CN216922661U - Control device for inlet rotatable guide vanes of gas compressor - Google Patents
Control device for inlet rotatable guide vanes of gas compressor Download PDFInfo
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- CN216922661U CN216922661U CN202220407804.3U CN202220407804U CN216922661U CN 216922661 U CN216922661 U CN 216922661U CN 202220407804 U CN202220407804 U CN 202220407804U CN 216922661 U CN216922661 U CN 216922661U
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Abstract
The utility model discloses a control device of a rotatable guide vane at an inlet of a gas compressor, which comprises a gas turbine control system, a safety oil valve group, a left reversing valve group, a right reversing valve group, a servo valve, an oil servomotor, a position sensor, a safety oil restrictor, a control oil inlet pipe, a control oil return pipe, a safety oil inlet pipe and a safety oil discharge pipe; when the unit normally operates, the servo valve can control the position of the connecting rod through the left reversing valve group and the right reversing valve group; when a fault occurs, the gas turbine control system controls the safety oil valve group to unload the safety oil, and then the oil engine automatically moves to a safety position by reversing through the left reversing valve group and the right reversing valve group. The utility model can not only accurately realize the opening control of the servomotor, meet the requirements of the gas turbine on the opening of the servomotor for the speed raising and the load, but also ensure that the servomotor automatically moves to a safe closing position when the device has a servo module fault, a servo valve jam and a position sensor fault.
Description
Technical Field
The utility model belongs to the technical field of gas turbines, and particularly relates to a control device for a rotatable guide vane at an inlet of a gas compressor.
Background
The development of the gas turbine represents the overall level of the national major equipment manufacturing industry and is one of the important signs of the national high and new technology and technology strength. In the key technology of a gas turbine, a compressor belongs to one of important parts of the gas turbine, and mainly plays a role in sucking air from the ambient atmosphere, compressing the air and then supplying the air with certain pressure and temperature to a combustor positioned at the outlet of the compressor. The gas turbine has the main functions that the direction of air flow entering the gas turbine is adjusted by changing the angle of the guide vane, the unit is prevented from surging and stalling in the starting and stopping processes of the unit, the safe operation of the unit is protected, and when the unit is in loaded operation, the angle of the blades of the gas turbine is controlled by adjusting the opening of the control structure, the air inlet flow of the unit is adjusted, so that the operation efficiency of the gas turbine is improved. Therefore, the control structure of the guide vane is particularly important in the key technology of the gas turbine, and the gas turbine can adjust the air quantity entering the gas turbine through the control structure, so that different working conditions of the gas turbine such as speed rise, load carrying and the like are realized.
At present, the hydraulic control servomotor without a spring is generally adopted as a control structure to adjust the guide vane, and the specific adjusting process is as follows: the servo valve is connected with the servo module instruction of the control system, the position sensor signals are sent to the servo module, and the servo module, the position sensor signals are cooperated to work, so that the control of the opening degree of the servomotor can be realized. However, the servomotor itself is not equipped with an automatic return spring, and a single servo card and a single servo valve are generally adopted in China to control the servomotor. Therefore, when the control system is in failure and the control instruction is inconsistent with the position feedback, the servomotor cannot be controlled at a preset position, the compressor can surge, the body of the compressor vibrates violently, accidents can be caused seriously, and the safe operation of the unit is directly influenced. Common faults are more prominent and are represented by faults of a servo module, jamming of a servo valve and faults of a position sensor. Therefore, how to improve the reliability of the control system and make it automatically act to a safe position when the control system fails to work so as to ensure the safe operation of the unit is a technical problem which needs to be solved at present.
In addition, although the technology of controlling the oil engine by combining the double servo cards with the double servo valves is available in foreign countries, the double servo design has the technical problems of complex structure, complicated control procedures and high cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the problems in the prior art and provides a control device for the inlet rotatable guide vanes of the gas compressor.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a compressor import can change controlling means of stator which characterized in that: the system comprises a gas turbine control system, a safety oil valve group, a left reversing valve group, a right reversing valve group, a servo valve, an oil servomotor, a position sensor, a safety oil restrictor, a control oil inlet pipe, a control oil return pipe, a safety oil inlet pipe and a safety oil discharge pipe;
the gas turbine control system is respectively connected with the servo valve, the safety oil valve group, the left reversing valve group, the right reversing valve group and the position sensor;
the control oil inlet pipe is connected with the safety oil inlet pipe through a safety oil restrictor;
the safety oil valve group is respectively connected with the control oil inlet pipe, the safety oil inlet pipe and the safety oil outlet pipe;
the hydraulic servomotor comprises a left oil cylinder, a right oil cylinder and a connecting rod, and the position sensor is fixed on the connecting rod;
the left reversing valve group and the right reversing valve group are arranged in parallel, and the left reversing valve group is respectively connected with the safety oil inlet pipe, the control oil return pipe, the servo valve and the left oil cylinder; the right reversing valve group is respectively connected with a safety oil inlet pipe, a control oil return pipe, a servo valve and a right oil cylinder;
the servo valve is respectively connected with the left reversing valve group, the right reversing valve group, the control oil inlet pipe and the control oil return pipe, and the servo valve can control the position of the connecting rod between the left oil cylinder and the right oil cylinder through the left reversing valve group and the right reversing valve group; when a fault occurs, the gas turbine control system controls the safety oil valve group to unload the safety oil, and then the oil engine automatically moves to a safety position by reversing through the left reversing valve group and the right reversing valve group.
The left side switching-over valves are including parallelly connected first liquid accuse switching-over valve and the second liquid accuse switching-over valve that sets up, the right side switching-over valves are including parallelly connected third liquid accuse switching-over valve and the fourth liquid accuse switching-over valve that sets up, and first liquid accuse switching-over valve and second liquid accuse switching-over valve are equallyd divide and are advanced the pipe with safe oil respectively, control oil returns oil pipe, servo valve and left side hydro-cylinder and be connected, and third liquid accuse switching-over valve and fourth liquid accuse switching-over valve are equallyd divide and are advanced the pipe with safe oil respectively, control oil advances the pipe, control oil returns oil pipe, servo valve and right side hydro-cylinder and are connected.
The first hydraulic control reversing valve, the second hydraulic control reversing valve and the right reversing valve group comprise a third hydraulic control reversing valve and a fourth hydraulic control reversing valve which respectively comprise a control oil port I, a reversing oil port II, a reversing oil port III, a reversing oil port IV and an oil discharge port V; the servo valve comprises a control oil port P, an oil discharge port T, a reversing oil port A and a reversing oil port B; wherein,
a control oil port P of the servo valve is connected with a control oil inlet pipe, and an oil outlet T of the servo valve is connected with a control oil return pipe;
the control oil port I of the first hydraulic control reversing valve and the control oil port I of the second hydraulic control reversing valve are connected with the safe oil inlet pipe, the reversing oil port II of the first hydraulic control reversing valve, the reversing oil port II of the second hydraulic control reversing valve, the oil outlet port V of the first hydraulic control reversing valve and the oil outlet port V of the second hydraulic control reversing valve are connected with the control oil return pipe, the reversing oil port III of the first hydraulic control reversing valve and the reversing oil port III of the second hydraulic control reversing valve are connected with the left oil cylinder, and the reversing oil port IV of the first hydraulic control reversing valve and the reversing oil port IV of the second hydraulic control reversing valve are connected with the reversing oil port A of the servo valve;
the control oil port I of the third hydraulic control reversing valve and the control oil port I of the fourth hydraulic control reversing valve are both connected with the safe oil inlet pipe, the reversing oil port II of the third hydraulic control reversing valve and the reversing oil port II of the fourth hydraulic control reversing valve are both connected with the control oil inlet pipe, the reversing oil port III of the third hydraulic control reversing valve and the reversing oil port III of the fourth hydraulic control reversing valve are both connected with the right oil cylinder, the reversing oil port IV of the third hydraulic control reversing valve and the reversing oil port IV of the fourth hydraulic control reversing valve are both connected with the reversing oil port B of the servo valve, and the oil outlet V of the third hydraulic control reversing valve and the oil outlet V of the fourth hydraulic control reversing valve are both connected with the control oil return pipe.
Be equipped with the oil feed flow controller between right side hydro-cylinder and the right side switching-over valves, be equipped with left side pressure transmitter and right side pressure transmitter on left side hydro-cylinder and the right side hydro-cylinder respectively, and left side pressure transmitter and right side pressure transmitter all are connected with combustion engine control system.
And a filter and a differential pressure indicator bypassing at one side of the filter are arranged between the servo valve and the control oil inlet pipe, and the differential pressure indicator is connected with a combustion engine control system.
The safety oil valve group comprises a pressure assembly, an intermediate oil pressure transmitter, a first test throttler, a second test throttler, a safety oil branch pipe and four control valve groups, the safety oil branch pipe is arranged between a safety oil inlet pipe and a safety oil outlet pipe, the four control valve groups are connected in parallel in pairs and then sequentially connected in series on the safety oil branch pipe, the first test throttler and the second test throttler are respectively arranged on the safety oil branch pipes at the rear ends of the two control valve groups, the intermediate oil pressure transmitter is arranged between the first test throttler and the rear pair of control valve groups, and the pressure assembly is arranged between the safety oil inlet pipe and the front pair of control valve groups.
The control valve groups comprise unloading valves and electromagnetic valves connected with control cavities of the unloading valves, the electromagnetic valves are all connected with a gas turbine control system, oil inlet ends and oil outlet ends of working cavities of the unloading valves are all connected to a safety oil branch pipe, the oil inlet ends and the oil outlet ends of the working cavities of the unloading valves in the former pair of control valve groups are respectively located on two sides of the first test throttler, and the oil inlet ends and the oil outlet ends of the working cavities of the unloading valves in the latter pair of control valve groups are respectively located on two sides of the second test throttler; the electromagnetic valve is respectively connected with the control oil inlet pipe and the safety oil outlet pipe.
The pressure assembly comprises a safety oil pressure transmitter, a first safety oil pressure switch, a second safety oil pressure switch and a third safety oil pressure switch which are all connected with the gas turbine control system, and the safety oil pressure transmitter, the first safety oil pressure switch, the second safety oil pressure switch and the third safety oil pressure switch are sequentially arranged on a safety oil branch pipe between the safety oil inlet pipe and the control valve group.
The utility model has the advantages that:
1. the hydraulic actuating mechanism adopts the oil motors with the oil cylinders on the two sides, oil inlet and oil outlet of the oil cylinders on the two sides of the oil motors are controlled by the servo valves, the response speed of the hydraulic actuating mechanism is high, hydraulic power oil is stable, and safe operation of the air compressor is guaranteed. In addition, through the combination of the specific components, the utility model can not only accurately realize the opening control of the servomotor and meet the requirements of the gas turbine on the opening of the servomotor for the speed rise and the load, but also ensure that the servomotor automatically moves to a safe closing position when the device has the faults of a servo module, a servo valve and a position sensor, thereby improving the safety of the unit during operation.
2. The servo-control system controls the control oil entering the servomotor to enable the connecting rod of the servomotor to act, collects position feedback of the connecting rod through the position sensor, adopts servo control, compares a control instruction with the position feedback, is high in control precision, and can realize accurate control of the position of the connecting rod in the servomotor.
3. The filter is arranged at the inlet of the servo valve, so that the probability of jamming of the servo valve is effectively reduced, the reliability of the oil engine is improved, the differential pressure of the filter is monitored, and when the filter is blocked, an alarm can be given out, so that the filter element can be replaced in time.
4. The left reversing valve group and the right reversing valve group respectively adopt two reversing valves connected in parallel, any one of the reversing valves fails, the action of the servomotor to a safe closing position in the case of failure is not influenced, and the reliability of the control device is higher.
5. The utility model adopts the safety oil valve group with a specific structure to establish the unit safety oil, the establishment and the unloading of the safety oil are realized by the matching of four electromagnetic valves, an unloading valve and a restrictor, the establishment and the unloading of the safety oil cannot be influenced when any electromagnetic valve fails, and the reliability of the control device is higher. In addition, the size of the throttling device can be changed, and the time for establishing the safety oil can be adjusted, so that different requirements can be met conveniently.
6. When any one of the four electromagnetic valves fails, the utility model can realize alarm through the intermediate oil pressure transmitter, and the four electromagnetic valves can be used for performing on-line action tests and can be replaced on line, thereby being convenient to maintain.
7. According to the utility model, the pressure transmitter and the pressure switch are arranged in the safety oil valve group for monitoring, the pressure switch 3 is in redundant configuration, when safety oil is unloaded, the pressure switch acts to trigger the unit to stop, so that the safety of the unit is ensured, and the stop protection is reliable.
8. When the servo valve is jammed and the position sensor fails, the safety oil is unloaded firstly and then is reversed through the hydraulic control reversing valve, so that the action of the oil motor to a safe closing position is realized, and the safe operation of the gas compressor is guaranteed.
9. According to the utility model, the oil inlet throttler is arranged between the right oil cylinder and the right reversing valve group, so that the servomotor can be slowly closed to a safe closing position in the case of failure, the servomotor is prevented from being rapidly closed, and the safe operation of the compressor is ensured.
10. The utility model can meet the requirements of regulating the opening degree of the oil motor in the compressor under normal conditions and operating the oil motor to a safe closing position under fault conditions, has high reliability of the device and low manufacturing cost, and ensures the safe operation of the compressor.
Drawings
Fig. 1 is a schematic diagram of the principle of the present invention.
Labeled in the figure as: 1. a control oil inlet pipe, 2, a safety oil throttle, 3, a safety oil inlet pipe, 4, a safety oil pressure transmitter, 5, a first safety oil pressure switch, 6, a second safety oil pressure switch, 7, a third safety oil pressure switch, 8, an electromagnetic valve, 9, an unloading valve, 10, an oil motor, 11, a left reversing valve group, 12, a right reversing valve group, 13, a control oil return pipe, 14, a left oil cylinder, 15, a right oil cylinder, 16, a first test throttle, 17, an intermediate oil pressure transmitter, 18, a second test throttle, 19, a safety oil discharge pipe, 20, a safety oil valve group, 21, a connecting rod, 22, a filter, 23, a differential pressure indicator, 24, a first hydraulic control reversing valve, 25, a second hydraulic control reversing valve, 26, a third hydraulic control reversing valve, 27, a fourth hydraulic control reversing valve, 28, a servo valve, 29, an oil inlet throttle, 30, a right pressure transmitter, 31. left side pressure transmitter, 32, position sensor, 33, combustion engine control system.
Detailed Description
Example 1
The embodiment discloses a control device of a rotatable guide vane at an inlet of a compressor, which comprises a gas turbine control system 33 (a gas turbine control system), a safety oil valve group 20, a left reversing valve group 11, a right reversing valve group 12, a servo valve 28, an oil servomotor 10, a position sensor 32, a safety oil restrictor 2, a control oil inlet pipe 1, a control oil return pipe 13, a safety oil inlet pipe 3 and a safety oil discharge pipe 19; the control device can accurately realize the opening control of the servomotor 10, meet the requirements of the gas turbine on the opening of the servomotor 10 for the acceleration and the load, and can ensure that the servomotor 10 automatically moves to a safe closing position when the device has a servo module fault, a servo valve 28 is jammed and a position sensor 32 has a fault, thereby improving the safety of the unit in operation. Specifically, the structure, position and connection relationship of each component are respectively as follows:
the gas turbine control system 33 is respectively connected with the servo valve 28, the safety oil valve group 20, the left reversing valve group 11, the right reversing valve group 12 and the position sensor 32, and mainly has the function of controlling corresponding valve actions according to related detection data.
One end of the control oil inlet pipe 1 is connected with the control port, the other end of the control oil inlet pipe is connected with the safety oil inlet pipe 3 through the safety oil restrictor 2, on one hand, safety oil is formed through the safety oil restrictor 2, and on the other hand, control oil is provided for the control device.
The safety oil valve group 20 is respectively connected with the control oil inlet pipe 1, the safety oil inlet pipe 3 and the safety oil discharge pipe 19, and the establishment and the unloading of safety oil can be realized.
The oil engine 10 comprises a left oil cylinder 14, a right oil cylinder 15 and a connecting rod 21, wherein two ends of the connecting rod 21 are respectively positioned outside the left oil cylinder 14 and the right oil cylinder 15, and the position of the connecting rod 21 can be controlled by controlling the oil inlet and the oil outlet of the left oil cylinder 14 and the right oil cylinder 15. The position sensor 32 is fixed to the connecting rod 21 for monitoring the position of the connecting rod 21 in real time and transmitting the monitored position data to the fuel control system 33.
Further, be equipped with oil feed restrictor 29 between right side hydro-cylinder 15 and the right side switching-over valves 12, be equipped with left side pressure transmitter 31 and right side pressure transmitter 30 on left side hydro-cylinder 14 and the right side hydro-cylinder 15 respectively, and left side pressure transmitter 31 and right side pressure transmitter 30 all are connected with combustion engine control system 33. The oil inlet restrictor 29 can slowly and stably close the servomotor 10 when a fault occurs, so that the fault of the press caused by quick closing is avoided. The pressure inside the oil cylinder can be detected in real time through the left pressure transmitter 31 and the right pressure transmitter 30, and early warning can be timely given out when the oil engine 10 is jammed through monitoring the pressure of the oil cylinder.
The left reversing valve group 11 and the right reversing valve group 12 are arranged in parallel, and the left reversing valve group 11 is respectively connected with the safety oil inlet pipe 3, the control oil return pipe 13, the servo valve 28 and the left oil cylinder 14; the right reversing valve group 12 is respectively connected with the safety oil inlet pipe 3, the control oil inlet pipe 1, the control oil return pipe 13, the servo valve 28 and the right oil cylinder 15. The left reversing valve group 11 and the right reversing valve group 12 are matched to control oil inlet and outlet of the left oil cylinder 14 and the right oil cylinder 15, so that the opening of the oil engine 10 can be adjusted.
The servo valve 28 is respectively connected with the left reversing valve group 11, the right reversing valve group 12, the control oil inlet pipe 1 and the control oil return pipe 13, and when the unit normally operates, the servo valve 28 can control the position of the connecting rod 21 between the left oil cylinder 14 and the right oil cylinder 15 through the left reversing valve group 11 and the right reversing valve group 12, so that the opening of the oil-operated machine 10 can be adjusted; when a fault occurs, the combustion engine control system 33 controls the safety oil valve bank 20 to unload the safety oil, and then the direction of the safety oil valve bank is reversed through the left direction reversing valve bank 11 and the right direction reversing valve bank 12, so that the servomotor 10 automatically moves to a safety position (a safety closing position).
The left-side reversing valve group 11 comprises a first hydraulic control reversing valve 24 and a second hydraulic control reversing valve 25 which are arranged on the safe oil inlet pipe 3 in parallel, the right-side reversing valve group 12 comprises a third hydraulic control reversing valve 26 and a fourth hydraulic control reversing valve 27 which are arranged on the safe oil inlet pipe 3 in parallel, the first hydraulic control reversing valve 24 and the second hydraulic control reversing valve 25 are connected with the safe oil inlet pipe 3, the control oil return pipe 13, the servo valve 28 and the left-side oil cylinder 14 respectively, and the third hydraulic control reversing valve 26 and the fourth hydraulic control reversing valve 27 are connected with the safe oil inlet pipe 3, the control oil inlet pipe 1, the control oil return pipe 13, the servo valve 28 and the right-side oil cylinder 15 respectively.
Further, the first hydraulic control directional control valve 24, the second hydraulic control directional control valve 25 and the right directional control valve group 12 comprise a third hydraulic control directional control valve 26 and a fourth hydraulic control directional control valve 27, which respectively comprise a control oil port one, a directional control oil port two, a directional control oil port three, a directional control oil port four and an oil discharge port five; the servo valve 28 comprises a control oil port P, an oil discharge port T, a reversing oil port A and a reversing oil port B; wherein,
a control oil port P of the servo valve 28 is connected with the control oil inlet pipe 1, and an oil outlet T of the servo valve 28 is connected with the control oil return pipe 13;
the first control oil port of the first hydraulic control reversing valve 24 and the first control oil port of the second hydraulic control reversing valve 25 are connected with the safety oil inlet pipe 3, the second reversing oil port of the first hydraulic control reversing valve 24, the second reversing oil port of the second hydraulic control reversing valve 25, the fifth oil outlet of the first hydraulic control reversing valve 24 and the fifth oil outlet of the second hydraulic control reversing valve 25 are connected with the control oil return pipe 13, the third reversing oil port of the first hydraulic control reversing valve 24 and the third reversing oil port of the second hydraulic control reversing valve 25 are connected with the left side oil cylinder 14, and the fourth reversing oil port of the first hydraulic control reversing valve 24 and the fourth reversing oil port of the second hydraulic control reversing valve 25 are connected with the reversing oil port a of the servo valve 28.
The first control oil port of the third hydraulic control reversing valve 26 and the first control oil port of the fourth hydraulic control reversing valve 27 are both connected with the safety oil inlet pipe 3, the second reversing oil port of the third hydraulic control reversing valve 26 and the second reversing oil port of the fourth hydraulic control reversing valve 27 are both connected with the control oil inlet pipe 1, the third reversing oil port of the third hydraulic control reversing valve 26 and the third reversing oil port of the fourth hydraulic control reversing valve 27 are both connected with the right-side oil cylinder 15, the fourth reversing oil port of the third hydraulic control reversing valve 26 and the fourth reversing oil port of the fourth hydraulic control reversing valve 27 are both connected with the reversing oil port B of the servo valve 28, and the fifth oil outlet of the third hydraulic control reversing valve 26 and the fifth oil outlet of the fourth hydraulic control reversing valve 27 are both connected with the control oil return pipe 13.
The safety oil valve group 20 comprises a pressure assembly, an intermediate oil pressure transmitter 17, a first test throttler 16, a second test throttler 18, a safety oil branch pipe and four control valve groups, the safety oil branch pipe is arranged between a safety oil inlet pipe 3 and a safety oil outlet pipe 19, the four control valve groups are connected in parallel in pairs and then sequentially connected in series on the safety oil branch pipe, the first test throttler 16 and the second test throttler 18 are respectively arranged on the safety oil branch pipes at the rear ends of the two control valve groups, the intermediate oil pressure transmitter 17 is arranged between the first test throttler 16 and the rear control valve group, and the pressure assembly is arranged between the safety oil inlet pipe 3 and the front control valve group. It should be noted that the pressure assembly, the intermediate oil pressure transmitter 17 and the four control valve sets are all connected to the combustion engine control system 33.
Furthermore, the control valve group comprises an unloading valve 9 and an electromagnetic valve 8 connected with a control cavity of the unloading valve 9, generally, the four control valve groups comprise four unloading valves 9 and four electromagnetic valves 8, but the four unloading valves 9 and the four electromagnetic valves 8 can be correspondingly increased or decreased according to actual needs, each electromagnetic valve 8 is connected with a gas turbine control system 33, an oil inlet end and an oil outlet end of a working cavity of each unloading valve 9 are connected to a safety oil branch pipe, an oil inlet end and an oil outlet end of the working cavity of the unloading valve 9 in the former pair of control valve groups are respectively located at two sides of the first test throttler 16, and an oil inlet end and an oil outlet end of the working cavity of the unloading valve 9 in the latter pair of control valve groups are respectively located at two sides of the second test throttler 18; the electromagnetic valve 8 is respectively connected with the control oil inlet pipe 1 and the safety oil outlet pipe 19.
Furthermore, the pressure assembly comprises a safety oil pressure transmitter 4, a first safety oil pressure switch 5, a second safety oil pressure switch 6 and a third safety oil pressure switch 7 which are all connected with the gas turbine control system 33, and the safety oil pressure transmitter 4, the first safety oil pressure switch 5, the second safety oil pressure switch 6 and the third safety oil pressure switch 7 are sequentially arranged on a safety oil branch pipe between the safety oil inlet pipe 3 and the control valve group.
The present embodiment is described in detail below with reference to the accompanying drawings, as follows:
as shown in fig. 1, a control oil inlet pipe 1 is used to supply control oil; the control oil has eight go directions, which are respectively a servo valve 28, a third hydraulic control reversing valve 26, a fourth hydraulic control reversing valve 27, a safety oil throttle 2 and the electromagnetic valve 8 in the four control valve groups.
The control oil enters the servomotor 10 through the servo valve 28, the left reversing valve group 11 and the right reversing valve group 12 to provide motion power for the servomotor 10. The control oil forms safety oil through the safety oil restrictor 2. The control oil respectively provides action power for the corresponding unloading valves 9 through the electromagnetic valves 8, and the electromagnetic valves 8 are opened/closed through electrification and power loss of the four electromagnetic valves 8, so that the four unloading valves 9 are opened/closed, and further the establishment and unloading of the safety oil are realized.
The safe oil injection point is that the control oil passes through the safe oil restrictor 2, when the four electromagnetic valves 8 are electrified, the control oil enters the control cavities of the four unloading valves 9, the four unloading valves 9 are closed, the control oil is injected into the safe oil inlet pipe 3 through the safe oil restrictor 2, the pressure of the safe oil rises, and the safe oil is established.
When the four electromagnetic valves 8 are powered off, the pressure oil in the cavity is controlled by the four unloading valves 9 to be discharged to the safety oil discharge pipe 19, the four unloading valves 9 are opened, the safety oil in the working cavity of the unloading valves 9 is discharged through the safety oil branch pipes and the safety oil discharge pipe 19, the pressure of the safety oil cannot be built, and the safety oil is discharged.
The establishment of the safety oil in the control device is monitored by a safety oil pressure transmitter 4, a first safety oil pressure switch 5, a second safety oil pressure switch 6 and a third safety oil pressure switch 7 are arranged, and shutdown protection is triggered by the three pressure switches when the safety oil pressure is low. An intermediate oil pressure transmitter 17, a first test throttler 16 and a second test throttler 18 are arranged among the four safety oil unloading valves 9, the four electromagnetic valves 8 have an online test function, and the online test of the electromagnetic valves 8 is carried out singly. When the online test is carried out, any one of the four electromagnetic valves 8 can be de-energized, the corresponding intermediate oil pressure transmitter 17 displays the current pressure value, and the numerical value displayed by the intermediate oil pressure transmitter 17 is used as the criterion for the success of the online test of the electromagnetic valve 8.
The first control oil port of the first hydraulic control reversing valve 24 and the first control oil port of the second hydraulic control reversing valve 25 are both connected with the safety oil inlet pipe 3, the second reversing oil port of the first hydraulic control reversing valve 24 and the second reversing oil port of the second hydraulic control reversing valve 25 are both connected with the control oil return pipe 13, the third reversing oil port of the first hydraulic control reversing valve 24 and the third reversing oil port of the second hydraulic control reversing valve 25 are both connected with the left side oil cylinder 14, the fourth reversing oil port of the first hydraulic control reversing valve 24 and the fourth reversing oil port of the second hydraulic control reversing valve 25 are both connected with the reversing oil port a of the servo valve 28, and the fifth oil outlet of the first hydraulic control reversing valve 24 and the fifth oil outlet of the second hydraulic control reversing valve 25 are both connected with the control oil return pipe 13. The first control oil port of the third hydraulic control directional control valve 26 and the first control oil port of the fourth hydraulic control directional control valve 27 are both connected with the safety oil inlet pipe 3, the second reversing oil port of the third hydraulic control directional control valve 26 and the second reversing oil port of the fourth hydraulic control directional control valve 27 are both connected with the control oil pipeline 1, the third reversing oil port of the third hydraulic control directional control valve 26 and the third reversing oil port of the fourth hydraulic control directional control valve 27 are both connected with the right-side oil cylinder 15, the fourth reversing oil port of the third hydraulic control directional control valve 26 and the fourth reversing oil port of the fourth hydraulic control directional control valve 27 are both connected with the reversing oil port B of the servo valve 28, and the fifth oil outlet port of the third hydraulic control directional control valve 26 and the fifth oil outlet of the fourth hydraulic control directional control valve 27 are both connected with the control oil return pipe 13.
When the unit is started, when the four electromagnetic valves 8 are electrified, the control oil enters the control cavities of the four unloading valves 9, the four unloading valves 9 are closed, the control oil is injected into the safety oil inlet pipe 3 through the safety oil restrictor 2, the pressure of the safety oil rises, and the safety oil of the control device is established. After the safe oil is established, the pressure of the first control oil port of the first hydraulic control reversing valve 24 is established, the valve core of the first hydraulic control reversing valve 24 moves towards the right side, the fifth oil outlet of the first hydraulic control reversing valve discharges oil to the control oil return pipe 13, the reversing result is that the second reversing oil port is not communicated, and the third reversing oil port is communicated with the fourth reversing oil port. The pressure of the first control oil port of the second hydraulic control reversing valve 25 is established, the valve core of the second hydraulic control reversing valve 25 moves towards the right side, the fifth oil discharge port of the second hydraulic control reversing valve discharges oil to the control oil return pipe 13, the reversing result is that the second reversing oil port is not communicated, and the third reversing oil port is communicated with the fourth reversing oil port. The pressure of the first control oil port of the third hydraulic control reversing valve 26 is built, the valve core of the third hydraulic control reversing valve 26 moves towards the right side, the fifth oil discharge port discharges oil to the control oil return pipe 13, the reversing result is that the second reversing oil port is not communicated, and the third reversing oil port is communicated with the fourth reversing oil port. The pressure of the first control port of the fourth hydraulic control reversing valve 27 is established, the valve core of the fourth hydraulic control reversing valve 27 moves towards the right side, the fifth oil discharge port of the fourth hydraulic control reversing valve discharges oil to the control oil return pipe 13, the reversing result is that the second reversing port is not communicated, and the third reversing port is communicated with the fourth reversing port.
After the safety oil is established, when the servomotor 10 needs to be opened, the gas turbine control system 33 sends an opening instruction to the servo valve 28, the control oil port P of the servo valve 28 is communicated with the reversing oil port a, the oil discharge port T is communicated with the reversing oil port B, the control oil flows to the reversing oil port a through the control oil port P of the servo valve 28, flows to the reversing oil port four of the first hydraulic control reversing valve 24 and the reversing oil port four of the second hydraulic control reversing valve 25, and enters the left side oil cylinder 14 through the reversing oil port three of the first hydraulic control reversing valve 24 and the reversing oil port three of the second hydraulic control reversing valve 25. The oil in the right oil cylinder 15 flows through the oil inlet restrictor 29 to the third reversing oil port of the third hydraulic control reversing valve 26 and the third reversing oil port of the fourth hydraulic control reversing valve 27, is discharged to the reversing oil port B of the servo valve 28 through the fourth reversing oil port of the third hydraulic control reversing valve 26 and the fourth reversing oil port of the fourth hydraulic control reversing valve 27, and is discharged to the control oil return pipe 13 through the oil discharge port T of the servo valve 28, so that the oil discharge of the right oil cylinder 15 is realized. The connecting rod 21 is fed with oil from the left oil cylinder 14, the right oil cylinder 15 extends out when oil is discharged, opening direction movement of the servomotor 10 is achieved, the position of the connecting rod 21 is fed back to the gas turbine control system 33 through the position sensor 32, when the position required by control is reached, the gas turbine control system 33 controls the control oil port P of the servo valve 28 to be not communicated with the reversing oil port A, the oil discharge port T is not communicated with the reversing oil port B, the left oil cylinder 14 is not fed with oil, the right oil cylinder 15 is not discharged with oil, the connecting rod 21 does not move any more, and the oil turbine 10 is stabilized at the current position, and opening control of the servomotor 10 is achieved.
After the safety oil is established, when the servomotor 10 needs to be closed, the gas turbine control system 33 sends a closing instruction to the servo valve 28, the control oil port P of the servo valve 28 is communicated with the reversing oil port B, the oil discharge port T is communicated with the reversing oil port a, the control oil flows to the reversing oil port B through the control oil port P of the servo valve 28, flows to the fourth reversing oil port of the third hydraulic control reversing valve 26 and the fourth reversing oil port of the fourth hydraulic control reversing valve 27, passes through the third reversing oil port of the third hydraulic control reversing valve 26 and the third reversing oil port of the fourth hydraulic control reversing valve 27, and enters the right oil cylinder 15 through the oil inlet restrictor 29. At this time, the oil in the left oil cylinder 14 is discharged to the third reversing oil port of the first hydraulic control reversing valve 24 and the third reversing oil port of the second hydraulic control reversing valve 25, and is discharged to the reversing oil port a of the servo valve 28 through the fourth reversing oil port of the first hydraulic control reversing valve 24 and the fourth reversing oil port of the second hydraulic control reversing valve 25, and is discharged to the control oil return pipe 13 through the oil discharge port T of the servo valve 28, so that the oil discharge of the left oil cylinder 14 is realized. The connecting rod 21 is fed with oil from the right oil cylinder 15, the left oil cylinder 14 retracts when discharging oil, the closed direction movement of the servomotor 10 is realized, the position of the connecting rod 21 is fed back to the gas turbine control system 33 through the position sensor 32, when the position required by control is reached, the gas turbine control system 33 controls the control oil port P of the servo valve 28 to be not communicated with the reversing oil port B, the oil discharge port T is not communicated with the reversing oil port A, the right oil cylinder 15 is not fed with oil, the left oil cylinder 14 is not discharged with oil, the connecting rod 21 does not move any more, the current position is stabilized, and the closed control of the servomotor 10 is realized.
When the safety oil is established, the four reversing valves act, and in the running process of the gas turbine, the servo valve 28 and the position sensor 32 work cooperatively to realize the control of the opening degree of the oil-actuated machine 10, realize the regulation of the air quantity entering the gas turbine and realize different working conditions of the gas turbine such as the speed rise, the load carrying and the like.
When a servo module fault, a jamming of the servo valve 28 or a fault of the position sensor 32 occurs, a deviation occurs between a control instruction and position feedback of the gas turbine control system 33, namely when the connecting rod 21 cannot be controlled at a required position, the servomotor 10 cannot change the angle of the blade according to a preset position, the function of adjusting the direction of the air flow entering the compressor fails, and the gas turbine cannot run safely. When the situation occurs, the gas turbine control system 33 simultaneously controls the four electromagnetic valves 8 to lose power, when the four electromagnetic valves 8 lose power, the pressure oil in the control cavities of the four unloading valves 9 is discharged to the safety oil discharge pipe 19, the four unloading valves 9 are opened, the safety oil is discharged through the safety oil discharge pipe 19, and the safety oil is unloaded.
After the safety oil is unloaded, the pressure oil of the first control oil port of the first hydraulic control reversing valve 24 is unloaded, the valve core moves to the left side under the action of the spring, the fourth reversing oil port is not communicated as a reversing result, and the third reversing oil port is communicated with the second reversing oil port. The pressure oil of the first control oil port of the second hydraulic control reversing valve 25 is unloaded, the valve core moves towards the left side under the action of the spring, the fourth reversing oil port is not communicated as a reversing result, and the third reversing oil port is communicated with the second reversing oil port. The pressure of the first control oil port of the third hydraulic control reversing valve 26 is unloaded, the valve core moves towards the left side under the action of the spring, the fourth reversing oil port is not communicated as a reversing result, and the third reversing oil port is communicated with the second reversing oil port. The pressure of the first control oil port of the fourth hydraulic control reversing valve 27 is unloaded, the valve core moves towards the left side under the action of the spring, the fourth reversing oil port is not communicated as a reversing result, and the third reversing oil port is communicated with the second reversing oil port.
After the four hydraulic control one-way valves act, the control oil passes through the second reversing oil port of the third hydraulic control reversing valve 26 and the second reversing oil port of the fourth hydraulic control reversing valve 27 to the third reversing oil port of the third hydraulic control reversing valve 26 and the third reversing oil port of the fourth hydraulic control reversing valve 27, passes through the oil inlet restrictor 29, and enters the right oil cylinder 15. Oil in the left oil cylinder 14 is discharged to a third reversing oil port of the first hydraulic control reversing valve 24 and a third reversing oil port of the second hydraulic control reversing valve 25, the oil is discharged to the control oil return pipe 13 through a second reversing oil port of the first hydraulic control reversing valve 24 and a second reversing oil port of the second hydraulic control reversing valve 25, the right oil cylinder 15 slowly feeds oil, the left oil cylinder 14 discharges oil, the connecting rod 21 feeds oil to the right oil cylinder 15 and retracts when the left oil cylinder 14 discharges oil, the slow closing of the oil-operated machine 10 is realized, the oil-operated machine 10 is slowly closed when a servo module fails, the servo valve 28 is jammed, or the position sensor 32 fails, the oil-operated machine slowly reaches a safe closing position, and the safe operation of the air compressor is ensured.
Example 2
In addition to embodiment 1, in order to reduce the probability of occurrence of jamming of the servo valve 28, in the present embodiment, a filter 22 and a differential pressure indicator 23 are provided between the servo valve 28 and the control oil inlet pipe 1, and the differential pressure indicator 23 bypasses the filter 22 side and is connected to the engine control system 33 to monitor the differential pressure of the filter 22. When the filter 22 is blocked, the differential pressure indicator 23 gives an alarm to the gas turbine control system 33 to remind the filter element to be replaced in time so as to ensure the safe operation of the unit.
While the utility model has been described with reference to specific embodiments, any feature disclosed in this specification may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise; all of the disclosed features, or all of the method or process steps, may be combined in any combination, except mutually exclusive features and/or steps.
Claims (8)
1. The utility model provides a compressor import can change controlling means of stator which characterized in that: the device comprises a gas turbine control system (33), a safety oil valve group (20), a left reversing valve group (11), a right reversing valve group (12), a servo valve (28), an oil servomotor (10), a position sensor (32), a safety oil restrictor (2), a control oil inlet pipe (1), a control oil return pipe (13), a safety oil inlet pipe (3) and a safety oil discharge pipe (19);
the gas turbine control system (33) is respectively connected with the servo valve (28), the safety oil valve group (20), the left reversing valve group (11), the right reversing valve group (12) and the position sensor (32);
the control oil inlet pipe (1) is connected with the safety oil inlet pipe (3) through the safety oil restrictor (2);
the safety oil valve group (20) is respectively connected with the control oil inlet pipe (1), the safety oil inlet pipe (3) and the safety oil discharge pipe (19);
the hydraulic servomotor (10) comprises a left oil cylinder (14), a right oil cylinder (15) and a connecting rod (21), and the position sensor (32) is fixed on the connecting rod (21);
the left reversing valve group (11) and the right reversing valve group (12) are arranged in parallel, and the left reversing valve group (11) is respectively connected with the safety oil inlet pipe (3), the control oil return pipe (13), the servo valve (28) and the left oil cylinder (14); the right reversing valve group (12) is respectively connected with the safety oil inlet pipe (3), the control oil inlet pipe (1), the control oil return pipe (13), the servo valve (28) and the right oil cylinder (15);
the servo valve (28) is respectively connected with the left reversing valve group (11), the right reversing valve group (12), the control oil inlet pipe (1) and the control oil return pipe (13), and the servo valve (28) can control the position of the connecting rod (21) between the left oil cylinder (14) and the right oil cylinder (15) through the left reversing valve group (11) and the right reversing valve group (12); when a fault occurs, the combustion engine control system (33) controls the safety oil valve group (20) to unload safety oil, and then the left reversing valve group (11) and the right reversing valve group (12) are reversed to enable the servomotor (10) to automatically move to a safety position.
2. The control apparatus for compressor inlet rotatable vanes according to claim 1, wherein: the left side switching-over valves (11) are including parallelly connected first hydraulic control switching-over valve (24) and the second hydraulic control switching-over valve (25) that sets up, right side switching-over valves (12) are including parallelly connected third hydraulic control switching-over valve (26) and fourth hydraulic control switching-over valve (27) that set up, and first hydraulic control switching-over valve (24) and second hydraulic control switching-over valve (25) are equallyd divide and are advanced pipe (3) with safe oil respectively, control oil returns oil pipe (13), servo valve (28) and left side hydro-cylinder (14) and are connected, and third hydraulic control switching-over valve (26) and fourth hydraulic control switching-over valve (27) are equallyd divide and are advanced pipe (3) with safe oil respectively, control oil advances pipe (1), control oil returns oil pipe (13), servo valve (28) and right side hydro-cylinder (15) and are connected.
3. The control apparatus for compressor inlet rotatable vanes according to claim 2, wherein: the first hydraulic control reversing valve (24), the second hydraulic control reversing valve (25) and the right reversing valve group (12) comprise a third hydraulic control reversing valve (26) and a fourth hydraulic control reversing valve (27) which respectively comprise a control oil port I, a reversing oil port II, a reversing oil port III, a reversing oil port IV and an oil discharge port V; the servo valve (28) comprises a control oil port P, an oil discharge port T, a reversing oil port A and a reversing oil port B; wherein,
a control oil port P of the servo valve (28) is connected with the control oil inlet pipe (1), and an oil outlet T of the servo valve (28) is connected with the control oil return pipe (13);
a first control oil port of a first hydraulic control reversing valve (24) and a first control oil port of a second hydraulic control reversing valve (25) are connected with a safety oil inlet pipe (3), a second reversing oil port of the first hydraulic control reversing valve (24), a second reversing oil port of the second hydraulic control reversing valve (25), a fifth oil outlet of the first hydraulic control reversing valve (24) and a fifth oil outlet of the second hydraulic control reversing valve (25) are connected with a control oil return pipe (13), a third reversing oil port of the first hydraulic control reversing valve (24) and a third reversing oil port of the second hydraulic control reversing valve (25) are connected with a left oil cylinder (14), and a fourth reversing oil port of the first hydraulic control reversing valve (24) and a fourth reversing oil port of the second hydraulic control reversing valve (25) are connected with a reversing A of a servo valve (28);
the first control oil port of the third hydraulic control reversing valve (26) and the first control oil port of the fourth hydraulic control reversing valve (27) are both connected with the safe oil inlet pipe (3), the second reversing oil port of the third hydraulic control reversing valve (26) and the second reversing oil port of the fourth hydraulic control reversing valve (27) are both connected with the control oil inlet pipe (1), the third reversing oil port of the third hydraulic control reversing valve (26) and the third reversing oil port of the fourth hydraulic control reversing valve (27) are both connected with the right-side oil cylinder (15), the fourth reversing oil port of the third hydraulic control reversing valve (26) and the fourth reversing oil port of the fourth hydraulic control reversing valve (27) are both connected with the reversing oil port B of the servo valve (28), and the fifth oil outlet of the third hydraulic control reversing valve (26) and the fifth oil outlet of the fourth hydraulic control reversing valve (27) are both connected with the control oil return pipe (13).
4. The control apparatus for compressor inlet rotatable vanes according to claim 1, wherein: be equipped with oil feed throttle (29) between right side hydro-cylinder (15) and right side switching-over valves (12), be equipped with left side pressure transmitter (31) and right side pressure transmitter (30) on left side hydro-cylinder (14) and right side hydro-cylinder (15) respectively, and left side pressure transmitter (31) and right side pressure transmitter (30) all are connected with combustion engine control system (33).
5. The control device for a compressor inlet rotatable vane according to any one of claims 1 to 4, wherein: a filter (22) and a differential pressure indicator (23) bypassing the filter (22) are arranged between the servo valve (28) and the control oil inlet pipe (1), and the differential pressure indicator (23) is connected with a combustion engine control system (33).
6. The control apparatus for compressor inlet rotatable vanes according to claim 1, wherein: safety oil valves (20) include pressure assembly, middle oil pressure transmitter (17), first experimental choke (16), second experimental choke (18), safe oil branch pipe and four control valves, safe oil branch pipe sets up between safe oil inlet pipe (3) and safe oil discharge pipe (19), establish ties in proper order on safe oil branch pipe after two liang of a pair of parallels of four control valves again, first experimental choke (16) and second experimental choke (18) set up respectively on the safe oil branch pipe of two pairs of control valves rear ends, middle oil pressure transmitter (17) set up between first experimental choke (16) and a pair of control valves afterwards, pressure assembly sets up between safe oil inlet pipe (3) and a pair of control valves before.
7. The control apparatus for compressor inlet rotatable vanes according to claim 6, wherein: the control valve group comprises an unloading valve (9) and an electromagnetic valve (8) connected with a control cavity of the unloading valve (9), the electromagnetic valves (8) are all connected with a gas turbine control system (33), an oil inlet end and an oil discharge end of a working cavity of the unloading valve (9) are all connected to a safety oil branch pipe, an oil inlet end and an oil discharge end of the working cavity of the unloading valve (9) in the former pair of control valve groups are respectively located on two sides of a first test throttler (16), and an oil inlet end and an oil discharge end of the working cavity of the unloading valve (9) in the latter pair of control valve groups are respectively located on two sides of a second test throttler (18); the electromagnetic valve (8) is respectively connected with the control oil inlet pipe (1) and the safety oil outlet pipe (19).
8. The control apparatus for compressor inlet rotatable vanes according to claim 6, wherein: the pressure assembly comprises a safety oil pressure transmitter (4), a first safety oil pressure switch (5), a second safety oil pressure switch (6) and a third safety oil pressure switch (7) which are all connected with a gas turbine control system (33), wherein the safety oil pressure transmitter (4), the first safety oil pressure switch (5), the second safety oil pressure switch (6) and the third safety oil pressure switch (7) are sequentially arranged on a safety oil branch pipe between a safety oil inlet pipe (3) and a control valve group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220407804.3U CN216922661U (en) | 2022-02-28 | 2022-02-28 | Control device for inlet rotatable guide vanes of gas compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220407804.3U CN216922661U (en) | 2022-02-28 | 2022-02-28 | Control device for inlet rotatable guide vanes of gas compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216922661U true CN216922661U (en) | 2022-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220407804.3U Active CN216922661U (en) | 2022-02-28 | 2022-02-28 | Control device for inlet rotatable guide vanes of gas compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216922661U (en) |
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2022
- 2022-02-28 CN CN202220407804.3U patent/CN216922661U/en active Active
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