CN203114714U - Gas oil seal pressure boosting device for semi-open type centrifugal water chilling unit - Google Patents
Gas oil seal pressure boosting device for semi-open type centrifugal water chilling unit Download PDFInfo
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- CN203114714U CN203114714U CN 201220583516 CN201220583516U CN203114714U CN 203114714 U CN203114714 U CN 203114714U CN 201220583516 CN201220583516 CN 201220583516 CN 201220583516 U CN201220583516 U CN 201220583516U CN 203114714 U CN203114714 U CN 203114714U
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- open type
- type centrifugal
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Abstract
The utility model relates to a gas oil seal pressure boosting device for a semi-open type centrifugal water chilling unit. The gas oil seal pressure boosting device comprises a compressor exhaust opening gas seal pipeline used for inflating high-pressure gas into the sealed end of a motor shaft, wherein a bypass pipeline is connected onto the compressor exhaust opening gas seal pipeline, a gas compressor used for introducing high-pressure gas into the bypass pipeline is connected in series onto the bypass pipeline, through the pressurization by the gas compressor, the gas seal pressure during the machine starting of the unit is increased, the end sealing effect of the motor shaft is enhanced, and the lubricating oil leakage phenomenon caused by gas seal incompleteness in the machine starting process is prevented.
Description
Technical field
The utility model relates to a kind of semi-open type centrifugal refrigerating machines gas oil sealing supercharging device.
Background technique
Because semi-open type centrifugal refrigerating machines motor shaft extension end flange directly is connected with the gear housing flange, the shaft end seal at motor two ends often adopts mechanical seal or labyrinth seal to add the combination seal of sealing gland.Though mechanical seal significant sealing affection, but because sealing belongs to contact seal, need periodic replacement wear-out part and the process of replacing very complicated, so generally adopt labyrinth seal to add the combination seal form of sealing gland at the semi-open type centrifugal refrigerating machines in the industry.
Effect was remarkable when this combination seal normally moved in centrifugal refrigerating machines, but sealing effect is relatively poor in opening the machine process, caused less amount of lubrication oil to be run in the motor by gear housing.This is because the sealing gland gas source in this combination seal is a small amount of high pressure air of unit self centrifugal compressor relief opening, and it is low to open in the machine process compressor air-discharging mouth pressure at unit, is not enough to reach the effect of sealing fully.Unit is if frequently open machine, cause in the gear housing oil level low excessively easily, so that unit can't normally move even because oil starvation causes rotor and damage of the bearing.
Summary of the invention
The technical problems to be solved in the utility model provides that a kind of to guarantee that handpiece Water Chilling Units opens in the machine process pressure enough and increase the motor device in working life.
For achieving the above object, the technological scheme that the utility model has adopted is a kind of semi-open type centrifugal refrigerating machines gas oil sealing supercharging device, comprise for the exhaust outlet of compressor sealing gland pipeline that charges into pressurized gas to the motor shaft sealed end, be connected with the bypass line that feeds pressurized gas to it at described exhaust outlet of compressor sealing gland pipeline.
The beneficial effects of the utility model are: after adopting said apparatus, at Qi Jishi, because the bypass line that exhaust outlet of compressor sealing gland pipeline connects has fed pressurized gas, can effectively increase the sealing gland pressure when opening machine, strengthen the motor shaft end seal effect, prevent from opening and occur lubricant oil in the machine process and run oily phenomenon, guarantee the normal operation of unit, prevent the wearing and tearing of electric machine assembly, increase the life-span of motor.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Code name implication among the figure: 1 motor, 2 bypass lines, 3 gas compressors, 4 exhaust outlet of compressor sealing gland pipelines, 5 stop valves, 6 one-way valves, 7 sealing gland pressure transducers, 8 compressor discharge pressure sensor, 9 microcomputer control cabinets
Embodiment
As shown in Figure 1, a kind of semi-open type centrifugal refrigerating machines gas oil sealing supercharging device, comprise for the exhaust outlet of compressor sealing gland pipeline 4 that charges into pressurized gas to the motor shaft sealed end, be connected with the bypass line 2 that feeds pressurized gas to it at described exhaust outlet of compressor sealing gland pipeline 4.Adopt this mode, at Qi Jishi, because the bypass line 2 that exhaust outlet of compressor sealing gland pipeline 4 connects has fed pressurized gas, can effectively increase the sealing gland pressure when opening machine.
Preferably, series connection gas compressor 3 and stop valve 5 on the described bypass line 2, series connection one-way valve 6 on the described exhaust outlet of compressor sealing gland pipeline 4.To bypass bypass 2 feeding pressurized gas, series connection stop valve 5 prevents that closing back gas at it continues by gas compressor 3 by gas compressor 3, and one-way valve 6 assurance pressurized gas can not flow backwards and enter exhaust outlet of compressor.
Preferably, the sealing gland pressure transducer 7 for detection of motor shaft sealed end gas pressure is installed on the described exhaust outlet of compressor sealing gland pipeline 4, at compressor box compressor discharge pressure sensor 8 is installed.Described sealing gland pressure transducer 7 all links to each other with a unit microcomputer control cabinet 9 with compressor discharge pressure sensor 8.Sensor is sent to microcomputer control cabinet 9 with detected pressure, and microcomputer control cabinet 9 is according to the operation of pressure robot brain group.
Embodiment is as follows: increase bypass line 2 at exhaust outlet of compressor sealing gland pipeline 4 earlier, be in series with the stop valve 5 of gas compressor 3 and normally off on the bypass line 2, again at exhaust outlet of compressor sealing gland pipeline 4 series connection one-way valves 6.Centrifugal refrigerating machines is at Qi Jishi, and microcomputer control cabinet 9 is opened the stop valve 5 on the bypass line 2 earlier, makes bypass line 2 be in connected state; After treating that stop valve 5 is opened, gas compressor 3 from exhaust outlet of compressor air-breathing and pressurization send into exhaust outlet of compressor sealing gland pipeline 4, because the high pressure air that the effect of one-way valve 6 causes gas compressor 3 to be discharged can only be as the shaft end seal at sealing gland gas flow motor 1 two ends, exhaust outlet of compressor can not flow backwards back; Unit enters and normally opens the machine flow process then; Treat that microcomputer control cabinet 9 monitors unit and opens behind the machine operation 15min and the difference between sealing gland pressure transducer 7 and the compressor discharge pressure sensor 8 when being not less than 120kPa, automatically stop gas compressor 3, no longer continue to provide pressurized gas to exhaust outlet of compressor sealing gland pipeline 4, close stop valve 5 then and cut off bypass line 2; Last unit enters normal operational process.
Claims (4)
1. semi-open type centrifugal refrigerating machines gas oil sealing supercharging device, comprise for the exhaust outlet of compressor sealing gland pipeline (4) that charges into pressurized gas to the motor shaft sealed end, it is characterized in that: be connected with the bypass line (2) that feeds pressurized gas to it at described exhaust outlet of compressor sealing gland pipeline (4).
2. semi-open type centrifugal refrigerating machines gas oil sealing supercharging device according to claim 1, it is characterized in that: described bypass line (2) is gone up series connection gas compressor (3) and stop valve (5), and described exhaust outlet of compressor sealing gland pipeline (4) is gone up series connection one-way valve (6).
3. semi-open type centrifugal refrigerating machines gas oil sealing supercharging device according to claim 1, it is characterized in that: described exhaust outlet of compressor sealing gland pipeline (4) is gone up the sealing gland pressure transducer of installing for detection of motor shaft sealed end gas pressure (7), at compressor box compressor discharge pressure sensor (8) is installed.
4. semi-open type centrifugal refrigerating machines gas oil sealing supercharging device according to claim 3, it is characterized in that: described sealing gland pressure transducer (7) all links to each other with a unit microcomputer control cabinet (9) with compressor discharge pressure sensor (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220583516 CN203114714U (en) | 2012-11-07 | 2012-11-07 | Gas oil seal pressure boosting device for semi-open type centrifugal water chilling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220583516 CN203114714U (en) | 2012-11-07 | 2012-11-07 | Gas oil seal pressure boosting device for semi-open type centrifugal water chilling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203114714U true CN203114714U (en) | 2013-08-07 |
Family
ID=48895064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220583516 Expired - Fee Related CN203114714U (en) | 2012-11-07 | 2012-11-07 | Gas oil seal pressure boosting device for semi-open type centrifugal water chilling unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203114714U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747490A (en) * | 2015-02-16 | 2015-07-01 | 沈阳鼓风机集团自动控制系统工程有限公司 | Bearing-oil-sealed buffer gas pressure control method |
-
2012
- 2012-11-07 CN CN 201220583516 patent/CN203114714U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747490A (en) * | 2015-02-16 | 2015-07-01 | 沈阳鼓风机集团自动控制系统工程有限公司 | Bearing-oil-sealed buffer gas pressure control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20161107 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |