CN217002301U - Novel horizontal shielding centrifugal pump - Google Patents
Novel horizontal shielding centrifugal pump Download PDFInfo
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- CN217002301U CN217002301U CN202220472535.9U CN202220472535U CN217002301U CN 217002301 U CN217002301 U CN 217002301U CN 202220472535 U CN202220472535 U CN 202220472535U CN 217002301 U CN217002301 U CN 217002301U
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Abstract
The utility model relates to the technical field of shielded centrifugal pumps, in particular to a novel horizontal shielded centrifugal pump, which comprises a pump body and a shielded motor, wherein the pump body and the shielded motor are arranged on a horizontal base, the front end of the pump body is connected with a pump cover, a pressurizing three-cavity bearing bracket is connected between the pump cover and the shielded motor, a pump shaft is rotatably supported in the pressurizing three-cavity bearing bracket through a first bearing and a second bearing respectively, a sealing cavity is arranged at the center of the pump cover, a shaft sleeve and a mechanical seal are arranged in the sealing cavity, the shaft sleeve is sleeved outside the pump shaft, and the mechanical seal is sleeved outside the shaft sleeve; and the pressurizing three-cavity bearing bracket is connected with a lubricating oil circulating pipeline. According to the utility model, the pressurizing three-cavity bearing bracket is connected between the pump cover and the shielding motor, the pressure of lubricating oil in the pressurizing cavity is higher than that of the sealing cavity, so that medium leakage can be prevented, and the medium leakage phenomenon generated when the dynamic seal of the mechanical seal of the existing shielding centrifugal pump rotates along with the shaft is solved.
Description
Technical Field
The utility model relates to the technical field of shielded centrifugal pumps, in particular to a novel horizontal shielded centrifugal pump.
Background
Petrochemical enterprises, the mobile equipment of common transport medium is the shielding centrifugal pump in the device production operation in-process, this is because the production environment of enterprise is poisonous harmful inflammable and explosive, and the medium is revealed and is very easily caused accident, environmental pollution and personnel's injury, so safety, environmental protection work require extremely high.
The existing shielded centrifugal pump connects the pump and the motor together, the rotor of the motor and the impeller of the pump are fixed on the same shaft, the rotor of the motor and the stator are separated by the shielding sleeve, the rotor runs in the conveyed medium, the power is transmitted by the magnetic field of the stator, and the bearing is lubricated by the medium, so that no lubricating system exists, and the lubricating effect depends on the lubricating property of the medium. Therefore, the existing shield centrifugal pump has the following requirements in use:
1) the conveying medium has good lubricating property, and the viscosity of the medium is 0.1-20 mPa.s, which is generally suitable for shielding centrifugal pumps;
2) the conveying medium is clean and has no impurities;
3) the efficiency of the shielded centrifugal pump is low, and the shielded centrifugal pump generates heat and evaporates liquid, so that the pump rotates dry, and a sliding bearing is damaged.
Therefore, the existing shield centrifugal pump has high requirements on working environment and media and has poor effect of conveying high-temperature media.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a novel horizontal type shielding centrifugal pump.
In order to achieve the purpose, the technical scheme of the utility model is as follows: the utility model provides a novel horizontal shielded centrifugal pump, includes the pump body, canned motor, the pump body is installed on horizontal base with canned motor, its characterized in that: the pump cover is connected to the front end of the pump body, a pressurizing three-cavity bearing bracket is connected between the pump cover and the shield motor, a pump shaft is rotatably supported in the pressurizing three-cavity bearing bracket through a first bearing and a second bearing respectively, a motor shaft of the shield motor is connected with the front end of the pump shaft through a coupling, the tail end of the pump shaft is connected with the pump body, a sealing cavity is arranged at the center of the pump cover, a shaft sleeve and a mechanical seal are arranged in the sealing cavity, the shaft sleeve is sleeved outside the pump shaft, the mechanical seal is sleeved outside the shaft sleeve, and the mechanical seal is fixed on the pump cover through a mechanical seal gland;
the second bearing is close to the shielding motor, the first bearing is positioned between the pump cover and the second bearing, a helical gear is fixedly sleeved outside the pump shaft, the helical gear is positioned between the first bearing and the shaft sleeve, a gear sleeve is sleeved outside the helical gear, the gear sleeve is fixed on the inner wall of the pressurizing three-cavity bearing bracket, a cooling cavity is arranged in the wall of the pressurizing three-cavity bearing bracket, the inside of the pressurizing three-cavity bearing bracket is partitioned into a pressurizing cavity and a lubricating cavity through the first bearing, the helical gear is positioned in the pressurizing cavity, the second bearing is positioned in the lubricating cavity, a plurality of first flow through holes are formed in the inner wall of the pressurizing three-cavity bearing bracket, the first flow through holes are communicated with the pressurizing cavity and the lubricating cavity, and the pressurizing three-cavity bearing bracket is provided with an oil filling port;
the pressurizing three-cavity bearing bracket is connected with a lubricating oil circulating pipeline, one end of the lubricating oil circulating pipeline is communicated with the pressurizing cavity, and the other end of the lubricating oil circulating pipeline is communicated with the shielding motor.
Further, the method comprises the following steps of; the helical gear is fixedly sleeved on the pump shaft through a key, a positioning sleeve and a clamp spring.
Further, the step of; the second bearing inner ring is fixed on the pump shaft through a locking nut, and the second bearing outer ring is fixed on the inner wall of the pressurizing three-cavity bearing bracket through a bearing compression ring.
Further, the method comprises the following steps of; the lubricating cavity is divided into a front cavity and a rear cavity by the second bearing, a plurality of second flow through holes are formed in the inner wall of the pressurizing three-cavity bearing bracket, and the second flow through holes are communicated with the front cavity and the rear cavity of the lubricating cavity.
Further, the method comprises the following steps of; and a filter is arranged on the lubricating oil circulation pipeline.
Further, the method comprises the following steps of; and a pressure gauge, an energy accumulator and a manual booster pump are arranged on the lubricating oil circulating pipeline.
Further, the method comprises the following steps of; and the lower end of the lubricating oil circulating pipeline is provided with an emptying and pressure relief drain outlet.
The utility model has the beneficial effects that:
(1) the pressurizing three-cavity bearing bracket is connected between the pump cover and the shielding motor, so that the pressure of lubricating oil in the pressurizing cavity is higher than that of the sealing cavity, the medium leakage can be prevented, and the problem that the conventional shielding centrifugal pump has a fault phenomenon caused by the influence of medium viscosity, sundries, corrosion and unstable medium when a rotor runs in the conveyed medium is solved.
(2) The pressurizing three-cavity bearing bracket is fixedly connected with the pump cover and the shielding motor through bolts, so that the maintenance and troubleshooting are more convenient.
(3) The pressurizing three-cavity bearing bracket is internally composed of a pressurizing cavity, a lubricating cavity and a cooling cavity, cooling water in the cooling cavity cools lubricating oil in the pressurizing cavity and the lubricating cavity, the lubricating oil in the pressurizing cavity and the lubricating cavity realizes the lubrication and cooling of the mechanical seal and the first bearing and the second bearing, a conveying medium is not needed for lubrication, the lubricating performance of the conveying medium is not required, and the conveying of a small-flow and high-temperature medium can be realized.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of A in FIG. 1;
FIG. 3 is an enlarged schematic view of B of FIG. 1;
fig. 4 is an enlarged schematic view of C in fig. 1.
In the figure: 1. an impeller lock nut; 2. a pump body; 3. an impeller; 4. a pump cover; 5. a pressurized three-cavity bearing bracket; 6. a pump shaft; 7. shielding the motor; 8. a horizontal base; 9. an oil filler; 10. mechanical sealing; 11. a mechanical seal gland; 12. a shaft sleeve; 13. a gear sleeve; 14. a first flow through hole; 15. a first bearing; 16. a positioning sleeve; 17. a key; 18. a helical gear; 19. a clamp spring; 20. a second flow through hole; 21. a bearing is pressed; 22. a second bearing; 23. locking the nut; 24. a filter; 25. a pressure gauge; 26. an accumulator; 27. a manual booster pump; 28. a lube oil circulation line; 29. a pressurizing cavity; 30. a lubrication chamber; 31. a cooling chamber; 32. sealing the cavity; 33. and (5) emptying the pressure relief sewage outlet.
Detailed Description
To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.
Example (b):
as shown in fig. 1 to 4, a novel horizontal shielded centrifugal pump comprises a pump body 2 and a shielded motor 7, wherein the pump body 2 and the shielded motor 7 are installed on a horizontal base 8, the front end of the pump body 2 is connected with a pump cover 4, the pump cover 4 and the shielded motor 7 are fixedly connected with a pressurizing three-cavity bearing bracket 5 through bolts, a pump shaft 6 is rotatably supported in the pressurizing three-cavity bearing bracket 5 through a first bearing 15 and a second bearing 22, a motor shaft of the shielded motor 7 is connected with the front end of the pump shaft 6 through a coupling, the tail end of the pump shaft 6 passes through the pump cover 4 to be connected with an impeller 3 in the pump body 2, the impeller 3 is fixed on the pump shaft 6 through an impeller locking nut 1 and conveys media along with the rotation of the pump shaft 6, a sealing cavity 32 is arranged at the center of the pump cover 4, a shaft sleeve 12 and a mechanical seal 10 are arranged in the sealing cavity 32, the shaft sleeve 12 is sleeved outside the pump shaft 6, the mechanical seal 10 is sleeved outside the shaft sleeve 12, and the mechanical seal 10 is fixed on the pump cover 4 through a mechanical seal gland 11.
The second bearing 22 is close to the shield motor 7, the first bearing 15 is positioned between the pump cover 4 and the second bearing 22, a helical gear 18 is fixedly sleeved outside the pump shaft 6, the helical gear 18 is positioned between the first bearing 15 and the shaft sleeve 12, the helical gear 18 is externally sleeved with a gear sleeve 13, the gear sleeve 13 is fixed on the inner wall of the pressurization three-cavity bearing bracket 5, a cooling cavity 31 is arranged in the wall of the three-cavity pressurized bearing bracket 5, the inside of the three-cavity pressurized bearing bracket 5 is separated into a pressurized cavity 29 and a lubricating cavity 30 through a first bearing 15, the helical gear 18 is located in the pressurizing chamber 29, the second bearing 22 is located in the lubricating chamber 30, a plurality of first through holes 14 are arranged on the inner wall of the pressurization three-cavity bearing bracket 5, the first through holes 14 are communicated with a pressurization cavity 29 and a lubrication cavity 30, the pressurization three-cavity bearing bracket 5 is provided with an oil filling port 9, and the oil filling port 9 is communicated with a pressurization cavity 29;
the pressurizing three-cavity bearing bracket 5 is connected with a lubricating oil circulating pipeline 28, one end of the lubricating oil circulating pipeline 28 is communicated with the pressurizing cavity 29, and the other end of the lubricating oil circulating pipeline is communicated with the shielding motor 7.
In a preferred embodiment, the bevel gear 18 is fixedly sleeved on the pump shaft 6 through a key 17, a positioning sleeve 16 and a clamp spring 19.
In this embodiment, preferably, the inner ring of the second bearing 22 is fixed on the pump shaft 6 through a lock nut 23, and the outer ring of the second bearing 22 is fixed on the inner wall of the three-cavity pressurized bearing bracket 5 through a bearing compression ring 21.
In the preferred embodiment, the lubrication cavity 30 is divided into a front cavity and a rear cavity by the second bearing 22, the inner wall of the pressurized three-cavity bearing bracket 5 is provided with a plurality of second through holes 20, and the second through holes 20 communicate with the front cavity and the rear cavity of the lubrication cavity 30.
In the preferred embodiment, the lubricating oil circulating pipeline 28 is provided with a filter 24, a pressure gauge 25, an accumulator 26 and a manual booster pump 27, and the lower end of the lubricating oil circulating pipeline 28 is provided with an emptying pressure relief drain outlet 33.
The working principle is as follows: firstly, lubricating oil is filled in the pressurizing cavity 29 and the lubricating cavity 30 through the oil filling port 9, then the manual pressurizing pump 27 is opened to increase the oil pressure in the pressurizing cavity 29 and the lubricating cavity 30, the pressure is higher than that in the sealing cavity 32, and the medium can be prevented from leaking to play a safety protection role. And cooling water is introduced into the cooling cavity 31 to cool the lubricating oil, the shielding motor 7 is started, the pump shaft 6 rotates to drive the impeller 3 to rotate and convey media, the helical gear 18 is driven to rotate when the pump shaft 6 rotates to form a lubricating oil pressurizing body, and the lubricating oil in the lubricating cavity 30 is sucked into the pressurizing cavity 29 through the first circulation hole 14 and the first bearing 15 to lubricate and cool the mechanical seal 10. Lubricating oil in the pressurizing cavity 29 is pressurized and then enters the lubricating oil circulating pipeline 28, is filtered by the filter 24 and flows back to the lubricating cavity 30 through the shielding motor 7 to form closed circulation, and the bearing in the shielding motor 7 is lubricated and cooled in the circulation process, and meanwhile, the rotor and the stator are cooled. The pressure gauge 25 is used for observing the oil pressure of the lubricating oil and determining whether the mechanical seal 10 leaks. The accumulator 26 is used to stabilize the lubrication oil circulation system.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the utility model as set forth in the appended claims.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Claims (7)
1. The utility model provides a novel horizontal shielded centrifugal pump, includes the pump body (2), canned motor (7), install on horizontal base (8) its characterized in that pump body (2) and canned motor (7): the pump comprises a pump body (2), a pump cover (4) is connected to the front end of the pump body (2), a pressurizing three-cavity bearing bracket (5) is connected between the pump cover (4) and a shielding motor (7), a pump shaft (6) is rotatably supported in the pressurizing three-cavity bearing bracket (5) through a first bearing (15) and a second bearing (22), the motor shaft of the shielding motor (7) is connected with the front end of the pump shaft (6), the tail end of the pump shaft (6) is connected with the pump body (2), a sealing cavity (32) is arranged at the center of the pump cover (4), a shaft sleeve (12) and a mechanical seal (10) are arranged in the sealing cavity (32), the shaft sleeve (12) is sleeved outside the pump shaft (6), the mechanical seal (10) is sleeved outside the shaft sleeve (12), and the mechanical seal (10) is fixed on the pump cover (4) through a mechanical seal gland (11);
the pump is characterized in that the second bearing (22) is close to the shielding motor (7), the first bearing (15) is positioned between the pump cover (4) and the second bearing (22), the outer part of the pump shaft (6) is fixedly sleeved with the helical gear (18), the helical gear (18) is positioned between the first bearing (15) and the shaft sleeve (12), the outer part of the helical gear (18) is sleeved with the gear sleeve (13), the gear sleeve (13) is fixed on the inner wall of the charging three-cavity bearing bracket (5), the wall of the charging three-cavity bearing bracket (5) is internally provided with the cooling cavity (31), the inner part of the charging three-cavity bearing bracket (5) is separated into a charging cavity (29) and a lubricating cavity (30) through the first bearing (15), the helical gear (18) is positioned in the charging cavity (29), the second bearing (22) is positioned in the lubricating cavity (30), the inner wall of the charging three-cavity bearing bracket (5) is provided with a plurality of first flow through holes (14), the first flow through hole (14) is communicated with a pressurizing cavity (29) and a lubricating cavity (30), and the pressurizing three-cavity bearing bracket (5) is provided with an oil filling port (9);
the pressurizing three-cavity bearing bracket (5) is connected with a lubricating oil circulating pipeline (28), one end of the lubricating oil circulating pipeline (28) is communicated with the pressurizing cavity (29), and the other end of the lubricating oil circulating pipeline is communicated with the shielding motor (7).
2. The novel horizontal shielded centrifugal pump of claim 1, wherein: the bevel gear (18) is fixedly sleeved on the pump shaft (6) through a key (17), a positioning sleeve (16) and a clamp spring (19).
3. The novel horizontal shielded centrifugal pump of claim 1, wherein: the inner ring of the second bearing (22) is fixed on the pump shaft (6) through a locking nut, and the outer ring of the second bearing (22) is fixed on the inner wall of the pressurizing three-cavity bearing bracket (5) through a bearing compression ring (21).
4. The novel horizontal shielded centrifugal pump of claim 1, wherein: the lubricating cavity (30) is divided into a front cavity and a rear cavity by a second bearing (22), a plurality of second through flow holes (20) are formed in the inner wall of the pressurization three-cavity bearing bracket (5), and the second through flow holes (20) are communicated with the front cavity and the rear cavity of the lubricating cavity (30).
5. The novel horizontal shielded centrifugal pump of claim 1, wherein: and a filter (24) is arranged on the lubricating oil circulating pipeline (28).
6. The novel horizontal shielded centrifugal pump of claim 1, wherein: and a pressure gauge (25), an energy accumulator (26) and a manual booster pump (27) are arranged on the lubricating oil circulating pipeline (28).
7. The novel horizontal shielded centrifugal pump of claim 1, wherein: and the lower end of the lubricating oil circulating pipeline (28) is provided with an emptying and pressure relief drain outlet (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220472535.9U CN217002301U (en) | 2022-03-04 | 2022-03-04 | Novel horizontal shielding centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220472535.9U CN217002301U (en) | 2022-03-04 | 2022-03-04 | Novel horizontal shielding centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217002301U true CN217002301U (en) | 2022-07-19 |
Family
ID=82368421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220472535.9U Active CN217002301U (en) | 2022-03-04 | 2022-03-04 | Novel horizontal shielding centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217002301U (en) |
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2022
- 2022-03-04 CN CN202220472535.9U patent/CN217002301U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shandong Guoneng Petrochemical Import and Export Co.,Ltd. Assignor: LIHUA YILIJIN REFINERY Co.,Ltd. Contract record no.: X2022980025590 Denomination of utility model: A New Horizontal Shielded Centrifugal Pump Granted publication date: 20220719 License type: Common License Record date: 20221212 |
|
| EE01 | Entry into force of recordation of patent licensing contract |