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What is the difference between hydraulic pump and hydraulic motor?

放大word体  缩小word体 Release date:2018-11-15  来源:China Hydraulic parts net  作者:China Hydraulic parts net  Views:34
Core Tip:Hydraulic pump and hydraulic motor are indispensable hydraulic components on each excavator, and their structure and working principle are very similar. Sometimes, Xiaobai outside some industries will confuse these two things. Some people say that hydraul
      Hydraulic pump and hydraulic motor are indispensable hydraulic components on each excavator, and their structure and working principle are very similar. Sometimes, Xiaobai outside some industries will confuse these two things. Some people say that hydraulic pumps and motors are like a couple of lovers, one attacking and the other suffering; others say that hydraulic pumps and motors are like generators and motors, two positions of identity. Is this description correct? What is the difference between them?
 
      The similarities between hydraulic motor and hydraulic pump are as follows:
 
      (1) In principle, hydraulic motors and pumps are reversible, if driven by motors, the output is hydraulic energy (pressure and flow), which is hydraulic pump; if the pressure oil is input, the output is mechanical energy (torque and speed), it becomes a hydraulic motor.
 
      (2) from the structural point of view, the two are similar.
 
      (3) from the point of view of the working principle, the two of them use the change of the sealing working volume to absorb oil and drain oil. For hydraulic pumps, when the working volume increases, oil absorption and working volume decrease, and high pressure oil is discharged. For hydraulic motors, when the working volume increases, they enter high pressure oil, and the working volume decreases, and the low pressure oil is discharged. The difference between hydraulic motor and hydraulic pump is:
 
      (1) the hydraulic pump is an energy device, and the hydraulic motor is the executive element. Hydraulic pump is a device that converts mechanical energy of motor into hydraulic energy, and outputs flow and pressure, hoping for high volume efficiency; Hydraulic motor is a device that converts pressure energy of liquid into mechanical energy, outputs torque and speed, hoping for high mechanical efficiency.
 
      (2) The rotation of the output shaft of the hydraulic motor must be positive and reverse, so its structure is symmetrical; while some hydraulic pumps (such as gear pumps, vane pumps, etc.) have clear steering regulations, which can only rotate in one direction, and can not change the direction of rotation at will.
 
      (3) In addition to the inlet and outlet of the hydraulic motor, there are separate oil leakage outlets; in general, only the inlet and outlet of the hydraulic pump (except the axial plunger pump), and the oil leakage in the hydraulic motor is connected with the inlet.
 
      (4) the volumetric efficiency of the hydraulic motor is lower than that of the hydraulic pump.
 
      (5) usually the working speed of the hydraulic pump is relatively high, and the output speed of the hydraulic motor is low. In addition, the suction port of gear pump is large and the discharge port is small, while the suction port and discharge port of gear hydraulic motor are the same size.

      Readers who read here hope that this article from Xiaobian can bring you a new understanding. If you want more hydraulic information, please continue to pay attention to China Hydraulic Parts Network and China Hydraulic Parts Mall. Xiaobian also updates the relevant information of hydraulic components everyday. If you have any suggestions to us, we will make corresponding supplement and optimization to the content according to your opinions, please support us more!

 
 
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