CN217152309U - Oiling structure for compressor and rotor type compressor - Google Patents

Abstract

The utility model discloses an oiling structure for a compressor and a rotor type compressor, which comprises an eccentric shaft; the center of the main bearing is provided with a main bearing inner hole, and the eccentric shaft penetrates through the main bearing inner hole; the center of the eccentric shaft is provided with an eccentric shaft center hole, and the oil absorption piece is arranged in the eccentric shaft center hole; the oil absorption sheet is a spiral oil absorption sheet; a spiral oil groove is formed in the hole wall of the inner hole of the main bearing and penetrates in the axial direction of the inner hole of the main bearing; a radial oil hole is formed in the eccentric shaft, one end of the radial oil hole is communicated with the central hole of the eccentric shaft, and the other end of the radial oil hole is communicated with the inner hole of the main bearing; the end point of the spiral part of the oil suction sheet is positioned above the radial oil hole; the spiral starting point of the spiral oil groove is positioned below the center of the radial oil hole; the utility model can ensure high cold quantity of low-frequency operation and low power of high-frequency operation of the compressor; and the problem that the main bearing generates large local heat when the compressor runs at high frequency to cause rapid temperature rise and generate shaft-holding faults is avoided.

Description

Oiling structure for compressor and rotor type compressor

Technical Field

The utility model belongs to the technical field of air condition compressor, in particular to a structure and rotor compressor that oils for compressor.

Background

The rolling rotor compressor is driven by a motor to rotate through an eccentric shaft main shaft, and an eccentric rotor rotates along with the inner wall of a cylinder in a clinging manner to form the periodic change of the volume of a crescent space so as to finish the processes of air suction, compression and exhaust; wherein, eccentric shaft main shaft plays the essential element of transmission power, clearance fit between its and the main bearing, for preventing wearing and tearing in the clearance, has refrigerating machine oil usually, when the compressor is at high-speed rotatory, the position that wears generates heat, not only needs the machine oil lubrication, still needs sufficient refrigerating machine oil lubrication to take away the heat.

At present, in order to save energy and reduce consumption, the operation range of the variable frequency compressor is continuously enlarged; for low-frequency operation, the oiling capacity of the refrigerating machine oil is obviously weakened, the distance between the main bearing of the compressor and an oil pool at the bottom of a shell of the compressor is farthest, and whether the oil surface of the oil hole in the eccentric shaft, which is improved by the low-speed rotation of the oil suction piece, can reach the load surface of the main bearing is very important.

Due to the structural design problem of an oil feeding channel from an oil pool to a main bearing surface in the existing compressor structure, when the compressor operates at high frequency, heat cannot be taken away in time, so that local temperature rises sharply, and shaft holding faults are easy to generate; when the compressor operates at low frequency, the oiling height of an oil hole in the eccentric shaft is insufficient, the lubrication of the main bearing surface is insufficient, and the power is increased; meanwhile, the spiral oil groove of the main bearing is not sealed by refrigerating machine oil, so that gas leakage is generated, and the low-frequency volumetric efficiency of the compressor is sharply reduced.

SUMMERY OF THE UTILITY MODEL

To the technical problem who exists among the prior art, the utility model provides a structure and rotor compressor that oils for compressor to when solving current compressor low frequency operation, because the height that oils is not enough, lead to power to rise, gas leakage problem and high frequency operation oil circulation volume are little, the main bearing that leads to embrace the technical problem of axle.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides an oiling structure for a compressor, which comprises an eccentric shaft, a main bearing and an oil absorption sheet; a main bearing inner hole is formed in the center of the main bearing, and the eccentric shaft penetrates through the main bearing inner hole;

the center of the eccentric shaft is provided with an eccentric shaft center hole, and the oil absorption piece is installed in the eccentric shaft center hole; the oil absorption sheet is a spiral oil absorption sheet; a spiral oil groove is formed in the hole wall of the main bearing inner hole and penetrates through the main bearing inner hole in the axial direction;

a radial oil hole is formed in the eccentric shaft, one end of the radial oil hole is communicated with the eccentric shaft center hole, and the other end of the radial oil hole is communicated with the main bearing inner hole; the spiral part ending point of the oil suction sheet is positioned above the radial oil hole; and the spiral starting point of the spiral oil groove is positioned below the center of the radial oil hole.

Further, the ratio of the spiral lift S of the oil absorption sheet to the spiral lift S of the spiral oil groove is 0.3-0.7.

Further, the ratio of the cross-sectional area a of the spiral oil groove to the area A of the radial oil hole is 0.4-0.6.

Further, the spiral direction of the oil absorption sheet is opposite to the spiral direction of the spiral oil groove.

Further, the central hole of the eccentric shaft is a concentric step hole, and the eccentric central hole comprises a mounting hole section and a lift hole section; the mounting hole section is arranged close to the eccentric part of the eccentric shaft, and the lift hole section is arranged at the main shaft part of the eccentric shaft;

the diameter of the mounting hole section is larger than that of the lifting hole section; the oil absorption sheet is installed in the installation hole section; the radial oil hole is arranged on the hole wall of the mounting hole section and is close to the eccentric part of the eccentric shaft.

Further, the ratio of the diameter D of the mounting hole section to the diameter D of the head hole section is 1.3-1.8.

Further, the oil absorption piece is installed in the installation hole section in an interference fit mode.

Furthermore, the interference magnitude between the oil absorption sheet and the mounting hole section is 0.1-0.3 mm.

Further, the distance between the end point of the spiral part of the oil absorption sheet and the center of the radial oil hole is 2-10 mm.

The utility model also provides a rotor compressor, include a structure of oiling for the compressor.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides an oiling structure and rotor compressor for compressor, the spiral part ending point of oil absorption piece is located the top setting of radial oilhole to and the spiral starting point of spiral oil groove is located the center below setting of radial oilhole, guaranteed that the compressor is when the low frequency operation, the highest position of pump body oil level can satisfy the lubrication of main bearing, avoided compressor power to rise and the gas leakage; meanwhile, the low-frequency running cold quantity and the high-frequency running power of the compressor can be ensured to be high; the problem that the main bearing has large local heating value when the compressor runs at high frequency, so that the temperature rises sharply and the shaft-holding fault is generated is avoided.

Further, the ratio of the spiral lift S of the oil absorption sheet to the spiral lift S of the spiral oil groove is set to be 0.3-0.7, under the condition that the spiral lift S of the main bearing oil groove is not changed, along with the increase of the ratio of the spiral lift S of the oil absorption sheet to the spiral lift S of the spiral oil groove, when the compressor operates at a low frequency of 10HZ, the oil level of the refrigerating machine rises gradually at the highest position, and when the ratio of the spiral lift S of the oil absorption sheet to the spiral lift S of the spiral oil groove is 0.3-0.7, the lubrication of the low-frequency main bearing can be met; meanwhile, when the compressor operates at high frequency 120HZ, the flow of the refrigerating machine oil is increased along with the increase of the ratio of the spiral lift S of the oil absorption sheet to the spiral lift S of the spiral oil groove, so that the lubrication of a main bearing is met, when the ratio is more than 0.7, the oil output of the compressor is increased steeply, and the height of an oil pool at the bottom of the compressor is reduced.

Further, the ratio of the cross-sectional area a of the spiral oil groove to the area A of the radial oil hole is set to be 0.4-0.6, under the condition that the area A of the radial oil hole is not changed, along with the increase of the ratio, when the low-frequency 10HZ runs, the highest position of the oil level of the refrigerating machine is gradually lowered, the oil level of the refrigerating machine is lowered to the spiral oil groove of the main bearing without the sealing of the refrigerating machine oil, gas leakage is generated, and the low-frequency volumetric efficiency of the compressor is sharply lowered; when the ratio is between 0.4 and 0.6, oil can be stored in the oil groove of the main bearing to be sealed.

Furthermore, the ratio of the diameter D of the mounting hole section to the diameter D of the lifting hole section is set to be 1.3-1.8, the highest position of the oil level of the refrigerating machine which rises gradually along with the increase of the ratio rises gradually, and when the ratio is 1.3-1.8, the problems of main bearing lubrication and oil groove sealing of 10HZ low-frequency operation and 120HZ high-frequency operation can be balanced, and the oil output of the compressor is large.

Furthermore, the oil absorption piece is arranged in the mounting hole section in an interference fit mode, so that no relative movement between the oil absorption piece and the eccentric shaft is ensured, and the eccentric shaft and the oil absorption piece can rotate synchronously.

Furthermore, the interference magnitude between the oil absorption sheet and the mounting hole is 0.1-0.3 mm; when the interference magnitude is large, in the process of installing the oil absorption sheet, flanging burrs are easily generated in the installation hole, fall off under the high-speed impact of the refrigerating machine oil, are brought into a pump body, stay in a fit clearance of a rotating part, block a machine core and break down; when the magnitude of interference is small, the oil absorption piece and the eccentric shaft mounting hole generate relative motion under the impact of refrigerating machine oil, so that the oiling function of the oil absorption piece is invalid.

Further, when the distance between the end point of the spiral part of the oil suction piece and the center of the radial oil hole is set to be 2-10mm, the oil outlet of the radial oil hole is easy to generate discontinuity when the distance between the end point of the spiral part of the oil suction piece and the center of the radial oil hole is set to be less than 2mm, the distance is increased, and the strength of the eccentric shaft and the internal and external oil pressures of the radial oil hole are reduced.

Drawings

Fig. 1 is a schematic structural view of an oiling structure according to the present invention;

fig. 2 is a schematic view of the eccentric shaft structure of the present invention;

FIG. 3 is a schematic structural view of the main bearing of the present invention;

fig. 4 is a schematic view of a partial structure of the spiral oil groove of the present invention;

fig. 5 is a schematic structural diagram of a rotor compressor according to the present invention.

Wherein, 1 eccentric shaft, 2 main bearing, 3 oil suction piece, 4 compressor body, 5 oil storage device; 101 main shaft part, 102 eccentric part, 103 eccentric shaft center hole and 104 radial oil hole; 1031 mounting hole section, 1032 lift hole section; 201 a helical oil groove; 301 end point of the oil suction sheet spiral portion.

Detailed Description

In order to make the technical problem solved by the present invention, technical solution and beneficial effect are more clearly understood, and the following specific embodiments are right for the present invention to proceed further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in the attached drawings 1-4, the utility model provides an oiling structure for a compressor, which comprises an eccentric shaft 1, a main bearing 2 and an oil suction piece 3; the eccentric shaft 1 includes a main shaft portion 101 and an eccentric portion 102; a main bearing inner hole is formed in the center of the main bearing 2, and the eccentric shaft 1 penetrates through the main bearing inner hole; wherein the main bearing 2 is sleeved on the main shaft part 101; the center of the eccentric shaft 1 is provided with an eccentric shaft center hole 103, and the oil suction hole 3 is arranged in the eccentric shaft center hole 103.

In the utility model, the eccentric shaft center hole 103 is a concentric step hole; the eccentric center hole 103 comprises a mounting hole section 1031 and a lift hole section 1032, the mounting hole section 1031 is arranged close to the eccentric part 102 of the eccentric shaft 1, and the lift hole section 1032 is arranged at the main shaft part 101 of the eccentric shaft 1; preferably, the ratio of the diameter D of the mounting hole section 1031 to the diameter D of the head hole section 1032 is 1.3-1.8; the oil level of the refrigerator oil rises gradually along with the increase of the ratio, and when the ratio is 1.3-1.8, the lubrication of a main bearing in 10HZ low-frequency operation, the sealing of an oil groove and the 120HZ high-frequency operation can be balanced, so that the oil output of the compressor is large.

The oil absorption sheet 3 is installed in the installation hole section 1031; preferably, the oil absorption piece 3 is installed in the installation hole section 1032 in an interference fit manner, so that no relative movement between the oil absorption piece and the eccentric shaft is ensured, and the synchronous rotation between the eccentric shaft and the oil absorption piece is realized; preferably, the interference between the oil absorption sheet 3 and the mounting hole section 1032 is 0.1-0.3 mm; when the magnitude of interference is big, installation oil absorption piece in-process, the mounting hole easily produces the turn-ups burr, drops under the high-speed impact of refrigerator oil, brings the pump body into, stops in rotary part's fit clearance, and the stifled core that changes a position breaks down. The interference magnitude is small, and the oil absorption piece and the eccentric shaft mounting hole generate relative motion under the impact of refrigerating machine oil, so that the oiling function of the oil absorption piece is invalid.

A radial oil hole 104 is formed in the eccentric shaft 1, and the radial oil hole 104 is located on the hole wall of the mounting hole section 1031 and is arranged close to the eccentric part 102 of the eccentric shaft 1; one end of the radial oil hole 104 is communicated with the eccentric shaft center hole 103, and the other end is communicated with the main bearing inner hole.

In the utility model, a spiral oil groove 201 is arranged on the hole wall of the main bearing inner hole, and the spiral oil groove 201 runs through the main bearing inner hole along the axial direction; the oil absorption sheet 3 is a spiral oil absorption sheet; a spiral part end point 301 of the oil absorbing sheet 3 is arranged near one end of the head hole section 1032, and the spiral part end point 301 is positioned above the radial oil hole; preferably, the distance between the spiral part end point 301 of the oil absorption sheet 3 and the center of the radial oil hole 104 is 2-10 mm; when the distance between the spiral end point of the oil suction piece and the center of the radial oil hole is set to be less than 2mm, the low-frequency 10HZ operation is performed, the problem of discontinuity of oil outlet of the radial oil hole is easily caused, the distance is increased, and the strength of the eccentric shaft and the internal and external oil pressures of the radial oil hole are reduced; the spiral starting point of the spiral oil groove 201 is arranged close to the lower end face of the main bearing 2, and the spiral starting point of the spiral oil groove 201 is positioned below the center of the radial oil hole 104; preferably, a distance between a spiral start point of the spiral oil groove 201 and a center of the radial oil hole 104 is 1 to 3 mm.

In this embodiment, the spiral direction of the oil absorption sheet 3 is opposite to the spiral direction of the spiral oil groove 201; the ratio of the spiral lift S of the oil absorption sheet 3 to the spiral lift S of the spiral oil groove 201 is 0.3-0.7; under the condition that the spiral lift S of the oil groove of the main bearing is not changed, along with the increase of the ratio of the spiral lift S of the oil absorption sheet to the spiral lift S of the spiral oil groove, when the compressor operates at a low frequency of 10HZ, the oil level of the refrigerating machine rises at the highest position gradually, and when the ratio of the spiral lift S of the oil absorption sheet to the spiral lift S of the spiral oil groove is between 0.3 and 0.7, the lubrication of the low-frequency main bearing can be met; meanwhile, when the compressor operates at high frequency 120HZ, the flow of the refrigerating machine oil is increased along with the increase of the ratio of the spiral lift S of the oil absorption sheet to the spiral lift S of the spiral oil groove, so that the lubrication of a main bearing is met, when the ratio is more than 0.7, the oil output of the compressor is increased steeply, and the height of an oil pool at the bottom of the compressor is reduced.

The ratio of the cross-sectional area a of the spiral oil groove 201 to the area a of the radial oil hole 104 is 0.4-0.6; under the condition that the area A of the radial oil hole is not changed, along with the increase of the ratio, when the low-frequency 10HZ runs, the oil level of the refrigerating machine gradually descends to the highest position, the oil level of the refrigerating machine descends to the spiral oil groove of the main bearing without the sealing of the refrigerating machine oil, gas leakage is generated, and the low-frequency volumetric efficiency of the compressor is sharply reduced; when the ratio is between 0.4 and 0.6, oil can be stored in the oil groove of the main bearing to be sealed.

As shown in fig. 5, the utility model also provides a rotor compressor, which comprises a compressor body 4 and an oil storage device 5; the compressor body 4 comprises the oiling structure for the compressor; in the rotor compressor, a main bearing is arranged in a bearing hole of a main bearing seat, and a secondary bearing is arranged in a bearing hole of a secondary bearing seat; the bottom of the shell of the compressor body 4 is an oil pool part of the compressor, the oil pool part of the compressor is filled with refrigerating machine oil with a preset volume, and when the compressor runs, the lowest oil level position of the refrigerating machine oil is not lower than the lower end surface of the auxiliary bearing seat; the motor rotor is installed through the hot pressing technology in the afterbody of base bearing, and the base bearing on the eccentric shaft is rotatory under the drive of motor, drives eccentric rotor and hugs closely the cylinder inner wall and revolve, and the gleitbretter divides crescent space into low pressure side and high-pressure side, along with the roll of rotor, causes high, low pressure crescent space volume periodic variation, accomplishes compression and exhaust process when just accomplishing once breathing in every round of rotation.

The utility model discloses an oil structure and rotor compressor for compressor, the center of base bearing sets up the base bearing hole, be provided with the spiral oil groove that vertically runs through on the pore wall of base bearing hole; the center of the eccentric shaft is provided with an eccentric shaft center hole which is a concentric step hole and comprises a mounting hole section and a lift hole section; the mounting hole section and the lift hole section are concentrically arranged, and the bottom of the mounting hole section is communicated with the bottom of the mounting hole section; the oil absorption sheet is arranged in the mounting hole section in an interference fit mode; the eccentric shaft is provided with a radial oil hole which is close to the eccentric part of the eccentric shaft; one end of the radial oil hole is communicated with the eccentric shaft center hole, and the other end of the radial oil hole is communicated with the main bearing inner hole; in the rotation process of the compressor, the oiling structure is arranged, so that lubricating oil supply for an inner hole and an end face of the main bearing is mainly provided; the oiling structure of the utility model is suitable for a rolling rotor type variable frequency compressor, and can effectively reduce the friction power consumption of the main bearing when the compressor operates at high frequency; meanwhile, the oil level height of the refrigerating machine oil in the oil suction hole during low-frequency operation of the compressor can be effectively increased;

the working principle is as follows:

a structure of oiling for compressor, through set up the oil absorption piece in the eccentric shaft centre bore, under the drive of motor, the oil absorption piece is rotatory, realizes the refrigerator oil of compressor housing bottom, upwards transports to radial oilhole outflow from the bottom, refrigerator oil gradually climbs along the inside spiral oil groove of main bearing hole afterwards, until reacing the main bearing top to accomplish the lubrication of whole main bearing hole face.

In the utility model, the matching of the oil absorption piece and the eccentric shaft center hole is interference fit without relative movement, thereby realizing the synchronous rotation of the oil absorption piece when the main shaft rotates; the oil groove molded surfaces of the oil absorption sheet and the spiral oil groove are both in spiral structures, and the rotation directions of the two spiral structures are opposite; after the oil absorption piece is installed, the end point of the spiral part of the oil absorption piece is 2-10mm higher than the center of the radial oil hole; after the main shaft part of the eccentric shaft and the main bearing are installed, the height of the initial point of the spiral oil groove of the inner hole of the main bearing is 1-3mm lower than the central position of the radial oil hole.

In the utility model, the flow area ratio of the oil circuit in the eccentric shaft, the main bearing and the oil absorption sheet is determined, the relative position of each section of oil circuit interface part is specifically limited, the full-frequency oil applying efficiency of the vertical rolling rotor compressor can be well solved, and the position farthest from an oil pool is ensured; meanwhile, the lubrication of the power output main bearing of the compressor is realized; under the condition that the operation range of the existing variable frequency compressor is continuously widened, when the low-frequency 10HZ operates, the oil level of the refrigerating machine can be ensured to reach the main bearing, and meanwhile, the refrigerant leakage passing through the oil groove is effectively sealed; when the high-frequency 120HZ runs, the friction heat of the main bearing can be taken away in time, the temperature of the main bearing is reduced, and meanwhile, an enough main shaft oil level is established to ensure reliable lubrication; the variable-frequency vertical rotor compressor is suitable for a variable-frequency vertical rotor compressor which takes R32/R410a as working media.

When the main shaft part of the eccentric shaft rotates under the driving of a motor, the oil absorption piece penetrating into the oil pool disturbs engine oil, and the refrigerating engine oil spirally rises in the central hole of the eccentric shaft along the surface of the oil absorption piece and reaches the radial oil hole on the main bearing to be discharged; when the end point of the spiral part of the oil absorption piece is 2-10mm higher than the center of the radial oil hole, the central hole is oiled continuously and stably at a lower rotating speed.

The spiral oil groove is of a spiral groove structure with a preset depth arranged on the wall surface of the hole wall of the inner hole of the main bearing, taking a variable frequency compressor for 35-hanging R32 working medium as an example, when the compressor respectively runs under a rated heating working condition of 80HZ, the power consumption is low by 5-15 w; when the intermediate refrigeration 10HZ runs, the refrigeration amount is 4-8W.

In the utility model, when the initial position of the spiral oil groove is 1-3mm lower than the center of the radial oil hole, the refrigerating machine oil flowing out of the radial oil hole can directly flow into the spiral oil groove and rise along the oil groove until reaching the top end of the main bearing; the refrigerating machine oil flowing in the spiral oil groove forms an oil film in a gap between the main bearing and the bearing seat on one hand, so that the friction coefficient between the main bearing and the bearing seat is reduced, and on the other hand, heat generated by relative motion between the main bearing and the bearing seat is taken away in time.

The oil applying structure for the compressor and the rotor type compressor can ensure that the full frequency band of the vertical rolling rotor compressor can be effectively applied with oil by optimizing the oil path structure and parameters from the oil pool to the main bearing and determining the relative relation between the end point of the spiral part of the oil absorption sheet and the radial oil hole and the initial point of the radial oil hole and the spiral oil groove; the main bearing is used as a part farthest from an oil pool at the bottom of the shell in the vertical compressor and is also used as a part for outputting power of the compressor, and the main bearing is effectively lubricated and is very important for the reliability of the compressor; the oil circuit parameters determined by the utility model can ensure that the low-frequency running cold quantity is high and the high-frequency running power is low in the full-frequency-band running process of the compressor; the utility model is suitable for an use the variable frequency compressor of R32/R410a as refrigerant working medium, main bearing local heating volume when avoiding high frequency operation is big, causes the temperature sharply to rise, produces the trouble of embracing the axle.

The above embodiment is only one of the embodiments that can realize the technical solution of the present invention, and the scope of the present invention is not limited only by the embodiment, but also includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention.

Claims (10)

1. An oiling structure for a compressor is characterized by comprising an eccentric shaft (1), a main bearing (2) and an oil suction piece (3); a main bearing inner hole is formed in the center of the main bearing (2), and the eccentric shaft (1) penetrates through the main bearing inner hole;

an eccentric shaft center hole (103) is formed in the center of the eccentric shaft (1), and the oil absorption piece (3) is installed in the eccentric shaft center hole (103); the oil absorption sheet (3) is a spiral oil absorption sheet; a spiral oil groove (201) is formed in the hole wall of the main bearing inner hole, and the spiral oil groove (201) penetrates through the main bearing inner hole in the axial direction;

a radial oil hole (104) is formed in the eccentric shaft (1), one end of the radial oil hole (104) is communicated with the eccentric shaft center hole (103), and the other end of the radial oil hole (104) is communicated with the main bearing inner hole; the end point (301) of the spiral part of the oil suction sheet (3) is positioned above the radial oil hole (104); the spiral starting point of the spiral oil groove (201) is positioned below the center of the radial oil hole (104).

2. An oiling structure for compressor in accordance with claim 1, wherein the ratio of the screw lift S of the oil sucking sheet (3) to the screw lift S of the oil groove (201) is 0.3-0.7.

3. An oiling structure for compressor in accordance with claim 1, wherein the ratio of the cross sectional area a of the spiral oil groove (201) to the area a of the radial oil hole (104) is 0.4-0.6.

4. Oiling structure for compressor according to claim 1, wherein the spiral direction of the oil suction sheet (3) is opposite to the spiral direction of the spiral oil groove (201).

5. Oiling structure for compressor in accordance with claim 1, wherein the eccentric shaft center hole (103) is concentric step hole, the eccentric shaft center hole (103) comprises mounting hole section (1031) and lift hole section (1032); the mounting hole section (1031) is arranged close to the eccentric part (102) of the eccentric shaft (1), and the head hole section (1032) is arranged at the main shaft part (101) of the eccentric shaft (1);

the diameter of the mounting hole section (1031) is larger than the diameter of the head hole section (1032); the oil absorption sheet (3) is installed in the installation hole section (1031); the radial oil hole (104) is arranged on the hole wall of the mounting hole section (1031) and is close to the eccentric part (102) of the eccentric shaft (1).

6. Oiling structure for compressor in accordance with claim 5, wherein the ratio of diameter D of the mounting hole section (1031) to diameter D of the head hole section (1032) is 1.3-1.8.

7. Oiling structure for compressor, according to claim 5, characterized in that the oil suction sheet (3) is mounted in the mounting hole section (1031) with interference fit.

8. Oiling structure for compressor, according to claim 7, characterized in that the interference between the oil suction sheet (3) and the mounting hole section (1031) is 0.1-0.3 mm.

9. An oiling structure for compressor in accordance with claim 1, wherein the distance between the end point (301) of the spiral part of the oil suction sheet (3) and the center of the radial oil hole (104) is 2-10 mm.

10. A rotary compressor, characterized by comprising an oiling structure for compressors according to any of claims 1 to 9.

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