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. And the oil groove is arranged below the compressor shell. The compressor shell and the oil groove are located on the same side of the oil gas barrel. 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 exhaust flow channel, and the compression cavity communicates with the oil gas barrel through the exhaust 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. The compressor structure provided by the utility model is beneficial to improving the oil-gas separation effect and remarkably reducing the loss of lubricating oil.

Description

TECHNICAL FIELD

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

[0002] Screw compressor can be divided into oil-injected screw compressor and oil-free screw compressor, although oil-free screw compressor can provide completely oil-free gas, but the requirement to gas quality is higher, and maintenance difficulty is high and cost is high, therefore, the application of oil-free screw compressor is not as widely as oil-injected screw compressor.

[0003] In the process of running of oil-injected screw compressor, lubricating oil is sprayed into compression chamber to lubricate and cool rotor in compression chamber, thereby reducing working temperature. First, the lubricating oil sprayed into compression chamber will mix with gas entering compression chamber, and be compressed by rotor, then, the mixed fluid formed by lubricating oil and compressed gas is discharged from compression chamber and enters oil groove. When the mixed fluid enters oil groove, the mixed fluid will impact inner wall of oil groove or other components in oil groove to preliminarily separate lubricating oil and compressed gas, but the separation effect is generally poor, which leads to high oil content of gas entering system and increases consumption of lubricating oil. SUMMARY

[0004] The utility model provides a kind of compressor structure, which helps to improve the effect of oil-gas separation and significantly reduce the consumption of lubricating oil.

[0005] According to an embodiment of the utility model, the compressor structure includes a compressor housing, 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 housing has a compression chamber. The oil groove is arranged below the compressor housing. The oil-gas bucket is connected to the oil groove, and the compressor housing and the oil groove are located on the same side of the oil-gas bucket. The motor and the first mounting seat are respectively arranged on opposite sides of the compressor housing. The first mounting seat has an exhaust flow channel, and the compression chamber is connected to the oil-gas bucket through the exhaust flow channel. The oil filter is arranged on the first mounting seat and connected to 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 connected to the oil-gas bucket through the second mounting seat.

[0006] In the embodiment of the utility model, oil gas bucket includes top and bottom, and top has top opening, second mounting seat includes bucket cover and oil gas separation cylinder, and bucket cover and oil gas separation cylinder are integrally cast structure, bucket cover covers top opening, and oil fine separator is set up on bucket cover, oil gas separation cylinder is inserted from top opening into oil gas bucket, and extends to bottom, wherein the 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 exhaust flow channel is communicated with the annular flow channel.

[0007] In the embodiment of the utility model, the communication position of the exhaust 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 facing the bottom.

[0008] In the embodiment of the utility model, the oil fine separator is communicated with the oil gas bucket through the oil gas separation space, the bucket cover has an oil gas opening, and the oil fine separator is communicated with the oil gas separation space through the oil gas opening.

[0009] In the embodiment of the utility model, the oil gas bucket includes a top, a bottom, and an oil viewing lens, and the second mounting seat is arranged on the top, the oil viewing lens is arranged between the top and the bottom, and is close to the lower half of the oil gas bucket.

[0010] In the embodiment of the utility model, two rectifier plates corresponding to the oil viewing lens are arranged inside the oil gas bucket, and the two rectifier plates are located between the oil viewing lens and the oil tank.

[0011] In the embodiment of the utility model, the gap between the two rectifier plates is gradually expanded from the oil tank to the oil viewing lens.

[0012] In the embodiment of the utility model, the smallest gap farthest from the oil viewing lens in the gap is 1 / 2 to 3 times the width of the oil viewing lens.

[0013] In the embodiment of the utility model, each rectifier plate has a first surface facing the oil tank and a second surface facing the oil viewing lens, and the included angle between the two second surfaces of the two rectifier plates is between 30 degrees and 180 degrees.

[0014] In the embodiment of the utility model, two rectifier plates corresponding to the oil viewing lens are arranged inside the oil gas bucket, and the two rectifier plates extend upward from the bottom.

[0015] In the embodiment of the utility model, two rectifier plates corresponding to the oil viewing lens are arranged inside the oil gas bucket, and the two rectifier plates are arranged on the inner wall surface connected to the bottom in the oil gas bucket.

[0016] In the embodiment of the utility model, a plurality of external linear ribs are arranged side by side outside the oil tank, and a plurality of internal linear ribs are arranged inside the oil tank.

[0017] In the embodiment of the utility model, first mounting seat includes oil filter seat and bearing seat, oil filter is set up on oil filter seat, and is communicated with compression cavity through oil filter seat, first mounting seat still has bearing installation space separated from exhaust flow channel, and exhaust flow channel and bearing installation space are formed in bearing seat.

[0018] In the embodiment of the utility model, still include: first rotor, coupling in motor;Second rotor, with first rotor set up in compression cavity, and intermeshing;And first bearing and second bearing, set up in bearing installation space, wherein the end of first rotor inserts bearing installation space, and first bearing is sleeved on the end of first rotor, the end of second rotor inserts bearing installation space, and second bearing is sleeved on the end of second rotor.

[0019] In the embodiment of the utility model, motor includes motor rotor, motor stator around motor rotor and the shaft sleeve tightly fitted and fixed in the inside of motor rotor, and the shaft sleeve tightly fitted and fixed in the butt joint end of first rotor, and the compressor structure still includes plug key, wherein the butt joint end has first clamping groove, and the shaft sleeve has second clamping groove, and the plug key is engaged in first clamping groove and second clamping groove.

[0020] In the embodiment of the utility model, first mounting seat still includes: bearing seat cover, set up in bearing seat, and cover bearing installation space and exhaust flow channel.

[0021] In the embodiment of the utility model, exhaust flow channel surrounds bearing installation space, and the concave arc side of exhaust flow channel faces bearing installation space.

[0022] In the embodiment of the utility model, exhaust flow channel has first port communicated with compression cavity and second port communicated with oil-gas bucket, and second port and first port exist high-low difference or no high-low difference in gravity direction.

[0023] In the embodiment of the utility model, one end of exhaust flow channel is communicated with the exhaust of compression cavity, and the other end of exhaust flow channel is communicated with oil-gas bucket in the tangential direction of the outer wall surface of oil-gas separation cylinder.

[0024] In the embodiment of the utility model, a part of exhaust flow channel surrounds bearing installation space.

[0025] In the embodiment of the utility model, oil filter seat has first internal oil passage, and the compressor shell still has second internal oil passage communicated with compression cavity, first internal oil passage is communicated with second internal oil passage, and oil filter is communicated with compression cavity through first internal oil passage and second internal oil passage, wherein the compressor shell still has at least one oil injection hole, and second internal oil passage is communicated with compression cavity through at least one oil injection hole.

[0026] In the embodiment of the utility model, still include: first external oil circuit, wherein oil gas bucket is communicated with external cooler through first external oil circuit, second external oil circuit, wherein external cooler is communicated with motor through second external oil circuit, third external oil circuit, wherein motor is communicated with oil filter through third external oil circuit, and at least one fourth external oil circuit, wherein oil fine separator is communicated with first mounting seat through fourth external oil circuit.

[0027] In the embodiment of the utility model, first mounting seat still has bearing mounting space separated from exhaust passage, and fourth external oil circuit is communicated with bearing mounting space.

[0028] In the embodiment of the utility model, motor includes motor casing, and motor casing has cooling flow channel, and external cooler is communicated with the input of cooling flow channel through second external oil circuit, and the output of cooling flow channel is communicated with oil filter through third external oil circuit.

[0029] In the embodiment of the utility model, oil groove has oil groove mouth in the lower of motor, and oil groove is equipped with oil groove cover that closes oil groove mouth.

[0030] In the embodiment of the utility model, still include: external oil circuit, wherein oil groove is communicated with external cooler through external oil circuit.

[0031] Based on above, in the compressor structure of the utility model, the mixed fluid formed by lubricating oil and compressed gas is discharged from compression chamber, and then carries out oil-gas separation in exhaust passage and oil gas bucket, to separate most lubricating oil from compressed gas, and then enters oil groove and oil gas bucket to store. Therefore, the compressor structure of the utility model not only can avoid high oil content compressed gas into the system, but also can reduce the consumption of lubricating oil. On the other hand, the oil groove is arranged below the compressor casing, wherein the oil gas bucket is communicated with the oil groove, and the compressor casing and the oil groove are located on the same side of the oil gas bucket, so that the compactness of the structure configuration is improved to reduce the volume, and the oil storage capacity of the compressor structure is improved.

[0032] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following embodiments are taken as examples, and are described in detail as follows with the help of the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0033] FIG. 1A With FIG. 1B It is the schematic diagram of the compressor structure of an embodiment of the utility model in two different visual angles;

[0034] FIG. 1C It is FIG. 1A The schematic diagram of bearing seat cover dismounting bearing seat;

[0035] FIG. 1D It is FIG. 1Ca partial enlarged view of the bearing seat of the compressor structure 100 from another perspective;

[0036] FIG. 1E is FIG. 1C a partial cross-sectional view of the compressor structure 100;

[0037] FIG. 1F is FIG. 1A a top view of a flow path of the compressor structure 100;

[0038] FIG. 2A is FIG. 1A a front view of the compressor structure 100;

[0039] FIG. 2B is FIG. 2A a cross-sectional view along line segment 2B-2B;

[0040] FIG. 2C is FIG. 2A a cross-sectional view along line segment 2C-2C;

[0041] FIG. 2D is FIG. 2C a schematic view of the first rotor and the second rotor of the compressor structure 100;

[0042] FIG. 2E is FIG. 2A a cross-sectional view along line segment 2E-2E;

[0043] FIG. 3 is FIG. 1A a partial exploded view of the compressor structure 100 from another perspective;

[0044] FIG. 4 is a schematic view of the oil sump and the external cooler of the compressor structure 100 according to another embodiment of the present application;

[0045] FIG. 5 is a schematic view of the compressor structure 100 according to yet another embodiment of the present application. DETAILED DESCRIPTION

[0046] Please refer to FIG. 1A and FIG. 1B In the present embodiment, the compressor structure 100 comprises a compressor housing 110, an oil sump 120, an oil-gas bucket 130, a motor 140, a first mounting seat 150, at least one oil filter 160, a second mounting seat 170, and at least one oil fine separator 180. In detail, the oil sump 120 is arranged below the compressor housing 110, wherein the oil-gas bucket 130 is in communication with the oil sump 120, and the compressor housing 110 and the oil sump 120 are located on the same side of the oil-gas bucket 130, thus improving the compactness of the structural configuration to reduce the volume.

[0047] As FIG. 1A , FIG. 1B ,FIG. 2A and FIG. 2B As shown, the motor 140 and the first mounting base 150 are respectively disposed on opposite sides of the compressor housing 110, wherein the oil filter 160 is disposed on the first mounting base 150 and located outside the first mounting base 150. Additionally, the second mounting base 170 is disposed on the oil-gas separator 130, wherein the oil-fine separator 180 is disposed 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.

[0048] For example, the first mounting base 150 can be secured to the compressor housing 110 by bolts, screws or other locking parts. Additionally, the second mounting base 170 can be secured to the top 131 of the oil-gas separator 130 by bolts, screws or other locking parts.

[0049] like FIG. 1B to FIG. 1D As shown, the first mounting base 150 includes an oil filter seat 151 and a bearing seat 152, wherein an oil filter 160 is disposed on the oil filter seat 151, and the first mounting base 150 has an exhaust passage 152a and a bearing mounting space 152b formed in the bearing seat 152. FIG. 1C to FIG. 1E As shown, the exhaust channel 152a is separate from the bearing mounting space 152b. The exhaust channel 152a extends from bottom to top along an arc-shaped path to the oil and gas tank 130 on the periphery of the bearing mounting space 152b, and the compression chamber 111 of the compressor housing 110 is connected to the oil and gas tank 130 through the exhaust channel 152a.

[0050] like FIG. 1D , FIG. 1E , FIG. 2B and FIG. 2C In this embodiment, the compressor structure 100 further includes a first rotor 101 and a second rotor 102 arranged side-by-side in the compression chamber 111, and a first bearing 103 and a second bearing 104 arranged side-by-side in the bearing mounting space 152b. The first rotor 101 is coupled to the motor 140, and the first rotor 101 and the second rotor 102 may be two meshing screws. Furthermore, 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.

[0051] For example, the first rotor 101 and the second rotor 102 that mesh with each other can be arranged horizontally to the left and right, but this is not a limitation. The first rotor 101 and the second rotor 102 that mesh with each other can also be arranged vertically to the top and bottom, or have a height difference between their long axes (or rotation axes) in the direction of gravity GD.

[0052] As shown in FIG. 2C , the motor 140 comprises a motor housing 141, a motor rotor 142, a motor stator 143 surrounding the motor rotor 142, and a shaft sleeve 144 fixedly fitted inside the motor rotor 142, wherein the motor rotor 142, the motor stator 143, and the shaft sleeve 144 are disposed in the motor housing 141, and the shaft sleeve 144 is fixedly fitted to the abutting end 101b of the first rotor 101. Further, the compressor structure 100 further comprises a key 105, wherein the abutting end 101b has a first clamping slot 101c, and the shaft sleeve 144 has a second clamping slot 144a. The key 105 is clamped in the first clamping slot 101c and the second clamping slot 144a. Therefore, the first rotor 101 and the shaft sleeve 144 use the key 105 for power transmission, and are concentrically aligned by shaft hole interference, so that the shaft sleeve 144 and the first rotor 101 are stably fixedly connected and co-rotated.

[0053] As shown in FIG. 1A , FIG. 1C , and FIG. 2C , the first mounting seat 150 further comprises a bearing seat cover 153 disposed on the bearing seat 152 to cover or enclose the bearing mounting space 152b and the exhaust flow channel 152a. For example, the bearing seat cover 153 can be locked and fixed to the bearing seat 152 by bolts, screws or other locking parts to cover or enclose the bearing mounting space 152b and the exhaust flow channel 152a, which not only prevents oil gas leakage, foreign matter intrusion or water vapor intrusion, but also improves the convenience of cleaning, replacement or maintenance.

[0054] As shown in FIG. 1C , FIG. 2B , FIG. 2C , and FIG. 2D , the oil filter 160 can be connected to the compression cavity 111 through the first mounting seat 150, specifically through the oil filter seat 151 and the compression cavity 111. 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 connected to the compression cavity 111. The first internal oil passage 151a is connected to the second internal oil passage 112, and the oil filter 160 is connected to 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 corresponding to the first rotor 101 and a second oil injection hole 114 corresponding to the second rotor 102, and the second internal oil passage 112 is connected to the compression cavity 111 through the first oil injection hole 113 and the second oil injection hole 114.

[0055] First, solid impurities in the lubricating oil can be filtered out by the oil filter 160, and then 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, and then injected or sprayed into the compression chamber 111 from the second internal oil passage 112 via the first oil injection hole 113 and the second oil injection hole 114, so as to lubricate and cool the first rotor 101 and the second rotor 102.

[0056] 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, so that the design of the lubricating oil injection or spray into the compression chamber 111 is a design of inclined injection or inclined spray, so as to lubricate and cool the first rotor 101 and the second rotor 102 in a larger range.

[0057] As shown in FIG. 1A , FIG. 1E , FIG. 2C and FIG. 2E , the oil fine 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 integrally cast into a structure, which not only can significantly improve the structural strength, improve the manufacturing efficiency and reduce the manufacturing cost, but also can improve the sealing performance to effectively reduce the oil and gas leakage phenomenon. 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.

[0058] For example, the bucket cover 172 can be locked and fixed on 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 can prevent oil and gas leakage, foreign matter invasion or water vapor invasion, but also can improve the convenience of cleaning, replacement or maintenance.

[0059] As shown in FIG. 1E , FIG. 2C and FIG. 2EAs shown, the oil-gas separator 171 is inserted into the oil-gas tank 130 through the top opening 131a and extends towards the bottom 132 of the oil-gas tank 130. On the other hand, an annular flow channel 10 is formed between the inner wall surface 133 of the oil-gas tank 130 and the outer wall surface 1711 of the oil-gas separator 171, and an exhaust flow channel 152a communicates with the annular flow channel 10. Specifically, the oil-gas separator 171 may be a hollow cylinder and has an oil-gas separation space 171a surrounded by the annular flow channel 10. The connection point 11 between the exhaust 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 communicates with the internal space of the oil-gas tank 130 and also with the annular flow channel 10.

[0060] An oil-fine separator 180 is mounted on and outside the barrel cover 172. The barrel cover 172 has an oil-gas inlet 1721, which communicates with the oil-gas separation space 171a. Therefore, the oil-fine separator 180 can connect to the oil-gas separation space 171a via the oil-gas inlet 1721, and through the oil-gas separation space 171a, it can communicate with the internal space of the oil-gas tank 130, and also with the annular flow channel 10.

[0061] like FIG. 1D , FIG. 1E , FIG. 2C and FIG. 2D As shown, the lubricating oil injected or sprayed into the compression chamber 111 mixes with the gas entering the compression chamber 111 and is compressed by the first rotor 101 and the second rotor 102. Then, the mixed fluid formed by the lubricating oil and the compressed gas is discharged from the compression chamber 111 and flows into the exhaust channel 152a. Because the exhaust channel 152a extends from bottom to top along an arc path towards the oil-gas tank 130 on the periphery of the bearing mounting space 152b, the mixed fluid will be subjected to centrifugal force during its flow from the exhaust channel 152a to the oil-gas tank 130, so that a portion of the lubricating oil is separated from the compressed gas. This is the first oil-gas separation.

[0062] In this embodiment, the exhaust channel 152a has a first port 1521 connected to the compression chamber 111 and a second port 1522 connected to the oil-gas tank 130. In the direction of gravity GD, there is a height difference H between the second port 1522 and the first port 1521, specifically, the second port 1522 is higher than the first port 1521. Therefore, during the flow of the mixed fluid from the first port 1521 to the second port 1522, the lubricating oil separated from the compressed gas can drip down to the bottom of the exhaust channel 152a under the influence of gravity.

[0063] Specifically, in order to make the overall configuration of the compressor structure 100 more suitable for practical application requirements, when the top 131 of the oil-gas bucket 130 is higher than the height of the first port 1521 of the compression cavity 111, the second port 1522 of the exhaust flow channel 152a is higher than the first port 1521 (i.e., the second port 1522 and the first port 1521 have a height difference H in the gravity direction GD), so that the mixed fluid formed by the lubricating oil and the compressed gas can enter the oil-gas bucket 130 from the bottom to the top along the exhaust flow channel 152a after being discharged from the compression cavity 111. In addition, when the top 131 of the oil-gas bucket 130 is not higher than the height of the first port 1521 of the compression cavity 111, the second port 1522 of the exhaust flow channel 152a is level with the first port 1521 (i.e., the second port 1522 and the first port 1521 have no height difference in the gravity direction GD) or the second port 1522 of the exhaust flow channel 152a is lower than the first port 1521, so that the mixed fluid formed by the lubricating oil and the compressed gas can smoothly enter the oil-gas bucket 130 along the exhaust flow channel 152a after being discharged from the compression cavity 111.

[0064] Next, as shown in FIG. 1E , FIG. 2C and FIG. 2E , the mixed fluid flows into the annular flow 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 bucket 130 in the annular flow channel 10 to separate most of the lubricating oil from the compressed gas by cyclonic separation, which is the second oil-gas separation. At the same time, the lubricating oil can drop to the bottom 132 of the oil-gas bucket 130 under the action of gravity, and the lubricating oil can be further collected into the oil tank 120 since the oil-gas bucket 130 is in communication with the oil tank 120. The design that the internal spaces of the oil-gas bucket 130 and the oil tank 120 are in communication can increase the oil storage capacity of the compressor structure 100.

[0065] As shown in FIG. 1E and FIG. 2E , 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 fine separator 180 from the oil-gas passage 1721. In detail, the oil fine separator 180 can filter out the tiny oil droplets remaining in the compressed gas to prevent the tiny oil droplets from entering the system with the compressed gas, which is the third oil-gas separation.

[0066] As shown in FIG. 1D , FIG. 1E , FIG. 2C and FIG. 2EAs shown, the exhaust flow passage 152a is located at the bearing seat 152, and the communication position 11 is located at the oil-gas bucket 130. The communication position 11 can be an extension of the second port 1522, i.e., the communication position 11 can be a part of the exhaust flow passage 152a. Further, one end of the exhaust flow passage 152a (i.e., the first port 1521 of the exhaust flow passage 152a) is in communication with the exhaust of the compression chamber 111, and the other end of the exhaust flow passage 152a (i.e., the communication position 11) is in communication with the oil-gas bucket 130 in a tangential direction of the outer wall surface 1711 of the oil-gas separation cylinder 171.

[0067] As shown in FIG. 1, the compressor structure 100 further includes an oil groove 120, an oil-gas bucket 130, an exhaust flow passage 152a, and a bearing seat 152. The oil groove 120 is located below the compressor housing 110, and the oil-gas bucket 130 is located at a side of the oil groove 120. The oil-gas bucket 130 is in communication with the oil groove 120, and the oil-gas bucket 130 is in communication with the bearing seat 152. FIG. 1A , FIG. 1B , FIG. 1C and FIG. 1E As shown, in the present embodiment, the oil groove 120 is located below the compressor housing 110, and the oil-gas bucket 130 is located at a side of the oil groove 120. Based on this configuration, the extended path of the exhaust flow passage 152a in communication with the oil-gas bucket 130 is an arc-shaped path around the bearing mounting space 152b, and the bearing mounting space 152b and the arc-shaped path can fall in the same plane in space.

[0068] As shown in FIG. 1, the compressor structure 100 further includes an oil groove 120, an oil-gas bucket 130, an exhaust flow passage 152a, and a bearing seat 152. The oil groove 120 is located below the compressor housing 110, and the oil-gas bucket 130 is located at a side of the oil groove 120. The oil-gas bucket 130 is in communication with the oil groove 120, and the oil-gas bucket 130 is in communication with the bearing seat 152. FIG. 1B , FIG. 1E , FIG. 1F and FIG. 2C As shown, in the present 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 a fourth external oil passage 193. In detail, the bottom 132 of the oil-gas bucket 130 has a communication port 134, wherein one end of the first external oil passage 190 is connected to the communication 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 bucket 130 is in communication with the external cooler 20 through the first external oil passage 190.

[0069] On the other hand, the motor housing 141 has a cooling flow passage 141a, and the cooling flow passage 141a has opposite first and second flow ports 141b and 141c. In detail, 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 flow port 141b. That is, the external cooler 20 is in communication with the motor 140, specifically the cooling flow passage 141a of the motor housing 141, through the second external oil passage 191.

[0070] 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.

[0071] 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.

[0072] As shown in FIG. 1B , 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.

[0073] 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.

[0074] 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.

[0075] 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 to perform the action of lubricating and cooling the first rotor 101 and the second rotor 102.

[0076] 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 exhaust 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.

[0077] 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 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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 baffles 136 corresponding to the oil level gauge 135, wherein the two baffles 136 are located between the oil level gauge 135 and the oil sump 120 and extend from the bottom portion 132 to the top portion 131 or upwardly.

[0083] When the mixed fluid is subjected to cyclonic separation in the annular flow passage 10 or the lubricating oil drops 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 baffles 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.

[0084] It is particularly noted that the two flow-rectifying plates 136 are not limited to being protruded from the bottom 132, but can be protruded from other positions of the lower half of the oil-gas bucket 130, such as the inner wall surface 133 connected to the bottom 132 of the oil-gas bucket 130, but not contacting the bottom 132, or other positions capable of blocking the path of the fluctuation of the liquid surface to the oil sight glass 135.

[0085] On the other hand, the present embodiment is described with the two flow-rectifying plates 136 being disposed close to the oil sight glass 135, and substantially located on opposite sides of the oil sight glass 135, however, the two flow-rectifying plates 136 and the oil sight glass 135 can be disposed close to the bearing seat 152 or the motor 140 for the convenience of personnel observation.

[0086] As shown in FIG. 1E , FIG. 2C and FIG. 2D , the two flow-rectifying plates 136 have a gap S therebetween, and the gap S gradually expands from the oil sump 120 to the oil sight glass 135. When the fluctuation of the liquid surface of the lubricating oil in the oil-gas bucket 130 is transmitted to the oil sight glass 135, the wave speed gradually decreases and the fluctuation gradually disappears as the gap S gradually expands. For example, the smallest gap of the gap S farthest from the oil sight glass 135 can be 1 / 2 times the width W of the oil sight glass 135, and the largest gap of the gap S closest to the oil sight glass 135 can be 3 times the width W of the oil sight glass 135. That is, the size of the gap S is between 1 / 2 times and 3 times the width W.

[0087] On the other hand, each flow-rectifying plate 136 has a first surface 136a facing the oil sump 120 and a second surface 136b facing the oil sight glass 135, and the included angle ANG between the two second surfaces 136b of the two flow-rectifying plates 136 is between 30 degrees and 180 degrees. When the fluctuation of the liquid surface of the lubricating oil in the oil-gas bucket 130 occurs, the two first surfaces 136a of the two flow-rectifying plates 136 can block or weaken the fluctuation transmitted to the oil sight glass 135.

[0088] As shown in FIG. 1A , FIG. 1B and FIG. 3The oil tank 120 is externally provided with a plurality of external linear ribs 121 in parallel to improve the structural strength. In addition, the oil tank 120 is internally provided with a plurality of internal linear ribs 122, for example, cross ribs, staggered to improve the structural strength. In the embodiment, the oil tank 120 has an oil tank opening 123 below the motor 140, and the oil tank 120 is provided with an oil tank cover 124 to facilitate the processing of the first oil injection hole 113 and the second oil injection hole 114 and the like in the internal space of the oil tank 120, and then the oil tank opening 123 is closed. For example, the oil tank cover 124 can be locked and fixed to the oil tank 120 by bolts, screws or other locking parts to cover or close the oil tank opening 123, which not only prevents oil gas leakage, foreign matter intrusion or water vapor intrusion, but also improves the convenience of cleaning, replacement or maintenance.

[0089] FIG. 4 The figure is a schematic view of the configuration of the oil tank and the external cooler of the compressor structure of another embodiment of the utility model. 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 way 190, please refer to FIG. 4 In the compressor structure 100A of the embodiment, the first external oil way 190 can be connected between the oil tank 120 and the external cooler 20. That is, the oil tank 120 is communicated with the external cooler 20 through the first external oil way 190 to transport the lubricating oil stored in the oil tank 120 to the external cooler 20 through the first external oil way 190 to perform the action of cooling.

[0090] FIG. 5 The figure is a schematic view of the compressor structure of another embodiment of the utility model. Please refer to FIG. 5 Unlike the compressor structure 100 shown in FIG. 1A to FIG. 1C In the compressor structure 100B of the embodiment, the motor 140 and the first mounting seat 150 are arranged on opposite sides of the compressor shell 110 respectively, and the bearing seat 152 is arranged between the oil gas bucket 130 and the compressor shell 110. That is, the oil gas bucket 130 is arranged opposite to the motor 140 through the bearing seat 152. Based on the configuration, the exhaust flow channel 152a1 extends from the bearing seat 152 to the oil gas bucket 130 to communicate 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.

[0091] In summary, 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 firstly separated by centrifugal force in the exhaust flow channel, then the mixed fluid enters the oil-gas bucket from the exhaust flow channel and is secondly separated by cyclone separation in the oil-gas bucket 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 through hole to be thirdly separated. That is, unlike the conventional compressor structure that directly sends the mixed fluid from the compression chamber to the oil groove for oil-gas separation, the compressor structure of the utility model adopts a three-stage oil-gas separation procedure to greatly reduce the oil content of the compressed gas. Therefore, the compressor structure of the utility model not only avoids high-oil-content compressed gas from entering the system, but also reduces the consumption of lubricating oil.

[0092] On the other hand, the oil groove is arranged below the compressor housing, wherein the oil-gas bucket is in communication with the oil groove, and the compressor housing and the oil groove are located on the same side of the oil-gas bucket, so as to improve the compactness of the structural configuration to reduce the volume and improve the oil storage capacity of the compressor structure. In addition, the oil-gas bucket is provided with a flow straightener inside to block or weaken the fluctuations transmitted to the sight glass, so as to avoid the liquid level of the lubricating oil from generating excessive fluctuations near the sight glass to reduce the misjudgment of the lubricating oil inventory. In addition, the cooled lubricating oil 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, greatly improving the integration of the oil circuit and the utilization rate of the lubricating oil.

[0093] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they 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 utility model.

Claims

1. A compressor structure, characterized by, Comprising: a compressor housing having a compression chamber; an oil sump disposed below the compressor housing; an oil-gas bucket in communication with the oil sump, and the compressor housing and the oil sump are located at the same side of the oil-gas bucket; a motor; a first mounting seat disposed at opposite sides of the compressor housing respectively with the motor, wherein the first mounting seat has an exhaust flow channel, and the compression chamber is in communication with the oil-gas bucket through the exhaust flow channel; at least one oil filter disposed on the first mounting seat and in communication with the compression chamber through the first mounting seat; a second mounting seat disposed on the oil-gas bucket; and at least one oil fine separator disposed on the second mounting seat and in communication with the oil-gas bucket through the second mounting seat.

2. The compressor structure according to claim 1, characterized in that, The oil-gas bucket includes a top and a bottom, and the top has a top opening, the second mounting seat includes a bucket cover and an oil-gas separation cylinder, and the bucket cover and the oil-gas separation cylinder are integrally cast into a structure, the bucket cover covers the top opening, and the oil fine separator is disposed on the bucket cover, the oil-gas separation cylinder is inserted into the oil-gas bucket from the top opening and extends to the bottom, wherein 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 exhaust flow channel is in communication with the annular flow channel.

3. The compressor structure according to claim 2, characterized in that, The communication position of the exhaust 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.

4. The compressor structure according to claim 3, characterized in that, The oil fine separator is in communication with the oil-gas bucket through the oil-gas separation space, the bucket cover has an oil-gas passage, and the oil fine separator is in communication with the oil-gas separation space through the oil-gas passage.

5. The compressor structure of claim 1, wherein The oil-gas bucket includes a top, a bottom, and an oil viewing mirror, and the second mounting seat is disposed on the top, the oil viewing mirror is disposed between the top and the bottom, and is close to the lower half of the oil-gas bucket.

6. The compressor structure according to claim 5, characterized in that, The oil-gas bucket is internally provided with two flow straightening plates corresponding to the oil viewing mirror, and the two flow straightening plates are located between the oil viewing mirror and the oil sump.

7. The compressor structure according to claim 6, characterized in that, The two flow straightening plates have a gap therebetween, and the gap gradually expands from the oil sump to the oil viewing mirror.

8. The compressor structure according to claim 7, characterized in that, The smallest gap farthest from the oil viewing mirror in the gap is 1 / 2 to 3 times the width of the oil viewing mirror.

9. The compressor structure of claim 6, wherein Each of the flow straightening plates has a first surface facing the oil sump and a second surface facing the oil viewing mirror, and the included angle between the two second surfaces of the two flow straightening plates is between 30 degrees and 180 degrees.

10. The compressor structure of claim 5, wherein The oil-gas bucket is internally provided with two flow straightening plates corresponding to the oil viewing mirror, and the two flow straightening plates extend upward from the bottom.

11. The compressor structure of claim 5, wherein The oil-gas bucket is internally provided with two flow straightening plates corresponding to the oil viewing mirror, and the two flow straightening plates are convexly provided on the inner wall surface of the oil-gas bucket connected with the bottom.

12. The compressor structure of claim 1, wherein The oil sump is externally provided with a plurality of external linear convex ribs in parallel, and the oil sump is internally provided with a plurality of internal linear convex ribs in staggered.

13. The compressor structure of claim 2, wherein The first mounting base includes an oil filter seat and a bearing seat, the oil filter is arranged on the oil filter seat and is communicated with the compression cavity through the oil filter seat, and the first mounting base further has a bearing mounting space separated from the exhaust flow channel, and the exhaust flow channel and the bearing mounting space are formed in the bearing seat.

14. The compressor structure of claim 13, wherein Further comprising: a first rotor coupled to the motor; a second rotor arranged in the compression cavity with the first rotor and engaged with each other; and a first bearing and a second bearing arranged in the bearing mounting space, wherein an 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, an 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.

15. The compressor structure of claim 14, wherein, The motor includes a motor mover, a motor stator surrounding the motor mover, and a shaft sleeve fixedly fitted in the interior of the motor mover, and the shaft sleeve is fixedly fitted to the butt joint end of the first rotor, and the compressor structure further includes an insertion key, wherein the butt joint end has a first clamping groove, the shaft sleeve has a second clamping groove, and the insertion key is clamped in the first clamping groove and the second clamping groove.

16. The compressor structure of claim 13, wherein The first mounting base further includes: a bearing seat cover arranged on the bearing seat and covering the bearing mounting space and the exhaust flow channel.

17. The compressor structure of claim 13, wherein The exhaust flow channel surrounds the bearing mounting space, and the concave side of the exhaust flow channel faces the bearing mounting space.

18. The compressor structure of claim 17, wherein, The exhaust flow channel has a first port communicated with the compression cavity and a second port communicated with the oil-gas bucket, and the second port and the first port have a height difference or no height difference in the direction of gravity.

19. The compressor structure of claim 13, wherein One end of the exhaust flow channel is communicated with the exhaust of the compression cavity, and the other end of the exhaust flow channel is communicated with the oil-gas bucket in the tangential direction of the outer wall surface of the oil-gas separation cylinder.

20. The compressor structure of claim 19, wherein, A part of the exhaust flow channel surrounds the bearing mounting space.

21. The compressor structure of claim 13, wherein The oil filter seat has a first internal oil passage, and the compressor shell 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, wherein the compressor shell further has at least one oil injection hole, and the second internal oil passage is communicated with the compression cavity through the at least one oil injection hole.

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

23. The compressor structure of claim 22, wherein, The first mounting base further has a bearing mounting space separated from the exhaust flow channel, and the fourth external oil passage is communicated with the bearing mounting space.

24. The compressor structure of claim 22, wherein, The motor includes a motor housing having a cooling flow passage, an external cooler is connected to an input port of the cooling flow passage through the second external oil passage, and an output port of the cooling flow passage is connected to the oil filter through the third external oil passage.

25. The compressor structure of claim 1, wherein The oil sump has an oil sump port located below the motor, and the oil sump is provided with an oil sump cover for closing the oil sump port.

26. The compressor structure of claim 1, wherein Further comprising: An external oil passage, wherein the oil sump is connected to an external cooler through the external oil passage.

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