The volumetric gear pump is a kind of quantitative pump, which produces a volume change output flow through gear meshing. Under the same material and pressure conditions, the volume of the gear pump depends on the radial dimension and the axial dimension. Through calculation, we draw conclusions. The radial dimension has a much greater influence on the overall volume of the gear pump than the axial dimension, while the radial dimension depends on the internal gear modulus. The smaller the modulus, the smaller the radial dimension. Therefore, reducing the internal gear modulus is an effective way to reduce the material consumption of the gear pump. In the case of performance, the gear pump design should prefer smaller analog gears. If the radial dimension is constant, the axial dimension of the TDY motorized drum mainly depends on the internal structure of the gear pump. At present, there are mainly two types of structures: floating sleeve type and floating side plate type. Because the thickness of the side plate is much smaller than the thickness of the sleeve, it should be Priority is given to the side panel structure.
According to the gear pump oil principle, periodic flow pulsations are generated by meshing one pair of gears one by one. If the oil outlet has an impedance, pressure fluctuations are formed. The mechanical vibration caused by such fluctuations is the main source of noise, which is called natural pulsation noise. Since each pair of meshing gears generates hydraulic shock from the moment of the oil discharge chamber to the oil discharge chamber, if the design of the tooth side clearance is unreasonable, such hydraulic shock will become the main impact noise. If the suction resistance of the pump is too large or the suction port attracts air, air pockets will be generated in the gear pump. The gas dissolved in the work will be separated into bubbles and squeezed to generate a blasting sound. This noise is called acupoint noise. Tests have shown that as the speed and pressure increase, the noise increases. Relatively speaking, the effect of speed on noise is greater than pressure. Therefore, at the same power, it is a good way to reduce noise by using a large displacement pump to operate at a lower speed.