JP2003106269A - Scroll fluid machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll fluid machinery provided with a discriminating means for discriminating each of a plurality of chip seals. SOLUTION: In this scroll fluid machinery wherein a fixed scroll 2 and a revolving scroll 11 are provided with chip sealing grooves on lap tips, and chip seals are fitted in the grooves, and slid with a mating sliding face to form an enclosed space, the discriminating means are mounted on chip seals for discriminating a plurality of kinds of chip seals, when the plurality of kinds of chip seals are fitted to the chip seal grooves.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll fluid machine for compressing, expanding, and pumping a fluid, and in particular, when there are a plurality of tip seals fitted in a tip seal groove, the plurality of tip seals are provided. The present invention relates to a scroll fluid machine formed by providing identification means for identifying a species.

[0002]

2. Description of the Related Art Conventionally, in an oilless scroll fluid machine, a tip seal is provided between the top of the scroll wrap and the mating sliding surface in order to shield the enclosed space formed by the fixed scroll wrap and the orbiting scroll wrap. Intervenes. Two tip seals are required for the fixed scroll and the orbiting scroll. However, since both need to use the same parts, the number of parts is one, and it is not necessary to distinguish between the fixed scroll and the orbiting scroll during assembly.

However, the scroll fluid machine takes in fluid from the outer peripheral side of the scroll end plate and sequentially compresses it toward the inner peripheral side, and high heat is generated in the process, so that the inner peripheral side becomes higher in heat than the outer peripheral side. It is necessary to change the material of the tip seal from the outer peripheral side toward the inner peripheral side in consideration of heat resistance and expansion coefficient. It is also conceivable to use a ring-shaped tip seal on the inner peripheral side and connect the tip seal from the outer periphery to the tip seal. In these cases, the tip seals from the outer peripheral side to the inner peripheral side are divided into a plurality of pieces, and a plurality of tip seal types made of different materials are prepared and assembled.

Further, as described in JP-A-54-59608, two combinations of a fixed scroll wrap and an orbiting scroll wrap are provided on a single scroll end plate of a scroll fluid machine, and a front stage is provided on the outer peripheral side. A technique is known in which a second-stage compression section is formed on the compression section and the inner peripheral side to perform two-stage compression. Also in the case of this technique, the tip seals from the outer peripheral side to the inner peripheral side are divided into a plurality of pieces, and a plurality of tip seal types of different materials are prepared and assembled.

[0005]

Therefore, in such a case, a plurality of chip seal types are prepared and assembled, and the discrimination is complicated, so that it is necessary to use an identification display that can be easily identified.

Further, since the closed space formed by the fixed scroll wrap and the orbiting scroll wrap normally generates high heat by compressing the fluid, in the case of an oilless fluid machine, the orbiting scroll and the solid scroll are cooled by cooling air. The high heat generated by the compression of the fluid is cooled.

However, in order to sufficiently cool the scroll by the cooling air, the structure becomes complicated, a high technology is required, the manufacturing cost rises, and the selling price rises. Therefore, the design target is set to some extent in consideration of the selling price and durability, but in that cooling performance, the friction between the tip seal member and the sliding surface of the other side is caused by the high heat generated by the compression of the fluid. If it is promoted and the predetermined driving time is exceeded, the airtightness of the chip seal member is deteriorated.
Therefore, it is necessary to replace the tip seal with a simple operation.

In view of the above-mentioned circumstances, it is an object of the present invention to provide a scroll fluid machine formed by providing identification means for identifying each of a plurality of tip seal types.
Another object of the present invention is to provide a scroll fluid machine having a tip seal that can be easily identified when assembled. Another object of the present invention is to provide a scroll fluid machine having a tip seal that can be easily identified when the tip seal is replaced. Another object of the present invention is to provide a scroll fluid machine in which the tip seal can be mounted in the tip seal groove by a simple operation during assembly or replacement. Another object of the present invention is to provide a scroll fluid machine capable of preventing erroneous mounting of the tip seal in the tip seal groove during assembly or replacement.

[0009]

According to the present invention, a tip seal groove is provided at the tip of a wrap of a fixed scroll and an orbiting scroll, a tip seal is fitted in the groove, and a sliding space is rubbed against a mating sliding surface to form a sealed space. In the scroll fluid machine to be formed, when there are a plurality of types of tip seals fitted in the respective tip seal grooves, the tip seal is provided with an identification means for identifying the plurality of types of tip seals.

According to this invention, when there are plural kinds of chip seals fitted in the respective chip seal grooves,
Since the tip seal is provided with an identification means for identifying multiple types of tip seals, it is easy to use the tip seal type that fits in the tip seal groove when the scroll fluid machine is assembled or when the tip seal is replaced. Since it can be recognized and fitted, it is easy to assemble and replace, and erroneous assembly and erroneous replacement can be prevented.

It is desirable that the discriminating means has a different outer diameter so that it can be visually or tactually recognized. Examples of these identification means are different length dimensions, different material colors, different tip seal dimensions corresponding to the width direction or groove bottom direction of the tip seal groove, tip seal width direction or groove bottom direction. Are partially formed in different shapes (for example, a protrusion or a recess can be formed in the tip seal end portion or in the width direction or groove bottom direction at an arbitrary position).
And the like, and may be a combination of one of to and the other.

Therefore, the length or the material color of the tip seal is made different for each tip seal type to form the identification means, and the tip seal groove width direction of the tip seal or It is also an effective means of the present invention that at least one of the tip seal types can be identified by making the identification means by grouping by making the thickness in the groove bottom direction or the partial shape different.

Further, the tip seal groove wall surface or the groove bottom surface is provided with a partially different concave and convex shape, and the portion corresponding to the concave and convex shape of the chip seal is formed with a shape engaging with the concave and convex shape. The use of means is also an effective means of the present invention.

According to such a technical means, the tip seal groove wall surface or the groove bottom surface of the scroll wrap with which the tip seal is fitted is provided with partially different concave and convex shapes, and the portion corresponding to the concave and convex shape of the tip seal is provided. Since the identification means of the tip seal type engages with the shape provided in the groove of the scroll wrap, the scroll fluid machine is performing the compression operation. It is possible to prevent the tip seal from expanding due to the rise in temperature, and to prevent it from coming out of the tip seal groove to become a load when the scroll wrap revolves and to prevent compressed fluid from leaking.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative positions, etc., of the components described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples unless otherwise specified. Not too much.

FIG. 1 is a sectional view of a scroll fluid machine according to an embodiment of the present invention, FIG. 2 is a perspective view of a fixed scroll housing, FIG. 3 is a perspective view of an orbiting scroll, and FIG.
[Fig. 4] is an explanatory view showing a shape of a tip seal.

In FIG. 1, a multi-stage scroll fluid mechanism body 1 comprises a fixed scroll housing 2 to which a housing cover 4 is attached, and a drive shaft housing 3 to which the fixed scroll housing 2 is attached. The fixed scroll housing 2 (see FIG. 2) is formed in a circular tray shape, and the fixed scroll wrap groove 27 on the outer periphery is formed up to the front discharge hole 2e of the land portion 9a.
The front scroll compression section of the fixed scroll is formed, and the fixed scroll wrap groove 28 formed on the inner circumferential side from the rear suction hole 2f of the land 9a forms the rear compression section.

A cooling chamber 24 is provided between the discharge pipe 6 attached to the discharge hole 2e of the former compression unit and the suction pipe 7 attached to the suction hole 2f of the latter compression unit. The discharge pipe 6 and the suction pipe 7 are connected by a pipe to form an intermediate path.

The fixed scroll housing 2 is shown in FIG.
As shown in FIG. 3, mounting portions 2i, 2j, 2 which are coupled to the drive shaft housing 3 at the coupling surface 2m at three locations on the outer peripheral surface in the circumferential direction.
k is provided, the concave portion is provided with a mirror surface 2c (see FIG. 1), and the mirror surface 2c is provided in the inside of the mounting portion 2i.
It communicates with a. The coupling surface 2m is provided with a groove inside the portion that is not coupled to the drive shaft housing 3 and inside the groove, and a self-lubricating dust seal 12 of fluorine resin or the like is disposed in the groove.

The mirror surface 2c is provided with a front-stage discharge hole 2e connected to the discharge pipe 6 shown in FIG. 1 and a rear-stage suction hole 2f connected to the suction pipe 7, which is opposite to the land portion 9a where these holes are formed. A fixed scroll wrap 9b that forms a front-stage compression portion in the clockwise direction and a fixed scroll wrap 9c that forms a rear-stage compression portion in the clockwise direction are spirally planted.

A groove is provided at the upper end of these laps, and the groove has a groove bottom of the latter compression section extending from the joint portion 29 shown in FIG. It is cut deeper than the groove bottom of the previous stage compression section extending in the direction.
A chip seal 14 having a self-lubricating property, such as a fluorine resin, is fitted in the groove.

The tip seal 14 is a joint between the land 9a and the tip seal 14a for the front side fixed scroll wrap corresponding to the front stage compression portion extending from the joint 29 of the land 9a to the end 30 in the counterclockwise direction. It is composed of a tip seal 14b for the rear side fixed scroll wrap corresponding to the rear stage compression portion extending from 29 to the end portion 31 in the clockwise direction. The tip seal 14b for the fixed scroll wrap on the rear side is formed thicker in the groove bottom direction than the tip seal 14a on the front side. However, the front side and the rear side may be formed as one continuous tip seal.

As shown in FIG. 1, a cooling fin 2b is planted on the back side of the mirror surface 2c of the fixed scroll housing 2, and a housing cover 4 is attached to the top of the cooling fin 2b to form a cooling passage 2n. ing. Therefore, FIG.
The fixed scroll is configured to be cooled by the cooling air flowing in the direction of penetrating the sheet. A pipe 5 is attached to the passage 2a so that the fluid can be taken in.

The orbiting scroll 11 has a mirror surface 10c,
As shown in FIG. 1, the orbiting scroll wrap is arranged so that the mirror surface 10c is in contact with the dust seal 12 provided on the coupling surface of the fixed scroll housing 2 and faces the mirror surface 10c. 10a (see FIG. 3) and the orbiting scroll wrap 10b which is planted on the center side and constitutes a latter-stage compression section.

A groove is provided at the upper end of these laps, and a tip seal 13 having a self-lubricating property such as a fluorine resin is fitted in the groove. The tip seal 13 includes a tip seal 13a for a front-stage orbiting scroll wrap corresponding to a front-stage compression portion extending from the end 34 to the end 32 in a counterclockwise direction, and a tip 33 from the end 35 to the end 33 in the clockwise direction.
And a tip seal 13b for a rear stage orbiting scroll wrap corresponding to the rear stage compression section. The tip seal 13b for the scroll wrap on the rear side is formed thicker in the groove bottom direction than the tip seal 13a on the front side. And, these orbiting scroll wraps 10a,
10b is a fixed scroll wrap 9b, 9c shown in FIG.
And the wall surface are arranged facing each other.

On the back side of the mirror surface 10c, cooling fins 11a are planted as shown in FIG.
An auxiliary cover 15 is attached to the top of a, and the cooling passage 11
forming n. Therefore, the orbiting scroll can be cooled by the cooling air flowing in the direction passing through the plane of the drawing of FIG.

The auxiliary cover 15 is provided with a bearing bearing 18 on the center side to which the tip eccentric portion 16a of the rotary drive shaft 16 is rotatably fitted, and on the outer peripheral side, a portion divided into three equal parts in the circumferential direction. A bearing bearing 19 for receiving a crank member for preventing rotation of the orbiting scroll is arranged in the.

This crank member is composed of a shaft 22 fitted to the bearing bearing 19 on one surface of the plate member 21 and a shaft 23 having an axial position eccentric to the shaft 22 on the other surface, The shaft 23 is configured to be fitted and positioned with a bearing bearing 20 provided in the drive shaft housing 3. Therefore, the eccentric rotation of the tip eccentric portion 16a of the rotary drive shaft 16 allows the orbiting scroll 11 to orbit with respect to the fixed scroll.

The drive shaft housing 3 has an opening in a direction penetrating the plane of the drawing of FIG. 1 and is configured to be able to cool the fin 11a portion of the orbiting scroll by flowing cooling air. Then, by the bearing bearing 17 in the central portion, the rotary drive shaft 16 connected to the rotary shaft of the drive motor (not shown).
Is rotatably held.

Scroll body 1 constructed in this way
As shown in FIG. 1, the rotation of the rotary drive shaft 16 causes
The orbiting scroll 11 orbits as the eccentric shaft portion 16a rotates about the axis 16b, and the fluid sucked from the suction passage 2a of the fixed scroll housing 9 is taken in by the orbiting scroll wrap 10a (FIG. 3). It is taken in by the enclosed space formed by this wrap and the wrap 9b (FIG. 2) of the fixed scroll.

This closed space is sequentially compressed, and the front-stage discharge hole 2
From e, it is sequentially compressed from the second-stage suction hole 2f through the intermediate path and sent to the central portion, and then discharged from the second-stage discharge hole 2d and discharged from the pipe 8.

FIG. 4 is an explanatory view showing the shape of the tip seal type. (A) shows 1st Embodiment of a chip seal shape. Orbiting scroll tip seal, which is higher in pressure than the former compression section, is used for the latter stage compression section tip seal 14b, the former stage compression section tip seal 14a, and the fixed scroll tip seal, which is higher pressure than the former stage compression section. 13b, tip seal 13a for pre-stage compression section
And the length of the tip seal is increased.

Therefore, in this case, it can be visually identified. Therefore, if the tip seals having different lengths are prepared as a group, the scroll fluid machine can be easily assembled and the tip seals can be easily replaced.

FIG. 4B is an explanatory view showing a second embodiment of the tip seal shape. The difference from the first embodiment is that the first embodiment has a fixed scroll tip seal 13
The second embodiment includes a tip seal 13b for the rear-stage compression section and a tip seal 13a for the front-stage compression section, whereas the second embodiment is a tip seal for an orbiting scroll. The point is that a fixed scroll tip seal longer than the tip seal 14a for the compression portion is constituted by one tip seal 43.

Therefore, also in this case, the same visual identification as in the first embodiment is possible, and if the chip seals having different lengths are prepared as a group, they can be assembled at the time of assembling the scroll fluid machine. The operation can be facilitated, and the replacement operation can be easily performed when the tip seal is replaced.

FIG. 4C is an explanatory view showing a third embodiment of the tip seal shape. The difference from the first and second embodiments is that the lengths of the tip seals are different in the first and second embodiments, whereas the material of each tip seal is different in the third embodiment. The point is that they are configured with different colors.
That is, the orbiting scroll chip seal, which has a higher pressure than that of the former compression unit, has a rear compression unit tip seal 44A in red, the front compression unit tip seal 44B in yellow, and a fixed scroll tip seal longer than these is one chip seal 46. As configured in blue.

Therefore, also in this case, it is possible to visually identify the same as in the first embodiment, and if the chip seals having different material colors are prepared as a group, the scroll fluid machine can be assembled at the time of assembly. The operation can be facilitated, and the replacement operation can be easily performed when the tip seal is replaced.

FIG. 4D shows a fourth embodiment of the tip seal shape.
It is explanatory drawing which shows the form. Second and third embodiments
The difference is that the second and third embodiments are chip seals.
While the length or the material color was made different,
The tip seal corresponding to the width of the tip seal groove on the wrap.
This is the difference in width. That is, the orbiting scroll
Upward compression, which is higher pressure than the upstream compression section
Thickness t of the tip seal 54A₁Against
Thickness t of compression tip seal 54B₂Thin and change
And one fixed scroll tip seal longer than these
Thickness t of 47 ₃The front compression tip seal 54B
Thickness t₂Made thinner.

The tip seal 47 may have the same width as that of the other tip seals or a width larger than that. Also,
The tip seal thickness may be different from the tip seal groove bottom direction. Therefore, also in this case, it is possible to visually identify, and if the tip seals with different thicknesses are prepared as a group, the operation at the time of assembling the scroll fluid machine will be facilitated, and the replacement operation at the time of tip seal replacement Can be done easily.

FIG. 4E is an explanatory view showing a fifth embodiment of the tip seal shape. In the present embodiment, the identification means is provided by providing a shape such as a protrusion shown by 64A and 48 or a concave portion shown by 64B by partially changing the shape in the tip seal width direction corresponding to the width of the tip seal groove of the wrap. Is. In the tip seal groove of the wrap to which the tip seal is applied, a portion corresponding to the partial shape is formed as a concave portion corresponding to the protrusion and as a protrusion corresponding to the concave portion.

Therefore, in this case, it is possible to visually identify. In the present embodiment, the end portion of the tip seal has a different partial shape, but the end portion may be located at any position without being particular about the end portion. Further, the partial shape may have different recesses or protrusions in the bottom direction of the chip seal groove.

According to this embodiment, the partial shape in the groove width direction or the groove bottom direction of the scroll wrap with which the tip seal is engaged is made different, and the partial shape is related to the groove corresponding portion of the scroll wrap. By forming the matching shape as the identification means, the tip seal identification means is engaged with the shape provided in the groove of the scroll wrap, so that the tip seal expands due to the temperature rise during the compression operation of the scroll fluid machine. As a result, it is possible to prevent the orbiting scroll wrap from becoming a load during orbiting, and to prevent the compressed fluid from leaking out of the tip seal groove.

As described above in detail, according to the first to fifth embodiments, the shape of the tip seal type is the length, the material color, the width direction or the groove bottom direction thickness, and the width direction or the groove bottom direction. The different shapes make it possible to recognize visually or tactilely, facilitating the operation at the time of assembling the scroll fluid machine and the replacement operation at the time of tip seal replacement. it can.

In the present embodiment, the shape of the tip seal is different in length, material color, thickness in the width direction or groove bottom direction, and partial shape in the width direction or groove bottom direction. Of course, one of these may be combined with the other.

[0045]

As described above, since the present invention is formed by providing the identification means for identifying each of the plurality of tip seal types, the tip is used both when the scroll fluid machine is assembled and when the tip seal is replaced. Since the chip seal dedicated to the place, which fits in the seal groove, can be easily recognized and fitted, both assembly and replacement are easy and erroneous assembly and erroneous replacement can be prevented.

[Brief description of drawings]

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

FIG. 2 is a perspective view of a fixed scroll housing.

FIG. 3 is a perspective view of an orbiting scroll.

FIG. 4 is an explanatory diagram showing a shape of a tip seal.

[Explanation of symbols]

1 Scroll fluid machine body 2 Fixed scroll housing 3 Drive shaft housing 11 orbiting scroll

Claims (4)

[Claims] 1. A scroll fluid machine in which a tip seal groove is provided at a tip of a wrap of a fixed scroll and an orbiting scroll, a tip seal is fitted in the groove, and a sealed space is formed by rubbing against a sliding surface of the opposite side. A scroll fluid machine characterized in that when there are a plurality of types of chip seals fitted in the respective chip seal grooves, an identification means for identifying the plurality of types of chip seals is provided on the chip seals. 2. The length of the tip seal or the material color of the tip seal is changed for each tip seal to form a grouping as the identification means, and at least one of the tip seal types can be identified. The scroll fluid machine according to claim 1. 3. The identification means is grouped by making different thicknesses or partial shapes of the tip seals in a width direction or a groove bottom direction of the tip seals for each tip seal type, and at least the tip seal types. The scroll fluid machine according to claim 1, wherein one of the scroll fluid machines is configured to be distinguishable. 4. The chip seal groove wall surface or groove bottom surface is provided with a partially different concave-convex shape, and a portion corresponding to the concave-convex shape of the chip seal is formed with a shape that engages with the concave-convex shape, and the identification is performed. The scroll fluid machine according to claim 1, wherein the scroll fluid machine is a means.