Three-machine type pumped storage pump brake

Abstract

The utility model discloses a three-machine type pumped storage pump brake which comprises brake arms, the number of the brake arms is two, a fixing pin shaft is installed at the connecting position of the two brake arms, a hinged fork head is installed at the end, back to the fixing pin shaft, of each brake arm, two second connecting rods are installed in the hinged fork head, and the two second connecting rods are connected with the fixing pin shaft. A first connecting rod is connected between the two second connecting rods. The brake device has the advantages that through the design of the brake arms, the brake shoes, the hinged fork head, the first connecting rod, the second connecting rod and the brake handle, when a three-machine type structure in a small pumped storage power station works, the brake arms can be close to one another under the action of the first connecting rod, the second connecting rod and the hinged fork head by shifting the brake handle; therefore, quick on-demand braking of the water turbine and the water pump is achieved, mutual hindering of the water pump and the water turbine during starting is avoided, and the working efficiency of the small pumped storage power station is higher.

Description

Technical Field

[0001] This utility model relates to the field of pumped storage pump braking technology, specifically to a three-machine pumped storage pump brake. Background Technology

[0002] Against the backdrop of peak carbon emissions and carbon neutrality, small and medium-sized pumped storage hydropower units with an installed capacity of less than 300,000 kilowatts are highly anticipated, and their development, research, and engineering construction are currently proceeding at full speed. Because small pumped storage units have small water volumes and low heads, selecting a two-unit structure (pump and turbine) presents significant challenges.

[0003] To address this issue, some small pumped-storage power stations have adopted a three-unit structure, separating the pump, turbine, and generator motor. This three-unit structure separates the power generation and pumping operations, with the turbine and pump operating independently. However, the pump and turbine rotate in opposite directions, necessitating the shutdown of the turbine when the pump starts. Since the turbine will continue running as long as there is even a small amount of water in its piping, it cannot be stopped. Therefore, a three-unit pumped-storage pump brake is urgently needed to brake the turbine. Utility Model Content

[0004] (1) Technical issues to be resolved

[0005] The technical problem to be solved by this utility model is to provide a three-machine pumped storage pump brake in light of the current state of the technology.

[0006] (2) Technical solution

[0007] This utility model is achieved through the following technical solution: This utility model proposes a three-machine pumped storage pump brake, including two brake arms. A fixed pin is installed at the connection part of the two brake arms. A hinged fork is installed at the end of the brake arm opposite to the fixed pin. A connecting rod two is installed inside the hinged fork. A connecting rod one is connected between the two connecting rods two. A support is installed on the lower side of the connection part between the connecting rod one and the connecting rod two. A connecting fork is connected to the end of the connecting rod one opposite to the support. A brake handle is connected to the top of the connecting fork. A bracket is connected to the lower side of the connecting fork. A brake shoe is installed on the upper side of the inner side of each brake arm. An asbestos brake plate is installed on the inner wall of the brake shoe.

[0008] Furthermore, the bracket is rotatably connected to the bottom end of the brake handle, and the brake handle is hinged to one end of the connecting fork.

[0009] By adopting the above technical solution, the rotational connection makes it more convenient to rotate and adjust the brake handle relative to the bracket, and the hinged connection allows the connecting fork to rotate conveniently relative to the brake handle, so as to facilitate the adjustment of the brake handle.

[0010] Furthermore, the connecting fork is a double-ended connector, with the end of the connecting fork facing away from the brake handle hinged to the connecting rod.

[0011] By adopting the above technical solution, the connecting fork head is mainly used to transmit the pulling force generated when the brake handle is rotated to the first connecting rod, so as to realize the convenient pulling of the first connecting rod.

[0012] Furthermore, the end of the first connecting rod facing away from the connecting fork head is rotatably connected to both of the second connecting rods.

[0013] By adopting the above technical solution, the connection between the first link and the second link can be rotated and fitted, ensuring convenient rotational adjustment of the first link relative to the second link.

[0014] Furthermore, the end of the second connecting rod opposite to the first connecting rod is hinged to the corresponding hinged fork.

[0015] By adopting the above technical solution, the second connecting rod rotates relative to the support while driving the articulated fork heads to move closer to each other.

[0016] Furthermore, one end of the hinged fork is rotatably connected to the brake arm, and the brake arm has an arc-shaped structure.

[0017] By adopting the above technical solution, the two articulated forks will cause the brake arm to rotate around the fixed pin as they approach each other, so as to brake the water pump while the two brake arms rotate and approach each other.

[0018] Furthermore, the fixing pin passes through the connection portion of the two brake arms and is rotatably connected to the two brake arms.

[0019] By adopting the above technical solution, the fixed pin can be adjusted for normal rotation between the two brake arms.

[0020] Furthermore, the brake shoe is bolted to the brake arm, and the asbestos brake plate is bolted to the brake shoe.

[0021] By adopting the above technical solution, the asbestos brake plate can prevent damage to the corresponding shaft components during braking.

[0022] (3) Beneficial effects

[0023] Compared with the prior art, this utility model has the following advantages:

[0024] To address the difficulty in selecting a two-machine structure (pump and turbine) for some small pumped storage power stations, a three-machine structure (pump, turbine, and generator motor) is adopted, separating the pump, turbine, and generator motor. In this three-machine structure, the turbine and pump operate independently, but their rotation directions are opposite. Therefore, the turbine needs to be stopped when the pump starts. Since the turbine will continue to run as long as there is even a little water in its piping, it cannot be stopped. This invention addresses this issue by designing a brake arm, brake shoe, articulated fork, connecting rod one, connecting rod two, and brake handle. This allows for rapid, on-demand braking of both the turbine and pump when the three-machine structure in a small pumped storage power station is in operation. By moving the brake handle, the brake arm is brought closer together by connecting rod one, connecting rod two, and the articulated fork, thus preventing mutual obstruction during startup and improving the efficiency of the small pumped storage power station. Attached Figure Description

[0025] Figure 1 This is a front view of a three-machine pumped storage pump brake according to the present invention;

[0026] Figure 2 This is a top view of a three-machine pumped storage pump brake according to the present invention;

[0027] Figure 3 This is a top view of the brake arm in a three-machine pumped storage pump brake according to the present invention;

[0028] Figure 4 This is a top view of the brake shoe in a three-machine pumped storage pump brake according to the present invention;

[0029] Figure 5 This is a top view of the brake handle in a three-machine pumped storage pump brake as described in this utility model.

[0030] The following are the descriptions of the reference numerals:

[0031] 1. Brake handle; 2. Connecting fork; 3. Bracket; 4. Support; 5. Fixing pin; 6. Linkage 1; 7. Brake arm; 8. Brake shoe; 9. Hinge fork; 10. Linkage 2; 11. Asbestos brake plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0033] like Figure 1-Figure 5 As shown, a three-unit pumped storage pump brake in this embodiment includes two brake arms 7. A fixing pin 5 is installed at the connection point of the two brake arms 7. A hinged fork 9 is installed at the end of the brake arm 7 facing away from the fixing pin 5. A connecting rod 10 is installed inside the hinged fork 9. There are two connecting rods 10, and a connecting rod 6 connects the two connecting rods 10. A support 4 is installed on the lower side of the connection point between the connecting rod 16 and the connecting rod 10. A connecting fork 2 is connected to the end of the connecting rod 16 facing away from the support 4. A brake handle 1 is connected to the top of the connecting fork 2, and a bracket 3 is connected to the lower side of the connecting fork 2. Each... Each brake arm 7 has a brake shoe 8 installed on its upper inner side. An asbestos brake plate 11 is installed on the inner wall of the brake shoe 8. When braking the water turbine, the brake handle 1 is first rotated to the dead center position in the horizontal direction. During the rotation of the brake handle 1, the connecting fork head 2 and the connecting rod 6 will cause the two connecting rods 10 to rotate closer. While the connecting rods 10 rotate relative to the support 4, they will drive the hinge fork head 9 to move closer to each other. While the two hinge fork heads 9 move closer to each other, the brake arm 7 will rotate around the fixed pin 5 so that the water pump can be braked while the two brake arms 7 rotate closer.

[0034] like Figure 1-Figure 5 As shown, in this embodiment, the bracket 3 is rotatably connected to the bottom end of the brake handle 1, and the brake handle 1 is hinged to one end of the connecting fork 2. The rotatable connection makes it more convenient to adjust the brake handle 1 relative to the bracket 3. The hinged connection allows the connecting fork 2 to rotate conveniently relative to the brake handle 1, facilitating the adjustment of the brake handle 1. The connecting fork 2 is a double-ended connector. The end of the connecting fork 2 facing away from the brake handle 1 is hinged to the connecting rod 6. The connecting fork 2 is mainly used to transmit the pulling force generated when the brake handle 1 rotates to the connecting rod 6, so as to realize the convenient pulling of the connecting rod 6. The end of the connecting rod 6 facing away from the connecting fork 2 is rotatably connected to both connecting rods 10, so that the connection part of the connecting rod 6 and the connecting rod 10 rotates and cooperates, which can ensure the convenient rotation adjustment of the connecting rod 6 relative to the connecting rod 10.

[0035] like Figure 1-Figure 5 As shown, in this embodiment, the end of the second connecting rod 10 facing away from the first connecting rod 6 is hinged to the corresponding hinged fork 9. The end of the hinged fork 9 is rotatably connected to the brake arm 7. The brake arm 7 has an arc-shaped structure. The fixing pin 5 passes through the connection part of the two brake arms 7 and is rotatably connected to the two brake arms 7. The fixing pin 5 can be adjusted for normal rotation between the two brake arms 7. The brake shoe 8 is bolted to the brake arm 7. The asbestos brake plate 11 is bolted to the brake shoe 8. The asbestos brake plate 11 can prevent damage to the corresponding shaft during braking.

[0036] The specific implementation process of this embodiment is as follows: When starting the water pump in a three-machine pumped storage power station, the braking mechanism is first installed at the turbine axle. Then, the brake handle 1 is rotated clockwise to the horizontal dead center position. During the rotation of the brake handle 1, the connecting fork 2 and the connecting rod 1 6 will cause the two connecting rods 2 10 to rotate closer. While the connecting rods 2 10 rotate relative to the support 4, they will drive the hinged fork 9 to move closer to each other. While the two hinged forks 9 move closer to each other, the brake arm 7 will rotate around the fixed pin 5. After the asbestos brake plate 11 on the two brake arms 7 presses against the turbine axle, the turbine axle is braked, which facilitates the convenient start of the water pump. Similarly, this brake can also be used to brake the pump power shaft as needed, ensuring the convenient start of the turbine and making the working efficiency of the small pumped storage power station higher.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A brake for a three-unit pumped storage pump, characterized in that: The device includes two brake arms (7), with a fixed pin (5) installed at the connection between the two brake arms (7). A hinged fork (9) is installed at the end of the brake arm (7) facing away from the fixed pin (5). A connecting rod (10) is installed inside the hinged fork (9). There are two connecting rods (10), and a connecting rod (6) is connected between the two connecting rods (10). A support (4) is installed on the lower side of the connection between the connecting rod (6) and the connecting rod (10). A connecting fork (2) is connected to the end of the connecting rod (6) facing away from the support (4). A brake handle (1) is connected to the top of the connecting fork (2). A bracket (3) is connected to the lower side of the connecting fork (2). A brake shoe (8) is installed on the upper side of each brake arm (7), and an asbestos brake plate (11) is installed on the inner wall of the brake shoe (8).

2. The brake for a three-unit pumped storage pump according to claim 1, characterized in that: The bracket (3) is rotatably connected to the bottom end of the brake handle (1), and the brake handle (1) is hinged to one end of the connecting fork (2).

3. The brake for a three-unit pumped storage pump according to claim 2, characterized in that: The connecting fork (2) is a double-ended connector, and the end of the connecting fork (2) facing away from the brake handle (1) is hinged to the connecting rod (6).

4. The brake for a three-unit pumped storage pump according to claim 1, characterized in that: The first connecting rod (6) is rotatably connected to both connecting rods (10) at one end opposite to the connecting fork (2).

5. A three-unit pumped storage pump brake according to claim 1, characterized in that: The second link (10) is hinged to the corresponding hinged fork (9) at one end opposite to the first link (6).

6. The brake for a three-unit pumped storage pump according to claim 1, characterized in that: One end of the hinged fork (9) is rotatably connected to the brake arm (7), and the brake arm (7) has an arc-shaped structure.

7. A three-unit pumped storage pump brake according to claim 1, characterized in that: The fixed pin (5) passes through the connection part of the two brake arms (7) and is rotatably connected to the two brake arms (7).

8. A three-unit pumped storage pump brake according to claim 7, characterized in that: The brake shoe (8) is bolted to the brake arm (7), and the asbestos brake plate (11) is bolted to the brake shoe (8).

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