JPH10122166A - Scroll type fluid machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily position a scroll, and reduce a noise by interposing an elastic member, whose spring constant is small in the radial direction and large in the shaft direction, between a fixed support member and a connecting member to support an unturning scroll in the shaft direction to the fixed support member, and floatingly supporting the unturning scroll in the radial and shaft direction. SOLUTION: After an elastic member is particularly covered with and solidified by synthetic resin having high vibration damping performance by using a bolt as a core, a bolt of cutting work or a bolt by baking-molding rubber is used. A tight bolt suitable for positioning is fitted to and installed in two holes among plural installing holes 131, and in the residual holes, a clearance is arranged between them and the bolt, and vibration damping synthetic resin is integrally injected there. An unturning scroll 10 is joined with large elasticity (a small spring constant), that is, elastically in the radial direction by an elastic support device 80, and is joined with small elasticity (a large spring constant), that is, rigidly in the shaft direction. As a result, a scroll is easily positioned, and a noise is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll type fluid machine used as a compressor, an expander and the like, and more particularly to a low noise type scroll type fluid machine which supports a non-orbiting scroll in a radial direction. is there.

[0002]

2. Description of the Related Art Scroll type fluid machines are increasingly used as compressors for air conditioning and refrigeration, mainly because of their high efficiency and low noise operation. I have.

FIG. 8 is a longitudinal sectional view of a conventional scroll compressor. In the drawing, reference numeral 90 denotes a housing that wraps the entire apparatus, 30 denotes a casing fixed in the housing, 10 denotes a non-orbiting scroll supported by bolts or the like in the casing, and 20 denotes a casing that meshes with the non-orbiting scroll. A orbiting scroll that revolves orbits through a rotation preventing mechanism in the inside, 130 is an electric motor, 62 is a drive shaft supported by bearings of the casing 30, one end of which is connected to the electric motor, and the other end is a drive shaft that orbitally drives the orbiting scroll, 70. Is a compression chamber, 113 is a discharge port provided on the end plate of the non-orbiting scroll, 1102 is a suction pipe,
101 is a discharge pipe.

In the scroll compressor, a pair of scrolls 10 and 20 having a spiral body provided on an end plate are meshed with each other, and a plurality of compression chambers 70 are formed therein.
The orbiting scroll 20 has a drive shaft 6 having an eccentric shaft at its tip.
2 to orbit relative to the non-orbiting scroll 10. This swiveling motion causes the compression chamber 70
Moves from the outer suction port to the central discharge port 113, during which the volume gradually decreases to perform compression work. When used as an expander, when high-pressure gas is injected from the central discharge port 113, the orbiting scroll 2
0, the compression chamber 70 expands, and the drive shaft 62
The power is taken from.

[0005]

SUMMARY OF THE INVENTION In the scroll compressor, a pair of the above-mentioned mutually engaged scrolls 1 is provided.
In the compression process in which the pair of compression chambers 70 move sequentially between 0 and 20, the contact force generated between the scrolls is one of the noise sources of the compressor. Emits noise due to propagation to the surface of the machine housing. In particular, in a scroll compressor in which the two scrolls are brought into contact with each other to maintain the efficiency, thereby improving the airtightness of the compression chamber 70, the contact force is a main noise source.

In this case, both the non-orbiting scroll 10 and the orbiting scroll 20 vibrate due to the contact force generated between the scrolls. However, since the orbiting scroll 20 is supported by the bearing via the oil film and orbited, The vibration of the orbiting scroll is difficult to propagate. The non-orbiting scroll 10 is firmly attached to the casing 30 by bolts or the like. Therefore, the vibration of the non-orbiting scroll 10 easily propagates to the casing 30, and this causes noise. When this compressor rotates at high speed, the orbiting scroll 20
And the like, the centrifugal force of the turning element is increased, so that the contact force is increased, and the noise is significantly increased.

In order to solve this problem, if the non-orbiting scroll 10 is elastically supported on the casing 30 to reduce the propagation of the exciting force, the vibration on the compressor surface is reduced and the noise is reduced. Can be reduced. Regarding such a configuration, Japanese Patent Application Laid-Open No. 5-65883 discloses that the hermeticity in the radial direction is reduced as shown in FIG. 9 (longitudinal sectional view of a scroll compressor) and FIG. 10 (XX sectional view of FIG. 9). For the purpose of holding, there has been proposed a structure in which an annular wall A of the non-orbiting scroll 10 is floatingly supported on a housing 90 via an elastic body B, screws C and D, and a support member E.

This technique can be expected to have the same effect as the present invention to some extent. However, in terms of stability during scroll operation, performance maintenance, and noise reduction, the relative position of the non-orbiting scroll 10 and the orbiting scroll 20 can be accurately determined. I have to say that it is not enough for the need to match. For this reason, it is necessary to provide a configuration that can precisely adjust the relative positions and elastically support the relative positions so as to prevent the excitation force generated between the wraps of the pair of scrolls from propagating to the casing 30 via the non-orbiting scroll 10. .

The present invention solves such a problem of the prior art, and the non-orbiting scroll 10 is attached to a casing 30 as a connecting part of the non-orbiting scroll 10 in a vibration-proof manner, thereby positioning the scroll. It is intended to make it easier and reduce noise.

[0010]

According to the present invention, there is provided a non-orbiting scroll axially supported by a fixed support member, and a non-orbiting scroll meshed with the non-orbiting scroll to prevent rotation. The present invention relates to a scroll-type fluid machine including a orbiting scroll driven to revolve around the non-orbiting scroll via a non-orbiting scroll through the following.

(1) Between the fixed support member and a connecting member that supports the non-orbiting scroll in the axial direction with respect to the fixed support member, the spring constant in the radial direction is small and the spring constant in the axial direction is large. The non-orbiting scroll was floatingly supported in the radial direction and the axial direction by interposing an elastic member.

(2) In the scroll-type fluid machine according to the above mode (1), the connection member is a bolt, the elastic member is fitted outside the bolt, and the non-orbiting scroll is connected to the fixed support member. did.

(3) In the scroll type fluid machine according to the above mode (1) or (2), one of the connection member and the elastic member is provided with a cut for reducing a spring constant in a radial direction.

(4) A plurality of protrusions extending from the outer peripheral portion of the fixed support member to the outer peripheral position of the non-orbiting scroll are formed integrally with the fixed support member, and are opposed to the outer periphery of the non-orbiting scroll. An elastic member having a small spring constant in the radial direction and a large spring constant in the axial direction is interposed between the inner surface of the projecting portion and the non-orbiting scroll in a floating manner in the radial and axial directions.

(5) In the scroll-type fluid machine according to the above mode (4), a mounting member is integrally provided on the elastic member, and the elastic member is attached to the outer periphery of the non-orbiting scroll by the mounting member. It was interposed and supported in the gap between the opposing inner surface of the protrusion.

[0016]

FIG. 1 is a longitudinal sectional view of a scroll compressor according to a first embodiment of the present invention. In the figure,
90 is a housing, 93 is a partition plate for partitioning the upper part in the housing, 101 is one high-pressure chamber partitioned by the partition plate,
102 is the other low-pressure chamber, 30 is a casing fixed to the low-pressure chamber in the housing, 10 is a non-orbiting scroll mounted on the casing, 11 is an end plate of the non-orbiting scroll, and 12 is a non-orbiting scroll A spiral wrap of the scroll, 13 is a part of the non-orbiting scroll, and a mounting portion for mounting the non-orbiting scroll to the casing 30; 80 is an elastic supporting device for mounting the non-orbiting scroll to the casing; An orbiting scroll that orbits between the scroll 10 and the casing 30;
Is an end plate of the orbiting scroll, 22 is a spiral wrap of the orbiting scroll, 40 is a thrust bearing provided on the casing 30 for receiving the thrust of the orbiting scroll, and 50 is the orbit of the orbiting scroll to prevent rotation. The rotation preventing mechanism 31 is provided with a rotating bearing provided on the casing 30,
Is a drive shaft supported by the rotary bearing, 130 is an electric motor, 131 is a stator of the electric motor, 132 is a rotor of the electric motor, and this rotor is connected to the drive shaft. 621 is an eccentric shaft provided at the upper end of the drive shaft;
1 is an eccentric bearing provided between the eccentric shaft and the orbiting scroll, 113 is a discharge port provided on an end plate of the non-orbiting scroll, 1101 is a discharge pipe provided on the upper end of the housing, 1102 is provided on a side surface of the housing. It is a suction pipe.

FIG. 2 is an enlarged vertical sectional view of a connection portion between the non-orbiting scroll and the casing in the above embodiment. In the drawing, reference numeral 30 denotes a casing, 10 denotes a non-orbiting scroll, 13 denotes a mounting portion of the non-orbiting scroll, and 131 denotes mounting holes provided in the mounting portion. Reference numeral 81 denotes a bolt fitted in the mounting hole 131 to attach the non-orbiting scroll 10 to the casing 30, and reference numeral 82 denotes an elastic member that fills a gap between the bolt 81 and the mounting hole 131. Reference numeral 81,
The elastic support device 80 is constituted by the portion marked 82.

The elastic support device 80 is as follows. (A) The elastic member 82 is made of a synthetic resin, particularly a synthetic resin having a high vibration damping property. (B) Of the plurality of mounting holes 131, two of the mounting holes 131 are fitted with tight bolts suitable for positioning, and the remaining holes are provided with gaps between the bolts and the vibration-damping synthetic resin is inserted therein. It may be injected and integrated. (C) Rubber may be used instead of the synthetic resin in the synthetic resin-coated bolt, and a bolt formed by baking the rubber may be used. (D) In the above cases (a) and (c), if the relationship between the hole and the shaft is a relationship between the tapered hole and the tapered shaft, the gap can be easily adjusted, so that accurate positioning and elastic support can be achieved. Both will be possible.

The non-orbiting scroll 10 is elastically connected to the end face of the casing 30 with a large elasticity (small spring constant), that is, elastically in the radial direction, and small in the axial direction (spring). (Large constant), that is, rigidly connected. As a result, the vibration is reflected at the coupling portion having a small spring constant in the radial direction, and is attenuated by the vibration damping effect of the elastic body 82, so that the vibration propagating to the housing is suppressed, and the noise radiated from the housing is reduced. .

FIG. 3 is a longitudinal sectional view of a connection portion between a non-orbiting scroll and a casing of a scroll compressor according to a second embodiment of the present invention, and FIG. 4 is a sectional view taken along line AA of FIG. In the figure, reference numeral 81A denotes a bolt cut out so that a part of its length becomes at least one parallel plane 811 parallel to the axis, and 82A denotes an elastic body covered around the bolt. The mounting is set such that the parallel plane 811 is tangential to the circumference. The elastic support device 80A of the present embodiment is composed of the above 81A and 82A. The configuration of other parts is the same as that of the first embodiment.

According to the above configuration, the elasticity in the radial direction is further reduced as compared with that of the first embodiment, and a larger vibration damping effect and a larger noise reducing effect can be obtained.

FIG. 5 is a cross-sectional view of a non-orbiting scroll elastic support device 80B of a scroll compressor according to a third embodiment of the present invention. In the figure, reference numeral 82B denotes an elastic body mounted on the outer periphery of a bolt 81 (same shape as the bolt of the first embodiment), which is provided with a cut 821 on its inner surface. It is mounted so that this cut is in the radial direction. Such a cut may be provided in the elastic body 82A of the above-described second embodiment. This cut may be provided in the bolt. The configuration of other parts is the same as that of the first embodiment.

Since such radial cuts 821 make the elasticity in the radial direction smaller, the effect of reducing vibration propagation becomes more remarkable, and the effect of further reducing noise is obtained.

FIG. 6 is a longitudinal sectional view of a scroll compressor according to a fourth embodiment of the present invention. In the drawing, reference numeral 14 denotes an annular wall on the outer periphery of the non-orbiting scroll 10, 30A denotes a casing, and 32 denotes a housing 90
Annular wall 1 on the outer periphery of the non-orbiting scroll along the inner surface of
There are a plurality of protrusions extending upward to the opposing position of 4, and are formed integrally with the casing.
80C is an elastic supporting device mounted between the outer periphery of the annular wall 14 of the non-orbiting scroll and the inner surface of the protruding portion 32 opposed thereto.

FIG. 7 is a cross-sectional view of the non-orbiting scroll elastic support device 80C. 83 is an L-shaped mounting member, 8
2C is an elastic member made of hard rubber or a polymer material integrally formed with the attachment member 83, and 84 is an attachment member 83
Are bolts to be attached to the protrusions 32. Code 82
An elastic support device 80C of the present embodiment is constituted by the portions with C, 83 and 84. The configuration of other parts is the same as that of the first embodiment.

The elastic member 82C is made of a material having a small spring constant in the radial direction and a large spring constant in the axial direction. As a result, the non-orbiting scroll is floatingly supported in the radial direction and the axial direction. That is, the positioning and the floating support are satisfied at the same time, and the effect of noise reduction is produced.

[0027]

According to the scroll type fluid machine of the present invention, the non-orbiting scroll is supported in the radial and axial directions by interposing an elastic member having a small radial spring constant and a large axial spring constant. Therefore, noise can be reduced by means for easily positioning the scroll.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a scroll compressor according to a first embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of a connection portion between a non-orbiting scroll and a casing in the embodiment.

FIG. 3 is a longitudinal sectional view of a connection portion between a non-orbiting scroll and a casing of a scroll compressor according to a second embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a cross-sectional view of a non-orbiting scroll elastic support device of a scroll compressor according to a third embodiment of the present invention.

FIG. 6 is a vertical sectional view of a scroll compressor according to a fourth embodiment of the present invention.

FIG. 7 is a cross-sectional view of the non-orbiting scroll elastic support device in the embodiment.

FIG. 8 is a longitudinal sectional view of a conventional scroll compressor.

FIG. 9 is a longitudinal sectional view of another example of the conventional scroll compressor.

FIG. 10 is a sectional view taken along line XX of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Non-orbiting scroll 11 End plate 113 Discharge port 12 Lap 13 Mounting part 131 Mounting hole 14 Annular wall 20 Orbiting scroll 21 End plate 22 Lapping 30, 30A Casing 31 Rotation bearing 32 Projection 40 Thrust bearing 50 Automatic blocking mechanism 61 Eccentric bearing 62 Drive shaft 621 Eccentric shaft 70 Compression chamber 80, 80A, 80B, 80C Elastic support device 81, 81A Bolt 811 Parallel surface 82, 82A, 82B, 82C Elastic member 821 Radial cut 83 L-shaped mounting member 84 Support bolt 90 Housing 93 Partition plate 101 High pressure chamber 102 Low pressure chamber 1101 Discharge pipe 1102 Suction pipe 130 Motor 131 Stator 132 Rotor

Claims (5)

[Claims] A non-orbiting scroll axially supported by a fixed support member; and a non-orbiting scroll meshed with the non-orbiting scroll and driven to revolve around the non-orbiting scroll via a rotation preventing mechanism. A scroll-type fluid machine comprising: a fixed spring member and a connecting member that supports the non-orbiting scroll in the axial direction with respect to the fixed support member; A scroll-type fluid machine wherein the non-orbiting scroll is supported in a floating manner in a radial direction and an axial direction by interposing an elastic member having a large constant. 2. The scroll-type fluid according to claim 1, wherein said connection member is a bolt, said elastic member is fitted outside said bolt, and a non-orbiting scroll is connected to said fixed support member. machine. 3. The scroll-type fluid machine according to claim 1, wherein a cut is provided in one of the connection member and the elastic member to reduce a spring constant in a radial direction. 4. A non-orbiting scroll axially supported by a fixed support member, and a non-orbiting scroll meshed with the non-orbiting scroll and driven to orbit around the non-orbiting scroll via a rotation preventing mechanism. And a plurality of protrusions extending from the outer peripheral portion of the fixed support member to the outer peripheral position of the non-orbiting scroll are formed integrally with the fixed support member, and the same outer periphery as the outer periphery of the non-orbiting scroll. An elastic member having a small spring constant in the radial direction and a large spring constant in the axial direction is interposed between the inner surface of the protruding portion and the non-orbiting scroll to support the non-orbiting scroll in the radial and axial directions. A scroll type fluid machine characterized by the above-mentioned. 5. An attachment member is provided integrally with said elastic member, and said attachment member interposes said elastic member in a gap between an outer periphery of said non-orbiting scroll and an inner surface of said protruding portion facing said outer periphery. 5. The device according to claim 4, wherein the device is supported.
3. The scroll type fluid machine according to item 1.