CN212508449U - Oil cylinder structure of speed-regulating valve oil motor of steam turbine generator - Google Patents
Oil cylinder structure of speed-regulating valve oil motor of steam turbine generator Download PDFInfo
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- CN212508449U CN212508449U CN202021209870.7U CN202021209870U CN212508449U CN 212508449 U CN212508449 U CN 212508449U CN 202021209870 U CN202021209870 U CN 202021209870U CN 212508449 U CN212508449 U CN 212508449U
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Abstract
The utility model belongs to the technical field of industry turbo generator equipment and specifically relates to a thereby turbo generator speed governing valve servomotor oil cylinder structure of effective discharge epicoele air elimination air-resistor influence includes servomotor hydro-cylinder, be provided with the piston in the servomotor hydro-cylinder, the piston divide into jar and lower jar with the inner chamber of servomotor hydro-cylinder, wherein goes up between jar and the lower jar by the piston isolated, including the blast pipe, blast pipe one end and last jar top intercommunication, the other end and the control oil system oil tank intercommunication of blast pipe. According to the invention, the exhaust pipe is ingeniously added, wherein one end of the exhaust pipe is communicated with the upper cylinder, and the other end of the exhaust pipe is communicated with the oil tank of the control oil system, so that when the hydraulic control system is in actual use, once air resistance influences the use, air in the upper cavity can be conveniently discharged through the exhaust pipe, and therefore, the faults that the piston rods of the upper oil cylinder and the lower oil cylinder of the servomotor cannot move and the speed regulation valve cannot be opened and closed are eliminated. The utility model discloses be particularly useful for among the turbo generator speed governing valve servomotor.
Description
Technical Field
The utility model belongs to the technical field of industry turbo generator equipment and specifically relates to a turbo generator speed governing valve servomotor hydro-cylinder structure.
Background
A steam turbine is a rotary power machine that converts the energy of steam into mechanical work, and is one of the main devices of a steam power plant. For equipment adopting a DEH digital electro-hydraulic control system, two sets of oil supply systems are generally configured, wherein one set of the oil supply systems is a high-pressure anti-wear oil system and provides control oil and high-pressure safety oil of an actuating mechanism for a main valve, a regulating valve and a rotary partition plate, the working medium of the oil supply systems is anti-wear oil, and the working oil pressure is 14.5 MPa. The other set of low-pressure turbine oil system is supplied to a main oil pump directly driven by a main shaft of the steam turbine, the working medium is low-pressure turbine oil, the oil pressure is about 0.98MPa, lubricating oil is mainly provided for the unit through an oil injector, and the lubricating oil forms low-pressure safety oil through a throttling hole and is used for mechanical hydraulic protection. The turbonator is equipped with medium-pressure and low-pressure (steam-supplementing) main steam valves and speed-regulating steam valves, the main steam valve is used for quickly closing when the protection action is implemented, and cutting off main steam from entering cylinder, and the regulation steam valve is used for changing main steam flow entering cylinder according to the instruction of speed-regulating (DEH) system so as to attain the goal of regulating load of machine set. Generally, after the grid connection with load is started from the unit rush, the steam flow is regulated by using a speed regulating valve. The main air valve is arranged on the main steam main pipe, and the speed regulation air valve is arranged on the cylinder body and is close to the front cylinder.
In actual use, the reason for the formation of the air resistance of the oil cylinder of the speed-regulating valve oil motor of the steam turbine generator is as follows: the speed regulating valve control principle is that the oil cylinder of the valve regulating oil-driven machine is divided into an upper cylinder and a lower cylinder, the lower cylinder of the oil-driven machine is communicated with a servo valve and high-pressure oil P, the upper cylinder of the oil-driven machine is communicated with a pressure return oil DR, oil inlet or oil drainage of the lower cylinder of the oil-driven machine is controlled by the servo valve, and the servo valve receives an instruction of a speed regulating (DEH) system to drive an electric signal to control the oil inlet or oil drainage quantity of the servo valve. When the lower cylinder of the servomotor receives a servo valve signal to open the valve and feed oil, the speed regulating valve is opened, the reset spring arranged on the upper part of the speed regulating valve is pressed, and when the lower cylinder of the servomotor receives a servo valve signal to close the valve and drain oil, the speed regulating valve closes the valve under the action of the restoring force of the upper spring. During the operation of the unit, the medium-pressure speed regulation valve has abnormal conditions: when the command of a speed regulation (DEH) system is changed, the opening of a speed regulation valve is not changed along with the change, and a switch does not act. The reason for analysis is that as the upper oil cylinder and the lower oil cylinder of the servomotor are not tight, when the lower oil cylinder is filled with oil, the piston rod is deduced to cause the upper cavity to enter a small amount of air bubbles, when the servomotor is repeatedly opened and closed for a period of time, the air in the upper cavity of the servomotor is accumulated to a certain degree to form air resistance, and when the upper oil cylinder and the air resistance are equal to the lower oil cylinder, the piston rods of the upper oil cylinder and the lower oil cylinder of the servomotor cannot move, and the speed regulating valve cannot be opened and closed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a thereby effective exhaust goes up interior intracavity air and eliminates turbo generator speed governing valve servomotor hydro-cylinder structure of air-resistor influence is provided.
The utility model provides a technical scheme that its technical problem adopted is: turbo generator speed governing valve servomotor hydro-cylinder structure, including the servomotor hydro-cylinder, be provided with the piston in the servomotor hydro-cylinder, the piston divide into jar and lower jar with the inner chamber of servomotor hydro-cylinder, wherein goes up and is isolated by the piston between jar and the lower jar, including the blast pipe, blast pipe one end and last jar top intercommunication, the other end and the control oil system oil tank intercommunication of blast pipe.
Further, an exhaust pipe control valve is arranged on the exhaust pipe.
Further, the pressure oil return pipe is included, and the upper cylinder is communicated with the pressure oil return pipe.
Further, the hydraulic cylinder comprises a high-pressure oil pipe, and the lower cylinder is communicated with the high-pressure oil pipe.
The utility model has the advantages that: aiming at the phenomenon that air in an upper cavity of the servomotor is accumulated to a certain degree to form air resistance after the servomotor is repeatedly switched on and off for a period of time, the invention skillfully adds the exhaust pipe, wherein one end of the exhaust pipe is communicated with the upper cylinder, and the other end of the exhaust pipe is communicated with the oil tank of the control oil system. The utility model discloses be particularly useful for among the turbo generator speed governing valve servomotor.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Labeled as: the hydraulic motor comprises a hydraulic motor cylinder 1, an upper cylinder 2, a lower cylinder 3, an exhaust pipe 4, a high-pressure oil pipe 5 and a pressure oil return pipe 6.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, turbo generator speed governing valve servomotor hydro-cylinder structure, including servomotor hydro-cylinder 1, be provided with piston 7 in the servomotor hydro-cylinder 1, piston 7 divide into 2 and lower jars 3 with the inner chamber of servomotor hydro-cylinder 1, wherein go up and be isolated by piston 7 between 2 and the lower jar 3, including blast pipe 4, 4 one end of blast pipe and 2 top intercommunications of last jar, the other end and the control oil system oil tank intercommunication of blast pipe 4.
The utility model discloses a blast pipe 4 is add at the 2 tops of last jar of servomotor hydro-cylinder 1 very ingenious, blast pipe 4 and control oil system oil tank intercommunication to in time arrange the air resistance that produces along with the non-pressure oil return of oil circuit with the air resistance of the last jar 2 accumulation of servomotor hydro-cylinder 1 to the oil tank of EH control oil system when needs, thereby thoroughly solve because of "go up jar oil pressure + air resistance the piston 7 of servomotor that appears when lower jar oil pressure" can not move, the trouble that the speed governing steam valve can not be opened and closed. In order to flexibly achieve the operation of discharging the air in the upper cylinder 2, an exhaust pipe control valve 8 may be optionally provided in the exhaust pipe 4. The exhaust pipe control valve 8 can lead out air in the upper cylinder 2, so that exhaust operation can be realized efficiently and conveniently. In general, in order to ensure the supply of the oil pressure required for the operation of the oil cylinder of the servomotor, the upper cylinder 2 is preferably communicated with a pressure return pipe 6, and the lower cylinder 3 is preferably communicated with a high-pressure oil pipe 5.
Claims (4)
1. Turbo generator speed governing valve servomotor hydro-cylinder structure, including servomotor hydro-cylinder (1), be provided with piston (7) in servomotor hydro-cylinder (1), piston (7) divide into the inner chamber of servomotor hydro-cylinder (1) and go up jar (2) and lower jar (3), wherein go up jar (2) and lower jar (3) between isolated its characterized in that by piston (7): the device is characterized by comprising an exhaust pipe (4), wherein one end of the exhaust pipe (4) is communicated with the top of an upper cylinder (2), and the other end of the exhaust pipe (4) is communicated with an oil tank of a control oil system.
2. The steam turbine generator speed governing valve servomotor cylinder structure of claim 1, characterized in that: an exhaust pipe control valve (8) is arranged on the exhaust pipe (4).
3. The turbo-generator speed governing valve oil motor cylinder structure of claim 1 or 2, characterized in that: the pressure oil return pipe (6) is included, and the upper cylinder (2) is communicated with the pressure oil return pipe (6).
4. The turbo-generator speed governing valve oil motor cylinder structure of claim 1 or 2, characterized in that: the hydraulic cylinder comprises a high-pressure oil pipe (5), and the lower cylinder (3) is communicated with the high-pressure oil pipe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021209870.7U CN212508449U (en) | 2020-06-28 | 2020-06-28 | Oil cylinder structure of speed-regulating valve oil motor of steam turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021209870.7U CN212508449U (en) | 2020-06-28 | 2020-06-28 | Oil cylinder structure of speed-regulating valve oil motor of steam turbine generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212508449U true CN212508449U (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021209870.7U Active CN212508449U (en) | 2020-06-28 | 2020-06-28 | Oil cylinder structure of speed-regulating valve oil motor of steam turbine generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212508449U (en) |
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2020
- 2020-06-28 CN CN202021209870.7U patent/CN212508449U/en active Active
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