KR20010102788A - Oil supply structure for scroll compressor - Google Patents

Abstract

The present invention relates to an oil lubrication structure of a scroll compressor, and the method of lubricating the thrust surface between the bottom surface of the hard plate portion and the upper surface of the main frame of the conventional scroll scroll is supplied in such a manner that the oil of the oil storage portion flows without being discharged. When a load is applied to the surface, only a small amount of oil is supplied, and all the rest is discharged. Therefore, an alternative refrigerant compressor, which has a large load, requires a larger amount of oil. Since there is a lot of problems such as the occurrence of wear due to the oil film breakage of the thrust surface or metal friction due to the supply of the thrust surface, the present invention provides a gap between the bottom of the hard plate portion of the swing scroll and the upper surface of the main frame. It is possible to smoothly supply a certain amount of oil to the thrust surface at all times. Because the oil to the oil supply passageway formed in the end plate unit to write is largely possible to reduce the wear caused due to the thrust side oil film break five days or metal friction.

Description

OIL SUPPLY STRUCTURE FOR SCROLL COMPRESSOR}

The present invention relates to an oil lubrication structure of a scroll compressor, and more particularly, to constantly supply a constant amount of oil to the thrust surface between the bottom surface of the hard plate portion of the swing scroll and the upper surface of the main frame installed in the scroll compressor. .

In general, as shown in FIG. 1, the main compressor and the subframe 8 and the subframe 8 are disposed at upper and lower portions of the sealed container 21 having a predetermined internal volume, respectively. The stator 24 and the rotor 25 forming the motor 23 are installed between the 8 and 22, and interlocked with the rotation of the rotor 25 through the center of the rotor 25. An eccentric portion 2 is formed at an upper end of the installed crank shaft 1, and a slide bush 3 is inserted into the eccentric portion 2 which is radially variable and receives rotational force of the crank shaft 1 in the tangential direction. .

In addition, a fixed scroll 27 having an involute wrap 26 is fixed on the main frame 8, and a compression movement while sliding with the slide bush 3 is formed on the wrap 26 formed on the fixed scroll 27. The wrap 28 of the swinging scroll 4a is pivotally engaged so that the lower portion of the swinging scroll 4a is inserted into the eccentric portion 2 of the crankshaft 1. It is coupled to, and the old dam ring 29, which is an anti-rotation mechanism for preventing the rotation of the swing scroll (4a) is coupled between the lower surface of the swing scroll (4a) and the upper surface of the main frame (8).

The high and low pressure separator 30 separating the inside of the sealed container 21 into a high pressure part and a low pressure part is coupled to the upper surface of the fixed scroll 27 in the sealed container 21 by a plurality of bolts 31. A check valve 32 and a valve housing 33 for regulating the flow of refrigerant gas of high temperature and high pressure compressed in a pocket space, which is a compression space, are coupled to the center of the high and low pressure separator 30, and the sealed container 21 is provided. ), A suction pipe 34 and a discharge pipe 35 through which the refrigerant gas is sucked and discharged are disposed, and a discharge port 36 is formed at the center of the fixed scroll 27. The lower portion is configured to be filled with the oil supplied to the sliding portion.

Operation of the scroll compressor including each component as described above, first, when the rotor 25 of the motor 23 is rotated by the applied current, the crank shaft ( As 1) rotates, the turning scroll 4a is circularly rotated, i.e., orbitally rotated, using the eccentric distance of the eccentric portion 2 as a radius.

The turning scroll 4a rotates by turning the member at a distance away from the center of the crankshaft 1 by the turning radius while the rotation is prevented by the old dam ring 29 as the rotation preventing mechanism. By the swinging movement of the swinging scroll 4a, a pocket which is a compression space is formed by the laps 26 and 28 of the fixed and swinging scrolls 27 and 4a, which pocket is centered by the continuous swinging movement. While moving, the volume is reduced to compress the sucked refrigerant gas and is discharged through the discharge port 36 of the fixed scroll 27.

The refrigerant gas in the high temperature and high pressure state compressed in the pocket formed by the laps 26 and 28 of the fixed and pivoting scrolls 27 and 4a by the pivoting motion of the pivoting scroll 4a is discharge port of the fixed scroll 27. The high pressure portion is introduced into the high pressure portion through a high and low pressure separation plate 30 which is discharged through the 36 to divide the high pressure portion and the low pressure portion, and the refrigerant gas introduced into the high pressure portion flows into the condenser (not shown) through the discharge pipe 35. do.

When the scroll compressor is stopped for a while and then operated again, the gas of the high pressure portion flows back to the low pressure portion, and the wrap 26 of the fixed and turning scrolls 27 and 4a through the discharge port 36 ( It is introduced into the inside of the pocket formed by 28) to rotate the revolving scroll 4a reversely, thereby causing breakage and noise of the wraps 26 and 28 as well as high and low pressure separation to prevent the compression efficiency from being lowered. The check valve 32 and the valve housing 33 provided on the plate 30 serve to prevent the gas of the high pressure portion from flowing back to the low pressure portion.

On the other hand, during operation of the conventional scroll compressor, as shown in FIG. 2, friction is generated on the thrust surface TS between the bottom surface of the hard plate portion 5a of the swing scroll 4a and the upper surface of the main frame 8. To reduce the oil supply.

That is, the oil which rises to the upper end of the crankshaft 1 through the oil supply hole 7 formed in the crankshaft 1 is the slide bush 3 inserted into the eccentric portion 2 of the upper end of the crankshaft 1. It is supplied between the outer circumferential surface of) and the inner circumferential surface of the hard plate portion 5a of the swinging scroll 4a, and moves downward to move to the lower oil storage portion through the drainage groove 8a of the main frame 8.

At this time, a part of the oil moves on the outer circumferential surface of the boss portion 6 of the revolving scroll 4a to the thrust surface TS between the bottom surface of the hard plate portion 5a of the revolving scroll 4a and the upper surface of the main frame 8. It is supplied to reduce the occurrence of friction.

However, the method of lubricating the thrust surface TS between the bottom surface of the hard plate portion 5a and the upper surface of the main frame 8 of the conventional turning scroll 4a is supplied in such a manner that the oil in the oil storage portion flows without being discharged. In fact, when a load is applied to the thrust surface TS, only a small amount of oil is supplied, and all the rest can be discharged. Since it is impossible to supply the required amount of oil smoothly, there are many problems such as the occurrence of abrasion caused by breakage of the oil film of the thrust surface TS or metal friction.

Accordingly, the present invention is to solve the above-mentioned problems, it is possible to always smoothly supply a constant amount of oil to the thrust surface between the bottom surface of the hard plate portion and the main frame of the rotating scroll installed in the scroll compressor of the thrust surface It is an object of the present invention to provide an oil lubrication structure of a scroll compressor that can greatly reduce the occurrence of wear due to oil film breakage or metal friction.

1 is a vertical cross-sectional view showing a typical scroll compressor

Figure 2 is a longitudinal sectional view showing an oil lubrication structure between the bottom surface of the hard plate portion and the upper surface of the main frame of the conventional swing scroll.

Figure 3 is a longitudinal sectional view showing the oil lubrication structure between the bottom surface of the hard plate portion and the upper surface of the main frame of the swinging scroll according to the present invention

4 is a longitudinal sectional view showing a turning scroll according to the present invention;

5 is a bottom view showing a turning scroll in accordance with the present invention.

Explanation of symbols on the main parts of the drawings

One; Crankshaft 4; Turning scroll

5; Hard plate part 6; Boss

7; Oil hole 8; Main frame

9; Oil groove 10; Oil supply passage

11; First vertical through-hole 12; 2nd vertical passage

13; Horizontal aperture 14; Sealing pin

TS; Thrust plane

In order to achieve the above object, the present invention provides an oil groove formed on one side of the upper surface of the main frame to supply oil supplied through the oil supply hole of the crankshaft to the hard plate portion of the revolving scroll, and a thrust between the bottom surface of the hard plate portion of the revolving scroll and the upper surface of the main frame. An oil lubrication structure of a scroll compressor is provided, wherein an oil lubrication passage for lubricating a surface is formed.

Hereinafter, preferred embodiments of the present invention for achieving the above object will be described in detail with reference to the accompanying drawings.

Figure 3 is a longitudinal sectional view showing the oil lubrication structure between the bottom surface of the hard plate portion and the main frame upper surface of the turning scroll according to the present invention, Figure 4 is a longitudinal sectional view showing a turning scroll according to the present invention, Figure 5 is according to the present invention The bottom view showing the revolving scroll WHEREIN: The same code | symbol is attached | subjected about the part same as the prior art, and this invention is demonstrated.

According to the present invention, an eccentric portion (2) is formed at an upper end of the crank shaft (1) installed in the scroll compressor, and the eccentric portion (2) is radially variable and receives a rotational force of the crank shaft (1) in a tangential direction. The bush 3 is inserted, and the boss portion 6 protruding from the lower center of the hard plate portion 5 of the pivoting scroll 4 is inserted into the eccentric portion 2 of the crankshaft 1. Combined with.

In addition, an oil groove 9 formed on one side of the upper surface of the main frame 8 includes oil supplied through the oil supply hole 7 of the crankshaft 1 to the hard plate portion 5 of the pivoting scroll 4. An oil lubrication passage 10 for lubricating the thrust surface TS between the bottom surface of the hard disk portion 5 of the swing scroll 4 and the upper surface of the main frame 8 is formed.

In this case, the oil supply passage 10 is formed at the lower end of the hard plate portion 5 is in communication with the oil supply hole 7 of the crankshaft 1 and the oil groove 9 of the main frame 8, respectively. And first and second vertical through holes 11 and 12 and horizontal through holes 13 formed to communicate with the upper ends of the first and second vertical through holes 11 and 12. A sealing pin 14 for preventing oil outflow to the outside of the hard plate portion 5 is provided at the end of the hard plate portion 5 outer peripheral surface side.

3 to 5, the present invention configured as described above, the oil is raised through the oil supply hole 7 of the crankshaft (1) by the rotation of the crankshaft (1) when the scroll compressor operates. As part of the oil discharged to the upper end of the oil supply hole (7) is supplied to the slide bush (3), the remaining oil is oil supply passage 10 formed in the hard plate portion 5 of the swinging scroll (4) A first vertical through hole of the first and second vertical through holes 11 and 12 communicating with the oil supply hole 7 of the crankshaft 1 and the oil groove 9 of the main frame 8, respectively. An upper surface of the main frame 8 through the second vertical through hole 12 through a horizontal through hole 13 formed to communicate with the upper end of the first and second vertical through holes 11 and 12 through the second one; Since it is supplied to the oil groove 9 on one side, it is always on the thrust surface TS between the bottom surface of the hard plate portion 5 of the swing scroll 4 and the upper surface of the main frame 8. It is possible to smoothly supply a certain amount of oil.

Therefore, the scroll compressor for the alternative refrigerant can eliminate the phenomenon that the lubrication amount decreases even if the surface pressure of the thrust surface TS is increased due to the increase in the discharge pressure, so that the lubrication action of the thrust surface TS can be always performed smoothly. Therefore, it is possible to greatly reduce the occurrence of wear due to the oil film breakage of the thrust surface TS or metal friction.

As described above, the present invention forms an oil lubrication passage in the light plate portion so that a constant amount of oil can be smoothly supplied to the thrust surface between the bottom surface of the light plate portion and the upper surface of the main frame of the swing scroll installed in the scroll compressor. It is a very useful invention that greatly improves the reliability and efficiency of the scroll compressor because it can greatly reduce the occurrence of wear due to oil film breakage or metal friction of the thrust surface.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described embodiments, and the present invention may be commonly used in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the following claims. Anyone with knowledge will be able to make various changes.

Claims (3)

An oil lubrication passage for lubricating oil supplied through the oil supply hole of the crankshaft to the thrust surface between the bottom surface of the pivot plate and the top surface of the main frame of the pivoting frame is provided with oil supplied through the oil supply hole of the crank shaft. Oil lubrication structure of the scroll compressor, characterized in that. 2. The oil supply passage of claim 1, wherein the oil supply passage is formed at a lower end of the hard plate portion and intersects with the first and second vertical through holes respectively communicating with the oil supply hole of the crankshaft and the oil groove of the main frame. Oil lubrication structure of the scroll compressor, characterized in that consisting of a horizontal through-hole formed so as to communicate. 3. The oil lubricating structure of a scroll compressor according to claim 2, wherein a sealing pin is provided at an end portion of the horizontal plate through the outer circumferential surface of the horizontal plate to prevent oil leakage to the outside of the plate.