CN110067778B - Adjustable diffuser and refrigeration compressor thereof - Google Patents
Adjustable diffuser and refrigeration compressor thereof Download PDFInfo
- Publication number
- CN110067778B CN110067778B CN201910489078.7A CN201910489078A CN110067778B CN 110067778 B CN110067778 B CN 110067778B CN 201910489078 A CN201910489078 A CN 201910489078A CN 110067778 B CN110067778 B CN 110067778B
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- CN
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- Prior art keywords
- diffuser
- driving
- driven
- active
- adjustable
- Prior art date
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Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 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
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 abstract description 5
- 238000009792 diffusion process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/60—Control system actuates means
- F05D2270/62—Electrical actuators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an adjustable diffuser and a refrigeration compressor thereof, wherein the adjustable diffuser comprises: the adjustable diffuser further comprises a driving adjusting mechanism and a driven adjusting mechanism, and the refrigerating compressor comprises the adjustable diffuser structure. As the adjustable diffuser can synchronously and stably adjust the angles of the blades to meet the requirements of different working conditions, the working efficiency of the diffuser and the working stability of the diffuser are improved. As the refrigerating compressor manufactured by adopting the adjustable diffuser, not only the working efficiency and the working stability are improved, but also the leakage of the refrigerant can be effectively prevented.
Description
Technical Field
The invention belongs to the technical field of compressors, and particularly relates to an adjustable diffuser and a refrigeration compressor thereof.
Background
In centrifugal compressors and blowers, the gas velocity from the impeller is quite high, and the high-velocity gas flow has great kinetic energy, so that in order to fully utilize the kinetic energy and further raise the gas pressure, a diffuser is required to be arranged at the outlet of the impeller. In the prior art, the diffuser has a structure with a vaneless diffuser and a vane diffuser, the vane diffuser is divided into a fixed vane diffuser and an adjustable vane diffuser, the vaneless diffuser has wider adaptation working condition range, wider application and lower efficiency, in order to improve the diffusion efficiency, the adjustable vane diffuser is adopted in many occasions, the requirements of different working conditions are met by adjusting the angle of the vane, the existing adjustable diffuser often has the phenomenon of uneven adjustment of the angle of the vane of the diffuser, the stability of work is affected to a certain extent, and more importantly, the sealing performance of the existing diffuser is usually not ideal enough, and after the diffuser is applied to a refrigerating compressor, the phenomenon of refrigerant leakage can occur frequently.
Disclosure of Invention
In order to solve the problems, the invention provides an adjustable diffuser and a refrigeration compressor thereof, which can be used for synchronously and stably adjusting the angles of blades to meet the requirements of different working conditions, thereby improving the working efficiency of the diffuser and the working stability of the diffuser. As the refrigerating compressor manufactured by adopting the adjustable diffuser, not only the working efficiency and the working stability are improved, but also the leakage of the refrigerant can be effectively prevented.
In order to achieve the above object, the adjustable diffuser of the present invention adopts the following scheme, including:
an impeller connected to the rotating shaft, a connecting disc sleeved on the periphery of the impeller and connected to the inner peripheral surface of the volute, the adjustable diffuser further comprises a driving adjusting mechanism and a driven adjusting mechanism,
the driving adjusting mechanism comprises a mounting box which is connected to the outer peripheral surface of the volute in a sealing way, a through hole which is communicated with the inside of the mounting box is formed in the upper side of the mounting box, a connecting seat is tightly embedded into the through hole above the mounting box, the upper part of the connecting seat is connected with an electric actuator in a sealing way, the output end of the electric actuator is connected with a coupler, the coupler is connected with gears, two ends of each gear are respectively in clearance fit with a gear bushing, the gear bushing at the upper end is tightly matched with the through hole at the lower end of the connecting seat, the gear bushing at the lower end is tightly matched with a blind hole on the inner bottom surface of the mounting box, the gears are meshed with end face teeth at the right end of a swinging arm, the left end of the swinging arm extends out of a strip-shaped window on the volute and then is connected with a driving diffuser, the driving diffuser is rotatably connected to the bottom surface of a connecting disc, and the swinging arm drives the driving diffuser to alternately rotate clockwise and anticlockwise;
the driven adjusting mechanism comprises a driving ring connected with the driving diffuser, the driving ring rotates along with the rotation of the driving diffuser, a plurality of axial through holes are uniformly formed in the upper surface of the driving ring along the circumferential direction, the inner circumferential surface of the driving ring is in rolling connection with a plurality of guide wheels, the wheel shafts of the guide wheels are uniformly connected to the bottom surface of the connecting disc along the circumferential direction, the bottom surface of the connecting disc is also rotationally connected with a plurality of driven diffusers, the driven diffusers are distributed on the circular arc of the same circle center and are uniformly arranged along the circumferential direction, and the driven diffusers are connected with the driving ring and rotate along with the rotation of the driving ring.
The active diffuser comprises an active rotating shaft, the lower end of the active rotating shaft is provided with an active guide vane, the upper end of the active rotating shaft is connected with an active rocker arm, the end part of the active rocker arm is rotationally connected with one end of an active connecting rod, the other end of the active connecting rod is connected with an active pin shaft, and the upper end face of the active rotating shaft is connected with a square shaft.
The left end of the swing arm is connected with the active diffuser, the square hole at the left end of the swing arm is tightly matched with the square shaft on the upper end face of the active rotating shaft of the active diffuser, the active diffuser is rotatably connected to the bottom face of the connecting disc, the bushing is embedded in the through hole on the bottom face of the connecting disc, the active rotating shaft of the active diffuser is in clearance fit with the bushing, and the active diffuser is connected with the driving ring, so that the active pin shaft of the active diffuser is in clearance fit with the through hole on the driving ring.
The driven diffuser comprises a driven rotating shaft, the lower end of the driven rotating shaft is provided with a driven guide vane, the upper end of the driven rotating shaft is connected with a driven rocker arm, the end part of the driven rocker arm is rotationally connected with one end of a driven connecting rod, and the other end of the driven connecting rod is connected with a driven pin shaft.
The driven diffuser is connected with the driving ring, the driven pin shaft of the driven diffuser is in clearance fit with the through hole on the driving ring, the bottom surface of the connecting disc is rotationally connected with the driven diffuser, the bushing is embedded in the through hole on the bottom surface of the connecting disc, and the driven rotating shaft of the driven diffuser is in clearance fit with the bushing.
The guide wheel comprises a wheel shaft, a deep groove ball bearing sleeved on the wheel shaft, and a fastening nut in threaded connection with the upper end of the wheel shaft.
The driving guide vane and the driven guide vane are both wing profiles.
The driving rotating shaft of the driving diffuser is provided with a limiting block, and the limiting block limits the swing angle of the driving guide vane to be smaller than 20 degrees.
The outer peripheral surface of the volute is in sealing connection with the mounting box, a sealing gasket is additionally arranged between the mounting box and the outer peripheral surface of the volute, and the shaft coupling is sleeved with an O-shaped sealing ring.
The invention also relates to a refrigeration compressor comprising the adjustable diffuser structure.
As the adjustable diffuser can synchronously and stably adjust the angles of the blades to meet the requirements of different working conditions, the working efficiency of the diffuser and the working stability of the diffuser are improved. As the refrigerating compressor manufactured by adopting the adjustable diffuser, not only the working efficiency and the working stability are improved, but also the leakage of the refrigerant can be effectively prevented.
Drawings
FIG. 1 is a schematic cross-sectional partial structure of an adjustable diffuser of the present invention.
Fig. 2 is a schematic partial perspective view of an adjustable diffuser according to the present invention.
FIG. 3 is a schematic perspective view of an active diffuser of the adjustable diffuser of the present invention.
Fig. 4 is a schematic perspective view of an adjustable diffuser driven diffuser according to the present invention.
Fig. 5 is a schematic perspective view of an adjustable diffuser guide wheel according to the present invention.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings so as to facilitate a more clear understanding to those skilled in the art.
The adjustable diffuser comprises:
as shown in fig. 1 and 2, an impeller 1 connected to a rotating shaft, a connecting disc 3 sleeved on the periphery of the impeller and connected to the inner peripheral surface of a volute 2, the adjustable diffuser further comprises a driving adjusting mechanism and a driven adjusting mechanism,
the driving adjusting mechanism comprises a mounting box 4 which is hermetically connected to the peripheral surface of the volute, a through hole which is communicated with the inside of the mounting box is arranged above the mounting box, a connecting seat 5 is tightly embedded into the through hole above the mounting box, the upper part of the connecting seat is hermetically connected with an electric actuator 6, the output end of the electric actuator is connected with a coupler 7, the coupler is connected with a gear 8, the two ends of the gear are respectively in clearance fit with a gear bushing 9, the gear bushing at the upper end is tightly matched with the through hole at the lower end of the connecting seat, the gear bushing at the lower end is tightly matched with a blind hole on the inner bottom surface of the mounting box, the gear is meshed with end face teeth at the right end of a swing arm 10, the left end of the swing arm extends out of a strip-shaped window on the volute and then is connected with a driving diffuser, the driving diffuser is rotatably connected to the bottom surface of a connecting disc, and the swing arm drives the driving diffuser to alternately rotate clockwise and anticlockwise;
the driven adjusting mechanism comprises a driving ring 11 connected with the driving diffuser, the driving ring rotates along with the rotation of the driving diffuser, a plurality of axial through holes are uniformly formed in the upper surface of the driving ring along the circumferential direction, the inner circumferential surface of the driving ring is in rolling connection with a plurality of guide wheels 12, the wheel shafts of the guide wheels are uniformly connected to the bottom surface of the connecting disc along the circumferential direction, the bottom surface of the connecting disc is also rotationally connected with a plurality of driven diffusers, the driven diffusers are distributed on an arc with the same circle center and uniformly arranged along the circumferential direction, and the driven diffusers are connected with the driving ring and rotate along with the rotation of the driving ring.
Preferably, as shown in fig. 3, the active diffuser includes an active rotating shaft 13, the lower end of the active rotating shaft is provided with an active guide vane 14, the upper end of the active rotating shaft is connected with an active rocker 15, the end of the active rocker is rotatably connected with one end of an active connecting rod 16, the other end of the active connecting rod is connected with an active pin shaft 17, and the upper end face of the active rotating shaft is connected with a square shaft 18.
The left end of the swing arm is connected with the active diffuser, the square hole at the left end of the swing arm is tightly matched with the square shaft on the upper end face of the active rotating shaft of the active diffuser, the active diffuser is rotatably connected to the bottom face of the connecting disc, the bushing is embedded in the through hole on the bottom face of the connecting disc, the active rotating shaft of the active diffuser is in clearance fit with the bushing, and the active diffuser is connected with the driving ring, so that the active pin shaft of the active diffuser is in clearance fit with the through hole on the driving ring.
Preferably, as shown in fig. 4, the driven diffuser comprises a driven rotating shaft 13-1, a driven guide vane 14-1 is arranged at the lower end of the driven rotating shaft, the upper end of the driven rotating shaft is connected with a driven rocker arm 15-1, the end part of the driven rocker arm is rotatably connected with one end of a driven connecting rod 16-1, and the other end of the driven connecting rod is connected with a driven pin shaft 17-1.
The driven diffuser is connected with the driving ring, the driven pin shaft of the driven diffuser is in clearance fit with the through hole on the driving ring, the bottom surface of the connecting disc is rotationally connected with the driven diffuser, the bushing is embedded in the through hole on the bottom surface of the connecting disc, and the driven rotating shaft of the driven diffuser is in clearance fit with the bushing.
Preferably, as shown in fig. 5, the guide wheel comprises a wheel shaft, a deep groove ball bearing 12-1 sleeved on the wheel shaft, and a fastening nut 12-2 screwed on the upper end of the wheel shaft.
Preferably, as shown in fig. 3 and 4, the driving guide vane and the driven guide vane are both airfoils.
Further, a limiting block is arranged on the driving rotating shaft of the driving diffuser, and the limiting block limits the swing angle of the driving guide vane to be smaller than 20 degrees.
Furthermore, the outer peripheral surface of the volute is in sealing connection with the mounting box, a sealing gasket 19 is additionally arranged between the mounting box and the outer peripheral surface of the volute, and the shaft coupling is sleeved with an O-shaped sealing ring.
When the electric actuator is started, the gears rotate clockwise and anticlockwise alternately, the swing arm is driven to swing by taking the driving rotating shaft of the driving diffuser as the center of a circle, the driving diffuser rotates clockwise and anticlockwise alternately, the driving disc is driven to rotate clockwise and anticlockwise alternately, and therefore the driven guide vane of the driven diffuser and the driving guide vane of the driving diffuser are driven to swing synchronously, and the purpose of diffusion is achieved.
The invention also relates to a refrigeration compressor comprising the adjustable diffuser structure.
As the adjustable diffuser can synchronously and stably adjust the angles of the blades to meet the requirements of different working conditions, the working efficiency of the diffuser and the working stability of the diffuser are improved. As the refrigerating compressor manufactured by adopting the adjustable diffuser, not only the working efficiency and the working stability are improved, but also the leakage of the refrigerant can be effectively prevented.
Claims (7)
1. The utility model provides an adjustable diffuser, its includes connects in epaxial impeller (1), suit in the periphery of impeller and connect connection pad (3) on spiral case (2) inner peripheral face, its characterized in that:
the adjustable diffuser further comprises a driving adjusting mechanism and a driven adjusting mechanism,
the driving adjusting mechanism comprises a mounting box (4) which is hermetically connected to the peripheral surface of the volute, a through hole which is communicated with the inside of the mounting box is formed in the upper side of the mounting box, a connecting seat (5) is tightly embedded into the through hole above the mounting box, the upper part of the connecting seat is hermetically connected with an electric actuator (6), the output end of the electric actuator is connected with a coupler (7), the coupler is connected with a gear (8), two ends of the gear are respectively in clearance fit with a gear bushing (9), the gear bushing at the upper end is tightly matched with the through hole at the lower end of the connecting seat, the gear bushing at the lower end is tightly matched with a blind hole on the inner bottom surface of the mounting box, the gear is meshed with an end face tooth at the right end of a swing arm (10), the left end of the swing arm is connected with a driving diffuser after extending out of a strip-shaped window on the right end face of the swing arm, the swing arm is rotatably connected to the bottom surface of the connecting disc, the swing arm drives the driving diffuser to alternately rotate clockwise and anticlockwise, the driving diffuser comprises a driving rotating shaft (13), the lower end of the driving rotating shaft is provided with a driving guide vane (14), the upper end of the driving rotating shaft is connected with a driving rocker (15), one end of the driving rocker is connected with a driving pin (16), and the other end of the driving rocker is connected with a driving pin shaft (17);
the driven adjusting mechanism comprises a driving ring (11) connected with a driving diffuser, the driving ring rotates along with the rotation of the driving diffuser, a plurality of axial through holes are uniformly formed in the upper surface of the driving ring along the circumferential direction, a plurality of guide wheels (12) are connected to the inner circumferential surface of the driving ring in a rolling manner, the wheel shafts of the guide wheels are uniformly connected to the bottom surface of a connecting disc along the circumferential direction, a plurality of driven diffusers are also rotationally connected to the bottom surface of the connecting disc, the driven diffusers and the driving diffuser are distributed on an arc of the same circle center and uniformly arranged along the circumferential direction, the driven diffusers are connected with the driving ring and rotate along with the rotation of the driving ring, the driven diffusers comprise driven rotating shafts (13-1), driven guide vanes (14-1) are arranged at the lower ends of the driven rotating shafts, driven rocker arms (15-1) are connected to the upper ends of the driven rotating shafts, and the ends of the driven rocker arms are rotationally connected with one ends of driven connecting rods (16-1), and the other ends of the driven connecting rods are connected with driven pin shafts (17-1);
the left end of the swing arm is connected with the active diffuser, the square hole at the left end of the swing arm is tightly matched with the square shaft on the upper end face of the active rotating shaft of the active diffuser, the active diffuser is rotatably connected to the bottom face of the connecting disc, the bushing is embedded in the through hole on the bottom face of the connecting disc, the active rotating shaft of the active diffuser is in clearance fit with the bushing, and the active diffuser is connected with the driving ring, so that the active pin shaft of the active diffuser is in clearance fit with the through hole on the driving ring.
2. The adjustable diffuser of claim 1, wherein: the driven diffuser is connected with the driving ring, the driven pin shaft of the driven diffuser is in clearance fit with the through hole on the driving ring, the bottom surface of the connecting disc is rotationally connected with the driven diffuser, the bushing is embedded in the through hole on the bottom surface of the connecting disc, and the driven rotating shaft of the driven diffuser is in clearance fit with the bushing.
3. The adjustable diffuser of claim 2, wherein: the guide wheel comprises a wheel shaft, a deep groove ball bearing (12-1) sleeved on the wheel shaft, and a fastening nut (12-2) connected to the upper end of the wheel shaft in a threaded manner.
4. The adjustable diffuser of claim 3, wherein: the driving guide vane and the driven guide vane are both wing profiles.
5. The adjustable diffuser of claim 4, wherein: the driving rotating shaft of the driving diffuser is provided with a limiting block, and the limiting block limits the swing angle of the driving guide vane to be smaller than 20 degrees.
6. The adjustable diffuser of claim 5, wherein: the outer peripheral surface of the volute is in sealing connection with the mounting box, a sealing gasket (19) is additionally arranged between the mounting box and the outer peripheral surface of the volute, and the shaft coupling is sleeved with an O-shaped sealing ring.
7. A refrigeration compressor, characterized by: comprising an adjustable diffuser according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910489078.7A CN110067778B (en) | 2019-06-06 | 2019-06-06 | Adjustable diffuser and refrigeration compressor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910489078.7A CN110067778B (en) | 2019-06-06 | 2019-06-06 | Adjustable diffuser and refrigeration compressor thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110067778A CN110067778A (en) | 2019-07-30 |
| CN110067778B true CN110067778B (en) | 2023-12-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910489078.7A Active CN110067778B (en) | 2019-06-06 | 2019-06-06 | Adjustable diffuser and refrigeration compressor thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110067778B (en) |
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| CN201953718U (en) * | 2010-12-17 | 2011-08-31 | 乐金空调(山东)有限公司 | Vane adjustable diffuser of centrifugal compressor |
| CN202040124U (en) * | 2011-05-25 | 2011-11-16 | 北京虎渡能源科技有限公司 | Adjustable blade diffuser device for centrifugal air blower |
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| CN107387459A (en) * | 2017-08-30 | 2017-11-24 | 北京航空航天大学 | A kind of centrifugal blower inlet guide vane and diffuser vane simultaneously match governor motion |
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| CN210003565U (en) * | 2019-06-06 | 2020-01-31 | 北京虎渡能源科技有限公司 | adjustable diffuser and refrigeration compressor thereof |
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| JP6206638B2 (en) * | 2012-11-15 | 2017-10-04 | 三菱重工サーマルシステムズ株式会社 | Centrifugal compressor |
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2019
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110067778A (en) | 2019-07-30 |
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