Which Is Better, Gear Pump Or Plunger Pump?

1. When high pressure is required, plunger pump is usually a better choice, while gear pump is more suitable when pressure requirement is not high. This choice is not fixed and should be determined according to specific needs.
2. The advantages of axial piston pump include: it can provide high pressure output, has a variety of optional variable forms, has high requirements for the cleanliness of hydraulic oil, can maintain constant flow in principle, and is suitable for various speeds.
3. The performance characteristics of plunger pump are: it can achieve high pressure, forced circulation, and the outlet will not be blocked.
4. Gear pump also has high pressure type, the cleanliness requirement of hydraulic oil is not as high as plunger pump, it can work normally under the condition of speed change, and it is not sensitive to oil pollution.
5. The pressure lifting capacity of gear pump is limited, generally not exceeding 21Mpa, which is determined by its structure. Its structure originated from the United States, and its advantages are simple structure, easy maintenance, and insensitivity to oil pollution.
6. If applied to a system with a pressure of about 21Mpa, gear pump is a good choice.
7. The hydraulic gear pump delivers liquid or increases pressure through the change and movement of the working volume between the pump cylinder and the meshing gear. This is a rotary pump.
8. The structural feature of the external meshing double gear pump is that the meshing gears and pump cylinder separate the suction chamber and the discharge chamber.
9. When the gear rotates, the volume between the teeth at the place where the teeth on the suction chamber side disengage from each other increases, the pressure decreases, and the liquid enters the teeth under the action of the pressure difference.
10. The working principle of the axial piston pump is to use the volume change caused by the reciprocating motion of the plunger parallel to the transmission shaft in the plunger hole to work.
11. Since the plunger and the plunger hole are both circular parts, and high-precision wheel crack matching can be achieved during processing, the volumetric efficiency is relatively high.
12. When considering the matching use of the power station and the hydraulic oil casing pliers, since the cleanliness of the hydraulic oil cannot be guaranteed, it is easy to be contaminated when used in a closed environment. Even tiny particles can cause wear to the plunger and plunger hole of the plunger pump. Once the sealing surface is damaged, the plunger pump or plunger needs to be replaced. Therefore, the use of plunger pumps is not recommended.