JPS59192887A - Rotary sleeve for rotary compressor - Google Patents

Abstract

PURPOSE:To prevent seizing of the rotary sleeve and the increase of the load of compressor by a method wherein the rotary sleeve is formed by Al-Si series alloy and the inner and outer peripheral surfaces thereof are formed with hardwearing resin layers. CONSTITUTION:The rotary sleeve 6 is formed by the Al-Si alloy and the inner and outer peripheral surfaces 6a, 6b thereof are formed with anodized alminum 17 by anodizing process. Further, the outer peripheral surface 6b of the rotary sleeve 6 becomes rough properly by anodizing process, therefore, the hardwearing resin layer 18 is formed by coating. The material of epoxy resin base is used as the material of the resin layer 18.

Description

[Detailed Description of the Invention] (Field of use of Ajitao-1-) Kii and Akira are lj1'I! 1. I] ~Vagina; Concerning improvement of Iso's sleeve.

(Conventional branch body j) Conventionally, one rotation of an air pump, etc.
It has been made into a cylindrical housing sink with a cylindrical housing sleeve and 1.1-
, the outer end surfaces of vanes of a number of radially supported on a rotor that is offset from the sleeve are brought into contact with the inner circumferential surface of the rotating sleeve by centrifugal force, and the rotor is rotated with the rotor.
11 wide 1 (M) is a type of machine that makes 1 batch of bean paste.

This type of compressor compresses air at almost the same speed as the rotating sleeve, so it has the advantage of reducing the sliding fLc resistance of the vane. Recency 1'A'1 is the most suitable mortar for engines etc. that are operated in a wide range of revolutions. 1 Hotaru Kanada 11;
17! j - Pressure 1; Compressed pieces generated during the stroke (Thus, rotation / l'!, sleeve... Eccentricity with respect to Ussing A1, rotation 11! A, outside of sleeve 10
00 surface or inner circumference of the housing 1fii: Pushing hard, 1(rrao'1) causes strong sliding resistance, which causes wear and seizure of the sleeve during the first cycle, and further compresses the first cycle. This results in the problem that the machine's driving torque increases.
This is a particularly important problem when supporting the oral sleeve without lubrication.

By the way, in Japanese Patent Application No. 58-8596, the present applicant proposed a carbon vane with excellent wear resistance in adhesion to a mating material such as a sleeve in the span of a rotary compressor. In order to improve the pivot torque and reduce the pivoting torque, the counter material of the vane is made of Al-5i type A gold, and the
A method has already been proposed in which an anodic oxide film (alumite) is formed on the material and -C1 is further post-treated.

(Object of the Invention) The present invention is a further development of the technology of the above-mentioned prior application by applying it to the rotation 11t=sleeve of a rotation transmission compressor having a rotation sleeve. In addition to adopting A4-5i alloy as A7-
To provide a rotary compressor that can reduce as much as possible the sliding resistance that may occur between a rotating sleeve made of a 5i alloy and its housing, and therefore does not cause scorching or an increase in load. It is something.

(Structure of the Invention) Therefore, the present invention provides a rotary compressor of the above type equipped with a rotary sleeve, in which the rotary sleeve is formed of an Al-5i alloy, and the inner and outer peripheral surfaces of the rotary sleeve are anodized. It is characterized in that a coating is formed and a wear-resistant resin layer is formed on at least the outer peripheral surface of the sleeve.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the attached drawing (1).

1 and 2, 1 is a rotary compressor, 2 is a casing of the rotary compressor 1, and cylindrical center housing 3
Side housings 4, 4 are attached to both sides of the housing with bolts and nuts 5.

Reference numeral 6 denotes a cylindrical A7-5i type alloy sleeve 6 which is freely provided in the casing 2 and has an outer diameter slightly smaller than that of the cylindrical center housing 3. Air ejected from the ejection holes (not shown) drilled at appropriate locations causes the circle' and the receptacle-shaped center housing 3 to
An air layer 7 is formed between the inner circumferential surface 3a of the rotary sleeve 76 and the outer circumferential surface 6b of the rotating sleeve 76,
It is supported without lubrication as shown in the figure. (Director,
In FIG. 1, the gap between the circle-shaped center housing 3 and the rotating sleeve 6 is shown to be large for illustration purposes, but in reality it is extremely small, 30 to 50 .mu.m. ) 8 is a rotor provided in the casing 2 so as to be freely rotatable with its axis eccentric to the axis of the rotation transmission sled 6, and a shaft 8a protruding to both sides in the axial direction.

8b or bearings 9.9 provided in the side housings 4, 4
A boot IJ 10 is attached to one shaft 8a on the outside of the side housing 4. In addition,
This boot IJ 10 is not specifically shown or is driven by a belt by a prime mover or the like.

The rotor 8 has four grooves 11 and 11 formed at right angles to each other from its outer surface to the vicinity of the shaft center. It is slidably inserted in the semi-uniform direction so that it can protrude toward the peripheral surface 6a.

The vane 12 is formed in the groove 11 by the centrifugal force caused by the rotation of the rotor 8.
The outer end surface 12a of the rotating sleeve 6 is biased in the direction of protruding further, and the outer end surface 12a is brought into contact with the inner circumferential surface 6a of the rotary sleeve 6, and this contact causes the space between the sleeve 6 and the rotor 8 to be rotated. Room 13a.

It is divided into 13b, 13C, and 13d.

In addition, 14 is buried in the 1117th surface of the side housings 4, 4, and Il! The ring-shaped side seals 15 and 16 that receive the 21 rotor sleeve 6 are suction ports and discharge ports respectively opened in the site housing 4 on the side opposite to the drive side of the rotor 8.

On the other hand, as shown in FIG. 3, the inner circumferential surface 6a and outer circumferential surface 61 of the sleeve 6, which is made of an Al-5i alloy, is anodized using anodic acid.
Then, an anodic oxide film (alumite) 17.17 is formed. The thickness of this anodic oxide film 17.17 is 100 to 30
It is preferable to set it to about 0μ.

By alumite treatment of this rotating three flow, rotation i17
Since the strength of the sleeve 6 is improved, thermal deformation, especially local deformation, of the rotating sleeve 6 is prevented. In addition, due to the increase in the hardness of the A4 heath, in order to obtain a hardness balance between the hardness of the Si grains and the hardness of the Si grains, only the Si grains protrude from the surface of the inner circumferential surface 6a of the rotary sleeve 76 and are removed from the vane 12. The phenomenon of scratching and abrasion of the end surface 12;l can be effectively prevented. Furthermore, as for the outer peripheral surface 61) of the rotating sleeve 6, the surface is appropriately roughened by the alumite treatment, so that it can be closely matched with the resin coating described later.
Your sex will improve.

At the same time, the outer circumferential surface 6 of the alumite-treated rotating sleeve 6
In 1), a wear-resistant resin layer 18 is formed by coating.

Used for coating the wear-resistant resin layer 18'
From NjIIM□, T+, 1□6□II @ 1°. 6. . Yes, solid lubrication; (1 = 10-120)
It is preferable to mix 5 to 50 volumes of flaky metal in a dispersed state with 1 part per volume and 1 part per volume. As the wear-resistant resin, epoxy resin may be used.
] For carbon-based lubricants such as molyftene disulfide, boron nitride, and graphite, fluororesin powders and well-known solid lubricants 7K1J are used. It is used to improve peeling resistance, and can be made of aluminum, for example. For example, an epoxy resin with excellent heat resistance and abrasion resistance is used as the bonding side of the base, and a mixture of scale-like Al and fluororesin powder with excellent (l'3'/I°1 properties) is used. It is preferable that the scale-like A/! contain scale-like metal Ih), which is preferable in order to improve the strength of the resin layer 18 itself and the adhesion (bondability) with the base material (rotating sleeve). If it is less than 5 parts by volume, wear will increase due to lack of sulfur resistance and peeling resistance of the coating, and if it is more than 50 parts by volume, it will cause a decrease in lubricity; Therefore, the amount of wear increases.

If the amount of solid 11i'j r'ti agent is less than 10 parts by volume, the driving force and coating wear may be affected due to insufficient lubricity.
1. If the amount is less than 120'r1' parts, the holding power of the solid lubricant by the resin becomes weak, and the lubricant is rubbed off or falls off from the coating, resulting in a decrease in lubricity.

The layer thickness of this abrasion-resistant resin layer 18 is approximately 100 to 300 μm or so.

In this way, by coating the anodic oxide film 17 on the outer circumferential surface 6b of the single-turn sleeve 6 with resin, the sliding resistance against the inner circumferential surface 3a of the cylindrical center housing 3 is reduced.

A durability test was conducted on the rotating sleeve 6 configured as described above. The test conditions are as follows.

O) The cylindrical center housing 3 is made of /J alloy, and the inner circumferential surface 3a is plated with hard Cr (roughness 2μ or less after polishing).

(2) The rotating sleeve 6 is made of an A4-5i alloy, and the inner circumferential surface 6a and outer circumferential surface 6b are hard alumite treated. Table 1 shows the detailed composition of the AJ-5i alloy.

Incidentally, samples containing 17% and 15% of Si were also prepared for comparison.

■ Abrasion resistance + M, I fat composition 2! Ti! 1l
ll is shown in Table 2.

Table 2 (Capacity) jj, j old) ■ Pump capacity used 400CC pump rotation &
5000rpm test time
IQIIr Figure 4 shows the results of the variation in the driving torque of the rotary compressor 1 under the above conditions. The alpha taste of the mark is as shown in Table 3.

Table 3 L-year-old, ·, 4th v-1, X includes S1 Jh)- is 7%
The numbers indicate J'Li containing 20% Si.

In Figure 4, first, the 4i
If it is, the one with 0 fat coating is 11! e
Compared to that of the coating [phase], the initial! This is an increase of 20 to 30% compared to the dynamic torque, which is a large fluctuation for one dynamic torque.

On the other hand, those that are anodized and have a resin coating [phase] are not much different from those that are anodized and have a resin coating [phase], but those that have been anodized and have no resin coating have an initial driving torque of ,Alumite treatment@,
Not only is the IQ lower than that of the one-fat coating [with]
It can be seen that even after I-1r, j9A, the dynamic torque hardly changes.

In addition, those with a large amount of Si containing [1;
Figure 5 shows the results of the 11th measurement of wear h; on the outer peripheral surface 61 of the sleeve 6 after the durability test (after 1011r). Regardless of whether they are alumite-treated or without corners, the ones with 1,61 fat coating and those with anodized 37Φ have no burns, but they have some localized, It is thought that the wear caused by abnormal wear occurs due to the long-term operation (\\), which may cause burn-out.Compared to these, the alumite treatment [with] and resin coating [phase] have a lower amount of wear. It is acknowledged that the number of respondents is overwhelmingly small.

In this case, when comparing the resin coating [phase] with the alumite treatment [phase] and the alumite treatment, it is clear that when alumite treatment is applied, thermal deformation of the rotating sleeve 6, especially local heat It is recognized that deformation can be effectively prevented.

In addition, Fig. 6 shows the results of wear A11 on the outer end surface 12a of the carbon vane 12 after the Tsukuyuki test (after IQIIr). The most effective method is to prevent thermal deformation, and if a 4☆1 fat coating is applied in addition, it is possible to further reduce IV (wear and tear). 2 and times 1 wok three 76 (!: (17) I
HI hM dynamic resistance is +V wear of carbon vane 12! It also has a large effect on J1, indicating that by reducing the sliding resistance between the rotating three-flow and the casing 2, the wear -1 of the carbon vane 12 can also be reduced to the fj effect. .

(Effect of the invention) As is clear from the light, the present invention forms an anodic oxide film on the sleeve, and at least the outer peripheral surface of the sleeve is coated with 1lli, Ij\: wear discharge. Since the oil layer is formed on the sleeve, the sliding resistance on the outer circumferential surface of the sleeve is reduced, the abrasion resistance is reduced, and the driving torque can be reduced.

In addition, in the embodiment r) ij, the outer circumferential surface c7 of the rotating sleeve. ) CI'6i Although we attempted to reduce the redness of the carbon vanes by coating them with oil, it goes without saying that it is also possible to apply a coating of oil to each rotary three-wheel.

[Brief explanation of drawings]

Figure 1 is a front sectional view of the compressor, Figure 2 is a sectional view taken along the T-I line in Figure 751, Figure 3 is an enlarged cross-section of the bottom part of Figure 2, and Figure 4 is a sectional view of the compressor. JP, 4 dynamic torque fluctuation due to no alumite treatment and negative or no resin coating: 11
．． Fig. 5 is a graph showing the amount of wear on the outer circumference (Hl) of the rotating sleeve, and Fig. 6 is a graph showing the wear h1 of the carbon vane. 1...Rotary compression: Number, 2...Casing, 3...
・Cylindrical center housing, 6 times (yellow sleeve,
6: Inner circumferential surface, 61)... Outer circumferential surface, 7... Empty layer, 8... Rotor, 12... Hehn, 15... Inhalation [-1, 16 Exhalation November] , 17...Anode rjν coating, 18...-jφ wear-resistant resin layer. Special +i'l Applicant: Toyo Kogyo Co., Ltd.1.
Outside 1 person Kawa 1 person) F buried soil -11 mountain
Hotato 2 Otsu Figure 3 Sj Figure 4 Figure 5 Figure 6 4 Procedural amendment 1 ・11 indications 1982 Patent application No. 66722-2 Name of invention II: Relationship with the case of a patent applicant representative Yoshiki Yamazaki ((1 Tomoe) 4
Agent 7 (Contents of equal pressure Four rules Ze 4, correct the following iMIWl. Invention details 111] 1 situation light) 1 Ze・j (1) 7th message 3rd line [Strength improves Therefore, the phrase "to suppress thermal expansion" should be corrected to "to suppress thermal expansion." (2) Page 7, No. 4-11 "Correct the phrase "prevented." to read "suppressed." It says, ``Sen ii no i strong le J and 1. no stop. , [(禾 occupancy), convergence (tlji・ro no 1) correction furnace 14
1-Love I desecration) Ruume and aloof 3, jQ Hiro [Katagata] and tfJ""Do 3゜ (5) No. 9-cho ↓'s Table 1 Busy 1 Kanki-like rjJ'- +lX, (0) -1 1 1 dj, 2nd ear 1
``1-20% 1'', ``15%''eJ'JE. I”d

Claims (1)

[Claims] Inside the cylindrical house sink, there is a cylindrical lj, ill'll'tl sleeve provided rotatably within the cylindrical house sink, and within the house sink, the sleeve rotates eccentrically with respect to the axial center. It is provided with a freely cut opening and a vane set in a groove formed in the rotor, and the outer surface of the vane is in contact with the sleeve. The space with is 1/1 of the number of pieces.
'The time when the moving room was divided] IV, 11・X11
1 aircraft IC,” - record 42, sleeve is At-5i
The inner circumferential surface and the outer surface of the sleeve are made of an alloy based on the 1iJ, ]il/, inner peripheral surface and outer surface of the sleeve. '', 11111 is anodized rotary sleeve of rotary compressor.