CN209908771U - Multistage centrifugal pump - Google Patents
Multistage centrifugal pump Download PDFInfo
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- CN209908771U CN209908771U CN201920723740.6U CN201920723740U CN209908771U CN 209908771 U CN209908771 U CN 209908771U CN 201920723740 U CN201920723740 U CN 201920723740U CN 209908771 U CN209908771 U CN 209908771U
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Abstract
The utility model discloses a multistage centrifugal pump, which comprises a first pump body, a second pump body, an intermediate body, an external connecting pipe and a power shaft, wherein the first pump body and the second pump body have the same structure and are symmetrically arranged, at least two stages of impellers are arranged inside the first pump body along the axis, the power shaft is arranged through the impeller axis positions inside the first pump body and the second pump body, the impellers inside the first pump body and the second pump body are respectively matched and installed with the power shaft, the multistage centrifugal pump adopts two sets of symmetrically installed pump bodies, the axial forces exerted on the power shaft by the impellers inside the two sets of pump bodies are opposite in direction and mutually offset, the abrasion of installation seats at two ends of the power shaft is reduced, the internal sealing degree is ensured, meanwhile, the flow channel of fluid is changed through an electromagnetic valve inside, thereby the impeller quantity of the actual action is changed, the function change of large flow and large lift is realized, the reduction of the sealing degree caused by the disassembly of the pump body is avoided.
Description
Technical Field
The utility model relates to a centrifugal pump technical field specifically is a multistage centrifugal pump.
Background
The centrifugal pump is a pump for conveying liquid by means of centrifugal force generated when an impeller rotates, more than two centrifugal pumps with the same function are integrated in the multistage centrifugal pump, a fluid channel structure is represented in that a medium pressure relief opening of a first stage is communicated with an inlet of a second stage, a medium pressure relief opening of the second stage is communicated with an inlet of a third stage, the multistage centrifugal pump is formed by the mechanism connected in series, the pump head of the multistage centrifugal pump can meet different requirements by changing the pump stages (namely changing the number of impellers), and therefore the multistage centrifugal pump is wide in application range.
However, the multistage centrifugal pump on the existing market has the power shaft axial atress serious, causes the internal balance dish to wear with higher speed, reduces the leakproofness of the pump body, causes the lift to descend, simultaneously at the course of the work, if need change the lift of multistage centrifugal pump, need dismantle the pump body, changes through the mode that increases the impeller, dismantles many times and can cause the leakproofness of the pump body to descend, can cause the loss to the lift of centrifugal pump equally.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome current defect, a multistage centrifugal pump is provided, adopt the pump body of two sets of symmetric installations, the axial force opposite direction on the power shaft is applyed to the inside impeller of two sets of pump bodies, offset each other, reduce the wearing and tearing of power shaft both ends mount pad, guarantee the inside seal degree, inside flow channel who changes the fluid through the solenoid valve simultaneously, thereby change the impeller quantity of actual action, realize the function change of large-traffic and large lift, avoid dismantling the seal degree decline that the pump body caused, can effectively solve the problem in the background art.
In order to achieve the above object, the utility model provides a following technical scheme: a multistage centrifugal pump comprises a first pump body, a second pump body, an intermediate body, an external connecting pipe and a power shaft, wherein the first pump body and the second pump body are identical in structure and are symmetrically arranged, at least two stages of impellers are arranged in the first pump body along the axis, the power shaft penetrates through the impeller axis in the first pump body and the second pump body, the impellers in the first pump body and the second pump body are respectively installed in a matching manner with the power shaft, the intermediate body which is hollow in the first pump body and is respectively communicated with the first pump body and the second pump body is arranged in the middle of the first pump body and the second pump body, a water outlet communicated with an internal cavity is formed in the side wall of the intermediate body, water inlets communicated with the internal cavity are respectively formed in the side walls of the outer ends of the first pump body and the second pump body, water outlets communicated with the internal cavity are respectively formed in the two ends of the first pump body, the water outlet of the first pump body is communicated with the water inlet of the second pump body through an external connecting pipe, the two water outlets of the first pump body are connected in series with a second electromagnetic valve and a third electromagnetic valve respectively, and the water outlet and the water inlet which are installed on the second electromagnetic valve are located at the same end.
As an optimal technical scheme of the utility model, the body of the first pump body and the second pump body is one end confined cylindrical sleeve, the fixed holding ring that sets up of body inner wall, the holding ring is coaxial with the body, holding ring and impeller interval arrangement, the holding ring is close to the fixed spacer ring that sets up in one side at impeller back, the spacer ring rotates with the impeller to be connected, through the holding ring effect, with spacer ring fixed mounting inside the body of the first pump body and the second pump body, through setting up the spacer ring, separate each impeller and be in different cavities, reduce the interact among the different impeller working processes.
As a preferred technical scheme of the utility model, the both ends of midbody set up respectively with the water hole of crossing of first pump body and second pump body intercommunication, and with the first solenoid valve of the water hole inside cooperation installation of crossing of first pump body intercommunication, through the effect of first solenoid valve, open or closed first pump body and midbody between cross the water hole to realize the passageway that inside medium flows.
As a preferred technical scheme of the utility model, the installation opposite direction of the inside impeller of the first pump body and the second pump body is through the change of impeller installation direction to change the axial force that the impeller was used in the power shaft, thereby make the axial force of both sides offset each other, reduce the axial atress of power shaft both ends mount pad, reduce equipment internal wear.
As a preferred technical scheme of the utility model, the through-hole that intermediate body jackshaft position set up and inside isolation, the power shaft rotates the installation through the bearing pair in proper order with the through-hole of the inside spacer ring of the first pump body, intermediate body and the inside spacer ring of the second pump body, set up mechanical seal between the through-hole of power shaft and the first pump body and second pump body tip, through inside spacer ring effect, play the supporting role to the power shaft, guarantee the gyration precision of power shaft and impeller in the course of the work, the mechanical seal at power shaft both ends helps promoting the degree of seal of axle head simultaneously.
Compared with the prior art, the beneficial effects of the utility model are that: this multistage centrifugal pump adopts the pump body of two sets of symmetry installations, and the axial force opposite direction on the power shaft is applyed to the inside impeller of two sets of pump bodies, offsets each other, reduces the atress wearing and tearing of power shaft both ends mount pad, promotes inside leakproofness, and inside change fluidic flow channel through the solenoid valve simultaneously to change the impeller quantity of actual action, realize the function change of large-traffic and large-lift, avoid dismantling the leakproofness decline that the pump body caused.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a sectional view of the present invention.
In the figure: the device comprises a first pump body 1, a water inlet 101, an impeller 102, a positioning ring 103, a separating ring 104, a second pump body 2, a middle body 3, a water outlet 301, a water through hole 302, a first electromagnetic valve 303, an external connecting pipe 4, a second electromagnetic valve 401, a third electromagnetic valve 402 and a power shaft 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a multistage centrifugal pump comprises a first pump body 1, a second pump body 2, an intermediate body 3, an external connecting pipe 4 and a power shaft 5, wherein the first pump body 1 and the second pump body 2 are identical in structure, the first pump body 1 and the second pump body 2 are symmetrically arranged, at least two stages of impellers 102 are arranged in the first pump body 1 along the axis, the power shaft 5 penetrates through the axial positions of the impellers 102 in the first pump body 1 and the second pump body 2, the impellers 102 in the first pump body 1 and the second pump body 2 are respectively matched and installed with the power shaft 5, the intermediate body 3 which is hollow inside and is respectively communicated with the first pump body 1 and the second pump body 2 is arranged between the first pump body 1 and the second pump body 2, a water outlet 301 communicated with an internal cavity is formed in the side wall of the intermediate body 3, a water inlet 101 communicated with the internal cavity is respectively formed in the side wall of the outer end of the first pump body 1 and the outer end of the second pump body 2, water outlets communicated with the internal cavity are, the water outlet of the first pump body 1 is communicated with the water inlet 101 of the second pump body 2 through the external connecting pipe 4, the two water outlets of the first pump body 1 are respectively connected in series with the second electromagnetic valve 401 and the third electromagnetic valve 402, and the water outlet and the water inlet 101 mounted on the second electromagnetic valve 401 are located at the same end.
The body of the first pump body 1 and the body of the second pump body 2 are cylindrical sleeves with one closed end, the inner wall of the body is fixedly provided with a positioning ring 103, the positioning ring 103 is coaxial with the body, the positioning ring 103 is arranged at an interval with the impeller 102, one side of the positioning ring 103 close to the back of the impeller 102 is fixedly provided with a separating ring 104, the outer diameter of the separating ring 104 is smaller than the inner diameter of the body, fluid can flow to a next chamber from the outside of the separating ring 104, the separating ring 104 is rotatably connected with the impeller 102, the separating ring 104 is fixedly arranged inside the body of the first pump body 1 and the body of the second pump body 2 through the action of the positioning ring 103, each impeller 102 is separated into different chambers through the arrangement of the separating ring 104, and the.
The both ends of midbody 3 set up respectively with the water hole 302 of crossing of first pump body 1 and the intercommunication of second pump body 2, and with the first pump body 1 intercommunication cross the water hole 302 inside cooperation installation first solenoid valve 303, through the effect of first solenoid valve 303, open or closed first pump body 1 and midbody 3 between cross the water hole 302 to realize the passageway that inside medium flows.
The installation directions of the impellers 102 in the first pump body 1 and the second pump body 2 are opposite, and the axial force of the impellers 102 acting on the power shaft 5 is changed by changing the installation directions of the impellers 102, so that the axial forces on two sides are mutually offset, the axial stress of the installation seats at two ends of the power shaft 5 is reduced, and the internal abrasion of equipment is reduced.
The middle axis position of the intermediate body 3 is provided with a through hole isolated from the inside, the power shaft 5 is rotatably installed with the through holes of the internal separating ring 104 of the first pump body 1, the intermediate body 3 and the internal separating ring 104 of the second pump body 2 in sequence through a bearing pair, mechanical seals are arranged between the power shaft 5 and the through holes at the end parts of the first pump body 1 and the second pump body 2, the power shaft 5 is supported through the action of the internal separating ring 104, the rotation precision of the power shaft 5 and the impeller 102 in the working process is ensured, meanwhile, the mechanical seals at two ends of the power shaft 5 are beneficial to improving the sealing degree of the shaft end.
When in use: the water inlet 101 of the first pump body 1 is communicated with an external water source, the water outlet 301 of the intermediate body 3 is communicated with a water outlet pipe, and the power shaft 5 is connected with an output shaft of an external motor or other power equipment, so that the impeller 102 is driven to rotate along with the power shaft 5.
When large-flow fluid pumping is needed, the first electromagnetic valve 303 and the second electromagnetic valve 401 are opened, the third electromagnetic valve 402 is closed, at this time, the fluid firstly enters the outer end of the first pump body 1 through the water inlet 101, then enters the outer end of the second pump body 2 through the external connecting pipe 4 at the position of the second electromagnetic valve 401, and under the rotating action of the impellers 102 inside the first pump body 1 and the second pump body 2, the fluid is pumped towards the middle, enters the middle body 3, and is then discharged through the water outlet 301.
When fluid is pumped when a large lift is needed, the first electromagnetic valve 303 and the second electromagnetic valve 401 are closed, the third electromagnetic valve 402 is opened, the fluid firstly enters the outer end of the first pump body 1 through the water inlet 101 at the moment, the fluid is pumped to the middle under the rotation action of the impeller 102 in the first pump body 1, then the fluid enters the outer end of the second pump body 2 through the external connecting pipe 4 at the third electromagnetic valve 402, then the fluid is pumped to the middle under the rotation action of the impeller 102 in the second pump body 2, the fluid enters the middle body 3, and then the fluid is discharged through the water outlet 3.
The utility model discloses a pump body of two sets of symmetry installations, the axial force opposite direction on power shaft 5 is applyed to the inside impeller 102 of two sets of pump bodies, offsets each other, reduces the atress wearing and tearing of 5 both ends mount pads of power shaft, promotes inside leakproofness, and the while is inside to change fluidic flow channel through the solenoid valve to change the impeller 102 quantity of actual action, realize the function change of large-traffic and large-lift, avoid dismantling the leakproofness that the pump body caused and descend.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a multistage centrifugal pump, includes first pump body (1), second pump body (2), midbody (3), external pipe (4) and power shaft (5), its characterized in that: the structure of the first pump body (1) is the same as that of the second pump body (2), the first pump body (1) and the second pump body (2) are symmetrically arranged, at least two stages of impellers (102) are arranged inside the first pump body (1) along the axis, the axis positions of the impellers (102) inside the first pump body (1) and the second pump body (2) are provided with power shafts (5) in a penetrating manner, the impellers (102) inside the first pump body (1) and the second pump body (2) are respectively matched and installed with the power shafts (5), an intermediate body (3) which is hollow inside and is respectively communicated with the first pump body (1) and the second pump body (2) is arranged between the first pump body (1) and the second pump body (2), the side wall of the intermediate body (3) is provided with a water outlet (301) communicated with an inner cavity, the outer end side walls of the first pump body (1) and the second pump body (2) are respectively provided with a water inlet (101) communicated with the inner cavity, the two ends of the first pump body (1) are respectively provided with a water outlet communicated with the inner cavity, the water outlet of the first pump body (1) is communicated with a water inlet (101) of the second pump body (2) through an external connecting pipe (4), the two water outlets of the first pump body (1) are respectively connected in series with a second electromagnetic valve (401) and a third electromagnetic valve (402), and the water outlet and the water inlet (101) of the second electromagnetic valve (401) are arranged at the same end.
2. The multistage centrifugal pump of claim 1, wherein: the body of the first pump body (1) and the body of the second pump body (2) are cylindrical sleeves with one closed ends, the inner wall of the body is fixedly provided with a positioning ring (103), the positioning ring (103) is coaxial with the body, the positioning ring (103) and the impeller (102) are arranged at intervals, one side of the positioning ring (103) close to the back of the impeller (102) is fixedly provided with a separation ring (104), and the separation ring (104) is rotatably connected with the impeller (102).
3. The multistage centrifugal pump of claim 1, wherein: the two ends of the intermediate body (3) are respectively provided with a water passing hole (302) communicated with the first pump body (1) and the second pump body (2), and the first electromagnetic valve (303) is installed inside the water passing hole (302) communicated with the first pump body (1) in a matched mode.
4. The multistage centrifugal pump of claim 1, wherein: the installation directions of the impellers (102) in the first pump body (1) and the second pump body (2) are opposite.
5. The multistage centrifugal pump of claim 2, wherein: the middle axis position of the intermediate body (3) is provided with a through hole isolated from the inside, the power shaft (5) is rotatably installed with the through holes of the internal separating ring (104) of the first pump body (1), the intermediate body (3) and the internal separating ring (104) of the second pump body (2) in sequence through a bearing pair, and a mechanical seal is arranged between the power shaft (5) and the through holes at the end parts of the first pump body (1) and the second pump body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920723740.6U CN209908771U (en) | 2019-05-20 | 2019-05-20 | Multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920723740.6U CN209908771U (en) | 2019-05-20 | 2019-05-20 | Multistage centrifugal pump |
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| Publication Number | Publication Date |
|---|---|
| CN209908771U true CN209908771U (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920723740.6U Active CN209908771U (en) | 2019-05-20 | 2019-05-20 | Multistage centrifugal pump |
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| CN (1) | CN209908771U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114763794A (en) * | 2022-01-20 | 2022-07-19 | 郑胜媛 | Novel multistage centrifugal pump |
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2019
- 2019-05-20 CN CN201920723740.6U patent/CN209908771U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114763794A (en) * | 2022-01-20 | 2022-07-19 | 郑胜媛 | Novel multistage centrifugal pump |
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