Bulb tubular unit runner sealing structure

Abstract

The utility model discloses a bulb tubular unit rotating wheel sealing structure, belongs to the technical field of hydroelectric generation, solves the problem that whether water enters a rotating wheel or not cannot be detected, and comprises a bulb head and a draft tube, a main shaft is arranged on the inner wall of the bulb head, and the other end of the main shaft is fixedly connected with the rotating wheel. The outer surface of the bulb head and the outer surface of the rotating wheel are fixedly connected with fixing bases, grooves are formed in the outer surfaces of the fixing bases, and the inner walls of the grooves are fixedly connected with a plurality of sets of capacitive moisture sensors. Due to the fact that the dielectric constant of water is relatively large, when turbine oil in the groove contains moisture, the value of a sensor capacitor in the capacitive moisture sensor can be changed, the sensor can monitor the change of the capacitor in real time and transmit data to monitoring equipment, then workers can be warned conveniently, and the working efficiency is improved. And the groove can be conveniently and timely overhauled and maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of hydropower generation, in particular to a bulb tubular unit runner sealing structure. Background Art

[0002] The water diversion components of the bulb tubular turbine adopt a tubular water diversion method. The water flows into the turbine axially, passes through the guide vanes and the runner, and then flows out axially. The runner is similar to a cylinder with blades. The blades are usually curved to efficiently convert the energy of the water flow into mechanical energy. The control room of the unit is the core area of ​​the entire power generation system. It houses many sophisticated electronic control equipment and monitoring instruments. These devices play a vital role in regulating and monitoring the safe and efficient operation of the unit. Therefore, it is necessary to prevent river water from entering the control room.

[0003] The existing sealing structure is in an environment where the impeller is constantly impacted and surrounded by water. Despite the protection of the sealing structure, after long-term operation and various complex hydraulic conditions, the sealing structure may gradually wear, age, or be damaged by unexpected impacts. River water may break through the sealing line and penetrate into the impeller. Therefore, there is a problem of not being able to detect whether water has entered the impeller. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the above problems existing in the prior art, the utility model provides a bulb tubular unit runner sealing structure.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a bulb cross-flow unit impeller sealing structure, including a bulb head and a tailwater pipe, the inner wall of the bulb head is provided with a main shaft, the other end of the main shaft is fixedly connected to the impeller, and the outer surfaces of the bulb head and the impeller are both fixedly connected to a fixing seat, the outer surface of the fixing seat is provided with a groove, the inner wall of the groove is fixedly connected to multiple groups of capacitive moisture sensors, and the outer surface of the fixing seat is fitted with a locking ring, the inner wall of the locking ring is clamped with a slider, the outer surface of the slider is fixedly connected to a connecting block, and the outer surface of the connecting block is fixedly connected to a first sealing strip and a second sealing strip.

[0008] As a preferred solution of the bulb cross-flow unit impeller sealing structure described in the utility model, the outer surface of the bulb head is fixedly connected to an inner water distribution ring, and the outer surface of the inner water distribution ring is rotatably connected to multiple groups of guide vanes.

[0009] By adopting the above technical solution, the speed of the water flow can be easily controlled through multiple groups of guide vanes.

[0010] As a preferred solution of the bulb cross-flow unit impeller sealing structure described in the utility model, the inner wall of the inner water distribution ring is fixedly connected with a sealing assembly, and one end of the main shaft passes through the sealing assembly and is fixedly connected to the outer surface of the impeller.

[0011] By adopting the above technical solution, the sealing component can prevent water from entering the inner water distribution ring.

[0012] As a preferred solution of the bulb tubular unit impeller sealing structure described in the utility model, a groove is provided on the inner side surface of the locking ring to cooperate with the slider, and the slider adopts a convex structure.

[0013] By adopting the above technical solution, the slider is clamped into the inner wall of the locking ring, thereby facilitating the disassembly and maintenance of the slider.

[0014] As a preferred solution of the bulb tubular unit impeller sealing structure described in the present invention, the slider, the connecting block, the first sealing strip and the second sealing strip are all made of rubber and adopt an integral injection molding structure.

[0015] By adopting the above technical solution and the one-piece injection molding structure, it is convenient to simultaneously maintain the slider, the connecting block, the first sealing strip and the second sealing strip.

[0016] As a preferred solution of the bulb cross-flow unit impeller sealing structure described in the utility model, the outer surface of the locking ring is threadedly connected with a screw, and the other end of the screw passes through another set of the locking rings and is threadedly connected with a nut.

[0017] By adopting the above technical solution, the locking ring can be conveniently fixed to the outer surface of the fixing seat by means of screws and nuts.

[0018] (3) Beneficial effects

[0019] The utility model provides a bulb tubular unit rotor sealing structure, which has the following beneficial effects:

[0020] 1. Since the dielectric constant of water is relatively large, when the turbine oil in the groove contains water, the value of the sensor capacitance in the capacitive moisture sensor will change. The sensor will monitor the change in capacitance in real time and transmit the data to the monitoring equipment, which will facilitate warnings to staff and timely inspection and maintenance of the groove.

[0021] 2. By setting the locking ring on the outer surface of the fixing seat, and then passing the other end of the screw through another set of locking rings, the nut is threadedly connected to the outer surface of the screw, thereby facilitating the fixing of the locking ring on the outer surface of the fixing seat, so that the outer surfaces of the first sealing strip and the second sealing strip are fitted with the rotating shaft of the runner, thereby facilitating the prevention of water from entering the runner and the inner water distribution ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic structural diagram of the utility model as a whole;

[0024] Figure 2 It is a schematic diagram of the front cross-sectional structure of the entire utility model;

[0025] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of A in the middle;

[0026] Figure 4 It is a schematic side sectional structure diagram of the entire utility model.

[0027] In the figure, 1. Bulb head; 2. Tailwater pipe; 3. Guide vane; 4. Inner water distribution ring; 5. Main shaft; 6. Runner; 7. Fixed seat; 8. Groove; 9. Capacitive moisture sensor; 10. Slider; 11. Connecting block; 12. First sealing strip; 13. Locking ring; 14. Nut; 15. Screw; 16. Second sealing strip; 17. Sealing assembly. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] Example 1

[0030] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4, which is the first embodiment of the present utility model, provides a bulb cross-flow unit impeller sealing structure, including a bulb head 1 and a tailwater pipe 2, the inner wall of the bulb head 1 is provided with a main shaft 5, the other end of the main shaft 5 is fixedly connected to the impeller 6, and the outer surfaces of the bulb head 1 and the impeller 6 are both fixedly connected to a fixing seat 7, the outer surface of the fixing seat 7 is provided with a groove 8, the inner wall of the groove 8 is fixedly connected to multiple groups of capacitive moisture sensors 9, and the outer surface of the fixing seat 7 is fitted with a locking ring 13, the inner wall of the locking ring 13 is clamped with a slider 10, the outer surface of the slider 10 is fixedly connected to a connecting block 11, the outer surface of the connecting block 11 is fixedly connected to a first sealing strip 12 and a second sealing strip 16, wherein the capacitive moisture sensor 9 adopts the Trident WM800 model.

[0031] Specifically, the outer surface of the bulb head 1 is fixedly connected to the inner water distribution ring 4, the outer surface of the inner water distribution ring 4 is rotatably connected to multiple sets of guide vanes 3, the inner wall of the inner water distribution ring 4 is fixedly connected to the sealing assembly 17, and one end of the main shaft 5 passes through the sealing assembly 17 and is fixedly connected to the outer surface of the runner 6.

[0032] Furthermore, since the dielectric constant of water is relatively large, when the turbine oil contains water, the value of the sensor capacitance in the capacitive moisture sensor 9 will change. The sensor will monitor the change in capacitance in real time and transmit the data to the monitoring equipment, thereby facilitating warnings to the staff and timely inspection and maintenance.

[0033] Example 2

[0034] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , which is the second embodiment of the present utility model. This embodiment is based on the previous embodiment. The inner side of the locking ring 13 is provided with a card groove to cooperate with the slider 10. The slider 10 adopts a convex structure. The slider 10, the connecting block 11, the first sealing strip 12 and the second sealing strip 16 are all made of rubber and adopt an integral injection molding structure. The outer surface of the locking ring 13 is threadedly connected with a screw 15, and the other end of the screw 15 passes through another set of locking rings 13 and is threadedly connected with a nut 14.

[0035] Furthermore, by sleeve-mounting the locking ring 13 on the outer surface of the fixing seat 7 and then passing the other end of the screw 15 through another set of locking rings 13, the nut 14 is threadedly connected to the outer surface of the screw 15, thereby facilitating the fixing of the locking ring 13 on the outer surface of the fixing seat 7, so that the outer surfaces of the first sealing strip 12 and the second sealing strip 16 are in contact with the rotating shaft of the runner 6, thereby facilitating the prevention of water from entering the runner 6 and the inner water distribution ring 4.

[0036] Working principle: By sleeved the locking ring 13 on the outer surface of the fixing seat 7, and then passing the other end of the screw 15 through another set of locking rings 13, the nut 14 is threadedly connected to the outer surface of the screw 15, so as to facilitate fixing the locking ring 13 on the outer surface of the fixing seat 7, so that the outer surface of the first sealing strip 12 and the second sealing strip 16 are fitted with the rotating shaft of the runner 6, thereby facilitating preventing water from entering the runner 6 and the inner water distribution ring 4. Since the dielectric constant of water is relatively large, when the turbine oil in the groove 8 contains water, the value of the sensor capacitance in the capacitive moisture sensor 9 will change. The sensor will monitor the change in capacitance in real time and transmit the data to the monitoring equipment, thereby facilitating warnings to the staff and facilitating timely inspection and maintenance of the groove 8.

[0037] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

Claims

1. A bulb tubular unit runner sealing structure, comprising a bulb head (1) and a tailwater pipe (2), characterized in that: The inner wall of the light bulb head (1) is provided with a main shaft (5), the other end of the main shaft (5) is fixedly connected to a rotating wheel (6), and the outer surfaces of the light bulb head (1) and the rotating wheel (6) are fixedly connected to a fixing seat (7), the outer surface of the fixing seat (7) is provided with a groove (8), the inner wall of the groove (8) is fixedly connected to multiple groups of capacitive moisture sensors (9), and the outer surface of the fixing seat (7) is fitted with a locking ring (13), the inner wall of the locking ring (13) is clamped with a slider (10), the outer surface of the slider (10) is fixedly connected to a connecting block (11), and the outer surface of the connecting block (11) is fixedly connected to a first sealing strip (12) and a second sealing strip (16).

2. The bulb tubular unit runner sealing structure according to claim 1, characterized in that: The outer surface of the bulb head (1) is fixedly connected to an inner water distribution ring (4), and the outer surface of the inner water distribution ring (4) is rotatably connected to multiple groups of guide vanes (3).

3. The bulb tubular unit rotor seal structure according to claim 2, characterized in that: A sealing assembly (17) is fixedly connected to the inner wall of the inner water distribution ring (4), and one end of the main shaft (5) passes through the sealing assembly (17) and is fixedly connected to the outer surface of the runner (6).

4. The bulb tubular unit rotor seal structure according to claim 1, characterized in that: The inner side surface of the locking ring (13) is provided with a slot to cooperate with the slider (10), and the slider (10) adopts a convex structure.

5. The bulb tubular unit runner sealing structure according to claim 4, characterized in that: The slider (10), the connecting block (11), the first sealing strip (12) and the second sealing strip (16) are all made of rubber material and adopt an integral injection molding structure.

6. The bulb tubular unit runner sealing structure according to claim 5, characterized in that: The outer surface of the locking ring (13) is threadedly connected with a screw (15), and the other end of the screw (15) passes through another set of the locking rings (13) and is threadedly connected with a nut (14).

Images