KR101001596B1 - Belt type - Oil Supply Structure Of Scroll Compressor - Google Patents

Abstract

The present invention relates to an oil lubrication structure of a belt-driven scroll compressor in which lubrication and cooling of components installed in the shaft seal and the back pressure chamber are performed smoothly. A housing having a separator, a fixed scroll installed in the housing, a swing scroll coupled to the fixed scroll, a main frame coupled to the front surface of the housing to form a back pressure chamber, and rotatably disposed within the main frame. A belt driven scroll compressor having a drive shaft having one end connected to the swing scroll and a drive pulley for supplying power to the drive shaft, wherein the housing includes a first oil passage penetrating forward from the oil separator. The second oil is connected to the main frame from the first oil passage to the shaft seal A furnace is formed, and a back pressure chamber is formed between the main frame and the swing scroll, and a return passage connecting the back pressure chamber and the suction chamber is formed in the main frame, and the back pressure control valve is installed in the return passage. Each component installed inside has the effect of smoothly supplying the oil needed for lubrication.

Belt Driven, Scroll Compressor, Oil Structure, Back Pressure Control Valve

Description

Oil supply structure of belt driven scroll compressors {Belt type-Oil Supply Structure Of Scroll Compressor}

The present invention relates to an oil lubrication structure of a belt driven scroll compressor, and more particularly, to an oil lubrication structure of a belt driven scroll compressor in which lubrication and cooling of components installed in the shaft seal and the back pressure chamber are performed smoothly.

In general, the compressor applied to the refrigeration air conditioner is developed and used in the compressor of various operation methods according to the operation method, it is divided into reciprocating, rotary and scroll compressor according to the operation method.

Here, the reciprocating compressor is a compressor in which a piston reciprocates in a cylinder and sucks, compresses, and discharges a working fluid, that is, a refrigerant, and a rotary compressor is a compressor in which a compressor rotates while a rotor rotates in a cylinder. .

Particularly, the scroll compressor compresses the refrigerant by performing a compression cycle of suction, compression, and discharge during the swinging movement according to the relative rotation while the swinging scroll and the fixed scroll forming the respective spiral wraps are fitted to each other. That's the way it is.

The pivoting scroll is connected to the driving shaft to perform the pivoting movement, and the means for rotating the driving shaft are divided into a belt driving type using a driving pulley and an electric type using a driving motor.

However, the belt drive type using the drive pulley among the scroll compressors according to the prior art has oil and lubrication and cooling action only for the turning scroll and the fixed scroll, and the lubricating and cooling action for other components including the drive shaft for rotating the turning scroll. There was a problem that could not be made properly.

The present invention has been made to solve the above problems, an object of the present invention is to provide cooling and lubrication by smoothly supplying oil to the friction portion between the components installed in the housing and the main frame as well as the rotating scroll and fixed scroll It is to provide an oil lubrication structure of a belt driven scroll compressor to enable the action.

In order to achieve the above object, the oil lubrication structure of the belt-driven scroll compressor according to the present invention has a suction chamber for sucking the refrigerant and oil and a housing formed with an oil separator in the inner center, fixed scroll installed in the housing A rotational scroll coupled to the fixed scroll, a main frame coupled to the front surface of the housing to form a back pressure chamber, a drive shaft rotatably disposed in the main frame, and one end of which is connected to the pivoting scroll; In the belt driven scroll compressor composed of a drive pulley for supplying power to the drive shaft, the housing is formed with a first oil passage penetrating forward from the oil separator, the main frame is connected to the shaft seal from the first oil passage A second oil passage is formed, and a back pressure chamber is formed between the main frame and the turning scroll. And a return passage connecting the back pressure chamber and the suction chamber to the main frame, and a back pressure control valve is installed in the return passage.

In addition, the first oil passage formed in the housing is characterized in that the orifice is installed.

In addition, an oil discharge hole is formed on an inner circumferential surface of the main frame in which the back pressure chamber is formed, and the oil discharge hole is formed on an upper portion of the inner circumferential surface thereof.

According to the present invention having the above-described configuration, by forming each of the first oil passage, the second oil passage and the orifice in the housing and the mainframe, each component installed therein smoothly oils required for lubrication. There is an effect that can be supplied.

In addition, the back pressure chamber has a useful effect of increasing the compression efficiency of the whole compressor by preventing the temperature rise by reducing the mechanical frictional heat between each component as the back pressure chamber is always embedded with the appropriate level of oil.

Hereinafter, with reference to the accompanying Figures 1 to 6 will be described in detail a preferred embodiment of the present invention.

As shown in Figures 1 to 3, the belt driven scroll compressor 1000 according to the present invention includes a suction chamber 101 for sucking the refrigerant and oil and an inner center of the housing having an oil separator 110 ( 100), the fixed scroll (S1) is installed in the housing 100, the rotating scroll (S2) coupled to the fixed scroll (S1), the back pressure chamber 201 is coupled to the front surface of the housing 100 The main frame 200 and the drive shaft 300 is rotatably disposed in the main frame 200 and one end is connected to the pivoting scroll (S2), and to supply power to the drive shaft 300 It consists of a drive pulley (400).

First, an inlet (A) for sucking a refrigerant is formed outside the housing 100, and an intake chamber 101 through which the refrigerant and oil are introduced is formed inside the communicating body. The discharge chamber 102 which discharges the refrigerant | coolant and oil compressed in the state of high pressure from inside is formed.

The housing 100 is formed in a circular shape with one surface open and a fixed scroll S1 is installed therein.

And, in the front of the fixed scroll (S1) is coupled in the form of being inserted by inserting the turning scroll (S2).

Here, the fixed scroll (S1) is fixed to the inner wall surface of the housing 100 by a fastening means such as bolts, screws, and does not rotate, the rotating scroll (S2) is connected to the drive shaft 300 through the pivoting movement Refrigerant compression is performed.

In addition, the refrigerant discharged in the compressed state of the high pressure by the compression action of the fixed scroll (S1) and the revolving scroll (S2) in the discharge chamber 102 between the housing 100 and the fixed scroll (S1) refrigerant gas And an oil separator 110 for separating oil and oil, respectively.

The refrigerant gas separated by the oil separator 110 is discharged to the refrigerant discharge port 104 of the discharge chamber 102 and oil is accumulated on the bottom surface of the discharge chamber 102.

Meanwhile, as shown in FIGS. 2 and 3, the housing 100 has a first oil passage 120 for supplying oil accumulated in the bottom of the discharge chamber 102 to the main frame 200 to be described later. do.

Specifically, in the first oil passage 120 formed in the housing 100, the main frame 200 is formed in a state in which a hole having a predetermined diameter extends downward from the bottom of the rear surface of the discharge chamber 102 to a predetermined length. After bending towards, it extends forward to the open front end of the housing 100.

In particular, the first oil passage 120 is additionally provided with an orifice 130 for reducing the flow rate of the incoming oil.

Through this, the oil of a certain level can be moved to the mainframe 200 to be described later while maintaining a stable pressure in the process of moving along the inner diameter.

On the other hand, the main frame 200 is installed between the housing 100 and the drive pulley 400 to be described later. In addition, a bearing (B) rotatably supporting the drive shaft 300 is interposed between the main frame 200 and the drive shaft 300, and a shaft seal 210 is formed to prevent pressure leakage.

In addition, a back pressure chamber 201 is formed at the rear of the main frame 200 between the turning scroll S2.

In addition, the back pressure chamber 201 is provided with a sliding bush (211), oldham ring (oldham ring, 212), etc., thrust plate (thrust plate) to obtain a high compression efficiency through the effective sealing to the inside , 213), an o-ring (214) and a tip seal (215) are installed.

And, as shown in Figure 4, the main frame 200 is formed with a second oil passage 220 in communication with the first oil passage 120 formed in the housing 100 described above.

The second oil passage 220 formed in the main frame 200 is connected in a state where one end is in contact with the first oil passage 120 of the housing 100 and the other end penetrates toward the shaft seal 210. It consists of a structure.

That is, since the oil introduced into the second oil passage 220 of the main frame 200 is discharged toward the shaft seal 210, the friction heat therein may be greatly reduced.

In addition, as shown in Figure 5, the inner circumferential surface of the main frame 200 in which the back pressure chamber 201 is formed, an oil discharge hole 230 that penetrates from the inner surface to the outside is formed, and the cap is formed on the outside of the cap. Bolt 231 is coupled.

In addition, the oil discharge hole 230 is preferably formed in the upper portion of the main frame 200 to be discharged after sufficiently performing a lubricating action for each component installed in the back pressure chamber 201.

In particular, the oil discharge hole 230 is provided with a back pressure control valve 240 is opened when the pressure inside the back pressure chamber 201 is a predetermined value or more.

Here, the back pressure control valve 240 is disposed in the oil discharge hole 230, the ball 241 is opened and closed according to the internal pressure of the back pressure chamber 201, between the ball 241 and the cap bolt 231 It is composed of a spring 242 interposed in the elastic action.

That is, when the oil pressure in the back pressure chamber 201 is greater than or equal to a predetermined value, the pressure presses the ball 241 and the pressurized ball 241 compresses the spring 242 so that the oil is discharged to the oil discharge hole 230. The oil introduced in this way is moved to the oil return passage 250 to be described later.

Accordingly, the back pressure control valve 240 always maintains a constant level of oil staying in the back pressure chamber 201 so that each component can be sufficiently lubricated and cooled without friction loss.

An oil return passage 250 is formed on the rear surface of the main frame 200 to communicate with the oil discharge hole 230, and the oil return passage 250 communicates with the suction chamber 101 of the housing 100.

In addition, the second oil passage 220 and the oil return passage 250 formed on the rear surface of the main frame 200 are formed at positions opposite to each other, which is effective for oil circulation.

On the other hand, the drive pulley 400 is to transmit the power of the engine to the drive shaft 300, is connected to the front of the main frame 200.

The outer side of the drive pulley 400 is formed with a pulley 410 having a V groove, the power transmission means such as a V groove belt (not shown) is connected to the pulley 410.

Hereinafter, the oil lubrication structure of the belt driven scroll compressor 1000 according to the embodiment of the present invention will be described in detail with reference to FIGS. 2 to 6.

First, the refrigerant supplied from the compression unit is gas-liquid separated through the oil separator 110 formed in the housing 100, and the separated oil is naturally discharged into the first oil passage 120 by the pressure inside the discharge chamber 102. .

As such, the oil moving along the first oil passage 120 of the housing 100 passes through the orifice 130 installed at one side.

Here, the orifice 130 is accelerated once again in the process of the oil moved to the state of high pressure is converted to the state of low pressure.

Subsequently, the oil passing through the orifice 130 moves along the second oil passage 220 of the main frame 200, and then is discharged to the shaft seal 210 installed in the main frame 200.

Then, the oil discharged to the shaft seal 210 is moved along the outer circumference of the rotating drive shaft 300, at this time, the lubrication action is naturally made to the drive shaft 300 and in this process the oil is back pressure chamber ( 201).

The oil supplied to the back pressure chamber 201 is cooled and lubricated for each component installed therein.

On the other hand, as shown in Figure 5 and 6 when the internal pressure is increased by the amount of oil supplied to the back pressure chamber 201, the back pressure control valve 240 is opened to discharge a part of the oil by the internal pressure is constant Keep it. In addition, the oil discharged through the back pressure control valve 240 is moved back to the compression unit between the fixed scroll (S1) and the revolving scroll (S2) through the oil return passage 250 to perform a lubrication action. At this time, in order for the oil to move to the compression unit through the oil return passage 250, it is natural that the communication passage of the structure communicating with the oil return passage is formed in the housing 100 as well.
As a result, the oil discharge hole 230, the oil return passage 250, the oil passing through the communication passage sequentially is compressed with the refrigerant supplied from the suction port (A) is discharged again toward the oil separator (110).

This process is repeated to achieve continuous lubrication.

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited to such specific embodiments, and those skilled in the art may appropriately change within the scope described in the claims of the present invention. This will be possible.

1 is a cross-sectional view showing the configuration of an oil lubrication structure of a belt driven scroll compressor according to an embodiment of the present invention.

FIG. 2 is a front view of the housing of FIG. 1. FIG.

3 is a longitudinal cross-sectional view of the housing of FIG. 1.

4 is a longitudinal cross-sectional view of the mainframe of FIG. 1.

FIG. 5 is a perspective view of the main frame of FIG. 4 viewed from the back side. FIG.

Figure 6 is a schematic cross-sectional view showing the oil flow of the oil lubrication structure of the belt driven scroll compressor according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100 housing 110 oil separator

120: first oil passage 130: orifice

200: main frame 210: shaft seal

220: second oil passage 230: oil discharge hole

240: back pressure control valve 300: drive shaft

400: driving pulley

Claims (3)

A suction chamber for sucking refrigerant and oil and having an oil separator at the inner center thereof, a fixed scroll installed in the housing, a turning scroll coupled to the fixed scroll, and a back pressure chamber coupled to the front surface of the housing; In the belt driven scroll compressor comprising a main frame to be formed, a drive shaft rotatably disposed in the main frame and one end connected to the swing scroll, and a drive pulley for supplying power to the drive shaft, The housing is formed with a first oil passage penetrating forward from the oil separator, the main frame is formed with a second oil passage connected from the first oil passage to the shaft seal, a back pressure chamber is formed between the main frame and the swing scroll. The main frame is provided with an oil return passage connecting the back pressure chamber and the suction chamber, and the oil return passage is provided with an oil back pressure control valve. The method of claim 1, The oil supply structure of the belt driven scroll compressor, characterized in that the orifice is installed in the first oil passage formed in the housing. The method of claim 2, An oil discharge hole is formed on an inner circumferential surface of the main frame in which the back pressure chamber is formed, and the oil discharge hole is formed on an inner circumferential surface of the main frame.

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