CN216008910U - Centrifugal pump with negative pressure structure - Google Patents
Centrifugal pump with negative pressure structure Download PDFInfo
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- CN216008910U CN216008910U CN202121934085.2U CN202121934085U CN216008910U CN 216008910 U CN216008910 U CN 216008910U CN 202121934085 U CN202121934085 U CN 202121934085U CN 216008910 U CN216008910 U CN 216008910U
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- main shaft
- impeller
- shaft body
- middle support
- negative pressure
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Abstract
The utility model discloses a centrifugal pump with a negative pressure structure, which comprises a main shaft body and a bearing box, wherein the main shaft body is rotatably inserted in the bearing box, one end of the main shaft body is rotatably sleeved with a middle support, one end of the main shaft body, which is positioned in the middle support, is rotatably sleeved with a sealing assembly, the sealing assembly is fixedly connected with the inner wall of the middle support, one end of the main shaft body, which is close to the middle support, is fixedly sleeved with an impeller, one end of the middle support, which is close to the impeller, is fixedly connected with a suction chamber, two sides of one end of the middle support, which is close to the impeller, are respectively and fixedly communicated with a water inlet and a water outlet, and one side of the impeller, which is far away from the middle support, is rotatably connected with an impeller cover. The utility model adopts the negative pressure device, the shaft seal is positioned at the pump suction inlet, and the suction inlet belongs to the negative pressure environment, so that the atmospheric pressure is higher than the pressure at the shaft seal when the pump runs, the sealing performance of the pump can be effectively ensured, and the shaft seal basically has no leakage.
Description
Technical Field
The utility model relates to the technical field of centrifugal pumps, in particular to a centrifugal pump with a negative pressure structure.
Background
Centrifugal pumps operate by causing water to move centrifugally as a result of the rotation of an impeller. Before the water 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 rotate at a high speed, the water is thrown to the outer edge of the impeller to be thrown into a water pressure pipeline of the water pump through a flow channel of the volute-shaped pump shell.
However, the existing centrifugal pump has a simpler internal structure and poorer sealing performance, so that the shaft seal of the centrifugal pump is easy to leak.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that the internal structure of a centrifugal pump is simpler and the sealing performance of the centrifugal pump is poorer in the prior art, and provides the centrifugal pump with a negative pressure structure.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a centrifugal pump with a negative pressure structure comprises a main shaft body and a bearing box, wherein the main shaft body is rotatably inserted in the bearing box, one end of the main shaft body is rotatably sleeved with the middle bracket, one end of the main shaft body positioned in the middle bracket is rotatably sleeved with the sealing component, the sealing component is fixedly connected with the inner wall of the middle bracket, one end of the main shaft body close to the middle bracket is fixedly sleeved with an impeller, the end of the middle bracket close to the impeller is fixedly connected with a suction chamber, the two sides of the middle bracket close to the end of the impeller are respectively and fixedly communicated with a water inlet and a water outlet, one side of the impeller, which is far away from the middle bracket, is rotatably connected with an impeller cover, the water inlet and the water outlet are connected with a diversion cover through a plurality of bolts, the impeller cover is characterized in that a clamping block is fixedly connected to the outer wall of the impeller cover, a clamping rod is slidably inserted into the clamping block, and a clamping groove corresponding to the clamping rod is formed in the bolt.
Preferably, the both ends of bearing box are fixedly connected with front bearing cap and back bearing cap respectively, all be equipped with the opening that corresponds with the main shaft body on front bearing cap and the back bearing cap.
Preferably, the two ends of the main shaft body in the bearing box are rotatably sleeved with sealing rings, and the edges of the sealing rings are fixedly connected with the inner wall of the bearing box.
Preferably, one end of the spindle body located in the suction chamber is rotatably sleeved with a shaft sleeve.
Preferably, the top of the clamping rod is fixedly connected with a pull rod, one end of the clamping rod, which is close to the bolt, is fixedly sleeved with a clamping sleeve, the clamping rod is sleeved with a spring, and two ends of the spring are respectively fixedly connected with the clamping sleeve and the clamping block.
Preferably, the suction chamber is fixedly connected with the intermediate bracket through a fastening bolt.
Has the advantages that:
1. according to the utility model, the negative pressure device is adopted, the shaft seal is positioned at the pump suction inlet, and the suction inlet belongs to a negative pressure environment, so that when the pump operates, the atmospheric pressure is higher than the pressure at the shaft seal, the sealing performance of the pump can be effectively ensured, and the shaft seal basically has no leakage;
2. the utility model adopts a long support structure and a non-rigid connection mode. Most of the axial force generated when the pump runs is born by the bearing of the pump bearing box, the axial force born by the motor is reduced, and the service lives of the motor and the pump are prolonged;
3. the utility model adopts the mode of axial inlet and radial outlet, the impeller adopts a semi-open type and wide flow channel, and the impeller is not easy to block, resists crystallization and particles when conveying slurry containing particles.
Drawings
FIG. 1 is a schematic structural view of a centrifugal pump with a negative pressure structure according to the present invention;
fig. 2 is a schematic structural view of a portion a of fig. 1.
In the figure: the device comprises a main shaft body 1, a bearing box 2, a middle support 3, a sealing assembly 4, an impeller 5, a suction chamber 6, an impeller cover 7, a front bearing cover 8, a rear bearing cover 9, a sealing ring 10, a shaft sleeve 11, a plug pin 12, a flow guide cover 13, a fastening bolt 14, a clamping block 15, a clamping rod 16, a clamping sleeve 17, a pull rod 18 and a spring 19.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-2, a centrifugal pump with a negative pressure structure comprises a main shaft body 1 and a bearing box 2, wherein the main shaft body 1 is rotatably inserted into the bearing box 2, two ends of the bearing box 2 are respectively and fixedly connected with a front bearing cover 8 and a rear bearing cover 9 for ensuring the sealing performance of the two ends of the bearing box 2, and the front bearing cover 8 and the rear bearing cover 9 are respectively provided with a through hole corresponding to the main shaft body 1;
in the embodiment, the two ends of the main shaft body 1, which are positioned in the bearing box 2, are rotatably sleeved with the sealing rings 10, the edges of the sealing rings 10 are fixedly connected with the inner wall of the bearing box 2, so that the sealing performance between the main shaft body 1 and the bearing box 2 is enhanced, one end of the main shaft body 1 is rotatably sleeved with the middle support 3 and is used for supporting the main shaft body 1, one end of the main shaft body 1, which is positioned in the middle support 3, is rotatably sleeved with the sealing component 4, the sealing component 4 is fixedly connected with the inner wall of the middle support 3, so that the sealing effect between the middle support 3 and the main shaft body 1 is enhanced;
in the embodiment, an impeller 5 is fixedly sleeved at one end of the main shaft body 1 close to the intermediate support 3, a suction chamber 6 is fixedly connected at one end of the intermediate support 3 close to the impeller 5, and the suction chamber 6 is fixedly connected with the intermediate support 3 through a fastening bolt 14, so that the suction chamber 6 and the intermediate support 3 are convenient to disassemble;
in the embodiment, one end of the main shaft body 1, which is positioned in the suction chamber 6, is rotatably sleeved with the shaft sleeve 11, two sides of one end of the middle support 3, which is close to the impeller 5, are respectively and fixedly communicated with a water inlet and a water outlet, a flow guide cover 13 is fixedly connected in the water inlet and the water outlet through locking screws 12, so that water flow can be conveniently led in and led out, and one side of the impeller 5, which is far away from the middle support 3, is rotatably connected with the impeller cover 7;
in this embodiment, all be connected with kuppe 13 through a plurality of bolts 12 in water inlet and the water outlet, play the effect of water conservancy diversion, fixedly connected with fixture block 15 on the outer wall of impeller lid 7, sliding on fixture block 15 is inserted and is equipped with kelly 16, be used for fixing bolt 12, be equipped with the draw-in groove that corresponds with kelly 16 on the bolt 12, the top fixedly connected with pull rod 18 of kelly 16, kelly 16 is close to the fixed cover of one end of bolt 12 and has been connect cutting ferrule 17, prevent that kelly 16 from droing from 15 fixture blocks, the cover is equipped with spring 19 on the kelly 16, spring 19's both ends respectively with cutting ferrule 17 and fixture block 15 fixed connection, play certain elastic support to kelly 16.
In the embodiment, the negative pressure device is adopted, the shaft seal is positioned at the pump suction inlet, and the suction inlet belongs to a negative pressure environment, so that when the pump operates, the atmospheric pressure is higher than the pressure at the shaft seal, the sealing performance of the pump can be effectively ensured, and the shaft seal basically has no leakage.
In this embodiment, a long support structure and a non-rigid connection mode are adopted. Most of the axial force generated when the pump runs is born by the bearing of the pump bearing box, the axial force born by the motor is reduced, and the service life of the motor and the pump is prolonged.
In the embodiment, an axial inlet and a radial outlet are adopted, the impeller 5 is semi-open and wide in flow channel, and is not easy to block, resistant to crystallization and resistant to particles when slurry containing particles is conveyed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (6)
1. The utility model provides a centrifugal pump with negative pressure structure, includes the main shaft body (1) and bearing box (2), its characterized in that: the main shaft body (1) is rotatably inserted in the bearing box (2), one end of the main shaft body (1) is rotatably sleeved with the middle support (3), one end of the main shaft body (1) in the middle support (3) is rotatably sleeved with the sealing assembly (4), the sealing assembly (4) is fixedly connected with the inner wall of the middle support (3), one end of the main shaft body (1) close to the middle support (3) is fixedly sleeved with the impeller (5), one end of the middle support (3) close to the impeller (5) is fixedly connected with the suction chamber (6), two sides of one end of the middle support (3) close to the impeller (5) are respectively fixedly communicated with a water inlet and a water outlet, one side of the impeller (5) far away from the middle support (3) is rotatably connected with an impeller cover (7), and the water inlet and the water outlet are both connected with a flow guide cover (13) through a plurality of bolts (12), the impeller is characterized in that a clamping block (15) is fixedly connected to the outer wall of the impeller cover (7), a clamping rod (16) is slidably inserted into the clamping block (15), and a clamping groove corresponding to the clamping rod (16) is formed in the plug pin (12).
2. The centrifugal pump with a negative pressure structure as set forth in claim 1, wherein: the both ends of bearing box (2) are fixedly connected with front bearing cap (8) and back bearing cap (9) respectively, all be equipped with the opening that corresponds with the main shaft body (1) on front bearing cap (8) and back bearing cap (9).
3. The centrifugal pump with a negative pressure structure as set forth in claim 1, wherein: the main shaft body (1) is located at two ends in the bearing box (2) and is rotatably sleeved with the sealing rings (10), and the edges of the sealing rings (10) are fixedly connected with the inner wall of the bearing box (2).
4. The centrifugal pump with a negative pressure structure as set forth in claim 1, wherein: one end of the main shaft body (1) positioned in the suction chamber (6) is rotatably sleeved with a shaft sleeve (11).
5. The centrifugal pump with a negative pressure structure as set forth in claim 1, wherein: the top fixedly connected with pull rod (18) of kelly (16), kelly (16) are close to the fixed cover of one end of bolt (12) and have been connect cutting ferrule (17), the cover is equipped with spring (19) on kelly (16), the both ends of spring (19) respectively with cutting ferrule (17) and fixture block (15) fixed connection.
6. The centrifugal pump with a negative pressure structure as set forth in claim 1, wherein: the suction chamber (6) is fixedly connected with the middle bracket (3) through a fastening bolt (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121934085.2U CN216008910U (en) | 2021-08-18 | 2021-08-18 | Centrifugal pump with negative pressure structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121934085.2U CN216008910U (en) | 2021-08-18 | 2021-08-18 | Centrifugal pump with negative pressure structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216008910U true CN216008910U (en) | 2022-03-11 |
Family
ID=80588093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121934085.2U Active CN216008910U (en) | 2021-08-18 | 2021-08-18 | Centrifugal pump with negative pressure structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216008910U (en) |
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2021
- 2021-08-18 CN CN202121934085.2U patent/CN216008910U/en active Active
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