Selection and Disassembly/Assembly Considerations for Hydraulic Motors

 1. Selection of Hydraulic Motor

Selection of hydraulic motors, first of all, according to the working characteristics of the Hydraulic System to choose the type, and then according to the requirements of the output torque and speed to choose the appropriate type and specifications.

Generally speaking, the gear motor structure is simple, inexpensive, commonly used in high speed, low torque and smooth movement requirements are not high occasions. For example: drive grinding machine, fan, etc..

Vane motor rotational inertia is small, sensitive action, but the volumetric efficiency is not high, the mechanical characteristics of the soft, suitable for more than medium speed, torque is not large, the requirements of the startup, frequent change of direction of the occasion. For example: the drive of grinding machine table, machine tool manipulation system.

Axial piston motor has high volumetric efficiency, large speed range, and good low-speed stability, but the impact resistance is a little worse, commonly used in High Pressure systems with high requirements. For example: the main drive of internal combustion locomotives, lifting machinery, construction machinery, mining machinery and ships, such as lifting, slewing and other hydraulic systems.

The use of low-speed high-torque radial piston motor, there is no longer a need for gearboxes, can be directly driven crane winches, walking machinery wheels.

  2. Hydraulic motor disAssembly

  (1) within the curve of the hydraulic motor, for example, need to understand the following issues:

① within the curve of the hydraulic motor parts of the typical structure;

② the function of the components of the motor in the curve;

 ③ the use of flow distribution devices and in and out of the oil flow route;

④ Tangential force transmission mechanism;

⑤ The number of stator surfaces, the number of plunger holes and the number of holes in the flow distribution window and their corresponding relationships.

  (2) Matters to be noted during Disassembly and assembly

① Record the order and direction of disassembly of components and disassembled parts;

② The disassembled parts should not fall to the ground, not scratched, not rusted;

③ Specialized tools are required for disassembling individual parts, such as bearing driver for disassembling bearings and internal calipers for disassembling snap rings;

④ When it is necessary to knock a certain part, please use a copper rod, do not use a fuller or steel rod;

⑤ Before installation, deburr the components, clean them with kerosene and dry them, never dry them with cotton yarn;

⑥Check the seals for aging, if so, replace with new ones;

 ⑦ Do not install the parts reverse, pay attention to the installation position of the parts, some parts have positioning slot holes, must be aligned;

⑧ installation is completed to check the site for any missing components.