Operation sealing structure of horizontal small hydro-turbine generator set
By designing a combined sealing system including packing grooves, gap adjustment copper rings, self-lubricating seals and packings, the problem of poor sealing effect of horizontal small water turbine generator sets is solved, and the effect of reducing water leakage and improving the operating environment is achieved.
Patent Information
- Application Number
- CN202421419125.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The operation sealing effect of horizontal small water turbine generator sets is poor, resulting in an increase in water leakage, affecting the operation of the unit, and the leakage of water pollutes the operating environment.
A combined sealing system including a packing groove, a gap adjustment copper ring, a self-lubricating seal and a packing is designed. Through three sealing structures, the gap between the spindle and the top cover is reduced, the leakage is reduced, and water leakage is drawn through the drainage pipe.
It effectively reduces the amount of water leakage, improves the unit's operating sealing effect, improves the operating environment, and ensures the stability of the sealing structure and the reliability of long-term operation.
Smart Images
Figure CN222732102U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of sealing structures, in particular to an operating sealing structure for a horizontal small-sized hydro-turbine generator set. Background Art
[0002] When the turbine generator set is operating normally, a small amount of water will leak from the turbine runner anti-leakage ring, and this water will overflow along the gap between the main shaft and the top cover, hindering the normal operation of the unit. The operation seal of the turbine generator set can effectively prevent this water from overflowing along the gap between the main shaft and the top cover.
[0003] Since the running seal of the horizontal small hydro-turbine generator set adopts a single packing seal, the running seal effect is poor, and the packing is seriously worn after long-term operation, resulting in increased running seal leakage, which cannot effectively prevent the leakage from overflowing along the gap between the main shaft and the top cover, affecting the operation of the unit. At the same time, the leakage water flows out of the packing groove, polluting the operating environment of the unit. Utility Model Content
[0004] The purpose of the utility model is to provide a horizontal small-sized hydro-turbine generator set running sealing structure to solve the problems existing in the background technology.
[0005] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:
[0006] The running sealing structure of a horizontal small hydro-turbine generator set comprises a packing groove connected to the end cover of the generator set, wherein a stepped hole is arranged at the center of the packing groove, a small-diameter portion is matched with the clearance of the main shaft of the generator set, and a large-diameter portion is sequentially provided with a clearance adjustment copper ring, a self-lubricating seal, a packing and a combined sealing system of a self-lubricating seal, wherein the clearance adjustment copper ring serves as the first seal, and the self-lubricating seal and the packing cooperate with each other to form the second and third seals, and the three seals seal the clearance between the small-diameter portion and the main shaft of the generator set.
[0007] Further technology of the utility model:
[0008] Preferably, an adjusting bolt is provided on the side of the packing groove away from the end cover of the generator set, a gland is inserted and connected to the adjusting bolt, a movable end of the gland rests on the self-lubricating seal, and an adjusting nut is provided on the adjusting bolt to limit the gland.
[0009] Preferably, a sealing structure outer cover is provided on the end cover of the generator set, and the sealing structure outer cover wraps the packing groove and is gap-matched with the main shaft of the generator set.
[0010] Preferably, the sealing structure outer cover is composed of two semi-cylindrical cover bodies connected by bolts.
[0011] Preferably, a drain pipe is provided at the lower portion of the sealing structure outer cover, and the drain pipe is communicated with the interior of the sealing structure outer cover.
[0012] The beneficial effects of the utility model are:
[0013] The utility model adopts a sealing method in which three sealing structures cooperate with each other, which not only reduces the water leakage and improves the operating sealing effect of the unit, but also improves the direction of the operating seal leakage and improves the operating environment of the unit. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.
[0015] Figure 1 Schematic diagram of the operating sealing structure of the utility model;
[0016] Figure 2 Schematic diagram of the outer cover matching the drainage pipe;
[0017] The symbols in the figure are: 1-packing groove; 2-gap adjustment copper ring; 3-self-lubricating seal; 4-packing; 5-pressure cover; 6-adjusting bolt; 7-adjusting nut; 8-outer cover; 9-drain pipe; 10-main shaft; 11-generator end cover. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be further described in detail below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model but not all. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0019] like Figure 1-2 The utility model provides a horizontal small-scale hydro-turbine generator set running sealing structure, including a packing groove 1 connected to the generator set end cover 11, the packing groove 1 is provided with a stepped hole at the center, the small aperture portion is clearance-matched with the generator set main shaft 10, and the large aperture portion is sequentially provided with a clearance adjustment copper ring 2, a self-lubricating seal 3, a packing 4 and a combined sealing system of the self-lubricating seal 3, the clearance adjustment copper ring 2 serves as the first seal, the self-lubricating seal 3 and the packing 4 cooperate with each other to form the second and third seals, and the three seals seal the gap between the small aperture portion and the generator set main shaft 10.
[0020] A total of three sealing structures are added, namely, the gap adjustment copper ring 2, the self-lubricating seal 3, and the packing 4. These three structures cooperate with each other to form the operating seal of the unit. The gap adjustment copper ring 2 as the first sealing structure reduces the gap between the packing groove 1 and the main shaft 10, reducing the amount of water leakage; the self-lubricating seal 3 and the packing 4 cooperate with each other to form the second and third seals. The self-lubricating seal 3 itself has a self-lubricating property, and the water in the self-lubricating seal 3 can lubricate the packing 4, reducing the wear of the packing 4 and ensuring the stability of the second and third sealing structures during the operation of the unit. At the same time, the second and third seals further reduce the gap between the packing groove 1 and the main shaft 10, further reducing the amount of water leakage during the operation of the unit.
[0021] An adjusting bolt 6 is provided on the side of the packing groove 1 away from the generator set end cover 11 , a gland 5 is inserted and connected to the adjusting bolt 6 , a movable end of the gland 5 is pressed against the self-lubricating seal 3 , and an adjusting nut 7 is provided on the adjusting bolt 6 to limit the gland 5 .
[0022] The three types of seals cooperate with the gland 5 and the adjusting bolt 6 to realize manual adjustment of the operating seal effect, thereby ensuring that the operating seal can always be in the best sealing state during the operation of the unit.
[0023] The generator set end cover 11 is provided with a sealing structure outer cover 8 , which wraps the packing groove 1 and is clearance-matched with the generator set main shaft 10 .
[0024] The sealing structure outer cover 8 is composed of two semi-cylindrical cover bodies connected by bolts.
[0025] A drain pipe 9 is provided at the lower part of the sealing structure outer cover 8 , and the drain pipe 9 is communicated with the inside of the sealing structure outer cover 8 .
[0026] This improvement also adds a drainage pipe 9 to the operating sealing box to lead out the leakage water during operation through the pipeline, changing the original situation where the leakage water flows out from the packing groove 1, and improving the operating environment of the unit.
[0027] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.
Claims
1. The running sealing structure of a horizontal small hydro-turbine generator set is characterized by: It comprises a packing groove connected to the end cover of the generator set, wherein a stepped hole is arranged at the center of the packing groove, a small-diameter portion is matched with the clearance of the main shaft of the generator set, and a large-diameter portion is sequentially provided with a clearance adjustment copper ring, a self-lubricating seal, a packing and a combined sealing system of a self-lubricating seal, wherein the clearance adjustment copper ring serves as the first seal, and the self-lubricating seal and the packing cooperate with each other to form the second and third seals, and the three seals seal the clearance between the small-diameter portion and the main shaft of the generator set.
2. According to the horizontal small hydro-turbine generator set running sealing structure as claimed in claim 1, it is characterized by: An adjusting bolt is provided on one side of the packing groove away from the end cover of the generator set, a gland is inserted and connected to the adjusting bolt, a movable end of the gland rests on the self-lubricating seal, and an adjusting nut is provided on the adjusting bolt to limit the gland.
3. According to the horizontal small hydro-turbine generator set running sealing structure as claimed in claim 1, it is characterized by: The generator set end cover is provided with a sealing structure outer cover, which wraps the packing groove and is clearance-matched with the main shaft of the generator set.
4. The operating sealing structure of a horizontal small hydro-turbine generator set according to claim 3 is characterized in that: The sealing structure outer cover is composed of two semi-cylindrical cover bodies connected by bolts.
5. The operating sealing structure of a horizontal small hydro-turbine generator set according to claim 3 is characterized in that: A drainage pipe is arranged at the lower part of the sealing structure outer cover, and the drainage pipe is communicated with the inside of the sealing structure outer cover.