CN107476924A - Hydropower Unit top cover safety device - Google Patents

Hydropower Unit top cover safety device Download PDF

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Publication number
CN107476924A
CN107476924A CN201710958772.XA CN201710958772A CN107476924A CN 107476924 A CN107476924 A CN 107476924A CN 201710958772 A CN201710958772 A CN 201710958772A CN 107476924 A CN107476924 A CN 107476924A
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CN
China
Prior art keywords
cover
spacing ring
bolt block
internal diameter
plane
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Granted
Application number
CN201710958772.XA
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Chinese (zh)
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CN107476924B (en
Inventor
覃大清
卜良峰
钟苏
高欣
高洪军
赵越
曲扬
王燕
刘永新
杨卫彬
羿兰贵
张晨琦
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Harbin Electric Machinery Co Ltd
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Harbin Electric Machinery Co Ltd
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Application filed by Harbin Electric Machinery Co Ltd filed Critical Harbin Electric Machinery Co Ltd
Priority to CN201710958772.XA priority Critical patent/CN107476924B/en
Publication of CN107476924A publication Critical patent/CN107476924A/en
Application granted granted Critical
Publication of CN107476924B publication Critical patent/CN107476924B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03BMACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • 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 present invention relates to a kind of Hydropower Unit top cover safety device, spacing ring is along the circumferential direction provided with multiple grooves, is welded on seat ring;Several bolt blocks are screwed in spacing ring groove, are placed in below spacing ring lower plane;When nut loosening, top cover drives bolt block to be axially moveable and contacted with spacing ring lower plane;By spacing ring position-limiting action, top cover can not continue to move up, and sealing is still effective, so as to ensure unit safety operation.The present invention is simple to operate, easy to implement, does not change original structure, you can ensure the security of Hydropower Unit.

Description

Hydropower Unit top cover safety device
Technical field
The present invention relates to a kind of Hydropower Unit top cover safety device.
Background technology
Hydropower Unit is the mechanical energy that the mechanical energy that current are paid is converted into runner, runner and main shaft is overcome various resistances Power and continuously run, then the mechanical energy of acquisition is converted into the mechanical device of electric energy by generator.Hydropower Unit is being transported During row, usually cause unit vibration because fluid, machinery, electromagnetism etc. influence each other, make top cover connecting bolt should by alternation Power acts on, and influences the service life of closure stud.Further, since Hydropower Unit can be run under different heads, different operating modes, machine The range of operation of group on-load is big, and start and stop is frequent, and is often under non-optimal operating condition and runs, as shown in figure 3, causing to make It is very big with the water pressure numerical value change on top cover;Stress suffered by closure stud is in a higher level, causes top cover to connect Stress on connecting bolt can fluctuate widely.Pump-storage generator in Hydropower Unit, which has concurrently, to draw water and generating function, has height The characteristics of head, high rotating speed, operation of complicated multi-state, high is required to security and stability.Water pump, the hydraulic turbine in the operating condition Change working is more frequent, and high side pressure amplitude of variation can be bigger during change working, stress water suffered by closure stud Ping Genggao, stress fluctuation are bigger.Therefore, Hydropower Unit high stress level, frequently alternate stress and unit vibration effect under, The probability that top cover nut loosens can be significantly increased, so as to directly injure the operation of Hydropower Unit or even whole power plant peace Entirely.
In view of this, it is necessary to a kind of Hydropower Unit top cover safety device is developed, in different working condition pressure luffing mistakes When big or unit vibration causes the nut to loosen, it can ensure there is reliable mechanical connection between top cover and seat ring;Avoid in water Cause top cover that axial displacement occurs in the presence of pressure, cause to lose effective sealing between top cover and seat ring, overflow press water Unit enters factory building, influences power plant safety operation, or even jeopardizes the situation generation of power station staff's personal safety.
The content of the invention
The technical problem to be solved in the present invention is that pressure luffing is excessive under different operating modes or unit vibration causes nut to be sent out It is raw to loosen, when causing to lose effective mechanical connection between top cover and seat ring, there is provided a kind of top for ensureing Hydropower Unit safe operation Lid safety device.
The technical scheme is that:A kind of Hydropower Unit top cover safety device, it is characterized in that:The section of spacing ring 2 For rectangular shaped, spacing ring 2 is overlooked circumferentially is provided with multiple grooves for sector, spacing ring 2, and spacing ring 2 is welded on seat ring 1; The section of bolt block 3 is rectangular shaped, and bolt block 3 is overlooked as sector;Several bolt blocks 3 are screwed in by the groove of spacing ring 2 and are placed in limiting Below the lower plane 8 of ring 2 of position, there is certain axial gap between plane 9 and the lower plane 8 of spacing ring 2 on bolt block 3;Bolt block 3 is placed in top cover 6 Above.
The internal diameter of 2 facade of spacing ring 10 and the flange excircle of top cover 6 are concentric, and the internal diameter of 2 facade of spacing ring 10 is more than the flange of top cover 6 Exradius;The internal diameter of 2 vertical plane of spacing ring 11 and the flange excircle of top cover 6 are concentric, and the internal diameter of 2 vertical plane of spacing ring 11 is vertical less than spacing ring 2 The internal diameter of face 10, and the internal diameter of 2 vertical plane of spacing ring 11 is more than the flange excircle radius of top cover 6;The internal diameter of 3 vertical plane of bolt block 12 and the method for top cover 6 It is blue cylindrical concentric, and the internal diameter of 3 vertical plane of bolt block 12 is less than the flange excircle radius of top cover 6;Bolt block 3 is vertical to face 13 internal diameters and top cover 6 directly Flange excircle is concentric, and bolt block 3 is vertical faces 13 internal diameters directly and be more than the flange excircle radius of top cover 6;The external diameter of 3 periphery of bolt block 14 and top cover 6 flange excircles are concentric, and the external diameter of 3 periphery of bolt block 14 is less than the internal diameter of 2 facade of spacing ring 10.
Operation principle
It is illustrated in figure 3 conventional Hydropower Unit top cover, stay ring installation structure chart.It is distributed where the screw of the flange of top cover 6 Circle is equal with the concentric and diameter of distribution circle where the bolt hole of seat ring 1, and screw rod 5 is through the flange of top cover 6 and screws in the spiral shell of seat ring 1 In keyhole, nut 4 is arranged on screw rod 5, and rubber circle 7 is installed between top cover 6 and seat ring 1.Hydropower Unit pressure under different operating modes Luffing is excessive, or when unit vibration causes the nut 4 to loosen, causes to lose effective mechanical connection between top cover 6 and seat ring 1, Top cover 6 moves up vertically, the rubber between top cover 6 and seat ring 1 is justified 7 and loses sealing function, and press water overflows unit and enters factory building, Power station normal operation is influenceed, or even jeopardizes power station staff's personal safety.
For case above, the present invention sets about to ensure that in nut 4 pine occurs for Hydropower Unit emphatically from the following aspects It is dynamic, when causing to lose effective mechanical connection between top cover 6 and seat ring 1, do not interfere with unit normal operation, less entail dangers to electricity yet Stand staff's personal safety.
First, the section of spacing ring 2 is rectangular shaped as Figure 1 and Figure 4, is welded on seat ring 1.It is spacing as shown in Figure 2 The vertical view of ring 2 is sector structure.The internal diameter of 2 vertical plane of spacing ring 11 and the flange excircle of top cover 6 are concentric, and the internal diameter of 2 vertical plane of spacing ring 11 More than the flange excircle radius of top cover 6;The internal diameter of 2 facade of spacing ring 10 and the flange excircle of top cover 6 are concentric, and in the facade 10 of spacing ring 2 Footpath is more than the internal diameter of 2 vertical plane of spacing ring 11.The section of bolt block 3 is rectangular shaped as shown in Fig. 2, Fig. 5, is overlooked as sector structure, bolt The internal diameter of 3 vertical plane of block 12 and the flange excircle of top cover 6 are concentric, and the internal diameter of 3 vertical plane of bolt block 12 is less than the flange excircle radius of top cover 6; Bolt block 3 is vertical to face 13 internal diameters directly and the flange excircle of top cover 6 is concentric, and bolt block 3 is vertical faces 13 internal diameters directly more than the flange excircle of top cover 6 partly Footpath;The periphery 14 of bolt block 3 and the flange excircle of top cover 6 are concentric, and the radius of 3 periphery of bolt block 14 is less than the internal diameter of 2 facade of spacing ring 10.
Secondly, as shown in Figure 1 in the axial direction, certain interval is left between the lower plane 8 of spacing ring 2 and the flange of top cover 6, is used for Bolt block 3 is installed.On bolt block 3 certain interval is left between plane 9 and the lower plane 8 of spacing ring 2;On bolt block 3 under plane 9 and spacing ring 2 The gap of plane 8 is less than the sealing of rubber circle 7 and compresses thickness.When nut 4 loosens top cover 6 and moved up, rubber circle 7 still can be after Supervention waves sealing function.
Again, spacing ring 2 is circumferentially provided with multiple grooves, and bolt block 3 arrangement quantity should meet it is claimed below:First, Spacing ring 2, bolt block 3 should have enough intensity, to ensure that hydraulic thrust acts on bolt by top cover 6 when nut 4 loosens On block 3, spacing ring 2, bolt block 3 and spacing ring 2 will not fail, and can play safety protection function.Second, spacing ring 2, bolt block 3 There should be enough rigidity, to ensure that hydraulic thrust acts on bolt block 3, spacing ring 2 by top cover 6 when nut 4 loosens On, the elastic deformation amount that bolt block 3, spacing ring 2 occur is less than the crush of rubber circle 7, makes rubber circle 7 can continue to play sealing Effect.
Finally, when 4 normal work of nut, the pretightning force of screw rod 5 is acted on top cover 6 by nut 4.When nut 4 is sent out During raw loosening, safety device functions to, and now top cover 6 moves axially upwards in hydraulic thrust effect lower edge, drives bolt Block 3 moves up therewith, due to the position-limiting action of spacing ring 2, makes top cover 6 be only capable of producing small axial displacement.Spacing ring 2 limits simultaneously The radial displacement of bolt block 3 has been made, has ensured that bolt block 3 in the gap of spacing ring 2 and top cover 6, ensures between top cover 6 and seat ring 1 all the time The effective crush mechanically connected with rubber circle 7, protects unit safety operation.
The technique effect of the present invention:
The pretightning force of screw rod 5 is acted on top cover 6 by nut 4, is ensured that rubber circle 7 plays sealing function, is made press water It will not overflow.When nut 4 loosens, safety device is embodied by following several respects:Top cover 6 drives the edge of bolt block 3 Move axially upwards, plane 9 on bolt block 3 is contacted with the lower plane 8 of spacing ring 2, can because the mechanical position limitation of spacing ring 2 acts on To limit the axial displacement of top cover 6.Secondly, screw rod 5 is screwed in through top cover 6 in the screwed hole of seat ring 1, and spacing ring 2 is spacing Effect, when nut 4 loosens, the radial displacement of top cover 6 and it is circumferentially displaced limited, can so as to ensure to have between top cover 6 and seat ring 1 The mechanical connection leaned on, ensure that rubber circle 7 can continue to play sealing function, the press water in passage is not overflowed unit, rise To the effect of protection unit safety.
Brief description of the drawings
Fig. 1 is safety device installation diagram
Fig. 2 is safety device top view
Fig. 3 is existing conventional Hydropower Unit top cover, stay ring installation structure chart
Fig. 4 is spacing ring sectional view disclosed by the invention
Fig. 5 is bolt block sectional view disclosed by the invention
Embodiment
As shown in figure 1, present invention increase safety protection structure spacing ring 2 and bolt block 3.The section of spacing ring 2 is square Shape, multiple grooves are along the circumferential direction provided with, be welded on seat ring 1.As shown in Fig. 2 the vertical view of spacing ring 2 is sector structure.Limit The internal diameter of position 2 vertical plane of ring 11 and the flange excircle of top cover 6 are concentric, and the internal diameter of 2 vertical plane of spacing ring 11 is more than the flange excircle radius of top cover 6; The internal diameter of 2 facade of spacing ring 10 and the flange excircle of top cover 6 are concentric, and the internal diameter of 2 facade of spacing ring 10 is more than in the vertical plane 11 of spacing ring 2 Footpath.In the axial direction, certain interval is left between the lower plane 8 of spacing ring 2 and the flange of top cover 6, for installing bolt block 3.Such as Fig. 5 institutes Showing, the section of bolt block 3 is rectangular shaped, is overlooked as sector structure, and the internal diameter of 3 vertical plane of bolt block 12 and the flange excircle of top cover 6 are concentric, And the internal diameter of 3 vertical plane of bolt block 12 is less than the flange excircle radius of top cover 6;Bolt block 3 is vertical to face 13 internal diameters directly and the flange excircle of top cover 6 is same The heart, and bolt block 3 is vertical faces 13 internal diameters directly and be more than the flange excircle radius of top cover 6;The periphery 14 of bolt block 3 and the flange excircle of top cover 6 are concentric, And the radius of 3 periphery of bolt block 14 is less than the internal diameter of 2 facade of spacing ring 10;Bolt block 3 is placed in below the lower plane 8 of spacing ring 2, by spacing The groove of ring 2 loads, and along the circumferential direction screws in below the lower plane 8 of spacing ring 2.In the axial direction, plane 9 on bolt block 3 Less than the lower plane 8 of spacing ring 2;The gap of plane 9 and the lower plane 8 of spacing ring 2 is less than the sealing compression thickness of rubber circle 7 on bolt block 3. The particular number and size of bolt block 3 determine according to the structure type and force-bearing situation of unit.When 4 normal work of nut, screw rod 5 Pretightning force acted on by nut 4 on top cover 6.When nut 4 loosens, safety device functions to.Now Top cover 6 moves axially upwards in hydraulic thrust effect lower edge, promotes bolt block 3 to move up therewith, due to the position-limiting action of spacing ring 2, makes Top cover 6 is only capable of producing small axial displacement.The sealing for being less than rubber circle 7 between top cover 6 and seat ring 1 due to this displacement compresses thickness Degree, sealing still play a role.So as to ensure that Hydropower Unit loosens in nut 4, cause to lose between top cover 6 and seat ring 1 effectively Mechanical connection when, unit remains to safe operation.

Claims (2)

1. a kind of Hydropower Unit top cover safety device, it is characterized in that:Spacing ring (2) section is rectangular shaped, spacing ring (2) Overlook and be circumferentially provided with multiple grooves for sector, spacing ring (2), spacing ring (2) is welded on seat ring (1);Bolt block (3) section is Rectangular shaped, bolt block (3) are overlooked as sector;Several bolt blocks (3) are screwed in by spacing ring (2) groove and are placed in spacing ring (2) lower plane (8) below, has certain axial gap on bolt block (3) between plane (9) and spacing ring (2) lower plane (8);Bolt block (3) It is placed in above top cover (6).
2. a kind of Hydropower Unit top cover safety device according to claim 1, it is characterized in that:Spacing ring (2) facade (10) internal diameter and top cover (6) flange excircle are concentric, and spacing ring (2) facade (10) internal diameter is more than top cover (6) flange excircle radius; Spacing ring (2) vertical plane (11) internal diameter and top cover (6) flange excircle are concentric, and spacing ring (2) vertical plane (11) internal diameter is less than spacing ring (2) Facade (10) internal diameter, and spacing ring (2) vertical plane (11) internal diameter is more than top cover (6) flange excircle radius;Bolt block (3) vertical plane (12) Internal diameter and top cover (6) flange excircle are concentric, and bolt block (3) vertical plane (12) internal diameter is less than top cover (6) flange excircle radius;Bolt block (3) stand and face (13) internal diameter directly and top cover (6) flange excircle is concentric, and bolt block (3) stands and faces (13) internal diameter directly and be more than top cover (6) flange Exradius;Bolt block (3) periphery (14) external diameter and top cover (6) flange excircle are concentric, and bolt block (3) periphery (14) external diameter is small In spacing ring (2) facade (10) internal diameter.
CN201710958772.XA 2017-10-16 2017-10-16 Hydropower Unit top cover safety device Active CN107476924B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710958772.XA CN107476924B (en) 2017-10-16 2017-10-16 Hydropower Unit top cover safety device

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Application Number Priority Date Filing Date Title
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CN107476924B CN107476924B (en) 2019-08-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109915304A (en) * 2019-03-18 2019-06-21 哈尔滨电机厂有限责任公司 A kind of pump-storage generator safeguard construction
CN110195676A (en) * 2019-03-18 2019-09-03 哈尔滨电机厂有限责任公司 A kind of safe brake gear of pump-storage generator top cover

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202301386U (en) * 2011-11-04 2012-07-04 刘若楠 Anti-loosening structure for automobile hub
CN202899100U (en) * 2012-10-24 2013-04-24 哈尔滨电机厂有限责任公司 Human-in door opening resistant device
CN104819197A (en) * 2015-04-24 2015-08-05 浙江长兴前进机械铸造有限公司 Loosening prevention nut connecting structure
JP2016138540A (en) * 2015-01-27 2016-08-04 吉野電業株式会社 Power generator device and hydraulic generating equipment
CN106640913A (en) * 2016-09-13 2017-05-10 杭州斯泰新材料技术有限公司 Fastener, manufacturing method and locking and unlocking method of fastener

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202301386U (en) * 2011-11-04 2012-07-04 刘若楠 Anti-loosening structure for automobile hub
CN202899100U (en) * 2012-10-24 2013-04-24 哈尔滨电机厂有限责任公司 Human-in door opening resistant device
JP2016138540A (en) * 2015-01-27 2016-08-04 吉野電業株式会社 Power generator device and hydraulic generating equipment
CN104819197A (en) * 2015-04-24 2015-08-05 浙江长兴前进机械铸造有限公司 Loosening prevention nut connecting structure
CN106640913A (en) * 2016-09-13 2017-05-10 杭州斯泰新材料技术有限公司 Fastener, manufacturing method and locking and unlocking method of fastener

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109915304A (en) * 2019-03-18 2019-06-21 哈尔滨电机厂有限责任公司 A kind of pump-storage generator safeguard construction
CN110195676A (en) * 2019-03-18 2019-09-03 哈尔滨电机厂有限责任公司 A kind of safe brake gear of pump-storage generator top cover

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