KR950013896B1 - Scroll type compressor - Google Patents

Abstract

The scroll compressor for compressing the cooling media in the air conditioner, has a housing(31) containing the oil, rotor(34) for driving the main shaft(34), rotary scroll(33) and stationary scroll(32), inner rotor(56) combined with the rotor shaft(59) and the opposite-side outer rotor(57) and oil suction chamber(53) for supplying the oil to the passage(60) of the main shaft. A suction tube(38) is connected to the housing between the stationery scroll(32) and rotary scroll(33). A conical diffusion hole(61) for supplying the oil to the respective sections is formed on the upper passage of the main shaft. cooling fins(64) are mounted on the outside wall of the housing(31) for cooling the oil.

Description

Scroll compressor

1 is a cross-sectional view showing a conventional scroll compressor.

2 is a cross-sectional structural view showing a scroll compressor according to the present invention.

3 is an enlarged cross-sectional view of the main portion of FIG. 2 showing an oil supply portion of a scroll compressor according to the present invention;

4 is a plan view of a main portion for explaining the operation of the oil supply unit according to the present invention.

5 is a bottom view showing the cover of the oil supply unit according to the present invention.

6 is a bottom view of the main portion showing the lower plate of the oil supply unit according to the present invention.

7 is a main perspective view showing the main shaft of the scroll compressor according to the present invention.

* Explanation of symbols for main parts of the drawings

30: scroll compressor 31: housing

32: fixed scroll 33: rotating scroll

34: spindle 40: bearing frame

50: oil supply unit 51: oil

64: cooling fin

The present invention relates to a scroll compressor for compressing a refrigerant gas.

The scroll compressor is mainly installed in the air conditioning apparatus to serve to compress the refrigerant. In the conventional scroll compressor, as shown in FIG. 1, the fixed scroll 2 and the rotating scroll (the upper portion of the housing 1) are shown in FIG. 3), the rotary scroll (3) is rotatably fixed to the main shaft (4) rotated by the lower rotating means. Accordingly, when the main shaft 4 rotates, the rotary scroll 3 rotates to make a relative motion with the fixed scroll 2, and the refrigerant is compressed as known in the relative movement. At this time, the rotating means is composed of a conventional stator (5) and the rotor (6), the refrigerant is introduced into the housing (1) through the inlet (7) is moved in the direction of the arrow is guided to the suction chamber (8) , It is compressed by the fixed and rotating scrolls 2 and 3 and then discharged to the discharge port 9.

In addition, the scroll compressor 10 operating as described above is provided with bearings for smooth rotation of the rotary scroll 3, that is, a thrust bearing between the rotary scroll 3 and the bearing frame 11. 12) and the Ouldham coupling 13 are installed, and needle bearings 14 and 15 are installed between the end 3a and the main shaft 4 of the rotational scroll 3, and the main shaft 4 and the frame ( A thrust bearing 17 is installed between the 16.

In addition, the oil 18 filled in the bottom of the housing 1 is supplied by lubrication of the bearings by oil supply means, and the oil supply means has the end 4a of the main side 4 submerged in the oil 18. The foam plate 19 is provided in this end 4a, and the flow path 20 reaches from the end 4a of the main shaft 4 to the end 3a of the rotary scroll 3 at the center of the main shaft 4. ) Is penetrated.

In the conventional scroll compressor having such a configuration, the oil 18 is supplied to each bearing through the flow path 20 by the pumping action by the centrifugal force generated by the rotation of the main shaft 4. Here, since the main shaft rotates at a low speed, the pumping action by the centrifugal force is small, and as a result, the oil supply capacity is relatively weak. Therefore, when the flow path is blocked by contaminants, etc., lubrication supply becomes difficult. As a result, when the oil supply is locally interrupted, lubrication failure may occur, causing damage to the bearings and noise.

In addition, in the conventional scroll compressor, since the oil and the refrigerant gas flow together in the same space, the oil and the refrigerant gas are mixed to adversely affect the compression performance, and the refrigerant gas in which the oil is mixed with the valve or the evaporator connected to the scroll compressor is Circulation lowers the freezing capacity. In addition, the oil interferes with the thermal shear and leaves a residue in a passage through which the refrigerant gas flows, which greatly reduces the performance of the entire air conditioner.

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems as described above, and an object thereof is to allow refrigerant gas to be sucked and compressed into the scroll compressor and oil supplied to each bearing installed in the scroll compressor to be circulated separately from the scroll compressor to circulate the refrigerant. It is to provide a scroll compressor that can prevent oil from entering the gas.

In addition, another object of the present invention is to ensure that the oil supplied to each bearing in the scroll compressor forcibly circulated by the pump, supplying a sufficient amount of oil to each bearing to prevent damage caused by clogging of the flow path, poor lubrication, etc. It is to provide a scroll compressor that can prevent, and cool the heated oil to prevent the scroll compressor from becoming hot.

The above object is a main shaft having a housing with an oil built therein, a stator mounted on an inner wall of the housing and a flow path through which oil flows, and a rotor for rotating the same, and a rotating scroll and housing integrally rotating with the main shaft. A fixed scroll fixed to an inner wall of the inner wall, an inner rotor integrally rotatably mounted to the rotor shaft constituting the lower end of the main shaft, and an outer rotor that rotates relative thereto, and a plurality of bearings rotatably supporting the rotating scroll. A scroll compressor comprising a bearing frame to be mounted, the scroll compressor comprising: a suction pipe formed in a housing between the fixed scroll and a rotating scroll at an upper position of the bearing frame; a suction port formed in a cover surrounding the outer rotor; An outlet formed in the lower plate to rotatably support the end of the inner and outer rotors. In accordance with the giant slalom can be achieved by a scroll compressor characterized in that it includes an oil supply chamber to the oil suction passage to send formed consisting of the feed oil through the inlet and outlet on the main shaft.

Hereinafter, the scroll compressor according to the present invention will be described in detail with reference to the accompanying drawings. 2 to 7 show a preferred embodiment of the scroll compressor according to the present invention. As shown in FIG. 2, the scroll compressor 30 has a fixed scroll 32 for compressing a refrigerant gas in the housing 31. And a rotating scroll 33, the rotating scroll 33 is rotatably fixed to the main shaft 34, and the main side 34 is connected to a rotating means comprising a stator 35 and a rotor 36. It is installed to rotate by. As the fixed scroll 32 and the rotating scroll 33 are known, scrolls 32a and 33a each having an involute curve or an arc curve are formed, and the suction chamber 38 is formed from the suction pipe 38. The refrigerant gas sucked into 37 is compressed by the relative motion of the scrolls 32a and 33a to be discharged to the discharge port 39.

In addition, a plurality of bearings are installed for smooth rotation of the main shaft 34 and the rotary scroll 33. That is, the thrust bearing 41 and the Ouldham coupling 2 are installed between the rotary scroll 33 and the bearing frame 40, and between the end 33b and the main shaft 34 of the rotary scroll 33. Needle bearings 43 and 44 are installed, and thrust bearings 46 are installed between the main shaft 34 and the frame 45.

The bearings are lubricated by supplying the oil 51 stored in the lower part of the housing 31 by the oil supply part 50. The oil supply part 50 is the end 34a of the main shaft 34 as shown in FIG. ) And the lower plate 52 which is condensed, and an oil suction chamber 53 is installed between the lower plate 52 and the main shaft 34 to prevent leakage of oil and to lower the lower plate of the oil suction chamber 53. A bearing 55 is installed between the 52 and the main body 34 to rotatably support the main shaft 34.

In addition, a bar rotor pump is installed as a pump means for forcibly suctioning the oil 51 under the lower plate 52. The rotor rotor pump is installed in the space formed in the lower plate 52 and the outer rotor 56. ), And the inner and outer rotors 56 and 57 are fixed to the cover 58 fixed to the lower plate 52 by screws. The inner rotor 56 installed as described above is rotatably fixed to the rotor shaft 59 formed to extend to the end 34a of the main shaft 34, as shown in FIGS. The lower plate 52 and the cover 58 which the rotors 56 and 57 contact each other are provided with a discharge port 52a and a suction port 58a.

In addition, the main side 34 is provided with a flow path 60 through which the oil introduced through the oil suction chamber 53 is supplied to the upper portion of the main shaft 34, which is formed at the center of the main shaft 34. It is formed extending in the axial direction.

The flow path 60 extends below the end portion 33b of the rotary scroll 33 and has a conical diffusion groove 61 as shown in FIGS. 2 and 7. Therefore, the oil 51 supplied through the flow path 60 diffuses in the circumferential direction of the end portion 33b, and the cylindrical groove 62 in which the end portion 33b of the rotary scroll 33 is mounted has oil in each bearing. A plurality of flow paths 63 to be supplied are formed.

Meanwhile, as shown in FIG. 2, the scroll compressor 30 includes a bearing frame 40 which prevents the refrigerant gas introduced into the housing 31 from falling and blocks the oil 51 supplied to the bearing from rising. On the lower outer peripheral surface of the housing 31, a cooling fin 64 for cooling the oil 51 is formed integrally with the housing 31.

The oil supply principle in the scroll compressor configured as described above will be described with reference to FIGS. 2 to 7. First, when the main shaft 34 is rotated by the stator 35 and the rotor 36, which is a rotating means, the rotating scroll 33 fixed to the main shaft 34 is rotated accordingly, and from the suction pipe 38 The sucked refrigerant is compressed in the suction chamber 37 by the relative movement between the rotary scroll 33 and the fixed scroll 32 and discharged through the discharge port 39 as is known.

At the same time, when the main shaft 34 is rotated, this rotational force is transmitted to the rotor shaft 59 formed on the end 34a of the main shaft 34, the inner rotor 56 of the rotor rotor pump fixed to the rotor shaft 59 At the same time as the inner rotor 56 and the outer rotor 57 are rotated relative to each other and starts to suck the oil 51 through the suction port 58a of the cover 58. The sucked oil 51 is discharged to the outlet 52a of the lower plate 52 so that the oil 51 is supplied to the oil suction chamber 53 formed between the main shaft 34 and the lower plate 52, and the supplied oil ( 51 is supplied to the conical diffusion groove 61 through a flow path 60 formed in the main shaft 34 to supply oil to the needle bearings 43 and 44 between the main shaft 34 and the rotary scroll 33. . In this case, as shown in FIG. 7, the oil 51 supplied by the diffusion groove 61 and the flow path 63 is evenly distributed in the circumferential direction of the end 33b of the rotary scroll 33.

The oil 51 supplied to the needle bearings 43 and 44 as described above is supplied to the thrust bearing 41 and the Ouldham coupling 42 between the rotary scroll 33 and the bearing frame 40, It is then supplied to a thrust bearing 46 between the main shaft 34 and the frame 45.

The oil 51 thus supplied is moved in the direction of the arrow and returned to the lower part of the housing 31 as shown in FIG. 2 after the lubrication action, and is cooled by the cooling fins 64 formed on the outside of the housing 31. Therefore, the heat is not transmitted to the scroll compressor 30.

As described above, according to the scroll compressor according to the present invention, the refrigerant gas is directly supplied to the scroll to avoid residence in the housing, it is possible to prevent the mixing of the refrigerant gas and oil to prevent contamination of the expander or valve. . In addition, by forcibly supplying the oil supply by the pump, clogging of the flow path and poor lubrication are prevented, and the circulated oil is cooled by the cooling fins, thereby preventing the scroll compressor from becoming hot.

Claims (1)

A main shaft 34 having a housing 31 with oil embedded therein, a stator 35 mounted on an inner wall of the housing 31, and a flow path 60 through which the oil 51 flows, and a rotor for rotating the same. (34), a rotating scroll (33) which rotates integrally with the main shaft (34), a fixed scroll (32) fixed to an inner wall of the housing, and a rotor shaft (59) constituting a lower end of the main shaft (34). An inner rotor 56 integrally rotatably mounted to the inner rotor 56 and an outer rotor 57 which rotates relative to the inner rotor 56, a suction port 58a formed in the cover 58 surrounding the rotatable rotor 57, and a bearing 55. The outlet port 52a formed in the lower plate 52 rotatably supporting the end 34a of the main shaft, and the inlet port 58a and the outlet port according to the relative rotation of the inner and outer rotors 56 and 57. In the scroll compressor composed of an oil suction chamber 53 for sending the oil supplied through the 52a) to the flow path 60 formed in the main shaft 34, the bare A suction pipe 38 is formed in a housing between the fixed scroll 32 and the rotary scroll 33 at an upper position of the frame 40, and oil is supplied to each of the upper portions of the flow path 60 formed on the main shaft 34. Conical diffusion groove (61) is formed to enable the scroll compressor, characterized in that the cooling fin (64) for oil cooling is installed on the outer surface of the housing (31).