35M Series Hydraulic Vane Motor
4 week ago
Product details
1. Basic Product Positioning
The 35M Series is a classic medium-pressure hydraulic fixed-displacement vane motor from Eaton Vickers M Series. It enjoys high industry universality, and many domestic manufacturers have launched fully interchangeable domestic alternatives. It is widely applied in medium-speed and medium-torque hydraulic drive scenarios for its stable operation, sensitive rotation reversal and easy maintenance.
2. Model Code Explanation (taking the popular model 35M115A311B20 as an example)
Code Segment Description
35M Product series code, medium-size specification of the M-series vane motor
115 Displacement code, corresponding to a theoretical displacement of 121.9mL/r; three standard displacements of 83.6, 100.3 and 121.9 mL/r are available for this series
A Port type: SAE standard 4-bolt flange ports
311 Code for output shaft structure and mounting orientation
B Layout orientation of inlet and outlet ports
20 Revised version number of product structure
3. Core Technical Parameters
1. Displacement options: 83.6 / 100.3 / 121.9 mL/rev
2. Pressure ratings
- Continuous operating pressure: 155 bar (2250 psi)
- Intermittent peak pressure: 172 bar (2500 psi)
3. Speed range
- Stable continuous operating speed: 400～3600 rpm
- Short-term maximum limiting speed: 4000 rpm
4. Torque characteristics: Torque increases linearly with displacement and working pressure, featuring small torque fluctuation at low speeds and consistent performance for forward and reverse rotation
5. Structure design: Symmetrical double port plate structure achieves radial hydraulic balance for the rotor, reducing vane wear and maintaining high volumetric efficiency
4. Structural Advantages
1. Symmetrical double port plates offset radial loads, greatly lowering friction between vanes and stator inner walls to reduce operating noise and extend service life
2. The low-inertia rotor delivers fast start-stop response and smooth forward/reverse switching without obvious jitter at low speeds
3. Modular split structure allows easy disassembly and replacement of wearing parts such as vanes and port plates, cutting long-term maintenance costs
4. Both flange and foot mounting methods are supported; flat key shafts and splined shafts are optional for output shafts to fit various transmission connections like couplings and winch drums
5. It has a more compact size than piston motors under the same torque output, saving equipment installation space
5. Main Application Fields
- Mobile construction machinery: crane winches, compact loaders, slewing systems of aerial work platforms
- General industrial equipment: belt conveyors, auxiliary drives for injection molding machines, transmission of metallurgical roller tables
- Marine equipment: marine winches, drive units for deck hydraulic machinery
- Agricultural and forestry machinery: conveying systems of harvesters, hydraulic power systems for logging equipment
6. Interchangeability Instructions
The original design belongs to Eaton Vickers. Multiple domestic hydraulic manufacturers produce fully interchangeable replacement products with identical flange dimensions, port specifications, shaft parameters and hydraulic performance for direct drop-in replacement. Only three key parameters need to be confirmed for purchasing: displacement code, output shaft type and port orientation.
7. Operation and Maintenance Specifications
1. ISO VG46 anti-wear hydraulic oil is recommended, and operating oil temperature shall be kept between 30℃ and 60℃
2. A 10μm precision oil filter shall be installed at the motor inlet to prevent foreign particles from jamming vanes and causing faults
3. Sudden high-pressure impact shall be avoided during start and stop; a torque safety margin of no less than 20% is suggested for heavy-load working conditions
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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