JPH01130081A - Scroll compressor - Google Patents

Abstract

PURPOSE:To prevent a movable scroll from going up in temperature because of frictional heat by forming an oil guide section in the radial direction on the lower surface of the movable scroll, and concurrently arranging a scroll side thrust plate between the lower surface of said movable scroll and the thrust plate. CONSTITUTION:A thrust support device 13 lets a groove 26 be recessed on the lower surface of the end plate 11 of a movable scroll 9 as an oil guide section, and concurrently lets a scroll side thrust plate 28 be arranged between the lower surface of the movable scroll 9 and a thrust plate 27. The scroll side thrust plate 28 is entrained with the movable scroll 9 with no sliding accompanied, but is slidible to the thrust plate 27 on the lower side.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a scroll compressor in which a thrust plate is interposed between a movable scroll and a fixed frame for supporting the movable scroll.

(b) Prior art JP-A No. 60-2069995, which precedes the present invention! In the conventional scroll compressor described in the R publication, as shown in Fig. 4, a movable scroll is mounted on one thrust plate (b) on a fixed frame (a). 1, the movable scroll (C) generates sliding frictional heat with the thrust plate (B), and the end plate () is placed on the horizontal axis in FIG. Radial distance, vertical axis 1
As shown by taking the temperature at the CA-A line, the temperature rises to 150℃ or more at the sliding contact area with the front ε thrust plate (b), and the temperature between this sliding contact area and the low temperature area is large. There is a disadvantage that thermal distortion occurs due to the difference, and furthermore, abnormal wear and seizure damage occur.

(c) Problems to be Solved by the Invention The present invention solves the above-mentioned drawbacks and suppresses the temperature rise due to frictional heat of the movable scroll.

B) Means for Solving the Problems The present invention provides a fixed gradient scroll in which a first spiral body is provided on the end plate, and a second spiral body that engages with the first spiral body. A movable scroll provided on an end plate, a fixed frame that supports the movable scroll via a thrust plate roller, and an electric element that gradually compresses the suction refrigerant between the front ε movable flows and moves it from the outside toward the center. A radial oil guide portion is formed on the lower surface of the movable scroll, and a scroll-side thrust plate is interposed between the lower surface of the movable scroll and the thrust plate. .

(e) Function According to the present invention, since the movable scroll carries the scroll-side thrust plate, sliding friction occurs between the scroll-side thrust plate and the thrust plate below it, and therefore the movable scroll itself has sliding friction. Generates almost no heat. The heat that is about to be transferred to the movable scroll via the scroll-side thrust plate is
The oil is carried away by the circulating oil in the oil guide section interposed between the open members, and only a portion of the oil is transmitted to the movable scroll. Furthermore, when the movable scroll revolves, the centrifugal force causes lubricating oil in the crank portion to be continuously supplied to the radial oil guide portions.

(Example of punishment Next, one embodiment of the present invention will be described.

In FIG. 1, reference numeral (1) denotes a closed container in which an upper compression element (2) and a lower electric element (3) are housed.

A fixed frame (4) constitutes a part of the compression element (2), and is fixed to the inner wall of the closed container (1).

(5) is a fixed scroll attached to a fixed frame (4), which forms a first spiral body (7) in an involute curve form in the center of a disc-shaped end plate (6), and has a skirt at the outer peripheral end. It forms part (8). (9) is a movable scroll arranged opposite to the fixed scroll (5), and the front ε
A second spiral body Q1 that faces and meshes with the first spiral body (7) is formed on the end plate u11. Second spiral body α
O is formed in an impoliate curve like the first spiral body (7), and has a concave groove (not shown) on the end surface.
A chip seal (10c) for maintaining airtightness is attached to this concave groove. α2 is the fixed frame (
4) with the Oldham ring fixed to the movable scroll (9).
) to prevent the movable scroll (9) from rotating relative to the fixed scroll (5). αJ
The movable scroll (9) etc. are mounted on the fixed frame (4).
), the details of which will be described later. Alpha is a suction pipe that opens into a space α9 defined by a fixed frame (4) and a fixed scroll (5). space(
The air of No. 10 is taken into the compression chamber (10) formed between the fixed scroll (5) and the movable scroll (9). αη is the discharge port at the center of the compression chamber αe). , the end plate (6) of the fixed scroll (5)
) and the closed container (1).

O9 is a discharge pipe that communicates with the high pressure chamber αη, and is a closed container (1).
It is installed through the.

is a stator that constitutes a part of the electric element (3);
(Company) is a rotor disposed inside the stator (■), and (■) is a rotating shaft fixed to the rotor C11. ■ is a crank part formed at the upper end of the rotating shaft, and the movable scroll (
9) through the boss portion (241VC sliding bearing), and its lubricating oil is supplied from the oil pump (22a).The electric element (3) moves the movable scroll (9) on a circular orbit. By making the orbital movement, gaseous fluid is sucked between the movable scroll (9) and the fixed scroll (5), and this gaseous fluid is transferred to both spiral bodies (
7) As shown in FIGS. 2 and 3, the thrust support device (13) is a hollow space (16a) formed between the end plate (111) of the movable scroll (9). A groove is provided as an oil guide on the lower surface, and between the lower surface of the movable scroll (9) and the thrust plate,
A scroll-side thrust play 4 (support) is provided.

The scroll side thrust plate ■ is the movable scroll (
9) so that it slides against the lower thrust plate without being dragged or sliding.

Furthermore, lubricating oil for the crank unit is continuously supplied to the oil guide groove (2) by flowing out in the radial direction due to rotational centrifugal force of the crank unit.

In the scroll compressor, during compression operation, the fluid flowing into the suction pipe space α is compressed by moving it between the movable scroll (9) that revolves on a circular orbit and the fixed scroll, and then compressed into the compression chamber. Discharge boat in the center of 0e (
11D etc. and further passes through the high pressure chamber Cl71 to the discharge pipe α.
Discharge from the container to the outside of the closed container (1).

Further, in the scroll compressor, the movable scroll (9)
During the revolution, lubricating oil of the crank part is continuously supplied to the radial oil guide part (to) due to the centrifugal force of the movable scroll (9) and the crank part. This lubricating oil prevents the thermal force from being transferred to the scroll-side thrust plate (1), and almost no thermal force is transmitted to the movable scroll (9), so that the movable plate (9) does not become abnormally heated.

(G) Effects of the Invention Since the present invention is configured as described above, by preventing the movable scroll from directly slidingly contacting the thrust plate on the fixed frame, almost no sliding friction heat is generated by the movable scroll itself. In addition, the heat transmitted from the thrust plate to the movable scroll via the scroll-side thrust plate can be blocked by the circulating oil in the oil guide section, and therefore the movable scroll can be protected from thermal distortion, abnormal wear, seizure, etc. Therefore, it is possible to provide a scroll compressor with stable performance without the risk of thermal damage.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a longitudinal sectional view of the main part, and FIG. 3 is a bottom view of the main part. FIG. 4 is a vertical cross-sectional view of a part of the conventional example, and FIG. 5 is an explanatory diagram of the temperature distribution of the conventional example. (3)...Electric element, (4)...Fixed frame%
(5) - Fixed scroll, (6) End plate, (7
)...first spiral body, (9)...movable scroll, αO...second spiral body, ■...end plate,...
Crank part, ■... Oil guide part, Sash... Thrust plate, (Support)... Scroll side thrust plate.

Claims (2)

[Claims] (1) A fixed scroll in which a first spiral body is provided on an end plate, a movable scroll in which an end plate is provided with a second spiral body that faces and engages with the first spiral body, and the movable scroll A fixed frame supporting the above via a thrust plate is connected to the lower part of the movable scroll via a crank section, thereby driving the movable scroll to gradually compress the refrigerant sucked between the spiral bodies to the outside. an electric element for moving the movable scroll toward the center, forming a radial oil guide portion on the lower surface of the movable scroll, and between the lower surface of the movable scroll and the thrust plate; A scroll compressor characterized by having a scroll-side thrust plate installed. (2) The scroll compressor according to claim 1, wherein the oil guide portion is formed in a groove shape.