CN207122435U - A kind of centrifugal pump with equilibrium centrifugation pump axial force mechanism - Google Patents
A kind of centrifugal pump with equilibrium centrifugation pump axial force mechanism Download PDFInfo
- Publication number
- CN207122435U CN207122435U CN201720762717.9U CN201720762717U CN207122435U CN 207122435 U CN207122435 U CN 207122435U CN 201720762717 U CN201720762717 U CN 201720762717U CN 207122435 U CN207122435 U CN 207122435U
- Authority
- CN
- China
- Prior art keywords
- impeller
- pump
- choma
- balance pipe
- back shroud
- 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
Links
Abstract
A kind of centrifugal pump with equilibrium centrifugation pump axial force mechanism, including the pump housing and the impeller assembly installed in pump housing inner chamber, impeller assembly are arranged on and stretched on the pump shaft of pump body, and the impeller assembly installation cavity gap of impeller assembly and pump body coordinates；Impeller assembly includes impeller, front shroud of impeller and back shroud of impeller, the outer face of back shroud of impeller is provided with central boss, its axial direction of the mounting hole interior edge of the pump housing is fixedly mounted with rear choma, the central boss gap of choma and choma centre bore after insertion coordinates afterwards, the preoral loop of choma and front shroud of impeller is coaxial afterwards, and the centre bore aperture of rear choma is more than preoral loop external diameter；Back shroud of impeller is provided with several circumferential equally distributed balance pipes, and the aperture of balance pipe is cumulative from outer end inboard end.The beneficial effects of the utility model are：Rotor axial power can be largely balanced, and reduces leakage rate, it is effectively improved flow regime in pump, so as to the operating efficiency and operation stability of elevator pump.
Description
Technical field
It the utility model is related to a kind of centrifugal pump with equilibrium centrifugation pump axial force mechanism.
Background technology
Centrifugal pump is to be rotated using impeller and make water that centrifugal motion occur come work, is widely used in national economy production
In.Water pump, due to flow of fluid in pump chamber, will necessarily produce dynamical reaction, thus pump work in normal operation to main shaft
When produce axial force be inevitable.Rotor produces axial displacement, causes phase attrition between sound portion in the presence of axial force
Damage, collision, cause water pump badly damaged.The presence of axial force can cause water pump can not long-time even running, reduce its use
Life-span and overall performance, even jeopardize the safety of operating personnel when serious.
In the prior art, rotor axial power is balanced using balancing frame, balancing drum and balance pipe more.For using balancing frame
Structure, its axial gap are minimum so that its application is limited, and is not suitable for liquid in the pump housing and is contained husky, dry turn of pump or pipeline pump
The operating modes such as the close gasification of interior liquid.For balancing drum structure, the gap between its sound portion, can not adjust automatically to be formulated during manufacture
Equilibrant force size.And using balanced hole structure come to balance rotor axial power be more commonly used economic method, but through balance pipe
Leak fluid and enter impeller main liquid stream mutually impact, normal flow regime in impeller can be destroyed, water pump anti-cavitation can be made
Hydraulic performance decline.However, also finding no people at present by changing choma peace weighing apparatus pore structure after centrifugal pump, it is engaged by both
Use, carry out active balance axial force of impeller.
The content of the invention
In order to solve the above technical problems, according to the design feature of centrifugal pump, the utility model proposes a kind of active balance from
The mechanism of heart pump axial force, rotor axial power can be largely balanced, and reduce leakage rate, be effectively improved flowing shape in pump
State, so as to the operating efficiency of elevator pump and the centrifugal pump with equilibrium centrifugation pump axial force mechanism of operation stability.
A kind of centrifugal pump with equilibrium centrifugation pump axial force mechanism described in the utility model, including the pump housing and be arranged on
The impeller assembly of pump housing inner chamber, the impeller assembly be arranged on stretch on the pump shaft of pump body, the impeller assembly with it is described
The impeller assembly installation cavity gap of pump body coordinates；The impeller assembly includes impeller, front shroud of impeller and back shroud of impeller,
The impeller is arranged in the cavity that the front shroud of impeller and the back shroud of impeller surround, and the back shroud of impeller
Rear portion forms balance cylinder, and balance cylinder and the suction eye of described back shroud are connected, and the outer face of the back shroud of impeller is set
There is central boss, it is characterised in that：Its axial direction of the mounting hole interior edge of the pump housing is fixedly mounted with rear choma, it is described after choma with after insertion
The central boss gap of choma centre bore coordinates, and the preoral loop of the rear choma and the front shroud of impeller is coaxial, and rear choma
Centre bore aperture be more than preoral loop external diameter；The back shroud of impeller is provided with several circumferential equally distributed balance pipes, described
The outer end of balance pipe and impeller assembly ft connection, the inner of balance pipe connects with impeller assembly inner chamber, and the hole of balance pipe
Footpath is cumulative from outer end inboard end.
The pore radius of the centre bore of choma is more than 2~3mm of radius of preoral loop afterwards.
The balance pipe be gradation type circular cone through hole, wherein one end aperture connect with the inner chamber of impeller assembly more than with
One end aperture of impeller exocoel connection.
The groove structure of shape of threads is provided with the hole inwall of balance pipe.
The aperture for balancing outer end of hole is 2~3mm, and the outer end of wherein balance pipe refers to balance pipe outside back shroud of impeller
One end of end face.
The inner aperture of balance pipe is 5~6mm, and wherein balance pipe the inner refers to balance pipe inside impeller fluid domain
One end.
Screw thread groove depth on balance pipe inwall is 1~2mm.
Operation principle of the present utility model is as follows：In the centrifugal pump course of work, impeller rotates at a high speed, convection body acting,
Fluid forms high pressure by impeller outlet, and high-pressure fluid is then flowed into the gap between back shroud of impeller and the pump housing again, high
After pressure fluid passes through rear choma, the flow velocity of high-pressure fluid can be slowed down, reduce leakage rate, and increase the resistance of high-pressure fluid, caused
Reduce Fluid pressure.Simultaneously because the internal diameter of rear choma is more than preoral loop external diameter, cause to be located at the portion outside choma in impeller
Point, its impeller inlet incoming is higher than pressure of the low-pressure fluid to back shroud of impeller for flowing through rear choma to the pressure of front shroud of impeller
Power, have the function that a part of rotor axial power of balance.Pass through balance pipe to be imported into impeller, with impeller inlet fluid phase
It is logical, pressure is reduce further, so as to reach the effect of balancing axial thrust.
The beneficial effects of the utility model are：Choma is arranged higher than preoral loop afterwards, can reduce impeller outlet high-pressure fluid
Pressure, a part of axial force of rotor is balanced, and reduce leakage rate.Then back shroud of impeller leads to the high-pressure fluid in pump housing gap
Cross this taper balanced hole structure, leakage rate can be reduced, simultaneously because on balance pipe inwall thread groove presence, can slow down
The flowing of high-pressure fluid, play a part of increasing fluid resistance, and further reduce leakage rate, improve the volume effect of pump
Rate, but also can stop the particulate matter in fluid, prevents it from entering in impeller, the flow passage components such as impeller are caused abrasion and
Scratch.High-pressure fluid is flowed into the one end being relatively large in diameter, high-pressure fluid by taper balance pipe by the less one end of diameter simultaneously
Speed from large to small, and then reduces the influence to impeller flow field stable state.
Brief description of the drawings
Fig. 1 is structure chart of the present utility model (part).
Fig. 2 be at Fig. 1 A after choma partial enlarged drawing.
Fig. 3 is balance pipe partial enlarged drawing at Fig. 1 B.
Embodiment
The utility model is further illustrated below in conjunction with the accompanying drawings
Referring to the drawings：
A kind of centrifugal pump with equilibrium centrifugation pump axial force mechanism described in the utility model of embodiment 1, including the pump housing 1 with
And the impeller assembly 2 installed in pump housing inner chamber, the impeller assembly 2 are arranged on and stretched on the pump shaft inside the pump housing 1, the impeller
Component 2 installs cavity gap with the impeller assembly 2 inside the pump housing 1 and coordinates 3；The impeller assembly 2 includes impeller, impeller protecgulum
Plate 21 and back shroud of impeller 22, the impeller are arranged on the cavity that the front shroud of impeller 21 and the back shroud of impeller 22 surround
In 23, and the rear portion of the back shroud of impeller 22 forms balance cylinder, the balance cylinder of described back shroud 22 and suction eye
It is connected, the outer face of the back shroud of impeller 22 is provided with central boss 221, and the inwall of the pump housing 1 is fixedly mounted with rear choma along its axial direction
24, the gap of central boss 221 of the rear choma 24 and choma centre bore after insertion coordinates, the rear choma 24 and the impeller
The preoral loop 211 of front shroud 21 is coaxial, and the centre bore aperture of rear choma 22 is more than the external diameter of preoral loop 211；The impeller bonnet
Plate 22 is provided with several circumferential equally distributed balance pipes 222, the outer end of the balance pipe 222 and the ft connection of impeller assembly 2,
The inner of balance pipe 222 connects with the inner chamber of impeller assembly 2, and the aperture of balance pipe 222 is cumulative from outer end inboard end.
The pore radius of the centre bore of choma is more than 2~3mm of radius of preoral loop 211 afterwards.
The balance pipe 222 is the circular cone through hole of gradation type, wherein one end aperture connected with the inner chamber of impeller assembly 2 is big
In one end aperture connected with impeller exocoel.
The groove structure of shape of threads is provided with the hole inwall of balance pipe 222.
The aperture of the outer end of balance pipe 222 is 2~3mm, and the outer end of wherein balance pipe refers to balance pipe close to impeller bonnet
One end of plate outer face.
The inner aperture of balance pipe 222 is 5~6mm, and wherein balance pipe the inner refers to balance pipe close to impeller fluid domain
One end of the inside.
Screw thread groove depth on the inwall of balance pipe 222 is 1~2mm.
As shown in figure 1, choma 24 is arranged in the cooperation position of back shroud of impeller 22 and the pump housing 1 after described；If the balance pipe
Dry is uniformly opened on back shroud of impeller circumferencial direction, makes in the high-pressure fluid and impeller in back shroud of impeller and pump housing gap
It is in fluid communication, has the function that to reduce pressure difference；As shown in Fig. 2 the deutostoma annulate shaft is bolted to the pump housing to uniform with 6
On, its height is higher than 2~3mm of preoral loop.
As shown in figure 3, the balanced hole structure is in cone-shaped hole structure, close to back shroud of impeller a diameter of 2~
3mm, a diameter of 5~6mm of the balance pipe inside impeller fluid domain, the length of horizontal direction is back shroud of impeller thickness.It is flat
Screw thread slot structure is provided with weighing apparatus hole inwall, screw thread 1~2mm of groove depth, is evenly arranged on balance pipe inwall.
When the centrifugal pump is operated, rotation makes fluid capacitation to impeller at a high speed, forms high-pressure fluid by impeller outlet, and pass through successively
Later the gap between choma, back shroud of impeller and the pump housing, balance pipe, finally flow into impeller, with impeller inlet fluid phase
Connection, so as to reduce pressure differential.
Operation principle of the present utility model is as follows：In the centrifugal pump course of work, impeller rotates at a high speed, convection body acting,
Fluid forms high pressure by impeller outlet, and high-pressure fluid is then flowed into the gap between back shroud of impeller and the pump housing again, high
After pressure fluid passes through rear choma, the flow velocity of high-pressure fluid can be slowed down, reduce leakage rate, and increase the resistance of high-pressure fluid, caused
Reduce Fluid pressure.Simultaneously because the internal diameter of rear choma is more than preoral loop external diameter, cause to be located at the portion outside choma in impeller
Point, its impeller inlet incoming is higher than pressure of the low-pressure fluid to back shroud of impeller for flowing through rear choma to the pressure of front shroud of impeller
Power, have the function that a part of rotor axial power of balance.Pass through balance pipe to be imported into impeller, with impeller inlet fluid phase
It is logical, pressure is reduce further, so as to reach the effect of balancing axial thrust.
Content described in this specification embodiment is only enumerating to the way of realization of utility model design, and this practicality is new
The protection domain of type is not construed as being only limitted to the concrete form that embodiment is stated, the scope of protection of the utility model is also wrapped
Include those skilled in the art according to the utility model design it is conceivable that equivalent technologies mean.
Claims (7)
1. a kind of centrifugal pump with equilibrium centrifugation pump axial force mechanism, including the pump housing and the impeller sets installed in pump housing inner chamber
Part, the impeller assembly are arranged on and stretched on the pump shaft of pump body, the impeller sets of the impeller assembly and the pump body
Part installation cavity gap coordinates；The impeller assembly includes impeller, front shroud of impeller and back shroud of impeller, and the impeller is arranged on institute
State in the cavity that front shroud of impeller and the back shroud of impeller surround, and the rear portion of the back shroud of impeller forms balance cylinder,
The balance cylinder of described back shroud is connected with suction eye, and the outer face of the back shroud of impeller is provided with central boss, and it is special
Sign is：Its axial direction of the mounting hole interior edge of the pump housing is fixedly mounted with rear choma, it is described after choma with choma centre bore after insertion
Cardiac prominence platform gap coordinates, and the preoral loop of the rear choma and the front shroud of impeller is coaxial, and the centre bore aperture of rear choma is big
In preoral loop external diameter；The back shroud of impeller is provided with several circumferential equally distributed balance pipes, the outer end of the balance pipe with
Impeller assembly ft connection, the inner of balance pipe connects with impeller assembly inner chamber, and the aperture of balance pipe is from outer end inboard end
It is cumulative.
A kind of 2. centrifugal pump with equilibrium centrifugation pump axial force mechanism as claimed in claim 1, it is characterised in that：Choma afterwards
The pore radius of centre bore is more than 2~3mm of radius of preoral loop.
A kind of 3. centrifugal pump with equilibrium centrifugation pump axial force mechanism as claimed in claim 1, it is characterised in that：The balance
Hole is the circular cone through hole of gradation type, wherein one end aperture connected with the inner chamber of impeller assembly is more than one connected with impeller exocoel
Stomidium footpath.
A kind of 4. centrifugal pump with equilibrium centrifugation pump axial force mechanism as claimed in claim 3, it is characterised in that：Balance pipe
The groove structure of shape of threads is provided with the inwall of hole.
A kind of 5. centrifugal pump with equilibrium centrifugation pump axial force mechanism as claimed in claim 4, it is characterised in that：Outside balance pipe
The aperture at end is 2~3mm, and the outer end of wherein balance pipe refers to balance pipe close to one end of back shroud of impeller outer face.
A kind of 6. centrifugal pump with equilibrium centrifugation pump axial force mechanism as claimed in claim 5, it is characterised in that：In balance pipe
The aperture at end is 5~6mm, and wherein balance pipe the inner refers to the one end of balance pipe inside impeller fluid domain.
A kind of 7. centrifugal pump with equilibrium centrifugation pump axial force mechanism as claimed in claim 6, it is characterised in that：In balance pipe
Screw thread groove depth on wall is 1~2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720762717.9U CN207122435U (en) | 2017-06-27 | 2017-06-27 | A kind of centrifugal pump with equilibrium centrifugation pump axial force mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720762717.9U CN207122435U (en) | 2017-06-27 | 2017-06-27 | A kind of centrifugal pump with equilibrium centrifugation pump axial force mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207122435U true CN207122435U (en) | 2018-03-20 |
Family
ID=61615764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720762717.9U Expired - Fee Related CN207122435U (en) | 2017-06-27 | 2017-06-27 | A kind of centrifugal pump with equilibrium centrifugation pump axial force mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207122435U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209897A (en) * | 2018-11-06 | 2019-01-15 | 江苏大学 | Multistage centrifugal pump rotor axial force balance mechanism |
| CN110701099A (en) * | 2019-10-22 | 2020-01-17 | 中国电建集团上海能源装备有限公司 | Marine seawater lifting pump axial force balancing method and balancing structure |
| CN112762006A (en) * | 2021-01-20 | 2021-05-07 | 浙江理工大学 | Centrifugal pump impeller with adjustable balance hole state |
| CN112879339A (en) * | 2021-01-21 | 2021-06-01 | 合肥中科重明科技有限公司 | Engine axial force balance adjustment structure |
-
2017
- 2017-06-27 CN CN201720762717.9U patent/CN207122435U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209897A (en) * | 2018-11-06 | 2019-01-15 | 江苏大学 | Multistage centrifugal pump rotor axial force balance mechanism |
| CN110701099A (en) * | 2019-10-22 | 2020-01-17 | 中国电建集团上海能源装备有限公司 | Marine seawater lifting pump axial force balancing method and balancing structure |
| CN112762006A (en) * | 2021-01-20 | 2021-05-07 | 浙江理工大学 | Centrifugal pump impeller with adjustable balance hole state |
| CN112762006B (en) * | 2021-01-20 | 2022-09-09 | 浙江理工大学 | Centrifugal pump impeller with adjustable balance hole state |
| CN112879339A (en) * | 2021-01-21 | 2021-06-01 | 合肥中科重明科技有限公司 | Engine axial force balance adjustment structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207122435U (en) | A kind of centrifugal pump with equilibrium centrifugation pump axial force mechanism | |
| CN105570186B (en) | A kind of centrifugal pump of single stage type being able to achieve axial force self-balancing | |
| CN207813960U (en) | A kind of vertical multi-stage centrifugal pump | |
| CN205260931U (en) | Bionical low pressure drop axial -flow type check valve | |
| CN106870243A (en) | A kind of multi-state multistage turbine | |
| CN109236677A (en) | A kind of express pump of the preposition taper inducer of band | |
| CN205243867U (en) | Vortex pump | |
| CN107023490A (en) | A kind of half-spiral inlet type double suction self priming pump | |
| CN205478525U (en) | Can realize single -stage centrifugal pump of axial force self -balancing | |
| CN207813944U (en) | A kind of vertical multi-stage centrifugal pump | |
| CN206874490U (en) | Axial subdivision three-level centrifugal pump | |
| CN204900319U (en) | Utilize seal spring to reduce impeller pump of bearing seal wearing and tearing | |
| CN202927240U (en) | Butterfly-valve noise-attenuating device | |
| CN203655646U (en) | Vertical condensate pump provided with balance device | |
| CN201818559U (en) | Automatic exhaust reflux valve | |
| CN103835987A (en) | Low-temperature deep-well pump | |
| CN206221344U (en) | Energy-efficient automobile engine cooling water pump | |
| CN204805099U (en) | Bulb formula helical blade through -flow pump | |
| CN207231724U (en) | A kind of seal test device | |
| CN207795594U (en) | A kind of vertical double suction self priming pump | |
| CN208565083U (en) | A kind of self-loopa cavitation high-speed centrifugal pump | |
| CN105626581A (en) | Stress application centrifugal pump with pressurization hole | |
| CN201461460U (en) | Submersible motor pump | |
| CN206290481U (en) | A kind of centrifugal pump closed type impeller | |
| CN205478553U (en) | Take supercharging hole's afterburning centrifugal pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180320 Termination date: 20210627 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |