Vane pump, direct operated

Transcription

1 Vane pump, direct operated RE 1/8.8 Replaces: 1. 1/18 Type PV7 A Nominal sizes 1 to Series 1X / X Maximum operating pressure 1 bar Displacement volume 1 to cm 3 H17 H9 Overview of contents Features Contents Page Features 1 Ordering details, Preferred types Symbol Function, section 3 Technical Data Dynamic characteristics Characteristic curves to 9 Unit dimensions 1 Multiple pumps 11 to 1 Engineering guidelines for multiple pumps 1 Installation guidelines 1 Engineering guidelines, Commissioning guidelines 17 Very short control times Low operating noise Mounting and connection dimensions to VDMA /1 and ISO 319/ Good efficiency Long service life Adjustable displacement volumes Information on available spare parts:

2 /18 Bosch Rexroth AG Hydraulics PV7...A RE 1/8.8 Ordering details Series BS = 1X (series 1 to 19) BS = X (series to 9) 1 to 19; to 9: installation and connection dimensions unchanged Build size BS Nominal size NS 1 cm 3 = 1 1 cm 3 = 1 cm 3 = cm 3 = Direction of rotation Clockwise (viewed on the drive shaft) = R Drive shaft Cylindrical drive shaft = A Cylindrical drive shaft with throught drive = E Pipe connections Suction and pressure connections = 1 Pipe thread to ISO 8/1 Ordering examples: PV7 R 1 A * PV7-1X/-1RA1MA-1 PV7-X/-RA1MA- M = K = A = Further details in clear text Zero stroke pressure range ) V7/-1 = to bar 1 = to 1 bar V7/-1 = 1 to bar 7 = to 7 bar V7/ = to bar 1 = to 1 bar Adjustment device = Adjustment screw (standard) 3 = 1) Lockable rotary knob and scale (for BG ) 3 = Controller with lock (for BG ) direct operated Seals NBR - seals, suitable for mineral oil HLP to DIN 1 FKM shaft seal (other seals from NBR) suitable for use with HETG- and HEES-pressure fluids to VDMA SW Pump with customer specific settings: PV7-X/-RA1MA-1 details in clear text: q V max = l/min; p zero stroke = 7 bar The pump will be set to the required values. The optimum operating noise will be set at the required zero stroke pressure. Without any clear text setting information the flow and the zero stroke pressure will be set to the relevant maximum values. 1) H-key with Material No. R9818 is included within the scope of supply. ) As delivered the zero stroke pressure is set to the smallest value! Further preferred types and standards can be found in the EPS (Standard Price List). Preferred types (readily available) Type Material No. Type Material No. PV7-1X/-1RA1MA- R9187 PV7-X/-RA1MA- R999 PV7-1X/-1RA1MA-1 R9333 PV7-X/-RA1MA-1 R9993 PV7-1X/-1RA1MA- R99193 PV7-X/-RA1MA- R999 PV7-1X/-1RA1MA-7 R PV7-X/-RA1MA-1 R999 Symbol P S L

3 RE 1/8.8 PV7...A Hydraulics Bosch Rexroth AG 3/18 Function, section Type PV7...A hydraulic pumps are direct operated vane pumps with an adjustable displacement volume. The basically comprise of the housing (1), cover (), rotor (3), vanes (), stator ring (), compression spring (), adjustment screw (7) and control plate (8). For limiting the maximum flow, the pump is fitted with an adjustment screw (9). The driven rotor (3) rotates within the stator ring (). The vanes () which are guided in the rotor (3) are pressed against the inner running surface of the stator ring () by centrifugal force. Suction and displacement process The chambers (1) which are required for the transport of the fluid are formed by the vanes (), the rotor (3), the stator ring (), the control plate (8) and the cover plate (). The chamber volume increases as the rotor (3) rotates and the chambers fill themselves with fluid via the suction channel (S). When the largest chamber volume is reached, the chambers (1) are separated from the suction side. As the rotor (3) continues to rotate the connection to the pressure fluid side is opened, the chambers decrease in size and force the fluid into the system via the pressure port (P). Pressure control The stator ring () is held in its initial excentric position by spring (). The maximum operating pressure required in the system is set at the adjustment screw (7) via the spring (). The pressure which builds up due to the work resistance acts on the pressure side of the inner running surface of the stator ring (), against the force of the spring (). When the relevant pressure is reached, which is determined by the set spring force, the stator ring () is moved out of its excentric position in the direction of the zero position. The flow adjusts itself to the value which is being demanded at that time. When the highest set pressure, which has been set at the spring (), has been reached then the pump regulates the flow back to virtually zero. The operating pressure is maintained and only the leakage fluid is replaced. Losses and heating of the fluid is thereby minimised P S Type PV7-1X/ A... 8 S P L 9 1 Type PV7-X/ A... S

4 /18 Bosch Rexroth AG Hydraulics PV7...A RE 1/8.8 Technical Data (for applications outside these parameters, please consult us!) allgemein Mounting style Flange mounting Pipe connections Pipe thread G... to ISO 8/1 Installation Optional Shaft loading Radial and axial forces cannot to taken up Direction of rotation Clockwise (viewed on the drive shaft) Drive speed n min 1 9 to 18 Weight m kg hydraulic Build size BS Nominal size / displacement volume V cm Max. permissible drive torque T Nm 11 Operating pressure, absolute Inlet p min-max bar.8 bis. Outlet p max bar Leakage outlet q max bar Leakage flow at zero stroke q V l/min (at operating pressure output = p zero stroke max) Max. flow 1) q V (at n = 1 min 1 ; p = 1 bar; ν = 1 mm /s) l/min Pressure fluid HLP mineral oil to DIN 1 parat Please take the specifications stated within catalogue sheet RE 77 into account! Class 19/1/13 ) Pressure fluid temperature range ϑ C 1 to +7, take the permissible viscosity range into account! Viscosity range ν mm /s 1 to 1 at operating temperature Max. 8 when starting under displacement conditions Max. when starting under zero stroke conditions Maximum permissible degree of contamination of the pressure fluid is to ISO (c) ) 1) Flow deviations due to manufacturing tolerances of a max. of + % is possible ) The cleanliness class stated for the components must be adhered too in hydraulic systems. Effective filtration prevents faults from occurring and at the same time increases the component service life. For the selection of filters see catalogue sheets RE 7, RE 7 and RE 81.

5 RE 1/8.8 PV7...A Hydraulics Bosch Rexroth AG /18 Dynamic characteristics, measurement build-up (measured at n = 1 min 1, ν = 1 mm /s and ϑ = C) The control times are valid for the measurement build-up as shown. For other set-ups and line lengths the control times will change. 1 Control times (average value) t down / t up Directional valve (switching time 3 ms) Throttle for setting the pressure during displacement 3 Hydro pump Pressure measurement point 3 Operating pressure p Control down bar t 1 ab t ab p N Zeit t Operating pressure p p N t 1 auf t auf Control up 1 bar Zeit t q V displacement q V zero stroke q V zero stroke q V displacement Pump type Pressure p N bar t 1 down t down p max 1) t 1 up t up ) Permissible pressure peaks

6 /18 Bosch Rexroth AG Hydraulics PV7...A RE 1/8.8 Characteristic curves: type PV7/ 1, (measured at n = 1 min- 1, ν = 1 mm /s and ϑ = C) 1 1 3, Flow in l/min A... P displacement, 1, Drive power in kw P zero stroke Flow in l/min A 1... P displacement 3,, 1, Drive power in kw P zero stroke Noise pressure level Noise pressure level in db(a) during displacement at zero stroke Measured in anechoic chamber to DIN 3, page Distance: Noise sensor pump = 1m

7 RE 1/8.8 PV7...A Hydraulics Bosch Rexroth AG 7/18 Characteristic curves: type PV7/ 1, (measured at n = 1 min- 1, ν = 1 mm /s and ϑ = C) Flow in l/min A... P displacement 3,, 1, Drive power in kw P zero stroke 1 3 Flow in l/min A 7... P displacement 3,, 1, Drive power in kw P zero stroke Noise pressure level Noise pressure level in db(a) during displacement at zero stroke Measured in anechoic chamber to DIN 3, page Distance: Noise sensor pump = 1m

8 8/18 Bosch Rexroth AG Hydraulics PV7...A RE 1/8.8 Characteristic curves: type PV7/, (measured at n = 1 min- 1, ν = 1 mm /s and ϑ = C) 3 Flow in l/min 1 1 A- P displacement P zero stroke Drive power in kw 3 Flow in l/min 1 1 A-1 P displacement P zero stroke 3 1 Drive power in kw Noise pressure level Noise pressure level in db(a) 8 during displacement at zero stroke Measured in anechoic chamber to DIN 3, page Distance: Noise sensor pump = 1m

9 RE 1/8.8 PV7...A Hydraulics Bosch Rexroth AG 9/18 Characteristic curves: type PV7/, (measured at n = 1 min- 1, ν = 1 mm /s and ϑ = C) 3 3 A- 7 Flow in l/min 1 1 P displacement P zero stroke Drive power in kw 3 7 Flow in l/min 3 1 A-1 P displacement 3 Drive power in kw 1 P zero stroke Noise pressure level Noise pressure level in db(a) Measured in anechoic chamber to DIN 3, page Distance: Noise sensor pump = 1m during displacement at zero stroke 7 1

10 1/18 Bosch Rexroth AG Hydraulics PV7...A RE 1/8.8 Unit dimensions (dimensions in mm) PV7/ 1 8, max 11, h max. 1 3 G 3/8, h9 Ø1 H13 ; 7 Ø8 h8, Ø j 3 P L S 1,, G 1/ G 1/ Ø11, ±, 1 17,7 197,7, ±,, ±, 9 7 PV7/ G 1/ G 1/ 3 Ø11 H Ø1 h8 8 Ø j P L 1 1 ±, 8 h9 S 13 max. 79 max G 3/ 1 1 Flow adjustment Adjustment guidelines: With clockwise rotation, the flow decreases With anti-clockwise rotation, the flow increases Note: The change in flow for one turn of the adjustment screw is for: PV7/ approx. 7. l/min PV7/ approx. 1 l/min each at n = 1 min -1 Pressure adjustment: Adjustment guidelines: With clockwise rotation, the operating pressure increases With anti-clockwise rotation, the operating pressure decreases 3 Pressure connection Suction connection Drain port Drive shaft max. 7 Pressure adjustment via adjustment screw (standard), ordering detail... 8 Pressure adjustment with lockable rotary knob with scale, ordering detail Space required to remove key 1 Lock

11 RE 1/8.8 PV7...A Hydraulics Bosch Rexroth AG 11/18 Multiple pumps Material No. combination parts Rear pump Front pump V7-1X/ RE V7-X/ RE PV7-1X/...RA... R9889 R981 PV7-X/...RA... R9813 PGF1-X/...RE1VU R9878 PGF-X/ RJ R93373 R911 PGP-X/ RJ R93373 R911 PGH-X/ RR R93373 R911 PGH3-X/ RR R93373 R911 AZPF RR R93373 R911 A1VSO1..U R93373 R911 A1VSO18..U R93373 R911 PGF3-3X/...RJ... R98887 PVV/Q1/-1X/...RJ... R98887 PR-1X/,,- WG R91 PR-3X/1,,- RA R917 Ordering details for multiple pumps PV7 AO + V7 AO R E E Double = P First pump series First pump nominale size First pump controller Second pump series Second pump nominale size Second pump controller First pump mounting flange Second pump connection port Second pump shaft version (if required) 1) First pump connection port First pump shaft version Direction of rotation 1) for PGF and PGF3 Triple and quadruple pumps are coded analogue! Ordering examples: PV7/-A+V7/-1ARE1+1E PV7/-1A+GF/1RE1+JE

12 1/18 Bosch Rexroth AG Hydraulics PV7...A RE 1/8.8 Pump combinations PV7 + V7 (dimensions in mm) B1 JS9 L1 L L L L3 P Ø D 13 Splined hub /8 1 / 3 DP; 9 T M1; ,1 +,3 1, +, 13 Ø 8, H1 Ø D3 Ø D1 x D H13 L S 1st pump BS nd pump BS L1 L L3 ØD1 ØD ØD3 D H1 B1 L L L M M M Pump combinations PV7/- + GF/GP/GH/GH3 (dimensions in mm) Mounting geometry to SAE J 7 Flange 8- (SAE A) Hub 1- (SAE A)

13 RE 1/8.8 PV7...A Hydraulics Bosch Rexroth AG 13/18 Pump combinations PV7/- + GF1 (dimensions in mm) 177 L M1; 13 7 L3 7 3,1 +,3 1, +, 1 / 3 DP; 9 T M1; Ø 8, P 13,8 +,1 3,1 +,3 1, +, 13 Ø 1 F7 Ø 8, +, +,1 S PGF1 nominal size L3 L Pump combinations PV7/- + GF/GP/GH/GH3 (dimensions in mm) Mounting geometry to SAE J 7 Flange 8- (SAE A) Hub 1- (SAE A) Splined hub /8

14 1/18 Bosch Rexroth AG Hydraulics PV7...A RE 1/8.8 Pump combinations PV7/- + GF3/GP3/VV1/VV/GH (dimensions in mm) Mounting geometry to SAE S 7 Flange 11- (SAE B) Hub - (SAE B) x 1 Splined hub DIN 81 Ø +, +, M , 1 Ø 11, Splined hub 7/8 1 / 3 DP; 13 T Pump combinations PV7/- + R-Mini (dimensions in mm) Ø 3 +, +,1 x, H13

15 RE 1/8.8 PV7...A Hydraulics Bosch Rexroth AG 1/18 Pump combination PV7/- + R-Standard (dimensions in mm) L1 L P 8 JS9 8,3 +, Ø F7 Ø 3 +, +,1 Ø 8 +, +,1 x 9 H13 L S L1 L L3 3/ pistons 1 pistons 3/ pistons 1 pistons 3/ pistons 1 pistons , 318 Engineering guidelines for multiple pumps The general technical data is the same as with the single pumps (see page ). The pump with the higher load (pressure x flow) should be the first pump stage. When combining several pumps, the torques produced can reach excessively high values. The sum of the torques must not exceed the permissible values (see table) Single pump T 1 Combination pump T 1 T T max T max 1st pump T ab1 nd pump T ab T ab max PV7 Build size Drive torque T max Max. permissible Output torque T from max T = Δp V.19 (Nm) η hydr.-mech T 1. = (Nm).8 T 1. =.8 Nm T ab max Calculation example: V = Displacement volume in cm 3 η hydr.-mech. = Hydraulic mechanical efficiency T = Torque in Nm Δp = Pressure in bar T = T 1 + T = 93. Nm T max The combination pumps PV7/-.. + V7/-.. can be operated on the basis of the calculated data.

16 1/18 Bosch Rexroth AG Hydraulics PV7...A RE 1/8.8 Installation guidelines Fluid reservoir Match the service capacity of the reservoir to the operating conditions. The permissible fluid temperature must not be exceeded, if required, provide a cooler! Antrieb: E-Motor + Pumpenträger + Kupplung + Pumpe Lines and connections Remove protective plugs from the pump. We recommend the use of seamless precision steel pipes to DIN 391 and removable pipe connections. Select the inside diameter of the pipes according to the ports. Throughly clean pipes and fittings before assembly. keine Radial- und Axialkräfte auf die Pumpen-Antriebswelle zulässig! Motor und Pumpe müssen exakt fluchten! drehelastische Kupplung verwenden Piping recommendations (dimensions in mm) Leakage Installation position Horizontal position preferred B3 min 1 min Suction line B min 1 min V1 The leakage line is to be so fitted that the pump cannot drain! Under no circumstances must leakage and return fluid be directly taken up by the pump! Filter Whenever possible, use return line or pressure filters. (Suction filter only in conjunction with low pressure switch/ clogging indicator) Pressure fluid Please take the specifications stated within catalogue sheet RE 77 into account. We recommend brand name fluids. Do not mix hydraulic fluids of different types since this can result in decomposition and deterioration of the lubricating quality. The fluid must be replaced at regular intervals according to the operating conditions. In connection with this, the tank must also be cleaned of residues.

17 RE 1/8.8 PV7...A Hydraulics Bosch Rexroth AG 17/18 Engineering guidelines Comprehensive instructions and proposals can be found in the Hydraulic Trainer, volume 3 RE 81, Planning and design of hydraulic power systems. When using vane pumps we recommend that the following guidelines are partically taken into account. Technical data All the technical data are dependent on manufacturing tolerances and are valid with certain operating conditions. Please therefore take into account that minor variations are possible and technical data can be affected by differing conditions (e.g. viscosity). Characteristic curves Characteristic curves for flow and absorbed power. Please take into account when dimensioning the drive motor the maximum possible application data. Noise The noise pressure level values given on pages to 7 are measured according to DIN 3 part. This means that only the noise emission of the pump is given. Ambient influences (such as place of installation, piping, etc.) are not taken into consideration. The values only refer to one pump. Attention! The power unit design and the influences at the unit s final place of installation, in general, result in the fact that the noise pressure levels lie to 1 db(a) higher than that of the pump alone. Leakage fluid On page the average external leakage of the pump is stated. Please note that these values are only intended for use as engineering guidelines when defining cooler sizes and pipe sizes. When determining the size of the oil reservoir the appropriate value to be used is the zero stroke power (see pages to 7). Changes in cross-section and the use of a leakage oil cooler can result in there being unpermissibly high pressure peaks in the leak-oil line. Commissioning guidelines Bleeding All of the PV7...A type vane pumps are self-priming. Before commissioning for the first time, the pump has to be bled so that it is protected against damage. During the first commissioning, we recommend that the housing is filled via the leakage connection. Take into account the filter rating! This increases operating safety and prevents wear in the case of unfavourable installation conditions. If the pump after approx. seconds does not displace oil without any bubbles then the system has to be rechecked. After the operating values have been reached, check the pipe connections for leakage and check the operating temperature. Commissioning Check to see if the system has been carefully, correctly and cleanly assembled. Take into account the motor and pump direction of rotation arrows. Start the pump without load and let is displace oil without pressure for a few seconds in order to provide sufficient lubrication. On no account let the pump run without oil! Attention! Adjustment, maintenance and servicing of the pump must only be carried out by authorised, trained and instructed personnel! Use only original Rexroth spare parts! The pump must only be operated within the permitted limits. The pump may only be operated in a sound condition! When carrying out any work on the pump (e.g. removing and refitting) switch the system to zero pressure and isolate from the mains supply! Unauthorised conversions and modifications which affect the safety and function of the pump are not permitted! Provide protective measures (e.g. coupling guard)! Do not remove any existing protective devices! The general valid safety and accident prevention regulations must be adhered too!