JPH0413361Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a scroll type fluid machine.

[Conventional technology]

For example, in a scroll compressor, the fifth
As shown in the figure, one of two spiral bodies 2 of the same shape is fixed to a seal end plate having a discharge port 4 approximately in the center, and both are rotated 180 degrees relative to each other. So that the bodies touch each other at four points 51, 52 and 51', 52',
They are stacked on top of each other with a relative shift of distance 2ρ (= pitch of the whirlpool - 2 x thickness of the whirlpool), one of the whirlpool bodies 2 is stationary, and the other whirlpool body 1 is
is configured to revolve around the center O of one spiral body 2 with a radius ρ=OO without rotating on its own axis using a crank mechanism having a crank radius ρ.

Then, between the two spiral bodies 1 and 2,
Points 51, 52 and 5 where both spiral bodies abut
Closed small chambers 3, 3 are formed between 1' and 52', and the volumes of the closed chambers 3, 3 gradually change as the spiral body 1 revolves.

That is, if the spiral body 1 is first revolved by 90 degrees from the state shown in FIG. 1, it will become shown in FIG. 2, if it is revolved by 180 degrees, it will become shown in FIG. gradually decreases, and in Figure 4, the two chambers 3 and 3 communicate to form a chamber 53.When the state in Figure 4 is further revolved by 90 degrees, it becomes Figure 1, and the volume of the chamber 53 is as follows from Figure 2. The volume decreases to Figure 3, and becomes the minimum volume between Figure 3 and Figure 4, and during this time, the outer space that began to open in Figure 2 changes from Figure 3 and Figure 4 to Figure 1. Then, new gas is taken in to form a closed chamber, and this process is repeated thereafter, and the gas taken in from the spiral body outer space is compressed and discharged from the discharge port 4.

The above is the operating principle of a scroll type compressor. Specifically, as shown in the longitudinal cross-sectional view of FIG.
It consists of a cylinder plate 13, has an inlet 14 and an outlet 15 protruding from the rear end plate 12, fixes a stationary scroll member 25 consisting of a spiral body 252 and a disc 251, and attaches a crank pin to the front end plate 11. 23 is pivotally connected to the crank pin 23, and a seventh
As shown in the cross-sectional view, the radial needle bearing 26 and the boss 24 of the revolving scroll member 24
3. A revolving scroll member 24 comprising a spiral body 242 and a disc 241 is attached via a revolving mechanism comprising a square tube member 271, a sliding member 291, a ring member 292, a rotation stopper 293, etc.

Here, the flange body 27 is provided with a square tube part 271 which is keyed to the boss 243 and prevents mutual rotation when it is fitted into the boss 243. The axial length of the scroll member 24 is greater than or equal to the axial length of the boss 243 of the scroll member 24, so that the thrust load applied to the revolving school member 24 is supported by the rotor 21 via the thrust needle bearing 28.

However, in this type of compressor, when compressing gas by meshing the spiral body of the revolving scroll member and the spiral body of the stationary scroll member,
It is important to axially support the revolving scroll member by accurately abutting the tip of the spiral body with the end plate surface to prevent gas leakage, but this is not easy due to the thrust load caused by gas pressure.

[Problem that the invention attempts to solve]

The present invention was proposed in view of these circumstances, and it eliminates gas leakage between the tip of the spiral body and the end plate surface, and also eliminates the thrust of the revolving scroll member, thereby creating a compact, lightweight, and high-performance device. The purpose is to provide a scroll type fluid machine.

[Means for solving problems]

To this end, the present invention provides a pair of front and rear stationary scroll members that are disposed oppositely so that spiral bodies protruding from opposing surfaces of end plates engage with each other with an appropriate gap, and a space between the two stationary scroll members. A revolving scroll member whose spiral body is engaged between the spiral bodies of the stationary scroll member, and a non-rotating rotation mechanism that causes the revolving scroll member to revolve around the stationary scroll member without rotating. It is characterized by

[Effect]

With this configuration, the thrust caused by the compressed gas acting on the front and rear surfaces of the revolving scroll member is offset,
By eliminating gas leakage between the tip of the spiral body and the end plate surface, the thrust of the revolving scroll member can be eliminated, and a small, lightweight, and high-performance scroll-type fluid machine can be obtained.

〔Example〕

An embodiment of the present invention will be explained with reference to the drawings.
Fig. 1 is a front view showing the spiral bodies of the revolving scroll member and the stationary scroll member, Fig. 2 is a longitudinal sectional view of Fig. 1, and Fig. 3 is a front view and a vertical sectional view showing the revolving scroll of Fig. 2. 4 is a longitudinal sectional view showing the non-rotating rotation mechanism of the revolving scroll member relative to the stationary scroll member in FIG. 2.

First, in FIGS. 1 to 3, a spiral body 250 shown by a solid line and a spiral body 250' shown by a broken line are a pair of front and rear stationary scroll members having the same shape and whose phases are shifted by 180 degrees from each other.

Revolutionary scroll member 100 formed of a plate-shaped body
consists of a spiral body formed by spiral curves a and b formed by the front and back surfaces of the plate, and is pivotally supported by meshing with the spiral bodies 250, 250' of the stationary scroll member.The spiral body 250 of the stationary scroll member follows the spiral curve of the revolving scroll member. b and the spiral body 250' of the stationary scroll member mesh with the spiral curve a of the revolving scroll member 100 with gaps in the axial and radial directions, respectively, to constitute a scroll compressor.

The front side of the revolving scroll member 100 has a thick spiral body formed by a curved surface b, and the back side has a spiral body of the same shape formed by a curved line a.

400, 400' are stationary scroll members 200,
A discharge port is provided at the center of each of the holes 200'.

Next, as shown in FIG.
It is assembled so as to revolve around the stationary scroll members 200, 200' without rotating on its axis via the Oldham mechanism described in No. 32659.

That is, 100a and 100a' are a pair of left and right radial keyways provided in the revolving scroll member 100, and 200a and 200a' are a pair of left and right tangential keyways provided in the stationary scroll members 200 and 200'. direction keyway 100a, 10
0a' and the tangential grooves 200, 200a' are orthogonal to each other, and the cross keys 600, 6 are located at this orthogonal part.
00' are respectively slidably inserted.

500 is a rotating shaft having an eccentric pin 510, which is supported by a bearing 500a of the stationary scroll member 200, and the eccentric pin 510 is slidably fitted into an eccentric pin bearing 510a recessed in the revolving scroll member 100.

In such a structure, when the rotating shaft 500 rotates, the eccentric pin 510 thereof performs an eccentric movement, so that the revolving scroll member 100 moves along the cross key 60.
By 0,600', the stationary scroll member 200,
200' in the tangential direction and radial direction to perform a revolution movement without rotating on its own axis relative to both stationary scroll members, and at this time, the revolution scroll member 1
Gas compression is performed simultaneously on the front and back sides of 00.
Therefore, the thrust load on the revolving scroll member due to gas compression is offset.

In addition, as the thrust load of the revolving scroll member is offset, the thrust bearing is no longer necessary.
As the bearing becomes smaller and lighter, gas leakage between both scroll members is also greatly reduced.

[Effect of idea]

In short, according to the present invention, a pair of front and rear stationary scroll members are disposed opposite each other so that the spiral bodies protruding from the opposing surfaces of the end plates mesh with each other with an appropriate gap, and a space between the two stationary scroll members. a revolving scroll member in which a spiral body provided in the stationary scroll member is engaged between the spiral bodies of the stationary scroll member; and a non-rotating rotation mechanism that causes the revolving scroll member to revolve around the stationary scroll member without rotating. As a result, gas leakage between the tip of the spiral body and the end plate surface is eliminated, and the thrust of the revolving scroll member is eliminated, thereby obtaining a small, lightweight, and high-performance scroll-type fluid machine. Above all, it is extremely useful.

[Brief explanation of drawings]

Fig. 1 is a front view showing a spiral of a scroll member according to an embodiment of the present invention, Fig. 2 is a vertical sectional view of Fig. 1, and Fig. 3 is a front view and a vertical sectional view showing the revolving scroll of Fig. 2. FIG. 4 is a vertical cross-sectional view showing the non-rotating rotating mechanism of the revolving scroll member relative to the stationary scroll member in FIG. 2. Fig. 5 is an explanatory diagram of the principle of a known scroll type compressor; Fig. 6 is a vertical sectional view of a known scroll type compressor;
The figure is a cross-sectional view taken along - in FIG. 6. 100...Revolving scroll member, 100a, 1
00a'...Radial keyway, 200, 200'...
...stationary scroll member, 200, 200a'... tangential keyway, 250, 250'... spiral body,
400, 400'...discharge port, 500...rotation shaft,
510... Eccentric pin, 600, 600'... Cross key, a, b... Spiral curve.

Claims (1)

[Scope of utility model registration request] A pair of front and rear stationary scroll members are arranged opposite to each other so that the spiral bodies protruding from opposite surfaces of the end plates engage with each other with an appropriate gap, and the spiral bodies provided between the two stationary scroll members are A scroll type characterized by comprising a revolving school member meshed between the spiral bodies of a stationary scroll member, and a non-rotating turning mechanism that causes the revolving scroll member to revolve around the stationary scroll member without rotating on its axis. Fluid machinery.