CN110848141B

CN110848141B - Magnetic centrifugal pump with good sealing structure

Info

Publication number: CN110848141B
Application number: CN201911105010.0A
Authority: CN
Inventors: 刘为峰
Original assignee: Jiangsu Fangshiyuanlue Technology Consulting Co ltd
Current assignee: Taicang Shenzhou chemical anti-corrosion equipment Co.,Ltd.
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2021-04-06
Anticipated expiration: 2039-11-07
Also published as: CN110848141A

Abstract

A magnetic centrifugal pump with a good sealing structure comprises a pump body, a static ring, an impeller, a rear sealing ring, a thrust ring, a bearing, a shaft sleeve, a bearing body, an external magnetic steel assembly, a separation sleeve, an internal magnetic steel assembly, a cooling box, a shaft, a connecting frame and a leakage sensor, wherein one end of the shaft is connected with the internal magnetic steel assembly, the other end of the shaft extends into the pump body to be connected with the impeller, the leakage sensor is arranged on the connecting frame, and a cooling water inlet pipe and a cooling water outlet pipe are arranged on the cooling box. According to the magnetic centrifugal pump with the good sealing structure, when the medium leaks, the liquid leakage sensor can transmit the medium leakage information to the control equipment, and the power supply is cut off to stop the pump from running; meanwhile, the leakage information of the isolation sleeve is transmitted to the mobile phone of the related personnel through the wireless network, and the instruction sound is sent out, so that the related personnel can know, process and repair the equipment in time, and the accident is avoided.

Description

Magnetic centrifugal pump with good sealing structure

Technical Field

The invention belongs to the technical field of centrifugal pumps, and particularly relates to a magnetic centrifugal pump with a good sealing structure.

Background

The magnetic centrifugal pump is different from a traditional sealing pump, a motor shaft is not directly connected with a pump shaft, but the motor shaft drives an outer magnetic rotor to rotate, the outer magnetic rotor and an inner magnetic rotor are matched to drive the inner magnetic rotor to rotate through magnetic force, and the inner magnetic rotor drives the pump shaft to rotate, so that an impeller rotor on the pump shaft rotates to work. The magnetic centrifugal pump has the advantages that the sealing cavity formed by the isolating sleeve is arranged between the inner magnetic rotor and the outer magnetic rotor, the pump shaft and the inner magnetic rotor are sealed in the sealing cavity, liquid can be prevented from leaking from the end of the pump shaft to the outside, and the pump shaft and the inner magnetic rotor can be cooled, so that the excellent leakage-free characteristic can be obtained without adopting the traditional dynamic sealing for the pump shaft, the magnetic centrifugal pump is widely used for conveying various dangerous media such as severe toxicity, flammability, explosiveness and the like, and plays an important role in the fields of petroleum, chemical industry, medicine, nuclear power, national defense and the like.

Because the sliding bearing of the inner support pump shaft of the magnetic centrifugal pump is lubricated by using the conveyed process fluid, the process fluid is often poor in lubricity, and then in a production environment, the conditions that liquid in the pump is pumped out or reduced and the like are often met, so that idle running is generated, which is commonly called dry grinding, and the sliding bearing is rapidly heated in a short time and the abrasion between the sliding bearing and the pump shaft is accelerated; in addition, when the magnetic centrifugal pump is in idle load, particle impurities exist in a medium or the magnetic centrifugal pump deviates from a flow point for use, the sliding bearing can be subjected to dry grinding and crushing, the isolation sleeve is quickly worn through and generates high heat, medium leakage is caused, substances such as toxic, flammable and explosive substances are diffused into the atmosphere, environmental pollution is caused, safety is endangered, and even serious disastrous accidents are caused.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a magnetic centrifugal pump with a good sealing structure, which solves the problem that the magnetic centrifugal pump can be rapidly shut down by alarming when leakage happens carelessly in the using process.

The technical scheme is as follows: the invention provides a magnetic centrifugal pump with a good sealing structure, which comprises a pump body, a static ring, an impeller, a rear sealing ring, a thrust ring, a bearing, a shaft sleeve, a bearing body, an outer magnetic steel assembly, an isolation sleeve, an inner magnetic steel assembly, a cooling box, a shaft, a connecting frame and a leakage sensor, wherein the pump body is connected with the connecting frame through bolts, the impeller is arranged in a cavity surrounded by the pump body and the connecting frame, the static ring is arranged between the pump body and the impeller, the rear sealing ring is arranged between the impeller and the bearing body, the thrust ring, the bearing and the shaft sleeve are all sleeved on the shaft, the outer magnetic steel assembly is arranged in the connecting frame, one end of the isolation sleeve is arranged in the outer magnetic steel assembly, the other end of the isolation sleeve is arranged outside the bearing body, the inner magnetic steel assembly is arranged in the isolation sleeve, the cooling box is arranged at one end of the connecting frame far away from the pump body, one end of the shaft is, and the other end of the shaft extends into the pump body to be connected with the impeller, the leakage sensor is arranged on the connecting frame, and the cooling box is provided with a cooling water inlet pipe and a cooling water outlet pipe.

Furthermore, in the magnetic centrifugal pump with the good sealing structure, the sealing assembly is arranged between the pump body and the connecting frame.

Further, foretell magnetic centrifugal pump with good seal structure, seal assembly includes a set of jackscrew, a set of set screw, first sealing washer clamping ring, first sealing washer and sealed maze, jackscrew and link threaded connection, a set of set screw fixes first sealing washer clamping ring on the pump body, first sealing washer and sealed maze all set up on the link to first sealing washer compresses tightly the laminating with the pump body with sealed maze, the terminal surface that the jackscrew stretches into the link is equipped with first inclined plane, the up end of first sealing washer clamping ring is equipped with the second inclined plane, first inclined plane and the laminating of second inclined plane.

Further, foretell magnetic centrifugal pump that has good seal structure, the cross-section of first sealing washer is the V style of calligraphy, sealed labyrinth is including sealed labyrinth body, labyrinth seal and a set of gasket all set up on the outer wall of sealed labyrinth body, the terminal surface laminating of sealed labyrinth body and the pump body, labyrinth seal sets up in the link, the tip that the pump body was kept away from to a set of gasket is laminated with the inner wall of link.

Further, foretell magnetic centrifugal pump with good seal structure, be equipped with a set of metal clamping ring and lower metal clamping ring between first sealing washer and the sealed maze, a set of metal clamping ring sets up under on the metal clamping ring, the metal clamping ring is located the top of maze sealing washer down, a set of metal clamping ring stacks the setting in proper order under on the metal clamping ring, the cross-section of metal clamping ring is the Z style of calligraphy, be equipped with O type sealing washer between the recess of metal clamping ring and the inner wall of link.

Further, foretell magnetic centrifugal pump that has good seal structure, first sealing washer includes first sealing washer body, upper seal ring piece and lower seal ring piece symmetry set up on the outer wall of first sealing washer body, the terminal surface laminating of first sealing washer body and the pump body, the up end of upper seal ring piece and the laminating of the lower terminal surface of first sealing washer clamping ring, the tip that the pump body was kept away from to upper seal ring piece and lower seal ring piece can laminate with the inner wall of link.

The technical scheme shows that the invention has the following beneficial effects: according to the magnetic centrifugal pump with the good sealing structure, when the medium leaks, the liquid leakage sensor can transmit the medium leakage information to the control equipment, and the power supply is cut off to stop the pump from running; meanwhile, the leakage information of the isolation sleeve is transmitted to the mobile phone of the related personnel through the wireless network, and the instruction sound is sent out, so that the related personnel can know, process and repair the equipment in time, and the accident is avoided; in addition, the seal assembly who sets up between the pump body and link can prevent that the impeller of long-term and liquid contact from looking for the part and carrying out the leakage of liquid, through the screw in of jackscrew for the inclined plane can compress tightly first sealing washer clamping ring, first sealing washer and sealed labyrinth, prevents that above-mentioned seal structure is not hard up, causes the seepage, and can prevent because the increase of live time, the seepage that the not hard up of seal element caused, has good sealed antiseep effect.

Drawings

FIG. 1 is a schematic structural view of a magnetic centrifugal pump with a good sealing structure according to the present invention;

FIG. 2 is an enlarged partial view of the magnetic centrifugal pump of the present invention with a good sealing structure;

fig. 3 is a partial enlarged view of the invention at a in fig. 2.

In the figure: the pump body 1, the stationary ring 2, the impeller 3, the rear seal ring 4, the thrust collar 5, the first inclined surface 51, the bearing 6, the shaft sleeve 7, the bearing body 8, the outer magnetic steel assembly 9, the isolation sleeve 10, the inner magnetic steel assembly 11, the cooling box 12, the cooling water inlet pipe 121, the cooling water outlet pipe 122, the shaft 13, the connecting frame 14, the leakage sensor 15, the seal assembly 20, the jackscrew 201, the positioning screw 202, the first seal ring pressing ring 203, the second inclined surface 2031, the first seal ring 204, the seal labyrinth 205, the seal labyrinth body 206, the labyrinth seal ring 207, the seal piece 208, the metal pressing ring 209, the lower metal pressing ring 210, the O-shaped seal ring 211, the first seal ring body 212, the upper seal ring piece 213, the lower seal ring piece 214, the fixing portion 301, the first arc portion 302, the first bent portion 303, the second arc portion 304 and the first through hole.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example one

As shown in fig. 1, the magnetic centrifugal pump with good sealing structure comprises a pump body 1, a stationary ring 2, an impeller 3, a rear sealing ring 4, a thrust ring 5, a bearing 6, a shaft sleeve 7, a bearing body 8, an external magnetic steel assembly 9, an isolation sleeve 10, an internal magnetic steel assembly 11, a cooling tank 12, a shaft 13, a connecting frame 14 and a leakage sensor 15, wherein the pump body 1 and the connecting frame 14 are connected through bolts, the impeller 3 is arranged in a cavity surrounded by the pump body 1 and the connecting frame 14, the stationary ring 2 is arranged between the pump body 1 and the impeller 3, the rear sealing ring 4 is arranged between the impeller 3 and the bearing body 8, the thrust ring 5, the bearing 6 and the shaft sleeve 7 are all sleeved on the shaft 13, the external magnetic steel assembly 9 is arranged in the connecting frame 14, one end of the isolation sleeve 10 is arranged in the external magnetic steel assembly 9, and the other end of the isolation sleeve 10 is arranged outside the bearing body 8, the internal magnetic steel assembly 11 is arranged in the isolation sleeve 10, the cooling box 12 is arranged at one end, far away from the pump body 1, of the connecting frame 14, one end of the shaft 13 is connected with the inner magnetic steel assembly 11, the other end of the shaft 13 extends into the pump body 1 to be connected with the impeller 3, the leakage sensor 15 is arranged on the connecting frame 14, and the cooling box 12 is provided with a cooling water inlet pipe 121 and a cooling water outlet pipe 122. The leakage sensor 15 transmits leakage alarm information to the server, and equipment faults are timely processed, so that safety accidents are prevented.

Wherein, a sealing component 20 is arranged between the pump body 1 and the connecting frame 14. Sealing assembly 20 includes a set of jackscrew 201, a set of set screw 202, first sealing washer clamping ring 203, first sealing washer 204 and sealed maze 205, jackscrew 201 and link 14 threaded connection, a set of set screw 202 is fixed first sealing washer clamping ring 203 on the pump body 1, first sealing washer 204 and sealed maze 205 all set up on link 14 to first sealing washer 204 compresses tightly the laminating with sealed maze 205 and the pump body 1, the terminal surface that jackscrew 201 stretched into link 14 is equipped with first inclined plane 51, the up end of first sealing washer clamping ring 203 is equipped with second inclined plane 2031, first inclined plane 51 and the laminating of second inclined plane 2031. The cross-section of first sealing washer 204 is the V style of calligraphy, seal labyrinth 205 is including seal labyrinth body 206, labyrinth sealing washer 207 and a set of gasket 208 all set up on the outer wall of seal labyrinth body 206, the terminal surface laminating of seal labyrinth body 206 and the pump body 1, labyrinth sealing washer 207 sets up in link 14, the tip that the pump body 1 was kept away from to a set of gasket 208 is laminated with the inner wall of link 14. Be equipped with a set of metal clamping ring 209 and lower metal clamping ring 210 between first sealing washer 204 and the sealed maze 205, a set of metal clamping ring 209 sets up under on metal clamping ring 210, metal clamping ring 210 is located labyrinth seal 207's top down, a set of metal clamping ring 209 stacks the setting in proper order under on metal clamping ring 210, metal clamping ring 209's cross-section is the Z style of calligraphy, be equipped with O type sealing ring 211 between metal clamping ring 209's the notch and link 14's the inner wall. First sealing washer 204 includes first sealing washer body 212, goes up sealing ring piece 213 and lower sealing ring piece 214, go up sealing ring piece 213 and lower sealing ring piece 214 symmetry and set up on the outer wall of first sealing washer body 212, the terminal surface laminating of first sealing washer body 212 and pump body 1, the up end of going up sealing ring piece 213 and the lower terminal surface laminating of first sealing washer clamping ring 203, the tip that the pump body 1 was kept away from to last sealing ring piece 213 and lower sealing ring piece 214 can laminate with the inner wall of link 14.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.

Claims

1. The utility model provides a magnetic centrifugal pump with good seal structure which characterized in that: comprises a pump body (1), a static ring (2), an impeller (3), a rear sealing ring (4), a thrust ring (5), a bearing (6), a shaft sleeve (7), a bearing body (8), an external magnetic steel assembly (9), an isolation sleeve (10), an internal magnetic steel assembly (11), a cooling box (12), a shaft (13), a connecting frame (14) and a leakage sensor (15), wherein the pump body (1) is connected with the connecting frame (14) through bolts, the impeller (3) is arranged in a cavity surrounded by the pump body (1) and the connecting frame (14), the static ring (2) is arranged between the pump body (1) and the impeller (3), the rear sealing ring (4) is arranged between the impeller (3) and the bearing body (8), the thrust ring (5), the bearing (6) and the shaft sleeve (7) are all sleeved on the shaft (13), the external magnetic steel assembly (9) is arranged in the connecting frame (14), one end of the isolation sleeve (10) is arranged in the outer magnetic steel assembly (9), the other end of the isolation sleeve (10) is arranged outside the bearing body (8), the inner magnetic steel assembly (11) is arranged in the isolation sleeve (10), the cooling box (12) is arranged at one end, far away from the pump body (1), of the connecting frame (14), one end of the shaft (13) is connected with the inner magnetic steel assembly (11), the other end of the shaft (13) extends into the pump body (1) to be connected with the impeller (3), the leakage sensor (15) is arranged on the connecting frame (14), and the cooling box (12) is provided with a cooling water inlet pipe (121) and a cooling water outlet pipe (122);

a sealing component (20) is arranged between the pump body (1) and the connecting frame (14), the sealing assembly (20) comprises a group of jackscrews (201), a group of positioning screws (202), a first sealing ring pressing ring (203), a first sealing ring (204) and a sealing labyrinth (205), the jackscrew (201) is in threaded connection with the connecting frame (14), the first sealing ring pressing ring (203) is fixed on the pump body (1) by the group of positioning screws (202), the first sealing ring (204) and the sealing labyrinth (205) are both arranged on the connecting frame (14), and the first sealing ring (204) and the sealing labyrinth (205) are pressed and attached to the pump body (1), the end face of the jackscrew (201) extending into the connecting frame (14) is provided with a first inclined plane (51), a second inclined surface (2031) is arranged on the upper end surface of the first sealing ring pressing ring (203), and the first inclined surface (51) is attached to the second inclined surface (2031);

the section of the first sealing ring (204) is V-shaped, the sealing labyrinth (205) comprises a sealing labyrinth body (206), a labyrinth sealing ring (207) and a group of sealing sheets (208), the labyrinth sealing ring (207) and the group of sealing sheets (208) are arranged on the outer wall of the sealing labyrinth body (206), the sealing labyrinth body (206) is attached to the end face of the pump body (1), the labyrinth sealing ring (207) is arranged in the connecting frame (14), and the end part, away from the pump body (1), of the group of sealing sheets (208) is attached to the inner wall of the connecting frame (14);

a group of metal pressing rings (209) and a lower metal pressing ring (210) are arranged between the first sealing ring (204) and the sealing labyrinth (205), the group of metal pressing rings (209) are arranged on the lower metal pressing ring (210), the lower metal pressing ring (210) is positioned above the labyrinth sealing ring (207), the group of metal pressing rings (209) are sequentially stacked on the lower metal pressing ring (210), the cross sections of the metal pressing rings (209) are Z-shaped, and O-shaped sealing rings (211) are arranged between the notches of the metal pressing rings (209) and the inner wall of the connecting frame (14);

first sealing washer (204) include first sealing washer body (212), go up sealing ring piece (213) and lower sealing ring piece (214) symmetry setting on the outer wall of first sealing washer body (212), the terminal surface laminating of first sealing washer body (212) and the pump body (1), the up end of going up sealing ring piece (213) and the lower terminal surface laminating of first sealing ring clamping ring (203), the tip that the pump body (1) was kept away from to last sealing ring piece (213) and lower sealing ring piece (214) can laminate with the inner wall of link (14).