Hydraulic turbine governor vibration suppression structure

Abstract

The utility model provides a kind of water turbine governor vibration suppression structure, including bottom plate and with the mounting seat of governor fixed connection, the bottom plate is connected by multiple damping mechanism and mounting seat, the damping mechanism includes damping rod, shock absorber spring, pull shaft and limit cone, the damping rod includes oil jacket and the slide sleeve rod of being set in the oil jacket, the upper and lower ends of the slide sleeve rod are respectively fixedly connected with upper arm and lower arm, the slide sleeve rod is set with shock absorber spring in the upper and lower ends of oil jacket, the pull shaft is set in the slide sleeve rod and both slide fit, the top end of the pull shaft is fixedly connected with force arm. In the utility model, by setting damping rod, shock absorber spring, pull shaft, limit cone and conical groove, so that damping rod and shock absorber spring can effectively alleviate the vibration of bottom plate transmission, so that the vibration frequency and amplitude of mounting seat with governor fixed connection greatly reduce, and then the service life of governor is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of water turbine governor technology, and in particular to a vibration suppression structure for a water turbine governor. Background Technology

[0002] The turbine governor is a core auxiliary control device of a hydro-generator unit, and its operational stability directly determines the safe and efficient operation of the unit. Currently, most turbine governors are installed using direct bolt fixing without dedicated vibration damping mechanisms, relying solely on the foundation structure for simple buffering, resulting in weak shock resistance. During operation, the hydro-generator unit generates continuous vibrations from water flow impacts and mechanical operation. These vibrations are directly transmitted to the internal components of the governor through the foundation. Over time, this can lead to loosening and accelerated wear of internal parts, severely shortening the governor's service life, increasing the risk of unit failure, and affecting the stable operation of the power generation system. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a vibration suppression structure for a water turbine governor, so as to solve the problems of short life and inconvenient disassembly and maintenance caused by the lack of vibration suppression mechanism in the existing governor.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A vibration suppression structure for a turbine governor includes a base plate and a mounting base fixedly connected to the governor. The base plate is connected to the mounting base via multiple damping mechanisms. Each damping mechanism includes a damping rod, damping springs, a pull shaft, and limiting cones. The damping rod includes an oil sleeve and a sliding rod that passes through and is sleeved within the oil sleeve. An upper support arm and a lower support arm are fixedly connected to the upper and lower ends of the sliding rod, respectively. Damping springs located at the upper and lower ends of the oil sleeve are sleeved on the sliding rod. The pull shaft passes through and is sleeved within the sliding rod, with the two slidingly engaged. A force arm is fixedly connected to the top of the pull shaft. Limiting cones with opposite small ends are fixedly connected to the opposite sides of the force arm and the lower support arm. A nut is screwed onto the bottom end of the pull shaft. The outer wall of the oil sleeve is fixedly connected to the top wall of the base plate via a bracket.

[0005] Furthermore, the mounting base has conical grooves on its upper and lower sides that are adapted to the limiting cone.

[0006] Furthermore, both the upper and lower ends of the oil sleeve are fixedly connected with oil seal sleeves that are fitted onto the outer wall of the sliding sleeve rod.

[0007] Furthermore, a disc located inside the oil sleeve is fixedly sleeved on the outside of the sliding sleeve rod. The disc and the oil sleeve are in transition fit, and a number of circumferentially evenly distributed spiral oil grooves are opened on its outer peripheral wall.

[0008] Furthermore, the limiting cone includes a rod shaft and a conical head fixedly disposed at one end of the rod shaft. A shock-absorbing pad is provided on the outer conical wall of the conical head. The opposite sides of the lower support arm and the lever arm are fixedly connected to the other end of the corresponding rod shaft.

[0009] Furthermore, the shock-absorbing pad is a detachable conical sleeve structure that is compatible with the conical head.

[0010] Furthermore, a guide sleeve is fixedly connected to the upper support arm and sleeved on the outside of the adjacent rod shaft, and the lower support arm and the bracket slide together vertically.

[0011] Furthermore, the support includes a support column and an ear plate. There are two support columns, which are located on both sides of the oil sleeve. The top of the support column is fixedly connected to the outer wall of the oil sleeve through the ear plate. The two sides of the lower support arm are fixedly connected to the limiting sleeves sleeved on the outside of the support column through connecting rods.

[0012] Furthermore, the number of the shock absorption mechanisms is four, and the four shock absorption mechanisms are evenly distributed around the outer periphery of the mounting base.

[0013] Furthermore, the conical head is made by a 45-degree chamfer.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, by setting a damping rod, a shock-absorbing spring, a pull shaft, a limiting cone, and a conical groove, the damping rod and the shock-absorbing spring can effectively alleviate the vibration transmitted by the base plate, thereby greatly reducing the vibration frequency and amplitude of the mounting base fixedly connected to the speed controller, thus effectively suppressing the harmful vibration of the speed controller and extending the service life of the speed controller.

[0015] 2. In this utility model, by setting a lower support arm, lever arm, conical groove, limiting cone, nut and pull shaft, the limiting cone connects the mounting base and the shock absorption mechanism by pressing the conical groove. This not only ensures a reliable connection, but also allows the mounting base to quickly separate from the shock absorption mechanism when the nut is loosened, and allows the mounting base and the shock absorption mechanism to be connected when the nut is tightened. This design makes the disassembly and maintenance of the speed controller more convenient. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the shock absorption mechanism structure according to an embodiment of the present utility model; Figure 3 This is a schematic diagram showing the mounting base and the conical head separated in an embodiment of this utility model.

[0017] In the diagram: 1. Base plate; 2. Mounting seat; 21. Conical groove; 3. Vibration damping mechanism; 31. Damping rod; 311. Oil sleeve; 3111. Oil seal sleeve; 3112. Bracket; 31121. Support column; 31122. Ear plate; 312. Sliding sleeve rod; 3121. Upper support arm; 31212. Guide sleeve; 3122. Lower support arm; 31221. Limiting sleeve; 3123. Disc; 31231. Spiral oil groove; 32. Vibration damping spring; 33. Pull shaft; 331. Lever arm; 34. Limiting cone; 341. Rod shaft; 342. Conical head; 3421. Vibration damping pad; 4. Nut. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0019] Example 1 Please see Figures 1 to 3 This utility model provides a technical solution: a vibration suppression structure for a water turbine governor, including a base plate 1 and a mounting base 2 fixedly connected to the governor. The base plate 1 is a base plate, which is fixedly connected to the ground or the water turbine during use. The base plate 1 is connected to the mounting base 2 through multiple damping mechanisms 3. The damping mechanisms 3 can effectively alleviate the impact of the vibration of the base plate 1 on the mounting base 2, specifically on the governor, and greatly reduce the frequency and amplitude of the governor's vibration.

[0020] Specifically, the damping mechanism 3 includes a damping rod 31, a damping spring 32, a pull shaft 33, and a limiting cone 34. The damping rod 31 includes an oil sleeve 311 and a sliding sleeve rod 312 that passes through and is sleeved inside the oil sleeve 311. Both the upper and lower ends of the oil sleeve 311 are fixedly connected to oil seal sleeves 3111 that are sleeved on the outer wall of the sliding sleeve rod 312. The oil seal sleeves 3111 seal the connection between the sliding sleeve rod 312 and the oil sleeve 311. The sliding sleeve rod 312 and the oil sleeve 311 are in a damping sliding fit. The oil sleeve 311 contains hydraulic fluid. The sliding sleeve rod 312 is externally fixedly fitted with a disc 3123 located inside the oil sleeve 311. The disc 3123 and the oil sleeve 311 are in transition fit, and its outer peripheral wall has several circumferentially evenly distributed spiral oil passages 31231. When the disc 3123 moves up and down, the oil on both sides of it flows through the spiral oil passages 31231. The spiral oil passages 31231 are used to limit the flow rate of the oil. The upper support arm 3121 and the lower support arm 3122 are fixedly connected to the upper and lower ends of the sliding sleeve rod 312, respectively. A damping spring 32 is fitted onto the sleeve rod 312 at the upper and lower ends of the oil sleeve 311. The opposite sides of the upper support arm 3121 and the lower support arm 3122 abut against one end of the adjacent damping spring 32. The damping spring 32, in conjunction with the damping action of the damping rod 31, can buffer the transmitted vibration. The pull shaft 33 is sleeved through the sliding sleeve rod 312 and the two are slidably engaged. The top end of the pull shaft 33 is fixedly connected to the lever arm 331. The opposite sides of the lever arm 331 and the lower support arm 3122 are fixedly connected to the small end opposite limiters. When the cone 34 and the pull shaft 33 move axially, the distance between the limit cone 34 on the lever arm 331 and the lower support arm 3122 can be adjusted. The outer wall of the oil sleeve 311 is fixedly connected to the top wall of the base plate 1 through the bracket 3112. The upper and lower sides of the mounting seat 2 are provided with conical grooves 21 that are adapted to the limit cone 34. When the conical groove 21 is squeezed and limited by the limit cone 34, the mounting seat 2 is limited. The bottom end of the pull shaft 33 is screwed with a nut 4. When the nut 4 is tightened, the squeezing force of the limit cone 34 on the conical groove 21 increases.

[0021] In this embodiment, the limiting cone 34 includes a rod shaft 341 and a conical head 342 fixedly disposed at one end of the rod shaft 341. The conical head 342 is made by a 45-degree chamfer. A shock-absorbing pad 3421 is provided on the outer conical wall of the conical head 342. The opposite sides of the lower support arm 3122 and the lever arm 331 are fixedly connected to the other end of the corresponding rod shaft 341. The setting of the shock-absorbing pad 3421 makes the conical head 342 and the conical groove 21 in a flexible contact state, which can further alleviate vibration. The shock-absorbing pad 3421 is a conical sleeve structure that is adapted to and detachable from the conical head 342. During installation, the shock-absorbing pad 3421 is sleeved on the outside of the conical head 342. This setting facilitates the replacement of the shock-absorbing pad 3421.

[0022] In this embodiment, a guide sleeve 31212 is fixedly connected to the upper support arm 3121 and sleeved outside the adjacent rod shaft 341. The guide sleeve 31212 and the rod shaft 341 are axially slidably engaged, and the lower support arm 3122 and the bracket 3112 are vertically slidably engaged. This arrangement has the function of limiting the movement of the conical head 342, so that the conical head 342 can only move up and down.

[0023] The bracket 3112 includes a support column 31121 and an ear plate 31122. There are two support columns 31121, which are located on both sides of the oil sleeve 311. The bottom end of the support column 31121 is fixedly connected to the upper end face of the base plate 1. The top end of the support column 31121 is fixedly connected to the outer wall of the oil sleeve 311 through the ear plate 31122. The two sides of the lower support arm 3122 are fixedly connected by connecting rods to the limiting sleeve 31221 sleeved on the outside of the support column 31121. The limiting sleeve 31221 and the support column 31121 slide vertically and cooperate with each other.

[0024] Working principle: Four damping mechanisms 3 are installed on the base plate 1, surrounding the outer periphery of the mounting base 2. The mounting base 2 is square, with four conical grooves 21 near the corners. During use, vibrations from the ground or water turbine are transmitted to the base plate 1. When the base plate 1 vibrates, the oil sleeve 311 moves slightly axially relative to the sliding sleeve rod 312. Due to the inertial force of the governor itself, the damping spring 32 buffers the impact of vibration on the mounting base 2. The oil in the oil sleeve 311 flows in the spiral oil grooves 31231. Due to the resistance of the spiral oil grooves 31231, the resistance of the oil sleeve 311 to move relative to the sliding sleeve rod 312 increases, which greatly reduces the vibration frequency and amplitude of the mounting base 2 and the vibration frequency and amplitude of the base plate 1, thereby achieving the function of suppressing governor vibration. When the speed controller needs to be disassembled for inspection and maintenance, use a wrench to loosen nut 4. At this time, pull the pull shaft 33 upward, and the conical head 342 above the mounting base 2 will disengage from the conical groove 21. Then lift the entire speed controller and twist it 45 degrees so that the mounting base 2 is offset from the conical head 342. Continue to lift the speed controller to remove it and then perform offline maintenance. After the maintenance is completed, the mounting base 2 can be reset by reversing the above disassembly method.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vibration suppression structure for a turbine governor, comprising a base plate (1) and a mounting base (2) fixedly connected to the governor, characterized in that, The base plate (1) is connected to the mounting base (2) by multiple damping mechanisms (3). The damping mechanism (3) includes a damping rod (31), a damping spring (32), a pull shaft (33), and a limiting cone (34). The damping rod (31) includes an oil sleeve (311) and a sliding rod (312) that is sleeved inside the oil sleeve (311). The upper and lower ends of the sliding rod (312) are respectively fixedly connected to an upper support arm (3121) and a lower support arm (3122). The sliding rod (312) is sleeved with a support located at... The oil sleeve (311) has shock-absorbing springs (32) at both ends. The pull shaft (33) is sleeved inside the sliding sleeve rod (312) and the two slide together. The top end of the pull shaft (33) is fixedly connected to a force arm (331). The opposite sides of the force arm (331) and the lower support arm (3122) are fixedly connected to a limiting cone (34) with opposite small ends. The bottom end of the pull shaft (33) is screwed with a nut (4). The outer wall of the oil sleeve (311) abuts against the top wall of the base plate (1) through the bracket (3112).

2. The vibration suppression structure for a turbine governor as described in claim 1, characterized in that, The mounting base (2) has conical grooves (21) on its upper and lower sides that are adapted to the limiting cone (34).

3. The vibration suppression structure for a turbine governor as described in claim 2, characterized in that, Both the upper and lower ends of the oil sleeve (311) are fixedly connected with oil seal sleeves (3111) sleeved on the outer wall of the sliding sleeve rod (312).

4. The vibration suppression structure for a turbine governor as described in claim 1, characterized in that, The outer side of the sliding sleeve rod (312) is fixedly fitted with a disc (3123) located inside the oil sleeve (311). The disc (3123) and the oil sleeve (311) are in transition fit, and its outer peripheral wall is provided with a number of circumferentially evenly distributed spiral oil grooves (31231).

5. The vibration suppression structure for a turbine governor as described in claim 1, characterized in that, The limiting cone (34) includes a rod shaft (341) and a cone head (342) fixedly disposed at one end of the rod shaft (341). A shock-absorbing pad (3421) is provided on the outer cone wall of the cone head (342). The opposite sides of the lower support arm (3122) and the lever arm (331) are fixedly connected to the other end of the corresponding rod shaft (341).

6. The vibration suppression structure for a turbine governor as described in claim 5, characterized in that, The shock-absorbing pad (3421) is a detachable conical sleeve structure that is compatible with the conical head (342).

7. The vibration suppression structure for a turbine governor as described in claim 5, characterized in that, The upper support arm (3121) is fixedly connected to a guide sleeve (31212) sleeved on the outside of the adjacent rod shaft (341), and the lower support arm (3122) and the bracket (3112) slide together vertically.

8. The vibration suppression structure for a turbine governor as described in claim 1, characterized in that, The bracket (3112) includes a support column (31121) and an ear plate (31122). There are two support columns (31121) located on both sides of the oil sleeve (311). The top of the support column (31121) is fixedly connected to the outer wall of the oil sleeve (311) through the ear plate (31122). The two sides of the lower support arm (3122) are fixedly connected to the limiting sleeve (31221) sleeved on the outside of the support column (31121) through the connecting rod.

9. The vibration suppression structure for a turbine governor as described in claim 1, characterized in that, The number of the shock absorption mechanism (3) is four, and the four shock absorption mechanisms (3) are evenly distributed around the outer periphery of the mounting base (2).

10. The vibration suppression structure for a turbine governor as described in claim 5, characterized in that, The conical head (342) is made by a 45-degree chamfer.

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