JPS59188094A - Rotary compressor with rotating sleeve - Google Patents

Abstract

PURPOSE:To make improvements in the durability of a rotating sleeve, by having both of a center housing constituting a casing and the rotating sleeve to be rotatably housed inside the housing made of aluminum, while conducting alumite treatment for both inner and outer circumferential surfaces of the rotating sleeve. CONSTITUTION:A rotary compressor houses a rotating sleeve 5 inside a housing 1 consisting of a cylindrical center housing 2 and each of side housing 3 set up at both sides of the center housing 2, and eccentrically sets up a rotor 7 in which plural vanes 17 are slidably set up in a radial direction inside the said sleeve 5. The center housing 2 and the rotating sleeve 5 both are made up of aluminum, and alumite treatment is conducted for both inner and outer circumferential surfaces 5b and 5a of the rotating sleeve 5. In addition, each vane 17 is made of carbon. With this constitution, not only the promotion of lightweightiness is attainable but also heat dissipation properties can be improved, thus durability of the rotating sleeve 5 can be raised up.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is used as a mechanical supercharger for intake supercharging in an engine, for example, and has a rotating sleeve that rotates synchronously with a rotor. Related to rotary compressors.

(Prior Art) Rotary compressors having such a rotating sleeve have been known for some time (for example, Fig. 15.1 of "Volume Expansion Compressor" (published by Sangyo Tosho Co., Ltd., April 5, 1978)). a)). That is, a cast iron rotating sleeve is rotatably fitted into a casing formed by a cylindrical cast iron center housing and side housings arranged on both sides of the casing, and a rotor driven from the outside is fitted into the casing. It is arranged eccentrically with respect to the rotation center of the
A plurality of plate-shaped vanes are fitted into the rotor so as to be retractable, and as the rotor rotates, the rotary sleeve is rotated along with the rotor via the vanes. Oil is supplied between the rotating sleeve and the center housing, and the oil bearing layer prevents the two from coming into contact. This type of rotary compressor is advantageous in terms of durability because the rotary sleeve rotates with the vane, which prevents heat generation and wear caused by sliding of the vane tip, and is advantageous in terms of durability. Recently, it has been attracting attention as an optimal supercharger for engines that operate over a wide rotation range.

However, in the conventional system described above, the center housing and the rotating sleeve are made of cast iron and have poor heat dissipation, so the surface temperature of both, especially the surface temperature of the rotating sleeve, becomes high during operation, and the inner periphery of the rotating sleeve increases. The problem is that the volumetric efficiency of the air sucked into the compression chamber defined by the rotor surface and the outer peripheral surface of the rotor decreases, the frictional resistance of the outer peripheral surface of the rotating sleeve increases, and the overall weight of the rotary compression unit increases. There is.

Therefore, it is conceivable to solve the above problem by, for example, forming the rotating sleeve from aluminum, which has good heat dissipation properties and is lightweight. However, in this case, even if only the rotating sleeve is made of aluminum, the heat transfer from the rotating sleeve is inhibited by the high temperature inner peripheral surface of the cast iron center housing, and as a result, the rotating sleeve reaches its high temperature strength limit. The problem of heat deformation is a real problem.

Therefore, it is conceivable to go further and form both the center housing and the rotating sleeve with aluminum to lower the temperature of the center housing and further reduce the weight. Sliding contact between aluminum, which has inferior properties, causes seizure in the high-speed rotation range of several thousand revolutions per minute, making it impractical for use as an engine supercharger.

(Objective of the Invention) The object of the present invention is, in order to put into practical use a rotary compressor having a rotary sleeve which is advantageous in terms of durability as described above, by specifying the materials and surface treatments of the components of the compressor. In addition to reducing the weight of the rotary compressor, we have also increased the volumetric efficiency of intake air to improve compression efficiency, and improved the heat resistance and abrasion resistance of the center housing and vanes of the rotary sleeve to improve durability. It's about trying.

In order to achieve the above object, the solution means of the present invention is a rotary compressor having a rotary sleeve as described above, in which the center housing is made of aluminum, the rotary sleeve is made of aluminum, and the inner circumferential surface thereof is The outer circumferential surface is anodized in five colors, and the vane is carbon '14.
This is a special change.

As a result, in the present invention, the temperature of the compression chamber can be lowered due to the excellent heat dissipation properties of the rotating sleeve and the center housing made of aluminum, and the heat load on the rotating sleeve can be reduced. The treatment improves the high temperature strength and wear resistance of the rotating sleeve, and reduces the frictional resistance between the rotating sleeve and the carbon vane.

<Effects of the Invention> Therefore, according to the present invention, it is possible not only to reduce the weight of a rotary compressor using a rotary sleeve, but also to maintain the temperature of the compression chamber low and reduce the volume of intake air. It is possible to increase efficiency, that is, improve compression efficiency, reduce the thermal load on the rotating sleeve and improve its durability, and also improve durability by increasing the high temperature strength and wear resistance of the rotating sleeve. This makes it possible to further improve durability and reduce weight, and to reduce the frictional resistance between the rotating sleeve and the vane, thereby reducing drive torque loss. By putting a rotary compressor into practical use, it is possible to provide and realize the optimum engine supercharging system.

(Example) Hereinafter, an example as a specific example of the technical means of the present invention will be described based on the drawings.

FIGS. 1 and 2 show an embodiment of the present invention, in which 1 is a casing, and the casing 1 includes a cylindrical center housing 2 and side housings 3, 3 disposed on both left and right sides of the cylindrical center housing 2. Multiple (four in the figure) fastening bolts 4
, 4.... A cylindrical rotating sleeve 5 whose outer diameter is slightly smaller than the inner diameter of the center housing 2 is fitted into the casing 1 so as to be rotatable and concentric with the axis of the center housing 2. The gap between the outer circumferential surface 5a of the center housing 2 and the inner circumferential surface 2a of the center housing 2 is, for example, 30 to 50μ).
An air bearing chamber 6 is formed by this. Roughly speaking, inside the rotary sleeve 5, a cylindrical rotor 7 having shaft portions γa and 7a at both ends is eccentric with respect to the rotation center of the rotary sleeve 5 (the axis of the center housing 2) and (This tongue) is arranged so as to be inscribed at the seal point P, and is arranged so as to be inscribed at the inner circumferential surface 5b of the rotating sleeve 5.
A substantially crescent-shaped space 8 is formed between the outer circumferential surface 7b of the rotor 7 and
is formed.

One of the side housings 3 (the left side housing in FIG. 2) has a space 8 opposite to the space 8.
A suction boat 9 is provided on the railing side (the left side in FIG. 1) of the space 8, and a discharge boat 10 is provided on the leading side (the right side in FIG. 1) of the space 8. In addition, an annular seal groove 11 is formed in the inner wall surfaces 3a, 3a of both side housings 3°3 in correspondence with both end surfaces 5c, 5c of the rotary sleeve 5.
, 11 are formed, and each seal recess 11 is equipped with a side seal 12 that slides into contact with the rotary sleeve end surface 5C to provide a gas seal.

Further, the rotor 7 has support holes 13 provided in both side housings 3.3 at its shaft portions 7a, 7a, respectively.
．． 13 and hair wank 14. One shaft part 7a (the shaft part on the right in FIG. 2) extends outside the casing 1, and the extending part of the shaft part 7a has an engine A pulley 15 connected by a belt drive is attached to a rotary drive device (not shown), and the rotor 7 is driven to rotate via the pulley 15 by the external rotary drive device.

Furthermore, the outer circumference of the rotor 7 @7bL has a plurality of (four in the figure) vane grooves 16 recessed in the radial direction along the axial direction.
．． 16 are formed at equal intervals in the circumferential direction, and a plate-shaped vane 17 is fitted into each vane groove 16 so as to be slidable and retractable in the half direction of the rotor 7. The vanes 17, 17... (are subjected to centrifugal force when the rotor 7 rotates, and their outer ends are brought into airtight pressure contact with the inner circumferential surface 5b of the rotating sleeve 5, so that the inner circumferential surface 5b of the rotating sleeve and the rotor The space 8 with the outer circumferential surface 7b is formed into four compression chambers 18, 18,
..., and in this state, the rotating sleeve 5
7JJ: is made to rotate synchronously with the rotor 7.

Roughly speaking, the rotating sleeve 5 has a large number of small holes L19 that communicate the compression chamber 18 and the air bearing chamber 6.
, 19 . . . are provided, and the air in the pressure accommodation chamber 1B is jetted and supplied to the air bearing chamber 6 to form a bearing layer 11 between the rotating sleeve '5 and the center housing 2. There is.

When the rotor 7 is rotationally driven in the X direction in FIG. 1 by an external rotational drive device such as an engine, the LC vanes 17 fitted in the vane grooves 16 of the rotor 7 are each subjected to centrifugal force. The outer end thereof is the inner circumferential surface 5b of the rotating sleeve 5.
By press-fitting the rotating sleeve in an airtight state, the space 8 between the rotating sleeve inner circumferential surface 51) and the rotor outer circumferential surface 7b is defined into four compression chambers 18, 18, and this state is maintained. Meanwhile, the rotational force of the rotor 7 is applied to the vanes 17,1.
7... to the rotating sleeve 5, and the rotating sleeve 5 rotates synchronously with the rotor 7. As the rotor 7 and the rotating sleeve 5 synchronously rotate, the volume of the compression chamber 18 changes synchronously, and as the compression chamber 18 moves from the suction boat 9 side to the discharge ports 1 to 10 side, it gradually changes. After increasing to the number one detective, it gradually decreases.

As a result, the air sucked into the compression chamber 18 from the suction boat 9 is compressed and pressurized within the compression chamber 18, and then is discharged from the discharge boats 1 to 10 to the outside of the casing 1.

At that time, a part of the high-pressure air in the compression chamber 18 located near the discharge ports 1 to 10 flows through the communication holes 19, 19, etc. due to the pressure difference between the compression chamber 18 and the air bearing chamber 6. The air is injected into the air bearing chamber 6 to form an air bearing link layer in the air bearing chamber 6, thereby preventing the rotating sleeve 5 and the center housing 2 from coming into contact with each other.

As a feature i12 of the present invention, the center housing 2 is made of aluminum, the rotating sleeve 5 is made of aluminum, and the inner circumferential surface 5b and outer circumferential surface 5a thereof are anodized, and the vanes 17 are made of aluminum.
is made of carbon.

Next, the reasons for limiting the materials and surface treatments mentioned above will be explained. The reason why the center housing 2 is made of aluminum is to reduce the weight and improve heat dissipation. This soaked heat dissipation property lowers the temperature of the center housing inner circumferential surface 2a, and promotes heat dissipation from the rotating sleeve outer circumferential surface 5a. As a result, the ambient temperature of the outer circumferential surface 5a of the rotary sleeve is lowered, the thermal load on the rotary sleeve 5 is reduced, and its durability can be improved.Frictional resistance is reduced, and the driving torque of the rotary compressor is reduced. It is possible to reduce the

Furthermore, the reason why the rotating sleeve 5 is made of aluminum is that
By reducing the inertia ff1ffi, the ability to follow the rotation of the rotating sleeve 5 with respect to the rotation of the rotor 7 is improved, and the responsiveness of the discharge air pressure to fluctuations in the rotor rotation speed is improved, and the heat dissipation performance of the rotating sleeve 5 is improved. This improves the heat dissipation properties of the center housing 2 and the compression chamber 18.
This is to increase the volumetric effect ψ of the intake air and improve the compression efficiency by lowering the humidity. In addition, since it is possible to promote the dissipation of heat generated by the sliding contact with the vane 17, it is possible to prevent the binder such as resin contained in the material of the vane 17 from softening, and to prevent the rotation sleeve 5 and the vane 17 from softening. This is also because it is possible to suppress an increase in sliding resistance.

Furthermore, the inner circumferential surface 5b and the outer circumferential surface 5a of the rotating sleeve 5
The purpose of applying alumite treatment to the rotary sleeve 5 is to improve the high-temperature strength of the rotating sleeve 5 and suppress generation of frictional heat.
This is to improve the wear resistance of both the vane 17 and the center housing 2. In this case, since a common alumite treatment is applied to the inner and outer circumferential surfaces 5a and 5b,
The surface treatment of the rotating sleeve 5 can be performed with good workability.

The reason why the vane 17 is made of carbon is that it has excellent adhesion to the aluminium 1 to the treated rotating sleeve inner circumferential surface 51) and can improve the airtightness of the compression chamber 18. Here, since the outer end of the vane 17 and the inner circumferential surface 51 of the rotating sleeve come into sliding contact through the 131 alumite layer, the vane 17 is not scraped by the skin contained in the aluminum. Therefore, the carbon abrasion powder of the vane 17 does not adhere to the inner circumferential surface 51 of the rotating sleeve and further abrasion of the vane 17 as in the conventional case.

Therefore, in the above embodiment, since the center housing 2 and the rotating sleeve are made of aluminum,
The weight of the rotary compressor can be reduced compared to conventional ones made of cast iron (this also improves heat dissipation, increases the volumetric efficiency of intake air, and improves compression efficiency). .

In addition, since the thermal load on the outer circumferential surface 5a of the rotating sleeve 5 is reduced and the high-temperature strength is improved by the alumite treatment, it is possible to prevent thermal deformation at high temperatures. Since this improves the durability of the rotating sleeve 5, it is possible to further reduce the thickness and weight of the rotating sleeve 5.

Furthermore, since the vane 17 is made of carbon that has good adhesion to the inner circumferential surface 5b of the rotating sleeve which has been treated with the aluminium 1, the airtightness of the compression chamber 18 can be improved. Moreover, the amount of wear can be reduced by the action of the alumite layer, and the wear resistance can be kept low to reduce drive torque loss.

Now, we will specifically examine the center housing temperature and discharge air temperature relative to the rotor rotational speed, as well as the center housing temperature and discharge air temperature relative to the rotor rotational speed, for a cast iron center housing fitted with a cast iron rotating sleeve and an aluminum rotating sleeve fitted. Mutual efficiency was measured and the results are shown in FIGS. 3 and 4, respectively.

In addition, as for the above experimental conditions, the rotary compressor has rotor 1.
The volume discharged per rotation is 400 cc/re■, the discharge pressure is Oki/crj G, and 1ooO~
The rotor rotation speed was kept constant for 5 minutes at each measurement rotation speed of 5 o o o rpm, and the center housing temperature was determined by installing a thermal lightning pair at a depth of 2 inches from the inner peripheral surface of the center housing. It was measured by In addition, the broken line in the figure shows the temperature of the center housing, the solid line shows the discharge air pressure, and in FIG.

Of b, a indicates a rotating sleeve made of cast iron, and b indicates a rotating sleeve made of aluminum.

Both figures show that the center housing temperature and discharge air temperature are both lower with the aluminum rotating sleeve than with the cast iron rotating sleeve, and the volumetric efficiency is improved, thus improving the heat dissipation of the rotating sleeve. It is recognized that there are

Next, the aluminum center housing was fitted with a cast iron rotating sleeve, the aluminum center housing was fitted with an aluminum rotating sleeve, and the inner and outer peripheral surfaces were anodized as in the above example. Regarding the example of the present invention in which an aluminum rotating sleeve is fitted,
The center housing temperature, discharge air temperature, and volumetric efficiency with respect to the rotor rotational speed were measured under the same experimental conditions as above, and the results are shown in FIGS. 5 and 6, respectively. 8C in the figure shows an aluminum rotating sleeve J (an example of the present invention) which has been subjected to alumite treatment.

Both figures show that the aluminum rotating sleeve lowers both the center housing temperature and the discharge air temperature and improves the volumetric efficiency compared to the cast iron rotating sleeve, and these trends are even more pronounced in the example of the present invention. It can be seen that the heat dissipation property d5 and the volumetric efficiency are greatly improved.

In addition, a rotary compressor equipped with an aluminum center housing and carbon vanes was fitted with an aluminum rotary sleeve that was not treated on the inner and outer surfaces (comparative example), and an alumite treated rotary compressor was fitted. Regarding the IC invention example, the rotor rotation speed is 500 Orpm.
The wear amount of the vanes was measured after 3 hours of continuous operation, and the results are shown in Figure 7. The experimental conditions are that the rotary compressor has a capacity of 400 cc/rev and a discharge pressure of OK.
q/ad G's.

According to the figure, the amount of wear in the example of the present invention is reduced to about 1/10 compared to the comparative example, and it can be seen that the alumite treatment applied to the inner peripheral surface of the rotating sleeve significantly improves the wear resistance.

[Brief explanation of drawings]

1 and 2 illustrate an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional front view, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG.
Figures 4 and 4 show the results of an experiment comparing the heat dissipation properties of aluminum and cast iron rotating sleeves for a cast iron center housing, and Figure 3 shows the center housing temperature and discharge air temperature with respect to the rotor rotation speed. Figures 4 and 4 show the volumetric efficiency versus rotor rotational speed, and Figures 5 and 6 show the heat of each rotating sleeve made of cast glass, made of aluminum, made of aluminum, and made of anodized aluminum with respect to the aluminum center housing. A diagram corresponding to FIG. 3 and a diagram corresponding to FIG. 4 showing the experimental results comparing the dissipation properties, respectively, and FIG. 7 are diagrams showing the experimental results comparing the amount of wear of carbon vanes with and without alumite treatment. 1...Casing, 2...Center housing, 3
...Side housing, 5...Rotating sleeve, 5a
...Outer circumferential surface, 5b...Inner circumferential surface, 7...Rotor, 1
7...Bane. Patent applicant Toyo Kogyo Co., Ltd. Figure 1 Figure 2 Procedural amendment @ (spontaneous) May 30, 1980 Commissioner of the Patent Office Kazuo Wakasugi 1, Indication of the case 1988 Special yr a No. 60381 2, Invention Name Rotary Compressor 3 with Rotating Sleeve, Relationship with the Amendment Case Patent Applicant Address 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Name (313) Representatives of Toyo Kogyo Co., Ltd. W. Itsuki Yamazaki 4 Agent @550den06 (4,45) 21287
, Contents of amendment (1) The entire text of the specification shall be amended as in the attached amended specification. (2) In FIG. 7 of the drawings, the symbol rPJ is added and corrected as indicated in red ink on the attached correction drawing (copy). 8. List of attached documents (1) Amended Mei MO @ 1
(2) Amended drawing (copy) 1
Amended Specification 1, Title of the Invention Rotary compressor 2 with rotating sleeve on the right, Claims (1) A casing formed of a cylindrical center housing and side housings disposed on both sides of the cylindrical center housing; A rotary sleeve rotatably fitted in the casing, a rotor disposed centered around the rotation center of the rotary sleeve and rotationally driven from the outside, and a rotor fitted to the rotor so as to be freely projectable. and a plurality of plate-shaped vanes, the center housing is made of an aluminum gong, A rotary compression type 1 type with a rotating sleeve characterized in that the rotating sleeve is made of aluminum 1 gong, and the inner and outer peripheral surfaces thereof are treated with aluminium 1 or more, and the vanes are made of carbon.: 3. Detailed Description of the Invention (Industrial Application Field) The present invention is used as a mechanical supercharging device for intake supercharging in an engine, for example, and is a rotary supercharging device having a rotating sleeve that rotates synchronously with a rotor. Related to Compressors (Prior Art) Rotary compressors having such a rotating sleeve have been known for some time (for example, "Volume Expansion Compressor" (published by Sangyo Zuyu Co., Ltd. on April 5, 1978)). (See Figure 15.1(a)). That is, a cast iron rotating sleeve is rotatably fitted into a casing formed by a cylindrical cast iron center housing and side housings arranged on both sides of the casing, and a rotor driven from the outside is fitted into the casing. It is arranged eccentrically with respect to the rotation center of the
A plurality of plate-shaped vanes are fitted into the rotor so as to be retractable, and the rotary sleeve is rotated along with the rotor through a hole in the rotation of the rotor. Oil is supplied between the rotating sleeve and the center housing, and the oil bearing layer prevents the two from coming into contact. This kind of rotary compressor is advantageous in terms of durability because the rotary sleeve rotates together with the vane, which prevents heat generation and wear caused by the sliding of the vane tip. Recently, it has been attracting attention as an optimal supercharger for engines that operate over a wide range of rotations. However, in the above-mentioned conventional system, the center housing and the rotating sleeve are made of cast iron and have poor heat resistance, so the surface temperature of both, especially the surface temperature of the rotating sleeve, becomes high during operation. The volumetric efficiency of the air sucked into the compression chamber defined by the inner circumferential surface and the rotor outer circumferential surface decreases, the frictional resistance on the outer circumferential surface of the rotating sleeve increases, and the overall weight of the rotary compressor increases. There's a problem. Therefore, it is conceivable to solve the above problem by, for example, forming the rotating sleeve from aluminum, which has clear and pumice heat dissipation properties. However, in this case, even if only the rotating sleeve is made of aluminum, heat dissipation from the rotating sleeve is inhibited by the high-temperature inner peripheral surface of the cast iron center housing, and as a result, the rotating sleeve reaches its high temperature limit. A problem arises in that the heat deforms when the metal reaches the target. Therefore, it is conceivable to go further and form both the center housing and the rotating sleeve from an aluminum alloy to lower the temperature of the center housing and further reduce the weight. In sliding contact between aluminum, which has poor abrasiveness,
Since seizure occurs in the high-speed rotation range of several thousand revolutions per minute (111 mm), it is not practical as an engine supercharger. (Object of the Invention) The object of the present invention is to specify the '4Δ quality and surface treatment of the component parts of the compressor in order to put into practical use a rotary compressor having a durable and right-cut rotary sleeve as described above. This not only reduces the weight of the rotary compressor, but also increases the volumetric efficiency of the intake air and improves compression efficiency.It also improves the heat resistance and abrasion resistance of the center housing of the rotary sleeve and the vanes, making them more durable. The aim is to improve sexual performance. (Structure of the Invention) In order to achieve the above object, the solution of the present invention provides a rotary compressor having a rotary sleeve as described above.
The center housing is made of aluminum alloy, the rotating sleeve is made of aluminum alloy, and its inner and outer peripheral surfaces are anodized, and the vanes are made of carbon. As a result, in the present invention, the temperature of the compression chamber is lowered and the heat load on the rotating sleeve is reduced due to the heat dissipation properties of the aluminum of the rotating sleeve, I5, and center housing. By aluminizing the inner and outer peripheral surfaces of the rotating sleeve, thermal deformation of the rotating sleeve is suppressed and wear resistance is improved, and frictional resistance between the rotating sleeve and the carbon vane is reduced. (Effects of the Invention) Therefore, according to the present invention, it is possible not only to reduce the weight of a rotary compressor having a rotary sleeve, but also to maintain the temperature of the compression chamber at a low level and improve the volumetric efficiency of intake air. In other words, it is possible to increase the compression efficiency, reduce the thermal load on the rotating sleeve and improve its durability, and also improve the wear resistance of the rotating sleeve, which improves its durability and A rotary compressor with a highly durable rotary sleeve can be put to practical use because it can be further made lighter and smaller, and the frictional resistance between the rotary sleeve and vane can be reduced, reducing drive torque loss. With the present invention, it is possible to provide and realize an optimal engine supercharger etc. (Example) Hereinafter, an example as a specific example of the technical means of the present invention will be described based on the drawings. 1 and 2 show an embodiment of the present invention, 1 is a casing, and the casing 1 includes a cylindrical center housing 2 and side housings 3, 3 disposed on both the left and right sides of the cylindrical center housing 2. is a plurality of (four in the figure) fastening bolts 4.
, 4.... A cylindrical rotating sleeve 5 whose outer diameter is slightly smaller than the inner diameter of the center housing 2 is fitted into the casing 1 so as to be rotatable and concentric with the axis of the center housing 2. The gap between the outer circumferential surface 5a of the center housing 2 and the inner circumferential surface 2a of the center housing 2 (for example, 30 to 50μ)
An air bearing chamber 6 is formed by this. Further, inside the rotary sleeve 5, a cylindrical shaft 7 with shaft portions 7a and 7a on both ends is offset with respect to the rotation center of the rotary sleeve 5 (the axis of the center housing 2). A substantially crescent-shaped space 8 is provided between the inner circumferential surface 5b of the rotary sleeve 5 and the outer circumferential surface 7b of the rotor 7. is formed. One of the side housings 3 (the left side housing in FIG. 2) has a space 8 opposite to the space 8.
Suction boat 9 is located on the trailing side (left side in Figure 1) of
Furthermore, discharge boats 10 are opened on the leading side of the space 8 (on the right side in FIG. 1). In addition, an annular seal groove 11 is formed in the inner wall surfaces 3a, 3a of the both side housings 3°3, corresponding to both end surfaces 5G, 5C of the rotary sleeve 5.
, 11 are formed, and a side seal 12 is installed in each of the seal grooves 11 in sliding contact with the end surface 5C of the rotary sleeve for gas sealing. Further, the rotor 7 has support holes 13.1 and 13.2 provided in the respective side housings 3.3 in the shaft portions 7a, 7a.
13 via bearings 14.14, one shaft portion 7a (the right shaft portion in FIG. 2) extends outside the casing 1, and the extending portion of the shaft portion 7a A pulley 15 which is belt-driven and connected to a rotary drive device such as an engine (not shown) is mounted, and the rotor 7 is rotationally driven via the pulley 15 by the external rotary drive device. Furthermore, the outer circumferential surface 7b of the rotor 7 has a plurality of (four in the figure) vane grooves 16 recessed in the radial direction along the axial direction.
16 are formed at equal intervals in the circumferential direction, and a plate-shaped vane 17 is fitted into each vane groove 16 so as to be slidable and retractable in the radial direction of the rotor 7. The vane 1
In 7.17..., when the rotor 7 rotates, the outer end part receives centrifugal force and comes into airtight pressure contact with the inner circumferential surface 5b of the rotating sleeve 5, so that the inner circumferential surface 5b of the rotating sleeve and the outer circumferential surface 7b of the rotor The space 8 is divided into four compression chambers 18. ．． 18...
In this state, the rotating sleeve nib 5 is rotated in the same direction as the rotor 7. Furthermore, the rotating sleeve 5 has a large number of communication holes 19.1 which are small holes that communicate the compression chamber 18 and the air bearing chamber 6.
9 are arranged in stages, and the air in the compression chamber 18 is ejected and supplied to the air bearing chamber 6 to form an air bearing layer between the rotating sleeve 5, the center housing 2, and □. When the rotor 7 is rotationally driven in the X direction in FIG. 1 by an external rotation drive device such as an engine, the vanes 17 fitted in each vane groove 16 of the rotor 7 are subjected to centrifugal force. The outer end portion is brought into airtight pressure contact with the inner circumferential surface 5b of the rotating sleeve 5, so that the inner circumferential surface 5b of the rotating sleeve 5
b and the rotor outer peripheral surface 7b is defined into four compression chambers 18, 18..., and while maintaining this state, the rotational force of the rotor 7 is applied to the vanes 17, 17, .
- is transmitted to the rotating sleeve 5), and the rotating sleeve 5 rotates synchronously with the rotor. As the rotor 7 and the rotating sleeve 5 synchronously rotate, the volume of the compression v18 changes synchronously, and gradually increases as the compression chamber 18 moves from the suction boat 9 side to the discharge boat 10 side. After reaching the maximum volume, it gradually decreases. As a result, the air sucked into the compression chamber 18 from the suction boat 9 is compressed and pressurized within the compression chamber 18, and then is discharged from the discharge boat 10 to the outside of the casing 1. At that time, a part of the high pressure air in the pressure m chamber 18 located near the discharge ports 1 to 10 flows through the communication holes 19, 19, etc. due to the pressure difference between the compression chamber 18 and the air bearing chamber 6. The air is injected into the air bearing chamber 6 through the air bearing chamber 6 to form an air bearing layer within the air bearing chamber 6, thereby preventing the rotating sleeve 5 and the center housing 2 from coming into contact with each other. As a feature of the present invention, the center housing 2 is made of aluminum, the rotating sleeve 5 is made of aluminum, and the inner circumferential surface 5bJ5 and outer circumferential surface 5a are anodized, and the vane 17 is made of aluminum. Made of carbon. Next, the reason for limiting the above-mentioned +Δ trade and surface treatment will be explained. The reason why the center housing 2 is made of aluminum is to reduce the weight and improve heat dissipation. Due to this excellent heat dissipation property, the temperature of the inner circumferential surface 2a of the rehinter housing decreases, and the outer circumferential surface 5 of the rotating sleeve
Heat dissipation from a is promoted. As a result, the ambient temperature around the outer circumference 5a of the rotating sleeve decreases, and the rotating sleeve 5
The heat load on the material can be reduced and its durability can be improved. Furthermore, the reason why the rotating sleeve 5 is made of aluminum is that
By reducing the inertial weight, the rotation of the rotating sleeve 5 can follow the rotation of the rotor 7, improving the responsiveness of the discharge air pressure to fluctuations in the rotor rotation speed, and improving the heat dissipation of the rotating sleeve 5. This is to reduce the temperature of the compression chamber 18 in combination with the improvement in heat dissipation of the center housing 2, thereby increasing the volumetric efficiency of the intake air and improving the compression efficiency. Since it is possible to promote the dissipation of the heat generated by sliding with the vane 17, it prevents the binder such as resin contained in the material of the vane 17 from softening, and the rotation sleeve 5 and This is also because an increase in sliding resistance with the vane 17 can be suppressed. Furthermore, the inner circumferential surface 5b and the outer circumferential surface 5a of the rotating sleeve 5
The purpose of the alumite treatment is to suppress the thermal deformation of the rotating sleeve 5 and the generation of frictional heat, as well as to improve the abrasion resistance of the vane 17 and the center housing 2. In this case, since the inner and outer circumferential surfaces 5a and 5b are subjected to a common alumite treatment, the surface treatment of the rotating sleeve 5 can be performed with good workability. Furthermore, the reason why the vane 17 is made of carbon is that it has excellent conformability to the alumite-treated inner circumferential surface 51 of the rotating sleeve and can improve the airtightness of the compression chamber '18. . Here, since the outer end of the vane 17 and the inner circumferential surface 51 of the rotating sleeve are in sliding contact through the alumite layer, the vane 17 is not scraped by S contained in the aluminum. Therefore, the carbon thick layer of the vane 17 does not adhere to the inner circumferential surface 5b of the rotating sleeve and further abrasion of the vane 17 as in the conventional case. Therefore, in the above embodiment, since the center housing 2 and the rotary sleeve are made of aluminum alloy, the weight of the rotary compressor can be reduced compared to the conventional one made of aluminum alloy, and the heat dissipation can be reduced. It is possible to increase the volumetric efficiency of the intake air and improve the compression efficiency. In addition, since the rotating sleeve 5 reduces the thermal load on the outer circumferential surface 5a and suppresses thermal expansion by the aluminium treatment,
It can prevent thermal deformation due to high temperature IK'j,
In addition, the aluminium treatment improves the abrasion resistance, so the durability of the rotating sleeve 5 can be improved, and it is possible to further reduce the thickness and weight.Furthermore, the vane 17 is Since it is made of carbon that has good conformability to the inner circumferential surface 5b of the sleeve, it is possible to improve the airtightness of the compression chamber 18.Moreover, the amount of wear can be reduced by the action of the alumite layer. At the same time, it is possible to minimize the running resistance and reduce the drive torque loss.Specifically, we will discuss two types of housings: one in which a cast iron rotating sleeve is fitted to a cast iron center housing, and the other in which a cast iron rotating sleeve is fitted to a cast iron center housing. For the fitted parts, the center housing temperature, discharge air temperature, and volumetric efficiency with respect to the rotor rotational speed were measured, and the results are shown in Figures 3 and 4, respectively.The above experimental conditions were as follows: The rotating IEiE compressor has a discharge volume of 400 cc/r per rotation of the rotor.
eV, the discharge pressure is Oki/crl G, and 10
At each measured rotation speed from 00 to 5000 rpm, the rotor rotation speed was held constant for 5 rpm. 1, and the center housing temperature was measured by installing a thermal lightning pair at a depth of 2 mm from the inner peripheral surface of the center housing. In addition, the broken line in the figure shows the center housing temperature, the solid line shows the discharge air temperature, and in Fig. 4 the volumetric efficiency is shown, and each line does not show the vJ quality (of 48ab, a is a rotating sleeve made of cast iron, b is a rotating sleeve made of aluminum). Both figures show that the aluminum rotating sleeve has lower center housing temperature and discharge air pocket temperature than the cast iron rotating sleeve, and has improved volumetric efficiency. Therefore, it is recognized that the heat dissipation performance of the rotating sleeve is improved.Next, there is a case in which a rotating sleeve made of rust-resistant aluminum is fitted to an aluminum center housing, and a case in which a rotating sleeve made of aluminum is fitted to a center housing made of aluminum. (Example of the present invention) under the same experimental conditions as above. The center housing temperature, discharge air temperature, and volumetric efficiency with respect to the rotor rotational speed were measured, and the results are shown in Figures 5 and 6, respectively.It should be noted that the aluminium 1~ treatment was applied to C in the figure. Aluminum rotating sleeve (survey conducted by the present invention)
This shows that. Both figures show that the center housing temperature and discharge air humidity are both lower and the volumetric efficiency is improved in the aluminum rotating sleeve compared to the cast iron rotating sleeve, and these trends are even more pronounced in the example of the present invention. It can be seen that heat dissipation and volumetric efficiency are greatly improved. Furthermore, a comparative example in which an aluminum rotary sleeve with no treatment applied to the inner and outer peripheral surfaces was fitted to a rotary compressor equipped with an aluminum center housing and carbon vanes, and an alumite treatment. Regarding the example of the present invention, the rotor rotation speed was 500 Orp.
The vane wear m was measured after continuous operation for 3 hours at m, and the results are shown in FIG. The experimental conditions were rotational compression); the volume was 400 cc/rev, and the discharge pressure was ○kq/ciG. According to the figure, the wear fd in the example of the present invention is reduced to about 1/10 compared to the comparative example, and the wear resistance is significantly improved due to the aluminium treatment applied to the inner peripheral surface of the rotating sleeve. I understand that. 4. Brief description of the drawings FIGS. 1 and 2 illustrate embodiments of the present invention, where FIG. 1 is a longitudinal sectional front view, and 2M is a sectional view taken along the line TI-II in FIG.
Fig. 3 d5 and Fig. 4 show the experimental results comparing the heat dissipation properties of each rotary sleeve made of aluminum 1XiFJ and cast iron for a cast iron center housing. ``3'' and the figure showing the discharge air temperature, Figure 4 is a figure showing the volumetric efficiency with respect to the total number of revolutions.
, shows the results of an experiment comparing the heat dissipation properties of rotating sleeves made of aluminum and those made of aluminum treated with "Aluminium 1" - Fig. 3 corresponds to A3 and Fig. 4 corresponds to Fig. 7, respectively, and Fig. 7 shows anodized aluminum rotating sleeves. FIG. 3 is a diagram showing the results of an experiment comparing the amount of wear of carbon vanes with and without treatment. 1...Casing, 2...Center housing, 3
...Side housing, 5...Rotating sleeve, 5a
...Outer peripheral surface, 5b...Inner peripheral surface, 7...[1-Even, 1
7...Bane. Figure 1 Figure 2

Claims (1)

[Claims] (1) A casing formed of a cylindrical center housing and side housings arranged on both sides of the cylindrical center housing;
A rotating sleeve rotatably fitted into the casing, a rotor arranged eccentrically with respect to the rotation center of the rotating sleeve and rotationally driven from the outside, and a plurality of rotors fitted into the rotor so as to be freely retractable. In the rotary compressor, the center housing is made of aluminum, the rotary sleeve is made of aluminum, and the rotary sleeve is made of aluminum, and the rotary sleeve is made of aluminum and has an inner peripheral surface. A rotary compressor having a rotating sleeve, characterized in that the d5 and outer circumferential surface are anodized, and the vanes are made of carbon.