CN109773420A - A kind of manufacturing method of centrifugal pump impeller - Google Patents
A kind of manufacturing method of centrifugal pump impeller Download PDFInfo
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- CN109773420A CN109773420A CN201811650566.3A CN201811650566A CN109773420A CN 109773420 A CN109773420 A CN 109773420A CN 201811650566 A CN201811650566 A CN 201811650566A CN 109773420 A CN109773420 A CN 109773420A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention provides a kind of manufacturing methods of centrifugal pump impeller, belong to impeller technical field.A kind of manufacturing method of centrifugal pump impeller, the following steps are included: the design of S1, die mould and manufacture: first designing the parameters of impeller according to the hydraulic model of centrifugal pump and establish threedimensional model, afterwards using numerical control processing and it is hand-made combine by the way of manufacture die mould, and selecting aluminium as die mould mold materials, diameter 300mm or less does mold materials using aluminium bar material；Diameter 300mm or more does mold materials using cast alumin(i)um, matches aluminum water, and workpiece of casting by standard；S2, head product are examined: will cast resulting workpiece or numerical control cutting is obtained workpiece and tested using naked eyes and metal detector；Protection is deformed before S3, heat treatment, resulting workpiece will be cast or numerical control cutting obtains workpiece, be placed on and lift on frame, and lifting lifts frame when workpiece is into and out of furnace, prevents work piece hoisting thermal deformation.The present invention has the advantages that impeller production is not easy to scrap.
Description
Technical field
The invention belongs to impeller technical field, especially a kind of manufacturing method of centrifugal pump impeller.
Background technique
Centrifugal pump is to be rotated using impeller and make water that centrifugal movement occur come work.Water pump is before activation, it is necessary to make to pump
It is full of water in shell and suction hose, then starts motor, pump shaft impeller and water is made to do high speed rotary motion, centrifugation fortune occurs for water
It is dynamic, it is thrown toward impeller outer edge, the runner through volute pump case flows into the pressure pipe road of water pump.
Impeller is the core of centrifugal pump, its revolving speed high output is big, and the blade on impeller plays main function, impeller again
It to be tested before assembly by static balance.Surfaces externally and internally on impeller is required to be smooth, to reduce the friction loss of water flow.
Impeller Machining process is difficult to control, and casting deformation is big after casting, and machining allowance is uneven, in process due to adding
Spare time amount is uneven, causes cutting force of different sizes, and the internal stress generated on workpiece is uneven, and processing dimension deformation is big, is easy
Beyond given tolerance, waste product is generated.
Summary of the invention
The purpose of the present invention is there is the above problem in view of the prior art, a kind of manufacturer of centrifugal pump impeller is proposed
Method solves the problems, such as that impeller production is easy to scrap.
Object of the invention can be realized by the following technical scheme:
A kind of manufacturing method of centrifugal pump impeller, which comprises the following steps:
S1, die mould design and manufacture: the parameters of impeller are first designed according to the hydraulic model of centrifugal pump and establish three-dimensional
Model, it is rear using numerical control processing and it is hand-made combine by the way of manufacture die mould, and select aluminium as die mould mold materials, directly
Diameter 300mm or less does mold materials using aluminium bar material；Diameter 300mm or more does mold materials using cast alumin(i)um, matches aluminium by standard
Water, and workpiece of casting；
S2, head product are examined: will cast resulting workpiece or numerical control cutting obtains workpiece using naked eyes and metal defect detection
Instrument is tested；
Protection is deformed before S3, heat treatment, will cast resulting workpiece or numerical control cutting obtains workpiece, be placed on and lift frame
On, lifting lifts frame when workpiece is into and out of furnace, prevents work piece hoisting thermal deformation；
S4, solutionizing processing: being heated to 1120 DEG C of ± 10 DEG C of heat preservation 5-9H for the workpiece after protection, then come out of the stove rapidly,
Quenching cooling in water, reinspection test block are managed with furnace treatment；
S5, roughing: workpiece is cleared up into rough grinding, visually inspects defect；
S6, stucco polishing: raw material 100-120 mesh fine sand, ambient humidity 50-70% 22-26 DEG C of environment temperature, will be thin
Sand is mixed to workpiece, turning of work piece, removes the tiny protrusion of workpiece surface, removes surface spikes；
S7, ultrasonic wave water washing: the impeller that polishing is completed is put into and is cleaned by ultrasonic into ultrasonic drilling machine, surface is removed
Impurity, and by spray equipment in workpiece surface spraying protective layer.
In the manufacturing method of above-mentioned centrifugal pump impeller, step S2, by the defect of defect detecting test, defect cleaning, PT are carried out
Defect detecting test presses welding procedure specification (WPS) and carries out repair welding after qualified, postwelding carries out rough grinding, re-starts flaw detection inspection to fault location
It looks into, to progress solutionizing processing after great defect repair welding.
In the manufacturing method of above-mentioned centrifugal pump impeller, step S4, workpiece is heated to 1120 DEG C of ± 10 DEG C of heat preservation 7H, then
It comes out of the stove rapidly cooling into water.
In the manufacturing method of above-mentioned centrifugal pump impeller, step S5, centering is carried out to workpiece datum level before roughing, to leaf
Wheel carries out benchmark and determines, radial technological datum is overlapped as center line with design basis.
In the manufacturing method of above-mentioned centrifugal pump impeller, step S7, the material of protective layer is wax, and wax spray is pressure in 0.6-
0.75MPa。
In the manufacturing method of above-mentioned centrifugal pump impeller, step S7, impeller is after wax spray, natural cooling 30-35min.
In the manufacturing method of above-mentioned centrifugal pump impeller, step S7, spray equipment includes that column, crossbeam and part are placed
Platform；Crossbeam is arranged in the top of the column；The first electricity of lower section setting of crossbeam described in part mounting table is set between the column
Dynamic telescopic rod；The lower section of first electric telescopic rod connects the first mounting plate；The overcentre of first mounting plate is installed
Rotating electric machine, rotating electric machine lower section connect rotary shaft；Second mounting plate is set below the rotary shaft；Second mounting plate bottom
The second electric telescopic rod is installed in face one end, and sliding block is arranged in the second electric telescopic rod front end, and sliding block and sliding rail cooperation are slided, the cunning
Rail is mounted on the bottom surface of the second mounting plate；Cross-bridging is set below the sliding block；Top one end rotation of the cross-bridging is solid
It is scheduled on the lower section of sliding block, the other end rotates the lower section for being fixed on the second mounting plate, and support leg is laterally arranged in the lower section of cross-bridging；Institute
The left side setting spray gun of cross-bridging is stated, drying system is arranged in the right side of cross-bridging；The spray gun is bolted on third peace
In loading board, third mounting plate is fixed on the inside of column.
In the manufacturing method of above-mentioned centrifugal pump impeller, the rotating electric machine uses frequency control motor.
Inverted trapezoidal is used in the cross section of the manufacturing method of above-mentioned centrifugal pump impeller, the sliding rail.
In the manufacturing method of above-mentioned centrifugal pump impeller, upper end setting and the mutually matched dovetail groove of sliding rail of the sliding block.
In the outside of the manufacturing method of above-mentioned centrifugal pump impeller, the support leg, non-slip mat is set.
In the manufacturing method of above-mentioned centrifugal pump impeller, several anti-skidding salient points are arranged in the non-slip mat surface.
In the manufacturing method of above-mentioned centrifugal pump impeller, the drying system includes drying box；The drying box passes through installation
Frame is fixed on the inside of column, and the inside of drying box is arranged heater, blowhole is arranged on Left-Hand Panel, is arranged in right panel
Fan.
In the manufacturing method of above-mentioned centrifugal pump impeller, the heater uses resistance-type ceramic heater.
In the processing technology of above-mentioned Insulation Shell of Magnet Pump, the support leg replaces with the fixation being fixedly connected with cross-bridging
End；The fixing end connects movable end by hinged ball；Non-slip mat is arranged in the outside of the movable end.
Compared with prior art, the invention has the following advantages that
1, this manufacturing method can the preferable impeller of band wearability, work-hardening effect of the present invention is small, and size distortion is small,
Impeller Machining dimensional accuracy is good, and surface smoothness is high.And it is high in machining efficiency, it is high-quality, can guarantee impeller dimensional accuracy and
The deformation of morpheme size tolerance is small, meets the requirement of drawing size and technical requirements.
The present invention pushes sliding block to move on the slide rail by the second electric telescopic rod of setting, so that cross-bridging drives supporting leg
It moves toward one another, is supported on the inner wall of part, the first electric telescopic rod drives part to move up and down, and rotating electric machine drives part to turn
Dynamic, spray gun carries out outer surface spraying to the part for rotating and running up and down, and the fan after spraying in drying system will add
The air of hot device heating dries the outer surface of part by the outer surface that blowhole blows to part；With anti-skidding salient point
Non-slip mat increases the anti-skidding effect that cross-bridging supports part inner cylinder；Support leg with freedom degree rotation further increases
The contact area of support leg and part inner cylinder, provides more stable support in second electric telescopic rod motion process；And this
Device overall structure is simple, easy to operate, convenient for regulation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of spray equipment.
Fig. 2 is the structural schematic diagram of sliding rail and sliding block in spray equipment.
Fig. 3 is the schematic enlarged-scale view A of embodiment one in spray equipment.
Fig. 4 is the structural schematic diagram of non-slip mat in spray equipment.
Fig. 5 is the left view schematic diagram of drying box in spray equipment.
Fig. 6 is the right side view of drying box in spray equipment.
Fig. 7 is the schematic enlarged-scale view A of embodiment two in spray equipment.
In figure: 1- column, 2- crossbeam, 3- part mounting table, the first electric telescopic rod of 4-, the first mounting plate of 5-, 6- rotation
Motor, 7- rotary shaft, the second mounting plate of 8-, the second electric telescopic rod of 9-, 10- sliding block, 11- sliding rail, 12- cross-bridging, 13- support
Foot, 1301- fixing end, 1302- movable end, the hinged ball of 1303-, 14- non-slip mat, 15- third mounting plate, 16- spray gun, 17- dry
Dry systems, 1701- mounting rack, 1702- drying box, 1703- heater, 1704- fan, 1705- blowhole.
Specific embodiment
The technical solution of the patent is explained in further detail With reference to embodiment.
The embodiment of this patent is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining this patent, and cannot be understood as a limitation of this patent.
In the description of this patent, it is to be understood that term " center ", "upper", "lower", "front", "rear", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship, be merely for convenience of description this patent and simplify description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limitation to this patent.
In the description of this patent, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection ", " setting " shall be understood in a broad sense, for example, it may be being fixedly linked, being arranged, may be a detachable connection, set
It sets, or is integrally connected, is arranged.For the ordinary skill in the art, above-mentioned art can be understood as the case may be
The concrete meaning of language in this patent.
A kind of manufacturing method of centrifugal pump impeller, comprising the following steps:
S1, die mould design and manufacture: the parameters of impeller are first designed according to the hydraulic model of centrifugal pump and establish three-dimensional
Model, it is rear using numerical control processing and it is hand-made combine by the way of manufacture die mould, and select aluminium as die mould mold materials, directly
Diameter 300mm or less does mold materials using aluminium bar material；Diameter 300mm or more does mold materials using cast alumin(i)um, matches aluminium by standard
Water, and workpiece of casting；
S2, head product are examined: will cast resulting workpiece or numerical control cutting obtains workpiece using naked eyes and metal defect detection
Instrument is tested；
Protection is deformed before S3, heat treatment, will cast resulting workpiece or numerical control cutting obtains workpiece, be placed on and lift frame
On, lifting lifts frame when workpiece is into and out of furnace, prevents work piece hoisting thermal deformation；
S4, solutionizing processing: being heated to 1120 DEG C of ± 10 DEG C of heat preservation 5-9H for the workpiece after protection, then come out of the stove rapidly,
Quenching cooling in water, reinspection test block are managed with furnace treatment；
S5, roughing: workpiece is cleared up into rough grinding, visually inspects defect；
S6, stucco polishing: raw material 100-120 mesh fine sand, ambient humidity 50-70% 22-26 DEG C of environment temperature, will be thin
Sand is mixed to workpiece, turning of work piece, removes the tiny protrusion of workpiece surface, removes surface spikes；
S7, ultrasonic wave water washing: the impeller that polishing is completed is put into and is cleaned by ultrasonic into ultrasonic drilling machine, surface is removed
Impurity, and by spray equipment in workpiece surface spraying protective layer.
Specifically, in step S2, by the defect of defect detecting test, defect cleaning is carried out, PT defect detecting test presses welding after qualified
Technological procedure carries out repair welding, and postwelding carries out rough grinding, re-starts defect detecting test to fault location, to carrying out after great defect repair welding
Solutionizing processing.
Specifically, in step S4, workpiece is heated to 1120 DEG C of ± 10 DEG C of heat preservation 7H, then comes out of the stove rapidly cooling into water.
Specifically, in step S5, centering is carried out to workpiece datum level before roughing, benchmark is carried out to impeller and is determined, it is radial
Technological datum is overlapped as center line with design basis.
Specifically, in step S7, the material of protective layer is wax, and wax spray is pressure in 0.6-0.75MPa.
Specifically, in step S7, impeller is after wax spray, natural cooling 30-35min.
Embodiment one
Please refer to Fig. 1-6, a kind of spray equipment, including column 1, crossbeam 2 and part mounting table 3；The top of the column 1
Crossbeam 2 is set；The first electric telescopic rod 4 is arranged in the lower section that crossbeam 2 described in part mounting table 3 is arranged between the column 1；It is described
The lower section of first electric telescopic rod 4 connects the first mounting plate 5；The overcentre mounting rotary electric machine 6 of first mounting plate 5,
Rotary shaft 7 is connected below rotating electric machine 6；Second mounting plate 8 is set below the rotary shaft 7；Second mounting plate, 8 bottom surface one
Sliding block 10 is arranged in the second electric telescopic rod 9 of end installation, 9 front end of the second electric telescopic rod, and sliding block 10 and the cooperation of sliding rail 11 are slided, institute
Sliding rail 11 is stated to be mounted on the bottom surface of the second mounting plate 8；Cross-bridging 12 is set below the sliding block 10；The cross-bridging 12 it is upper
Fang Yiduan rotates the lower section for being fixed on sliding block 10, and the other end rotates the lower section for being fixed on the second mounting plate 8, the lower section of cross-bridging 12
Laterally setting support leg 13；Spray gun 16 is arranged in the left side of the cross-bridging 12, and drying system 17 is arranged in the right side of cross-bridging 12；Institute
It states spray gun 16 to be bolted on third mounting plate 15, third mounting plate 15 is fixed on the inside of column 1；Cylindrical part
It is placed on the part mounting table 3 immediately below cross-bridging 12 vertically, the elongation of the second electric telescopic rod 9, sliding block 10 is on sliding rail 11
Movement, so that cross-bridging 12 collapses, the olo of support leg 13 is less than the internal diameter of part；The elongation of first electric telescopic rod 4, so that
Support leg 13 protrudes into the inside of part；Second electric telescopic rod 9 is shunk, and sliding block 10 moves on sliding rail 11, so that cross-bridging 12
It opens, support leg 13 is supported on the inner wall of part；First electric telescopic rod 4 is shunk, so that part face spray gun 16, electric rotating
Machine 6 works, and rotary shaft 7 drives the rotation of the second mounting plate 8, and part is rotated with cross-bridging 12, and spray gun is uniformly to part appearance
Face carries out spraying operation；When needing to adjust relative position of the part relative to spray gun 16, then equally pass through the first electric telescopic rod 4
Up and down motion adjust；After the completion of spraying operation, drying system 17 ensures whole drying effect.
The rotating electric machine 6 uses frequency control motor；The cross section of the sliding rail 11 uses inverted trapezoidal；The sliding block 10
Upper end setting and the mutually matched dovetail groove of sliding rail 11, sliding block 10 and sliding rail 11 cooperate, guarantee have for cross-bridging 12
There are enough pulling force, ensures that the second electric telescopic rod 9 runs smoothly；Non-slip mat 14 is arranged in the outside of the support leg 13；It is described
Several anti-skidding salient points are arranged in 14 surface of non-slip mat；Non-slip mat 14 with anti-skidding salient point increases cross-bridging 12 and support leg 13 is right
The anti-skidding effect of part inner cylinder support.
The drying system 17 includes drying box 1702；The drying box 1702 is fixed on column 1 by mounting rack 1701
Inside, the inside of drying box 1702 is arranged heater 1703, blowhole 1705 is arranged on Left-Hand Panel, is arranged in right panel
Fan 1704；After the completion of spraying operation, the heater 1703 in drying system 17 begins to warm up the gas in drying box 1702,
Fan 1704 works, and by the hot wind after heating from drying box 1702, blows to part by blowhole 1705, rotating electric machine 6 is even
Speed rotation, ensures whole drying effect；The heater 1703 uses resistance-type ceramic heater；Resistance-type ceramic heater
Heating efficiency is high, uses the safe flames of anger.
Embodiment two
Please refer to Fig. 1 and Fig. 7, a kind of spray equipment, including fixing end 1301, movable end 1302 and hinged ball 1303；?
Support leg 13 is replaced with to the fixing end 1301 being fixedly connected with cross-bridging 12 on the basis of embodiment one；The fixing end 1301
Movable end 1302 is connected by hinged ball 1303；Non-slip mat 14 is arranged in the outside of the movable end 1302；It is rotated with freedom degree
Support leg 13 by hinged ball 1303 movable end 1302 and fixing end 1301 are relatively rotated, further increase the second electricity
The contact area of support leg 13 and part inner cylinder, provides more stable support in dynamic 9 motion process of telescopic rod.
The working principle of the invention is: cylindrical part is placed on vertically on the part mounting table 3 immediately below cross-bridging 12,
The elongation of second electric telescopic rod 9, sliding block 10 move on sliding rail 11, so that cross-bridging 12 collapses, the olo of support leg 13 is small
In the internal diameter of part；First electric telescopic rod 4 elongation, so that support leg 13 protrudes into the inside of part；Second electric telescopic rod 9 is received
Contracting, sliding block 10 move on sliding rail 11, so that cross-bridging 12 opens, support leg 13 is supported on the inner wall of part；First is electronic
Telescopic rod 4 is shunk, so that part face spray gun 16, rotating electric machine 6 works, and rotary shaft 7 drives the rotation of the second mounting plate 8, part
As cross-bridging 12 rotates, spray gun uniformly carries out spraying operation to part outer surface；Need to adjust part relative to spray gun 16
Relative position when, then equally adjusted by the up and down motion of the first electric telescopic rod 4；After the completion of spraying operation, drying
Heater 1703 in system 17 begins to warm up the gas in drying box 1702, and fan 1704 works, by the hot wind after heating from
In drying box 1702, part is blowed to by blowhole 1705,6 uniform rotation of rotating electric machine ensures whole drying effect；Have
The non-slip mat 14 of anti-skidding salient point increases the anti-skidding effect that cross-bridging 12 and support leg 13 support part inner cylinder；With freedom degree
The support leg 13 of rotation relatively rotates movable end 1302 and fixing end 1301 by hinged ball 1303, further increases the
The contact area of support leg 13 and part inner cylinder, provides more stable support in two electric telescopic rods, 9 motion process.
Better embodiment of the invention is explained in detail above, but the present invention is not limited to above-mentioned embodiment party
Formula within the knowledge of one of ordinary skill in the art can also be without departing from the purpose of the present invention
Various changes can be made.
Claims (9)
1. a kind of manufacturing method of centrifugal pump impeller, which comprises the following steps:
S1, die mould design and manufacture: first designing the parameters of impeller according to the hydraulic model of centrifugal pump and establish threedimensional model,
Afterwards using numerical control processing and it is hand-made combine by the way of manufacture die mould, and select aluminium as die mould mold materials, diameter
300mm or less does mold materials using aluminium bar material；Diameter 300mm or more does mold materials using cast alumin(i)um, matches aluminum water by standard,
And workpiece of casting；
S2, head product are examined: will cast resulting workpiece or numerical control cutting obtain workpiece using naked eyes and metal detector into
Performing check；
Protection is deformed before S3, heat treatment, will cast resulting workpiece or numerical control cutting obtains workpiece, be placed on and lift on frame, work
Lifting lifts frame when part is into and out of furnace, prevents work piece hoisting thermal deformation；
S4, solutionizing processing: the workpiece after protection is heated to 1120 DEG C of ± 10 DEG C of heat preservation 5-9H, is then come out of the stove rapidly, in water
Middle quenching cooling, reinspection test block are managed with furnace treatment；
S5, roughing: workpiece is cleared up into rough grinding, visually inspects defect；
S6, stucco polishing: raw material 100-120 mesh fine sand, ambient humidity 50-70%, fine sand are mixed by 22-26 DEG C of environment temperature
To workpiece, turning of work piece removes the tiny protrusion of workpiece surface, removes surface spikes；
S7, ultrasonic wave water washing: the impeller that polishing is completed is put into and is cleaned by ultrasonic into ultrasonic drilling machine, the miscellaneous of surface is removed
Matter, and by spray equipment in workpiece surface spraying protective layer.
2. the manufacturing method of centrifugal pump impeller according to claim 1, which is characterized in that in step S2, by defect detecting test
Defect, carry out defect cleaning, PT defect detecting test by welding procedure specification (WPS) carries out repair welding after qualified, and postwelding carries out rough grinding, right
Fault location re-starts defect detecting test, to progress solutionizing processing after great defect repair welding.
3. the manufacturing method of centrifugal pump impeller according to claim 1, which is characterized in that in step S4, workpiece is heated to
Then 1120 DEG C of ± 10 DEG C of heat preservation 7H come out of the stove rapidly cooling into water.
4. the manufacturing method of centrifugal pump impeller according to claim 1, which is characterized in that right before roughing in step S5
Workpiece datum level carries out centering, carries out benchmark to impeller and determines, radial technological datum is overlapped as center line with design basis.
5. the manufacturing method of centrifugal pump impeller according to claim 1, which is characterized in that in step S7, the material of protective layer
Material is wax, and wax spray is pressure in 0.6-0.75MPa.
6. the manufacturing method of centrifugal pump impeller according to claim 1, which is characterized in that in step S7, impeller is in wax spray
Later, natural cooling 30-35min.
7. the manufacturing method of centrifugal pump impeller according to claim 1, which is characterized in that in step S7, spray equipment packet
Include column, crossbeam and part mounting table；Crossbeam is arranged in the top of the column；It is arranged described in part mounting table between the column
The first electric telescopic rod is arranged in the lower section of crossbeam；The lower section of first electric telescopic rod connects the first mounting plate；Described first
The overcentre mounting rotary electric machine of mounting plate, rotating electric machine lower section connect rotary shaft；The second peace of setting below the rotary shaft
Loading board；The second electric telescopic rod is installed in second mounting plate bottom surface one end, and sliding block, sliding block is arranged in the second electric telescopic rod front end
Cooperate with sliding rail and slide, the sliding rail is mounted on the bottom surface of the second mounting plate；Cross-bridging is set below the sliding block；The friendship
Top one end rotation of fork support is fixed on the lower section of sliding block, and the other end rotates the lower section for being fixed on the second mounting plate, cross-bridging
Support leg is laterally arranged in lower section；Spray gun is arranged in the left side of the cross-bridging, and drying system is arranged in the right side of cross-bridging；The spray gun
It is bolted on third mounting plate, third mounting plate is fixed on the inside of column.
8. the manufacturing method of centrifugal pump impeller according to claim 7, which is characterized in that rotating electric machine uses frequency control
Motor.
9. the manufacturing method of centrifugal pump impeller according to claim 8, which is characterized in that the cross section of sliding rail uses inverted trapezoidal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811650566.3A CN109773420A (en) | 2018-12-31 | 2018-12-31 | A kind of manufacturing method of centrifugal pump impeller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811650566.3A CN109773420A (en) | 2018-12-31 | 2018-12-31 | A kind of manufacturing method of centrifugal pump impeller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113399627A (en) * | 2021-04-29 | 2021-09-17 | 徐州鹏盛铸造有限公司 | Casting process for machine tool component |
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| CN205762001U (en) * | 2016-05-30 | 2016-12-07 | 天津市龙云精工机械有限公司 | A kind of annular metal goods spray-painting plant |
| CN106393135A (en) * | 2016-11-25 | 2017-02-15 | 南陵县襄荷产业协会 | Concealed mechanical arm for vehicle machining |
| CN107583802A (en) * | 2017-10-13 | 2018-01-16 | 天津市欣跃涂料有限公司 | A kind of high-pressure spraying machine |
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| CN113399627A (en) * | 2021-04-29 | 2021-09-17 | 徐州鹏盛铸造有限公司 | Casting process for machine tool component |
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Application publication date: 20190521 |