CN114623079B - Coaxial conical screw compressor and assembly method thereof - Google Patents
Coaxial conical screw compressor and assembly method thereof Download PDFInfo
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- CN114623079B CN114623079B CN202210311439.0A CN202210311439A CN114623079B CN 114623079 B CN114623079 B CN 114623079B CN 202210311439 A CN202210311439 A CN 202210311439A CN 114623079 B CN114623079 B CN 114623079B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000009434 installation Methods 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/10—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member
- F04C18/107—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member with helical teeth
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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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with or adaptation to specific driving engines or motors
-
- 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
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
-
- 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
-
- 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
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- 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
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
-
- 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
- F04C2240/00—Components
- F04C2240/10—Stators
-
- 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
- F04C2240/00—Components
- F04C2240/50—Bearings
-
- 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
- F04C2240/00—Components
- F04C2240/60—Shafts
- F04C2240/605—Shaft sleeves or details thereof
Abstract
A coaxial conical screw compressor and an assembly method thereof are provided, wherein the compressor comprises a driving motor arranged in a motor shell and a conical screw rotor arranged in a rotor shell, and the motor shell is connected with one side end surface of the rotor shell through a shell connecting piece; the two end surfaces of the shell connecting piece are mutually intersected, and the intersection angle of the surface normal is equal to the intersection angle of the inner rotor axis and the outer rotor axis of the conical screw rotor; the shell connecting piece is internally provided with a hub type bearing seat, a bearing mounting cylinder is arranged on the hub type bearing seat, and a connecting piece bearing for supporting the inner rotor shaft and the motor rotor shaft and a coupler for connecting the inner rotor shaft and the motor rotor shaft are arranged in the bearing mounting cylinder; an outer rotor bearing for supporting the two large ends and the two small ends of the outer rotor is arranged in the rotor shell; the end face of the other side of the motor shell is provided with an air suction end cover, the end face of the other side of the rotor shell is connected with an air exhaust end cover through an oil-gas separator, and the oil-gas separator is communicated with an air exhaust port of the conical screw rotor. The invention can improve the stability of the compressor structure.
Description
Technical Field
The invention belongs to the field of compressor structural design, and particularly relates to a coaxial conical screw compressor and an assembly method thereof.
Background
The twin screw compressor is a positive displacement rotary compressor for obtaining high pressure gas and has wide application in modern industry. The core of the twin screw compressor is a pair of meshed rotors, the structure of which directly determines the overall performance of the compressor, so the improvement of the rotor structure is always a key means for achieving the aims of energy saving and performance improvement. Among them, the inner gearing conical rotor structure is considered as a rotor structure improvement measure having great potential in improving the performance of the twin screw compressor. The rotor structure is a pair of inner and outer rotors with space internal engagement relationship, the rotation shafts of the inner and outer rotors are crossed and form an angle. Referring to fig. 1, it can be seen that the outer rotor axis 1 forms an angle with the inner rotor axis 2. The benefits of this construction are twofold: on one hand, compared with external engagement, the internal engagement can lead the structure to be more compact, and the assembly of a shell is not needed, thereby saving space and reducing parts; on the other hand, the conical rotor structure can realize the internal compression of gas, allow the axial suction and the exhaust, and can eliminate the need of designing an air inlet and an air outlet, thereby reducing the noise caused by the exhaust and simplifying the structural design of the compressor. In general, the conical screw compressor has advantages of miniaturization and low noise compared with the conventional twin screw compressor. However, this new internally geared conical rotor configuration also adds difficulty to the overall structural design of the compressor. When the internal engagement conical rotor structure is applied to the field of double-screw compressors, the structure of the traditional parallel shaft double-screw compressor is not applicable due to the problem that the rotating shafts of the internal rotor and the external rotor are not parallel. Therefore, in order to develop a novel efficient conical screw compressor, it is currently necessary to design a new compressor structure to provide technical support.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a coaxial conical screw compressor and an assembly method thereof, which ensure that the axes of the rotating shafts of the compressor are kept on the same straight line, improve the stability of the whole structure and reduce the processing difficulty.
In order to achieve the above purpose, the present invention has the following technical scheme:
the coaxial conical screw compressor comprises a driving motor arranged in a motor shell and a conical screw rotor arranged in a rotor shell, wherein the motor shell is connected with one side end surface of the rotor shell through a shell connecting piece; the two end surfaces of the shell connecting piece are mutually intersected, and the intersection angle of the surface normal is equal to the intersection angle of the inner rotor axis and the outer rotor axis of the conical screw rotor; the shell connecting piece is internally provided with a hub type bearing seat, a bearing mounting cylinder is arranged on the hub type bearing seat, and a connecting piece bearing for supporting the inner rotor shaft and the motor rotor shaft and a coupler for connecting the inner rotor shaft and the motor rotor shaft are arranged in the bearing mounting cylinder; an outer rotor bearing for supporting the two large ends and the two small ends of the outer rotor is arranged in the rotor shell; the end face of the other side of the motor shell is provided with an air suction end cover, the end face of the other side of the rotor shell is connected with an air exhaust end cover through an oil-gas separator, and the oil-gas separator is communicated with an air exhaust port of the conical screw rotor.
Preferably, the end face of one side of the motor shell connected with the rotor shell through the shell connecting piece is a circular face with equal radius, the axis of the shell connecting piece is perpendicular to the mounting face of the rotating part, the shell connecting piece is stretched and formed from the mounting face of the rotating part to the mounting face of the motor part, the cross section size is two intersecting circles formed by connecting tangent lines, the radius of each intersecting circle is the same as the radius of the circular face of the shell connecting piece, the length of the tangent line is equal to the distance d between two circular centers, and the calculation expression is as follows:
wherein, I 1 For the length of the axis of the outer rotor l 2 Is the inner rotor axis length.
Preferably, the two ends of the shell connecting piece are connected with the end surfaces of the motor shell and the rotor shell through threads.
Preferably, rubber gaskets are arranged between the two ends of the shell connecting piece and the end face of the motor shell and between the two ends of the shell connecting piece and the end face of the rotor shell.
Preferably, the hub bearing seat further comprises a circular rim and a plurality of spokes, the bearing mounting cylinder is arranged at the center of the rim, the spokes are connected between the inner side of the rim and the outer wall of the bearing mounting cylinder, and an air suction channel is formed by the spokes, the rim and the gaps between the bearing mounting cylinder.
Preferably, an internal thread is processed on one side end surface of the shell connecting piece connected with the motor shell, and a matched external thread is processed on the periphery of the rim.
Preferably, a bearing retainer ring is further arranged in the bearing mounting cylinder, the bearing retainer ring is arranged between the two connecting piece bearings, and the connecting piece bearings and the bearing retainer ring for supporting the inner rotor shaft and the motor rotor shaft are sleeved on the coupler; the inner rotor shaft is provided with a bearing mounting seat, the bottom of the bearing mounting cylinder is a supporting seat, and the inner wall of the bearing mounting cylinder is a supporting wall; the connecting piece bearing and the bearing retainer ring are axially fixed with the bearing mounting seat through the supporting seat and are radially fixed through the supporting wall.
Preferably, bearing grooves are formed in the outer walls of the large end and the small end of the outer rotor, and the outer rotor bearings are fixed through bearing seats formed in the inner wall of the rotor shell in a matched mode through the two bearing grooves.
Preferably, the air suction end cover is provided with an air inlet valve, and the air exhaust end cover is provided with an air exhaust valve.
The invention also provides an assembly method of the coaxial conical screw compressor, which comprises the following steps:
an outer rotor bearing for supporting the two large ends and the two small ends of the outer rotor is arranged in the rotor shell;
mounting a conical screw rotor on the fixed outer rotor bearing;
connecting one side end surface of the shell connecting piece with one side end surface of the rotor shell;
mounting a coupler on the inner rotor shaft and mounting a connector bearing supporting the inner rotor shaft;
installing a hub type bearing seat in the shell connecting piece, enabling a bearing installation cylinder on the hub type bearing seat to be sleeved on the connecting piece bearing, and fixing the connecting piece bearing;
installing a driving motor, installing a motor rotor shaft on the other side of the coupler through a bearing installation cylinder, and sleeving a motor installation shell on the driving motor to be connected with the end surface of the other side of the shell connecting piece;
the oil-gas separator and the exhaust end cover are sequentially arranged on the end face of the other side of the rotor shell, and the air suction end cover is arranged on the end face of the other side of the motor installation shell.
Compared with the prior art, the invention has at least the following beneficial effects:
the motor shell is connected with the end face of the rotor shell through the shell connecting piece, the two end faces of the shell connecting piece are mutually intersected, the size of the intersecting angle of the surface normal is equal to the intersecting angle of the axis of the inner rotor and the axis of the outer rotor of the conical screw rotor, the problem that the rotating shafts are not parallel caused by the conical rotors can be solved, and normal meshing transmission between the inner rotor and the outer rotor is ensured. The shell connecting piece is arranged between the rotating part and the motor part and is the middle position of the integral structure of the compressor, so that vibration caused by unparallel inner and outer rotors in the working process of the compressor can be balanced, the integral structure is more stable, and the working state is safer. On the other hand, install hub type bearing frame in the casing connecting piece, be equipped with the bearing installation section of thick bamboo on the hub type bearing frame, be provided with the connecting piece bearing of supporting inner rotor shaft and motor rotor shaft and be used for connecting the shaft coupling of inner rotor shaft and motor rotor shaft in the bearing installation section of thick bamboo, hub type bearing frame provides the bearing installation effect for semi-closed inner gearing toper twin-screw compressor, and this design has reduced the operation degree of difficulty of actual processing greatly, has higher bearing stability simultaneously. Meanwhile, the spoke design of the hub-shaped bearing seat can serve as an air suction channel of the semi-closed internal-meshing conical double-screw compressor, so that the design that sucked air passes through and cools a motor is guaranteed, and meanwhile, the air is less influenced by the inclined plane of the compressor, so that the loss of air inlet pressure is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a rotor profile of an intermeshing conical twin screw compressor.
FIG. 2 (a) is a schematic view of the circle center distance of the shell connection piece dimension calculation process of the coaxial cone screw compressor of the present invention;
FIG. 2 (b) is a graph showing the relationship between the inner and outer rotor axes during the calculation of the shell connection size of the coaxial cone screw compressor of the present invention;
FIG. 3 (a) is a schematic perspective view of a housing connection of the coaxial cone screw compressor of the present invention;
FIG. 3 (b) is a schematic cross-sectional view of a casing connection of the coaxial cone screw compressor of the present invention;
FIG. 3 (c) is a schematic view of the mounting cross-section of the housing connector of the present invention with the motor housing and the rotating housing;
FIG. 4 (a) is a schematic perspective view of a hub bearing block of the coaxial cone screw compressor of the present invention;
FIG. 4 (b) is a schematic cross-sectional view of a hub-shaped bearing block of the coaxial cone screw compressor of the present invention;
fig. 5 is a schematic cross-sectional view showing the overall assembly structure of the coaxial cone screw compressor of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 5, a coaxial conical screw compressor according to an embodiment of the present invention includes a driving motor 14 disposed in a motor housing 15 and a conical screw rotor 13 disposed in a rotor housing 12, wherein the motor housing 15 is connected to one side end surface of the rotor housing 12 through a housing connecting member 5. Referring to fig. 3 (a) and 3 (b), the two end surfaces of the housing connection member 5 intersect each other, and the surface normal intersection angle is equal in magnitude to the inner and outer rotor axis intersection angle of the conical screw rotor 13, that is, the angle α between the outer rotor axis 1 and the inner rotor axis 2. The two ends of the housing connecting piece 5 are connected with the end face of the motor housing 15 and the end face of the rotor housing 12 through threads. Rubber gaskets are provided between both ends of the housing connector 5 and the end surfaces of the motor housing 15 and the rotor housing 12. The motor housing 15 and the rotor housing 12 are connected by the housing connecting piece 5 with one side end surface being a circular surface with equal radius, the axis of the housing connecting piece 5 is perpendicular to the rotating member mounting surface 12a, the housing connecting piece 5 is drawn from the rotating member mounting surface 12a to the motor member mounting surface 15a, as shown in fig. 3 (c), the cross section size is two intersecting circles formed by connecting tangential lines, each intersecting circle is the same as the radius of the circular surface of the housing connecting piece 5, the tangential line length is equal to the two-circle center distance d, as shown in fig. 2 (a), the calculation expression is as follows:
wherein, I 1 For the length of the axis 1 of the outer rotor, l 2 Is the length of the inner rotor axis 2.
The housing connector 5 has a hub-type bearing housing 8 mounted therein, the hub-type bearing housing 8 being mounted on the bearing housing mount 6 shown in fig. 3 (a), the center of the housing connector 5 being the suction passage 7, the mounting face 5a shown in fig. 3 (b) being the mounting face of the motor housing 15, and the mounting face 5b being the mounting face of the rotor housing 12. As shown in fig. 4 (a) and 4 (b), the hub-type bearing housing 8 is provided with a bearing mounting cylinder 10, and the bearing mounting cylinder 10 is provided with a connector bearing 18 for supporting the inner rotor shaft 16 and the motor rotor shaft 17, and a coupling 20 for connecting the inner rotor shaft 16 and the motor rotor shaft 17. The hub-type bearing seat 8 further includes a circular rim 9a and a plurality of spokes 9b, the bearing mounting cylinder 10 is disposed at the center of the rim 9a, the plurality of spokes 9b are connected between the inner side of the rim 9a and the outer wall of the bearing mounting cylinder 10, and an air suction passage 11 is formed by the spokes 9b and the gaps between the rim 9a and the bearing mounting cylinder 10. The housing connecting member 5 is provided with an internal thread on one end surface of the motor housing 15, the internal thread is provided on the mounting surface 6a shown in fig. 3 (b), and the outer periphery of the rim 9a is provided with a mating external thread. The bearing mounting cylinder 10 is internally provided with a bearing retainer ring 19, the bearing retainer ring 19 is arranged between two connecting piece bearings 18, and the connecting piece bearings 18 and the bearing retainer ring 19 for supporting the inner rotor shaft 16 and the motor rotor shaft 17 are sleeved on a coupler 20; the inner rotor shaft 16 is provided with a bearing mounting seat 16a, the bottom of the bearing mounting cylinder 10 is a supporting seat 10b, and the inner wall of the bearing mounting cylinder 10 is a supporting wall 10a; the connector bearing 18 and the bearing retainer 19 are axially fixed to the bearing mount 16a by the support base 10b and radially fixed by the support wall 10 a. Inside the rotor housing 12 are provided a first outer rotor bearing 25 and a second outer rotor bearing 26 supporting both ends of the outer rotor size. The other end face of the motor housing 15 is provided with an air suction end cover 21, the other end face of the rotor housing 12 is connected with an air exhaust end cover 23 through an oil-gas separator 22, and the oil-gas separator 22 is communicated with an air exhaust port of the conical screw rotor 13. Bearing grooves are formed in the outer walls of the large end and the small end of the outer rotor, and the outer rotor bearings are fixed through bearing seats formed in the inner wall of the rotor shell 12 in a matched mode through the two bearing grooves. An intake valve 24a is provided in the intake end cover 21, and an exhaust valve 24c is provided in the exhaust end cover 23. The compressor suction enters from the suction valve 24a on the suction end cap 21, passes through and cools the drive motor 14, enters the housing connection 5, passes from the hub bearing housing 8, enters the volume chamber 24b between the inner rotor and the outer rotor of the conical screw rotor 13, and achieves gas compression.
According to the invention, the whole shell connecting piece 5 is in an inclined cylindrical shape, the two end faces are mutually intersected, the intersection angle of the surface normal is equal to the intersection angle of the inner rotor axis and the outer rotor axis of the conical screw, the coaxial arrangement of the inner rotor and the motor rotor is ensured by the design of the two intersected end faces, the intersecting shaft transmission of the inner rotor and the outer rotor is realized, meanwhile, the motor shell 15 and the rotor shell 12 can be in sealing connection, the motor shell and the rotating component shell of the compressor are separated, and the vibration effect of the compressor is weakened to a certain extent. The hub bearing seat 8 takes a hub mounting frame as a main body, a cylindrical bearing seat is arranged in the center of the hub for mounting a bearing, and the spindle and the coupler 20 penetrate through the center line of the spindle and the coupler to ensure the connection between a motor rotor and an inner rotor. The rim 9a is provided with a mounting threaded hole, the rim 9a is connected with the bearing mounting cylinder 10 through the spoke 9b, and the space between the spoke 9b and the spoke 9b is used for designing a gas path.
When the motor is in operation, the driving motor 14 runs, the motor rotor shaft 17 enables the coupler 20 and the inner rotor shaft 16 to rotate simultaneously, and the hub-shaped bearing seat 8 is arranged in the shell connecting piece 5, so that the connecting piece bearing 18 is fixed in the working process, the whole rotating shaft is ensured to be in a straight line, and the inside of the compressor can be enabled to rotate stably without being influenced by an intersecting inclined plane. The shell connecting piece 5 is arranged between the conical screw rotor 13 and the driving motor 14, and separates the rotor shell 12 from the motor shell 15, so that the vibration transmission medium of the compressor shell is increased, the vibration effect of the compressor can be reduced, and the compressor is more stable.
Another embodiment of the present invention provides an assembling method of the coaxial cone screw compressor, including:
a first outer rotor bearing 25 and a first outer rotor bearing 26 for supporting the two ends of the outer rotor are arranged in the rotor shell 12, and the first outer rotor bearing 25 and the first outer rotor bearing 26 are fixed through bearing seats which are machined on the outer walls of the two ends of the outer rotor and matched with the first bearing groove 13a and the second bearing groove 13b on the inner wall of the rotor shell 12;
a conical screw rotor 13 is arranged on the fixed outer rotor bearing;
connecting one side end surface of the housing connecting piece 5 with one side end surface of the rotor housing 12;
the coupler 20 is arranged on the inner rotor shaft 16, and the connecting piece bearing 18 and the bearing retainer ring 19 are sleeved on the coupler 20;
installing the hub type bearing seat 8 in the housing connection 5 such that the bearing installation cylinder 10 on the hub type bearing seat 8 is sleeved on the connection member bearing 18, tightening the hub type bearing seat 8, and fixing the connection member bearing 18 through the bearing installation cylinder 10;
installing a driving motor 14, installing a motor rotor shaft 17 on the other side of the coupler 20 through the bearing installation cylinder 10, and sleeving a motor installation shell 15 on the driving motor 14 to be connected with the end surface of the other side of the shell connecting piece 5;
the oil-gas separator 22 and the exhaust end cover 23 are sequentially arranged on the other side end surface of the rotor shell 12, and the air suction end cover 21 is arranged on the other side end surface of the motor installation shell 15, so that the assembly process of the coaxial cone screw compressor is completed.
The shell connecting piece 5 between the motor part and the rotating part can solve the problem of non-parallel rotating shafts caused by conical rotors, and ensures normal meshing transmission between the inner rotor and the outer rotor. Meanwhile, the design of the hub-shaped bearing seat 8 of the invention is more convenient to solve the problem that the bearing is difficult to install due to the existence of the inclined plane in the conical screw compressor, and can be used for an air suction channel, so that the arrangement of the compressor through an air suction valve at the rear end of the motor is reserved, and then the motor is cooled by air suction.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (8)
1. A coaxial cone screw compressor, characterized in that: comprises a driving motor (14) arranged in a motor shell (15) and a conical screw rotor (13) arranged in a rotor shell (12), wherein the motor shell (15) is connected with one side end surface of the rotor shell (12) through a shell connecting piece (5); the two end faces of the shell connecting piece (5) are mutually intersected, and the intersection angle of the surface normal is equal to the intersection angle of the inner rotor axis and the outer rotor axis of the conical screw rotor (13); a hub-type bearing seat (8) is arranged in the shell connecting piece (5), a bearing mounting cylinder (10) is arranged on the hub-type bearing seat (8), and a connecting piece bearing (18) for supporting an inner rotor shaft (16) and a motor rotor shaft (17) and a coupler (20) for connecting the inner rotor shaft (16) and the motor rotor shaft (17) are arranged in the bearing mounting cylinder (10); an outer rotor bearing for supporting the two large ends and the two small ends of the outer rotor is arranged in the rotor shell (12); an air suction end cover (21) is arranged on the other side end surface of the motor shell (15), the other side end surface of the rotor shell (12) is connected with an air exhaust end cover (23) through an oil-gas separator (22), and the oil-gas separator (22) is communicated with an air exhaust port of the conical screw rotor (13);
the two ends of the shell connecting piece (5) are connected with the end surfaces of the motor shell (15) and the rotor shell (12) through threads;
an air inlet valve (24 a) is arranged on the air suction end cover (21), and an air outlet valve (24 c) is arranged on the air outlet end cover (23).
2. The coaxial cone screw compressor of claim 1, wherein: the motor shell (15) and the rotor shell (12) are connected through a shell connecting piece (5), one side end face of the motor shell is a circular face with equal radius, the axis of the shell connecting piece (5) is perpendicular to a rotating part mounting face (12 a), the shell connecting piece (5) is stretched and formed from the rotating part mounting face (12 a) to a motor part mounting face (15 a), the cross section size is two intersecting circles formed by connecting tangential lines, the radius of each intersecting circle is the same as that of the circular face of the shell connecting piece (5), the tangential length is equal to the distance d between two circular centers, and the calculation expression is as follows:
wherein, I 1 For the length of the axis of the outer rotor l 2 Is the inner rotor axis length.
3. The coaxial cone screw compressor of claim 1 or 2, wherein: rubber sealing gaskets are arranged between the two ends of the shell connecting piece (5) and the end faces of the motor shell (15) and the rotor shell (12).
4. The coaxial cone screw compressor of claim 1, wherein: the hub-type bearing seat (8) further comprises a circular rim (9 a) and a plurality of spokes (9 b), the bearing mounting cylinder (10) is arranged at the center of the rim (9 a), the spokes (9 b) are connected between the inner side of the rim (9 a) and the outer wall of the bearing mounting cylinder (10), and an air suction channel (11) is formed through gaps among the spokes (9 b), the rim (9 a) and the bearing mounting cylinder (10).
5. The coaxial cone screw compressor of claim 4, wherein: an inner thread is processed on one side end surface of the shell connecting piece (5) connected with the motor shell (15), and a matched outer thread is processed on the periphery of the rim (9 a).
6. The coaxial cone screw compressor of claim 4, wherein: the bearing mounting cylinder (10) is internally provided with a bearing retainer ring (19), the bearing retainer ring (19) is arranged between two connecting piece bearings (18), and the connecting piece bearings (18) and the bearing retainer ring (19) for supporting the inner rotor shaft (16) and the motor rotor shaft (17) are sleeved on the coupler (20); the inner rotor shaft (16) is provided with a bearing mounting seat (16 a), the bottom of the bearing mounting cylinder (10) is a supporting seat (10 b), and the inner wall of the bearing mounting cylinder (10) is a supporting wall (10 a); the connecting piece bearing (18) and the bearing retainer ring (19) are axially fixed with the bearing mounting seat (16 a) through the supporting seat (10 b), and are radially fixed through the supporting wall (10 a).
7. The coaxial cone screw compressor of claim 1, wherein: bearing grooves are formed in the outer walls of the large end and the small end of the outer rotor, and the outer rotor bearings are fixed through bearing seats which are formed in the inner wall of the rotor shell (12) in a matched mode through the two bearing grooves.
8. A method of assembling a coaxial cone screw compressor according to claim 1, comprising:
an outer rotor bearing for supporting the two large ends and the two small ends of the outer rotor is arranged in the rotor shell (12);
a conical screw rotor (13) is arranged on the fixed outer rotor bearing;
connecting one side end surface of the shell connecting piece (5) with one side end surface of the rotor shell (12);
mounting a coupling (20) to the inner rotor shaft (16) and mounting a connector bearing (18) supporting the inner rotor shaft (16);
a hub-type bearing seat (8) is arranged in the shell connecting piece (5), so that a bearing mounting cylinder (10) on the hub-type bearing seat (8) is sleeved on the connecting piece bearing (18) and fixes the connecting piece bearing (18);
a driving motor (14) is installed, a motor rotor shaft (17) passes through a bearing installation cylinder (10) to be installed on the other side of a coupler (20), and a motor installation shell (15) is sleeved on the driving motor (14) and is connected with the end face of the other side of a shell connecting piece (5);
an oil-gas separator (22) and an exhaust end cover (23) are sequentially arranged on the other end face of the rotor shell (12), and an air suction end cover (21) is arranged on the other end face of the motor mounting shell (15).
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| CN202210311439.0A CN114623079B (en) | 2022-03-28 | 2022-03-28 | Coaxial conical screw compressor and assembly method thereof |
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| CN202210311439.0A CN114623079B (en) | 2022-03-28 | 2022-03-28 | Coaxial conical screw compressor and assembly method thereof |
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| CN114623079B true CN114623079B (en) | 2023-12-19 |
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| CN113513476A (en) * | 2021-07-12 | 2021-10-19 | 西安交通大学 | Variable-pitch space internal-meshing conical double-screw compressor rotor and compressor |
| CN113530826A (en) * | 2021-07-12 | 2021-10-22 | 西安交通大学 | Multi-tooth space cycloid type inner meshing conical double-screw compressor rotor and compressor |
| CN114109833A (en) * | 2021-12-30 | 2022-03-01 | 石家庄通安机械有限公司 | Screw compressor |
| CN217501981U (en) * | 2022-03-28 | 2022-09-27 | 西安交通大学 | Coaxial cone screw compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201013589Y (en) * | 2006-12-31 | 2008-01-30 | 西安交通大学 | Conical double helical lobe compressor actuating devive |
| JP2016138521A (en) * | 2015-01-28 | 2016-08-04 | ジョンソンコントロールズ ヒタチ エア コンディショニング テクノロジー（ホンコン）リミテッド | Screw compressor |
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| CN114623079A (en) | 2022-06-14 |
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