CN113464443A - Guide vane fixed two-stage supercharging centrifugal pump - Google Patents

Abstract

The application discloses a guide impeller fixed type two-stage supercharging centrifugal pump, which comprises a volute main body, a cover plate, a first impeller, a guide impeller, a second impeller and a power source, wherein the cover plate is installed on the volute main body; the output shaft of power supply runs through second impeller, impeller and first impeller in proper order, and first impeller and second impeller all are fixed in the output shaft of power supply, leave the gap between the week side of impeller and the inside wall of spiral case main part. The application has the following expected technical effects: the hydrodynamic force can not be consumed to drive the guide impeller to rotate, the hydrodynamic force loss is less, the supercharging effect is greatly improved, and the guide impeller fixedly arranged is not easy to damage.

Description

Guide vane fixed two-stage supercharging centrifugal pump

Technical Field

The application relates to the technical field of centrifugal pumps, in particular to a guide impeller fixed type two-stage supercharging centrifugal pump.

Background

Centrifugal pumps operate by causing water to move centrifugally as a result of the rotation of an impeller. Before the water pump is started, the pump shell and the water suction pipe are filled with water, then the power source is started, the pump shaft drives the impeller and the water to rotate at a high speed, the water is thrown to the outer edge of the impeller and flows into a water pressure pipeline of the water pump through a flow channel of the volute-shaped pump shell. A multistage centrifugal pump: that is, two or more than two impellers are arranged on the pump shaft, and the total lift of the centrifugal pump is the sum of the lifts generated by the N impellers. However, the guide vane wheel in the common multistage centrifugal pump rotates along with the power source, and the guide vane wheel which is arranged in a rotating manner can obviously reduce the power of water flow in the pump shell, so that the water supercharging effect is poor, and the guide vane wheel which is arranged in a rotating manner is easier to damage.

Disclosure of Invention

The utility model provides a lead fixed two-stage supercharging centrifugal pump of impeller, the impeller rotates to set up in order to lead to the problem that the pressure boost effect is not good, and lead the impeller and also damage more easily to water in order to improve common multistage centrifugal pump. The application provides a fixed two-stage supercharging centrifugal pump of guide vane wheel adopts following technical scheme: a guide impeller fixed type two-stage supercharging centrifugal pump comprises a volute main body, a cover plate, a first impeller, a guide impeller, a second impeller and a power source, wherein the cover plate is detachably mounted at an opening of the volute main body, a water inlet part is arranged on the cover plate, a water outlet part is arranged on the side edge of the volute main body, the power source is mounted on the surface, far away from the cover plate, of the volute main body, an output shaft of the power source extends into the volute main body, the first impeller, the guide impeller and the second impeller are all located inside the volute main body and are coaxially arranged, and the guide impeller is fixedly mounted in the volute main body; the output shaft of the power source sequentially penetrates through the second impeller, the guide impeller and the first impeller, the first impeller and the second impeller are fixed on the output shaft of the power source, and a gap is reserved between the peripheral side of the guide impeller and the inner side wall of the volute main body; the water inlet of first impeller is located the center of first impeller is arranged and is communicate the portion of intaking, the delivery port of first impeller is provided with a plurality ofly and is located the periphery of first impeller is arranged, the water inlet of leading the impeller is provided with a plurality ofly and is located the periphery of leading the impeller is arranged, the delivery port of leading the impeller is located the center of leading the impeller is arranged, the water inlet of second impeller is located the center of second impeller is arranged, the delivery port of second impeller is provided with a plurality ofly and is located the periphery of second impeller is arranged, the delivery port intercommunication of second impeller the portion of intaking. By adopting the technical scheme, when the power source works, the output shaft of the power source can drive the first impeller and the second impeller in the volute main body to rotate at a high speed, water enters from the water inlet part on the cover plate and then enters the first impeller from the water inlet of the first impeller, and the water can be thrown out from the water outlet of the first impeller due to the high-speed rotation of the first impeller, so that the one-stage accelerated pressurization is realized; the water flow in the gap enters the guide impeller from the water inlet of the guide impeller, the water flow in the guide impeller enters the second impeller from the water outlet of the guide impeller under the guide effect of the guide impeller, and then the water is thrown out from the water outlet of the second impeller due to the high-speed rotation of the second impeller, so that the two-stage accelerated pressurization is realized; because the guide impeller and the volute main body are fixedly connected, hydrodynamic force cannot be consumed to drive the guide impeller to rotate, hydrodynamic force loss is less, the supercharging effect is greatly improved, the guide impeller fixedly arranged is not easy to damage, and the service life of the centrifugal pump is indirectly prolonged. Optionally, the first impeller includes a first top plate, a first partition plate and a first bottom plate, the first partition plate is provided with a plurality of blocks and is arranged around the central axis of the first impeller at uniform intervals, the water inlet of the first impeller is located on the first top plate, the first partition plate is connected between the bottom surface of the first top plate and the top surface of the first bottom plate, and a plurality of first water passing channels are formed in the first impeller. Through adopting above-mentioned technical scheme, the first impeller of above-mentioned design, simple structure and firm, first water channel is little to the resistance of rivers, has further promoted the pressure boost effect. Optionally, the first partition plates are designed in an arc shape and arranged in the same direction. Through adopting above-mentioned technical scheme, the first baffle of arc design, it is littleer to the resistance of high-speed rivers that flow, has further promoted the pressure boost effect. Optionally, the guide impeller comprises a water guide top plate, a water guide partition plate and a water guide bottom plate, the water guide partition plate is provided with a plurality of blocks and is uniformly arranged around the central axis of the guide impeller at intervals, the water outlet of the guide impeller is located on the water guide bottom plate, and the water guide partition plate is connected between the bottom surface of the water guide top plate and the top surface of the water guide bottom plate and forms a plurality of water guide channels in the guide impeller. Through adopting above-mentioned technical scheme, the guide vane wheel of above-mentioned design, simple structure and firm, the resistance of water guide channel to rivers is little, has further promoted the pressure boost effect. Optionally, the water guide partition plates are designed in an arc shape and are arranged in the same direction. Through adopting above-mentioned technical scheme, the water guide baffle of arc design is littleer to the resistance of high-speed rivers that flow, has further promoted the pressure boost effect. Optionally, a plurality of pressurizing partition plates are arranged on the upper surface of the water guide top plate, the pressurizing partition plates are in arc design and are arranged in the same direction, the arrangement direction of the pressurizing partition plates is opposite to that of the first partition plates, the pressurizing partition plates are arranged around the first impeller, and a water outlet of the first impeller is communicated into a gap between the adjacent pressurizing partition plates. Through adopting above-mentioned technical scheme, first impeller is when high-speed rotating, under the promotion of first baffle, rivers can outwards throw away along first water channel, and the pressure boost baffle of relatively static can have better guide effect to the rivers of being thrown away, ensures that the rivers that flow at a high speed can be faster get into the water inlet of guide impeller, has further promoted the pressure boost effect. Optionally, the periphery of the water guide bottom plate is provided with a plurality of clamping grooves arranged at intervals, and the inner side wall of the volute main body is provided with a plurality of clamping blocks matched with the clamping grooves. Through adopting above-mentioned technical scheme, draw-in groove and fixture block cooperation are used, can make the stable and firm inside of installing at the spiral case main part of impeller, and structural stability is better, has indirectly promoted the pressure boost effect. Optionally, the second impeller includes a second top plate, a second partition plate and a second bottom plate, the second partition plate is provided with a plurality of blocks and is arranged around the central axis of the second impeller at uniform intervals, the water inlet of the second impeller is located on the second top plate, and the second partition plate is connected between the bottom surface of the second top plate and the top surface of the second bottom plate and forms a plurality of second water passing channels in the second impeller. Through adopting above-mentioned technical scheme, the second impeller of above-mentioned design, simple structure and firm, the resistance of second water channel to rivers is little, has further promoted the pressure boost effect. Optionally, the second partition plates are designed in an arc shape and arranged in the same direction. Through adopting above-mentioned technical scheme, the second baffle of arc design is littleer to the resistance of high-speed rivers that flow, has further promoted the pressure boost effect. Optionally, the power source is a motor or a fuel engine, a first annular step for blocking the second impeller is arranged inside the volute main body, and a second annular step for blocking the guide impeller is arranged inside the volute main body. By adopting the technical scheme, the motor or the fuel engine can provide stable and strong rotating power for the first impeller, the guide impeller and the second impeller; first annular platform provides stable mounted position for the second impeller, prevents effectively that the second impeller from rocking at will when high-speed rotating, and the second annular platform provides stable mounted position for leading the impeller, and it is more stable to lead the impeller, and the silence effect of this centrifugal pump during operation is better. In summary, the present application includes at least one of the following beneficial technical effects: the guide impeller is fixedly connected with the volute main body, so that hydrodynamic force cannot be consumed to drive the guide impeller to rotate, the hydrodynamic force loss is smaller, the supercharging effect is greatly improved, the guide impeller fixedly arranged is not easy to damage, and the service life of the centrifugal pump is indirectly prolonged; when the first impeller rotates at a high speed, under the pushing of the first partition plate, water flow can be thrown outwards along the first water passing channel, the relatively static pressurizing partition plate can have a good guiding effect on the thrown water flow, the high-speed flowing water flow can enter the water inlet of the guide impeller more quickly, and the pressurizing effect is further improved.

Drawings

Fig. 1 is a schematic structural view of a guide vane wheel fixed two-stage booster centrifugal pump according to an embodiment of the present application. Fig. 2 is a schematic structural diagram of a first impeller according to an embodiment of the present application. Fig. 3 is a schematic structural diagram of a guide vane wheel according to an embodiment of the present application. Fig. 4 is a schematic structural diagram of a second impeller according to an embodiment of the present application. FIG. 5 is a schematic structural diagram of a volute body according to an embodiment of the present application. Description of reference numerals: 1. A volute body; 11. a water outlet part; 12. a clamping block; 13. a first annular step; 14. a second annular step; 2. a cover plate; 21. a water inlet part; 3. a first impeller; 31. a first top plate; 32. a first separator; 33. a first base plate; 4. a guide vane wheel; 41. a water guide top plate; 42. a water guide clapboard; 43. a water guide bottom plate; 431. a card slot; 44. a pressurizing partition plate; 5. a second impeller; 6. a power source; 51. a second top plate; 52. a second separator; 53. a second base plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-5. The embodiment of the application discloses a guide impeller fixed type two-stage supercharging centrifugal pump. Referring to fig. 1, the guide vane wheel fixed two-stage supercharging centrifugal pump includes a volute body 1, a cover plate 2, a first vane wheel 3, a guide vane wheel 4, a second vane wheel 5 and a power source 6, where the power source 6 is a fuel engine (in other embodiments, a motor may also be used), the power source 6 is not shown in the drawings in this application, but the motor or the fuel engine is an accessory that can be directly purchased in the market, and the motor or the fuel engine can provide stable and strong rotation power for the first vane wheel 3, the guide vane wheel 4, and the second vane wheel 5. Apron 2 is through the removable opening part of installing in spiral case main part 1 of a round of bolt, be provided with the portion of intaking 21 on apron 2, the side of spiral case main part 1 is provided with out water portion 11, power supply 6 installs in spiral case main part 1 and keeps away from the surface of apron 2, the output shaft of power supply 6 stretches into the inside of spiral case main part 1, first impeller 3, guide wheel 4 and second impeller 5 all are located the inside of spiral case main part 1 and the coaxial line of three arranges, guide wheel 4 fixed mounting is in spiral case main part 1. An output shaft of the power source 6 sequentially penetrates through the second impeller 5, the guide impeller 4 and the first impeller 3, the first impeller 3 and the second impeller 5 are fixed on the output shaft of the power source 6, and a gap is reserved between the peripheral side of the guide impeller 4 and the inner side wall of the volute main body 1. The water inlet of the first impeller 3 is located at the center of the first impeller 3 and is communicated with the water inlet portion 21, the water outlet of the first impeller 3 is provided with a plurality of water outlets and is located at the periphery of the first impeller 3, the water inlet of the guide impeller 4 is provided with a plurality of water outlets and is located at the periphery of the guide impeller 4, the water outlet of the guide impeller 4 is located at the center of the guide impeller 4 and is arranged, the water inlet of the second impeller 5 is located at the center of the second impeller 5 and is arranged, the water outlet of the second impeller 5 is provided with a plurality of water outlets and is located at the periphery of the second impeller 5 and is arranged, and the water outlet of the second impeller 5 is communicated with the water outlet portion 11. Referring to fig. 1 and 2, the first impeller 3 includes a first top plate 31, a first partition plate 32 and a first bottom plate 33, the first partition plate 32 is provided with a plurality of blocks and is uniformly spaced around a central axis of the first impeller 3, a water inlet of the first impeller 3 is located on the first top plate 31, the first partition plate 32 is connected between a bottom surface of the first top plate 31 and a top surface of the first bottom plate 33 and forms a plurality of first water passing channels in the first impeller 3. The first impeller 3 of the design is simple and firm in structure, the resistance of the first water passing channel to water flow is small, and the supercharging effect is further improved. The first baffle 32 of polylith is arc design and syntropy arranges, and the contact surface of first baffle 32 and rivers is arc design, can further reduce the resistance of rivers, and the first baffle 32 of arc design is littleer to the resistance of high-speed rivers that flow, has further promoted the pressure boost effect. The intermediate position department of first impeller 3 is provided with the round hole that is connected with the output shaft of power supply 6, and the inside wall of round hole sets up the recess of a plurality of interval arrangements, and this recess and the output shaft syntropy of power supply 6 arrange, is provided with the sand grip with groove looks joint on the output shaft of power supply 6 to ensure that first impeller 3 and power supply 6's output shaft firmly connects. Referring to fig. 1 and 3, the guide vane wheel 4 includes a water guide top plate 41, a water guide partition plate 42 and a water guide bottom plate 43, the water guide partition plate 42 is provided with a plurality of blocks and is uniformly arranged around the central axis of the guide vane wheel 4 at intervals, the water outlet of the guide vane wheel 4 is located on the water guide bottom plate 43, the water guide partition plate 42 is connected between the bottom surface of the water guide top plate 41 and the top surface of the water guide bottom plate 43 and forms a plurality of water guide channels in the guide vane wheel 4. The guide impeller 4 of the design has a simple and firm structure, the resistance of the water guide channel to water flow is small, and the supercharging effect is further improved. The arrangement direction of the water guide partition plates 42 is the same as that of the first partition plates 32, the water guide partition plates 42 are in arc design and are arranged in the same direction, the contact surfaces of the water guide partition plates 42 and water flow are both in arc design, resistance of the water flow can be further reduced, the water guide partition plates 42 in arc design have smaller resistance to high-speed flowing water flow, and the pressurization effect is further improved. The upper surface of the water guide top plate 41 is provided with a plurality of pressurizing partition plates 44, the pressurizing partition plates 44 are arc-shaped and arranged in the same direction, the arrangement direction of the pressurizing partition plates 44 is opposite to that of the first partition plate 32, the pressurizing partition plates 44 are arranged around the first impeller 3, and the water outlet of the first impeller 3 is communicated into the gap between the adjacent pressurizing partition plates 44. When the first impeller 3 rotates at a high speed, under the pushing of the first partition plate 32, the water flow is thrown outwards along the first water passing channel, and the relatively stationary pressurizing partition plate 44 can have a better guiding effect on the thrown water flow, so that the water flow flowing at a high speed can enter the water inlet of the guide impeller 4 more quickly, and the pressurizing effect is further improved. The periphery of water guide bottom plate 43 is provided with the draw-in groove 431 of a plurality of interval arrangements, and the inside wall of spiral case main part 1 is provided with a plurality of fixture blocks 12 (see figure 5) with draw-in groove 431 looks adaptation, and fixture block 12 and draw-in groove 431 are semicircular design, and draw-in groove 431 and fixture block 12 cooperate the use, can make the stable and firm installation in spiral case main part 1 of guide vane wheel 4, and structural stability is better, has indirectly promoted the pressure boost effect. Referring to fig. 1 and 4, the second impeller 5 includes a second top plate 51, a second partition plate 52 and a second bottom plate 53, the second partition plate 52 is provided with a plurality of blocks and is uniformly spaced around a central axis of the second impeller 5, a water inlet of the second impeller 5 is located on the second top plate 51, the second partition plate 52 is connected between a bottom surface of the second top plate 51 and a top surface of the second bottom plate 53 and forms a plurality of second water passing channels in the second impeller 5. The second impeller 5 of the design is simple and firm in structure, the resistance of the second water passing channel to water flow is small, and the supercharging effect is further improved. The arrangement direction of the second partition plates 52 is the same as that of the first partition plates 32, the second partition plates 52 are in arc design and arranged in the same direction, the contact surfaces of the second partition plates 52 and water flow are both in arc design, resistance of the water flow can be further reduced, the resistance of the arc-shaped second partition plates 52 to the high-speed flowing water flow is smaller, and the supercharging effect is further improved. The intermediate position department of second impeller 5 is provided with the round hole that is connected with the output shaft of power supply 6, and the inside wall of round hole sets up the recess of a plurality of interval arrangements, and this recess and the output shaft syntropy of power supply 6 arrange, is provided with the sand grip with groove looks joint on the output shaft of power supply 6 to ensure that second impeller 5 and power supply 6's output shaft firmly connects. Referring to fig. 1 and 5, a first annular step 13 for blocking the second impeller 5 is disposed inside the volute main body 1, a plurality of screw mounting holes are disposed on the first annular step 13, the screw mounting holes are used for connecting the volute main body 1 and a housing of the power source 6, bolt cap sinking grooves are disposed on the screw mounting holes, a second annular step 14 for blocking the guide impeller 4 is disposed inside the volute main body 1, and the fixture block 12 is arranged to be attached to the surface of the second annular step 14. First annular table provides stable mounted position for second impeller 5, prevents effectively that second impeller 5 from rocking at will when high-speed rotating, and second annular table provides stable mounted position for leading impeller 4, and leading impeller 4 is more stable, and the silence effect of this centrifugal pump during operation is better. The water outlet part 11 comprises a plurality of water inlets arranged on the inner side wall of the volute main body 1, the water inlets are arranged on the inner side wall of the volute main body 1 at intervals in a surrounding mode and are arranged on a uniform plane with the water outlet of the second impeller 5, and the design is favorable for water flow to be rapidly collected into the water outlet part 11. The implementation principle of the guide impeller fixed type two-stage supercharging centrifugal pump in the embodiment of the application is as follows: when the power source 6 works, the output shaft of the power source can drive the first impeller 3 and the second impeller 5 in the volute main body 1 to rotate at a high speed, water enters from the water inlet part 21 on the cover plate 2 and then enters the first impeller 3 from the water inlet of the first impeller 3, and the water can be thrown out from the water outlet of the first impeller 3 due to the high-speed rotation of the first impeller 3, so that the one-stage accelerated pressurization is realized; the water flow in the gap enters the guide impeller 4 along the water inlet of the guide impeller 4, the water flow in the guide impeller 4 enters the second impeller 5 from the water outlet of the guide impeller 4 under the guiding action of the guide impeller 4, and then the water is thrown out from the water outlet of the second impeller 5 due to the high-speed rotation of the second impeller 5, so that the two-stage accelerated pressurization is realized; because leading fixed connection between impeller 4 and the spiral case main part 1, so can not consume the hydrodynamic force and go to drive and lead impeller 4 and rotate, the hydrodynamic loss is littleer, has promoted the pressure boost effect by a wide margin, and the fixed impeller 4 that leads that sets up is difficult to damage moreover, has prolonged the life of this centrifugal pump indirectly. The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides a fixed two-stage supercharging centrifugal pump of impeller that leads which characterized in that: the volute comprises a volute main body (1), a cover plate (2), a first impeller (3), a guide impeller (4), a second impeller (5) and a power source (6), wherein the cover plate (2) is detachably mounted at an opening of the volute main body (1), a water inlet part (21) is arranged on the cover plate (2), a water outlet part (11) is arranged on the side edge of the volute main body (1), the power source (6) is mounted on the surface, far away from the cover plate (2), of the volute main body (1), an output shaft of the power source (6) extends into the volute main body (1), the first impeller (3), the guide impeller (4) and the second impeller (5) are all located in the volute main body (1) and are coaxially arranged, and the guide impeller (4) is fixedly mounted in the volute main body (1); an output shaft of the power source (6) sequentially penetrates through the second impeller (5), the guide impeller (4) and the first impeller (3), the first impeller (3) and the second impeller (5) are fixed to the output shaft of the power source (6), and a gap is reserved between the peripheral side of the guide impeller (4) and the inner side wall of the volute main body (1); the water inlet of first impeller (3) is located the center of first impeller (3) is arranged and is communicate portion (21) of intaking, the delivery port of first impeller (3) is provided with a plurality ofly and is located the periphery of first impeller (3) is arranged, the water inlet of guide impeller (4) is provided with a plurality ofly and is located the periphery of guide impeller (4) is arranged, the delivery port of guide impeller (4) is located the center of guide impeller (4) is arranged, the water inlet of second impeller (5) is located the center of second impeller (5) is arranged, the delivery port of second impeller (5) is provided with a plurality ofly and is located the periphery of second impeller (5) is arranged, the delivery port intercommunication of second impeller (5) go out water portion (11).

2. The guide vane fixed two-stage booster centrifugal pump of claim 1, wherein: the first impeller (3) comprises a first top plate (31), a first partition plate (32) and a first bottom plate (33), the first partition plate (32) is provided with a plurality of blocks and is arranged around the central axis of the first impeller (3) at uniform intervals, a water inlet of the first impeller (3) is positioned on the first top plate (31), and the first partition plate (32) is connected between the bottom surface of the first top plate (31) and the top surface of the first bottom plate (33) and forms a plurality of first water passing channels in the first impeller (3).

3. The guide vane fixed two-stage booster centrifugal pump of claim 2, wherein: the first partition plates (32) are designed in an arc shape and are arranged in the same direction.

4. The guide vane fixed two-stage booster centrifugal pump of claim 1, wherein: the guide vane wheel (4) comprises a water guide top plate (41), a water guide partition plate (42) and a water guide bottom plate (43), the water guide partition plate (42) is provided with a plurality of blocks and is arranged around the central axis of the guide vane wheel (4) at uniform intervals, the water outlet of the guide vane wheel (4) is positioned on the water guide bottom plate (43), and the water guide partition plate (42) is connected between the bottom surface of the water guide top plate (41) and the top surface of the water guide bottom plate (43) and forms a plurality of water guide channels in the guide vane wheel (4).

5. The guide vane fixed two-stage booster centrifugal pump of claim 4, wherein: the water guide partition plates (42) are designed in an arc shape and are arranged in the same direction.

6. The guide vane fixed two-stage booster centrifugal pump of claim 5, wherein: the upper surface of the water guide top plate (41) is provided with a plurality of pressurizing partition plates (44), the pressurizing partition plates (44) are in arc design and are arranged in the same direction, the arrangement direction of the pressurizing partition plates (44) is opposite to that of the first partition plates (32), the pressurizing partition plates (44) are arranged around the first impeller (3), and the water outlet of the first impeller (3) is communicated into a gap between the adjacent pressurizing partition plates (44).

7. The guide vane fixed two-stage booster centrifugal pump of claim 4, wherein: the periphery of the water guide bottom plate (43) is provided with a plurality of clamping grooves (431) which are arranged at intervals, and the inner side wall of the volute body (1) is provided with a plurality of clamping blocks (12) matched with the clamping grooves (431).

8. The guide vane fixed two-stage booster centrifugal pump of claim 1, wherein: the second impeller (5) comprises a second top plate (51), a second partition plate (52) and a second bottom plate (53), the second partition plate (52) is provided with a plurality of blocks and is uniformly arranged around the central axis of the second impeller (5) at intervals, a water inlet of the second impeller (5) is positioned on the second top plate (51), and the second partition plate (52) is connected between the bottom surface of the second top plate (51) and the top surface of the second bottom plate (53) and forms a plurality of second water passing channels in the second impeller (5).

9. The guide vane fixed two-stage booster centrifugal pump of claim 8, wherein: the second partitions (52) are of arc-shaped design and are arranged in the same direction.

10. The guide vane fixed two-stage booster centrifugal pump of claim 1, wherein: the power source (6) is a motor or a fuel engine, a first annular step (13) for blocking the second impeller (5) is arranged inside the volute main body (1), and a second annular step (14) for blocking the guide impeller (4) is arranged inside the volute main body (1).

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