CN105114134A - Device and method for preventing steam turbine shaft seal from leakage - Google Patents
Device and method for preventing steam turbine shaft seal from leakage Download PDFInfo
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- CN105114134A CN105114134A CN201510539446.6A CN201510539446A CN105114134A CN 105114134 A CN105114134 A CN 105114134A CN 201510539446 A CN201510539446 A CN 201510539446A CN 105114134 A CN105114134 A CN 105114134A
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- steam turbine
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Abstract
The invention relates to a device and method for preventing a steam turbine shaft seal from leakage. Currently, no device which can solve the leakage problem of a steam turbine shaft seal from the root exists. The device for preventing the steam turbine shaft seal from leakage comprises a steam turbine which is provided with a shaft seal system, and the device is characterized by further comprising an air compressor, an air storage tank, an air drier and a shaft seal gap position nozzle block; the air storage tank is connected with the air compressor through a pipeline, the air drier is connected with the air storage tank through a pipeline, the shaft seal gap position nozzle block is connected with the air drier through a pipeline, and the shaft seal gap position nozzle block is distributed adjacent to the shaft seal system. A method for preventing the steam turbine shaft seal from leakage comprises the steps that the air compressor generates compressed air of high pressure, the compressed air is conveyed to the position of the shaft seal gap position nozzle block through the air storage tank and the air drier, the air is blasted to the shaft seal system, a high pressure air field is formed outside the shaft seal system, and the purpose of preventing the shaft seal system from leaking sealed steam outward is achieved. The device for preventing the steam turbine shaft seal from leakage is simple in structure, and the leakage problem of the steam turbine shaft seal is solved from the root.
Description
Technical field
The present invention relates to one and prevent turbine shaft leak sealing vapour device and method.
Background technique
Along with the continuous operation of thermal power generation unit, turbine shaft seal gap can be increasing, inside and outside shaft seal, Steam loss constantly increases, cause the situation that working medium runs off, vacuum declines, turbine efficiency is caused to decline, especially gland packing leakage can cause turbine shafting badly damaged to the pollution of turbo-engine lube, and produces serious accident.
At present, those skilled in the art are in order to solve the problem of turbine shaft leak sealing vapour, usually the mode that steam turbine gland system itself is improved all is adopted, if publication date is on 04 16th, 2014, publication number is in the Chinese patent of CN203547804U, disclose a kind of aeroseal formula steam turbine gland system, and publication date is on November 01st, 2006, publication number is in the Chinese patent of CN2833118, disclose a kind of gland seal circuit of steam turbine, all that steam turbine gland system itself is improved, cause the complex structure of steam turbine gland system, be difficult to carry out upgrading to the existing steam turbine using, also the problem fundamentally solving turbine shaft leak sealing vapour is difficult to.
Also do not have now a kind of structure simple, fundamentally can solve the device of turbine shaft leak sealing vapour problem.
Summary of the invention
The object of the invention is to overcome above shortcomings in prior art, and provide a kind of structure simple, reasonable in design, design is unique, and what fundamentally can solve turbine shaft leak sealing vapour problem prevents turbine shaft leak sealing vapour device and method.
The present invention's adopted technological scheme that solves the problem is: this prevents turbine shaft leak sealing vapour device from comprising the steam turbine being provided with gland seal system, its structural feature is: also comprise the air compressor for generation of high-pressure air, for storing high-pressure air that air compressor produces and high-pressure air being carried out to the gas holder of voltage stabilizing, for carrying out fully dry air drier to the high-pressure air exported from gas holder, for carrying out to the gland seal system of steam turbine jet and forming high-pressure air field to reach the shaft seal gap location nozzle sets of the object stoping the outside leakage sealed steam of gland seal system outside gland seal system, described gas holder is connected by pipeline with air compressor, described air drier is connected by pipeline with gas holder, described shaft seal gap location nozzle sets is connected by pipeline with air drier, described shaft seal gap location nozzle sets is distributed near the gland seal system of steam turbine, and this shaft seal gap location nozzle sets and gland seal system coordinate.
As preferably, the present invention also comprises valve, on the pipeline of described valve installation between air drier and shaft seal gap location nozzle sets.
As preferably, shaft seal gap location nozzle sets of the present invention is distributed in the both sides of steam turbine, and this shaft seal gap location nozzle sets is positioned at nozzle quantity on the every side of steam turbine all in two or more.
As preferably, the quantity of valve of the present invention is in two or more.
A kind of use described prevent turbine shaft leak sealing vapour device from carrying out prevent turbine shaft leak sealing vapour method, its feature is: described in prevent the step of turbine shaft leak sealing vapour method as follows: air compressor produces the pressurized air of high pressure, pressurized air is after the gas storage voltage stabilizing of gas holder and the abundant drying of air drier, by Pipeline transport to shaft seal gap location nozzle sets, carry out jet by shaft seal gap location nozzle sets to the gland seal system of steam turbine, thus form high-pressure air field outward at gland seal system, reach the object stoping the outside leakage sealed steam of gland seal system.
As preferably, shaft seal gap location nozzle sets of the present invention is more than or equal to the vapor pressure in the gland seal system of steam turbine outward at the pressure of the high-pressure air field that gland seal system is formed.
As preferably, the method of the invention prevents the steam in the gland seal system of steam turbine from leaking and leaks the lubricating oil system of rear steam contamination steam turbine, thus play and prevent from steam in steam turbine from leaking outside causing unnecessary steam to run off, prevent steam turbine vacuum from declining, improve safety in operation and the efficiency of steam turbine.
The present invention compared with prior art, have the following advantages and effect: 1, shaft seal gap location nozzle sets effectively stops steam in gland seal system to external leakage outward in the high_voltage isolation air field that the gland seal system of steam turbine produces, improve the sealing effect of gland seal system, overcome the Universal Problems that steam-turbine working medium runs off and vacuum declines, specifically avoid turbo-engine lube pollution problem; 2, relevant equipment purchasing and mounting cost low, reduce cost, be conducive to promotion and application; 3, input of the present invention can improve the safe operating life of steam turbine and gland seal system, and improves the working efficiency of steam turbine; 4, structure is very simple, design is unique, the mode adopting the gland seal system outer high-pressure air field formed to be pushed down by the steam in gland seal system, not only reduces the performance requirement of steam turbine to gland seal system, and fundamentally solves the problem of turbine shaft leak sealing vapour; 5, can carry out upgrading at the steam turbine used to existing easily, expand applicable surface.
Accompanying drawing explanation
Fig. 1 is the structural representation preventing turbine shaft leak sealing vapour device in the embodiment of the present invention.
In figure: 1, air compressor; 2, gas holder; 3, air drier; 4, shaft seal gap location nozzle sets; 5, steam turbine.
Embodiment
Below in conjunction with accompanying drawing, also by embodiment, the present invention is described in further detail, and following examples are explanation of the invention and the present invention is not limited to following examples.
Embodiment.
See Fig. 1, prevent turbine shaft leak sealing vapour device from comprising the steam turbine 5 being provided with gland seal system in the present embodiment, valve, for generation of the air compressor 1 of high-pressure air, for storing high-pressure air that air compressor 1 produces and high-pressure air being carried out to the gas holder 2 of voltage stabilizing, for carrying out fully dry air drier 3 to the high-pressure air exported from gas holder 2, for carrying out to the gland seal system of steam turbine 5 jet and forming high-pressure air field to reach the shaft seal gap location nozzle sets 4 of the object stoping the outside leakage sealed steam of gland seal system outside gland seal system.
Gas holder 2 in the present embodiment is connected by pipeline with air compressor 1, and air drier 3 is connected by pipeline with gas holder 2, and shaft seal gap location nozzle sets 4 is connected by pipeline with air drier 3.Shaft seal gap location nozzle sets 4 is distributed near the gland seal system of steam turbine 5, this shaft seal gap location nozzle sets 4 and gland seal system coordinate, when making shaft seal gap location nozzle sets 4 carry out jet to the gland seal system of steam turbine 5, high-pressure air field can be formed outward at gland seal system.On the pipeline of valve installation between air drier 3 and shaft seal gap location nozzle sets 4.
Under normal circumstances, in the present embodiment, shaft seal gap location nozzle sets 4 is distributed in the both sides of steam turbine 5, and this shaft seal gap location nozzle sets 4 is positioned at nozzle quantity on the every side of steam turbine 5 all in two or more; The quantity of valve is in two or more.
What in the present embodiment, use prevented turbine shaft leak sealing vapour device from carrying out prevents the step of turbine shaft leak sealing vapour method as follows: air compressor 1 produces the pressurized air of high pressure, pressurized air is after the gas storage voltage stabilizing of gas holder 2 and the abundant drying of air drier 3, by Pipeline transport to shaft seal gap location nozzle sets 4, carry out jet by shaft seal gap location nozzle sets 4 to the gland seal system of steam turbine 5, thus form high-pressure air field outward at gland seal system, reach the object stoping the outside leakage sealed steam of gland seal system.
Under normal circumstances, shaft seal gap location nozzle sets 4 is more than or equal to the vapor pressure in the gland seal system of steam turbine 5 outward at the pressure of the high-pressure air field that gland seal system is formed.
Prevent turbine shaft leak sealing vapour method from preventing the steam in the gland seal system of steam turbine 5 from leaking and leaking the lubricating oil system of rear steam contamination steam turbine 5 in the present embodiment, thus play and prevent from steam in steam turbine 5 from leaking outside causing unnecessary steam to run off, prevent steam turbine 5 vacuum from declining, improve safety in operation and the efficiency of steam turbine 5.
The turbine shaft leak sealing vapour device that prevents in the present embodiment produces high pressure dry air by setting up a set of air compressor system, form a high_voltage isolation air field outward to stop common gland seal system steam leakage phenomenon by shaft seal gap location nozzle sets 4 at the gland seal system of steam turbine 5, and Leakage prevention steam contamination steam turbine lubricant oil causes steam turbine major accident.
In addition, it should be noted that, the specific embodiment described in this specification, the shape, institute's title of being named etc. of its parts and components can be different, and the above content described in this specification is only to structure example of the present invention explanation.The equivalence change that structure, feature and the principle of all foundations described in inventional idea of the present invention are done or simple change, be included in the protection domain of patent of the present invention.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment; only otherwise depart from structure of the present invention or surmount this scope as defined in the claims, protection scope of the present invention all should be belonged to.
Claims (7)
1. one kind prevents turbine shaft leak sealing vapour device, comprise the steam turbine (5) being provided with gland seal system, it is characterized in that: also comprise the air compressor (1) for generation of high-pressure air, for storing high-pressure air that air compressor (1) produces and high-pressure air being carried out to the gas holder (2) of voltage stabilizing, for carrying out fully dry air drier (3) to the high-pressure air exported from gas holder (2), for carrying out to the gland seal system of steam turbine (5) jet and forming high-pressure air field outward to reach the shaft seal gap location nozzle sets (4) of the object stoping the outside leakage sealed steam of gland seal system at gland seal system, described gas holder (2) is connected by pipeline with air compressor (1), described air drier (3) is connected by pipeline with gas holder (2), described shaft seal gap location nozzle sets (4) is connected by pipeline with air drier (3), described shaft seal gap location nozzle sets (4) is distributed near the gland seal system of steam turbine (5), and this shaft seal gap location nozzle sets (4) and gland seal system coordinate.
2. according to claim 1ly prevent turbine shaft leak sealing vapour device, it is characterized in that: also comprise valve, on the pipeline of described valve installation between air drier (3) and shaft seal gap location nozzle sets (4).
3. according to claim 1ly prevent turbine shaft leak sealing vapour device, it is characterized in that: described shaft seal gap location nozzle sets (4) is distributed in the both sides of steam turbine (5), this shaft seal gap location nozzle sets (4) is positioned at nozzle quantity on the every side of steam turbine (5) all in two or more.
4. according to claim 1ly prevent turbine shaft leak sealing vapour device, it is characterized in that: the quantity of described valve is in two or more.
5. one kind use as described in claim as arbitrary in claim 1-4 prevent turbine shaft leak sealing vapour device from carrying out prevent turbine shaft leak sealing vapour method, it is characterized in that: described in prevent the step of turbine shaft leak sealing vapour method as follows: air compressor (1) produces the pressurized air of high pressure, pressurized air is after the gas storage voltage stabilizing of gas holder (2) and the abundant drying of air drier (3), by Pipeline transport to shaft seal gap location nozzle sets (4), carry out jet by shaft seal gap location nozzle sets (4) to the gland seal system of steam turbine (5), thus form high-pressure air field outward at gland seal system, reach the object stoping the outside leakage sealed steam of gland seal system.
6. according to claim 5ly prevent turbine shaft leak sealing vapour method, it is characterized in that: described shaft seal gap location nozzle sets (4) is more than or equal to the vapor pressure in the gland seal system of steam turbine (5) outward at the pressure of the high-pressure air field that gland seal system is formed.
7. according to claim 5ly prevent turbine shaft leak sealing vapour method, it is characterized in that: described method prevents the steam in the gland seal system of steam turbine (5) from leaking and leaks the lubricating oil system of rear steam contamination steam turbine (5), thus play and prevent from steam turbine (5) interior steam from leaking outside causing unnecessary steam to run off, prevent steam turbine (5) vacuum from declining, improve safety in operation and the efficiency of steam turbine (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510539446.6A CN105114134A (en) | 2015-08-30 | 2015-08-30 | Device and method for preventing steam turbine shaft seal from leakage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510539446.6A CN105114134A (en) | 2015-08-30 | 2015-08-30 | Device and method for preventing steam turbine shaft seal from leakage |
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| CN105114134A true CN105114134A (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510539446.6A Pending CN105114134A (en) | 2015-08-30 | 2015-08-30 | Device and method for preventing steam turbine shaft seal from leakage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749736A (en) * | 2020-05-20 | 2020-10-09 | 中国核动力研究设计院 | Supercritical carbon dioxide turbine dry gas seal failure protection device and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2569780A1 (en) * | 1984-08-30 | 1986-03-07 | Worthington Turbodyne | Sealing and pressurisation process and device for the outlets of shafts of oil-free air compressors |
| CN101392834A (en) * | 2007-09-19 | 2009-03-25 | 中国铝业股份有限公司 | Hermetic sealing steam baffle structure |
| CN201857999U (en) * | 2010-09-30 | 2011-06-08 | 浙江富春江环保热电股份有限公司 | Compressed air sealing device for oil seal |
| CN202418590U (en) * | 2012-01-06 | 2012-09-05 | 山东齐鲁电机制造有限公司 | Oil deflector ring for bearing box of steam turbine |
| CN203547804U (en) * | 2013-11-12 | 2014-04-16 | 万逵芳 | Airtight turbine shaft seal system |
| CN203809060U (en) * | 2014-01-06 | 2014-09-03 | 刘峰 | Compressed air isolating device for high pressure cylinder front shaft seal of turboset |
| CN204457882U (en) * | 2015-03-11 | 2015-07-08 | 马鞍山当涂发电有限公司 | A kind of combined type bearing housing shaft end seal system |
-
2015
- 2015-08-30 CN CN201510539446.6A patent/CN105114134A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2569780A1 (en) * | 1984-08-30 | 1986-03-07 | Worthington Turbodyne | Sealing and pressurisation process and device for the outlets of shafts of oil-free air compressors |
| CN101392834A (en) * | 2007-09-19 | 2009-03-25 | 中国铝业股份有限公司 | Hermetic sealing steam baffle structure |
| CN201857999U (en) * | 2010-09-30 | 2011-06-08 | 浙江富春江环保热电股份有限公司 | Compressed air sealing device for oil seal |
| CN202418590U (en) * | 2012-01-06 | 2012-09-05 | 山东齐鲁电机制造有限公司 | Oil deflector ring for bearing box of steam turbine |
| CN203547804U (en) * | 2013-11-12 | 2014-04-16 | 万逵芳 | Airtight turbine shaft seal system |
| CN203809060U (en) * | 2014-01-06 | 2014-09-03 | 刘峰 | Compressed air isolating device for high pressure cylinder front shaft seal of turboset |
| CN204457882U (en) * | 2015-03-11 | 2015-07-08 | 马鞍山当涂发电有限公司 | A kind of combined type bearing housing shaft end seal system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749736A (en) * | 2020-05-20 | 2020-10-09 | 中国核动力研究设计院 | Supercritical carbon dioxide turbine dry gas seal failure protection device and method |
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Application publication date: 20151202 |