Advantages and Disadvantages of Common Oil Pumps in Hydraulic Bending Machine

As a hydraulic device, the interior of the Hydraulic press brake bending machine is equipped with the corresponding hydraulic oil pump, which has many types, so what kind of oil pump is often applied in a hydraulic bending machine among gear pump, screw pump, vane pump, plunger pump and so on?

The gear pump used in a hydraulic bending machine is simple in structure, good in technology, small in volume, light in weight, easy to maintain and long service life. However, the working pressure is low, while the flow pulsation and pressure pulsation are large, so the volumetric efficiency of hydraulic bending machine will obviously decrease under high pressure without end compensation.

The screw pump used in a hydraulic bending machine is also a kind of gear pump, which is simple in structure and light in weight. Flow and pressure pulsations are small, conveying even, without turbulence and stirring, and rarely bubbles produced. The work is reliable with small noise and so on, and its operation smoothness is higher than the gear pump and the blade pump, with high volume efficiency and high suction head. But the insufficient is its difficult processing which cannot change its flow.

Single-acting vane pump of hydraulic bending machine has a discharge of oil and an oil suction mouth. When the rotor rotates one time, each volume between the two pieces of conduct suction and discharge of the oil at one time. If in structure the eccentricity of the rotor and stator is made into a variable, that is the variable vane pump. It will satisfy the low pressure and large traffic situations.

Plunger pump has the advantages of high precision, good sealing performance, and high working pressure, so it has been widely used in a hydraulic bending machine. But it also has the disadvantages of quite complex structure,high operation precision and expensive price. Also, it is sensitive to oil pollution, so there is still room for improvement.

There are much more notes about the hydraulic bending machine on our website at GLDMA.com.

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