CN104315147B - A kind of power type non-contact type main shaft sealing device - Google Patents

A kind of power type non-contact type main shaft sealing device Download PDF

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Publication number
CN104315147B
CN104315147B CN201410444081.4A CN201410444081A CN104315147B CN 104315147 B CN104315147 B CN 104315147B CN 201410444081 A CN201410444081 A CN 201410444081A CN 104315147 B CN104315147 B CN 104315147B
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CN
China
Prior art keywords
main shaft
seal
seal receptacle
sealing device
maintenance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201410444081.4A
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Chinese (zh)
Other versions
CN104315147A (en
Inventor
赵绍勇
许知海
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DEC DONGFENG ELECTRIC MACHINERY Co Ltd
Original Assignee
DEC DONGFENG ELECTRIC MACHINERY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DEC DONGFENG ELECTRIC MACHINERY Co Ltd filed Critical DEC DONGFENG ELECTRIC MACHINERY Co Ltd
Priority to CN201410444081.4A priority Critical patent/CN104315147B/en
Publication of CN104315147A publication Critical patent/CN104315147A/en
Application granted granted Critical
Publication of CN104315147B publication Critical patent/CN104315147B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/16Sealings between relatively-moving surfaces
    • F16J15/40Sealings between relatively-moving surfaces by means of fluid
    • F16J15/406Sealings between relatively-moving surfaces by means of fluid by at least one pump

Abstract

The invention discloses a kind of power type non-contact type main shaft sealing device, it includes main shaft (9), it is arranged with pump plate (3) on described main shaft (9), left-hand thread groove (8) is offered on described pump plate (3), described pump plate (3) is positioned at cover plate (7) and the space of seal receptacle (2), the upper end of cover plate (7) connects many drain pipies (6), cover plate (7) is connected with seal receptacle (2) by bolt, seal receptacle (2) is bolted with main spindle coupling (1), a seal groove (10) is offered on described seal receptacle (2), one maintenance is installed in seal groove (10) and seals (4), maintenance seals and is provided with a sealing gland (5) on (4), sealing gland (5) is connected with seal receptacle (2) by bolt.The invention has the beneficial effects as follows: it has prolongation main shaft seal service life, is easily installed and advantage easy to maintenance.

Description

A kind of power type non-contact type main shaft sealing device
Technical field
The present invention relates to high concentration of sediment generator main shaft sealer, particularly a kind of power type non-contact type main shaft sealing device.
Background technology
The contactless sealing of labyrinth seal groove is worn in main shaft seal pattern such as hydraulic type end face seal that the hydraulic turbine uses, the sealing of contact packing filling, spring self compensation end face seal, babbitt metal bearing.Above seal style the most inapplicable high concentration of sediment power station.
Current domestic many power stations or developed by upstream are affected, or affected by vegetation deterioration, water quality sediment charge increases, unit operation condition becomes severe, especially run the old unit of more than ten years, commonly used traditional hydraulic type or spring end face seal, increasingly affected by water degradation, unit water leakage increases, it is often forced to shut down, sealing block cannot be used to a time between overhauls(TBO) by sand erosion, some power stations main shaft seal complete failure, frequently adjust the wear-out part that changing main-spindle seals, such vicious cycle considerably increases the workload of maintainer, especially flood season, water is more, it should be the harvest time in power station, but the main shaft seal leakage accident that in flood season, the increase of water quality sediment charge causes has a strong impact on the normal safe stable operation of unit, directly affect the economic benefit in power station.Improve the reliability of high concentration of sediment power station main shaft seal, stability has become global research topic.
Summary of the invention
It is an object of the invention to overcome the shortcoming of prior art, it is provided that a kind of extend main shaft seal service life, be easily installed and power type non-contact type main shaft sealing device easy to maintenance.
The purpose of the present invention is achieved through the following technical solutions: a kind of power type non-contact type main shaft sealing device, it includes main shaft, pump plate it is arranged with on described main shaft, left-hand thread groove is offered on described pump plate, described pump plate is positioned at the space of cover plate and seal receptacle, the upper end of cover plate connects many drain pipies, cover plate is connected with seal receptacle by bolt, seal receptacle is bolted with main spindle coupling, a seal groove is offered on described seal receptacle, one maintenance is installed in seal groove seal, maintenance is provided with a sealing gland on sealing, sealing gland is connected with seal receptacle by bolt.
Described drain pipe is four.
Described seal receptacle radially offers single order ladder shell pit, and ladder screwed hole female thread connects a screw rod, and screw front end pushes against maintenance and seals.
The described left-hand thread groove on pump plate is four, and is shaped as U-shaped.
The invention have the advantages that the contactless sealing of the power type non-contact type main shaft seal various conventional of the present invention, it is that it is a kind of dynamic seal, it is that the principle utilizing the lift of pump plate and helical pump generation to form the resistance that leaks carrys out water shutoff, gap between rotatable parts and fixed part is bigger, monolateral gap is up to 1.3 ~ 1.5mm, and bigger gap can alleviate sand erosion, extends main shaft seal service life, simultaneously facilitate installation, easy to maintenance.
Accompanying drawing explanation
Fig. 1 Structural representation for the present invention
In figure, 1-main spindle coupling, 2-seal receptacle, 3-pump plate, 4-overhauls sealing, 5-sealing gland, 6-drain pipe, 7-cover plate, 8-left-hand thread groove, 9-main shaft, 10-seal groove, 11-screwed hole, 12 screw rods.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings, and protection scope of the present invention is not limited to the following stated:
nullAs shown in Figure 1,A kind of power type non-contact type main shaft sealing device,It includes main shaft 9,It is arranged with pump plate 3 on described main shaft 9,The described pump plate 3 that pump plate 3 is helical pump,Left-hand thread groove 8 is offered on described pump plate 3,Left-hand thread groove 8 on pump plate 3 is four,And it is shaped as U-shaped,Constitute helical pump with cover plate 7 upwards to draw water to form the resistance that leaks,Described pump plate 3 is positioned at cover plate 7 and the space of seal receptacle 2,The upper end of cover plate 7 connects many drain pipies 6,Described drain pipe 6 is four,Model is DN25,The drain pipe 6 emergency drainage pipe in machine is cheated introduces sump,To reduce the inlet pressure of helical pump,Cover plate 7 is connected with seal receptacle 2 by bolt,Seal receptacle 2 is bolted with main spindle coupling 1,So seal receptacle 2、Pump plate 3、Left-hand thread groove 8 rotates together with main shaft with cover plate 7,A seal groove 10 is offered on described seal receptacle 2,One maintenance is installed in seal groove 10 and seals 4,Maintenance seals and is provided with a sealing gland 5 on 4,Sealing gland 5 is connected with seal receptacle 2 by bolt.Described seal receptacle 2 radially offers single order ladder shell pit 11, and ladder screwed hole 11 female thread connects a screw rod 12, and screw rod 12 front end pushes against maintenance sealing 4, makes maintenance seal 4 and fills up the space between sealing gland 5 and seal receptacle 2, forms good water seal effect.
In the present embodiment, pump plate 3, left-hand thread groove 8 rotate with rotatable parts with cover plate 7, and pump leaf, viewed from the side in 25 ° of oblique angles, enters into the water of main shaft seal from runner and produces a downward resistance under revolving force effect;Processing 4 U-shaped left-hand thread grooves 8 on the inner side of pump plate 3, constitute helical pump with cover plate 7 and upwards draw water, leak resistance to be formed, on cover plate 7,4 DN25 drain pipies 6 emergency drainage pipe in machine is cheated introduces sump, to reduce the inlet pressure of helical pump in succession.Vane pump and helical pump power source are provided by unit rotatable parts, and generating unit speed is the highest, and the lift resistance that vane pump and helical pump produce is the biggest, and sealing property is more preferable.

Claims (4)

  1. null1. a power type non-contact type main shaft sealing device,It is characterized in that: it includes main shaft (9),It is arranged with pump plate (3) on described main shaft (9),Left-hand thread groove (8) is offered on described pump plate (3),Described pump plate (3) is positioned at cover plate (7) and the space of seal receptacle (2),Pump leaf is viewed from the side in 25 ° of oblique angles,Enter into the water of main shaft seal from runner under revolving force effect, produce a downward resistance,The upper end of cover plate (7) connects many drain pipies (6),Cover plate (7) is connected with seal receptacle (2) by bolt,Seal receptacle (2) is bolted with main spindle coupling (1),A seal groove (10) is offered on described seal receptacle (2),One maintenance is installed in seal groove (10) and seals (4),Maintenance seals and is provided with a sealing gland (5) on (4),Sealing gland (5) is connected with seal receptacle (2) by bolt.
  2. A kind of power type non-contact type main shaft sealing device the most according to claim 1, it is characterised in that: described drain pipe (6) is four.
  3. A kind of power type non-contact type main shaft sealing device the most according to claim 1, it is characterized in that: described seal receptacle (2) radially offers single order ladder shell pit (11), ladder screwed hole (11) female thread connects a screw rod (12), and screw rod (12) front end pushes against maintenance and seals (4).
  4. A kind of power type non-contact type main shaft sealing device the most according to claim 1, it is characterised in that: the described left-hand thread groove (8) on pump plate (3) is four, and is shaped as U-shaped.
CN201410444081.4A 2014-09-03 2014-09-03 A kind of power type non-contact type main shaft sealing device Expired - Fee Related CN104315147B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410444081.4A CN104315147B (en) 2014-09-03 2014-09-03 A kind of power type non-contact type main shaft sealing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410444081.4A CN104315147B (en) 2014-09-03 2014-09-03 A kind of power type non-contact type main shaft sealing device

Publications (2)

Publication Number Publication Date
CN104315147A CN104315147A (en) 2015-01-28
CN104315147B true CN104315147B (en) 2016-08-24

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108680219B (en) * 2018-08-14 2023-10-31 宁波时代仪表有限公司 Down-loading frost crack prevention water meter
CN109483759A (en) * 2018-12-29 2019-03-19 温州市泽程机电设备有限公司 A kind of polyurethane electric heating tank body

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006322342A (en) * 2005-05-17 2006-11-30 Toshiba Corp Shaft seal device of hydraulic machinery
CN201884185U (en) * 2010-09-28 2011-06-29 湖南云箭集团有限公司 Principal shaft sealing device
CN201916241U (en) * 2010-12-16 2011-08-03 福建南电股份有限公司 Sealing structure of multi-stage pump plate
CN102251915A (en) * 2011-06-24 2011-11-23 武汉大学 Axial flow water turbine paddle adjustor
CN202300792U (en) * 2011-10-18 2012-07-04 韦金芳 Main shaft seal device of hydroelectric generating set
CN203258066U (en) * 2013-05-17 2013-10-30 兰州电机股份有限公司 Main shaft working sealing device of horizontal water turbine
CN203516734U (en) * 2013-06-17 2014-04-02 杭州诚德发电设备有限公司 Rotary spiral non-contact main shaft sealing mechanism
CN203500467U (en) * 2013-10-12 2014-03-26 北京华美聚合物有限公司 Sealing device of screw extruder

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Granted publication date: 20160824

Termination date: 20190903