CN206234122U - Scroll compression machine oil loop structure - Google Patents

Abstract

The utility model provides an oil circulation structure of a scroll compressor, which comprises a cylinder body and a main shaft located inside the cylinder body, the space between the cylinder body and the main shaft forms an oil storage chamber of the cylinder body, and the inside of the main shaft is provided with Extended central hole, the end of the central hole communicates with the oil storage chamber of the cylinder body through the oil guide hole, and at least one oil injection hole extending to the outside of the main shaft is provided on the peripheral surface of the central hole. The oil circulation structure of the scroll compressor of the utility model improves the structure of the main shaft, reduces the weight of the compressor, changes the oil circulation mode of the compressor, realizes the oil circulation of the whole compressor, and makes the movable scroll and static scroll The disk is lubricated throughout the week, which improves the service life of the compressor.

Description

Scroll compressor oil circulation structure

technical field

The utility model relates to an oil circulation structure of a scroll compressor.

Background technique

It can be seen from Figures 1 to 2 that the main shaft 2 of the scroll compressor drives the movable scroll 5 to revolve around the center of the base circle of the fixed scroll 6, and the orbital radius is such that the scroll teeth of the movable scroll 5 and the fixed scroll 6 can mesh radius of gyration. In the existing scroll compressor, the low-pressure gas is sucked into the compression chamber between the movable scroll 5 and the fixed scroll 6 through the air inlet, and the fixed scroll 6 and the movable scroll 5 operate to compress the gas, and finally the high-pressure oil-containing gas The exhaust port 62 of the static scroll 6 is discharged into the back cover 7, and the oil and gas separator of the back cover 7 separates the oil and gas, and the high-pressure gas is discharged through the exhaust port of the back cover, and the separated oil is compressed by the capillary 61 of the static disc. Into the cylinder body oil storage chamber 3, after the cylinder body oil storage chamber 3 is full of oil, it flows back to the back cover 7 through the static disc oil return hole 63, so that the oil on one side of the compressor working chamber (scroll side) is continuously circulated. Therefore, the cylinder oil circulation passage 11 at the end of the cylinder 1 includes a cylinder oil circulation inlet 15 and a cylinder oil circulation outlet 16, the cylinder oil circulation inlet 15 communicates with the static disk capillary 61, and the cylinder oil circulation outlet 16 It communicates with the oil return hole 63 of the static plate.

In the oil circulation process of this type of scroll compressor, only the oil circulation on the scroll side of the compressor is realized, and affected by gravity, the oil is always deposited below the horizontal centerline of the compressor, and the part of the scroll above the horizontal centerline Failure to lubricate well will have a great impact on the life of the compressor.

Utility model content

In order to solve the technical problem that the oil of the existing scroll compressor is always deposited below the horizontal center line of the compressor, an oil circulation structure of the scroll compressor is provided.

The utility model provides a scroll compressor oil circulation structure, which comprises a cylinder body and a main shaft located inside the cylinder body, the space between the cylinder body and the main shaft forms the oil storage chamber of the cylinder body, and the interior of the main shaft is provided with Extended central hole, the end of the central hole communicates with the cylinder oil storage cavity through the oil guide hole, and at least one oil injection hole extending to the outside of the main shaft is provided on the peripheral surface of the central hole.

After the cylinder oil storage chamber is full of oil, it enters the center hole through the oil guide hole. When the compressor is running normally, the main shaft rotates at high speed, and the oil in the center hole will be evenly thrown out from the oil injection hole in the form of oil mist. The low-pressure gas is sucked into the compression chamber between the fixed scroll and the movable scroll, and then discharged after being compressed. In this way, the oil circulation of the compressor is realized, and the oil return to the fixed scroll is uniform, and the entire circumference of the fixed scroll and the movable scroll All have been effectively lubricated, reducing the failure of the compressor and prolonging the life of the compressor. The main shaft has a central hole, and the hollow design of the main shaft reduces the weight of the main shaft as much as possible while ensuring the strength of the main shaft.

Preferably, the scroll compressor further includes an eccentric bushing sleeved on the end of the main shaft, and the end of the oil guide hole communicating with the oil storage chamber of the cylinder is located at the end of the main shaft sleeve with the eccentric bushing. The position design of the oil guide hole ensures that the oil returns to the fixed scroll evenly, and the entire circumference of the fixed scroll and the movable scroll are effectively lubricated.

Further preferably, the scroll compressor also includes a movable scroll sleeved on the eccentric shaft sleeve, a fixed scroll fixed in the cylinder body and matched with the movable scroll, and a rear cover at the end of the cylinder body, the rear cover faces One side of the static scroll is provided with a rear cover oil storage chamber, and the side of the cylinder body facing the static scroll is provided with a cylinder oil circulation channel, and the static scroll is provided with a static disk capillary, which connects the rear cover oil storage chamber The body oil circulation channel is connected, and the cylinder oil circulation channel is connected with the cylinder oil storage chamber. The oil in the oil storage chamber of the rear cover passes through the capillary tube of the static plate and the oil circulation channel of the cylinder body to the oil storage chamber of the cylinder body. After the oil storage chamber of the cylinder body is full of oil, it enters the center hole through the oil guide hole. When the compressor is operating normally, the main shaft With high-speed rotation, the oil in the center hole will be evenly thrown out from the oil injection hole in the form of oil mist, and the oil mist and low-pressure gas will be sucked into the compression chamber between the fixed scroll and the movable scroll for compression and then discharged.

Further preferably, the cylinder oil circulation passage includes a main circulation passage directly connecting the capillary tube of the static plate and the cylinder oil storage chamber, an annular balance groove communicating with the main circulation passage, and a ring connecting the annular balance groove with the cylinder oil storage chamber. A plurality of branch line circulation channels, an annular balance groove forms a ring around the circumference of the main shaft, and a plurality of branch line circulation channels are distributed around the circumference of the main shaft. In addition to the main circulation channel, there are also annular balance grooves and branch line circulation channels distributed around the main shaft, so that oil can enter the cylinder oil storage chamber from multiple directions around the main shaft.

Further preferably, the back cover is provided with an oil-gas separator, the back cover is provided with a back cover exhaust port, the oil-gas separator communicates with the fixed scroll exhaust port of the fixed scroll, and the air outlet pipe of the oil-gas separator passes through the back cover The exhaust port communicates with the outside, and the oil return pipe of the oil-gas separator communicates with the oil storage chamber of the rear cover. The separated high-pressure gas is discharged through the exhaust port of the rear cover, and the separated oil flows back into the oil storage chamber of the cylinder body through the oil storage chamber of the rear cover, the capillary tube of the static plate, and the oil circulation channel of the cylinder body, realizing the recycling of the oil.

Preferably, the two ends of the main shaft are covered with front bearings and rear bearings. The front bearing is located at the end of the main shaft with oil guide holes. The hole is located between the rotor and the front bearing. The oil circulation of the above-mentioned scroll compressor is not limited to the working chamber. Through the selection of the position of the oil injection hole, the oil circulation in a large area is realized.

Preferably, the oil injection hole extends radially of the main shaft, so as to ensure uniform oil return to the fixed scroll and the entire periphery of the fixed scroll and the movable scroll to be effectively lubricated.

Preferably, the diameter of the oil injection hole is greater than or equal to 0.2 mm, which ensures that the oil return to the fixed scroll is uniform, and the entire circumference of the fixed scroll and the movable scroll are effectively lubricated.

Preferably, the oil guide hole extends along the axial direction of the main shaft to ensure uniform oil return from the fixed scroll and the entire periphery of the fixed scroll and the movable scroll are effectively lubricated.

On the basis of conforming to common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain the preferred examples of the present utility model.

The positive progressive effect of the present utility model is:

The oil circulation structure of the scroll compressor of the utility model improves the structure of the main shaft, reduces the weight of the compressor, changes the oil circulation mode of the compressor, realizes the oil circulation of the whole compressor, and makes the movable scroll and static scroll The disk is lubricated throughout the week, which improves the service life of the compressor.

Description of drawings

Fig. 1 is a structural schematic diagram of an existing scroll compressor oil circulation structure.

Fig. 2 is a left side view of the oil circulation structure of the scroll compressor shown in Fig. 1 after removing the rear cover, the movable scroll and the fixed scroll.

Fig. 3 is a structural schematic diagram of the oil circulation structure of the scroll compressor of the present invention.

Fig. 4 is a left side view of the oil circulation structure of the scroll compressor shown in Fig. 3 after removing the rear cover, the movable scroll and the fixed scroll.

Fig. 5 is a structural schematic diagram of the main shaft of the oil circulation structure of the scroll compressor shown in Fig. 3 .

Fig. 6 is a left side view of the main shaft of the scroll compressor oil circulation structure shown in Fig. 5 .

Fig. 7 is an A-A sectional view of the main shaft of the scroll compressor oil circulation structure shown in Fig. 6 .

Fig. 8 is a B-B sectional view of the main shaft of the scroll compressor oil circulation structure shown in Fig. 5 .

Explanation of reference signs

1 cylinder

11 Cylinder block oil circulation channel

12 main loop channels

13 Ring balance groove

14 branch circulation channels

15 Cylinder block oil circulation inlet

16 Cylinder block oil circulation outlet

2 spindles

21 center hole

22 Oil hole

23 Injection hole

3 Cylinder block oil storage chamber

4 Eccentric bushing

5 orbiting scroll

6 fixed scroll

61 static disk capillary

62 Fixed scroll exhaust port

63 Static disc oil return hole

7 back cover

71 Rear cover oil storage chamber

8 front bearing

9 rear bearing

10 rotors

20 stator

detailed description

The utility model is further illustrated below by means of examples, but the utility model is not limited to the scope of the examples.

As shown in Figures 3 to 8, the utility model provides a scroll compressor oil circulation structure, which includes a cylinder body 1 and a main shaft 2 located inside the cylinder body 1, and the space between the cylinder body 1 and the main shaft 2 forms a cylinder Body oil storage chamber 3, the interior of the main shaft 2 is provided with a central hole 21 extending axially, the end of the central hole 21 communicates with the cylinder oil storage chamber 3 through the oil guide hole 22, and the peripheral surface of the central hole 21 is also At least one oil spray hole 23 extending to the outside of the main shaft 2 is provided.

After the cylinder oil storage chamber 3 is full of oil, it enters the center hole 21 through the oil guide hole 22. When the compressor is operating normally, the main shaft 2 rotates at a high speed, and the oil in the center hole 21 will be evenly sprayed from the oil injection hole 23 into an oil mist. out, the oil mist is sucked into the compression chamber between the fixed scroll 6 and the movable scroll 5 together with the low-pressure gas to be compressed and then discharged. The whole circumference of scroll 6 and movable scroll 5 has been effectively lubricated, which reduces the failure of the compressor and prolongs the life of the compressor. The main shaft 2 is provided with a central hole 21, and the hollow design of the main shaft 2 reduces the weight of the main shaft 2 as much as possible while ensuring the strength of the main shaft 2.

In order to ensure that the oil return of the fixed scroll 6 is uniform and the entire circumference of the fixed scroll 6 and the movable scroll 5 are effectively lubricated, the oil injection hole 23 is preferably designed to extend radially along the main shaft 2, and the diameter of the oil injection hole 23 Preferably ≥0.2 mm, the oil guide hole 22 is preferably designed to extend along the axial direction of the main shaft 2 . As shown in FIGS. 7 to 8 , there are four oil injection holes 23 , which are located on the same radial plane of the main shaft 2 and evenly distributed along the circumferential direction of the main shaft 2 .

As shown in Figure 3, the two ends of the main shaft 2 are covered with a front bearing 8 and a rear bearing 9, the front bearing 8 is located at one end of the main shaft 2 provided with an oil guide hole 22, and the front bearing 8 and the rear bearing 9 support the main shaft 2 on the cylinder body 1, the middle part of the main shaft 2 is also covered with a rotor 10 that cooperates with the stator 20, and the oil injection hole 23 is located between the rotor 10 and the front bearing 8. It can be seen that the oil circulation of the scroll compressor described in the present utility model is not limited to the working chamber (scroll side), and the oil circulation in a large area is realized through the selection of the position of the oil injection hole 23, as shown in Figure 3 The oil injection hole 23 is located between the rotor 10 and the front bearing 8. In fact, the oil injection hole 23 can also be provided at other positions according to actual needs, so as to realize the oil circulation of a large area of the whole machine.

As shown in Figure 3, the scroll compressor also includes an eccentric bushing 4 sleeved on the end of the main shaft 2, and the end of the oil guide hole 22 communicating with the cylinder oil storage chamber 3 is located at the end of the main shaft 2 with the eccentric bushing 4 department. The position design of the oil guide hole 22 ensures that the fixed scroll 6 returns oil evenly, and the entire circumference of the fixed scroll 6 and the movable scroll 5 are effectively lubricated.

The scroll compressor also includes a movable scroll 5 sleeved on the eccentric shaft sleeve 4, a static scroll 6 fixed in the cylinder body 1 and matched with the movable scroll 5, and a rear cover 7 located at the end of the cylinder body 1, The side of the rear cover 7 facing the fixed scroll 6 is provided with a rear cover oil storage cavity 71, the side of the cylinder body 1 facing the fixed scroll 6 is provided with a cylinder oil circulation passage 11, and the fixed scroll 6 is provided with a capillary 61 for the static disk. The static plate capillary 61 communicates the rear cover oil storage chamber 71 with the cylinder oil circulation passage 11 , and the cylinder oil circulation passage 11 communicates with the cylinder oil storage chamber 3 .

The oil in the oil storage chamber 71 of the rear cover passes through the static plate capillary 61 and the cylinder oil circulation passage 11 to the cylinder oil storage chamber 3. After the cylinder oil storage chamber 3 is full of oil, it enters the central hole 21 through the oil guide hole 22. When the compressor is running normally, the main shaft 2 rotates at high speed, and the oil in the center hole 21 will be evenly thrown out from the oil injection hole 23 in the form of oil mist, and the oil mist will be sucked into the space between the fixed scroll 6 and the movable scroll 5 together with the low-pressure gas. The compression chamber between them is compressed and then discharged.

As shown in Figure 4, the cylinder oil circulation passage 11 includes a main circulation passage 12 directly connecting the static plate capillary 61 and the cylinder oil storage chamber 3, an annular balance groove 13 communicating with the main circulation passage 12, and an annular balance groove 13 A plurality of branch line circulation channels 14 communicated with the cylinder oil storage chamber 3 and an annular balance groove 13 form a ring around the circumference of the main shaft 2 , and a plurality of branch line circulation channels 14 are distributed around the circumference of the main shaft 2 . In addition to the main circulation channel 12, there are also annular balance grooves 13 and branch line circulation channels 14 distributed around the circumference of the main shaft 2, allowing oil to enter the cylinder oil storage chamber 3 from multiple directions around the main shaft 2.

As shown in Figure 3, the back cover 7 is provided with an oil-gas separator, and the back cover 7 is provided with a back cover exhaust port, and the oil-air separator communicates with the fixed scroll exhaust port 62 of the fixed scroll 6, and the oil-gas separator The air outlet pipe of the air outlet communicates with the outside through the rear cover exhaust port, and the oil return pipe of the oil-gas separator communicates with the rear cover oil storage chamber 71. The high-pressure oil-containing gas compressed by the fixed scroll 6 and the movable scroll 5 is discharged into the oil-gas separator through the fixed scroll exhaust port 62 of the fixed scroll 6, and the separated high-pressure gas is discharged through the exhaust port of the rear cover, and The separated oil flows back into the cylinder oil storage chamber 3 through the rear cover oil storage chamber 71, the static plate capillary 61, and the cylinder oil circulation passage 11, thereby realizing the recycling of the oil.

To sum up, the oil circulation structure of the scroll compressor of the utility model improves the structure of the main shaft, reduces the weight of the compressor, changes the oil circulation mode of the compressor, realizes the oil circulation of the whole compressor, and makes the dynamic The scroll and fixed scroll are lubricated all the way, which improves the service life of the compressor.

The utility model is not limited to the above-mentioned embodiments, and no matter any changes are made in its shape or structure, all fall within the protection scope of the utility model. The protection scope of the utility model is defined by the appended claims, and those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the utility model, but these Changes and modifications all fall within the protection scope of the present utility model.

Claims (9)

1. A scroll compressor oil circulation structure, which comprises a cylinder body (1) and a main shaft (2) positioned at the inside of the cylinder body (1), between the cylinder body (1) and the main shaft (2) The space between them forms the oil storage cavity (3) of the cylinder body, which is characterized in that: the inside of the main shaft (2) is provided with a central hole (21) extending in the axial direction, and the end of the central hole (21) passes through the guide The oil hole (22) communicates with the cylinder oil storage cavity (3), and at least one oil injection hole ( twenty three). 2. The scroll compressor oil circulation structure according to claim 1, characterized in that: the oil circulation structure further comprises an eccentric bushing (4) sleeved on the end of the main shaft (2), and the guide One end of the oil hole (22) communicating with the cylinder oil storage chamber (3) is located at the end of the main shaft (2) covered with the eccentric bushing (4). 3. The oil circulation structure of the scroll compressor according to claim 2, characterized in that: the oil circulation structure also includes a movable scroll (5) sleeved on the eccentric sleeve (4), fixed on the The fixed scroll (6) in the cylinder (1) and matched with the movable scroll (5), the rear cover (7) at the end of the cylinder (1), the rear cover (7 ) is provided with a rear cover oil storage cavity (71) on the side facing the fixed scroll (6), and a cylinder oil circulation passage (11) is provided on the side facing the fixed scroll (6) of the cylinder (1) ), the static scroll (6) is provided with a static disk capillary (61), and the static disk capillary (61) connects the rear cover oil storage cavity (71) with the cylinder oil circulation channel (11) The cylinder oil circulation channel (11) communicates with the cylinder oil storage cavity (3). 4. The oil circulation structure of the scroll compressor according to claim 3, characterized in that: the cylinder oil circulation channel (11) includes a cylinder directly connected to the stationary plate capillary (61) and the cylinder oil storage chamber (3) the main circulation passage (12), the annular balance groove (13) communicated with the main circulation passage (12), and the annular balance groove (13) and the cylinder oil storage chamber (3) A plurality of branch line circulation passages (14) that are connected, the annular balance groove (13) forms a ring around the circumference of the main shaft (2), and a plurality of the branch line circulation passages (14) surround the main shaft (2) ) circumferential distribution. 5. The oil circulation structure of the scroll compressor according to claim 3, characterized in that: the rear cover (7) is provided with an oil-gas separator, and the rear cover (7) is provided with a rear cover exhaust port , the oil-gas separator communicates with the fixed scroll exhaust port (62) of the fixed scroll (6), and the air outlet pipe of the oil-gas separator communicates with the outside through the exhaust port of the rear cover, so The oil return pipe of the oil-gas separator communicates with the oil storage cavity (71) of the rear cover. 6. The oil circulation structure of the scroll compressor according to claim 1, characterized in that: the two ends of the main shaft (2) are covered with a front bearing (8) and a rear bearing (9), and the front bearing (8 ) is located at one end of the main shaft (2) provided with the oil guide hole (22), and the front bearing (8) and the rear bearing (9) support the main shaft (2) on the cylinder body (1) Inside, the middle part of the main shaft (2) is also covered with a rotor (10), and the oil injection hole (23) is located between the rotor (10) and the front bearing (8). 7. The oil circulation structure of a scroll compressor according to any one of claims 1 to 6, characterized in that: the oil injection hole (23) extends along the radial direction of the main shaft (2). 8. The oil circulation structure of a scroll compressor according to any one of claims 1 to 6, characterized in that: the diameter of the oil injection hole (23) is ≥0.2mm. 9. The oil circulation structure of a scroll compressor according to any one of claims 1 to 6, characterized in that the oil guide hole (22) extends along the axial direction of the main shaft (2).