Power loss monitoring and protecting device for water turbine governor

Abstract

The utility model relates to the technical field of governor power-off monitoring, and particularly discloses a hydraulic turbine governor power-off monitoring protection device which comprises a machine body, a driving disc and a rotating shell are rotationally connected to the machine body, the rotating shell wraps but does not make contact with the driving disc, and the driving disc is in transmission connection with a hydraulic turbine. The machine body is fixedly connected with a friction disc abutting against the rotating shell. An oil storage cavity containing silicone oil is formed in the rotating shell, an oil outlet communicated with the oil storage cavity is formed in the position, close to the rotating axis of the rotating shell, of the rotating shell, an oil return opening communicated with the oil storage cavity is formed in the position, away from the rotating axis of the rotating shell, of the rotating shell, and a sealing valve plate is hinged to the oil outlet of the rotating shell. A control assembly controlling opening and closing of the sealing valve plate according to the circuit state of the speed regulator is arranged on the machine body, when the speed regulator loses power, the sealing valve plate is opened, and an adjusting piece used for adjusting the volume of the oil storage cavity is arranged in the rotating shell. The method has the effect of preventing the water turbine and / or the speed regulator from being damaged after the speed regulator is powered off.

Description

Technical Field

[0001] The present application relates to the technical field of speed regulator power failure monitoring, and in particular to a turbine speed regulator power failure monitoring and protection device. Background Art

[0002] The turbine speed governor is one of the most important auxiliary control devices of the hydro-generator set and is a device designed for the hydropower speed control system.

[0003] In the related technology, a Chinese patent with publication number CN220775382U proposes a power failure monitoring and protection shutdown device for a hydro-generator governor, including a governor body, a transmission wheel connected to the front of the governor body, an electric telescopic rod fixedly connected to the front of the governor body, the output end of the electric telescopic rod capable of contacting the surface of the transmission wheel, a power failure monitoring structure fixedly connected to the right side of the electric telescopic rod, the power failure monitoring structure including a connecting frame fixedly connected to the surface of the electric telescopic rod, a press switch fixedly connected to the inside of the connecting frame, an electromagnet fixedly connected to the top of the connecting frame, the electromagnet electrically connected to the governor body, an iron block adsorbed on the output end of the electromagnet, a bracket fixedly connected to the front of the governor body, the bracket extending from the side away from the governor body to the front of the rocker arm and movably connected to the rocker arm.

[0004] Regarding the above-mentioned related technologies, the inventors believe that there are the following defects: when the turbine rotates rapidly and the speed governor suddenly loses power, the rocker arm will press against the transmission wheel. At this time, the transmission wheel is subjected to strong braking or even a sudden stop. This violent control method can easily cause the turbine and / or speed governor to malfunction. Utility Model Content

[0005] In order to improve the problem that a power failure of a speed governor may easily cause a failure of a turbine and / or a speed governor, the present application provides a power failure monitoring and protection device for a speed governor of a turbine.

[0006] The present application provides a turbine speed governor power failure monitoring and protection device that adopts the following technical solution:

[0007] A power failure monitoring and protection device for a turbine speed governor comprises a body, a driving disc and a rotating shell being rotatably connected to the body, the rotating shell wrapping around but not contacting the driving disc, the driving disc being transmission-connected to the turbine, and a friction disc being fixedly connected to the body and abutting against the rotating shell;

[0008] An oil storage chamber containing silicone oil is provided on the rotating shell, an oil outlet connected to the oil storage chamber is provided on the rotating shell near its rotating axis, and an oil return port connected to the oil storage chamber is provided on the rotating shell away from its rotating axis. A sealing valve plate is hingedly connected to the oil outlet of the rotating shell, and a control component that controls the opening and closing of the sealing valve plate according to the circuit state of the speed regulator is provided on the body, and when the speed regulator loses power, the sealing valve plate opens, and an adjusting member for adjusting the volume of the oil storage chamber is provided in the rotating shell.

[0009] By adopting the above technical solution, the active disk is driven by the turbine. When the speed governor suddenly loses power, the control component receives the power-off signal and closes the sealing valve plate. At this time, the regulating member reduces the volume of the oil storage chamber, causing the silicone oil in the oil storage chamber to be squeezed out from the oil outlet. The silicone oil that enters between the active disk and the rotating shell is affected by the rotating active disk and moves accordingly. Since the friction coefficient of silicone oil is high and the adsorption force between silicone oils is strong, the moving silicone oil continues to bring out the silicone oil in the oil storage chamber. Moreover, the higher the speed of the active disk, the greater the centrifugal force on the silicone oil, the more silicone oil is filled between the active disk and the rotating shell, and the greater the friction on the rotating shell. , the rotating shell is braked by the friction disc until the force of the silicone oil acting on the rotating shell is greater than the maximum static friction between the rotating shell and the friction disc. At this time, the rotating shell rotates slowly. In this process, since the active disc and the rotating shell are non-rigidly connected, the turbine deceleration is relatively gentle, and the deceleration force can be changed with the speed of the turbine to keep the speed of the turbine within a safe range, effectively avoiding damage to the turbine and the speed governor due to excessive speed or sudden braking; when the speed governor restores power, the control component controls the sealing valve plate to close, and the silicone oil returns to the oil storage chamber from the return oil port.

[0010] Optionally, the control component includes an electromagnet and a torsion spring fixed to the rotating shell, the electromagnet is electrically connected to the speed regulator, one end of the torsion spring is fixed to the sealing valve plate, the electromagnet is facing the sealing valve plate, and the sealing valve plate is ferromagnetic. When the electromagnet is energized, the magnetic force of the electromagnet acting on the sealing valve plate is greater than the elastic force of the torsion spring; when the electromagnet is not energized, the torsion spring is in a free state and the sealing valve plate does not seal the oil outlet.

[0011] By adopting the above technical solution, when the speed regulator loses power, the electromagnet receives the signal of the speed regulator power failure and changes the magnetic force in real time. At this time, the sealing valve plate opens under the action of the torsion spring, allowing the silicone oil to flow out from the oil outlet; when the speed regulator restores power, the magnetic force of the electromagnet causes the sealing valve plate to break free from the elastic force of the torsion spring and close again, resulting in a simple structure and high stability.

[0012] Optionally, the adjusting parts are several adjusting rods arranged in the oil storage chamber, and an adjusting groove adapted to the adjusting rod is opened in the oil storage chamber. The adjusting rod is elastically inserted in the adjusting groove, the adjusting rod is ferromagnetic, and the adjusting rod is also facing the electromagnet, and when the electromagnet is powered off, the adjusting rod moves toward the direction close to the active disk.

[0013] By adopting the above technical solution, when the speed regulator loses power, the magnetic force of the electromagnet on the adjusting rod disappears. At this time, the adjusting rod is moved into the oil storage chamber in the direction close to the active disk by the elastic force, thereby reducing the oil storage space of the oil storage chamber. When the speed regulator restores power, the electromagnet sucks the dust of the adjusting rod back into the adjusting slot.

[0014] Optionally, friction grooves are staggeredly provided on the end surfaces of the active disk and the rotating shell that are close to each other.

[0015] By adopting the above technical solution, the staggered friction grooves increase the contact area of ​​the silicone oil, thereby improving the effect of the silicone oil in transmitting energy.

[0016] Optionally, the sealing valve plate is provided with a vent hole that only allows gas to pass through.

[0017] By adopting the above technical solution, when the speed regulator restores power, the sealing valve plate closes, and the silicone oil continues to move to the oil return port under the influence of centrifugal force, and eventually enters the oil storage chamber. The air vents maintain the air pressure on both sides of the sealing valve plate, thereby allowing the silicone oil to flow back to the oil storage chamber more smoothly.

[0018] Optionally, the active disk is electrically connected to a generator, the generator is electrically connected to a UPS, and the UPS is also electrically connected to the speed regulator.

[0019] By adopting the above technical solution, since the active disk is always in transmission connection with the turbine, the generator connected to the active disk also generates electricity as the turbine rotates. The electricity generated by the generator is provided to the UPS, so that the UPS is always fully charged. When the speed regulator loses power, the UPS will temporarily charge the speed regulator in time to ensure its normal operation. The dual protection of the UPS and the rotating disk and rotating shell effectively ensures the safety of the turbine unit.

[0020] Optionally, a color-changing light is electrically connected to the generator.

[0021] By adopting the above technical solution, the light emitted by the color-changing lamp can change according to the current generated by the generator. The current of the generator is mainly affected by the rotation speed of the active disk, and the rotation speed of the active disk corresponds to the rotation speed of the turbine, which makes it convenient for staff to judge the rotation speed of the turbine by judging the color of the light of the color-changing lamp.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The active disc is driven by the turbine. When the governor suddenly loses power, the control component receives the power-off signal and closes the sealing valve plate. At this time, the regulating part reduces the volume of the oil storage chamber, causing the silicone oil in the oil storage chamber to be squeezed out from the oil outlet. The silicone oil that enters between the active disc and the rotating shell is affected by the rotating active disc and moves with it. Due to the high friction coefficient of silicone oil and the strong adsorption force between silicone oils, the moving silicone oil continues to carry out the silicone oil in the oil storage chamber and enters the oil return port due to centrifugal force. As the sealing valve plate changes, the oil discharge and return processes are constantly in a new balance. In this process, since the active disc and the rotating shell are non-rigidly connected, the turbine deceleration is relatively gentle, and the deceleration force can be changed with the turbine speed to keep the turbine speed within a safe range, effectively avoiding damage to the turbine and governor due to excessive turbine speed or sudden braking;

[0024] 2. When the speed governor loses power, the magnetic force exerted by the electromagnet on the regulating rod disappears. The regulating rod is then elastically moved toward the active disc into the oil reservoir, thereby reducing the oil storage space. When power is restored to the speed governor, the electromagnet sucks the regulating rod back into the regulating slot.

[0025] 3. Since the driving disk is always in transmission connection with the turbine, the generator connected to the driving disk also generates electricity as the turbine rotates. The electricity generated by the generator is provided to the UPS, so that the UPS is always fully charged. When the speed regulator loses power, the UPS will temporarily charge the speed regulator in time to ensure its normal operation. The dual protection of the UPS and the rotating disk and rotating shell effectively ensures the safety of the turbine unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0027] Figure 2 It is along Figure 1 Schematic diagram of the cross-sectional structure along line AA;

[0028] Figure numerals: 1. Body; 21. Active disk; 22. Rotating shell; 221. Oil storage chamber; 222. Oil outlet; 223. Oil return port; 224. Sealing valve plate; 23. Friction disk; 3. Control assembly; 31. Electromagnet; 32. Torsion spring; 41. Adjusting rod; 42. Adjusting groove; 5. Friction groove; 61. Generator; 611. Color-changing light; 62. UPS. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-2 This application is described in further detail.

[0030] The embodiment of the present application discloses a power failure monitoring and protection device for a turbine speed governor. Figure 1 and Figure 2 The cam 22 is provided with a plurality of support members 224, 226 and 227, which are connected to the cam 22 and the support member 228. The support members 22 are connected to the cam 22 and the support member 229. The support members 22 are connected to the cam 22 and the support member 221.

[0031] The active disk 21 is driven by the turbine. When the speed governor suddenly loses power, the control component 3 receives the power-off signal and closes the sealing valve plate 224. At this time, the regulating member reduces the volume of the oil storage chamber 221, so that the silicone oil in the oil storage chamber 221 is squeezed out from the oil outlet 222. The silicone oil that enters between the active disk 21 and the rotating shell 22 is affected by the rotating active disk 21 and moves accordingly. Due to the high friction coefficient of silicone oil and the strong adsorption force between silicone oils, the moving silicone oil continues to bring out the silicone oil in the oil storage chamber 221 and also enters the oil return port 223 due to centrifugal force. With the change of the sealing valve plate 224, the process of oil discharge and oil return is constantly in a new balance. The higher the speed of the active disk 21, the greater the centrifugal force on the silicone oil, and the more it fills the space between the active disk 21 and the rotating shell 22. The more silicone oil there is between the two disks, the greater the friction force on the rotating shell 22. The rotating shell 22 is braked by the friction disk 23 until the force of the silicone oil on the rotating shell 22 is greater than the maximum static friction between the rotating shell 22 and the friction disk 23. At this time, the rotating shell 22 rotates slowly. In this process, since the active disk 21 and the rotating shell 22 are non-rigidly connected, the turbine deceleration is relatively slow, and the deceleration force can be changed with the speed of the turbine to keep the speed of the turbine within a safe range, effectively avoiding damage to the turbine and the speed governor due to excessive speed or sudden braking of the turbine; when the speed governor restores power, the control component 3 controls the sealing valve plate 224 to close, and the silicone oil returns to the oil storage chamber 221 from the return oil port 223.

[0032] Reference Figure 2The control assembly 3 includes an electromagnet 31 and a torsion spring 32 fixed to the rotating shell 22. The electromagnet 31 is electrically connected to the speed regulator. One end of the torsion spring 32 is fixed to the sealing valve plate 224. The electromagnet 31 faces the sealing valve plate 224. The sealing valve plate 224 is ferromagnetic. When the electromagnet 31 is energized, the magnetic force exerted by the electromagnet 31 on the sealing valve plate 224 is greater than the elastic force of the torsion spring 32. When the electromagnet 31 is not energized, the torsion spring 32 is in a free state and the sealing valve plate 224 does not seal the oil outlet 222. When the speed regulator loses power, the electromagnet 31 receives the power-off signal of the speed regulator and changes its magnetic force in real time. At this time, the sealing valve plate 224 opens under the action of the torsion spring 32, allowing silicone oil to flow out of the oil outlet 222. When the speed regulator restores power, the magnetic force of the electromagnet 31 causes the sealing valve plate 224 to break free from the elastic force of the torsion spring 32 and close again. The structure is simple and the stability is high.

[0033] Reference Figure 2 The regulating parts are a plurality of regulating rods 41 arranged in the oil storage chamber 221. The oil storage chamber 221 is provided with regulating slots 42 adapted to the regulating rods 41. The regulating rods 41 are elastically inserted into the regulating slots 42. The regulating rods 41 are ferromagnetic and face the electromagnet 31. When the electromagnet 31 is powered off, the regulating rods 41 move toward the active disk 21. When the speed regulator loses power, the magnetic force exerted by the electromagnet 31 on the regulating rods 41 disappears. At this time, the regulating rods 41 are elastically moved toward the active disk 21 into the oil storage chamber 221, thereby reducing the oil storage space of the oil storage chamber 221. When the speed regulator restores power, the electromagnet 31 sucks the dust from the regulating rods 41 back into the regulating slots 42.

[0034] Reference Figure 2 The end surfaces of the active disk 21 and the rotating shell 22 that are close to each other are staggered with friction grooves 5. The staggered friction grooves 5 increase the contact area of ​​the silicone oil, thereby improving the effect of the silicone oil in transferring energy; the sealing valve plate 224 is provided with an air vent that only allows gas to pass through (the air vent is too small and is not shown in the accompanying drawings). When the speed regulator restores power, the sealing valve plate 224 is closed, and the silicone oil continues to move to the oil return port 223 under the influence of centrifugal force, and finally enters the oil storage chamber 221. The air vent maintains the air pressure on both sides of the sealing valve plate 224, thereby allowing the silicone oil to flow back to the oil storage chamber 221 more smoothly.

[0035] Reference Figure 1The driving disk 21 is drivingly connected to a generator 61, which is electrically connected to a UPS 62. The UPS 62 is also electrically connected to the speed regulator. Because the driving disk 21 is always drivingly connected to the turbine, the generator 61 connected to the driving disk 21 generates electricity as the turbine rotates. This electricity is then supplied to the UPS 62, keeping it fully charged. If the speed regulator loses power, the UPS 62 will promptly provide a temporary charge to ensure normal operation. The dual protection provided by the UPS 62, coupled with the rotating disk and rotating housing 22, effectively ensures the safety of the turbine unit.

[0036] Reference Figure 2 The generator 61 is electrically connected to a color-changing lamp 611. The light emitted by the color-changing lamp 611 can change according to the current generated by the generator 61. The current of the generator 61 is mainly affected by the rotation speed of the active disk 21, and the rotation speed of the active disk 21 corresponds to the rotation speed of the turbine. It is convenient for the staff to judge the rotation speed of the turbine by judging the color of the light of the color-changing lamp 611.

[0037] The implementation principle of the power failure monitoring and protection device for a turbine governor in the embodiment of the present application is as follows: the active disk 21 is driven by the turbine. When the governor suddenly loses power, the electromagnet 31 also loses power and loses its magnetic force. At this time, the sealing valve plate 224 opens under the action of the torsion spring 32, thereby allowing the silicone oil to flow out from the oil outlet 222. The silicone oil that enters between the active disk 21 and the rotating shell 22 is affected by the rotating active disk 21 and moves accordingly. Due to the high friction coefficient of silicone oil and the strong adsorption force between silicone oils, the moving silicone oil continues to bring out the silicone oil in the oil storage chamber 221 and also enters the oil return port 223 due to centrifugal force. As the sealing valve plate 224 changes, the oil discharge and return processes are constantly in a new balance. During this process, since the active disc 21 and the rotating shell 22 are non-rigidly connected, the turbine deceleration is relatively gentle, and the deceleration force can be changed with the speed of the turbine to keep the speed of the turbine within a safe range, effectively avoiding damage to the turbine and the speed governor due to excessive speed or sudden braking of the turbine; at the same time, UPS62 temporarily charges the speed governor in time. If the speed governor cannot receive the power supply of UPS62 due to an accident, the electromagnet 31 continues to perform the task of controlling the flow of silicone oil.

[0038] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A turbine speed governor power failure monitoring and protection device, characterized by: The invention comprises a machine body (1), wherein a driving disc (21) and a rotating shell (22) are rotatably connected to the machine body (1), the rotating shell (22) wraps around but does not contact the driving disc (21), the driving disc (21) is transmission-connected to the turbine, and a friction disc (23) is fixed to the machine body (1) and is in tight contact with the rotating shell (22); An oil storage chamber (221) containing silicone oil is provided on the rotating shell (22), an oil outlet (222) communicating with the oil storage chamber (221) is provided on the rotating shell (22) near its rotation axis, and an oil return port (223) communicating with the oil storage chamber (221) is provided on the rotating shell (22) away from its rotation axis. A sealing valve plate (224) is hingedly connected to the oil outlet (222) of the rotating shell (22). A control component (3) for controlling the opening and closing of the sealing valve plate (224) according to the circuit state of the speed regulator is provided on the body (1), and when the speed regulator loses power, the sealing valve plate (224) opens. An adjusting member for adjusting the volume of the oil storage chamber (221) is provided in the rotating shell (22).

2. The device for monitoring and protecting a turbine speed governor against power failure according to claim 1, characterized in that: The control assembly (3) includes an electromagnet (31) and a torsion spring (32) fixedly connected to the rotating shell (22), the electromagnet (31) is electrically connected to the speed regulator, one end of the torsion spring (32) is fixedly connected to the sealing valve plate (224), the electromagnet (31) is directly opposite to the sealing valve plate (224), and the sealing valve plate (224) has ferromagnetism. When the electromagnet (31) is energized, the magnetic force of the electromagnet (31) acting on the sealing valve plate (224) is greater than the elastic force of the torsion spring (32); when the electromagnet (31) is not energized, the torsion spring (32) is in a free state and the sealing valve plate (224) does not seal the oil outlet (222).

3. The device for monitoring and protecting a turbine speed governor against power failure according to claim 2, characterized in that: The adjusting members are a plurality of adjusting rods (41) arranged in the oil storage cavity (221). An adjusting slot (42) adapted to the adjusting rod (41) is provided in the oil storage cavity (221). The adjusting rod (41) is elastically inserted into the adjusting slot (42). The adjusting rod (41) is ferromagnetic and faces the electromagnet (31). When the electromagnet (31) is powered off, the adjusting rod (41) moves toward the active disk (21).

4. The hydro turbine governor power failure monitoring and protection device according to claim 1, characterized in that: Friction grooves (5) are staggeredly provided on the end surfaces of the active disk (21) and the rotating shell (22) that are close to each other.

5. The device for monitoring and protecting a turbine speed governor against power failure according to claim 1, characterized in that: The sealing valve plate (224) is provided with a vent hole that only allows gas to pass through.

6. The device for monitoring and protecting a turbine speed governor against power failure according to claim 1, characterized in that: The active disk (21) is drivingly connected to a generator (61), the generator (61) is electrically connected to a UPS (62), and the UPS (62) is also electrically connected to a speed regulator.

7. The device for monitoring and protecting a turbine speed governor against power failure according to claim 6, characterized in that: The generator (61) is electrically connected to a color-changing lamp (611).

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