Water turbine governor oil pump inlet and outlet pipe structure

Abstract

The utility model belongs to the field of hydraulic engineering especially relates to water turbine governor oil pump inlet and outlet oil pipe structure, including oil inlet pipeline, oil outlet pipeline, first support damping component and second support damping component, and the both ends of oil inlet pipeline are connected respectively oil tank output end and oil pump input end, and the both ends of oil outlet pipeline are connected respectively oil tank input end and oil pump output end, and oil outlet pipeline includes first oil outlet pipe, and first oil outlet pipe connects oil pump output end, and first oil outlet pipe connects second support damping component, and the bottom of oil pump is equipped with first support damping component. The oil return pressure of pump instantaneous start / stop increases suddenly, and the vibration of oil outlet pipeline is transmitted to the damping of second support damping component. It also includes motor and support base, and the motor is arranged on the support base, and the output end of the motor is connected with the oil pump. During normal operation, the vibration of the motor drives the vibration of the oil pump shell, and the vibration of the oil pump shell is transmitted to the arc-shaped support frame. The vibration energy is converted through the power vibration absorber inside the support column, thereby inhibiting the vibration of the oil pump.

Description

Technical Field

[0001] This utility model belongs to the field of water conservancy engineering, and in particular relates to the structure of the oil pump inlet and outlet pipes of a water turbine governor. Background Technology

[0002] The turbine governor is one of the most important auxiliary control devices in a hydro-generator unit. Its operational quality directly determines the safe and stable operation of the unit. Reducing the failure rate of the turbine governor is the most effective way to improve the reliability of the unit's operation. The oil pump transmits pressurized oil through pipelines to the main guide vane system, the main blade system, and the auxiliary pressurized oil system. Through the main guide vane system and the main blade system, the opening degree of the guide vanes and blades is controlled, thereby achieving control of the unit.

[0003] In existing pipeline designs, it is usually as follows: Figure 1 As shown, the high-pressure oil outlet of the oil pump directly transmits pressurized oil to the guide vanes and impellers via a hose. The middle section of the pipeline returning to the oil pump via the return oil tank is connected by a single-sphere rubber joint. This pipeline design resulted in a pump shaft breakage during actual operation. Fault detection revealed that the oil pressure at the moment the pump stops impacts the hose. While the hose absorbs some of the impact, its connection to the pump causes it to vibrate, damaging the pump. The sudden increase in return oil pressure at start / stop generates a significant impact on the pump casing, increasing vibration and friction between the casing and driven screw, potentially causing the drive and driven impellers to seize. If not detected and addressed promptly, prolonged operation will lead to pump shaft fatigue and breakage. Furthermore, the elevation difference between the return oil tank and the pump, where the single-sphere rubber joint is insufficient to eliminate localized congestion, contributes to the vibration damage. In addition, when the motor is working, the motor vibration causes the oil pump to vibrate. Since the oil pump has no support, it relies entirely on the motor and the return oil tank to pull the oil pump at both ends, which causes the oil pump rotating shaft to fatigue and break.

[0004] Therefore, it is necessary to modify the existing pipelines to reduce the damage to the oil pump caused by vibration. Utility Model Content

[0005] The purpose of this invention is to provide a structure for the inlet and outlet oil pipes of the oil pump in a vibration-damping water turbine governor.

[0006] To achieve the aforementioned objectives, the technical solution adopted by this utility model is as follows:

[0007] The turbine governor oil pump inlet and outlet pipe structure includes an inlet pipe, an outlet pipe, a first support vibration damping component, and a second support vibration damping component. The inlet pipe is connected to the return oil tank output end and the oil pump input end at both ends, respectively. The outlet pipe is connected to the return oil tank input end and the oil pump output end at both ends, respectively. The outlet pipe includes a first outlet pipe, which is connected to the oil pump output end and the second support vibration damping component. The first support vibration damping component is provided at the bottom of the oil pump.

[0008] Furthermore, the second support and vibration damping component includes a collar, a vibration damper, and a support frame. The collar is sleeved on the first oil outlet pipe, the bottom of the collar is detachably connected to the vibration damper, and the vibration damper is provided on the top of the support frame.

[0009] Furthermore, the vibration damping component includes a connecting rod, a sleeve, and a sliding plate. The top of the connecting rod is detachably connected to the collar, the lower half of the connecting rod is located inside the sleeve, and the sliding plate is fixedly provided at the bottom of the sleeve. The sliding plate is slidably connected to the top of the support frame.

[0010] Furthermore, a limiting block is fixedly provided at the bottom of the connecting rod, a limiting ring is fixedly provided at the top of the collar, the limiting ring is slidably connected to the connecting rod, the limiting block is slidably connected to the inner wall of the sleeve, a spring is provided on the outer sleeve of the connecting rod, the spring is located between the limiting ring and the limiting block, a second spring is provided at the top of the sliding plate, and the other end of the second spring is connected to the bottom of the limiting block.

[0011] Furthermore, the top of the support frame is provided with a sliding cavity, and the sliding plate is slidably provided in the sliding cavity. Multiple springs are provided around the sliding plate, and the springs are connected to the inner wall of the sliding cavity. A limiting ring is provided at the top of the sliding cavity, and the limiting ring is fixedly connected to the support frame.

[0012] Furthermore, the first support vibration damping component includes an arc-shaped support frame, a support column, and a dynamic vibration absorber. The top of the arc-shaped support frame is detachably connected to the oil pump, and the bottom of the arc-shaped support frame is threadedly connected to the support column. The top of the support column is vertically provided with a receiving cavity, and the dynamic vibration absorber is provided in the receiving cavity. The dynamic vibration absorber is detachably connected to the bottom of the arc-shaped support frame.

[0013] Furthermore, the dynamic vibration absorber includes a rigid element, a damping element, and an inertial element. The damping element is sleeved on the inertial element, and the rigid element is detachably connected to the arc-shaped support frame and the inertial element at both ends.

[0014] Furthermore, the oil outlet pipeline also includes a second oil outlet pipe, which is connected to the input end of the return oil tank, and a flexible hose is provided between the second oil outlet pipe and the first oil outlet pipe.

[0015] Furthermore, the oil inlet pipeline includes a first oil inlet pipe and a second oil inlet pipe, and a metal hose is provided between the first oil inlet pipe and the second oil inlet pipe.

[0016] Furthermore, it also includes a motor and a support base, the output end of the motor is connected to the oil pump, and the top of the support base is provided with the motor, the first support damping component and the second support damping component.

[0017] The beneficial effects of this utility model are:

[0018] 1. The first and second oil inlet pipes are connected by a metal flexible hose, which eliminates the impact of the elevation difference between the return oil tank and the oil pump, and at the same time avoids the vibration of the oil outlet pipe from damaging the pipeline at the oil inlet pipe.

[0019] 2. The oil outlet pipeline uses a flexible hose connected to a rigid pipe (first oil outlet pipe and second oil outlet pipe) to avoid the impact force from the hose being too long when starting / stopping the pump being directly transmitted to the pump housing. The first oil outlet pipe and the second oil outlet pipe are connected by a flexible hose, which acts as a buffer to prevent the oil outlet pipeline from being twisted due to the pulling at both ends during vibration and thus causing damage. At the same time, a second support and vibration damping component is installed under the first oil outlet pipe. The vibration transmitted from the first oil outlet pipe and the flexible hose is reduced by the second support and vibration damping component to reduce the impact vibration caused by the return oil when the pump stops, thereby reducing the damage to the oil pump caused by vibration.

[0020] 3. When the motor is working, it will cause the oil pump housing to vibrate. The vibration of the oil pump housing is transmitted to the arc-shaped support frame, and then to the support column. The vibration energy is converted by the dynamic vibration absorber inside the support column, thereby suppressing the vibration of the oil pump and reducing the damage to the oil pump caused by vibration. Attached Figure Description

[0021] Figure 1 This is a diagram of the original speed controller's piping structure;

[0022] Figure 2 This is a diagram of the piping structure of the modified speed governor;

[0023] Figure 3 yes Figure 2 AA section view of the second support vibration damping component;

[0024] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5This is an exploded view of the first support vibration damping component. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0027] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] like Figure 1-5 As shown, the turbine governor oil pump inlet and outlet pipe structure includes an inlet pipe, an outlet pipe, a first support vibration damping component 9, and a second support vibration damping component 11. The inlet pipe is connected to the output end of the return oil tank 5 and the input end of the oil pump 1 at both ends. The outlet pipe is also connected to the input end of the return oil tank 5 and the output end of the oil pump 1 at both ends. The outlet pipe includes a first outlet pipe 2, which is connected to the output end of the oil pump 1 and the second support vibration damping component 11. The first support vibration damping component 9 is located at the bottom of the oil pump 1. During pump start-up / stop, the return oil pressure suddenly increases, causing vibration in the outlet pipe. This vibration is transmitted to the second support vibration damping component 11 for damping. It also includes a motor 12 and a support base 10. The motor 12 is mounted on the support base 10. The output end of the motor 12 is connected to the oil pump 1. During normal operation, the vibration of the motor 12 causes the housing of the oil pump 1 to vibrate. The vibration of the housing of the oil pump 1 is transmitted to the arc-shaped support frame 901, and then to the support column 902 via the arc-shaped support frame 901. The vibration energy is converted by the dynamic vibration absorber inside the support column 902, thereby suppressing the vibration of the oil pump 1.

[0029] like Figure 2-3As shown, the second support and vibration damping component 11 includes a collar 1101, a vibration damping element, and a support frame 1102. The collar 1101 is sleeved on the first oil outlet pipe 2. The collar 1101 can be fixed to the first oil outlet pipe 2 by clamping two semi-circular rings with screws. The bottom of the collar 1101 is detachably connected to the vibration damping element. The top of the support frame 1102 is provided with a vibration damping element. The vibration damping element includes a connecting rod 1104, a sleeve 1108, and a sliding plate 1111. The top of the connecting rod 1104 is detachably connected to the collar 1101, and the two are fixed together by multiple pins 1103. The lower half of the connecting rod 1104 is located inside the sleeve 1108. The bottom of the sleeve 1108 is fixedly provided with a sliding plate 1111. The top of the support frame 1102 is provided with a sliding cavity 1112. The sliding plate 1111 is slidably provided in the sliding cavity 1112. Multiple springs 1113 are provided around the sliding plate 1111, and the springs 1113 are connected to the sliding cavity 1112. The inner wall of the sliding cavity 1112 is provided with a limiting ring 1110 at the top. The limiting ring 1110 is fixedly connected to the support frame 1102. The aperture of the limiting ring 1110 is smaller than that of the sliding plate 1111. The limiting ring 1110 restricts the movement of the sliding plate 1111 in the vertical direction. The sliding plate 1111 can move horizontally in the sliding cavity 1112. The vibration amplitude in the horizontal direction is reduced by the spring 1113. There is friction between the sliding plate 1111 and the sliding cavity 1112. When there is relative displacement, heat is generated by friction, thereby converting energy and reducing the impact of horizontal vibration. A limiting block 1107 is fixedly provided at the bottom of the connecting rod 1104, and a limiting ring 1105 is fixedly provided at the top of the collar 1101. The limiting ring 1105 is slidably connected to the connecting rod 1104, and the limiting block 1107 is slidably connected to the inner wall of the sleeve 1108. A spring 1106 is provided on the outer sleeve of the connecting rod 1104. The spring 1106 is located between the limiting ring 1105 and the limiting block 1107, and the two restrict the spring 1106 from popping out from both sides. A spring 2 1109 is provided at the top of the sliding plate 1111. The other end of the spring 2 1109 is connected to the bottom of the limiting block 1107. The spring 1 1106 and the spring 2 1109 work together to reduce the vertical vibration transmitted from the oil outlet pipeline. The spring 1 1106 and the spring 2 1109 are always in a compressed state.

[0030] like Figure 2As shown, the oil outlet pipeline includes a first oil outlet pipe 2, which is connected to the output end of the oil pump 1 and a second support vibration damping component 11. The oil outlet pipeline also includes a second oil outlet pipe 4, which is connected to the input end of the return oil tank 5. A flexible hose 3 is provided between the second oil outlet pipe 4 and the first oil outlet pipe 2, and the flexible hose 3 is connected to both via a flange. When the oil pump 1 stops, the oil pressure will have a certain impact on the pipeline. The vibration of the first oil outlet pipe 2 is transmitted to the second support vibration damping component 11, which reduces the vibration of the first oil outlet pipe 2. The second oil outlet pipe 4 is fixedly connected to subsequent components, and the first oil outlet pipe 2 is rigidly connected to the oil pump 1. The flexible hose 3 acts as a buffer, absorbing part of the impact force and preventing damage to the oil outlet pipeline caused by twisting at both ends during vibration. The oil inlet pipeline includes a first oil inlet pipe 6 and a second oil inlet pipe 8, with a metal flexible hose 7 provided between the first oil inlet pipe 6 and the second oil inlet pipe 8, and the metal flexible hose 7 is connected to both via a flange. Because there is an elevation difference between the return oil tank 4 and the oil pump 1, a flexible connection is needed between the first oil inlet pipe 6 connected to the oil tank 4 and the second oil inlet pipe 8 connected to the oil pump 1 to compensate for the deflection. In this application, a metal hose 7 is preferred. Using a metal hose 7 can avoid the vibration from the oil pump 1 from damaging the pipeline at the oil inlet.

[0031] like Figure 5As shown, the first support and vibration damping component 9 includes an arc-shaped support frame 901, a support column 902, and a dynamic vibration absorber. The top of the arc-shaped support frame 901 is detachably connected to the oil pump 1, and the two can be connected by threads for easy disassembly / installation. The bottom of the arc-shaped support frame 901 is threadedly connected to the support column 902. The top of the support column 902 has a vertically arranged receiving cavity 903, and the dynamic vibration absorber is arranged inside the receiving cavity 903. The dynamic vibration absorber is detachably connected to the bottom of the arc-shaped support frame 901. The dynamic vibration absorber includes a rigid element 904, a damping element 905, and an inertial element 906. The damping element 905 is sleeved on the inertial element 906. The two ends of the rigid element 904 are detachably connected to the arc-shaped support frame 901 and the inertial element 906, and the rigid element 904 can be threaded to both ends. By replacing rigid elements 904 with different lengths, the stiffness of the rigid element 904 can be changed, thereby adjusting the natural frequency of the dynamic vibration absorber to match the vibration frequency of the oil pump 1 housing. Therefore, detachable connections are needed between the various components to accommodate multiple adjustments. The support column 902 and the support base 10 are also slidably connected, and the support base 10 has threaded holes, which can be used to thread the support column 902 for mutual fixation. By analyzing the mechanical properties of the oil pump 1 and the motor 12, the natural frequency, equivalent mass, damping ratio, and other dynamic parameters of the oil pump 1 during operation are obtained. The length of the rigid element 904 is adjusted to match the vibration frequency of the oil pump 1. The rigid element 904, damping element 905, and inertial element 906 in the dynamic vibration absorber can all be prismatic, cylindrical, etc. In this application, they are all cylindrical (the receiving cavity 903 adopts a suitable shape) to facilitate processing and increase the contact area between the damping element 905 and the receiving cavity 903, thereby achieving better energy conversion. The damping element 905 can be an elastic ring, such as rubber. During vibration, the damping element 905 moves axially on the outer periphery of the inertial element 906. The damping ratio can be adjusted by increasing or decreasing the number of damping elements 905 to achieve the best effect. The inertial element 906 has a larger mass than the rigid element 904 and the damping element 905.

[0032] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications, alterations, alterations, or substitutions made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. The structure of the oil pump inlet and outlet pipes of the turbine governor, characterized in that: It includes an oil inlet pipe, an oil outlet pipe, a first support and vibration damping component (9), and a second support and vibration damping component (11). The two ends of the oil inlet pipe are respectively connected to the output end of the return oil tank (5) and the input end of the oil pump (1). The two ends of the oil outlet pipe are respectively connected to the input end of the return oil tank (5) and the output end of the oil pump (1). The oil outlet pipe includes a first oil outlet pipe (2), which is connected to the output end of the oil pump (1) and the second support and vibration damping component (11). The first support and vibration damping component (9) is provided at the bottom of the oil pump (1).

2. The structure of the oil pump inlet and outlet pipes of the turbine governor according to claim 1, characterized in that: The second support and vibration damping component (11) includes a collar (1101), a vibration damper and a support frame (1102). The first oil outlet pipe (2) is fitted with the collar (1101). The bottom of the collar (1101) is detachably connected to the vibration damper. The top of the support frame (1102) is fitted with the vibration damper.

3. The structure of the oil pump inlet and outlet pipes of the turbine governor according to claim 2, characterized in that: The vibration damping component includes a connecting rod (1104), a sleeve (1108), and a sliding plate (1111). The top of the connecting rod (1104) is detachably connected to the collar (1101). The lower half of the connecting rod (1104) is located inside the sleeve (1108). The bottom of the sleeve (1108) is fixedly provided with the sliding plate (1111). The sliding plate (1111) is slidably connected to the top of the support frame (1102).

4. The structure of the oil pump inlet and outlet pipes of the turbine governor according to claim 3, characterized in that: A limiting block (1107) is fixedly provided at the bottom of the connecting rod (1104), and a limiting ring (1105) is fixedly provided at the top of the collar (1101). The limiting ring (1105) is slidably connected to the connecting rod (1104), and the limiting block (1107) is slidably connected to the inner wall of the sleeve (1108). A spring (1106) is provided on the outer sleeve of the connecting rod (1104). The spring (1106) is located between the limiting ring (1105) and the limiting block (1107). A spring (1109) is provided at the top of the sliding plate (1111), and the other end of the spring (1109) is connected to the bottom of the limiting block (1107).

5. The structure of the oil pump inlet and outlet pipes of the turbine governor according to claim 3, characterized in that: The support frame (1102) has a sliding cavity (1112) at the top, and the sliding plate (1111) is slidably arranged inside the sliding cavity (1112). The sliding plate (1111) has multiple springs (1113) arranged around its circumference. The springs (1113) are connected to the inner wall of the sliding cavity (1112). The sliding cavity (1112) has a limiting ring (1110) at the top, and the limiting ring (1110) is fixedly connected to the support frame (1102).

6. The structure of the oil pump inlet and outlet pipes of the turbine governor according to claim 1, characterized in that: The first support vibration damping component (9) includes an arc-shaped support frame (901), a support column (902), and a dynamic vibration absorber. The top of the arc-shaped support frame (901) is detachably connected to the oil pump (1), and the bottom of the arc-shaped support frame (901) is threadedly connected to the support column (902). The top of the support column (902) is vertically provided with a receiving cavity (903), and the dynamic vibration absorber is provided in the receiving cavity (903). The dynamic vibration absorber is detachably connected to the bottom of the arc-shaped support frame (901).

7. The structure of the oil pump inlet and outlet pipes of the turbine governor according to claim 6, characterized in that: The dynamic vibration absorber includes a rigid element (904), a damping element (905), and an inertial element (906). The inertial element (906) is fitted with the damping element (905). The rigid element (904) is detachably connected at both ends to the arc-shaped support frame (901) and the inertial element (906).

8. The structure of the oil pump inlet and outlet pipes of the turbine governor according to claim 1, characterized in that: The oil outlet pipeline also includes a second oil outlet pipe (4), which is connected to the input end of the return oil tank (5). A hose (3) is provided between the second oil outlet pipe (4) and the first oil outlet pipe (2).

9. The structure of the oil pump inlet and outlet pipes of the turbine governor according to claim 1, characterized in that: The oil inlet pipeline includes a first oil inlet pipe (6) and a second oil inlet pipe (8), and a metal hose (7) is provided between the first oil inlet pipe (6) and the second oil inlet pipe (8).

10. The structure of the oil pump inlet and outlet pipes of the turbine governor according to claim 7, characterized in that: It also includes a motor (12) and a support base (10). The output end of the motor (12) is connected to the oil pump (1). The top of the support base (10) is provided with the motor (12), the first support damping component (9) and the second support damping component (11).

Images