CN211230956U - Sawtooth spiral sealing device of centrifugal pump - Google Patents
Sawtooth spiral sealing device of centrifugal pump Download PDFInfo
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- CN211230956U CN211230956U CN201922249589.XU CN201922249589U CN211230956U CN 211230956 U CN211230956 U CN 211230956U CN 201922249589 U CN201922249589 U CN 201922249589U CN 211230956 U CN211230956 U CN 211230956U
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- balance
- centrifugal pump
- sleeve
- pump
- spiral
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Abstract
A zigzag spiral sealing device of a centrifugal pump comprises a last-stage guide vane, a balance shaft sleeve, a balance sleeve, a discharge section, an inner hexagon bolt and a pump shaft, wherein the last-stage guide vane is fixedly connected to the impeller side in the discharge section of the water pump through the inner short hexagon bolt; it is characterized in that a sawtooth spiral groove is processed on the matching surface of the balance shaft sleeve and the balance sleeve. The spiral guide of the zigzag spiral groove points to the center of an inner impeller of the centrifugal pump. The utility model discloses a zigzag helicla flute self sealss structure has prevented the liquid leakage of centrifugal pump shaft and casing department, has reduced the volumetric loss of the pump body, has improved the efficiency of centrifugal pump, good reliability, and the leakproofness is stable.
Description
Technical Field
The utility model relates to a sealing device especially relates to a centrifugal pump zigzag spiral sealing device.
Background
At present, in large and medium centrifugal pumps used in various industries, the shaft and the casing of the centrifugal pump are sealed by adopting a sealing mode of a shaft sleeve and a packing ring. Because the narrow and small clearance between the shaft and the shaft sleeve is not sealed, and in addition, the sealing failure of the packing ring is caused by the reasons of temperature, friction and the like in the use process, the leakage of fluid in the pump is easily caused, and the efficiency of the centrifugal pump is reduced. In practical application, although the sealing effect of the spiral rectangular structure on the shaft sleeve is much better than that of a sealing mode of a packing ring additionally arranged on the shaft sleeve, the sealing effect cannot meet the ideal requirement due to the structure.
Disclosure of Invention
In order to solve the defects of the prior art, the utility model aims at providing an improve centrifugal pump work efficiency, good reliability, the stable centrifugal pump zigzag spiral sealing device of leakproofness.
Realize the utility model discloses a technical scheme that the purpose adopted is: a zigzag spiral sealing device of a centrifugal pump comprises a last-stage guide vane, a balance shaft sleeve, a balance sleeve, a discharge section, an inner hexagon bolt and a pump shaft, wherein the last-stage guide vane is fixedly connected to the impeller side in the discharge section of the water pump through a short inner hexagon bolt; it is characterized in that a sawtooth spiral groove is processed on the matching surface of the balance shaft sleeve and the balance sleeve.
The spiral guide of the zigzag spiral groove points to the center of an inner impeller of the centrifugal pump.
The utility model has the advantages that: the utility model discloses a zigzag helicla flute self sealss structure has prevented the liquid leakage of centrifugal pump shaft and casing department, has reduced the volumetric loss of the pump body, has improved the efficiency of centrifugal pump, good reliability, and the leakproofness is stable. Meanwhile, the device has the characteristics of long service life, simple structure, convenience in processing and the like. Has the functions of throttling, reducing pressure and improving efficiency.
Drawings
Fig. 1 is a sectional structure view of the zigzag spiral sealing device of the centrifugal pump of the present invention.
Detailed Description
In the attached drawings, the utility model relates to a zigzag spiral sealing device of centrifugal pump, the device includes last stator, balanced axle sleeve, balanced cover, spit section, hexagon socket head cap screw, pump shaft, last stator 1 lean on short hexagon socket head cap screw 2 fixed connection to the impeller side in water pump spit section 5, balanced cover 4 lean on long hexagon socket head cap screw fixed 6 to be connected in the hole of water pump spit section 5, fixedly connected with balanced axle sleeve 3 on the pump shaft 7 of the corresponding department with balanced cover 4, there is fit clearance balanced axle sleeve 3 and balanced cover 4 cooperation department; the balance shaft sleeve is characterized in that a sawtooth-shaped spiral groove 8 is processed on the matching surface of the balance shaft sleeve 3 and the balance sleeve 4. The spiral guide of the zigzag spiral groove 8 points to the center of an impeller in the centrifugal pump, and leaked liquid is pushed to the side of a high-pressure cavity by the spiral guide. The zigzag spiral seal belongs to a non-contact water conservancy throttling seal, when the pump shaft drives the balance shaft sleeve to rotate, the liquid flow leaked by the liquid at the positions of the pump shaft and the shell is pushed back into the high-pressure cavity of the centrifugal pump again under the guiding action of the zigzag spiral groove on the pump shaft, so that the liquid leakage at the positions of the centrifugal pump shaft and the shell is prevented, the volume loss of a pump body is reduced, the efficiency of the centrifugal pump is improved, the reliability is good, and the sealing performance is stable. Meanwhile, the device has the characteristics of long service life, simple structure, convenience in processing and the like. Has the functions of throttling, reducing pressure and improving efficiency. The transition structure is particularly suitable for the transition structure from the discharge section of the single-suction multistage energy-saving centrifugal pump to the balance chamber.
Claims (2)
1. A zigzag spiral sealing device of a centrifugal pump comprises a last-stage guide vane, a balance shaft sleeve, a balance sleeve, a discharge section, an inner hexagon bolt and a pump shaft, wherein the last-stage guide vane (1) is fixedly connected to the impeller side in a water pump discharge section (5) through a short inner hexagon bolt (2), the balance sleeve (4) is fixedly connected to the inner hole of the water pump discharge section (5) through a long inner hexagon bolt (6), the balance shaft sleeve (3) is fixedly connected to a pump shaft (7) at a position corresponding to the balance sleeve (4), and a fit gap exists at a fit position of the balance shaft sleeve (3) and the balance sleeve (4); the method is characterized in that: the matching surface of the balance shaft sleeve (3) and the balance sleeve (4) is provided with a sawtooth spiral groove (8).
2. The centrifugal pump zigzag spiral seal apparatus of claim 1 wherein: the spiral guide of the sawtooth-shaped spiral groove (8) points to the center of an inner impeller of the centrifugal pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922249589.XU CN211230956U (en) | 2019-12-06 | 2019-12-06 | Sawtooth spiral sealing device of centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922249589.XU CN211230956U (en) | 2019-12-06 | 2019-12-06 | Sawtooth spiral sealing device of centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211230956U true CN211230956U (en) | 2020-08-11 |
Family
ID=71933199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922249589.XU Active CN211230956U (en) | 2019-12-06 | 2019-12-06 | Sawtooth spiral sealing device of centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211230956U (en) |
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2019
- 2019-12-06 CN CN201922249589.XU patent/CN211230956U/en active Active
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