WO1997049919A1

WO1997049919A1 - Displacement type fluid machine

Info

Publication number: WO1997049919A1
Application number: PCT/JP1997/002181
Authority: WO
Inventors: Yuuichi Yanagase; Akihiko Yamamoto; Muneo Mizumoto; Tatsuo Natori; Isamu Tsubono; Koichi Inaba; Nobuo Abe
Original assignee: Hitachi, Ltd.
Priority date: 1996-06-24
Filing date: 1997-06-24
Publication date: 1997-12-31
Also published as: JP3226549B2

Abstract

After a compression portion of a displacement type compressor is assembled, a film forming material is poured into a compression chamber while the compression portion is being operated. As a result, an excessive film forming material at a contact portion is removed and a thick film forming material is formed at a non-contact portion. Consequently, clearance of the compression chamber becomes minimal, and a displacement type fluid machine having high compression performance can be obtained.

Description

Specification

Fluid machinery

Technical field

The present invention relates to a positive displacement type fluid machine, and more particularly to a positive displacement type fluid machine in which performance is improved by minimizing a gap between engagement portions of a portion forming a compression chamber, and a method of manufacturing the same.

Background art

As a conventional positive displacement fluid machine, for example, there is a scroll compressor. The compression chambers of the scroll compressor are formed simultaneously by engaging the spiral wraps formed on the fixed scroll and the orbiting scroll, and multiple compression chambers are formed at the same time. The volume of the chamber becomes smaller as needed, and the fluid in the compression chamber is compressed to a high pressure and discharged from the discharge port. The conventional method of manufacturing fixed scrolls and rotating scrolls involves precision finishing and assembly by machining. However, structural parts have tolerance dimensions even when finished with super precision, and when these are assembled, errors are often accumulated, and it is difficult to make the gap of the compression chamber close to the minimum by machining only. In order to reach the minimum, processing costs that do not match the product cost will be spent. Therefore, in the past, in order to achieve high efficiency of the compressor, for example, Japanese Patent Laid-Open Publication No. Hei 6-323049 (hereinafter referred to as Reference 1) applied ultra-precision polishing to the mirror plate surface of the fixed scroll. After precision polishing of the revolving scroll, a soft surface treatment such as phosphate coating or MoS2 is applied, and these parts are combined to reduce the clearance by bringing both end plate surfaces into contact with each other. Has been described.

Disclosure of the invention

Displacement compressors are made by combining several components with each other. Since the compression chamber is formed, the shape and dimensions of the mating portion are precisely machined. However, each component has its own dimensional tolerance due to machining tolerances, and assembling these components may further increase the dimensional tolerance. It is often treated. This surface treatment also considers reducing the frictional resistance during compressor operation and reducing the wear by changing the combination of the same sliding materials, but also plays a role in adjusting the mutual clearance in the initial stage of assembly. Yes. In other words, the soft surface treatment layer is worn away at the parts that are in strong contact with each other after assembling, and the clearance is adjusted so as not to make strong contact with each other. However, it is possible to adjust the clearance at the contacting part, but at the non-contact part, the operation is performed with the large clearance, and there is no effect on the improvement of the compression efficiency.

A first object of the present invention is to provide a fluid compressor in which the clearance between members forming a compression chamber is minimized in the entire compression stroke in order to improve compression efficiency.

A second object of the present invention is to provide a method of manufacturing a fluid compressor in which the clearance between members forming a compression chamber is minimized in the entire compression stroke in order to improve compression efficiency.

As described above, it is not practical to precisely process the compression chamber forming portion in order to improve the compression efficiency of the positive displacement fluid machine.

Also, as shown in Reference 1, even after applying a soft surface treatment to the compression chamber forming part, these parts are combined and the members are brought into contact to narrow the clearance, but the non-contact part does not clear the clearance. And the compression efficiency cannot be improved.

The inventors have conducted intensive studies on a method of increasing the compression efficiency of a positive displacement fluid machine without precisely processing the compression chamber forming portion, and as a result, have reached the present invention. The displacement type fluid machine according to the present invention includes: a space formed by a plurality of members; a volume variable unit that changes a volume of the space by changing a relative position of the plurality of members; In a positive displacement type fluid machine including a fluid introduction unit for introducing a fluid and a fluid discharge unit for releasing a fluid from the space, a film is formed on a surface of a plurality of members forming the space, The space is sealed by sliding the films formed on the surfaces of the plurality of members in a range in which the plurality of members can be moved by the variable capacity means.

Further, the film formed on the surface of a plurality of members to form the space containing at least one particle selected from M o S ₂ particles, S b ₂ 0 ₃ particles, the group consisting of C particles and graphs eye DOO It is desirable to do.

A method of manufacturing a positive displacement fluid machine according to the present invention includes the following steps.

(1) A step of assembling the space.

(2) A step of driving the volume variable means.

(3) A film-forming material is injected into the space from the fluid introduction means to fill the space.

A step of attaching the film forming material to a surface to be configured.

(4) a step of collecting from the fluid discharging means a film-forming material that has been injected into the space and that has not adhered to a surface constituting the space.

(5) A step of curing the film-forming material attached to the surface constituting the space.

Incidentally, M o S ₂ particles were desirable to inject those containing at least one particle selected from S b ₂ 0 ₃ particles, C particles and the group consisting of the graph eye Bok as a film forming material. In addition, it is effective to heat the film forming material in order to cure the film forming material. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a longitudinal sectional view of a hermetic scroll compressor according to Embodiment 1 of the present invention. FIG. 2 is an enlarged sectional view of a main part of FIG. 1 and a diagram showing a film forming method. FIG. 3 is a longitudinal sectional view of the hermetic scroll compressor according to Embodiment 1 of the present invention.

FIG. 4 is a longitudinal sectional view of the hermetic scroll compressor according to Embodiment 1 of the present invention.

FIG. 5 is a longitudinal sectional view of the oil free scroll fluid machine according to Embodiment 1 of the present invention.

FIG. 6 is a longitudinal sectional view of the oil free scroll fluid machine according to Embodiment 1 of the present invention.

FIG. 7 is a longitudinal sectional view of the oil-readable scroll compressor according to Embodiment 1 of the present invention.

FIG. 8 is a model diagram of a cross-sectional state of a film of a film-forming material according to Example 1 of the present invention.

FIG. 9 is a longitudinal sectional view of a vertical film forming apparatus according to Embodiment 2 of the present invention. FIG. 10 is a longitudinal sectional view of a vertical film forming apparatus of a scroll fluid machine according to Embodiment 2 of the present invention.

FIG. 11 is a longitudinal sectional view of a vertical film forming apparatus of a scroll fluid machine according to Embodiment 2 of the present invention.

FIG. 12 is an enlarged cross-sectional view of a spiral wrap portion of a fixed and revolving scroll according to Embodiment 2 of the present invention and a diagram showing a film forming method in a film forming apparatus. FIG. 13 is a longitudinal sectional view of a horizontal film forming apparatus according to Embodiment 2 of the present invention. FIG. 14 is a system diagram of a film forming apparatus for mass production according to Embodiment 2 of the present invention.

FIG. 15 is a longitudinal sectional view of a hermetic compressor in which a swirling type fluid machine according to Embodiment 3 of the present invention is applied to a compressor.

FIG. 16 is an enlarged sectional view of a main part of FIG.

FIG. 17 is a plan view of a compression element of a swirling type fluid machine according to Embodiment 3 of the present invention. FIG.

FIG. 18 is an explanatory view of the operation principle of the swirling fluid machine according to Embodiment 3 of the present invention.

FIG. 19 is an enlarged sectional view of a compression element and a film forming method of a swirling type fluid machine according to Embodiment 3 of the present invention.

FIG. 20 is an explanatory diagram of a film forming method of the screw compressor according to Embodiment 4 of the present invention.

FIG. 21 is a cross-sectional view showing a toothed portion of a screw-type compressor according to Embodiment 4 of the present invention.

FIG. 22 is a cross-sectional view showing a rotor tooth profile of a screw-type compressor according to Embodiment 4 of the present invention.

FIG. 23 is a longitudinal sectional view of an oil-free screw-type compressor according to Embodiment 4 of the present invention. The best way to carry out the invention

The best mode for carrying out the present invention will be described in detail with reference to examples.

(Example 1)

FIG. 1 is a longitudinal sectional view showing a hermetic scroll compressor to which the present invention is applied. As shown in the figure, the fixed scroll 4 and the rotating scroll 5 that mesh with each other are connected between the frame 8 and the rotating scroll 5 via an Oldham ring 10 that prevents rotation. 8 and fixed scroll 4 are bolted together. The driving rotary shaft 9 is engaged with the electric motor 3 including the rotor 3 a and the stay 3 b, and is further supported and rotated by the raw bearing 11 provided on the inner surface side of the frame 8. . One end of the driving rotary shaft 9 is an eccentric shaft and engages with a rotary scroll bearing 5a to enable the rotary motion. Lubrication of the main bearing 11 and the slewing bearing 5a is performed by using oil 12 accumulated at the bottom of the container 1 with a differential pressure oil through an oil supply hole 9a provided in the rotary shaft 9. In order to increase the compressor efficiency of this hermetic scroll compressor, it is necessary to minimize all the clearances of the fixed scroll and the rotating scroll.

In this embodiment, in order to minimize all the clearance between the fixed scroll and the rotating scroll, a liquid film-forming material is injected into the compression chamber in a state where the fixed and rotating scrolls are assembled, and the compression space is reduced. Produces a solid film that forms At this time, the rotating scroll is moved at the same time as the film-forming material is injected to remove excess film-forming material adhered to the surfaces of the spiral wraps, thereby minimizing clearance. It is important that the turning scroll starts its movement before the material is solidified and discharges excess film material. If a slurry-like film-forming material is used, the rotating scroll is moved after the slurry is filled. The film-forming material introduced into each compression space by the movement of the rotating scroll adheres to each surface and is kneaded.

Since the film-forming material rubbed against the surface has an appropriate tackiness, the two are integrated with each other with a strong adhesion. Further, by continuing the swirling motion, the heat generated by the compression of the gas in the compression space causes the film-forming material to be dried and cured when the film contains resin.

The adhesive strength of the film differs depending on the combination of the material of the surface of the compression space and the component of the film forming material.

For example, the following materials are suitable as the components of the composite material of the iron-based material whose surface of the compression space is.

(1) M o S ₂ particles as the Bigume down bets on by Nda poly amino Doi mi de _{(PAI), S b 2 0} 3 that the particles and C particles are dispersed.

(2) by Nda organic in full We one nor resin M o S ₂ particles as the Pigume down bets, S b ₂ 0 ₃ particles, it is dispersed a plurality of kinds of C particles and graphs eye and. C 3) an inorganic sodium silicate also properly is re cone also properly is a Bigume down bets on silicon gate bi Nda M o S ₂ particles, S b ₂ 0 ₃ particles, C particle terminal and graph eye DOO What dispersed several kinds of.

If the surface of the compression space is subjected to a surface treatment such as a phosphate film treatment to form fine irregularities on the surface of the compression space, the film can be uniformly formed.

In addition, it is desirable to introduce external heating, for example, hot air, to assist in drying and hardening and curing of the film forming material.

Now, a specific example of the film forming process will be described below with reference to FIG.

FIG. 2 shows an enlarged longitudinal sectional view of a compressed portion formed by a fixed scroll and a rotating scroll, and a film forming method of the present invention. As shown in this figure, a film formation liquid suction pipe 18 is attached to a discharge part 4a disposed on the outer periphery of the fixed scroll 4 from a discharge port 6 provided in the container 1, and the film formation liquid 13 is pierced, for example. Extruded with a ton-type pump 14, the excess film-forming liquid is supplied to the pump 15 from the suction port 7 while adhering to the spiral wrap of the fixed scroll 4 and the orbiting scroll 5, the tooth bottom and the end plate surface To discharge. The film solution 13 discharged outside is collected through a pipe and used again as a film forming solution if necessary. The film-forming liquid supply pipe 18 and the discharge portion 4 a of the fixed scroll are sealed with a ring 16 so as not to leak into the container 1. The film forming liquid 13 injected into the compression space 2 formed by the fixed scroll 4 and the orbiting scroll 5 is adhered to the spiral wrap of the fixed scroll 4 and the orbiting scroll 5 and the end plate surface. In order to dry the film forming liquid 13 after the film forming liquid 13 is applied, hot air is supplied from the discharge port 6 by a hot air supply source 17 arranged outside, and heated and maintained at a predetermined temperature. The film formation is completed by solidifying the film formation liquid. In this film-forming liquid solidification process, the film at the contact area is worn out or eliminated, and the coating material adheres further to the area where the clarity is large, and the clarity narrows as needed, resulting in extremely small clarity. The shape To achieve. As a heating source at this time, self-heating due to the compression movement of the orbiting scroll 5 or hot air from a hot air supply source 17 is introduced, and when a predetermined temperature, for example, 150, is reached, the film forming solution is heated. Solidify. As a result, the compression part is fixed, the spiral wrap of the revolving scroll, the clearance between the tooth bottom and the mirror surface are minimized, and the efficiency of the scroll fluid machine is improved by an inexpensive film forming method. Can be achieved.

An example of a hermetic scroll compressor to which the present invention is applied will be described with reference to FIGS. 3 to 6, which has a structure in which a compression section and an electric motor can be separated.

FIG. 3 is a longitudinal sectional view showing another hermetic scroll compressor to which the present invention is applied. As shown in the figure, the fixed scroll 4 and the revolving scroll 5 meshing with each other are connected between the frame 8 and the revolving scroll 5 via an Oldham ring 10 that prevents rotation. 8 and fixed scroll 4 are fastened by bolts. The driving rotary shaft 9 is supported and rotated by a main bearing 11 provided on the inner surface side of the frame 8, and one end of the driving rotary shaft 9 becomes an eccentric shaft and engages with the rotary scroll bearing 5a. It is possible to turn. For lubrication of the main bearing 11 and the slewing bearing 5a, oil 12 is supplied with differential pressure oil through the oil supply hole 9a provided in the rotating shaft. The drive rotary shaft 9 and the electric motor 19 are connected by a magnetic force ring 20 formed by a rotor 2 Oa and a magnetite 2 Ob, and the compression unit and the electric motor 19 are sealed. I have. In the scroll compressor having this structure, the compression section and the electric motor 19 can be separated by the magnetic coupling 20, so that the same coating treatment as in FIG. 2 can be performed with only the compression section.

FIG. 4 is a longitudinal sectional view showing another hermetic scroll compressor to which the present invention is applied. As shown in the figure, the fixed scroll 4 and the revolving scroll 5 meshing with each other are connected between the frame 8 and the revolving scroll 5 via an Oldham ring 10 for preventing rotation. Frame 8 and fixed scroll 4 are fastened by bolts. Also, the drive rotary shaft 9 is The rotary shaft 9 is supported and rotated by a raw bearing 11 provided on the inner surface side of the frame 8, and one end of a drive rotary shaft 9 is engaged with a rotary scroll bearing 5 a as an eccentric shaft so as to be rotatable. For lubrication of the main bearing 11 and the slewing bearing 5a, oil 12 is supplied with differential pressure oil through an oil supply hole 9a provided in the rotating shaft 9. A sealing mechanism 21 is provided to completely seal the drive rotation shaft 9 and the electric motor 19, and the compression section and the electric motor 19 are completely sealed. Since the compression part of the scroll compressor of this structure and the electric motor 19 can be separated by the seal mechanism 21, the same coating treatment as in Fig. 2 can be performed with only the compression part.

FIG. 5 is a longitudinal sectional view showing another oil free scroll fluid machine to which the present invention is applied. As shown in the figure, the fixed scroll 4 and the revolving scroll 5 that mesh with each other are connected between the frame 8 and the revolving scroll 5 via an Oldham ring 10 that prevents rotation. Frame 8 and fixed scroll 4 are bolted together. The driving rotary shaft 9 is supported and rotated by a main bearing 11 provided on the inner surface side of the frame 8, and one end of the driving rotary shaft 9 becomes an eccentric shaft and engages with the bearing 5 a of the orbiting scroll 5. It is possible to make a turning motion. The lubrication of the main bearing 11 and the slewing bearing 5a uses grease or solid lubricant. The drive rotary shaft 9 and the electric motor 19 are connected by an electromagnetic coupling 20 formed of a rotor 20a and a magnet 20b, and a seal between the compression section and the electric motor 19 is provided. are doing. Since the compression section of the scroll compressor of this structure and the electric motor 19 can be separated by the electromagnetic coupling 20, the same coating treatment as in FIG. 2 can be performed with only the compression section.

FIG. 6 is a longitudinal sectional view showing another oil free scroll fluid machine to which the present invention is applied. As shown in the figure, the fixed scroll 4 and the revolving scroll 5 that mesh with each other are connected between the frame 8 and the revolving scroll 5 via an Oldham ring 10 that prevents rotation. Frame 8 and fixed scroll 4 are fastened by bolts. Also, drive rotation The shaft 9 is supported and rotated by a main bearing 11 provided on the inner surface side of the frame 8, and one end of the driving rotary shaft 9 is formed as an eccentric shaft and engages with the bearing 5 a of the rotary scroll 5 to be able to rotate. And The lubrication of the main bearing 11 and the slewing bearing 5a uses grease or solid lubricant. A sealing mechanism 21 is provided to hermetically seal the driving rotary shaft 9 and the electric motor 19, and the compression section and the electric motor 19 are completely sealed. Since the compression part of the scroll compressor of this structure and the electric motor 19 can be separated by the seal mechanism 21, the same coating treatment as in Fig. 2 can be performed with only the compression part.

FIG. 7 is a longitudinal sectional view of another oil feeder pull scroll fluid machine to which the present invention is applied. La orbiting scroll 7 0 was formed in a spiral shape on both sides of the鍊板7 0 b-up 7 0 a,, 7 0 a ₂ is configured, the tip seal member 7 to the tip of Raniso is 0 c Are arranged. There are two fixed scrolls, and the first fixed scroll 71 and the second fixed scroll 72 are arranged in parallel, and the fixed scrolls 71, 72 are mutually connected at the outer periphery. It is fixed by fastening means. The compression chamber 73 is formed together with the revolving scroll in a state where the wraps 7 la and 72 a are spirally formed. Tip seals 71 C and 72 C are provided at the tips of these wraps. The drive shaft 75 having an eccentric portion is rotatably supported by bearing means 77 a and bearing means 77 b provided on the first fixed scroll 71. At the eccentric portion of the drive shaft 75, a part of the outer peripheral portion of the end plate of the revolving scroll is rotatably connected by bearing means 73a. On the other hand, an auxiliary crank shaft 76 having an eccentric portion is disposed at a position of approximately 180 °, and a part of the outer peripheral portion of the rotating scroll plate is also supported by this. They are connected via means 74b. The auxiliary crankshaft 76 is formed by bearing means 77c provided on the head plate 71b of the first fixed scroll and bearing means 77d provided on the head plate 72b of the second fixed scroll. It is rotatably supported. Balance axis 7 9a, 7 on drive shaft 75 9 b is provided so that the unbalance amount of the interlocking movement of the orbiting scroll 70 is offset. Further, the auxiliary crank 76 is connected to the drive shaft 75 by means of a rotation adjusting means 78 so that the auxiliary crank 76 rotates in synchronization with the rotation of the drive shaft 75. The drive shaft 75 is rotated by a power source 83 arranged outside the fixed scroll. A suction port 82 is provided on the outer periphery of the first fixed scroll 71 so that gas fills the outer periphery of the scroll. The compression operation chamber 73 divided into two parts by the revolving scroll head plate 70b is configured so that the volume decreases from the outer peripheral part toward the center part, and the flow path 70 e united. Further, a discharge hole 80 is provided in the plate 71b of the first fixed scroll 71 so as to face this flow path. The orbiting scroll head 70 b is provided with a communication hole 70 d so that the pressures in the upper and lower compression working chambers 73 are equalized as much as possible. The surfaces of the first fixed scroll 71 and the second fixed scroll 72 are provided with heat dissipating fins 81a and 81b, respectively.

When the drive shaft 75 rotates, the orbiting scroll 70 having laps on both sides of the head plate makes a revolving motion while preventing rotation by the auxiliary crank shaft 76. When supplying the film forming liquid to the scroll fluid machine with this structure, the film forming material is introduced from the discharge holes 80 while moving the swirling scroll 70, and the spiral wrap, the tooth bottom and the sickle It is discharged from the inlet 82 while adhering to the plate surface. The film-forming material that has entered the compression chamber adheres to the surface of the fixed and orbiting scroll, and heats and maintains the film at a predetermined temperature to form a film. Until this process is completed, the film at the contact area is worn away or eliminated, and the coating material adheres to the areas where the clarity is large, and the clarity narrows as needed, resulting in extremely small clarity. To form The heating source at this time may be self-heating due to the compressive motion of the orbiting scroll 70 or, though not shown, hot air from the outside may be introduced from the inlet to reach a predetermined temperature to form a film forming solution. Solidified Let

Fig. 8 shows a model of the substrate and the cross-sectional state of the film thus formed. The figure shows a state where a film is directly formed on a base iron-based material. At this time, if a film is formed after applying a surface treatment to form irregularities in advance on the surface of the iron-based material, for example, a phosphate film treatment, the film can be formed uniformly and uniformly, and the adhesion to the iron-based material can be improved. May be improved. Those shown in the figure is obtained by dispersing the M o S ₂ particles, S b ₂ 0 ₃ particles and C particles as the Bigume down bets on by Nda poly A Mi Doi mi de (PAI). Further, M o S ₂ particles as the Pigume down bets on Fuwenoru resin by Nda organic system and is not shown in FIG. A deposition agent, S b ₂ 0 ₃ particles, of C particles and graphs eye DOO In some cases, a plurality of types are dispersed. In addition to this, Narumakuzai and to the inorganic silicate soda also properly is re-cone also rather death Rige door of by Nda to Bigume down door and to M o S ₂ particles, S b ₂ 0 ₃ A dispersion of multiple types of particles, C particles and graphite is suitable.

(Example 2)

As an example of the hermetic scroll compressor, a compressor with a structure that allows the compression section and the electric motor to be separated (Figs. 3 to 6) has been described. A film forming apparatus suitable for the above film forming operation will be described with reference to FIGS.

FIG. 9 is a longitudinal sectional view of a vertical film forming apparatus of a scroll fluid machine. The fixed scroll 4 and the revolving scroll 5 are connected between the frame 8 and the revolving scroll 5 via an Oldham ring 10 that prevents rotation, and assemble a compression section formed by combining the above members. The electric motor 30 mounted on the film-forming apparatus and the drive cultivation shaft 9 are connected to each other with the cutting 31 in a state where the film-forming apparatus is installed in an upright position. Since the electric motor 30 has a function of controlling the rotation speed, it is possible to change the rotation speed depending on the film formation state. When forming a film with this film forming apparatus, The film forming liquid is supplied from the discharge port 4a while moving the rotating scroll 5 to be formed, and the excess is discharged from the suction port 4b while adhering to the spiral wrap portion, the tooth bottom and the end plate surface. Is done. The film-forming material entering the compression chamber adheres to the surfaces of the fixed scroll 4 and the orbiting scroll 5, and can be solidified by heating and maintaining the film at a predetermined temperature, for example, 150.

Fig. 10 shows a coiled spring spring 32 installed in the compression part of the closed scroll fluid machine shown in Figs. 3 to 6, and seals the end plates of the fixed scroll 4 and the rotating scroll 5. This is to enhance the effect and prevent leakage of the film forming solution. According to this structure, it is possible to reliably prevent the film-forming material from leaking out of the compression chamber, so that problems such as the film-forming material adhering to the bearing can be prevented.

In this structure, the rotating scroll 5 is pressed against the fixed scroll 4 by the springs 32. Therefore, if the scroll fluid machine is assembled with this structure, the amount of the pressing load of the coil springs 32 will be reduced. Power loss occurs. For this purpose, the frame 8 is divided into two parts, a housing 33 provided with a main bearing 11 and a seal mechanism 21 is provided, and the seal 21 with the frame 8 is sealed with a 0 ring 34. After film formation, the coil spring 32 can be removed.

Fig. 11 shows an example in which an elastic body is installed in the compression part of the closed scroll fluid machine shown in Figs. FIG. According to this structure, it is possible to reliably prevent the film-forming material from leaking out of the compression chamber, thereby preventing problems such as the film-forming material sticking to the bearing.

In this structure, the revolving scroll 5 is pressed against the fixed scroll 4 by the elastic body 35. Therefore, if the scroll fluid machine is assembled with this structure, the power for the pressing load of the elastic body 35 is applied. Loss occurs. For this reason, the frame 8 is divided into two parts, the main bearing 11 and the sealing mechanism 21 A housing 33 equipped with L4 is provided, and the seal 21 with the frame 8 is sealed with a 0 ring 34.The elastic body 35 can be removed after film formation. I have.

FIG. 12 shows a specific film forming method when the vertical film forming apparatus S of this embodiment is used. As shown in this figure, a film-forming liquid suction pipe 18 is attached to the discharge part 4a on the outer periphery of the fixed scroll 4, and the film-forming liquid 13 is pushed out by, for example, a piston type pump 14, and the fixed scroll 4 and the swivel are rotated. Excess film formation liquid is suctioned and discharged from the suction port 4b of the fixed scroll 4 by the pump 15 while being attached to the spiral wrap portion, the tooth bottom and the end surface of the scroll 5. The film material discharged outside is collected through a pipe and used as a film material again if necessary. The film forming liquid supply pipe 18 and the discharge portion 4a of the fixed scroll are sealed with a 0 ring 16 so as not to leak outside. The film forming liquid 13 entering the compression chamber formed by the fixed scroll 4 and the swirling scroll 5 adheres to the surface of the fixed scroll 4 and the swirling scroll 5 and is supplied from outside by a hot air supply source 17. Hot air is supplied from the discharge port 4a and heated and maintained at a predetermined temperature, thereby completing the film formation. In this process, the film at the contact portion is worn out or eliminated, and the material for deposition further adheres to a portion where the clarity is large, and the clarity narrows as needed to form a very small clarity. As the heating source at this time, self-heating by the compression movement of the revolving scroll 5 or hot air from the hot air supply source is introduced from the discharge part 4a by the hot air supply source 18, and a constant temperature of, for example, 15 When the temperature reaches 0, the film forming liquid solidifies. As a result, the compactness of the compression section, the spiral wrap of the orbiting scroll, the clearance between the tooth bottom and the end plate surface are minimized, and the scroll fluid machine is manufactured using an inexpensive film-forming method. It is possible to achieve higher efficiency.

Although not shown, the film forming apparatus has a mechanism capable of forming a film while swinging or tilting the compression unit up to about ± 120 °.

With this function, the lap height is high and the film-forming liquid moves in the opposite direction of gravity. ―

15 can reliably form a film on the target surface even in a compressed portion that is difficult to adhere to by swinging or tilting the compressed portion.

If this film forming apparatus is used, films can be formed in compression chambers of various types of scrolls, so that the scroll compressor can be easily made into a series.

FIG. 13 is a longitudinal sectional view of a horizontal film forming apparatus for a scroll fluid machine. In a state where the compression section of the scroll fluid machine and the compression section capable of separating the electric motor are assembled, the compression section is arranged in the film forming apparatus, and the film forming material is introduced from the discharge section 4a while the orbiting scroll 5 is moved. The excess is discharged out of the suction part 4b by a pump while being attached to the spiral wrap, the tooth bottom and the end plate surface. The suction part 4b is attached below the discharge part 4a as shown. The film-forming material that has entered the compression chamber adheres to the surface of the fixed and revolving scroll, and can be solidified by heating to a predetermined temperature, for example, 150.

In the process of solidification, the film at the contact area is worn away or eliminated, and the film material adheres to the area where the clarity is large, and the clarity narrows as needed to form a very small clarity. . As a heating source at this time, a self-heating due to the compression movement of the orbiting scroll 5 or a film forming apparatus for solidifying a film forming liquid by introducing hot air from a discharge unit.

By this function, the compression part can be swung or tilted even in a region where there is a possibility that the film forming liquid may not reach the spiral wrap above the discharge port of the compression chamber. As a result, a film can be reliably formed.

By using this film forming apparatus, films can be formed in the compression chambers of various types of scrolls, so that the scroll compressor can be easily made into a series.

In addition, the above problem can be solved by applying vibration. Fig. 14 shows a system diagram of a film forming system for mass production of scroll fluid machinery. You. With the compression part of the scroll fluid machine assembled, it is placed in the film forming apparatus, and while moving the orbiting scroll 5, the film forming liquid 13 is discharged from the film forming liquid supply tank 36 from the discharge part 4a while moving the rotary scroll 5. The excess is introduced by a suction type pump 14 and attached to the spiral wrap, the tooth bottom and the end plate surface, and the excess is discharged out of the suction part 4 b by the suction pump 15. The film-forming material entering the compression chamber adheres to the surface of the fixed and swirling scroll, and can be solidified by heating and maintaining the film at a predetermined temperature, for example, 150. The heating source at this time is a self-heating due to the compression movement of the orbiting scroll, or a mass-production film forming apparatus for solidifying the film forming liquid by introducing hot air from the discharge port.

(Example 3)

The structure of the rotary positive displacement fluid machine according to the present invention will be described with reference to FIGS. 15 to 17. FIG. FIG. 15 is a longitudinal sectional view of a hermetic compressor when the positive displacement fluid machine according to the present invention is used as a compressor. FIG. 16 is an enlarged sectional view of a main part of FIG. FIG. 7 is a plan view of the compression element. The cross-sectional views of the compression element shown in FIGS. 15 and 16 correspond to the A_ A cross section in FIG.

In FIG. 15, reference numeral 41 denotes a positive displacement element according to the present invention, 42 denotes a frost moving element for driving the same, and 43 denotes a closed container containing the positive displacement element 41 and the electric element 42. is there. The details of the positive displacement compression element 41 will be described with reference to FIG. 17 which shows a three-section lap in which three sets of the same contour are combined. The inner peripheral shape of the cylinder 44 is formed such that a hollow portion having a shape like a ginkgo leaf appears at every 120 ° (center ο ′). Each end of the ginkgo leaf-shaped hollow portion has a plurality of (in this case, three) substantially arc-shaped vanes 44 b protruding inward. The swivel piston 45 is disposed inside the cylinder 44, and has an inner peripheral wall 44 a (a portion having a larger curvature than the vane 44 b) and a vane 44. It is configured to engage with b. In addition, When the center o 'of the dam 44 and the center o of the turning screw 45 match, the contours of the two are similar, and a gap having a constant width is formed between the two. Next, the operating principle of the positive displacement compression element 41 will be described with reference to FIGS. 17 and 18. FIG. The symbol 0 is the center of the turning screw 45 which is a displacer, and the symbol o 'is the center of the cylinder 44 (or the drive shaft 46). The symbols a, b, c, d, e, and f represent the contact points between the inner peripheral wall 44a and the vane 44b of the cylinder 44 and the rotating piston 45. Here, looking at the peripheral contour shape of the cylinder 44, the same combination of curves is smoothly connected by surrounding three places. Focusing on one of these points, こと The curve that forms the peripheral wall 44a and the vane 44b can be regarded as one thick vortex curve (the tip of the vane 44b is considered to be the beginning of the vortex). The wall curve (ga) has a winding angle of approximately 360 ° (meaning that it is 360 ° by design, but not exactly due to manufacturing errors. The same applies hereinafter). The outer wall curve (g'-b) is a vortex curve with a winding angle of almost 180 °. The inner contour at one location is formed from an inner wall curve, an outer wall curve, and a connection curve (g-g ') connecting the outer wall curve and the inner wall curve. A spiral body composed of these three curves is arranged at a substantially equal pitch (120 °) on the circumference, and the outer and inner wall curves of adjacent spiral bodies are smooth curves such as arcs (for example, b — b ' ), An inner peripheral contour shape of the cylinder 44 is formed. The outer peripheral shape of the revolving screw 45 is also configured according to the same principle as that of the cylinder 44.

The spiral body composed of three curves is assumed to be arranged at a substantially equal pitch (120 °) on the circumference. This is for the purpose of evenly distributing the load associated with the compression operation described later and for ease of manufacturing. In particular, if these things do not matter, an unjust pitch may be used.

Now, the compression operation by the cylinder 44 and the swivel piston 45 configured as described above will be described with reference to FIG. 4 7a is the suction port, 48 a is a discharge port, which is provided at each of three locations. By rotating the drive shaft 6, the turning screw 45 revolves around the center o 'of the fixed cylinder 4 4 with a turning radius ε (= ο, ο') without rotating around the center o '. A plurality of working chambers 55 (moving around the center ο of the swivel piston 45) (enclosed and sealed by the cylinder inner peripheral contour (inner wall) and the piston outer peripheral contour (side wall)) This is the space where the suction is completed and the compression (discharge) process is completed, and this space is lost at the end of compression, but the suction ends at that moment, so this space is counted as one. However, when used as a pump, a space that communicates with the outside via a discharge port is formed (in the present embodiment, there are always three working chambers). One hatched working chamber surrounded by contacts _a and b (force divided into two at the end of suction, ', and as soon as the compression stroke starts, these two working chambers are connected and become one ). Fig. 18 (1) shows the state in which the suction of working gas from the suction port 7a into this working chamber has been completed. Fig. 18 (2) shows the state where the 90 ° drive shaft 46 has rotated from this state, and Fig. 18 (3) shows the state where the drive shaft has rotated 180 ° from the beginning. Fig. 18 (4) shows a state in which the rotation has progressed by 270 ° from the beginning.

Fig. 18 (4) When the force rotates 90 °, it returns to the initial state shown in Fig. 18 (1). Thus, as the rotation proceeds, the working chamber 55 decreases its volume, and the discharge port 48a is closed by the discharge valve 49 (shown in Fig. 19), so that the working fluid compresses. It will be done. When the pressure in the working chamber 55 becomes higher than the external discharge pressure, the discharge valve 49 automatically opens due to the pressure difference, and the compressed working gas is discharged through the discharge port 48a. Is done. The shaft rotation angle from the end of suction (compression start) to the end of discharge is 360 °, and the next suction stroke is prepared during each compression and discharge stroke. Starts compression. For example, for contacts a and d Focusing on the space constituted by the above, suction has already started at the stage of Fig. 18 (1), and its volume increases as the rotation progresses, and when the state of Fig. 18 (4) is reached, This space is divided. The fluid corresponding to this split amount is supplemented from the space formed by the contacts b and e. The above-mentioned compression operation will be described in detail below. Focusing on the working chamber formed by the contacts a and d in the state shown in Fig. 18 (1), the space formed by the adjacent contacts a and d has started to be sucked. Of the fluid should be compressed by the space formed by the contacts a and b after the shaft rotation angle of 360 °, but this space will not expand after the expansion as shown in Fig. 18 (3). However, not all the fluid in the space formed by the contacts a and d is compressed in the space formed by the contacts a and b, since the separation occurs in Fig. 18 (4). . In FIG. 18 (4), the space formed by the contacts b and e in the suction process is the same as the volume of fluid that has been divided and not taken into the space formed by the contacts a and d. As shown in Fig. 18 (1), it is divided and filled with the fluid flowing into the space formed by the contact point b near the discharge port and the contact point b. This is because, as described above, they are arranged at a uniform pitch, not at an uneven pitch. In other words, since the shape of the revolving piston and the cylinder are formed by repeating the same contour shape, almost the same amount of fluid is compressed even if fluid is obtained from different spaces in any of the working chambers. You can do it. Although it is possible to perform processing so that the volumes formed in the respective spaces are equal even if the pitch is not uniform, the productivity is poor. It is a characteristic of this compressor that the space adjacent to the working chamber in the suction process is divided and the compression operation is performed.

The swirl screw 45 is disposed in the cylinder 44 forming the compression element 41 of the piston type positive displacement fluid machine described above, and the inner peripheral wall 44 a of the cylinder 44 is provided. And the vane 4 4b. The The film forming solution 13 is introduced from the film forming solution supply tank 36 by the piston type pump 14 from the suction port 47 a while rotating the swirling screw 45 to rotate the swirling screw 45. The excess is discharged from the discharge pipe 54 through the discharge port 48 a and the discharge valve 49 by the suction pump 15 while being attached to the outer periphery of 45 and the inner peripheral wall 44 a of the cylinder. The film-forming material that has entered the compression chamber adheres to the outer periphery of the swirling screw 45 and the surface of the inner peripheral wall 44a, and is heated and maintained at a predetermined temperature, for example, 150 °. Can be solidified. As a heating source at this time, self-heating due to the compression movement of the swirl-stone or hot air is introduced from the discharge port to solidify the film-forming liquid. Until this film formation is completed, the film at the contact area is worn away or eliminated, and the material for deposition is further attached to areas with high clarity. Form a sense. As a heating source at this time, self-heating due to the compression movement of the swirling piston 45 or hot air from the hot air supply source 17 is introduced, and when the temperature reaches a predetermined temperature, for example, 150 ° C., the film forming solution is heated. Solidify. As a result, the clearance between the outer peripheral portion of the rotating screw 45 of the compression section and the peripheral wall 44a of the cylinder is minimized, and the efficiency of the positive displacement fluid machine can be improved by an inexpensive film forming method. It is.

(Example 4)

An embodiment of a screw compressor according to the present invention will be described with reference to FIGS. 20 to 23. FIG.

FIG. 23 is a sectional view showing a screw compressor to which the present invention is applied. As shown in the figure, the male rotor 93 b and the female rotor 93 a that engage with each other are rotatably supported at both ends by bearings 99, and the bearings 9 1 The oil that has lubricated 9 is prevented from entering the compression chamber C formed by the rotor casing 100 and the rotor 93. Further, in the compression chamber C, for example, oil is not injected to cool the pair of rotors 93 and the like. In addition, the male mouth 93b has a drive pinion 97 fixed at one end thereof, and a pair of timing gears 9 at the other end and the other end of the female rotor 93b. 8 is fixed. Therefore, when the drive pinion 97 is driven, the pair of timing gears 98 causes the pair of rotors 93 to rotate synchronously, compressing the air sucked from the suction port A indicated by the one-point line, and compressing the air into a chain line. Discharge from discharge port B indicated by. At this time, since cooling oil is not supplied between the pair of rotors 93, the surfaces of the pair of rotors 93 are exposed to high-temperature air, and the temperature rises and thermal expansion occurs. The tooth shape is deformed. Accordingly, in the present invention, the tooth profile and the gap of the pair of rotors 93 are formed as follows. FIG. 22 is a cross-section perpendicular to the axis of the tooth profile and casing of FIG. FIG. 21 is an enlarged cross-sectional view showing one embodiment of the tooth profile portion of the pair of blades 93 of FIG. 23. FIG. 20 is a schematic view showing an embodiment of the present invention. In FIG. 20, reference numeral 93 denotes a set of rotors, and a casing 100 surrounds the set. The coating agent is introduced from the air inlet 91 and adheres to at least one set of the rotor surface and the inner surface of the casing 100, and the remainder is discharged out of the system through the air outlet 92. The coating agent discharged to the outside can return to the vicinity of the suction port as needed through a pipe (not shown), and can be used again as a coating agent. The female rotor 93a also forms a base with the same material as the male rotor 93b, and a coating agent externally introduced is formed on its surface as a coating. At least one set of rotors determines a tooth profile that takes into account the thermal expansion of the tooth profile at the preset maximum temperature and the gap between the pair of rotors 93 in FIG. 23, and then sets the pair of rotors 93 to room temperature. It is possible to say that if the returned and contracted tooth profile is obtained and ground by a grinding machine or the like so that the tooth profile is obtained, the thickness of the coating agent can be easily made uniform, so that the effect of the invention can be further improved. Not a requirement. In this case, the tooth profile of the other female rotor 93 b in particular is As will be described later, when the pair of rotors 62 are assembled to a compressor, and the load is driven by synchronous rotation by the timing gear 98, it is generated by the one male rotor 93b. Any shape is acceptable and does not require accuracy as in the past. Further, when the pair of rotors 93 are assembled to the compressor, the gap may be formed to be a value slightly larger than a predetermined gap. Next, as shown in FIG. 23, the pair of rotors 93 are assembled to a compressor, and while the backlash in the rotational direction is restrained by the timing gear 98, the rotational speeds V m ( Male port-Rotating at evening speed), Vi (rotating speed of female rotor), releasing the discharge port to the atmosphere at first, performing no-load operation at low speed, and then applying the coating agent from the suction port. When the discharge pressure is increased by switching to the load operation with the introduction, the other rotor 93 a thermally expands as the temperature rises, and the surfaces of the pair of rotors 93 generate relative slip. . This point will be described with reference to Fig. 22. The male rotor 93b and the female rotor 93a contact each other regardless of the advancing surface or the reversing surface of the coating 94b of the female rotor 93b. Are cut down by each other by each other. Also, at this time, when the coating 93c adhered to the inner surface of the mouth-taking 100 comes into contact with the above-mentioned mouths 93a and 93b, the contact portion becomes the above-mentioned raw material coating 94a, Cut by 9 4 b. The deformation due to the thermal expansion of the pair of rotors 93 due to the rise in the temperature and pressure of the discharge air and the process of creation by the male rotors 93 b are performed at a preset maximum temperature of the pair of rotors 93. Rotation is continued until a value with a certain margin is added, and finally, the entire rotor surface 93 and the entire axial section are rotated until the above-mentioned individual rotors 93 have the optimum tooth profile to maintain the minimum clearance. In the process, the coating is created. In this way, when the generating process is completed, the operation of the compressor is stopped, and the pair of rotors 93 is returned to room temperature.

Therefore, in the present embodiment, a pair of ports formed in タ 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 The lubricant is introduced and the counterpart is created by the rotor 93 and the casing 100, and the minimum gap is formed.It is assumed that the load has been continuously rotated by the actual machine as in the past. The tooth profile and the casing of the rotor 93 are extremely easily and accurately compared to the case where the tooth profile and the gap between the two mouths are accurately calculated and the tooth profile is formed alone based on the calculation result. 100 shape

• Dimensions can be machined to the minimum clearance when driven. Also, it is possible to create an optimum gap that matches the precision of the components of each compressor.

In each of the embodiments described above, the male rotor and the female rotor are described as a pair. However, the present invention relates to a screw-type compressor in which the male rotor and the female mouth are configured as a pair or more. Can be similarly applied.

Claims

The scope of the claims

1. A space formed by a plurality of members, a volume variable unit that changes a volume of the space by changing a relative position of the plurality of members, and a fluid introduction unit that introduces a fluid into the space. A fluid discharge device that discharges fluid from the space,

A film is formed on the surface of the plurality of members forming the space, and the space is a film formed on the surface of the plurality of members within a range in which the plurality of members can move by the capacitance changing unit. A positive displacement fluid machine characterized by being sealed by sliding contact with each other.

2. A space formed by a plurality of members, a volume variable unit that changes a volume of the space by changing a relative position of the plurality of members, and a fluid introduction unit that introduces a fluid into the space. A fluid discharge device that discharges fluid from the space,

The plurality of members are formed of an iron-based material,

Film containing at least one particle is made form selected from M o S ₂ particles, S b ₂ 0 ₃ particles, the group consisting of C particles resonator and a graph Ai DOO on the surface of the plurality of members forming the space And

The volume-type fluid is characterized in that the space is sealed by the sliding contact of the films formed on the surfaces of the plurality of members within a range in which the plurality of members can move by the variable capacity means. machine.

3. A space formed by a plurality of members, a volume changing unit that changes a volume of the space by changing a relative position of the plurality of members, a fluid introduction unit that introduces a fluid into the space, What is claimed is: 1. A method for manufacturing a positive displacement fluid machine, comprising: a fluid discharging means for releasing a fluid from a space, comprising the following steps.

(1) A step of assembling the space. (2) A step of driving the volume variable means.

(3) a step of injecting a film-forming material into the space from the fluid introduction means and attaching the film-forming material to a surface constituting the space;

4. a space formed by a plurality of members made of an iron-based material; a volume changing unit that changes a volume of the space by changing a relative position of the plurality of members; and introducing a fluid into the space. A method for manufacturing a positive displacement fluid machine, comprising: a fluid introducing means for discharging a fluid from the space; and a fluid discharging means for discharging a fluid from the space, comprising the following steps.

(1) A step of assembling the space.

(2) A step of driving the volume variable means.

(3) said fluid introducing means Mo S ₂ particles in the space from, Sb ₂ 0 ₃ particles, by injecting a deposition material containing at least one particle selected from the group consisting of C particles resonator and a graph eye Bok said Attaching the film-forming material to a surface constituting a space.

(4) recovering from the fluid discharge means the film-forming material that has been injected into the space and that has not adhered to the surface constituting the space.