CN218151676U - High-efficiency shield pump capable of reducing cavitation erosion - Google Patents

Abstract

The utility model provides a can reduce high-efficient canned motor pump of cavitation erosion belongs to the water pump field. It has been solved thereby current canned motor pump receives the cavitation to influence and causes the problem of spare part damage. This can reduce high-efficient canned motor pump of cavitation erosion, including the canned motor pump shell that has inlet port and outlet port and be located canned motor pump shell's impeller subassembly, it is provided with the buffering subassembly that is used for reducing the rivers impact force to be located canned motor pump shell inlet port department, the buffering subassembly by be located inlet port department and with the inside buffer tube that is connected of canned motor pump shell, a plurality of lie in on the internal perisporium of buffer tube and be used for rivers buffering choked flow's buffer block and be located buffer tube inlet port department and outlet port department respectively buffer unit one and buffer unit two are constituteed. The utility model has the advantages of reducing cavitation and prolonging service life.

Description

High-efficiency shield pump capable of reducing cavitation erosion

Technical Field

The utility model belongs to the water pump field relates to a canned motor pump, in particular to can reduce high-efficient canned motor pump of cavitation erosion.

Background

The conventional centrifugal pump is driven by connecting an impeller shaft of the pump with an electric shaft through a coupling so that the impeller and the motor rotate together to work, while the canned pump is a sealless pump, and the pump and a driving motor are both sealed in a pressure vessel filled with a pumped medium, the pressure vessel is only provided with static seals, and a rotating magnetic field is provided by an electric wire set and drives a rotor.

When the liquid is at a low temperature or when the liquid leaks, the pressure of the liquid decreases, bubbles are formed near the surface of the solid in contact with the liquid, and the gas dissolved in the liquid may be precipitated and formed into bubbles, which is called cavitation. The process of generating bubbles and breaking the bubbles by the shield pump is the cavitation process of the water pump, and the protective film on the metal surface is damaged under the action of mechanical denudation and electrochemical corrosion, so that the corrosion speed is accelerated, and the service life of the shield pump is seriously influenced.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a can reduce the high-efficient canned motor pump of cavitation erosion, solve above problem.

The purpose of the utility model can be realized by the following technical proposal: a can reduce the high-efficient canned motor pump of cavitation erosion, including the canned motor pump shell with water inlet port and water outlet port and impeller assembly located in canned motor pump shell, characterized by that, locate at the water inlet port of canned motor pump shell and be provided with the buffer unit used for reducing the impact force of water flow, the said buffer unit is located in water inlet port and buffer tube connected with canned motor pump shell inside, several buffer blocks used for water flow buffering choked flow located on inner peripheral wall of buffer tube and located in buffer tube water inlet separately and buffer unit one and buffer unit two of water outlet;

buffer unit one by be located buffer cylinder water inlet department and be used for rivers to cushion the reposition of redundant personnel piece and a plurality of be located the flow distribution plate outer edge and with buffer cylinder water inlet department interior week splice bar that links firmly mutually constitute, be located the flow distribution plate on be provided with the outside arch of a plurality of axial and be the flange portion of semicircle type structure, a plurality of flange portion on all set up the through-hole that supplies rivers to pass through, buffer unit two because be located buffer cylinder water outlet department and supply the reposition of redundant personnel ring that the circulation passed through and a plurality of be located the outer edge of reposition of redundant personnel ring and with buffer cylinder water outlet department interior week splice bar two of linking firmly mutually constitute.

In the above-mentioned high-efficient canned motor pump that can reduce cavitation erosion, impeller subassembly adopt ultrasonic welding firmly and do not have the welding in the runner and form deckle edge, just impeller subassembly inside and outside surface all plated the chromium-plated layer that has the corrosion of preventing cavitation erosion.

In foretell high-efficient canned motor pump of reducible cavitation, a plurality of the buffer block in proper order the interval and be heliciform dislocation structure along its buffer cylinder the central axis and distribute on the internal perisporium of buffer cylinder, a plurality of the buffer block and the internal perisporium of buffer cylinder set up for integrated into one piece structure, and a plurality of the buffer block cross section all be fan-shaped structure setting.

In foretell high-efficient canned motor pump of reducible cavitation, buffer cylinder water inlet department form the reposition of redundant personnel hole that a plurality of supplied water stream circulated through the cooperation of a plurality of splice bar one, reposition of redundant personnel piece and buffer cylinder internal perisporium, buffer cylinder water outlet department form the reposition of redundant personnel hole that a plurality of supplied water stream circulated through the cooperation of a plurality of splice bar two, reposition of redundant personnel ring and buffer cylinder internal perisporium.

In the efficient canned motor pump capable of reducing cavitation erosion, the plurality of flange parts are distributed at intervals along the upper end face of the flow distribution plate, and the flange parts are integrally formed by adopting cavitation erosion resistant graphite cast iron.

In foretell can reduce high-efficient canned motor pump of cavitation erosion, be located canned motor pump shell in be provided with impeller component and cooperate and play the sealing ring of sealed effect, canned motor pump shell for integrated into one piece structure setting, and be located canned motor pump shell internal perisporium on all scribble and be used for reducing and prevent the chromium coating of cavitation erosion.

Compared with the prior art, the high-efficiency shield pump capable of reducing cavitation erosion has the following advantages:

1. the high-efficiency shielding pump capable of reducing cavitation erosion is provided with the buffering assembly, and the impeller assembly can effectively reduce the vibration of the surface in contact with liquid through the structure of the buffering assembly so as to reduce the occurrence of water hammer, reduce the occurrence of cavitation erosion and prolong the service life of the shielding pump;

2. this can reduce impeller subassembly surface in the high-efficient canned motor pump of cavitation erosion and all scribble the chromium-plated layer that is used for preventing the cavitation on the internal perisporium of canned motor pump shell, improved the anti cavitation erosion function of impeller subassembly and canned motor pump shell internal perisporium, the effectual cavitation phenomenon that has reduced takes place and has improved canned motor pump's life.

Drawings

FIG. 1 is a schematic diagram of a half-section structure of an efficient canned motor pump with cavitation reduction.

FIG. 2 is a perspective view of a buffer assembly of the present efficient canned motor pump with cavitation reduction.

FIG. 3 is a perspective view of a buffer assembly of the present efficient canned motor pump with cavitation reduction.

Fig. 4 is a schematic view of a part a of the enlarged structure of fig. 1.

In the figure, 1, a shield pump housing; 2. a water inlet port; 3. a water outlet port; 4. a buffer cylinder; 5. a buffer block; 6. a shunting block; 7. connecting a first rib; 8. a flange portion; 9. a through hole; 10. a shunt ring; 11. connecting ribs II; 12. an impeller assembly; 13. a shunt hole; 14. and (6) sealing rings.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3, and 4, the high-efficiency shield pump capable of reducing cavitation erosion includes a shield pump housing 1 having a water inlet 2 and a water outlet 3, and an impeller assembly 12 located in the shield pump housing 1, wherein a buffer assembly for reducing impact force of water flow is disposed at the water inlet 2 of the shield pump housing 1, and the buffer assembly includes a buffer cylinder 4 located at the water inlet 2 and connected to the inside of the shield pump housing 1, a plurality of buffer blocks 5 located on the inner peripheral wall of the buffer cylinder 4 and used for buffering and blocking water flow, and a first buffer unit and a second buffer unit located at the water inlet and the water outlet of the buffer cylinder 4, respectively;

buffer unit one by be located buffer cylinder 4 water inlet department and be used for the reposition of redundant personnel of rivers buffering reposition of redundant personnel piece 6 and a plurality of be located the outer edge of flow distribution plate and constitute with the splice bar 7 that the inner peripheral wall of buffer cylinder 4 water inlet department links firmly mutually, be located the flange portion 8 that is provided with the outside arch of a plurality of axial and be semicircle type structure on the flow distribution plate, a plurality of flange portion 8 on all set up the through-hole 9 that supplies rivers to pass through, buffer unit two is owing to be located buffer cylinder 4 water outlet department and supply water the flow through the split ring 10 and a plurality of be located the outer edge of split ring 10 and constitute with the splice bar two 11 that buffer cylinder 4 water outlet department inner peripheral wall links firmly mutually, can effectively realize impeller subassembly 12 through this buffer assembly structure and reduce the vibration with the surface of liquid contact to reduce the emergence of water hammer phenomenon, thereby reduce the cavitation emergence, thereby improve the life of canned motor pump.

In a further elaboration, the impeller assembly 12 is firmly welded by ultrasonic waves, burrs are formed in the flow channel without welding, chromium coatings capable of preventing cavitation corrosion are plated on the inner surface and the outer surface of the impeller assembly 12, the inner surface and the outer surface of the impeller assembly 12 are smooth, smooth and glossy, water flow circulation is facilitated, and the chromium coatings are plated on the inner circumferential wall, so that cavitation corrosion is effectively reduced, and the service life of the impeller assembly 12 is prolonged.

Further saying in detail, in order to reduce the rivers impact force and make its rivers circulate smoothly, a plurality of buffer block 5 interval in proper order and be heliciform dislocation structure along 4 central axes of its buffer cylinder and distribute on 4 internal perisporium of buffer cylinder, a plurality of buffer block 5 and 4 internal perisporium of buffer cylinder are the setting of integrated into one piece structure, and 5 cross sections of a plurality of buffer block all are fan-shaped structure setting, and this structure can effectively realize rivers buffering effect and make its rivers circulate steadily.

Further saying in detail, for the dispersion rivers impact force, buffer cylinder 4 water inlet department is through a plurality of splice bar 7, shunt block 6 forms the reposition of redundant personnel hole 13 that a plurality of supplied water stream circulated with the cooperation of 4 internal perisporium of buffer cylinder, 4 water outlet departments of buffer cylinder are through a plurality of splice bar two 11, shunt ring 10 forms the reposition of redundant personnel hole 13 that a plurality of supplied water stream circulated with the cooperation of 4 internal perisporium of buffer cylinder, this structure can effectively reduce rivers impact force and make its rivers steadily circulate, not only prevent that impeller subassembly 12 from causing the damage by the rivers impact, the emergence of cavitation phenomenon has still been prevented.

Further saying, in order to prevent that shielding pump case 1 is inside to receive the cavitation erosion influence, a plurality of flange portion 8 is along its flow distribution plate up end interval distribution, and flange portion 8 all adopts cavitation erosion resistant graphite cast iron integrated into one piece, be located and be provided with in shielding pump case 1 and cooperate and play the sealing ring 14 of sealed effect with impeller subassembly 12, shielding pump case 1 sets up for the integrated into one piece structure, and all scribble the chromium coating that is used for reducing and prevents the cavitation erosion on being located shielding pump case 1 internal perisporium.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the shield pump housing 1, the water inlet port 2, the water outlet port 3, the buffer cylinder 4, the buffer block 5, the diverter block 6, the first connecting rib 7, the flange portion 8, the through hole 9, the diverter ring 10, the second connecting rib 11, the impeller assembly 12, the diverter hole 13, the seal ring 14, etc. are used more often, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any one of the additional limitations of the present invention.

Claims (6)

1. A high-efficiency shielding pump capable of reducing cavitation erosion comprises a shielding pump shell (1) with a water inlet port (2) and a water outlet port (3) and an impeller component (12) positioned in the shielding pump shell (1), and is characterized in that a buffering component for reducing water flow impact force is arranged at the water inlet port (2) of the shielding pump shell (1), and the buffering component consists of a buffering cylinder (4) which is positioned at the water inlet port (2) and is connected with the inside of the shielding pump shell (1), a plurality of buffering blocks (5) which are positioned on the inner peripheral wall of the buffering cylinder (4) and are used for buffering and flow blocking of water flow, and a first buffering unit and a second buffering unit which are respectively positioned at the water inlet and the water outlet of the buffering cylinder (4);

buffer unit one by be located buffer cylinder (4) water inlet department and be used for rivers to cushion reposition of redundant personnel piece (6) and a plurality of be located the flow distribution plate outer edge and constitute with the splice bar (7) that buffer cylinder (4) water inlet department links firmly mutually in the inner peripheral wall, be located the flow distribution plate on be provided with a plurality of axial outside protruding and flange portion (8) that are semicircle type structure, a plurality of flange portion (8) on all set up through-hole (9) that supply rivers to pass through, buffer unit two because be located buffer cylinder (4) water outlet department and supply that rivers pass through reposition of redundant personnel ring (10) and a plurality of be located reposition of redundant personnel ring (10) outward flange department and constitute with two (11) of splice bar that buffer cylinder (4) water outlet department inner peripheral wall linked firmly mutually.

2. The canned motor pump as claimed in claim 1, wherein the impeller assembly (12) is welded firmly by ultrasonic welding without burrs in the flow channel, and the inner and outer surfaces of the impeller assembly (12) are coated with chromium plating for preventing cavitation corrosion.

3. The shielding pump as claimed in claim 1, wherein the plurality of buffer blocks (5) are sequentially spaced and distributed on the inner peripheral wall of the buffer cylinder (4) along the central axis of the buffer cylinder (4) in a spiral staggered structure, the plurality of buffer blocks (5) and the inner peripheral wall of the buffer cylinder (4) are integrally formed, and the cross section of each of the plurality of buffer blocks (5) is in a fan-shaped structure.

4. The shielding pump capable of reducing cavitation erosion as claimed in claim 1, wherein the water inlet of the buffer cylinder (4) is provided with a plurality of first connecting ribs (7), a plurality of shunting blocks (6) and the inner peripheral wall of the buffer cylinder (4) to cooperate to form a plurality of shunting holes (13) for water flow circulation, and the water outlet of the buffer cylinder (4) is provided with a plurality of second connecting ribs (11), a plurality of shunting rings (10) and the inner peripheral wall of the buffer cylinder (4) to cooperate to form a plurality of shunting holes (13) for water flow circulation.

5. A canned motor pump according to claim 1, characterized in that several flange portions (8) are spaced apart along the upper end surface of the splitter plate, and the flange portions (8) are integrally formed of graphite cast iron resistant to cavitation.

6. The canned motor pump according to claim 1, wherein a sealing ring (14) is disposed in the canned motor pump housing (1) and cooperates with the impeller assembly (12) to achieve a sealing effect, the canned motor pump housing (1) is formed as an integral structure, and the inner peripheral wall of the canned motor pump housing (1) is coated with a chromium coating for reducing and preventing cavitation erosion.

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