CN212803715U - Centrifugal pump choma seal structure - Google Patents
Centrifugal pump choma seal structure Download PDFInfo
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- CN212803715U CN212803715U CN202021880510.XU CN202021880510U CN212803715U CN 212803715 U CN212803715 U CN 212803715U CN 202021880510 U CN202021880510 U CN 202021880510U CN 212803715 U CN212803715 U CN 212803715U
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- impeller
- ring
- mouth ring
- choma
- water inlet
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Abstract
The utility model discloses a centrifugal pump mouth ring sealing structure, which comprises an impeller arranged in an impeller shell, wherein the lower end of the impeller is provided with a water inlet part, and the outer side surface of the water inlet part is arranged opposite to the inner side surface of the impeller shell; the choma, through choma seat activity setting be in intake portion with between the medial surface of impeller shell, including the choma body, set up a plurality of two-way anti-rotation supporting legss along radial equidistance on the outer periphery of choma body. The utility model has the advantages that the mouth ring is movably arranged between the water inlet part and the impeller shell through the mouth ring seat, the position of the mouth ring can be adjusted according to the eccentricity and swing condition of the impeller, the mouth ring gap is reduced, and the mouth ring is prevented from being worn; the outer diameter surface of the mouth ring body is provided with a plurality of bidirectional anti-rotation supporting legs along the radial direction at equal intervals, so that the limiting is provided when the water pump is started, and the mouth ring is prevented from being damaged due to the fact that the impeller rotates reversely when the water pump is suddenly started or stopped.
Description
Technical Field
The utility model relates to a centrifugal pump seals technical field, concretely relates to centrifugal pump choma seal structure.
Background
The mining self-balancing multistage pump opening ring generally refers to an impeller opening ring, is annular metal installed between a water pump impeller and a pump body, is also called a sealing ring or a wear-resisting ring, and mainly has the main function of preventing a medium at an outlet end from flowing back to the inlet end, namely the sealing function; meanwhile, the impeller also has a wear-resistant effect, avoids direct contact and damage of the impeller and the impeller shell, and has the function of protecting the impeller. The mining self-balancing multistage pump opening ring increases the flow resistance of a medium mainly by forming a narrow and tortuous channel between an impeller and an impeller shell, and achieves the purpose of reducing medium leakage. The arrangement of the mining multistage pump orifice ring also plays a role in protecting main parts on the pump from abrasion, and after the orifice ring is abraded, the orifice ring can be repaired or replaced by a new ring, and a normal assembly gap is recovered. The utility model discloses a pump, including the impeller, the impeller is including the impeller, the.
Therefore, the chinese utility model patent CN20408256U provides a multistage impeller mechanism assembly of submersible pump, including the impeller mechanism more than a set of, wherein every group impeller includes impeller and flow guide plate, the impeller water inlet of last one-level impeller mechanism all extends into the flow guide plate outlet hole of next one-level impeller mechanism, the movable sleeve is equipped with the seal ring on the impeller water inlet, its clearance is 0.02-3mm, the seal ring is located the flow guide plate top of next one-level impeller mechanism, and when the pump drew water, every seal ring was hugged closely with corresponding flow guide plate all the time because of the pressure differential effect. The utility model discloses a, inlay on the guiding disk and establish the metal framework that is cyclic annular distribution, the seal mouth ring sets up in metal framework's top, has improved the supporting strength of guiding disk to the sealing ring to a certain extent, has alleviated the long-time produced plastic deformation of using of sealing ring and the concave condition in part, has improved the leakproofness of sealing ring to a certain extent.
However, the above solution has the following disadvantages:
(1) the sealing ring is sleeved on the water inlet of the impeller, and the sealing ring still loses the tightness due to abrasion along with the long-time use of the submersible pump, so that the use function efficiency of the pump is influenced;
(2) at the moment of starting the pump, the flow rate in the pump is increased, and the mouth ring is easy to damage.
In view of this, it is urgently needed to improve the existing orifice ring sealing structure so as to improve the wear resistance of the sealing orifice ring structure and prevent the orifice ring from being damaged due to the increase of flow rate at the moment of starting the pump.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that current choma seal structure wear resistance is poor, lead to the problem that the choma damaged because of opening the pump increase of flow in the twinkling of an eye easily.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts as follows:
a centrifugal pump orifice ring seal structure comprising:
the impeller is arranged in the impeller shell, the lower end of the impeller is provided with a water inlet part, and the outer side surface of the water inlet part is opposite to the inner side surface of the impeller shell;
the mouth ring is movably arranged between the outer side face of the water inlet part and the inner side face of the impeller shell through the mouth ring seat and comprises a mouth ring body, and a plurality of bidirectional anti-rotation supporting legs are arranged on the outer diameter face of the mouth ring body along the radial direction at equal intervals.
In the scheme, a stainless steel impeller sheath is sleeved on the outer side surface of the water inlet part, and the inner side surface of the mouth ring body is matched and sealed with the outer side surface of the stainless steel impeller sheath.
In the scheme, the inner diameter of the mouth ring is 0.05-1mm larger than the outer diameter of the stainless steel impeller sheath.
In the scheme, the mouth ring seat is an annular seat, the inner side surface and the outer side surface of the annular seat are respectively matched with the outer side surface of the water inlet part and the inner side surface of the impeller shell, a groove is formed in the top surface of the annular seat, and the shape of the groove is matched with that of the outer side surface of the mouth ring; the depth of the groove is greater than the thickness of the mouth ring body.
In the scheme, the number of the two-way rotation-proof supporting legs is not less than three.
In the scheme, the two-way anti-rotation supporting legs are in a symmetrical ring sector shape, and the included angle of two sides of the ring sector shape is an acute angle; the thickness of the two-way anti-rotation supporting leg is smaller than that of the mouth ring body.
In the scheme, the size of the groove is 0.5-1mm larger than that of the outer side surface of the mouth ring.
In the scheme, the mouth ring is formed by injection molding of a wear-resistant elastic material, and the Shore hardness of the mouth ring is 70-95 degrees.
In the scheme, an annular groove is formed in one side, close to the inner side face, of the bottom face of the mouth ring body.
In the scheme, the top surface of the collar seat is provided with steps, the impeller shell is matched with the steps, and the inner wall of the impeller shell is in double-channel radial small-gap fit with the steps.
Compared with the prior art, the mouth ring of the centrifugal pump sealing structure provided by the utility model is movably arranged between the water inlet part and the impeller shell through the mouth ring seat, so that the position of the mouth ring can be adjusted according to the eccentricity and swing condition of the impeller, the mouth ring gap is reduced, and the mouth ring is prevented from being worn; the outer diameter surface of the mouth ring body is provided with a plurality of bidirectional anti-rotation supporting legs along the radial direction at equal intervals, so that the limiting is provided when the water pump is started, and the mouth ring is prevented from being damaged due to the fact that the impeller rotates reversely when the water pump is suddenly started or stopped.
Drawings
FIG. 1 is a structural exploded view of the middle split ring seal structure of the present invention;
fig. 2 is a cross-sectional view of the sealing structure of the middle orifice ring of the present invention.
Wherein, the corresponding relationship between each reference number and the part name in fig. 1 to 2 is as follows:
the impeller comprises an impeller shell 1, an impeller 2, a ring 3, a ring seat 4, a water inlet part 21, a ring body 30, a bidirectional rotation-proof supporting leg 31, an annular groove 32, an annular groove 41, a ring body groove 411, a supporting leg groove 412, a step 42 and a stainless steel impeller sheath 22.
Detailed Description
The utility model provides a centrifugal pump mouth ring sealing structure, wherein a mouth ring is movably arranged between a water inlet part and an impeller shell through a mouth ring seat, the position of the mouth ring can be adjusted according to the eccentricity and swing condition of an impeller, the mouth ring gap is reduced, and the mouth ring is prevented from being worn; the outer diameter surface of the mouth ring body is provided with a plurality of bidirectional anti-rotation supporting legs along the radial direction at equal intervals, so that the limiting is provided when the water pump is started, and the mouth ring is prevented from being damaged due to the fact that the impeller rotates reversely when the water pump is suddenly started or stopped. The invention is described in detail below with reference to the drawings and the detailed description.
As shown in fig. 1 and 2, the utility model provides a centrifugal pump choma seal structure includes impeller shell 1, impeller 2 and choma 3, and impeller 2 sets up in impeller shell 1, and impeller 2's the portion of intaking 21 sets up with the medial surface of impeller shell 1 relatively, and choma 3 sets up between portion of intaking 21 and impeller shell 1 through the activity of choma seat 4.
The mouth ring 3 comprises a mouth ring body 30, the mouth ring body 30 is an annular sealing ring, a plurality of bidirectional anti-rotation supporting feet 31 are arranged on the outer diameter surface of the mouth ring body along the radial direction at equal intervals, the bidirectional anti-rotation supporting feet 31 are in a symmetrical ring sector shape, and the included angle of two sides of the ring sector shape is an acute angle. The thickness of the two-way rotation-proof supporting leg 31 is smaller than that of the mouth ring body 30. An annular groove 32 is formed on the bottom surface of the mouth ring 3 on the side close to the inner side surface. The mouth ring 3 is formed by injection molding of wear-resistant elastic materials, and the Shore hardness of the mouth ring is 70-95 degrees.
The mouth ring seat 4 is an annular seat arranged between the water inlet part 21 and the impeller shell 1, the shape of the inner side surface of the annular seat is matched with the shape of the outer side surface of the water inlet part 21, and the shape of the outer side surface of the annular seat is matched with the shape of the inner side surface of the impeller shell. The top surface of the mouth ring seat 4 is provided with a mouth ring groove 41, the shape of which is matched with the shape of the outer side surface of the mouth ring 3, and the depth of which is greater than the thickness of the mouth ring body 30. The mouth ring groove 41 comprises a mouth ring body groove 411 and a supporting leg groove 412, the mouth ring body groove 411 is communicated with the supporting leg groove 412, and the diameter of the mouth ring body groove 411 is 0.5-1mm larger than the outer diameter of the mouth ring body 30. The supporting leg slot 412 is a ring sector matched with the shape of the two-way rotation-proof supporting leg 31, the sector of the supporting leg slot 412 is 0.5-1mm wider than the two-way rotation-proof supporting leg 31, and the mouth ring 3 can rotate clockwise or anticlockwise in the mouth ring seat 4. The top surface of the collar seat 4 is provided with a step 42, the inner wall of the impeller shell 1 is matched with the step 42, and the inner wall of the impeller shell 1 is in double-channel radial small clearance fit with the step 42.
The bottom of the water inlet part 21 is sleeved with a stainless steel impeller sheath 22, the outer diameter of the stainless steel impeller sheath 22 is 0.05-1mm smaller than the inner diameter of the mouth ring body 30, and the outer side surface of the stainless steel impeller sheath 22 is matched with the inner side surface of the mouth ring body 30 to realize sealing.
The working process of the utility model is as follows:
when the impeller 2 rotates along with the pump shaft to pressurize, water flow enters from the water inlet 21 of the impeller 2, rotates along with the impeller 2 to pressurize, and flows out from the pressure relief port of the impeller 2. Because the pressure of the liquid before and after the cover plate of the impeller 2 is unbalanced, an axial force pointing to the water inlet 21 is generated on the impeller 2, and the impeller 2 swings or is eccentric under the action of the axial force, so that the gap between the opening ring 3 and the water inlet part 21 is increased, and the sealing performance of the opening ring 3 is reduced. The mouth ring 3 can move in the mouth ring groove 41, and the position and the posture of the mouth ring 3 in the mouth ring groove 41 can be adjusted according to the swinging or the eccentricity of the impeller 2, so that the mouth ring gap is reduced, and the sealing performance of the mouth ring 3 is maintained.
In the process of rotating and pressurizing the impeller 2, the mouth ring 3 is tightly attached to the mouth ring groove 41 under the action of interstage pressure, the bottom surface of the mouth ring 3 is provided with the ring groove 32, the mouth ring is deformed under the action of the interstage pressure, the inside of the mouth ring extends inwards in the radial direction, and the effect of improving the sealing performance can be achieved.
When the pump is suddenly started or the water flow is suddenly increased, the bidirectional prevention supporting leg 31 is limited by the supporting leg groove 412 and does not rotate along with the impeller 2; when the impeller 2 rotates reversely due to water hammer caused by sudden stop of the pump or sudden reduction of water flow, the bidirectional supporting leg 31 is limited by the supporting leg groove 412, so that the impeller 2 is prevented from rotating reversely to wear the mouth ring 3. When the pump is started initially, the orifice ring 3 can float along the axial direction along with the impact of water flow in the orifice ring groove 41, so that the pump has low starting resistance and good starting performance.
Compared with the prior art, the utility model provides a centrifugal pump choma seal structure, choma pass through choma seat activity and set up between water inlet portion and impeller shell of impeller lower extreme, can adjust the position of choma along with the eccentricity and swing of impeller, reduce choma clearance, less leakage of medium in the pump, in order to provide the service function efficiency of centrifugal pump; meanwhile, the opening ring is movably arranged between the water inlet part and the impeller shell, so that abrasion between the opening ring and the water inlet part can be avoided.
In the utility model, the mouth ring comprises a mouth ring body, a plurality of bidirectional rotation-proof supporting legs are uniformly distributed on the mouth ring body along the radial direction at equal intervals, so that the mouth ring is limited when the water pump is started or the water flow is increased, the mouth ring is prevented from being worn between the mouth ring and the mouth ring seat, and the service life of the mouth ring is shortened; when the water pump is suddenly stopped or the water flow is suddenly reduced to generate a water hammer phenomenon to cause the impeller to rotate reversely, the opening ring is prevented from rotating reversely along with the impeller, the service life of the opening ring is prolonged, and the starting and stopping performance of the water pump is improved.
In this scheme, the cover is equipped with stainless steel impeller sheath on the lateral surface of portion of intaking, plays the effect that reduces wearing and tearing, has prolonged the life of impeller.
In this scheme, the choma sets up in the choma inslot of choma seat top surface, and the degree of depth of choma groove is greater than the thickness of choma body, has reserved the ascending activity space of axial for the choma, makes things convenient for the choma to adjust its position gesture in the choma inslot according to the skewness or the slope of impeller.
In the scheme, the two-way anti-rotation supporting legs are in a symmetrical ring sector shape, the included angles on the two sides of the two-way anti-rotation supporting legs are acute angles, the thickness of the two-way anti-rotation supporting legs is smaller than that of the mouth ring body, the axial upward friction between the two-way anti-rotation supporting legs and the impeller shell and the mouth ring seat is reduced, and the service life of the mouth ring is prolonged.
In this scheme, be close to one side of medial surface on the bottom surface of choma body and be equipped with the ring channel, when the choma received stage pressure, can take place deformation along the position of ring channel, made the internal diameter of choma body inwards extend, further reduced choma clearance, improved the leakproofness of choma.
In the scheme, the top surface of the collar seat is provided with the steps, the inner wall of the impeller shell is matched with the steps, and the inner wall of the impeller shell is in double-channel radial small clearance fit with the steps, so that the floating characteristic of the impeller is met.
The present invention is not limited to the above-mentioned best mode, and any person should learn the structural change made under the teaching of the present invention, all with the present invention has the same or similar technical solution, all fall into the protection scope of the present invention.
Claims (10)
1. A centrifugal pump orifice ring seal structure, comprising:
the impeller is arranged in the impeller shell, the lower end of the impeller is provided with a water inlet part, and the outer side surface of the water inlet part is opposite to the inner side surface of the impeller shell;
the choma, set up through choma seat activity the lateral surface of portion of intaking with between the medial surface of impeller shell, including the choma body, set up a plurality of two-way anti-rotation supporting legss along radial equidistance on the outer periphery of choma body.
2. The seal structure of claim 1, wherein a stainless steel impeller sheath is sleeved on an outer side surface of the water inlet portion, and an inner side surface of the mouth ring body is in fit sealing with an outer side surface of the stainless steel impeller sheath.
3. The seal arrangement of claim 2, wherein the inner diameter dimension of the mouth ring is 0.05-1mm larger than the outer diameter dimension of the stainless steel impeller sheath.
4. The choma sealing structure of claim 1, wherein the choma seat is an annular seat, the inner side surface and the outer side surface of the annular seat are respectively matched with the outer side surface of the water inlet part and the inner side surface of the impeller shell, the top surface of the annular seat is provided with a groove, and the shape of the groove is matched with the shape of the outer side surface of the choma; the depth of the groove is greater than the thickness of the mouth ring body.
5. The split ring seal structure of claim 1, wherein the number of the two-way anti-rotation support legs is not less than three.
6. The oro-ring sealing structure of claim 1, wherein the two-way rotation-preventing supporting legs are in a symmetrical ring sector shape, and an included angle between two sides of the ring sector shape is an acute angle; the thickness of the two-way anti-rotation supporting leg is smaller than that of the mouth ring body.
7. The lip seal arrangement of claim 4 wherein said groove is sized 0.5-1mm larger than the outer side of said lip ring.
8. The lip ring seal construction of claim 1 wherein said lip ring is injection molded from a wear resistant elastomeric material having a shore hardness of 70-95 degrees.
9. The lip seal arrangement according to claim 1 wherein said lip body has an annular groove in a bottom surface thereof adjacent said inner side surface.
10. The bellmouth sealing structure according to claim 1, characterized in that the top surface of the bellmouth seat is provided with a step, the inner wall of the impeller shell is matched with the step, and a double-channel radial small clearance fit is formed between the inner wall of the impeller shell and the step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021880510.XU CN212803715U (en) | 2020-09-01 | 2020-09-01 | Centrifugal pump choma seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021880510.XU CN212803715U (en) | 2020-09-01 | 2020-09-01 | Centrifugal pump choma seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212803715U true CN212803715U (en) | 2021-03-26 |
Family
ID=75088204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021880510.XU Active CN212803715U (en) | 2020-09-01 | 2020-09-01 | Centrifugal pump choma seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212803715U (en) |
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2020
- 2020-09-01 CN CN202021880510.XU patent/CN212803715U/en active Active
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