) or CB = mf (V / Hz) Will t start-up against pressure! 3) Guide line figure, based on m. rev. rating at mains frequency Hz or Hz. The delivery flow will be slightly reduced due to speed drop in the area of p max (see sect. 5.1). 4) Max. pressure depends on the load of the simultaneously loaded pressure circuits and the drive power. It should be restricted eventually, see sect. 5.1.
6 D -3L page 6 3. Further characteristic data 3.1. General and hydraulic Nomenclature Design Constant delivery pump Valve controlled radial piston pump or play compensated gear pump (with external toothing) Direction of rotation Type H.. and HH.. = Any Z.. and HZ.. = counter clock-wise It is therefore necessary to check the rotation direction of the motor. The fan wheel has to rotate counter clockwise after starting the motor when looking through the perforation of the fan shroud. The connection of two of the three main wires has to be interchanged at the terminal strip or the special plug CEE 17 (DIN 4946 should be used enabling these changes in the plug, if the direction of rotation is wrong. Mass (weight) Installed position approx kg (basic pump, without any optional devices) Only horizontally Mounting via four supports with holes #9 mm, see also sect. 4 and 5.3 Pipe connection Depending on the connection block, see section 5.5 P... Pressurized oil outlet or G 3/8 (BSPP) R... Reflow port or G 3/8 (BSPP) (must t be used as suction port) A, B.. Consumer ports if directional valve banks are mounted, see also the pamphlets mentioned in section 5.6, or G 3/8 (BSPP) Filling and usable volume max. filling volume = 3.7 l ( coding) or 5.5 l (coding 8) max. usable volume = 1.7 l ( coding) or = 2.6 l (coding 8, with single circuit pumps) = 1.7 l (coding 8, with dual circuit pumps) / max. / min. For circuitry of the float switch, see sect. 2.1 Pressure range Delivery side (outlet ports P, P1 und P3) depending on pump design and delivery flow, see sect Pressure fluid Hydraulic oil conforming DIN part 1 to 3; ISO VG 10 to 68 conform. DIN Viscosity range: min. approx. 4; max. approx. 10 mm 2 /s Opt. operation range: approx mm 2 /s Also suitable are biologically degradable pressure fluids type HEES (Synth. Ester) at service temperatures up to approx. + C. Electrically hazardous: Any fluid types containing water must t be used (short-cut). Temperature Ambient: approx C Fluid: C, Note the viscosity range! Permissible temperature during start: - C (observe start-viscosity!), as long as the service temperature is at least K higher for the following operation. Biologically degradable pressure fluids: Observe manufacturer s specifications. By consideration of the compatibility with seal material t over + C.
7 D -3L page Electrical data Type of pump HKL 34 HKL 32 HKLW 34 HKLW 32 Motor Nom. voltage 1 ) Mains frequency Rev. rating Output Current Start current ratio Power factor Capacitor for operation 2 ) Protection classification (V) (Hz) (min -1 ) (kw) (A) (I A /I N ) (cos ϕ) (µf/0v DB) 3-phase mains, 4-pole 0/ 2!/ / / 2!/ / phase mains, 2-pole 0/ 2!/ / / 2!/ / phase mains, 4-pole phase mains, 2-pole Terminals, if optional equipment is apparent Terminal box at the pump housing ISO 7- M4x-4.8-A2K M x 1.5 ISO 7- M4x8-4.8-A2K Terminal rail for optional equipment M x 1.5 Version for 3-phase mains Version for 1-phase mains SCustomer furnished circuitry (For tes regarding the EMC, see sect ) Mains 3 + 0V(4V)!- connection (state of delivery) Mains 3 + 2V(2V) /-connection Mains 1 + V(V) Optional equipment Float switch D Max. switched power DC/AC... W / VA Permissible current DC and AC A (cos ϕ = 1) Max. voltage... 2V / Hz Temperature range... ca C A protective circuit should be employed with inductive load. NC-contact Temperature switch T Signaling takes place at a housing temperature of approx. 80 C. (mainly safe guarding the winding, only type HKLW) Max. voltage... 2V / Hz Nom. current (cos ϕ ~ 0.6) A Max. voltage with V DC A (cos ϕ = 1) NC-contact Electr. connection The float switch D is always connected to 1-2 The temperature switch T is always connected to 3-4 } Combination DT: Both switches D and T are connected in series via bridge 2-3 exworks and shall be attached by 1-4. This bridge is to be removed if they should be used individually. Bridge D } T 1) For permissible voltage ranges see sect. 5.1 Capacitor for operation is t scope of delivery!
8 D -3L page 8 4. Unit dimensions All dimensions are in mm and are subject to change without tice! 4.1. Basic power pack type HKL and HKLW 486 (coding 8) Terminal box may be rotated 3x Connection pedestal 1 ) Cable gland M x 1.5 Filler neck Oil level gauge A B C at B at A C (coding 8) Drain Detail C: Installation example M8x Silentbloc # x / M8 ( Sh), also see sect. 5.3 Connection pedestal 1 ) Single circuit pump (sect , table Centering pin Bore holes for customer furnished connection blocks. M6, deep M8, deep Centering pin Sealing of ports: P and P1 = Kantseal 6.07x1.68 NBR Sh P3 and R = 8x2 NBR Sh Dual circuit pump (sect , table 3 and 4) For missing dimensions, see above! 1) Illustrated is the standard mode of installation, but the terminal box may be installed also on front or rear (coding /2 and /3, see sect. 2.1)
9 D -3L page 9 5. Appendix 5.1. I M - p B - Q Pu - characteristics The current consumption of the motor depends strongly on its load. The minal figures of sect. 3.2 apply strictly to one operating point only. The pumps may be operated continuously up to the max. pressure p1 stated in sect Up to 1.8s of the minal power of the motor can be exploited during load / load operation. The increased heat built-up under these conditions gets intensively radiated during the idle periods (also see sect. 5.4). The product of pv g (bar cm 3 /rev) is laid off as abscissa in these curves. This makes a rough consideration possible for the current and the delivery flow to be expected, which is sufficient under most conditions. The respective load is determining for the current consumption of dual circuit pumps. The performance of the individual circuits has to be determined and added up. The current to be expected can be found via (pvg) calc. in the curves. The permissible limit figures for pressure p 1 and p 3 should t be exceeded even if the available motor output isn't completely employed. V g1 and V g3 are the geometric displacements from the tables in section HKL 34 3~ 0/2V Hz!/ 1 ) Operating voltage 3~ 4/2V Hz!/ 1 ) Motor current i M (A) 0V Hz Middle, arithmetical performance p m V g (bar x cm 3 /rev) Delivery flow (tendency) 3 ) HKL 32 3~ 0/2V Hz!/ 1 ) Operating voltage 3~ 4/2V Hz!/ 1 ) All pressure outlets loaded: Dual circuit pumps One pressure outlet loaded the other one in idle circulation mode: Dual circuit pumps p 1, V g1 p 3, V g3 (pv g ) calc. = p 1 V g1 + p 3 V g3 p 1, V g1 p 3 = p L (pv g ) arithmetical = p 1 V g1 + p L V g3 Motor current I M (A) 0V Hz Middle, arithmetical performance p m V g (bar x cm 3 /rev) HKLW 34 Operating voltage 1~ 2V Hz 1~ V Hz Delivery flow (tendency) 3 ) 1) U N = x -10% -5% +10% +5% 0/2V Hz 4/2V Hz U, f 3/210V Hz 4/2V Hz 4/2V Hz 480/280V Hz 3) 1.0 = Q Pu acc. to table 2, 3 and 4 Permissible voltage ranges Mains: Hz: *10% U N (like IEC 38) Mains: Hz: *5% U N Reduced voltage will cause a performance drop (& reduced p max. ). Reference value: p oper. Example : U actual. = 0V Hz U N = 4V Hz p oper. max. = 0, 85 p 0V 0, 7 4V 0,85 p max. p L = Back pressure of the respective piping and valve bank U U actual p m = Middle operating pressure (bar) V g = Geometric displacement (cm 3 ) (according to flow codings) N max p max Motor current I M (A) V Hz Motor current I M (A) V Hz Motor current I M (A) 2V Hz Motor current I M (A) 2V Hz Middle, arithmetical performance p m V g (bar x cm 3 /rev) HKLW 32 1~ 2V Hz 1 ) Operating voltage 1~ V Hz 1 ) Middle, arithmetical performance p m V g (bar x cm 3 /rev) Delivery flow (tendency) 3 ) Delivery flow (tendency) 3 )
10 D -3L page Motor protection circuitries and EMC Protective motor switches S1-operation: (for pressure p 1 ) The bimetallic switch should be set for the corresponding current, required to achieve the adjusted pressure of the pressure limiting valve (see I M -(pv) calc. - curve sect. 5.1), however t higher than the m. current I N. This motor protection covers only a possible mechanical blockade of the motor. The pressure limiting valve responses at pressure overload, without a rise beyond the corresponding motor current I M. The pump would run on and on, resulting in an overheat after a certain time like any other hydraulic power pack of classic construction would do. Such a pressure overload can occur either due to overload of a consumer or start against a stop. This can be immediately identified as the consumer movement stops and also the idle signal would be missing (Idle circulation valve doesn't open in the idle periods). A permanent pressure monitoring via a pressure gauge helps to identify such a malfunction. It is therefore recommended to use a pressure switch for self-supervisioning of the idle periods especially for automatic, t permanently manned systems. S6-operation: (for pressure p max ) In most cases it is sufficient, to set the response current to approx. ( ) of I N. This makes sure that on one hand the bimetallic switch does t trigger too early during rmal operation but on the other hand the oil temperature doesn't rise too high due to a prolonged response time after the pressure limiting valve is in action. Malfunctions during idle circulation mode, like described for S1-operation, are more reliably and immediately detected by idle supervisioning. It has to be taken into account that these tes for adjustment only represent very coarse reference values and perhaps must be corrected a little during a definite test run of the system. This might occur e.g. if the actually required performance of the pump (in S6-operation) is higher than calculated. Too early triggering of the bimetallic switch will be caused as the temperature of the system would be higher after prolonged operation than anticipated thereby reducing the response period of the switch Temperature switch (acc. to sect. 3. Examples: This is an additional monitoring device (standard with type HKLW, optional for type HKL), which will cut-off the pump if the fluid temperature rises over 80 C due to any malfunction. A pump is running too long against the pressure limiting valve at a unmanned system because the signal for idle circulation was t released. The response period will be too long due to the low current consumption. The ambient temperature is too high, because it was t considered during lay-out of the system or it occurs unintended. Too much heat is generated in the system because of additional throttle losses caused by flow control valves, pressure reducing valves, orifices etc. Attention: The temperature switch will trigger only after the oil temperature is above approx. 95 C Float switch (acc. to sect. 3. Examples: This is an optional monitoring device, which will either cut-off the pump or trigger a signal as soon as the fluid level drops below a certain level. Line rapture will cause an immediate stop, preventing complete emptying of the tank and dry running of the pump. A signal will be triggered if the system was t refilled after design related fluid losses. Attention: The signal has to be delayed sufficiently (time lag relay) if the lay-out of the system features an operation cycle where the pump is emptied below the min. level and replenished by the reflow from the consumer within one cycle Notes to ensure EMC (Electromagnetic compatibility) The compact hydraulic power packs of HAWE are excluded by the EMC-regulation ( 5, chapter 5) as they are turn-key devices. We recommend the interference suppressors type 231, 3 0 VAC 4 kw - Hz of Murr-Elektronik in D-715 Oppenweiler, if any interferences should occur Running ise HKL(W).. Sound pressure levels db(a) Pressure (bar) Pressure (bar) Work room, interference level approx. db(a); Measuring point 1m above the floor; 1m object clearance, pump fixed with 4 silentblocs Øx Shore, (Messrs. Schwingmetall No. 291/V). Measuring device: Precision sound pressure level measuring instrument DIN IEC 1 Kl. I Viscosity of the oil: Approx. mm 2 /s The sound pressure level ranges shall serve to estimate the running ise to be expected. They approximately delimit the spreads recognizable during measuring. Pumps with smaller delivery flows tend as a rule to the lower, whereas larger ones tend to the upper limit. The ise level of dual circuit pumps are similar to the one of single circuit radial piston pumps, if the total delivery flow is rather identical. Rigid mounting on a surface capable of resonance (e.g. welded or thin-wall machine stands) may significantly amplify or conduct the operation ise level. We recommend to mount the compact hydraulic power pack via silentblocs e.g. Øx, Shore (see specifications of the measuring conditions).
11 D -3L page Heat built-up he persistent service temperature is reached after approximately one hour of operating time. Influence-factors: Pressure distribution during the load duration (middled pressure), share of the idle period, additional throttle losses, exceeding usual figures of back pressure for pipes and valves (pressure reducing valves, flow control valves, throttling valves, or throttles). These influences only have to be taken into account if they are effective for a longer period within the operating cycle (load duration). The two most essential parameter, middled performance of the pump and load duration per operating cycle are usually sufficient for a rough re-check of the expected persistent fluid service temperature. The curves below supply a rough guideline how far the persistent service temperature /}B of the compact hydraulic power packs will settle above the ambient temperature }U. Persistent service temperature to be expected } B (K) Middle, arithmetical performance p m V g (bar x cm 3 /rev) } fluid B = } B + } U Working cycle The /} B - p m V g -curves below supply a rough guideline how far the persistent service temperature of the compact hydraulic power packs will settle above the ambient temperature, only covering usual figures of back pressure for pipes and valves. The persistent service temperature will settle higher if additional throttle losses occur caused by e.g. pressure reducing valves, flow control valves, throttling valves, throttles or periodical start against the pressure limiting valve. Calculation example: Load duration Idle period Idle period One operating cycle } fluid B ( C) = Persistent service temperature of the oil filling /} B (K) = Excess temperature after applied load, diagram } U ( C) = Ambient temperature in the installation area of the compact hydraulic power pack. p m (bar) = Calculated, middled pressure per cycle during the load durationt t B = t 1 + t 2 + t p m V g bar cm 3 1 p2 + p3 /turn = pm = p1 t1 + p2 t2 + t tb 2 p m V g = Middled performance with V g = geometric displacement acc. to the tables in sect %BD (-) = Relative load duration per operating cycle %BD = t B t B + t L Given: Pressure profile simplified down to asy geometric shape with cycle period T laid-off as abscissa. Selected pump HKL 34 - H4,80 with geom. displacement V g = 3.44 cm 3 /rev Pressure Time p 1 = bar t 1 = 15s p 2 = 0 bar t 2 = s p 3 = bar t 3 = 8s (p L1 = 0 bar) t L1 = 10s (p L2 = 0 bar) t L2 = s T = 73s (t B = 43s) Calculated: Middled pressure during the load duration t B = t 1 + t 2 + t 3 = 43s 1 p1 + p2 pm = p1 t1 + tb 2 t2 + p3 t3 = = , bar 43 2 Middle value for pump performance p m V g = 3.44, 4 bar cm 3 /turn t B 43 Relative load duration %BD = =, % T 73 Resulting in /} B, K - from the /} B - p m V g - curve This means, that the persistent service temperature of the compact hydraulic power pack at an ambient temperature } U = C will be approx. + = 55 C (under the pre-defined conditions and uninterrupted cycles).
12 D -3L page 5.5. Connection blocks Table 5: Connection blocks, overview Pamphlet D C D B D A/1 D TÜV D 72 D 74 D A/1 Coding C5 C6 B../ A1/.. to A4/.. A13/.. to A43/.. A51/.. and A61/.. AS(V)1/.. to AS(V)4/.. AL11(1.. A..F../.. AS..F../.. AM..F../.. AK..F../.. AL21F../.. AL21D../.. AP1.. and AP3.. AX14.. and AX3.. SKC11.. bis SKC14.. SWC1 NA AN C SS to VV V1/.. to S4/.. Port threads DIN ISO 228/1 (BSPP) G 3/8 to G 1/2 G 3/8 G 3/8 to G 1/2 dep. on type and connection side and G 3/8 G1/4 G1/4 G1/4 and G 3/8 Pressure range from... to (bar) 1 ) 4 () (0)... in steps (0)... 4 in steps in steps (0)... in steps depending on type ) Flow (lpm) depending on filter size Integrated functional elements ) Pressure Idle circulation Reflow limiting filter valve valve 4 ) 5 ) 4 ) 4 ) 6 ) 9 ) 11 ) 11 ) 4 ) 7) Brief tes to the connection block Simple connection block For single acting lifting or clamping devices 1 ) 2 ) Most frequently used connection block with pressure limiting valve More seldomly used for HK 3 ) With idle circulation valves acc. to D 74/1 automatic idle circulation 4 ) (accumulator charging valve) With reflow filters µm abs. % / µm abs. or pressure resistant filters 10 µm (β 10 = 75) with AL21D.. and idle circulation valves, see 6 ) Proportional pressure limiting valve Integrated directional spool valve Integrated directional spool valve Integrated directional spool valve Two stage valve Suitable directional valve banks for direct mounting 1) No possibility for mounting 1a 2 3 1a 1a 8 ) 4 8 ) 1a 1b 1b 1b Add-on spool valves acc. to D 72 Add-on spool valves acc. to D 74 Two stage valve 1a, 1b Intermediate block for Connection dual circuit pump blocks A.. Idle circulation for P1 and/or P3 acc. to D A/1 Second pressure stage can be activated arbitrarily 1a 1b 1) It should be kept in mind that the directional valve banks which can be directly mounted may have a max. permissible pressure below bar. Pumps type HKL(W) should be used for intermittent service only 3) The valves are directing radially to the outside 4) Hydraulic cut-off function acts as pressure limitation also 5) Depending on type also with additional proportional pressure limiting valve 6) Idle circulation valve acc. to D 74/1 with AS..., acc. to D 74A/1 with AK... and AM..., with automatic idle circulation (accumulator charging valve) with AL ) With pressure resistant filter at AL21...D 8) Directional spool valve banks type SWR.., SWS.. are t ideally suited for mounting onto blocks type AL11(1 or AL21.., as the their always apparent leakage would provoke permanent activation. This effect could be minimized by using an accumulator. 9) May be used as idle circulation valve if the prop. soleid is deenergized (approx. 5 bar) 10) Depending on actuation and flow pattern 11) For directional spool valves with internal connection P R in idle position 1 Pressure limiting valves acc. to D 0E/1, 2/2-way directional valves acc. to D 74/1, optional with additional check valve acc. to D 74 1a BWN(H)1F... acc. to D 74 B/1 BWH2F... acc. to D 74 B/1 BVZP1F... acc. to D 7785 B 1b VB01(11)F... acc. to D 72 SWR(P)1F... acc. to D 74 SWR2F... acc. to D 71 SWS2F... acc. to D BWH3F... acc. to D 74 B/1 3 VB11G... and VB21G... acc. to D 72 4 BWN(H)1F... acc. to D 74 B/1 BWH2F... acc. to D 74 B/1 BVZP1F... acc. to D 7785 B VB01(11)F... acc. to D 72 SWR(P)1F... acc. to D 74 8 ) SWR2F... acc. to D 71 8 ) SWS2F... acc. to D )
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