CN220081738U - Impeller and pump housing sealing assembly and pump unit with same - Google Patents
Impeller and pump housing sealing assembly and pump unit with same Download PDFInfo
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- CN220081738U CN220081738U CN202321512271.6U CN202321512271U CN220081738U CN 220081738 U CN220081738 U CN 220081738U CN 202321512271 U CN202321512271 U CN 202321512271U CN 220081738 U CN220081738 U CN 220081738U
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- impeller
- pump
- seal
- pump housing
- seal assembly
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- 238000007789 sealing Methods 0.000 title claims abstract description 65
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a sealing component of an impeller and a pump housing and a pump unit with the sealing component, wherein the pump unit comprises the impeller and the pump housing, the pump housing comprises an impeller cavity, a liquid suction inlet and a liquid discharge outlet, when the pump unit operates, the centrifugal force generated by the rotation of the impeller enables the areas connected with the suction inlet and the liquid discharge outlet in the impeller cavity to respectively form a low-pressure cavity and a high-pressure cavity correspondingly, the sealing component comprises an elastic sealing element and a spring, the elastic sealing element comprises a sealing lip and a radial outer surface, and the spring is arranged in the sealing lip of the elastic sealing element; the impeller is provided with an impeller mouth ring on the end face close to the pump head, the impeller mouth ring is provided with a radial outward extending flange, the sealing lip is attached to the radial outward extending flange, and the radial outer face is completely attached to the pump housing to form an internal pump seal. Compared with the prior art, the utility model has the advantages of reducing the friction resistance of the impeller, avoiding the leakage of liquid in the pump and the like.
Description
Technical Field
The utility model relates to wet operation pump technology, in particular to an impeller and pump casing sealing component and a pump unit with the sealing component.
Background
In a wet operation pump of a heating system, a certain sealing gap is usually left between an inlet of an impeller and a pump casing for reducing leakage loss of liquid, thereby improving operation efficiency of the pump, but the method requires as little friction between a sealing member and the impeller as possible, so the gap cannot be set too small, which results in still more flow, thereby sealing the gap to leak, and the operation efficiency of the pump cannot be effectively improved.
Through searching the prior art, patent document CN2486751 discloses a pump with an elastic sealing ring, which comprises a pump body, an impeller, a pump cover and an elastic sealing ring, and is characterized in that: the sealing ring is elastic V-shaped or U-shaped, when liquid flows back from a high pressure area to a low pressure area in the pump, the lip of the sealing ring radially contracts, the gap between the impeller and the sealing ring is reduced, and the leakage loss of the sealing ring is reduced, so that the efficiency of the pump is improved. Although this solution reduces the size of the sealing gap, the friction between the sealing ring and the impeller increases with increasing pressure, thereby causing a decrease in the efficiency of the pump and wearing the impeller and the sealing ring, which loses sealing effect when the wearing is severe.
Patent document CN110088480B discloses a sealing method of a centrifugal pump, in which the contact area with an impeller is reduced by the concave-convex and elastic structure of a seal ring, so as to achieve the purpose of reducing leakage, but the seal ring also has the problems of leakage loss and unavoidable influence of friction force, and the structure of the seal ring is complex, resulting in higher manufacturing cost.
Therefore, in order to solve the above-mentioned problems in the prior art, it is highly desirable to provide a novel pump unit structure, which improves the operation efficiency of the pump unit by preventing the leakage of the liquid in the pump and reducing the friction resistance as much as possible.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide a sealing assembly of an impeller and a pump housing and a pump unit with the sealing assembly.
The aim of the utility model can be achieved by the following technical scheme:
according to one aspect of the present utility model there is provided an impeller and pump casing seal assembly, the seal assembly being mounted on a pump unit, the pump unit comprising an impeller and a pump casing, the pump casing comprising an impeller chamber, a suction inlet and a discharge outlet for liquid, the impeller being housed in the impeller chamber, centrifugal force generated by rotation of the impeller when the pump unit is in operation causing regions of the impeller chamber connected to the suction inlet and the discharge outlet to respectively correspond to a low pressure chamber and a high pressure chamber, the seal assembly comprising an elastomeric seal comprising a sealing lip and a radially outer face, the spring being mounted within the sealing lip of the elastomeric seal;
the impeller is provided with an impeller mouth ring on the end face close to the pump head, the impeller mouth ring is provided with a radial outward extending flange, the sealing lip is attached to the radial outward extending flange, and the radial outer face is completely attached to the pump shell to form an internal pump seal;
when the impeller drives the impeller mouth ring to rotate, two pairs of friction pairs are respectively formed on the contact surface of the impeller mouth ring and the sealing lip and the contact surface of the impeller mouth ring and the pump shell.
As an optimal technical scheme, the impeller and the impeller mouth ring are fixedly arranged on the same axis.
As a preferred embodiment, the pump housing is provided with a structure for mounting the elastic seal and the impeller collar on the end face of the impeller chamber.
As a preferred technical solution, the elastic sealing element further comprises a radial inner surface, and a clearance fit is adopted between the radial inner surface and the impeller.
Preferably, the spring is mounted on any surface in the sealing lip.
As a preferable technical scheme, the gap between the elastic sealing element and the impeller mouth ring by the spring is smaller than 0.1mm.
As a preferred solution, the spring ensures that the elastic seal undergoes a compression deformation less than a set value.
As a preferable technical scheme, the elastic sealing element is a component made of elastic and wear-resistant materials.
As a preferable technical scheme, the spring is a component made of metal material with elastic force.
According to another aspect of the present utility model there is provided a pump assembly having an impeller and pump casing seal assembly, the pump assembly comprising a canned motor, an impeller, a pump casing and a bearing set, the pump casing comprising an impeller chamber, a suction inlet and a discharge outlet for liquid, centrifugal force generated by rotation of the impeller causing regions of the impeller chamber connected to the suction inlet and the discharge outlet to correspond to a low pressure chamber and a high pressure chamber respectively, the pump assembly further comprising the impeller and pump casing seal assembly.
Compared with the prior art, the utility model achieves the following technical effects:
1. the utility model provides an elastic sealing assembly, which ensures that no gap or only a tiny gap smaller than 0.1mm exists between a high-pressure cavity and a low-pressure cavity of a suction inlet and a discharge outlet of a pump unit, can ensure that no liquid leakage or only a tiny amount of liquid leakage occurs in the pump, and improves the efficiency of the pump unit;
2. the elastic sealing piece is made of elastic and wear-resistant materials, so that the tightness in the pump is ensured; meanwhile, the metal spring in the elastic sealing element can adaptively generate resistance deformation force along with the change of the pressure difference between the high-pressure cavity and the low-pressure cavity in the pump, so that the deformation amount of the elastic sealing element is controlled, the friction force between the impeller ring and the elastic sealing element is reduced, the operation efficiency of the pump unit is improved, and the service lives of the elastic sealing element and the impeller are prolonged.
Drawings
FIG. 1 is a schematic illustration of one embodiment of a pump assembly of the present utility model;
fig. 2 is an enlarged view of a portion of the seal assembly at I of fig. 1.
Wherein 1 is a rotating shaft, 2 is an impeller, 3 is a pump shell, 4 is a stator, 5 is a rotor, 6 is a stator shell, 7 is a shielding sleeve, 8 is a bearing bracket, 9 is a sliding bearing, 10 is an axial thrust sliding bearing, 11 is an elastic sealing piece, 12 is a low-pressure cavity, 13 is a high-pressure cavity, 14 is a spring, 15 is a suction inlet, 16 is a discharge outlet, and 17 is an impeller mouth ring;
111 is a sealing lip, 112 is a radially outer face, 113 is a radially inner face, and 171 is a radially outwardly extending flange.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
Example 1
As shown in fig. 1, the present utility model proposes a seal assembly of an impeller and a pump casing, the seal assembly is mounted on a pump unit, the pump unit comprises an impeller 2 and a pump casing 3, the pump casing 3 comprises an impeller chamber, a liquid suction inlet 15 and a liquid discharge outlet 16, the impeller 2 is placed in the impeller chamber, when the pump unit is operated, centrifugal force generated by rotation of the impeller 2 causes a low-pressure chamber 12 and a high-pressure chamber 13 to be respectively formed in areas, connected with the suction inlet 15 and the discharge outlet 16, of the impeller chamber.
As shown in fig. 2, the sealing assembly provided by the utility model comprises an elastic sealing element 11 and a spring 14, wherein the elastic sealing element 11 comprises a sealing lip 111, a radially outer surface 112 and a radially inner surface 113, the spring 14 is arranged on any surface in the sealing lip of the elastic sealing element 11, an impeller mouth ring 17 comprising a radially outwards extending flange 171 is arranged on the end surface of the impeller 2 close to a pump head, the impeller 2 and the impeller mouth ring 17 are fixedly arranged coaxially, a structure for installing the elastic sealing element 11 and the impeller mouth ring 17 is arranged on the end surface of the impeller chamber of the pump housing 3, a clearance fit is adopted between the radially inner surface 113 and the impeller 2, the sealing lip 111 is completely jointed with the radially outwards extending flange 171, and the radially outer surface 112 is completely jointed with the pump housing 3 to form an internal pump seal, so that the operation efficiency of the pump unit is effectively improved;
when the impeller 2 drives the impeller mouth ring 17 to rotate, two pairs of friction pairs are respectively formed on the contact surface of the impeller mouth ring 17 and the sealing lip 11 and the contact surface of the impeller mouth ring and the pump housing 3, the elastic sealing element 11 generates corresponding axial compression deformation along with the pressure difference change between the low-pressure cavity 12 and the high-pressure cavity 13, and the spring 14 adaptively generates corresponding compression deformation resistance. On the one hand, the spring 14 can enable the gap between the elastic sealing element 11 and the impeller mouth ring 17 to be smaller than 0.1mm all the time, so that no leakage or only tiny leakage of liquid in the pump is guaranteed, on the other hand, the spring 14 ensures that the compression deformation of the elastic sealing element is smaller than 0.2mm in the diameter direction, so that the friction resistance between the impeller mouth ring 17 and the elastic sealing element 11 is effectively reduced, the running efficiency of the pump unit is further improved, and meanwhile, the service lives of the elastic sealing element and the impeller are prolonged.
Example 2
As shown in fig. 1, the utility model provides a pump unit with an impeller and pump housing sealing assembly, the pump unit comprises a shielding motor, an impeller 2, a pump housing 3 and a bearing group, wherein the shielding motor comprises a rotating shaft 1, a stator 4, a rotor 5, a stator housing 6 and a shielding sleeve 7, the pump housing 3 comprises an impeller cavity, a liquid suction inlet 15 and a liquid discharge outlet 16, the impeller 2 is arranged in the impeller cavity, the bearing group comprises a bearing bracket 8, a sliding bearing 9 and an axial thrust sliding bearing 10, the impeller 2, the sliding bearing 9, the axial thrust sliding bearing 10 and the rotor 5 are sequentially arranged on the rotating shaft 1 from the pump head to the pump tail, when the pump unit is in operation, the rotor 5 drives the impeller 2 on the rotating shaft 1 to rotate, and the generated centrifugal force enables the areas connected with the suction inlet 15 and the discharge outlet 16 in the impeller cavity to respectively form a low-pressure cavity 12 and a high-pressure cavity 13.
The pump assembly of this embodiment further includes the seal assembly of embodiment 1.
The positive progress effect of this embodiment is: the utility model solves the problem of pump efficiency reduction caused by internal leakage of the pump in the conventional circulating pump, adopts the gapless seal made of the elastic wear-resistant material, can improve the pump efficiency, prolongs the service life of the pump, ensures the safe operation of the pump after the service life of the pump is prolonged, and reduces the maintenance cost of a pump unit.
While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. An impeller and pump casing seal assembly, the seal assembly being mounted on a pump unit, the pump unit comprising an impeller (2) and a pump casing (3), the pump casing (3) comprising an impeller chamber, a suction inlet (15) for liquid and a discharge outlet (16), the impeller (2) being housed in the impeller chamber, when the pump unit is in operation, centrifugal forces generated by rotation of the impeller (2) causing regions of the impeller chamber in communication with the suction inlet (15) and the discharge outlet (16) to respectively form a low pressure chamber (12) and a high pressure chamber (13), characterized in that the seal assembly comprises an elastic seal (11) and a spring (14), the elastic seal (11) comprising a sealing lip (111) and a radially outer face (112), the spring (14) being mounted in the sealing lip of the elastic seal (11);
the impeller (2) is provided with an impeller mouth ring (17) on the end face close to the pump head, the impeller mouth ring (17) is provided with a radial outward extending flange (171), the sealing lip (111) is jointed with the radial outward extending flange (171), and the radial outer surface (112) is completely jointed with the pump housing (3) to form an internal pump seal;
when the impeller (2) drives the impeller mouth ring (17) to rotate, two friction pairs are respectively formed on the contact surface of the impeller mouth ring (17) and the sealing lip (111) and the contact surface of the impeller mouth ring and the pump housing (3).
2. An impeller and pump housing seal arrangement according to claim 1, wherein the impeller (2) is mounted coaxially and fixedly to the impeller collar (17).
3. An impeller and pump housing seal arrangement according to claim 1, characterized in that the pump housing (3) is provided with means for mounting an elastomeric seal (11) and an impeller collar (17) on the end face of the impeller chamber.
4. An impeller and pump casing seal assembly according to claim 1, characterized in that the resilient seal (11) further comprises a radially inner face (113) which is in clearance fit with the impeller (2).
5. An impeller and pump housing seal assembly according to claim 1, wherein the spring (14) is mounted on any surface within the sealing lip (111).
6. An impeller and pump housing seal assembly according to claim 1 or 5, wherein the spring (14) is arranged to provide a clearance between the elastomeric seal (11) and the impeller collar (17) of less than 0.1mm.
7. An impeller and pump casing seal assembly according to claim 1 or 5, wherein the spring (14) ensures that the resilient seal undergoes a compression set less than the set point.
8. An impeller and pump casing seal assembly according to claim 1, characterized in that the resilient seal (11) is a component made of a resilient and wear resistant material.
9. An impeller and pump casing seal assembly according to claim 1, characterized in that the spring (14) is a component made of a metallic material having a resilient force.
10. A pump unit with impeller and pump housing seal assembly, the pump unit comprising a canned motor, an impeller (2), a pump housing (3) and a bearing set, the pump housing (3) comprising an impeller chamber, a suction inlet (15) for liquid and a discharge outlet (16), the centrifugal force generated by rotation of the impeller (2) causing the areas of the impeller chamber connected to the suction inlet (15) and the discharge outlet (16) to form a low pressure chamber (12) and a high pressure chamber (13) respectively, characterized in that the pump unit further comprises an impeller and pump housing seal assembly according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321512271.6U CN220081738U (en) | 2023-06-14 | 2023-06-14 | Impeller and pump housing sealing assembly and pump unit with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321512271.6U CN220081738U (en) | 2023-06-14 | 2023-06-14 | Impeller and pump housing sealing assembly and pump unit with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220081738U true CN220081738U (en) | 2023-11-24 |
Family
ID=88824342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321512271.6U Active CN220081738U (en) | 2023-06-14 | 2023-06-14 | Impeller and pump housing sealing assembly and pump unit with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220081738U (en) |
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2023
- 2023-06-14 CN CN202321512271.6U patent/CN220081738U/en active Active
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