CN111852876A - High-efficiency energy-saving multistage middle-open double-suction pump - Google Patents
High-efficiency energy-saving multistage middle-open double-suction pump Download PDFInfo
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- CN111852876A CN111852876A CN202010425319.4A CN202010425319A CN111852876A CN 111852876 A CN111852876 A CN 111852876A CN 202010425319 A CN202010425319 A CN 202010425319A CN 111852876 A CN111852876 A CN 111852876A
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- wedge
- double
- suction pump
- pump
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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
- F04D1/006—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps double suction 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
- F04D29/086—Sealings 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides an efficient energy-saving multistage middle-open double-suction pump which comprises a base, a pump body, a main impeller and a sealing ring, wherein a water inlet and a water outlet are formed in two sides of the main impeller, and a water flow channel is formed between the water inlet and the water outlet. The water flow channel comprises at least one sloping plate microstructure, and a plurality of sloping plate microstructures are arranged into a plurality of parallel structures: the first-stage inclined pipe and the second-stage inclined pipe, and so on. The water inlet is positioned at the inlet of the first-stage inclined pipe. The sealing ring comprises a wedge-shaped flat end and an inclined end; a wedge-shaped groove is formed between the wedge-shaped flat end and the inclined end; the sealing ring is fixedly arranged on the double-suction pump through the matching of the wedge-shaped groove and the wedge-shaped flat end and the inclined end. The invention redesigns the water flow channel and optimizes the water flow channel; the sealing ring and the impeller opening ring form a wedge-shaped matching surface to prevent high-pressure fluid from flowing to the low-pressure end, so that the matching length of the sealing surface is increased, and the flowing state of inlet liquid flow is actively improved, so that the volume and hydraulic efficiency of the pump are improved, and the requirements of high efficiency and energy conservation are met.
Description
Technical Field
The invention belongs to the technical field of pump bodies, and particularly relates to an efficient energy-saving multistage middle-open double-suction pump.
Background
The double suction pump is an important form of the centrifugal pump, and is widely applied to engineering due to the characteristics of high lift, large flow and the like. This pump type impeller is actually made up of two back-to-back impellers, the water flow from the impellers merging into a volute.
The rivers passageway of current double entry pump is hollow crooked pipe, and crooked pipe can form the impact bounce-back at rivers impact next side atress, and rivers impact to crooked position, forms reverse effort, forms direction thrust to the fluid skin, leads to rivers to form local turbulent state at crooked pipe, and this kind of reverse effort destroys the laminar flow state, has the harm to the efficiency of water pump, so need improve the influence that reduces the reverse effort to the passageway, improves water pump efficiency. Meanwhile, the double-suction pump sealing ring is designed, in order to meet casting errors and not influence pump assembly, or in order to be convenient to process, an impeller opening ring and the sealing ring are processed into a straight shape, and the gap is generally 0.25-0.5 mm. The sealing ring is a device for preventing liquid flow from flowing from a high-pressure cavity to a low-pressure cavity of the pump, the sealing performance is required to be optimized in design, the leakage amount of the sealing ring is required to be reduced, and the most direct method for reducing the leakage amount is three measures of reducing a matching surface gap, increasing the length of a sealing surface and increasing the overcurrent gap damping. Reducing the seal face clearance is undesirable from a reliability standpoint because it causes mechanical friction to the pump rotor, increasing the failure rate of the equipment. Increasing the length of the sealing surface correspondingly increases the axial length of the pump shaft, which increases the deflection of the shaft and the installation space of the pump, and is not desirable from the economic viewpoint.
Disclosure of Invention
Aiming at the problems existing in the prior technical scheme, the invention aims to provide an efficient energy-saving multistage middle-open double-suction pump.
In order to achieve the purpose, the invention provides the following technical scheme:
an energy-efficient multi-stage middle-open double suction pump, comprising:
a base;
a pump body mounted on the base;
a main shaft disposed in the pump body;
the main impeller is sleeved on the main shaft;
the two sides of the main impeller are not closed to form a water inlet of the double-suction pump; the outer circle of the main impeller is provided with an annular hollow groove to form a water outlet of the double-suction pump; a water flow channel is formed between the water inlet and the water outlet and comprises at least one inclined plate microstructure, when a plurality of inclined plate microstructures exist, the inclined plate microstructures are arranged into a parallel multi-column structure, the inclined plate microstructure in a first column from one side to the other side is defined as a first-stage inclined pipe, the inclined plate microstructure in a second column is defined as a second-stage inclined pipe, and the like; the water inlet is positioned at the inlet of the first-stage inclined pipe;
the multistage middle-open double-suction pump further comprises:
the inducer is sleeved at two ends of the main shaft;
the sealing ring is sleeved on the outer circle of the main impeller; the main impeller is sealed with the pump body through a sealing ring; the sealing ring comprises a wedge-shaped flat end and a wedge-shaped inclined end; a wedge-shaped groove is formed between the wedge-shaped flat end and the wedge-shaped inclined end, the wedge-shaped flat end is in butt joint with the pump cover, and the wedge-shaped groove is clamped on the pump body; the sealing ring is fixedly arranged on the double-suction pump through the matching of the wedge-shaped groove with the wedge-shaped flat end and the wedge-shaped inclined end.
As a further improvement of the scheme, the wedge-shaped groove and the wedge-shaped inclined end form a long-distance sealing surface, and the length of the sealing surface ranges from 20 mm to 80 mm.
As a further improvement of the above scheme, the multistage middle-open double-suction pump further comprises a damping mechanism which is arranged between the pump body and the base; the damping mechanism comprises a damping pad, a damping box, a sliding block, a damping steel plate, a supporting rod and a supporting table; the damping pad is connected to the bottom surface of the base, a sliding groove is formed in the upper surface of the damping pad, and two symmetrical sliding blocks are clamped in the sliding groove; the damping box is fixedly connected to the upper surface of the base, the damping box is positioned right above the two sliding grooves, a damping steel plate in a shape like a Chinese character 'ji' is placed in the damping box, and the upper surfaces of the two sliding blocks are fixedly connected with the bottom surface of the damping steel plate; the upper end joint support pole of shock attenuation steel sheet, fixed brace table on the bracing piece, the pump body is fixed to the brace table up end.
As the further improvement of the above scheme, the outer surface of the supporting rod is sleeved with a spring, the upper surface of the spring is fixedly connected with the bottom surface of the supporting table, and the bottom surface of the spring is fixedly connected with the upper surface of the damping box.
As a further improvement of the scheme, the horizontal length value of the shock pad is equal to that of the base, two symmetrical mounting holes are formed in the upper surface of the base, and the two mounting holes are located on two sides of the shock absorption box respectively.
As a further improvement of the above scheme, two ends of a main impeller positioning position on a main shaft of the double suction pump are provided with threads, the threads at the two ends are respectively provided with a double-round nut, and the double-round nuts at the two ends fix the main impeller.
As a further improvement of the scheme, the end part of the inducer is gradually expanded outwards from small to large to form a conical structure.
As a further improvement of the scheme, flat keys for driving the inducer to rotate are arranged at two ends of the main shaft.
As a further improvement of the scheme, the middle part of the main shaft is also provided with a main flat key for driving the main impeller to rotate.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention redesigns the water flow channel and optimizes the water flow channel; the original bent round pipe is designed to be provided with a plurality of groups of micro-plate structures, and the multi-group micro-plate structures decompose the impact of water flow at the bent part, so that the disorder of the water flow in the pipeline is effectively prevented, and the efficiency of the pump body is improved; the sealing ring and the impeller opening ring form a wedge-shaped matching surface to prevent high-pressure fluid from flowing to the low-pressure end, so that the matching length of the sealing surface is increased, and the flowing state of inlet liquid flow is actively improved, so that the volume and hydraulic efficiency of the pump are improved, and the requirements of high efficiency and energy conservation are met.
(2) This double entry pump utilizes spring and shock attenuation steel sheet can fully absorb the vibrations that well open double entry pump body produced through setting up damper to effectively avoid well open double entry pump body because of the noise that vibrations produced, thereby effectively avoid the noise conduction to the outside of well open double entry pump body inside production.
(3) The inducer is arranged at the two ends of the main shaft, and the medium can be guaranteed to effectively enter the water inlet of the main impeller under the action of pressure when the inducer rotates, so that the steam can not enter the main impeller, and the cavitation phenomenon is avoided.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the pump body configuration of the present invention;
FIG. 3 is a schematic view of the connection structure of the main shaft and the main impeller;
FIG. 4 is a schematic view of the seal ring and pump body attachment arrangement of the present invention;
FIG. 5 is a schematic view of the seal ring structure of the present invention.
The figure is marked with: 1-base, 2-shock pad, 3-mounting hole, 4-sliding groove, 5-shock box, 6-sliding block, 7-shock steel plate, 8-supporting rod, 9-spring, 10-supporting table, 11-pump body, 30-main impeller, 31-main shaft, 32-thread, 33-double-round nut, 34-water inlet, 35-water outlet, 36-inducer, 37-sealing ring, 38-flat key, 39-main flat key, 310-pump cover, 341-first-stage inclined tube, 342-second-stage inclined tube, 343-guide strip, 370-wedge-shaped flat end, 370-wedge-shaped inclined end and 372-wedge-shaped groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, the high-efficiency energy-saving multi-stage split double suction pump of this embodiment includes a base 1, a pump body 11, a main shaft 31, a main impeller 30, an inducer 36, a sealing ring 37, a plurality of swash plate microstructures, and a damping mechanism.
The pump body 11 is arranged on the base 1; main shaft 31 is disposed in pump body 11; the main impeller 30 is sleeved on the main shaft 31. The two sides of the main impeller 30 are not closed, forming the water inlet 34 of the double suction pump; the outer circle of the main impeller 30 is provided with an annular hollow groove to form a water outlet 35 of the double suction pump; a water flow channel is formed between the water inlet 34 and the water outlet 35, the water flow channel comprises at least one inclined plate microstructure, when a plurality of inclined plate microstructures exist, the inclined plate microstructures are arranged into a parallel multi-column structure, the inclined plate microstructure in the first column from one side to the other side is defined as a first-stage inclined pipe 341, the inclined plate microstructure in the second column is defined as a second-stage inclined pipe 342, and the like; the water inlet 34 is located at the inlet of the first stage inclined tube 341.
Design into original crooked pipe and have the multiunit microplate structure, multiunit microplate structure gives the decomposition to rivers at the impact of bending, has effectively prevented the disorder of rivers in the pipeline, has improved the efficiency of the pump body.
The sealing ring 37 is sleeved on the outer circle of the main impeller 30; the main impeller 30 is sealed with the pump body 11 by a sealing ring 37; seal ring 37 includes a wedge-shaped flat end 370 and a wedge-shaped beveled end 371; a wedge-shaped groove 372 is formed between the wedge-shaped flat end 370 and the wedge-shaped inclined end 371, the wedge-shaped flat end 370 is in butt joint with the pump cover 310, and the wedge-shaped groove 372 is clamped on the pump body 11; the sealing ring 37 is fixedly arranged on the double suction pump by matching the wedge-shaped groove 372 with the wedge-shaped flat end 370 and the wedge-shaped inclined end 371. The wedge-shaped groove 372 and the wedge-shaped inclined end 371 form a long-distance sealing surface, and the length of the sealing surface ranges from 20 mm to 80 mm.
The calculation formula of the leakage amount of the sealing ring is as follows:
q＝(2πR1b(2gHm)^0.5)/((1+0.5η+λL/(2b))^0.5)
wherein q represents the leakage amount of the seal ring, pi/g represents a constant, R1 represents the diameter of the seal ring, b represents the fit clearance of the seal surface, Hm represents the pressure drop across the clearance, eta represents the fillet coefficient, lambda represents the on-way resistance coefficient, and L represents the length of the fit surface of the seal.
From the above formula, after using this embodiment sealing ring, L increases relatively, adopts the wedge structure, and its eta fillet coefficient also becomes big, and all the other parameters are unchangeable, and the sealing ring leaks the leakage quantity and reduces, and pump volumetric efficiency increases.
Meanwhile, compared with a flat and straight sealing surface in the prior art, the adopted wedge-shaped sealing surface increases the matching length of the sealing surface and increases the liquid flow damping of the sealing surface, thereby improving the volumetric efficiency of the pump.
It should be pointed out that, the liquid stream that flows through this sealing ring is unanimous with impeller import liquid stream mobile state, do not form the swirl in the impeller import, derive simultaneously according to the pump design theory, the pump is when deviating from the design operating mode point, the secondary backward flow phenomenon of impeller import is comparatively serious, thereby influence the regional efficiency of pump low discharge, this sealing ring is through the sealed face of wedge structure, there is the guide effect to the liquid stream that flows through, directly get into the impeller import, there is serious hindrance effect to impeller import secondary backward flow liquid, thereby improve low discharge mobile state, improve the high-efficient district scope of pump.
The damping mechanism is arranged between the pump body 11 and the base 1; the damping mechanism comprises a damping pad 2, a damping box 5, a sliding block 6, a damping steel plate 7, a supporting rod 8 and a supporting platform 10; the damping pad 2 is connected to the bottom surface of the base 1, the upper surface of the damping pad 2 is provided with a sliding chute 4, and two symmetrical sliding blocks 6 are clamped inside the sliding chute 4; the damping box 5 is fixedly connected to the upper surface of the base 1, the damping box 5 is positioned right above the two sliding grooves 4, the damping steel plate 7 in a shape like a Chinese character 'ji' is placed in the damping box 5, and the upper surfaces of the two sliding blocks 6 are fixedly connected with the bottom surface of the damping steel plate 7; the upper end of the damping steel plate 7 is connected with a support rod 8, a support table 10 is fixed on the support rod 8, and a pump body 11 is fixed on the upper end face of the support table 10.
The outer surface of the supporting rod 8 is sleeved with a spring 9, the upper surface of the spring 9 is fixedly connected with the bottom surface of the supporting table 10, and the bottom surface of the spring 9 is fixedly connected with the upper surface of the shock absorption box 5.
The horizontal length value of shock pad 2 equals with the horizontal length value of base 1, and two symmetrical mounting holes 3 have been seted up to the upper surface of base 1, and two mounting holes 3 are located the both sides of surge tank 5 respectively.
Through setting up spring 9 and shock attenuation steel sheet 7, can fully absorb the vibrations that well open double entry pump body produced, thereby effectively avoid well open double entry pump body because of the noise that vibrations produced, through setting up shock pad 2, can effectual isolated outside vibrations conduction to the pump body, thereby produce with the pump body and shake altogether and lead to the device noise increase, through setting up mounting hole 3, make user convenient installation the device, the effectual bottom surface collision damper that prevents spring 9 elasticity inefficacy and cause well open double entry pump body, and lead to well open double entry pump body inside spare part to damage.
The key points of the invention are as follows: the end of the inducer 36 is gradually expanded outwards from small to large, and has a conical structure. The two ends of the main shaft 31 are provided with flat keys 39 for driving the inducer 36 to rotate. The main shaft 31 is also provided with a main flat key 38 in the middle for driving the main impeller 30 to rotate. The inducer 36 is sleeved at two ends of the main shaft 31. Under the pressure effect when the inducer rotates, the medium can be ensured to effectively enter the water inlet of the main impeller, so that the steam can not enter the main impeller, and the cavitation phenomenon is avoided. This is a design feature not present in conventional bi-directional pumps.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.
Claims (9)
1. An energy-efficient multi-stage middle-open double-suction pump, comprising:
a base (1);
a pump body (11) mounted on the base (1);
a main shaft (31) provided in the pump body (11);
a main impeller (30) which is sleeved on the main shaft (31);
The double-suction pump is characterized in that two sides of the main impeller (30) are not closed to form a water inlet (34) of the double-suction pump; the outer circle of the main impeller (30) is provided with an annular hollow groove to form a water outlet (35) of the double-suction pump; a water flow channel is formed between the water inlet (34) and the water outlet (35), the water flow channel comprises at least one inclined plate microstructure, when a plurality of inclined plate microstructures exist, the inclined plate microstructures are arranged into a parallel multi-column structure, the inclined plate microstructure in a first column from one side to the other side is defined as a first-stage inclined pipe (341), the inclined plate microstructure in a second column is defined as a second-stage inclined pipe (342), and the like; the water inlet (34) is positioned at the inlet of the first-stage inclined pipe (341);
the multistage middle-open double-suction pump further comprises:
the inducer (36) is sleeved at two ends of the main shaft (31);
a seal ring (37) which is sleeved on the outer circle of the main impeller (30); the main impeller (30) is sealed with the pump body (11) through a sealing ring (37); the sealing ring (37) comprises a wedge-shaped flat end (370) and a wedge-shaped inclined end (371); a wedge-shaped groove (372) is formed between the wedge-shaped flat end (370) and the wedge-shaped inclined end (371), the wedge-shaped flat end (370) is in butt joint with the pump cover (310), and the wedge-shaped groove (372) is clamped on the pump body (11); the sealing ring (37) is fixedly arranged on the double-suction pump through the wedge-shaped groove (372) matched with the wedge-shaped flat end (370) and the wedge-shaped inclined end (371).
2. The high-efficiency energy-saving multistage split double-suction pump as claimed in claim 1, wherein the wedge-shaped groove (372) and the wedge-shaped inclined end (371) form a long-distance sealing surface, and the length of the sealing surface ranges from 20 mm to 80 mm.
3. The high-efficiency energy-saving type multi-stage middle-open double-suction pump is characterized by further comprising a damping mechanism, wherein the damping mechanism is arranged between the pump body (11) and the base (1); the damping mechanism comprises a damping pad (2), a damping box (5), a sliding block (6), a damping steel plate (7), a supporting rod (8) and a supporting table (10); the shock absorption pad (2) is connected to the bottom surface of the base (1), a sliding groove (4) is formed in the upper surface of the shock absorption pad (2), and two symmetrical sliding blocks (6) are clamped in the sliding groove (4); the damping box (5) is fixedly connected to the upper surface of the base (1), the damping box (5) is located right above the two sliding grooves (4), a damping steel plate (7) in a shape like a Chinese character 'ji' is placed in the damping box (5), and the upper surfaces of the two sliding blocks (6) are fixedly connected with the bottom surface of the damping steel plate (7); the upper end of shock attenuation steel sheet (7) is connected bracing piece (8), fixed brace table (10) on bracing piece (8), the pump body (11) is fixed to brace table (10) up end.
4. The high-efficiency energy-saving multi-stage middle-open double-suction pump as claimed in claim 3, wherein the outer surfaces of the support rods (8) are sleeved with springs (9), the upper surfaces of the springs (9) are fixedly connected with the bottom surface of the support table (10), and the bottom surfaces of the springs (9) are fixedly connected with the upper surface of the shock absorption box (5).
5. The high-efficiency energy-saving multistage middle-open double-suction pump as claimed in claim 3, wherein the horizontal length of the shock pad (2) is equal to that of the base (1), two symmetrical mounting holes (3) are formed in the upper surface of the base (1), and the two mounting holes (3) are respectively located on two sides of the shock absorption box (5).
6. The high-efficiency energy-saving multi-stage split open double suction pump as claimed in claim 1, wherein threads (32) are formed at two ends of a positioning position of a main impeller (30) on a main shaft (31) of the double suction pump, double round nuts (33) are respectively mounted on the threads at the two ends, and the double round nuts (33) at the two ends fix the main impeller (30).
7. The high-efficiency energy-saving multi-stage split double-suction pump as claimed in claim 1, wherein the end of the inducer (36) is gradually expanded outwards from small to large to form a conical structure.
8. The high-efficiency energy-saving multistage split double-suction pump as claimed in claim 1, wherein flat keys (39) for driving the inducer (36) to rotate are arranged at two ends of the main shaft (31).
9. The high-efficiency energy-saving multi-stage middle-opening double-suction pump as claimed in claim 1, wherein a main flat key (38) for driving the main impeller (30) to rotate is further arranged in the middle of the main shaft (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010425319.4A CN111852876A (en) | 2020-05-19 | 2020-05-19 | High-efficiency energy-saving multistage middle-open double-suction pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010425319.4A CN111852876A (en) | 2020-05-19 | 2020-05-19 | High-efficiency energy-saving multistage middle-open double-suction pump |
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| Publication Number | Publication Date |
|---|---|
| CN111852876A true CN111852876A (en) | 2020-10-30 |
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ID=72985156
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|---|---|---|---|
| CN202010425319.4A Pending CN111852876A (en) | 2020-05-19 | 2020-05-19 | High-efficiency energy-saving multistage middle-open double-suction pump |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2823613Y (en) * | 2005-07-10 | 2006-10-04 | 曹大清 | Single suction double runner double closed vane |
| CN202402338U (en) * | 2011-12-08 | 2012-08-29 | 上海邦浦实业集团有限公司 | Novel positioning structure of double suction pump impeller |
| CN203308772U (en) * | 2013-06-21 | 2013-11-27 | 上海太平洋制泵(集团)有限公司 | Double-suction pump |
| CN105756991A (en) * | 2016-01-07 | 2016-07-13 | 江苏大学 | Double-suction multi-flow-channel impeller and design method thereof |
| JP2018059441A (en) * | 2016-10-05 | 2018-04-12 | 株式会社荏原製作所 | Double suction pump |
| CN207728609U (en) * | 2018-01-02 | 2018-08-14 | 上海宝冶工程技术有限公司 | A kind of novel sealing ring applied to double entry pump |
| CN108443166A (en) * | 2018-05-10 | 2018-08-24 | 约翰斯顿流体科技（无锡）有限公司 | Double entry pump is opened in a kind of squelch type |
-
2020
- 2020-05-19 CN CN202010425319.4A patent/CN111852876A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2823613Y (en) * | 2005-07-10 | 2006-10-04 | 曹大清 | Single suction double runner double closed vane |
| CN202402338U (en) * | 2011-12-08 | 2012-08-29 | 上海邦浦实业集团有限公司 | Novel positioning structure of double suction pump impeller |
| CN203308772U (en) * | 2013-06-21 | 2013-11-27 | 上海太平洋制泵(集团)有限公司 | Double-suction pump |
| CN105756991A (en) * | 2016-01-07 | 2016-07-13 | 江苏大学 | Double-suction multi-flow-channel impeller and design method thereof |
| JP2018059441A (en) * | 2016-10-05 | 2018-04-12 | 株式会社荏原製作所 | Double suction pump |
| CN207728609U (en) * | 2018-01-02 | 2018-08-14 | 上海宝冶工程技术有限公司 | A kind of novel sealing ring applied to double entry pump |
| CN108443166A (en) * | 2018-05-10 | 2018-08-24 | 约翰斯顿流体科技（无锡）有限公司 | Double entry pump is opened in a kind of squelch type |
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Application publication date: 20201030 |