CN210343714U - High-pressure single-stage pump - Google Patents
High-pressure single-stage pump Download PDFInfo
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- CN210343714U CN210343714U CN201921375658.5U CN201921375658U CN210343714U CN 210343714 U CN210343714 U CN 210343714U CN 201921375658 U CN201921375658 U CN 201921375658U CN 210343714 U CN210343714 U CN 210343714U
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- contact ball
- ball bearing
- angular contact
- pump
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Abstract
The utility model discloses a high-pressure single-stage pump, wherein a balance drum is arranged on the outer side surface of a wheel hub, a gap is reserved between the inner side surface of the balance drum and the wheel hub, a spiral groove is formed on the inner side surface of the balance drum, and the balance drum is fixed on a pump cover through a bolt; the pump cover is provided with a cavity which is communicated with an inlet and an outlet, and the cavity is communicated with cooling liquid through the inlet and the outlet; pump cover fixedly connected with suspension is equipped with angular contact ball bearing subassembly between suspension and the pump shaft, and angular contact ball bearing subassembly includes first angular contact ball bearing, second angular contact ball bearing, third angle contact ball bearing, and first angular contact ball bearing, second angular contact ball bearing's installation direction are the same, and second angular contact ball bearing and third angle contact ball bearing are installed back to back. The utility model discloses an increase balanced drum at the impeller and increased two angular contact ball bearings and realized the balance to big axial force, make single-stage single suction series pump also can accomplish the transport to high pressure medium.
Description
Technical Field
The utility model relates to a pump specifically is a high-pressure single-stage pump.
Background
The single-stage single-suction series pump is suitable for water supply and drainage required by high-rise buildings, mines, fire fighting, cleaning, water treatment, sewage treatment, heat treatment, air conditioning and refrigeration, agricultural irrigation and the like and various liquid delivery in industrial series production flows of food, petrochemical industry, fine chemical industry, medicines, pesticides, textiles, chemical fiber metallurgy, electric power, light industry, machinery and the like, and has the nominal pressure of 1.6MPa as shown in figure 1.
However, under some special working conditions, for example, when acetylene, liquefied gas and other media are transported, the acetylene and liquefied gas are gaseous at normal temperature and are extremely easy to explode, so that the acetylene and liquefied gas are required to be changed into liquid under high pressure and then transported, the pressure for general transportation is 10MPa, and the inlet pressure of the pump is already large, so that the existing single-stage single-suction series pump cannot meet the high-pressure requirement. In the high-pressure conveying process, the pressure in the pump cavity is overlarge, the generated axial force is overlarge, a large backward thrust can be generated on the impeller, the damage of the bearing can be caused, and the service life of the pump is shortened.
SUMMERY OF THE UTILITY MODEL
For solving the defect of above-mentioned prior art, the utility model provides a high pressure single-stage pump, the utility model discloses an increase balanced drum at the impeller and increased two angular contact ball bearings and realized the balance to big axial force, make single-stage single suction series pump also can accomplish the transport to the high pressure medium.
In order to achieve the technical purpose, the utility model adopts the following technical scheme: a high-pressure single-stage pump comprises a pump body, a pump cover and a pump shaft, wherein an impeller is fixed at one end of the pump shaft, the impeller comprises a front cover plate and a rear cover plate, a hub is outwards protruded from the outer side surface of the rear cover plate, and the hub is fixed on the pump shaft; a balance drum is arranged on the outer side surface of the hub, a gap is reserved between the inner side surface of the balance drum and the hub, a spiral groove is formed in the inner side surface of the balance drum, and the balance drum is fixed on the pump cover through a bolt;
the pump cover is provided with a cavity which is communicated with an inlet and an outlet, and the cavity is communicated with cooling liquid through the inlet and the outlet;
the pump cover fixedly connected with suspension, the suspension with be equipped with angular contact ball bearing subassembly between the pump shaft, angular contact ball bearing subassembly includes first angular contact ball bearing, second angular contact ball bearing, third angle contact ball bearing, first angular contact ball bearing the installation direction of second angular contact ball bearing is the same, second angular contact ball bearing with third angle contact ball bearing installs back to back.
Furthermore, a cover plate is fixed on the cavity and is welded with the pump cover.
Further, a plurality of blades are fixed between the front cover plate and the rear cover plate and are uniformly arranged around the axis of the rear cover plate.
Further, the pressure-bearing grade of the pump body is 10 MPa.
To sum up, the utility model discloses following technological effect has been gained:
1. the utility model increases the thickness of the pump body to meet the requirement of high pressure impact force and enhance the strength of the pump body for realizing the medium transportation under high pressure;
2. the utility model is provided with a balance drum at the rear end of the impeller, which is used for balancing the axial force brought by the high pressure of the inlet;
3. the utility model adds the first angular contact ball bearing and the second angular contact ball bearing, further counteracts the axial force, achieves the purpose of stability, avoids the damage to the pump caused by the axial force brought by high pressure, and ensures that the single-stage single-suction series pump can also finish the transportation of high-pressure medium;
4. the utility model discloses let in the coolant liquid in the pump cover, reduce operating temperature, avoid the high pressure to cause the high temperature to lead to the medium explosion.
Drawings
FIG. 1 is a block diagram of a prior art single stage, single suction series pump;
FIG. 2 is a schematic diagram of a high pressure single stage pump mechanism provided by an embodiment of the present invention;
FIG. 3 is a schematic view of portion A of FIG. 2;
FIG. 4 is a schematic view of portion B of FIG. 2;
in the figure, the pump comprises a pump body 1, a pump cover 2, a pump cover 3, a pump shaft 4, an impeller 401, a front cover plate 402, blades 403, a rear cover plate 404, a hub 5, a balance drum 501, a spiral groove 502, a bolt 6, a cavity 7, an inlet and outlet 8, a shroud plate 9, an angular contact ball bearing assembly 901, a first angular contact ball bearing 902, a second angular contact ball bearing 903, a third angular contact ball bearing 10 and a suspension.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Example (b):
as shown in fig. 1, which is a structure diagram of a single-stage single-suction series pump, a large axial force is generated due to a large inlet pressure of the pump in high-pressure delivery, and a nominal pressure of the single-stage single-suction series pump is 1.6MPa, which cannot meet the working condition of high-pressure delivery, for example, above 7.5 MPa.
As shown in fig. 2, a high-pressure single-stage pump includes a pump body 1, a pump cover 2 and a pump shaft 3, wherein an impeller 4 is fixed at one end of the pump shaft 3, as shown in fig. 3, the impeller 4 includes a front cover plate 401 and a rear cover plate 403, a hub 404 is protruded outwards from the outer side surface of the rear cover plate 403, and the hub 404 is fixed on the pump shaft 3; the outer side surface of the hub 404 is provided with a balance drum 5 for balancing the axial force caused by the high pressure at the inlet, a gap is reserved between the inner side surface of the balance drum 5 and the hub 404, the inner side surface of the balance drum 5 is provided with a spiral groove 501, and the balance drum 5 is fixed on the pump cover 2 through a bolt 502. The smaller the gap between the inner side surface of the balance drum 5 and the hub 404 is, the better the gap is, the single side gap distance is 0.15-0.3 mm in the embodiment, the gap and the spiral groove 501 are used for balancing the pressure outside the impeller, the high pressure outside the impeller is prevented from entering the mechanical seal, and the mechanical seal is prevented from being damaged.
As shown in fig. 3, a cavity 6 is formed on the pump cover 2, the cavity 6 is communicated with an inlet and an outlet 7, and the cavity 6 is communicated with cooling liquid through the inlet and the outlet 7 to form a cooling liquid circulation system; the pump cover 2 is provided with another inlet/outlet (not shown) at a position corresponding to the inlet/outlet 7. The cavity is filled with cooling liquid, so that the temperature can be reduced, and the medium explosion caused by high temperature generated by high pressure is avoided. The cavity 6 is fixed with a shroud plate 8, and the shroud plate 8 is welded with the pump cover 2 to avoid leakage of cooling liquid.
As shown in fig. 1, a suspension 10 is fixedly connected to the pump cover 2, an angular contact ball bearing assembly 9 is arranged between the suspension 10 and the pump shaft 3, as shown in fig. 4, the angular contact ball bearing assembly 9 includes a first angular contact ball bearing 901, a second angular contact ball bearing 902, and a third angular contact ball bearing 903, the mounting directions of the first angular contact ball bearing 901 and the second angular contact ball bearing 902 are the same, and the second angular contact ball bearing 902 and the third angular contact ball bearing 903 are mounted back to back.
Compared with one angular contact ball bearing (shown in fig. 1) in a single-stage single-suction series pump, the present embodiment adds two angular contact ball bearings, that is, adds the first angular contact ball bearing 901 and the second angular contact ball bearing 902, and the first angular contact ball bearing 901 and the second angular contact ball bearing 902 have the same installation direction, and the opening faces the impeller direction, because the pressure at the inlet is relatively large, an axial force from the impeller to the motor shaft direction is generated, the balance drum 5 counteracts a part of the axial force, and the first angular contact ball bearing 901 and the second angular contact ball bearing 902 counteract a part of the axial force, so as to generate balance, thereby avoiding the motor shaft from being damaged.
As shown in fig. 3, a plurality of blades 402 are fixed between a front cover plate 401 and a rear cover plate 403, and the plurality of blades 402 are uniformly arranged around the axis of the rear cover plate 403.
In addition, in order to satisfy the high-pressure working condition, in this embodiment, the thickness of the pump body 1 is increased, and when the pressure is 10MPa, the pressure-bearing grade of the pump body 1 is 10MPa, and the thickness is 20-36 mm.
Compared with the prior art, the utility model discloses a satisfy the not high but the very big special operating mode of pump chamber internal pressure of lift requirement, with the thickness increase of the pump body 1, satisfy highly compressed impact force. The utility model discloses set up balanced drum 5 in the rear end of impeller for the axial force that the balanced import high pressure brought increases first angular contact ball bearing 901, second angular contact ball bearing 902, further offsets the axial force, reaches steady purpose, avoids the axial force that the high pressure brought to produce the pump and damages, makes single-stage single suction series pump also can accomplish the transport to the high pressure medium. And cooling liquid is introduced into the pump cover, so that the working temperature is reduced, and the explosion caused by high temperature due to high pressure is avoided.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.
Claims (4)
1. The utility model provides a high-pressure single-stage pump, includes the pump body (1), pump cover (2) and pump shaft (3), the one end of pump shaft (3) is fixed with impeller (4), its characterized in that: the impeller (4) comprises a front cover plate (401) and a rear cover plate (403), a hub (404) is arranged on the outer side surface of the rear cover plate (403) in an outward protruding mode, and the hub (404) is fixed on the pump shaft (3); a balance drum (5) is arranged on the outer side surface of the hub (404), a gap is reserved between the inner side surface of the balance drum (5) and the hub (404), a spiral groove (501) is formed in the inner side surface of the balance drum (5), and the balance drum (5) is fixed on the pump cover (2) through a bolt (502);
a cavity (6) is formed in the pump cover (2), the cavity (6) is communicated with an inlet and an outlet (7), and the cavity (6) is communicated with cooling liquid through the inlet and the outlet (7);
the pump cover (2) is fixedly connected with a suspension (10), an angular contact ball bearing assembly (9) is arranged between the suspension (10) and the pump shaft (3), the angular contact ball bearing assembly (9) comprises a first angular contact ball bearing (901), a second angular contact ball bearing (902) and a third angular contact ball bearing (903), the mounting directions of the first angular contact ball bearing (901) and the second angular contact ball bearing (902) are the same, and the second angular contact ball bearing (902) and the third angular contact ball bearing (903) are mounted back to back.
2. A high pressure single stage pump according to claim 1, wherein: and a shroud plate (8) is fixed on the cavity (6), and the shroud plate (8) is welded with the pump cover (2).
3. A high pressure single stage pump according to claim 1, wherein: a plurality of blades (402) are fixed between the front cover plate (401) and the rear cover plate (403), and the blades (402) are uniformly arranged around the axis of the rear cover plate (403).
4. A high pressure single stage pump according to claim 1, wherein: the pressure-bearing grade of the pump body (1) is 10 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921375658.5U CN210343714U (en) | 2019-08-22 | 2019-08-22 | High-pressure single-stage pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921375658.5U CN210343714U (en) | 2019-08-22 | 2019-08-22 | High-pressure single-stage pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210343714U true CN210343714U (en) | 2020-04-17 |
Family
ID=70176006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921375658.5U Active CN210343714U (en) | 2019-08-22 | 2019-08-22 | High-pressure single-stage pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210343714U (en) |
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2019
- 2019-08-22 CN CN201921375658.5U patent/CN210343714U/en active Active
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