JP2531707Y2 - Rotor - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a rotor of a rotary device used for a compressor mounted on an electric refrigerator, an air conditioner, and various refrigeration devices. It is.

(Prior Art) Japanese Patent Application Laid-Open No.
There is -273154.

FIG. 6 is a cross-sectional view showing a rotor structure of a rotating electric machine according to the prior art. FIG. 7 is a right side view of the rotor, and FIG. 8 is a left side view of the rotor. In FIG. 6, 1 is an iron core, 2 is an end ring, 3a and 3b are semicircular balance weights, and 4 is a projection for mounting a balance weight.

The function of each part of the rotor thus configured will be described. Normally, the compressor has an eccentric weight in the compression mechanism due to its structure. For this reason, it is necessary to arrange a balance weight on the rotor so as to cancel the eccentric weight.

For example, in the case of the configuration shown in FIG. 9, if the eccentric weight is Z, the balance weight of the rotor is X and Y, and the distance between their centers of gravity is A and B, the balance weight for canceling the eccentric weight Z is assumed. The weights X and Y are obtained by the following equations.

The balance weight weight X, Y determined from these
If the eccentric weight is attached to the rotor, the eccentric weight is theoretically negated, but the direction of the eccentric weight does not match the direction of the balance weight attached to the rotor due to, for example, processing errors as shown in FIG. There is.

In such a case, the combined force of X, Y, and Z does not become zero, and
As shown in the figure, the unbalanced weight F which is shifted by about 90 ° with respect to the X, Y, and Z directions remains.

As a result, to remove the residual unbalance weight F,
As shown in FIG. 11, a balance correction weight corresponding to F 'is added to the rotor. Alternatively, it is necessary to remove the weight corresponding to F from the semicircular balance weights, and they are X,
It is necessary to correct each of Y by the amount corresponding to the dimensions A and B.

(Problems to be Solved by the Invention) However, in a conventional semi-circular balance weight, for example, when a balance weight is added to a rotor, its mounting position is, as shown in FIG. 12, outside the semi-circular balance weight 3b. Becomes Then, it is necessary to add a balance correction weight by, for example, applying a thread to the end ring 2. On the other hand, in order to remove the residual unbalance weight F by the weight loss method, the weight loss portion is outside the semicircular balance weight 3a as shown in FIG. 13, and the weight is reduced by removing the end ring 2. Need arises.

As described above, in the conventional semicircular balance weights 3a and 3b, it is necessary to perform some processing on the end ring portion 2 in order to eliminate the residual unbalance F caused by a slight angle deviation of the eccentric load Z. In addition, there is a problem that the function is lowered in terms of electrical and mechanical strength.

In view of the above problems, an object of the present invention is to provide a rotor having a balance weight capable of correcting a residual imbalance caused by a slight angular deviation of an eccentric load without machining the end ring. I do.

[Structure of the Invention] (Means for Solving the Problems) The present invention corrects the residual unbalance weight of the rotating body because the unfolded angle of the circular ring in the sector is 190 to 270 degrees. Balance weight that can increase or decrease the added weight,
By mounting and using the balance weight mounting projections in the direction opposite to the both ends of the end ring of the rotor core, the balance of the rotor can be corrected by machining the balance weight without machining the end ring. It becomes possible.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a rotor equipped with a balance weight composed of a part of an annulus having a central angle exceeding 180 degrees, and FIG. 2 is a right side view thereof. FIG. 3 is a left side view thereof. 5 is iron core, 6
Is an end ring, 7a and 7b are balance weights composed of a sector-shaped annular body having a deployment angle exceeding 180 degrees (shown in FIGS. 2 to 5 as 250 to 270 degrees), and 8 is a projection for mounting the balance weight described above. It is.

The balance weights 7a and 7b are provided with a plurality of holes in advance so that they can be inserted into the balance weight mounting projections 8. It is fixed.

The operation of the rotor configured as described above will be described. Now, the eccentric weight Z and the weights X and Y of the balance weights
Acts in the directions as shown in FIG. 6, the respective weight distributions in FIG. 2 and FIG. 3 become as shown in FIG. 4 and FIG.

For example, in FIG. 4, in order to cancel the residual unbalance weight F generated due to the deviation of the angle of the eccentric weight Z,
In the case where the additional weight F 'is given to the balance weight 7b, for example, the balance weight 7b may be threaded in the direction of F' to add a weight corresponding to F '. End ring part 6 as seen
It is no longer necessary to process the steel.

On the other hand, when reducing the balance weight in order to cancel the residual unbalance weight F, it becomes possible by deleting the balance weight 7a in the direction of F as shown in FIG. There is no need to delete it.

Further, the deployment angle of the ring is practically 190 to 270 degrees, and when the deployment angle exceeds 270 degrees, the center of gravity of the balance weights 7a and 7b is close to the center of the ring. For this reason, the thickness of the balance weight required to obtain a predetermined balance weight increases, and the entire rotor becomes large due to the balance weight.

In the present embodiment, the balance weights 7a and 7b are composed of a plurality of plates, but may have an equivalent structure integrally formed by forging or the like.

As described above, according to the present invention, the balance weights to be mounted in the directions opposite to the both end faces of the end ring of the rotor core, respectively, are formed by cutting out a part of the ring shape and having a fan-shaped annular shape having a deployment angle of 190 to 270 degrees. By using the body, it is possible to correct the residual imbalance in the balance weight portion without processing the end ring portion when correcting the residual imbalance as in the related art.

[Effects of the Invention] As is apparent from the above description, the rotor according to the present invention uses a balance weight composed of a sector-shaped annular body having a development angle of 190 to 270 degrees with a part of the annulus cut out. Therefore, regarding the eccentric load generated by the compression mechanism such as a compressor, the direction of the eccentric load is shifted from the direction of the weight of the balance weight mounted on the rotor, and the remaining unbalanced weight generated by the deviation is compared with the conventional semicircular balance weight. The operation which cannot be corrected or extremely difficult with the rotor used can be extremely simplified and the balance can be corrected without machining the end ring. As a result, the balance of the entire rotating system is significantly improved, and low vibration can be achieved.

[Brief description of the drawings]

1 is a sectional view of the rotor of the present invention, FIG. 2 is a right side view of FIG. 1, FIG. 3 is a left side view of FIG. 1, and FIG. 5, FIG. 5 is a diagram showing each weight distribution in FIG. 3, FIG. 6 is a sectional view of a rotor having a conventional structure, FIG. 7 is a right side view of FIG. 6, and FIG. Left side view of figure, ninth
The figure shows a conceptual diagram of the eccentric weight and rotor balance weight.
FIG. 10 is a vector diagram of the eccentric weight and each balance weight weight, FIG. 11 is a vector composite diagram of each weight in FIG. 10, FIG. 12 is a description diagram of each weight distribution in FIG. 7, and FIG. FIG. 8 is a diagram illustrating each weight distribution in FIG. 8. 1,5 ... iron core, 2,6 ... end ring, 3a, 3b ... semicircular balance weight, 4 ... semicircular balance weight mounting projection,
7a, 7b: annular balance weight, 8: annular balance weight mounting projection.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-273154 (JP, A) JP-A-60-200750 (JP, A) JP-A-62-203535 (JP, A) JP-A 62-203535 171442 (JP, A) JP-A-60-216751 (JP, A) JP-A-59-68718 (JP, A) JP-A-53-78402 (JP, U) JP-A-59-183176 (JP, U) Japanese Utility Model Showa 56-106079 (JP, U) Japanese Utility Model Showa 56-175592 (JP, U) Japanese Utility Model Showa 60-7645 (JP, U) Japanese Utility Model Showa 59-95783 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] A balance weight capable of increasing or decreasing an additional weight for correcting a residual unbalanced weight of a rotating body, wherein a development angle of a fan-shaped annular body in which a part of the annular shape is cut is 190 to 270 degrees,
A rotor characterized in that the rotor cores are mounted via balance weight mounting projections in directions opposite to both end surfaces of an end ring of the rotor core.