Compressor structure

Abstract

The utility model provides a compressor structure. The compressor structure comprises a compressor shell, an oil groove, an oil gas barrel, a motor, a first mounting seat, at least one oil filter, a second mounting seat and at least one fine oil separator, the compressor shell is provided with a compression cavity. The compressor shell, the oil groove and the oil gas barrel are of an integrated casting forming structure. The motor and the first mounting base are arranged on the two opposite sides of the compressor shell correspondingly. The first mounting base is provided with an oil-gas flow channel, and the compression cavity communicates with the oil-gas barrel through the oil-gas flow channel. The oil filter is arranged on the first installation base and communicates with the compression cavity through the first installation base. And the second mounting seat is arranged on the oil gas barrel. And the oil fine separator is arranged on the second mounting seat and is communicated with the oil gas barrel through the second mounting seat. Therefore, the compressor structure provided by the utility model is beneficial to improving the oil gas separation effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor structure, especially a compressor structure with oil-gas separation design. BACKGROUND

[0002] Screw compressors can be divided into oil-injected screw compressors and oil-free screw compressors. Although oil-free screw compressors can provide completely oil-free gas, they have high requirements for gas quality, high maintenance difficulty and high cost, and therefore, the application of oil-free screw compressors is not as widespread as that of oil-injected screw compressors.

[0003] During the operation of an oil-injected screw compressor, lubricating oil is injected into the compression chamber to lubricate and cool the rotor in the compression chamber, thereby reducing the working temperature. First, the lubricating oil injected into the compression chamber mixes with the gas entering the compression chamber and is compressed by the rotor, and then the mixed fluid formed by the lubricating oil and the compressed gas is discharged from the compression chamber and enters the oil groove. When the mixed fluid enters the oil groove, the mixed fluid collides with the inner wall of the oil groove or other components in the oil groove to preliminarily separate the lubricating oil and the compressed gas, but the separation effect is generally poor, resulting in high oil content of the gas entering the system and increasing the consumption of lubricating oil. SUMMARY

[0004] The utility model provides a compressor structure, help to promote the effect of oil gas separation.

[0005] According to an embodiment of the utility model, the compressor structure comprises a compressor shell, an oil groove, an oil-gas bucket, a motor, a first mounting seat, at least one oil filter, a second mounting seat and at least one oil fine separator. The compressor shell has a compression chamber. The compressor shell, the oil groove and the oil-gas bucket are integrally cast into a structure. The motor and the first mounting seat are respectively arranged on opposite sides of the compressor shell. The first mounting seat has an oil-gas flow channel, and the compression chamber is communicated with the oil-gas bucket through the oil-gas flow channel. The oil filter is arranged on the first mounting seat and is communicated with the compression chamber through the first mounting seat. The second mounting seat is arranged on the oil-gas bucket. The oil fine separator is arranged on the second mounting seat and is communicated with the oil-gas bucket through the second mounting seat.

[0006] According to an embodiment of the utility model, the oil-gas bucket comprises a top portion and a bottom portion, the top portion has a top opening, the second mounting seat is arranged on the top portion and covers the top opening, the second mounting seat comprises an oil-gas separation cylinder, the oil-gas separation cylinder is inserted into the oil-gas bucket from the top opening and extends towards the bottom portion.

[0007] According to an embodiment of the utility model, an annular flow channel is formed between the inner wall surface of the oil-gas bucket and the outer wall surface of the oil-gas separation cylinder, and the oil-gas flow channel is communicated with the annular flow channel.

[0008] According to an embodiment of the present application, the oil-gas passage is communicated with the annular passage at a position close to the top opening, and the oil-gas separation cylinder has an oil-gas separation space surrounded by the annular passage, the oil-gas separation space having a bottom opening towards the bottom.

[0009] According to an embodiment of the present application, the oil fine separator is communicated with the oil-gas barrel through the oil-gas separation space.

[0010] According to an embodiment of the present application, the second mounting seat further comprises a barrel cover connected with the oil-gas separation cylinder, and the barrel cover covers the top opening, and the oil fine separator is arranged on the barrel cover, wherein the barrel cover has an oil-gas passage, and the oil fine separator is communicated with the oil-gas separation space through the oil-gas passage.

[0011] According to an embodiment of the present application, the oil-gas separation cylinder and the barrel cover are integrally formed by casting.

[0012] According to an embodiment of the present application, the oil-gas passage and the communication position form an inner passage, one end of the inner passage is communicated with the exhaust of the compression cavity, and the other end of the inner passage is communicated with the oil-gas barrel in the tangential direction of the outer wall surface of the oil-gas separation cylinder.

[0013] According to an embodiment of the present application, the first mounting seat comprises an oil filter seat and a bearing seat, and the oil filter seat and the bearing seat are integrally formed by casting, the oil filter is arranged on the oil filter seat and communicated with the compression cavity through the oil filter seat, and the first mounting seat further has a bearing mounting space separated from the oil-gas passage, and the oil-gas passage and the bearing mounting space are formed in the bearing seat.

[0014] According to an embodiment of the present application, further comprising: a first rotor coupled to the motor; a second rotor arranged in the compression cavity with the first rotor and mutually engaged; and a first bearing and a second bearing arranged in the bearing mounting space, wherein the end of the first rotor is inserted into the bearing mounting space, and the first bearing is sleeved on the end of the first rotor, the end of the second rotor is inserted into the bearing mounting space, and the second bearing is sleeved on the end of the second rotor, and the first mounting seat further comprises a bearing seat cover, wherein the bearing seat cover is arranged on the bearing seat and covers the bearing mounting space and the oil-gas passage. According to an embodiment of the present application, the oil filter seat has a first internal oil passage, and the compressor housing further has a second internal oil passage communicated with the compression cavity, the first internal oil passage is communicated with the second internal oil passage, and the oil filter is communicated with the compression cavity through the first internal oil passage and the second internal oil passage.

[0015] According to an embodiment of the present application, the oil groove is arranged below the compressor housing, and the oil-gas bucket is arranged opposite to the motor through the bearing seat.

[0016] According to an embodiment of the present application, the oil-gas flow channel extends along an arc-shaped path and has a first port communicated with the compression cavity and a second port communicated with the oil-gas bucket.

[0017] According to an embodiment of the present application, the second port and the first port have a height difference or no height difference in the gravity direction.

[0018] According to an embodiment of the present application, further comprising: a first external oil path, wherein the oil-gas bucket is communicated with an external cooler through the first external oil path; a second external oil path, wherein the external cooler is communicated with the motor through the second external oil path; a third external oil path, wherein the motor is communicated with the oil filter through the third external oil path; and at least one fourth external oil path, wherein the oil fine separator is communicated with the first mounting seat through the fourth external oil path.

[0019] According to an embodiment of the present application, the first mounting seat further has a bearing mounting space separated from the oil-gas flow channel, and the fourth external oil path is communicated with the bearing mounting space.

[0020] According to an embodiment of the present application, the motor comprises a motor housing, and the motor housing has a cooling flow channel, the external cooler is communicated with an input port of the cooling flow channel through the second external oil path, and an output port of the cooling flow channel is communicated with the oil filter through the third external oil path.

[0021] According to an embodiment of the present application, the oil groove is arranged below the compressor housing, and the oil-gas bucket is arranged at a side of the oil groove.

[0022] According to an embodiment of the present application, a lower half of an internal space of the oil-gas bucket is communicated with the oil groove.

[0023] According to an embodiment of the present application, further comprising: an external oil path, wherein the oil groove is communicated with an external cooler through the external oil path.

[0024] Based on the above, in the compressor structure of the utility model, the mixed fluid formed by the lubricating oil and the compressed gas is discharged from the compression chamber and then oil-gas separation is carried out in the oil-gas flow channel and the oil-gas bucket, so that most of the lubricating oil is separated from the compressed gas and then enters the oil groove and the oil-gas bucket for storage. Therefore, the compressor structure of the utility model not only can avoid the compressed gas with high oil content from entering the system, but also can reduce the consumption of the lubricating oil. On the other hand, the compressor shell, the oil groove and the oil-gas bucket are integrally cast into a structure, which can not only significantly improve the structural strength, reduce the assembly process, improve the manufacturing efficiency and reduce the manufacturing cost, but also improve the sealing performance to effectively reduce the oil-gas leakage phenomenon.

[0025] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following embodiments are described in detail below, and the drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0026] FIG. 1A With FIG. 1B is a schematic view of the compressor structure of an embodiment of the utility model in two different perspectives;

[0027] FIG. 1C is FIG. 1A a schematic view of the bearing seat cover disengaging the bearing seat;

[0028] FIG. 1D is FIG. 1C a partial enlarged schematic view of the bearing seat of in another perspective;

[0029] FIG. 1E is FIG. 1C a partial cross-sectional schematic view of ;

[0030] FIG. 1F is FIG. 1A a top view schematic view of the flow path of the compressor structure of ;

[0031] FIG. 2A is FIG. 1A a front view schematic view of the compressor structure of ;

[0032] FIG. 2B is FIG. 2A a cross-sectional schematic view along the line segment 2B-2B;

[0033] FIG. 2C is FIG. 2A a cross-sectional schematic view along the line segment 2C-2C;

[0034] FIG. 2D is a schematic view of the first rotor and the second rotor of removed FIG. 2C

[0035] FIG. 2E is FIG. 2A a cross-sectional schematic view along the line segment 2E-2E;​

[0036] FIG. 3 is a schematic view of the configuration of the oil groove and the external cooler of the compressor structure of another embodiment of the present application;

[0037] FIG. 4 is a schematic view of the compressor structure of yet another embodiment of the present application. DETAILED DESCRIPTION

[0038] Reference is made to FIG. 1A and FIG. 1B In the present embodiment, the compressor structure 100 comprises a compressor housing 110, an oil groove 120, an oil-gas bucket 130, a motor 140, a first mounting base 150, at least one oil filter 160, a second mounting base 170, and at least one oil fine separator 180. In detail, the compressor housing 110, the oil groove 120, and the oil-gas bucket 130 are integrally casted into a structure, which not only can significantly improve the structural strength, reduce the assembly process, improve the manufacturing efficiency, and reduce the manufacturing cost, but also can improve the sealing performance to effectively reduce the oil-gas leakage phenomenon. In addition, since the compressor housing 110, the oil groove 120, and the oil-gas bucket 130 are integrally casted, not only can the complex geometric modeling design be realized, but also the compactness of the structural configuration can be improved to reduce the volume.

[0039] As shown in FIG. 1A , FIG. 1B , FIG. 2A and FIG. 2B , the motor 140 and the first mounting base 150 are respectively arranged on opposite sides of the compressor housing 110, wherein the oil filter 160 is arranged on the first mounting base 150 and located outside the first mounting base 150. In addition, the second mounting base 170 is arranged on the oil-gas bucket 130, wherein the oil fine separator 180 is arranged on the second mounting base 170 and located outside the second mounting base 170. Based on the above mounting configuration, the compactness of the structural configuration can be improved to reduce the volume.

[0040] For example, the first mounting base 150 can be locked and fixed to the compressor housing 110 by bolts, screws, or other locking parts. In addition, the second mounting base 170 can be locked and fixed to the top 131 of the oil-gas bucket 130 by bolts, screws, or other locking parts.

[0041] As shown in FIG. 1B to FIG. 1DAs shown, the first mount 150 includes an oil filter seat 151 and a bearing seat 152, and the oil filter seat 151 and the bearing seat 152 are integrally cast into a structure, which not only can significantly improve the structural strength, reduce the assembly process, improve the manufacturing efficiency and reduce the manufacturing cost, but also can improve the sealing to effectively reduce the oil and gas leakage phenomenon. In addition, because the oil filter seat 151 and the bearing seat 152 are integrally cast, not only can the complex geometric modeling design be realized, but also the compactness of the structural configuration can be improved to reduce the volume.

[0042] As FIG. 1D , FIG. 1E , FIG. 2B and FIG. 2C In the present embodiment, the oil filter 160 is arranged on the oil filter seat 151, and the first mount 150 has an oil and gas flow channel 152a and a bearing mounting space 152b formed in the bearing seat 152. In detail, the oil and gas flow channel 152a and the bearing mounting space 152b are separated from each other, the oil and gas flow channel 152a extends along an arc-shaped path from the lower to the upper of the periphery of the bearing mounting space 152b to the oil and gas bucket 130, and the compression chamber 111 of the compressor housing 110 is communicated with the oil and gas bucket 130 through the oil and gas flow channel 152a.

[0043] The compressor structure 100 further includes a first rotor 101 and a second rotor 102 arranged in parallel in the compression chamber 111 and a first bearing 103 and a second bearing 104 arranged in parallel in the bearing mounting space 152b, wherein the first rotor 101 is coupled to the motor 140, and the first rotor 101 and the second rotor 102 can be two screw rods engaged with each other. On the other hand, the end 101a of the first rotor 101 is inserted into the bearing mounting space 152b, and the first bearing 103 is sleeved on the end 101a of the first rotor 101. The end 102a of the second rotor 102 is inserted into the bearing mounting space 152b, and the second bearing 104 is sleeved on the end 102a of the second rotor 102.

[0044] For example, the first rotor 101 and the second rotor 102 engaged with each other can be arranged horizontally left and right, but not limited thereto, the first rotor 101 and the second rotor 102 engaged with each other can also be arranged vertically up and down, or arranged with a height difference between the long axes (or rotation axes) of each other in the direction of gravity GD.

[0045] As FIG. 1A , FIG. 1C and FIG. 2CAs shown, the first mounting base 150 further comprises a bearing seat cover 153 arranged on the bearing seat 152 to cover or enclose the bearing mounting space 152b and the oil-gas flow channel 152a. For example, the bearing seat cover 153 can be locked and fixed on the bearing seat 152 by bolts, screws or other locking parts to cover or enclose the bearing mounting space 152b and the oil-gas flow channel 152a, which not only prevents oil leakage, foreign matter invasion or water vapor invasion, but also improves the convenience of cleaning, replacement or maintenance.

[0046] As shown in FIG. 1A , FIG. 1B and FIG. 1E , the oil groove 120 is arranged below the compressor housing 110, and the oil-gas bucket 130 is arranged at the side of the oil groove 120. In addition, the motor 140 and the first mounting base 150 are arranged at opposite sides of the compressor housing 110, respectively, and the oil-gas bucket 130 is in communication with the oil-gas flow channel 152a of the bearing seat 152 to be arranged opposite to the motor 140 through the bearing seat 152.

[0047] As shown in FIG. 1C , FIG. 2B , FIG. 2C and FIG. 2D , the oil filter 160 can be in communication with the compression cavity 111 through the first mounting base 150, specifically through the oil filter seat 151. In detail, the oil filter seat 151 has a first internal oil passage 151a, and the compressor housing 110 further has a second internal oil passage 112 in communication with the compression cavity 111. The first internal oil passage 151a is in communication with the second internal oil passage 112, and the oil filter 160 is in communication with the compression cavity 111 through the first internal oil passage 151a and the second internal oil passage 112. On the other hand, the compressor housing 110 further has a first oil injection hole 113 arranged corresponding to the first rotor 101 and a second oil injection hole 114 arranged corresponding to the second rotor 102, and the second internal oil passage 112 is in communication with the compression cavity 111 through the first oil injection hole 113 and the second oil injection hole 114.

[0048] Firstly, solid impurities in the lubricating oil can be filtered out by the oil filter 160, then the lubricating oil is transported from the oil filter 160 to the first internal oil passage 151a, and then transported from the first internal oil passage 151a to the second internal oil passage 112. Then, the lubricating oil is injected or sprayed into the compression cavity 111 from the second internal oil passage 112 through the first oil injection hole 113 and the second oil injection hole 114 to lubricate and cool the first rotor 101 and the second rotor 102.

[0049] For example, the hole axes of the first oil injection hole 113 and the second oil injection hole 114 are not perpendicular to the long axes or rotation axes of the first rotor 101 and the second rotor 102, but are inclined to the long axes or rotation axes of the first rotor 101 and the second rotor 102. Therefore, the design of injection or injection of lubricating oil into the compression chamber 111 is a design of oblique injection or oblique injection, so as to lubricate and cool the first rotor 101 and the second rotor 102 in a larger range.

[0050] As shown in FIG. 1A , FIG. 1E , FIG. 2C and FIG. 2E , the oil separator 180 can be connected to the oil-gas bucket 130 through the second mounting seat 170. In detail, the second mounting seat 170 includes an oil-gas separation cylinder 171 and a bucket cover 172 connected to the oil-gas separation cylinder 171, and the oil-gas separation cylinder 171 and the bucket cover 172 can be an integral structure. The top 131 of the oil-gas bucket 130 has a top opening 131a, wherein the second mounting seat 170 is arranged on the top 131 and covers or seals the top opening 131a, specifically the bucket cover 172 covers or seals the top opening 131a.

[0051] For example, the bucket cover 172 can be locked and fixed to the top 131 of the oil-gas bucket 130 by bolts, screws or other locking parts, so as to cover or seal the internal space of the oil-gas bucket 130, which not only prevents oil-gas leakage, foreign matter intrusion or water vapor intrusion, but also improves the convenience of cleaning, replacement or maintenance.

[0052] As shown in FIG. 1E , FIG. 2C and FIG. 2E , the oil-gas separation cylinder 171 is inserted into the oil-gas bucket 130 from the top opening 131a and extends to the bottom 132 of the oil-gas bucket 130. The oil-gas separation cylinder 171 is located in the upper half of the internal space of the oil-gas bucket 130, and an annular flow channel 10 is formed between the inner wall surface 133 of the oil-gas bucket 130 and the outer wall surface 1711 of the oil-gas separation cylinder 171 in the upper half of the internal space of the oil-gas bucket 130, and the oil-gas flow channel 152a is connected to the annular flow channel 10. In detail, the oil-gas separation cylinder 171 can be a hollow cylinder and has an oil-gas separation space 171a surrounded by the annular flow channel 10. The connection position 11 of the oil-gas flow channel 152a and the annular flow channel 10 is close to the top opening 131a, and the oil-gas separation space 171a has a bottom opening 1712 facing the bottom 132. That is, the oil-gas separation space 171a is connected to the internal space of the oil-gas bucket 130 and is also connected to the annular flow channel 10.

[0053] The oil fine separator 180 is disposed on the lid 172 and outside the lid 172. In addition, the lid 172 has an oil gas passage 1721, which is in communication with the oil gas separation space 171a. Therefore, the oil fine separator 180 can be in communication with the oil gas separation space 171a through the oil gas passage 1721, and in communication with the inner space of the oil gas cartridge 130 and the annular flow passage 10 through the oil gas separation space 171a.

[0054] As shown in FIG. 1, the oil gas cartridge 130 is disposed in the bearing mounting space 152b of the annular flow passage 10. The oil gas cartridge 130 has an oil gas separation space 171a, which is in communication with the oil gas passage 1721 of the lid 172. In addition, the oil gas cartridge 130 has an oil gas outlet 1722, which is in communication with the oil gas separation space 171a and the oil gas passage 1721. FIG. 1D 、 FIG. 1E 、 FIG. 2C and FIG. 2D As shown in FIG. 1, the oil gas cartridge 130 is disposed in the bearing mounting space 152b of the annular flow passage 10. The oil gas cartridge 130 has an oil gas separation space 171a, which is in communication with the oil gas passage 1721 of the lid 172. In addition, the oil gas cartridge 130 has an oil gas outlet 1722, which is in communication with the oil gas separation space 171a and the oil gas passage 1721.

[0055] In the present embodiment, the oil gas flow passage 152a has a first port 1521, which is in communication with the compression chamber 111, and a second port 1522, which is in communication with the oil gas cartridge 130. In the gravitational direction GD, the second port 1522 is higher than the first port 1521 by a height difference H. Therefore, in the process of the mixed fluid flowing from the first port 1521 to the second port 1522, the lubricating oil separated from the compressed gas can be affected by gravity and drop to the bottom of the oil gas flow passage 152a.

[0056] Specifically, in order to make the overall configuration of the compressor structure 100 more in line with the actual application requirements, when the top 131 of the oil-gas tank 130 is higher than the height of the first port 1521 of the compression chamber 111, the second port 1522 of the oil flow channel 152a is higher than the first port 1521 (that is, there is a height difference H between the second port 1522 and the first port 1521 in the direction of gravity GD), so that the mixed fluid formed by the lubricating oil and the compressed gas can enter the oil-gas tank 130 from bottom to top along the oil flow channel 152a after being discharged from the compression chamber 111. Furthermore, when the top 131 of the oil-gas tank 130 is not higher than the height of the first port 1521 of the compression chamber 111, the second port 1522 of the oil-gas passage 152a is at the same height as the first port 1521 (i.e., there is no height difference between the second port 1522 and the first port 1521 in the direction of gravity GD) or the second port 1522 of the oil-gas passage 152a is lower than the first port 1521, so that the mixed fluid formed by the lubricating oil and the compressed gas is discharged from the compression chamber 111 and smoothly enters the oil-gas tank 130 along the oil-gas passage 152a.

[0057] Next, as FIG. 1E , FIG. 2C and FIG. 2E As shown, the mixed fluid flows into the annular channel 10 from the second port 1522, and flows along a spiral path from the top 131 to the bottom 132 of the oil-gas tank 130 within the annular channel 10. This cyclone separation process separates most of the lubricating oil from the compressed gas, constituting the second oil-gas separation. Simultaneously, the lubricating oil drips to the bottom 132 of the oil-gas tank 130 under gravity. Since the oil-gas tank 130 is connected to the oil tank 120, the lubricating oil can be further recycled back to the oil tank 120.

[0058] like FIG. 1E and FIG. 2E As shown, after most of the lubricating oil is separated from the compressed gas, the compressed gas flows into the oil-gas separation space 171a from the bottom opening 1712, and then flows to the oil-gas separator 180 from the oil-gas inlet 1721. In detail, the oil-gas separator 180 can filter out the tiny oil droplets remaining in the compressed gas to prevent them from entering the system with the compressed gas; this is the third oil-gas separation.

[0059] like FIG. 1E As shown, the oil-gas separator 171 is located approximately in the upper half of the internal space of the oil-gas tank 130, and the lower half of the internal space of the oil-gas tank 130 is connected to the oil trough 120. This design helps to increase the oil storage capacity of the compressor structure 100. In addition, since the oil trough 120 is not directly connected to the oil flow channel 152a, the mixed fluid from the oil flow channel 152a does not directly enter the oil trough 120, but first undergoes oil-gas separation in the oil-gas tank 130 to improve the oil-gas separation effect.

[0060] likeFIG. 1D , FIG. 1E , FIG. 2C and FIG. 2E As shown, the bearing housing 152 and the oil-gas separator 130 are two connected castings, wherein the oil flow channel 152a is located in the bearing housing 152, and the connecting position 11 is located in the oil-gas separator 130. Furthermore, the oil flow channel 152a and the connecting position 11 can form an inner channel of the two castings, wherein one end of the inner channel (i.e., the first port 1521 of the oil flow channel 152a) is connected to the exhaust port of the compression chamber 111, and the other end of the inner channel (i.e., the connecting position 11) is connected to the oil-gas separator 130 in the tangential direction of the outer wall surface 1711 of the oil-gas separator 171.

[0061] like FIG. 1A , FIG. 1B , FIG. 1C and FIG. 1E As shown, in this embodiment, the oil trough 120 is disposed below the compressor housing 110, and the oil-gas separator 130 is disposed on the side of the oil trough 120. Based on this configuration, the extension path of the oil flow channel 152a connected to the oil-gas separator 130 is an arc-shaped path surrounding the bearing mounting space 152b, and the bearing mounting space 152b and this arc-shaped path can fall on the same plane in the space.

[0062] like FIG. 1B , FIG. 1E , FIG. 1F and FIG. 2C As shown, in this embodiment, the compressor structure 100 further includes a first external oil passage 190, a second external oil passage 191, a third external oil passage 192, and at least one fourth external oil passage 193. Specifically, the bottom 132 of the oil-gas separator 130 has a connecting port 134, wherein one end of the first external oil passage 190 is connected to the connecting port 134, and the other end of the first external oil passage 190 is connected to the external cooler 20. That is, the oil-gas separator 130 is connected to the external cooler 20 through the first external oil passage 190.

[0063] On the other hand, the motor 140 includes a motor housing 141, wherein the motor housing 141 has a cooling channel 141a, and the cooling channel 141a has a first channel opening 141b and a second channel opening 141c. Specifically, one end of the second external oil passage 191 is connected to the external cooler 20, and the other end of the second external oil passage 191 is connected to the first channel opening 141b. That is, the external cooler 20 is connected to the motor 140 through the second external oil passage 191, specifically to the cooling channel 141a of the motor housing 141.

[0064] In the present embodiment, the oil filter seat 151 has a communication port 151b, wherein one end of the third external oil passage 192 is connected to the second flow passage port 141c, and the other end of the third external oil passage 192 is connected to the communication port 151b. That is, the motor 140 is communicated to the oil filter 160 through the third external oil passage 192, specifically, the cooling flow passage 141a of the motor housing 141 is communicated to the oil filter 160 through the third external oil passage 192 and the oil filter seat 151.

[0065] Specifically, the first flow passage port 141b connected to the external cooler 20 can be the input port of the cooling flow passage 141a, and the second flow passage port 141c connected to the oil filter seat 151 can be the output port of the cooling flow passage 141a. In other examples, the external cooler 20 can be connected to the second flow passage port 141c, and the oil filter seat 151 can be connected to the first flow passage port 141b, so as to take the second flow passage port 141c as the input port and the first flow passage port 141b as the output port of the cooling flow passage 141a. That is, the input port and the output port of the cooling flow passage 141a can be arranged according to actual application requirements, without affecting the cooling effect of the motor 140.

[0066] As shown in FIG. 1B As shown in FIG. 1F In the present embodiment, the bearing mounting space 152b of the first mounting seat 150 is covered or closed by the bearing seat cover 153, and the bearing seat cover 153 has two communication ports 153a, 153b. On the other hand, the two oil separators 180 are arranged on the second mounting seat 170, and are communicated to the first mounting seat 150, specifically, to the bearing mounting space 152b, through the two fourth external oil passages 193, 193a.

[0067] Further, the oil separator 180 relatively close to the first mounting seat 150 has a communication port 181a, and the other oil separator 180 relatively far from the first mounting seat 150 has a communication port 181b. One end of the fourth external oil passage 193 is connected to the communication port 181a, and the other end of the fourth external oil passage 193 is connected to the communication port 153a relatively close to the two oil separators 180. In addition, one end of the fourth external oil passage 193a is connected to the communication port 181b, and the other end of the fourth external oil passage 193a is connected to the communication port 153b relatively far from the two oil separators 180.

[0068] As shown in FIG. 1B , FIG. 1E , FIG. 1F and FIG. 2CThe lubricating oil stored in the oil-gas barrel 130 can be delivered to the external cooler 20 through the first external oil passage 190 to perform the action of cooling. Then, the cooled lubricating oil can be delivered to the cooling flow passage 141a of the motor housing 141 through the second external oil passage 191 to cool the motor 140 to avoid the motor 140 from malfunctioning or being damaged due to high operating temperature.

[0069] Then, the lubricating oil in the cooling flow passage 141a can be delivered to the oil filter 160 through the third external oil passage 192 and the oil filter seat 151, and the solid impurities in the lubricating oil can be filtered out by the oil filter 160. Then, as shown in FIG. 2B to FIG. 2D the lubricating oil is delivered from the oil filter 160 to the first internal oil passage 151a, and then delivered from the first internal oil passage 151a to the second internal oil passage 112. Then, the lubricating oil is injected or sprayed into the compression chamber 111 through the first oil injection hole 113 and the second oil injection hole 114 from the second internal oil passage 112 to perform the action of lubricating and cooling the first rotor 101 and the second rotor 102.

[0070] Then, as shown in FIG. 1D , FIG. 1E , FIG. 2C and FIG. 2E the mixed fluid formed by the lubricating oil and the compressed gas is discharged from the compression chamber 111 and sequentially flows through the oil-gas flow passage 152a and the annular flow passage 10 to sequentially perform the first oil-gas separation and the second oil-gas separation. Then, the compressed gas flows into the oil-gas separation space 171a from the bottom opening 1712 and then flows to the two oil fine separators 180 from the oil-gas passage 1721 to perform the third oil-gas separation.

[0071] As shown in FIG. 1B , FIG. 1F and FIG. 2E after the two oil fine separators 180 filter out the tiny oil droplets remaining in the compressed gas, the oil droplets can be delivered to the bearing mounting space 152b through the two fourth external oil passages 193, 193a to perform the action of lubricating the first bearing 103 and the second bearing 104. As shown in FIG. 1A , FIG. 1F and FIG. 2E the oil fine separators 180 have communication openings 182 connected to the external gas passage 194 to be connected to the system through the external gas passage 194. After the two oil fine separators 180 filter out the tiny oil droplets remaining in the compressed gas, the compressed gas with low oil content can be delivered to the system through the external gas passage 194.

[0072] Through the flow passage design in the compressor structure 100, the lubricating oil can be fully utilized and recovered, and most of the lubricating oil can be separated from the compressed gas to avoid high-oil-content compressed gas from entering the system, while reducing the consumption of lubricating oil.

[0073] In this embodiment, after the two oil micro-separators 180 filter out the tiny oil droplets remaining in the compressed gas, the oil droplets can pass through the communication port 181a into the fourth external oil passage 193, and the oil droplets can pass through the communication port 181b into the fourth external oil passage 193a. Then, the oil droplets can be transported through the fourth external oil passage 193 to the communication port 153a to be transported to the bearing mounting space 152b through the communication port 153a, and the oil droplets can be transported through the fourth external oil passage 193a to the communication port 153b to be transported to the bearing mounting space 152b through the communication port 153b. Therefore, the oil droplets filtered by the two oil micro-separators 180 can be transported to the bearing mounting space 152b through two transport paths.

[0074] In other examples, the two oil micro-separators 180 can share a single communication port, and the bearing cover 153 has a single communication port. On the other hand, the communication port shared by the two oil micro-separators 180 is connected to the communication port of the bearing cover 153 through a single fourth external oil passage to communicate with the bearing mounting space 152b. Therefore, the oil droplets filtered by the two oil micro-separators 180 can be transported to the bearing mounting space 152b through a single transport path.

[0075] In other examples, the two communication ports of the two oil micro-separators 180 are respectively connected to two fourth external oil passages, and the two fourth external oil passages are connected to one communication port of the bearing cover 153 through a common valve or a common communication pipe. In actual applications, the communication ports of the oil micro-separators 180 and the bearing cover 153 and one or more fourth external oil passages matched therewith will be configured according to the design requirements of different compressor models.

[0076] Please refer to FIG. 1E and FIG. 2C to FIG. 2E In this embodiment, the oil-gas bucket 130 further includes an oil level gauge 135, wherein the oil level gauge 135 is disposed between the top portion 131 and the bottom portion 132 and close to the lower half of the oil-gas bucket 130 to facilitate observation of the liquid level of the lubricating oil stored in the oil-gas bucket 130, thereby determining the inventory of the lubricating oil. On the other hand, the oil-gas bucket 130 is internally provided with two flow straightening plates 136 extending from the bottom portion 132 to the top portion 131, and the two flow straightening plates 136 are located between the oil level gauge 135 and the oil sump 120.

[0077] When the mixed fluid is subjected to cyclonic separation in the annular flow passage 10 or the lubricating oil is dripping to the bottom portion 132, the liquid level of the lubricating oil stored in the oil-gas bucket 130 will be disturbed, causing fluctuations in the liquid level. Since the two flow straightening plates 136 can block or weaken the fluctuations transmitted to the oil level gauge 135, the liquid level of the lubricating oil close to the oil level gauge 135 is prevented from generating excessive fluctuations, thereby reducing the risk of misjudgment of the inventory of the lubricating oil.

[0078] FIG. 3 is a schematic view of the oil groove and the external cooler of the compressor structure of another embodiment of the present application. In the compressor structure 100 of the previous embodiment, the oil-gas bucket 130 is communicated with the external cooler 20 through the first external oil passage 190, please refer to FIG. 3 In the compressor structure 100A of the present embodiment, the first external oil passage 190 can be connected between the oil groove 120 and the external cooler 20. That is, the oil groove 120 is communicated with the external cooler 20 through the first external oil passage 190, so as to transport the lubricating oil stored in the oil groove 120 to the external cooler 20 through the first external oil passage 190, and perform the action of cooling.

[0079] FIG. 4 is a schematic view of the compressor structure of another embodiment of the present application. Please refer to FIG. 4 Unlike the compressor structure 100 shown in FIG. 1A to FIG. 1C , in the compressor structure 100B of the present embodiment, the motor 140 and the first mounting seat 150 are respectively arranged on opposite sides of the compressor housing 110, and the bearing seat 152 is arranged between the oil-gas bucket 130 and the compressor housing 110. That is, the oil-gas bucket 130 is arranged opposite to the motor 140 through the bearing seat 152. Based on this configuration, the oil-gas flow channel 152a1 extends from the bearing seat 152 to the oil-gas bucket 130, so as to be communicated with the oil-gas bucket 130, and falls in different planes in space with the bearing seat 152 and the bearing mounting space inside it.

[0080] In summary, in the compressor structure of the present application, the mixed fluid formed by the lubricating oil and the compressed gas is first subjected to the first oil-gas separation in the oil-gas flow channel by the centrifugal force after being discharged from the compression chamber, then the mixed fluid enters the oil-gas bucket from the oil-gas flow channel and is subjected to the second oil-gas separation in the oil-gas bucket by the cyclone separation action, so as to separate most of the lubricating oil from the compressed gas. Then, the compressed gas flows into the oil-gas separation space from the bottom opening, and then flows to the oil fine separator from the oil-gas passage for the third oil-gas separation. That is, unlike the conventional compressor structure which directly sends the mixed fluid from the compression chamber to the oil groove for oil-gas separation, the compressor structure of the present application adopts a three-step oil-gas separation procedure to greatly reduce the oil content of the compressed gas. Therefore, the compressor structure of the present application not only avoids the entry of compressed gas with high oil content into the system, but also reduces the consumption of lubricating oil.

[0081] Further, in the compressor structure of the present application, the oil filter and the oil separator are designed in an external type, which helps to improve the compactness of the structure configuration to reduce the volume. On the other hand, the compressor housing, the oil groove and the oil gas bucket are integrally cast into a structure, which can not only significantly improve the structural strength, reduce the assembly process, improve the manufacturing efficiency and reduce the manufacturing cost, but also improve the sealing performance to effectively reduce the oil gas leakage phenomenon. The advantage of the integrally cast structure is that the relative position of the compressor housing, the oil groove and the oil gas bucket can be changed according to the actual application requirements, and the connected oil groove and oil gas bucket help to improve the oil storage capacity. In addition, the lubricating oil cooled by cooling can first cool the motor, and then be injected or sprayed into the compression chamber to lubricate and cool the first rotor and the second rotor, which greatly improves the integration of the oil circuit and the utilization rate of the lubricating oil.

[0082] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A compressor structure, characterized by, Comprising: a compressor housing having a compression chamber; an oil sump; an oil-gas bucket integrally casted with the compressor housing and the oil sump; a motor; first mounts respectively disposed on opposite sides of the compressor housing, wherein the first mounts have an oil-gas flow channel, and the compression chamber is communicated with the oil-gas bucket through the oil-gas flow channel; at least one oil filter disposed on the first mounts and communicated with the compression chamber through the first mounts; second mounts disposed on the oil-gas bucket; and at least one oil fine separator disposed on the second mounts and communicated with the oil-gas bucket through the second mounts.

2. The compressor structure according to claim 1, characterized in that, The oil-gas bucket comprises a top and a bottom, and the top has a top opening, the second mounts are disposed on the top and cover the top opening, and the second mounts comprise an oil-gas separation cylinder inserted into the oil-gas bucket from the top opening and extending towards the bottom.

3. The compressor structure according to claim 2, characterized in that, An annular flow channel is formed between the inner wall surface of the oil-gas bucket and the outer wall surface of the oil-gas separation cylinder, and the oil-gas flow channel is communicated with the annular flow channel.

4. The compressor structure according to claim 3, characterized in that, The communication position of the oil-gas flow channel and the annular flow channel is close to the top opening, and the oil-gas separation cylinder has an oil-gas separation space surrounded by the annular flow channel, and the oil-gas separation space has a bottom opening towards the bottom.

5. The compressor structure according to claim 4, characterized in that, The oil fine separator is communicated with the oil-gas bucket through the oil-gas separation space.

6. The compressor structure according to claim 5, characterized in that, The second mounts further comprise a bucket cover connected with the oil-gas separation cylinder, and the bucket cover covers the top opening, and the oil fine separator is disposed on the bucket cover, wherein the bucket cover has an oil-gas passage, and the oil fine separator is communicated with the oil-gas separation space through the oil-gas passage.

7. The compressor structure according to claim 6, characterized in that, The oil-gas separation cylinder and the bucket cover are integrally casted.

8. The compressor structure according to claim 4, characterized by The oil-gas flow channel and the communication position form an inner passage, one end of the inner passage is communicated with the exhaust of the compression chamber, and the other end of the inner passage is communicated with the oil-gas bucket in the tangential direction of the outer wall surface of the oil-gas separation cylinder.

9. The compressor structure of claim 1, wherein The first mounts comprise an oil filter seat and a bearing seat, and the oil filter seat and the bearing seat are integrally casted, the oil filter is disposed on the oil filter seat and communicated with the compression chamber through the oil filter seat, and the first mounts further have a bearing mounting space separated from the oil-gas flow channel, and the oil-gas flow channel and the bearing mounting space are formed in the bearing seat.

10. The compressor structure according to claim 9, characterized in that, Further comprising: a first rotor coupled to the motor; a second rotor disposed in the compression chamber and engaged with the first rotor; and first and second bearings disposed in the bearing mounting space, wherein the end of the first rotor is inserted into the bearing mounting space, and the first bearing is sleeved on the end of the first rotor, the end of the second rotor is inserted into the bearing mounting space, and the second bearing is sleeved on the end of the second rotor, The first mounts further comprise a bearing seat cover, wherein the bearing seat cover is disposed on the bearing seat and covers the bearing mounting space and the oil-gas flow channel. ​ 11. The compressor structure of claim 9, wherein The oil filter seat has a first internal oil passage, and the compressor housing further has a second internal oil passage in communication with the compression cavity, the first internal oil passage is in communication with the second internal oil passage, and the oil filter is in communication with the compression cavity through the first internal oil passage and the second internal oil passage.

12. The compressor structure of claim 9, wherein The oil groove is arranged below the compressor housing, and the oil-gas bucket is arranged opposite to the motor through the bearing seat.

13. The compressor structure of claim 1, wherein The oil-gas flow channel extends along an arc-shaped path and has a first port in communication with the compression cavity and a second port in communication with the oil-gas bucket.

14. The compressor structure of claim 13, wherein The second port and the first port have a height difference or no height difference in the direction of gravity.

15. The compressor structure of claim 1, wherein Further comprising: a first external oil passage, wherein the oil-gas bucket is in communication with an external cooler through the first external oil passage; a second external oil passage, wherein the external cooler is in communication with the motor through the second external oil passage; a third external oil passage, wherein the motor is in communication with the oil filter through the third external oil passage; and at least a fourth external oil passage, wherein the oil fine separator is in communication with the first mounting seat through the fourth external oil passage.

16. The compressor structure of claim 15, wherein The first mounting seat further has a bearing mounting space separated from the oil-gas flow channel, and the fourth external oil passage is in communication with the bearing mounting space.

17. The compressor structure of claim 15, wherein The motor comprises a motor housing, and the motor housing has a cooling flow channel, the external cooler is in communication with an input port of the cooling flow channel through the second external oil passage, and an output port of the cooling flow channel is in communication with the oil filter through the third external oil passage.

18. The compressor structure of claim 1, wherein The oil groove is arranged below the compressor housing, and the oil-gas bucket is arranged at the side of the oil groove.

19. The compressor structure of claim 1, wherein The lower half of the internal space of the oil-gas bucket is in communication with the oil groove.

20. The compressor structure of claim 1, wherein Further comprising: an external oil passage, wherein the oil groove is in communication with an external cooler through the external oil passage.

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