JPH1073085A - Scroll type fluid machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily form a lubricant supply passage to a boss part of a plate body by composing the lubricant supply passage out of a communication hole drilled along the plate thickness direction of the plate body of the first scroll member and communicated to the bass part and a lubricant passage or the like for allowing the gas containing lubricant to pass a gap between the plate body and an anti-wear material. SOLUTION: A lubricant supply passage 15 for communicating a stream pocket 10 with the boss part 30a of a movable scroll member 3 is formed in a scroll type steam machinery 1. In this case, a communication hole 150 for composing the supply passage 15 is drilled along the plate thickness direction of the first plate body 30 and a lubricant passage 151 is formed in a gap between the side wall surface of the first spiral body 31 and the inside surface of a gap 50 of the first anti-wear material 5. And also a pressure reducing passage 152 is formed between the first plate body 30 and an anti-wear material 5 so as to communicate the lubricant passage 151 to the communication hole 150 and also to gave such gas as containing the lubricant in the stream pocket 10 reduced in its pressure to allow it to pass the communication hole 150. Thereby, a working process for forming the lubricant supply passage 15 is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll-type fluid machine used as, for example, a compressor of a vehicle air conditioner.

[0002]

2. Description of the Related Art FIG.
0 to 12, the first plate 30 and the first plate 30
A first scroll member 3 having a first spiral body 31 formed on one surface of the first plate member 30 and having a boss portion 30a formed on the other surface of the first plate member 30; A second scroll body facing the body, and a second spiral body formed on one surface of the second scroll body, and combined with the first scroll member to form a first scroll member 2 and a second scroll member 4 constituting a fluid pocket 10
And a main shaft 7 connected to the first scroll member 3 at a portion of the boss portion 30a and driving the first scroll member 3, and a lubricating oil supply passage 15 for communicating the fluid pocket 10 with the boss portion 30a is provided. There are things that are formed.

In the case of a conventional scroll type fluid machine, a needle bearing 14 is generally press-fitted into a boss 30a, and a crankpin 70 of a main shaft 7 is inserted into the needle bearing 14 with an eccentric bush 13 interposed. Thus, the first scroll member 3 is connected to the main shaft 7. As described above, the boss portion 30a of the first scroll member 3 is provided with a bearing or the like, so that lubricating oil must be supplied to the bearing or the like. For this reason, conventionally, the lubricating oil supply passage 1
5 are formed. Through this lubricating oil supply path 15,
The lubricating oil mixed with the gas in the fluid pocket 10 is forcibly supplied. At this time, in order to reduce the compression loss and supply an appropriate amount of lubricating oil, conventionally, as shown in FIGS.
Pocket 10 and boss 30 away from the center of the
The lubricating oil supply passage 15 may be configured to communicate with the lubricating oil supply passage 15 (see, for example, Japanese Utility Model Laid-Open Publication No. Sho 59-142490), or as shown in FIG. An orifice or a fine hole is formed as 15, and the gas containing the lubricating oil in the fluid pocket 10 at the center of the scroll member 3 is depressurized by the lubricating oil supply path 15,
The power is forcibly supplied to the boss 30a.

[0004]

However, in the conventional type shown in FIG. 10, the lubricating oil supply passage 15 must be formed in the first plate 30 at an angle to one surface thereof. The workability was remarkably poor.

[0005] The type shown in FIG.
A communication passage 156 is formed in the radial direction from the outer peripheral portion of the plate body 30 toward the center thereof, and the communication passage 156 is formed at a location away from the center of the first plate body 30 so as to communicate with the communication passage 156. A hole 157 is formed in one surface of the first plate 30 in the plate thickness direction, and the other surface of the first plate 30 is connected to the communication path 156 at the center of the first plate 30. Hole 15 in the thickness direction
8 and a sealing plug 15 is provided at the outer end of the communication passage 156.
9, the communication path 15 which is long in the radial direction.
Since it is difficult to form No. 6 and the number of processing steps is large, the workability of this conventional example is also extremely poor.

Further, the type shown in FIG.
Since an orifice or a fine hole must be provided in a limited space of the plate body 30, the workability and the assemblability thereof are very difficult.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a scroll type fluid machine capable of easily forming a lubricating oil supply passage for a boss of a first plate.

[0008]

According to the first aspect of the present invention, there is provided a first plate body, and a first spiral body formed on one surface of the first plate body. A first scroll member having a boss portion formed on the other surface of the first plate member, a second plate member facing the first plate member, and a second scroll member formed on one surface of the second plate member. A second scroll member which has two spiral members, is combined with the first scroll member and forms a fluid pocket together with the first scroll member, and has a shape corresponding to the first spiral member. And a wear-resistant material disposed on one surface of the first plate body, and a main shaft connected to the first scroll member at a portion of the boss portion and driving the first scroll member; A scroll having a lubricating oil supply passage communicating the pocket with the boss. In the type fluid machine, the lubricating oil supply passage is formed in the first plate body along a thickness direction of the first plate body, and a communication hole communicating with the boss portion, and one end surface of the wear-resistant material in a thickness direction. A lubricating oil passage extending between the first plate and the wear-resistant material, the lubricating oil passage extending between the first plate and the wear-resistant material. A pressure reducing passage configured to communicate between the lubricating oil passage and the communication hole and to reduce the pressure of the gas containing the lubricating oil in the fluid pocket to pass through the communication hole. Thus, a scroll type fluid machine is obtained.

According to the second aspect of the present invention, the pressure reducing passage utilizes a minute gap generated by a surface roughness of at least one of the first plate and the wear-resistant material. The scroll type fluid machine according to claim 1 is obtained.

According to a third aspect of the present invention, the surface roughness is caused by substantially mesh-like streaks generated when the first plate body is subjected to cutting. Item 2 is a scroll type fluid machine.

According to the fourth aspect of the present invention, the lubricating oil supply passage is formed in at least one of the first plate body and the wear-resistant material and collects the lubricating oil that has entered the pressure reducing passage. The scroll type fluid machine according to any one of claims 1 to 3, wherein the scroll type fluid machine includes a groove for flowing into the communication hole.

According to the fifth aspect of the present invention, the lubricating oil passage is constituted by a gap formed between the first spiral body and the wear-resistant material. A scroll type fluid machine according to any one of claims 4 is obtained.

According to the invention of claim 6, the lubricating oil passage includes an opening formed in the wear-resistant material in the vicinity of the communication hole. A scroll type fluid machine according to any one of claims 1 to 3 is obtained.

According to a seventh aspect of the present invention, in the scroll type fluid machine according to the sixth aspect, the opening is a semicircular notch formed in a side edge of the wear-resistant material. can get.

According to an eighth aspect of the present invention, there is provided the scroll-type fluid machine according to the sixth aspect, wherein the opening is a hole formed in the wear-resistant material near the communication hole. .

[0016]

In the scroll type fluid machine according to the present invention, the lubricating oil supply passage is constituted by a communication hole, a lubricating oil passage, and a pressure reducing passage. Since the communication hole has a decompression passage, it is not necessary to cause a decompression action. Therefore, the communication hole does not need to be a fine hole, and a hole having a normal diameter is formed in the first plate body in the thickness direction. It can be easily formed by drilling along. The lubricating oil passage is basically a gap formed between the first spiral body and the wear-resistant material, and therefore, the lubricating oil passage is necessarily configured. The decompression passage is basically
Since the gap is formed between the first plate and the wear-resistant material, it is not necessary to perform special processing on the first plate or the wear-resistant material. In such a lubricating oil supply passage, the compressed gas containing the lubricating oil in the fluid pocket flows into the depressurizing passage through the lubricating oil passage, where it is depressurized, flows into the communication hole, and passes through the communication hole. It enters the boss portion of the first scroll member. The lubricating oil that has flowed into the boss together with the gas in this way performs lubrication between the first scroll member and the main shaft.

[0017]

FIG. 1 is a longitudinal sectional view of a scroll type fluid machine according to a first embodiment of the present invention, and FIG. 2 is II in FIG.
FIG. 3 is a cross-sectional view taken along line III-III in FIG.

Referring to FIGS. 1 to 3, this scroll type fluid machine 1 includes a casing 2, a movable scroll member (first scroll member) 3, a fixed scroll member (second scroll member) 4, , First and second wear-resistant materials 5 and 6, and a main shaft 7.

The casing 2 comprises a substantially cup-shaped casing body 20 and a front end plate 21.
The front end plate 21 includes a substantially ring-shaped plate portion 21a and a substantially cylindrical shape, and a boss portion 21b fixed to the plate portion 21a by bolts (not shown).

The movable scroll member 3 includes a first plate 30
And a first spiral body 31 formed on this one surface. At the center of the other surface of the first plate 30, a boss 30
a is formed. The movable scroll member 3 is arranged inside the casing 2.

The fixed scroll member 4 includes a second plate 40
And a second spiral body 41 formed on this one surface. A discharge port 40 a is formed in the center of the second plate body 40. The fixed scroll member 4 is fixed to a portion near the bottom of the casing main body 20 with bolts 8, and the discharge chamber 9 is configured by the second plate 40 of the fixed scroll member 4 and the bottom of the casing main body 20. .
The fixed scroll member 4 is combined with the movable scroll member 3 such that the first spiral body 31 and the second spiral body 41 are engaged with each other. Has a plurality of pairs of fluid pockets 10.

The first wear-resistant material 5 is made of the first spirally wound body 3.
A spiral space 50 corresponding to No. 1 is provided. First
Is disposed on one surface of the first plate 30 while allowing the first spiral body 31 to pass through the gap 50.

Similarly, the second wear-resistant material 6 has a spiral space 60 corresponding to the second spiral body 41. The second wear-resistant material 6 is disposed on one surface of the second plate 40 while allowing the second spiral body 41 to pass through the gap 60.

The main shaft 7 has a crank pin 70, is disposed in the casing 2, and is held by the casing 2 with ball bearings 11, 12 interposed therebetween. It protrudes from inside the casing 2. The crank pin 70 is mounted on the eccentric bush 13.
Is inserted into the needle bearing 14 press-fitted into the boss portion 30a of the movable scroll member 3 with the interposition of the needle bearing.
Thus, the main shaft 7 is connected to the movable scroll member 3 at the boss 30a of the movable scroll member 3.

The scroll-type fluid machine 1 is provided with a lubricating oil supply passage 15 that communicates the fluid pocket 10 with the boss 30a of the movable scroll member 3. The lubricating oil supply passage 15 includes a communication hole 150, a lubricating oil passage 151,
And a pressure reducing passage 152. The communication hole 150 is
The first plate 30 is formed at the center thereof along the thickness direction thereof. The communication hole 150 does not need to be decompressed in the gas in the fluid pocket 10 as in the related art, and therefore does not need to be a fine hole, and may be a hole having a diameter that can be easily processed. In the case of the present embodiment, the lubricating oil passage 151 is formed by a gap formed between the side wall surface of the first spiral body 31 and the inner surface of the gap 50 of the first wear-resistant material 5. Decompression passage 1
52 is formed between the first plate body 30 and the first wear-resistant material 5, communicates the lubricating oil passage 151 with the communication hole 150, and depressurizes gas containing lubricating oil in the fluid pocket 10. Through the communication hole 150. In the case of the present embodiment, the decompression passage 151 utilizes the surface roughness of one surface of the first plate body 30, that is, the minute gap generated by the minute unevenness.

More specifically, generally, the scroll member is formed by casting to form a casting having a shape close to a finished product, roughing the surface of the casting by cutting, and then performing finishing by cutting. , But
In the present embodiment, the cutting process is performed on one surface of the first plate body 30 by appropriately selecting the finished surface roughness, and after the cutting is completed, a substantially mesh-like small streak is formed. (For example, the finished surface roughness is selected such that the depth of the streaks is in the range of 5 μm to 10 μm). Then, by placing the first wear-resistant material 5 on the processed surface, a substantially net-like fine passage is formed. In the present embodiment, the fine passage is formed.
The pressure reducing passage 152 is used.

The length of the pressure reducing passage 152 and the pressure reducing passage 1
By appropriately setting the state of 52 (the surface roughness of one surface of the first plate body 30) and the like, a desired depressurizing action can be obtained.

In this embodiment, the pressure reducing passage 152 is formed by utilizing the surface roughness of one surface of the first plate 30.
The present invention is not limited to this, and the pressure reduction passage may be formed by using the surface roughness of the first wear-resistant material 5, or the surface roughness of both the first plate body 30 and the first wear-resistant material 5 The decompression passage may be formed by utilizing the above. In addition, a casting surface may be left on one surface of the first plate member 30 to form a reduced-pressure passage by utilizing fine irregularities of the casting surface. At least one of the wear materials 5 may be subjected to a process for generating fine irregularities or streaks, and the irregularities or streaks may be used to form a decompression passage.

FIG. 4 is a sectional view of the same portion of the scroll type fluid machine according to the second embodiment of the present invention as shown in FIG. 2, and FIG. 5 is a sectional view taken along line VV of FIG.

Referring to FIG. 4 and FIG.
Except for the lubricating oil supply passage, the configuration is the same as that of the first embodiment. Therefore, the same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted. .

In the case of this embodiment, the lubricating oil supply path 15
As in the first embodiment, the communication hole 150, the lubricating oil passage 1
51, and a pressure reducing passage 152. In the present embodiment, a groove 153 is further added. This groove 153
Is formed on one surface of the first plate body 30 and extends from the side surface near the center end of the first spiral body 31 to the communication hole 150. The groove 153 is for collecting the lubricating oil that has entered the pressure reducing passage 152 and flowing the lubricating oil to the communication hole 150. By changing the width and depth of the groove 153, the flow rate of the lubricating oil flowing from one fluid pocket 10 located at the center of the scroll members 3 and 4 into the internal space of the boss 30a of the movable scroll member 3 is adjusted. can do.

In the case of the present embodiment, the groove 153 is formed in the first plate 30. However, the present invention is not limited to this, and a groove forming a part of the lubricating oil supply path is formed in the wear resistant material. Alternatively, a groove that forms a part of the lubricating oil supply path may be formed in both the first plate and the wear-resistant material in the same path.

FIG. 6 is a sectional view of a scroll type fluid machine according to a third embodiment of the present invention at the same site as FIG.

Referring to FIG. 6, this embodiment is a modification of the second embodiment and has substantially the same configuration as that of the second embodiment. Are denoted by the same reference numerals as in the second embodiment, and description thereof is omitted.

In this embodiment, two grooves 30 are formed on one surface of the first plate 30. Thus, the number of grooves forming a part of the lubricating oil supply path is not limited.

FIG. 7 is a sectional view of the same portion of the scroll type fluid machine according to the fourth embodiment of the present invention as shown in FIG. 2, and FIG. 8 is a sectional view taken along line VIII-VIII of FIG.

Referring to FIG. 7 and FIG.
Except for the lubricating oil supply passage, the configuration is substantially the same as that of the first embodiment.
The same reference numerals as those in the first embodiment denote the same parts, and a description thereof will be omitted.

In the case of the scroll type fluid machine 1 according to the present embodiment, the lubricating oil supply passage 15 includes a communication hole 150, a lubricating oil passage 151, and a pressure reducing passage 152, as in the first embodiment. However, the present embodiment is slightly different from the first embodiment in the configuration of the lubricating oil passage 151. In the first embodiment, the lubricating oil passage 151 is constituted only by a gap generated between the side wall surface of the first spiral body 31 and the inner surface of the gap 50 of the first wear-resistant material 5. In the case of the embodiment, the lubricating oil passageway 151 has an opening 151a in addition to the above-described gap. In the case of the present embodiment, the opening 151a is formed of a semicircular notch formed at a side edge near the tip of the first wear-resistant material 5. The opening (notch) 151a can be easily formed by press working or the like. By changing the size, position, number, and the like of the openings (notches) 151 a, the substantially mesh-like streaks formed on one surface of the first plate 30 directly below the first wear-resistant material 5 are formed. The magnitude of the aperture effect produced by the central part can be adjusted.

FIG. 9 is a sectional view of a scroll type fluid machine according to a fifth embodiment of the present invention at the same site as FIG.

Referring to FIG. 9, this embodiment is a modification of the fourth embodiment and has substantially the same configuration as that of the fourth embodiment. Are denoted by the same reference numerals as in the fourth embodiment, and description thereof is omitted.

In this embodiment, a circular hole is used as the opening 151a. By changing the size, position, number, and the like of the openings (holes) 151a, the openings (holes) 151a are formed on one surface of the first plate body 30 directly below the first wear-resistant material 5, as in the fourth embodiment. It is possible to adjust the magnitude of the squeezing effect caused by the central portion of the formed substantially mesh-shaped streaks.

[0042]

According to the scroll-type fluid machine of the present invention, the lubricating oil supply passage is formed along the thickness direction of the first plate to communicate the fluid pocket with the boss of the first plate. And a lubricating oil passage extending from one end face to the other end face in the thickness direction of the wear-resistant material and passing a gas containing lubricating oil in a fluid pocket between the first plate body and the wear-resistant material. And a pressure reducing passage formed between the first plate body and the wear-resistant material, communicating between the lubricating oil passage and the communication hole, and reducing the pressure of the gas containing the lubricating oil in the fluid pocket and passing the gas through the communication hole. Has been
Processing for forming the lubricating oil supply path is easier than before. Therefore, in the scroll type fluid machine of the present invention, the lubricating oil supply path can be configured more simply than in the past.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a scroll type fluid machine according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a sectional view of a scroll type fluid machine according to a second embodiment of the present invention at the same site as FIG. 2;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a sectional view of a scroll type fluid machine according to a third embodiment of the present invention at the same site as FIG. 2;

FIG. 7 is a sectional view of a scroll type fluid machine according to a fourth embodiment of the present invention at the same site as FIG. 2;

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7;

FIG. 9 is a sectional view of a scroll type fluid machine according to a fifth embodiment of the present invention at the same site as FIG. 2;

FIG. 10 is a longitudinal sectional view of a scroll type fluid machine of a first conventional example.

FIG. 11 is a longitudinal sectional view of a scroll type fluid machine of a second conventional example.

FIG. 12 is a longitudinal sectional view of a scroll type fluid machine of a third conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Scroll type fluid machine 2 Casing 3 Movable scroll member (1st scroll member) 4 Fixed scroll member (2nd scroll member) 5 1st wear-resistant material 6 2nd wear-resistant material 7 Main shaft 10 Fluid pocket 15 Lubricant supply Road 30 First plate body 30a Boss part 31 First spiral body 40 Second plate body 41 Second spiral body 50 Void 60 Void 150 Communication hole 151 Lubricating oil passage 151a Opening 152 Decompression passage 153 Groove

Claims (8)

[Claims] 1. A first plate body and a first spiral body formed on one surface of the first plate body, and a boss portion is formed on the other surface of the first plate body. A first scroll member, a second plate member facing the first plate member, and the second plate member;
A second scroll member having a second spiral body formed on one surface of the plate member, the second scroll member being combined with the first scroll member to form a fluid pocket together with the first scroll member; and A wear-resistant material having a shape corresponding to the spiral body, and disposed on one surface of the first plate body;
A main shaft connected to the first scroll member at the boss portion and driving the first scroll member;
In a scroll type fluid machine in which a lubricating oil supply path communicating the fluid pocket and the boss portion is formed, the lubricating oil supply path is formed in the first plate body along a thickness direction thereof. A communication hole communicating with the boss portion, extending from one end surface in the thickness direction of the wear-resistant material to the other end surface,
A lubricating oil passage for passing a gas containing lubricating oil in the fluid pocket between the first plate and the wear-resistant material; and a lubricating oil passage formed between the first plate and the wear-resistant material; A scroll-type fluid machine, comprising: a pressure reducing passage that communicates the lubricating oil passage with the communication hole and depressurizes a gas containing lubricating oil in the fluid pocket to pass the gas through the communication hole. 2. The scroll according to claim 1, wherein the pressure reducing passage utilizes a minute gap generated by a surface roughness of at least one of the first plate and the wear-resistant material. Type fluid machinery. 3. The scroll-type fluid machine according to claim 2, wherein the surface roughness is generated by substantially mesh-like streaks generated when the first plate body is subjected to cutting. . 4. A groove formed in at least one of the first plate and the abrasion-resistant material, wherein the lubricating oil supply passage collects the lubricating oil that has entered the pressure reducing passage and flows it into the communication hole. 2. The method according to claim 1, wherein
The scroll-type fluid machine according to any one of claims 1 to 3. 5. The lubricating oil passage according to claim 1, wherein the lubricating oil passage is formed by a gap formed between the first spiral body and the wear-resistant material. A scroll type fluid machine according to claim 1. 6. The lubricating oil passage according to claim 1, wherein the lubricating oil passage includes an opening formed in the wear-resistant material near the communication hole. The scroll-type fluid machine according to claim 1. 7. The scroll-type fluid machine according to claim 6, wherein the opening is a semicircular notch formed in a side edge of the wear-resistant material. 8. The hole according to claim 6, wherein the opening is a hole formed in the wear-resistant material near the communication hole.
The scroll-type fluid machine according to claim 1.