CN212360201U - Same-direction sequence impeller arrangement non-cantilever type magnetic force driving pump - Google Patents
Same-direction sequence impeller arrangement non-cantilever type magnetic force driving pump Download PDFInfo
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- CN212360201U CN212360201U CN202021643499.5U CN202021643499U CN212360201U CN 212360201 U CN212360201 U CN 212360201U CN 202021643499 U CN202021643499 U CN 202021643499U CN 212360201 U CN212360201 U CN 212360201U
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Abstract
The utility model relates to a magnetic drive pump technical field provides a syntropy preface impeller arranges non-cantilever type magnetic drive pump, include: the secondary pressure shell, the pump body, the connecting shell and the bearing box body are fixedly connected in sequence; a plurality of impellers are arranged on the pump shaft; the impellers can be divided into a front-section impeller set and a rear-section impeller set, and a bearing body is arranged between the front-section impeller set and the rear-section impeller set; a pump cover body is arranged behind the pump body, and a static balance disc ring, a dynamic balance disc ring, a second thrust bearing and a second sliding bearing are arranged in the pump body; the static balance disc ring is arranged on the pump cover body, and the dynamic balance disc ring is arranged on the last-stage impeller; the second thrust bearing and the second sliding bearing are sleeved on the pump shaft and are in contact with each other; the second sliding bearing is arranged on the pump cover body; an isolation sleeve assembly is arranged between the pump cover body and the connecting shell; an external magnetic driving assembly is arranged in the connecting shell. The utility model discloses can promote magnetic drive pump job stabilization nature and security.
Description
Technical Field
The utility model relates to a magnetic drive pump technical field especially relates to a syntropy preface impeller arranges non-cantilever type magnetic drive pump.
Background
The magnetic driving pump is widely applied to the high-risk fluid conveying field such as petroleum, petrochemical industry, nuclear power and the like. The magnetic driving pump is generally composed of a pump head (single-stage or multi-stage), a magnetic driving coupler, an isolation sleeve assembly, a driving machine and the like, wherein an inner magnetic rotor and an impeller of the pump form a rotor assembly, the rotor assembly is driven by an outer magnetic driving assembly in a non-contact mode, the outer magnetic driving assembly is rigidly connected with the driving machine through a mechanical coupler through a driving shaft, so that the non-contact power transmission of the driving machine to the pump is realized, the internal and external magnetic driving assemblies are separated by high-strength metal or non-metal sleeves to seal transmitted fluid, and gaskets are adopted for static sealing between related sealing elements, so that the transmitted fluid is prevented from leaking in principle.
However, in the back-to-back arrangement impeller structure mode of the conventional high-lift centrifugal pump, the general magnetic drive centrifugal pump is combined with the ordinary centrifugal pump and the magnetic coupler to form a special shaft seal-free magnetic drive centrifugal pump, and the centrifugal pump has the structural problem of the ordinary centrifugal pump. The high-lift magnetic force driving pump in the prior art has the advantages that the heat dissipation problem of a magnetic coupler, the problems of unbalanced axial force and radial force generated by a centrifugal pump head and the like must be simultaneously solved, if the axial force of the pump head is not treated, the sliding bearing is damaged in the running process, further, the rotor rotating at high speed can generate short-time high-temperature concentration to generate cavitation damage and burn out the rotor of the magnetic coupler, and the short-time local overheating can also cause permanent demagnetization of the rotor material of the magnetic coupler.
SUMMERY OF THE UTILITY MODEL
The utility model discloses mainly solve the axial force and the radial force unbalance that prior art's high-lift magnetic force actuation pump produced, make the axial force that the centrifugal pump head produced can dynamic balance to and high-pressure medium technical problem such as heat dissipation and lubricated slide bearing of isolation cover inner loop, the utility model provides a non-cantilever type magnetic force actuation pump is arranged to syntropy preface impeller to promote magnetic force actuation pump job stabilization nature and security.
The utility model provides a syntropy preface impeller arranges non-cantilever type magnetic force actuation pump, include: the secondary pressure shell (1), the pump body (13), the connecting shell (17) and the bearing box body (24) are fixedly connected in sequence;
a pump shaft (5) is arranged in the secondary pressure shell (1); one end of the pump shaft (5) is provided with a suction end cover (2), and the other end of the pump shaft is arranged in a connecting shell (17); a plurality of impellers (4) are arranged on the pump shaft (5);
the impellers (4) can be divided into a front-section impeller set and a rear-section impeller set, a bearing body (8) is arranged between the front-section impeller set and the rear-section impeller set, and the bearing body (8) is fixedly connected with a first sliding bearing (7); the first sliding bearing (7) is in contact with the first thrust bearing (6), and the first thrust bearing (6) and the first sliding bearing (7) are respectively sleeved on the pump shaft (5);
a pump cover body is arranged behind the pump body (13), and a static balance disc ring (11), a dynamic balance disc ring (12), a second thrust bearing (14) and a second sliding bearing (15) are arranged in the pump body (13); the static balance disc ring (11) is arranged on the pump cover body, and the dynamic balance disc ring (12) is arranged on the last-stage impeller (4); the second thrust bearing (14) and the second sliding bearing (15) are sleeved on the pump shaft (5), and the second thrust bearing (14) is in contact with the second sliding bearing (15); the second sliding bearing (15) is arranged on the pump cover body; an isolation sleeve assembly (16) is arranged between the pump cover body and the connecting shell (17);
an external magnetic driving assembly (18) is arranged in the connecting shell (17); a third sliding bearing (19), a third thrust bearing (20), an inner magnetic rotor component (21) and a balance auxiliary impeller (22) are arranged in the outer magnetic drive component (18); the third sliding bearing (19), the third thrust bearing (20) and the inner magnetic rotor assembly (21) are respectively sleeved on the pump shaft (5), the third sliding bearing (19) is contacted with the third thrust bearing (20), and the third thrust bearing (20) is arranged on the pump cover body; the balance auxiliary impeller (22) is arranged at the end part of the pump shaft (5) through the inner magnetic rotor assembly (21);
a transmission shaft (26) is arranged in the bearing box body (24); the transmission shaft (26) is fixedly connected with the external magnetic driving assembly (18).
Preferably, the suction end cover (2) is fixedly connected with the pump middle section shell (3), the number of the pump middle section shells (3) is multiple, and the pump middle section shell (3) is arranged in the secondary pressure shell (1); the number of the pump middle section shell (3) is consistent with that of the impellers (4).
Preferably, one end of the transmission shaft (26) close to the external magnetic drive assembly (18) is provided with a first rolling bearing (25), and the other end is provided with a second rolling bearing (29).
Preferably, a constant-position oil cup (27) and an oil level indicator (28) which are communicated with the bearing box body (24) are respectively arranged outside the bearing box body; the constant-position oil cup (27) and the oil level indicator (28) are distributed on two sides of the bearing box body (24).
Preferably, a first through rod (9) is arranged between the bearing body (8) and the pump body (13).
Preferably, a second penetrating rod (10) is arranged between the suction end cover (2) and the pump body (13); the second through bar (10) penetrates through the bearing body (8).
Preferably, a labyrinth seal assembly (23) is provided on the drive shaft (26) and the front cover of the bearing housing (24).
Preferably, a bearing isolator (30) is arranged at the rear end of the bearing box body (24), and a sealing ring is arranged in the bearing isolator (30) and is attached to the transmission shaft (26).
The utility model provides a pair of syntropy preface impeller arranges non-cantilever type magnetic force actuation pump, compare with prior art and have following advantage:
1. aiming at the problem of unbalance of axial force and radial force, the utility model discloses a load sharing of progression front bearing, stride the bearing arrangement with multistage impeller, effectively share the dead weight load and the radial load of a plurality of impellers, promote magnetic drive pump job stabilization nature; the bearing capacity is calculated by adopting the multi-supporting-point sliding bearing and the fluid viscosity estimated by the sliding bearing, the inner magnetic rotor and the impeller set are evenly distributed on two sides of the sliding bearing according to the self-weight, the bearing requirement is met, and meanwhile, the calculation is performed according to a liquid film theory when the sliding bearing works, so that the practical checking of a rotor assembly mechanical model is completed.
2. The utility model discloses a magnetic drive pump has changed traditional high-lift centrifugal pump's back to back arrangement impeller structure mode in the past, has axial and radial wheel hub slot, high-pressure inner loop, safe and reliable according to self impeller structural feature.
3. Besides meeting the specific requirements of a high-lift magnetic drive pump, the double-layer pressure-bearing shell structure is also suitable for an ultrahigh-lift high-inlet pressure system, and is also suitable for the operating environment of high-temperature fluid conveying.
Drawings
Fig. 1 is a cross-sectional view of a co-rotating impeller arrangement non-cantilevered magnetically driven pump provided by the present invention;
FIG. 2 is a partial enlarged view of FIG. 1;
FIG. 3 is a second enlarged view of a portion of FIG. 1;
fig. 4 is a schematic structural view of the impeller.
Reference numerals: 1. a secondary pressure housing; 2. a suction end cap; 3. a pump middle section housing; 4. an impeller; 5. a pump shaft; 6. a first thrust bearing; 7. a first sliding bearing; 8. a bearing body; 9. a first penetrating bar; 10. a second penetrating bar; 11. a static balancing disk ring; 12. a dynamic balance disc ring; 13. a pump body; 14. a second thrust bearing; 15. a second sliding bearing; 16. an isolation sleeve assembly; 17. connecting the shell; 18. an external magnetic drive assembly; 19. a third sliding bearing; 20. a third thrust bearing; 21. an inner magnetic rotor assembly; 22. balancing the auxiliary impeller; 23. a labyrinth seal assembly; 24. a bearing housing; 25. a first rolling bearing; 26. a drive shaft; 27. a constant position oil cup; 28. a fuel gauge indicator; 29. a second rolling bearing; 30. a bearing isolator.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant portions of the present invention are shown in the drawings.
Fig. 1 is a cross-sectional view of a co-rotating impeller arrangement non-cantilevered magnetically driven pump provided by the present invention; FIG. 2 is a partial enlarged view of FIG. 1; fig. 3 is a partially enlarged view ii of fig. 1. As shown in fig. 1-3, the embodiment of the present invention provides a non-cantilever type magnetic force driven pump with same-sequence impeller arrangement, including: the secondary pressure shell 1, the pump body 13, the connecting shell 17 and the bearing box body 24 are fixedly connected in sequence. Specifically, the secondary pressure shell 1 is fixedly connected with the pump body 13, the pump body 13 is fixedly connected with the connecting shell 17, and the connecting shell 17 is fixedly connected with the bearing box 24.
A pump shaft 5 is arranged in the secondary pressure shell 1, and a plurality of impellers 4 are mounted on the pump shaft 5; one end of the pump shaft 5 is provided with the suction end cover 2, and the other end is provided in the connection housing 17.
The suction end cover 2 is fixedly connected with the pump middle section shell 3, the number of the pump middle section shells 3 is multiple, and the pump middle section shells 3 are arranged in the secondary pressure shell 1; the number of the pump middle section shell 3 is consistent with that of the impellers 4. The middle section shell 3 forms a first layer of pressure-bearing shell outside the impeller 4.
Fig. 4 is a schematic structural view of the impeller. As shown in fig. 4, impeller 4 sets up axial and radial wheel hub slot, and ordinary impeller wheel hub hole is unthreaded hole and axle cooperation, and the installation cooperation region does not have the fluid circulation passageway, the utility model discloses an impeller is from taking axial circular arc slotted hole, can the circulation medium, radial arc groove and the formation circulation passageway of axle radial hole.
The impellers 4 can be divided into a front-section impeller set and a rear-section impeller set, a bearing body 8 is arranged between the front-section impeller set and the rear-section impeller set, and the bearing body 8 is fixedly connected with a first sliding bearing 7; the first sliding bearing 7 is in contact with the first thrust bearing 6, and the first thrust bearing 6 and the first sliding bearing 7 are respectively sleeved on the pump shaft 5.
A pump cover body is arranged on the rear surface of the pump body 13, and a static balance disc ring 11, a dynamic balance disc ring 12, a second thrust bearing 14 and a second sliding bearing 15 are arranged in the pump body 13; the static balance disc ring 11 is arranged on the pump cover body through a screw, and the dynamic balance disc ring 12 is positioned through a spigot and connected with the screw and arranged on the last-stage impeller 4; the second thrust bearing 14 and the second sliding bearing 15 are sleeved on the pump shaft 5, and the second thrust bearing 14 is in contact with the second sliding bearing 15; the second sliding bearing 15 is mounted on the pump cover body; an isolation sleeve assembly 16 is provided between the pump cap body and the connection housing 17. In addition, a first through rod 9 is arranged between the bearing body 8 and the pump body 13. A second penetrating rod 10 is arranged between the suction end cover 2 and the pump body 13; the second through-rod 10 passes through the bearing body 8.
An external magnetic drive assembly 18 is arranged in the connection housing 17, the external magnetic drive assembly 18 being, for example, an external magnetic ring. A third sliding bearing 19, a third thrust bearing 20, an inner magnetic rotor assembly 21 and a balance auxiliary impeller 22 are arranged in the outer magnetic drive assembly 18; the third sliding bearing 19, the third thrust bearing 20 and the inner magnetic rotor assembly 21 are respectively sleeved on the pump shaft 5, the third sliding bearing 19 is in contact with the third thrust bearing 20, and the third thrust bearing 20 is installed on the pump cover body; the balance sub-impeller 22 is mounted on the end of the pump shaft 5 via the inner magnetic rotor assembly 21.
A transmission shaft 26 is arranged in the bearing box body 24; the transmission shaft 26 is fixedly connected with the external magnetic drive assembly 18, and one end of the transmission shaft 26 close to the external magnetic drive assembly 18 is provided with a first rolling bearing 25, and the other end is provided with a second rolling bearing 29. And a constant-position oil cup 27 and an oil level indicator 28 which are communicated with the bearing box body 24 are respectively arranged outside the bearing box body. The constant position oil cup 27 and the oil level indicator 28 are distributed on both sides of the bearing housing 24. In the embodiment, a labyrinth seal assembly 23 is arranged on a front cover of a transmission shaft 26 and a bearing box body 24, the labyrinth seal assembly 23 is divided into a movable part and a static part, the movable part is connected with an external magnetic drive assembly 18, and the static part is connected with the bearing box body 24. A bearing isolator 30 is arranged at the rear end of the bearing box body 24, and a sealing ring is arranged in the bearing isolator 30 and is attached to the transmission shaft 26.
The utility model discloses a magnetic drive pump has axial and radial wheel hub slot according to self impeller structural feature, can high-pressure inner loop, safe and reliable. The special double-layer pressure-bearing shell structure is also suitable for the operating environment of high-temperature fluid conveying.
The utility model discloses the circulation in the interval of magnetic rotor subassembly 21 and separation sleeve subassembly 16 including the high-pressure medium that transmits the separation sleeve region to the pump end, produce high-speed swirl, including can set up separation sleeve head baffle between magnetic rotor subassembly 21 and separation sleeve subassembly 16, the high-speed fluid of effective control forms the cyclone, utilize the hou mian balanced auxiliary impeller 22 of inner magnetic rotor subassembly 21 to increase inner loop power simultaneously, improve the pressure head loss that fluid caused in the internal circulation, avoid inside production cavitation, thereby make inside formation force high-pressure inner loop, make the bearing obtain the lubrication, the eddy current loss heat energy that makes the magnetic drive coupler produce scatters and disappears fast. This embodiment is at the 16 outside intervals of isolation cover subassembly, adds secondary containment structure labyrinth seal subassembly 23, is equipped with relevant detecting instrument simultaneously, constitutes leakage monitoring system, makes the utility model discloses product safe and reliable can not lead to inefficacy because of the high pressure. The first rolling bearing 25 and the second rolling bearing 29 in the isolation sleeve and outside the pressure area filled with the medium work in a closed region formed by the bearing box body 24 and the bearing isolator 30, the support transmission shaft 26 and the external magnetic driving assembly 18 are lubricated by oil bath, the constant position oil cup 27 is supplied with lubricating oil, the bearing isolator 30 is equipped to effectively prevent the pollution of the external environment to the oil bath, and the reliable operation of the transmission system and the external magnetic driving assembly is ensured.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or some or all of the technical features may be equivalently replaced, without substantially departing from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A co-rotating impeller arrangement non-cantilevered magnetically driven pump, comprising: the secondary pressure shell (1), the pump body (13), the connecting shell (17) and the bearing box body (24) are fixedly connected in sequence;
a pump shaft (5) is arranged in the secondary pressure shell (1); one end of the pump shaft (5) is provided with a suction end cover (2), and the other end of the pump shaft is arranged in a connecting shell (17); a plurality of impellers (4) are arranged on the pump shaft (5);
the impellers (4) can be divided into a front-section impeller set and a rear-section impeller set, a bearing body (8) is arranged between the front-section impeller set and the rear-section impeller set, and the bearing body (8) is fixedly connected with a first sliding bearing (7); the first sliding bearing (7) is in contact with the first thrust bearing (6), and the first thrust bearing (6) and the first sliding bearing (7) are respectively sleeved on the pump shaft (5);
a pump cover body is arranged behind the pump body (13), and a static balance disc ring (11), a dynamic balance disc ring (12), a second thrust bearing (14) and a second sliding bearing (15) are arranged in the pump body (13); the static balance disc ring (11) is arranged on the pump cover body, and the dynamic balance disc ring (12) is arranged on the last-stage impeller (4); the second thrust bearing (14) and the second sliding bearing (15) are sleeved on the pump shaft (5), and the second thrust bearing (14) is in contact with the second sliding bearing (15); the second sliding bearing (15) is arranged on the pump cover body; an isolation sleeve assembly (16) is arranged between the pump cover body and the connecting shell (17);
an external magnetic driving assembly (18) is arranged in the connecting shell (17); a third sliding bearing (19), a third thrust bearing (20), an inner magnetic rotor component (21) and a balance auxiliary impeller (22) are arranged in the outer magnetic drive component (18); the third sliding bearing (19), the third thrust bearing (20) and the inner magnetic rotor assembly (21) are respectively sleeved on the pump shaft (5), the third sliding bearing (19) is contacted with the third thrust bearing (20), and the third thrust bearing (20) is arranged on the pump cover body; the balance auxiliary impeller (22) is arranged at the end part of the pump shaft (5) through the inner magnetic rotor assembly (21);
a transmission shaft (26) is arranged in the bearing box body (24); the transmission shaft (26) is fixedly connected with the external magnetic driving assembly (18).
2. The co-rotating impeller arrangement non-cantilevered magnetically driven pump according to claim 1, wherein the suction end cap (2) is fixedly connected to a midship pump casing (3), the number of midship pump casings (3) being plural, the midship pump casing (3) being disposed within the secondary pressure casing (1); the number of the pump middle section shell (3) is consistent with that of the impellers (4).
3. The non-cantilevered magnetically driven pump of claim 1, wherein the drive shaft (26) is provided with a first rolling bearing (25) at one end near the outer magnetic drive assembly (18) and a second rolling bearing (29) at the other end.
4. The co-rotating impeller arrangement non-cantilevered magnetically driven pump according to claim 3, wherein the bearing housing (24) is externally provided with a constant level oil cup (27) and a level indicator (28) in communication therewith, respectively; the constant-position oil cup (27) and the oil level indicator (28) are distributed on two sides of the bearing box body (24).
5. The co-rotating impeller arrangement non-cantilevered magnetically driven pump according to claim 1, characterized in that a first through-bar (9) is provided between the bearing body (8) and the pump body (13).
6. The co-rotating impeller arrangement non-cantilevered magnetically driven pump according to claim 1 or 5, characterized in that a second cross-bar (10) is provided between the suction end cap (2) and the pump body (13); the second through bar (10) penetrates through the bearing body (8).
7. The co-rotating impeller arrangement non-cantilevered magnetically driven pump according to claim 1, characterized in that a labyrinth seal assembly (23) is provided on the drive shaft (26) and the front cover of the bearing housing (24).
8. The co-rotating impeller arrangement non-cantilevered magnetically driven pump according to claim 1 or 7, wherein a bearing isolator (30) is provided at the rear end of the bearing housing (24), a sealing ring is built in the bearing isolator (30) to abut against the drive shaft (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021643499.5U CN212360201U (en) | 2020-08-10 | 2020-08-10 | Same-direction sequence impeller arrangement non-cantilever type magnetic force driving pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021643499.5U CN212360201U (en) | 2020-08-10 | 2020-08-10 | Same-direction sequence impeller arrangement non-cantilever type magnetic force driving pump |
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|---|---|
| CN212360201U true CN212360201U (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021643499.5U Active CN212360201U (en) | 2020-08-10 | 2020-08-10 | Same-direction sequence impeller arrangement non-cantilever type magnetic force driving pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810412A (en) * | 2020-08-10 | 2020-10-23 | 大连海密梯克泵业有限公司 | Same-direction sequence impeller arrangement non-cantilever type magnetic force driving pump |
-
2020
- 2020-08-10 CN CN202021643499.5U patent/CN212360201U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111810412A (en) * | 2020-08-10 | 2020-10-23 | 大连海密梯克泵业有限公司 | Same-direction sequence impeller arrangement non-cantilever type magnetic force driving pump |
| CN111810412B (en) * | 2020-08-10 | 2024-04-16 | 大连海密梯克泵业有限公司 | Non-cantilever magnetic drive pump with homodromous impeller arrangement |
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