JPH05118293A - Oil separation device for closed type motor driven compressor - Google Patents

Abstract

PURPOSE:To decrease bearing pressure applied from an inside face of a pin insertion hole to a side face of a pin for supporting an oil separation plate so as to prevent breakage of the pin and further restrain loosening of a caulking work part. CONSTITUTION:Application of burring work 5a to a pin insertion hole 5 increases a contact area between a pin 3 and an inside face of the pin insertion hole 5 so that bearing force applied to a contact face for a unit area is decreased. By providing a groove 3a at a pin root part, a pin diameter at the time of caulking work is sufficiently expanded over a whole area of an inside face of the pin insertion hole 5 so that generation of loosening at a caulking work part can be restrained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetically-sealed electric compressor provided with an oil separation device in the upper part of a hermetically sealed container.

[0002]

2. Description of the Related Art FIG. 11 is a sectional view showing an oil separator for a conventional hermetic electric compressor disclosed in, for example, Japanese Patent Laid-Open No. 3-32191, in which 1 is a rotor and 2 is a rotor end ring. Reference numeral 3 is a pin standing upright from the rotor end ring 2, 4 is an oil separation plate, 5 is a pin insertion hole formed in the oil separation plate 4, 6 is a rotor gas hole, and 7 is a crankshaft.

Next, the operation will be described. Oil separation plate 4
Separates a large amount of oil contained in the compressed gas sent upward from the lower compression element through the rotor gas hole 6 and prevents the oil from flowing out of the closed container through a discharge pipe (not shown). It is provided for.

[0004]

A conventional oil separation device for a hermetic electric compressor is mounted by inserting a pin into an insertion hole provided in an oil separation plate and pressing the pin from the axial direction to cause caulking deformation. Since the pins and pin insertion holes are deformed due to variations in the processing accuracy of the pins and pin insertion holes and changes in the rotation speed of the rotor during start and stop, etc. When the hermetic electric compressor is in operation, the oil separation plate vibrates and rubs against the pin, and the pin is cut by the surface pressure received from the inner surface of the pin insertion hole.

The present invention has been made to solve the above problems, and an object of the present invention is to reduce the surface pressure that the side surface of the pin receives from the inner surface of the pin insertion hole to prevent the pin from being cut. Another object of the present invention is to obtain an oil separation device for a hermetic electric compressor that suppresses the occurrence of loosening of the caulking portion.

[0006]

An oil separator for a hermetic electric compressor according to claim 1, wherein a hermetic container, an electric element and a compression element housed in the hermetic container, and an end of a rotor of the electric element. In the hermetic electric compressor provided with an oil separation plate in which the pin insertion hole is fixed to the pin provided in the section, the pin insertion hole of the oil separation plate is burred.

According to another aspect of the present invention, there is provided an oil separating device for a hermetic electric compressor, a hermetic container, an electric element and a compression element housed in the hermetic container, and a pin provided at an end of a rotor of the electric element. In a hermetic electric compressor having an oil separation plate to which a pin insertion hole is fixed, the pin insertion hole of the oil separation plate is subjected to burring, and the pin provided at the end of the rotor is A feature is that a groove is provided around the root part.

According to another aspect of the present invention, there is provided an oil separation device for a hermetic electric compressor, a hermetic container, an electric element and a compression element housed in the hermetic container, and a pin provided at an end of a rotor of the electric element. In a hermetic electric compressor having an oil separation plate to which a pin insertion hole is fixed, the pin insertion hole of the oil separation plate is subjected to burring, and the pin provided at the end of the rotor is A groove is provided around the root portion, and a burring portion of the pin insertion hole of the oil separation plate is housed in the groove.

[0009]

The oil separating device of the hermetic electric compressor according to claim 1 is
The contact area between the side surface of the pin and the oil separating plate becomes large, and the surface pressure that the side surface of the pin receives from the inner surface of the pin insertion hole is reduced to prevent the pin from being cut.

In the oil separating device of the hermetic electric compressor according to the second aspect, since the pin diameter at the time of caulking is sufficiently expanded over the entire inner surface of the pin insertion hole, it is possible to suppress loosening of the caulking portion. ..

In the oil separating apparatus for the hermetic electric compressor according to the third aspect, the occurrence of loosening of the caulking portion can be suppressed, and the appearance is the same as that of the conventional one. Moreover, no special measures against interference are required.

[0012]

【Example】

Example 1. Embodiment 1 FIG. 1 is an exploded perspective view of essential parts showing Embodiment 1 of the present invention, and FIG. 2 is an enlarged sectional view of the same. In the figure, 5a is a burring portion formed in the pin insertion hole 5.

Next, the operation of the first embodiment will be described. Since the burring portion 5a is provided in the pin insertion hole 5 provided in the oil separation plate 4, the contact surface between the side surface of the pin 3 and the oil separation plate 4 is larger than that of the conventional one, and the side surface of the pin 3 is The surface pressure received from the inner surface of the pin insertion hole 5 is reduced to prevent the pin 3 from being cut. The number of pins for fixing the oil separation plate in the present invention is not limited.

Example 2. Second Embodiment FIG. 3 is an exploded perspective view of essential parts showing a second embodiment of the present invention, and FIG. 4 is an enlarged sectional view of the same. In the figure, 3a is a groove provided around the root of the pin.

Next, the operation of the second embodiment will be described. Since the groove 3a is provided at the root portion of the pin 3, the pin diameter at the time of caulking is sufficiently expanded over the entire inner surface of the pin insertion hole 5, so that the occurrence of loosening at the caulking portion can be suppressed.

Embodiment 3. FIG. 5 is an exploded perspective view of essential parts showing a third embodiment of the present invention, and FIG. 6 is an enlarged sectional view of the same. In Example 3, since the actions of Example 1 and Example 2 are obtained in combination, the surface pressure that the side surface of the pin 3 receives from the inner surface of the pin insertion hole 5 is reduced, and further, the occurrence of loosening of the caulking portion is suppressed. It is possible to prevent the pin 3 from being cut.

Example 4. 7 is an exploded perspective view of essential parts of Embodiment 4 of the present invention, and FIG. 8 is an enlarged sectional view of the same. In the figure, 2 is a rotor end ring, 3 is a pin, 3a is a pin 3
Grooves provided around the root portion, 4 is an oil separation plate, 5 is a pin insertion hole, and 5a is a burring portion.

Next, the operation of the fourth embodiment will be described with reference to FIGS. Since the pin insertion hole 5 provided in the oil separation plate 4 is accompanied by the burring portion 5a, the contact surface between the side surface of the pin 3 and the oil separation plate 4 is larger than that of the conventional device, and the side surface of the pin 3 is the pin. The surface pressure received from the inner surface of the insertion hole 5 is reduced, and the effect of preventing the pin 3 from being cut is obtained.

Further, since the groove 3a is provided around the root of the pin, the pin diameter is sufficiently expanded over the entire inner surface of the pin insertion hole 5 at the time of caulking, so that rattling of the caulking portion is suppressed. The action that can be obtained is obtained.

Further, since the burring portion 5a is housed inside the groove 3a, the appearance of the upper surface of the oil separation plate after caulking is almost the same as that of the conventional device.

Embodiment 5. In the fourth embodiment, the pin 3
However, the present invention is not limited to this, and any number of pins may be used as shown in FIG. 9, and the same effect as that of the above-described fourth embodiment can be obtained.

Embodiment 6. FIG. 10 shows a sixth embodiment of the present invention.
As shown in the figure, the oil separator can also be used in combination with a caulking portion having a conventional shape.

[0023]

The present invention has the following effects. An oil separation device for a hermetic electric compressor according to claim 1, wherein a hermetic container, an electric element and a compression element housed in the hermetic container, and a pin inserted into a pin provided at an end of a rotor of the electric element. In the hermetic electric compressor provided with the oil separation plate to which the hole is fixed, since the pin insertion hole of the oil separation plate is configured to be burred, contact between the side surface of the pin and the oil separation plate The area is increased, the surface pressure of the side surface of the pin received from the inner surface of the pin insertion hole is reduced, and the cutting of the pin can be prevented.

According to another aspect of the present invention, there is provided an oil separation device for a hermetic electric compressor, a hermetic container, an electric element and a compression element housed in the hermetic container, and a pin provided at an end of a rotor of the electric element. In a hermetic electric compressor having an oil separation plate to which a pin insertion hole is fixed, the pin insertion hole of the oil separation plate is subjected to burring, and the pin provided at the end of the rotor is Since the groove is provided around the root portion, the pin diameter at the time of caulking is sufficiently expanded over the entire inner surface of the pin insertion hole, so that the occurrence of loosening of the caulking portion can be suppressed.

According to another aspect of the present invention, there is provided an oil separation device for a hermetic electric compressor, a hermetic container, an electric element and a compression element housed in the hermetic container, and a pin provided at an end of a rotor of the electric element. In a hermetic electric compressor having an oil separation plate to which a pin insertion hole is fixed, the pin insertion hole of the oil separation plate is subjected to burring, and the pin provided at the end of the rotor is Since a groove is provided around the root part and the burring part is housed in the groove in the pin insertion hole of the oil separation plate, it is possible to suppress the occurrence of loosening of the caulking part and the appearance is conventional. Since there is no difference with other parts above the oil separation plate, no special measures against interference are required.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts showing an oil separation device for a hermetic electric compressor according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of an essential part showing an oil separation device of a hermetic electric compressor according to a first embodiment of the present invention.

FIG. 3 is an exploded perspective view of an essential part showing an oil separation device of a hermetic electric compressor according to a second embodiment of the present invention.

FIG. 4 is an enlarged sectional view of an essential part showing an oil separation device of a hermetic electric compressor according to a second embodiment of the present invention.

FIG. 5 is an exploded perspective view of essential parts showing an oil separation device of a hermetic electric compressor according to a third embodiment of the present invention.

FIG. 6 is an enlarged sectional view of an essential part showing an oil separation device of a hermetic electric compressor according to a third embodiment of the present invention.

FIG. 7 is an exploded perspective view of essential parts showing an oil separation device for a hermetic electric compressor according to a fourth embodiment of the present invention.

FIG. 8 is an enlarged sectional view of an essential part showing an oil separation device of a hermetic electric compressor according to a fourth embodiment of the present invention.

FIG. 9 is an exploded perspective view of essential parts showing an oil separation device for a hermetic electric compressor according to a fifth embodiment of the present invention.

FIG. 10 is an exploded perspective view of essential parts showing an oil separation device of a hermetic electric compressor according to a sixth embodiment of the present invention.

FIG. 11 is a cross-sectional view showing an oil separation device of a conventional hermetic electric compressor.

FIG. 12 is an exploded perspective view of essential parts showing a conventional oil separation device for a hermetic electric compressor.

[Explanation of symbols]

 1 rotor 3 pin 3a groove 4 oil separation plate 5 pin insertion hole 5a burring part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yutaka Sato 3-18-1, Oga, Shizuoka City Mitsubishi Electric Corporation Shizuoka Works

Claims (3)

[Claims] 1. A hermetic container, an electric element and a compression element housed in the hermetic container, and an oil separation plate having a pin insertion hole fixed to a pin provided at an end of a rotor of the electric element. In the hermetic electric compressor provided, an oil separating device of the hermetic electric compressor, wherein a pin insertion hole of the oil separating plate is subjected to burring processing. 2. A hermetic container, an electric element and a compression element housed in the hermetic container, and an oil separation plate in which a pin insertion hole is fixed to a pin provided at an end of a rotor of the electric element. In the hermetic electric compressor provided, the pin insertion hole of the oil separation plate is subjected to burring, and the pin provided at the end of the rotor is provided with a groove around the root. Oil separation device for closed electric compressor. 3. A hermetic container, an electric element and a compression element housed in the hermetic container, and an oil separation plate having a pin insertion hole fixed to a pin provided at an end of a rotor of the electric element. In the hermetic electric compressor provided, the pin insertion hole of the oil separation plate is subjected to burring processing, and the pin provided at the end of the rotor is provided with a groove around the root part thereof. An oil separating device for a hermetic electric compressor, wherein a burring portion of the pin insertion hole is housed in the groove.