JPH05332276A - Oil separating device for compressor - Google Patents

Abstract

PURPOSE:To prevent accident due to entry of fixing metal fittings, etc., beforehand, simplify construction, and facilitate production and assembly. CONSTITUTION:A projected supporting shaft 14 is provided at the top end of a rotor 8. A stage 17 is formed on the outer periphery of the top end of this supporting shaft 14, an oil separating disk 15 is formed integrally with an elastic member so that it is provided with an engaged tube 18, a flange part 19, and a bent part 20, multiple protruded engaged pieces 21a and 21b which are made by cutting a part of the wall body of the engaged tube 18 in roughly Uform and raising their top ends are formed in the engaged tube 18 of the oil separating disk 15 so that their top ends are opposed to each other, and these protruded engaged pieces 21a and 21b are engaged with the stage 17 at the top end of the supporting shaft 14 to fix the oil separating disk 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil separation device for a compressor having an oil separation disk with a flange protruding horizontally in a flow path of a compressed fluid, and particularly to an oil separation device which does not require fixing metal fittings. The present invention relates to a compressor oil separation device that can fix a separation disk.

[0002]

2. Description of the Related Art In a compressor oil separation device in which a drive motor and a compression device are vertically and vertically installed in a sealed casing, and an oil separation disk is provided on the rotor of the drive motor. A support shaft is provided so as to project from the upper end surface of the, and an oil separation disk is attached to the upper end of this support shaft.
It is generally known that an oil separation disk is fixed to the tip of a support shaft by a C-shaped retaining ring and an elastic washer.

FIG. 4 is an exploded view of the components of the conventional oil separation device for a compressor. The conventional oil separation device for a compressor includes an oil separation disk 31, a support shaft 32 for supporting the oil separation disk 31, a C-shaped retaining ring 33 for fixing the oil separation disk 31, and an elastic corrugated washer 34. It consists of A groove 36 is formed on the outer peripheral surface of the support shaft 32 for mounting the step portion that engages with the oil separation disk 31, the C-shaped retaining ring 33, and the corrugated washer 34. The oil separation disk 31 includes a recess 37 and an opening 38 provided in the center, and a flange 39 extending from the upper edge of the recess 37.
And a bent portion 40 formed by bending the peripheral portion of the flange portion 39 on the same side as the concave portion 37.

FIG. 5 shows a state in which the oil separating disk 31 is attached to the tip of the support shaft 32. The opening 38 of the oil separation disk 31 is engaged with the step 35 of the support shaft 32. In the groove 36 of the support shaft 32, the corrugated washer 34
And a C-shaped retaining ring 33 are attached. The corrugated washer 34 is attached in a state where the oil separating disk 31 is pressed from above by the C-shaped retaining ring 33. As a result, the oil separation disk 31 is fixed to the upper end of the support shaft 32.

In this conventional oil separation device, the gas fluid containing lubricating oil rises along the outer peripheral surface of the rotor 41 of the drive motor and collides with the lower surface of the flange portion 31 of the oil separation disk 31. By the collision between the oil separation disk 31 and the gas fluid, the oil component such as lubricating oil contained in the gas fluid is condensed on the lower surface of the oil separation disk 31 and separated from the compressed gas.

[0006]

However, in the above-described conventional oil separation device for a compressor, the number of parts of the fixing metal fittings such as the C-shaped retaining ring and the corrugated washer for fixing the oil separation disk is large, and the structure is complicated. The manufacturing process was complicated.
In addition, since the fixing metal fittings such as the C-shaped retaining ring and the corrugated washer have small external dimensions, when installing the oil separation disk,
These fixing fittings were mixed in the casing, causing the compressor to malfunction. Further, in the above-described conventional compressor oil separation device, the oil separation disk, the support shaft, and the fixing metal fitting must be combined with high accuracy to fix the oil separation disk. Since it was necessary to finish parts and the like with high dimensional accuracy, it was difficult to manufacture a compressor as a whole. Therefore, an object of the present invention is to solve the problems of the conventional oil separation device for a compressor, prevent accidents due to mixing of parts, have a simple structure, and have a compressor that is easy to manufacture and assemble. An object is to provide an oil separation device.

[0007]

In order to achieve the above object, an oil separation device for a compressor according to the present invention comprises a drive motor and a compression device which are vertically and serially incorporated in a sealed casing. In the oil separation device of the compressor, in which the upper part of the rotor of the compressor is provided with the oil separation disk with the flange protruding in the flow path of the compressed fluid, the support shaft protruding perpendicularly to the upper end surface of the rotor is provided. A ring-shaped step portion is formed on the outer peripheral surface of the upper end of the support shaft, and an engagement cylinder that is loosely fitted to the outer peripheral surface of the support shaft by an elastic member, and a flange that extends vertically from one end of the engagement cylinder. The oil separation disk is integrally molded so as to have a portion, and a plurality of protruding engagement pieces protruding from a part of the inner wall of the engagement cylinder are formed on the engagement cylinder of the oil separation disk. To the upper end surface of the support shaft and the stepped portion to secure the oil separation disk. A configuration.

[0008]

In the oil separating device for a compressor of the present invention, a step portion for engaging is provided on the outer peripheral surface of the tip end portion of the support shaft, and the oil separating disk is integrally formed by an elastic member. Forming a plurality of protruding engagement pieces protruding on a part of the inner wall of
Since the oil separation disk is fixed by engaging these protruding engagement pieces with the upper end surface and the stepped portion of the support shaft, a fixing fitting for fixing the oil separation disk is not required, and the structure of the oil separation disk can be greatly simplified. Therefore, it is possible to prevent components from being mixed into the casing when the oil separation disk is installed. Further, since the protruding engagement piece of the oil separation disk is elastically deformed to absorb the dimensional error of the step portion of the support shaft and the like, the dimensional accuracy of the support shaft and the like has a relatively large allowable range and is easy to manufacture. Is. Further, since the oil separation disk can be easily attached by pressing and fitting the oil separation disk at the tip of the support shaft, it is possible to obtain the compressor oil separation apparatus that is easy to manufacture and assemble as a whole. ..

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. The essential part of the present invention is the oil separation disk and its mounting structure. Before describing the structure of the oil separation disk, the entire compressor will be described.

FIG. 2 shows a vertical section of a rotary compressor which is an example of the compressor of the present invention. A rotary compressor, generally designated by reference numeral 1, has a compressor body 2 and a gas-liquid separator 3. The compressor body 2 has a closed casing 4. Inside the casing 4, a drive motor 5 and a rotary type compression device 6 are vertically arranged in series. The drive motor 5 has a stator 7 fixed to the side wall of the casing 4, and a rotor 8 rotatably arranged inside the stator 7. The compression device 6 has upper and lower two compression sections 9, and each compression section 9 has a cylinder 10, a roller 11 and a vane 12.
The rotor 8 of the drive motor 5 and the roller 11 of the compression device 6 are integrally connected by a common rotary shaft 13.
A sleeve-shaped support shaft 14 is press-fitted into the oil supply hole 8a in the rotation shafts of the drive motor 5 and the compression device 6 from above. An oil separation disk 15 having a disk-shaped flange is fixed to the upper end of the support shaft 14.

FIG. 3 is an exploded view of the support shaft 14 and the oil separating disk 15. The support shaft 14 has a ring-shaped groove 16 on the outer peripheral surface of the upper end portion.
A step portion 17 is formed between the tip portions of the. On the other hand, the oil decomposition disk 15 is made of an elastic material such as rubber.
Engagement cylinder 1 formed integrally and loosely fitted on the outer periphery of the support shaft 14.
8, a flange portion 19 vertically extending from one end of the engagement cylinder 18 to the engagement cylinder 18, and a bent portion 20 in which the peripheral edge portion of the flange portion 19 is bent in the same direction as the engagement cylinder 18. Have In the engagement cylinder 18 of the oil separation disk 15, a part of the inner wall of the engagement cylinder 18 is cut into a U shape to cause the tip,
A plurality of protruding engagement pieces 21 are provided so that their tips are opposed to each other in the radial direction of the rotating shaft. As shown in FIG. 2, the projecting engagement piece 21 in this embodiment has a lower engagement piece 21a with its tip facing upward and an upper engagement piece 2 with its tip facing downward.
And 1b are provided alternately. The tip end of the lower engagement piece 21a is formed inward of the engagement cylinder 18, and the upper engagement piece 21b is formed so as to incline downward. To attach the oil separation disk 15 to the tip of the support shaft 14, the engagement cylinder 18 of the oil separation disk 15 is externally fitted to the support shaft 14 and is pushed down in the direction of arrow A shown in FIG. , 21b
Is engaged with the step portion 17 of the support shaft 14 and the upper end surface 14a.

FIG. 1 shows a state in which the oil separating disk 15 is attached to the support shaft 14. As mentioned above,
By externally fitting the engagement cylinder 18 of the oil separation disk 15 to the support shaft 14 and pushing it down, the tip of the lower engagement piece 21a of the engagement cylinder 18 engages with the groove 16 of the support shaft 14, and the upper engagement. The joint piece 21b engages with the upper end surface 14a of the support shaft 14.
Due to the elasticity of the engagement piece 21, the upper engagement piece 21b is moved to the support shaft 1
4, the upper end surface 14a of 4 is pushed down, and conversely, the lower engagement piece 21a pushes up the step portion 17 of the support shaft 14 upward, and clamps the tip end portion of the support shaft 14. As a result, the oil separation disk 15 is fixed to the tip of the support shaft 14.

Next, the operation of the compressor oil separator according to the present invention will be described based on the above structure. In the rotary compressor 1, the rotor 8 of the drive motor 5 rotates during operation, the rollers 11 of the compression device 6 rotate accordingly, and the gas fluid separated by the gas-liquid separator 3 is compressed in the compression chamber. Then, it flows upward through the gap between the rotor 8 of the drive motor 5 and the stator 7, and collides with the flange portion 19 of the oil separation disk 15. By colliding with the oil separation disk 19, oil components such as lubricating oil contained in the compressed gas are condensed on the lower surface of the flange portion 19 of the oil separation disk 15 and separated from the compressed gas.

As described above, the oil separation disk 15 has a protruding engagement piece 21 formed of a part of the wall of the oil separation disk 15.
Since it is fixed to the upper end portion of the support shaft 14 by means of, the fixing metal fitting for fixing the oil separation disk 15 is not required. As a result, the number of constituent parts is reduced and the structure is simplified, and the fine fixing metal fittings do not enter the inside of the casing 4 during the assembly of the rotary compressor 1 and cause a failure.

Further, since the projecting engagement piece 21 elastically engages with the upper end portion of the support shaft 14, the dimensional error of the step portion 17 of the support shaft 14 is elastically absorbed, so that the support shaft 14 itself is manufactured. Will be easier. Moreover, since the oil separation disk can be attached very easily, the compressor can be easily manufactured and assembled. In the above description, the support shaft 14
Although the ring-shaped groove 16 is formed in the tip portion of the support shaft 14 in order to form the step portion 17 in the tip portion, the groove may be formed at predetermined intervals. Further, it is also possible to provide a brim-shaped engaging projection and engage the protruding engaging piece 21 with this projection. Further, in the above embodiment, the entire oil separation disk 15 is formed by the elastic member, but only the portion having the protruding engagement piece 21 may be formed by the elastic member and the other portions may be formed by using the metal plate or the like. ..

[0016]

As is apparent from the above description, according to the oil separating device of the compressor of the present invention, the oil separating disk is integrally formed by the elastic member, and the protruding member is formed on a part of the inner wall of the oil separating disk itself. Since the coupling piece is formed and the protruding engagement piece fixes the oil separation disk to the support shaft, the fixing metal fitting for fixing the oil separation disk can be omitted, and the structure can be simplified. As a result, it is possible to prevent the fixing fitting from entering the casing and causing a failure. Further, since the protruding engagement piece of the oil separation disc can absorb the dimensional error of the step portion of the support shaft, the manufacturing of the support shaft is facilitated, and the oil separation disc is simply pressed against the tip of the support shaft. Since the separation disk can be fixed, it is possible to obtain a compressor that is easy to manufacture and assemble.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view showing a part of an oil separation device of a compressor of the present invention in which an oil separation disk is attached to a tip of a support shaft.

FIG. 2 is a vertical cross-sectional view showing the entire oil separation device of the compressor of the present invention.

FIG. 3 is an exploded sectional view of an oil separation disk and a support shaft according to the present invention.

FIG. 4 is a schematic diagram showing a support shaft of a conventional compressor, an oil separation disk, and a fixing member thereof in an exploded manner.

FIG. 5 is an enlarged sectional view showing a part of a conventional oil separation device of a compressor.

[Explanation of symbols]

 1 Rotary Compressor 4 Casing 5 Drive Motor 6 Compressor 8 Rotor 11 Roller 13 Rotating Shaft 14 Support Shaft 15 Oil Separation Disk 17 Step 18 Engaging Tube 19 Flange 20 Folding 21

Claims (1)

[Claims] 1. An oil in which a drive motor and a compression device are vertically and serially installed in a sealed casing, and a flange portion is projected above a rotor of the drive motor into a flow path of a compressed fluid. In a compressor oil separation device provided with a separation disk, a support shaft protruding perpendicularly to the upper end surface of the rotor is provided, and a step portion is formed on the outer peripheral surface of the upper end portion of the support shaft,
By the elastic member, the oil separation disk is integrally molded so as to have an engagement cylinder that is loosely fitted to the outer peripheral surface of the support shaft, and a flange portion that extends vertically from one end of the engagement cylinder, A plurality of protruding engagement pieces protruding from a part of the inner wall of the engagement cylinder are formed on the engagement cylinder of the oil separation disk, and these protruding engagement pieces are engaged with the upper end surface of the support shaft and the step portion. An oil separation device for a compressor, wherein the oil separation disk is fixed.