CN219262618U - Reciprocating compressor with adjustable air quantity - Google Patents
Reciprocating compressor with adjustable air quantity Download PDFInfo
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- CN219262618U CN219262618U CN202223561119.5U CN202223561119U CN219262618U CN 219262618 U CN219262618 U CN 219262618U CN 202223561119 U CN202223561119 U CN 202223561119U CN 219262618 U CN219262618 U CN 219262618U
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Abstract
The utility model discloses a reciprocating compressor with adjustable air quantity, which belongs to the field of compressors and comprises a crank case, wherein both sides of the crank case are sequentially provided with a middle body and an air cylinder, the air cylinder comprises a cylinder body, a compression cavity is arranged in the cylinder body, one end of the cylinder body is connected with an adjusting device, the adjusting device is communicated with the compression cavity and comprises a connecting piece, a through hole is arranged in the center of the connecting piece and can be communicated with the compression cavity, a movable connecting rod is arranged in the through hole, an adjusting piston is arranged at the end part of the connecting rod close to the cylinder body and is matched with the through hole, and a locking structure capable of locking the connecting rod is arranged between the end part of the connecting rod far away from the cylinder body and the connecting piece; the connecting piece is provided with a connecting channel which is communicated with a through hole far away from the adjusting piston, the cylinder body is also provided with an air inlet cavity, the side wall of the cylinder body at the position of the air inlet cavity is provided with a backflow channel, and the backflow channel can be communicated with the connecting channel and the air inlet cavity. The utility model can flexibly adjust the air quantity through the structure, and can reduce the loss of compressed air.
Description
Technical Field
The utility model relates to the field of compressors, in particular to a reciprocating compressor with adjustable air quantity.
Background
The reciprocating compressor is a compressor which periodically changes the volume of a cylinder body through the reciprocating motion of a piston or a diaphragm in the cylinder and realizes the pressurization and the transportation of gas, has the outstanding advantages of good reliability, large pressure range and the like, and is widely applied to the industries of chemical industry, petroleum, natural gas compressors and the like.
The principle of the reciprocating compressor is that a crankshaft drives a connecting rod, the connecting rod drives a piston, and the piston makes linear reciprocating motion. When the piston moves to one side, the cylinder volume is increased, the air inlet valve is opened, the air outlet valve is closed, and air is sucked in to complete the air inlet process; when the piston moves to the other side, the cylinder volume is reduced, the air outlet valve is opened, the air inlet valve is closed, and the compression process is completed.
When the working condition is changed, the air quantity of the reciprocating compressor needs to be adjusted, and in the prior art, the air quantity of the reciprocating compressor is adjusted in a mode of speed change adjustment, bypass adjustment and the like. Variable speed regulation may have adverse effects on compressor operation, such as valve flutter, high component wear, increased vibration, insufficient lubrication, etc. The bypass adjustment method is flexible, simple and easy to implement, and is matched with an automatic control system to adjust the high precision, but the economy is poor because all compression work of redundant gas is lost, so the method is suitable for occasions with occasional adjustment or small adjustment amplitude.
In view of the above problems of the prior art, the present utility model is directed to a reciprocating compressor with an adjustable air flow to overcome the above drawbacks.
Disclosure of Invention
The reciprocating compressor with adjustable air quantity provided by the utility model can flexibly adjust the air quantity and reduce the loss of compressed air.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the reciprocating compressor comprises a crankcase, wherein both sides of the crankcase are sequentially provided with a middle body and a cylinder, the cylinder comprises a cylinder body, a compression cavity is arranged in the cylinder body, one end of the cylinder body is connected with an adjusting device, and the adjusting device is communicated with the compression cavity;
the adjusting device comprises a connecting piece, wherein a flange plate is arranged on the connecting piece and is connected with the cylinder body, a through hole is formed in the center of the connecting piece and can be communicated with the compression cavity, a movable connecting rod is arranged in the through hole, an adjusting piston is arranged at the end part of the connecting rod close to the cylinder body and is matched with the through hole, and a locking structure capable of locking the connecting rod is arranged between the end part of the connecting rod far away from the cylinder body and the connecting piece;
the connecting piece is provided with a connecting channel, the connecting channel is communicated with a through hole far away from the adjusting piston, the cylinder body is further provided with an air inlet cavity, the side wall of the cylinder body at the position of the air inlet cavity is provided with a backflow channel, and the backflow channel can be communicated with the connecting channel and the air inlet cavity.
Preferably, a sealing ring is arranged between the flange plate and the cylinder body.
Preferably, the through hole comprises a receiving hole and a guide hole, the receiving hole is close to the cylinder body, and the adjusting piston moves in the receiving hole;
the connecting rod moves in a guiding way in the guiding hole.
Preferably, a sealing ring is arranged between the guide hole and the connecting rod.
Preferably, the locking structure comprises a locking handle, a section of threaded hole is formed at the end, far away from the guide hole of the cylinder body, of the locking structure, and a section of external thread section is arranged on the connecting piece and matched with the threaded hole;
the external thread section extends out of the through hole and is in threaded connection with the locking handle.
Preferably, a rotation adjusting structure is arranged on the connecting rod extending out of the through hole, and the rotation adjusting structure can drive the connecting rod to rotate.
Preferably, the rotation adjusting structure comprises an adjusting nut, and the adjusting nut is connected with a connecting rod extending out of the through hole through a key;
the outer end of the connecting rod extending out of the through hole is provided with an adjusting section, the diameter of the adjusting section is smaller than that of the external thread section, one end of the adjusting nut is abutted to the shaft shoulder of the adjusting section and the shaft shoulder of the external thread section, the other end of the adjusting nut is provided with a locking nut, and the locking nut is in threaded connection with the adjusting section.
Preferably, the side wall of the connecting piece corresponding to the position of the guide hole is provided with an air leakage recovery channel.
Preferably, the side wall of the connecting piece corresponding to the position of the threaded hole is provided with an oil filling port.
Preferably, the connecting channel is arranged on a flange of the connecting piece, the connecting channel comprises a radial channel and an axial channel communicated with the radial channel, and the axial channel is communicated with the backflow channel.
Preferably, a backflow sealing ring is arranged around the communication position of the axial channel and the backflow channel.
Preferably, one end of the connecting piece extends into the cylinder body for a distance.
The utility model has the advantages that:
1. according to the utility model, the space of the compression cavity is adjusted by means of the through hole on the connecting piece and the adjusting piston in the through hole, so that flexible adjustment of the air quantity is realized, and the leaked compressed air can be ensured to enter the air inlet cavity through the gap between the adjusting piston and the through hole, the gap between the connecting rod and the through hole, the connecting channel and the backflow channel in sequence through the connecting channel at the other end of the adjusting piston, so that the kinetic energy loss of the compressed air is reduced, the pressure at two sides of the adjusting piston can be balanced, and the stress at two sides of the adjusting piston is improved.
2. The utility model uses the screw thread connection of the rear end of the connecting rod and the connecting piece to adjust the position of the adjusting piston, can ensure the assembly of the adjusting piston and the containing hole, and the sealing ring is arranged between the guide hole and the connecting rod, thereby ensuring the tightness of the space at the rear end of the adjusting piston.
Drawings
FIG. 1 is a schematic diagram of a variable capacity reciprocating compressor;
fig. 2 is a cross-sectional view of an adjustment device according to the utility model.
In the figure: the device comprises a 1-crankcase, a 2-middle body, a 3-cylinder, a 4-adjusting device, a 31-cylinder body, a 32-compression cavity, a 33-air inlet cavity, a 34-return channel, a 41-connecting piece, a 42-flange plate, a 43-connecting rod, a 44-adjusting piston, a 45-containing hole, a 46-guiding hole, a 47-locking handle, a 48-adjusting nut, a 49-locking nut, a 50-oil filling port, a 51-air leakage recovery channel, a 52-radial channel, a 53-axial channel and a 54-return sealing ring.
Detailed Description
The present utility model is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
As shown in fig. 1 and 2, a reciprocating compressor with adjustable air flow comprises a crank case 1, wherein both sides of the crank case 1 are sequentially provided with a middle body 2 and an air cylinder 3, the air cylinder 3 comprises a cylinder body 31, a compression cavity 32 is arranged in the cylinder body 31, the structure belongs to the existing structure of the reciprocating compressor, and not described in detail herein, one end of the cylinder body 31 is connected with an adjusting device 4, a specific connection position is preferably arranged at the outer end of the air cylinder 3, and the adjusting device 4 is communicated with the compression cavity 32.
The adjusting device 4 specifically comprises a connecting piece 41, one end of the connecting piece 41 can stretch into the cylinder body 31 for a certain distance, positioning and installation of the connecting piece 41 are facilitated, a flange 42 is arranged on the connecting piece 41 and is connected with the cylinder body 31, a sealing ring is arranged between the flange 42 and the cylinder body 31, leakage of gas is avoided, a through hole is arranged in the center of the connecting piece 41 and can be communicated with the compression cavity 32, a movable connecting rod 43 is arranged in the through hole, an adjusting piston 44 is arranged at the end part of the connecting rod 43 close to the cylinder body 31 and is matched with the through hole, and a locking structure capable of locking the connecting rod 43 is arranged between the end part of the connecting rod 43 far away from the cylinder body 31 and the connecting piece 41;
the space of the compression chamber 32 is adjusted by means of the through hole on the connecting piece 41 and the adjusting piston 44 in the through hole, so that flexible adjustment of the air quantity is realized.
The connecting piece 41 is provided with a connecting channel which is communicated with a through hole far away from the adjusting piston 44, the cylinder body 31 is also provided with an air inlet cavity 33, the side wall of the cylinder body 31 at the position of the air inlet cavity 33 is provided with a return channel 34, and the return channel 34 can be used for communicating the connecting channel with the air inlet cavity 33. The connecting channel is preferably arranged on the flange of the connecting piece 41, and for facilitating the processing of the connecting channel, the connecting channel specifically comprises a radial channel 52 and an axial channel 53 communicated with the radial channel 52, wherein the axial channel 53 is communicated with the backflow channel 34, and for avoiding the gas leakage condition between the axial channel 53 and the backflow channel 34, a backflow sealing ring 54 is preferably arranged around the communication position of the axial channel 53 and the backflow channel 34 for sealing.
According to the utility model, the connecting channel at the other end of the adjusting piston 44 is communicated with the air inlet cavity 33 of the cylinder body 31, so that leaked compressed air can enter the air inlet cavity 33 through the gap between the adjusting piston 44 and the through hole, the gap between the connecting rod 43 and the through hole, the connecting channel and the backflow channel 34 in sequence, and the leaked compressed air can enter the air inlet cavity 33 for reuse, thereby reducing the kinetic energy loss of the compressed air, balancing the pressure at two sides of the adjusting piston 44, and improving the stress at two sides of the adjusting piston 44.
The through hole specifically comprises a containing hole 45 and a guide hole 46, the containing hole 45 is close to the cylinder body 31, the adjusting piston 44 moves in the containing hole 45, the diameter of the containing hole 45 is larger than that of the guide hole 46, so that the adjusting space of the compression cavity 32 is increased, the connecting rod 43 moves in the guide hole 46 in a guiding way, and in order to prevent gas leaking from the gap between the adjusting piston 44 and the through hole from leaking out through the gap between the guide hole 46 and the connecting rod 43, a sealing ring is preferably arranged between the guide hole 46 and the connecting rod 43, so that the tightness of the space at the rear end of the adjusting piston 44 is ensured.
The locking structure comprises a locking handle 47, a section of threaded hole is arranged at the end, far away from the guide hole 46 of the cylinder body 31, of the connecting piece 41, a section of external thread section is arranged on the connecting piece 41 and matched with the threaded hole, the external thread section extends out of the through hole and is in threaded connection with the locking handle 47, and the position of the connecting rod 43 is fixed by fastening of the locking handle 47.
In order to further facilitate the rotation adjustment of the connecting rod 43, the utility model preferably provides a rotation adjustment structure on the connecting rod 43 extending out of the through hole, and the rotation adjustment structure can drive the connecting rod 43 to rotate. The rotation adjusting structure specifically comprises an adjusting nut 48, wherein the adjusting nut 48 is connected with a connecting rod 43 extending out of a through hole through a key, a section of adjusting section is arranged at the outer end of the connecting rod 43 extending out of the through hole, the diameter of the adjusting section is smaller than that of an external thread section, one end of the adjusting nut 48 is abutted to the shaft shoulder of the adjusting section and the shaft shoulder of the external thread section, the other end of the adjusting nut 48 is provided with a locking nut 49, the locking nut 49 is in threaded connection with the adjusting section, and when the end face of the adjusting nut 48 is in contact with the end face of a locking handle 47, the adjusting piston 44 is located at a limit position. Of course, the rotation adjusting structure of the utility model can also directly arrange the structure of the inner hexagonal hole at the outermost end of the connecting rod 43, which can also ensure the rotation adjustment of the connecting rod 43, and meanwhile, the assembly of the connecting rod 43 and the through hole is not affected.
In addition, the side wall of the connecting piece 41 corresponding to the position of the guide hole 46 is preferably provided with a gas leakage recovery channel 51, so as to prevent the process gas from leaking into the atmosphere, the side wall of the connecting piece 41 corresponding to the position of the threaded hole is provided with an oil filling port 50, and a lubricating medium can be pumped into the connecting rod 43 through the oil filling port 50 for lubricating.
When the adjustment is required, the locking handle 47 is released, and then the adjusting nut 48 is screwed, and the adjusting nut 48 is driven with the connecting rod 43 through a key, so that the position of the adjusting piston 44 is adjusted, and the size of the compression chamber 32 is changed.
According to the utility model, the connecting piece 41 is arranged into an integral structure, and the related flange 42, the through hole, the threaded hole and the connecting channel are integrally arranged on the connecting piece 41, so that on one hand, the structural strength of the connecting piece 41 is ensured, the assembly is also convenient, and on the other hand, the adjustment of the connecting rod 43 and the backflow of leaked compressed gas are satisfied.
It should be understood that these examples are for the purpose of illustrating the utility model only and are not intended to limit the scope of the utility model. Furthermore, it is to be understood that various changes, modifications and/or variations may be made by those skilled in the art after reading the technical content of the present utility model, and that all such equivalents are intended to fall within the scope of protection defined in the claims appended hereto.
Claims (10)
1. The reciprocating compressor with the adjustable air quantity is characterized by comprising a crankcase, wherein the two sides of the crankcase are respectively provided with a middle body and an air cylinder in sequence, the air cylinder comprises a cylinder body, a compression cavity is arranged in the cylinder body, one end of the cylinder body is connected with an adjusting device, and the adjusting device is communicated with the compression cavity;
the adjusting device comprises a connecting piece, wherein a flange plate is arranged on the connecting piece and is connected with the cylinder body, a through hole is formed in the center of the connecting piece and can be communicated with the compression cavity, a movable connecting rod is arranged in the through hole, an adjusting piston is arranged at the end part of the connecting rod close to the cylinder body and is matched with the through hole, and a locking structure capable of locking the connecting rod is arranged between the end part of the connecting rod far away from the cylinder body and the connecting piece;
the connecting piece is provided with a connecting channel, the connecting channel is communicated with a through hole far away from the adjusting piston, the cylinder body is further provided with an air inlet cavity, the side wall of the cylinder body at the position of the air inlet cavity is provided with a backflow channel, and the backflow channel can be communicated with the connecting channel and the air inlet cavity.
2. The variable capacity reciprocating compressor of claim 1, wherein a sealing ring is provided between the flange and the cylinder.
3. The variable displacement reciprocating compressor of claim 1, wherein the through hole comprises a receiving hole and a guide hole, the receiving hole being adjacent to the cylinder, the adjusting piston moving in the receiving hole;
the connecting rod is guided to move in the guide hole, and a sealing ring is arranged between the guide hole and the connecting rod.
4. The variable displacement reciprocating compressor of claim 1, wherein the locking structure comprises a locking handle, a threaded hole is formed in the end, away from the guide hole of the cylinder body, of the locking structure, and an external thread section is formed in the connecting piece and matched with the threaded hole;
the external thread section extends out of the through hole and is in threaded connection with the locking handle.
5. The variable displacement reciprocating compressor of claim 4, wherein the connecting rod extending out of the through hole is provided with a rotation adjusting structure, and the rotation adjusting structure drives the connecting rod to rotate.
6. The variable displacement reciprocating compressor of claim 5, wherein the rotation adjusting structure comprises an adjusting nut, the adjusting nut being connected to the connecting rod extending out of the through hole by a key;
the outer end of the connecting rod extending out of the through hole is provided with an adjusting section, the diameter of the adjusting section is smaller than that of the external thread section, one end of the adjusting nut is abutted to the shaft shoulder of the adjusting section and the shaft shoulder of the external thread section, the other end of the adjusting nut is provided with a locking nut, and the locking nut is in threaded connection with the adjusting section.
7. A reciprocating compressor with adjustable air flow as claimed in claim 3, wherein said connecting member has an air leakage recovery passage provided in a side wall thereof corresponding to the position of said guide hole.
8. The variable displacement reciprocating compressor of claim 4, wherein the connecting member has a filler neck on a sidewall thereof corresponding to the location of the threaded hole.
9. A variable displacement reciprocating compressor as claimed in claim 1, wherein said connecting passage is provided on a flange of a connecting member, said connecting passage including a radial passage and an axial passage communicating with said radial passage, said axial passage communicating with said return passage.
10. A variable displacement reciprocating compressor as claimed in claim 9, wherein said axial passage is provided with a return seal around the location of communication with said return passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223561119.5U CN219262618U (en) | 2022-12-30 | 2022-12-30 | Reciprocating compressor with adjustable air quantity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223561119.5U CN219262618U (en) | 2022-12-30 | 2022-12-30 | Reciprocating compressor with adjustable air quantity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219262618U true CN219262618U (en) | 2023-06-27 |
Family
ID=86869137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223561119.5U Active CN219262618U (en) | 2022-12-30 | 2022-12-30 | Reciprocating compressor with adjustable air quantity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219262618U (en) |
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2022
- 2022-12-30 CN CN202223561119.5U patent/CN219262618U/en active Active
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