CN211598903U

CN211598903U - Wear plate of piston type hydraulic end face sealing device of main shaft of water turbine

Info

Publication number: CN211598903U
Application number: CN201922403369.8U
Authority: CN
Inventors: 谢文经; 朱远志; 刘玉光; 施凤良; 黄朝柱; 杨舟; 王星; 戴利传; 柴连和; 席小逆; 杨正; 刘杨; 涂珍波; 方文翰
Original assignee: Guizhou Qianneng Enterprise Co ltd
Current assignee: Guizhou Qianneng Enterprise Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-09-29
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses a hydraulic pressure end face seal device's wear plate of hydraulic turbine main shaft piston. The utility model discloses a wear plate, the anti abrasive disc of wear plate swing joint, retaining ring and a set of pump leaf are connected to the piece that wear, and the pump leaf is located in the retaining ring. The utility model has the advantages of but the husky water that can significantly reduce avoids welding deformation to wearing plate and rubber seal ring's wearing and tearing, and the convenient maintenance, reducible maintenance time and shut down the electric quantity loss that causes.

Description

Wear plate of piston type hydraulic end face sealing device of main shaft of water turbine

Technical Field

The utility model relates to a hydraulic turbine main shaft end face seal technical field, especially a hydraulic turbine main shaft piston water pressure end face seal device's wear plate.

Background

The piston type hydraulic pressure end face sealing device for the existing water turbine main shaft is provided with a wear plate, the structure of the wear plate assembly is an annular plate, the wear plate is sleeved on the water turbine main shaft conveniently, the wear plate is composed of two semicircular annular plates, a stainless steel layer is formed on the wear plate in a build-up welding mode for improving abrasion resistance, and the wear plate is machined flatly. Two semicircle ring boards can make up into the ring with the bolt, on the direct mount hydraulic turbine main shaft, the during operation rotates along with the hydraulic turbine main shaft, in wear plate lower part, there is "U" type seal receptacle, the rubber seal ring is equipped with to the seal receptacle liam, process out lubricated cooling trough at rubber ring terminal surface center, lubricated cooling trough is arranged in the pinhole of rubber ring along the whole circle of rubber ring terminal surface, when hydraulic turbine work was shut down, the rubber seal ring falls in "U" type seal receptacle bottom by the dead weight, at this moment the sealing of hydraulic turbine is undertaken by overhauing sealedly. When the water turbine works, lubricating and cooling water jacks up the rubber ring, the upper part of the rubber ring is contacted with the wear-resistant plate, the leakage water overflowing from the gap between the main shaft and the top cover is sealed, the water stopping effect is achieved, and meanwhile, part of water also has the lubricating and cooling effects.

The piston type water pressure end face sealing device for the main shaft of the water turbine with the structure is widely applied to hydraulic power plants, and the using effect is good. However, when the structure is applied to a hydraulic power plant of a sediment-laden river, the water flow discharged along with the main shaft of the water turbine contains a large amount of sediment, and the sediment enters the friction surface to seriously wear the wear-resistant plate and the rubber sealing ring, so that the water leakage is increased, and the water guide oil basin is submerged in serious conditions to cause tile burning accidents. Although stainless steel is adopted for build-up welding of the existing wear-resistant plate, when the wear-resistant plate is used in a working environment with large silt, the wear-resistant plate still cannot resist the abrasion of the silt at a low level, and the wear-resistant performance is still not ideal.

Therefore, under the operating environment of much silt, current hydraulic turbine main shaft piston water pressure end face sealing device has the condition of the wear plate of silt serious wear and tear and rubber seal ring, and the maintenance of wear plate and rubber seal ring need consume longer time and great manpower and materials, and the electric quantity loss that the machine halt caused during the maintenance is also very big.

Disclosure of Invention

An object of the utility model is to provide a hydraulic turbine main shaft piston water pressure end face seal device's wear plate. The utility model has the advantages of but the husky water that can significantly reduce avoids welding deformation to wearing plate and rubber seal ring's wearing and tearing, and the convenient maintenance, reducible maintenance time and shut down the electric quantity loss that causes.

The utility model adopts the following technical scheme to realize the purpose of the invention:

the utility model provides a hydraulic pressure end face sealing device's of hydraulic turbine main shaft piston wear plate, includes wear plate, wear plate swing joint anti-abrasive disc, and retaining ring and a set of pump leaf are connected to the anti-abrasive disc, and the pump leaf is located in the retaining ring.

In the wear-resistant plate of the hydraulic end face sealing device for the piston type main shaft of the water turbine, the pump blades are arranged in an annular array by taking the centers of the wear-resistant pieces as circles.

In the wear plate of the hydraulic end face sealing device for the piston type main shaft of the water turbine, one end of the pump blade is connected with the inner ring wall of the check ring.

In the wear plate of the hydraulic end face sealing device for the piston type main shaft of the water turbine, the wear resistant plate is connected with the wear plate through a bolt.

In the wear plate of the hydraulic pressure end face sealing device for the piston type main shaft of the water turbine, the anti-grinding plate, the check ring and the pump blade are made of stainless steel.

In the wear-resistant plate of the piston type hydraulic end face sealing device for the main shaft of the water turbine, 6-12 pump blades are arranged.

In the wear plate of the hydraulic end face sealing device for the piston type main shaft of the water turbine, the number of the pump blades is 8.

In the wear-resistant plate of the piston type hydraulic end face sealing device for the main shaft of the water turbine, the pump blades are obliquely arranged on the wear-resistant plate, and the inclination angle is 30-60 degrees.

In the wear plate of the piston type hydraulic end face sealing device for the main shaft of the water turbine, the inclination angle is 45 degrees.

Advantageous effects

The conventional hydraulic end face sealing device for the piston type water pressure of the main shaft of the water turbine mainly comprises a wear-resistant plate, a stainless steel surfacing layer, a rubber sealing ring, a clean water pressure, an overhauling shroud ring, a sealing seat, a main shaft and other structures. The inventor analyzes that the wear-resistant plate is arranged on the main shaft, the wear-resistant plate rotates along with the main shaft, the rubber sealing ring is arranged in the sealing seat, and the rubber sealing ring is upwards propped against the stainless steel overlaying layer of the wear-resistant plate under the action of cleaning water pressure to seal the leakage water overflowing along the main shaft. Because the sealing seat is fixed, the rubber sealing ring can only float up and down and does not rotate along with the wear plate, sliding friction is formed between the rubber sealing ring and the wear plate, leakage water overflowing along the main shaft has certain pressure, and at the moment, if silt is contained in water, the silt is easy to enter the friction surface, so that abrasion of the friction surface is caused.

To overcome the above problems, the inventors have optimized and modified the conventional wear plate. Compared with the prior art, the utility model discloses the wear plate and the piece that wear resistance of structure are detachable construction, replace current welding mode, have convenient the maintenance, can avoid welding deformation, can reduce the maintenance down time and shut down the advantage of the electric quantity loss that causes. When the structure of the utility model is used, the pump blade on the wear-resistant piece rotates along with the main shaft when the water turbine operates, the pump blade on the wear-resistant piece has the special inclined shape, so that the pump blade has the functions of a thrust type pump blade and a centrifugal type pump blade, and the water flow pushed out by the thrust type pump blade is vertically downward; the water pumped by the centrifugal pump blade is radiated to the periphery, acts on the retaining ring and is folded downwards, the two actions pump the water downwards together, the direction of the water leakage overflowing from the gap between the main shaft and the top cover is opposite to that of the water leakage overflowing from the gap between the main shaft and the top cover, and the pressure and the water quantity of the overflowing sand-containing water leakage are reduced. The retainer ring also has the function of a leakage stopping ring, and the retainer ring and a surrounding sealing member form a clearance type leakage stopping ring to increase the resistance of the silt water flow to the friction surface. Through the utility model discloses the structure can make the chance that contains husky percolating water cluster goes into friction surface between wear plate and the rubber seal ring reduce to alleviate the wearing and tearing of containing husky water to wear plate and rubber seal ring.

In summary, the following steps: the utility model has the advantages of can avoid welding deformation, convenient maintenance, reducible maintenance time and shut down the electric quantity loss that causes to still have the advantage that can significantly reduce the wearing and tearing that contain husky water caused wear plate and rubber seal ring.

Drawings

Fig. 1 is a schematic structural view of a piston type hydraulic end face sealing device applied to a main shaft of a water turbine;

fig. 2 is a schematic structural diagram of the present invention;

FIG. 3 is a schematic diagram of the position relationship of the pump blade, the anti-abrasion disc and the anti-abrasion plate of the present invention;

fig. 4 is a schematic structural diagram of a piston type hydraulic end face sealing device of a main shaft of a conventional water turbine.

The labels in the figures are: 1-a wear-resistant plate, 2-an anti-abrasive disc, 3-a check ring, 4-a pump blade, 5-a main shaft, 6-a sealing seat, 7-an overhaul shroud ring, 8-a rubber sealing ring and 9-clean water pressure. 3 are close to 8 without touching.

Detailed Description

The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.

Examples are given. A wear plate of a piston type hydraulic end face sealing device of a main shaft of a water turbine is shown in figures 1-3 and comprises a wear plate 1, wherein the wear plate 1 is movably connected with an anti-grinding plate 2, the anti-grinding plate 2 is connected with a check ring 3 and a group of pump blades 4, namely the pump blades 4 are distributed on the friction surface of a non-rubber sealing ring, and the pump blades 4 are arranged in the check ring 3. The centers of the wear plate 1 and the wear plate 2 are inevitably provided with mounting holes for being arranged on the main shaft 5.

The pump blades 4 are arranged in an annular array by taking the center of the wear-resistant sheet 2 as a circle.

One end of the pump blade 4 is connected with the inner ring wall of the retainer ring 3. When the anti-abrasion disc 2 is connected with the pump blade 4 and the check ring 3 and arranged on the main shaft 5, the outer ring wall of the check ring 3 is close to the rubber sealing ring 8 and does not contact the rubber sealing ring 8.

The anti-abrasion plate 2 is connected with the abrasion plate 1 through a bolt.

The anti-abrasive disc 2, the check ring 3 and the pump blade 4 are made of stainless steel.

The number of the pump blades 4 is 6-12, preferably 8.

The pump blades 4 are obliquely arranged on the wear-resistant sheet 2, the specific inclination angle is adjusted according to water turbines with different rotating speeds, the inclination angle used by a common water turbine is 30-60 degrees, and for a water turbine with medium rotating speed, the inclination angle is preferably 45 degrees

The anti-abrasive disc 2 and the pump blade 4, and the pump blade 4 and the retainer ring 3 are welded by stainless steel welding rods.

The utility model discloses a use method and theory of operation: firstly, the anti-abrasion disc 2 is fixed on the anti-abrasion plate 1 by bolts, the pump blade 4 is welded on the anti-abrasion disc 2, and then the stainless steel check ring 3 is welded on the outer edge of the pump blade 4. The utility model is similar to the wear plate of the conventional hydraulic turbine main shaft piston type hydraulic pressure end face sealing device during use, the utility model replaces the conventional wear plate, when the hydraulic turbine operates, the pump blade 4 on the anti-grinding disc 2 rotates along with the main shaft 5, the pump blade 4 on the anti-grinding disc 2 is in an inclined special shape, so that the anti-grinding disc has the functions of a thrust type pump blade and a centrifugal type pump blade, and the water flow pushed by the thrust type pump blade is vertically downward; the water pumped by the centrifugal pump blade is radiated to the periphery, acts on the retainer ring 3 and is folded downwards, the two actions pump the water downwards together, the direction of the water is opposite to that of the water leakage overflowing from the gap between the main shaft 5 and the top cover, and the pressure and the water quantity of the overflowing sand-containing water leakage are reduced. The retainer ring 3 also has the function of a leakage-stopping ring, and the retainer ring and a surrounding sealing member form a clearance type leakage-stopping ring to increase the resistance of the silt water flow to the friction surface. Through the utility model discloses the structure can make the chance that contains husky percolating water cluster goes into friction surface between wear plate and the rubber seal ring 8 reduce to alleviate the wearing and tearing of containing husky water to wear plate and rubber seal ring 8.

Claims

1. The utility model provides a hydraulic pressure end face seal device's of hydraulic turbine main shaft piston wear plate which characterized in that: including wear plate (1), wear plate (1) swing joint anti-abrasive disc (2), retaining ring (3) and a set of pump leaf (4) are connected to anti-abrasive disc (2), and retaining ring (3) are located in pump leaf (4).

2. The wear plate of the hydraulic end face sealing device of the piston type main shaft of the water turbine as claimed in claim 1, wherein: the pump blades (4) are circular in center of the anti-abrasive disc (2) and are arranged in an annular array.

3. The wear plate of the hydraulic end face sealing device of the piston type main shaft of the water turbine as claimed in claim 1, wherein: one end of the pump blade (4) is connected with the inner ring wall of the retainer ring (3).

4. The wear plate of the hydraulic end face sealing device of the piston type main shaft of the water turbine as claimed in claim 1, wherein: the anti-abrasion plate (2) is connected with the anti-abrasion plate (1) through a bolt.

5. The wear plate of the hydraulic end face sealing device of the piston type main shaft of the water turbine as claimed in claim 1, wherein: the anti-abrasion plate (2), the check ring (3) and the pump blade (4) are made of stainless steel.

6. The wear plate of the hydraulic end face sealing device of the piston type main shaft of the water turbine as claimed in claim 1, wherein: 6-12 pump blades (4) are arranged.

7. The wear plate of the hydraulic end face sealing device of the piston type main shaft of the water turbine as claimed in claim 6, wherein: the number of the pump blades (4) is 8.

8. The wear plate of the hydraulic end face sealing device of the piston type main shaft of the water turbine as claimed in claim 1, wherein: the pump blade (4) is obliquely arranged on the wear-resistant sheet (2), and the inclination angle is 30-60 degrees.

9. The wear plate of the hydraulic end face seal of the piston type main shaft of the water turbine as claimed in claim 8, wherein: the inclination angle is 45 °.