JPH01380A - scroll wing - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial Field of Application) The present invention relates to a scroll quality constructed by inserting a spiral scroll groove/tube into a scroll groove of an end plate. 2. Description of the Related Art Conventionally, as a scroll material for a frame 17-hole complex, one in which an end plate and a spiral frame 17-le wrap are integrally formed by casting is known.

This scroll quality requires cutting of the mounting surface, sliding surface, etc. in order to improve accuracy, which poses the problem of extremely difficult machining and high cost.

Therefore, as a solution to this problem, we came up with a scroll blade in which an end plate with an involute curved scroll groove and an involute curved scroll wrap are formed separately, and the scroll wrap is press-fitted into the scroll groove. It was issued.

By forming the end plate and the scroll wrap separately in this way, the end plate and the scroll groove/tube can be easily processed.

(The problem to be solved by the invention) However, in the conventional technology, in order to reduce the sealing effect between the scroll groove and the scroll wrap, a method has been adopted in which the scroll wrap is press-fitted into the scroll groove.
In this method, the scroll grooves and scroll wraps must be machined with high precision, and the processing costs are high, making it impossible to reduce costs. Moreover, even if the scroll grooves and scroll wraps are machined with precision, as shown in Fig. 8,
As shown in FIG. 9, a partial gap 105 is generated between the scroll groove 103 formed in the end plate 101 and the scroll wrap 102, so that compressed gas leaks from the gap 105 during operation of the scroll compressor, causing the volume to increase. There is a problem that efficiency decreases.

Moreover, since the end plate 101 and the scroll wrap 102 are made of different materials, a difference in thermal expansion occurs between the end plate 101 and the scroll wrap 102 due to heat generated by compression or the like. Due to this difference in thermal expansion, if the coefficient of thermal expansion of the scroll lamp 102 is smaller than that of the end plate 101, a gap 105 will occur between the scroll wrap 102 and the end plate 101, and if it is larger, the scroll wrap 102 will stretch and fall. As a result, a gap 105 is generated at this collapsed location, and compressed gas is likely to leak out from these gaps 105. Therefore, if a gap is provided in advance between the scroll wrap 102 and the chain plate 101 to prevent the scroll wrap 102 from falling down, compressed gas will leak from this gap at the beginning of operation, causing compression loss.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a single-foil blade that can improve the volumetric efficiency by increasing the sealing effect between the scroll groove and the scroll wrap. .

E Structure of the Invention] (Means for Solving the Problems) The present invention provides a scroll blade in which a scroll wrap formed in a scroll spiral shape formed on an end plate is inserted, in which the scroll groove and the scroll wrap are connected to each other. It is characterized by having an elastic body interposed between them.

(Function) With this configuration, by inserting the scroll wrap into the scroll groove with the elastic body attached to the scroll groove or the bottom of the scroll wrap, the elastic body is created between the scroll groove and the scroll wrap. It is possible to seal with the body, and the elastic body can absorb problems such as machining accuracy and thermal deformation of the scroll groove and scroll wrap, so it is possible to improve the sealing effect between the scroll groove and the scroll wrap. can.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 shows an orbiting scroll blade to which the present invention is applied to, for example, a scroll compressor.

This orbiting scroll blade is formed by separately forming an end plate 1 and an involute curved scroll wrap 2, and an involute curved scroll groove 3 is formed on one surface of the end plate 1.

When inserting the scroll wrap 2 into the scroll groove 3,
First, an elastic body 4 made of a low elastic material such as elastic rubber or urethane foam is attached to the scroll wrap 2 side or the scroll groove 3 side. In this embodiment, the elastic body 4 is formed into a belt shape with a U-shaped cross section as shown in FIG. By inserting the third
A fixed scroll blade can also be obtained in the same manner as in 6, in which the orbiting scroll blade shown in the figure is obtained.

By interlocking the fixed scroll blades and the orbiting scroll blades configured in this manner, a scroll wall fluid R machine having a compression function is constructed. In this scroll-type fluid machine, by rotating the orbiting scroll blades relative to the fixed scroll blades, the compression chamber formed by both scroll blades gradually decreases toward the center, and the outer periphery of both scroll luffs 2.2 The fluid sucked in is compressed and discharged from the discharge boat in the center.6 Therefore, according to such a configuration, as shown in FIGS. 4 and 5, the fluid between the scroll wrap 2 and the scroll groove 3 is The elastic body 4 can seal the seal, and the end plate 1 and the scroll wrap 2 can be sealed due to the difference in thermal expansion coefficient.
The elastic body 4 absorbs thermal deformation in the direction of arrow It is possible to enhance the sealing effect with the groove 3, prevent gas leakage from the compression chamber, and improve volumetric efficiency.

In addition, in scroll compressors, blind JJI:
Because the scroll wrap 2 thermally expands in the blindness direction (direction of arrow Y in Figure 2) at the center of the area under the influence of heat, the blindness of the scroll wrap 2 gradually increases toward the center. Become. However, since the conventional scroll X cannot absorb thermal deformation in the blindness direction, there is a problem in that the sealing effect in the height direction is significantly impaired. On the other hand, according to the configuration of this embodiment, the thermal deformation of the scroll wrap 2 in the height direction is absorbed by the elastic body 4, and both the scroll wraps 2゜2 of the fixed scroll blade and the orbiting scroll blade are connected to the mirror plate of the other side. 1. Since it can be pressed uniformly to 1,
The sealing effect between the fixed scroll blade and the orbiting scroll blade can be enhanced. Moreover, since the scroll wrap 2 can be brought into pressure contact with the mating end plate 1 by the elastic force of the elastic body 4, the sealing effect can be sufficiently enhanced even at the initial stage of compression operation.

Furthermore, when the side surface of the scroll lamp 2 is supported by the elastic body 4, when the orbiting scroll rotates relative to the fixed scroll, both scroll wraps 2, 2 are pressed against each other by the elastic force of the elastic body 4.4. , both the scroll wraps 2, 2 are in good contact with each other, and the sealing effect can be enhanced.

As a result of the above, according to the configuration of this embodiment, the sealing effect between the fixed scroll blade and the orbiting scroll groove can be reduced, so that the volumetric efficiency can be further improved compared to the conventional one. be able to.

Next, another embodiment of the present invention will be described using FIG. 6 or FIG. 7.

The second embodiment shown in FIG. 6 has a structure in which the scroll groove 13 formed in the end plate 11 and the inside of the scroll wrap 12 are formed almost identically, and the scroll wrap 12 is press-fitted into the scroll groove 13. An elastic body 14 is interposed between the bottom surface of the scroll wrap 12 and the scroll groove 13.

The third embodiment shown in FIG. 7 has a V4 type in which the scroll wrap 22 is press-fitted into the scroll groove 23 in the same way as in FIG. An elastic body 24 having a U-shaped cross section, which is the same as 22, is fitted therein.

In the second or third embodiment described above, consideration was given to forming the end plate 11.21 and the scroll wrap 12.22 from materials with substantially the same coefficient of fat expansion so as to eliminate the difference in thermal expansion between the two. ing.

Therefore, according to the configuration of the second embodiment or the third embodiment, the scroll wrap 12.22 and the scroll groove 13,
23 can be sealed by the elastic body 14.24, increasing the sealing effect between the scroll wrap 12.22 and the scroll grooves 13, 23, preventing gas leakage from the compression chamber, and improving volumetric efficiency. can be done. Moreover, by interposing the elastic body 14.24 between the bottom surface of the scroll wrap 12.22 and the scroll groove 13.23, the scroll wrap
The thermal deformation in the height direction of 2.22 can be absorbed by the elastic body 14.24, and the elastic body 14.2
Since the scroll wraps 12, 22 can be brought into pressure contact with the opposing end plate 11° 21 by the elastic force of 4, the sealing effect between the fixed scroll blades and the orbiting scroll blades can be enhanced.

Note that the present invention is not limited to the above embodiments,
Various modifications can be made without changing the gist.

For example, in the above embodiment, elastic bodies were interposed corresponding to three sides of both side surfaces and the bottom surface of the scroll wrap, or one of the bottom surfaces. An elastic body can also be interposed to correspond to the surface.

Further, in the present invention, the scroll groove can be formed to be long in the outer circumferential direction in the scroll wrap, so that thermal deformation in the longitudinal direction of the scroll lamp can be absorbed.

[Effects of the Invention] According to the present invention, it is possible to provide a scroll blade that can improve volumetric efficiency by eliminating the sealing effect between the scroll groove and the scroll wrap.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing the schematic structure of an embodiment of the present invention, FIG. 2 is a sectional view showing the schematic structure of a scroll blade made according to the same embodiment, and FIG. 3 is an exploded perspective view showing the schematic structure of an embodiment of the present invention. A perspective view showing an example; FIG. 4 is a plan view showing an enlarged main part of the example;
5 is a sectional view taken along the line A-A in FIG. 4, FIG. 6 or 714 is a sectional view showing other different embodiments of the present invention, and FIG. 8 is a main part of a conventional scroll blade Figure 9 is a cross section 1 taken along line B-B in Figure 8.
It is 2J. 1.11.21... End plate 2.12.22... Scroll wrap 3.13.23
...Scroll lecture 4.14.24...Elastic body 22a...Protrusion Fig. 1 Fig. 2 Fig. 3 Cause Fig. 4 Fig. 5 Fig. 7 Fig. 8 Fig. 9

Claims (2)

[Claims] (1) A scroll blade comprising a spiral scroll wrap inserted into a scroll groove formed in an end plate, characterized in that an elastic body is interposed between the scroll groove and the scroll wrap. . (2) The scroll blade according to claim 1, wherein the elastic body is made of a low elastic material such as rubber or urethane foam.