CN216842237U - Multi-stage middle-open pump shell limiting structure - Google Patents
Multi-stage middle-open pump shell limiting structure Download PDFInfo
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- CN216842237U CN216842237U CN202220217809.XU CN202220217809U CN216842237U CN 216842237 U CN216842237 U CN 216842237U CN 202220217809 U CN202220217809 U CN 202220217809U CN 216842237 U CN216842237 U CN 216842237U
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Abstract
The utility model discloses a multistage middle-open pump shell limit structure, it includes pump case body, pump shaft and stator subassembly, and stator subassembly includes forward stator and reverse stator, all is provided with spacing lug on forward stator and the reverse stator, and the internal draw-in groove that is provided with of inferior valve, spacing lug card are held in the draw-in groove, go up to be provided with limiting plate and stopper on the casing respectively, and the limiting plate is close to one of them forward stator setting, and the stopper is close to one of them reverse stator setting. The utility model discloses a set up the draw-in groove in the lower casing and carry on spacingly to stator assembly's lower half, the cooperation sets up limiting plate and stopper in last casing, carry on spacingly and carry on spacingly to the first half reverse stator assembly that is in the second cavity to the forward stator assembly that is in first cavity respectively, in order to avoid liquid to cause forward stator assembly or reverse stator assembly to deform to the effort that positive stator assembly or reverse stator assembly applyed when flowing in the pump chamber, reduce the friction risk between impeller subassembly and the stator assembly, and then improve product life.
Description
Technical Field
The utility model belongs to the technical field of the centrifugal pump technique and specifically relates to a pump casing limit structure opens in multistage.
Background
The multistage impeller is installed in the middle of the pump shaft in the existing multistage pump, each impeller is provided with a guide vane for drainage, two ends of the pump shaft are supported by bearings and are arranged in bearing seats, shaft seal devices are symmetrically arranged at the first section and the tail section of the pump shaft extending parts of the pump, because the impellers are arranged on the pump shaft, each stage of impeller can do work for liquid after rotating, so that the energy of the impeller is increased, the water pressure of a first-stage water suction chamber is lower than that of a rear-stage water inlet chamber, the acting force caused by the water pressure difference can exert force on the guide vanes, further, the guide vanes can be deformed, the impeller and the guide vanes are enabled to be attached more tightly, and the service life of a product is influenced.
Therefore, it is desirable to provide a limiting structure of a multi-stage pump-in-casing to solve the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
Based on this, it is necessary to provide a multistage middle open pump shell limit structure for avoiding the guide vane from generating deformation, and reduce the friction risk between the impeller and the guide vane assembly, aiming at the defects of the prior art.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a multi-stage middle-open pump shell limiting structure comprises a pump shell body, a pump shaft, a forward guide vane assembly and a reverse guide vane assembly, wherein the pump shell body is formed by assembling an upper shell and a lower shell, a pump cavity is formed by enclosing the upper shell and the lower shell, and the pump shaft is arranged in the pump cavity; the pump shaft is provided with a forward impeller and a reverse impeller, the forward guide vane component is sleeved at the outer side part of the forward impeller, and the reverse guide vane component is sleeved at the outer side part of the reverse impeller;
an upper baffle plate is arranged in the upper shell, a lower baffle plate is arranged in the lower shell, the upper baffle plate and the lower baffle plate are arranged in a butt joint mode so as to divide a pump cavity into a first cavity and a second cavity, the pump shaft penetrates through the upper baffle plate and the lower baffle plate, the forward impeller is arranged in the first cavity, and the reverse impeller is arranged in the second cavity;
all be provided with spacing lug on forward stator subassembly and the reverse stator subassembly, the internal draw-in groove that is provided with of inferior valve, spacing lug card is held in the draw-in groove, upward be provided with limiting plate and stopper on the casing respectively, the limiting plate is close to one of them forward stator subassembly setting, the stopper is close to one of them reverse stator subassembly setting.
In one embodiment, the limiting lug is arranged on the lower half parts of the forward guide vane assembly and the reverse guide vane assembly.
In one of them embodiment, forward stator subassembly and reverse stator subassembly all include stator body and baffle, spacing lug is formed by baffle week side outside extension, stator body and baffle butt joint setting, forward impeller and reverse impeller correspond respectively to set up in stator body and baffle enclose the space that establishes and form.
In one embodiment, the upper shell is provided with a water outlet port and a water inlet port, and the water outlet port and the water inlet port are connected together through a connecting pipe.
In one embodiment, the plurality of forward guide vane assemblies are sequentially arranged in parallel in the first cavity, the first cavity is sequentially divided into a first-stage water suction chamber, a plurality of first transition flow channels and a middle flow channel by the forward guide vane assemblies, the reverse guide vane assemblies are sequentially arranged in the second cavity in parallel, the second cavity is sequentially divided into a second-stage water suction chamber, at least one second transition flow channel and a water outlet flow channel by the reverse guide vane assemblies, a water suction port and a water outlet port are formed in the lower shell, the water suction port is communicated with the first-stage water suction chamber, the water outlet port is communicated with the water outlet flow channel, the water outlet port is communicated with the middle flow channel, and the water inlet port is communicated with the second-stage water suction chamber.
In one embodiment, the limiting plate is arranged in the primary water absorption chamber, and the limiting block is arranged in the secondary water absorption chamber.
In one embodiment, the axial clearance between the limiting plate and one of the forward guide vane assemblies is 2-3mm, and the axial clearance between the limiting block and one of the reverse guide vane assemblies is 2-3 mm.
In one embodiment, bearing portions are respectively arranged at two end portions of the lower shell, and two ends of the pump shaft are clamped in the bearing portions.
In one embodiment, an upper ring column is arranged in the middle of the upper partition plate, a lower ring column is arranged in the middle of the lower partition plate, the upper ring column is in butt joint with the lower ring column, a supporting ring groove is formed by surrounding the upper ring column and the lower ring column, and the pump shaft penetrates through the supporting ring groove.
In one embodiment, the pump casing body is assembled by an upper casing and a lower casing which are horizontally opened.
To sum up, the utility model relates to a multistage middle-open pump shell limit structure carries on spacingly through set up the draw-in groove in the lower casing to stator assembly's lower half, the cooperation sets up limiting plate and stopper in last casing to carry on spacingly and spacing the reverse stator assembly that is in the second cavity first to being in the forward stator assembly in the first cavity respectively, in order to avoid liquid to cause forward stator assembly or reverse stator assembly to deform to the effort that forward stator assembly or reverse stator assembly applyed when flowing in the pump chamber, reduce the friction risk between impeller assembly and the stator assembly, and then improve product life.
Drawings
Fig. 1 is a schematic structural view of a limiting structure of a multistage pump casing of the present invention;
fig. 2 is a schematic structural view of the multi-stage axially split pump casing limiting structure after the upper casing is hidden;
FIG. 3 is a sectional view of the multi-stage axially split pump housing of the present invention;
fig. 4 is a schematic structural view of the upper housing of the present invention;
fig. 5 is a schematic structural view of the lower housing of the present invention;
FIG. 6 is a schematic view of the pump shaft and bearing portion of the present invention;
fig. 7 is an exploded view of one of the forward vane assemblies of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 7, the multi-stage axially split pump casing limiting structure of the present invention includes a pump casing body 100, a pump shaft 200, a forward guide vane assembly 310 and a reverse guide vane assembly 320, wherein the pump casing body 100 is assembled by an upper casing 110 and a lower casing 120 horizontally split, the upper casing 110 and the lower casing 120 are surrounded to form a pump cavity 400, the pump shaft 200 is disposed in the pump cavity 400, two ends of the lower casing 120 are respectively provided with a bearing portion 500, and two ends of the pump shaft 200 are clamped in the bearing portions 500; the upper shell 110 is provided with a water outlet port 111 and a water inlet port 112, and the water outlet port 111 and the water inlet port 112 are connected together through a connecting pipe 600; the pump shaft 200 is provided with a forward impeller 210 and a reverse impeller 220, the forward guide vane assembly 310 is sleeved at the outer side of the forward impeller 210, and the forward guide vane assembly 310 is used for guiding the flow of liquid conveyed by the forward impeller 210, so that the forward impeller 210 can rotate conveniently to realize the working effect on the liquid; the reverse guide vane assembly 320 is sleeved at the outer side part of the reverse impeller 220, the reverse guide vane assembly 320 is used for guiding the liquid conveyed by the reverse impeller 220, and further the reverse impeller 220 is convenient to rotate to realize the acting effect on the liquid.
An upper partition plate 113 is arranged in the upper housing 110, a lower partition plate 121 is arranged in the lower housing 120, the upper partition plate 113 and the lower partition plate 121 are in butt joint to divide the pump chamber 400 into a first cavity 410 and a second cavity 420, the pump shaft 200 is arranged to penetrate through the upper partition plate 113 and the lower partition plate 121, the forward impeller 211 is arranged in the first cavity 410, and the reverse impeller 212 is arranged in the second cavity 420.
The forward guide vane assemblies 310 are sequentially arranged in parallel in the first cavity 410, and the first cavity 410 is sequentially divided into a first-stage water suction chamber 411, a plurality of first transition flow channels 412 and a middle flow channel 413 by the forward guide vane assemblies 310 from left to right; it is a plurality of reverse guide vane assembly 320 sets up in second cavity 420 side by side in proper order, and is a plurality of reverse guide vane assembly 320 divides second cavity 420 into secondary suction chamber 421, at least one second transition runner 422 and play water runner 423 from the right side to left side in proper order, water sucking mouth 122 and delivery port 123 have been seted up on the casing 120 down, water sucking mouth 122 and primary suction chamber 411 intercommunication setting, delivery port 123 and play water runner 423 intercommunication setting, delivery port 111 and middle runner 413 intercommunication setting, inlet port 112 and secondary suction chamber 421 intercommunication setting.
The forward guide vane assembly 310 and the reverse guide vane assembly 320 are both provided with a limiting lug 301, and specifically, the limiting lug 301 is arranged at the lower half part of the forward guide vane assembly 310 and the reverse guide vane assembly 320; a clamping groove 124 is formed in the lower shell 120, and the limiting projection 301 is clamped in the clamping groove 124 to limit the lower half portions of the forward guide vane assembly 310 and the reverse guide vane assembly 320; the upper shell 110 is provided with a limiting plate 114 in the primary water suction chamber 411, the limiting plate 114 is arranged close to one of the forward guide vane assemblies 310, the upper shell 110 is provided with a limiting block 115 in the secondary water suction chamber 421, and the limiting block 115 is arranged close to one of the reverse guide vane assemblies 320; when the pump shaft 200 rotates to drive the forward impeller 210 to start rotating, external liquid enters the first-stage water suction chamber 411 through the water suction port 122, the flow rate of the liquid is gradually increased along with the rotation of the forward impeller 210, so that the pressure of the liquid in the middle flow passage 413 on the forward guide vane assembly 310 is greater than the pressure of the liquid in the first-stage water suction chamber 411 on the forward guide vane assembly 310, the forward guide vane assembly 310 in the first cavity 410 is subjected to a leftward acting force, because the lower half part of the forward guide vane assembly 310 is pressed against the clamping groove 124, and the upper half part of the forward guide vane assembly 310 is pressed against the limiting plate 114, the acting force applied by the liquid on the forward guide vane assembly 310 is offset, the deformation of the forward guide vane assembly 310 due to the liquid pressure is effectively avoided, the friction risk between the forward impeller 210 and the forward guide vane assembly 310 is reduced, and the service life of the product is further prolonged.
The liquid in the middle flow passage 413 enters the secondary water suction chamber 421 through the connecting pipe 600, and the flow rate of the liquid is gradually increased along with the rotation of the reverse impeller 220, so that the pressure of the liquid in the water outlet flow passage 423 to the reverse guide vane assembly 320 is greater than the pressure of the liquid in the secondary water suction chamber 421 to the reverse guide vane assembly 320, the reverse guide vane assembly 320 in the second cavity 420 is subjected to a rightward acting force, because the lower half part of the reverse guide vane assembly 320 is pressed against the clamping groove 124, and the upper half part of the reverse guide vane assembly 320 is pressed against the limiting block 115, the acting force of the liquid to the reverse guide vane assembly 320 is offset, the deformation of the reverse guide vane assembly 320 caused by the liquid pressure is effectively avoided, the friction risk between the reverse impeller 220 and the reverse guide vane assembly 320 is reduced, and the service life of a product is further prolonged.
In one embodiment, the axial clearance between the limiting plate 114 and the forward guide vane assembly 310 is 2-3mm, and the upper half portion of the forward guide vane assembly 310 abuts against the limiting plate 114, so that deformation of the forward guide vane assembly 310 caused by liquid pressure is effectively avoided, and the friction risk between the forward impeller 210 and the forward guide vane assembly 310 is reduced; the axial clearance between the limiting block 115 and the reverse guide vane assembly 320 is 2-3mm, the upper half part of the reverse guide vane assembly 320 is pressed on the limiting block 115, deformation of the reverse guide vane assembly 320 caused by liquid pressure is effectively avoided, and the friction risk between the reverse impeller 220 and the reverse guide vane assembly 320 is reduced.
In one embodiment, the forward guide vane assembly 310 and the reverse guide vane assembly 320 both include a guide vane body 302 and a partition 303, the limiting protrusion 301 is formed by extending the partition 303 circumferentially outward, the guide vane body 302 is in butt joint with the partition 303, and the forward impeller 210 and the reverse impeller 220 are respectively disposed in a space defined by the guide vane body 302 and the partition 303.
In one embodiment, the upper partition 113 is provided with an upper ring column 116 in the middle, the lower partition 121 is provided with a lower ring column 125 in the middle, the upper ring column 116 is in butt joint with the lower ring column 125, the upper ring column 116 and the lower ring column 125 enclose to form a supporting ring groove 101, and the pump shaft 200 is disposed through the supporting ring groove 101.
In this embodiment, the forward impeller 210 and the backward impeller 220 are conventional centrifugal impellers, and are mounted on the pump shaft 200 by a snap-fit manner to rotate together with the pump shaft 200, and the forward impeller 210 and the backward impeller 220 are reversely assembled on the pump shaft 200, so that the axial force borne by the pump shaft 200 maintains a balanced state as much as possible.
The utility model discloses during operation specifically, external drive device drives pump shaft 200 and rotates, pump shaft 200 rotates and drives forward impeller 210 and reverse impeller 220 and rotate in step, outside liquid enters into primary water absorption chamber 411 from water sucking mouth 122, rotate through forward impeller 210 and do work to liquid, make its energy increase, the liquid that enters into primary water absorption chamber 411 enters into middle runner 413 after looping through a plurality of first transition runners 412, reuse connecting pipe 600 carries the liquid in middle runner 413 to secondary water absorption chamber 421, rethread reverse impeller 220 rotates and continues to do work to liquid, further make its energy increase, the liquid that enters into secondary water absorption chamber 421 enters into outlet flow channel 423 after looping through at least one second transition runner 422, finally send out liquid from delivery port 123 continuously; when liquid flows in the pump chamber 400, the pressure of the liquid in the middle flow passage 413 on the forward guide vane assembly 310 is greater than the pressure of the liquid in the first-stage water suction chamber 411 on the forward guide vane 310, so that the forward guide vane assembly 310 in the first cavity 410 is subjected to a leftward acting force, the lower half part of the forward guide vane assembly 310 is pressed in the clamping groove 124, and the upper half part of the forward guide vane 310 is pressed on the limiting plate 114, so that the acting force of the liquid on the forward guide vane 310 is offset, the deformation of the forward guide vane assembly 310 caused by the liquid pressure is effectively avoided, the friction risk between the forward impeller 210 and the guide vane assembly is reduced, and the service life of a product is prolonged; meanwhile, the pressure of the liquid in the water outlet flow channel 423 to the reverse guide vane assembly 320 is greater than the pressure of the liquid in the secondary water suction chamber 421 to the reverse guide vane assembly 320, so that the reverse guide vane assembly 320 in the second cavity 420 is subjected to a rightward acting force, because the lower half part of the reverse guide vane assembly 320 is pressed in the clamping groove 124, and the upper half part of the reverse guide vane assembly 320 is pressed on the limiting block 115, thereby counteracting the acting force applied by the liquid to the reverse guide vane assembly 320, effectively avoiding the deformation of the reverse guide vane assembly 320 caused by the liquid pressure, reducing the friction risk between the reverse impeller 220 and the guide vane assembly, and further improving the service life of the product.
To sum up, the utility model relates to a multistage middle-open pump shell limit structure is spacing to stator assembly's lower half through set up draw-in groove 124 in casing 120 down, the cooperation sets up limiting plate 114 and stopper 115 in last casing 110, carry on spacingly and carry on spacingly to the reverse stator assembly 320 that is in second cavity 420 first half to the forward stator assembly 310 that is in first cavity 410 respectively, in order to avoid liquid to cause forward stator assembly 310 or reverse stator assembly 320 to the effort of applying when flowing in pump chamber 400 and reverse stator assembly 320 deformation, reduce the friction risk between impeller assembly 210 and the stator assembly 300, and then improve product life.
The above-described embodiments are merely illustrative of several embodiments of the present invention, which are described in detail and specific, but not intended to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The utility model provides a pump case limit structure in multistage, its characterized in that: the pump casing body is formed by assembling an upper casing and a lower casing, a pump cavity is formed by enclosing the upper casing and the lower casing, and the pump shaft is arranged in the pump cavity; the pump shaft is provided with a forward impeller and a reverse impeller, the forward guide vane component is sleeved at the outer side part of the forward impeller, and the reverse guide vane component is sleeved at the outer side part of the reverse impeller;
an upper baffle plate is arranged in the upper shell, a lower baffle plate is arranged in the lower shell, the upper baffle plate and the lower baffle plate are arranged in a butt joint mode so as to divide a pump cavity into a first cavity and a second cavity, the pump shaft penetrates through the upper baffle plate and the lower baffle plate, the forward impeller is arranged in the first cavity, and the reverse impeller is arranged in the second cavity;
all be provided with spacing lug on forward stator subassembly and the reverse stator subassembly, the internal draw-in groove that is provided with of inferior valve, spacing lug card is held in the draw-in groove, upward be provided with limiting plate and stopper on the casing respectively, the limiting plate is close to one of them forward stator subassembly setting, the stopper is close to one of them reverse stator subassembly setting.
2. The multi-stage pump-in-pump housing limiting structure of claim 1, wherein: the limiting lug is arranged on the lower half parts of the forward guide vane assembly and the reverse guide vane assembly.
3. The multi-stage pump-in-pump housing limit structure of claim 1 or 2, wherein: forward stator subassembly and reverse stator subassembly all include stator body and baffle, spacing lug is formed by outside extension in baffle week side, stator body and baffle butt joint set up, forward impeller and reverse impeller correspond respectively to set up in stator body and baffle enclose the space of establishing and forming.
4. The multi-stage pump-in-pump housing limit structure of claim 1 or 2, wherein: the upper shell is provided with a water outlet port and a water inlet port, and the water outlet port is connected with the water inlet port through a connecting pipe.
5. The multi-stage pump-in-pump housing limiting structure of claim 4, wherein: it is a plurality of forward stator subassembly sets up side by side in proper order in first cavity, and is a plurality of forward stator subassembly is cut apart into first order water absorption chamber, a plurality of first transition runner and middle runner with first cavity in proper order, and is a plurality of reverse stator subassembly sets up side by side in the second cavity in proper order, and is a plurality of reverse stator subassembly is cut apart into secondary water absorption chamber, at least one second transition runner and water outlet runner with the second cavity in proper order, water sucking mouth and delivery port have been seted up on the casing down, water sucking mouth and first order water absorption chamber intercommunication set up, the delivery port sets up with water outlet runner intercommunication, water outlet port and middle runner intercommunication set up, water inlet port and secondary water absorption chamber intercommunication set up.
6. The multi-stage pump-in-pump housing limiting structure of claim 5, wherein: the limiting plate is arranged in the primary water absorption chamber, and the limiting block is arranged in the secondary water absorption chamber.
7. The multi-stage pump-in-pump housing limit structure of claim 1 or 2, wherein: the axial clearance between the limiting plate and one of the forward guide vane assemblies is 2-3mm, and the axial clearance between the limiting block and one of the reverse guide vane assemblies is 2-3 mm.
8. The multi-stage pump-in-pump housing limit structure of claim 1 or 2, wherein: bearing parts are respectively arranged at two ends of the lower shell, and two ends of the pump shaft are clamped in the bearing parts.
9. The multi-stage pump-in-pump housing limit structure of claim 1 or 2, wherein: go up the baffle middle part and be provided with the ring post, the baffle middle part is provided with down the ring post down, go up the ring post and set up with ring post butt joint down, go up the ring post and enclose with lower ring post and establish and form the support annular, the pump shaft runs through the setting of support annular.
10. The multi-stage pump-in-pump housing limit structure of claim 1 or 2, wherein: the pump shell body is formed by assembling an upper shell and a lower shell which are horizontally opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220217809.XU CN216842237U (en) | 2022-01-26 | 2022-01-26 | Multi-stage middle-open pump shell limiting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220217809.XU CN216842237U (en) | 2022-01-26 | 2022-01-26 | Multi-stage middle-open pump shell limiting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216842237U true CN216842237U (en) | 2022-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220217809.XU Active CN216842237U (en) | 2022-01-26 | 2022-01-26 | Multi-stage middle-open pump shell limiting structure |
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| Country | Link |
|---|---|
| CN (1) | CN216842237U (en) |
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- 2022-01-26 CN CN202220217809.XU patent/CN216842237U/en active Active
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