CN110685917A - Vertical end suction type volute centrifugal pump - Google Patents
Vertical end suction type volute centrifugal pump Download PDFInfo
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- CN110685917A CN110685917A CN201911085641.0A CN201911085641A CN110685917A CN 110685917 A CN110685917 A CN 110685917A CN 201911085641 A CN201911085641 A CN 201911085641A CN 110685917 A CN110685917 A CN 110685917A
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- bearing
- pump
- cooling water
- vertical end
- centrifugal pump
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Classifications
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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
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
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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
- F04D29/046—Bearings
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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
- F04D29/046—Bearings
- F04D29/047—Bearings hydrostatic; hydrodynamic
-
- 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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/051—Axial thrust balancing
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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
- F04D29/06—Lubrication
- F04D29/061—Lubrication especially adapted for liquid pumps
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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
- F04D29/08—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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a vertical end suction type volute centrifugal pump which comprises an impeller, a pump body, a pump cover and a rotating shaft, wherein the pump body is used for accommodating the impeller; the sealing component is fixed on the rotating shaft through a water guide bearing; the bearing comprises a first bearing component and a second bearing component, wherein a lubricating oil cavity is arranged in the first bearing component, a cooling cavity is further formed in the first bearing component, and the cooling cavity is located on the outer side of the lubricating oil cavity. The vertical end suction type volute centrifugal pump provided by the invention is respectively suitable for the conditions of not bearing axial force and bearing axial force by using the first bearing component and the second bearing component; the first bearing part is additionally provided with the cooling cavity, so that the service temperature of the pump body can be increased to 165 ℃, and the application range is expanded.
Description
Technical Field
The invention relates to the field of centrifugal pumps, in particular to a vertical end suction type volute centrifugal pump.
Background
In the prior art, a vertical volute pump generally has two structures, one of which is a vertical double-suction open-in structure form and comprises a pump body, a pump cover, an impeller, a shaft, a sealing body, a shaft sleeve, a bearing body part, a packing part, a mechanical sealing part and the like, wherein the pump body and the pump cover are vertically symmetrical by taking the center line of the impeller as a reference, a water outlet volute is of a double layer, and a pump inlet and a pump outlet are arranged on the same side of an open surface in the pump; the impeller is single-stage double suction type, and import department is the low-pressure zone, and upper and lower shaft seal generally is for supplying seal, sparge water certainly, and sealed axle sleeve is through two O type circle to water-tight seal, and the bearing is the fat lubrication, and drive end antifriction bearing passes through rand and axle sleeve location, and non-drive end guide bearing passes through the shaft shoulder, reaches the round nut and adds butterfly gasket location, and this kind of centrifugal pump mainly used water factory, petroleum, chemical industry, etc. field, main application range: the flow rate is about 75 to 2880m3H, the lift is about 10 to 220m, and the temperature of a conveying medium is less than or equal to 85 ℃. And secondly, the motor and the pump share one pump shaft in a vertical single-suction small-sized pipeline type structure with horizontal water inlet and outlet. The main application range is as follows: the flow rate is about 1.5 to 1200m3H, the lift is about 8 to 150m, and the temperature of a conveying medium is less than or equal to 85 ℃. In the use process of the prior art, the service life of the bearing part is short due to the temperature problem, and the working efficiency is influenced.
The present invention is an improvement to solve the above problems.
Disclosure of Invention
The invention aims to provide a vertical end suction type volute centrifugal pump with high flow rate and low lift.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a vertical end suction volute centrifugal pump comprises an impeller.
The pump cover is fixedly provided with a bearing support, a first bearing part or a second bearing part is fixedly arranged on the bearing support, and the bearing part is sleeved on the rotating shaft; the sealing component is fixed on the rotating shaft through a water guide bearing; the bearing comprises a first bearing component and a second bearing component, wherein a lubricating oil cavity is arranged in the first bearing component, a cooling cavity is further formed in the first bearing component, and the cooling cavity is located on the outer side of the lubricating oil cavity.
Furthermore, a first cooling water inlet and a first cooling water outlet are formed in the side wall of the first bearing component, and the cooling water inlet and the cooling water outlet are communicated with the cooling cavity.
Furthermore, the second bearing part comprises a sector block arranged in the bearing support, a thrust block is clamped on the sector block, a thrust column is arranged on the thrust block, an oil domain cavity is arranged outside the sector block, the thrust block and the thrust column, a coil pipe is fixed in the oil domain cavity, a second cooling water inlet and a second cooling water outlet are formed in the outer side of the second bearing part, and the second cooling water inlet and the second cooling water outlet are communicated with the coil pipe; and a radial bearing is further fixed on the outer side of the thrust column.
Further, the sealing component adopts a mechanical sealing component or a packing sealing component.
Further, the mechanical seal part comprises a mechanical seal gland and a mechanical seal body, the mechanical seal gland is axially fixed with the mechanical seal body, a green-shell paper gasket is arranged on the mechanical seal part, and the green-shell paper gasket is used for preventing water leakage between the seal body and the mechanical seal gland.
Further, the packing seal component comprises a packing seal gland and a soft packing, and the packing seal gland and the soft packing body are axially fixed.
Further, the pump body is of an integral structure, the pump body is provided with an inlet end and an outlet end, the inlet end is located on the lower side of the pump body, and the position of the outlet end and the position of the inlet end are arranged at ninety degrees.
Furthermore, a sealing ring is clamped on the inner side of the inlet end of the pump body.
The invention has the advantages that:
the vertical end suction type volute centrifugal pump provided by the invention is respectively suitable for the conditions of not bearing axial force and bearing axial force by using the first bearing component and the second bearing component; the second bearing part ensures a sealing gap by additionally arranging a radial guide bearing, ensures the product efficiency, reduces the radial force born by a rolling bearing and prolongs the service life of the bearing; the first bearing part is additionally provided with the cooling cavity, so that the service temperature of the pump body can be increased to 165 ℃, and the application range is expanded.
Drawings
FIG. 1 is a cross-sectional view of a vertical end-suction volute centrifugal pump according to the present invention;
FIG. 2 is a longitudinal cross-sectional view of the first bearing component of the centrifugal pump;
FIG. 3 is a transverse cross-sectional view of the first bearing component;
fig. 4 is a sectional view of the second bearing component of the centrifugal pump.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the invention is further described with reference to the figures and the specific embodiments.
As shown in fig. 1 to 4, the vertical end suction type volute centrifugal pump provided by the invention includes an impeller 1, a pump body 2 for accommodating the impeller 1, a pump cover 3 fixed on the pump body 2, and a rotating shaft 4 rotatably arranged in the middle of the pump cover 3, wherein a sealing member is arranged between the pump cover 3 and the rotating shaft 4, a bearing support 5 is fixed on the pump cover 3, a first bearing member or a second bearing member is fixed on the bearing support 5, and the bearing member is sleeved on the rotating shaft 4; the sealing component is fixed on the rotating shaft 4 through a water guide bearing 6; the bearing comprises a first bearing component and a second bearing component, wherein a lubricating oil cavity 7 is arranged in the first bearing component, a cooling cavity 8 is further formed in the first bearing component, and the cooling cavity 8 is located on the outer side of the lubricating oil cavity 7.
The invention is further provided with: the side wall of the first bearing component is provided with a first cooling water inlet 9 and a first cooling water outlet 10, and the cooling water inlet 9 and the cooling water outlet 10 are communicated with the cooling cavity 8. By adopting the technical scheme, the method is based on
The invention is further provided with: the second bearing part comprises a sector 11 arranged in the bearing support 5, a thrust block 12 is clamped on the sector 11, a thrust column 13 is arranged on the thrust block 12, an oil domain cavity 14 is arranged outside the sector 11, the thrust block 12 and the thrust column 13, a coil incense tube 15 is fixed in the oil domain cavity 14, a second cooling water inlet 16 and a second cooling water outlet 17 are arranged outside the second bearing part, and the second cooling water inlet 16 and the second cooling water outlet 17 are communicated with the coil incense tube 15; a radial bearing 18 is also fixed to the outside of the thrust column 13. By adopting the technical scheme, the first bearing component is used for bearing the condition of no axial force, and the second bearing component is used for bearing the condition of the axial force; the first bearing part which does not bear the axial force is supported at the connecting position of the pump cover and is of a grease lubricating structure, a cooling cavity, a cooling water inlet and a cooling water outlet are arranged outside the first bearing part, the cooling cavity is positioned outside the lubricating oil cavity, and the cooling cavity surrounds the lubricating oil cavity of the bearing body; the second bearing part bearing the axial force is supported at the motor base link position and is of a thin oil lubrication structure, the thrust block, the fan-shaped block and the radial bearing which are arranged in the second bearing part are all completely immersed in lubricating oil, the working surface of the thrust column is also immersed in the lubricating oil, and the coil incense tube is arranged in the oil domain cavity to cool the thrust block, the fan-shaped block and the radial bearing.
The vertical end suction type volute centrifugal pump follows the fluid dynamics principle, the pump flow passage area change principle and the pump appearance aesthetic principle, the area of each section is uniformly changed according to the change principle under the condition of the same length, the water flow moves in a laminar flow manner, and the loss of fluid along the way is reduced to the minimum when the fluid passes through a pump body; the impeller selects an optimal hydraulic model according to design parameters and the number of revolutions, and the rotating direction of the blades is clockwise when viewed from the inlet of the impeller. In terms of structure, the structure can be divided into two structures, wherein one pump does not bear axial force, and the other pump bears axial force. The pump does not bear axial forces: the pump body is supported by two side landing pump feet, and the three support rib plates are directly connected with the motor base connecting plane, so that the whole weight of the pump group is effectively supported, and the arrangement of a pump foot foundation and a water inlet pipe is facilitated; the pump cover is downwards embedded into the shell to play a role in adjusting the area of the flow passage, and the outer ring of the shaft seal is provided with a cooling cavity which is externally connected with cooling water so as to improve the working environment of the shaft seal; the Z-shaped structure of the impeller sealing ring ensures that the clearance is in the design range under the action of the guide bearing on the radial contact surface of the impeller, the bearing support is linked with the pump cover and the pump body at the same position, and a maintenance manhole opening is formed in the support; the bearing body part adopts the mode that slip and antifriction bearing combined together, and antifriction bearing bears main radial force, adopts grease lubrication structure, sets up the cooling cavity in the bearing body outer lane, and external cooling water changes antifriction bearing operational environment, and slide bearing is water lubrication pilot bearing formula, and supplementary antifriction bearing bears radial force. The sealing form of the shaft can be divided into a packing seal and a mechanical seal. The pump bears axial force: except the bearing part and the bearing bracket, the structure of other parts is consistent with the structure which does not bear axial force, and the bearing part adopts a tilting pad thrust bearing, is lubricated by thin oil and is internally provided with a coil pipe cooling oil area; the bearing support is linked with the motor base position so as to better bear axial force.
The invention is further provided with: the sealing part adopts a mechanical sealing part or a packing sealing part.
The invention is further provided with: the mechanical seal part comprises a mechanical seal gland and a mechanical seal body, the mechanical seal gland is axially fixed with the mechanical seal body, a green shell paper gasket is arranged on the mechanical seal part and used for preventing water leakage between the seal body and the mechanical seal gland.
The application range of the centrifugal pump is as follows: the flow rate is about 500 to 20000m3H, the maximum lift is 70m, and the temperature of a conveying medium is less than or equal to 165 ℃. Can be used for circulating water pumps of power plants, diversion of yellow water, south-to-north water diversion, municipal water conservancy and rainwater drainage.
The invention is further provided with: the packing seal component comprises a packing seal gland and a soft packing, and the packing seal gland and the soft packing body are axially fixed. By adopting the technical scheme, the soft packing compression amount is adjusted by adjusting the lengths of the packing sealing gland and the sealing body connecting bolt, so that the sealing purpose is achieved; both the mechanical seal component and the packing seal component may be used, but not both.
The invention is further provided with: the pump body 2 is of an integral structure, the pump body 2 is provided with an inlet end and an outlet end, the inlet end is positioned at the lower side of the pump body 2, and the position of the outlet end and the position of the inlet end are arranged at ninety degrees.
The invention is further provided with: and a sealing ring 19 is clamped on the inner side of the inlet end of the pump body 2. By adopting the technical scheme, the impeller enters from the inlet position of the pump body according to water flow and flows out from the outlet position of the pump body, the liquid is pressurized in the pump, the sealing ring plays a vital role, and the efficiency is ensured while the pressure leakage loss is ensured.
The working principle of the invention is as follows:
typically, the temperature of the bearing components comes from two places: the temperature generated by the operation of the high-temperature medium and the rotating shaft; the temperature of the high-temperature medium can be outwards transmitted to the bearing part through the pump body and the rotating shaft, and the temperature of the bearing part per se can exceed the normal working temperature when the bearing part works, the heat passing through the rotating shaft can achieve the cooling effect through external washing water, and the external washing water is required to be provided no matter the packing seal or the mechanical seal, so that the heat transmitted to the direction of the bearing part is basically taken away by the cooling water; the heat generated by the operation of the bearing component is taken away by the cooling water of the bearing cooling cavity, so that the effect of reducing the temperature of the working environment of the bearing is achieved.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (8)
1. The utility model provides a vertical end suction type volute centrifugal pump, includes impeller (1), its characterized in that:
the impeller pump is characterized by further comprising a pump body (2) for accommodating the impeller (1), a pump cover (3) fixed on the pump body (2) and a rotating shaft (4) rotatably arranged in the middle of the pump cover (3), a sealing part is arranged between the pump cover (3) and the rotating shaft (4), a bearing support (5) is fixed on the pump cover (3), a first bearing part or a second bearing part is fixed on the bearing support (5), and the rotating shaft (4) is sleeved with the bearing part; the sealing component is fixed on the rotating shaft (4) through a water guide bearing (6); the bearing is characterized in that a lubricating oil cavity (7) is formed in the first bearing component, a cooling cavity (8) is further formed in the first bearing component, and the cooling cavity (8) is located on the outer side of the lubricating oil cavity (7).
2. The vertical end suction volute centrifugal pump of claim 1, wherein: a first cooling water inlet (9) and a first cooling water outlet (10) are formed in the side wall of the first bearing component, and the cooling water inlet (9) and the cooling water outlet (10) are communicated with the cooling cavity (8).
3. The vertical end suction volute centrifugal pump of claim 1, wherein: the second bearing part comprises a fan-shaped block (11) arranged in a bearing support (5), a thrust block (12) is clamped on the fan-shaped block (11), a thrust column (13) is arranged on the thrust block (12), an oil domain cavity (14) is arranged outside the fan-shaped block (11), the thrust block (12) and the thrust column (13), a coil pipe (15) is fixed in the oil domain cavity (14), a second cooling water inlet (16) and a second cooling water outlet (17) are formed in the outer side of the second bearing part, and the second cooling water inlet (16) and the second cooling water outlet (17) are communicated with the coil pipe (15); and a radial bearing (18) is also fixed on the outer side of the thrust column (13).
4. The vertical end suction volute centrifugal pump of claim 1, wherein: the sealing part adopts a mechanical sealing part or a packing sealing part.
5. The vertical end suction volute centrifugal pump of claim 4, wherein: the mechanical seal part comprises a mechanical seal gland and a mechanical seal body, the mechanical seal gland is axially fixed with the mechanical seal body, a green shell paper gasket is arranged on the mechanical seal part and used for preventing water leakage between the seal body and the mechanical seal gland.
6. The vertical end suction volute centrifugal pump of claim 4, wherein: the packing seal component comprises a packing seal gland and a soft packing, and the packing seal gland and the soft packing body are axially fixed.
7. The vertical end suction volute centrifugal pump of claim 1, wherein: the pump body (2) is of an integral structure, the pump body (2) is provided with an inlet end and an outlet end, the inlet end is located on the lower side of the pump body (2), and the position of the outlet end and the position of the inlet end are arranged at ninety degrees.
8. The vertical end suction volute centrifugal pump of claim 7, wherein: and a sealing ring (19) is clamped on the inner side of the inlet end of the pump body (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911085641.0A CN110685917A (en) | 2019-11-08 | 2019-11-08 | Vertical end suction type volute centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911085641.0A CN110685917A (en) | 2019-11-08 | 2019-11-08 | Vertical end suction type volute centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110685917A true CN110685917A (en) | 2020-01-14 |
Family
ID=69115826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911085641.0A Withdrawn CN110685917A (en) | 2019-11-08 | 2019-11-08 | Vertical end suction type volute centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110685917A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201106574Y (en) * | 2007-08-15 | 2008-08-27 | 沈阳鼓风机(集团)有限公司 | Self-lubricating thrust unit and balance mechanism of vertical pump |
| CN201297272Y (en) * | 2008-11-24 | 2009-08-26 | 天津甘泉集团有限公司 | Thrust bearing device for submergible pump |
| CN201615081U (en) * | 2010-02-11 | 2010-10-27 | 大连深蓝泵业有限公司 | Essential service water pump of nuclear power station of pressurized water reactor |
| CN201925236U (en) * | 2010-12-30 | 2011-08-10 | 上海阿波罗机械股份有限公司 | Essential service water pump for nuclear power station |
| CN103438018A (en) * | 2013-09-16 | 2013-12-11 | 合肥恒大江海泵业股份有限公司 | Automatic self-aligning thrust bearing for water-filling-type submersible electric pump |
| CN205402198U (en) * | 2016-03-23 | 2016-07-27 | 上海水泵制造有限公司 | Automatic spray structure of vertical pump thrust bearing lubricating oil |
| CN106593935A (en) * | 2016-12-21 | 2017-04-26 | 湖南崇德工业科技有限公司 | Vertical thrust sliding bearing with backstop unit |
| CN108757492A (en) * | 2018-06-01 | 2018-11-06 | 昆明理工大学 | A kind of vertical centrifugal pump of configuration air hydrodynamic bearing |
| CN108825507A (en) * | 2018-07-02 | 2018-11-16 | 上海水泵制造有限公司 | A kind of list double suction mixed type middle open centrifugal pump |
-
2019
- 2019-11-08 CN CN201911085641.0A patent/CN110685917A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201106574Y (en) * | 2007-08-15 | 2008-08-27 | 沈阳鼓风机(集团)有限公司 | Self-lubricating thrust unit and balance mechanism of vertical pump |
| CN201297272Y (en) * | 2008-11-24 | 2009-08-26 | 天津甘泉集团有限公司 | Thrust bearing device for submergible pump |
| CN201615081U (en) * | 2010-02-11 | 2010-10-27 | 大连深蓝泵业有限公司 | Essential service water pump of nuclear power station of pressurized water reactor |
| CN201925236U (en) * | 2010-12-30 | 2011-08-10 | 上海阿波罗机械股份有限公司 | Essential service water pump for nuclear power station |
| CN103438018A (en) * | 2013-09-16 | 2013-12-11 | 合肥恒大江海泵业股份有限公司 | Automatic self-aligning thrust bearing for water-filling-type submersible electric pump |
| CN205402198U (en) * | 2016-03-23 | 2016-07-27 | 上海水泵制造有限公司 | Automatic spray structure of vertical pump thrust bearing lubricating oil |
| CN106593935A (en) * | 2016-12-21 | 2017-04-26 | 湖南崇德工业科技有限公司 | Vertical thrust sliding bearing with backstop unit |
| CN108757492A (en) * | 2018-06-01 | 2018-11-06 | 昆明理工大学 | A kind of vertical centrifugal pump of configuration air hydrodynamic bearing |
| CN108825507A (en) * | 2018-07-02 | 2018-11-16 | 上海水泵制造有限公司 | A kind of list double suction mixed type middle open centrifugal pump |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200114 |