CN205422854U - Automatic protective device of gear barring system - Google Patents
Automatic protective device of gear barring system Download PDFInfo
- Publication number
- CN205422854U CN205422854U CN201520987281.4U CN201520987281U CN205422854U CN 205422854 U CN205422854 U CN 205422854U CN 201520987281 U CN201520987281 U CN 201520987281U CN 205422854 U CN205422854 U CN 205422854U
- Authority
- CN
- China
- Prior art keywords
- barring
- valve
- jiggering
- lubricating pipe
- electromagnetic valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Control Of Turbines (AREA)
Abstract
The utility model provides an automatic protective device of gear barring system, includes steam turbine barring balance, and steam turbine barring balance links to each other with hydraulic actuator, and hydraulic actuator links to each other through lubricating pipe (5) with barring solenoid valve (4), and barring solenoid valve (4) link to each other through lubricating pipe (5) with this patent unloading valve (2), and pressure measurement station Q (3) is located the lubricating pipe between unloading valve (2) and barring electronic valve (4), unloading valve (2) link to each other with this patent three -position four -way valve (1) respectively, three -position four -way valve (1) links to each other with lubricating pipe (5), oil tank, unloading valve (2) respectively. The beneficial effects of the utility model are that consider equipment current situation and safe redundancy, increasing artificial intervention point function in logic automatic, avoid automatic start or the unusual electrification of solenoid valve under the barring abnormal conditions, protect the safety of turbine unit shafting.
Description
Technical field:
This utility model relates to rolling gear of turbine, is specifically related to the security system of a kind of automatic gear barring gear.
Background technology:
In steam-turbine unit stopping process; unit temperature declines; owing to cylinder and rotor upper and lower part inhomogeneous cooling are even; rotor is after stopping operating; bending will be produced; reset steam turbine in the case of so and be easy to cause sound part grazing, the vibration beyond allowed band occurs, time serious, even damages unit.In order to avoid the generation of this accident, steam turbine is configured with barring mechanism, rotor can be made to be rotated further, uniformly cool down when barring mechanism is devoted oneself to work, thus can prevent rotor from producing thermal flexure.
Auto-barring operation device, can realize manually and automatically jiggering.Programmable controller PLC is utilized to carry out logic control.And can lubrication pressure less than certain definite value time and jiggering electric current excessive in the case of be automatically stopped jiggering.
The startup permissive condition of automatic barring gear is: barring gear switch board receives that lubrication pressure is normal, steam turbine zero-turn speed press contact useful signal, has both met the outside jiggering condition that allows, and otherwise switch board will refusal boot disk vehicle motor.
Start under permissive condition meeting jiggering, after selecting auto-barring mode, as long as TSI sends zero tach signal to jiggering switch board, turn on automatically electromagnetic valve, make hydraulic actuating mechanism engage with Turbine Barring Gears gear.At solenoid valves, jiggering switch board PLC starts to detect whether that engagement puts in place signal after 30 seconds, put in place signal if not receiving engagement, and crawl is started by turning motor, the engagement being beneficial between gear.If receiving engagement to put in place signal, turning motor will start automatically.After motor runs 5 seconds simultaneously, electromagnetic valve will automatically power off.If not receiving engagement to put in place signal, after turning motor crawl twice, third time will start jiggering by force.Whenever press " car of stopping quotation on the exchange " button, by stop disc vehicle motor.Stop quotation on the exchange car button engagement put in place effective in the case of be an alternative expression switch, during to prevent jiggering button from unclamping, due to do not throw away or engage put in place signal yet suffer from the case of boot disk vehicle motor automatically again.
The reliability of cranking system and automated manner and zero tach signal have much relations, once meet any condition of automatically engaging, and jiggering all can automatically start or electromagnetic valve is the most charged, inadequate from the safety of the design system redundancy that comes up.Additionally there are some deviations in design concept.Cranking system is not the system particularly harsh to making time requirement.Automatic degree is required do not have other system requirement the strictest.And the most on-the-spot use habit is artificial judgment condition, manually engages, manually boots the step of motor.And the reliability aspect of field apparatus often has difference.Such as if it occur that electromagnetic valve bite, under automated manner, being manually engaged, engagement signal once meets, and jiggering will start immediately.There is personal injury risk.
Summary of the invention:
The shortcoming that the purpose of this utility model is the above-mentioned prior art of customer service, it is provided that the protective device that a kind of gear jiggering automatically engages, it is to avoid automatically start under jiggering abnormal conditions or electromagnetic valve is abnormal charged, the safety of protection Balancing of Steam Turbine Shaft.
The purpose of this utility model is to solve the problems referred to above by the following technical programs.
A kind of protective device of automatic gear cranking system, it is characterized in that: include Turbine Barring Gears escapement, Turbine Barring Gears escapement is connected with hydraulic actuating mechanism, hydraulic actuating mechanism is connected by lubricating pipe with jiggering electromagnetic valve, jiggering electromagnetic valve is connected by lubricating pipe with unloader, on pressure-measuring-point Q lubricating pipe between unloader and jiggering electromagnetic valve；Unloader is connected with three-position four-way valve respectively；Three-position four-way valve is connected with lubricating pipe, fuel tank, unloader respectively.
The purpose of this utility model is the redundancy in view of equipment actuality and safety; increasing manual intervention point function the most in logic; after clicking on " startup "; after lubrication pressure Q point is normal; jiggering could be started; avoid automatic startup or electromagnetic valve under jiggering abnormal conditions abnormal the most charged, the safety of protection Balancing of Steam Turbine Shaft.
Consider the factor of safety, once throw operating mode away, it should the car and forbid being again started up of unconditionally stopping quotation on the exchange.Automatic condition is avoided to be again started up causing jiggering wobble gear to collide with big shaft gear after meeting.
Improved though: 1) automated manner is non-whole-process automatic, increases a way solenoid valve and unloading valve design, and jiggering " is thrown away " after signal arrives, and needs artificial " startup ", and otherwise cranking system cannot normally put into.2) entry condition judgement, jiggering engagement, display lamp d display function are automatically simply completed.These functions remain original design.
Accompanying drawing illustrates:
Fig. 1 is automatic gear barring gear security system schematic diagram.
Wherein: 1, three-position four-way valve；2, unloader；3, choke valve；4 pressure-measuring-point Q；5, lubricating pipe；6, jiggering electromagnetic valve；7, hydraulic jack；8, handle is manually put into；9, wobble gear；10, turbine rotor；11, electromagnetic valve A；12, electromagnetic valve B.
Detailed description of the invention:
It is original design after jiggering electromagnetic valve 6 instruction sends, jiggering electromagnetic valve 6 turns on lubricating oil to piston right chamber, hydraulic jack 7 is promoted to move to the left, the gear promoting wobble gear 9 and turbine rotor 10 is collided, if the not up to position of engagement, soft starting device drives turning motor crawl, until engagement signal arrives.Turning motor instantaneous starting, after stablizing 3 seconds, electromagnetic valve dead electricity.
After optimization, plus road unloader 2 device before jiggering electromagnetic valve, unloader is controlled by three-position four-way valve 1: in the case of electromagnetic valve A (11) is charged, cut off conducting lubricating oil to unloader 2 epicoele fuel feeding, unloader 2 not emptying, lubricating oil can be switched to jiggering electromagnetic valve 6, it is ensured that cranking system normally works.After electromagnetic valve A (11) dead electricity, maintain unloader 2 position, it is ensured that cranking system normally works；After electromagnetic valve B (12) is charged, unloader 2 epicoele oil unloads to grease-box, and unloader 2 starts emptying, fuel feeding no pressure before lubricating oil to jiggering electromagnetic valve 6, and cranking system cannot normally put into.
Newly-increased pressure-measuring-point Q (4), sampling is connected between unloader 2 and jiggering electromagnetic valve 6, normally opened design, pressure > 0.035Mpa action, this measuring point can substitute " lubrication pressure is normal " measuring point function, admittedly need not former PLC is carried out any logic Modification, directly replace former " lubrication pressure is normal " point position.In the case of jiggering automated manner or manual mode condition meet, normal with upward pressure measuring point Q (4), ability boot disk vehicle motor, avoid auto-programming automatic boot disk vehicle motor simultaneously.Barring gear operation card needs to increase " startup " button.After click, electromagnetic valve A (11) is charged, and conducting lubricating oil is to jiggering electromagnetic valve 6, it is ensured that cranking system fuel feeding is normal.After pressure-measuring-point Q (4) detects that pressure is normal, time delay 10 seconds, electromagnetic valve A (11) dead electricity.Three-position four-way valve 1 can maintain in situ, it is ensured that unloader 2 not emptying, it is ensured that cranking system normally works.
Once throwing away or jiggering trip behavior, electromagnetic valve B (12) is automatic dead electricity after charged 10 seconds, it is ensured that lubricating oil reliably cuts off.Hereafter instant jiggering electromagnetic valve 6 is the most charged, it is possible to ensure that wobble gear 9 cannot swing.
The beneficial effects of the utility model allow for the redundancy of equipment actuality and safety; increasing manual intervention point function the most in logic; after clicking on " startup "; after lubricating oil pressure measuring point Q (4) point is normal; jiggering could be started; avoid automatic startup or jiggering electromagnetic valve (6) under jiggering abnormal conditions abnormal the most charged, the safety of protection Balancing of Steam Turbine Shaft.Former logic there is not any amendment, it is not necessary to PLC is carried out any operation, it is only necessary to being connected to two way solenoid valve rigid lines control part, Reconstruction in field workload is little simultaneously.
The above; it is only this utility model preferably detailed description of the invention; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; change can be readily occurred in or replace, all should contain at protection domain of the present utility model.
Claims (1)
1. the protective device of an automatic gear cranking system, it is characterized in that: include Turbine Barring Gears escapement, Turbine Barring Gears escapement is connected with hydraulic actuating mechanism, hydraulic actuating mechanism is connected by lubricating pipe (5) with jiggering electromagnetic valve (6), jiggering electromagnetic valve (6) is connected by lubricating pipe (5) with unloader (2), and pressure-measuring-point Q (4) is positioned on the lubricating pipe between unloader (2) and jiggering electromagnetic valve (6)；Unloader (2) is connected with three-position four-way valve (1)；Three-position four-way valve (1) is connected with lubricating pipe (5), fuel tank, unloader (2) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520987281.4U CN205422854U (en) | 2015-12-03 | 2015-12-03 | Automatic protective device of gear barring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520987281.4U CN205422854U (en) | 2015-12-03 | 2015-12-03 | Automatic protective device of gear barring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205422854U true CN205422854U (en) | 2016-08-03 |
Family
ID=56535824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520987281.4U Expired - Fee Related CN205422854U (en) | 2015-12-03 | 2015-12-03 | Automatic protective device of gear barring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205422854U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661729A (en) * | 2017-03-31 | 2018-10-16 | 上海梅山钢铁股份有限公司 | It is provided with the hydraulic turning gear control loop of failure protecting device |
-
2015
- 2015-12-03 CN CN201520987281.4U patent/CN205422854U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661729A (en) * | 2017-03-31 | 2018-10-16 | 上海梅山钢铁股份有限公司 | It is provided with the hydraulic turning gear control loop of failure protecting device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20181203 |