CN217558563U - Double-suction high-lift balance type odd-level centrifugal pump - Google Patents
Double-suction high-lift balance type odd-level centrifugal pump Download PDFInfo
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- CN217558563U CN217558563U CN202221214171.0U CN202221214171U CN217558563U CN 217558563 U CN217558563 U CN 217558563U CN 202221214171 U CN202221214171 U CN 202221214171U CN 217558563 U CN217558563 U CN 217558563U
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Abstract
The utility model discloses a double-suction high-lift balance type odd-level centrifugal pump, which comprises a pump shaft, wherein a pump shaft coupler, a bearing body A component, a first-stage impeller, a forward impeller, a middle pressure reducing sleeve, a reverse impeller, a rear pressure reducing sleeve, a packing shaft sleeve, a bearing retaining sleeve and a bearing body B component are sequentially arranged on the pump shaft; the first-stage impeller suction inlet is of a double-suction impeller structure, and the forward impellers and the reverse impellers are the same in number and are arranged in a forward and reverse mode. The centrifugal pump replaces the original single-suction impeller with the double-suction impeller on the basis of the self-balancing multistage pump, when the pump is in odd stages, the positive and negative secondary impellers are symmetrically arranged at two sides of the discharge section, the axial force is automatically balanced, the first-stage impeller is the double-suction impeller, and the axial force is also automatically balanced; meanwhile, in consideration of the conditions that certain errors exist in part machining and uneven wear occurs in use, the pump rotor can generate partial residual axial force, and a pair of single-row angular contact ball bearings is arranged to bear the residual axial force.
Description
Technical Field
The utility model relates to a centrifugal pump field, in particular to balanced type odd number level centrifugal pump of double suction high lift.
Background
The existing self-balancing multistage pump (figure 1) is a single-suction sectional multistage centrifugal pump, and the suction inlet of the pump can be arranged vertically upwards or horizontally, and the discharge outlet can be arranged vertically upwards. Mainly comprises the following steps: the automatic balancing pump comprises a suction section, a middle section, a discharge section, a secondary suction section, a positive guide vane, a negative guide vane, a positive impeller, a negative impeller, a shaft, a throttling pressure reducing device, a retaining sleeve, a bearing body, a transition pipe and other parts, and is provided with impeller rotor parts which are symmetrically arranged, axial forces generated by symmetrical impellers of all stages are mutually offset, the automatic balancing of huge axial thrust in a pump cavity can be realized without adopting a balance disc structure, and the axial forces are generally balanced by a thrust bearing arranged at a non-driving end.
The main disadvantages are: for the multistage centrifugal pump with odd-level high lift, the number of the reverse impellers is one more than that of the positive impellers, so that the axial force is large, and the service life of a thrust bearing is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The main object of the utility model is to provide a double suction high lift balance type odd-level centrifugal pump, this centrifugal pump replaces the original single suction impeller with the double suction impeller on the basis of the self-balancing multistage pump, when the pump is the odd-level, set up the positive and negative secondary impeller symmetrically in spitting out the section both sides, the axial force is automatic balance, the first-level impeller is the double suction impeller, the axial force is also automatic balance; meanwhile, in consideration of the conditions that certain errors exist in part machining and uneven wear occurs in use, the pump rotor can generate partial residual axial force, and a pair of single-row angular contact ball bearings is arranged to bear the residual axial force.
In order to realize the technical characteristics, the purpose of the utility model is realized as follows: a double-suction high-lift balance type odd-level centrifugal pump comprises a pump shaft, wherein a pump coupler, a bearing body A assembly, a first-level impeller, a forward impeller, a middle pressure reducing sleeve, a reverse impeller, a rear pressure reducing sleeve, a packing shaft sleeve, a bearing retaining sleeve and a bearing body B assembly are sequentially arranged on the pump shaft; the first-stage impeller suction inlet is of a double-suction impeller structure, and the forward impellers and the reverse impellers are the same in number and are arranged in a forward and reverse mode.
The bearing body assembly comprises a bearing body A, a cylindrical roller bearing, a bearing end cover and a connecting piece thereof; the end head of the pump shaft is rotatably arranged inside the bearing body A through a cylindrical roller bearing; the cylindrical roller bearing is installed inside the bearing body A in a limiting mode through the bearing end cover.
The bearing body assembly B comprises a bearing body B, a cylindrical roller bearing, an angular contact bearing, a bearing spacer bush, a bearing end cover and a connecting piece of the bearing end cover; the cylindrical roller bearing is sleeved on the pump shaft, and the pump shaft is rotatably supported in the bearing body B; the angular contact bearings are divided into two groups and are arranged in the bearing body B in the opposite direction; a bearing bush is sleeved outside the angular contact bearing; and the bearing bush is in clearance fit with a bearing hole of the bearing body B.
A flow guide body is arranged outside the first-stage impeller, the flow guide body is arranged on the water inlet section, and the water inlet section is connected with the front cover, the partition plate, the middle section, the water outlet section and the rear section together through a pull rod; the front cover and the flow guide body are provided with a primary opening ring; the reverse guide vane is arranged outside the reverse impeller.
A guide vane and a middle section are arranged outside the forward impeller, a guide vane sleeve is arranged on the guide vane, a secondary port ring is arranged on the middle section, and a forward final-stage guide vane and a reverse final-stage guide vane are respectively arranged outside the forward final-stage impeller and the reverse final-stage impeller; and water outlet sections are arranged outside the forward final stage guide vane and the reverse final stage guide vane.
The water outlet section is provided with a middle sealing sleeve and connected with the rear section through a bent pipe.
The rear section is provided with a rear pressure reducing sleeve, the rear pressure reducing sleeve is provided with a rear sealing sleeve, and the rear section is connected with the tail cover; the tail cover is provided with a packing gland and a packing cavity, and packing and a packing ring are arranged in the packing cavity.
The primary impeller and the forward impeller are positioned through a middle sleeve, and a primary sealing sleeve is arranged on the middle sleeve.
A balance water pipe system is also included.
The utility model discloses there is following beneficial effect:
1. by using the double-suction impeller to replace the original single-suction impeller on the basis of the self-balancing multistage pump, when the pump is in an odd level, the positive and negative secondary impellers are symmetrically arranged on two sides of the discharge section, the axial force is automatically balanced, the primary impeller is the double-suction impeller, and the axial force is also automatically balanced; meanwhile, in consideration of the conditions that certain errors exist in part machining and uneven wear occurs in use, the pump rotor can generate partial residual axial force, and a pair of single-row angular contact ball bearings is arranged to bear the residual axial force.
2. The utility model discloses multistage centrifugal pump through adopting the first impeller of double suction, is better than traditional self-balancing multistage pump cavitation erosion performance, and application range is wider, can realize the automatic balance of the high lift multistage centrifugal pump axial force of odd number simultaneously.
3. The utility model discloses well adoption is at cylindrical roller bearing of drive end installation, at cylindrical roller bearing of non-drive end installation and a pair of single-row angular contact ball bearing, can realize that angular contact ball bearing only undertakes less residual axial force, has improved the life of bearing greatly.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 shows a conventional single-suction sectional multistage centrifugal pump.
Fig. 2 is the overall structure diagram of the present invention.
Fig. 3 is the local structure diagram of the second bearing assembly of the present invention.
In the figure: 1. the pump comprises a pump coupling, 2, a bearing body A assembly, 3, a front cover, 4, a flow guide body, 5, a water inlet section, 6, a partition plate, 7, a guide vane, 8, a middle section, 9, a forward final stage guide vane, 10, a water outlet section, 11, a bent pipe, 12, a reverse final stage guide vane, 13, a reverse guide vane, 14, a rear section, 15, a tail cover, 16, a bearing body B assembly, 17, a bearing baffle sleeve, 18, a packing gland, 19, a packing shaft sleeve, 20, a packing ring, 21, a rear sealing sleeve, 22, a rear pressure reducing sleeve, 23, a secondary port ring, 24, a reverse impeller, 25, a guide vane sleeve, 26, a reverse final stage impeller, 27, a middle sealing sleeve, 28, a middle sleeve, 29, a forward impeller, 30, a middle sleeve, 31, a first sealing sleeve, 32, a first impeller, 33, a first port ring, 34, a pull rod, a water pipe 35, a pump shaft, 36, a balance pressure reducing system, 37, a cylindrical roller bearing, 38, an angular contact, 39 and a bearing bush.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
Example 1:
as shown in fig. 2-3, a double-suction high-lift balance type odd-numbered stage centrifugal pump comprises a pump shaft 35, wherein a pump coupler 1, a bearing body a component 2, a first-stage impeller 32, a forward impeller 29, a middle pressure reducing sleeve 28, a reverse impeller 24, a rear pressure reducing sleeve 22, a packing shaft sleeve 19, a bearing retaining sleeve 17 and a bearing body b component 16 are sequentially arranged on the pump shaft 35; the suction inlet of the first-stage impeller 32 is of a double-suction impeller structure, and the forward impellers 29 and the reverse impellers 24 are the same in number and are arranged in a forward and reverse manner. The first-stage impeller 32 adopting the double-suction impeller structure has better cavitation performance and wider application range than the traditional self-balancing multistage pump. And aiming at the odd-numbered stage high-lift multistage centrifugal pump shaft, the forward impellers 29 and the reverse impellers 24 are adopted and are in forward and reverse arrangement, so that the automatic balance of the axial force is realized.
Further, the bearing body assembly 2 comprises a bearing body A, a cylindrical roller bearing, a bearing end cover and a connecting piece thereof; the end of the pump shaft 35 is rotatably arranged inside the bearing body A through a cylindrical roller bearing; the cylindrical roller bearing is installed inside the bearing body A in a limiting mode through the bearing end cover. The bearing body assembly 2 described above can be used to effectively support the input end of the pump shaft 35 in rotation.
Further, the bearing body b assembly 16 includes a bearing body b, a cylindrical roller bearing 37, an angular contact bearing 38, a bearing spacer, a bearing bush 39, a bearing end cover and a connecting member thereof; the cylindrical roller bearing 37 is sleeved on the pump shaft 35 and rotatably supports the pump shaft 35 in the bearing body B; the angular contact bearings 38 are divided into two groups and are arranged in the bearing body B in opposite directions; a bearing bush 39 is sleeved outside the angular contact bearing 38; and the bearing bush 39 and the bearing hole of the bearing body B are in clearance fit. The bearing body assembly B16 can be used for rotatably supporting the non-input end of the pump shaft 35, so that the bearing body assembly B can bear radial force and can bear certain axial force.
In addition, the bearing bush 39 is sleeved outside the angular contact bearing 38, and the bearing bush 39 and the bearing hole of the bearing body B are in clearance fit, so that the angular contact bearing 38 only bears axial force and does not bear radial force in the operation process, the service life is effectively prolonged, and the occurrence of transitional wear is prevented.
Further, a flow guide body 4 is arranged outside the first-stage impeller 32, the flow guide body 4 is arranged on the water inlet section 5, and the water inlet section 5 is connected with the front cover 3, the partition plate 6, the middle section 8, the water outlet section 10 and the rear section 14 through a pull rod 34; the front cover 3 and the flow guide body 4 are provided with a primary opening ring 33; the reverse vane 13 is mounted on the outside of the reverse impeller 24. The primary impeller 32 adopts a double-suction impeller structure, so that the axial force can be automatically balanced.
Further, a guide vane 7 and a middle section 8 are arranged outside the forward impeller 29, a guide vane sleeve 25 is arranged on the guide vane 7, a secondary port ring 23 is arranged on the middle section 8, and a forward final-stage guide vane 9 and a reverse final-stage guide vane 12 are respectively arranged outside the forward final-stage impeller and the reverse final-stage impeller 26; and water outlet sections 10 are arranged outside the positive final stage guide vanes 9 and the reverse final stage guide vanes 12.
Furthermore, the water outlet section 10 is provided with a middle sealing sleeve 27, and the water outlet section 10 is connected with the rear section 14 through the elbow pipe 11.
Further, a rear decompression sleeve 22 is arranged on the rear section 14, a rear sealing sleeve 21 is arranged on the rear decompression sleeve 22, and the rear section 14 is connected with the tail cover 15; the tail cover 15 is provided with a packing gland 18 and a packing cavity, and packing and a packing ring 20 are arranged in the packing cavity. A good sealing effect can be achieved by the packing gland 18 and the packing ring 20 described above.
Further, the first-stage impeller 32 and the forward-direction impeller 29 are positioned through an intermediate sleeve 30, and a first-stage sealing sleeve 31 is arranged on the intermediate sleeve 30. The intermediate sleeve 30 described above enables axial positioning between adjacent impellers and the primary sealing sleeve 31 enables sealing.
Further, a balance water pipe system 36 is included. The balancing water pipe system 36 described above enables the balancing of the water pressure inside the pump body.
The utility model has the advantages that:
1. the utility model discloses a first impeller of double entry impeller structure, it is better than traditional self-balancing multistage pump cavitation erosion performance, application range is wider, can realize the automatic balance of odd number high lift multistage centrifugal pump axial force simultaneously.
2. The utility model discloses an adopt at cylindrical roller bearing of drive end installation, at cylindrical roller bearing of non-drive end installation and a pair of single-row angular contact ball bearing, can realize that angular contact ball bearing only undertakes less residual axial force, improved the life of bearing greatly.
Claims (9)
1. A double-suction high-lift balance type odd-level centrifugal pump comprises a pump shaft (35), wherein a pump coupler (1), a bearing body A assembly (2), a first-level impeller (32), a forward-direction impeller (29), a middle pressure reducing sleeve (28), a reverse-direction impeller (24), a rear pressure reducing sleeve (22), a packing shaft sleeve (19), a bearing baffle sleeve (17) and a bearing body B assembly (16) are sequentially arranged on the pump shaft (35); the method is characterized in that: the suction inlet of the primary impeller (32) is of a double-suction impeller structure, and the forward impellers (29) and the reverse impellers (24) are the same in number and are arranged in a forward and reverse mode.
2. The double suction high head balanced type odd-numbered stage centrifugal pump according to claim 1, wherein: the bearing body A assembly (2) comprises a bearing body A, a cylindrical roller bearing, a bearing end cover and a connecting piece thereof; the end head of the pump shaft (35) is rotatably arranged inside the bearing body A through a cylindrical roller bearing; the cylindrical roller bearing is installed inside the bearing body A in a limiting mode through the bearing end cover.
3. The double suction high head balanced type odd-numbered stage centrifugal pump according to claim 1, wherein: the bearing body B assembly (16) comprises a bearing body B, a cylindrical roller bearing (37), an angular contact bearing (38), a bearing spacer bush, a bearing bush (39), a bearing end cover and a connecting piece of the bearing end cover; the cylindrical roller bearing (37) is sleeved on the pump shaft (35) and rotatably supports the pump shaft (35) in the bearing body B; the angular contact bearings (38) are divided into two groups and are arranged in the bearing body B in opposite directions; a bearing bush (39) is sleeved outside the angular contact bearing (38); and the bearing bush (39) is in clearance fit with a bearing hole of the bearing body B.
4. The double suction high head balanced type odd-numbered stage centrifugal pump according to claim 1, wherein: a flow guide body (4) is arranged outside the first-stage impeller (32), the flow guide body (4) is arranged on the water inlet section (5), and the water inlet section (5) is connected with the front cover (3), the partition plate (6), the middle section (8), the water outlet section (10) and the rear section (14) through a pull rod (34); a primary opening ring (33) is arranged on the front cover (3) and the flow guide body (4); the reverse guide vane (13) is arranged outside the reverse impeller (24).
5. The double suction high lift balanced type odd-numbered stage centrifugal pump of claim 1, wherein: a guide vane (7) and a middle section (8) are arranged outside the forward impeller (29), a guide vane sleeve (25) is arranged on the guide vane (7), a secondary port ring (23) is arranged on the middle section (8), and a forward final-stage guide vane (9) and a reverse final-stage guide vane (12) are respectively arranged outside the forward final-stage impeller and the reverse final-stage impeller (26); and water outlet sections (10) are arranged outside the forward final stage guide vane (9) and the reverse final stage guide vane (12).
6. The double suction high head balanced type odd-numbered stage centrifugal pump according to claim 5, wherein: the water outlet section (10) is provided with a middle sealing sleeve (27), and the water outlet section (10) is connected with the rear section (14) through a bent pipe (11).
7. The double suction high head balanced type odd-numbered stage centrifugal pump according to claim 6, wherein: a rear decompression sleeve (22) is arranged on the rear section (14), a rear sealing sleeve (21) is arranged on the rear decompression sleeve (22), and the rear section (14) is connected with the tail cover (15); the tail cover (15) is provided with a packing gland (18) and a packing cavity, and packing and a packing ring (20) are arranged in the packing cavity.
8. The double suction high lift balanced type odd-numbered stage centrifugal pump of claim 1, wherein: the primary impeller (32) and the forward impeller (29) are positioned through a middle sleeve (30), and a primary sealing sleeve (31) is arranged on the middle sleeve (30).
9. The double suction high head balanced type odd-numbered stage centrifugal pump according to claim 1, wherein: also included is a balance water pipe system (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221214171.0U CN217558563U (en) | 2022-05-20 | 2022-05-20 | Double-suction high-lift balance type odd-level centrifugal pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221214171.0U CN217558563U (en) | 2022-05-20 | 2022-05-20 | Double-suction high-lift balance type odd-level centrifugal pump |
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| CN217558563U true CN217558563U (en) | 2022-10-11 |
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| CN202221214171.0U Active CN217558563U (en) | 2022-05-20 | 2022-05-20 | Double-suction high-lift balance type odd-level centrifugal pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909293A (en) * | 2022-05-20 | 2022-08-16 | 宜昌市西峡泵业有限公司 | Double-suction high-lift balance type odd-level centrifugal pump and operation method |
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2022
- 2022-05-20 CN CN202221214171.0U patent/CN217558563U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909293A (en) * | 2022-05-20 | 2022-08-16 | 宜昌市西峡泵业有限公司 | Double-suction high-lift balance type odd-level centrifugal pump and operation method |
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