CN204553315U - A kind of horizontal middle open type double-volute multistage centrifugal pump - Google Patents
A kind of horizontal middle open type double-volute multistage centrifugal pump Download PDFInfo
- Publication number
- CN204553315U CN204553315U CN201520064479.5U CN201520064479U CN204553315U CN 204553315 U CN204553315 U CN 204553315U CN 201520064479 U CN201520064479 U CN 201520064479U CN 204553315 U CN204553315 U CN 204553315U
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- China
- Prior art keywords
- impeller
- volute
- centrifugal pump
- open type
- axle
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- 239000000314 lubricant Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 claims description 2
- 230000001186 cumulative effect Effects 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000003889 chemical engineering Methods 0.000 abstract 1
- 239000003245 coal Substances 0.000 abstract 1
- 238000005461 lubrication Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model belongs to fluid conveying machine technical field, is specifically related to horizontal middle open type double-volute multistage centrifugal pump, is applicable to petrochemical plant, coal chemical engineering equipment and pipeline conveying etc.Each impeller of this device and axle are interference fit, and axle is respectively equipped with the impeller snap ring to each impeller axially locating, the internal surface of nockbush is provided with meshed grooves.The utility model structure is simple, and reasonable in design, generalization degree is higher, and the cumulative error of integral rotor is little, long service life, and axial seal is good, operates steadily, bearing long service life.
Description
Technical field
The utility model belongs to fluid conveying machine technical field, is specifically related to a kind of horizontal middle open type double-volute multistage centrifugal pump.
Background technique
Generally adopt axle sleeve to locate between the impeller of the middle open type double-volute multistage centrifugal pump of prior art and impeller, therefore can not meet the requirement of relevant criterion; Simultaneously because the fitting surface of this structure has increase, result in cumulative error large, be unfavorable for the adjustment of rotor form and position tolerance; In addition, restrictor sleeve and being slidably matched of nockbush are all smooth surfaces, and axial seal is undesirable, also have impact on the working efficiency of pump.
Summary of the invention
The utility model improves for the technical problem of above-mentioned existence, provides a kind of horizontal middle open type double-volute multistage centrifugal pump of improvement, device product with compact structure, handsome in appearance, energy-efficient, safety and environmental protection, easy to maintenance.
To achieve these goals, the technical solution of the utility model is as follows: each impeller and axle are interference fit, axle is respectively equipped with the impeller snap ring to each impeller axially locating, each impeller, separately in axially locating, can make the cumulative error of integral rotor greatly reduce.
The internal surface of the nockbush of this multistage centrifugal pump is provided with meshed grooves, define equally distributed projection, be not only conducive to the lubrication that is slidably matched and improve working life, improving axial seal simultaneously, reduce medium backflow vertically, improve the working efficiency of pump.
Pump drive end bearing adopts columna roller bearing, and non-driven-end bearing adopts two row angular contact ball bearings, such layout make the location of pump reliable, to operate steadily and without axial float.Be provided with water cooling chamber in the below of bearing support lubricant reservoir, the inlet/outlet in water cooling chamber connects cooling water intake joint and coolant outlet joint respectively, more effectively can reduce the oil temperature in bearing support lubricant reservoir, improves bearing working life.
Impeller on the axle of this multistage centrifugal pump is back-to-back layout, the axial force that can produce in balancing work.
1. impeller adopts back-to-back arrangement form, Equilibrium axial force.
2. each impeller and axle are interference fit, and adopt hot charging and independent axially locating, the cumulative error of integral rotor is little.
3. nockbush is provided with meshed grooves, forms equally distributed projection, is not only conducive to the lubrication that is slidably matched and improves working life, improving axial seal simultaneously, reducing medium backflow vertically, improving the working efficiency of pump.
4. angular contact ball bearing paired mounting, bears axial force uniformly, and cylindrical roller ball bearing is used for bearing radial force, thus make the location of pump reliable, to operate steadily and without axial float.
5. outside bearing support lubricant reservoir, set up waterway, effectively reduce the temperature of lubricant oil, improve bearing working life.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and enforcement, the utility model is further described.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is Fig. 1 left view.
Fig. 3 is that impeller fixes snap ring position enlarged view.
Fig. 4 is nockbush position enlarged view.
In figure: 1. upper pump casing, 2. lower pump body, 3. chopped-off head casing ring, impeller ring 4., 5. impeller snap ring, 6. internal liner, impeller ring 7., 8. interstage bushing, 9. middle axle sleeve, 10. middle anti-wearing liner, 11. impellers, 12. nockbushes, 13. mechanical seals, 14. restrictor sleeves, 15. axles, 16. drive end bearing bodies, 17. non-driven-end bearing bodies, 18. alignment pin, 19. balance tubes.
Embodiment
By reference to the accompanying drawings the utility model is further elaborated.
As shown in Figure 1, this multistage centrifugal pump comprises upper pump casing 1, lower pump body 2, axle 15, impeller 11, drive end bearing body 16, non-driven-end bearing body 17, impeller 11 is placed in the pump housing, it is interference fit between impeller 11 and axle 15, and axially locate (referring to Fig. 3) separately by impeller snap ring 5, the form and position tolerance reducing the whole rotor that other pump adopts axle sleeve location to bring because of axle sleeve form and position tolerance is overproof.Impeller 11 is provided with multiple tandem compound and forms supercharging step by step, left-half contrary with the arragement direction of right half part impeller 11 (namely arranging back-to-back), Equilibrium axial force; Be slidably matched between the front impeller ring 4 of impeller and the casing ring of rear impeller ring 7 respectively at correspondence, be provided with middle anti-wearing liner 10 and middle axle sleeve 9 in the centre of left and right two-part impeller, be slidably matched between the two; In pump zone of high pressure and drive end side, be respectively equipped with the nockbush 12 and restrictor sleeve 14 that are slidably matched, the internal surface of nockbush 12 is provided with meshed grooves, defines equally distributed projection (referring to Fig. 4), and sealing effect is better, can more effectively Leakage prevention.The two ends that the pump housing is connected with axle 5 are provided with mechanical seal 13, drive end bearing body 16 and non-driven-end bearing body 17 is separately installed with at axle 15 two ends of stretching out the pump housing, the axle head stretching out drive end bearing body is connected with motor output shaft, power is rotated by axle 15 impeller 11, thus reaches the object of fed sheet of a media.
As shown in Figure 3, impeller snap ring 5 is utilized to fix separately each impeller.
As shown in Figure 4, the nockbush 12 be slidably matched and restrictor sleeve 14, make it is characterized in that, offers meshed grooves at the internal surface of nockbush 12, forms equally distributed projection.
Claims (4)
1. a horizontal middle open type double-volute multistage centrifugal pump, is characterized in that: each impeller and axle are interference fit, axle is respectively equipped with the impeller snap ring to each impeller axially locating.
2., by horizontal middle open type double-volute multistage centrifugal pump according to claim 1, it is characterized in that: the internal surface of nockbush is provided with meshed grooves.
3. by horizontal middle open type double-volute multistage centrifugal pump according to claim 2, it is characterized in that: pump drive end bearing adopts columna roller bearing, non-driven-end bearing adopts two row angular contact ball bearings, be provided with water cooling chamber in the below of bearing support lubricant reservoir, the inlet/outlet in water cooling chamber connects cooling water intake joint and coolant outlet joint respectively.
4., by horizontal middle open type double-volute multistage centrifugal pump according to claim 2, it is characterized in that: the impeller on axle is back-to-back layout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520064479.5U CN204553315U (en) | 2015-01-30 | 2015-01-30 | A kind of horizontal middle open type double-volute multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520064479.5U CN204553315U (en) | 2015-01-30 | 2015-01-30 | A kind of horizontal middle open type double-volute multistage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204553315U true CN204553315U (en) | 2015-08-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520064479.5U Active CN204553315U (en) | 2015-01-30 | 2015-01-30 | A kind of horizontal middle open type double-volute multistage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204553315U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864095A (en) * | 2016-05-18 | 2016-08-17 | 湖南南方长河泵业有限公司 | Split case pump capable of preventing bearing against high-temperature damage |
| CN107091234A (en) * | 2017-04-12 | 2017-08-25 | 广州昕恒广圆机械设备有限公司 | A kind of high-precision bearing pin of middle-opening pump and its application method |
-
2015
- 2015-01-30 CN CN201520064479.5U patent/CN204553315U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864095A (en) * | 2016-05-18 | 2016-08-17 | 湖南南方长河泵业有限公司 | Split case pump capable of preventing bearing against high-temperature damage |
| CN107091234A (en) * | 2017-04-12 | 2017-08-25 | 广州昕恒广圆机械设备有限公司 | A kind of high-precision bearing pin of middle-opening pump and its application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |