CN215890468U - Internal balance pipe structure of liquid spraying screw main machine - Google Patents
Internal balance pipe structure of liquid spraying screw main machine Download PDFInfo
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- CN215890468U CN215890468U CN202121569190.0U CN202121569190U CN215890468U CN 215890468 U CN215890468 U CN 215890468U CN 202121569190 U CN202121569190 U CN 202121569190U CN 215890468 U CN215890468 U CN 215890468U
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Abstract
The utility model relates to the field of liquid injection screw compressors, in particular to an internal balance tube structure of a liquid injection screw host, it can simplify the balance pipeline, ensure the sealing performance, avoid the phenomena of blockage and the like on the occasion with more dust particles, prolong the service life, which comprises a shell, wherein a screw rotor installation cavity and a bearing cavity are arranged in the shell, a rotating shaft connected with a screw rotor positioned in the screw rotor installation cavity is arranged in the bearing cavity, a main sealing mechanism and a front shaft sealing mechanism which are matched with the screw rotor are arranged in the bearing cavity, a gap is reserved between the preposed shaft sealing mechanism and the outer surface of the screw rotor, a nitrogen channel and a balance channel are arranged on the shell, the balance channel is characterized by comprising a groove arranged on the inner wall of the screw rotor mounting cavity, and the groove corresponds to the low-pressure tooth groove of the rotor.
Description
Technical Field
The utility model relates to the field of liquid injection screw compressors, in particular to an internal balance tube structure of a liquid injection screw host.
Background
Liquid injection screw compressors are generally used for conveying special gas media which are often flammable, explosive, toxic and harmful, and as a cooling means, liquid such as water, diesel oil and other media are often injected into a compressed gas chamber for cooling. The shaft seal structure is usually combined by one or more structures of carbon ring, sparse tooth, mechanical seal, dry gas seal and the like according to different common occasions. On the premise of ensuring the sealing performance, the injection pressure of nitrogen is reduced, thereby being beneficial to reducing the consumption of nitrogen and achieving the purpose of reducing the running cost of the compressor, therefore, the pressure balance communicating pipe is arranged at the shaft seal position of the high-pressure side of the main machine of the screw compressor to be an integral means, the balance communicating pipe is often arranged between the nitrogen injection port and the end face of the working section of the screw rotor, the pressure of the compressed gas is reduced in advance, and the purpose of reducing the injection pressure of nitrogen is achieved.
The current balanced tube structure often adopts outside pipeline intercommunication balanced mode, as shown in fig. 1, 1 is main seal mechanism, 2 is the casing, 3 is leading shaft seal mechanism, 4 is the nitrogen gas passageway, 5 is the external balance pipe, 6 is screw rotor, the shortcoming of existence is obvious, for example the complexity and the leakage point that have increased the pipeline, contain the more gaseous occasion of solid dust particulate matter in the compression, thereby often cause the jam of bearing seal position wearing and tearing aggravation and balanced pipe to influence balanced effect easily, further lead to the nitrogen gas sealing effect inefficacy. In addition, external piping design imperfections can result in pressure distortion at the pressure take-off point, etc.
Disclosure of Invention
In order to solve the problems that an existing balance pipeline is complex, leakage points easily exist, and the existing balance pipeline cannot adapt to occasions with more dust particles, the utility model provides an internal balance pipe structure of a liquid spraying screw rod host, which can simplify the balance pipeline, ensure the sealing performance, avoid the phenomena of blockage and the like in the occasions with more dust particles, and prolong the service life.
The technical scheme is as follows: the utility model provides an inside balanced tubular construction of hydrojet screw rod host computer, its includes the casing, be provided with screw rotor installation cavity and bearing chamber in the casing, install the pivot of connecting the screw rotor who is located the screw rotor installation cavity in the bearing chamber, be provided with in the bearing chamber with screw rotor complex main seal mechanism and leading axle seal mechanism, leading axle seal mechanism with leave the clearance between the screw rotor surface, nitrogen gas passageway and balanced passageway have been seted up on the casing, its characterized in that, balanced passageway is including seting up in the recess of screw rotor installation intracavity wall, the recess corresponds the low pressure tooth's socket of rotor.
The balance channel is further characterized by also comprising a first channel and a second channel, wherein the first channel penetrates through the shell and is communicated with the outside of the shell and the bearing cavity, the second channel is communicated with the side wall of the first channel and the groove, and the groove is an arc-shaped groove close to the inner wall of the screw rotor mounting cavity;
the nitrogen channel is arranged on one side, close to the main sealing mechanism, of the front shaft sealing mechanism, and the first channel is located in the middle of the front shaft sealing mechanism;
the first channel is arranged on one side, away from the main sealing mechanism, of the front shaft sealing mechanism, and the nitrogen channel is located in the middle of the front shaft sealing mechanism;
the grooves are radial grooves corresponding to the center of the rotor, one end of each radial groove is opened and extends to the screw rotor, the other end of each radial groove is closed and extends to the low-pressure side, and a plurality of radial grooves are arranged at intervals;
the front shaft sealing structure is a carbon ring or sparse tooth structure.
After the utility model is adopted, a balance external pipeline is cancelled, and the balance channel is arranged in the shell, thereby simplifying a pipeline system, reducing the injection pressure of nitrogen and the consumption of nitrogen, reducing the abrasion of particles on the sealing structure of the front shaft when the gas containing more dust particles is compressed, weakening the blocking phenomenon of the sealing part, prolonging the service life and prolonging the maintenance period.
Drawings
FIG. 1 is a schematic diagram of a prior art structure;
FIG. 2 is a schematic view of an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic view of a second embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;
FIG. 6 is a third schematic view of the present invention;
fig. 7 is a cross-sectional view taken along line C-C of fig. 6.
Detailed Description
A balance pipe structure in a liquid spraying screw host comprises a shell 2, a screw rotor installation cavity 2-1 and a bearing cavity 2-2 are arranged in the shell 2, a rotating shaft 8 connected with a screw rotor 6 located in the screw rotor installation cavity 2-1 is arranged in the bearing cavity 2-2, a main sealing mechanism 1 (which can be any one of carbon ring, mechanical and dry gas sealing) and a front shaft sealing mechanism 3 which are matched with the screw rotor 6 are arranged in the bearing cavity 2-2, a gap is reserved between the front shaft sealing mechanism 3 and the outer wall of the screw rotor 6, the front shaft sealing mechanism can be a carbon ring or a sparse tooth structure, a nitrogen channel 4 and a balance channel 7 are formed in the shell 2, and the balance channel 7 comprises a groove 7-1 formed in the low-pressure side of the inner wall of the screw rotor installation cavity 2-1.
The first embodiment is as follows: as shown in fig. 2 and 3, the balance channel comprises a first channel 7-2 and a second channel 7-3 besides the groove 7-1, the first channel 7-2 penetrates through the housing 2 to communicate the outside of the housing 2 with the bearing cavity 2-2, the second channel 7-3 communicates the side wall of the first channel 7-2 with the groove 7-1, and the groove 7-1 is an arc-shaped groove close to the inner wall of the screw rotor mounting cavity 2-1; the nitrogen channel 4 is arranged on one side of the front shaft sealing mechanism 3 close to the main sealing mechanism 1, the first channel 7-2 is arranged in the middle of the front shaft sealing mechanism 3, the first channel 7-2, the second channel 7-3 and the groove 7-1 play a role in reducing the internal gas pressure of the sealed part, and the channels and the groove have enough flow area to realize internal balance.
Example two: as shown in fig. 4 and 5, the balance channel comprises a first channel 7-2 and a second channel 7-3 besides the groove 7-1, the first channel 7-2 penetrates through the housing 2 to communicate the outside of the housing 2 with the bearing cavity 2-2, the second channel 7-3 communicates the side wall of the first channel 7-2 with the groove 7-1, and the groove 7-1 is an arc-shaped groove close to the inner wall of the screw rotor mounting cavity 2-1; the first channel 7-2 is arranged on one side, far away from the main sealing mechanism 1, of the front shaft sealing mechanism 3, the nitrogen channel 4 is located in the middle of the front shaft sealing mechanism 3, the first channel 7-2, the second channel 7-3 and the groove 7-1 play a role in reducing the internal gas pressure of a sealed part, the channels and the groove have enough flow area to realize internal balance, and the length of the second channel 7-3 is shortened under the structure, so that the length of a short shaft can be shortened, and the rigidity of a rotating shaft is improved.
Example three: as shown in fig. 6 and 7, the balance channel 7 only includes a groove 7-1 opened on the low-pressure side of the inner wall of the screw rotor installation cavity 2-1, the groove 7-1 is a radial groove corresponding to the center of the rotor, and is communicated with the radial groove through a gap, an opening at one end of the radial groove extends to the screw rotor 6, the other end of the radial groove is closed and extends to the low-pressure side, a plurality of radial grooves are arranged at intervals, and generally three grooves are arranged at each screw rotor 6.
The second embodiment and the third embodiment are beneficial to reducing the accumulation of solid particles contained in the compressed gas at the front shaft sealing mechanism 3, reducing the grinding of the rotary shaft and the sealing mechanism, improving the sealing effect, prolonging the service life of the rotor and prolonging the maintenance period.
Claims (6)
1. The utility model provides an inside balanced tubular construction of hydrojet screw rod host computer, its includes the casing, be provided with screw rotor installation cavity and bearing chamber in the casing, install the pivot of connecting the screw rotor who is located the screw rotor installation cavity in the bearing chamber, be provided with in the bearing chamber with screw rotor complex main seal mechanism and leading axle seal mechanism, leading axle seal mechanism with leave the clearance between the screw rotor surface, nitrogen gas passageway and balanced passageway have been seted up on the casing, its characterized in that, balanced passageway is including seting up in the recess of screw rotor installation intracavity wall, the recess corresponds the low pressure tooth's socket of rotor.
2. The internal balance tube structure of a liquid spray screw host machine of claim 1, wherein the balance channel further comprises a first channel and a second channel, the first channel extends through the housing to communicate the exterior of the housing and the bearing cavity, the second channel communicates the side wall of the first channel with the groove, and the groove is an arc-shaped groove close to the inner wall of the screw rotor mounting cavity.
3. The internal balance tube structure of a liquid spray screw host machine as claimed in claim 2, wherein the nitrogen channel is disposed on a side of the front shaft seal mechanism adjacent to the main seal mechanism, and the first channel is located at a middle position of the front shaft seal mechanism.
4. The internal balance tube structure of a liquid spray screw host machine of claim 2, wherein the first channel is disposed on a side of the front shaft seal mechanism away from the main seal mechanism, and the nitrogen channel is disposed at a middle position of the front shaft seal mechanism.
5. The internal balance tube structure of the liquid spray screw host machine of claim 1, wherein the groove is a radial groove corresponding to the center of the rotor, one end of the radial groove is open and extends to the screw rotor, the other end of the radial groove is closed and extends to the low-pressure side, and a plurality of radial grooves are arranged at intervals.
6. The internal balance tube structure of a liquid spray screw host machine of claim 1, wherein the leading shaft sealing structure is a carbon ring or a sparse tooth structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121569190.0U CN215890468U (en) | 2021-07-12 | 2021-07-12 | Internal balance pipe structure of liquid spraying screw main machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121569190.0U CN215890468U (en) | 2021-07-12 | 2021-07-12 | Internal balance pipe structure of liquid spraying screw main machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215890468U true CN215890468U (en) | 2022-02-22 |
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ID=80561897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121569190.0U Active CN215890468U (en) | 2021-07-12 | 2021-07-12 | Internal balance pipe structure of liquid spraying screw main machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215890468U (en) |
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2021
- 2021-07-12 CN CN202121569190.0U patent/CN215890468U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Reinsurance Finance Leasing Co.,Ltd. Assignor: WUXI XIYA COMPRESSOR CO.,LTD. Contract record no.: X2023980035052 Denomination of utility model: Internal balance pipe structure of a liquid spraying screw host Granted publication date: 20220222 License type: Exclusive License Record date: 20230425 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Internal balance pipe structure of a liquid spraying screw host Effective date of registration: 20230427 Granted publication date: 20220222 Pledgee: Jiangsu Reinsurance Finance Leasing Co.,Ltd. Pledgor: WUXI XIYA COMPRESSOR CO.,LTD. Registration number: Y2023980039370 |