CN202955024U - Long-axis pump with reverse auxiliary impeller - Google Patents

Long-axis pump with reverse auxiliary impeller Download PDF

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Publication number
CN202955024U
CN202955024U CN 201220709870 CN201220709870U CN202955024U CN 202955024 U CN202955024 U CN 202955024U CN 201220709870 CN201220709870 CN 201220709870 CN 201220709870 U CN201220709870 U CN 201220709870U CN 202955024 U CN202955024 U CN 202955024U
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CN
China
Prior art keywords
pump
shaft
pump shaft
long
impeller
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Active
Application number
CN 201220709870
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Chinese (zh)
Inventor
康秀峰
唐文平
陈志军
聂雄杰
刘小明
李小勇
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HUNAN CREDO PUMP CO Ltd
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HUNAN CREDO PUMP CO Ltd
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Priority to CN 201220709870 priority Critical patent/CN202955024U/en
Application granted granted Critical
Publication of CN202955024U publication Critical patent/CN202955024U/en
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Abstract

The utility model discloses a long-axis pump with a reverse auxiliary impeller. The long-axis pump comprises a space guide blade, an impeller, a bearing, a pump shaft, a mechanical seal shaft sleeve, a reverse auxiliary impeller and a mechanical seal gland, wherein the lower part of the pump shaft is arranged inside the space guide blade through the bearing, the bearing is located in the axial direction of the pump shaft by the mechanical seal shaft sleeve sleeved on the pump shaft, the spring is arranged on the outer side of the mechanical seal shaft sleeve, the lower end of the spring presses a spring pad, the spring pad is positioned in a first sealing groove of the mechanical seal gland, a sealing ring is arranged in the first sealing groove, a second sealing groove is formed in the inner hole wall of the mechanical seal gland, a framework seal is arranged in the second sealing groove, the mechanical seal gland is screwed with the space guide blade, the impeller is arranged at the lower end of the pump shaft and is connected with the pump shaft through a key, and the reverse auxiliary impeller is arranged on the pump shaft though an impeller nut. The long-axis pump is good in sealing property, and has the advantages of reducing the vibration of the front section of the pump shaft, improving the operation stability, enhancing the use property of the pump shaft, and prolonging the service life.

Description

A kind of long-shaft pump with reverse sub-propeller
Technical field
The utility model relates to a kind of long-shaft pump, especially relates to a kind of long-shaft pump with reverse sub-propeller.
Background technique
Long-shaft pump refers to the pump shaft general designation of longer pump series products comparatively speaking, and China's regulation major axis refers to single axle or the many shafting systems that axle forms that need three and three above supporting points.Long-shaft pump is mainly used in the every field such as farmland discharging-irrigating, flood control, water drainage, sewage treatment, power station (coal fired power plant, nuclear power station, storage station, tidal power station), cooling system.
By blade wheel structure, divide, long-shaft pump can be divided into open type long-shaft pump, semi-open type long-shaft pump and enclosed long-shaft pump etc.; Come minute by the impeller kind, can be divided into centrifugal, mixed-flow and axial flow long-shaft pump etc.; Divide by pressurized water chamber structure, can be divided into again scroll casing type and guide-vane long-shaft pump etc.In the last few years, lot of domestic and foreign producer gradually adopts spatial guide blade to replace the delivery chamber of spiral case as long-shaft pump, make part-structure full symmetric under long-shaft pump liquid, avoided lateral row to go wrong, also eliminated the problem that may cause because of asymmetric thermal expansion under particular job condition.Yet find in actual applications, although spatial guide blade formula long-shaft pump is widely used, exist the problem that pump efficiency is on the low side, the life-span of axle is short.The efficiency of spatial guide blade formula long-shaft pump is on the low side, is mainly the problem due to the spatial guide blade structure, can consume high, operating cost is higher; The poor sealing performance of existing sealing configuration, make pump shaft become the parts that usually easily go wrong in engineering reality.The stressing conditions relative complex of long-shaft pump pump shaft, not only have the moment of flexure moment of torsion, in some cases, also has sizable axial force.In the working procedure of pump, pump shaft also will be subject to the impact of various power simultaneously, and its intensity, vibration state etc. are directly connected to operation stability and the reliability of long-shaft pump, have even determined working condition and the working life of whole pump.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of good seal performance, and can improve the long-shaft pump with reverse sub-propeller in working life.
The utility model is achieved through the following technical solutions: comprise spatial guide blade, impeller, bearing, pump shaft, machine envelope axle sleeve, reverse sub-propeller and machine sealed cover, described pump shaft bottom is arranged on spatial guide blade inside by bearing, bearing is axially located by the machine envelope axle sleeve be sleeved on pump shaft on pump shaft, machine envelope inner hole of shaft sleeve wall is provided with seal groove, in seal groove, establishes by seal ring; The machine envelope axle sleeve outside is provided with spring, the lower end holddown spring cushion block of spring, and the spring cushion block is positioned at the first seal groove of machine sealed cover, in the first seal groove of machine sealed cover, is provided with seal ring, is positioned at the below of spring cushion block; The inner hole wall of machine sealed cover is provided with the second seal groove, in the second seal groove, is provided with reinforced seal, and the machine sealed cover is sleeved on axle, with spatial guide blade, is spirally connected; Described impeller peace turns the lower end at pump shaft, by key, with pump shaft, is connected, and axially, by the impeller nut location of reverse sub-propeller, reverse sub-propeller is arranged on pump shaft by impeller nut.
In the above-mentioned long-shaft pump with reverse sub-propeller, described key is flat key.
In the above-mentioned long-shaft pump with reverse sub-propeller, described impeller has sealing chamber, and oiling agent is arranged in sealing chamber, and oiling agent can cooling, lubricated spring, spring cushion block and rubber seal coil assembly.
Compared with prior art, the beneficial effects of the utility model are:
1. the utility model is provided with reverse sub-propeller; during the pump shaft rotation; reverse sub-propeller counter-rotating, make hydraulic pressure downward, changes flow direction in spatial guide blade; make pump shaft stressed more even; improved the impeller water-taking efficiency, and sub-propeller can smash the foreign material that enter the spatial guide blade inner chamber, play the effect of protection pump shaft and bearing unit; improve the usability of pump shaft, extended the working life of pump.
2. the utility model adopts spring to add General Purpose Rubber seal ring sealing means, installation, convenient disassembly, good seal performance, and can effectively reduce pump shaft leading portion partial vibration, improve the utility model traveling comfort, improved the usability of pump shaft, extended working life of the present utility model.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1. connecting tube; 2. pillar; 3. pump shaft; 4. bearing unit; 5. spring; 6. spring cushion block; 7. machine sealed cover; 71. the first seal groove; 72. the second seal groove; 8. spatial guide blade; 9. bolt; 10. bolt; 11. impeller pedestal; 12. reverse sub-propeller; 13. impeller nut; 14. impeller; 15. flat key; 16. outside framework oil seal; 17. sealing chamber; 18. rubber seal; 19. axle sleeve; 191. seal groove; 20. lock bolt.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, the utility model comprises spatial guide blade 8, impeller 14, bearing 4, pump shaft 3, machine envelope axle sleeve 19, reverse sub-propeller 12 and machine sealed cover 7, described pump shaft 3 bottoms are arranged on spatial guide blade 8 inside by bearing 4, bearing 4 is axially located by the machine envelope axle sleeve 19 be sleeved on pump shaft 3 on pump shaft 3, machine envelope axle sleeve 19 inner hole walls are provided with seal groove 191, are provided with rubber seal 18 in seal groove 191; Machine envelope axle sleeve 19 outsides are provided with spring 5, the lower end holddown spring cushion block 6 of spring 5, spring cushion block 6 is positioned at the first seal groove 71 of machine sealed cover 7, also be provided with rubber seal 18 in the first seal groove 71 of machine sealed cover 7, be positioned at the below of spring cushion block 6, under spring 5 elastic force effects, General Purpose Rubber seal ring 18 is compacted and plays seal action.The inner hole wall of machine sealed cover 7 is provided with in the second seal groove 72, the second seal grooves 72 and is provided with reinforced seal 16, and machine sealed cover 7 is sleeved on pump shaft 3, with spatial guide blade 8, by screw 9, is connected.Described impeller 14 peaces turn in the lower end of pump shaft 3, by flat key 15, with pump shaft 3, are connected, and axially, by impeller nut 13 location of reverse sub-propeller 12, reverse sub-propeller 12 is arranged on pump shaft 3 by impeller nut 13.
Spatial guide blade 8 is provided with sealing chamber 17, in sealing chamber 17, oiling agent is arranged, and oiling agent can be cooling, lubricated spring 5, spring cushion block 6 and rubber seal 18, played the effect of protection pump shaft 3 and bearing 4.
The utility model has adopted split type sealing configuration, and assembling and dismounting are comparatively simple, good sealing effect, and cracky not, convenient for maintaining, can obviously improve sealing effect of the present utility model and working life.

Claims (4)

1. the long-shaft pump with reverse sub-propeller, it is characterized in that: comprise spatial guide blade, impeller, bearing, pump shaft, machine envelope axle sleeve, reverse sub-propeller and machine sealed cover, described pump shaft bottom is arranged on spatial guide blade inside by bearing, bearing is axially located by the machine envelope axle sleeve be sleeved on pump shaft on pump shaft, machine envelope inner hole of shaft sleeve wall is provided with seal groove, in seal groove, establishes by seal ring; The machine envelope axle sleeve outside is provided with spring, the lower end holddown spring cushion block of spring, and the spring cushion block is positioned at the first seal groove of machine sealed cover, in the first seal groove of machine sealed cover, is provided with seal ring, is positioned at the below of spring cushion block; The inner hole wall of machine sealed cover is provided with the second seal groove, in the second seal groove, is provided with reinforced seal, and the machine sealed cover is sleeved on axle, with spatial guide blade, is spirally connected; Described impeller peace turns the lower end at pump shaft, by key, with pump shaft, is connected, and axially, by the impeller nut location of reverse sub-propeller, reverse sub-propeller is arranged on pump shaft by impeller nut.
2. the long-shaft pump with reverse sub-propeller as claimed in claim 1, it is characterized in that: described key is flat key.
3. the long-shaft pump with reverse sub-propeller as claimed in claim 1, it is characterized in that: described spatial guide blade is provided with sealing chamber, and oiling agent is arranged in sealing chamber.
4. the long-shaft pump with reverse sub-propeller as claimed in claim 1, it is characterized in that: described seal ring is rubber seal.
CN 201220709870 2012-12-20 2012-12-20 Long-axis pump with reverse auxiliary impeller Active CN202955024U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220709870 CN202955024U (en) 2012-12-20 2012-12-20 Long-axis pump with reverse auxiliary impeller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220709870 CN202955024U (en) 2012-12-20 2012-12-20 Long-axis pump with reverse auxiliary impeller

Publications (1)

Publication Number Publication Date
CN202955024U true CN202955024U (en) 2013-05-29

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ID=48460600

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220709870 Active CN202955024U (en) 2012-12-20 2012-12-20 Long-axis pump with reverse auxiliary impeller

Country Status (1)

Country Link
CN (1) CN202955024U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103452910A (en) * 2013-06-25 2013-12-18 江苏大学 Staggered centrifugal pump spatial guide vane
CN103758761A (en) * 2014-01-17 2014-04-30 新乡学院 Double-stage non-clogging sewage pump
CN104963897A (en) * 2015-07-07 2015-10-07 湖南南方长河泵业有限公司 New space guide blade device used for vertical installation of long-shaft pump

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103452910A (en) * 2013-06-25 2013-12-18 江苏大学 Staggered centrifugal pump spatial guide vane
CN103452910B (en) * 2013-06-25 2016-01-20 江苏大学 A kind of staggered centrifugal pump space guide vane body
CN103758761A (en) * 2014-01-17 2014-04-30 新乡学院 Double-stage non-clogging sewage pump
CN103758761B (en) * 2014-01-17 2016-05-18 新乡学院 Twin-stage is without stopping up sewage pump
CN104963897A (en) * 2015-07-07 2015-10-07 湖南南方长河泵业有限公司 New space guide blade device used for vertical installation of long-shaft pump

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