Scientific

Some research work has been done on the dynamic analysis of roller supported horizontal centrifugal casting, the influence of roller

The main innovations are as follows: (1) Through mechanical analysis, the calculation model of support stiffness and damping of roller

As shown in Fig. 1, the temperature of the cast pipe and mold changes along the radial direction. It is

After the molten steel is poured into the mold, there will be heat exchange with the mold. After a period

Taking the roller supported horizontal centrifugal casting machine as the research object, the dynamic performance of the centrifugal casting machine,

Before casting, preheat the mold to a certain temperature TMI, and the casting temperature of liquid metal is TP; when

The mold and its internal area are discretized. The mold is divided into M1 grids in the radial direction, M2

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