JPH04334781A - Double-rotation type scroll compressor - Google Patents

Abstract

PURPOSE:To improve sealing quality of a compressive space by installing ring- shaped seal guard at respective end plates of the first and second scrolls, and forming oil holes between the seal guard and a seal ring. CONSTITUTION:Seal rings 73a, 73b are engaged respectively with ring-shaped grooves 65a, 67a in a main frame 65 and an auxiliary frame 67, and on its outside, ring-shaped seal guards 74a, 74b are installed at end plates 56, 61 to form oil through holes 56a, 61a in the end plates 56, 61 between the seal guards 74a, 74b and the seal rings 73a, 73b. Oil in an enclosed container 51 flown in from the oil holes 65a, 67a and leaks from the high pressure side to the low pressure side through a clearance between the seal guards 73a, 73b and the end plates 56, 61, and then gathers in a ring-shaped space between the seal guards 74a, 74b to improve sealing quality between a high pressure chamber and a low pressure chamber. Moreover, a part of the oil flows from the peripheries of the end plates 56, 61 to a compressive space 69, so it is possible to improve the sealing quality of the compressive space.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a double-rotating scroll compressor, and more particularly to a double-rotating scroll compressor used as an air conditioning refrigeration equipment.

0002

2. Description of the Related Art FIG. 4 is the same as FIG. 1 disclosed in ``Scroll Fluid Machinery'' of Japanese Patent Application Laid-open No. 64-24190, and FIG. 4 shows the relationship between a driving scroll 1 and a driven scroll 2. 1 is a vertical cross-sectional view of a scroll fluid machine in which oil 43 in an upper housing 8 is introduced into a compression chamber 3 located between the two through oil passages 40 and 41 to improve the sealing performance of the compression chamber 3; Scroll fluid machines are used as vacuum pumps.

0003

[Problems to be Solved by the Invention] FIG. 5 is a longitudinal cross-sectional view of a conventional double-rotating type scroll compressor. When the scroll compressor is used as an air conditioning refrigeration equipment, gaseous refrigerant is passed from the suction pipe 71 to the scroll compressor. Compression space 6 of compression element 55a
The refrigerant sucked into the refrigerant 9 and compressed in this compression space is discharged from the discharge pipe 75 via the discharge valve 72a of the shaft 58 as shown by the arrow. 73a and 73b are seal rings between the high pressure side and the low pressure side. At this time, if the oil supply mechanism shown in FIG. 4 is applied to improve the sealing performance of the compression space 69, the oil will be mixed with the refrigerant in the discharge process and taken away, and will not serve as a seal. Therefore, an appropriate oil supply mechanism is necessary. It was coveted.

0004

[Means for Solving the Problems] In the present invention, a ring-shaped seal guard is provided on each end plate of the first and second scrolls on the outside of the seal ring between the high and low pressure chambers to improve the sealing performance of the seal ring. In addition, an oil hole is formed between the seal guard and the seal ring in one or both of the end plates to improve the sealing performance of the compression space of the scroll compression element.

[0005]

[Operation] The oil on the high pressure chamber side inside the seal ring leaks outward from the gap between the seal ring and the end plate of one or both of the first and second scrolls, and the oil leaks outward from the gap between the seal ring and the end plate of one or both of the first and second scrolls, and the oil leaks outward from the gap between the seal ring and the end plate of one or both of the first and second scrolls, and the oil leaks outward from the gap between the seal ring and the end plate of one or both of the first and second scrolls. The oil is once collected in the gap between the ends of the cylinder, improving the sealing performance of the high and low pressure chambers, and furthermore, oil flows from the oil hole in the end plate and the outer periphery of the end plate to the compression chamber, improving the sealing performance of the compression space.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a double rotary type scroll compressor according to the present invention will be described with reference to FIGS. 1 to 3. Fig. 1 is a vertical cross-sectional view of an embodiment of a double-rotating scroll compressor, Fig. 2 is a view of the scroll compression element in Fig. 1 in the direction of arrow A, and Fig. 3 is a partially enlarged view of the scroll compression element in Fig. 1. Show the diagram. To explain the structure, an electric element 54 having a rotor 52 and a stator 53 is housed in the upper side of the closed container 51, and a scroll compression element 55 is housed in the lower side. having a connected shaft 58;
A first scroll 59 on the driving side has a spiral wrap 57 erected on an end plate 56; and a shaft 60 eccentric to the axis of the shaft 58 of the first scroll 59; The second scroll 6 on the driven side has a spiral wrap 62 that faces and engages with the scroll 59.
3, ■ a main frame 65 having a main bearing 64 that pivotally supports the shaft 58 of the first scroll 59; ■ an auxiliary frame 67 having an auxiliary bearing 66 that pivotally supports the shaft 60 of the second scroll 63; A plurality of compressed spaces 69 formed by the first scroll 59 and the second scroll 63 housed in a hollow chamber 68 formed inside by the main frame 65 and the auxiliary frame 67 are moved from the outside to the inside. An Oldham joint 70 rotates these scrolls 59 and 63 in the same direction so that the scrolls 59 and 63 are gradually contracted and compressed.

Referring to FIG. 3, seal rings 73a and 73b are engaged with ring-shaped grooves 65a and 67a of the main frame 65 and auxiliary frame 67, respectively, and ring-shaped grooves 73a and 73b are respectively engaged with the mirror plates 56 and 61 on the outside thereof. Seal guard 74a,
74b is provided, and an end plate 56 between each of the seal guards 74a, 74b and the seal rings 73a, 73b,
The oil holes 56a and 61a are penetrated through 61.

Next, the operation and effect will be explained. When the scroll compression element 55 is rotated by the motorized element 54 in FIG.
Gaseous refrigerant is sucked in through the suction port 71, compressed by the scroll compression element 55, and reaches the maximum pressure in the central compression space 69. (same as 72a in FIG. 5) and is discharged from the discharge pipe 75. During this time, the oil accumulated in the sealed container 51 to the extent that the upper surface of the main frame 65 is submerged flows into the oil holes 65a and 67a (see FIG. 1) opened in the main frame 65 and the auxiliary frame 67, and flows into the airtight container 51 as shown in FIG. leaks from the high pressure side to the low pressure side through the gaps between the seal rings 73a and 73b and the end plates 56 and 61, respectively, as shown by the arrows.
It accumulates in the ring-shaped space between the seal guards 74a and 74b and improves the sealing performance between the high-pressure and low-pressure chambers. Furthermore, some of this accumulated oil is absorbed into the oil holes 56 of the end plates 56 and 61.
a, 61a to the compression space 69 in the middle of compression, and a part of the seal guards 74a, 74b and the main frame 65, respectively.
, leaks through the gap with the auxiliary frame 67 and flows from the outer periphery of the end plates 56, 61 to the compression space 69, improving the sealing performance of the compression space.

[0009]

[Effects of the invention] By collecting oil in the ring-shaped space between the seal ring and the seal guard, the sealing performance between the high pressure side and the low pressure side is improved, and furthermore, this collected oil can be removed from the oil hole drilled in the end plate. In addition, the oil leaking from the seal guard is supplied to the compression space of the scroll compression element through the outer periphery of the end plate, thereby improving the sealing performance of the compression space and increasing the efficiency of the scroll compressor as a refrigeration device.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of an embodiment of a dual rotary scroll compressor according to the present invention.

FIG. 2 is a view from arrow A of the end plate of the second scroll of the scroll compression element in FIG. 1;

FIG. 3 is a partially enlarged view of the scroll compression element of FIG. 1;

FIG. 4 is a longitudinal sectional view of a conventional double-rotating scroll fluid machine used as a vacuum pump.

FIG. 5 is a longitudinal sectional view of a conventional double-rotating scroll compressor.

[Explanation of symbols]

51 Sealed container 54 Electric element 55 Scroll compression element 59 First scroll 63 Second scroll 65 Main frame 67 Auxiliary frame 68 Hollow chamber 69 Compressed space 70 Oldham joint 71 Suction pipe 72 Discharge hole 73a Seal ring 73b Seal ring 74a Seal guard 74b Seal guard

Claims (1)

[Claims] 1. A motorized element having a rotor and a stator is housed in the upper side of a closed container, a scroll compression element is housed in the lower side, and the scroll compression element has a shaft connected to the electric element. The first one has a spiral wrap on the mirror plate.
a second scroll having a shaft eccentric to the center of the shaft of the first scroll, and having a spiral wrap erected on an end plate that faces and engages with the first scroll;
a main frame having a main bearing that pivotally supports the shaft of the first scroll; an auxiliary frame having an auxiliary bearing that pivotally supports the shaft of the second scroll; the main frame and the auxiliary frame; Compression is performed by gradually reducing a plurality of compression spaces formed by the first scroll and the second scroll housed in a hollow chamber formed inside from the outside to the inside. An Oldham joint that rotates the scrolls in the same direction, and a low-pressure refrigerant is introduced into the hollow chamber from the suction pipe, and a discharge hole is provided in the shaft of the first scroll. In type scroll compressor,
A ring-shaped seal guard is provided on each end plate of the first and second scrolls on the outside of the seal ring between the high and low pressure chambers, and a ring-shaped seal guard is provided on one or both of the end plates between the seal guard and the seal ring. A double-rotating type scroll compressor characterized by having oil holes in it.