CN105971889A - Forced circulation pump - Google Patents
Forced circulation pump Download PDFInfo
- Publication number
- CN105971889A CN105971889A CN201610014413.4A CN201610014413A CN105971889A CN 105971889 A CN105971889 A CN 105971889A CN 201610014413 A CN201610014413 A CN 201610014413A CN 105971889 A CN105971889 A CN 105971889A
- Authority
- CN
- China
- Prior art keywords
- impeller
- main shaft
- shaft sleeve
- pump
- face
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a forced circulation pump. The pump comprises a bearing box, a pump cover and a pump body which are connected successively, wherein a main shaft successively passes through the bearing box, an inner hole of the pump cover and an inner hole of the pump body to stretch into the pump body; the main shaft is connected to an impeller inside the pump body; a protective shaft sleeve sleeves the main shaft; the left end of the protective shaft sleeve is in a static sealing connection with an end face of the inner side of the impeller; the right end of the protective shaft sleeve stretches into the inner hole of the pump body; a mechanical seal shaft sleeve sleeves a fitting section between the main shaft and the pump cover inner hole; clearance between the mechanical seal shaft sleeve and the pump cover inner hole is filled with a seal assembly; the left section of the mechanical seal shaft sleeve is inserted into the protective shaft sleeve to form clearance fitting with the protective shaft sleeve; over one ring of O-shaped seal ring is disposed between the outer wall of the mechanical seal shaft sleeve and the inner wall of the protective shaft sleeve; a step face is disposed on the front section of the main shaft; a threaded section is disposed on the front end of the main shaft; the impeller is in a key connection with the front end of the main shaft; the back part of the impeller is pressed against and limited by the step face; a flange nut is in a rotary connection with the threaded section of the main shaft; the flange nut is pressed against the front end face of the impeller; multiple screw holes are uniformly distributed in a flange face of the flange nut; and the flange face and the front end face of the impeller are fastened and connected by a screw.
Description
Technical field
The present invention relates to a kind of circulating pump, be specifically related to the protection of a kind of band main shaft, the forced circulation pump of impeller connection fastening.
Background technology
There is due to the medium of forced circulation transport pump the characteristics such as high temperature, larger specific gravity and deep-etching, and pump main shaft is it is generally required to higher-strength and comprehensive mechanical performance requirement, therefore main shaft is effectively protected by protective shaft sleeve to be designed with for forced circulation pump.Tradition protective shaft sleeve method for designing: (one) flatulence of heat type set mode, will inlay the mode of a corrosion-resistant axle sleeve outside main shaft, and the program is non-dismountable, and needs secondary operations, complex process；(2) use matched in clearance with axle, and protect with impeller and pump shaft sleeve formation end face seal respectively at end face.But due to the impact of medium temperature, main shaft can occur axial expansion, frequently result in end face seal and lost efficacy, then cause main shaft shielding failure.
The feeding manner of forced circulation pump is divided into enterprising side to go out or side enter on go out two kinds, therefore the rotation direction of impeller there is also two ways (the most clockwise or counterclockwise) rotate.In order to ensure impeller when any of which rotates, impeller all can keep preferable tightening state, and generally impeller nut is locked and is designed with double nut design, thrust washer design etc..But, operationally there is larger axis to power due to forced circulation pump, after using a stage to exist, impeller the most easily occurs loosening, is easily caused equipment fault.
Summary of the invention
For solving deficiency of the prior art, it is an object of the invention to provide the protection of a kind of band main shaft, the forced circulation pump of impeller connection fastening.
The technical scheme that the present invention takes is:
A kind of forced circulation pump, including the bearing housing being sequentially connected with, pump cover and the pump housing, described main shaft sequentially passes through bearing housing, the endoporus of pump cover and the endoporus of the pump housing also stretch in the pump housing, main shaft is connected with the impeller in the pump housing, it is cased with protective shaft sleeve on described main shaft, the left end static seal of protective shaft sleeve is connected to impeller inner side end, the right-hand member of protective shaft sleeve stretches into pump housing endoporus, it is socketed with mechanical seal sleeve in described main shaft and pump cover inner hole section, it is filled with black box between mechanical seal sleeve and pump cover endoporus, with protective shaft sleeve matched in clearance in left section of insertion protective shaft sleeve of described mechanical seal sleeve, the O RunddichtringO that a circle is above it is provided with between the outer wall of mechanical seal sleeve and the inwall of protective shaft sleeve；The leading portion of described main shaft is provided with step surface, the front end of main shaft has been provided with thread segment, described impeller is by bonded front-end of spindle, impeller back and step surface push against spacing, it is connected with flange nut in described spindle thread section, described flange nut pushes against the front end face in impeller, the flange face of described flange nut does not the most have multiple screw hole, described flange face are fastenedly connected through screw with the front end face of impeller.
Further, the outside of described flange nut is covered with impeller cap, and flange nut is sealed in the closed chamber of impeller and the formation of impeller cap.
After taking above technical scheme, the invention have the benefit that
1. protective shaft sleeve and impeller end face are designed with static seal, use O as static seal, can effectively prevent medium contact main shaft from causing the corrosion of main shaft between protective shaft sleeve and mechanical seal sleeve；
2. axle sleeve and O contact site are designed with wear-resistant coating, it is ensured that axially wearability when displacement, increase the service life；Multilamellar O designs, it is achieved multiple protective；
3. leave certain interval in end face of shaft bush and protective shaft sleeve, can freely compensate the displacement that the axial expansion under main shaft high temperature causes, prevent protective shaft sleeve from interfering with mechanical seal sleeve.
4. on the outer circumference flange face of flange nut, it is designed with the tapped through hole of several (more than at least 1), and in uniform screwed hole, it is screwed into lock-screw (or bolt), after impeller nut according to the rules pretension, this clamping screw is tightened according still further to pretightning force and i.e. can reach locking effect.Impeller chimney in the outside mask of flange nut, carries out sealing protection to it.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is further described:
A kind of forced circulation pump, including the bearing housing 3 being sequentially connected with, pump cover 2, main shaft 4 pump housing 1 and impeller 9, described main shaft 4 sequentially passes through bearing housing 3, the endoporus of pump cover 2 and the endoporus of the pump housing 1 and stretches in the pump housing 1, and main shaft 1 is connected with the impeller 9 in pump 1 body.The leading portion of described main shaft 4 is provided with step surface, the front end of main shaft 4 has been provided with thread segment, described impeller 9 is connected to main shaft 4 by being bonded, impeller 9 back pushes against spacing with step surface, it is connected with flange nut 10 in the screw thread stricture of vagina section of described main shaft 4, described flange nut 10 pushes against the most multiple screw hole on the front end face of impeller 9, the flange face of described flange nut 10, and described flange face is fastenedly connected through the screw 12 through screw hole with the front end face of impeller 9.The outside of described flange nut 10 is covered with impeller cap 11, and flange nut 10 is sealed in the closed chamber of impeller 9 and impeller cap 11 formation.
Being cased with protective shaft sleeve 5 on described main shaft 1, the left end of protective shaft sleeve 5 is bowl-shape enlarging, and bowl-shape enlarging static seal is connected to the end face at impeller 9 back, and 5 right-hand members of protective shaft sleeve are provided with the cylindrical recesses caved in vertically, and the right-hand member of protective shaft sleeve 5 stretches into the pump housing 1 endoporus；Described main shaft 4 is socketed with mechanical seal sleeve 6 in pump cover 2 inner hole section, it is filled with black box 8 between described mechanical seal set 6 and pump cover 2 endoporus, in the cylindrical recesses of left section of insertion protective shaft sleeve 5 of described mechanical seal sleeve 6, mechanical seal sleeve 6 and the cylindrical recesses matched in clearance of protective shaft sleeve 5, it is provided with gap between the left side of mechanical seal sleeve 6 and the inner bottom surface of protective shaft sleeve 5 cylindrical recesses, between the outer wall of mechanical seal sleeve 6 and the inwall of protective shaft sleeve 5, is provided with the O RunddichtringO 7 that a circle is above.
Claims (2)
1. a forced circulation pump, including the bearing housing being sequentially connected with, pump cover and the pump housing, described main shaft sequentially passes through bearing housing, the endoporus of pump cover and the endoporus of the pump housing also stretch in the pump housing, main shaft is connected with the impeller in the pump housing, it is characterized in that, it is cased with protective shaft sleeve on described main shaft, the left end static seal of protective shaft sleeve is connected to impeller inner side end, the right-hand member of protective shaft sleeve stretches into pump housing endoporus, it is socketed with mechanical seal sleeve in described main shaft and pump cover inner hole section, it is filled with black box between mechanical seal sleeve and pump cover endoporus, with protective shaft sleeve matched in clearance in left section of insertion protective shaft sleeve of described mechanical seal sleeve, the O RunddichtringO that a circle is above it is provided with between the outer wall of mechanical seal sleeve and the inwall of protective shaft sleeve；The leading portion of described main shaft is provided with step surface, the front end of main shaft has been provided with thread segment, described impeller is by bonded front-end of spindle, impeller back and step surface push against spacing, it is connected with flange nut in described spindle thread section, described flange nut pushes against the front end face in impeller, the flange face of described flange nut does not the most have multiple screw hole, described flange face are fastenedly connected through screw with the front end face of impeller.
A kind of forced circulation pump the most according to claim 1, it is characterised in that the outside of described flange nut is covered with impeller cap, flange nut is sealed in the closed chamber of impeller and the formation of impeller cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610014413.4A CN105971889A (en) | 2016-01-11 | 2016-01-11 | Forced circulation pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610014413.4A CN105971889A (en) | 2016-01-11 | 2016-01-11 | Forced circulation pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105971889A true CN105971889A (en) | 2016-09-28 |
Family
ID=56988528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610014413.4A Pending CN105971889A (en) | 2016-01-11 | 2016-01-11 | Forced circulation pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105971889A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061347A (en) * | 2017-04-07 | 2017-08-18 | 兰州兰泵有限公司 | The impeller linking structure and its quick despatch method of a kind of centrifugal multistage pump multiple centrifugal pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000220653A (en) * | 1999-02-03 | 2000-08-08 | Itt Mfg Enterp Inc | Device for mounting a certain member on rotating shaft |
| CN201110265Y (en) * | 2007-11-12 | 2008-09-03 | 江苏江风氟合金泵阀制造有限公司 | Steel fluorine forced circulation pump |
| CN201679725U (en) * | 2010-04-01 | 2010-12-22 | 陈登云 | Desulfurization pump |
| CN202937503U (en) * | 2012-12-11 | 2013-05-15 | 上海水泵制造有限公司 | Axial suction impeller locknut device |
| CN205478355U (en) * | 2016-01-11 | 2016-08-17 | 欧技工业设备（江苏）有限公司 | Forced circulation pump |
-
2016
- 2016-01-11 CN CN201610014413.4A patent/CN105971889A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000220653A (en) * | 1999-02-03 | 2000-08-08 | Itt Mfg Enterp Inc | Device for mounting a certain member on rotating shaft |
| CN201110265Y (en) * | 2007-11-12 | 2008-09-03 | 江苏江风氟合金泵阀制造有限公司 | Steel fluorine forced circulation pump |
| CN201679725U (en) * | 2010-04-01 | 2010-12-22 | 陈登云 | Desulfurization pump |
| CN202937503U (en) * | 2012-12-11 | 2013-05-15 | 上海水泵制造有限公司 | Axial suction impeller locknut device |
| CN205478355U (en) * | 2016-01-11 | 2016-08-17 | 欧技工业设备（江苏）有限公司 | Forced circulation pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107061347A (en) * | 2017-04-07 | 2017-08-18 | 兰州兰泵有限公司 | The impeller linking structure and its quick despatch method of a kind of centrifugal multistage pump multiple centrifugal pump |
| CN107061347B (en) * | 2017-04-07 | 2023-05-12 | 兰州兰泵有限公司 | Impeller connecting structure of multistage centrifugal pump and quick assembling and disassembling method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160928 |
|
| WD01 | Invention patent application deemed withdrawn after publication |