JPS5836594A - Ball balancer of centrifugal rotary machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pole balancer for a centrifugal rotating machine for regulating vibration during rotation of a rotating tank.

For example, in a dehydrating/washing machine, during dehydration operation, the rotating tub performs a whirling motion due to the unevenness of the dehydrated material inside, and a resonance phenomenon occurs until the rotating tub reaches a steady rotation speed. It is well known that vibrations occur and the vibrations increase abnormally. For this reason, in the past, an annular case was provided concentrically with the rotating tank for dehydration, and
A pole balancer is provided in which several steel balls are movably accommodated within this annular case. That is, such a pole balancer utilizes the phenomenon that when the rotating tank is rotated near the resonant rotation speed, the steel balls are moved to a position that reduces the unbalanced load on the rotating tank. Since it is inevitable that the steel balls violently collide with each other when starting and stopping the dehydration operation, there is a problem in that a harsh metallic sound is generated each time the dehydration operation is performed. In order to deal with these problems, it has been considered to use rubber or resin balls instead of steel balls, but such configurations reduce the mass of the balls, so it is difficult to eliminate them. There is a drawback that the original purpose of regulating the vibration of the aquarium cannot be fully achieved. It has also been considered to form a buffer layer made of rubber or resin around the steel balls, but in this configuration, the buffer layer is damaged due to collisions between the steel balls and friction between the steel balls and the annular case. It is easy for the steel ball to come off from the steel ball, and since the smooth movement of the steel ball is hindered by the peeled off material, there is a drawback that the vibration regulating effect is halved and abnormal noise is generated.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to suppress the collision sound between spheres to a small level, eliminate the possibility that the collision sound becomes harsh to the ears, and yet achieve such excellent effects. A centrifugal rotating machine that winds with a structure that allows the mass of the sphere to be secured as much as necessary and eliminates the risk of damage caused by peeling off from the sphere and preventing the smooth movement of the sphere. To provide ball balancers.

An embodiment in which the present invention is applied to a dehydrating and washing machine will be described below with reference to the drawings.

In FIG. 1, 1 is the outer box of the washing machine, 2 is a water tank supported by an elastic suspension mechanism 3 disposed inside the outer box 1, and 4
5 is a rotating tank disposed in the water receiving tank 2, and 5 is a stirring blade disposed in the rotating tank 4. Reference numeral 6 denotes a motor disposed below the water receiving tank 2, which rotates the agitating blade 5 during washing and rinsing via a bead transmission mechanism 7, and rotates together with the agitating blade 5 during dewatering.
It is designed to rotate. Reference numeral 8 denotes a plastic annular case that is provided concentrically with the upper end of the rotating tank 4 and has an annular chamber 9 inside.Specifically, as shown in FIG. 78 is positioned at the upper end opening of the rotating tank 4 so that a predetermined gap exists between it and the upper side wall thereof, and a plurality of protrusions 10 integrally and intermittently protruded from the outer periphery of the annular case 8 are rotated. @ of tank 4
The annular case 8 is connected to the upper part of the wall, and thus the annular case 8 is attached and fixed to the upper part of the rotating tank 4. Now, reference numeral 11 denotes a plurality of spheres movably housed in the annular chamber 9, and as shown in FIG. ), and is configured to have shock absorbing properties.

In the dehydrating and washing machine having the above-described configuration, the dehydrating operation in which the rotating tub 4 is rotated at high speed results in a situation 11 in which the objects to be dehydrated in the rotating tub 4 are unevenly loaded due to the unrestricted distribution of the ridges. If this is done, the rotating tank 4 will perform a rotating motion, and the vibration will be maximum near the resonance rotation speed of the rotating tank 4.

When the rotary tank 4 is rotated in this way, the sphere 11 is moved to a position where the unbalanced load on the rotary tank 4 is reduced, as is well known, and the vibrations caused by the unbalanced load on the cough rotary tank 4 are thereby regulated. It becomes like this.

According to the zero-fired MK described above, since one sphere is formed by mixing metal powder and rubber or resin, a number of excellent effects as described below can be obtained.

(1) Since the spheres have shock absorbing properties, the collision noise between the spheres can be suppressed to a low level, and the collision noise does not turn into an insult.

(if) Since the sphere contains metal powder, it is possible to secure the necessary mass of the sphere, so that the vibration regulating effect of the rotating tank will not become insufficient, especially in this case. If a lead-based metal powder is used as the metal powder as in the embodiment of the present invention, it is effective because the mass of the sphere can be sufficiently secured.

(2) Unlike the conventional structure in which a buffer layer is formed around the circumference 11 of the steel ball, there is no separation from the ball and its smooth movement is prevented, so the vibration regulating effect is reduced. , there is no risk of abnormal noise occurring.

Since the metal powder in the hood sphere is covered with rubber or resin, there is little risk of rust forming on the sphere, and therefore there is no problem even if the annular chamber housing the sphere is made less watertight. The watertight structure can simplify the manufacturing process and reduce costs.

FIG. 2 is a schematic longitudinal sectional view of the machine, FIG. 2 is a longitudinal sectional view of the main parts of the same embodiment, and FIG. 3 is a partially sectional front view of the sphere.

In the figure, 4 is a rotating tank, 9 is an annular chamber, 11 is a sphere, 111L
is lead oxide powder (metal powder), and 11b is rubber.

Figure 1 Figure 3 151

Claims (1)

[Claims] 1. A round article comprising a round annular chamber provided concentrically with the rotating tank and a plurality of spheres movably housed in the annular chamber, wherein the spheres are A pole balancer for a centrifugal rotating machine characterized by being formed by mixing metal powder and rubber or resin. 2. A pole balancer for a centrifugal rotating machine according to claim 1, wherein the metal powder is lead-based.