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Related Manuals for Danfoss LPV
Summary of Contents for Danfoss LPV
- Page 1 Technical Information Axial Piston Pumps powersolutions.danfoss.com...
- Page 2 Technical Information LPV Axial Piston Pumps Revision history Table of revisions Date Changed September 2017 update model code 0102 July 2015 Danfoss Layout 0100 January 2009 neutral assist return mechanism - changes October 2008 added serial number plate drawing April 2008...
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Page 3: Table Of Contents
Technical Information LPV Axial Piston Pumps Contents General description Overview......................................4 Design........................................4 Typical applications..................................4 LPV product specifications................................4 Design........................................6 Direct displacement drive system.............................. 7 LPV Pump schematic diagram..............................7 Operating parameters Overview......................................8 Input speed......................................8 System pressure....................................8 Pressure Ratings....................................8 Viscosity....................................... 8 Temperature.......................................9 Case pressure..................................... 9 Independent braking system...............................9... -
Page 4: General Description
General description Overview LPV is a family of variable displacement, axial piston pumps for closed circuit applications. The LPV family is uniquely designed to optimize performance, size, and cost, matching the work requirements of the demanding turf care and utility vehicle marketplace. This document gives the detailed specifications and features for LPV pumps. - Page 5 Technical Information LPV Axial Piston Pumps General description LPV pump Serial number plate Model LPVAAADAEACCABDDD RAFFBNNN*** Code Part Number 83002847 Serial Number A084012345 Made in USA Place of Manufacture P107852 520L0954 | BC00000044en-US0102 | 5 © Danfoss | September 2017...
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Page 6: Design
General description Design LPV is a family of hydrostatic pumps for low to medium power applications with maximum loads of 345 bar [5000 psi]. You can apply these pumps with other products in a system to transfer and control hydraulic power. -
Page 7: Direct Displacement Drive System
P100586 The diagram shows an LPV pump driving an OMR motor. The system shown uses an external charge pump and external filter. Charge pressure relief valves, high pressure relief valves, and loop flushing valves are shown separated from the pump to provide clarity to the hydraulic system. -
Page 8: Operating Parameters
Technical Information LPV Axial Piston Pumps Operating parameters Overview This section defines the operating parameters and limitations for LPV pumps with regard to input speeds and pressures. For actual parameters, refer to Technical specifications on page 20. Input speed The table in... -
Page 9: Temperature
Technical Information LPV Axial Piston Pumps Operating parameters severe duty cycle operation. Maximum viscosity should only occur at cold start. Limit speeds until the system warms up. Refer to Specifications on page 20, for specifications. Temperature Maintain fluid temperature within the limits shown in the table. -
Page 10: System Design Parameters
Ensure the charge pump provides adequate flow for loop flushing and the loop flushing valve does not cause charge pressure to drop below recommended limits. LPV utilizes a special loop flushing spool design. On dual path systems, take special care to verify acceptable performance. - Page 11 If continuously applied external radial loads are 25% of the maximum allowable or more, or thrust loads are known to occur, contact your Danfoss representative for an evaluation of unit bearing life. Tapered output shafts or clamp-type couplings are recommended for applications where radial shaft side loads are present.
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Page 12: Hydraulic Unit Life
All pressure limits are differential pressures (referenced to charge pressure) and assume normal charge pressure. LPV pumps will meet satisfactory life expectancy if applied within the parameters specified in this bulletin. For more detailed information on hydraulic unit life see Pressure and Speed Limits, BLN-9884. -
Page 13: Input Shaft Torque Rating And Spline Lubrication
Contact your Danfoss representative for torque ratings if your application involves non oil-flooded couplings. Danfoss recommends mating splines adhere to ANSI B92.1-Class 5. Danfoss external splines are modified class 5 fillet root side fit. The external major diameter and circular tooth thickness dimensions are reduced to ensure a good clearance fit with the mating spline. -
Page 14: Sizing Equations
Technical Information LPV Axial Piston Pumps System design parameters elements from high to low pressure. Pulsations travel through the hydraulic lines at the speed of sound (about 1400 m/s [4600 ft/sec] in oil) until there is a change (such as an elbow) in the line. Amplitude varies with overall line length and position. -
Page 15: Filtration System
520L0467 for more information. Ensure fluid entering pump is free of contaminants to prevent damage (including premature wear) to the system. LPV pumps require system filtration capable of maintaining fluid cleanliness at ISO 4406-1999 class 22/18/13 or better. Consider these factors when selecting a system filter: •... -
Page 16: Charge Filtration
Filters used in charge pressure filtration circuits must be rated to at least 34.5 bar [500 psi] pressure. Danfoss recommends locating a 100 - 125 µm screen in the reservoir or in the charge inlet line when using charge pressure filtration. -
Page 17: Operation
The high pressure relief valve used on LPV is designed to remove pressure spikes for short periods of time. Operating over the high pressure relief valve for extended periods may damage the pump. -
Page 18: Loop Flushing Valve
LPV pumps incorporate an optional integral loop flushing valve, which removes heat and contaminants from the main loop. LPV utilizes a special loop flushing spool design. On dual path systems, take special care to verify acceptable performance. Loop flushing valve... - Page 19 Technical Information LPV Axial Piston Pumps Operation Neutral return adjustment screw Adjusting screw Lock/seal nut P106277 Neutral return mechanism Swashplate Shaft Neutral return Adjusting cam P106278 520L0954 | BC00000044en-US0102 | 19 © Danfoss | September 2017...
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Page 20: Technical Specifications
Main pressure ports: SAE straight thread O-ring boss Recommended installation Pump installation recommended with control position on the bottom or side. position Consult Danfoss for non conformance to these guidelines. The housing must always be filled with hydraulic fluid. Physical properties Displacement... - Page 21 Technical Information LPV Axial Piston Pumps Technical specifications Operating parameters (continued) Displacement Rating Units Case pressure rated bar [psi] 2 [29] maximum 6 [87] Sound levels dB(A) 100 bar [1450 psi] 200 bar [2900 psi] 300 bar [4350 psi] Displ. cm³ [in³]...
- Page 22 Technical Information LPV Axial Piston Pumps Technical specifications Mounting flange - G-factors for sample applications Application Continuous (vibratory) Maximum (shock) acceleration acceleration (G Skid steer loader Trencher (rubber tires) Asphalt paver Windrower Aerial lift Turf care vehicle Vibratory roller Applications experiencing extreme resonant vibrations may require additional pump support. Refer to System design parameters on page 10 for information concerning mounting flange loads.
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Page 23: Product Coding
Technical Information LPV Axial Piston Pumps Product coding LPV Model Code Product ■ ■ ■ ■ ■ □ □□ □ □ □□□ □□ □ □□ □ □□□ □□□ Product Code Description LPV variable displacement pump C Swashplate Group Code Description... - Page 24 Technical Information LPV Axial Piston Pumps Product coding H Charge Pressure Relief Valve Setting Code Description 11.0 bar [160 psi] 14.0 bar [200 psi] 18.0 bar [260 psi] 23.0 bar [335 psi] J End Cap and Loop Flushing Code Description High loop flushing, 7.6 l/min [2 US gal/min] at 260 psid charge, RH control, SAE A flange 0...
- Page 25 Technical Information LPV Axial Piston Pumps Product coding M System Pressure Protection (continued) Code Description 210 bar [3045 psi]/210 bar [3045 psi] 230 bar [3325 psi]/230 bar [3325 psi] 250 bar [3625 psi]/250 bar [3625 psi] 280 bar [4060 psi]/ 280 bar [4060 psi]...
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Page 26: Features And Options
Control lever movement changes the displacement and flow direction of the pump by increasing or decreasing the swashplate angle. The control input shaft is on the right hand side of the pump. Contact your Danfoss representative for availability of left side control input. -
Page 27: Input Shafts
Technical Information LPV Axial Piston Pumps Features and options Input shafts Shaft data Code Description Maximum torque Drawing N•m [lbf•in] 13 tooth spline 226 [2000] 41.2 ± 0.8 [1.622 ± 0.03] 16/32 pitch (ANSI B92.1 1966 - Class 6e) 15.2 ± 0.09 [0.5984 ±... -
Page 28: Auxiliary Mounting Pads
Technical Information LPV Axial Piston Pumps Features and options Auxiliary mounting pads SAE-A Auxiliary mounting Dimensions 1.96 1.96 [0.08] 44.73 [1.761] [0.08] 31.8 31.8 [1.25] [1.25] 20.1 [0.792] 19.77 16.47 [0.78] [0.65] 88.62 88.62 [3.49] [3.49] 15 [0.590] 13.5 [0.531]... - Page 29 [0.700] 31.75 [1.250] 17.78 [0.700] * The 11 tooth auxiliary pad option requires a special short shaft on the mating pump due to reduced clearance to the LPV pump shaft. 520L0954 | BC00000044en-US0102 | 29 © Danfoss | September 2017...
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Page 30: Installation Drawings
Technical Information LPV Axial Piston Pumps Installation drawings LPV Installation drawings 182.9 [7.20] 7/8 -14 128.8 SAE straight thread [5.07] 1 1/16 -12 O-ring boss SAE straight thread charge inlet O-ring boss Charge pressure case drain relief valve 39.2 [1.54] 246.3... -
Page 31: Lpv Schematic
Technical Information LPV Axial Piston Pumps Installation drawings Shaft rotation Handle angle Port flow HPRV valve 2X 73 [2.87] Bypass valve Loop flushing valve +0.25 2X Ø14.3 -0.12 [0.563 +0.010 -0.005 P106281 LPV Schematic Charge pressure inlet Port A Port B... - Page 32 Phone: +86 21 3418 5200 Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without changes being necessary in specifications already agreed.