How to choose the right hydraulic motor according to the work demand?

2018-07-28

To choose the right hydraulic motor according to the work needs, you need to consider the following key factors:

1. Workload characteristics

The size and range of the load: If the load is large and stable, such as the lifting mechanism of a large crane, it may be necessary to use a plunger hydraulic motor because it can provide a large torque. If the load is small and changes frequently, such as some small automation equipment, gear or vane type motor may be more suitable.
Inertia of the load: For systems with large inertial loads, it is necessary to choose a motor with sufficient overload capacity and cushioning performance to avoid impact and damage.

2. Speed requirements

Required operating speed range: If high-speed rotation is required, such as the spindle drive of some processing machines, it may be necessary to choose a motor with better high-speed performance, such as vane type or axial piston type. For low-speed and high-torque applications, such as winch drum drives, radial piston motors may be a better choice.
Speed stability and accuracy: some of the speed accuracy and stability requirements of high occasions, such as precision indexing device, need to choose superior performance variable motor, and equipped with accurate speed control and control device.

3. Working environment

Temperature and humidity conditions: When working in high temperature, high humidity or harsh environments, it is necessary to choose a motor with good protection and sealing performance to prevent hydraulic oil from deteriorating and component damage.
Space constraints: If the installation space is limited, you should choose a small, compact motor model.

4. System pressure and flow

Pressure and flow provided by the system: The performance of the hydraulic motor is closely related to the pressure and flow of the system. It should be ensured that the selected motor can work normally within the given pressure and flow range of the system and achieve the expected performance indicators.
Stability of pressure and flow: If the system pressure and flow fluctuate greatly, you need to choose a motor type that is adaptable to pressure and flow changes.

5. Efficiency and Economy

Consider the total efficiency of the motor: including mechanical efficiency and volumetric efficiency to ensure that the energy loss of the system during operation is minimized and operating costs are reduced.
Cost factor: The price of hydraulic motors of different types and specifications varies greatly. On the premise of meeting the needs of the work, products with high cost performance should be selected.

For example, the mixing mechanism of a concrete mixer truck on a construction site usually selects a radial piston hydraulic motor due to a large load, a relatively low speed, and a harsh working environment. In some small automated production lines, for driving small rotating parts, due to limited space, small load and low speed accuracy requirements, gear hydraulic motors may be used.