CN103161519A - Control method of high position lubricating oil tank of turbine main shaft - Google Patents
Control method of high position lubricating oil tank of turbine main shaft Download PDFInfo
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- CN103161519A CN103161519A CN 201110411460 CN201110411460A CN103161519A CN 103161519 A CN103161519 A CN 103161519A CN 201110411460 CN201110411460 CN 201110411460 CN 201110411460 A CN201110411460 A CN 201110411460A CN 103161519 A CN103161519 A CN 103161519A
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Abstract
Provided is a control method of a high position lubricating oil tank of a turbine main shaft. An electromagnetic valve which can be closed with power is chosen in an electromagnetic valve on an outlet of the high position lubricating oil tank. Joint control of rotating speed signals of a turbine and the pressure of a lubricating oil main pipe is achieved, if the probability of tile burning exists, the electromagnetic valve on the outlet of the high position lubricating oil tank is enabled to lose power, the electromagnetic valve on the outlet of the high position lubricating oil tank is opened due to the loss of power, and lubricating oil supplies the lubricating oil to the main shaft depending on the static pressure of the lubricating oil. Meanwhile, tripping orders of the turbine are sent, and the high position lubricating oil tank of the turbine main shaft is suitable for manufacturing a novel turbine auxiliary control system.
Description
Technical field
The present invention relates to a kind of controlling method, especially the high-order lubricating oil tank controlling method of steam turbine main shaft.
Background technique
At present, steam turbine of thermal power plant is in actual motion, there is the hidden danger of lubricant oil cutout, according to present design, the lubricant oil main oil pump is supplying lubricating oil when steam turbine operation, the entrance of main oil pump is at lubricating oil tank, and the lubricant oil that 1 to 3 kilogram of pressure is supplied with in outlet has played the effect of lubrication macro-axis and bearing shell.The high-order lubricating oil tank of a kind of steam turbine main shaft, it drives a by-pass pipe in the main oil pump outlet, by-pass pipe is communicated to and is arranged in steam turbine main shaft top, higher than a top petrol tank on the height of 12 to 30 meters of macro-axis, the top petrol tank spill pipe connects lubricating oil tank, the top petrol tank entrance is established solenoid valve.If just in case main oil pump can't provide lubricant oil when steam turbine operation, the lubricant oil that is stored on top petrol tank relies on the static pressure of self to provide lubricant oil to macro-axis, prevent because main oil pump is inhaled the various reasons such as empty, the situation of lubricant oil oil-break in service occurs sometimes, the heavy losses that cause tile kilning, ruin axle.But, also do not have ready-made method to go to control it.The present invention proposes exactly and addresses this problem.
Summary of the invention
Solved because main oil pump is inhaled the various reasons such as empty in order to overcome the high-order lubricating oil tank of steam turbine main shaft, the situation of lubricant oil oil-break in service occurs sometimes, cause tile kilning, ruin the hidden danger of the heavy losses of axle, but, also do not have ready-made method to go to control its deficiency, the invention provides the high-order lubricating oil tank controlling method of a kind of steam turbine main shaft.
The technical solution adopted for the present invention to solve the technical problems is: high-order lubricating oil tank outlet solenoid valve selects charged solenoid valve of cutting out, be subjected to the co-controlling of turbine speed signal and lubricant oil main pipe pressure, these two signals are respectively: turbine speed is greater than 5% rated speed, the lubricant oil main pipe pressure is extremely low, two signal phases with after, export a switching value, make high-order lubricating oil tank export the solenoid valve dead electricity, simultaneously, send the steam turbine trip command.
Perhaps select turbine speed greater than 10% rated speed signal.
For being provided with special oil pump to high-order lubricating oil tank pump oil, be called high-order lubricating pump, described high-order lubricating oil tank is equipped with fluid level transmitter, after the output signal process of fluid level transmitter comprises that the logic of the control system of PLC or DCS judges, the high-order lubricating oil tank liquid level of output expression is lower than the switching value signal of low low value, should hang down the switching value signal of low value in order to start high-order lubricating pump
After the output signal process of fluid level transmitter comprised that the logic of the control system of PLC or DCS judges, the high-order lubricating oil tank liquid level of output expression was higher than the high switching value signal that is worth, and the switching value signal of the high value of this height is in order to stop high-order lubricating pump.
The temperature measuring element that comprises thermal resistor for the high-order lubricating oil tank installing of described outdoor arrangement, the high-order lubricating oil tank installing electric heater of described outdoor arrangement, after the output signal process of thermal resistor comprises that the logic of the control system of PLC or DCS judges, the high-order lubricating oil tank temperature of output expression is lower than the switching value signal of low low value, this temperature lower than the switching value signal of low low value in order to start high-order lubricating oil tank electric heater
After the output signal process of thermal resistor comprises that the logic of the control system of PLC or DCS judges, the high-order lubricating oil tank temperature of output expression is higher than the switching value signal of high value, this temperature higher than the switching value signal of high value in order to stop high-order lubricating oil tank electric heater.
The temperature element that comprises thermal resistance for the high-order grease-box installing of described outdoor arrangement, the high-order grease-box installing steam heater of described outdoor arrangement and the magnetic valve of controlling steam heater, when the output signal of thermal resistance after the logic judgement of the control system that comprises PLC or DCS, the high-order grease-box temperature of output expression is lower than the switching value signal of low low value, this temperature is controlled the magnetic valve of high-order grease-box steam heater lower than the switching value signal of low low value in order to starting
After the output signal process of thermal resistor comprises that the logic of the control system of PLC or DCS judges, the high-order lubricating oil tank temperature of output expression is higher than the switching value signal of high value, this temperature higher than the switching value signal of high value in order to stop controlling the solenoid valve of high-order lubricating oil tank steam heater.
Its working principle is: turbine speed is greater than 5% rated speed, the lubricant oil main pipe pressure is extremely low, two signal phases with after, export a switching value, show in steam turbine operation the lubricating oil pressure forfeiture, the possibility that tile kilning is arranged, make high-order lubricating oil tank outlet solenoid valve dead electricity, high-order lubricating oil tank outlet solenoid valve is opened because of coil losing electricity, and lubricant oil relies on the static pressure of self to provide lubricant oil to macro-axis, simultaneously, send the steam turbine trip command.
The invention has the beneficial effects as follows: first, prior art, if just in case main oil pump can't provide lubricant oil when steam turbine operation, the lubricant oil that is stored on top petrol tank relies on the static pressure of self to provide lubricant oil to macro-axis, prevent because main oil pump is inhaled the various reasons such as empty, the situation of lubricant oil oil-break in service occurs sometimes, the heavy losses that cause tile kilning, ruin axle, the invention provides a kind of controlling method, prevent because main oil pump is inhaled the various reasons such as empty, the situation of lubricant oil oil-break in service occurs sometimes, the heavy losses that cause tile kilning, ruin axle.The second, prior art does not have ready-made controlling method for high-order lubricating pump, high-order lubricating oil tank liquid level and temperature, and the invention provides the controlling method for high-order lubricating pump, high-order lubricating oil tank liquid level and temperature.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Accompanying drawing is embodiment one schematic diagram.
In figure, 1.1 solenoid valves select charged solenoid valve of cutting out, and 2. turbine speed is greater than 5% rated speed, and 3. the lubricant oil main pipe pressure is extremely low, 4. the steam turbine trip command.
Embodiment
In the accompanying drawings, turbine speed greater than 5% rated speed (2) with extremely low (3) the two signal phases of lubricant oil main pipe pressure with, if logic is set up, solenoid valve selects charged solenoid valve of cutting out (1) coil losing electricity, high-order lubricating oil tank outlet solenoid valve is opened because of coil losing electricity, simultaneously, send steam turbine trip command (4).
In second embodiment, the rotating speed among embodiment one changes into greater than 5% rated speed signal selects turbine speed greater than 10% rated speed signal.
In the 3rd embodiment, for being provided with special oil pump to high-order lubricating oil tank pump oil, be called high-order lubricating pump, described high-order lubricating oil tank is equipped with 4-20mA output, range 0-1000mm, magnetic float liquid level transmitter.After the logic judgement through the control system of DCS of the output signal of fluid level transmitter, the high-order lubricating oil tank liquid level of output expression is lower than the switching value signal of low low value 300mm, and the switching value signal of this low value is in order to starting high-order lubricating pump,
After the logic judgement of output signal through the control system of DCS of fluid level transmitter, the high-order lubricating oil tank liquid level of output expression is higher than the 900mm switching value signal of high value, and the switching value signal of the high value of this height is in order to stop high-order lubricating pump.
In the 4th embodiment, install the temperature measuring element of pt100 thermal resistor for the high-order lubricating oil tank of described outdoor arrangement, the high-order lubricating oil tank installing electric heater of described outdoor arrangement, after the logic judgement of output signal through the PLC control system of thermal resistor, the high-order lubricating oil tank temperature of output expression is lower than the switching value signal of 10 degrees centigrade of low low values, this temperature lower than the switching value signal of low low value in order to start high-order lubricating oil tank electric heater
After the logic judgement through the PLC control system of the output signal of thermal resistor, the high-order lubricating oil tank temperature of output expression is higher than the switching value signal of 45 degrees centigrade of high values, this temperature higher than the switching value signal of high value in order to stop high-order lubricating oil tank electric heater.
Claims (5)
1. the high-order lubricating oil tank controlling method of a steam turbine main shaft, it is characterized in that: high-order lubricating oil tank outlet solenoid valve selects charged solenoid valve of cutting out, be subjected to the co-controlling of turbine speed signal and lubricant oil main pipe pressure, these two signals are respectively: turbine speed is greater than 5% rated speed, and the lubricant oil main pipe pressure is extremely low, two signal phases with after, export a switching value, make high-order lubricating oil tank outlet solenoid valve dead electricity, simultaneously, send the steam turbine trip command.
2. the high-order lubricating oil tank controlling method of steam turbine main shaft according to claim 1, is characterized in that: select turbine speed greater than 10% rated speed signal.
3. the high-order grease-box control method of steam turbine main shaft according to claim 1, it is characterized in that: for being provided with special oil pump to high-order grease-box pump oil, be called high-order grease pump, described high-order grease-box is equipped with fluid level transmitter, when the output signal of fluid level transmitter after the logic judgement of the control system that comprises PLC or DCS, the high-order grease-box liquid level of output expression is lower than the switching value signal of low low value, should hang down the switching value signal of low value in order to start high-order grease pump
After the output signal process of fluid level transmitter comprised that the logic of the control system of PLC or DCS judges, the high-order lubricating oil tank liquid level of output expression was higher than the high switching value signal that is worth, and the switching value signal of the high value of this height is in order to stop high-order lubricating pump.
4. the high-order grease-box control method of steam turbine main shaft according to claim 1, it is characterized in that: the high-order grease-box installing of described outdoor arrangement comprises the temperature element of thermal resistance, the high-order grease-box installing electric heater of described outdoor arrangement, when the output signal of thermal resistance after the logic judgement of the control system that comprises PLC or DCS, the high-order grease-box temperature of output expression is lower than the switching value signal of low low value, this temperature lower than the switching value signal of low low value in order to start high-order grease-box electric heater
After the output signal process of thermal resistor comprises that the logic of the control system of PLC or DCS judges, the high-order lubricating oil tank temperature of output expression is higher than the switching value signal of high value, this temperature higher than the switching value signal of high value in order to stop high-order lubricating oil tank electric heater.
5. the high-order lubricating oil tank controlling method of steam turbine main shaft according to claim 1, it is characterized in that: the high-order lubricating oil tank installing of described outdoor arrangement comprises the temperature measuring element of thermal resistor, the high-order lubricating oil tank installing steam heater of described outdoor arrangement and the solenoid valve of controlling steam heater, after the output signal process of thermal resistor comprises that the logic of the control system of PLC or DCS judges, the high-order lubricating oil tank temperature of output expression is lower than the switching value signal of low low value, this temperature is controlled the solenoid valve of high-order lubricating oil tank steam heater lower than the switching value signal of low low value in order to starting,
After the output signal process of thermal resistor comprises that the logic of the control system of PLC or DCS judges, the high-order lubricating oil tank temperature of output expression is higher than the switching value signal of high value, this temperature higher than the switching value signal of high value in order to stop controlling the solenoid valve of high-order lubricating oil tank steam heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110411460 CN103161519A (en) | 2011-12-12 | 2011-12-12 | Control method of high position lubricating oil tank of turbine main shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110411460 CN103161519A (en) | 2011-12-12 | 2011-12-12 | Control method of high position lubricating oil tank of turbine main shaft |
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| CN103161519A true CN103161519A (en) | 2013-06-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112955631A (en) * | 2018-09-19 | 2021-06-11 | 沙特阿拉伯石油公司 | Turbine lubrication system with gravity feed transfer case |
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2011
- 2011-12-12 CN CN 201110411460 patent/CN103161519A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112955631A (en) * | 2018-09-19 | 2021-06-11 | 沙特阿拉伯石油公司 | Turbine lubrication system with gravity feed transfer case |
| US11834972B2 (en) | 2018-09-19 | 2023-12-05 | Saudi Arabian Oil Company | Turbomachinery lubrication system improvement gravity rundown tanks |
| CN112955631B (en) * | 2018-09-19 | 2024-03-12 | 沙特阿拉伯石油公司 | Turbine lubrication system with gravity self-circulation box |
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Application publication date: 20130619 |