The importance of the pump in the hydraulic system
The importance of the pump in the hydraulic system is self-evident. Because it is the source of power. It is the point of the hydraulic oil energy conversion of the station. Is an important power of ensure smooth running of the whole hydraulic system components.
So to make our machine running stability, excellent mechanical properties we have to understand the basic knowledge of hydraulic pump.
First: the basic condition of hydraulic pump work
1. To have good sealing capacity and volume size can change the airtight cubage.
2. Periodically, the motion of the enclosed volume size to do periodic changes (changed from small to big volume in the hydraulic pump to oil absorption, smaller volume and big to discharge of oil)
3. With flow organization, airtight volume increases to limit will be separated and oil absorption cavity first and then converted to discharge of oil, airtight cubage reduce to limit will be separated and discharge of oil cavity discharge of oil first. Single plunger pump is through two one-way valve to implement this requirement.
Second, we need to understand the working characteristics of hydraulic pump.
1. The oil pressure and oil absorption cavity is separated from each other and have good sealing (i.e., can achieve very high work pressure)
2. The oil absorption cavity enlarge suction liquid pressure oil cavity volume shrinking ruled out (positive displacement pump through the fluid movement of the centrifugal force will be flung in a oil)
In our daily work, the species has a lot of its classification of the pump has the following form:
1. According to the shape and movements of the moving parts can be divided into: the gear pump, vane pump, plunger pump, screw pump and the gear pump is divided into external gear pump and the internal gear pump. Vane pump is divided into double-acting vane pump and single-acting vane pump. Radial piston pump and plunger pump is divided into axial plunger pump.
2. According to the displacement can be variable hydraulic pump can be divided into quantitative pump and variable pump, the radial and axial plunger pump plunger pump can be used as a variable pump.
In addition, because of various hydraulic pump has its own characteristics so we consider when choosing hydraulic pump of the basic choice. So that we can better work and operation.
Its basic principle is: we had better choose in daily work variable pump and high pressure (high pressure rating of the plunger pump), we used in the work environment polluting better gear pump also has a lot of. If according to the noise resistance, vane pump and screw pump is also very good, but the overall efficiency of the highest axial plunger pump.