JPH08210276A - Scroll compressor - Google Patents

Abstract

PURPOSE: To provide a high-efficient open type scroll compressor which is constituted to improve an amount of lubrication oil fed to a shaft sealing device and improve sealability and reliability of the shaft sealing device. CONSTITUTION: A plurality of passage grooves 25 are formed in the side wall surface of a cylindrical frame 21, formed in a compressor housing 1, for a rolling type main bearing 14 to support a main shaft 16 in a compressor housing 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open type scroll compressor used for air conditioners, refrigerators and the like.

[0002]

2. Description of the Related Art Recent compressors for vehicle air conditioners are compact and lightweight, have high efficiency, have low noise, and are subject to severe operating conditions such as operation of vehicles at extremely high and low temperatures and wide range of rotation speed changes. Durability is required.

As a conventional example of the structure of a typical scroll type compressor, a scroll type fluid machine of Japanese Patent Publication No. 57-49721 and a scroll type compressor of Japanese Patent Publication No. 58-19875 are disclosed.

A cross-sectional view of a conventional compressor is shown in FIG. Fixed swirl vane component 102 having fixed swirl vanes 104 formed on fixed end plate 103 is fixed to the rear end portion of compressor housing 101, and swirling that meshes with fixed swirl vanes 104 to form a plurality of compression work spaces 105. A swirl vane 108 is formed, and a swirl swirl vane component 106 in which a swirl bearing 110 is disposed is arranged inside a boss 109.

A thick disk-shaped or short shaft-shaped eccentric bush 111 having an eccentric hole 112 is rotatably fitted in the orbiting bearing 110, and the eccentric hole 11 of the eccentric bush 111 is rotatably fitted.
An eccentric shaft 115, which is eccentrically extended from the end surface of the main shaft 114 in the axial direction, is fitted into and coupled to the inside of the main shaft 114.
Give a swirling motion to. The rotation of the swirling spiral blade part 106 is restricted by the rotation restricting part 124. The main shaft 114 is formed of a large diameter portion 116 and a small diameter portion 117, and the large diameter portion 116 is the main bearing 118 and the small diameter portion 117 is the sub bearing 1 so that the main shaft 114 can rotate in the compressor housing 101.
At 19, support. A shaft seal device 120 is arranged in the compressor housing 101 between both bearings of the main shaft 114.

Due to the swirling motion of the swirling spiral blade part 106, the gas is compressed from the suction port (not shown) by the working space 105.
High pressure on the side of the discharge port 123, which is blocked by the check valve 121 and is gradually compressed toward the center portion as the compression work space 105 moves toward the center of the spiral while decreasing its volume. Compress work space 10 from chamber pressure
When the pressure in the vicinity of the center of 5 becomes large, the check valve 121 is pushed open and discharged through the discharge port 123.

[0007]

In the conventional compressor as described above, the atmosphere of the shaft sealing device 120 is blocked by the large diameter portion 116 of the main shaft 114 and the rolling type main bearing 118 in the communication space with the suction space, and lubrication is performed. Since the oil supply path was not sufficiently secured, the lubricating oil was insufficient, and abnormal wear occurred in the shaft sealing device 120, which could cause gas leakage. Therefore, the atmosphere of the shaft sealing device 120 becomes a closed space in which the lubricating oil does not flow back, the friction between the shaft sealing device 120 and the main shaft 114 increases due to the lack of the lubricating oil, and the mechanical efficiency deteriorates.
There was a problem in terms of sealing property and durability due to fatigue of No. 20.

The present invention solves the above-mentioned problems of the conventional example, and improves the supply amount of lubricating oil to the shaft sealing device, and improves the sealing performance and reliability of the shaft sealing device, thus providing a highly efficient open scroll. The purpose is to provide a compressor.

[0009]

SUMMARY OF THE INVENTION In order to solve the above problems, according to the present invention, a rolling type main bearing for supporting a main shaft in a compressor housing is press-fitted and fixed to a cylindrical frame formed in the compressor housing. A plurality of passage grooves are formed on the side wall surface of the frame.

Further, according to the present invention, a rolling type main bearing that supports a main shaft in a compressor housing is press-fitted and fixed to a cylindrical frame formed in the compressor housing, and the main bearing is sandwiched between the main mechanism and the compression mechanism side. A through hole communicating with the shaft sealing device side is formed inside the main shaft.

[0011]

According to the first technical means of the present invention, by disposing a plurality of passage grooves in the side wall surface of the cylindrical frame of the compressor housing of the main bearing that supports the main shaft, the shaft is removed from the suction space. A communication passage is formed in which the lubricating oil is supplied to the atmosphere of the sealing device through a plurality of passage grooves, so that the lubricating oil is prevented from being blocked in the atmosphere of the shaft sealing device and the lack of the lubricating oil is eliminated. By supplying the lubricating oil, friction and wear of the shaft sealing device are reduced, the shaft sealing device has a good sealing property, and reliability is obtained by the effect of preventing deterioration of the shaft sealing device. Further, the lubricity of the shaft seal device due to the circulation of the lubricating oil is improved, and the effect of reducing mechanical loss can be expected.

Further, according to the second technical means of the present invention, the through hole for connecting the compression mechanism side and the shaft sealing device side with the main bearing interposed is provided inside the main shaft, so that the inside of the compressor housing is improved. A communication path between the compression mechanism side and the shaft sealing device side is formed, and the lubricating oil supplied from the suction space is sent to the peripheral space on the shaft sealing device side through the passage hole of the main shaft of the compression mechanism side in the compressor housing. A recirculation path between the compression mechanism side and the peripheral space on the shaft sealing device side is formed to prevent the lubricating oil from closing in the peripheral space on the shaft sealing device side, and the lubricating oil is supplied to eliminate the lack of lubricating oil. . Therefore, the circulation of the lubricating oil is facilitated, the sealability and lubricity of the shaft sealing device are improved, the mechanical efficiency is improved,
Reliability is enhanced by the effect of preventing deterioration of the shaft sealing device due to supply of lubricating oil.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment using the first technical means of the present invention, FIG. 1 is a sectional view of a scroll compressor.

A fixed spiral vane component 4 and a plurality of compression working spaces 10 are swirled inside a compressor housing 1 consisting of a front casing 2 on which a low pressure is applied and a rear casing 3 on which a high pressure is applied. The spiral vane components 7 are intermeshed with each other.

The fixed spiral blade component 4 has a fixed spiral blade 6 extending from one surface of the fixed mirror plate 5, and the fixed mirror plate 5 is fastened and fixed to the rear casing 3. The swirling spiral blade component 7 extends a swirl spiral blade 9 on one surface of the swirl mirror plate 8, and the swirl mirror plate 8 on the opposite side of the extending surface of the swirl spiral blade 9 of the swirl mirror plate 8.
A cylindrical boss 11 is projectingly provided in the center of the back surface, and a slewing bearing 12 (needle bearing) is provided inside the boss 11.
Is arranged. Tip seals 13 are inserted into the tip surfaces of the fixed spiral blade 6 and the swirl spiral blade 9, respectively, to ensure axial sealing performance.

An eccentric bush 18 is rotatably fitted to a swivel bearing 12 arranged and fixed in a boss 11 of a swirl spiral vane component 7, and a rolling type main bearing 14 and a rolling type auxiliary bearing 15 are attached to the compressor housing 1. Spindle 1 supported rotatably
The eccentric shaft 17 is eccentrically extended from the end face of the shaft 6 in parallel with the shaft by an amount of eccentricity corresponding to the turning radius. The swirling movement of the swirling spiral vane component 7 is provided by this configuration.
The swirling spiral blade component 7 performs only a swirling motion while being prevented from rotating by the rotation restraining component 20.

The swirling motion of the swirling spiral blade component 7 moves the compression work space 10 toward the center of the spiral while reducing its volume. Along with this, the gas flowing into the compression work space 10 through the suction port (not shown) is compressed, and the check valve 23 is discharged from the discharge port 22 formed in the fixed spiral vane component 4.
Is pushed open to be discharged into the discharge cavity 24, and flows out through a discharge port (not shown).

The main shaft has a rolling type main bearing 14 and a sub bearing 15.
The main bearing 14 is rotatably supported by the compressor housing 1 via a cylindrical frame 21 formed in the compressor housing 1, and the sub-bearing 15 is cylindrically opened at the end of the compressor housing 1. It is press-fitted and fixed to the sleeve 22. A shaft sealing device 30 is arranged between the main bearing 14 and the sub bearing 15 with the main shaft 16 penetrating therethrough.

A plurality of passage grooves 2 are formed in the side wall surface of a cylindrical frame 21 formed in the compressor housing 1 of the rolling type main bearing 14 which supports the main shaft 16 in the compressor housing 1.
By disposing 5, the shaft sealing device 30 from the suction space
A communication passage through which the lubricating oil is supplied to the atmosphere through a plurality of passage grooves 25 is formed to prevent the lubricating oil from being clogged in the atmosphere of the shaft sealing device 30 and eliminate the lack of the lubricating oil. By supplying the lubricating oil, friction and wear of the shaft sealing device 30 are reduced, the shaft sealing device 30 has a good sealing property, and the effect of preventing deterioration of the shaft sealing device 30 is reliability.

Next, an embodiment using the second technical means of the present invention will be described with reference to the sectional view of the scroll compressor shown in FIG. Since the compression mechanism section is the same as that of the above-mentioned embodiment, its explanation is omitted.

By providing a through hole 26 for communicating the compression mechanism side and the shaft sealing device 30 side with the rolling type main bearing 14 for supporting the main shaft 16 in the compressor housing, the through hole 26 is provided inside the main shaft 16. A communication passage between the compression mechanism side in the compressor housing 1 and the shaft sealing device 30 side is formed, and the lubricating oil supplied from the suction space is sealed from the passage hole of the main shaft 16 on the compression mechanism side in the compressor housing 1 through the shaft seal. The lubricating oil is sent to the peripheral space on the side of the device 30 to form a reflux path between the compression mechanism side and the peripheral space on the side of the shaft sealing device 30 to prevent the lubricating oil from clogging the peripheral space on the side of the shaft sealing device 30. Is supplied to solve the shortage of lubricating oil. Therefore, the circulation of the lubricating oil is facilitated, the sealing property and lubricity of the shaft sealing device 30 are improved, the mechanical efficiency is improved, and the durability is enhanced by the effect of preventing the deterioration of the shaft sealing device 30 due to the supply of the lubricating oil.

[0022]

As is apparent from the above description, according to the present invention, a plurality of rollers are provided on the side wall surface of the cylindrical frame formed in the compressor housing of the rolling type main bearing that supports the main shaft in the compressor housing. By arranging the passage grooves of the above, a communication passage is formed in which the lubricating oil is supplied from the suction space to the atmosphere of the shaft sealing device through a plurality of passage grooves, thereby preventing the lubricating oil in the atmosphere of the shaft sealing device from being blocked. However, the lack of lubricating oil is resolved.
The supply of lubricating oil reduces friction and wear of the shaft seal device,
A good sealing property is obtained for the shaft sealing device, and reliability is obtained by the effect of preventing deterioration of the shaft sealing device. Further, the lubricity of the shaft seal device due to the circulation of the lubricating oil is improved, and the effect of reducing mechanical loss can be expected.

Further, by providing a through hole for communicating the compression mechanism side and the shaft sealing device side with the rolling type main bearing supporting the main shaft in the compressor housing, the through hole is provided inside the main shaft. A communication passage between the compression mechanism side and the shaft sealing device side is formed, and the lubricating oil supplied from the suction space is sent to the peripheral space on the shaft sealing device side from the passage hole of the main shaft of the compression mechanism side in the compressor housing. A recirculation path is formed between the compression mechanism side and the peripheral space on the shaft sealing device side to prevent the lubricating oil from being blocked in the peripheral space on the shaft sealing device side, and the lubricating oil is supplied.
The lack of lubricating oil is resolved. Therefore, the circulation of the lubricating oil is facilitated, the sealing property and lubricity of the shaft sealing device are improved, the mechanical efficiency is improved, and the reliability is enhanced by the effect of preventing the deterioration of the shaft sealing device due to the supply of the lubricating oil.

[Brief description of drawings]

FIG. 1 is a sectional view of a scroll compressor showing a first embodiment of the present invention.

FIG. 2 is a sectional view of a scroll compressor showing a second embodiment of the present invention.

FIG. 3 is a sectional view of a scroll compressor showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor housing 4 Fixed swirl vane 5 Fixed end plate 6 Fixed swirl vane part 7 Swirling swirl vane 8 Swirling end plate 9 Swirling swirl vane part 10 Compression work space 11 Boss 14 Main bearing 12 Spindle bearing 16 Spindle 20 Rotation restraint part 21 Frame 25 Passage Groove 26 Through hole 30 Shaft sealing device

Claims (2)

[Claims] 1. A fixed spiral vane component having a fixed spiral vane extending over a fixed mirror plate inside a compressor housing, and a swirl mirror plate so as to form a plurality of compression work spaces by engaging with the fixed spiral vane component. A swirl spiral vane component having a swirl spiral vane extending over the main shaft, a main shaft supported by a rolling bearing in the compressor housing via a shaft sealing device, and imparting a swirl motion to the swirl spiral vane component; A compression mechanism is configured by a rotation restraint component that restrains the rotation of the swirling spiral blade component to only rotate, and the rolling-type main bearing that supports the spindle in the compressor housing is formed in the compressor housing. A scroll compressor, wherein the scroll compressor is press-fitted and fixed to a cylindrical frame, and a plurality of passage grooves are formed on a side wall surface of the frame. 2. A fixed spiral vane component having a fixed spiral vane extending over a fixed mirror plate inside a compressor housing, and a swirl mirror plate so as to form a plurality of compression work spaces by engaging with the fixed spiral vane component. A swirl spiral vane component having a swirl spiral vane extending over the main shaft, a main shaft supported by a rolling bearing in the compressor housing via a shaft sealing device, and imparting a swirl motion to the swirl spiral vane component; A compression mechanism is formed by a rotation restraint component that restrains the rotation of the swirling spiral blade component to only rotate, and a rolling-type main bearing that supports the spindle in the compressor housing is formed in the compressor housing. A scroll compressor, which is press-fitted and fixed to a cylindrical frame, and has a through hole formed inside the main shaft to communicate the compression mechanism side and the shaft sealing device side with the main bearing interposed therebetween.