JPH08210270A - Scroll compressor - Google Patents

Abstract

PURPOSE: To ensure high reliability for a long period and to reduce cost by improving the fixed structure of a vortex-form wear resisting plate fitted in the bottoms of two spiral vane parts. CONSTITUTION: A wear resisting plate 31 having a plurality of claw parts 32 formed at a spiral edge is fitted in the bottoms of two spiral vane parts 4 and 7 in such a state to correspond to a plurality of notch grooves 33 formed as the insertion groove of the claw part 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing a wear resistant plate disposed on the bottom surface of a spiral blade of a scroll compressor used in an air conditioner, a refrigerator, etc.

[0002]

2. Description of the Related Art Recent compressors for vehicle air conditioners are compact and lightweight, have high efficiency, have low noise, etc., and have 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.

From the viewpoint of high efficiency, it is necessary to reliably seal the compression work chamber. Therefore, U.S. Pat. No. 3,994,636 proposes a structure in which a seal member provided on the end surface of the spiral blade is used to ensure the sealing. However, there is a problem of wear due to the seal member, and there is a problem such as when the spiral blade member is made of aluminum or the like, particularly for weight reduction. In order to solve such a problem, it has been proposed in Japanese Utility Model Laid-Open No. 56-147836 to dispose a wear resistant plate on the bottom surface of a spiral blade.

FIG. 4 is a sectional view of a conventional compressor using the eccentric bushing mechanism, and FIG. 5 is a front view of a fixed spiral vane component and a wear resistant plate fitted thereto.

A fixed spiral vane component 102, in which a fixed spiral vane 104 is formed on a fixed end plate 103 at the rear end of a compressor housing 101, is fastened and fixed by an end face of a cylindrical partition wall 113, and a plurality of compression work spaces 105 are formed. A swirling spiral blade component 106 in which swirling spiral blades 108 are formed on the swirling end plate 107 so as to be configured is meshed.

A cylindrical boss 1 is provided on the rear surface of the swiveling end plate 107.
09 is formed, and the slewing bearing 110 is arrange | positioned in the inside. A thick disk-shaped or short shaft-shaped eccentric bush 111 having an eccentric hole 112 is fitted into the slewing bearing 110 and rotatably supported. In the eccentric hole 112 of the eccentric bush 111, an eccentric shaft 115 axially eccentrically extending from the end surface of the main shaft 114 is fitted, and gives a swirling motion to the swirling spiral blade part 106, and as a result, the gas is compressed in the working space. When the compression work space 105 is sucked into 105 and moves toward the center of the spiral while the volume of the compression work space 105 decreases, the work space 105 is gradually compressed to the vicinity of the central portion, and is blocked by the check valve 121 on the side of the discharge port 123. When the pressure in the vicinity of the center of the compression work space 105 is higher than the pressure in the high pressure chamber, the check valve 12
1 is pushed open and is discharged through the discharge port 123.

The axial seal of the compressed gas from the compression work space 105 is fixed to the fixed spiral blade 104 and the swirl spiral blade 108.
The tip seal 124 provided at the tip of the
In order to prevent the wear of the spiral blades 104, 108 due to the tip seal 124, a spiral abrasion-resistant plate 125 arranged so as to cover the space between the spiral blades 104, 108 on the bottom surface of the spiral blade components 102, 106 is provided. At one place near the end of the spiral blade of the wear plate 125, the spiral wear-resistant plate 125 is attached to the spiral blade parts 102 and 106, and the fastening component 10 such as a bolt.
It is fastened and fixed by 0.

[0009]

However, in the conventional compressor as described above, since only one place near the end of the spiral blade of the wear-resistant plate 125 is fastened with the bolt 100 or the like, the swirl spiral during operation is required. The fixed state of the wear resistant plate 125 becomes unstable due to the turning motion of the blade component 106, and interference occurs between the edge of the wear resistant plate 125 and the roots of the wall surfaces of both spiral blades 104 and 108, and the root of the wall surface. May be scraped off, the stress at the root portion due to the notch effect may increase, and the spiral blade may be damaged from the root portion. Further, since the fastening components 100 such as bolts are tightened, the fastening components 100 such as bolts loosen under severe operating conditions such as high rotation speed, and the fastening components 100 are caught in the compression work space 105, which causes a problem in reliability. .

Further, the conventional method of fixing the wear resistant plate 125 is disadvantageous in that the fastening parts 100 are required, the number of parts increases, and the cost increases.

The present invention solves the above-mentioned problems of the prior art, and an object of the present invention is to provide a scroll compressor which can secure high reliability for a long period of time and is low in cost.

[0012]

In order to solve the above-mentioned problems, the present invention is a scroll compressor in which spiral wear-resistant plates are fitted on the bottom surfaces of both spiral blade parts, and a plurality of them are provided at the edges of the wear-resistant plates. Is provided, and a plurality of cutout grooves are formed on the bottom surface of both spiral blade parts as insertion grooves of the claw portion.

[0013]

According to the present invention, in the scroll compressor, a plurality of claw portions are provided on the edge of the wear resistant plate, and a plurality of notch grooves are provided on the bottom surface of both spiral blade parts as insertion grooves of the claw portions. By fitting the wear resistant plate to the bottom of the spiral blade component and securely fixing it at multiple points, interference between the edge of the wear resistant plate and the root of the spiral blade wall is prevented, and the edge of the wear resistant plate is prevented. The reliability of the root portion of the wall surface of the spiral blade can be further improved.

Further, the fastening parts for fixing the wear resistant plate to both the spiral vane parts are not required, and the number of parts can be reduced.

[0015]

1 is a cross-sectional view of a scroll compressor, FIG. 2 is a perspective view of a spiral blade component and a wear-resistant plate, and FIG. 3 is a front view of a swirling spiral blade component.

A swirl spiral is formed 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 so that a fixed spiral vane 6 and a plurality of compression working spaces 10 are formed. The blades 9 are meshed with each other.

The fixed spiral blade component 4 has a fixed spiral blade 6 extending on 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.

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 to form a 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.
Further, the swirling spiral blade component 7 only performs a swirling motion while being prevented from rotating by the rotation restraining component 20.

The swirling motion of the swirling spiral vane component 7 causes the compression work space 10 to move 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 pushed open from the discharge port 22 formed in the fixed spiral vane component 4 to discharge the discharge cavity. It is discharged to the tee 24 and flows out through a discharge port (not shown).

A tip seal 13 provided at the tip of the fixed spiral blade 6 and the swirl spiral blade 9 seals the compressed gas from the compression work space 10 in the axial direction. In order to prevent the wear of the abrasion resistant plate 9, a plurality of claws 32 are formed on the spiral edge of the wear resistant plate 31.
Is fitted to the bottom surfaces of both spiral blade parts 6, 9 in correspondence with the plurality of notch grooves 33 formed as the insertion grooves of the claw portion 32. By securely fixing at a plurality of points, interference between the edge of the wear resistant plate 31 and the roots of the wall surfaces of the spiral blades 6 and 9 is prevented, and reliability is improved.

Further, a fastening part for fixing the wear resistant plate 31 to both the spiral blade parts 4 and 7 is unnecessary, and a low-cost scroll compressor having a small number of parts can be realized.

[0022]

As is apparent from the above description, according to the present invention, a plurality of claws are provided on the edge of the wear-resistant plate, and a plurality of notches are formed in the bottom surface of both spiral blade parts as insertion grooves for the claws. By arranging grooves and fitting wear resistant plates to the bottoms of both spiral blade parts and securely fixing them at multiple points, interference between the edges of the wear resistant plates and the roots of the spiral blade wall surfaces is prevented. , The durability of the edge of the wear-resistant plate and the root of the wall surface of the spiral blade is improved, and the reliability is improved.

Further, the fastening parts for fixing the wear resistant plate to both the spiral blade parts are not required, the number of parts can be reduced, and it is advantageous in terms of cost.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a spiral blade component and a wear-resistant plate according to an embodiment.

FIG. 3 is a front view of a swirling spiral blade component according to an embodiment.

FIG. 4 is a sectional view of a scroll compressor showing a conventional example.

FIG. 5 is a front view of a fixed spiral blade component and a wear-resistant plate fitted to the component in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor housing 4 Fixed swirl vane part 5 Fixed end plate 6 Fixed swirl vane 7 Swirling swirl vane part 8 Swirling end plate 9 Swirling swirl vane 10 Compression working space 16 Spindle 20 Spinning restraint part 31 Wear resistant plate 32 Claw part 33 Notch groove

Claims (1)

[Claims] 1. Inside a compressor housing, a fixed spiral vane component having a fixed spiral vane extending on a fixed mirror plate, and a swirl mirror plate meshing with the fixed spiral vane component to form a plurality of compression working spaces. A compression mechanism composed of a swirl spiral blade part extending from a swirl spiral blade, a main shaft for giving swirl motion to the swirl spiral blade part, and a rotation restraint part constraining rotation of the swirl spiral blade part to rotate only. In a scroll compressor in which a spiral wear-resistant plate is fitted on the bottom surfaces of both spiral blade parts, a plurality of claws are provided at the edges of the wear-resistant plate, and the both spirals are used as insertion grooves for the claws. A scroll compressor having a plurality of notched grooves formed on the bottom surface of a blade component.