CN220248378U - Submersible pump with sealed balancing device and submersible pump system - Google Patents
Submersible pump with sealed balancing device and submersible pump system Download PDFInfo
- Publication number
- CN220248378U CN220248378U CN202321957138.1U CN202321957138U CN220248378U CN 220248378 U CN220248378 U CN 220248378U CN 202321957138 U CN202321957138 U CN 202321957138U CN 220248378 U CN220248378 U CN 220248378U
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- sealing
- shaft sleeve
- shaft
- pump
- gland
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- 238000007789 sealing Methods 0.000 claims abstract description 147
- 210000004907 gland Anatomy 0.000 claims abstract description 52
- 239000003921 oil Substances 0.000 description 10
- 238000005299 abrasion Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000346 nonvolatile oil Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application discloses a submersible pump with sealed balancing unit, including the pump case and be formed with the power component of pivot, be formed with first through-hole on the pump case, the submersible pump still includes seal structure, gland and sealed axle sleeve cup joint in proper order in the pivot along the axial, are connected through seal structure between gland and the sealed axle sleeve, are formed with relative sealed first cavity between gland, sealed axle sleeve and the pivot, and the gland is covered and is still provided with the second through-hole, and the second through-hole communicates with first cavity and first through-hole respectively. The second chamber of the oil-submerged pump is a high-pressure area, the first chamber is a low-pressure area, and resultant force formed by pressure difference between the first chamber and the second chamber can apply an upward force to the sealing shaft sleeve, and the force can be conducted to the whole rotor formed by the rotating shaft, the impeller and the like to offset downward axial force born by the rotor.
Description
Technical Field
The utility model relates to the technical field of oil-submerged pumps, in particular to an oil-submerged pump with a sealed balance device and an oil-submerged pump system.
Background
The oil-submerged pump is widely applied to oil discharge of railway tank trucks and fixed oil tanks, and the weight of the rotor and the pressure of an impeller outlet are larger than the pressure of an impeller inlet, so that the rotor generates an axial force always pointing to the inlet in the operation process, especially the multistage high-lift oil-submerged pump, and the rotor is forced to axially run by the force in the operation process, friction is generated between the rotor and fixed parts, and the pump cannot work normally unless the axial force is eliminated or balanced.
The conventional methods for balancing axial force of the submersible pump are as follows:
firstly, thrust bearings are adopted to balance axial force, but because the diameter of a pump body is smaller due to the limitation of the caliber of tank openings of a tank truck and an oil tank, a larger thrust bearing cannot be selected to balance enough axial force; and the balance holes, the balance disc or the balance drum are adopted to balance the axial force, and the axial force is balanced by the pressure drop generated by medium leakage, so that a part of energy is lost due to leakage, irreparable abrasion is generated after long-term operation, and the pump performance is reduced without energy conservation.
Disclosure of Invention
The present utility model is directed to at least overcoming one of the above problems, and provides an oil-submerged pump and an oil-submerged pump system provided with a sealed balance device.
The technical scheme adopted by the utility model is as follows:
the application provides a submersible pump with a sealed balance device, which comprises a pump shell and a power element which is arranged in the pump shell and is provided with a rotating shaft,
the pump shell is provided with a first through hole communicated with the outside,
the oil-submerged pump further comprises a sealing structural part, a sealing gland and a sealing shaft sleeve, wherein the sealing gland and the sealing shaft sleeve are sequentially sleeved on the rotating shaft along the axial direction, the sealing gland is connected with the sealing shaft sleeve through the sealing structural part, a first cavity which is sealed relatively is formed among the sealing gland, the sealing shaft sleeve and the rotating shaft, a second through hole is further formed in the sealing gland, and the second through hole is respectively communicated with the first cavity and the first through hole;
the oil-submerged pump further comprises an impeller fixed at the shaft end of the rotating shaft, a guide vane and a positioning shaft sleeve arranged between the impeller and the sealing shaft sleeve, wherein the guide vane is arranged at the periphery of the impeller, one end of the positioning shaft sleeve is abutted against the impeller, and the other end of the positioning shaft sleeve is abutted against the sealing shaft sleeve; and a second chamber is formed among the guide vane, the sealing shaft sleeve, the sealing gland and the positioning shaft sleeve.
When the oil-submerged pump actually works, a second chamber is formed among the guide vane, the sealing shaft sleeve, the sealing gland and the positioning shaft sleeve, and the second chamber is a high-pressure area. By arranging a first chamber in the submersible pump which is communicated with a medium or the atmosphere outside the pump shell, the pressure inside the first chamber is extremely low relative to the high-pressure area, namely the first chamber is a low-pressure area relative to the second chamber, and the resultant force formed by the pressure difference between the first chamber and the second chamber can apply an upward force to the sealing shaft sleeve, and the force can be transmitted to the whole rotor formed by the rotating shaft, the impeller and the like so as to offset the downward axial force born by the rotor. And because the sealing gland and the sealing shaft sleeve are in sealing connection, medium leakage is not generated, energy is not lost due to leakage, irreparable abrasion is not generated during long-term operation, the whole equipment is energy-saving in operation, and the performance of the pump can be kept stable.
The positioning shaft sleeve is used for assisting the key to complete the axial positioning of the sealing shaft sleeve.
Further, the sealing structural member is a mechanical seal, a first annular boss is formed on one side, close to the sealing shaft sleeve, of the sealing gland, a second annular boss is formed on one side, close to the sealing gland, of the sealing shaft sleeve, one end of the mechanical seal is sleeved on the second annular boss of the sealing shaft sleeve in a sleeved mode, and the other end of the mechanical seal is sleeved on the first annular boss of the sealing gland in a sleeved mode.
The mechanical seal is reliable, convenient to install and beneficial to saving the cost, and the mechanical seal is provided with a spring and has the capacity of compensating abrasion, so that the oil-submerged pump provided with the device is energy-saving and reliable.
Further, the periphery of the sealing gland is in sealing connection with the pump shell through a first sealing ring, and one end, far away from the sealing shaft sleeve, of the sealing gland is in sealing connection with the power element through a second sealing ring.
The first sealing ring is used for preventing leakage between the periphery of the sealing gland and the pump shell, and the second sealing ring is used for preventing leakage between one end, far away from the sealing shaft sleeve, of the sealing gland and the power element.
Further, the rotating shaft is provided with a shaft shoulder; the sealing shaft sleeve is correspondingly provided with a stepped hole, and the stepped hole is matched with the shaft shoulder to clamp the sealing shaft sleeve on the rotating shaft.
When the resultant force formed by the pressure difference between the first chamber and the second chamber applies an upward force to the sealing shaft sleeve, the force is transmitted to the rotating shaft through the shaft shoulder, and the shaft shoulder is used for maximally transmitting the force to the whole rotor formed by the rotating shaft, the impeller and the like, so as to offset the downward axial force born by the rotor.
Further, the sealing shaft sleeve is connected with the rotating shaft of the power element through a key, the key is arranged on the small shaft of the shaft shoulder, a third sealing ring is further arranged between the sealing shaft sleeve and the rotating shaft of the power element, and the third sealing ring is arranged on the large shaft of the shaft shoulder.
The third sealing ring is used for preventing leakage between the sealing shaft sleeve and the rotating shaft of the power element.
Further, the rotating shaft is connected with the impeller through a key.
Further, the sealing pressure cover is also provided with a flow passage, and the flow passage is used for allowing a medium thrown out by the impeller to pass through.
The application also provides an oil-submerged pump system, which comprises an oil-submerged pump, an oil tank, a connecting pipeline and a medium arranged in the oil tank, wherein the oil-submerged pump is provided with the sealed balance device;
the oil-submerged pump is provided with an inlet and an outlet, the outlet is communicated with the connecting pipeline, the oil-submerged pump is arranged in the oil tank, and the inlet is arranged in the medium.
In actual practice, the oil-submerged pump is arranged in the oil tank, when the oil-submerged pump starts to work, the medium is sucked from the inlet of the oil-submerged pump and pumped out through the connecting pipeline, and the second chamber of the oil-submerged pump is a high-pressure area; the first chamber is communicated with the medium and is a low-pressure area relative to the second chamber, so that resultant force formed by pressure difference between the first chamber and the second chamber can apply an upward force to the sealing shaft sleeve, and the force can be transmitted to the whole rotor formed by the rotating shaft, the impeller and the like to offset downward axial force born by the rotor.
The beneficial effects of the utility model are as follows:
(1) By arranging a first chamber in the submersible pump which is communicated with a medium or the atmosphere outside the pump shell, the pressure inside the first chamber is extremely low relative to the high-pressure area, namely the first chamber is a low-pressure area relative to the second chamber, and the resultant force formed by the pressure difference between the first chamber and the second chamber can apply an upward force to the sealing shaft sleeve, and the force can be transmitted to the whole rotor formed by the rotating shaft, the impeller and the like so as to offset the downward axial force born by the rotor. And because the sealing gland and the sealing shaft sleeve are in sealing connection, medium leakage is not generated, energy is not lost due to leakage, irreparable abrasion is not generated during long-term operation, the whole equipment is energy-saving in operation, and the performance of the pump can be kept stable.
(2) The mechanical seal is reliable, convenient to install and beneficial to saving the cost, and the mechanical seal is provided with a spring and has the capacity of compensating abrasion, so that the oil-submerged pump provided with the device is energy-saving and reliable.
(3) The shaft shoulder is used for maximally transmitting the force to the whole rotor formed by the rotating shaft, the impeller and the like, so as to offset the downward axial force born by the rotor.
(4) The first sealing ring, the second sealing ring and the third sealing ring are respectively more effectively used for preventing the medium from leaking from the first chamber.
Drawings
FIG. 1 is a schematic view of a sectional structure of an oil-submerged pump in a front view according to an embodiment of the present utility model;
FIG. 2 is a schematic view of a partial sectional structure of a submersible pump according to an embodiment of the utility model;
FIG. 3 is a schematic view of a cross-sectional structure of a seal gland according to an embodiment of the present utility model in a front view;
FIG. 4 is a schematic top view of a gland according to an embodiment of the present utility model;
fig. 5 is a schematic diagram of the structure of the submersible pump system (actual use of the submersible pump) according to the embodiment of the utility model.
The reference numerals in the drawings are as follows:
1. a pump housing; 101. a first through hole; 2. a power element; 21. a rotating shaft; 22. a shaft shoulder; 3. sealing the structural member; 4. a sealing gland; 41. a second through hole; 42. a first annular boss; 43. a flow passage; 5. sealing the shaft sleeve; 51. a second annular boss; 52. a stepped hole; 6. a first seal ring; 7. a second seal ring; 8. a third seal ring; 9. an impeller; 10. positioning the shaft sleeve; 11. a first chamber; 12. a second chamber; 13. a guide vane; 100. a submersible pump; 110. an inlet; 120. an outlet; 200. an oil tank; 300. a connecting pipeline; 400. a medium.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 4, the present application provides a submersible pump provided with a sealed type balancing device, comprising a pump housing 1 and a power element 2 provided in the pump housing 1 and formed with a rotation shaft 21,
the pump housing 1 is formed with a first through hole 101 communicating with the outside,
the oil-submerged pump further comprises a sealing structural member 3, a sealing gland 4 and a sealing shaft sleeve 5, wherein the sealing gland 4 and the sealing shaft sleeve 5 are sequentially sleeved on the rotating shaft 21 along the axial direction, the sealing gland 4 and the sealing shaft sleeve 5 are connected through the sealing structural member 3, a first cavity 11 which is sealed relatively is formed among the sealing gland 4, the sealing shaft sleeve 5 and the rotating shaft 21, a second through hole 41 is further formed in the sealing gland 4, and the second through hole 41 is respectively communicated with the first cavity 11 and the first through hole 101;
the oil-submerged pump also comprises an impeller 9 fixed at the shaft end of the rotating shaft 21 and a positioning shaft sleeve 10 arranged between the impeller 9 and the sealing shaft sleeve 5, wherein one end of the positioning shaft sleeve 10 is abutted against the impeller 9, and the other end is abutted against the sealing shaft sleeve 5.
The positioning sleeve 10 is used for assisting the key to complete the axial positioning of the sealing sleeve 5.
The oil-submerged pump further comprises a guide vane 13, wherein the guide vane 13 is arranged on the periphery of the impeller 9, and a second chamber 12 is formed among the guide vane 13, the sealing shaft sleeve 5, the sealing gland 4 and the positioning shaft sleeve 10.
When the oil-submerged pump actually works, a second chamber 12 is formed among the guide vane 13, the sealing shaft sleeve 5, the sealing gland 4 and the positioning shaft sleeve 10, and the second chamber 12 is a high-pressure area. By providing a first chamber 11 in the submersible pump which is in communication with the medium or atmosphere outside the pump housing 1, the pressure inside the first chamber 11 is very low relative to the high pressure area, i.e. the first chamber 11 is at a low pressure area relative to the second chamber 12, the resultant force of the pressure differences between the first chamber 11 and the second chamber 12 will exert an upward force on the sealing sleeve 5, which force can be conducted to the whole rotor consisting of the shaft 21 and the impeller 9, etc., to counteract the downward axial force experienced by the rotor. In addition, as the sealing gland 4 is in sealing connection with the sealing shaft sleeve 5, medium leakage is not generated, energy is not lost due to leakage, irreparable abrasion is not generated during long-term operation, the whole equipment is energy-saving in operation, and the performance of the pump can be kept stable.
In this embodiment, the sealing structure 3 is a mechanical seal, a first annular boss 42 is formed on one side of the sealing gland 4 close to the sealing shaft sleeve 5, a second annular boss 51 is formed on one side of the sealing shaft sleeve 5 close to the sealing gland 4, one end of the mechanical seal is sleeved on the second annular boss 51 of the sealing shaft sleeve 5, and the other end is sleeved on the first annular boss 42 of the sealing gland 4.
The mechanical seal is reliable, convenient to install and beneficial to saving the cost, and the mechanical seal is provided with a spring and has the capacity of compensating abrasion, so that the oil-submerged pump provided with the device is energy-saving and reliable.
In other embodiments, the sealing structure 3 may be other structures that can seal between the sealing gland 4 and the sealing sleeve 5.
In this embodiment, the outer periphery of the sealing gland 4 is in sealing connection with the pump casing 1 through a first sealing ring 6, and one end of the sealing gland 4, which is far away from the sealing shaft sleeve 5, is in sealing connection with the power element 2 through a second sealing ring 7.
The first seal ring 6 is used for preventing leakage between the periphery of the seal gland 4 and the pump shell 1, and the second seal ring 7 is used for preventing leakage between the end, away from the seal shaft sleeve 5, of the seal gland 4 and the power element 2.
In the present embodiment, the rotating shaft 21 has a shoulder 22; the sealing shaft sleeve 5 is correspondingly provided with a stepped hole 52, and the stepped hole 52 is matched with the shaft shoulder 22 to clamp the sealing shaft sleeve 5 on the rotating shaft 21.
When the resultant force formed by the pressure difference between the first chamber 11 and the second chamber 12 applies an upward force to the sealing sleeve 5, the force is transferred to the rotating shaft 21 through the shaft shoulder 22, and the shaft shoulder 22 is used for maximally transmitting the force to the whole rotor formed by the rotating shaft 21, the impeller 9 and the like, so as to offset the downward axial force born by the rotor.
In this embodiment, the sealing sleeve 5 is connected with the rotating shaft 21 of the power element 2 by a key, the key is arranged on the small shaft of the shaft shoulder 22, a third sealing ring 8 is further arranged between the sealing sleeve 5 and the rotating shaft 21 of the power element 2, and the third sealing ring 8 is arranged on the large shaft of the shaft shoulder 22.
The third seal ring 8 is used to prevent leakage between the seal bushing 5 and the rotating shaft 21 of the power element 2.
In this embodiment, the shaft 21 is keyed to the impeller 9.
As shown in fig. 1, 3 and 4, in this embodiment, the sealing gland 4 is further provided with a flow channel 43, and the flow channel 43 is used for passing the medium thrown out by the impeller 9.
In this embodiment, three flow passages 43 are provided on the sealing gland 4, a reinforcing connection plate is provided between the flow passages 43, and the second through holes 41 are provided inside the connection plate.
As shown in fig. 1 and 5, the present application further provides a system of a submersible pump 100, which includes a submersible pump 100, an oil tank 200, a connecting pipeline 300, and a medium 400 disposed inside the oil tank 200, wherein the submersible pump 100 is a submersible pump 100 provided with a sealed balancing device as described above;
the submersible pump 100 has an inlet 110 and an outlet 120, the outlet 120 being in communication with the connecting line 300, the submersible pump 100 being disposed within the tank 200, the inlet 110 being disposed in the medium 400.
In actual use, the submersible pump 100 is placed in the oil tank 200, and when the submersible pump 100 starts to operate, the medium 400 is sucked from the inlet 110 of the submersible pump 100 and pumped out through the connecting pipeline 300, and the second chamber 12 of the submersible pump 100 is a high-pressure area; the first chamber 12 is in a low pressure area opposite to the second chamber 11, which is communicated with the medium 400, so that the resultant force formed by the pressure difference between the first chamber 11 and the second chamber 12 can apply an upward force to the sealing shaft sleeve 5, and the force can be transmitted to the whole rotor formed by the rotating shaft 21, the impeller 9 and the like to offset the downward axial force born by the rotor.
The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover all equivalent structures as modifications within the scope of the utility model, either directly or indirectly, as may be contemplated by the present utility model.
Claims (8)
1. An oil-submerged pump with a sealed balance device comprises a pump shell and a power element which is arranged in the pump shell and is provided with a rotating shaft, and is characterized in that,
the pump shell is provided with a first through hole communicated with the outside,
the oil-submerged pump further comprises a sealing structural part, a sealing gland and a sealing shaft sleeve, wherein the sealing gland and the sealing shaft sleeve are sequentially sleeved on the rotating shaft along the axial direction, the sealing gland is connected with the sealing shaft sleeve through the sealing structural part, a first cavity which is sealed relatively is formed among the sealing gland, the sealing shaft sleeve and the rotating shaft, a second through hole is further formed in the sealing gland, and the second through hole is respectively communicated with the first cavity and the first through hole;
the oil-submerged pump further comprises an impeller fixed at the shaft end of the rotating shaft, a guide vane and a positioning shaft sleeve arranged between the impeller and the sealing shaft sleeve, wherein the guide vane is arranged at the periphery of the impeller, one end of the positioning shaft sleeve is abutted against the impeller, and the other end of the positioning shaft sleeve is abutted against the sealing shaft sleeve; and a second chamber is formed among the guide vane, the sealing shaft sleeve, the sealing gland and the positioning shaft sleeve.
2. The submersible pump with the sealed balancing device according to claim 1, wherein the sealing structural member is a mechanical seal, a first annular boss is formed on one side of the sealing gland close to the sealing shaft sleeve, a second annular boss is formed on one side of the sealing shaft sleeve close to the sealing gland, one end of the mechanical seal is sleeved on the second annular boss of the sealing shaft sleeve in an sleeved mode, and the other end of the mechanical seal is sleeved on the first annular boss of the sealing gland in an sleeved mode.
3. The submersible pump with the sealed balancing device according to claim 1, wherein the periphery of the sealing gland is in sealing connection with the pump shell through a first sealing ring, and one end of the sealing gland, which is far away from the sealing shaft sleeve, is in sealing connection with the power element through a second sealing ring.
4. The submersible pump with a sealed balancing device according to claim 1, wherein the rotating shaft has a shoulder; the sealing shaft sleeve is correspondingly provided with a stepped hole, and the stepped hole is matched with the shaft shoulder to clamp the sealing shaft sleeve on the rotating shaft.
5. The submersible pump with the sealed balancing device according to claim 4, wherein the sealing shaft sleeve is connected with the rotating shaft key of the power element, the key is arranged on the small shaft of the shaft shoulder, a third sealing ring is further arranged between the sealing shaft sleeve and the rotating shaft of the power element, and the third sealing ring is arranged on the large shaft of the shaft shoulder.
6. A submersible pump with a sealed balancing device according to claim 1, wherein the shaft is keyed to the impeller.
7. The submersible pump with a sealed balancing device according to claim 1, wherein the sealed pressure cover is further provided with a flow passage for passing the medium thrown out by the impeller.
8. A submersible pump system, characterized by comprising a submersible pump, an oil tank, a connecting pipeline and a medium arranged in the oil tank, wherein the submersible pump is provided with a sealed balance device according to any one of claims 1 to 7;
the oil-submerged pump is provided with an inlet and an outlet, the outlet is communicated with the connecting pipeline, the oil-submerged pump is arranged in the oil tank, and the inlet is arranged in the medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321957138.1U CN220248378U (en) | 2023-07-24 | 2023-07-24 | Submersible pump with sealed balancing device and submersible pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321957138.1U CN220248378U (en) | 2023-07-24 | 2023-07-24 | Submersible pump with sealed balancing device and submersible pump system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220248378U true CN220248378U (en) | 2023-12-26 |
Family
ID=89264372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321957138.1U Active CN220248378U (en) | 2023-07-24 | 2023-07-24 | Submersible pump with sealed balancing device and submersible pump system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220248378U (en) |
-
2023
- 2023-07-24 CN CN202321957138.1U patent/CN220248378U/en active Active
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