CN111878403B - Compressor air supplementing mechanism, compressor and compressor air supplementing method - Google Patents
Compressor air supplementing mechanism, compressor and compressor air supplementing method Download PDFInfo
- Publication number
- CN111878403B CN111878403B CN202010856191.7A CN202010856191A CN111878403B CN 111878403 B CN111878403 B CN 111878403B CN 202010856191 A CN202010856191 A CN 202010856191A CN 111878403 B CN111878403 B CN 111878403B
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- 230000001502 supplementing effect Effects 0.000 title claims abstract description 168
- 230000007246 mechanism Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005192 partition Methods 0.000 claims description 27
- 230000006835 compression Effects 0.000 claims description 22
- 238000007906 compression Methods 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 abstract description 8
- 239000013589 supplement Substances 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
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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
- F04C18/16—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 helical teeth, e.g. chevron-shaped, screw type
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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
Abstract
The invention relates to a compressor air supplementing mechanism, a compressor and a compressor air supplementing method. Therefore, in the using process, a proper air supplementing port can be selected to be opened for supplementing air according to the actual using working condition, and the noise is reduced. The condition that noise is large because the position of the air supplementing port is not matched with the required air supplementing pressure when the compressor runs under variable working conditions is avoided.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a compressor air supplementing mechanism, a compressor and a compressor air supplementing method.
Background
In the technical field of compressors, in order to improve the refrigerating capacity and the refrigerating efficiency of the compressor, a gas-compensating port is generally provided. During the operation process of the compressor, when the rotor rotates to compress the refrigerant, the supplemented refrigerant can enter the rotor cavity from the air supplementing port, so that the refrigerating capacity is increased. And based on the fact that the air supplementing pressure and the air supplementing position of the air supplementing opening are directly related to the working condition of the compressor, if the air supplementing pressure or the air supplementing position of the air supplementing opening is not matched with the working condition of the compressor, larger noise exists. When the general compressor is used, the working condition can be adjusted according to actual needs, and the conditions of full-load operation and partial-load operation can exist. In the use process of a general compressor, if the compressor runs under variable working conditions, larger noise exists.
Disclosure of Invention
Aiming at the problem that the noise is large when a general compressor runs under variable working conditions, the invention provides a compressor air supplementing mechanism, a compressor and a compressor air supplementing method, which can adapt to various working conditions of the compressor and effectively reduce the noise when the compressor runs under variable working conditions.
The utility model provides a compressor air make-up mechanism, includes the organism, the organism is equipped with the rotor chamber that is used for installing screw rod rotor, the lateral wall in rotor chamber is equipped with the air make-up mouth, the air make-up mouth is two at least, each the air make-up mouth is followed screw rod rotor's axial interval sets up.
The above-mentioned scheme provides a compressor air supplementing mechanism, through set up two at least air supplementing mouths on the lateral wall of rotor chamber to can be according to the in-service use operating mode in the use, select suitable air supplementing mouth to open and mend the air, thereby the noise reduction. The condition that noise is large because the position of the air supplementing port is not matched with the required air supplementing pressure when the compressor runs under variable working conditions is avoided.
In one embodiment, the screw rotor comprises a male rotor and a female rotor which are matched with each other, the side wall of the rotor cavity comprises a first side wall contacted with the male rotor and a second side wall contacted with the female rotor, one part of the air supplementing port is positioned on the first side wall, and the other part of the air supplementing port is positioned on the second side wall.
In one embodiment, the first side wall and the second side wall are both provided with at least two air compensating ports, and each air compensating port on the same side wall is arranged at intervals along the axial direction of the corresponding rotor.
In one embodiment, the air-supplementing ports are arranged adjacent to the tooth spiral line on the side wall of the rotor cavity, and two adjacent air-supplementing ports are respectively positioned on two sides of the same tooth spiral line on the side wall of the rotor cavity.
In one embodiment, the air supply port comprises a plurality of air supply small holes, and the air supply small holes of the same air supply port are sequentially arranged at intervals along the spiral direction of the screw rotor.
In one embodiment, the machine body is provided with at least two air supplementing cavities, and the air supplementing cavities are communicated with the air supplementing openings in a one-to-one correspondence manner.
In one embodiment, the machine body comprises a compression inner cylinder and an outer cylinder body, the outer cylinder body is sleeved outside the compression inner cylinder, the compression inner cylinder is connected with the outer cylinder body, the compression inner cylinder encloses into the rotor cavity, the air supplementing ports are formed in the compression inner cylinder, the outer cylinder body is provided with at least two air supplementing inlets, and a cavity shell body for enclosing into the air supplementing cavities is arranged between the compression inner cylinder and the outer cylinder body and is communicated with the air supplementing cavities in a one-to-one correspondence manner.
In one embodiment, the chamber housing corresponding to the adjacent air supply port has a common portion, the common portion is a chamber partition board, the chamber partition board is a bending board, the bending board includes a first partition board arranged along the axial direction of the rotor chamber, and a second partition board arranged along the circumferential direction of the rotor chamber, the first partition board is connected with the second partition board, and the second partition board is located between the adjacent air supply ports.
In one embodiment, the air supplementing inlet is provided with an air supplementing inlet sealing plate for sealing the air supplementing inlet.
A compressor comprises a male rotor, a female rotor and the compressor air supplementing mechanism, wherein the male rotor and the female rotor are installed in a rotor cavity.
The above scheme provides a compressor, through adopting the compressor air supplementing mechanism in any embodiment, thereby selecting the proper air supplementing port according to the operation condition of the compressor to supplement air. The condition that noise is large because the position of the air supplementing port is not matched with the required air supplementing pressure when the compressor runs under variable working conditions is avoided.
In one embodiment, a slide valve installed in the compressor air make-up mechanism is further included, a part of a side surface of the slide valve faces the rotor chamber, the part of the side surface of the slide valve is in contact with the male rotor and the female rotor, and the slide valve is slidable in an axial direction of the male rotor, thereby forming a discharge outlet at a position near the suction side.
The compressor air supplementing method is characterized by comprising the following steps of:
acquiring initial pressure P Starting from the beginning and end pressure P Terminal (A) of the primitive volume and pressure P n of each air supplementing port position according to the current working condition of the compressor;
Calculating an intermediate pressure P t from the start pressure P Starting from the beginning and the end pressure P Terminal (A) , the intermediate pressure
And judging the magnitude relation between the pressure P n of each air supplementing port and the intermediate pressure P t, and selecting the air supplementing port corresponding to the pressure P n which is smaller than the intermediate pressure P t and has the smallest difference value with the intermediate pressure P t for supplementing air.
The above scheme provides a method for supplementing air to the compressor, which is used for calculating the intermediate pressure P t according to working conditions after the compressor runs stably, comparing the magnitude relation between the pressure P n at each air supplementing port position and the intermediate pressure P t, and selecting a proper air supplementing port to supplement air, so that the situation that the noise is large because the air supplementing port position is not matched with the required air supplementing pressure when the compressor runs under variable working conditions is avoided.
The utility model provides a compressor air supplementing method for carry out the air supplementing to above-mentioned compressor, the lateral wall of rotor chamber include with the first lateral wall of male rotor contact and with the second lateral wall of female rotor contact, first lateral wall with all be equipped with two on the second lateral wall at least the air supplementing mouth, each air supplementing mouth that is located on same lateral wall sets up along the axial interval of corresponding rotor, the compressor air supplementing method includes the following steps:
acquiring initial pressure P Starting from the beginning and end pressure P Terminal (A) of the primitive volume and pressure P n of each air supplementing port position according to the current working condition of the compressor;
Calculating an intermediate pressure P t from the start pressure P Starting from the beginning and the end pressure P Terminal (A) , the intermediate pressure
And judging the magnitude relation between the pressure P n of each air supplementing opening on the same side wall and the intermediate pressure P t, and selecting the air supplementing opening corresponding to the pressure P n which is smaller than the intermediate pressure P t and has the smallest difference value with the intermediate pressure P t for air supplementing.
The above scheme provides a method for supplementing air to the above compressor, which is used for calculating the intermediate pressure P t according to working conditions after the compressor is running stably, comparing the magnitude relation between the pressure P n and the intermediate pressure P t of each air supplementing port on the same side wall, and selecting proper air supplementing ports on the first side wall and the second side wall for supplementing air, thereby avoiding the occurrence of the condition that noise is large because the positions of the air supplementing ports are not matched with the required air supplementing pressure when the compressor is running under variable working conditions. And because the air supplementing ports are formed in the first side wall and the second side wall and participate in the air supplementing process, the air supplementing quantity of the single air supplementing port is reduced. Thereby reducing the flow rate of the air supplementing port and further reducing noise.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.
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 front view of a compressor according to the present embodiment;
FIG. 2 is an isometric view of the compressor of FIG. 1;
FIG. 3 is a cross-sectional view of the compressor of FIG. 1 after concealing the female and male rotors;
FIG. 4 is a cross-sectional view of the male rotor side of the compressor air make-up mechanism according to the present embodiment;
FIG. 5 is a cross-sectional view of the female rotor side of the compressor air make-up mechanism according to the present embodiment;
FIG. 6 is a cross-sectional view of the air supplementing chamber of the air supplementing mechanism of the compressor according to the present embodiment;
FIG. 7 is a schematic view of a structure of a sealing plate of a gas-filling inlet of the gas-filling mechanism of the compressor according to the present embodiment;
FIG. 8 is a cross-sectional view of the compressor at 75% load;
Fig. 9 is a sectional view of the compressor at 50% load.
Reference numerals illustrate:
10. A compressor; 11. a female rotor; 12. a male rotor; 13. a slide valve; 131. an exhaust outlet; 20. a compressor air supplementing mechanism; 21. a body; 211. a rotor cavity; 212. a first sidewall; 213. a second sidewall; 214. an air supplementing port; 2141. a small hole for supplementing air; 215. a suction spiral; 216. a first tooth helix; 217. a second tooth helix; 218. compressing the inner cylinder; 219. an outer cylinder; 22. a cavity housing; 221. a first separator; 222. a second separator; 23. rib plates; 24. a side plate; 25. an air supplementing sealing plate; 26. a supplementing cavity; 27. and (5) air supplementing inlet sealing plates.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In one embodiment, as shown in fig. 4 and 5, a compressor air make-up mechanism 20 is provided, comprising a housing 21, the housing 21 being provided with a rotor cavity 211 for mounting a screw rotor. As shown in fig. 1 and 2, the compressor air supplementing mechanism 20 is used in the compressor 10, the screw rotor includes a male rotor 12 and a female rotor 11 of the compressor 10, the male rotor 12 and the female rotor 11 are installed in the rotor chamber 211, and compression of gas is achieved by rotational engagement of the male rotor 12 and the female rotor 11.
Further, as shown in fig. 1 to 3, in one embodiment, the compressor 10 includes a slide valve 13, the slide valve 13 being installed in the compressor air make-up mechanism 20, a portion of a side surface of the slide valve 13 facing the rotor chamber 211, the portion of the side surface of the slide valve 13 being in contact with the male rotor 12 and the female rotor 11. The slide valve 13, the machine body 21, the male rotor 12 and the female rotor 11 together form a closed compression cavity, and the primitive volume between the male rotor 12 and the female rotor 11 changes in the process of rotating and meshing, so that the compression of gas is realized.
As shown in fig. 8 and 9, the spool 13 is slidable in the axial direction of the male rotor 12 or the female rotor 11, so that an exhaust outlet 131 is formed at a position near the suction side. So that the compressor 10 has different load conditions.
It is based on the fact that the compressor 10 has different conditions, and the optimal pressure and position of the air supply for the air supply are different under the different conditions. Thus, in one embodiment, as shown in fig. 3 to 5, a compressor air supply mechanism 20 is provided, and the side wall of the rotor cavity 211 included in the compressor air supply mechanism 20 is provided with at least two air supply ports 214, and each air supply port 214 is disposed at intervals along the axial direction of the screw rotor.
Therefore, in the using process, the proper air supplementing port 214 can be selected to be opened for supplementing air according to the actual using working condition, so that noise is reduced. Avoiding the occurrence of loud noise during variable operation of the compressor 10 because the position of the air supply port 214 is not matched with the required air supply pressure.
Specifically, when the working conditions of the compressor 10 are determined, the starting pressure P Starting from the beginning , the ending pressure P Terminal (A) , and the pressure P n at each of the positions of the air supply ports 214 of the primitive volume can be calculated. Calculating an intermediate pressure P t from the start pressure P Starting from the beginning and the end pressure P Terminal (A) , the intermediate pressureThe intermediate pressure P t is the optimal air supply pressure. The pressure P n varies at the positions of the respective air supply ports 214 spaced in the axial direction of the screw rotor. Therefore, the appropriate air supply ports 214 can be selected for air supply by comparing the magnitude relation of the pressure P n at the positions of the air supply ports 214 with the intermediate pressure P t.
When the compressor 10 operating conditions are determined, then the suction spiral 215 and the corresponding pressures at each of the tooth spirals are determined. Specifically, taking the male rotor 12 as a 5-tooth example, the positions of the suction spiral 215, the first tooth spiral 216, and the second tooth spiral 217 are shown in fig. 3. The first tooth helix 216 is a 72 ° rotation of the suction helix 215, and the second helix is a 144 ° rotation of the suction helix 215. Two air supplementing ports 214 are respectively arranged corresponding to the first tooth spiral line 216 and the second tooth spiral line 217. Adjacent two air supply ports 214 are respectively located at two sides of the same tooth spiral line on the side wall of the rotor cavity 211. For example, as shown in fig. 3, the number of the air-supplementing ports 214 is two, wherein one air-supplementing port 214 is located on one side of the first tooth spiral line 216 close to the second tooth spiral line 217, and the other air-supplementing port 214 is located on one side of the second tooth spiral line 217 away from the first tooth spiral line 216. In other words, the air supply port 214 is disposed adjacent to the tooth spiral on the side wall of the rotor chamber 211. Thus, after the working condition of the compressor 10 is determined, the pressures of the positions of the two air compensating ports 214 are close to the pressures of the corresponding tooth spiral lines, the relation between the pressures of the corresponding tooth spiral lines and the intermediate pressure P t under the working condition is compared, and the proper air compensating ports 214 are selected for air compensation.
Further, in one embodiment, as shown in fig. 4 and 5, the side walls of the rotor cavity 211 include a first side wall 212 in contact with the male rotor 12 and a second side wall 213 in contact with the female rotor 11. A portion of the air make-up port 214 is located on the first sidewall 212 and another portion of the air make-up port 214 is located on the second sidewall 213. In other words, the air supply port 214 for supplying air selected according to the above-described manner of selecting the air supply port 214 may be located on the male rotor 12 side or the female rotor 11 side.
Alternatively, the air supply ports 214 may be disposed on the first side wall 212 or the second side wall 213, so long as each air supply port 214 is disposed at intervals along the axial direction of the male rotor 12 or the female rotor 11, so as to satisfy different working condition requirements.
Further, in another embodiment, at least two air compensating ports 214 are disposed on each of the first sidewall 212 and the second sidewall 213, and each of the air compensating ports 214 disposed on the same sidewall is disposed at intervals along the axial direction of the corresponding rotor. In other words, during the air supply, the air supply ports 214 on the first sidewall 212 and the second sidewall 213 may be opened.
Specifically, the pressure P n at each of the air supply ports 214 on the same side wall is compared with the pressure P t in the middle, and the appropriate air supply port 214 is selected on each of the first side wall 212 and the second side wall 213 for air supply. Therefore, under the same working condition, the two sides of the male rotor and the female rotor are respectively provided with the air supplementing ports 214 for supplementing air, so that the air supplementing quantity of the single air supplementing port 214 is reduced, the flow speed is reduced, and the noise is further reduced. And based on the general tooth number difference of the male and female rotors, the air supplementing positions respectively selected on the first side wall 212 and the second side wall 213 are different, and when air supplementing, the air supplementing of the two air supplementing ports 214 is asynchronous, and a certain pulse difference exists, so that the air supplementing device is far away according to acoustic wave interference, and finally, the noise is further reduced.
Further, as shown in fig. 3 to 6, and fig. 8 and 9, in one embodiment, the air compensating port 214 includes a plurality of air compensating holes 2141, and the plurality of air compensating holes 2141 of the same air compensating port 214 are sequentially spaced along the spiral direction of the screw rotor. After the working conditions are determined, after the appropriate air supply port 214 is selected, each air supply hole 2141 included in the air supply port 214 participates in the air supply process. Specifically, the number of the air-compensating holes 2141 is determined according to the air-compensating flow rate required by the air-compensating port 214 for air-compensating and the aperture of each air-compensating hole 2141. In the case of determining the air supply flow rate, the smaller the aperture of the air supply small holes 2141 is, the larger the number of the air supply small holes 2141 is.
Further, as shown in fig. 3 to 6, in one embodiment, the body 21 is provided with at least two air supplementing cavities 26, and the air supplementing cavities 26 are in one-to-one correspondence with the air supplementing openings 214. The gas required for the gas filling passes through the gas filling cavity 26 and then enters the rotor cavity 211 from the gas filling port 214.
More specifically, in one embodiment, as shown in FIGS. 1-5, the body 21 includes a compression inner barrel 218 and an outer barrel 219. The outer barrel 219 is sleeved outside the compression inner barrel 218, and the compression inner barrel 218 is connected with the outer barrel 219. The compression inner cylinder 218 encloses the rotor cavity 211, and the air compensating port 214 is disposed on the compression inner cylinder 218. As shown in fig. 7, the outer cylinder 219 is provided with at least two air supplementing inlets, and the air supplementing inlets are correspondingly communicated with the air supplementing cavities 26 one by one. A chamber housing 22 is provided between the compression inner cylinder 218 and the outer cylinder 219 for enclosing the air supplementing chamber 26.
When a proper air supplementing position is selected, an air supplementing inlet corresponding to an air supplementing port 214 at the position is opened, and air to be supplemented enters the air supplementing cavity 26 from the air supplementing inlet and then enters the rotor cavity 211 from the air supplementing port 214. When the air compensating ports 214 are disposed on both sides of the male and female rotors, the corresponding cavity housing 22 is disposed on both sides of the male and female rotors, and similarly, the air compensating inlets are disposed on the outer barrel 219 at positions corresponding to the cavity housing 22. In other words, the arrangement of the chamber housing 22 and the air supply inlet corresponds to the position of the air supply port 214.
For example, in the compressor 10 shown in fig. 1, the chamber housing 22 corresponding to the air supply port 214 on the first side wall 212 of the male rotor 12 side is located at the lower right corner of the male rotor 12. The chamber housing 22 corresponding to the air supply port 214 on the second side wall 213 of the female rotor 11 side is located in the upper left corner of the female rotor 11. The azimuth relations in the lower right corner and the upper left corner described herein refer to the corresponding azimuth relations when the compressor 10 is placed at an angle as shown in fig. 1.
In one embodiment, as shown in fig. 4-6, the chamber housing 22 corresponding to adjacent air supply ports 214 has a common portion, which is a chamber partition. As shown in fig. 6, the cavity partition plate is a bending plate, and the bending plate includes a first partition plate 221 disposed along an axial direction of the rotor cavity 211, and a second partition plate 222 disposed along a circumferential direction of the rotor cavity 211, the first partition plate 221 is connected to the second partition plate 222, and the second partition plate 222 is located between adjacent air supply ports 214. Thereby dividing the adjacent air supply ports 214, and when the first partition 221 is arranged in the axial direction, one end is connected to the second partition 222, and the other end is connected to the other part of the chamber housing 22, so as to form a closed air supply chamber 26.
Specifically, as shown in fig. 3 and4, a rib 23 is provided between the compression inner tube 218 and the outer tube 219, and the rib 23 forms part of the structure of the chamber housing 22. The chamber housings 22 corresponding to the adjacent air supply ports 214 are combined to form an auxiliary housing. As shown in fig. 6, the auxiliary housing further includes an air-supplementing sealing plate 25 and two opposite side plates 24, both side plates 24 are connected to the rib plates 23, the side plates 24 are arranged along the axial direction of the rotor cavity 211, and the bending plate is located between the two side plates 24. The second partition plate 222 is connected between one of the side plates 24 and the first partition plate 221, an opening is formed between one end of the first partition plate 221, which is not connected with the second partition plate 222, and the two side plates 24 at intervals, and the air supplementing sealing plate 25 seals the opening to form the closed air supplementing cavity 26. It will be understood that the air-supplementing sealing plate 25 is disposed at a distance from the rib plate 23, the two side plates 24 are disposed at a distance from each other, the four plates enclose an enclosed space, and the bending plate is disposed in the enclosed space to divide the enclosed space into two air-supplementing chambers 26, one air-supplementing chamber 26 is correspondingly connected to one air-supplementing opening 214.
Further, as shown in fig. 2 and 7, in one embodiment, a make-up air inlet seal plate 27 is provided at the make-up air inlet for sealing the make-up air inlet. After selecting the appropriate air supply port 214 to perform the air supply port 214, the air supply inlet closed by the corresponding air supply sealing plate 25 is opened.
Further, in another embodiment, there is provided a method for supplementing air to the compressor 10, wherein the method for supplementing air to the compressor 10 includes the following steps:
Acquiring the initial pressure P Starting from the beginning and the end pressure P Terminal (A) of the primitive volume and the pressure P n of the positions of the air supplementing ports 214 according to the current working condition of the compressor 10;
Calculating an intermediate pressure P t from the start pressure P Starting from the beginning and the end pressure P Terminal (A) , the intermediate pressure
And judging the magnitude relation between the pressure P n of each air supplementing port 214 and the intermediate pressure P t, and selecting the air supplementing port 214 corresponding to the pressure P n which is the smallest difference value between the pressure P n and the intermediate pressure P t and smaller than the intermediate pressure P t for air supplementing.
The above scheme provides a method for supplementing air to the compressor 10, which is used for supplementing air to the compressor 10, when the operation of the compressor 10 is stable, calculating the intermediate pressure P t according to the working condition, comparing the magnitude relation between the pressure P n at the positions of each air supplementing port 214 and the intermediate pressure P t, and selecting the appropriate air supplementing port 214 to supplement air, so as to avoid the situation that the noise is large because the positions of the air supplementing ports 214 are not matched with the required air supplementing pressure when the compressor 10 is operated under the variable working condition.
Further, in still another embodiment, a method for supplementing air to the compressor 10 is provided, wherein the side wall of the rotor cavity 211 includes a first side wall 212 contacting the male rotor 12 and a second side wall 213 contacting the female rotor 11, at least two air supplementing ports 214 are disposed on the first side wall 212 and the second side wall 213, and each air supplementing port 214 on the same side wall is disposed at intervals along the axial direction of the corresponding rotor, and the method for supplementing air to the compressor 10 includes the following steps:
Acquiring the initial pressure P Starting from the beginning and the end pressure P Terminal (A) of the primitive volume and the pressure P n of the positions of the air supplementing ports 214 according to the current working condition of the compressor 10;
Calculating an intermediate pressure P t from the start pressure P Starting from the beginning and the end pressure P Terminal (A) , the intermediate pressure
And judging the magnitude relation between the pressure P n of each air supplementing opening 214 on the same side wall and the intermediate pressure P t, and selecting the air supplementing opening 214 which has the smallest difference value with the intermediate pressure P t and is smaller than the pressure P n corresponding to the intermediate pressure P t for air supplementing.
The above scheme provides a method for supplementing air to the compressor 10, which is used for calculating the intermediate pressure P t according to the working condition after the operation of the compressor 10 is stable, comparing the magnitude relation between the pressure P n and the intermediate pressure P t of each air supplementing port 214 on the same side wall, and selecting the proper air supplementing port 214 on the first side wall 212 and the second side wall 213 for supplementing air, so as to avoid the situation that the noise is large because the positions of the air supplementing ports 214 are not matched with the required air supplementing pressure when the compressor 10 is operated under the variable working condition. Moreover, the air supplementing port 214 is participated in the air supplementing process on the basis of the first side wall 212 and the second side wall 213, so that the air supplementing quantity of the single air supplementing port 214 is reduced. Thereby reducing the flow rate of the air supply port 214 and further reducing noise.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (11)
1. The air supplementing mechanism of the compressor is characterized by comprising a machine body, wherein the machine body is provided with a rotor cavity for installing a screw rotor, the side wall of the rotor cavity is provided with at least two air supplementing ports, and each air supplementing port is arranged at intervals along the axial direction of the screw rotor;
The screw rotor comprises a male rotor and a female rotor which are matched with each other, the side wall of the rotor cavity comprises a first side wall contacted with the male rotor and a second side wall contacted with the female rotor, at least two air supplementing ports are arranged on the first side wall and the second side wall, and all the air supplementing ports on the same side wall are arranged at intervals along the axial direction of the corresponding rotor;
And when the air is supplemented, the two air supplementing ports are asynchronous in air supplementing.
2. The compressor air make-up mechanism of claim 1, wherein the air make-up openings are disposed adjacent to a tooth spiral on a sidewall of the rotor chamber, and adjacent two air make-up openings are respectively located on both sides of the same tooth spiral on the sidewall of the rotor chamber.
3. The compressor air supply mechanism according to any one of claims 1 or 2, wherein the air supply port includes a plurality of air supply small holes, and a plurality of air supply small holes of the same air supply port are arranged at intervals in order along the spiral direction of the screw rotor.
4. The air supplementing mechanism of any one of claims 1 or 2, wherein at least two air supplementing cavities are arranged on the machine body, and the air supplementing cavities are communicated with the air supplementing openings in a one-to-one correspondence.
5. The air supplementing mechanism of claim 4, wherein the machine body comprises a compression inner cylinder and an outer cylinder body, the outer cylinder body is sleeved outside the compression inner cylinder, the compression inner cylinder is connected with the outer cylinder body, the compression inner cylinder encloses the rotor cavity, the air supplementing port is arranged on the compression inner cylinder, at least two air supplementing inlets are arranged on the outer cylinder body, a cavity shell body for enclosing the air supplementing cavity is arranged between the compression inner cylinder and the outer cylinder body, and the air supplementing inlets are communicated with the air supplementing cavity in a one-to-one correspondence manner.
6. The compressor air make-up mechanism according to claim 5, wherein the chamber housing corresponding to the adjacent air make-up openings has a common portion which is a chamber partition plate, the chamber partition plate is a bending plate including a first partition plate arranged along an axial direction of the rotor chamber and a second partition plate arranged along a circumferential direction of the rotor chamber, the first partition plate is connected with the second partition plate, and the second partition plate is located between the adjacent air make-up openings.
7. The compressor air make-up mechanism of claim 5, wherein an air make-up inlet seal plate is provided at the air make-up inlet for sealing the air make-up inlet.
8. A compressor comprising a male rotor, a female rotor and a compressor air make-up mechanism according to any one of claims 1 to 7, said male rotor and said female rotor being mounted in said rotor cavity.
9. The compressor of claim 8, further comprising a slide valve installed in the compressor air make-up mechanism, a portion of a side surface of the slide valve facing the rotor chamber, the portion of the side surface of the slide valve being in contact with the male rotor and the female rotor, the slide valve being slidable in an axial direction of the male rotor to form a discharge outlet at a position near a suction side.
10. A compressor air make-up method for making up air to the compressor of claim 8 or 9, comprising the steps of:
acquiring initial pressure P Starting from the beginning and end pressure P Terminal (A) of the primitive volume and pressure P n of each air supplementing port position according to the current working condition of the compressor;
Calculating an intermediate pressure P t from the start pressure P Starting from the beginning and the end pressure P Terminal (A) , the intermediate pressure And judging the magnitude relation between the pressure P n of each air supplementing port and the intermediate pressure P t, and selecting the air supplementing port corresponding to the pressure P n which is smaller than the intermediate pressure P t and has the smallest difference value with the intermediate pressure P t for supplementing air.
11. A method for supplementing air to a compressor according to claim 8 or 9, wherein the side wall of the rotor chamber includes a first side wall contacting the male rotor and a second side wall contacting the female rotor, at least two air supplementing openings are provided on the first side wall and the second side wall, and each air supplementing opening on the same side wall is disposed at intervals along the axial direction of the corresponding rotor, the method for supplementing air to a compressor comprises the following steps:
acquiring initial pressure P Starting from the beginning and end pressure P Terminal (A) of the primitive volume and pressure P n of each air supplementing port position according to the current working condition of the compressor;
Calculating an intermediate pressure P t from the start pressure P Starting from the beginning and the end pressure P Terminal (A) , the intermediate pressure And judging the magnitude relation between the pressure P n of each air supplementing opening on the same side wall and the intermediate pressure P t, and selecting the air supplementing opening corresponding to the pressure P n which is smaller than the intermediate pressure P t and has the smallest difference value with the intermediate pressure P t for air supplementing.
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| CN202010856191.7A CN111878403B (en) | 2020-08-24 | 2020-08-24 | Compressor air supplementing mechanism, compressor and compressor air supplementing method |
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| CN202010856191.7A CN111878403B (en) | 2020-08-24 | 2020-08-24 | Compressor air supplementing mechanism, compressor and compressor air supplementing method |
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| CN111878403B true CN111878403B (en) | 2024-04-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114320910B (en) * | 2020-12-02 | 2023-05-19 | 珠海格力电器股份有限公司 | Screw compressor and air conditioning system |
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| CN111878403A (en) | 2020-11-03 |
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