Auxiliary support device for control ring of tubular turbine

Abstract

The present application relates to the technical field of tubular turbine, and discloses a kind of tubular turbine control ring auxiliary support device, including hanger, the lower part of the hanger is bent part, the bent part is equipped with self-lubricating wear pad and support block, the self-lubricating wear pad is fixedly connected above support block, the upper part of the hanger is equipped with fixed mechanism;The fixed mechanism is used to connect the side wall of outer guide ring, and the self-lubricating wear pad is used to support the outer circle connected on the bottom of control ring.Effectively solve the problem that the income of power station is affected by frequently replacing steel ball and repairing sliding chute.

Description

Technical Field

[0001] This invention relates to the field of axial-flow turbine technology, and more specifically to an auxiliary support device for the control ring of an axial-flow turbine. Background Technology

[0002] During operation, the flow rate of a axial-flow turbine needs to be adjusted by changing the guide vane opening to ensure that the runner operates in a high-efficiency range, as the water head changes. The adjustment of the guide vane opening is operated by a control loop. When the control loop operates the guide vane switch, the relative movement between the control loop and the outer guide ring of the water guiding mechanism is achieved by the rolling of steel balls filled in the chute to achieve a certain angle of reciprocating rotation.

[0003] Chinese patent document CN211598902U discloses a pop-up hole structure for the control ring of the water guide mechanism of a water turbine. The outer ring surface of the outer guide ring of the water guide mechanism is provided with a bearing groove. The control ring of the water guide mechanism is located on the outer side of the outer guide ring. A steel ball is provided in the bearing groove. The control ring is rotatably connected to the outer guide ring through the steel ball.

[0004] The existing technology has the following shortcomings: Because the size of the cross-flow turbine is generally large, the control ring is sleeved on the outer guide ring, and steel balls are set between the control ring and the outer guide ring. The control ring is heavy and is arranged with a horizontal shaft. After the unit has been running for a period of time, the control ring and the outer guide ring will reciprocate at a small angle. The load capacity of the upper steel ball is always greater than that of the lower steel ball. Due to the weight of the control ring, the wear of the upper steel ball in the chute is greater than that of the lower steel ball, which causes the center of gravity of the control ring to shift downward. This causes the water guiding mechanism to be difficult to operate or to jam, requiring frequent replacement of steel balls and repair of the chute. Summary of the Invention

[0005] To address the technical problems of frequent steel ball replacement and slide groove repair, this invention provides an auxiliary support device for the control ring of a axial-flow turbine. The device comprises a bracket with a bent lower portion. A self-lubricating anti-wear pad and a support block are mounted on the bent portion. The self-lubricating anti-wear pad is fixedly connected above the support block. A fixing mechanism is provided on the upper part of the bracket. The fixing mechanism is used to connect to the side wall of the outer guide ring, and the self-lubricating anti-wear pad is used to support the outer circle at the bottom of the control ring.

[0006] Preferably, the bracket has an L-shaped structure.

[0007] To prevent the control ring from rotating improperly due to rigid contact between the control ring and the support block, a rubber pad is provided between the support block and the bent portion.

[0008] To facilitate adjustment of the installation height, an adjustment shim is provided between the support block and the bending part.

[0009] To improve load-bearing capacity, the bending part, support block, rubber pad, and adjusting shim are fixedly connected as a whole.

[0010] Preferably, the fixing mechanism includes a bolt and a nut, the upper part of the bracket is provided with a mounting hole, the bolt is fixed in the mounting hole by the nut, and the bolt is used to fix the outer guide ring.

[0011] To facilitate quick installation, the upper part of the bracket is provided with a positioning pin, which is used to cooperate with the outer guide ring for positioning.

[0012] The present invention has the following beneficial effects: 1. By using a bracket to support the control ring, the force difference between the upper and lower steel balls is reduced, thereby extending the service life of the steel balls and preventing the center of gravity of the control ring from shifting downwards, which would affect the normal operation of the water guiding mechanism. The control ring and the self-lubricating anti-wear pad can slide relative to each other, avoiding uneven wear of the steel balls without affecting the operation of the water guiding mechanism. This provides support and effectively solves the problem of power plant revenue being affected by frequent replacement of steel balls and repair of the chute. Attached Figure Description

[0013] Figure 1 A schematic diagram of an embodiment of an auxiliary support device for the control ring of a axial-flow turbine. Figure 2 This is a schematic diagram of the installation structure of the auxiliary support device for the control ring of a cross-flow turbine. Detailed Implementation

[0014] The following detailed description illustrates the specific implementation method: 1. The reference numerals in the accompanying drawings of the instruction manual include: 1. Hanger; 2. Bend; 3. Self-lubricating anti-wear pad; 4. Support block; 5. Outer guide ring; 6. Control ring; 7. Rubber pad; 8. Adjusting shim; 9. Fixing bolt; 10. Bolt; 11. Nut; 12. Positioning pin; 13. Slide groove; 14. Steel ball.

[0015] Example 1 like Figure 1-2 As shown, an auxiliary support device for the control ring of a cross-flow turbine includes an L-shaped bracket 1. The lower part of the bracket 1 is a bent part 2 with a right angle. A self-lubricating anti-wear pad 3 and a support block 4 are provided on the bent part 2. The self-lubricating anti-wear pad 3 is fixedly connected above the support block 4. A fixing mechanism is provided on the upper part of the bracket 1. The fixing mechanism is used to connect to the side wall of the outer guide ring 5. The self-lubricating anti-wear pad 3 is used to support the outer circle at the bottom of the control ring 6.

[0016] A rubber pad 7 and an adjusting shim 8 are provided between the support block 4 and the bending part 2. The bending part 2, the support block 4, the rubber pad 7 and the adjusting shim 8 are connected as one unit by a fixing bolt 9.

[0017] The fixing mechanism includes a bolt 10 and a nut 11. The upper part of the bracket 1 is provided with a mounting hole. The bolt 10 is fixed in the mounting hole by the nut 11. The bolt 10 is used to fix the outer guide ring 5.

[0018] The upper part of the bracket 1 is also provided with a positioning pin 12, which is used to cooperate with the outer guide ring 5 for positioning.

[0019] When the control ring 6 moves relative to the outer guide ring 5, it rotates by the rolling of steel balls 14 filled in the groove 13, similar to a bearing structure. The control ring 6 is heavy, and after the unit has been running for a period of time, due to the weight of the control ring 6, the upper steel balls 14 in the groove 13 experience greater force than the lower steel balls 14 (the steel balls in the attached figure are the lower steel balls 14), resulting in uneven wear. This causes the center of gravity of the control ring 6 to shift downward, and the lower part of the outer circle of the control ring 6 is supported by the self-lubricating anti-wear pad 3. Under the action of the supporting force, the force difference between the upper and lower steel balls 14 is reduced, thereby extending the service life of the steel balls 14.

[0020] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An auxiliary support device for the control ring of a axial-flow turbine, characterized in that: The device includes a hanger (1), the lower part of which is a bent part (2), and the bent part (2) is provided with a self-lubricating anti-wear pad (3) and a support block (4). The self-lubricating anti-wear pad (3) is fixedly connected above the support block (4). The upper part of the hanger (1) is provided with a fixing mechanism. The fixing mechanism is used to connect the side wall of the outer guide ring (5). The self-lubricating anti-wear pad (3) is used to support the outer circle at the bottom of the control ring (6). The hanger (1) has an L-shaped structure. The upper part of the hanger (1) is provided with a positioning pin (12). The positioning pin (12) is used to cooperate with the outer guide ring (5) for positioning.

2. The auxiliary support device for the control ring of a axial-flow turbine according to claim 1, characterized in that: A rubber pad (7) is provided between the support block (4) and the bending part (2).

3. The auxiliary support device for the control ring of a axial-flow turbine according to claim 2, characterized in that: An adjusting shim (8) is provided between the support block (4) and the bending part (2).

4. The auxiliary support device for the control ring of a axial-flow turbine according to claim 3, characterized in that: The bending part (2), support block (4), rubber pad (7) and adjusting shim (8) are fixedly connected as one unit.

5. The auxiliary support device for the control ring of a axial-flow turbine according to claim 3 or 4, characterized in that: The fixing mechanism includes a bolt (10) and a nut (11). The upper part of the bracket (1) is provided with a mounting hole. The bolt (10) is fixed in the mounting hole by the nut (11). The bolt (10) is used to fix the outer guide ring (5).

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