CN219827156U - Centrifugal pump with high cavitation resistance - Google Patents
Centrifugal pump with high cavitation resistance Download PDFInfo
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- CN219827156U CN219827156U CN202322113191.XU CN202322113191U CN219827156U CN 219827156 U CN219827156 U CN 219827156U CN 202322113191 U CN202322113191 U CN 202322113191U CN 219827156 U CN219827156 U CN 219827156U
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- pump
- bearing
- oil
- impeller
- oil injection
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000009792 diffusion process Methods 0.000 claims abstract description 20
- 239000003921 oil Substances 0.000 claims description 69
- 239000007788 liquid Substances 0.000 claims description 62
- 238000002347 injection Methods 0.000 claims description 32
- 239000007924 injection Substances 0.000 claims description 32
- 238000011010 flushing procedure Methods 0.000 claims description 25
- 238000001816 cooling Methods 0.000 claims description 21
- 239000010687 lubricating oil Substances 0.000 claims description 10
- 241000886569 Cyprogenia stegaria Species 0.000 claims 2
- 239000000411 inducer Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a centrifugal pump with high cavitation resistance, which belongs to the technical field of pumps and comprises a pump body, a pump cover, an impeller and a pump shaft; the left side of the pump body is provided with a water inlet, the top of the pump body is provided with a water outlet, the right side of the pump body is provided with a pump cover, an impeller is arranged in the pump body, the end part of a blade of the impeller is of an arc-shaped structure, and the end part of a pump shaft extends into a rotating shaft connected with the impeller in the pump body; the suction section inner wall of the pump body is provided with a plurality of space diffusion guide vanes, the plurality of space diffusion guide vanes are uniformly distributed in the circumference of the suction section inner wall, the section of the space diffusion guide vanes is of an airfoil structure, and the space diffusion guide vanes are arranged along the water flow direction. The utility model solves the problem of poor cavitation performance of the centrifugal pump in the prior art. The centrifugal pump has good high cavitation resistance, is suitable for working conditions of high flow and low inlet pressure, and has the advantages of simple structure and low cost compared with the prior art.
Description
Technical Field
The utility model belongs to the technical field of pumps, and particularly relates to a centrifugal pump with high cavitation resistance.
Background
Centrifugal pumps operate by using rotation of an impeller to cause centrifugal movement of water. Before the centrifugal pump is started, the pump shell and the water suction pipe are filled with water, then the motor is started, the pump shaft drives the impeller and the water to do high-speed rotation, the water is centrifugally moved and thrown to the outer edge of the impeller, and the water flows into the water pressing pipeline of the water pump through the flow channel of the volute pump shell. Under the working conditions of large flow and low inlet pressure, the cavitation allowance of the centrifugal pump is required to be low, namely the centrifugal pump is required to have good high cavitation resistance. At present, an inducer is selected to increase the inlet pressure of the impeller, but the inducer has a complex manufacturing process, and extra power consumption is increased when the inducer rotates along with the main impeller. At present, a double-suction centrifugal pump can be selected, but the cost of the double-suction centrifugal pump is higher.
Disclosure of Invention
The embodiment of the utility model solves the problem of poor cavitation performance of the centrifugal pump in the prior art by providing the centrifugal pump with high cavitation resistance.
In order to achieve the above object, an embodiment of the present utility model provides a centrifugal pump with high cavitation resistance, including a pump body, a pump cover, an impeller, and a pump shaft;
the left side of the pump body is provided with a water inlet, the top of the pump body is provided with a water outlet, the right side of the pump body is provided with the pump cover, the inside of the pump body is provided with the impeller, the end parts of the blades of the impeller are arc-shaped structures, and the end parts of the pump shaft extend into the pump body and are connected with a rotating shaft of the impeller;
the suction section inner wall of the pump body is provided with a plurality of space diffusion guide vanes, the space diffusion guide vanes are uniformly distributed in the circumference of the suction section inner wall, the section of each space diffusion guide vane is of an airfoil structure, and the space diffusion guide vanes are arranged along the water flow direction.
In one possible implementation, the liquid outlet at the bottom of the pump body is connected to the liquid inlet of the liquid discharge pipeline.
In one possible implementation, a bearing box is mounted on the right side of the pump cover, and a mechanical seal and flushing mechanism is arranged between the front end in the bearing box and the pump shaft;
the mechanical seal is sleeved on the pump shaft, the mechanical seal is installed in a shell of the flushing mechanism, the shell is fixed in the bearing box body, a liquid outlet of a liquid inlet pipe of the flushing mechanism is connected to a flushing liquid inlet of the shell, a liquid inlet of a liquid outlet pipe of the flushing mechanism is connected to a flushing liquid outlet of the shell, and the liquid outlet pipe and the liquid inlet pipe respectively penetrate through holes at the upper end and the lower end of the bearing box body.
In one possible implementation, a fan housing is disposed on the right side of the bearing housing, and a cooling fan is disposed in the fan housing and is mounted on the pump shaft.
In one possible implementation manner, an oil injection cavity is formed in the rear portion in the bearing box body, bearing lubricating oil is arranged in the oil injection cavity, an oil injection hole and an oil drain hole are formed in the upper end and the lower end of the bearing box body respectively, an oil injection plug is arranged on the oil injection hole, and an oil drain plug is arranged on the oil drain hole;
and a deep groove ball bearing and an angular contact ball bearing are respectively arranged between the front side and the rear side of the oil injection cavity of the pump shaft and the bearing box body.
In one possible implementation manner, the pump shaft is provided with a front bearing isolator on one side of the deep groove ball bearing, which is far away from the oil injection cavity, and a rear bearing isolator on one side of the angular contact ball bearing, which is far away from the oil injection cavity, and both the front bearing isolator and the rear bearing isolator are installed in the bearing box.
In one possible implementation manner, the bearing water cooling coil is arranged in the oil injection cavity, the bearing water cooling coil is positioned in the bearing lubricating oil, and the water inlet pipe and the water outlet pipe of the bearing water cooling coil extend out of the bearing box body.
In one possible implementation, an oil slinger is mounted on the pump shaft, the oil slinger being located in the middle of the oil injection cavity.
In one possible implementation, the bearing housing is provided with a viewing window at a side wall of the oil filling chamber.
In one possible implementation, the impeller is provided with wear rings on both sides, which are fixedly mounted.
One or more technical solutions provided in the embodiments of the present utility model at least have the following technical effects or advantages:
the embodiment of the utility model provides a centrifugal pump with high cavitation resistance, and the blade end part of an impeller of the centrifugal pump is of an arc-shaped structure, so that the width of the inlet edge of the blade is effectively increased, the blade extends forwards, the liquid is further contacted with the blade in advance to apply work, the liquid obtains pressure energy, and the energy of the liquid at the blade is improved. The problem that the liquid is gasified to generate gas when the liquid pressure is reduced to the liquid vaporization pressure after the liquid enters the pump body is avoided. The liquid obtains certain pressure energy after passing through the space diffusion guide vane, so that the pressure of the liquid at the impeller inlet is increased, the liquid flows more stably when reaching the impeller inlet, the loss is not easy to generate, and the pressure drop is reduced. Therefore, the centrifugal pump has good high cavitation resistance, is suitable for working conditions of high flow and low inlet pressure, and has the advantages of simple structure and low cost compared with the prior art.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a centrifugal pump with high cavitation resistance according to an embodiment of the present utility model.
Fig. 2 is a schematic installation diagram of a spatial diffusion guide vane according to an embodiment of the present utility model.
Reference numerals: 1-a pump body; 2-a pump cover; 3-an impeller; 31-arc structure; 4-pump shaft; 5-spatial diffusion guide vanes; 6-a liquid discharge pipeline; 7-a bearing housing; 71-an oil filling cavity; 8-mechanical sealing; 9-a flushing mechanism; 91-a housing; 92-flushing fluid inlet; 93-a flushing liquid outlet; 10-a cooling fan; 11-oil injection blocking; 12-oil drain blocking; 13-deep groove ball bearings; 14-angular contact ball bearings; 15-front bearing isolator; 16-rear bearing isolator; 17-bearing water cooling coil pipe; 18-oil slingers; 19-a viewing window; 20-wear ring.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the embodiments of the present utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.
As shown in fig. 1 and 2, the centrifugal pump with high cavitation resistance provided by the embodiment of the utility model comprises a pump body 1, a pump cover 2, an impeller 3 and a pump shaft 4.
The left side of the pump body 1 is provided with the water inlet, and the top of the pump body 1 is provided with the delivery port, and pump cover 2 is installed on the right side of the pump body 1, is provided with impeller 3 in the pump body 1, and the blade tip of impeller 3 is arc structure 31, and the tip of pump shaft 4 stretches into the pump body 1 and connects in the pivot of impeller 3.
The suction section inner wall of the pump body 1 is provided with a plurality of space diffusion guide vanes 5, the plurality of space diffusion guide vanes 5 are uniformly distributed in the circumference of the suction section inner wall, the section of the space diffusion guide vanes 5 is of an airfoil structure, and the space diffusion guide vanes 5 are arranged along the water flow direction.
It should be noted that, the blade end of impeller 3 is arc structure 31, has consequently effectively increased the width of blade import limit for the blade stretches forward, and then makes liquid and blade contact acting in advance, makes liquid obtain the pressure energy, has promoted the energy of liquid in blade department, has avoided liquid entering pump body 1 when liquid pressure falls below liquid vaporization pressure down, and the liquid takes place vaporization and produces gaseous problem. The space guide vane and the suction section of the pump body 1 are of an integrated processing structure, and the space guide vane and the inner wall of the suction section are cast integrally in the embodiment. The liquid obtains certain pressure energy after passing through the space diffusion guide vane 5, so that the pressure of the liquid at the inlet of the impeller 3 is increased, the flow of the liquid is more stable when the liquid reaches the inlet of the impeller 3, the loss is not easy to generate, and the pressure drop is reduced. Therefore, the centrifugal pump has good high cavitation resistance, is suitable for working conditions of high flow and low inlet pressure, and has the advantages of simple structure and low cost compared with the prior art.
In this embodiment, the liquid outlet at the bottom of the pump body 1 is connected to the liquid inlet of the liquid discharge pipe 6.
After the centrifugal pump stops working, the residual liquid in the pump is discharged through the liquid discharge pipeline 6.
In this embodiment, the right side of the pump cover 2 is provided with a bearing housing 7, and a mechanical seal 8 and a flushing mechanism 9 are provided between the front end in the bearing housing 7 and the pump shaft 4.
The mechanical seal 8 is sleeved on the pump shaft 4, the mechanical seal 8 is arranged in a shell 91 of the flushing mechanism 9, the shell 91 of the flushing mechanism 9 is fixed in the bearing box 7, a liquid outlet of a liquid inlet pipe of the flushing mechanism 9 is connected with a flushing liquid inlet 92 of the shell 91, a liquid inlet of a liquid outlet pipe of the flushing mechanism 9 is connected with a flushing liquid outlet 93 of the shell 91, and the liquid outlet pipe and the liquid inlet pipe respectively penetrate through holes at the upper end and the lower end of the bearing box 7.
The mechanical seal 8 is used for sealing the pump shaft 4, and the mechanical seal 8 adopts a sealing structure of the prior art. The liquid inlet pipe of the flushing mechanism 9 conveys flushing liquid into the shell 91 to flush the mechanical seal 8, so that the mechanical seal 8 keeps a good working state, and the flushed flushing liquid is discharged through the liquid outlet pipe.
In this embodiment, a fan housing is provided on the right side of the bearing housing 7, a cooling fan 10 is provided in the fan housing, and the cooling fan 10 is mounted on the pump shaft 4.
The cooling fan 10 is used for cooling the bearing housing 7.
In this embodiment, an oil injection cavity 71 is disposed at the rear portion in the bearing housing 7, bearing lubricating oil is disposed in the oil injection cavity 71, an oil injection hole and an oil drain hole are respectively disposed at the upper end and the lower end of the bearing housing 7, an oil injection plug 11 is mounted on the oil injection hole, and an oil drain plug 12 is mounted on the oil drain hole.
The pump shaft 4 and the bearing housing 7 are respectively provided with a deep groove ball bearing 13 and an angular contact ball bearing 14 between the front side and the rear side of the oil filling cavity 71.
The oil filling hole and the oil drain hole are used for filling and draining the oil filling cavity 71, respectively. The bearing lubricating oil can lubricate the deep groove ball bearing 13 and the angular contact ball bearing 14.
In this embodiment, the pump shaft 4 is provided with a front bearing isolator 15 on a side of the deep groove ball bearing 13 away from the oil injection cavity 71, and the pump shaft 4 is provided with a rear bearing isolator 16 on a side of the angular contact ball bearing 14 away from the oil injection cavity 71, and both the front bearing isolator 15 and the rear bearing isolator 16 are mounted in the bearing housing 7.
The front bearing isolator 15 and the rear bearing isolator 16 are mounted at the bearing gland, and oil seals are provided between the front bearing isolator 15 and the rear bearing isolator 16 and the pump shaft 4, so that the leakage of bearing lubricating oil in the oil injection cavity 71 is prevented.
In this embodiment, the oil filling cavity 71 is provided with a bearing water cooling coil 17, the bearing water cooling coil 17 is located in the bearing lubricating oil, and both the water inlet pipe and the water outlet pipe of the bearing water cooling coil 17 extend out of the bearing box 7.
The horizontal portion of the bearing water-cooling coil 17 shown in fig. 1 has a U-shaped structure, and the bearing water-cooling coil 17 cools the oil injection chamber 71 by bearing lubricating oil.
In this embodiment, the oil slinger 18 is mounted on the pump shaft 4, and the oil slinger 18 is located in the middle of the oil injection cavity 71.
The oil slinger 18 is mounted on an oil ring mount which is fixed to the pump shaft 4 by a set screw, and which prevents the oil slinger 18 from moving back and forth on the pump shaft 4. When the oil slinger 18 rotates along with the pump shaft 4, bearing lubricating oil can be driven to be thrown up, so that the deep groove ball bearing 13 and the angular contact ball bearing 14 are fully lubricated, and the heat exchange efficiency of the bearing water cooling coil 17 can be improved by the oil slinger 18.
In this embodiment, the bearing housing 7 is provided with an observation window 19 at the side wall of the oil filling chamber 71.
The bearing oil in the oil filling chamber 71 is located at 1/3 to 2/3 of the observation window 19, and if the bearing oil is out of this range, the oil is filled through the oil filling hole or discharged through the oil discharging hole.
In this embodiment, wear-resistant rings 20 are provided on both sides of the impeller 3, and the wear-resistant rings 20 are fixedly installed.
The wear ring 20 on the left side of the impeller 3 is attached to the pump body 1, and the wear ring 20 on the right side of the impeller 3 is attached to the pump cover 2.
In the present embodiment, it will be apparent to those skilled in the art that the present utility model is not limited to the details of the above-described exemplary embodiments, but that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. A centrifugal pump with high cavitation resistance, characterized in that: comprises a pump body (1), a pump cover (2), an impeller (3) and a pump shaft (4);
the novel water pump is characterized in that a water inlet is formed in the left side of the pump body (1), a water outlet is formed in the top of the pump body (1), the pump cover (2) is arranged on the right side of the pump body (1), the impeller (3) is arranged in the pump body (1), the end parts of blades of the impeller (3) are arc-shaped structures (31), and the end parts of the pump shafts (4) extend into the pump body (1) and are connected with rotating shafts of the impeller (3);
the suction section inner wall of the pump body (1) is provided with a plurality of space diffusion guide vanes (5), the space diffusion guide vanes (5) are uniformly distributed in the circumference of the suction section inner wall, the section of the space diffusion guide vanes (5) is of an airfoil structure, and the space diffusion guide vanes (5) are arranged along the water flow direction.
2. A centrifugal pump with high cavitation resistance according to claim 1, characterized in that: the liquid outlet at the bottom of the pump body (1) is connected with the liquid inlet of the liquid discharge pipeline (6).
3. A centrifugal pump with high cavitation resistance according to claim 1, characterized in that: a bearing box body (7) is arranged on the right side of the pump cover (2), and a mechanical seal (8) and a flushing mechanism (9) are arranged between the front end in the bearing box body (7) and the pump shaft (4);
the mechanical seal (8) is sleeved on the pump shaft (4), the mechanical seal (8) is installed in a shell (91) of the flushing mechanism (9), the shell (91) is fixed in the bearing box (7), a liquid outlet of a liquid inlet pipe of the flushing mechanism (9) is connected to a flushing liquid inlet (92) of the shell (91), a liquid inlet of a liquid outlet pipe of the flushing mechanism (9) is connected to a flushing liquid outlet (93) of the shell (91), and the liquid outlet pipe and the liquid inlet pipe respectively penetrate through holes in the upper end and the lower end of the bearing box (7).
4. A centrifugal pump with high cavitation resistance according to claim 3, characterized in that: the right side of bearing box (7) is provided with the fan shell, be provided with cooling fan (10) in the fan shell, cooling fan (10) install on pump shaft (4).
5. A centrifugal pump with high cavitation resistance according to claim 3, characterized in that: an oil injection cavity (71) is formed in the rear portion in the bearing box body (7), bearing lubricating oil is arranged in the oil injection cavity (71), an oil injection hole and an oil drain hole are formed in the upper end and the lower end of the bearing box body (7) respectively, an oil injection plug (11) is arranged on the oil injection hole, and an oil drain plug (12) is arranged on the oil drain hole;
the pump shaft (4) and the bearing box body (7) are respectively provided with a deep groove ball bearing (13) and an angular contact ball bearing (14) between the front side and the rear side of the oil injection cavity (71).
6. The high cavitation resistant centrifugal pump of claim 5 wherein: the pump shaft (4) is provided with a front bearing isolator (15) at one side of the deep groove ball bearing (13) far away from the oil injection cavity (71), the pump shaft (4) is provided with a rear bearing isolator (16) at one side of the angular contact ball bearing (14) far away from the oil injection cavity (71), and the front bearing isolator (15) and the rear bearing isolator (16) are both installed in the bearing box body (7).
7. The high cavitation resistant centrifugal pump of claim 5 wherein: the oil injection cavity (71) is internally provided with a bearing water-cooling coil pipe (17), the bearing water-cooling coil pipe (17) is positioned in the bearing lubricating oil, and a water inlet pipe and a water outlet pipe of the bearing water-cooling coil pipe (17) extend out of the bearing box body (7).
8. The high cavitation resistant centrifugal pump of claim 5 wherein: an oil slinger (18) is mounted on the pump shaft (4), and the oil slinger (18) is located in the middle of the oil injection cavity (71).
9. The high cavitation resistant centrifugal pump of claim 5 wherein: the bearing box body (7) is provided with an observation window (19) at the side wall of the oil injection cavity (71).
10. A centrifugal pump with high cavitation resistance according to claim 1, characterized in that: wear-resistant rings (20) are arranged on two sides of the impeller (3), and the wear-resistant rings (20) are fixedly installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322113191.XU CN219827156U (en) | 2023-08-08 | 2023-08-08 | Centrifugal pump with high cavitation resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322113191.XU CN219827156U (en) | 2023-08-08 | 2023-08-08 | Centrifugal pump with high cavitation resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219827156U true CN219827156U (en) | 2023-10-13 |
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ID=88283386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322113191.XU Active CN219827156U (en) | 2023-08-08 | 2023-08-08 | Centrifugal pump with high cavitation resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219827156U (en) |
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2023
- 2023-08-08 CN CN202322113191.XU patent/CN219827156U/en active Active
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