JPS58101284A - Scroll type fluid machinery - Google Patents

Abstract

PURPOSE:To shorten the length in the axial direction and maintain a sufficient area for supporting the thrust load of a scroll member and reduce the working time. CONSTITUTION:A revolution scroll member 240 is locked with a front end plate 110 by the grooves 551 and 552 on a turning ring 55 which cross each other, and rotation is prevented. However, a revolution scroll member 240 can be revolved in the vertical direction through the relative movement between the groove 552 on the turning ring 55 and the projecting stripes 249 on the disk 241 of the scroll member 240, and the turning ring 55 can be moved. Therefore, the revolution scroll member 240 can move also in the direction perpendicular to this paper surface, and the revolution scroll member 240 can be turned by one component of the turning ring 55, and thus reduction of dimension and cost cut are enabled. As the grooves 551 and 552 or the direction of projecting stripes 111 do not pass through the center axis of the member, the rapid working method in use of planers etc. can be adopted.

Description

[Detailed description of the invention] The present invention relates to a scroll type fluid machine.

For example, in a known compressor of this kind, as shown in FIG. 1, which shows the principle of operation, 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 the other The spiral body l is fixed to the other end plate, and both are rotated 180 degrees relative to each other as shown in the same figure, and both are rotated by 5
1. Lay both spiral bodies on top of each other with a relative shift of a distance of 2ρ (= pitch of the spiral - 2 × thickness of the spiral) so that they touch each other at four points, 52, 51', and 52', and The spiral body 2 is kept stationary, and the other spiral body l is made to revolve around the center 00 of one spiral body 2 with a radius ρ = 00' without rotating on its own axis using a crank mechanism having a crank radius ρ. 0 Then, between the two spiral bodies 1 and 2, there are points 51, 52 and 51' where they come into contact.

A sealed small chamber 3.3 is formed between 52' and the volume of the closed chamber 3.3 gradually changes as the spiral body l revolves. First 9
When it revolves at 0 degrees, it becomes (2) in the same figure, when it revolves at 180 degrees, it becomes (3) in the same figure, and when it revolves at 270 degrees, it becomes (4) in the same figure.
During this period, the volume of small chamber 3 gradually decreases, as shown in the figure (
In 4), the two chambers 3.3 are connected to form the chamber 53,
If the state of the figure (4) is further revolved by 90 degrees, the figure (1)
) The volume of the small chamber 53 is as shown in figure (2) and figure (3).
The volume decreases to the minimum volume between (3) and (4) in the same figure, and during this time, the outer space that started to open in (2) in the same figure becomes (3) in the same figure and (4) in the same figure. Moving from (4) to (1) in the same figure, 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 outside space is compressed, and the gas is drawn in through the discharge port 4. It is discharged.

The above is the operating principle of a scroll type compressor. Specifically, as shown in the vertical cross-sectional view of Fig. 2, the scroll type compressor has a
．． ! l End plate 12. cylinder plate) 13, an intake port 14 and a discharge port 1 on the rear end plate 12.
When 5 is provided protrudingly, the spiral body 252 and the disc 2
A main shaft 17 having a crank pin 23 is pivotally connected to the stationary scroll member 25t (fixed to the front end play) 11, and a radial needle bearing is attached to the crank pin 23, as shown in the cross-sectional view of FIG. 26. Post 243 of the revolving scroll member 24. Square tube member 271. Sliding body 291. A revolving scroll member 24 comprising a spiral body 242 and a disk 241 is attached via a revolving mechanism comprising a ring member 2929, a rotation stopper 293, and the like.

In the past, various structures have been proposed for the revolution mechanism, and the one shown in FIGS. 2 and 3 is one example. Thrust needle bearing 22.7 lange body 27. Sliding body 291. There are many ring members 292, and the machined surface is also a flat cylinder with 9 cylinders.

Because of the complicated grooves, it is not possible to shorten the length A in the main axis direction in order to make each of these members perform their functions, and since the rotor 21 is required, the axial length B is required, and the total length is Cannot be downsized.

In addition, as another structure, a revolving scroll consisting of a plurality of poles and their retainers fitted between a dish-shaped groove carved in the scroll member and a dish-shaped groove carved in the housing side member A prevention mechanism is also known, but with such a structure, it takes time and effort to process the dish-shaped groove, and since the pole rolls, the dish-shaped groove will wear out if the mating member has low hardness. Measures must be taken to prevent wear, and because a large number of poles are used, ease of assembly is poor.

A method using a driven crank has also been proposed, but since the crank is installed on the outer periphery of the scroll member in this structure, the diameter becomes large, and the thrust load of the scroll member must be supported by another member. No.

Furthermore, there is a device in which grooves or protrusions are provided in the radial direction, and protrusions or grooves that fit into the grooves are provided on the housing side member and the scroll member, so that rotation is prohibited and only revolution is performed.
In such a structure, since the grooves are provided in the radial direction, end milling etc. are inefficient, and it is difficult to increase the width of the annular body, so it is difficult to receive thrust loads.

The present invention was proposed in view of the above circumstances, and is a scroll-type fluid that reduces the length in the axial direction as much as possible, secures a sufficient area to support the thrust load of the scroll member, and reduces machining time. In a scroll-type rotating machine, in which a revolving scroll member is caused to revolve relative to a fixed scroll member via an orbiting ring by eccentric rotation of a crank pin, the shaft center is sandwiched between the front end plate and When it is slidably guided in the lateral direction via the extending parallel ridges and parallel grooves, it is also guided through the parallel ridges and parallel grooves that extend across the axis relative to the horizontally revolving scroll member, and is guided in a direction perpendicular to the lateral direction. An embodiment of the present invention, characterized in that it is equipped with a swivel ring that is slidably guided in the direction, will be described with reference to the drawings. FIG. 4 is a longitudinal cross-sectional view thereof, and FIG. - cross-sectional view along ■;
6 is a sectional view of the swivel ring along Vl-Vl in FIG. 5, and FIG. 78.9 is a partial longitudinal sectional view showing a modification of the sliding structure of the swivel ring shown in FIG. 4, respectively. ◇In the above figure, the same symbols as in Figs. 2 and 3 indicate the same members as in Figs. It is a substantially square turning ring, and a parallel groove 551 is carved on the left side to slidably fit into the protrusion 111 of the front end plate 110, and a circular plate of the revolving scroll member 240 is carved on the right side. A parallel groove 552 is cut into the protrusion 249 of 241 so as to be slidably fitted therein.The parallel grooves 551 and 552 are cut into the swing ring 55 so as to be perpendicular to each other. play) 1
A pair of parallel protrusions protruding from the inner surface of the scroll member 10 in a parallel arc shape sandwiching the axis; 249 is the disk 2 of the revolving scroll member 240;
Parallel protrusions Ill are provided in a parallel arc shape to sandwich the axis at 41.
There are l pairs of parallel ridges perpendicular to .

In such a device, mutually orthogonal grooves 551,55
2, the revolving scroll member 240 is restrained from rotating because it is locked to the front plate 110, but as shown in FIG. 4, the disk 241 of the scroll member 240 The revolving scroll member 240 is movable due to the relative movement between the protrusion 249 of and the groove 552 of the orbiting ring 55, and in the direction perpendicular to the plane of the paper, the protrusion Ill of the front end plate 11 and the orbiting ring 55
Since the rotating ring 55 can move by relative movement with the groove 551, the scroll member 240 can eventually move in a direction perpendicular to the plane of the paper. Therefore, the orbiting scroll member 2401d performs an orbital movement due to the eccentric rotation of the crank pin 23 due to the rotation of the main shaft 17, but does not perform an autorotation movement.
A so-called pivoting movement can be performed.

According to such a device, the following effects can be achieved.

(1) The orbiting motion of the revolving scroll can be performed by a single component of the orbiting ring.

(2) Since the direction of the groove or protrusion does not pass through the central axis of the member, a quick processing method using a planer or the like can be employed, especially in cases where there is a boss body in the center.

(3) Since the length of the groove or protrusion can be increased,
It can have the function of a thrust bearing that receives thrust force applied to the revolving scroll member.

Note that the engagement structure between the front end plate and the turning ring may be as shown in FIGS. 7 to 9.

FIG. 7 shows an example in which the relationship between the concave and convex portions is reversed from that of the above embodiment, and the front end plate 110 is provided with a groove, and the swivel ring 55 is provided with a protrusion, and the convex shape is a trapezoid, a circle, etc. You can also.

FIG. 8 shows an example in which they are engaged via an intermediate member 66, where the intermediate member 66 is a rod and the front end play) 110. The intermediate member 66 and the pivot ring 55 are made to slide relative to each other,
If the front end play) 110 and the swivel ring 55 are made of aluminum alloy with 9% of the same metal, the intermediate member 66
It is recommended to provide needle bearing rollers as a countermeasure. Note that one of the grooves must be closed at the end to prevent the roller from coming off. Front end plate 110. If the surface of the swivel ring 550 has sufficient hardness, the intermediate body 6
It is also possible to arrange rolling elements 6 such as balls for ball bearings or cylindrical rollers for cylindrical roller bearings so as to roll in the moving direction.

FIG. 9 shows an attempt to expand the thrust load receiving area and reduce the number of machined surfaces by restricting the grooves to only two surfaces.

In short, according to the present invention, in a scroll-type rotating machine in which a revolving scroll member is caused to revolve relative to a fixed scroll member via an orbiting ring by eccentric rotation of a crank pin, the axis is centered relative to the front end plate. When it is slidably guided in the lateral direction via the parallel protrusions and parallel grooves that extend between them, it also moves in the lateral direction via the parallel protrusions and parallel grooves that extend between the axis of the revolving scroll member. The present invention is of great industrial interest because by providing a pivot ring that is slidably guided in the orthogonal direction, a small, high-performance, low-cost scroll-type rotary machine is obtained.

[Brief explanation of the drawing]

Fig. 1 is a principle diagram of a scroll compressor, Fig. 2 is a vertical cross-sectional view of a known scroll compressor, and Fig. 3 is the -
4 is a longitudinal sectional view showing an embodiment of the present invention, 1 and 5 are lateral sectional views taken along 2--2 in FIG. Cross-sectional view of the single ring along Vl-Vl in Figure 7. 8. 9 is a partial vertical sectional view showing a modification of the sliding structure of the swivel ring shown in FIG. 4. FIG. 10...Housing, 110...Front end plate, Ill...Parallel protrusions, 12...Rear end plate, 13...Cylinder plate, 14...Intake port, 15...
・Discharge port, 17...Main shaft, 23...Crankbin, 24
0...Revolving scroll member, 241...Disk, 242...
- Spiral body, 243... Boss, 249... Parallel protruding body, 25... Stationary scroll member, 251... Disc, 25
2. Spiral body, 26. Radial needle bearing, 55. Swivel ring, 551. Parallel groove, 552. Parallel groove, 553. Hole, 66. Intermediate member, Sub-Agent Tadashi Tsukamoto, Patent Attorney Sentence

Claims (1)

[Claims] In a scroll-type rotating machine in which a revolving scroll member is caused to revolve relative to a fixed scroll member via an orbiting ring by eccentric rotation of a crank pin, parallel protrusions and parallel grooves that extend across the axis of the front end plate are used. When it is slidably guided in the lateral direction through the revolving scroll member, it is also slidably guided in a direction perpendicular to the lateral direction via parallel protrusions and parallel grooves that extend across the axis of the revolving scroll member. A scroll-type fluid machine characterized by being equipped with a rotating ring.