CN210343569U - Sealing structure for telescopic joint of water turbine - Google Patents

Sealing structure for telescopic joint of water turbine Download PDF

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Publication number
CN210343569U
CN210343569U CN201920739664.8U CN201920739664U CN210343569U CN 210343569 U CN210343569 U CN 210343569U CN 201920739664 U CN201920739664 U CN 201920739664U CN 210343569 U CN210343569 U CN 210343569U
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CN
China
Prior art keywords
flange
telescopic joint
sealing
water pipe
tail
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Active
Application number
CN201920739664.8U
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Chinese (zh)
Inventor
李俊娜
周庆大
张续钟
凌成震
沈丹
杨柯
龚芹炬
陈璨
任尚洁
杨希华
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Zhejiang Fuchunjiang Hydropower Equipment Co ltd
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Zhejiang Fuchunjiang Hydropower Equipment Co ltd
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Priority to CN201920739664.8U priority Critical patent/CN210343569U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy

Abstract

The utility model discloses a hydraulic turbine telescopic joint seal structure, including tail water pipe flange and runner room afterbody flange, be equipped with the telescopic joint between tail water pipe flange and the runner room afterbody flange, the telescopic joint includes telescopic joint clamp plate and telescopic joint flange, telescopic joint flange and tail water pipe flange fixed connection, telescopic joint clamp plate and telescopic joint flange fixed connection, the interior circle of telescopic joint be equipped with runner room afterbody flange side seal complex sealing washer, be equipped with the sealing strip between the terminal surface of tail water pipe flange and the terminal surface of runner room afterbody flange, the interior circle of tail water pipe flange is equipped with the sealing strip clamp plate of radial action in the sealing strip. The utility model aims at providing a sealed effect does not receive runner chamber vibration, effectively prevents the hydraulic turbine telescopic joint seal structure that the telescopic joint leaked.

Description

Sealing structure for telescopic joint of water turbine
Technical Field
The utility model belongs to the hydraulic turbine field especially relates to a hydraulic turbine telescopic joint seal structure.
Background
In order to compensate the deviation caused by the installation and processing of the water distributor and the runner chamber, a telescopic joint is designed between the runner chamber and the tail pipe, so that the outer guide ring and the runner chamber have certain telescopic allowance along the axial direction. Because the draft tube flange face is bigger, warp easily when concrete placement, the local condition that can not compress tightly can appear in the sealing strip of telescopic joint, and the cantilever structure of runner room can vibrate in service, also can lead to the local compression volume change of telescopic joint sealing strip, so the telescopic joint often leaks after the installation. Along with the development of the water turbine technology, the size of the water turbine is larger and larger, and the problem of water leakage of the expansion joint is more and more prominent.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an overcome the above-mentioned not enough among the prior art, provide a sealed effect not receive runner chamber vibration, effectively prevent the hydraulic turbine telescopic joint seal structure that the telescopic joint leaked.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a hydraulic turbine telescopic joint seal structure, includes tail water pipe flange and runner room afterbody flange, be equipped with the telescopic joint between tail water pipe flange and the runner room afterbody flange, the telescopic joint includes telescopic joint clamp plate and telescopic joint flange, telescopic joint flange and tail water pipe flange fixed connection, telescopic joint clamp plate and telescopic joint flange fixed connection, the interior circle of telescopic joint be equipped with runner room afterbody flange side seal complex sealing washer, be equipped with the sealing strip between the terminal surface of tail water pipe flange and the terminal surface of runner room afterbody flange, the interior circle of tail water pipe flange is equipped with the sealing strip clamp plate of radial action sealing strip. The sealing ring is arranged on the side surfaces of the expansion joint and the tail flange of the runner chamber, and when the tail flange of the runner chamber and the tail water pipe flange move axially relatively, the sealing ring seals between the expansion joint and the tail flange of the runner chamber. Meanwhile, the sealing strip is located between the tail water pipe flange and the runner chamber tail flange, and the sealing strip pressing plate acts on the sealing strip to tightly press the sealing strip with the expansion joint, the tail water pipe flange and the runner chamber tail flange, so that the sealing strip is prevented from falling off. When relative axial displacement takes place for tail water pipe flange and runner room afterbody flange, the sealing strip compresses along the axial, and sealed effect does not receive the influence of runner room vibration.
Preferably, a first blank pressing edge bent towards the telescopic joint flange is arranged on the inner side of the telescopic joint pressing plate, a second blank pressing edge corresponding to the blank pressing edge is arranged on the inner circle of the telescopic joint flange, and a sealing ring groove for accommodating a sealing ring is formed between the first blank pressing edge and the second blank pressing edge. The sealing ring is arranged in a sealing ring groove formed by the first pressing edge and the second pressing edge, and the positioning of the sealing ring is stable and reliable.
Preferably, the first pressing edge and the second pressing edge are obliquely arranged, so that the cross section of the seal ring groove is in an outward-expanding V shape, and oblique seal edges corresponding to the first pressing edge and the second pressing edge are arranged on two sides of the seal ring. When the telescopic joint pressing plate is fixed with the telescopic joint flange, the first pressing edge and the second pressing edge are close to each other to extrude the sealing ring in the sealing ring groove, so that the sealing ring is tightly attached to the outer side face of the tail flange of the runner chamber, and the sealing effect is favorably improved.
Preferably, the sealing strip pressing plate is uniformly arranged along the circumferential direction of the inner circle of the draft tube flange, the positioning groove is formed in the inner side of the draft tube flange, and the inner side of the sealing strip pressing plate is connected with the positioning groove through a bolt. The sealing strip pressing plate is arranged along the circumferential direction, and acting force on the sealing strip is uniformly distributed, so that the sealing strip and the telescopic energy-saving device are always kept in a laminating state, and the sealing effect is ensured.
Preferably, the sealing strip pressing plate comprises a plate body and a positioning seat, the plate body and the positioning seat are of an integral structure, and the positioning seat is fixed in the positioning groove.
The utility model has the advantages that: through sealing strip and sealing strip clamp plate effect, seal between expansion joint, tail water pipe flange and the runner chamber afterbody flange, the sealing strip compression volume is along axial compression, has sufficient compression volume, and sealed effect is not influenced by the runner chamber vibration, has effectively solved the problem of leaking.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: the sealing device comprises a draft tube flange 1, an expansion joint 2, an expansion joint flange 2a, an expansion joint pressing plate 2b, a sealing ring groove 21, a sealing ring 3, a runner chamber tail flange 4, a sealing strip pressing plate 5, a plate body 5a, a positioning seat 5b and a sealing strip 6.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description.
In the embodiment shown in fig. 1, the sealing structure of the expansion joint of the water turbine comprises a draft tube flange 1 and a runner chamber tail flange 4, wherein the draft tube flange 1 and the runner chamber tail flange 4 are coaxially arranged. An expansion joint 2 is arranged between the tail water pipe flange 1 and the tail flange 4 of the runner chamber, the expansion joint 2 comprises an expansion joint pressing plate 2b and an expansion joint flange 2a, and the expansion joint flange 2a is fixedly connected with the tail water pipe flange 1 through bolts. The telescopic joint pressing plate 2b is positioned between the telescopic joint flange 2a and the runner chamber tail flange 4, and the telescopic joint pressing plate 2b is fixedly connected with the end face of the telescopic joint flange 2a through screws.
The inner circle of the telescopic joint 2 is provided with a sealing ring 3 which is in sealing fit with the side face of a tail flange 4 of the runner chamber, the inner side of a pressing plate 2b of the telescopic joint is provided with a first blank pressing which is bent towards the flange 2a of the telescopic joint, the inner circle of the flange 2a of the telescopic joint is provided with a second blank pressing which corresponds to the blank pressing, and a sealing ring groove 21 for accommodating the sealing ring 3 is formed between the first blank pressing and the second blank pressing. The first pressing edge and the second pressing edge are obliquely arranged, so that the cross section of the seal ring groove 21 is in an outward-expanding V shape, and oblique seal edges corresponding to the first pressing edge and the second pressing edge are arranged on two sides of the seal ring 3.
A sealing strip 6 is arranged between the end face of the tail water pipe flange 1 and the end face of the runner chamber tail flange 4, and a sealing strip pressing plate 5 which acts on the sealing strip 6 in the radial direction is arranged on the inner circle of the tail water pipe flange 1. The sealing strip pressing plate 5 is evenly arranged along the circumferential direction of the inner circle of the draft tube flange 1, the positioning groove is formed in the inner side of the draft tube flange 1, and the inner side of the sealing strip pressing plate 5 is connected with the positioning groove through a bolt. The sealing strip pressing plate 5 comprises a plate body 5a and a positioning seat 5b, the plate body 5a and the positioning seat 5b are of an integral structure, and the positioning seat 5b is fixed in the positioning groove.
In the actual operation process, the sealing ring 3 between the telescopic joint 2 and the tail flange 4 of the runner chamber is positioned in a sealing ring groove 21 formed by a first pressing edge and a second pressing edge, and after a telescopic joint pressing plate 2b of the telescopic joint 2 is fastened with a telescopic joint flange 2a through screws, the sealing ring 3 is pushed to be tightly pressed and sealed with the outer side face of the tail flange 4 of the runner chamber. Meanwhile, a sealing strip 6 is arranged between the tail water pipe flange 1 and the tail flange 4 of the runner chamber, and the sealing strip 6 with a proper diameter is selected to be bonded according to the gap between the end face of the tail water pipe flange 1 and the end face of the tail flange 4 of the runner chamber, so that the sealing strip 6 is ensured to have enough compression amount in the axial direction. The sealing strip pressing plate 5 is fixed on the inner circle of the tail water pipe flange 1 through bolts, so that the sealing strip 6 and the expansion joint 2 can be always kept in a laminating state, the sealing strip 6 is prevented from falling off, and the sealing effect is ensured.

Claims (5)

1. A sealing structure of a water turbine expansion joint is characterized by comprising a tail water pipe flange (1) and a runner chamber tail flange (4), an expansion joint (2) is arranged between the tail water pipe flange (1) and the tail flange (4) of the runner chamber, the telescopic joint (2) comprises a telescopic joint pressure plate (2 b) and a telescopic joint flange (2 a), the expansion joint flange (2 a) is fixedly connected with the tail water pipe flange (1), the expansion joint pressure plate (2 b) is fixedly connected with the expansion joint flange (2 a), the inner circle of the telescopic joint (2) is provided with a sealing ring (3) which is in sealing fit with the side surface of a flange (4) at the tail part of the runner chamber, be equipped with sealing strip (6) between the terminal surface of tail water pipe flange (1) and the terminal surface of runner chamber afterbody flange (4), the interior circle of tail water pipe flange (1) is equipped with sealing strip clamp plate (5) that radial action was in sealing strip (6).
2. The sealing structure of the telescopic joint of the water turbine as claimed in claim 1, wherein the inner side of the telescopic joint pressing plate (2 b) is provided with a first pressing edge bent towards the telescopic joint flange (2 a), a second pressing edge corresponding to the first pressing edge is arranged in the telescopic joint flange (2 a), and a sealing ring groove (21) for accommodating the sealing ring (3) is formed between the first pressing edge and the second pressing edge.
3. The sealing structure of the telescopic joint of the water turbine as claimed in claim 2, wherein the first and second pressing edges are obliquely arranged so that the cross section of the sealing ring groove (21) is in an outwardly expanded V shape, and the two sides of the sealing ring (3) are provided with oblique sealing edges corresponding to the first and second pressing edges.
4. The sealing structure of the water turbine telescopic joint according to claim 1, 2 or 3, characterized in that the sealing strip pressing plate (5) is uniformly arranged along the circumferential direction of the inner circle of the tail water pipe flange (1), the inner side of the tail water pipe flange (1) is provided with a positioning groove, and the inner side of the sealing strip pressing plate (5) is in bolt connection with the positioning groove.
5. The sealing structure of the telescopic joint of the water turbine as claimed in claim 4, wherein the sealing strip pressing plate (5) comprises a plate body (5 a) and a positioning seat (5 b), the plate body (5 a) and the positioning seat (5 b) are of an integral structure, and the positioning seat (5 b) is fixed in the positioning groove.
CN201920739664.8U 2019-05-22 2019-05-22 Sealing structure for telescopic joint of water turbine Active CN210343569U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920739664.8U CN210343569U (en) 2019-05-22 2019-05-22 Sealing structure for telescopic joint of water turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920739664.8U CN210343569U (en) 2019-05-22 2019-05-22 Sealing structure for telescopic joint of water turbine

Publications (1)

Publication Number Publication Date
CN210343569U true CN210343569U (en) 2020-04-17

Family

ID=70182665

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920739664.8U Active CN210343569U (en) 2019-05-22 2019-05-22 Sealing structure for telescopic joint of water turbine

Country Status (1)

Country Link
CN (1) CN210343569U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110374781A (en) * 2019-05-22 2019-10-25 浙江富春江水电设备有限公司 A kind of hydraulic turbine telescopic joint sealing structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110374781A (en) * 2019-05-22 2019-10-25 浙江富春江水电设备有限公司 A kind of hydraulic turbine telescopic joint sealing structure
CN110374781B (en) * 2019-05-22 2020-10-16 浙江富春江水电设备有限公司 Sealing structure for expansion joint of water turbine

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