Compressor, oil mist treatment device and oil cooling circulation system thereof

Abstract

The invention belongs to the technical field of compressors, and particularly relates to a compressor, an oil mist treatment device and an oil cooling circulation system of the oil mist treatment device. The defects of unreasonable design and the like in the prior art are overcome. The compressor comprises a butt joint piece with a turbulent flow area on the top side in the butt joint piece, an oil receiving disc extending outwards in the radial direction of the butt joint piece is arranged on the outer top of the butt joint piece, and an outer cover with meshes in at least part of the side wall is arranged on the oil receiving disc. A mesh enclosure dividing the inner space of the outer cover into an inner separation cavity and an outer separation cavity is arranged at the top of the butt-joint piece or in the outer cover, a first filter screen is arranged in the inner separation cavity, a second filter screen is arranged in the outer separation cavity, the oil receiving disc is communicated with the butt-joint piece through a backflow bypass pipe, and the oil receiving disc is communicated with the butt-joint piece through a backflow bypass pipe. And at least part of the air inducing device extends into the outer separation cavity. The oil mist separator has the advantage that the phenomenon that oil mist separation is not thorough is thoroughly solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressors, and in particular relates to a compressor, an oil mist treatment device and an oil cooling circulation system thereof. Background Art

[0002] The compressor is a device that works on the medium and can increase the pressure of the medium.

[0003] The supercharging adopts multiple working units connected in series, such as volute impellers, and the drive of multiple impellers is driven by mechanical power. When running at high speed, the mechanical power drive needs to cool the lubricating oil, and the oil pressure station connected to the mechanical power will have oil mist due to the heating of the lubricating oil. Conventional oil mist treatment is not thorough. For example, CN201921878651.5 discloses an oil-gas separator for a medium-pressure compressor, including a cylinder, a liner, an oil mist fine separator and a lubricating oil filter. The oil mist fine separator is arranged in the liner, and the lubricating oil filter is arranged in the cylinder. During operation, the oil-containing compressed air enters the cylinder tangentially along the inner wall of the cylinder from the air inlet, and rotates in the annular channel between the cylinder and the liner. The oil-containing compressed air rotates and separates the oil and air under the centrifugal action. The compressed air after centrifugal separation enters the inner cavity of the liner from the bottom of the liner. The oil mist separator is arranged in the liner, and the compressed air is further separated by the oil mist separator and discharged from the exhaust port; the lubricating oil after centrifugal separation flows down along the inner wall of the cylinder to the bottom of the cylinder, and the separated lubricating oil is filtered by the lubricating oil filter and discharged from the oil drain interface. The oil mist separator and the lubricating oil filter are installed in the cylinder to balance the pressure and avoid the problem of the oil mist separator and the lubricating oil filter being subjected to a large pressure difference.

[0004] Although the above solutions have the above technical advantages, they do not completely solve the technical problem of incomplete oil mist separation. Summary of the invention

[0005] The purpose of the present invention is to provide a compressor, an oil mist treatment device and an oil cooling circulation system thereof that can solve the above technical problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The oil mist treatment device of the compressor includes a docking piece with a turbulent zone on the inner top side, an oil receiving pan extending radially outward from the docking piece is provided on the outer top of the docking piece, an outer cover with mesh holes on at least part of the side walls is provided on the oil receiving pan, a mesh cover is provided on the top of the docking piece or in the outer cover to separate the internal space of the outer cover into an inner separation cavity and an outer separation cavity, a first filter is provided in the inner separation cavity, and a second filter is provided in the outer separation cavity to reserve space between the top and the inner top of the outer cover, the oil receiving pan and the docking piece are connected by a reflux bypass pipe, and at least part of the draft fan extends into the outer separation cavity.

[0007] In the above-mentioned oil mist treatment device of the compressor, the interior of the docking part has at least a conical cavity in the shape of a cone, the inner diameter of the conical cavity gradually increases from bottom to top, and an annular baffle extending radially inward from the docking part is provided at the top of the conical cavity, and the conical cavity and the annular baffle form the turbulent zone.

[0008] In the above-mentioned oil mist treatment device for the compressor, the annular baffle and the cavity wall of the conical cavity form an acute angle.

[0009] In the above-mentioned oil mist treatment device for the compressor, the mesh cover is a honeycomb mesh cover.

[0010] In the above-mentioned oil mist treatment device of the compressor, the mesh cover includes an upright annular mesh cylinder fixed to the top of the docking piece, and a recessed portion connected to the top of the upright annular mesh cylinder and having a downward recessed center. The air inducer is an air duct, and at least a portion of the air duct extends into the recessed portion.

[0011] In the above-mentioned oil mist treatment device for the compressor, the recessed sub-portion with the recessed portion is located above the side of the annular baffle, and the annular baffle and the recessed sub-portion form an annular connecting space connected to the inner bottom side of the inner separation cavity.

[0012] In the above-mentioned oil mist treatment device of the compressor, the lower end of the first filter is connected to the inner edge of the annular baffle, the upper end of the first filter is connected to the inner top of the recessed portion, and the first filter and the recessed sub-portion are spaced apart, and the first filter and the upright annular mesh cylinder are spaced apart.

[0013] In the above-mentioned oil mist treatment device for the compressor, the gap between the first filter screen and the recessed sub-portion is smaller than the spacing gap between the first filter screen and the upright annular mesh cylinder.

[0014] As a second scheme, the oil cooling circulation system of the compressor is used to connect the compression oil pressure station and the speed increaser, the oil cooling circulation system includes an oil mist treatment device of the compressor connected to the oil pressure station, and the oil cooling circulation system also includes an oil cooler, the oil pressure station is connected to the oil cooler through two parallel oil outlet pipes, an oil pump is installed on each of the oil outlet pipes, the diameter of one of the two oil outlet pipes is larger than the diameter of the other oil outlet pipe, the oil cooler is connected to the speed increaser through a main oil pipe, and the oil pressure station is connected to the speed increaser through an oil return pipe.

[0015] As a third solution, the compressor includes an oil cooling circulation system of the compressor.

[0016] Compared with the existing technology, the advantages of this application are: The induced air of the induced air duct forces the oil mist in the oil pressure station to enter the conical cavity, the inner separation cavity and the outer separation cavity upward in sequence, and the oil in the oil mist is separated through the turbulent area, the first filter screen and the second filter screen. Most of the separated oil flows downward from the conical cavity to the oil pressure station, and the remaining small part of the separated oil is collected by the oil receiving pan, and then flows back to the conical cavity from the reflux bypass pipe connecting the outer separation cavity and the conical cavity, thereby achieving thorough separation of the oil mist and preventing waste and loss of oil.

[0017] A slight vacuum is created inside the oil mist treatment device through the induced draft pipe. The vacuum formed by suction will assist in oil return, and smooth oil return will help seal the oil system of the equipment.

[0018] The compressor oil station forms a circulating supply of lubricating oil in the speed increaser through oil cooling to extend the service life of the speed increaser. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the top view structure of the compressor provided by the present invention.

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the compressor provided by the present invention.

[0021] Figure 3 It is a schematic diagram of the top view structure of the compressor body provided by the present invention.

[0022] Figure 4 yes Figure 2 Enlarged structural diagram at F in the middle.

[0023] Figure 5 It is a control block diagram provided by the present invention.

[0024] Figure 6 It is a structural schematic diagram of embodiment 2 provided by the present invention.

[0025] Figure 7 It is a schematic diagram of the side structure of the compressor provided by the present invention.

[0026] Figure 8 It is a schematic diagram of a partial top view of the structure of the compressor provided by the present invention.

[0027] Fig. 9 It is a schematic diagram of the structure of the oil mist treatment device provided by the present invention.

[0028] Fig.10 It is a partial structural schematic diagram of the oil mist treatment device provided by the present invention.

[0029] In the figure, the compressor body 1, the inlet 10, the outlet 11, the working unit 2, the volute 20, the impeller 21, the first impeller rotating shaft 22, the second impeller rotating shaft 23, the annular seal 24, the positioning step 25, the annular boss 26, the blocking ring 27, the small gap 28, the driving mechanism 3, the speed increaser 30, the driving shaft 31, the first gear transmission structure 32, the second gear transmission structure 33, the seal 4, the air pressure regulating system 5, the controller 6, the oil sealing ring 7, the sealing lip 70, the isobaric cavity K, the pressure sensor K1, the first working unit 2A, the second working unit 2B, the third working unit 2C, the oil cooling circulation system 8, Oil pressure station 80, oil cooler 81, oil return pipe 82, oil outlet pipe 83, oil pump 84, main oil pipe 85, fine filter 86, oil mist treatment device 87, docking piece 870, conical cavity 8700, annular baffle 8701, turbulent flow zone 8702, oil receiving pan 871, outer cover 872, inner separation cavity 8720, outer separation cavity 8721, mesh cover 873, upright annular mesh cylinder 8730, with recessed portion 8731, recessed sub-portion 8732, first filter 874, second filter 875, air duct 88, partition 89, spiral guide channel 890, conical partition upper part 891, annular partition lower part 892. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0031] Embodiment 1

[0032] like Figure 1 As shown, an oil cooling circulation system 8 connected to the speed increasing box 30 is provided on the compressor body 1. The oil cooling circulation system is a system including cooling pipes and a cooling pump or an oil station.

[0033] like Figure 7-Figure 9As shown, the oil cooling circulation system 8 includes an oil pressure station 80 and an oil cooler 81. The speed increasing box 30 is connected to the oil pressure station 80 through an oil return pipe 82 so that the oil in the speed increasing box 30 returns to the oil pressure station 80; the oil pressure station 80 is connected to the oil cooler 81 through two parallel oil outlet pipes 83, and an oil pump 84 is installed on each oil outlet pipe 83. The oil cooler 81 is connected to the speed increasing box 30 through a main oil pipe 85, and the main oil pipe 85 adds the cooled oil to the speed increasing box 30.

[0034] A fine filter 86 is also connected to the main oil pipe 85 to filter the oil entering the speed increasing box 30 .

[0035] The diameter of one of the two oil outlet pipes 83 is larger than the diameter of the other oil outlet pipe 83. The two oil outlet pipes 83 are defined as the main oil outlet pipe (large diameter oil outlet pipe 83) and the auxiliary oil outlet pipe (small diameter oil outlet pipe 83). When the compressor starts to run, the lubricating oil is supplied to the speed increasing box 30 through the auxiliary oil outlet pipe, that is, the oil pump 84 connected to the auxiliary oil outlet pipe sucks the oil, and after cooling through the oil cooler 81, it is filtered through the fine filter 86 and then delivered to the speed increasing box 30. When the oil pressure exceeds the set value, the oil pump 84 on the auxiliary oil outlet pipe stops working, and the lubricating oil is sucked through the oil pump 84 on the main oil outlet pipe, and after cooling through the oil cooler 81, it is filtered through the fine filter 86 and then delivered to the speed increasing box 30.

[0036] Secondly, an oil mist treatment device 87 is also connected to the oil pressure station 80. Specifically, the oil mist treatment device 87 of this embodiment uses an induced draft device to extract air, for example, an induced draft pipe 88 is used. The lower end of the induced draft pipe 88 is open, and the induced draft pipe 88 plays a similar role as exhausting air. A valve is provided on the induced draft pipe 88 to control the amount of air extracted, so that a large amount of oil mist generated by the operation of the oil cooling circulation system 8 enters the oil mist treatment device 87. At this time, the oil mist treatment device 87 separates and treats the oil mist.

[0037] Specifically, Fig. 9 As shown, the oil mist treatment device 87 includes a docking piece 870 connected to the oil pressure station 80 through a pipeline, the interior of the docking piece 870 at least has a conical cavity 8700 in a conical shape, the inner diameter of the conical cavity 8700 gradually increases from bottom to top, and an annular baffle 8701 extending radially inward from the docking piece 870 is provided at the top of the conical cavity 8700, and the conical cavity 8700 and the annular baffle 8701 form a turbulent area 8702, that is, the inner top side of the docking piece 870 has a turbulent area 8702; The annular baffle 8701 and the wall of the conical cavity 8700 form an acute angle, and the turbulent zone 8702 can form turbulent vortexes for the oil mist, making the oil mist separation process more thorough.

[0038] Secondly, an oil receiving pan 871 extending radially outward from the docking piece 870 is provided at the outer top of the docking piece 870, and an outer cover 872 having mesh holes on at least part of the side walls is provided on the oil receiving pan 871; a mesh cover 873 is provided at the top of the docking piece 870 or in the outer cover 872, which divides the internal space of the outer cover 872 into an inner separation cavity 8720 and an outer separation cavity 8721; the inner separation cavity 8720 is connected to the conical cavity 8700, a first filter screen 874 is provided in the inner separation cavity 8720, and a second filter screen 875 is provided in the outer separation cavity 8721 with a reserved space between the top and the inner top of the outer cover 872, and the lower end of the air duct 88 at least partially extends into the outer separation cavity 8721.

[0039] The air induced by the air induced pipe 88 forces the oil mist in the oil pressure station 80 to enter the conical cavity 8700, the inner separation cavity 8720 and the outer separation cavity 8721 upward in sequence, and the oil in the oil mist is separated through the turbulent area 8702, the first filter 874 and the second filter 875. Most of the separated oil flows downward from the conical cavity 8700 back to the oil pressure station 80, and the remaining separated oil is collected by the oil receiving pan 871, and then flows back to the conical cavity 8700 from the return bypass pipe 876 connecting the outer separation cavity 8721 and the conical cavity 8700.

[0040] Preferably, the mesh cover 873 is a honeycomb mesh cover, and the mesh cover 873 specifically includes an upright annular mesh tube 8730 fixed to the top of the docking piece 870, and a recessed portion 8731 connected to the top of the upright annular mesh tube 8730 and having a downward recessed center, and the lower end of the air duct 88 at least partially extends into the recessed area.

[0041] The concave sub-portion 8732 with the concave portion 8731 is located above the annular baffle 8701, and the annular baffle 8701 and the concave sub-portion 8732 form an annular communication space that is connected to the inner bottom side of the inner separation cavity 8720. That is, the shape of the inner separation cavity 8720 is approximately the Chinese character "concave", and the shape of the outer separation cavity 8721 is approximately the inverted Chinese character "concave".

[0042] The lower end of the first filter screen 874 is connected to the inner edge of the annular baffle 8701, the upper end of the first filter screen 874 is connected to the inner top of the recessed portion 8731, and the first filter screen 874 and the recessed sub-portion 8732 are spaced apart, and the first filter screen 874 and the vertical annular net cylinder 8730 are spaced apart. At the same time, the gap between the first filter screen 874 and the recessed sub-portion 8732 is smaller than the gap between the first filter screen 874 and the vertical annular net cylinder 8730. The recessed sub-portion 8732 includes a cylindrical portion and a bottom connected to the lower end of the cylindrical portion, and the recessed sub-portion 8732 is a non-porous structure. The distance between the bottom of the recessed portion 8731 and the oil receiving pan 871 is smaller than the distance between the bottom of the recessed portion 8731 and the inner top of the outer cover 872. Through this distance difference design, the lower end of the air duct 88 can be extended longer into the outer cover 872 to provide better air induced performance.

[0043] The recessed sub-portion 8732 forces the oil mist to flow in its radial direction and enter the inner separation cavity 8720, and the first filter 874 at this time separates the oil mist. In this process, the oil mist in the turbulent zone 8702 is forced to enter the inner separation cavity 8720 upward, and the oil mist flowing radially in the recessed sub-portion 8732 and the oil mist flowing upward from the turbulent zone 8702 form a "cross" flow state. In this process, the oil mists in different directions are mixed, so that the oil mist before entering the first filter 874 is already in a uniformly mixed state, so that most of the oil in the oil mist can be separated to the greatest extent under the filtration of the first filter 874, and then flow back downward from the conical cavity 8700 to the oil pressure station 80.

[0044] The filtering accuracy of the first filter 874 is higher than that of the second filter 875. For example, the first filter 874 is a fine filter, and the second filter 875 is a coarse filter. The number of meshes of the filter can be set by the user.

[0045] The first filter screen 874 and the second filter screen 875 are both annular screens, and the axial length of the first filter screen 874 is shorter than the axial length of the second filter screen 875 . However, there is a gap between the top of the second filter screen 875 and the inner top of the outer cover 872 .

[0046] Finally, the inner diameter of the first filter screen 874 is equal to or greater than the inner diameter of the annular baffle 8701 to prevent the oil mist from directly entering the first filter screen 874 in the wall thickness length direction of the first filter screen 874 .

[0047] The working principle of this embodiment is as follows: The air duct 88 is connected to an axial flow fan and the like to extract air so that the oil mist in the oil pressure station 80 enters the oil mist treatment device 87; The oil mist treatment device 87 performs multi-stage separation treatment on the oil mist so that the separated oil flows back from the oil mist treatment device 87 to the oil pressure station 80 .

[0048] As a preferred solution, Fig.10 As shown, a partition 89 is provided in the middle and lower part of the conical cavity 8700 to cover the connection between the conical cavity 8700 and the reflux bypass pipe 876, and a spiral guide channel 890 is formed between the partition 89 and the inner wall of the conical cavity 8700. In this way, the recovered oil and the oil mist entering the oil mist treatment device of this embodiment can be isolated to prevent the upward hot oil mist from directly exchanging heat with the recovered oil, which would cause part of the recovered oil to re-enter the oil mist treatment device of this embodiment.

[0049] And the partition 89 is made of aluminum material. The spiral guide channel 890 in this embodiment combined with the partition 89 made of aluminum material can form an indirect heat exchange between the recovered oil and the oil mist to reduce the temperature of the oil mist so that part of the oil mist can be cooled down and retained on the partition 89, thereby directly refluxed, which can invisibly improve the oil mist treatment efficiency.

[0050] Specifically, the partition 89 of this embodiment includes a conical partition upper portion 891 and an annular partition lower portion 892 connected to the lower end of the conical partition upper portion 891, and the conical partition upper portion 891 can play the role of guiding and expanding pressure. The annular partition lower portion 892 is welded to the flange at the lower end of the docking piece 870.

[0051] In this embodiment, it is composed of an air duct, a multi-pass filter screen, and an outer cover. The air duct creates a micro vacuum inside the oil mist treatment device. For example, the oil mist in the oil tank is filtered through the filter screen, and most of the oil is returned to the oil tank after filtration. Part of the overflowing oil mist continues to be filtered through the coarse filter screen and returns to the oil tank through the return pipe. The design of multi-pass filtration effectively ensures that the oil mist does not overflow, and since the vacuum formed by suction can assist in oil return, the smooth return of oil helps to seal the oil system of the equipment, so it can have multiple benefits.

[0052] Secondly, a plurality of inner convex pieces are provided on the inner surface of the partition layer 89 and are distributed in a circumferential manner and arranged along the vertical direction, and a long groove is formed between two adjacent inner convex pieces for heat exchange and guiding the oil mist.

[0053] Embodiment 2

[0054] Based on the first embodiment, Figure 1-Figure 3As shown, the compressor includes a compressor body 1 and an oil cooling circulation system of the compressor of Example 1. The compressor has an inlet 10 and an outlet 11. Vinyl chloride that needs to do work enters from the inlet 10, and the vinyl chloride after doing work is discharged from the outlet 11. A plurality of working units 2 whose gas paths are connected in series in sequence are provided on the compressor body 1. The plurality of working units 2 are all impeller-type rotating working units and are driven to do work by the same driving mechanism 3. There are 2-4 working units 2.

[0055] A sealer 4 is provided at the rotary connection between the impeller rotating shaft of each working unit 2 and the compressor body 1, and each working unit 2 and the compressor body 1 form an isobaric cavity K at one end of the sealer 4 close to the compressor body 1, and the sealer 4 is any one of a carbon ring sealer and a rubber sealer. For example, an inert gas with pressure is injected into the isobaric cavity K, and the air pressure in the isobaric cavity K is equal to the air pressure of the vinyl chloride leaked from the working unit 2. When the working unit 2 works, part of the leaked vinyl chloride and part of the gas in the isobaric cavity K enter the sealer 4 from both ends of the sealer 4 respectively, and the leaked vinyl chloride and the gas entering the sealer 4 form a convection state. The formed convection state can stop the leaked vinyl chloride from leaking in the sealer 4, and when the sealing performance of the sealer 4 decreases, due to the equal air pressure setting in this embodiment, the leakage of vinyl chloride can still be avoided, which can achieve the purpose of long-term use, avoid the phenomenon of frequent replacement of the sealer, ensure the safety of vinyl chloride transportation and work, and reduce the maintenance cost and difficulty of the compressor.

[0056] And this method of the embodiment can make it unnecessary for the impeller to be manufactured in a closed manner, so as to further reduce the manufacturing cost and save the sealing cost at the impeller.

[0057] Secondly, at least part of the isobaric cavity K and the sealer 4 are vertically distributed at one end close to the compressor body 1. Due to the vertical state of at least part of the cavity, at least part of the isobaric cavity K can form a leaking vinyl chloride cutoff to prevent the leaking vinyl chloride from continuing to leak along the axial direction of the impeller rotating shaft.

[0058] In order to achieve pressure control, Figure 5As shown, a pressure sensor K1 is provided in the isobaric cavity K, and the isobaric cavity K is connected to the air pressure regulating system 5, and the pressure sensor K1 and the air pressure regulating system 5 are respectively connected to the controller 6. The pressure sensor K1 detects the air pressure in the isobaric cavity K, and if the pressure of the leaked vinyl chloride gas is higher than the air pressure in the isobaric cavity K, the pressure in the isobaric cavity K will increase, and the controller 6 starts the air pressure regulating system 5 after receiving the signal, and inputs the gas equal to the pressure of the leaked vinyl chloride gas into the isobaric cavity K to form an equal equilibrium pressure. Each isobaric cavity K is respectively provided with a discharge valve, and when the vinyl chloride stops entering the compressor, the discharge valve is opened, and the gas in the isobaric cavity K and the leaked vinyl chloride gas are discharged from the discharge valve and collected to prevent the gas in the isobaric cavity K from entering the working unit 2.

[0059] In a preferred embodiment, a vinyl chloride detection sensor is provided at one end of the sealer 4 close to the impeller, and an inert gas detection sensor is provided at one end of the sealer 4 close to the compressor body 1 to detect whether the leaked vinyl chloride gas and the gas in the isobaric cavity K are in an isobaric state. The vinyl chloride detection sensor and the inert gas detection sensor are respectively connected to the controller 6, and in this embodiment, they are connected by wireless communication.

[0060] The air pressure regulating system 5 is, for example, a booster pump and other components, and the controller 6 is, for example, a commercially available PLC controller.

[0061] As a preferred solution of this embodiment, Figure 2 and Figure 4 As shown, there are three working units 2 in this embodiment, and the gas paths of the three working units 2 are connected in sequence to achieve the purpose of gradual pressurization. Each working unit 2 includes a volute 20 and an impeller 21 located in the volute 20, wherein two impellers 21 are connected to the first impeller rotating shaft 22, and the remaining impeller 21 is connected to the second impeller rotating shaft 23. The volute 20 and the side of the compressor body 1 are connected through an annular seal 24, and a small gap 28 is formed at the outer ends of the volute 20 and the annular seal 24. A sealer 4 is respectively sleeved on the first impeller rotating shaft 22 and the second impeller rotating shaft 23, and one end of the sealer 4 away from the compressor body 1 is fixed to the annular seal 24, and the annular seal 24 and the side of the compressor body 1 form an isobaric cavity K. The isobaric cavity K is formed in this way in this embodiment, which can greatly increase the volume of the isobaric cavity K, and solves the technical difficulty of the prior art that the small sealing space between the sealer and the impeller rotating shaft leads to a high production difficulty.

[0062] The inner diameter of the annular seal 24 can be adjusted to form isobaric cavities K of different volumes. For example, there are three isobaric cavities K in this embodiment. According to the pressurization process of the three working units 2, the volumes of the three isobaric cavities K gradually increase to resist the pressure of the leaked vinyl chloride gas after continuous pressurization.

[0063] Furthermore, the sealer 4 on the first impeller rotating shaft 22 is rotationally sealedly connected to the first impeller rotating shaft 22, for example, sealed by a concave-convex fit (sealing lip) manner; the sealer 4 sleeved on the second impeller rotating shaft 23 is rotationally sealedly connected to the second impeller rotating shaft 23, for example, sealed by a concave-convex fit (sealing lip) manner.

[0064] Furthermore, a positioning step 25 is provided at the end of the annular seal 24 away from the compressor body 1, and an annular boss 26 is provided at the end of the sealer 4 away from the compressor body 1. The annular boss 26 is fixed to the positioning step 25, and the two are fixed by bolts. Of course, spring washers, etc. can be added to the bolts to prevent the bolts from loosening.

[0065] The first impeller rotating shaft 22 and the second impeller rotating shaft 23 are respectively connected to the compressor body 1 for rotation. The side of the compressor body 1 is provided with oil seal rings 7 respectively sleeved on the first impeller rotating shaft 22 and the second impeller rotating shaft 23. The oil seal rings 7 and the corresponding sealers 4 are arranged at intervals. A plurality of blocking rings 27 are respectively arranged on the first impeller rotating shaft 22 and the second impeller rotating shaft 23. A plurality of sealing lips 70 are respectively arranged on the inner wall of the corresponding oil seal ring 7. The inner side of some of the sealing lips 70 is provided with a first annular inclined surface arranged inwardly, and the outer side of the remaining sealing lips 70 is provided with a second annular inclined surface arranged inwardly. The first annular inclined surface and the second annular inclined surface form an eight-shaped distribution, and some of the sealing lips 70 are located in the axial space formed by two adjacent blocking rings 27.

[0066] At least one blocking ring 27 has a third annular inclined surface, and at least a portion of the first annular inclined surface is sealed with the third annular inclined surface, so as to solve the problem of leakage of the isobaric cavity K from the oil seal ring 7.

[0067] Embodiment 3

[0068] Based on the second embodiment, Figure 2 and Figure 6As shown, this embodiment provides a specific example, for example, there are three working units 2 and they are defined as the first working unit 2A, the second working unit 2B and the third working unit 2C, the air pressure after the first working unit 2A does work is less than the air pressure after the second working unit 2B does work, and the air pressure after the second working unit 2B does work is less than the air pressure after the third working unit 2C does work. And the driving mechanism 3 includes a speed increaser 30 arranged on the compressor body 1, a driving shaft 31 is rotatably connected in the speed increaser 30, the first impeller rotating shaft 22 and the second impeller rotating shaft 23 are parallel to each other and the driving shaft 31 is located between the first impeller rotating shaft 22 and the second impeller rotating shaft 23, the driving shaft 31 and the first impeller rotating shaft 22 are connected by a first gear transmission structure 32, and the driving shaft 31 and the second impeller rotating shaft 23 are connected by a second gear transmission structure 33. The first gear transmission structure 32 and the second gear transmission structure 33 are both two gears meshing with each other. Of course, a common gear can be set on the driving shaft 31, which can also meet the driving requirements.

[0069] The driving shaft 31 is connected to the motor.

[0070] The purpose of continuous pressurization can be achieved by continuously reducing the internal flow channel of the volute 20. As can be seen from the drawings of this embodiment, the internal flow channel of the volute 20 is continuously reduced.

[0071] In addition, at the first working unit 2A, the sealer 4 uses a labyrinth sealer, and at the second and third working units 2B / 2C, the sealer 4 uses a carbon ring sealer to meet the requirements of continuous pressurization and ensure service life.

[0072] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0073] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An oil mist treatment device for a compressor, characterized in that: The oil mist treatment device comprises a docking piece (870) having a turbulent flow area (8702) on the inner top side, an oil receiving pan (871) extending radially outward from the docking piece (870) is provided on the outer top of the docking piece (870), an outer cover (872) having mesh holes on at least part of the side wall is provided on the oil receiving pan (871), and a space for dividing the inner space of the outer cover (872) into inner separation cavities (870) is provided on the top of the docking piece (870) or in the outer cover (872). A mesh cover (873) is provided for the inner separation cavity (8720) and the outer separation cavity (8721), a first filter screen (874) is provided in the inner separation cavity (8720), a second filter screen (875) is provided in the outer separation cavity (8721) with a top and a reserved space at the inner top of the outer cover (872), the oil receiving pan (871) and the docking piece (870) are connected via a reflux bypass pipe (876), and at least a portion of the air inducer extends into the outer separation cavity (8721).

2. The oil mist treatment device for a compressor according to claim 1, characterized in that: The interior of the docking piece (870) has at least a conical cavity (8700) in the shape of a cone, the inner diameter of the conical cavity (8700) gradually increases from bottom to top, and an annular baffle (8701) extending radially inward from the docking piece (870) is provided at the top of the conical cavity (8700), the conical cavity (8700) and the annular baffle (8701) forming the turbulent zone (8702).

3. The oil mist treatment device for a compressor according to claim 2, characterized in that: The annular baffle (8701) and the cavity wall of the conical cavity (8700) form an acute angle.

4. The oil mist treatment device for a compressor according to claim 1, characterized in that: The mesh cover (873) is a honeycomb mesh cover.

5. The oil mist treatment device for a compressor according to claim 2 or 4, characterized in that: The mesh cover (873) comprises an upright annular mesh cylinder (8730) fixed to the top of the docking member (870), and a recessed portion (8731) connected to the top of the upright annular mesh cylinder (8730) and having a center that is recessed downward, the air inducer is an air duct (88), and at least a portion of the air duct (88) extends into the recessed portion (8731).

6. The oil mist treatment device for a compressor according to claim 5, characterized in that: The recessed sub-portion (8732) with the recessed portion (8731) is located above and to the side of the annular baffle (8701), and the annular baffle (8701) and the recessed sub-portion (8732) form an annular connecting space connected to the inner bottom side of the inner separation cavity (8720).

7. The oil mist treatment device for a compressor according to claim 6, characterized in that: The lower end of the first filter screen (874) is connected to the inner edge of the annular baffle (8701), the upper end of the first filter screen (874) is connected to the inner top of the recessed portion (8731), and the first filter screen (874) and the recessed sub-portion (8732) are spaced apart, and the first filter screen (874) and the upright annular mesh cylinder (8730) are spaced apart.

8. The oil mist treatment device for a compressor according to claim 7, characterized in that: The gap between the first filter screen (874) and the recessed sub-portion (8732) is smaller than the gap between the first filter screen (874) and the upright annular screen cylinder (8730).

9. An oil cooling circulation system for a compressor, the oil cooling circulation system being used to connect an oil pressure station (80) of a compressor and a speed increasing gearbox (30), characterized in that: The oil cooling circulation system comprises an oil mist treatment device of the compressor according to any one of claims 1 to 8 connected to the oil pressure station (80), and the oil cooling circulation system also comprises an oil cooler (81), the oil pressure station (80) is connected to the oil cooler (81) through two parallel oil outlet pipes (83), an oil pump (84) is installed on each of the oil outlet pipes (83), the diameter of one of the two oil outlet pipes (83) is larger than the diameter of the other oil outlet pipe (83), the oil cooler (81) is connected to the speed increaser (30) through a main oil pipe (85), and the oil pressure station (80) is connected to the speed increaser (30) through an oil return pipe (82).

10. A compressor, characterized in that The compressor comprises the oil cooling circulation system of the compressor according to claim 9.

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