CN108223396A - A kind of high-precision water pump bath scaled model experimental device - Google Patents
A kind of high-precision water pump bath scaled model experimental device Download PDFInfo
- Publication number
- CN108223396A CN108223396A CN201711305935.0A CN201711305935A CN108223396A CN 108223396 A CN108223396 A CN 108223396A CN 201711305935 A CN201711305935 A CN 201711305935A CN 108223396 A CN108223396 A CN 108223396A
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- guide vane
- tail water
- pump shaft
- impeller
- section
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 230000008676 import Effects 0.000 claims description 15
- 238000010079 rubber tapping Methods 0.000 claims description 9
- 238000005242 forging Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 abstract description 11
- 238000002474 experimental method Methods 0.000 abstract description 5
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
-
- 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
- F04D29/06—Lubrication
- F04D29/061—Lubrication 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/528—Casings; Connections of working fluid for axial pumps 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/548—Specially 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of high-precision water pump bath scaled model experimental device, including inlet segment, pump section, tail water section and the elbow section sequentially fitted together；It pumps section and includes impeller mechanism and guide vane mechanism, impeller is mounted on one end of pump shaft, and passes through pump shaft and be rotatably supported in impeller outer tube, and the other end of pump shaft stretches out after elbow section；Guide vane core pipe is sheathed on pump shaft periphery and is not in contact therewith, and guide vane is integrally attached to guide vane core pipe periphery, and guide vane periphery is fixedly connected with guide vane outer cone inside pipe wall；Tail water cone is semioval shape housing, the pump shaft periphery being set in Taper Pipe outside tail water and therewith there are gap, and the open end that tail water is bored is fixedly connected with guide vane core pipe；At tail water section axis pillar is arranged to pump shaft periphery along export direction.The present invention is compact-sized, and experimental precision is high, effectively prevents leaf distortion that may be present in the processing of experimental provision important component, eliminates the adverse effect that pump shaft runs at high speed to fluidised form, can be applied to the experiment of high-precision waterpower performance model.
Description
Technical field
The present invention relates to a kind of fluid mechanical device, specifically about a kind of water pump mould compact-sized, experimental precision is high
Type experimental provision.
Background technology
Due to the pumping plant bulky in practical application, processing charges is high, is difficult often to carry out prototype pump installation
Experiment, carry out the method for experiment after generally taking making model pump installation scaled to prototype pump installation, according to obtaining
Model pump installation experimental result, by given formula scales into the related data of prototype pump installation.
Essential means in being designed as fluid machinery, water pump bath scaled model experimental device are widely used.But
Due to experimental provision, in design, processing and measurement etc., there is also some problems, cause experimental provision experimental precision not high, with
There are larger deviations for the observed result of prototype pump installation.
The guide vane of existing water pump bath scaled model experimental device is mostly using the outer Taper Pipe of core pipe, blade body and guide vane is individually processed, then
Blade body among Taper Pipe outside core pipe and guide vane to be welded respectively, the processing method not only heavy workload, processing is cumbersome, and
And it is difficult to ensure that the accuracy and slickness of flow passage area；Since high-speed drive shaft passes through fluid mass, inevitably convection current
Body generates disturbance, can change fluidised form to a certain extent；For the device with exit bend, traditional pressure tap takes elbow to export 2
The position of times diameter can not ignore elbow hydraulic loss influence, affect the measurement accuracy of pump section flow parameter.
For this purpose, existing water pump bath scaled model experimental device be badly in need of just design, processing and measurement etc. there are the problem of carry out into
The improvement of one step, so as to meet the requirement of the technology of high accuracy experiment.
Invention content
In view of the above-mentioned problems, the object of the present invention is to provide a kind of high-precision water pump bath scaled model experimental device, not only effectively
Leaf distortion that may be present in the processing of experimental provision important component is avoided, and eliminates pump shaft and runs at high speed to fluidised form
Adverse effect.
To achieve the above object, the present invention takes following technical scheme：A kind of high-precision water pump bath scaled model experimental device,
It is characterized in that, which includes inlet segment, pump section, tail water section and the elbow section that sequence fits together；The pump section includes leaf
Mechanism and guide vane mechanism are taken turns, the impeller mechanism includes impeller outer tube and impeller, import and the water inlet of the impeller outer tube
The outlet of section is detachably connected, and the impeller is mounted on one end of pump shaft, and passes through the pump shaft and be rotatably supported in the leaf
It takes turns in outer tube, the other end of the pump shaft stretches out to connect with driving mechanism after the tube wall of the elbow section；The guide vane
Mechanism includes the outer Taper Pipe of guide vane, guide vane core pipe and guide vane, and the import of the outer Taper Pipe of the guide vane and the outlet of the impeller outer tube can
It releasably connects, the guide vane core pipe is sheathed on the pump shaft periphery and is not in contact therewith；The guide vane is integrally attached to institute
Guide vane core pipe periphery is stated, and the guide vane is close to the outlet of the impeller, the guide vane periphery and the guide vane outer cone inside pipe wall
It is fixedly connected；The tail water section includes the outer Taper Pipe of tail water, tail water straight tube and tail water cone, the import of the outer Taper Pipe of the tail water with it is described
The outlet of the outer Taper Pipe of guide vane is detachably connected, the both ends of the tail water straight tube respectively with the outlet of Taper Pipe outside the tail water and institute
The import for stating elbow section is detachably connected；The tail water cone is semioval shape housing, is set in the Taper Pipe outside the tail water
The interior pump shaft periphery and therewith there are gap, the open end of the tail water cone is fixedly connected with the guide vane core pipe；Institute
It states and is arranged axis pillar to the pump shaft periphery along export direction at tail water section, one end and the tail water cone of the axis pillar are fixed
Connection, the other end of the axis pillar extend to the elbow section, and there are gaps with the pump shaft for the axis pillar inner wall.
In a preferred embodiment, on the tail water straight tube for exporting 2 times of impeller diameters away from the guide vane
Setting outlet pressure measuring mechanism, the outlet pressure measuring mechanism include four pressure ports circumferentially symmetrically opened up along the tail water straight tube,
One end of a pressure tapping connector is connected on each pressure port, wherein the other end of three pressure tapping connectors connects one three
Logical, the other end of a pressure tapping connector connects a four-way, between the adjacent threeway and the threeway and four-way
Between be connected by annular hose, finally pick out connection pressure sensor from the outlet on the four-way.
In a preferred embodiment, the guide vane core pipe and guide vane are added using 5-axis machining center solid forging
Then Taper Pipe outside the solid forging of the guide vane core pipe processed and guide vane and the guide vane is carried out positioning welding by work.
In a preferred embodiment, the inlet segment is arranged to the reducer pipe that import is big, outlet is small.
In a preferred embodiment, the other end of the axis pillar passes through the through-hole reserved in the elbow section and stretches
Enter and be set in the mechanical sealing mechanism of the pump shaft other end, and there are gaps between the axis pillar and the through-hole.
In a preferred embodiment, a diameter of 3~6mm of the pressure port or equal to the tail water straight tube diameter
0.08, take the small value in the two, the depth of the pressure port is not less than the diameter of 2.5 times of pressure ports.
The present invention has the following advantages due to taking above technical scheme：1st, since high-speed rotating pump shaft passes through out
Water flow passage, high speed rotation can have an impact fluidised form, the present invention add axis pillar to pump shaft periphery and make axis pillar and pump shaft there are
Certain gap can avoid generating disturbance to fluid.2nd, guide vane core pipe of the invention and guide vane are using in five-axle linkage processing
Heart solid forging is processed, and is capable of the slickness of the leaf spatial accuracy of strong guarantee and runner, the guide vane that then will be processed
The solid forging of core pipe and guide vane carries out positioning welding with the outer Taper Pipe of guide vane, avoids and carries out guide vane weldering using traditional processing mode
Leaf error caused by connecing.3rd, inlet segment is arranged to the reducer pipe that import is big, outlet is small by the present invention, can come impeller upstream
Stream flowing is more smooth.4th, the axis pillar other end of the invention passes through the through-hole reserved in elbow section and stretches into that be arranged on pump shaft another
There are gaps, such segment fluid flow in the mechanical sealing mechanism of one end, and between axis pillar and the through-hole can pass through axis pillar
With the gap of through-hole, and flow into mechanical sealing mechanism and be lubricated cooling.5th, for the device with exit bend, traditional pressure measurement
Point takes the position of the 2 times of diameters in elbow outlet, and elbow hydraulic loss can influence to pump the measurement accuracy of section flow parameter, and of the invention
Outlet pressure measuring mechanism is located at the position away from the 2 times of impeller diameters in guide vane outlet can evade elbow hydraulic loss.6th, present invention knot
Structure is compact, and experimental precision is high, effectively prevents leaf distortion that may be present in the processing of experimental provision important component, eliminates pump
The adverse effect that axis runs at high speed to fluidised form improves the reliability of fluid flow measurement in performance test, can be applied to high-precision
Spend hydraulic performance model experiment.
Description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the structure diagram of guide vane mechanism of the present invention；
Fig. 3 is the structure diagram of axis pillar of the present invention；
Fig. 4 is the structure diagram of present invention outlet pressure measuring mechanism.
Specific embodiment
Understand to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the present embodiment
Figure carries out the technical solution in the embodiment of the present invention clear, detailed description, it is clear that described embodiment is the present invention
Part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
All other embodiments obtained under the premise of creative labour, shall fall within the protection scope of the present invention.
As shown in Figure 1 and Figure 2, water pump bath scaled model experimental device provided by the invention includes the inlet segment that sequence fits together
1st, section 2, tail water section 3 and elbow section 4 are pumped.Wherein, pump section 2 includes impeller mechanism 21 and guide vane mechanism 22, and impeller mechanism includes leaf
Outer tube 23 and impeller 24 are taken turns, the import and the outlet of inlet segment 1 of impeller outer tube 23 are detachably connected, and impeller 24 is mounted on pump shaft
5 one end, and pass through pump shaft 5 and be rotatably supported in impeller outer tube 23, the other end of pump shaft 5 is stretched after the tube wall of elbow section 4
Go out to connect with driving mechanism.Guide vane mechanism 22 includes the outer Taper Pipe 25 of guide vane, guide vane core pipe 26 and guide vane 27, the outer Taper Pipe 25 of guide vane
Import and the outlet of impeller outer tube 23 it is detachably connected, guide vane core pipe 26 is set on pump shaft 5 and is not in contact therewith；It leads
Leaf 27 is integrally attached to 25 periphery of guide vane core pipe, and guide vane 27 is close to the outlet of impeller 24,27 periphery of guide vane and the outer Taper Pipe of guide vane
26 inner walls are fixedly connected.Tail water section 3 includes the outer Taper Pipe 31 of tail water, tail water straight tube 32 and tail water cone 33, the outer Taper Pipe 31 of tail water into
It is mouthful detachably connected with the outlet of guide vane Taper Pipe 25 outside, the both ends of tail water straight tube 32 respectively with the outlet of Taper Pipe outside tail water 31 and
The import of elbow section 4 is detachably connected；Tail water bores 33 as semioval shape housing, the pump being set in Taper Pipe outside tail water 31
5 periphery of axis and therewith there are gap, the open end of tail water cone 33 is fixedly connected with guide vane core pipe 26.
As shown in Figure 1, Figure 3, at tail water section 3 along export direction axis pillar 6 is arranged to 5 periphery of pump shaft, the one of axis pillar 6
End is fixed together by several bolts and tail water cone 33, and the other end extends to elbow section 4, and 6 inner wall of axis pillar is stayed with pump shaft 5
There is certain gap, which can determine according to 6 material property of axis pillar and specific stress load.
In a preferred embodiment, as shown in figure 4, in the tail water straight tube 32 that 2 times of impeller diameters are exported away from guide vane 27
Upper setting outlet pressure measuring mechanism 7, outlet pressure measuring mechanism 7 include four pressure ports circumferentially symmetrically opened up along tail water straight tube 32, often
One end of a pressure tapping connector 71 is connected on one pressure port, wherein the other end one threeway 72 of connection of three pressure tapping connectors 71, one
The other end of a pressure tapping connector 71 connects a four-way 73, passes through between adjacent threeway 72 and between threeway 72 and four-way 73
Annular hose 74 is connected, and finally picks out connection pressure sensor (not shown) from the outlet on four-way 73.
In a preferred embodiment, in order to improve guide vane machining accuracy, guide vane core pipe 26 and guide vane 27 use five axis
Linkage motion cutting center solid forging processing, to ensure the accuracy of Guide vane profile and slickness, the guide vane core that then will process
The solid forging of pipe 26 and guide vane 27 carries out positioning welding with the outer Taper Pipe 25 of guide vane, avoids carrying out guide vane using traditional processing mode
Leaf error caused by welding.
In a preferred embodiment, as shown in Figure 1, in order to make 24 upstream incoming flowing of impeller more smooth, water inlet
Section 1 is arranged to the reducer pipe that import is big, outlet is small, as long as the length of reducer pipe can cover what pump shaft 5 was in direct contact with fluid
Region.
In a preferred embodiment, as shown in figure 3, the other end of axis pillar 6 passes through the through-hole reserved in elbow section 4
And it stretches into the mechanical sealing mechanism 8 for being arranged on 5 other end of pump shaft, and there are gap, such portions between axis pillar 6 and the through-hole
Shunting body can pass through the gap of axis pillar 6 and through-hole, and flow into mechanical sealing mechanism 8 and be lubricated cooling.
In a preferred embodiment, a diameter of 3~6mm of pressure port or equal to 32 diameter of tail water straight tube 0.08,
The small value in the two is taken, the depth of pressure port is not less than the diameter of 2.5 times of pressure ports.
The various embodiments described above are merely to illustrate the present invention, and the connection of each component and structure can be all varied from,
It is all to the improvement of the connection of individual part and structure progress and to be equal according to the principle of the invention on the basis of technical solution of the present invention
Transformation, should not exclude except protection scope of the present invention.
Claims (6)
1. a kind of high-precision water pump bath scaled model experimental device, which is characterized in that the device includes the water inlet that sequence fits together
Section, pump section, tail water section and elbow section；
The pump section includes impeller mechanism and guide vane mechanism, and the impeller mechanism includes impeller outer tube and impeller, the impeller outer
The import of pipe and the outlet of the inlet segment are detachably connected, and the impeller is mounted on one end of pump shaft, and passes through the pump
Axis is rotatably supported in the impeller outer tube, the other end of the pump shaft stretched out after the tube wall of the elbow section with driving
Mechanism connects；
The guide vane mechanism includes the outer Taper Pipe of guide vane, guide vane core pipe and guide vane, the import of the outer Taper Pipe of the guide vane and the impeller
The outlet of outer tube is detachably connected, and the guide vane core pipe is sheathed on the pump shaft periphery and is not in contact therewith；The guide vane
The guide vane core pipe periphery is integrally attached to, and the guide vane, close to the outlet of the impeller, the guide vane periphery is led with described
Leaf outer cone inside pipe wall is fixedly connected；
The tail water section includes the outer Taper Pipe of tail water, tail water straight tube and tail water cone, the import of the outer Taper Pipe of the tail water and the guide vane
The outlet of outer Taper Pipe is detachably connected, the both ends of the tail water straight tube respectively with the outlet of Taper Pipe outside the tail water and described curved
The import of head section is detachably connected；The tail water cone is semioval shape housing, is set in Taper Pipe outside the tail water
The pump shaft periphery and therewith there are gap, the open end of the tail water cone is fixedly connected with the guide vane core pipe；
At the tail water section axis pillar, one end and the tail of the axis pillar are arranged to the pump shaft periphery along export direction
Water cone is fixedly connected, and the other end of the axis pillar extends to the elbow section, the axis pillar inner wall and the pump shaft there are
Gap.
2. a kind of high-precision water pump bath scaled model experimental device as described in claim 1, which is characterized in that go out away from the guide vane
Setting outlet pressure measuring mechanism on the tail water straight tube of 2 times of impeller diameters of mouth, the outlet pressure measuring mechanism are included along described
Circumferential four pressure ports symmetrically opening up of tail water straight tube connect one end of a pressure tapping connector on each pressure port, wherein three
The other end of a pressure tapping connector connects a threeway, and the other end of a pressure tapping connector connects a four-way, adjacent
The threeway between and the threeway and four-way between be connected by annular hose, finally from the outlet on the four-way
Pick out connection pressure sensor.
3. a kind of high-precision water pump bath scaled model experimental device as described in claim 1, which is characterized in that the guide vane core pipe and
Guide vane is processed using 5-axis machining center solid forging, then forges the guide vane core pipe processed and the whole of guide vane
Part carries out positioning welding with the outer Taper Pipe of the guide vane.
A kind of 4. high-precision water pump bath scaled model experimental device as described in claim 1, which is characterized in that the inlet segment setting
Into the reducer pipe that import is big, outlet is small.
5. a kind of high-precision water pump bath scaled model experimental device as described in claim 1, which is characterized in that the axis pillar it is another
One end passes through the through-hole reserved in the elbow section and stretches into the mechanical sealing mechanism for being set to the pump shaft other end, and institute
State between axis pillar and the through-hole that there are gaps.
6. a kind of high-precision water pump bath scaled model experimental device as claimed in claim 2, which is characterized in that the pressure port it is straight
Diameter for 3~6mm or equal to the tail water straight tube diameter 0.08, take the small value in the two, the depth of the pressure port is not less than
The diameter of 2.5 times of pressure ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711305935.0A CN108223396B (en) | 2017-12-11 | High-precision water pump model experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711305935.0A CN108223396B (en) | 2017-12-11 | High-precision water pump model experimental device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108223396A true CN108223396A (en) | 2018-06-29 |
| CN108223396B CN108223396B (en) | 2024-04-26 |
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