JP2006112379A - Fluid machine manufacturing method and fluid machine - Google Patents

Abstract

In an electrical surface treatment of a scroll member, a masking member for preventing a treatment liquid from entering a bearing portion is reliably and efficiently mounted to improve reliability and productivity.
When anodizing a movable scroll 3, a seal portion 41a that protects the processing liquid from entering the bearing bush portion 8a, a connection portion 43a that is connected to a processing power supply 36, and a fixed portion that is fixed to the bearing portion 3a. A masking member 35 having a portion 41a (also used as a seal member) is mounted in advance so as to cover the bearing portion 3a, and the movable scroll 3 is processed, so that it can be securely sealed and easily and efficiently connected and fixed. The manufacturing method of a fluid machine with high productivity and high productivity can be realized.
[Selection] Figure 1

Description

  The present invention relates to a method of manufacturing a fluid machine for transporting fluids, and in particular, is used for refrigeration equipment, air conditioning equipment, etc., HFC-based alternative refrigerant gas that is high-pressure refrigerant gas, carbon dioxide gas that is a natural refrigerant, etc. The present invention relates to a method of manufacturing a scroll-type fluid machine that compresses or expands, and a fluid machine manufactured thereby.

  As the compressors for refrigerating and air-conditioning, there are reciprocating, rolling piston, and scroll types of compression mechanisms, and any of these methods is used in the field of refrigerating and air-conditioning for home use and business use. Both types of compressors are configured by accommodating a compression mechanism, a driving shaft, an electric motor, and the like in a sealed container.

  Here, a conventional technique will be described by taking a scroll compressor for an air conditioner when the HCFC refrigerant R22 is used as a working gas as an example. A longitudinal sectional view of a conventional scroll compressor is shown in FIG.

  Inside the hermetic container 1 are a compression mechanism portion 2 composed of a fixed scroll 2a and a movable scroll 3, a shaft 5 for rotating the movable scroll 3 with respect to the fixed scroll 2a via an Oldham coupling 4, and a fixed scroll. A bearing member 6 is provided that fixes the shaft 2a and rotatably supports the shaft 5.

  A rotor 7 a of an electric motor 7 is attached to the shaft 5, and is disposed below the bearing member 6 together with a stator 7 b that is fixed to the body shell 20 by shrink fitting or the like.

  An oil sump 10 for storing the lubricating oil 9 is provided at the lower bottom of the sealed container 1, and the oil 9 in the oil sump 10 is removed from the lower end of the through hole 13 of the shaft 5 by the oil pump 17 as the shaft 5 rotates. Suction and supply to each sliding surface such as the journal bearing 6a, the eccentric bearing 3a, and the fixed scroll 2a and the movable scroll 3f. Journal bearing 6a, eccentric bearing 3a, and bush bearings 8a and 8b having excellent durability and sliding characteristics are press-fitted. These bearing bushes 8a and 8b have a sliding layer made of carbon or synthetic resin formed on the inner week surface of a cylindrical back metal, and are generally used.

  First, the refrigerant gas compression cycle will be described. The low-pressure refrigerant gas that has circulated through the heat exchanger (not shown) of the air conditioner is sucked into the compression mechanism 2 through the suction pipe 11.

  The sucked refrigerant gas enters a crescent-shaped compression space (not shown) formed between the fixed scroll 2 a and the movable scroll 3, and the crescent-shaped compression space is centered from the outside by the turning motion of the movable scroll 3. The refrigerant gas is compressed to become a high-pressure gas and is discharged from the discharge hole 12 by being gradually reduced toward.

  The high-pressure gas discharged from the discharge hole 12 is once discharged into the discharge space 1a above the fixed scroll 2a in the hermetic container 1, flows into the space 1b above the movable element 7a through the gas passage 14, and enters the rotor 7a. From the provided gas passage 18a to the bottom space 1c of the sealed container 1, further flows upward through the passage 18b provided on the outer periphery of the stator 7b, and through the gas passage 15 provided separately from the passage 14, from the fixed scroll 2a. It flows into the upper space 1c and is discharged from the discharge pipe 16 to an external air conditioning system such as a heat exchanger (not shown). The high-pressure gas circulates in a heat exchanger or the like of the air conditioner in the air-conditioning system to become a low-pressure gas and constitutes a known compression cycle that returns to the compressor from the suction pipe 11 again.

  Next, the circulation cycle of the lubricating oil that supplies the lubricating oil 9 to each sliding portion will be described. The lubricating oil 9 sucked up by the oil pump 17 from the oil sump 10 rises in the through hole 13 of the shaft 5, lubricates and cools the eccentric bearing 3a, the journal bearing 6a, and the sliding portions, and the journal bearing 6a. From the lower oil discharge port to the space 1b above the mover 7a and return to the oil sump 10 at the bottom through the passage 18a in the mover 7a. Part of the lubricating oil 9 that has passed through the eccentric bearing 3 a adjusts the pressure in the back pressure space 22 in which the Oldham coupling 4 is installed and the pressure in the back pressure space 22 from the boss space 21 below the movable scroll 3. The refrigerant is led to the suction side compression chamber 24 through the suction back pressure adjusting valve 23 and is returned to the oil sump 10 at the bottom through the gas passages 14 and 18a from the discharge hole 12 together with the refrigerant gas compressed by the turning motion of the movable scroll 3. A lubricating oil circulation cycle is formed. These sliding oil circulation cycles lubricate and cool the Oldham coupling 4, the movable scroll 3, the fixed scroll 2a, and other sliding portions.

  However, in order to cope with global environmental problems, HFC refrigerants that are more efficient and have a lower global warming potential than conventional CFCs such as R12 and HCFC refrigerants such as R22, which are more suitable for suppressing global warming ( For example, use of a device that uses, as a refrigerant, a natural refrigerant (eg, carbon dioxide (hereinafter referred to as CO2)) having a smaller global warming potential, such as an HFC refrigerant having R410A or R32 as a main component. Is underway.

  Many of these refrigerants require a higher operating pressure than the conventional refrigerant R22 or the like in order to increase the system efficiency of the equipment due to the characteristics of the refrigerant, and the sliding portion is slid while receiving a large force according to the pressure. Move. In addition, the HFC-based refrigerant has no chlorine that had a lubricating action in the HCFC system, and the natural refrigerant CO2 has a strong cleaning action, both of which are inferior in terms of lubrication than the conventional HCFC-based refrigerant.

  For example, in the case of the compressor having the conventional configuration shown in FIG. 5, the movable scroll 3 rotates while being pressed against the fixed scroll 2a by the pressure in the boss portion space 21 and the back pressure space 22, as shown in FIG. In addition, the compression chamber thrust surface 32b of the fixed scroll 2a and the wrap end surface 33a (upper surface side in the drawing) of the movable scroll 3, similarly the wrap end surface 32a (lower surface side in the drawing) of the fixed scroll 2a and the compression chamber of the movable scroll 3 are used. The thrust surfaces 33b slide on each other while receiving the load.

  Further, the key portion 4a of the Oldham joint 4 and the key groove portion 3b of the movable scroll 3 are also slid against each other under the load as described above.

  In these sliding parts, under severe operating conditions and high differential pressure operating conditions caused by the use of alternative refrigerants, an excessive load is generated during operation, and the lubricating oil film on the sliding part becomes very thin and partially contacted. Yes (close to boundary lubrication). When this mixed lubrication state (similar to boundary lubrication) continues, wear occurs on the surface of the sliding part. Therefore, a structure having a highly wear-resistant material and surface treatment is devised on the surface of the sliding part. ,It has been implemented. For example, when a material mainly composed of aluminum is used for the base material of the movable scroll 3, a method of forming an anodized layer on the surface of the movable scroll 3 is used (see, for example, Patent Document 1). A method using sulfuric acid, oxalic acid, or the like is generally used to form this anodized layer (see, for example, Non-Patent Document 1).

  FIG. 7 shows a schematic process of the anodized film treatment (see, for example, Non-Patent Document 1). For example, in the first masking and rack mounting process, when an anodized film is formed on the movable scroll, the processing liquid enters or remains in a part where the film is not desired to be formed (here, a bearing bush) or a hole that does not penetrate. If necessary, a masking member is attached. In addition, it is mounted on a frame (rack) for transporting to each process, and the movable scroll is electrically connected to a processing power source.

  Then, after passing through a pretreatment step for surface degreasing and ground treatment, an anodizing treatment step, a sealing treatment step for improving film stability, and a drying step, it is removed from the rack and the masking member is removed. Is done. A cleaning process is provided between the processes in order to completely remove the treatment liquid, and usually, water washing and hot water washing are performed several times using a large number of tanks.

FIG. 8 shows mounting of a masking member described in Patent Document 1. In the case of the conventional scroll compressor, the movable scroll 3 is provided with a bearing bush 8b (see FIG. 6), and the back metal (for example, SPCC material) of the bearing bush 8b is used in an anodizing process. When immersed in various alkaline processing solutions, corrosion occurs and becomes defective. Therefore, as shown in the example of FIG. 8, a method is used in which the masking member 35 is attached to protect the bearing bush 8b from the intrusion of the processing liquid. In this conventional example, the masking member 35 is made of an elastic material such as resin or rubber, and the seal of the processing liquid and the masking member 35 are fixed by being in close contact with the outer peripheral surface 33c of the eccentric bearing portion 3a. Further, although details are not described in Patent Document 1, since it is necessary to connect to a processing power source 36 that energizes the movable scroll 35 at the time of anodizing, in the example of FIG. The electrode 37 is mounted.
JP 2000-104680 A "Aluminum Handbook" published by Japan Association of Light Metals, 1994, P152-164

  However, in the conventional configuration shown in FIG. 7, when the anodizing process is performed, the movable scroll 3 is transported to each processing step and the operation of connecting the movable scroll 3 to the processing power supply in addition to the conventional masking member 35 mounting operation. Work (racking) that is fixedly mounted on a frame (rack) or the like to be performed is required. In the case of patent document 1, since these were performed separately, it had the subject that work efficiency was hard to raise.

Further, when the connecting portion between the movable scroll 3 and the electrode 37 of the processing power source is immersed in the processing liquid, a connection failure is likely to occur due to the consumption of the electrode 37 of the connecting portion, and the vicinity of the connecting portion 33d on the movable scroll 3 side. There has been a problem in the quality of the anodized film, for example, the film thickness and film quality of the anodized film formed by the above method become unstable. These are particularly problematic in improving productivity when the electrode 37 of the connection portion is repeatedly used.
The present invention solves the above-described conventional problems, and an object thereof is to provide a manufacturing method for realizing high productivity of a fluid machine having a scroll having high wear resistance and lubrication performance.

  In order to achieve the above object, according to a first aspect of the present invention (corresponding to claim 1), when the movable scroll or the other scroll which is a member to be treated is subjected to electroplating treatment or anodizing treatment, A masking member having a sealing means for protecting the processing liquid from entering, a connecting means for connecting to a processing power supply, and a fixing means for fixing to the bearing portion is mounted in advance so as to cover the bearing portion, and the member to be processed is processed. Is.

  Accordingly, the masking member can be easily and securely attached to the member to be processed, fixed and electrically connected.

  According to the method of manufacturing a fluid machine of the present invention, since it is possible to reliably and efficiently mask the surface, the productivity of a fluid machine having a scroll having excellent wear resistance and sliding characteristics can be improved. High-performance fluid machinery can be realized at low cost.

  1st invention has a bearing part in which one end of the rotating shaft of an electrically-driven element is inserted, The fluid machine which conveys the working fluid provided with the movable scroll driven by the said rotating shaft and turning with respect to the other scroll When the movable scroll or the other scroll, which is the member to be treated, is electroplated or anodized, sealing means for protecting the treatment liquid from entering the bearing portion, and connecting means for connecting to the processing power supply Then, a masking member having a fixing means for fixing to the bearing portion is mounted in advance so as to cover the bearing portion, and the member to be processed is processed, so that the masking member is easily and securely attached to the member to be processed. At the same time, it can be electrically connected.

  The second aspect of the invention is particularly the fluid machine manufacturing method of the first aspect of the invention, wherein the connecting member between the member to be processed and the masking member has a screw-like or uneven fitting part, and the fitting part is connected to the member to be treated. By being electrically connected and mechanically fixed, a masking member having a simple structure can be easily and securely attached to the member to be processed and fixed and electrically connected together.

  Embodiments of the present invention will be described below with reference to the drawings. In the configuration of the scroll compressor used in one embodiment of the present invention, the same reference numerals are used for the same functional parts as those in the prior art example described in FIG. Omit.

  Further, the scroll compressor according to the embodiment of the present invention will be described using a case where carbon dioxide is used as a refrigerant (hereinafter referred to as CO2) as an example. However, the present invention is not limited to this, and a conventionally used refrigerant, HFC The present invention can be similarly applied to the case where the refrigerants such as the system refrigerants R410A, R32, or hydrocarbon (HC)) or the lower refrigerant such as the conventional HCFC22 are used, and the same effect can be obtained. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
Embodiment 1 of the present invention will be described with reference to FIG. 1 by taking as an example a case where a movable scroll mainly composed of aluminum is subjected to anodization.

  FIG. 1 is a cross-sectional view of a state in which a masking member is mounted on a cylindrical eccentric bearing 3 a of a movable scroll 3 in the first embodiment of the present invention.

  In FIG. 1, a masking member 40 includes a cylindrical sealing member 41 (sealing means and fixing means) made of an elastic material such as rubber or resin, and titanium or aluminum fitted in close contact with the inside of the sealing member 41. And a coil spring-like connecting member 43 (connecting means) that is installed on the conductive holder member 42 and is in contact with and electrically connected to the eccentric bearing 3a at the connecting portion 43a.

  In this configuration, the seal portion 41a of the seal member 41 is brought into close contact with the outer peripheral surface of the eccentric bearing 3a to seal the processing liquid intrusion into the bearing bush 8a, so that the masking member 40 is not displaced or deviated by the adhesion force. It is fixed.

  The conductive holder member 42 is electrically connected to a processing power source for anodizing treatment via a conveyance frame (not shown), and when the masking member 40 is attached, the coil spring-like connecting member 43 is the end of the eccentric bearing. The conductive holder member 42 and the movable scroll 3 are electrically connected via the connection portion 43a. In addition, the sealing member 41 and the conductive holder member 42 are in close contact with each other for sealing, and the intrusion of the processing liquid from between them is prevented.

  According to the above configuration, since the masking member 40 is integrally provided with the connecting portion 43a and the sealing portion 41a that serves as both the sealing portion and the fixing portion, the wearing of the masking member 40 serves as the sealing, fixing, and electrical connection. It will be easy. Therefore, the mounting time in the masking / rack mounting process of FIG. 7 can be shortened, and the productivity of the movable scroll 3 can be improved.

  In addition, since the connecting portion 43a with the movable scroll 3 is not immersed in the processing liquid, it is possible to reliably make a stable electrical connection over a long period of time, and there is no defect in the coating film of the connecting portion that has conventionally occurred on the movable scroll side, Quality and yield can be improved and productivity of the movable scroll 3 can be improved.

  In particular, the material of the movable scroll 3 is made of a material mainly composed of aluminum and containing silicon particles in an amount of about 1% to 30% (for example, an average particle diameter of 3 to 5 μm) from the viewpoint of mechanical strength and sliding characteristics. In this case, the present configuration in which the connecting portion is not immersed is effective in improving the quality. When using such a material, the silicon particles are difficult to conduct electricity, so if the connection part is immersed in the processing liquid, the electrical connection in the vicinity tends to become unstable. However, in this configuration, the connection part is not immersed in the processing liquid. This is because stable electrical connection is possible.

  Although it seems to be effective in the case of a material containing 30% or more of silicon, the production cost of the material is high, the mechanical strength is low, the formation speed of the anodized layer is low, and the productivity is low. Not realistic.

  It should be noted that the silicon average particle diameter is not limited to 3 to 5 μm, and it goes without saying that the present invention can be applied even when the particle diameter is larger or smaller.

  In the present embodiment, a coil spring is used for the connection member 43, but the present invention is not limited to this, and the same effect can be obtained with an ita spring, conductive rubber, or the like.

(Embodiment 2)
Next, Embodiment 2 of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view of a state in which the masking member is mounted on the cylindrical eccentric bearing 3 a of the movable scroll 3.

  The difference from the first embodiment is that the connecting means also serves as the fixing means, and is constituted by a screw-like fitting portion.

  In FIG. 2, a cylindrical cap-shaped masking member 50 is composed of a conductive boulder member 52, an O-ring 51 (sealing means) and a screw portion 53 (connecting means and fixing means) provided on the inner peripheral surface thereof. A male screw portion 54 provided on the outer peripheral portion of the eccentric bearing 3a of the movable scroll 3 as a processing member and a female screw portion 53 of the masking member 50 are fitted and fitted.

  The conductive boulder member 52 is made of a conductive material such as titanium or aluminum and is electrically connected to the processing power source 36. The O-ring 51 is installed on the inner peripheral surface of the conductive boulder member 52 to prevent the processing liquid from entering, and forms the seal portion 51a with the outer peripheral surface of the eccentric bearing 3a. Further, a female screw part 53 formed on the inner side sealed by the O-ring 51 is screwed into a male screw part 54 on the movable scroll 3 side and fitted into the inner peripheral surface of the conductive boulder 52 to form a fixed part 53a. At the same time, an electrical connection portion is also formed, and the masking member is mechanically fixed and electrically connected to the movable scroll 3.

  According to the above configuration, since the masking member 50 is integrally provided with the O-ring 51 serving as a seal portion and the fixing portion 53a serving as both the connection portion and the fixing portion, the attachment of the masking member 50 is a seal of the processing liquid. Mounting is simple because mechanical fixing and electrical connection can be performed at the same time. Therefore, the mounting time in the masking / rack mounting process of FIG. 7 can be shortened, and the productivity of the movable scroll 3 can be improved.

  Further, according to this configuration, since the fixing is performed by the female screw portion 53, the fixing can be performed more firmly than when the elastic body having the configuration of the first embodiment is fixed, and the masking member 50 is not detached. Further, since the O-ring that is simple in configuration and inexpensive and easy to replace is used, maintenance is easy, and thus productivity can be further improved.

  In addition, the fixed portion 53a, which also serves as a connection portion, is protected by the seal portion 51a and is not immersed in the processing liquid, so that it can be reliably and stably electrically connected for a long period of time. Defects in the film are eliminated, quality and yield are improved, and processing productivity can be improved.

(Embodiment 3)
Next, Embodiment 3 of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view of a state in which the masking member is mounted on the cylindrical eccentric bearing 3 a of the movable scroll 3.

  The difference from Embodiments 1 and 2 is that a magnetic attractive force is used for the fixing means.

  In FIG. 3, a cylindrical cap-shaped masking member 60 is composed of a conductive boulder member 62, an O-ring 61 (sealing means) and a magnet 63 (connecting means and fixing means) provided on the inner peripheral surface thereof, and is processed. The outer peripheral portion of the eccentric bearing 3a of the movable scroll 3 which is a member is inserted and attached to the masking member 50. A movable scroll 3 as a member to be processed is mounted with a bearing bush 8b press-fitted inside an eccentric bearing 3a.

  The conductive boulder member 62 is made of a conductive material such as titanium or aluminum and is electrically connected to the processing power source 36. The O-ring 61 is installed on the inner peripheral surface of the conductive boulder member 62 to prevent the processing liquid from entering, and forms the seal portion 61a with the outer peripheral surface of the eccentric bearing 3a.

  A magnet 63 is installed on the inner peripheral surface of the conductive boulder 62 and sealed inside by an O-ring 51. Masking is performed by a magnetic attractive force generated between the bearing bush 8b and a back metal (a magnetic material such as an SPCC material). The member 60 is attracted and fixed by the fixing portion 63a. At that time, since the masking member 60 and the eccentric bearing 3a are in contact with each other, the fixed portion 63a also serves as an electrical connection portion.

  According to the above configuration, the masking member 60 is integrally provided with the O-ring 61 serving as a seal portion and the fixing portion 63a serving as the connection portion and the fixing portion. Mounting is simple because mechanical fixing and electrical connection can be performed at the same time. Therefore, the mounting time in the masking / rack mounting process of FIG. 7 can be shortened, and the productivity of the movable scroll 3 can be improved.

  Further, according to this configuration, since the fixing is performed by the magnetic attraction force of the magnet portion 63, it can be easily and firmly fixed without a fitting portion such as a screw portion that was necessary in the configuration of the second embodiment. The masking member 60 does not come off during the processing step, and the maintenance is easy because the O-ring that has a simple structure and the seal part is inexpensive and can be easily replaced is used. Therefore, productivity can be improved.

  In addition, the fixed portion 63a, which also serves as a connection portion, is protected by the seal portion 61a and is not immersed in the processing liquid. Therefore, the fixed portion 63a can be securely and stably electrically connected for a long period of time. Defects in the film are eliminated, quality and yield are improved, and processing productivity can be improved.

(Embodiment 4)
In the above configuration example, the eccentric bearing 3a has a cylindrical shape and the masking member 60 has a cylindrical cap shape. However, the configuration is not limited thereto. For example, as shown in FIG. 4, the case where the eccentric bearing 3a has a hollow shape is also applicable.

  In FIG. 4, a disk-shaped masking member 70 includes an O-ring 71 (sealing means) and a magnet 73 (connecting means and fixing means) provided on a plane facing the conductive boulder member 72 and the movable scroll 3 as a member to be processed. The masking member 50 is mounted on the flat surface portion around the outside of the eccentric bearing 3a so as to cover the eccentric bearing 3a. A movable scroll 3 as a member to be processed is mounted with a bearing bush 8b press-fitted inside an eccentric bearing 3a.

  The conductive boulder member 72 is made of a conductive material such as titanium or aluminum and is electrically connected to the processing power source 36. The O-ring 71 is installed inside the conductive boulder member 72 to prevent the processing liquid from entering, and forms a flat portion around the outer side of the eccentric bearing 3a and a seal portion 71a.

  The masking member 70 is attracted and fixed to the conductive boulder 72 by the fixing portion 73a by a magnetic attraction force generated between the magnet 73 and the back metal (magnetic material such as SPCC material) of the installation bearing bush 8b. At that time, since the masking member 70 and the eccentric bearing 3a are in contact with each other, the fixed portion 73a also serves as an electrical connection portion. If the masking member 70 is displaced, a projection 74 may be provided on the masking member 70 and inserted on the bearing bush 8a side.

  According to the configuration of FIG. 4, the masking member 70 is integrally provided with a fixing portion 73 a that doubles as a sealing portion, a connection portion, and a fixing portion of the O-ring 71. Since mechanical fixing and electrical connection can be performed at the same time, mounting becomes easy. Therefore, the mounting time in the masking / rack mounting process of FIG. 7 can be shortened, and the productivity of the movable scroll 3 can be improved.

  Further, since the fixing is performed by the magnetic attraction force of the magnet portion 73, it can be easily and firmly fixed without a fitting portion such as a screw portion which is necessary in the configuration of the second embodiment, and the configuration is also simple. Since the O-ring that is cheap and easy to replace is used for the seal part, it is easy to maintain, so the productivity can be improved.

  In addition, the fixed portion 73a, which also serves as the connection portion, is protected by the seal portion 71a and is not immersed in the processing liquid, so that it can be reliably and stably electrically connected for a long period of time. Defects in the film are eliminated, quality and yield are improved, and processing productivity can be improved.

  In the first to fourth embodiments, the case where the scroll type compression mechanism is provided has been described as an example. However, the present invention can be applied to other rotary type, reciprocating type compressors, expanders, and pumps. Needless to say, the same effect can be realized. In particular, when a reduction in size and weight is required, an aluminum alloy is also used for the mechanism portion in many cases, and anodization treatment is often performed. In particular, the present invention can exhibit more effects. In other words, by applying the present invention, it is possible to easily and reliably implement the masking rack mounting process, which has been a bottleneck in improving productivity by taking time and effort, thus realizing a highly reliable and productive fluid machine. it can.

  Since the present invention is particularly effective when a CO2 refrigerant is used, the first to third embodiments have been described by way of example. However, the present invention is not limited to the CO2 refrigerant, and the operating pressure is equivalent to that of the CO2 refrigerant. Needless to say, the same effects as described above can be obtained even when the refrigerant is used below or above.

Sectional drawing of the masking member in Embodiment 1 of this invention Sectional drawing of the masking member in Embodiment 2 of this invention Sectional drawing of the masking member in Embodiment 3 of this invention Sectional drawing of the masking member in Embodiment 4 of this invention Vertical section of a conventional scroll compressor Enlarged view of the main parts of a conventional scroll compressor Process diagram of conventional anodizing treatment The figure which shows mounting of the conventional masking member

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Moveable scroll 3a Eccentric bearing 8a Bearing bush 30 Power supply 40 Masking member 41 Seal member 41a Seal part 42 Metal holder 43 Connection member 43a Connection part

Claims (6)

A fluid machine that has a bearing portion into which one end of a rotating shaft of an electric element is inserted, and that transports a working fluid that is driven by the rotating shaft and includes a movable scroll that pivots with respect to the other scroll. When the movable scroll or the other scroll which is a member is subjected to electroplating treatment or anodizing treatment, sealing means for protecting the treatment liquid from entering the bearing section, connection means for connecting to a processing power source, and the bearing section A manufacturing method of a fluid machine, wherein a masking member having a fixing means for fixing is mounted in advance so as to cover the bearing portion, and the member to be processed is processed. The fluid according to claim 1, wherein the connecting member between the member to be processed and the masking member has a threaded or uneven fitting part, and the fitting part is electrically connected and mechanically fixed to the member to be processed. Machine manufacturing method. The fluid machine manufacturing method according to claim 1 or 2, wherein the means for fixing the bearing portion and the masking member includes a magnetic portion, and the masking member is mechanically fixed to the bearing portion by the magnetic force of the magnetic portion. The method of manufacturing a fluid machine according to any one of claims 1 to 3, wherein the connecting portion is installed at a site protected from the processing liquid by a sealing means. 5. A fluid machine manufactured by the manufacturing method according to claim 1, wherein the member to be processed includes aluminum as a main component and silicon in an amount of about 1% to 30%. 5. A fluid machine manufactured by the manufacturing method according to claim 1, wherein the working fluid is mainly composed of an HFC refrigerant or carbon dioxide.

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