According to the cause analysis of the shell forging crack, the forging deformation is increased by increasing the forging process, breaking up the accumulation and distribution of the internal chain impurity phase, so that the internal and external deformation of the shell forging is more uniform. In order to...
The crack is located in the middle of the shell and at the root of the processed 8-shaped hole. The plane of the crack is parallel to the forging axis and extends along it. The fracture characteristics of the original crack area are small dimples and impurity phases, and...
Macro analysis It can be seen from Fig. 1 (a) that the cracks are exposed on the forging surface, the plane composed of transverse and longitudinal cracks is parallel to the forging axial direction, and the crack plane is about in the middle region of the forging; After opening...
(1) Control of noise caused by flow pulsation. Through the above analysis of the causes of noise, we can see that the pulsation rate of flow pulse should be reduced as much as possible. When selecting gear pump, the appropriate number of gear teeth should be selected according to...
(1) Pump flow pulsation causes noise. In the process of operation, the pump is faced with the noise problem caused by flow pulsation phenomenon, and the possibility of flow pulsation being eliminated in the process of pump operation is very low. The results show that the flow pulsation of...
With the rapid development of industrial society, the application scope of internal gear pump is more and more wide, and the requirements are also higher and higher. In addition to improving its work efficiency, it is also necessary to reduce the noise generated in the operation process as far...
For the involute gear, the tooth profile parameters are mainly the number of teeth Z, modulus, pressure angle α, modification coefficient X, addendum height coefficient h and tip clearance coefficient. Because the influence of trapped oil on the average flow rate and pulsation is mainly reflected in the axial...
The flow fluctuation quality is mainly reflected in the fluctuation coefficient. The smaller the fluctuation coefficient is, the better the quality is. The example parameters of gear micropump are as follows: high speed of 4000 R / min, Pi of 1.1 MPa, Po of 1.6 MPa, modulus of 1,...
In one meshing cycle of , only the volume change rate DV of trapped oil compression in Fig. 1 flows into the volumetric extrusion area of E1, O1, N, O2, E2 from the unloading slot at the end of the output chamber, except that part of...