CN107882728B - Rotary vane compressor and pump body assembly thereof - Google Patents
Rotary vane compressor and pump body assembly thereof Download PDFInfo
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- CN107882728B CN107882728B CN201711036548.1A CN201711036548A CN107882728B CN 107882728 B CN107882728 B CN 107882728B CN 201711036548 A CN201711036548 A CN 201711036548A CN 107882728 B CN107882728 B CN 107882728B
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- pressure oil
- pump body
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 244000126211 Hericium coralloides Species 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 9
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000001603 reducing effect Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/023—Lubricant distribution through a hollow driving shaft
Abstract
The invention provides a rotary vane compressor and a pump body assembly thereof. The pump body assembly of the rotary vane compressor comprises a main shaft (1), a cylinder (2) and a roller (3), wherein a main oil way (4) axially penetrating the main shaft (1) is arranged on the main shaft (1), the roller (3) is rotatably arranged in the cylinder (2), an inner cavity of the cylinder (2) is divided into an air suction section and an air discharge section, a plurality of sliding vane grooves (6) are formed in the roller (3) along the circumferential direction, sliding vanes (5) are arranged in the sliding vane grooves (6) in a sliding manner, a back pressure oil cavity (7) is formed at the bottom of the sliding vane grooves (5) and the bottom of the sliding vane grooves (6), and a throttle oil way is connected to the back pressure oil cavity (7) positioned in the air suction section. According to the pump body component of the rotary vane compressor, friction between the head part of the sliding vane of the suction section and the inner wall of the cylinder can be reduced, and friction power consumption in the running process of the compressor is reduced.
Description
Technical Field
The invention belongs to the technical field of compressor equipment, and particularly relates to a rotary vane compressor and a pump body assembly thereof.
Background
In the running process of the rotary vane compressor, the tail part of the sliding vane needs larger pressure so as to ensure that the sliding vane is not separated from the cylinder. The tail part of the sliding vane of the existing rotary vane compressor is filled with high-pressure oil so as to ensure that the sliding vane is not separated from the cylinder in the exhaust stage. When the sliding vane slides to the suction section, the suction section at the head of the sliding vane is low pressure, and the tail of the sliding vane is high pressure, so that the friction between the head of the sliding vane at the suction section and the inner wall of the cylinder is large, and the friction power consumption is large in the running process of the compressor.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide the rotary vane compressor and the pump body assembly thereof, so that friction between the head part of the sliding vane of the suction section and the inner wall of the cylinder can be reduced, and friction power consumption in the running process of the compressor is reduced.
In order to solve the problems, the invention provides a pump body assembly of a rotary vane compressor, which comprises a main shaft, a cylinder and a roller, wherein a main oil way which axially penetrates through the main shaft is arranged on the main shaft, the roller is rotatably arranged in the cylinder, an inner cavity of the cylinder is divided into an air suction section and an air discharge section, the roller is circumferentially provided with a plurality of sliding vane grooves, sliding vanes are arranged in the sliding vane grooves in a sliding manner, a back pressure oil cavity is formed between the sliding vane and the bottom of the sliding vane groove, and a throttle oil way is connected to the back pressure oil cavity positioned in the air suction section.
Preferably, the main shaft is further provided with a first side oil hole for conveying oil of the main oil passage to the outer peripheral side of the main shaft, and the first side oil hole is communicated with the back pressure oil chamber located in the suction section through a throttle oil passage.
Preferably, the pump body assembly further comprises an upper flange sleeved outside the main shaft, an oil path gap is formed between the upper flange and the main shaft, and the oil path gap forms a throttling oil path.
Preferably, the pump body assembly further comprises an upper flange sleeved outside the main shaft, wherein a comb tooth structure is formed on the inner wall surface of the upper flange, and the comb tooth structure forms a throttling oil path.
Preferably, rong Youcao communicated with the first side oil hole is arranged on the inner wall of the upper flange, and the first side oil hole is communicated with the throttling oil passage through the oil containing groove.
Preferably, a first back pressure oil groove is arranged on the end face of the upper flange, corresponding to the back pressure oil cavity of the air suction section, and the back pressure oil cavity is communicated with the first back pressure oil groove when rotating to the air suction section.
Preferably, the first back pressure oil groove comprises a first arc-shaped section and a second arc-shaped section which are sequentially arranged along the rotation direction of the roller, the first arc-shaped section is communicated with the second arc-shaped section, and the radial width of the first arc-shaped section is smaller than that of the second arc-shaped section.
Preferably, the pump body assembly further comprises an upper flange sleeved outside the main shaft, the main shaft is further provided with a first side oil hole for conveying oil of the main oil way to the outer peripheral side of the main shaft, the first side oil hole is communicated with the back pressure oil cavity of the exhaust section, the upper flange is provided with a throttling oil way, and the back pressure oil cavity of the exhaust section is communicated with the back pressure oil cavity of the air suction section through the throttling oil way.
Preferably, the upper flange is provided with a first oil hole and a second oil hole, the second oil hole is communicated with the back pressure oil cavity of the exhaust section, the first oil hole is communicated with the back pressure oil cavity of the air suction section, and a throttle pipe is connected between the first oil hole and the second oil hole and forms a throttle oil path.
Preferably, the first oil hole and the second oil hole penetrate through the upper flange along the axial direction, and the throttle pipe is connected to one end, far away from the cylinder, of the first oil hole and the second oil hole.
Preferably, the restriction is a capillary tube; or, a throttle valve is arranged on the throttle pipe.
Preferably, the upper flange is provided with first back pressure oil groove and second back pressure oil groove along circumference interval on the terminal surface of roller towards, and first back pressure oil groove corresponds to the back pressure oil pocket setting of suction zone, and the second back pressure oil groove corresponds to the back pressure oil pocket setting of exhaust zone, and first oilhole communicates to first back pressure oil groove, and second oilhole communicates to second back pressure oil groove.
Preferably, the second back pressure oil groove comprises an oil storage section and an oil holding section which are sequentially arranged along the rotation direction of the roller, the cross section area of the flow section of the oil storage section is larger than that of the oil holding section, and the second oil hole is communicated to the oil holding section.
Preferably, the pump body assembly further comprises a lower flange, the main shaft is further provided with a second side oil hole communicated with the main oil way, the second side oil hole is communicated to the outer side wall of the main shaft, and the second side oil hole is communicated with the back pressure oil cavity located in the air suction section through a throttling oil way.
According to another aspect of the present invention, there is provided a vane compressor including a pump body assembly as described above.
The invention provides a pump body component of a rotary vane compressor, which comprises a main shaft, a cylinder and a roller, wherein a main oil way which axially penetrates through the main shaft is arranged on the main shaft, the roller is rotatably arranged in the cylinder, an inner cavity of the cylinder is divided into an air suction section and an air discharge section, the roller is circumferentially provided with a plurality of sliding vane grooves, sliding vanes are arranged in the sliding vane grooves in a sliding manner, a back pressure oil cavity is formed at the bottom of the sliding vane and the bottom of the sliding vane groove, and a throttle oil way is connected at the back pressure oil cavity of the air suction section. The pump body component is connected with the throttling oil way at the back pressure oil cavity of the air suction section, so that when oil flows into the back pressure oil cavity of the air suction section, the oil can flow through the throttling oil way to perform throttling and depressurization, the oil pressure in the back pressure oil cavity of the air suction section is reduced, the pressure applied to the tail part of the sliding vane of the air suction section by the oil in the back pressure oil cavity of the air suction section is reduced, the friction power consumption of the head part of the sliding vane of the air suction section and the inner wall surface of the air cylinder is reduced on the basis that the sliding vane is not separated from the air cylinder, and the performance of the compressor is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a pump body assembly of a vane compressor in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of a cylinder and roller mating structure of a pump body assembly of a vane compressor in accordance with an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of the upper flange of the pump body assembly of the first embodiment of the present invention;
FIG. 4 is a schematic bottom view of the upper flange of the pump body assembly of the first embodiment of the present invention;
FIG. 5 is a schematic perspective view of an upper flange of a pump body assembly according to a first embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of the upper flange of the pump body assembly of the second embodiment of the present invention;
FIG. 7 is a schematic bottom view of the upper flange of the pump body assembly of the second embodiment of the present invention;
FIG. 8 is a schematic perspective view of an upper flange of a pump body assembly according to a second embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of the upper flange of the pump body assembly of the third embodiment of the present invention;
FIG. 10 is a schematic bottom view of an upper flange of a pump body assembly according to a third embodiment of the present invention;
FIG. 11 is a schematic perspective view of an upper flange of a pump body assembly according to a third embodiment of the present invention;
FIG. 12 is a schematic view of the lower flange of the pump body assembly of the embodiment of the present invention.
The reference numerals are expressed as:
1. a main shaft; 2. a cylinder; 3. a roller; 4. a main oil path; 5. a sliding sheet; 6. a slide groove; 7. a back pressure oil chamber; 8. a first side oil hole; 9. an upper flange; 10. an oil path gap; 11. a comb structure; 12. rong Youcao; 13. a first back pressure oil groove; 14. a first arcuate segment; 15. a second arcuate segment; 16. a first oil hole; 17. a second oil hole; 18. a throttle tube; 19. a second back pressure oil groove; 20. an oil storage section; 21. a suffocating oil section; 22. a lower flange; 23. a second side oil hole; 24. a third back pressure oil groove; 25. a fourth back pressure oil groove; 26. a straight oil groove; 27. an oil pump.
Detailed Description
Referring to fig. 1 to 12 in combination, according to an embodiment of the present invention, a pump body assembly of a vane compressor includes a main shaft 1, a cylinder 2 and a roller 3, a main oil passage 4 axially penetrating the main shaft 1 is provided on the main shaft 1, the roller 3 is rotatably provided in the cylinder 2, an inner cavity of the cylinder 2 is divided into an intake section and an exhaust section, the roller 3 is circumferentially provided with a plurality of vane grooves 6, a vane 5 is slidably provided in the vane grooves 6, a back pressure oil chamber 7 is formed at the bottom of the vane 5 and the vane grooves 6, and a throttle oil passage is connected to the back pressure oil chamber 7 at the intake section.
The pump body component is connected with a throttle oil way at the back pressure oil cavity 7 of the air suction section, so that when oil flows into the back pressure oil cavity 7 rotating to the air suction section, the oil can flow through the throttle oil way to throttle and reduce the pressure of the oil in the back pressure oil cavity 7 entering the air suction section, the pressure of the oil in the back pressure oil cavity 7 of the air suction section applied to the tail part of the sliding vane 5 of the air suction section is reduced, the tail part of the sliding vane 5 is controlled by the sectional pressure according to the different positions of the working section where the sliding vane 5 is positioned, the lower pressure is provided for the tail part of the sliding vane 5 of the air suction section, the pressure difference borne by the sliding vane 5 in the air suction section is reduced, the force exerted on the cylinder 2 by the head part of the sliding vane 5 is reduced, the friction power consumption of the head part of the sliding vane 5 of the air suction section and the inner wall surface of the cylinder 2 is reduced on the basis that the sliding vane 5 is not separated from the cylinder 2 is ensured, and the performance of the compressor is improved.
When the compressor is operated, the slide 5 is extended from the slide groove 6 by centrifugal force and back pressure along with the rotation of the main shaft 1, and is contacted with the inner wall surface of the cylinder 2. With smooth operation of the compressor, the slide 5 starts to reciprocate in the slide groove 6. The 3 sliding sheets 5 divide the whole crescent cavity into 3 independent chambers, and the 3 chambers are periodically expanded and contracted, so that the suction and the exhaust of the compressor are realized.
During the movement of the compressor, the slide 5 and the slide groove 6 form a closed space, which is called a back pressure oil cavity 7, and the back pressure oil cavity 7 is also three, and the back pressure oil cavity is periodically enlarged and reduced along with the operation of the compressor. Along with the change of the rotation position of the roller 3, the rotation position of the back pressure oil cavity 7 in the cylinder 2 is also changed, when the back pressure oil cavity 7 is positioned in an air suction section in the cylinder 2, the back pressure oil cavity 7 is communicated with a throttling oil path to perform throttling and depressurization, the oil pressure in the back pressure oil cavity 7 is reduced, when the back pressure oil cavity 7 is positioned in an air discharge section in the cylinder 2, the back pressure oil cavity 7 is disconnected with the throttling oil path, the oil pressure in the back pressure oil cavity 7 is higher and is matched with the pressure in an air discharge cavity, the slide sheet 5 is prevented from being separated from contact with the inner wall surface of the cylinder 2 under the pressure of the air discharge cavity of the cylinder 2, and the stable and reliable operation of the compressor is ensured.
An oil pump 27 is arranged at the lower part of a main shaft 1 of the pump body assembly, the oil pump 27 is immersed in an oil pool at the bottom of the compressor, the main shaft 1 rotates to drive the oil pump to rotate, the oil pump is a positive displacement pump, and under the action of the oil pump 27, oil enters a main oil passage 4 on the main shaft 1 from the oil pool.
As shown in fig. 3 to 5 in combination, according to the first embodiment of the present invention, the main shaft 1 is further provided with a first side oil hole 8 that delivers oil of the main oil passage 4 to the outer peripheral side of the main shaft 1, and the first side oil hole 8 communicates with the back pressure oil chamber 7 located at the suction section through a throttle oil passage. When the oil reaches the first side oil hole 8 through the main oil way 4, the oil enters the back pressure oil cavity 7 positioned in the air suction section through the throttling oil way from the first side oil hole 8, and the oil is throttled and depressurized through the throttling oil way, so that the pressure of the oil entering the back pressure oil cavity 7 in the air suction section is smaller, the pressure applied to the sliding vane 5 is also smaller, the friction between the head part of the sliding vane 5 and the inner wall of the cylinder 2 can be reduced, and the friction loss between the sliding vane 5 and the cylinder 2 is reduced.
In this embodiment, the pump body assembly further includes an upper flange 9 sleeved outside the main shaft 1, an oil path gap 10 is formed between the upper flange 9 and the main shaft 1, and the oil path gap 10 forms a throttling oil path. An oil path gap 10 is formed between the upper flange 9 and the main shaft 1, and the oil path gap 10 extends from the first side oil hole 8 to the back pressure oil cavity 7 of the air suction section, so that oil throttled by the oil path gap 10 is conveyed into the back pressure oil cavity 7 for oil supplement. The oil path gap 10 can be a strip-shaped groove with uniform thickness, an arc-shaped groove or other gap structures which can play roles in throttling and reducing pressure.
The oil passage gap 10 is provided on the upper flange 9, and extends from the side of the upper flange 9 facing the main shaft 1 to the end surface of the upper flange 9 facing the cylinder 2, thereby forming a continuous oil passage gap, and ensuring that the oil smoothly enters the back pressure oil chamber 7. Of course, the oil path gap 10 can form grooves with different depths on one side of the upper flange 9 facing the main shaft 1 and the end surface of the upper flange 9 facing the cylinder 2, and only the effective depressurization of the oil in the back pressure oil cavity 7 entering the air suction section is ensured. The depth of the groove can be correspondingly adjusted according to the degree of depressurization, so that the friction loss of the compressor is small, and meanwhile, the running stability of the compressor is reliable.
Preferably, an oil receiving groove 12 communicating with the first side oil hole 8 is provided on the inner wall of the upper flange 9, and the first side oil hole 8 communicates with the throttle oil passage through the oil receiving groove 12. The oil containing groove 12 can store the oil in the first side oil hole 8, so that the oil can conveniently flow into the back pressure oil cavity 7 through the throttling oil way, and meanwhile, when the back pressure oil cavity 7 is not communicated with the throttling oil way, the oil can be stably stored in the oil containing groove 12, and the oil supply of the main oil way 4 is not greatly influenced.
Preferably, a first back pressure oil groove 13 is provided on the end face of the upper flange 9 corresponding to the back pressure oil chamber 7 of the suction section, and the back pressure oil chamber 7 communicates with the first back pressure oil groove 13 when rotated to the suction section. The first back pressure oil groove 13 extends along the rotation direction of the roller 3 and is communicated with the throttling oil way, so that the back pressure oil cavity 7 positioned in the air suction section is always communicated with the throttling oil way in the whole air suction section, the oil supply of the back pressure oil cavity 7 in the whole air suction section volume increasing process is ensured, the oil supply shortage in the back pressure oil cavity 7 is avoided, and the stability and the reliability of the compressor in operation are improved.
In the present embodiment, the first back pressure oil groove 13 includes a first arc segment 14 and a second arc segment 15 that are sequentially provided along the rotation direction of the roller 3, the first arc segment 14 and the second arc segment 15 are communicated, and the radial width of the first arc segment 14 is smaller than the radial width of the second arc segment 15. When the back pressure oil chamber 7 rotates to the suction section, the volume is gradually increased, and since the oil pressure in the back pressure oil chamber 7 is still larger in the process of rotating the back pressure oil chamber 7 from the exhaust section to the suction section, the communication area between the back pressure oil chamber 7 and the throttle oil path can be reduced by setting the radial width of the first arc-shaped section 14 which is in contact with the back pressure oil chamber 7 first smaller, so that the oil pressure supplied to the first back pressure oil chamber 13 by the throttle oil path and the oil pressure in the back pressure oil chamber 7 can be stably mixed, and larger pressure fluctuation can not occur. After the back pressure oil cavity 7 rotates a certain angle in the air suction section, the oil pressure in the back pressure oil cavity 7 and the oil pressure in the first back pressure oil groove 13 are balanced, and the volume of the back pressure oil cavity 7 is increased in the rotating process of the air suction section, so that the back pressure oil cavity 7 can be contacted with the second arc-shaped section 15 with larger radial width, the oil supply quantity to the back pressure oil cavity 7 is increased, the oil filling in the back pressure oil cavity 7 is ensured, and the stable operation of the sliding vane is ensured.
The upper flange 9 still is provided with second back pressure oil groove 19 towards the terminal surface of roller 3 on, and first back pressure oil groove 13 and second back pressure oil groove 19 set up along the terminal surface circumference interval of upper flange 9, and second back pressure oil groove 19 corresponds the back pressure oil pocket 7 setting of exhaust section, and second back pressure oil groove 19 and first side oilhole 8 or hold the oil groove 12 intercommunication to can rotate to the exhaust section in-process at back pressure oil pocket 7, unnecessary fluid in the back pressure oil pocket 7 can be through the discharge of second back pressure oil groove 19 to first side oilhole 8 or hold in the oil groove 12, guarantee the smooth circulation of fluid.
Preferably, the second back pressure oil groove 19 includes an oil storage section 20 and an oil holding section 21 sequentially arranged along the rotation direction of the roller 3, wherein the cross-sectional area of the flow cross-section of the oil storage section 20 is larger than that of the oil holding section 21, and the oil holding section 21 is communicated to the first side oil hole 8 or the oil containing groove 12. When the back pressure oil cavity 7 of the sliding vane 5 rotates to the exhaust section, the volume of the back pressure oil cavity 7 is gradually reduced, oil in the back pressure oil cavity 7 is extruded, the oil enters the first side oil hole 8 or the oil containing groove 12 from the oil holding section 21, and the oil pressure in the back pressure oil cavity 7 can not be increased because the cross-sectional area of the flow cross-section of the oil holding section 21 is smaller than that of the oil storage section 20, and the oil in the back pressure oil cavity 7 can not be timely discharged to the first side oil hole 8 or the oil containing groove 12. Because the gas exhaust pressure that the gleitbretter head can receive slightly to be higher than the exhaust back pressure in the exhaust stage, consequently the pressure of gleitbretter afterbody needs more than or equal to gas exhaust pressure just can avoid the gleitbretter to break away from the cylinder this moment, and the effect of holding oil can play to hold oil section 21, consequently can improve the back pressure in the back pressure oil pocket 7, in simultaneously the oil groove 12 is held to the oil groove 12 of upper flange 9 with the oil in the gleitbretter groove 6 through the oilhole on holding oil section 21, in this in-process, because the great oil pressure has been kept in back pressure oil pocket 7, consequently can guarantee that the pressure of gleitbretter afterbody is more than or equal to gas exhaust pressure, effectively avoid gleitbretter 5 to break away from cylinder 2.
The pump body assembly can ensure the oil supply of the back pressure groove while ensuring the sectional control of the back pressure of the sliding vane groove, and can reduce the influence of the back pressure of the sliding vane groove of the compressed exhaust section on the back pressure of the sliding vane groove of the suction section.
Referring to fig. 6 to 8 in combination, according to a second embodiment of the present invention, which is substantially the same as the first embodiment, except that in this embodiment, the pump body assembly further includes an upper flange 9 sleeved outside the main shaft 1, a comb tooth structure 11 is formed on an inner wall surface of the upper flange 9, and the comb tooth structure 11 forms a throttle oil path. Because the pump body component forms the comb tooth structure 11 which can be used as a throttling oil path on the inner wall surface of the upper flange 9, the oil path gap in the first embodiment can be saved, the oil entering the first back pressure oil groove 13 is throttled and depressurized through the comb teeth of the comb tooth structure 11, and the oil pressure entering the back pressure oil cavity 7 of the air suction section is ensured to be smaller than the oil pressure in the first side oil hole 8.
Referring to fig. 9 to 11 in combination, according to the third embodiment of the present invention, the pump body assembly further includes an upper flange 9 sleeved outside the main shaft 1, the main shaft 1 is further provided with a first side oil hole 8 for delivering oil of the main oil passage 4 to the outer peripheral side of the main shaft 1, the first side oil hole 8 is communicated with the back pressure oil chamber 7 of the exhaust section, a throttle oil passage is provided on the upper flange 9, and the back pressure oil chamber 7 of the exhaust section is communicated with the back pressure oil chamber 7 of the suction section through the throttle oil passage. In this embodiment, the oil path gap in the first embodiment is eliminated, the oil discharged from the back pressure oil chamber 7 of the exhaust section is directly utilized to perform throttling depressurization and then discharged into the back pressure oil chamber 7 of the suction section, and the back pressure oil chamber 7 of the suction section is replenished with oil, so that in this embodiment, a throttling oil path is arranged between the back pressure oil chamber 7 of the exhaust section and the back pressure oil chamber 7 of the suction section, so that the oil discharged into the suction section through the exhaust section is depressurized, the oil pressure in the back pressure oil chamber 7 of the suction section is smaller than the oil pressure in the back pressure oil chamber 7 of the exhaust section, the pressure of the sliding vane 5 by the oil pressure in the back pressure oil chamber 7 of the suction section is reduced, and meanwhile, the oil is more fully utilized.
Preferably, the upper flange 9 is provided with a first oil hole 16 and a second oil hole 17, the second oil hole 17 is communicated with the back pressure oil cavity 7 of the exhaust section, the first oil hole 16 is communicated with the back pressure oil cavity 7 of the suction section, a throttle pipe 18 is connected between the first oil hole 16 and the second oil hole 17, and the throttle pipe 18 forms a throttle oil path. After being extruded from the back pressure oil cavity 7 of the exhaust section, the oil enters the throttle pipe 18 through the second oil hole 17 under the action of pressure difference to throttle and reduce pressure, and then enters the back pressure oil cavity 7 of the suction section through the first oil hole 16 to supplement the back pressure oil cavity 7 of the suction section.
In the present embodiment, the first oil hole 16 and the second oil hole 17 each penetrate the upper flange 9 in the axial direction, and the throttle pipe 18 is connected to the ends of the first oil hole 16 and the second oil hole 17 that are away from the cylinder 2. The throttle pipe 18 is positioned in the shell of the compressor, and the upper end part of the upper flange 9 is a larger cavity, so that the structure of the throttle pipe 18 can be modified according to the needs, the modification space is larger, and more oil pressure adjustment requirements can be realized.
Preferably, the restriction 18 is a capillary tube; or, a throttle valve is arranged on the throttle pipe 18, so that the pressure reducing effect of the throttle pipe 18 on oil is ensured.
Preferably, the end surface of the upper flange 9 facing the roller 3 is provided with a first back pressure oil groove 13 and a second back pressure oil groove 19 at intervals along the circumferential direction, the first back pressure oil groove 13 is arranged corresponding to the back pressure oil cavity 7 of the air suction section, the second back pressure oil groove 19 is arranged corresponding to the back pressure oil cavity 7 of the air discharge section, the first oil hole 16 is communicated to the first back pressure oil groove 13, and the second oil hole 17 is communicated to the second back pressure oil groove 19.
Preferably, the second back pressure oil groove 19 includes an oil storage section 20 and an oil holding section 21 sequentially arranged along the rotation direction of the roller 3, the radial width of the oil storage section 20 is greater than the radial width of the oil holding section 21, and the second oil hole 17 is communicated to the oil holding section 21. When the back pressure oil cavity 7 reaches the exhaust section, the volume of the back pressure oil cavity 7 is gradually reduced, the oil pressure in the back pressure oil cavity 7 is increased, the oil enters the second back pressure oil groove 19 for storage under the action of pressure difference, when the oil in the back pressure oil cavity 7 is discharged more, the oil pressure is further increased, part of the oil enters the second oil hole 17 through the oil holding section 21 at the rotating tail end of the second back pressure oil groove 19, the radial width of the oil holding section is far smaller than the radial width of the oil storage section 20, so that the oil cannot be discharged from the oil holding section 21 in time, the oil pressure in the second back pressure oil groove 19 can be kept at higher pressure, the sliding vane 5 is prevented from being separated from the cylinder 2, meanwhile, part of the oil enters the second oil hole 17 from the oil holding section 21 under the action of pressure, then enters the first back pressure oil groove 13 through the throttle pipe 18 and the first oil hole 16 in sequence, when the back pressure oil cavity 7 rotates to the air suction section, the volume of the back pressure oil cavity 7 is gradually reduced, the pressure oil in the first back pressure oil groove 13 is smaller, the pressure oil in the back pressure oil cavity 7 is fully filled with the back pressure oil cavity 7, and the stability of the back pressure oil cavity is guaranteed, and the stability of the back pressure oil in the back pressure oil cavity 7 is improved.
Referring to fig. 12 in combination, the pump body assembly preferably further includes a lower flange 22, the main shaft 1 is further provided with a second side oil hole 23 communicating with the main oil passage 4, the second side oil hole 23 is communicated to an outer side wall of the main shaft 1, and the second side oil hole 23 is communicated with the back pressure oil chamber 7 located in the suction section through a throttle oil passage. The pump body assembly can also be used for reducing and supplementing the oil in the back pressure oil cavity 7 of the air suction section through the lower flange 22, and a throttling and pressure reducing structure on the lower flange 22 can be realized by adopting the same structure as that of the first embodiment and the second embodiment.
A third back pressure oil groove 24 and a fourth back pressure oil groove 25 can be arranged on the upper end surface of the lower flange 22, wherein the third back pressure oil groove 24 is arranged corresponding to the back pressure oil cavity 7 of the air suction section, and the fourth back pressure oil groove 25 is arranged corresponding to the back pressure oil cavity 7 of the air discharge section. A straight oil groove 26 is further formed in the center hole of the lower flange, and oil enters the straight oil groove 26 from the second side oil hole 23 to lubricate the lower flange bearing.
According to an embodiment of the present invention, a vane compressor includes a pump body assembly, which is the pump body assembly described above.
It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (13)
1. The pump body assembly of the rotary vane compressor is characterized by comprising a main shaft (1), a cylinder (2) and a roller (3), wherein a main oil way (4) axially penetrating through the main shaft (1) is arranged on the main shaft (1), the roller (3) is rotatably arranged in the cylinder (2), an inner cavity of the cylinder (2) is divided into an air suction section and an air discharge section, a plurality of sliding vane grooves (6) are formed in the roller (3) along the circumferential direction, sliding vanes (5) are arranged in the sliding vane grooves (6) in a sliding manner, a back pressure oil cavity (7) is formed at the bottoms of the sliding vanes (5) and the sliding vane grooves (6), and a throttle oil way is connected to the back pressure oil cavity (7) positioned in the air suction section;
the pump body assembly further comprises an upper flange (9) sleeved outside the main shaft (1), the main shaft (1) is further provided with a first side oil hole (8) for conveying oil in the main oil way (4) to the outer periphery side of the main shaft (1), the first side oil hole (8) is communicated with the back pressure oil cavity (7) of the exhaust section, the upper flange (9) is provided with a throttling oil way, and the back pressure oil cavity (7) of the exhaust section is communicated with the back pressure oil cavity (7) of the air suction section through the throttling oil way;
the main shaft (1) is further provided with a first side oil hole (8) for conveying oil in the main oil way (4) to the outer periphery side of the main shaft (1), and the first side oil hole (8) is communicated with the back pressure oil cavity (7) located in the air suction section through the throttling oil way.
2. Pump body assembly according to claim 1, characterized in that it further comprises an upper flange (9) sleeved outside the main shaft (1), an oil passage gap (10) being formed between the upper flange (9) and the main shaft (1), the oil passage gap (10) forming the throttle oil passage.
3. Pump body assembly according to claim 1, characterized in that it further comprises an upper flange (9) sleeved outside the main shaft (1), wherein a comb tooth structure (11) is formed on the inner wall surface of the upper flange (9), and the comb tooth structure (11) forms the throttle oil path.
4. A pump body assembly according to claim 2 or 3, characterized in that an oil receiving groove (12) communicating with the first side oil hole (8) is provided on an inner wall of the upper flange (9), and the first side oil hole (8) communicates with the throttle oil passage through the Rong Youcao (12).
5. A pump body assembly according to claim 2 or 3, characterized in that the back pressure oil chamber (7) of the upper flange (9) on the end face corresponding to the suction section is provided with a first back pressure oil groove (13), and the back pressure oil chamber (7) communicates with the first back pressure oil groove (13) when rotated to the suction section.
6. Pump body assembly according to claim 5, characterized in that the first back pressure oil groove (13) comprises a first arc-shaped section (14) and a second arc-shaped section (15) which are arranged in sequence along the rotation direction of the roller (3), the first arc-shaped section (14) and the second arc-shaped section (15) are communicated, and the radial width of the first arc-shaped section (14) is smaller than the radial width of the second arc-shaped section (15).
7. Pump body assembly according to claim 1, characterized in that the upper flange (9) is provided with a first oil hole (16) and a second oil hole (17), the second oil hole (17) is communicated with the back pressure oil cavity (7) of the exhaust section, the first oil hole (16) is communicated with the back pressure oil cavity (7) of the suction section, a throttle pipe (18) is connected between the first oil hole (16) and the second oil hole (17), and the throttle pipe (18) forms the throttle oil path.
8. Pump body assembly according to claim 7, characterized in that the first oil hole (16) and the second oil hole (17) each penetrate through the upper flange (9) in the axial direction, and the throttle pipe (18) is connected to one end of the first oil hole (16) and the second oil hole (17) away from the cylinder (2).
9. Pump body assembly according to claim 7, characterized in that the throttle tube (18) is a capillary tube; or, a throttle valve is arranged on the throttle pipe (18).
10. Pump body assembly according to any one of claims 7 to 9, characterized in that a first back pressure oil groove (13) and a second back pressure oil groove (19) are circumferentially arranged at intervals on the end surface of the upper flange (9) facing the roller (3), the first back pressure oil groove (13) being arranged corresponding to the back pressure oil cavity (7) of the suction section, the second back pressure oil groove (19) being arranged corresponding to the back pressure oil cavity (7) of the discharge section, the first oil hole (16) being connected to the first back pressure oil groove (13), the second oil hole (17) being connected to the second back pressure oil groove (19).
11. Pump body assembly according to claim 10, characterized in that the second back pressure oil groove (19) comprises an oil storage section (20) and an oil holding section (21) which are sequentially arranged along the rotation direction of the roller (3), the cross-sectional area of the flow cross-section of the oil storage section (20) is larger than the cross-sectional area of the flow cross-section of the oil holding section (21), and the second oil hole (17) is communicated to the oil holding section (21).
12. Pump body assembly according to any one of claims 1 to 3, 6 to 9, 11, characterized in that it further comprises a lower flange (22), the main shaft (1) is further provided with a second side oil hole (23) communicating with the main oil circuit (4), the second side oil hole (23) communicating to the outer side wall of the main shaft (1), the second side oil hole (23) communicating with the back pressure oil chamber (7) located in the suction section through the throttle oil circuit.
13. A vane compressor comprising a pump assembly, wherein the pump assembly is as claimed in any one of claims 1 to 12.
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| CN201711036548.1A CN107882728B (en) | 2017-10-30 | 2017-10-30 | Rotary vane compressor and pump body assembly thereof |
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| CN201711036548.1A CN107882728B (en) | 2017-10-30 | 2017-10-30 | Rotary vane compressor and pump body assembly thereof |
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| CN107882728A CN107882728A (en) | 2018-04-06 |
| CN107882728B true CN107882728B (en) | 2024-03-29 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020036241A1 (en) * | 2018-08-16 | 2020-02-20 | 엘지전자 주식회사 | Rotary compressor |
| CN108843570B (en) * | 2018-08-17 | 2023-08-25 | 珠海格力电器股份有限公司 | Compressor and air conditioner with same |
| CN108869285B (en) | 2018-09-12 | 2024-01-30 | 珠海格力电器股份有限公司 | Pump body assembly and compressor with same |
| CN109026695B (en) * | 2018-09-25 | 2023-08-11 | 珠海格力电器股份有限公司 | Pump body assembly and rotary vane compressor |
| KR102305246B1 (en) * | 2019-01-11 | 2021-09-27 | 엘지전자 주식회사 | Vain rotary compressor |
| CN109737065B (en) | 2019-02-27 | 2024-04-16 | 珠海格力电器股份有限公司 | Pump body assembly, compressor and air conditioning equipment |
| CN111794964B (en) * | 2020-06-29 | 2021-07-30 | 珠海格力电器股份有限公司 | Pump body subassembly, compressor and air conditioner |
| CN111794963B (en) * | 2020-06-29 | 2021-07-20 | 珠海格力电器股份有限公司 | Pump body subassembly, compressor and air conditioner |
| CN111963434B (en) * | 2020-07-24 | 2021-04-27 | 珠海格力电器股份有限公司 | Pump body subassembly, compressor and air conditioner |
| CN113323875B (en) * | 2021-05-20 | 2022-08-02 | 重庆建设车用空调器有限责任公司 | Rotary gas compressor |
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| CN107882728A (en) | 2018-04-06 |
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