Some Introduction To Omp Hydraulic Motor


As a part of the hydraulic system, the hydraulic motor may not be very clear about its function and classification. Today, we will introduce you some basic knowledge about the hydraulic motor. I hope this will help those who need to choose to buy or want to know about the hydraulic motor. You will be helpful.

Omp Hydraulic Motor, also known as oil motors, are mainly used in injection molding machinery, ships, hoists, construction machinery, construction machinery, coal mining machinery, mining machinery, metallurgical machinery, marine machinery, petrochemicals, port machinery, etc.

The high-speed motor gear motor has the advantages of small size, light weight, simple structure, good manufacturability, insensitivity to oil pollution, impact resistance and low inertia. The disadvantages are large torque pulsation, low efficiency, small starting torque (only 60%-70% of the rated torque) and poor low-speed stability.

There are also many classifications of hydraulic motors. According to their structure, they are mainly divided into vane type, radial piston type, axial piston motor, gear motor, high-speed motor and low-speed motor. Among them, the radial plunger type can also be subdivided into single-acting connecting rod type and multi-acting inner curve type. They each have their own advantages and disadvantages. I will not go into details here. For more information, please visit our official website

Next, let me introduce the basic parameters of the hydraulic motor to you.

1. Working pressure and rated pressure

Working pressure: Enter the actual pressure of the motor oil, which depends on the load of the motor. The difference between the inlet pressure and the outlet pressure of the motor is called the differential pressure of the motor. Rated pressure: according to the test standard, the pressure to make the motor work normally and continuously.

2. Displacement and Flow

Displacement: The volume of liquid required to be input for each revolution of the hydraulic motor without considering leakage. Vm (m3/rad) flow: the flow without leakage is called the theoretical flow qMt, and the leakage flow is considered as the actual flow qM.

3. Volumetric Efficiency and Speed

Volumetric efficiency ηMv: the ratio of the actual input flow to the theoretical input flow.

4. Torque and Mechanical Efficiency

The output power is equal to the input power without taking into account the loss of the motor. Actual torque T: The loss torque ΔT is generated due to the actual mechanical loss of the motor, which is smaller than the theoretical torque Tt, that is, the mechanical efficiency of the motor ηMm: equal to the ratio of the actual output torque of the motor to the theoretical output torque.

5. Power and Overall Efficiency

The actual input power of the motor is pqM, and the actual output power is Tω. The total efficiency of the motor ηM: the ratio of the actual output power to the actual input power. The hydraulic motor has two circuits: the hydraulic motor series circuit and the hydraulic motor brake circuit, and these two circuits can be classified into the next level. The hydraulic motor series One of the circuits: connect three hydraulic motors in series with each other, and use a reversing valve to control their start, stop and steering. The flow through the three motors is basically the same. When the displacement is the same, the speed of each motor is basically the same. The oil supply pressure of the hydraulic pump is required to be higher, and the flow rate of the pump can be smaller. It is generally used in light-load and high-speed situations. . The second hydraulic motor series circuit: each reversing valve in this circuit controls a motor, each motor can act independently or at the same time, and the steering of each motor is also arbitrary. The oil supply pressure of the hydraulic pump is the sum of the working pressure difference of each motor, which is suitable for high-speed and low-torque applications. One of the hydraulic motor parallel circuits: The two hydraulic motors are controlled by their respective reversing valves and speed regulating valves, which can run simultaneously and independently, and can adjust the speed separately, and the speed can be basically unchanged.

However, with throttling speed regulation, the power loss is relatively large. The two motors have their own working pressure differences, and their speed depends on the flow through which they pass. The second hydraulic motor parallel circuit: the shafts of the two hydraulic motors are rigidly connected together. When the reversing valve 3 is in the left position, the motor 2 can only idle with the motor 1, and only the motor 1 outputs torque. If the output torque of the motor 1 cannot meet the load requirement, put the valve 3 in the right position. At this time, although the torque increases, the rotational speed should decrease accordingly. Hydraulic motor series-parallel circuit: when solenoid valve 1 is energized, hydraulic motor 2 and 3 are connected in series, and when solenoid valve 1 is powered off, motors 2 and 3 are connected in parallel. When connected in series, the two motors pass the same flow, and the rotational speed is higher than when connected in parallel, while when the two motors are connected in parallel, the working pressure difference is the same, but the rotational speed is lower.

Well, that's all for our introduction to hydraulic motors. For more inquiries, please pay attention to our subsequent articles. We will explain specific products and enrich you with more knowledge about hydraulic motors. Finally, what I must say is: buy a hydraulic motor, choose Hanjiu Technology! Hanjiu Technology can not only give you a reliable experience in product quality, but also let you experience the surprise that customers are God in terms of service attitude!


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