CN213235316U

CN213235316U - Paddle feedback device of axial flow propeller turbine

Info

Publication number: CN213235316U
Application number: CN202021765894.0U
Authority: CN
Inventors: 黄海德
Original assignee: Guangxi Guiguan Electric Power Co ltd; Dahua General Hydropower Plant Of Guangxi Guiguan Electric Power Co ltd
Current assignee: Guangxi Guiguan Electric Power Co ltd; Dahua General Hydropower Plant Of Guangxi Guiguan Electric Power Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-05-18
Anticipated expiration: 2030-08-21

Abstract

The utility model discloses an axial flow paddle turbine paddle feedback device. The device comprises a feedback rod, a balance frame, a guide rod and two sets of blade displacement feedback sensors, wherein the feedback rod comprises a joint and an insulating rod, one end of the joint is connected with a unit return bearing, the head of the other end of the joint is provided with an inner connecting hole, one end of the insulating rod is coaxially sleeved in the inner connecting hole of the joint, and the other end of the insulating rod is connected with the balance frame; the balance frame is bilaterally symmetrical by taking the insulating rod as a center, and the two sets of paddle displacement feedback sensors are respectively connected to two ends of the balance frame; the guide rod is located between the joint and the balance frame and vertically penetrates through the insulating rod, and the insulating rod can move up and down along the guide rod when the unit returns to the bearing to move. The utility model provides a because the too big problem of feedback deviation of A cover paddle displacement sensor and B cover paddle displacement feedback sensor that the guide bar arouses by the skimming, the axle current that can also effectually avoid when the group moves production is introduced the oil-supply head shell.

Description

Paddle feedback device of axial flow propeller turbine

Technical Field

The utility model relates to a hydroelectric set technical field particularly, relates to an axial flow paddle turbine paddle feedback device.

Background

And a return bearing of the oil receiver of the unit is connected with a blade feedback device of the axial-flow Kaplan turbine for feeding back the opening degree of the blades. As shown in fig. 1, one end of a feedback rod 1 of the existing feedback device extends into a sliding groove formed in an oil-supply head shell and is connected with a unit feedback bearing, the other end of the feedback rod is connected with a balance frame 2, two ends of a cross rod 22 of the balance frame 2 are both connected with a guide rod 3 and a blade displacement feedback sensor 4, and in order to avoid that a shaft current generated during the operation of the unit is introduced into the oil-supply head shell, an insulating sleeve 9 is sleeved on the feedback rod 1. When the unit operates to adjust the opening and closing of the paddle, the feedback rod 1 swings along with the return bearing, so that the insulating sleeve 9 of the structure is easily ground and blocked by the paddle switch scale indication board 10, and meanwhile, the guide rods 3 at the two ends of the cross rod 22 are easily skimmed, so that the feedback deviation of A, B sets of paddle displacement feedback sensors 4 is too large, abnormal adjustment is caused, and the generating efficiency of the unit is influenced; and the feedback rod 1 and the balancing stand 2 of the existing axial flow Kaplan turbine blade feedback device are both made of metal materials, and the shaft current generated during the operation of the unit can be transmitted to the balancing stand 2, the guide rod 3 and the guide rail 8, so that potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the above-mentioned defect among the prior art, provide an axial-flow propeller turbine paddle feedback device, the device has solved because the guide bar is caught and the A cover paddle displacement feedback sensor that arouses is too big with B cover paddle displacement feedback sensor's feedback deviation and the problem that the axle electric current was drawn forth.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

a paddle feedback device of an axial-flow propeller turbine comprises a feedback rod, a balance frame, a guide rod and two sets of paddle displacement feedback sensors, wherein the feedback rod comprises a joint and an insulating rod, one end of the joint is in threaded connection with a return bearing of a unit, the head of the other end of the joint is provided with an inner connecting hole, one end of the insulating rod is coaxially sleeved in the inner connecting hole of the joint, and the other end of the insulating rod is connected with the balance frame; the balance frame is bilaterally symmetrical by taking the insulating rod as a center, and the two sets of paddle displacement feedback sensors are respectively connected to two ends of the balance frame; the guide rod is located between the joint and the balance frame and vertically penetrates through the insulating rod, and the insulating rod can move up and down along the guide rod when the unit returns to the bearing to move.

As a further improvement of the above technical solution:

the joint and the connecting end of the unit return bearing are of a screw structure, and the screw structure is matched with the connecting thread on the unit return bearing.

The end part of the connecting end of the insulating rod and the balance frame is provided with a hole, a steel bushing is arranged in the hole, a bolt is arranged on the balance frame, and the balance frame is connected with the steel bushing through the bolt.

And a pin screw is fixedly connected between the balance frame and the insulating rod.

The balance frame comprises a connecting plate and a cross rod, the middle part of the cross rod is connected with the connecting plate, the connecting plate is connected with an insulating rod, and two ends of the cross rod are respectively connected with two sets of paddle displacement feedback sensors.

Compared with the prior art, the utility model has the advantages that:

1. the guide mode that respectively connects a guide bar at the gimbal both ends originally is changed into the mode of a guide bar in the middle of the insulating rod, makes whole device more stable, reduces the insulating rod along with replying the wobbling range of bearing, can avoid the phenomenon that insulating rod and paddle switch scale sign bump mutually, does not have A cover and B cover paddle displacement feedback sensor because of the guide bar is caught and shows inconsistent problem.

2. The original insulation mode that the insulation sleeve is sleeved outside the feedback rod is changed into a mode that the structure of the feedback rod is set into the joint and the insulation rod, so that the shaft current generated when the unit operates can be prevented from being introduced into the oil receiver shell from the indicating plate for opening and closing the scales by the paddle, and the oil receiver shell can be prevented from being introduced by the balance frame.

Drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments or related technologies will be briefly introduced below, and it is obvious that the drawings in the following description only relate to some embodiments of the present invention and are not limiting to the present invention.

Fig. 1 is a schematic connection diagram of a blade feedback device and an oil receiver of an axial flow Kaplan turbine in the prior art.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic front view of the present invention connected to an oil supply head.

Fig. 4 is a schematic side view of the present invention connected to an oil supply head.

Reference numbers in the figures: 1. a feedback lever; 11. a joint; 12. an insulating rod; 2. a balancing stand; 21. a connecting plate; 22. A cross bar; 3. a guide bar; 4. a blade displacement feedback sensor; 5. steel jacket; 6. a bolt; 7. a pin screw; 8. a guide rail; 9. an insulating sleeve; 10. paddle switch scale sign.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the following detailed description of the present invention, taken in conjunction with the accompanying drawings and the detailed description, is given in a non-limiting manner.

As shown in fig. 2 to 4, the blade feedback device of the axial-flow propeller turbine comprises a feedback rod 1, a balance frame 2, a guide rod 3 and two sets of blade displacement feedback sensors 4, wherein the feedback rod 1 is arranged between a unit return bearing and the balance frame 2, the two sets of blade displacement feedback sensors 4 are respectively connected to two ends of the balance frame 2, and the guide rod 3 is inserted in the feedback rod 1.

As shown in fig. 2, the feedback rod 1 includes a joint 11 and an insulating rod 12. One end of the joint 11 is set to be in an M24 multiplied by 30mm screw structure, and can be directly used for being connected with a connecting thread on a recovery bearing of the unit without using other connecting pieces for connection. An inner connecting hole with the diameter of 38mm is formed in the head of the other end of the joint 11, and one end of an insulating rod 12 with the diameter of 38mm and the length of 185mm penetrates through a sliding groove formed in an oil receiver shell and then is directly inserted into the inner connecting hole of the joint to be coaxially connected with the joint 11. The other end of the insulating rod 12 is provided with a hole with the diameter of 16mm and the length of 30mm, a steel sleeve 5 with the outer diameter equal to the hole diameter is embedded in the hole, and a screw hole with the diameter of 10mm and the length of 25mm is formed in the steel sleeve 5. The insulating rod 12 penetrates through a sliding groove in the oil supply head shell to be connected with a joint, so that shaft current generated during the operation of the unit can be effectively prevented from being led out, and the oil supply head is safe and reliable.

As shown in fig. 3 and 4, the balance frame 2 includes a connection plate 21 and a cross bar 22 having a middle portion connected to the connection plate 21. The connecting plate 21 is provided with a screw hole, and the balancing stand 2 and the insulating rod 12 can be connected by screwing an M16 bolt 6 into the steel sleeve 5 through the screw hole. To prevent the balance frame 2 from rotating, the connecting plate 21 and the insulating rod 12 are fixed using the pin screw 7. The two ends of the cross rod 22 are connected with the paddle displacement feedback sensor 4 through universal connecting rods, and the paddle displacement feedback sensor 4 is movably connected on the guide rail 8.

As shown in fig. 2 and 4, a guide hole penetrating up and down is formed in the middle of the insulating rod 12 along the radial direction, and the diameter of the guide hole is 19 mm. The guide rod 3 with the rod diameter of 18mm penetrates through the guide hole and then is fixed up and down. The insulating rod 12 can move up and down along the guide rod 3 when the unit returns to the bearing movement.

The utility model discloses a guide bar 3 sets up between joint 11 and gimbal 2, has increased the stability of whole device, reduces insulating rod 12 along with replying bearing wobbling range, has avoided the phenomenon that insulating rod 12 and paddle switch scale sign 10 bump mutually, can not appear because guide bar 3 is caught and the too big problem of 4 feedback deviations of a cover and B cover paddle displacement feedback sensor that arouse. Meanwhile, the insulation mode is improved, and the shaft current generated during the operation of the unit is prevented from being introduced into the shell of the oil-supply head. The whole device runs stably, and is safe and reliable.

It should be noted that the above-mentioned preferred embodiments are only for illustrating the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, and the protection scope of the present invention cannot be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides an axial flow propeller turbine paddle feedback device, includes feedback rod (1), balancing stand (2), guide bar (3) and two sets of paddle displacement feedback sensor (4), its characterized in that: the feedback rod (1) comprises a joint (11) and an insulating rod (12), one end of the joint (11) is in threaded connection with the unit return bearing, the head of the other end of the joint is provided with an inner connecting hole, one end of the insulating rod (12) is coaxially sleeved in the inner connecting hole of the joint (11), and the other end of the insulating rod is connected with the balance frame (2); the balance frame (2) is bilaterally symmetrical by taking the insulating rod (12) as a center, and the two sets of blade displacement feedback sensors (4) are respectively connected to two ends of the balance frame (2); the guide rod (3) is located between the joint (11) and the balance frame (2) and vertically penetrates through the insulating rod (12), and the insulating rod (12) can move up and down along the guide rod (3) when the unit returns to the bearing to move.

2. The axial flow Kaplan turbine blade feedback device of claim 1, wherein: the connecting end of the joint (11) and the unit return bearing is of a screw structure, and the screw structure is matched with a connecting screw hole in the unit return bearing.

3. The axial flow Kaplan turbine blade feedback device of claim 1, wherein: the end part of the connecting end of the insulating rod (12) and the balance frame (2) is provided with a hole, a steel sleeve (5) is arranged in the hole, a bolt (6) is arranged on the balance frame (2), and the balance frame (2) is connected with the steel sleeve (5) through the bolt (6).

4. The axial flow Kaplan turbine blade feedback device of claim 3, wherein: and a pin screw (7) is fixedly connected between the balance frame (2) and the insulating rod (12).

5. The axial flow Kaplan turbine blade feedback device of claim 1, wherein: the balance frame (2) comprises a connecting plate (21) and a cross rod (22) connected with the connecting plate (21) in the middle, the connecting plate (21) is connected with an insulating rod (12), and two ends of the cross rod (22) are respectively connected with two sets of blade displacement feedback sensors (4).