CN209976805U - Non-sealing high-efficiency single-stage coaxial centrifugal pump - Google Patents
Non-sealing high-efficiency single-stage coaxial centrifugal pump Download PDFInfo
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- CN209976805U CN209976805U CN201920624479.4U CN201920624479U CN209976805U CN 209976805 U CN209976805 U CN 209976805U CN 201920624479 U CN201920624479 U CN 201920624479U CN 209976805 U CN209976805 U CN 209976805U
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Abstract
The utility model relates to a centrifugal water pump equipment technical field, in particular to there is not high-efficient single-stage coaxial centrifugal pump of sealing, the rotor part of the housing part and impeller nut, impeller and motor shaft constitution including the pump body, pump cover, preceding seal ring part constitution, rotor part and housing part between be equipped with the damping compensator, motor shaft connecting motor, motor shaft and impeller coaxial coupling, the rotor part on be equipped with the rotor guard plate. The utility model has the advantages that: high efficiency, stability, easy maintenance and economy.
Description
Technical Field
The utility model relates to a centrifugal water pump equipment technical field, in particular to there is not sealed high-efficient single-stage coaxial centrifugal pump.
Background
The existing single-stage centrifugal pump is the most widely used centrifugal pump, the pump is provided with a front sealing ring and a rear sealing ring, the impeller is provided with a balance hole, and the axial force generated by the impeller is balanced through the combined action of the front sealing ring, the rear sealing ring and the balance hole. Mechanical seals are provided to prevent axial leakage of the rotor.
Structural defects: when the balance hole, the front sealing ring and the rear sealing ring structure balance the axial force, a large amount of backflow of the balance hole is caused, and more leakage loss of the mouth ring is generated. Meanwhile, after the balance hole balances the axial force, residual axial force is generated and needs to be borne by the thrust bearing. When the working condition changes or the gap of the opening ring is increased, the axial force is increased, and hidden danger is caused to the safe and stable operation of the pump. The mechanical sealing device increases the mechanical efficiency loss of the pump, and meanwhile, the sealing and flushing system of the pump needs a large amount of external water supply sources for cooling, so that the energy consumption is high.
Disclosure of Invention
In order to solve the problems of the prior art, the utility model provides a simple structure, can improve the high-efficient single-stage coaxial centrifugal pump of no seal of pump efficiency.
The technical scheme of the utility model as follows:
the utility model provides a do not have high-efficient single-stage coaxial centrifugal pump of sealing, includes the pump body, pump cover, the rotor part that the housing part and the impeller nut, impeller and motor shaft that preceding seal ring part is constituteed, rotor part and housing part between be equipped with the damping compensator, motor shaft connecting motor, motor shaft and impeller coaxial coupling, the rotor part on be equipped with the rotor guard plate, the damping compensator include vice A of friction, the vice B of friction, one side of the vice A of friction be equipped with the buffer seal pad A, the opposite side of buffer seal pad A be equipped with sealing washer A, one side of the vice B of friction be equipped with the buffer seal pad B, the opposite side of buffer seal pad B be equipped with spring assembly, spring assembly on be equipped with the locating pin, one side of spring assembly be equipped with sealing washer B.
And a front cover plate and a rear cover plate are arranged on two sides of the pump cover.
The utility model provides a beneficial effect that technical scheme brought is:
high efficiency: the pump impeller is a balance-free water hole type high-efficiency impeller, so that the efficiency loss caused by the backflow of a balance hole is eliminated, meanwhile, after the damping compensator replaces an impeller opening ring, the impeller rear cover plate reduces a large part of the friction loss of a disc, and the overall efficiency of the pump is generally improved on the basis of conventional products (particularly suitable for low-specific-speed centrifugal pumps).
And II, stability: the shaft is stretched short, and the rigidity of axle is good, and pump package stability greatly improves: because no sealing device is arranged, the axial space of the pump is compressed by 80-150 lengths, and the length L value of the rotor part of the pump is reduced by about 30-50%. Therefore, the strength of the pump rotor is improved, and the pump set runs more stably.
Three maintenance simplicity: the pump with the structure eliminates mechanical seal, the pump structure is simpler, and the equipment maintenance scheme is greatly simplified.
Fourthly, the economy is as follows: the pump has wide application range. The special damping compensator is widely suitable for single-stage centrifugal pumps, and the products are widely applied to agriculture, petroleum, chemical industry, electric power, food and other industries.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the damping compensator of the present invention.
Fig. 3 is a schematic structural view of the motor shaft and the impeller of the present invention being coaxial.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1-3, a sealless high-efficiency single-stage coaxial centrifugal pump includes a pump body 1, a pump cover 3, a housing component composed of a front seal ring component 2, a rotor component composed of an impeller nut 4, an impeller 6 and a motor shaft 7, a damping compensator 5 is arranged between the rotor component and the housing component, the motor shaft 7 is connected with a motor 10, the motor shaft 7 is coaxially connected with the impeller 6, the rotor component is provided with a rotor guard plate 8, the damping compensator 5 includes a friction pair a12 and a friction pair B11, the friction pair a12 and the friction pair B11 play roles of preventing medium leakage and balancing axial force, one side of the friction pair a12 is provided with a cushion gasket a13, the other side of the cushion gasket a13 is provided with a seal ring a14, one side of the friction pair B11 is provided with a cushion gasket B16, the other side of the cushion gasket B16 is provided with a spring assembly 15, the spring assembly 15 is used for giving friction pair A12, the vice B11 pretightning force of friction to produce damping force, spring assembly 15 on be equipped with locating pin 17, play the location rotation-proof effect, one side of spring assembly 15 be equipped with sealing washer B18.
And a front cover plate 9 and a rear cover plate 19 are arranged on two sides of the pump cover 3.
After the impeller 6 rotates, the impeller 6 boosts the sucked water and then the water outlet is ejected, at the moment, pressure is generated on the front cover plate 9 and the rear cover plate 19, and due to the fact that the front cover plate 9 and the rear cover plate 19 are different in structure and area, the front cover plate and the rear cover plate are caused to have pressure difference, and axial force is generated.
Under the action of the front sealing ring 2 and the damping compensator 5, the axial force generated by the front cover plate and the rear cover plate is eliminated. While eliminating the leakage loss of conventional balance holes.
The tightness of the damping compensator 5 plays an axial sealing role. Preventing axial medium leakage.
Because the area between the rear cover plate damping compensator and the shaft diameter is not filled with medium, the friction loss of a part of discs of the rear cover plate 19 is eliminated. Further improving the efficiency of the pump.
The motor shaft 7 and the impeller 6 are coaxially connected (directly connected), so that the rigidity and the operation stability of the pump rotor are improved, and the reliability of the pump is greatly improved.
Mounting position of damping compensator 5: the damping compensator 5 replaces the original impeller eye or vane bushing position or the casing interstage bushing position. The installation position is the same as the original impeller collar position or the guide vane bushing position or the casing interstage jacketed position.
Cushion seal a13, seal a14, spring assembly 15 and cushion seal B16 function to seal and reduce impact forces.
The sealing ring A14, the spring assembly 15, the buffer sealing gasket B16 and the positioning pin 17 are static sealing elements.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (2)
1. The utility model provides a high-efficient single-stage coaxial centrifugal pump of no seal, includes the pump body, pump cover, the rotor part that the housing part and the impeller nut of preceding seal ring part constitution, impeller and motor shaft are constituteed, its characterized in that, rotor part and housing part between be equipped with the damping compensator, motor shaft coupling motor, motor shaft and impeller coaxial coupling, the rotor part on be equipped with the rotor guard plate, the damping compensator include vice A of friction, the vice B of friction, one side of the vice A of friction be equipped with the buffer seal pad A, the opposite side of the sealed A of buffer seal be equipped with sealing washer A, one side of the vice B of friction be equipped with the sealed B of buffer seal, the opposite side of the sealed B of buffer be equipped with spring assembly, spring assembly on be equipped with the locating pin, one side of spring assembly be equipped with sealing washer B.
2. The sealless high efficiency single stage coaxial centrifugal pump according to claim 1, wherein the pump cover has a front cover plate and a back cover plate on both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920624479.4U CN209976805U (en) | 2019-04-30 | 2019-04-30 | Non-sealing high-efficiency single-stage coaxial centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920624479.4U CN209976805U (en) | 2019-04-30 | 2019-04-30 | Non-sealing high-efficiency single-stage coaxial centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209976805U true CN209976805U (en) | 2020-01-21 |
Family
ID=69260924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920624479.4U Active CN209976805U (en) | 2019-04-30 | 2019-04-30 | Non-sealing high-efficiency single-stage coaxial centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209976805U (en) |
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2019
- 2019-04-30 CN CN201920624479.4U patent/CN209976805U/en active Active
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