JPH0443892A - Oil separating device of rotary compressor - Google Patents

Abstract

PURPOSE:To make it easy to mount an oil separating device in a rotary compressor and also obtain a good oil separating function by providing a tubular spring member which has an edge portion to be engaged with the collar portion of an oil separating member and also has a tubular spring member having an inwardly-projecting protruding portion formed in the side plate thereof. CONSTITUTION:The oil separating device of a rotary compressor comprises an oil separating member 6 and a tubular spring member 10, and while a hole provided through the plate-shaped peripheral portion 6a of the oil separating member 6 is fitted over the protrusion 23a of the end ring 23 of a rotor 22 the tubular spring member 10 is inserted into the oil separating member 6 and fitted with a rotary shaft 3. The oil separating device is thus constituted of a small number of parts and can be installed and incorporated in the rotary compressor simply by means of fitting and insertion. Also no protruding portion is provided on the oil separating member 6 and the member 6 is supported at both its center and peripheral portions whereby a good and stable oil separating function can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention (Industrial Application Field) This invention relates to an oil separation device for a rotary compressor used in an air conditioner, a refrigerator, or the like.

(Prior Art) A conventional compressor used in an air conditioner or the like is configured as shown in FIG.

That is, the stator (
An electric motor 2 composed of a stator) 21 and a rotor 22 is provided, and a rotating shaft (
The rotor shaft 3 is mounted on a bearing 4 within the case body l.

A rotary compressor 5 having a refrigerant supply pipe 51 is installed at the bottom of the bearing 4 so as to be driven by the rotating shaft 3, and a rotary compressor 5 having a refrigerant supply pipe 51 is installed in the inner space of the stator end coil 21a at the upper end of the rotating shaft 3 as shown in FIG. As shown in the enlarged view, a disk-shaped oil separation member 6 is mounted on the shaft. In addition,
7 is a refrigerant discharge pipe attached to the upper part of the case body l;
8 indicates lubricating oil.

Therefore, in the above-mentioned rotary compressor, the rotating shaft 3 is rotated by the operation of the electric motor 2, and the refrigerant from the refrigerant supply pipe 51 (which is compressed by the rotary compressor 5) is discharged from the gas formed in a part of the bearing 4. It is discharged upward into the case body 1 from the passage 41.

After the discharged refrigerant containing the lubricating oil 8 passes through a passage 22a formed in the rotor 22 and collides with the rotating oil separation member 6, it is directed toward the end coil 21a.

When the refrigerant passes through this end coil 21a, it is separated into the refrigerant and the lubricating oil 8. Furthermore, the refrigerant containing the lubricating oil 8 in the upper space of the oil separating member 8 is also rectified by the rotation of the oil separating member 6, and the lubricating oil 8 with a large specific gravity is separated from the refrigerant by the centrifugal separation effect and flows further outward. blown away.

The refrigerant separated by the centrifugal action and also by the filter function of the end coil 21a is pumped from the discharge pipe 7 to the condenser constituting the refrigeration cycle. Further, the other separated lubricating oil 8 is configured to flow back into the oil tank 9.

By the way, as shown in FIG. 5, the oil separation member 6 is
The central portion is formed by being extruded downward into a cylindrical shape while continuing to the disk-shaped peripheral portion 6a, and the lower end portion is configured to be fitted onto the outside of the rotating shaft 3 via the stepped portion 6b.

A sleeve 3a is fitted onto the rotating shaft 3, and the oil separating member 8 is fixed between the C-shaped stop ring 61 and the sleeve 3a via a corrugated washer B2.

Therefore, in the conventional oil separation device, the oil separation member 6 is connected to the rotating shaft 3.
In addition to the C-shaped stop ring 61 and the corrugated washer 62, the sleeve 3a is required to fix it to the holder, and the installation has the disadvantage of requiring a large number of parts. Further, since the oil separation member 6 rotates at high speed together with the rotating shaft 3, it is required to be mounted and fixed in a well-balanced manner around the rotating shaft 3. However, since the oil separating member 6 is only fixed by sandwiching a small cylindrical part between the sleeve 3a and the wave washer 62 at the center, the overall installation is difficult to balance and requires mechanical fixing force. It was weak.

Furthermore, in order to reduce instability when fixing the oil separation member 6, conventionally a protrusion 23a is provided on the end ring 23 on the rotor 22 as shown in FIG. The oil separation member 6 is configured to protrude through and be fixed by caulking.

In addition, in this case, the central part of the oil separation member 6 is the cylindrical body 61
It is configured to be fitted and supported on the outside of the rotating shaft 3.

However, in such a configuration, the caulked portion on the oil separation member 6 protrudes above the oil separation member 6, and the protrusion portion has a drawback that the centrifugal separation action by the oil separation member 6 is inhibited.

(Problems to be Solved by the Invention) As described above, conventional oil separation devices for compressors have problems such as a large number of parts and troublesome assembly, and a decrease in oil separation function, so improvements should be made. was requested.

The object of the present invention is to provide an oil separation device for a rotary compressor that eliminates the above-mentioned conventional drawbacks, has a small number of parts, has a simple configuration, is easy to install, and can provide a good oil separation function. do.

C. Constitution of the Invention (Means for Solving the Problems) This invention provides an oil separation device for a rotary compressor in which an oil separation member is fixedly attached to the upper part of the rotor in the inner space of the stator end coil. The end ring of the rotor has a protrusion formed on the end ring, and a hole that fits into the protrusion of the end ring is provided on the peripheral edge, and the entire center part is formed by extruding downward into a cylindrical shape while continuing to the peripheral edge, and the bottom part an oil separation member having an opening with a flange on the inside; a cylindrical spring member having an edge that engages with the flange of the oil separation member and having a protrusion projecting inward formed on a side plate;
It is characterized by comprising a rotating shaft having a groove formed on its outer circumferential surface into which the cylindrical spring member is inserted and into which the protrusion is engaged.

(Function) The oil separation device for a rotary compressor according to the present invention includes an oil separation member and a cylindrical spring member. In this state, the cylindrical spring member is inserted and fitted onto the rotating shaft.

Therefore, the oil separator is constructed with a small number of parts, and can be easily installed by simply fitting and inserting the oil separator. Further, since there is no equivalent protrusion on the oil separation member and it is supported at both the center and the peripheral portion, a good and stable oil separation function can be obtained.

(Embodiment) Hereinafter, an embodiment of an oil separation device for a compressor according to the present invention will be described in detail with reference to FIGS. 1 to 3. Note that the same components as the conventional configuration are given the same reference numerals, and detailed explanations will be omitted.

FIG. 1 is a sectional view of a main part showing an embodiment of an oil separator for a compressor according to the present invention.

That is, the stator 2 is placed in the upper part of the sealed case body 1.
1 and a rotor 22,
The rotary shaft 3, which is integral with the rotor 22, is installed to drive a rotary compression device (5) shown in FIG. 4, as in the conventional case.

By driving the rotary compression device (5), the discharged refrigerant containing the lubricating oil (8) passes through the passage 22a formed in the rotor 22, collides with the oil separation member 6, and is separated from the refrigerant by the end coil 21a of the stator 21. It is separated into lubricating oil 8.

By the way, as shown in the plan view of FIG. 2 and the enlarged exploded view of FIG. By molding, it is extruded downward into a cylindrical shape while continuing to the peripheral edge 6a, and the bottom has an opening with a flange 6C inside. Further, a hole 6a' penetrating vertically is provided in the peripheral portion 6a, and this hole 8a' is configured to fit into a protrusion 23a provided on the upper surface of the aluminum end ring 23 of the rotor 22. .

Note that since the protrusion 23a is for positioning the oil separation member 6 and preventing displacement during rotation, it is not necessary to protrude above the peripheral edge 6a, and the hole 6a' does not necessarily need to be penetrated.

Further, the cylindrical spring member 10 is fixed to the rotating shaft 3 while locking the oil separation member 6 at its upper end, and has a folded edge 10a that engages with the flange 6C of the oil separation member 6. In addition, a protrusion 10b that protrudes inward is connected to the side plate 10c.
Multiple pieces are formed.

The entire cylindrical spring member 10 is made of an elastic body, and the projection IQb protrudes inward due to elastic deformation. It is fixed by fitting into the groove 3a. Note that the rotating shaft 3 is fixed to the rotor 22 by shrink fitting, and the upper end portion is processed to have a slightly smaller diameter so that the cylindrical spring member 10 can be inserted therein.

Therefore, in the oil separation device for a rotary compressor according to this embodiment, the cylindrical spring member 10 is attached to the rotating shaft 3 while the hole 6a' of the oil separation member 6 is fitted into the protrusion 23a of the end ring 23 of the rotor 22. It can be installed and fixed by simply pushing it in. The oil separation member 6 is stably attached to the end ring 23 of the rotor 22 at its peripheral edge Ba and to the rotating shaft 3 via the cylindrical spring member 10 at its center.

As described above, the oil separation device for a rotary compressor according to the present invention is composed of only two parts, the oil separation member 6 and the cylindrical spring member 10, and can be installed by simply pushing and fitting. Manufacturing and assembly are extremely easy.

Incidentally, since the protrusion 23a of the end ring 23 only serves to lock the oil separation member 6, it does not protrude onto the upper surface of the oil separation member 6 and has the advantage that the rectification effect and centrifugal separation function are not obstructed. .

[Effects of the Invention] As described above, the oil separation device for a rotary compressor according to the present invention has a simple configuration, is easy to install, and can provide a good oil separation function. It can be used on machines to achieve remarkable effects.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the main parts of an embodiment of an oil separation device for a rotary compressor according to the present invention, FIG. 2 is a plan view of the main parts of FIG. 1, and FIG. 3 is a cross-sectional view of the main parts of FIG. 4 is an enlarged exploded perspective view, FIG. 4 is a sectional view showing a conventional rotary compressor, FIG. 5 is an enlarged sectional view showing the oil separation device of the rotary compressor of FIG. 4, and FIG.
The figure is a sectional view of a main part showing another conventional oil separation device for a rotary compressor. DESCRIPTION OF SYMBOLS 1... Case body, 2... Electric motor, 21... Stator, 21a... End coil, 22... Rotor,
22a... passage, 23... end ring,
23a...Protrusion, 3...Rotation shaft, 3a・
...Groove portion, 6...Oil separation member, 6a...Peripheral portion,
5 a/... Hole, 6C... Flange, 8... Lubricating oil, 10... Cylindrical spring member, 10a... Edge,
10b... Protrusion. Agent Patent Attorney Norifu Ogo

Claims (1)

[Claims] In the oil separation device of a rotary compressor, which is installed in the inner space of the stator end coil with an oil separation member fixed to the upper part of the rotor, the end ring of the rotor has a protrusion formed on the upper surface, and the protrusion of the end ring. an oil separation member having a hole fitted in the peripheral edge thereof, the central part of the whole being extruded downward into a cylindrical shape while continuing to the peripheral edge, and the bottom opening having a flange on the inside; A cylindrical spring member having an edge that engages with the flange of the oil separation member and a protrusion protruding inwardly formed on a side plate; and a groove into which the cylindrical spring member is fitted and in which the protrusion is engaged. 1. An oil separation device for a rotary compressor, comprising: a rotary shaft having an outer peripheral surface formed with a rotary shaft;