JP2008223771A - Method for assembling scroll compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a connection member at low cost and making assembly of a scroll compressor simple. <P>SOLUTION: A plurality of L-shaped or roughly L-shaped spring materials including bottom parts having bolt holes formed thereon and a side wall parts erectly provided with being bent from the bottom part are arranged around a compressor assembly with keeping intervals and putting the bottom part between a first frame of the compressor assembly and a drive element. The spring material is positioned in relation to the compressor assembly with using an annular positioning member surrounding the compressor assembly. The spring material is temporarily fixed on the compressor assembly by a through bolt inserted in a screw hole of a first frame through a through hole formed on a support element, a through hole formed on the drive element and a bolt hole from the support element side. The compressor assembly on which the spring material is temporarily fixed is put in a compression vessel, and an upper part of a spring material of the spring material side wall part is abutted on a compression vessel inner surface and the spring material is fixed on the compressor assembly by fastening the through bolt. The compressor assembly is joined to the compression vessel by welding the upper part of the spring material side wall part and the compression vessel inner surface. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hermetic scroll compressor for gas compression.

  10 to 12 are diagrams relating to, for example, a conventional scroll compressor disclosed in Patent Document 1 below, in which 1 is a sealed container, 2 is a compression element composed of a fixed scroll, a swing scroll, and the like. Is an electric motor and a driving element constituted by parts such as a main shaft for transmitting the driving force of the electric motor, 4 is a supporting element constituted by parts such as a frame for supporting parts such as the main shaft, and 5 is a compression element 2 and a driving element 3 A compressor assembly 6 </ b> A constituted by the support element 4 is a cup-shaped coupling member that couples the hermetic container 1 and the compressor assembly 5. The coupling member 6A has a plurality of integrally formed side wall portions 6a and a bottom portion 6b, and the bottom portion 6b is provided with bolt holes 7 at four equally spaced locations, and a plurality of strip-shaped notches 6c are provided on each side wall portion. 6a is provided. The bottom 6b of the coupling member 6A is sandwiched between the compression element 2 and the drive element 3 and is fixed via a through bolt 8. Furthermore, the side wall 6a of the cup-shaped coupling member 6A and the sealed container 1 are coupled by welding or the like.

  The operation of this conventional scroll compressor will be briefly described, and the driving force generated by the drive element 3 is transmitted to the compression element 2 to perform the compression operation to compress the working fluid. Further, noise generated when the compression operation is performed by the compression element 2 is transmitted to the sealed container 1 through the coupling member 6A. In this conventional scroll compressor, the transmitted noise is attenuated by the elasticity of the coupling member 6A, and the noise radiated outward from the sealed container 1 is reduced.

  When the compression action is performed, a contact sound between components in the compression element 2 or a fluid sound is generated, which is a source of operation noise. Here, the resonance frequency composed of the mass and elasticity of the compressor assembly 5 including the compression element 2, the drive element 3 and the support element 4 is set lower than the noise frequency generated in the compression element 2, and the compressor assembly 5 is transferred to the sealed container 1. Attenuates transmitted noise.

Japanese Patent Laid-Open No. 11-13654 (FIG. 1)

  The conventional scroll compressor is configured as described above, and the cup-shaped coupling member 6A is formed by a press or the like, and it is difficult to form the side surface of the coupling member 6A in a circular shape. As shown in FIG. 12, a gap d and a torsion f of the side wall 6a are generated between the side wall 6a and the inner surface of the sealed container 1, which makes it difficult to fix the sealed container 1 and the coupling member 6A. there were. For example, when the sealed container 1 and the coupling member 6A are fixed by welding, there is a problem that welded spatter enters the sealed container 1 from the gap d between the two. Further, if the outer periphery of the coupling member 6A is larger than the inner diameter of the sealed container 1, it becomes difficult to insert the coupling member 6A into the sealed container 1 and there is a problem that the assembling work is hindered.

  In order to solve this problem, it is necessary to ensure the processing accuracy of the outer peripheral surface of the side wall 6a of the coupling member 6A and the inner peripheral surface of the sealed container 1, and it is necessary to manage the shape and dimensions by machining or the like. Man-hours and costs were required to secure it.

  The present invention has been developed in view of the above-mentioned problems, and its purpose is to solve the above-mentioned problems, to manufacture a coupling member at low cost, and to easily assemble a compressor. Is to provide.

  Here, the following method corresponding to the said subject is proposed.

A compression element having a fixed scroll and an orbiting scroll; a motor and a drive element having a main shaft that transmits the driving force of the motor; a first frame that supports the main shaft; and the first motor across the motor. A method of assembling a scroll compressor in which a compressor assembly, which is provided integrally with a support element having a second frame that supports the main shaft and is provided on the side facing the frame, is attached to the inside of an airtight container. ,
An L-shaped or substantially L-shaped spring material having a bottom portion in which a hole for a bolt is formed and a side wall portion bent and standing from the bottom portion, and the bottom portion of the first frame of the compressor assembly. And a plurality of spaced apart arrangements around the compressor assembly sandwiched between the drive element and the drive element,
The spring material is positioned with respect to the compressor assembly using an annular positioning member that surrounds the compressor assembly, and is formed in the through hole formed in the support element and the drive element from the support element side. The spring material is temporarily fixed to the compressor assembly by a through bolt inserted into the screw hole of the first frame through the through hole and the bolt hole,
The compressor assembly, to which the spring material is temporarily fixed, is placed in the compression container, the upper portion of the spring material side wall is brought into contact with the inner surface of the compression container, and the through bolt is tightened to compress the spring material. A method of assembling a scroll compressor, wherein the assembly is fixed to a machine assembly, and the upper part of the spring material side wall and the contact part of the inner surface of the compression container are welded to couple the compressor assembly to the compression container.

  The spring material is formed by bending a rectangular spring material, and has a joint surface having substantially the same curvature as the inner periphery of the sealed container at the upper portion of the side wall portion.

  As described above, according to the present invention, since the coupling member is not formed in a cup-shaped integral shape as in the prior art, but formed in a plurality of L-shapes or substantially L-shapes, each coupling member can be positioned and assembled. In addition, when connecting to the sealed container, there is no gap between the inner surface of the sealed container and each coupling member can be easily and reliably fixed to the sealed container.

  Further, according to the present invention, since a plurality of coupling members can be positioned and assembled, there is no gap between the sealed container and the coupling member, and when the sealed container and the coupling member are fixed by welding. The conventional problem that welding spatter penetrates into the sealed container from between the two can be solved. Further, since the coupling member is L-shaped or substantially L-shaped, it is difficult to insert into the sealed container as in the case of the conventional cup-shaped coupling member, which hinders assembly work. It does not occur at all, and the assembly work can proceed smoothly.

  Further, according to the present invention, the plurality of coupling members can be divided and arranged in the circumferential direction, and the outer circumferential surface of each coupling member can be positioned and assembled so as to abut against the inner circumferential surface of the sealed container. There is no need to process the inner peripheral surface of the hermetic container with high accuracy, and a compressor with low noise can be obtained at low cost.

Embodiment 1 FIG.
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a simplified cross-sectional view showing a scroll compressor according to the present invention. In FIG. 1, 1 is a sealed container, 2 is a compression element constituted by a fixed scroll 2a and a swinging scroll 2b, and 3 is an electric motor 3a. And a driving element 4 constituted by parts such as a main shaft 3b for transmitting the driving force of the electric motor 3a, and a side 4 facing the first frame 4a across the first frame 4a supporting the parts such as the main shaft 3b and the electric motor 3a. Is provided with a support element constituted by parts such as a second frame 4b that supports the main shaft 3b, 5 is a compressor assembly constituted by the compression element 2, the drive element 3 and the support element 4, and 6 is a sealed container 1 Is a connecting member for connecting the compressor assembly 5 and the compressor assembly 5 and is fixed to the compressor assembly 5 by bolting or the like.

  FIG. 2 is a perspective view of the coupling member according to the present invention. The coupling member 6 of FIG. 2 is formed by bending a rectangular spring material having an appropriate thickness and length into an L shape or a substantially L shape. The part 6a and the bottom part 6b are integrally formed, the bolt hole 7 is formed in the bottom part 6b, and the side wall part 6a is curved so as to be in contact with the inner surface 1a of the sealed container 1. If the coupling member 6 is too thick, the noise attenuation effect is reduced, and if it is too thin, the support strength is weakened. Therefore, the coupling member 6 is formed of a spring material having an appropriate thickness.

  In the scroll compressor according to the present invention, four coupling members 6 are used as shown in FIG. As shown in FIG. 1, the bottom portion 6 b of each coupling member 6 is sandwiched between the first frame 4 a of the compressor assembly 5 and the drive element 3, and the through bolt 8 passes through the support element 4 from the support element 4 side. The screw 4c of the first frame 4a is screwed and fixed through the hole 4c, the through hole 3c of the drive element 3, and the bolt hole 7 of the coupling member 6.

  When the compressor assembly 5 is fixed to the inner surface 1a of the hermetic container 1, the coupling members 6 are arranged at equal intervals in the circumferential direction of the hermetic container 1, and the compressor assembly is formed with the through bolts 8 as described above. 5, the outer side surface 6 c of the side wall portion 6 a of each coupling member 6 is positioned so as to contact the inner surface 1 a of the sealed container 1, and the coupling member 6 is coupled and fixed to the compressor assembly 5 with a bolt 8. It is what I did.

  Furthermore, the inner surface 1a of the sealed container 1 and each coupling member 6 are coupled by spot welding or the like, so that the compressor assembly 5 is supported inside the sealed container 1 via a plurality of coupling members 6.

  The coupling member 6 adjusts the width and the thickness to set the elastic modulus so that a noise attenuation effect can be obtained.

  Further, in the coupling member 6 of the example shown in FIG. 4, the bolt hole 7 for bolt fastening is molded into an ellipse so that the position adjustment of the coupling member 6 is easy.

  FIG. 5 shows the position adjustment of the coupling member 6 in the radial direction and the position adjustment in the rotation direction. The position adjustment can be easily performed by using a positioning jig.

  Further, as shown in FIG. 6, for example, when assembling the compressor assembly 5, the jig 9 as shown in FIG. 7 is used to position the compressor assembly 5 and the coupling member 6, and the jig 9 is removed after fastening. Thereafter, the sealed container 1 and the coupling member 6 may be fixed by welding or the like.

  FIG. 8 shows another example of the coupling member 6, which is a substantially L-shaped coupling member 6 having a joint surface having substantially the same curvature as the inner surface 1 a side of the sealed container 1 (see FIG. 1). 10, the gap between the inner surface 1a side of the sealed container 1 and the joint surface 10 of the coupling member 6 can be reduced. Thus, if the outer periphery of the coupling member 6 is configured with substantially the same curvature as the inner surface 1a side of the sealed container 1, the gap between the sealed container 1 and the sealed container 1 can be further reduced, and spatter intrusion during welding can be prevented.

  Further, the elastic modulus can be adjusted by adjusting the width and length of the coupling member 6, and the resonance frequency consisting of the mass of the compressor assembly 5 and the elasticity of the elastic member can be adjusted. By arbitrarily adjusting the resonance frequency, it is possible to arbitrarily set the attenuation characteristic of the noise transmitted from the compressor assembly 5 to the sealed container.

  When the scroll compressor according to the present invention is operated, it is transmitted to the compression element 2 by the driving force generated by the driving element 3 to perform the compression operation and compress the working fluid. Noise generated when the compression operation is performed by the compression element 2 is transmitted to the sealed container 1 through each coupling member 6. Here, the transmitted noise is attenuated by the elasticity of each coupling member 6, and the noise emitted to the outside from the sealed container 1 is reduced.

  In the configuration of the scroll compressor according to the present invention, the compressor assembly 5 is positioned and assembled so that the outer surface 6 c of the side wall portion 6 a of the plurality of coupling members 6 contacts the inner surface 1 a of the sealed container 1. Therefore, the scroll compressor can be easily assembled regardless of the accuracy of the coupling member 6.

  Further, in the processing and formation of the coupling member 6, as compared with the processing and formation of the conventional coupling member 6 </ b> A (see FIG. 11), perfect circle grinding is not required, and the manufacturing cost can be reduced. Furthermore, gaps are formed between the coupling members 6 that are spaced apart in the circumferential direction of the sealed container 1, and these gaps penetrate in the vertical direction. The inside is easily cooled.

  Further, as shown in FIG. 9, a bottom bolt 6b of the coupling member 6 is sandwiched between the first frame 4a and the electric motor 3a, and the second frame 4b, the electric motor 3 and the first frame 4a are fastened by a through bolt 8. If the coupling member 6 is also fastened, it can be simply configured without increasing the number of parts.

  In the scroll compressor according to the present invention, the number of coupling members 6 is not limited to four, and may be more or less than four as long as it is plural.

It is a longitudinal cross-sectional view of the scroll compressor by Embodiment 1 of this invention. It is a perspective view of the coupling member concerning this invention. It is a cross-sectional view at the time of providing the coupling member concerning this invention in the airtight container. It is a perspective view of the coupling member of the other example concerning this invention. It is a top view in the case of the positioning adjustment of the coupling member concerning this invention. It is a fragmentary longitudinal cross-sectional view which positions the coupling member concerning this invention using a jig. It is the perspective view which notched some jigs of one example. It is a perspective view of the coupling member of another example concerning this invention. It is a longitudinal cross-sectional view in the case of fastening together the coupling member concerning this invention with a through bolt. It is sectional drawing of the scroll compressor of a prior art example. It is a perspective view of the coupling member of a prior art example. It is a cross-sectional view at the time of providing the coupling member of a prior art example in an airtight container.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Airtight container, 1a inner surface, 2 Compression element, 2a Fixed scroll, 2b Rocking scroll, 3 Drive element, 3a Electric motor, 3b Main shaft, 4 Support element, 4a First frame, 4b Second frame, 5 Compressor assembly , 6 coupling members, 8 through bolts.

Claims (1)

A compression element having a fixed scroll and an orbiting scroll; a motor and a drive element having a main shaft that transmits the driving force of the motor; a first frame that supports the main shaft; and the first motor across the motor. A method of assembling a scroll compressor in which a compressor assembly, which is provided integrally with a support element having a second frame that supports the main shaft and is provided on the side facing the frame, is attached to the inside of an airtight container. ,
An L-shaped or substantially L-shaped spring material having a bottom portion in which a hole for a bolt is formed and a side wall portion bent and standing from the bottom portion, and the bottom portion of the first frame of the compressor assembly. And a plurality of spaced apart around the compressor assembly sandwiched between the drive element and the drive element,
The spring material is positioned with respect to the compressor assembly using an annular positioning member that surrounds the compressor assembly, and is formed in the through hole formed in the support element and the drive element from the support element side. The spring material is temporarily fixed to the compressor assembly by a through bolt inserted into the screw hole of the first frame through the through hole and the bolt hole,
The compressor assembly, to which the spring material is temporarily fixed, is placed in the compression container, the upper portion of the spring material side wall is brought into contact with the inner surface of the compression container, and the through bolt is tightened to compress the spring material. A method of assembling a scroll compressor, comprising: fixing to a compressor assembly; welding the upper portion of the side wall portion of the spring material and an abutting portion of the inner surface of the compression vessel; and coupling the compressor assembly to the compression vessel.

Images