CN108302039B - Compressor and air conditioner with same - Google Patents
Compressor and air conditioner with same Download PDFInfo
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- CN108302039B CN108302039B CN201810123517.8A CN201810123517A CN108302039B CN 108302039 B CN108302039 B CN 108302039B CN 201810123517 A CN201810123517 A CN 201810123517A CN 108302039 B CN108302039 B CN 108302039B
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- tooth
- hole wall
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- hole
- point
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- 238000004891 communication Methods 0.000 claims description 21
- 238000013022 venting Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 16
- 230000010349 pulsation Effects 0.000 description 17
- 238000007906 compression Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012545 processing 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
- F04C18/12—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 other than internal-axis type
- F04C18/14—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 other than internal-axis type with toothed rotary pistons
- F04C18/20—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 other than internal-axis type with toothed rotary pistons with dissimilar tooth forms
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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
- F04C29/06—Silencing
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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
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention provides a compressor and an air conditioner with the same, wherein the compressor comprises: the compressor body is provided with an exhaust hole; a first tooth space is arranged between the first meshing tooth and the second meshing tooth of the first rotor; a second tooth space is arranged between the third meshing tooth and the fourth meshing tooth of the second rotor; when the first inter-tooth volume is in a first critical exhaust state, the projection of the second meshing tooth on the cross section of the exhaust hole perpendicular to the central line of the first rotor is a first projection surface; when the second inter-tooth volume is in a second critical exhaust state, the projection of the fourth meshing tooth on the cross section of the exhaust hole perpendicular to the center line of the second rotor is a second projection surface; wherein at least one of at least part of the first projection surface and at least part of the second projection surface is located outside the exhaust hole. The compressor solves the problem that the compressor in the prior art can generate larger noise in the exhaust process.
Description
Technical Field
The invention relates to the field of compressors, in particular to a compressor and an air conditioner with the same.
Background
With the rapid development of national economy, the improvement of the living standard of people, noise pollution has become a serious problem in urban life gradually. The compressor is an indispensable industrial product in the modern society, and the noise pollution caused by the compressor is also very serious. The vibration noise problem of the screw refrigerating compressor not only causes noise pollution and excites the vibration of other auxiliary equipment, which is unfavorable for the long-term safe use of the system, affects the service life of the machine, but also causes additional energy loss and is unfavorable for the thermal performance of the refrigerating system.
On the premise that the rotor processing technology and assembly errors of all parts are effectively controlled, mechanical noise of the screw compressor can be effectively controlled. Hydrodynamic noise induced by the pulsation of the exhaust gas flow is a major contributor to vibration noise of the screw compressor. The periodic variation of the pressure difference and the area of the discharge orifice of the gas in the inter-rotor chamber volume and the control volume of the discharge chamber during discharge of the screw compressor is a direct cause of the pulsation of the discharge gas flow of the screw compressor, whereas the periodic variation of the mass flow of the gas in the inter-rotor chamber volume into the control volume of the discharge chamber via the discharge orifice causes a variation of the thermodynamic state parameter of the gas in the discharge chamber, which in turn causes the pulsation of the discharge pressure.
The exhaust process of the screw compressor has the unique characteristic that the position and the shape of the exhaust orifice should ensure that the gas working medium realizes the preset internal compression in the inter-tooth volume so as to improve the running economy of the machine. For the desired internal volume ratio, there must be a corresponding vent. That is, each vent orifice may reach a certain internal volume ratio. Fig. 1 shows a conventional screw compressor discharge port having an axial discharge port line pattern of a ' -b ' -c ' -d ' -e ' -f ' -g ' -h ' -a '. The curve sections b ' -c ', e ' -f ' are respectively taken as back section molded lines in front of tooth space volumes of the female rotor and the male rotor, the curve sections a ' -h ' -g ' are respectively taken as high-pressure side meshing line shapes, the curve sections a ' -b ', g ' -f ' are respectively taken as tooth root circumferences of the female rotor molded lines and the male rotor molded lines, and the curve sections c ' -d ', d ' -e ' are respectively taken as tooth top circumferences of the female rotor molded lines and the male rotor molded lines.
Disclosure of Invention
The invention mainly aims to provide a compressor and an air conditioner with the same, so as to solve the problem that the compressor in the prior art can generate larger noise in the exhaust process.
In order to achieve the above object, according to one aspect of the present invention, there is provided a compressor comprising: the compressor body is provided with an exhaust hole; a first rotor having a first tooth and a second tooth with a first tooth space therebetween; the second rotor is meshed with the first rotor, the second rotor is provided with a third meshing tooth and a fourth meshing tooth, and a second tooth space is arranged between the third meshing tooth and the fourth meshing tooth; the first rotor is rotatably arranged so that the first inter-tooth volume has a first critical exhaust state in which the first inter-tooth volume is not communicated with the exhaust hole and is in communication with the exhaust hole, and when the first inter-tooth volume is in the first critical exhaust state, the second meshing teeth are positioned on one side close to the exhaust hole, and the projection of the second meshing teeth on a section of the exhaust hole perpendicular to the central line of the first rotor is a first projection surface; the second rotor is rotatably arranged so that the second inter-tooth volume has a second critical exhaust state in which the second inter-tooth volume is not communicated with the exhaust hole and is in communication with the exhaust hole, and when the second inter-tooth volume is in the second critical exhaust state, the fourth meshing teeth are positioned on one side close to the exhaust hole, and the projection of the fourth meshing teeth on the section of the exhaust hole perpendicular to the center line of the second rotor is a second projection surface; wherein at least one of at least part of the first projection surface and at least part of the second projection surface is located outside the exhaust hole.
Further, the exhaust hole includes: the first exhaust hole section is arranged corresponding to the first rotor and is a polygonal hole.
Further, along the direction of rotation of the first rotor, the second tooth and the first tooth pass through the vent hole in sequence, the second tooth has a first tooth profile bc, the first tooth profile bc is disposed on a side of the second tooth adjacent to the first tooth space volume, and the first vent hole section includes: the first hole wall is provided with a first linear point b1 and a second linear point c1, and a connecting line between the first linear point b1 and the second linear point c1 is a first linear point b1c1; wherein, the first linear point b1 is positioned on the circumference of the tooth root where the second meshing tooth is positioned, and the second linear point c1 is positioned on the circumference of the tooth top where the second meshing tooth is positioned; when the first interdental volume is in the first critical exhaust state, the first tooth-shaped point b of the first tooth-shaped line bc coincides with the first line-shaped point b1, and a first preset arc degree s is arranged between the second tooth-shaped point c of the first tooth-shaped line bc and the second line-shaped point c 1.
Further, s is more than 0 and less than or equal to 1/6 pi.
Further, when the first inter-tooth volume is located in the first critical exhaust state, from the first linear point b1 to the second linear point c1, each first arc segment intersecting the first linear point b1c1 with the center line of the first rotor as a center and each first arc number between each tooth type point intersecting the first tooth type line bc are gradually increased.
Further, the first arc degree is m, the number of the first arc segments is n, and m=k=s/(n-1) from the first linear point b1 to the second linear point c1, wherein k is a natural number, and 0 < s is less than or equal to 1/6 pi.
Further, the first hole wall is an arc-shaped surface with smooth transition.
Further, the first hole wall is formed by splicing a plurality of arc-shaped surfaces.
Further, the first vent segment further comprises: the second hole wall is connected with the first hole wall, the second hole wall is provided with a third linear point a and a first linear point b1, a connecting line between the third linear point a and the first linear point b1 is a second linear point ab1, and the third linear point a is positioned on the circumference of the tooth root where the second meshing teeth are positioned; the third hole wall is connected with the first hole wall, the first hole wall is arranged between the second hole wall and the third hole wall, the third hole wall is provided with a second linear point c1 and a fourth linear point d, a connecting line between the second linear point c1 and the fourth linear point d is a third linear point c1d, and the fourth linear point d is positioned on the circumference of the tooth top where the second meshing teeth are positioned; the fourth hole wall is arranged between the second hole wall and the third hole wall, the fourth hole wall is provided with a third linear point a and a fifth linear point h, a connecting line between the third linear point a and the fifth linear point h is a fourth linear ah, and the fifth linear point h is positioned on the circumference of the tooth top where the second meshing teeth are positioned; the first hole wall, the second hole wall, the third hole wall and the fourth hole wall enclose a first exhaust hole section.
Further, the exhaust hole further includes: the second vent hole section is arranged corresponding to the second rotor, and the second vent hole section is a polygonal hole.
Further, the first vent segment and the second vent segment are in communication.
Further, along the direction of rotation of the second rotor, the fourth tooth and the third tooth pass through the vent hole in sequence, the fourth tooth has a second tooth profile fe, the second tooth profile fe is disposed at one side of the fourth tooth near the second tooth space volume, and the second vent hole section includes: a fifth hole wall, the fifth hole wall having a sixth linear point f1 and a seventh linear point e1, a connecting line between the sixth linear point f1 and the seventh linear point e1 being a fifth linear point f1e1; the sixth linear point f1 is positioned on the circumference of the tooth root where the fourth meshing tooth is positioned, and the seventh linear point e1 is positioned on the circumference of the tooth top where the fourth meshing tooth is positioned; when the second inter-tooth volume is in the second critical exhaust state, the first tooth-shaped point f of the second tooth-shaped line fe coincides with the sixth line-shaped point f1, and a second preset arc degree t is arranged between the second tooth-shaped point e of the second tooth-shaped line fe and the seventh line-shaped point e 1.
Further, 0 < t.ltoreq.1/6pi.
Further, when the second inter-tooth volume is located in the second critical exhaust state, from the sixth linear point f1 to the seventh linear point e1, each second arc segment intersecting the fifth linear point f1e1 with the center line of the second rotor as the center line gradually increases in each second radian number between each linear point and each tooth-shaped point intersecting the second tooth-shaped line fe.
Further, the second arc degree is m1, the number of the second arc segments is n1, and m1=k×t/(n 1-1) from the sixth linear point f1 to the seventh linear point e1, wherein k is a natural number, and 0 < t is less than or equal to 1/6 pi.
Further, the fifth hole wall is an arc-shaped surface with smooth transition.
Further, the fifth hole wall is formed by splicing a plurality of arc-shaped surfaces.
Further, the second vent segment further comprises: the sixth hole wall is connected with the fifth hole wall, the sixth hole wall is provided with an eighth linear point g and a sixth linear point f1, a connecting line between the eighth linear point g and the sixth linear point f1 is a sixth linear gf1, and the eighth linear point g is positioned on the circumference of the tooth root where the fourth meshing tooth is positioned; a seventh hole wall connected with the fifth hole wall, wherein the fifth hole wall is arranged between the sixth hole wall and the seventh hole wall, the seventh hole wall is provided with a seventh linear point e1 and a fourth linear point d, the connecting line between the seventh linear point e1 and the fourth linear point d is a seventh linear point e1d, and the fourth linear point d is positioned on the circumference of the tooth top where the fourth meshing teeth are positioned; an eighth hole wall, which is arranged between the sixth hole wall and the seventh hole wall, the eighth hole wall is provided with an eighth line-shaped point g and a fifth line-shaped point h, the connecting line between the eighth line-shaped point g and the fifth line-shaped point h is an eighth line-shaped gh, and the fifth line-shaped point h is positioned on the circumference of the tooth top where the fourth meshing teeth are positioned; the fifth hole wall, the sixth hole wall, the seventh hole wall and the eighth hole wall enclose a second exhaust hole section.
According to another aspect of the present invention, there is provided an air conditioner including a compressor, which is the above-mentioned compressor.
The compressor of the invention can discharge the compressed gas in the compressor through the first rotor, the second rotor and the exhaust hole. The first rotor is provided with a first meshing tooth and a second meshing tooth, a first tooth space is arranged between the first meshing tooth and the second meshing tooth, the second rotor is meshed with the first rotor, the second rotor is provided with a third meshing tooth and a fourth meshing tooth, and a second tooth space is arranged between the third meshing tooth and the fourth meshing tooth. In order to realize the compression process of the gas, the first rotor and the second rotor are rotatably arranged, the first inter-tooth volume is provided with a first state which is not communicated with the exhaust hole, a second state which is communicated with the exhaust hole and a first critical exhaust state which is positioned between the first state and the second state, the first critical exhaust state is a state which is about to start exhausting, and correspondingly, the second inter-tooth volume is provided with a third state which is not communicated with the exhaust hole, a fourth state which is communicated with the exhaust hole and a second critical exhaust state which is positioned between the third state and the fourth state.
When the first inter-tooth volume is in the first critical venting state, the second engagement tooth is located on a side near the vent hole, and a projection of the second engagement tooth on a section of the vent hole perpendicular to a center line of the first rotor is a first projection surface. When the second inter-tooth volume is in the second critical venting state, the fourth tooth is located on a side near the vent hole, and a projection of the fourth tooth on a section of the vent hole perpendicular to a center line of the second rotor is a second projection surface. At least one of at least part of the first projection surface and at least part of the second projection surface is positioned at the outer side of the exhaust hole, so that the communication area between the first interdental volume and/or the second interdental volume and the exhaust hole is reduced at the beginning of exhaust, the air flow pulsation degree in the exhaust process is reduced, the pressure pulsation amplitude in the exhaust cavity is relieved, the hydrodynamic noise induced by the exhaust air flow pulsation is reduced, and the problem that the compressor in the prior art can generate larger noise in the exhaust process is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 shows a schematic view of the structure of a discharge orifice of a compressor of the prior art;
fig. 2 is a schematic view showing a structure of one engagement state of a first rotor and a second rotor of a compressor according to the present invention;
fig. 3 is a schematic view showing a structure of two engaged states of a first rotor and a second rotor of a compressor according to the present invention;
fig. 4 shows a graph of the area of communication between the vent holes and the interdental volume as a function of the first rotor angle.
Wherein the above figures include the following reference numerals:
20. an exhaust hole; 21. a first vent segment; 211. a first aperture wall; 212. a second aperture wall; 213. a third hole wall; 214. a fourth aperture wall; 22. a second vent segment; 221. a fifth hole wall; 222. a sixth aperture wall; 223. a seventh hole wall; 224. an eighth aperture wall; 30. a first rotor; 31. a first engagement tooth; 32. a second meshing tooth; 40. a second rotor; 41. a third meshing tooth; 42. and a fourth engagement tooth.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The present invention provides a compressor, please refer to fig. 2 and 3, the compressor includes: a compressor body provided with an exhaust hole 20; a first rotor 30, the first rotor 30 having a first meshing tooth 31 and a second meshing tooth 32 with a first tooth space between the first meshing tooth 31 and the second meshing tooth 32; a second rotor 40, the second rotor 40 being engaged with the first rotor 30, the second rotor 40 having a third engagement tooth 41 and a fourth engagement tooth 42, the third engagement tooth 41 and the fourth engagement tooth 42 having a second inter-tooth volume therebetween; the first rotor 30 is rotatably disposed such that the first inter-tooth volume has a first critical vent state in non-communication with the vent hole 20 and in communication with the vent hole 20, and the second engagement tooth 32 is located on a side near the vent hole 20 when the first inter-tooth volume is located in the first critical vent state, the projection of the second engagement tooth 32 on a section of the vent hole 20 perpendicular to a center line of the first rotor 30 being a first projection surface; the second rotor 40 is rotatably disposed such that the second inter-tooth volume has a second critical vent state in non-communication with the vent hole 20 and in communication with the vent hole 20, and when the second inter-tooth volume is in the second critical vent state, the fourth engaging tooth 42 is located on a side near the vent hole 20, a projection of the fourth engaging tooth 42 on a section of the vent hole 20 perpendicular to a center line of the second rotor 40 being a second projection surface; wherein at least one of at least a portion of the first projection surface and at least a portion of the second projection surface is located outside of the exhaust hole 20.
The compressor of the present invention can discharge compressed gas inside the compressor through the first rotor 30, the second rotor 40, and the discharge hole 20. Wherein the first rotor 30 has a first meshing tooth 31 and a second meshing tooth 32 with a first inter-tooth volume between the first meshing tooth 31 and the second meshing tooth 32, the second rotor 40 meshes with the first rotor 30, the second rotor 40 has a third meshing tooth 41 and a fourth meshing tooth 42 with a second inter-tooth volume between the third meshing tooth 41 and the fourth meshing tooth 42. In order to realize the compression process of the gas, the first rotor 30 and the second rotor 40 are rotatably provided, and the first inter-tooth volume has a first state in which it is not communicated with the gas discharge hole 20, a second state in which it is communicated with the gas discharge hole 20, and a first critical gas discharge state between the first state and the second state, the first critical gas discharge state being a state in which gas discharge is about to be started, and correspondingly, the second inter-tooth volume has a third state in which it is not communicated with the gas discharge hole 20, a fourth state in which it is communicated with the gas discharge hole 20, and a second critical gas discharge state between the third state and the fourth state.
When the first inter-tooth volume is located in the first critical venting state, the second tooth 32 is located on the side near the vent hole 20, and the projection of the second tooth 32 on the cross-section of the vent hole 20 perpendicular to the centerline of the first rotor 30 is the first projection surface. When the second inter-tooth volume is located in the second critical venting state, the fourth tooth 42 is located on the side near the vent hole 20, and the projection of the fourth tooth 42 on the cross-section of the vent hole 20 perpendicular to the centerline of the second rotor 40 is the second projection surface. By arranging at least one of at least part of the first projection surface and at least part of the second projection surface outside the exhaust hole 20, the communication area between the first interdental volume and/or the second interdental volume and the exhaust hole 20 is reduced at the beginning of exhaust, the air flow pulsation degree in the exhaust process is reduced, the pressure pulsation amplitude in the exhaust cavity is relieved, the hydrodynamic noise induced by the exhaust air flow pulsation is reduced, and the problem that the compressor in the prior art can generate larger noise in the exhaust process is solved.
In this embodiment, the first critical venting state is the final point where the first inter-dental volume is not in communication with the vent hole 20, or the starting point where the first inter-dental volume is in communication with the vent hole 20.
As shown in fig. 2, for a specific structure of the vent hole 20, the vent hole 20 includes: the first exhaust hole section 21, the first exhaust hole section 21 is provided corresponding to the first rotor 30, and the first exhaust hole section 21 is a polygonal hole.
With respect to the specific structure of the first exhaust hole section 21, as shown in fig. 2, in the rotation direction of the first rotor 30, the second teeth 32 and the first teeth 31 sequentially pass through the exhaust hole 20, the second teeth 32 have a first tooth profile bc, the first tooth profile bc is disposed at a side of the second teeth 32 near the first tooth space volume, and the first exhaust hole section 21 includes: the first hole wall 211, the first hole wall 211 has a first linear point b1 and a second linear point c1, and a connecting line between the first linear point b1 and the second linear point c1 is the first linear point b1c1; wherein the first linear point b1 is located on the circumference of the tooth root where the second meshing tooth 32 is located, and the second linear point c1 is located on the circumference of the tooth tip where the second meshing tooth 32 is located; when the first interdental volume is in the first critical exhaust state, the first tooth-shaped point b of the first tooth-shaped line bc coincides with the first line-shaped point b1, and a first preset arc degree s is arranged between the second tooth-shaped point c of the first tooth-shaped line bc and the second line-shaped point c 1.
In the present embodiment, after the start of the exhaust, the second meshing teeth 32 and the first meshing teeth 31 sequentially pass through one end face of the exhaust hole 20 in the rotation direction of the first rotor 30.
In the present embodiment, the second tooth 32 has a first tooth profile bc, the first tooth profile bc is disposed on a side of the second tooth 32 near the first tooth space volume, the first hole wall 211 has a first linear point b1 and a second linear point c1, and a connecting line between the first linear point b1 and the second linear point c1 is the first linear point b1c1; wherein the first linear point b1 is located on the circumference of the tooth root where the second tooth 32 is located, and the second linear point c1 is located on the circumference of the tooth tip where the second tooth 32 is located.
In this embodiment, when the first interdental volume is located in the first critical exhaust state, the first tooth-shaped point b of the first tooth-shaped line bc coincides with the first line-shaped point b1, and a first preset arc degree s is located between the second tooth-shaped point c of the first tooth-shaped line bc and the second line-shaped point c1, i.e. along the rotation direction of the first rotor 30, the second line-shaped point c1 is located in front of the second tooth-shaped point c.
Preferably, 0 < s.ltoreq.1/6 pi.
Preferably s=1/15 pi.
Preferably, when the first interdental volume is located in the first critical exhaust state, from the first linear point b1 to the second linear point c1, each first arc segment centered on the center line of the first rotor 30 gradually increases in each first radian between each linear point formed by intersecting the first linear b1c1 and each tooth-shaped point formed by intersecting the first tooth-shaped line bc.
In the present embodiment, the first wire form b1c1 is composed of a plurality of wire bodies, and accordingly, the first tooth form bc is composed of a plurality of wires, and the gap between the respective wire body segments gradually increases from the first wire form point b1 to the second wire form point c 1.
Preferably, the first arc degree is m, the number of the first arc segments is n, and m=k=s/(n-1) from the first linear point b1 to the second linear point c1, where k is a natural number, and 0 < s is less than or equal to 1/6 pi.
Preferably, m= (k 1/15 pi)/(n-1).
Preferably, the first hole wall 211 is a smoothly transitioned arcuate surface.
Preferably, the first hole wall 211 is formed by splicing a plurality of arc surfaces.
In this embodiment, the first hole wall 211 is a smooth arc surface or is formed by splicing a plurality of arc surfaces, and the area of the exhaust hole opening surrounded by the first hole wall at the initial stage of the exhaust process is small and the change is gentle.
Preferably, the first exhaust hole section 21 further comprises: the second hole wall 212, the second hole wall 212 is connected with the first hole wall 211, the second hole wall 212 has a third linear point a and a first linear point b1, the connecting line between the third linear point a and the first linear point b1 is a second linear point ab1, and the third linear point a is positioned on the circumference of the tooth root where the second meshing teeth 32 are positioned; the third hole wall 213, the third hole wall 213 is connected with the first hole wall 211, the first hole wall 211 is arranged between the second hole wall 212 and the third hole wall 213, the third hole wall 213 is provided with a second linear point c1 and a fourth linear point d, the connecting line between the second linear point c1 and the fourth linear point d is a third linear point c1d, and the fourth linear point d is positioned on the circumference of the tooth top where the second meshing teeth 32 are positioned; a fourth hole wall 214, the fourth hole wall 214 being disposed between the second hole wall 212 and the third hole wall 213, the fourth hole wall 214 having a third linear point a and a fifth linear point h, a connecting line between the third linear point a and the fifth linear point h being a fourth linear ah, the fifth linear point h being located on a tooth top circumference where the second meshing teeth 32 are located; wherein the first hole wall 211, the second hole wall 212, the third hole wall 213 and the fourth hole wall 214 enclose a first exhaust hole section 21.
Preferably, the exhaust hole 20 further includes: the second exhaust hole section 22, the second exhaust hole section 22 is disposed corresponding to the second rotor 40, and the second exhaust hole section 22 is a polygonal hole.
Preferably, the first vent section 21 and the second vent section 22 are in communication.
Optionally, the first vent section 21 and the second vent section 22 are not in communication.
Preferably, the fourth and third teeth 42 and 41 pass through the exhaust hole 20 in sequence in the rotation direction of the second rotor 40, the fourth teeth 42 having a second tooth profile fe disposed at a side of the fourth teeth 42 adjacent to the second inter-tooth volume, the second exhaust hole section 22 comprising: a fifth hole wall 221, the fifth hole wall 221 having a sixth linear point f1 and a seventh linear point e1, a connecting line between the sixth linear point f1 and the seventh linear point e1 being a fifth linear point f1e1; wherein the sixth linear point f1 is located on the circumference of the tooth root where the fourth meshing tooth 42 is located, and the seventh linear point e1 is located on the circumference of the tooth tip where the fourth meshing tooth 42 is located; when the second inter-tooth volume is in the second critical exhaust state, the first tooth-shaped point f of the second tooth-shaped line fe coincides with the sixth line-shaped point f1, and a second preset arc degree t is arranged between the second tooth-shaped point e of the second tooth-shaped line fe and the seventh line-shaped point e 1.
Preferably, 0 < t.ltoreq.1/6 pi.
Preferably, t=1/10 pi.
Preferably, t=1/12 pi.
Preferably, when the second inter-tooth volume is located in the second critical exhaust state, from the sixth linear point f1 to the seventh linear point e1, each first arc number between each linear point formed by intersecting the fifth linear point f1e1 with each first arc segment centered on the center line of the second rotor 40 and each tooth type point formed by intersecting the second tooth type line fe gradually increases.
Preferably, the first arc degree is m1, the number of the first arc segments is n1, and m1=k×t/(n 1-1) from the sixth linear point f1 to the seventh linear point e1, where k is a natural number, and 0 < t is less than or equal to 1/6 pi.
Preferably, m1= (k 1/10 pi)/(n 1-1).
Preferably, the fifth hole wall 221 is a smoothly transitioned arcuate surface.
Preferably, the fifth hole wall 221 is formed by splicing a plurality of arc surfaces.
Preferably, the second exhaust hole section 22 further comprises: a sixth hole wall 222, the sixth hole wall 222 being connected with the fifth hole wall 221, the sixth hole wall 222 having an eighth line-shaped point g and a sixth line-shaped point f1, a connecting line between the eighth line-shaped point g and the sixth line-shaped point f1 being a sixth line-shaped gf1, the eighth line-shaped point g being located on a circumference of a tooth root where the fourth meshing tooth 42 is located; a seventh hole wall 223, the seventh hole wall 223 is connected with the fifth hole wall 221, the fifth hole wall 221 is arranged between the sixth hole wall 222 and the seventh hole wall 223, the seventh hole wall 223 is provided with a seventh linear point e1 and a fourth linear point d, the connecting line between the seventh linear point e1 and the fourth linear point d is a seventh linear point e1d, and the fourth linear point d is positioned on the circumference of the tooth top where the fourth meshing tooth 42 is positioned; an eighth hole wall 224, the eighth hole wall 224 is disposed between the sixth hole wall 222 and the seventh hole wall 223, the eighth hole wall 224 has an eighth line-shaped point g and a fifth line-shaped point h, a connecting line between the eighth line-shaped point g and the fifth line-shaped point h is an eighth line-shaped gh, and the fifth line-shaped point h is located on the circumference of the tooth top where the fourth meshing teeth 42 are located; wherein the fifth hole wall 221, the sixth hole wall 222, the seventh hole wall 223, and the eighth hole wall 224 enclose the second exhaust hole section 22.
In the present embodiment, the first rotor 30 is a male rotor, and the second rotor 40 is a female rotor.
The compressor is a screw compressor, and the quality and the energy exchange degree between the interdental volume and the volume of the exhaust cavity in the exhaust process are effectively reduced by changing the shape of the exhaust hole (exhaust hole 20), so that the air flow pulsation degree flowing through the exhaust hole is relieved, the pressure pulsation amplitude of air in the exhaust cavity is reduced, and the hydrodynamic noise of the screw compressor is remarkably reduced.
In the initial stage of the exhaust process, the front-rear pressure difference of the exhaust orifice is the largest, and the pulsation degree of the gas flow flowing through the exhaust orifice can be reduced by effectively reducing the area of the exhaust orifice, so that the exhaust pressure pulsation is reduced.
When the female and male rotors are in the position shown in fig. 3, the space between the teeth on the male rotor side and the teeth on the female rotor side are in a state where the exhaust is about to begin, and the exhaust port is usually the largest pressure difference between the front and rear.
In fig. 4, a represents a communication area between the inter-tooth volume and the exhaust port, B represents a rotation angle of the male rotor, C represents a conventional compressor, and D represents a compressor of the present invention.
The change of the communication area between the vent hole and the interdental volume along with the rotation angle in the process of venting is calculated, and the calculation result is shown in fig. 4. It can be seen from the figure that, in the early stage of the exhaust process, compared with the traditional exhaust port shape, the improved exhaust port area is smaller and the change is gentle, and the pressure difference between the front and the rear of the exhaust port is the largest at the moment, so that the flow pulsation degree of the gas flowing through the exhaust port can be effectively reduced by reasonably reducing the exhaust port area.
The invention also provides an air conditioner which comprises a compressor, wherein the compressor is the compressor.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
the compressor of the present invention can discharge compressed gas inside the compressor through the first rotor 30, the second rotor 40, and the discharge hole 20. Wherein the first rotor 30 has a first meshing tooth 31 and a second meshing tooth 32 with a first inter-tooth volume between the first meshing tooth 31 and the second meshing tooth 32, the second rotor 40 meshes with the first rotor 30, the second rotor 40 has a third meshing tooth 41 and a fourth meshing tooth 42 with a second inter-tooth volume between the third meshing tooth 41 and the fourth meshing tooth 42. In order to realize the compression process of the gas, the first rotor 30 and the second rotor 40 are rotatably provided, and the first inter-tooth volume has a first state in which it is not communicated with the gas discharge hole 20, a second state in which it is communicated with the gas discharge hole 20, and a first critical gas discharge state between the first state and the second state, the first critical gas discharge state being a state in which gas discharge is about to be started, and correspondingly, the second inter-tooth volume has a third state in which it is not communicated with the gas discharge hole 20, a fourth state in which it is communicated with the gas discharge hole 20, and a second critical gas discharge state between the third state and the fourth state.
When the first inter-tooth volume is located in the first critical venting state, the second tooth 32 is located on the side near the vent hole 20, and the projection of the second tooth 32 on the cross-section of the vent hole 20 perpendicular to the centerline of the first rotor 30 is the first projection surface. When the second inter-tooth volume is located in the second critical venting state, the fourth tooth 42 is located on the side near the vent hole 20, and the projection of the fourth tooth 42 on the cross-section of the vent hole 20 perpendicular to the centerline of the second rotor 40 is the second projection surface. By arranging at least one of at least part of the first projection surface and at least part of the second projection surface outside the exhaust hole 20, the communication area between the first interdental volume and/or the second interdental volume and the exhaust hole 20 is reduced at the beginning of exhaust, the air flow pulsation degree in the exhaust process is reduced, the pressure pulsation amplitude in the exhaust cavity is relieved, the hydrodynamic noise induced by the exhaust air flow pulsation is reduced, and the problem that the compressor in the prior art can generate larger noise in the exhaust process is solved.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of being practiced otherwise than as specifically illustrated and described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (19)
1. A compressor, comprising:
the compressor comprises a compressor body, wherein an exhaust hole (20) is formed in the compressor body;
a first rotor (30), the first rotor (30) having a first meshing tooth (31) and a second meshing tooth (32), the first meshing tooth (31) and the second meshing tooth (32) having a first inter-tooth volume therebetween;
a second rotor (40), the second rotor (40) being in engagement with the first rotor (30), the second rotor (40) having a third engagement tooth (41) and a fourth engagement tooth (42), the third engagement tooth (41) and the fourth engagement tooth (42) having a second inter-tooth volume therebetween;
the first rotor (30) is rotatably arranged such that the first inter-tooth volume has a first critical venting state in non-communication with the vent hole (20) and in between the vent hole (20), the second engagement tooth (32) being located on a side close to the vent hole (20) when the first inter-tooth volume is in the first critical venting state, the projection of the second engagement tooth (32) on a section of the vent hole (20) perpendicular to a center line of the first rotor (30) being a first projection surface; the second rotor (40) is rotatably arranged such that the second inter-tooth volume has a second critical venting state in-between non-communication with the vent hole (20) and in communication with the vent hole (20), the fourth engagement tooth (42) being located on a side close to the vent hole (20) when the second inter-tooth volume is located in the second critical venting state, the projection of the fourth engagement tooth (42) on a section of the vent hole (20) perpendicular to a centerline of the second rotor (40) being a second projection surface;
wherein at least one of at least part of the first projection surface and at least part of the second projection surface is located outside the exhaust hole (20).
2. The compressor according to claim 1, wherein the discharge hole (20) comprises:
the first exhaust hole section (21), the first exhaust hole section (21) is arranged corresponding to the first rotor (30), and the first exhaust hole section (21) is a polygonal hole.
3. The compressor of claim 2, wherein the second meshing tooth (32) and the first meshing tooth (31) pass through the exhaust hole (20) in sequence in a rotational direction of the first rotor (30), the second meshing tooth (32) having a first tooth profile bc disposed on a side of the second meshing tooth (32) adjacent to the first tooth space volume, the first exhaust hole section (21) including:
a first hole wall (211), wherein the first hole wall (211) is provided with a first linear point b1 and a second linear point c1, and a connecting line between the first linear point b1 and the second linear point c1 is a first linear point b1c1;
wherein the first linear point b1 is located on the circumference of the tooth root where the second meshing tooth (32) is located, and the second linear point c1 is located on the circumference of the tooth tip where the second meshing tooth (32) is located;
when the first interdental volume is in the first critical exhaust state, a first tooth-shaped point b of the first tooth-shaped line bc coincides with the first line-shaped point b1, and a first preset arc degree s is arranged between a second tooth-shaped point c of the first tooth-shaped line bc and the second line-shaped point c 1.
4. A compressor according to claim 3, wherein 0 < s.ltoreq.1/6 pi.
5. A compressor according to claim 3, wherein, when the first inter-tooth volume is located in the first critical discharge state, from the first linear point b1 to the second linear point c1, respective first radians between respective linear points formed by intersecting the first linear point b1c1 and respective tooth form points formed by intersecting the first tooth form bc with respective first arc segments each centered on a center line of the first rotor (30) gradually increase.
6. The compressor of claim 5, wherein the first arc degree is m, the number of first arc segments is n, and m = k x s/(n-1) from the first linear point b1 to the second linear point c1, where k is a natural number, and 0 < s is less than or equal to 1/6 pi.
7. A compressor according to claim 3, wherein the first bore wall (211) is a smoothly transitioned arcuate surface.
8. A compressor according to claim 3, wherein the first bore wall (211) is formed by a plurality of arcuate surfaces.
9. A compressor according to claim 3, wherein the first discharge hole section (21) further comprises:
the second hole wall (212), the second hole wall (212) is connected with the first hole wall (211), the second hole wall (212) is provided with a third linear point a and a first linear point b1, a connecting line between the third linear point a and the first linear point b1 is a second linear point ab1, and the third linear point a is positioned on the circumference of the tooth root where the second meshing tooth (32) is positioned;
the third hole wall (213), the third hole wall (213) is connected with the first hole wall (211), the first hole wall (211) is arranged between the second hole wall (212) and the third hole wall (213), the third hole wall (213) is provided with the second linear point c1 and a fourth linear point d, a connecting line between the second linear point c1 and the fourth linear point d is a third linear point c1d, and the fourth linear point d is positioned on the circumference of the tooth top where the second meshing tooth (32) is positioned;
a fourth hole wall (214), wherein the fourth hole wall (214) is arranged between the second hole wall (212) and the third hole wall (213), the fourth hole wall (214) is provided with a third linear point a and a fifth linear point h, a connecting line between the third linear point a and the fifth linear point h is a fourth linear ah, and the fifth linear point h is positioned on the circumference of the tooth top where the second meshing teeth (32) are positioned;
wherein the first hole wall (211), the second hole wall (212), the third hole wall (213) and the fourth hole wall (214) enclose the first exhaust hole section (21).
10. The compressor of claim 2, wherein the discharge hole (20) further comprises:
and a second exhaust hole section (22), wherein the second exhaust hole section (22) is arranged corresponding to the second rotor (40), and the second exhaust hole section (22) is a polygonal hole.
11. The compressor of claim 10, wherein the first and second discharge hole sections (21, 22) are in communication.
12. The compressor of claim 10, wherein the fourth and third teeth (42, 41) pass through the discharge hole (20) in sequence in a rotation direction of the second rotor (40), the fourth teeth (42) having a second tooth profile fe disposed on a side of the fourth teeth (42) adjacent to the second tooth space volume, the second discharge hole section (22) comprising:
a fifth hole wall (221), wherein the fifth hole wall (221) has a sixth linear point f1 and a seventh linear point e1, and a connecting line between the sixth linear point f1 and the seventh linear point e1 is a fifth linear point f1e1;
wherein the sixth linear point f1 is located on the circumference of the tooth root where the fourth meshing tooth (42) is located, and the seventh linear point e1 is located on the circumference of the tooth tip where the fourth meshing tooth (42) is located;
when the second interdental volume is in the second critical exhaust state, the first tooth-shaped point f of the second tooth-shaped line fe coincides with the sixth line-shaped point f1, and a second preset arc degree t is arranged between the second tooth-shaped point e of the second tooth-shaped line fe and the seventh line-shaped point e 1.
13. The compressor of claim 12, wherein 0 < t is less than or equal to 1/6 pi.
14. The compressor of claim 12, wherein, when the second inter-tooth volume is located in the second critical discharge state, respective second radians between respective line points formed by intersecting the fifth line form f1e1 and respective tooth form points formed by intersecting the second tooth form fe and respective second arc segments formed by intersecting the fifth line form f1e1 with respect to a center line of the second rotor (40) gradually increase from the sixth line form point f1 to the seventh line form point e 1.
15. The compressor of claim 14, wherein the second arc degree is m1, the number of second arc segments is n1, and m1=kχt/(n 1-1) from the sixth linear point f1 to the seventh linear point e1, wherein k is a natural number, 0 < t.ltoreq.1/6 pi.
16. The compressor of claim 12, wherein the fifth bore wall (221) is a smoothly transitioned arcuate surface.
17. The compressor of claim 12, wherein the fifth bore wall (221) is formed by a plurality of arcuate surfaces.
18. The compressor of claim 12, wherein the second discharge hole section (22) further comprises:
a sixth hole wall (222), the sixth hole wall (222) being connected to the fifth hole wall (221), the sixth hole wall (222) having an eighth linear point g and the sixth linear point f1, a connecting line between the eighth linear point g and the sixth linear point f1 being a sixth linear gf1, the eighth linear point g being located on a circumference of a tooth root where the fourth meshing tooth (42) is located;
a seventh hole wall (223), wherein the seventh hole wall (223) is connected with the fifth hole wall (221), the fifth hole wall (221) is arranged between the sixth hole wall (222) and the seventh hole wall (223), the seventh hole wall (223) is provided with a seventh linear point e1 and a fourth linear point d, a connecting line between the seventh linear point e1 and the fourth linear point d is a seventh linear point e1d, and the fourth linear point d is positioned on the circumference of the tooth top where the fourth meshing tooth (42) is positioned;
an eighth hole wall (224), wherein the eighth hole wall (224) is arranged between the sixth hole wall (222) and the seventh hole wall (223), the eighth hole wall (224) is provided with an eighth linear point g and a fifth linear point h, a connecting line between the eighth linear point g and the fifth linear point h is an eighth linear gh, and the fifth linear point h is positioned on the circumference of the tooth top where the fourth meshing tooth (42) is positioned;
wherein the fifth hole wall (221), the sixth hole wall (222), the seventh hole wall (223) and the eighth hole wall (224) enclose the second exhaust hole section (22).
19. An air conditioner comprising a compressor, wherein the compressor is the compressor of any one of claims 1 to 18.
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| CN201810123517.8A CN108302039B (en) | 2018-02-07 | 2018-02-07 | Compressor and air conditioner with same |
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| CN201810123517.8A CN108302039B (en) | 2018-02-07 | 2018-02-07 | Compressor and air conditioner with same |
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| CN108302039B true CN108302039B (en) | 2024-02-27 |
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| CN1676935A (en) * | 2004-03-30 | 2005-10-05 | 李汗强 | Rotor tooth profile for helical-lobe compressor |
| CN201262152Y (en) * | 2008-08-18 | 2009-06-24 | 淄博干式真空泵有限公司 | Active opening/closing type axial exhaust screw vacuum pump |
| CN203335398U (en) * | 2013-06-26 | 2013-12-11 | 上海申行健压缩机有限公司 | High-efficiency screw compressor |
| CN205858689U (en) * | 2016-06-24 | 2017-01-04 | 珠海格力电器股份有限公司 | A kind of exhaust shaft bearing and helical-lobe compressor |
| CN208010591U (en) * | 2018-02-07 | 2018-10-26 | 珠海格力电器股份有限公司 | Compressor and air conditioner with it |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101012291B1 (en) * | 2008-10-06 | 2011-02-08 | 경원기계공업(주) | Rotor Profile For A Screw Compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1676935A (en) * | 2004-03-30 | 2005-10-05 | 李汗强 | Rotor tooth profile for helical-lobe compressor |
| CN201262152Y (en) * | 2008-08-18 | 2009-06-24 | 淄博干式真空泵有限公司 | Active opening/closing type axial exhaust screw vacuum pump |
| CN203335398U (en) * | 2013-06-26 | 2013-12-11 | 上海申行健压缩机有限公司 | High-efficiency screw compressor |
| CN205858689U (en) * | 2016-06-24 | 2017-01-04 | 珠海格力电器股份有限公司 | A kind of exhaust shaft bearing and helical-lobe compressor |
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