CN108716468A - A kind of efficient sealed feed pump - Google Patents
A kind of efficient sealed feed pump Download PDFInfo
- Publication number
- CN108716468A CN108716468A CN201810331534.0A CN201810331534A CN108716468A CN 108716468 A CN108716468 A CN 108716468A CN 201810331534 A CN201810331534 A CN 201810331534A CN 108716468 A CN108716468 A CN 108716468A
- Authority
- CN
- China
- Prior art keywords
- main shaft
- impeller
- bearing block
- pump
- feed pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
-
- 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
-
- 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
- F04D29/044—Arrangements for joining or assembling 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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
-
- 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
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of efficient sealed feed pump, including pump case, seal assembly, bearing block and the main shaft being arranged in bearing block, one end of main shaft is located in pump case to be connect with impeller, and the other end has shaft coupling by key connection；Bearing block is connected with pump case by stud B；Bearing block both ends have bearing cap, bearing cap to be bolted on bearing block.Solve in the prior art that most of centrifugal pump seal performances are poor, the flimsy problem of mechanical seal.
Description
Technical field
The invention belongs to plumbing equipment technical fields, are related to a kind of efficient sealed feed pump.
Background technology
Water is essential resource in daily life and industrial production, is used mainly as solvent in chemical field.It is pure
Water colorless is tasteless, not volatile.
In the various pumps of conveying water, centrifugation pump duty is big, and compact-sized, uniform flow, lift is larger, application range
Extensively.Due to the effect of centrifugal force, liquid is dished out by impeller, and impeller center position forms low-pressure area, thus main shaft and the pump housing it
Between gap at gas leakage drainage can occur and reduce efficiency.
Invention content
The object of the present invention is to provide a kind of efficient sealed feed pump, solve most of centrifugal pump seals in the prior art
Performance is poor, the flimsy problem of mechanical seal.
The technical solution adopted in the present invention is a kind of efficient sealed feed pump, including pump case, seal assembly, bearing block
With the main shaft being arranged in bearing block, one end of main shaft is located in pump case to be connect with impeller, and the other end has shaft coupling by key connection
Device；Bearing block is connected with pump case by stud B；Bearing block both ends have bearing cap, bearing cap to be bolted on bearing block.
The features of the present invention also characterized in that one end of pump case is equipped with water inlet, water outlet, water inlet are provided with above pump case
It is equipped with pump inlet lid, pump inlet lid is connected with pump case by stud C, there is import lid gasket between pump inlet lid and pump case.
Water inlet is vertical with the axis of water outlet, and the axis of water inlet is identical as the axis direction of main shaft, water inlet with go out
It is equipped with screw thread on the inside of the mouth of a river.
Main shaft and impeller are respectively positioned among pump case, and impeller is fixed on main shaft by locknut B, between impeller and pump case
It is provided with shell wear ring, check washer is provided between nut B and main shaft, is driven by impeller key between impeller and main shaft.
Impeller is equipped with balance hole, and there are one balance holes on each blade of impeller, it is ensured that face pressure before and after impeller
Power is consistent, and gas leakage at axle sleeve is caused to avoid imbalance of pressure.
Seal assembly includes the axle sleeve being sleeved on outside main shaft, the seal cage and filler being sleeved on axle sleeve, axle sleeve and main shaft it
Between be equipped with shaft sleeve key；It is sleeved on axle sleeve outside seal cage, both sides gap is filled with filler, and filler is enclosed in filler by gland
Intracavitary is fixed gland by stud A.
Pump chamber is connected by the pipeline of the top of seal cage with filler cavity, therefore water is led at seal cage and is sealed,
Pipeline connection is extraneous and has plug screw A at top, with equilibrium air pressure.
Drip ring is equipped with before bearing cap, drip ring can prevent gap of the liquid between bearing cap and main shaft from entering bearing
, it is equipped with oil sealing in bearing cap, prevents oil leak.Bearing block lower part is provided with tubulose vernier, and bearing block top is provided with oil level indicator.
Oil level display pole of the structure of oil level indicator by superposed porous plug and positioned at porous plug lower part forms.
Shaft coupling is made of half a coupler A and half a coupler B, is separately connected main shaft and motor shaft, and screw A is by half a coupler
A and key A are fixed on main shaft, and half a coupler B and key B are fixed on motor shaft by screw B, half a coupler A and half a coupler B it
Between be sleeved on stud by Stud connection passing power, elastic ring.
The invention has the advantages that this product hydraulic performance is rationally distributed, maintenance is convenient；Efficiency and suction reach international
Average advanced level.This feed pump be suitable for industry and city water, draining, it can also be used to agricultural drainage and irrigation and for conveying clear water or
Other liquid that physicochemical properties are similar to clear water are used.
Description of the drawings
Fig. 1 is a kind of efficient sealed feed pump structural schematic diagram of the present invention；
Fig. 2 is that figure is cutd open in the part at a kind of efficient sealed feed pump impeller balance hole of the present invention；
Fig. 3 is a kind of efficient sealed water supply impeller of pump front view of the present invention；
Fig. 4 is a kind of efficient sealed feed pump shaft coupling schematic diagram of the present invention；
Fig. 5 is a kind of efficient sealed feed pump oil level indicator schematic diagram of the present invention.
In figure, 1. pump cases, 2. pump inlet lids, 3. main shafts, 4. impellers, 5. bearings, 6. bearing blocks, 7. bearing caps, 8. bolts,
9. bearing vover gasket, 10. import lid gaskets, 11. oil sealings, 12. glands, 13. seal cages, 14. fillers, 15. shells are wear-resisting
Ring, 16. tubulose oil ga(u)ges, 17. drip rings, 18. axle sleeves, 19. oil level indicators, 20. stud A, 21. nut A, 22. washers, 23. nuts
B, 24. plug screw A, 25. shaft sleeve key, 26. impeller keys, 27. shaft couplings, 28. drain plug screws, 29. gasket A, 30. plug screw C, 31. pad
Piece B, 32. stud B, 33. nut C, 34. stud C, 35. nut D, 36. pipelines, 37. balance holes, 38. water inlets, 39. are discharged
Mouthful, 40. pump chambers, 41. motor shafts, 42. half a coupler A, 43. half a coupler B, 44. key A, 45. key B, 46. screw A, 47. screws
B, 48. stud D, 49. nuts, 50. baffle rings, 51. baffle rings, 52 elastic rings, 53. holders, 54. porous plugs, 55. oil level display poles.
Specific implementation mode
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
A kind of efficient sealed feed pump, as shown in Figure 1, including pump case 1, seal assembly, bearing block 6 and being arranged in bearing block
Main shaft 3 in 6, one end of main shaft 3 is located in pump case 1 to be connect with impeller 4, and the other end has shaft coupling 27 by key connection；Bearing
Seat 6 is connected with pump case 1 by stud B32；6 both ends of bearing block have bearing cap 7, bearing cap 7 to be fixed on bearing block 6 by bolt 8
On.
Bearing block 6 is connected with pump case 1 by stud B32.
One end of pump case 1 is equipped with water inlet 38, and the top of pump case 1 is provided with water outlet 39, water inlet 38 be equipped with pump into
Lid 2, pump inlet lid 2 are connected with pump case 1 by stud 34C, there is import lid gasket 10 between pump inlet lid 2 and pump case 1, can be with
Prevent leak gas leakage.
Water inlet 38 is vertical with the axis of water outlet 39, and the axis of water inlet 38 is identical as the axis direction of main shaft 3, water inlet
Mouth 38 is equipped with screw thread with 39 inside of water outlet,
There is drain plug screw 28 in 1 bottom end of pump case, can exclude raffinate in time.
As shown in Fig. 2, main shaft 3 and impeller 4 are respectively positioned among pump case 1, impeller 4 is fixed on main shaft 3 by locknut B23
On, it is provided with shell wear ring 15 between impeller 4 and pump case 1, check washer 22, impeller are provided between nut B23 and main shaft 3
It is driven by impeller key 26 between 4 and main shaft 3；
As shown in figure 3, impeller 4 is equipped with balance hole 37, there are one balance holes 37 on each blade of impeller 4, can
Surface pressure is consistent before and after ensureing impeller 4, and gas leakage at axle sleeve 18 is caused to avoid imbalance of pressure.
Seal assembly includes the axle sleeve 18 being sleeved on outside main shaft 3, the seal cage 13 and filler 14 being sleeved on axle sleeve, axle sleeve 18
Shaft sleeve key 25 is equipped between main shaft 3；It being sleeved on axle sleeve 18 outside seal cage 13, both sides gap is filled with filler 14,
Filler 14 is enclosed in by gland 12 in packing cavity, is fixed gland 12 by stud A20.
Pump chamber 40 is connected by the pipeline 36 of the top of seal cage 13 with 14 cavity of filler, therefore water is led at seal cage 13
It is sealed, pipeline 36 is connected to the external world and has plug screw A24 at top, with equilibrium air pressure.
Before bearing cap 7 be equipped with drip ring 17, drip ring can prevent gap of the liquid between bearing cap 7 and main shaft 3 into
Enter bearing block 6.
It is equipped with oil sealing 11 in bearing cap 7, prevents oil leak.6 lower part of bearing block is provided with tubulose vernier 16, and bearing block top is set
It is equipped with oil level indicator 19, as shown in figure 5, oil of the structure of oil level indicator 19 by superposed porous plug 54 and positioned at porous plug lower part
Position display pole 55 forms.
As shown in figure 4, shaft coupling 27 is made of half a coupler A42 and half a coupler B43, it is separately connected main shaft 3 and motor
Half a coupler A42 and key A44 are fixed on main shaft 3 by axis 41, screw A46,
Half a coupler B43 and key B45 are fixed on motor shaft 41 by screw B47, half a coupler A42 and half a coupler B43
Between by stud 48 connect passing power, elastic ring 52 is sleeved on stud 48, for increasing elasticity when rotation, rise protection make
With.
In the present invention, the effect of bearing block 6 is subject to the power suffered by pump shaft, and bearing cap 7 is fixed by 3 bolts；Oil sealing
11 prevent that bearing oil from leaking and extraneous dust enters；Oil level indicator 19 measures the liquid level of bearing block interior oil, while also may be used
To keep inside and outside air pressure balance；Drip ring 17 can prevent water from being penetrated into from the gap of bearing cap and main shaft from this；Bearing block bottom
Portion's connecting bracket 53, to support the pump housing to operate.
Pump case 1 is connected and fixed with bearing block 6 by 8 stud B32；Pump inlet lid passes through 12 stud C34 and 1 phase of pump case
Even, import lid gasket 10 is sealed among it；1 bottom of pump case is equipped with plug screw B28, and raffinate in pump case 1 can be discharged；Impeller
4 are fixed on by nut B23 on main shaft 3, and check washer 22 is provided between nut B23 and main shaft 3；Impeller 4 and 1 inner wall of pump case
Equipped with shell wear ring 15；It is driven by impeller key 26 between impeller 4 and main shaft.
Shaft sleeve key 25 is equipped between axle sleeve 18 and main shaft 3；It is sleeved on axle sleeve 18 outside seal cage 13, both sides gap filler 14
Filling, pump chamber is connected by the pipeline 36 of the top of seal cage 13 with 14 cavity of filler, therefore water is led to and is sealed herein, pipe
Road 36 is connected to the external world and has plug screw A24 at top, with equilibrium air pressure.
The course of work of the efficient sealed feed pump of the present invention is that motor drives pump shaft 3 and impeller 4 to revolve by shaft coupling 27
Turn, pump is started to work.Liquid is inhaled into pump chamber 40 through pump inlet lid 2, and liquid is discharged by water outlet 39.In start-up operation
Before, liquid is filled in pump chamber 40, after startup, centrifugal force dishes out liquid to outer rim caused by the high speed rotation of impeller 4,
Impeller kinetic energy is converted to the pressure energy of liquid, and liquid compression force effect is discharged, and impeller 4 is centrally formed certain true at this time
Sky, therefore liquid continually can be sucked and be discharged.
Since the liquid of wheel backface is not involved in rotation, pressure is higher than the pressure of liquid in impeller, the balance of setting
Two parts space is connected to by hole 37, therefore can balance the pressure of impeller front-back, eliminates axial thrust.The pipeline 36 of setting
Packing cavity is connected with pump chamber 40, liquid can be led at packing cavity to plug the gap by pipeline 36, prevented gas leakage leakage, reached
To good sealing effect.
Prolonged operating can make the lubricating oil temperature in bearing block 6 increase, and cause air pressure in bearing block to increase, pass through
Gas inside bearing block can be discharged, have the function that equilibrium air pressure by the porous plug 54 on 19 top of oil level indicator.Lower part
Oil level display pole 55 is marked with scale, and oil level indicator 19 is taken off to the height that can observe the lubricating oil inside bearing block, can
With timely repairing.
When pumping on the shelf, plug screw 28 can be laid down the ponding in pump chamber 40 is discharged, prevent placement for a long time from causing
It gets rusty.
The nominal parameter of the efficient sealed feed pump of the present invention：Rotating speed 1450r/min, flow 400m3/ h, temperature 5 DEG C~53
DEG C, output power of motor 60kw, voltage 380V.
Claims (10)
1. a kind of efficient sealed feed pump, which is characterized in that including pump case (1), seal assembly, bearing block (6) and be arranged in axis
Main shaft (3) in bearing (6), one end of main shaft (3) is located in pump case (1) to be connect with impeller (4), and the other end has by key connection
Shaft coupling (27)；Bearing block (6) is connected with pump case (1) by stud B (32)；There is bearing cap (7) at bearing block (6) both ends, described
Bearing cap (7) be fixed on bearing block (6) by bolt (8).
2. efficient sealed feed pump according to claim 1, which is characterized in that one end of the pump case (1) be equipped with into
The mouth of a river (38) is provided with water outlet (39) above pump case (1), and the water inlet (38) is equipped with pump inlet lid (2), pump into
Lid (2) is connected with pump case (1) by stud (34) C, there is import lid gasket (10) between pump inlet lid (2) and pump case (1).
3. efficient sealed feed pump according to claim 2, which is characterized in that the water inlet (38) and water outlet
(39) axis is vertical, and the axis of the water inlet (38) is identical as the axis direction of main shaft (3), water inlet (38) and water outlet
It is equipped with screw thread on the inside of mouth (39).
4. efficient sealed feed pump according to claim 1, which is characterized in that the main shaft (3) and impeller (4) equal position
Among pump case (1), impeller (4) is fixed on by locknut B (23) on main shaft (3), is set between impeller (4) and pump case (1)
It is equipped with shell wear ring (15), check washer (22), impeller (4) and main shaft (3) are provided between nut B (23) and main shaft (3)
Between pass through impeller key (26) be driven.
5. efficient sealed feed pump according to claim 1, which is characterized in that the impeller (4) is equipped with balance hole
(37), there are one balance holes (37) on each blade of impeller (4), it is ensured that surface pressure is consistent before and after impeller (4), to keep away
Exempt from imbalance of pressure and causes gas leakage at axle sleeve (18).
6. efficient sealed feed pump according to claim 1, which is characterized in that the seal assembly includes being sleeved on main shaft
(3) external axle sleeve (18), the seal cage (13) and filler (14) being sleeved on axle sleeve are equipped between axle sleeve (18) and main shaft (3)
Shaft sleeve key (25)；It is sleeved on axle sleeve (18) outside seal cage (13), both sides gap is filled with filler (14), and filler (14) passes through filler
Gland (12) is enclosed in packing cavity, by stud A (20) that gland (12) are fixed.
7. efficient sealed feed pump according to claim 6, which is characterized in that the pipe of the top of the seal cage (13)
Pump chamber (40) is connected by road (36) with filler (14) cavity, therefore water is led at seal cage (13) and is sealed, pipeline (36)
Connection is extraneous and has plug screw A (24) at top, with equilibrium air pressure.
8. efficient sealed feed pump according to claim 1, which is characterized in that be equipped with water blocking before the bearing cap (7)
Ring (17), drip ring can prevent gap of the liquid between bearing cap (7) and main shaft (3) from entering bearing block (6), the axis
It holds and is equipped with oil sealing (11) in lid (7), prevent oil leak.Bearing block (6) lower part is provided with tubulose vernier (16), the setting of bearing block top
There is oil level indicator (19).
9. efficient sealed feed pump according to claim 8, which is characterized in that the structure of the oil level indicator (19) is by position
Porous plug (54) in top and oil level display pole (55) composition positioned at porous plug lower part.
10. efficient sealed feed pump according to claim 1, which is characterized in that the shaft coupling (27) is by half shaft coupling
Device A (42) and half a coupler B (43) compositions, are separately connected main shaft (3) and motor shaft (41), and screw A (46) is by half a coupler A
(42) it is fixed on main shaft (3) with key A (44), half a coupler B (43) and key B (45) are fixed on motor shaft by screw B (47)
(41) on, passing power, elastic ring are connected by stud (48) between the half a coupler A (42) and half a coupler B (43)
(52) it is sleeved on stud (48).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810331534.0A CN108716468A (en) | 2018-04-13 | 2018-04-13 | A kind of efficient sealed feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810331534.0A CN108716468A (en) | 2018-04-13 | 2018-04-13 | A kind of efficient sealed feed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108716468A true CN108716468A (en) | 2018-10-30 |
Family
ID=63899073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810331534.0A Pending CN108716468A (en) | 2018-04-13 | 2018-04-13 | A kind of efficient sealed feed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108716468A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173431A (en) * | 2019-05-17 | 2019-08-27 | 陕西科技大学 | A kind of fire-fighting pump-feeding |
| CN110645189A (en) * | 2019-10-27 | 2020-01-03 | 兰州理工大学 | Device and method for testing liquid leakage amount of impeller balance hole of centrifugal pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201372956Y (en) * | 2009-01-05 | 2009-12-30 | 江苏双达工程技术研究中心有限公司 | Cartridge packing seal box for pump |
| CN201412353Y (en) * | 2009-05-26 | 2010-02-24 | 博山精工泵业有限公司 | Packing-sealed single-stage water-ring vacuum pump |
| CN102022339A (en) * | 2009-09-23 | 2011-04-20 | 上海阿波罗机械股份有限公司 | Component cooling water pump for nuclear power plant |
| CN103953552A (en) * | 2014-04-18 | 2014-07-30 | 陕西科技大学 | Anion exchanger water feed pump |
-
2018
- 2018-04-13 CN CN201810331534.0A patent/CN108716468A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201372956Y (en) * | 2009-01-05 | 2009-12-30 | 江苏双达工程技术研究中心有限公司 | Cartridge packing seal box for pump |
| CN201412353Y (en) * | 2009-05-26 | 2010-02-24 | 博山精工泵业有限公司 | Packing-sealed single-stage water-ring vacuum pump |
| CN102022339A (en) * | 2009-09-23 | 2011-04-20 | 上海阿波罗机械股份有限公司 | Component cooling water pump for nuclear power plant |
| CN103953552A (en) * | 2014-04-18 | 2014-07-30 | 陕西科技大学 | Anion exchanger water feed pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173431A (en) * | 2019-05-17 | 2019-08-27 | 陕西科技大学 | A kind of fire-fighting pump-feeding |
| CN110645189A (en) * | 2019-10-27 | 2020-01-03 | 兰州理工大学 | Device and method for testing liquid leakage amount of impeller balance hole of centrifugal pump |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181030 |
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| RJ01 | Rejection of invention patent application after publication |