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What is Hydraulic Motor

A hydraulic motor is a mechanical actuator that converts hydraulic pressure and flow into rotational motion. It works on the principle of using pressurized hydraulic fluid to drive its internal components, usually a set of gears, pistons, or vanes.Hydraulic motors are widely used in heavy - duty machinery such as construction equipment and agricultural machinery. They provide high torque output, allowing for the movement of heavy loads. Their speed can be controlled by adjusting the flow rate of the hydraulic fluid, making them a versatile power source for many applications.

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Your Professional Hydraulic Motor Supplier！

Hangzhou Pinxin Hydraulic Technology Co., Ltd. is an excellent enterprise specializing in hydraulic component trade, hydraulic system design and hydraulic transmission. The company has factories in Hangzhou, Shanghai, Nanjing and Hefei. Its main business areas are various types of engineering machinery and equipment, large industrial equipment and marine engineering.

Wide Range Of Products

Our company is committed to providing Rexroth brand hydraulic pumps, hydraulic motors, reducer assemblies, control valves, accessories, gear pumps and gear motors to the mid- and aftermarket.

After-sales Service

The product provides a one-year warranty service, 24-hour remote video technical guidance on weekdays, and free parts repair, grease injection, and cleaning under normal use during the warranty period.

OEM and ODM Available

We can customize and design products according to customer needs.

Quality Assurance

Our products have passed CE, RoHS and other certifications.

Product features of hydraulic motors

High Power Density
Hydraulic motors can provide high power output in a relatively small volume, suitable for occasions with limited space.

High Torque
Hydraulic motors can produce high torque, especially at low speeds, suitable for applications requiring heavy loads and high starting torque.

Smooth Operation
Hydraulic motors run smoothly and have low vibrations, suitable for equipment with high requirements for operating quality.

Good Speed Regulation Performance
By adjusting the hydraulic flow, flexible control of speed and torque can be achieved to meet the needs of different working conditions.

Strong durability

Hydraulic motors usually have a long service life with proper maintenance and can work stably in harsh environments.

Self-cooling characteristics

Since the working oil removes heat during flow, the hydraulic motor can maintain good heat dissipation performance during continuous operation.

Simple maintenance

Hydraulic motors are usually designed to be easy to repair and replace parts, making maintenance relatively simple.

Components of hydraulic motors

Cylinder: It is a component in the hydraulic motor that contains the plunger and forms a sealed cavity with it. It is usually highly precise and wear-resistant.

Plunger: It reciprocates in the cylinder and forms a sealed volume change with the cylinder, thereby realizing the conversion of hydraulic energy.

Oil Distribution Plate: It is used to distribute the channel for high-pressure oil to enter and flow out of the plunger cavity to ensure the normal operation of the hydraulic motor.

Return Plate (Or Pressure Plate): It guides and supports the return of the plunger during the movement of the plunger.

Spindle: It is the output component of the hydraulic motor. Through the eccentric design, the reciprocating motion of the plunger is converted into rotational motion and output torque.

In addition, the hydraulic motor may also include other auxiliary components, such as seals, bearings, flanges, etc., to improve the sealing, stability and connectivity of the motor.

Application of hydraulic motors

Engineering Machinery

Hydraulic motors are often used in engineering machinery such as excavators, loaders, cranes, etc. to drive their rotating or moving parts.

Agricultural Machinery

In agricultural machinery, such as tractors, plant protection drones, harvesters, etc., hydraulic motors are used to drive various agricultural equipment to improve work efficiency.

Mining Equipment

Hydraulic motors can be used in equipment used in mining, such as mine cars, crushers, and screening machines, to provide powerful power output.

Manufacturing Industry

In some manufacturing equipment and automated production lines, hydraulic motors can drive conveyor belts, robot arms, and other machinery to improve production efficiency.

Shipbuilding Industry

Hydraulic motors are used in auxiliary power systems of ships, such as steering gears, engine cooling systems, etc.

Working principle of hydraulic motor

A6VE055EP200P000E/65MWV0P2Z62BV-0 Hydraulic Motor of Rexroth for Rotary Drilling Rig/Power Head Motor in Stock

Hydraulic oil input

Hydraulic oil enters the oil inlet of the motor through the pipeline.

A4FM28/32W-NSC02-S Hydraulic Motor of Rexroth in Stock

Power conversion

The pressure of the hydraulic oil pushes the internal rotating parts. The specific design can be vane type, gear type or piston type, etc.

A2FM63/61W-VBB100 Hydraulic Motor of Rexroth for Hoisting Machinery in Stock

Energy output

The rotating part is connected to the external load, outputs the corresponding torque and speed, and completes the mechanical work.

A2FM45/61W-VAB026D Hydraulic Motor of Rexroth for Hoisting Machinery in Stock

Oil return

The used hydraulic oil returns to the oil tank through the oil return port for the next cycle.

Common types of hydraulic motors

Gear Motor
Power conversion is achieved through the rotation of gears. It has a simple structure and low cost, and is suitable for most applications.

Vane Motor
The movement of blades on the rotor is used to achieve rotation. It has high torque and good efficiency and is suitable for low-speed and high-torque applications.

Piston Motor
The reciprocating motion of the piston is converted into rotational motion. It has high efficiency and is suitable for high-pressure and high-torque working environments.

Screw Motor
The spiral rotor is used to achieve axial movement of the fluid. It has good sealing performance and efficiency and is suitable for use in harsh environments.

Swing Motor
Rotation is achieved through swinging motion. It is usually used in situations where large torque is required, such as heavy machinery such as excavators.

Customization of hydraulic motors

Purpose And Working Environment

Different applications have different requirements for hydraulic motors.

Type Selection

Hydraulic motors are mainly divided into gear motors, vane motors and plunger motors. Choose the appropriate type according to the nature of the work and efficiency requirements.

Technical Parameters

Power: Determine the power according to the needs of the drive equipment.
Speed: Select according to the use environment and the speed to be achieved.
Torque: Ensure that the motor can provide sufficient torque under specific conditions.
Pressure: Select the appropriate working pressure range.

Size And Interface

Customize the size, interface type and position of the motor according to the installation space and connection requirements.

Material Selection

Choose the appropriate material according to the working environment (such as temperature, humidity, corrosiveness, etc.) to ensure the durability and reliability of the motor.

Sample And Design Confirmation

Suppliers usually provide samples or design solutions according to your needs. At this time, you need to confirm whether these solutions meet your specific requirements.

Production And Delivery

After confirming the solution, the supplier will start to produce the customized hydraulic motor and deliver it within the agreed time.

Installation And Commissioning

After receiving the customized hydraulic motor, installation and commissioning are required to ensure that the performance of the hydraulic motor in actual application meets the expected performance.

After-sales Service

Provide customized commissioning, maintenance and technical support services to ensure the reliability and efficiency of hydraulic motors during use.

Frequently Asked Questions

Q: What should I do if the hydraulic motor torque is insufficient? ‌

A: Possible reasons include insufficient oil supply from the hydraulic pump, excessive oil viscosity, low motor speed, etc. Solutions include cleaning the oil filter, replacing the appropriate oil, adjusting the motor speed, etc. ‌

Q: What should I do if the hydraulic motor speed is unstable? ‌

A: Unstable speed may be related to insufficient output oil pressure of the hydraulic pump, improper pressure adjustment of the overflow valve, or failure. The hydraulic pump and overflow valve should be checked and adjusted to ensure stable oil pressure and pressure. ‌

Q: What should I do if the hydraulic motor has poor load capacity? ‌

A: Poor load capacity may be related to wear of internal parts of the hydraulic motor, poor sealing, or oil contamination. The worn parts should be checked and replaced, the seal should be strengthened, and the oil tank and oil filter should be cleaned. ‌‌

Q: What should I do if the hydraulic motor vibrates severely? ‌

A: Severe vibration may be related to wear of the internal parts of the hydraulic motor, external vibration or oil contamination. The worn parts should be checked and replaced, external vibration should be reduced, and the oil tank and oil filter should be cleaned. ‌

Q: What should I do if the hydraulic motor leaks oil? ‌

A: Oil leakage is usually caused by aging or damage of the seal. The damaged seal should be checked and replaced to ensure the sealing performance. ‌

Q: What should I do if the hydraulic motor temperature is too high? ‌

A: Excessive temperature may be caused by excessive system pressure, insufficient lubricating oil or oil contamination. The system pressure should be adjusted, the lubricating oil should be replenished regularly, and the oil tank and oil filter should be cleaned. ‌‌

Q: What should I do if the hydraulic motor brake operation is ineffective? ‌

A: Ineffective brake operation may be related to friction plate wear, spring breakage or oil contamination. The friction plate and spring should be checked and replaced, and the oil tank and oil filter should be cleaned. ‌

Q: What should I do if the hydraulic motor cannot change from high speed to low speed? ‌

A: It may be that the valve core of the pilot valve is fixed. The pilot valve part should be checked and repaired. ‌

Q: What should I do if the output power of the hydraulic motor decreases? ‌

A: The decrease in output power may be related to oil contamination, part wear or poor sealing. The oil tank and oil filter should be cleaned, the worn parts should be replaced, and the seal should be strengthened. ‌

Q: What should I do if the internal parts of the hydraulic motor are worn and damaged? ‌

A: Worn and damaged parts should be checked and replaced to ensure that the internal parts of the hydraulic motor are intact.

We're well-known as one of the leading hydraulic motor manufacturers and suppliers in China. Please rest assured to wholesale custom made hydraulic motor from our factory. Contact us for more cheap products.