xxx displacement pumps TXV for trucks

Transcription

1 Variable xxx xxx displacement pumps TXV for trucks 1

2 sommaire why use a variable displacement pump?... 3 your hydraulic equipment load-sensing variable displacement... 6 TXV 40 to 120 & TXV main characteristics... 8 performance flow pressure control (LS) other products HYDRO LEDUC Head office and factory BP 9 F AZERAILLES (FRANCE) Tel. +33 (0) Fax +33 (0)

3 Why use a variable displacement pump? precise control of all movements ; multi-function capabilities: simultaneous movements, all independant of load ; avoid problems of fluid over-heating ; reduce energy consumption. 3 Variable displacement: only advantages! Installing a TXV variable displacement pump will transform your hydraulic equipment. Slow or rapid movements are done with precision, due to the constant adjustment of pump flow rate. The TXV ranges are the result of over 40 years experience in hydraulic pumps. HYDRO LEDUC, France s leading pump manufacturer, is proud to present these high performance products. HYDRO LEDUC s variable displacement pump is easy to install due to its small size envelope. The range offered, and the corresponding pressure and torque possibilities, mean there is an optimal solution for virtually all industrial and mobile applications.

4 your hydraulic equipment. 2 quick 3 slow and precise 1 slow and precise 4 The pump incorporates a load sensing device to control flow and maximum pressure. This is piloted by a proportional valve which sends a signal directly to the pump to advise of the flow needed by the hydraulic circuits, as a function of required speed but regardless of load. Q 1 & 3 2 For slow, precise movements, the pump can adjust its flow whilst also controlling pressure. This avoids over-heating of fluid, excessive noise and fluid degradation which can occur with fixed displacement pumps. The motor driving the pump only provides the power actually needed by the equipment, thus ensuring longer service life of that equipment, significant gains in energy consumption, and overall a more environmentally friendly solution. For rapid movements, the pump supplies the required flow virtually instantaneously. time The proportional movement of the control lever is perfectly reproduced.

5 load-sensing The load-sensing function allows pump flow to be controlled so as to correspond exactly to what the receiving organs require. At the same time, it controls maximum service pressure of the pump. Optimal operation of the machine which the pump supplies with fluid is thus guaranteed: speed of movement, energy consumption, less heating of fluid Compact Intelligent Rapid response time Numerous options 5 TXV 40 to 120 Designed to fit into a minimal space envelope, HYDRO LEDUC variable displacement pumps are easy to install. aft and flange are to DIN standards, thus guaranteeing simple assembly onto virtually all European PTOs. TXV 130 TXV 130

6 Variable displacement Zero displacement Maximum displacement bleed screw swaplate bleed screw 6 These variable displacement pumps are axial piston pumps. Pump displacement is proportional to the stroke of the pistons. Displacement - and therefore flow - is varied by changing the angle a of the swaplate. Changing the angle a of the swaplate from maximum to minimum enables pump displacement to vary from maximum displacement to zero (flow cancellation). Recommendations for setting the pumps PC relief valve at the pump P1 P1 = maximum working pressure = cancellation pressure adjustable using PR screw Proportional valve Return to tank Receiving organs, cranes, hydraulic motors P2 LS line general relief valve of output circuit P2 = P1 + margin of 30 bar Each TXV pump is supplied with a booklet of recommendations for installation and set-up of this pump, and examples of various mounting configurations in truck applications.

7 TXV 40 to 120 & TXV 130 TXV 40 to 120 LS setting Stand-by setting Standard set at the factory : 30 bar Can be set at up to 40 bar If > 40 bar required, please contact us. PC setting Cancellation pressure setting (maximum 400 bar) Drain G 3/8 LS G 1/4 143 Ø80 F7 Splines DIN ISO14 NF E direction of rotation F M xØ View from F View from F TXV connections Pump Outlet pressure Inlet A B (Ø) (Ø) (mm) (mm) TXV and DELTA 40 to 92 G3/ G1 1/2 TXV 120 G Intlet Drain G 3/8 36 Outlet P 29 A 7 B TXV 130 Drain G 3/8 LS setting Stand-by setting Standard set at the factory : 30 bar Can be set at up to 40 bar If > 40 bar required, LS G1/4 please contact us. Drain G 3/8 PC setting Cancellation pressure setting (maximum 400 bar) 58 Drain G 3/8 80 Splines DIN ISO 14 NF E Outlet G1 Inlet G1 1/2 Ø79.95 Ø M Connection for pressure gauge G 1/ holes Ø12.75

8 TXV main characteristics Choice of fluid: Generally fluid ould be mineral based hydraulic fluid, of ISO class 32, 46 or 68, depending on temperature conditions, so as to ensure correct operating viscosity of between 10 and 400 cst. Filtration ould be 20 μ, or fluid cleanliness in conformity with class 18/13 of ISO standard TXV 40 TXV 60 TXV 75 TXV 92 TXV 120 TXV 130 Pump Direction of rotation Displacement (1) (cc) Maximum operating pressure (bar) Maximum peak pressure (intermittent : 5%) (bar) Maximum operating pressure at flow-cancellation (bar) Max torque at 300 bar (Nm) Max speed (2) (rpm) (1) TXV pumps can be set for smaller maximum displacements: please contact us. (2) Higher speed possible depending on flow required : please contact us. Viscosity affects maximum possible rotating speed. If viscosity > 100 cst, please contact us to obtain corresponding speed possibilities. Maximum temperature: 80 C. Mass: - TXV 40 to kg. - TXV kg. Overhang torque for all TXV models, complete with standard control device: = 35 mn. Recommendations To ensure optimal pump efficiency, a supply line of minumum diameter 50 mm is recommended. Correct operation of the pump requires an LS line with diameter for fluid passage = 6 mm and a drain line with diameter for fluid passage = 10 mm. In all cases, the connecting lines ould be of minimum length. The TXV environment : truck applications The pump is the heart of your hydraulic system. We would remind you that the pump s longevity and its technical performance during operation depend directly on the working environment. This environment is essentially made up of: the PTO : speed, ratio and torque; the tank: capacity, position etc. the fluid: type of fluid, cleanliness; the way the pump is used: type of application, duty cycle etc. For advice on defining the right environment for the pump, please do not hesitate to contact us.

9 performances Absorbed torque at maximum displacement m.dan Torque Calculating power as a function of torque C = P (kw) x 100 = m.dan = P (kw) N = P Q bar Theoretical hydraulic power where: N = speed in rpm ΔP = working pressure in bar Q = flow in l/minute Flow Flow (l/min.) Graph of flow as a function of speed, displacement and inlet pressure. These graphs are the results of tests carried out by the HYDRO LEDUC Research Laboratory, on a specific test bench, with ISO 46 fluid at 25 C (100 cst), a 50mm diameter supply line 1.5 m long, and a tank with oil level at the same height as the pump N (rpm) Volumetric efficiency Ideal installation % 100 Efficiency at 1,500 rpm Tank above the pump bar

10 cylindrée variable Flow- pressure control (LS) Zero flow (stand-by) LS signal Filter 20 μ abs T LS Flow control LS signal Filter 20 μ abs T LS 10 Full flow LS signal Filter 20 μ abs T LS Zero flow (maximum press) LS signal Filter 20 μ abs T PC setting LS Drainage LS P setting LS inlet

11 other products Piston pumps for industrial applications DELTA X MX M Piston pumps for trucks HYDRO LEDUC offers 3 types of piston pumps perfectly suited to all truck, construction equipment, and PTO mount applications. PA PAC MXR Bent axis hydraulic motors Hydraulic piston motors with fixed displacement, based on the bent axis technology.model from 18 to cc, available in DIN and SAE version. MSI micro-hydraulics This is a field of exceptional HYDRO LEDUC know-how: axial and radial piston pumps, of fixed and variable displacement, axial piston micro-hydraulic motors, micro-hydraulic units incorporating pump, electric motors, valving, controls, etc. To users of hydraulic components which have to be housed in extremely small spaces, HYDRO LEDUC offers complete, original and reliable solutions for even the most difficult environments. we are passionate about hydraulics hydro-pneumatical accumulators Bladder, diaphragm and piston accumulators. Spherical and cylindrical accumulators. Volume capacities from 20 cl to 50 litres. Pressures up to 500 bar. Accessories for use with hydraulic accumulators. A dedicated R&D team means HYDRO LEDUC is able to adapt or create products to meet specific customer requirements. Working in close cooperation with the decision-making teams of its customers, HYDRO LEDUC optimises proposals based on the specifications submitted.

12 a passion for hydraulics HYDRO LEDUC SAS with capital of euros Siret RC Nancy B mail@hydroleduc.com HYDRO LEDUC Head office and factory BP 9 - F AZERAILLES (FRANCE) Tél. +33 (0) Fax +33 (0) HYDRO LEDUC GmbH Haselwander Str. 5 D SCHUTTERWALD (ALLEMAGNE) Tel. +49 (0) Fax +49 (0) HYDRO LEDUC L.P Briar Hills Parkway - Suite 116 HOUSTON, TEXAS (USA) Tel Fax Complets catalogues available at: 11/ The information is given as rough guide. Not contractual document. Cancels and replaces previous version. Editech.com