CN2818791Y - Low-pressure turbine oil safe system of steam turbine - Google Patents
Low-pressure turbine oil safe system of steam turbine Download PDFInfo
- Publication number
- CN2818791Y CN2818791Y CN 200520040582 CN200520040582U CN2818791Y CN 2818791 Y CN2818791 Y CN 2818791Y CN 200520040582 CN200520040582 CN 200520040582 CN 200520040582 U CN200520040582 U CN 200520040582U CN 2818791 Y CN2818791 Y CN 2818791Y
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- oil
- overspeed protection
- safety
- turbine
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Abstract
The utility model relates to a low pressure turbine oil safety protection system of steam turbines, which is a low pressure turbine oil safety protection system of steam turbines, the utility model comprises a safety oil circuit part and a mechanical ultra-speed and breaking resetting part, and the mechanical ultra-speed and breaking resetting part comprises an emergency breaking device and an emergency breaking accelerator. The utility model is characterized in that the turbine oil safety protection system also comprises an ultra-speed protection oil part which is divided into two paths, and the two paths can respectively form a safety oil circuit and an ultra-speed protection oil circuit via two difference throttling holes. The safety oil circuit part comprises four stop electromagnetic valves and one emergency breaking accelerator, the four stop electromagnetic valves are connected with an oil returning device after serial and parallel connection; the ultra-speed protection oil part comprises two ultra-speed protection oil electromagnetic valves which are connected with the oil returning device after parallel connection. The utility model increases the online test function of the system, improves load shedding safety performance of units and increases the reliability of the turbine oil safety protection system, and the adopted turbine oil can not pollute environment.
Description
(1) technical field
The utility model relates to the low pressure turbine oil security system of steam turbine.
(2) background technique
In the steam turbine low-pressure turbine oil security system of the prior art; as no OPC oil (overspeed protection oil) in the 125MW unit; an OPC solenoid valve is housed on every oil engine; if an OPC solenoid valve is arranged like this is failure to actuate; then the valve of corresponding this electromagnetic valve just is failure to actuate, thereby influences the removal of load performance of unit.
(3) summary of the invention
The purpose of this utility model is to provide a kind of steam turbine low-pressure turbine oil security system, and this security system has increased the online test function of system, has improved the removal of load Safety performance and the reliability that has improved the low pressure turbine oil security system of unit.
The utility model is achieved in that a kind of steam turbine low-pressure turbine oil security system; comprise safe oil circuit part; mechanical overspeed protection control and the blocking part that resets; mechanical overspeed protection control and blocking reset portion branch comprise emergency governor, overspeed governor and emergency governor pilot valve; emergency governor pilot valve is by the dish valve; the oily piston of safety; blocking is formed with reseting handle; it is characterized in that described turbine oil security system also comprises overspeed protection oil part; turbine oil is divided into two-way; form safe oil circuit and overspeed protection oil circuit through two different throttle orifices respectively; safe oil circuit partly comprises four shutdown solenoid valves and an emergency governor pilot valve; four shutdown solenoid valves connect the back to oil return with series parallel connection; overspeed protection oil part comprises two overspeed protection solenoids, and two overspeed protection solenoids are connected in parallel the back to oil return.
Above-mentioned steam turbine low-pressure turbine oil security system, described mechanical overspeed protection control and blocking reset and partly also comprise the remote control resetting means, the remote control resetting means is made up of reset solenoid valve and cylinder, the electromagnetic valve that resets cylinder intake, cylinder is loaded on the support, the connecting rod of cylinder piston end be fixed in the blocking contact with the lever of reseting handle.
The utility model is on existing safe oil circuit and mechanical overspeed protection control and blocking reset the basis of part; the safety oil circuit is improved; increase the remote control solenoid valve that resets of usefulness that resets, and increased overspeed protection oil part, improved unit removal of load Safety performance.The steam turbine low-pressure turbine oil is through throttle orifice and safe oil-overflow valve, formed the required safety oil of system, security system is finished the function of putting steam turbine and emergency shutdown again, and is finished the online test function of main halt condition by the control to safety oil then; Turbine pressure oil forms overspeed protection oil through throttle orifice, then by the control to overspeed protection oil, finishes the overspeed protection function of steam turbine.The utility model has increased the online test function of system, has improved the removal of load Safety performance and the reliability that has improved the low pressure turbine oil security system of unit, and the turbine oil environmentally safe that adopts.
(4) description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the utility model low pressure turbine oil security system structural representation.
Among the figure: 1 the one AST (safety oil) solenoid valve, 2 the 2nd AST solenoid valves, 3 the 3rd AST solenoid valves; 4 the 4th AST solenoid valves, 5 safe oil-overflow valves, 6 the one OPC (overspeed protection oil) solenoid valve; 7 the 2nd OPC solenoid valves, the oily piston of 8 safety, 9 dish valves; 10 blocking and reseting handles; 11 emergency governor, overspeed governors, 12 cylinders, 13 solenoid valves that reset; 14 oil returns, 15 pressure oils (turbine pressure oil).
(5) embodiment
Referring to Fig. 1, a kind of steam turbine low-pressure turbine oil security system comprises safe oil circuit part, overspeed protection oil part, mechanical overspeed protection control and the blocking part that resets.The low pressure turbine oil security system be with turbine oil as work with oil, oil sources is that the lubricating oil system by steam turbine provides, promptly it is stood with the shared oil of lubricating oil system.Turbine oil by lubricating oil system provides is divided into two-way, forms AST oil (safety oil) and OPC oil (overspeed protection oil) through two different throttle orifices respectively.
One road turbine oil 15 forms AST oil by throttle orifice, controls the safety oil pressure to system's setting valve through safe oil-overflow valve 5 again, thereby satisfies the requirement of system to safety oil.On the safety oil circuit; four AST (shutdown) solenoid valves and an emergency governor pilot valve also are installed, when four AST (shutdown) solenoid valves or emergency governor pilot valve action, then by oil return 14 pipeline venting safety oil; make the main inlet throttle-stop valve and the pitch Close All of steam turbine, thereby steam turbine is shut down.Four AST (shutdown) solenoid valve the 1,2,3, the 4th links together in series-parallel mode, all stopping signals of steam turbine (except that shut down on the spot and mechanical overspeed protection control) all pass through shutdown function that this four AST (shutdown) solenoid valve is finished steam turbine.Because four AST (shutdown) solenoid valve connects in series-parallel mode, so can finish stopping signal at thread test, promptly an AST solenoid valve 1 and the 2nd AST solenoid valve 2 are a passage, the 3rd AST solenoid valve 3 and the 4th AST solenoid valve 4 are two passages, when a passage when doing experiment, two passages can guarantee that steam turbine normally moves; Same, when two passages when doing experiment, a passage can guarantee that also steam turbine normally moves, and if require this moment steam turbine to shut down, AST (shutdown) solenoid valve also can proper functioning so, makes the shutdown of steam turbine safety.
Mechanical overspeed protection control and blocking reset portion branch comprise emergency governor, overspeed governor 11, emergency governor pilot valve and remote control resetting means, emergency governor pilot valve is made up of dish valve 9, the oily piston 8 of safety, blocking and reseting handle 10, and the remote control resetting means is made up of reset solenoid valve 13 and cylinder 12.Emergency governor pilot valve be used for shutting down on the spot, mechanical overspeed protection control and putting again on the spot, and can do mechanical overspeed protection control at thread test.The function of emergency governor pilot valve is 110% of turbine speed overrate～120% o'clock, can close all steam inlet valves of steam turbine by the safety oil in the oil return 14 pipeline venting security systems, cuts off the flow that all enter steam turbine.Solenoid valve 13 control cylinders 12 air inlets that reset in the remote control resetting means, cylinder 12 is loaded on the support, the connecting rod of cylinder 12 piston ends be fixed in the blocking contact with the lever of reseting handle 10.
Another road turbine oil 15 forms OPC oil by throttle orifice, i.e. overspeed protection oil, and when steam turbine exceeds the speed limit 103% the time, an OPC solenoid valve 6 and 7 actions of the 2nd OPC solenoid valve by oil return 14 pipeline venting OPC oil, close all pitch of steam turbine, thus the protection steam turbine.
Claims (2)
1. steam turbine low-pressure turbine oil security system; comprise safe oil circuit part; mechanical overspeed protection control and the blocking part that resets; mechanical overspeed protection control and blocking reset portion branch comprise emergency governor, overspeed governor and emergency governor pilot valve; emergency governor pilot valve is by the dish valve; the oily piston of safety; blocking is formed with reseting handle; it is characterized in that described turbine oil security system also comprises overspeed protection oil part; turbine oil is divided into two-way; form safe oil circuit and overspeed protection oil circuit through two different throttle orifices respectively; safe oil circuit partly comprises four shutdown solenoid valves and an emergency governor pilot valve; four shutdown solenoid valves connect the back to oil return with series parallel connection; overspeed protection oil part comprises two overspeed protection solenoids, and two overspeed protection solenoids are connected in parallel the back to oil return.
2. steam turbine low-pressure turbine oil security system according to claim 1, it is characterized in that mechanical overspeed protection control and the blocking part that resets also comprises the remote control resetting means, the remote control resetting means is made up of reset solenoid valve and cylinder, the electromagnetic valve that resets cylinder intake, cylinder is loaded on the support, the connecting rod of cylinder piston end be fixed in the blocking contact with the lever of reseting handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520040582 CN2818791Y (en) | 2005-03-31 | 2005-03-31 | Low-pressure turbine oil safe system of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520040582 CN2818791Y (en) | 2005-03-31 | 2005-03-31 | Low-pressure turbine oil safe system of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2818791Y true CN2818791Y (en) | 2006-09-20 |
Family
ID=37004845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520040582 Expired - Lifetime CN2818791Y (en) | 2005-03-31 | 2005-03-31 | Low-pressure turbine oil safe system of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2818791Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476987B (en) * | 2009-01-19 | 2011-04-20 | 沈阳化工学院 | Fault diagnosis method for turbine emergency protection device |
| CN104033192A (en) * | 2014-06-13 | 2014-09-10 | 哈尔滨汽轮机厂有限责任公司 | Second or first rotation speed and jumping protective device for steam turbine |
| CN109083701A (en) * | 2018-08-04 | 2018-12-25 | 大唐国际发电股份有限公司张家口发电厂 | A kind of feed pump turbine emergency governor test isolation resetting apparatus |
| CN112648021A (en) * | 2020-11-30 | 2021-04-13 | 华电电力科学研究院有限公司 | Steam turbine AST electromagnetic valve activity test device and online maintenance and transformation method thereof |
-
2005
- 2005-03-31 CN CN 200520040582 patent/CN2818791Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476987B (en) * | 2009-01-19 | 2011-04-20 | 沈阳化工学院 | Fault diagnosis method for turbine emergency protection device |
| CN104033192A (en) * | 2014-06-13 | 2014-09-10 | 哈尔滨汽轮机厂有限责任公司 | Second or first rotation speed and jumping protective device for steam turbine |
| CN109083701A (en) * | 2018-08-04 | 2018-12-25 | 大唐国际发电股份有限公司张家口发电厂 | A kind of feed pump turbine emergency governor test isolation resetting apparatus |
| CN112648021A (en) * | 2020-11-30 | 2021-04-13 | 华电电力科学研究院有限公司 | Steam turbine AST electromagnetic valve activity test device and online maintenance and transformation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI ELECTRIC POWER STATION EQUIPMENT CO. Free format text: FORMER OWNER: SHANGHAI TURBINE CO., LTD. Effective date: 20080509 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080509 Address after: No. 188, Chun Chun Road, Shanghai, Minhang: 201100 Patentee after: Shanghai Electric Station Equipment Co., Ltd. Address before: No. 333, Jiangchuan Road, Shanghai, Minhang District: 200240 Patentee before: Shanghai Steam Turbine Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150331 Granted publication date: 20060920 |