CN114575946B - Locating pin anti-loosening structure of first-stage baffle holding ring - Google Patents

Locating pin anti-loosening structure of first-stage baffle holding ring Download PDF

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Publication number
CN114575946B
CN114575946B CN202210229962.9A CN202210229962A CN114575946B CN 114575946 B CN114575946 B CN 114575946B CN 202210229962 A CN202210229962 A CN 202210229962A CN 114575946 B CN114575946 B CN 114575946B
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China
Prior art keywords
holding ring
positioning pins
stage
locating pin
positioning
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CN202210229962.9A
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Chinese (zh)
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CN114575946A (en
Inventor
常倩倩
王超
赵俊波
姚福锋
张红莲
刘殊一
丁化文
韦俊
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703th Research Institute of CSIC
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703th Research Institute of CSIC
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Priority to CN202210229962.9A priority Critical patent/CN114575946B/en
Publication of CN114575946A publication Critical patent/CN114575946A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/246—Fastening of diaphragms or stator-rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/243—Flange connections; Bolting arrangements
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Abstract

The invention aims to provide a locating pin anti-loosening structure of a first-stage baffle holding ring, which comprises a cylinder, a first-stage holding ring and locating pins, wherein radial bolts with the same number as the locating pins are arranged at the locating pins of the first-stage holding ring. According to the invention, the positions of the radial bolts are reasonably arranged, so that the loosening and falling of the positioning pins of the first-stage baffle retainer ring are effectively prevented, and the safety and reliability of the steam turbine under the condition of long-term operation are improved.

Description

Locating pin anti-loosening structure of first-stage baffle holding ring
Technical Field
The invention relates to a steam turbine inlet chamber, in particular to a loosening structure of a first-stage holding ring of the steam turbine inlet chamber.
Background
The multi-stage baffle holding ring adopted by the steam turbine plays a role of a baffle sleeve or an inner cylinder, and the baffle holding ring is often composed of multi-stage whole-circle rings, and long pins are adopted to be positioned step by step between the stages of holding rings. Except the first-stage holding ring, the other holding rings at all stages can ensure that the positioning pin moves in a limited space in a series manner in the long-term operation process, and the pin can still play a role in interstage positioning even when the pin is in a limiting position.
The front part of the primary holding ring is a steam inlet chamber of the steam turbine, and a large space is generally reserved in design, so that a plurality of positioning pins of the primary holding ring are loosened and even completely thrown off during long-term operation, and when the situation occurs, the positioning between the primary holding ring and the secondary holding ring cannot be ensured, and the accident probability of the steam turbine is greatly increased.
Disclosure of Invention
The invention aims to provide a locating pin anti-loosening structure of a first-stage baffle holding ring, which ensures effective locating of a first-stage locating pin.
The purpose of the invention is realized in the following way:
the invention relates to a locating pin anti-loosening structure of a first-stage baffle holding ring, which comprises a cylinder, a first-stage holding ring and a locating pin, and is characterized in that: radial bolts with the same number as the positioning pins are arranged at the positioning pins of the first-stage holding ring.
The invention may further include:
1. the axial distance between the locating pin and the bolt is less than the effective locating length of the locating pin.
2. The distance between the cylinder and the holding ring is reserved for ensuring the position of the radial bolt.
The invention has the advantages that: the invention can ensure the stability and safety of the steam turbine at the position of the holding ring locating pin under the condition that the steam turbine continuously runs for a long time.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is described in more detail below, by way of example, with reference to the accompanying drawings:
in combination with fig. 1, the invention comprises a holding ring 1, positioning pins 2 between a primary holding ring and a secondary holding ring, radial bolts 3 and cylinders 4, the number of which is the same as that of the positioning pins 2, and the positioning pins 2 can be loosened during the operation of the steam turbine, so that the axial distance between the positioning pins 2 and the radial bolts 3 is smaller than the effective positioning length of the positioning pins 2, and the positioning pins 2 can also play a role in positioning in the limit position. The radial bolts are screwed into the holding ring 1 by using a torque wrench, and finally the partition plate and the holding ring 1 are integrally installed into the cylinder 4, and the distance between the cylinder 4 and the holding ring 1 ensures the position of the radial bolts 3, so that the radial bolts 3 do not need to be in anti-rotation design, and two purposes are achieved. The invention adopts a relatively simple structure, and basically can ensure that the first-stage locating pin is always effective in the service life cycle of the steam turbine, and no running risk exists.
The implementation process of the invention comprises the following steps:
and calculating the number of the required positioning pins 2, and analyzing the working state and the effective positioning length of the positioning pins 2.
According to the calculation and analysis results, radial bolts 3 are arranged at corresponding positions of the holding ring 1 to prevent the loosening failure of the positioning pins 2.
The invention has the relevant technical characteristics that:
1. the design adopts a method of adding radial bolts, thereby effectively preventing the loosening and falling of the positioning pin of the first-stage baffle retainer ring.
2. Simple structure, strong operability and no occupation of other spaces.

Claims (2)

1. The utility model provides a locating pin locking structure of first level baffle holding ring, includes cylinder, first level holding ring, locating pin, characterized by: radial bolts with the same number as the positioning pins are arranged at the positioning pins of the first-stage holding ring, the radial bolts are positioned at the front ends of the positioning pins and penetrate through pin holes of the positioning pins, the head parts of the bolts are positioned at the outer diameter of the holding ring, and the axial distance between the positioning pins and the radial bolts is smaller than the effective positioning length of the positioning pins.
2. The locking structure of the locating pin of the first-stage baffle holding ring according to claim 1, wherein the locking structure is characterized in that: the distance between the cylinder and the holding ring is reserved for ensuring the position of the radial bolt.
CN202210229962.9A 2022-03-09 2022-03-09 Locating pin anti-loosening structure of first-stage baffle holding ring Active CN114575946B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210229962.9A CN114575946B (en) 2022-03-09 2022-03-09 Locating pin anti-loosening structure of first-stage baffle holding ring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210229962.9A CN114575946B (en) 2022-03-09 2022-03-09 Locating pin anti-loosening structure of first-stage baffle holding ring

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CN114575946A CN114575946A (en) 2022-06-03
CN114575946B true CN114575946B (en) 2023-12-05

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Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB542197A (en) * 1940-01-25 1941-12-30 British Thomson Houston Co Ltd Improved supporting arrangement for elastic fluid turbine diaphragms
GB1150062A (en) * 1965-09-01 1969-04-30 Ass Elect Ind Improvements in or relating to clamping together of two parts of a pressure casing by means of studs or bolts
CN1031877A (en) * 1987-08-24 1989-03-22 西屋电气公司 The thermal distortion isolation system that turbine blade rings is used
US5024579A (en) * 1990-07-18 1991-06-18 Westinghouse Electric Corp. Fully floating inlet flow guide for double-flow low pressure steam turbines
JPH0960633A (en) * 1995-08-21 1997-03-04 Mitsubishi Heavy Ind Ltd Retaining pin device
JP2008261378A (en) * 2007-04-10 2008-10-30 Nec Access Technica Ltd Screw slip-off prevention structure
CN101545359A (en) * 2008-03-26 2009-09-30 煤炭科学研究总院西安研究院 Reed type shedding-proof inserted pin
CA2688888A1 (en) * 2008-12-19 2010-06-19 Robert S. Bierwith Quick release screw connector for earth-moving equipment
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CN206111247U (en) * 2016-09-12 2017-04-19 中国科学院工程热物理研究所 Axial turbine structure of different nozzle cascades and movable vane can change outfit
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CN111677589A (en) * 2020-06-10 2020-09-18 中国船舶重工集团公司第七0三研究所 Composite elastic cantilever type gas turbine support ring vibration-damping and impact-resisting assembly
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CN215890109U (en) * 2021-10-26 2022-02-22 华能陇东能源有限责任公司 Positioning push-pull device for steam turbine cylinder

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US9822669B2 (en) * 2014-07-18 2017-11-21 Siemens Energy, Inc. Turbine assembly with detachable struts
JP6373770B2 (en) * 2015-01-30 2018-08-15 三菱日立パワーシステムズ株式会社 Bolt retaining structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB542197A (en) * 1940-01-25 1941-12-30 British Thomson Houston Co Ltd Improved supporting arrangement for elastic fluid turbine diaphragms
GB1150062A (en) * 1965-09-01 1969-04-30 Ass Elect Ind Improvements in or relating to clamping together of two parts of a pressure casing by means of studs or bolts
CN1031877A (en) * 1987-08-24 1989-03-22 西屋电气公司 The thermal distortion isolation system that turbine blade rings is used
US4816213A (en) * 1987-08-24 1989-03-28 Westinghouse Electric Corp. Thermal distortion isolation system for turbine blade rings
US5024579A (en) * 1990-07-18 1991-06-18 Westinghouse Electric Corp. Fully floating inlet flow guide for double-flow low pressure steam turbines
JPH0960633A (en) * 1995-08-21 1997-03-04 Mitsubishi Heavy Ind Ltd Retaining pin device
JP2008261378A (en) * 2007-04-10 2008-10-30 Nec Access Technica Ltd Screw slip-off prevention structure
CN101545359A (en) * 2008-03-26 2009-09-30 煤炭科学研究总院西安研究院 Reed type shedding-proof inserted pin
CA2688888A1 (en) * 2008-12-19 2010-06-19 Robert S. Bierwith Quick release screw connector for earth-moving equipment
DE102009049691A1 (en) * 2009-10-16 2011-04-21 Siemens Aktiengesellschaft Sealing arrangement on a steam turbine housing, comprising a fixable sealing ring
CN202628720U (en) * 2012-04-28 2012-12-26 苏州光福冶金铸造有限责任公司 Locating pin
CN204402593U (en) * 2014-12-08 2015-06-17 北京华清燃气轮机与煤气化联合循环工程技术有限公司 A kind of turbine turns structure in quiet tune
CN206111247U (en) * 2016-09-12 2017-04-19 中国科学院工程热物理研究所 Axial turbine structure of different nozzle cascades and movable vane can change outfit
CN109578091A (en) * 2018-11-23 2019-04-05 东方电气集团东方汽轮机有限公司 A kind of gas turbine segmentation ring fixing structure
CN211039324U (en) * 2019-10-10 2020-07-17 徐州华恒机器人系统有限公司 But plug positioner of high strength high efficiency
CN111677589A (en) * 2020-06-10 2020-09-18 中国船舶重工集团公司第七0三研究所 Composite elastic cantilever type gas turbine support ring vibration-damping and impact-resisting assembly
CN113236647A (en) * 2021-05-21 2021-08-10 嘉兴奥展实业有限公司 High elasticity solid construction of preventing of security
CN215890109U (en) * 2021-10-26 2022-02-22 华能陇东能源有限责任公司 Positioning push-pull device for steam turbine cylinder

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