The solution domain is discretized into several nodes, and there is heat transfer between each node. The heat balance equation […]
In the forced vibration analysis, it is assumed that there are eccentric masses distributed on the cast rotor, the eccentricity
The natural frequencies in the range of 0-1000 rad / s are given. It can be seen that the natural
Because the foundation is placed on the foundation, the comprehensive stiffness KF of the foundation and foundation can be regarded
Figure 1 shows the structural diagram of the roller supported horizontal centrifugal casting machine including foundation and foundation. The casting
In practice, the geometric error between the supporting roller and the mold is often difficult to be expressed by a
Considering the processing method of roller and mold, the surface roughness Ra is in the range of 1.6-25 μ m.
It is assumed that the geometric errors of the left roller, the right roller and the outer circle of the
If the mold has eccentric mass at the roller support, the eccentricity is e = 0.03mm, and the phase angle
The transfer matrix method is also used to calculate the dynamic performance of the cast rotor. Firstly, the rotor is
At any time t, the lower part of the mold contour always contacts with a point of the upper part
The microscopic shape of an object’s surface is called surface topography. No matter what method is used to process the
In fact, due to the influence of processing accuracy and other factors, the profile of roller and mold will produce
Establish the coordinate system origin 0 as shown in Fig. 1, which coincides with the center of the left roller,
There are two types of excitation on the rotor of rotating machinery, one is the excitation force acting on the
In the theoretical calculation, the theoretical model is still consistent with the model described, but in the programming calculation, some
In order to verify the correctness of the theoretical model in this chapter, an experimental device for vibration measurement of
There is an eccentric mass on each section along the axis of the mold. The eccentric mass on the i-th
Through programming calculation, the first four critical speeds of centrifugal casting machine can be obtained. It can be seen that
Taking the horizontal roller supported centrifugal casting machine of an equipment manufacturing Co., Ltd. as an example, the vibration performance
The influencing factors of ball valve torque mainly include pressure, temperature, medium type, property and quantity of suspended substance in
The built-in fork type pneumatic actuator (Fig. 1) replaces the gear rack of the traditional rack pneumatic actuator with the
The external fork type pneumatic actuator is also divided into double acting type and single acting type, which is composed
The best wax dipping process was adopted, and the sample after wax dipping was used as wax pattern. The ceramic
Rack and pinion actuator is the most commonly used pneumatic actuator. The middle of the cylinder is connected with the
The structure and operation characteristics of the ball valve determine that the opening torque of the ball valve is unbalanced,
The wax impregnation process plays an important role in improving the strength and surface quality of the specimen. According to
According to the structural characteristics of the feeding rotor of the centrifugal casting machine, the transfer matrix method is used
The normal damping between single ball and raceway is as follows: Where α is the half width of the Hertz
The load of self-aligning ball bearing is shared equally by two rows of rolling elements. Then for each row of
