Anti-maloperation mechanism for brake air brake of hydraulic generator

Abstract

The invention relates to the technical field of water wheel power generation, and particularly discloses a water wheel generator braking air brake maloperation prevention mechanism which comprises a taking and conveying element, the taking and conveying element utilizes pressure difference or air flow to guide and convey high-pressure air flow, and the taking and conveying element comprises a plurality of collecting ports which are distributed in the side wall of a buffering element and used for calibrating the pressure difference; the buffer element is arranged at the end part of the taking and conveying element and is driven by the conveying pressure of the taking and conveying element to move; the taking and conveying element is installed at the end of the buffering element and used for closing or reducing the through-flow area of the air inlet pipeline, the taking and conveying element and the buffering element are arranged in a right-angle mode, and the taking and conveying element is of a pneumatic pressure taking structure. The situation that high-pressure gas instantly enters the air brake cavity due to the fact that the air inlet valve of the air brake lower cavity is accidentally opened is prevented, and therefore the situation that the air brake is jacked up to the braking position is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of hydro-turbine power generation, in particular to a hydraulic generator brake damper anti-malfunction mechanism. Background Art

[0002] As a crucial component of modern power systems, the safety and reliability of hydroelectric generators are crucial to ensuring the stable operation of the power grid. During hydroelectric generator operation, the braking system plays a crucial role. It not only assists in the safe shutdown of the unit but also enables rapid shutdown in emergencies to prevent potential accidents. The brake damper is a key component in achieving this function.

[0003] However, in practice, braking dampers present certain safety risks. Specifically, when a hydro-turbine generator set is operating at high speed, if the air intake valve in the damper's lower chamber accidentally opens, high-pressure gas may instantly enter the damper cavity, causing the damper to be "lifted" into the braking position. This unintended braking action not only causes wear and even damage to the damper itself, but can also damage the generator rotor, seriously affecting the equipment lifespan and power generation efficiency. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that if the air intake valve in the lower cavity of the damper is accidentally opened, high-pressure gas may instantly enter the damper cavity, causing the damper to be "lifted" to the braking position, causing wear or even damage to the damper itself.

[0005] The above technical problem is solved by the following technical solution: The present invention proposes a hydraulic generator brake damper anti-malfunction mechanism, which includes a pick-up and delivery element, which uses pressure difference or air flow to guide high-pressure airflow, wherein the pick-up and delivery element includes a plurality of collection ports distributed on the side wall of the buffer element for calibrating the pressure difference;

[0006] a buffer element, the buffer element being disposed at an end of the pick-up and delivery element and being driven to move by the pressure delivered by the pick-up and delivery element; and

[0007] The intercepting element is installed at the end of the buffer element and is used to close or reduce the flow area of ​​the intake pipe.

[0008] In a preferred embodiment of the hydraulic generator brake damper anti-malfunction mechanism of the present invention: the pick-up and delivery element and the buffer element are arranged at a right angle thereto, wherein the pick-up and delivery element adopts a pneumatic pressure-taking structure.

[0009] In a preferred embodiment of the hydraulic generator brake damper anti-malfunction mechanism of the present invention: the outer wall of the buffer element is connected to the damper housing.

[0010] In a preferred embodiment of the hydraulic generator brake damper anti-maloperation mechanism of the present invention: the taking-and-delivering element includes a directional pipeline, the top of the directional pipeline is equipped with a pressure port, and the pressure port is arranged in the unit rotation area of ​​the hydraulic generator.

[0011] In a preferred embodiment of the anti-malfunction mechanism of the hydraulic generator brake damper of the present invention: the end of the directional pipeline away from the pressure taking port is connected to the buffer element, and the connection between the directional pipeline and the buffer element is sealed by a seal.

[0012] In a preferred embodiment of the hydraulic generator brake damper anti-malfunction mechanism of the present invention: the pressure taking port is arranged in a trumpet shape, and the directional pipeline is arranged in an L-shape in the front view.

[0013] In a preferred embodiment of the hydraulic generator brake damper anti-maloperation mechanism of the present invention: the buffer element includes a shell arranged at the end of the directional pipeline, a piston cavity is arranged inside the shell, and a piston body is arranged inside the piston cavity.

[0014] In a preferred embodiment of the hydraulic generator brake damper anti-malfunction mechanism of the present invention: a connecting rod is installed at the end of the piston body, and the piston body is connected to the damper through the connecting rod.

[0015] In a preferred embodiment of the hydraulic generator brake damper anti-malfunction mechanism of the present invention: the connecting rod of the damper away from the end of the connecting rod passes through the housing and is connected to the valve block, and the side wall of the connecting rod is provided with a spring.

[0016] In a preferred embodiment of the anti-maloperation mechanism of the hydro-turbine generator brake damper of the present invention: an air intake pipe for the lower cavity of the damper is installed at the end of the outer shell, and one end of the valve block extends into the interior of the air intake pipe of the lower cavity of the damper, wherein the diameter of the valve block is larger than the diameter of the internal cavity of the air intake pipe of the lower cavity of the damper.

[0017] The beneficial effect of this invention is that, by regulating the airflow entering the damper cavity, air intake is allowed to perform normal braking only under predetermined safety conditions. This not only protects the damper itself from damage, but also avoids potential threats to key components such as the generator rotor caused by accidental braking.

[0018] By effectively preventing unintended damper braking, unnecessary wear and tear on the damper is significantly reduced. This design ensures the damper only activates its braking function when needed, extending its service life, reducing maintenance costs and downtime, and improving the overall economic efficiency of the equipment. The interconnected directional piping design enhances the system's sensitivity and responsiveness to pressure changes, enabling immediate detection of any anomalies and prompt corrective action. This means the system can react quickly, preventing any potential damper misoperation from becoming a problem. It also enables more precise control of the volume and timing of air intake into the damper's lower chamber. Even in extreme cases where an air intake channel experiences an anomaly, the interconnected design quickly adjusts and balances the pressure across all channels, ensuring that a single channel issue prevents the entire system from failing or malfunctioning. This effectively prevents the sudden intrusion of high-pressure gas into the damper chamber caused by the accidental opening of the damper's lower chamber intake valve, thereby preventing the damper from being "lifted" into the braking position. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them:

[0020] Figure 1 The overall structural diagram of the hydraulic generator brake damper anti-malfunction mechanism is shown;

[0021] Figure 2 The cross-sectional structure diagram of the hydraulic generator brake damper anti-malfunction mechanism is shown;

[0022] Figure 3 Shows a schematic diagram of the front view structure of several directional pipelines of the hydraulic generator brake damper anti-malfunction mechanism;

[0023] Figure 4 The diagram shows the three-dimensional structure of several directional pipelines of the hydraulic generator brake damper anti-malfunction mechanism;

[0024] Figure 5 The diagram shows several directional pipeline cross-sectional structural diagrams of the hydraulic generator brake damper anti-maloperation mechanism.

[0025] Figure 6 The diagram shows the interconnected structure of several directional pipelines of the anti-maloperation mechanism of the hydraulic generator brake damper. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0027] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0028] Reference Figure 1 This embodiment provides a mechanism for preventing misoperation of a brake damper of a hydro-turbine generator, including, by cleverly utilizing the dynamic characteristics of the unit itself (such as the pressure difference caused by the rotational speed), achieving effective control of the air intake in the lower cavity of the damper, thereby ensuring the safe operation of the hydro-turbine generator unit.

[0029] A pickup and delivery element 1 utilizes pressure differentials or airflow to guide high-pressure airflow. The pickup and delivery element 1 includes collection ports distributed along the sidewalls of the buffer element 2 to calibrate the pressure differential generated by the high-speed rotation of the unit. Through these collection ports, the pickup and delivery element 1 can effectively collect high-pressure gas from the rotating area (such as the rotor or the air duct outlet) and direct it to subsequent components.

[0030] Buffer element 2, which is located at the end of the pick-up and delivery element 1 and is driven to move by the pressure delivered by the pick-up and delivery element 1. Buffer element 2 is designed to absorb and regulate the high-pressure airflow from the pick-up and delivery element 1, ensuring that the action transmitted to the intercepting element 3 is both smooth and reliable. This can avoid malfunctions caused by pressure fluctuations, thereby improving the stability and response accuracy of the system; and

[0031] Interceptor 3, mounted at the end of buffer element 2, closes or reduces the flow area of ​​the intake duct. When the unit is operating at high speed, the pressure differential of pick-up and delivery element 1 drives buffer element 2 toward the closing direction, which in turn pushes interceptor 3 to reduce or completely close the intake passage, preventing accidental air intake from lifting the damper. Conversely, when the unit speed drops to a safe braking range, buffer element 2, under the action of the spring, moves back, driving interceptor 3 to open the intake passage, allowing the damper to perform its braking function normally.

[0032] Reference Figure 2 As an optional embodiment, the picking and delivering element 1 and the buffer element 2 are arranged at right angles to each other. This layout helps to optimize space utilization and ensure that the air flow path from the collection port to the piston chamber is as direct and efficient as possible. The picking and delivering element 1 adopts a pneumatic pressure-taking structure, which can effectively convert the airflow or pressure difference generated by high-speed rotation into power to promote the movement of the valve block.

[0033] The outer wall of the buffer element 2 is connected to the wind brake shell, which not only provides a stable support for the entire device, but also facilitates the accurate transmission of the collected pressure to subsequent components, ensuring the stability and reliability of the system.

[0034] The pick-up and delivery element 1 includes a directional pipeline 11, and a pressure port 12 is installed at the top of the directional pipeline 11, wherein the pressure port 12 is set in the rotation area of ​​the turbine generator 13 to capture the dynamic pressure or eddy pressure generated during high-speed operation.

[0035] The end of the directional pipeline 11 away from the pressure port 12 is connected to the buffer element 2, wherein the connection between the directional pipeline 11 and the buffer element 2 is sealed by a seal 14 to ensure that the high-pressure gas does not leak, thereby ensuring the effective operation of the system.

[0036] The pressure taking port 12 is arranged in a trumpet shape. Such a design can increase the air intake area and improve the collection efficiency, so that sufficient pressure signals can be obtained even at low speeds. At the same time, the directional pipeline 11 is arranged in an L-shape in the front view. This design not only helps to reduce the overall size, but also allows the airflow to enter the buffer element 2 more smoothly, reducing energy loss.

[0037] Reference Figure 1-Figure 2 As an optional embodiment, the buffer element 2 includes a shell 21 arranged at the end of the directional pipeline 11, a piston cavity 22 is provided inside the shell 21, and a piston body 23 is provided inside the piston cavity 22.

[0038] A connecting rod 24 is installed at the end of the piston body 23 , and the piston body 23 is connected to the damper 25 through the connecting rod 24 .

[0039] A connecting rod 29 at one end of the damper 25 away from the connecting rod 24 passes through the housing 21 and is connected to the valve block 26 . A spring 28 is sleeved on the side wall of the connecting rod 24 .

[0040] When the hydro-generator set is in a high-speed and normal operating state, the high-pressure gas captured by the pressure tapping 12 is transported to the buffer element 2 through the directional pipeline 11, thereby driving the piston body 23 to move, driving the valve block 26 to the "closed" or "reduced flow area" position, and preventing abnormal air intake into the air intake pipe 27 of the lower cavity of the damper. As the speed of the unit gradually decreases, the pneumatic pressure also decreases. The valve block 26 gradually retracts under the action of the reset force of the spring 28, reopening the air intake channel and allowing the damper to enter a normal braking working state. Through the above design, the present invention significantly improves the safety and stability of the hydro-generator set and effectively avoids wear or damage accidents caused by unexpected air intake.

[0041] Reference Figure 2In one embodiment provided in the present application, an air intake pipe 27 for the lower cavity of the damper is installed at the end of the housing 21. This pipe is directly connected to the lower cavity of the damper and is responsible for introducing or discharging the control gas into or out of the damper cavity. This design ensures that even in the event of an abnormal situation during high-speed operation, a rapid response can be achieved to avoid braking accidents caused by improper air intake. One end of the valve block 26 extends into the interior of the air intake pipe 27 for the lower cavity of the damper. This design allows the valve block 26 to directly control the on-off state of the air intake pipe, thereby achieving effective management of the air intake of the lower cavity of the damper. The diameter of the valve block 26 is larger than the diameter of the internal cavity of the air intake pipe 27 for the lower cavity of the damper. When the valve block 26 is in the closed position, due to its larger diameter, it can completely block the air intake channel, preventing any gas from entering the lower cavity of the damper, and ensuring that no accidental braking occurs when the unit is running at high speed.

[0042] When it is necessary to limit rather than completely block the gas flow, by adjusting the position of the valve block 26, the flow area of ​​the air inlet pipeline can be reduced to a certain extent, thereby finely adjusting the amount of gas entering the lower chamber of the damper.

[0043] The larger diameter of the valve block 26 helps to improve the sealing effect, reduce the possibility of gas leakage, and further enhance the reliability of the system.

[0044] It should be noted that the device collects high-pressure gas from the rotating area of ​​the unit on the hydro-generator 13 through the pressure port 12, which generates the airflow or pressure difference generated by the high-speed rotation, and transmits it to the directional pipeline 11, and then transports it to the inside of the piston cavity 22 through the directional pipeline 11. When the unit is in normal operation at high speed, it generates sufficient pneumatic pressure to overcome the spring force of the spring 28 and drive the piston body 23 to push the valve block to the "closed" or "reduced flow area" position, thereby cutting off or greatly suppressing the air intake of the air intake pipeline 27 of the lower cavity of the wind gate. When the piston body 23 moves, the damper 25 limits the movement speed of the piston to prevent excessive pressure from causing excessive movement speed. At the same time, the speed critical values ​​of "closing the valve" and "opening the valve" are accurately set. At this time, the wind gate will not be lifted up due to accidental air intake.

[0045] When the unit speed gradually decreases and meets the range for safe braking, the pneumatic pressure output by the centrifugal detection mechanism decreases, and the valve block 26 gradually retracts under the reset force of the spring 28, so that the air inlet pipe 27 of the lower cavity of the damper becomes unobstructed again, allowing the damper to enter the normal braking working state.

[0046] Reference Figure 4-Figure 5 In some embodiments, the pick-up and delivery element 1 of this embodiment, which is different from the above embodiments, includes a plurality of collection ports distributed on the side wall of the buffer element 2, which is used to calibrate the pressure difference generated by the high-speed rotation of the unit.

[0047] Multiple sampling ports are distributed along the sidewalls of buffer element 2, enabling more comprehensive and accurate capture of dynamic pressure changes generated by high-speed rotation of the unit. This multi-point collection, concentrated in converging chamber A, helps eliminate errors that may be introduced by a single sampling point, thereby providing a more accurate pressure signal.

[0048] Distributed pressure collection ports can more quickly detect pressure changes, enabling the system to react immediately. For example, if the unit speed suddenly changes or an abnormal situation occurs, the system can quickly adjust the position of the valve block 26 to ensure the status of the air intake pipe 27 in the lower chamber of the damper is updated in a timely manner, improving the response speed and stability of the entire braking system.

[0049] By setting up multiple collection ports at different locations, the pressure distribution entering the buffer element 2 from all directions can be better balanced and optimized. This not only helps reduce equipment wear caused by local high pressure, but also avoids the problem of unstable valve block operation caused by uneven pressure.

[0050] More accurate pressure differential calibration means the system can more reliably determine the unit's actual operating status and make correct operational decisions accordingly. Especially at high speeds, the system significantly enhances its ability to prevent accidental air intake from lifting the damper, effectively reducing the risk of equipment damage and improving overall safety and reliability.

[0051] This design also gives the system greater adaptability, ensuring excellent performance regardless of the type of turbine generator or complex operating conditions. The multi-point data collection port design allows the system to flexibly adjust the pressure sensing range according to actual needs, meeting diverse requirements.

[0052] In summary, by introducing multiple collection ports distributed on the side wall of the buffer element 2 into the picking and delivering element 1, the present invention not only improves the accuracy of pressure difference detection and the response speed of the system, but also enhances the stability and safety of the system, providing more reliable protection for the brake damper of the hydro-generator.

[0053] Reference Figure 6 In some embodiments, several directional pipelines 11 are arranged to be interconnected through a connecting pipe B.

[0054] The interconnected directional piping 11 design enables balanced pressure distribution across multiple collection ports. This design ensures that the pressure signal captured by any collection port is efficiently and evenly transmitted to the buffer element 2, avoiding delays or failures caused by excessively high or low pressure at a single point.

[0055] If a directional pipeline 11 becomes blocked or fails, the other interconnected pipelines can still maintain normal operation of the system, greatly improving the fault tolerance and reliability of the entire brake damper anti-trouble operation system. Even if some components fail, the system can still operate stably, reducing the safety risks caused by single failure points.

[0056] By rationally arranging multiple interconnected directional pipes 11, the airflow path can be optimized, reducing resistance and energy loss during gas transmission. This not only helps improve the overall performance of the system, but also extends the service life of related components.

[0057] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A hydraulic generator brake damper anti-malfunction mechanism, characterized by: include, A pick-up and delivery element (1), wherein the pick-up and delivery element (1) utilizes a pressure difference or an air flow to guide a high-pressure air flow, wherein the pick-up and delivery element (1) comprises a plurality of collection ports distributed on the side wall of the buffer element (2) for calibrating the pressure difference; A buffer element (2), the buffer element (2) being arranged at an end of the pick-up and delivery element (1) and being driven to move by the pressure delivered by the pick-up and delivery element (1); and A cutting element (3) is installed at the end of the buffer element (2) and is used to close or reduce the flow area of ​​the intake pipe.

2. The anti-malfunction mechanism of the hydraulic generator brake damper according to claim 1, characterized in that: The taking and delivering element (1) and the buffer element (2) are arranged at a right angle thereto, wherein the taking and delivering element (1) adopts a pneumatic pressure-taking structure.

3. The anti-malfunction mechanism of the hydraulic generator brake damper according to claim 2, characterized in that: The outer wall of the buffer element (2) is connected to the wind brake housing.

4. The anti-malfunction mechanism of the hydraulic generator brake damper according to claim 3, characterized in that: The delivery element (1) comprises a directional pipeline (11), the top end of which is provided with a pressure port (12), wherein the pressure port (12) is arranged in a unit rotation area of ​​a hydro-generator (13).

5. The anti-malfunction mechanism of the hydraulic generator brake damper according to claim 4, characterized in that: The end of the directional pipeline (11) away from the pressure port (12) is connected to the buffer element (2), wherein the connection between the directional pipeline (11) and the buffer element (2) is sealed by a sealing member (14).

6. The anti-malfunction mechanism of the hydraulic generator brake damper according to claim 5, characterized in that: The pressure taking port (12) is arranged in a trumpet shape, and the directional pipeline (11) is arranged in an L-shape in a front view.

7. The anti-malfunction mechanism of the hydraulic generator brake damper according to claim 6, characterized in that: The buffer element (2) comprises a shell (21) arranged at the end of a directional pipeline (11), a piston cavity (22) is arranged inside the shell (21), and a piston body (23) is arranged inside the piston cavity (22).

8. The anti-malfunction mechanism for the brake damper of a hydro-generator according to claim 7, characterized in that: A connecting rod (24) is installed at the end of the piston body (23), and the piston body (23) is connected to the damper (25) through the connecting rod (24).

9. The anti-malfunction mechanism for the brake damper of a hydro-generator according to claim 8, characterized in that: A connecting rod (29) at one end of the damper (25) away from the connecting rod (24) passes through the housing (21) and is connected to the valve block (26); a spring (28) is sleeved on the side wall of the connecting rod (24).

10. The anti-malfunction mechanism of the hydraulic generator brake damper according to claim 9, characterized in that: An air intake pipe (27) for the lower cavity of the damper is installed at the end of the housing (21), and one end of the valve block (26) extends into the interior of the air intake pipe (27) for the lower cavity of the damper, wherein the diameter of the valve block (26) is larger than the diameter of the internal cavity of the air intake pipe (27) for the lower cavity of the damper.

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