CN210343830U - Cold insulation magnetic pump - Google Patents

Abstract

The utility model discloses a cold insulation magnetic pump, which comprises a pump body, wherein a pump shaft is arranged on the pump body, an impeller is arranged at the front end part of the pump shaft, a magnetic driver is arranged at the rear end part of the pump shaft, a mechanical seal and a sliding bearing assembly are arranged on the pump shaft, and the mechanical seal is positioned between the impeller and the sliding bearing assembly; the mechanical seal comprises a movable ring and a stationary ring, an annular groove is formed in the periphery of the stationary ring, an O-shaped ring is arranged in the groove, a gland is connected to the outer side of the stationary ring, the O-shaped ring is arranged between the stationary ring and the gland, and the gland is fixedly connected with the pump body through a first bolt. The utility model discloses increase one mechanical seal on the basis of magnetic pump, avoid the medium and the slide bearing direct contact of carrying, prevent that slide bearing is cracked, set up the cavity between mechanical seal and slide bearing assembly to input lubricated liquid in the cavity, avoid slide bearing dry grinding, prolong slide bearing's life.

Description

Cold insulation magnetic pump

Technical Field

The utility model relates to a magnetic drive pump specifically is a cold insulation magnetic drive pump.

Background

The flow passing part of the CQB series magnetic pump is made of all stainless steel materials, has good corrosion resistance to organic acid, organic compounds, alkali, neutral solution and various mixed solvents, and the combination of the double-spiral-groove sliding bearing has strong wear resistance, so that the service life of the product is ensured, and the magnetic transmission structure ensures no leakage.

When toxic and corrosive media are conveyed, a leakage-free magnetic pump is often selected for conveying, but the media need a very low-temperature conveying environment.

Fig. 1 is a schematic diagram of a magnetic pump in the prior art for delivering low-temperature toxic and corrosive media, in which a sliding bearing assembly 5 is directly connected with a pump cavity in a contact manner, so that the delivered media is in contact with the sliding bearing assembly 5, and the sliding bearing becomes more brittle and very easy to crack under the extremely low-temperature environment, which on one hand easily causes machine halt and renovation and is time-consuming and labor-consuming, on the other hand, increases the cost and reduces the delivery efficiency. Meanwhile, the sliding bearing usually utilizes the conveyed medium to realize the lubrication function during working, but the lubrication performance of the general conveyed medium is insufficient, so that the sliding bearing is seriously abraded, and the service life of the sliding bearing is shortened.

SUMMERY OF THE UTILITY MODEL

For solving the defect of above-mentioned prior art, the utility model provides a cold insulation magnetic drive pump, the utility model discloses increase one mechanical seal on the basis of magnetic drive pump, avoid the medium of carrying and slide bearing direct contact, prevent that slide bearing is cracked, set up the cavity between mechanical seal and slide bearing assembly to input lubricated liquid in the cavity, avoid slide bearing dry grinding, extension slide bearing's life.

In order to achieve the technical purpose, the utility model adopts the following technical scheme: a cold insulation magnetic pump comprises a pump body, wherein a pump shaft is installed on the pump body, an impeller is installed at the front end of the pump shaft, a magnetic driver is installed at the rear end of the pump shaft, a mechanical seal and a sliding bearing assembly are arranged on the pump shaft, and the mechanical seal is located between the impeller and the sliding bearing assembly;

the mechanical seal comprises a movable ring and a stationary ring, an annular groove is formed in the periphery of the stationary ring, an O-shaped ring is arranged in the groove, a gland is connected to the outer side of the stationary ring, the O-shaped ring is arranged between the stationary ring and the gland, and the gland is fixedly connected with the pump body through a first bolt;

the sliding bearing assembly comprises a thrust disc, a thrust ring, a sliding bearing, a bearing gland and a thrust bearing; the outer side of the sliding bearing assembly is connected with a bearing seat, the front end of the bearing seat extends to form a protruding part, and the protruding part is fixedly connected with the pump body;

a cavity is formed between the pump body, the mechanical seal, the protrusion, and the plain bearing assembly; the pump body is provided with a through hole which is communicated with the cavity, and lubricating liquid is introduced into the cavity;

the pump body is provided with a first channel, the protruding part is provided with a first corner, and the first channel is matched with the first corner; and a second channel is formed in one side, close to the pump shaft, of the pump body, and the gland is arranged in the second channel.

Further, the first channel and the first corner both adopt right angles.

Furthermore, the magnetic driver comprises an inner magnetic rotor, an outer magnetic rotor and an isolation sleeve, wherein the isolation sleeve is arranged between the inner magnetic rotor and the outer magnetic rotor; the inner magnetic rotor is fixedly connected with the pump shaft.

Furthermore, a bracket is arranged on the outer side of the magnetic driver and fixedly connected with the bearing seat; the rear end fixedly connected with bearing part of support, be equipped with the stabilizer blade on the bearing part.

To sum up, the utility model discloses following technological effect has been gained:

the utility model discloses increase one mechanical seal between medium and sliding bearing assembly, mechanical seal keeps apart medium and sliding bearing assembly, makes the not direct contact sliding bearing assembly of medium, avoids sliding bearing to meet low temperature and becomes fragile, prevents that sliding bearing is cracked. The utility model discloses set up the cavity between mechanical seal and sliding bearing subassembly, input lubricated liquid in the cavity, avoid slide bearing dry grinding, extension slide bearing's life, the utility model discloses simple structure has improved conveying efficiency.

Drawings

FIG. 1 is a schematic view of a prior art magnetic pump;

fig. 2 is a schematic view of a magnetic pump according to an embodiment of the present invention;

fig. 3 is a schematic view of a mechanical seal provided by an embodiment of the present invention;

FIG. 4 is a schematic view of portion A of FIG. 2;

in the figure, 1, a pump body, 101, a first channel, 102, a second channel, 2, a pump shaft, 3, a mechanical seal, 301, a movable ring, 302, a stationary ring, 303, an O-ring, 304, a gland, 305, a groove, 4, a bearing seat, 401, a protrusion, 402, a first corner, 5, a sliding bearing assembly, 501, a thrust disc, 502, a thrust ring, 503, a sliding bearing, 504, a bearing gland, 505, a thrust bearing, 6, a magnetic driver, 601, an internal magnetic rotor, 602, a spacer sleeve, 603, an external magnetic rotor, 7, a bracket, 8, a bearing component, 9, a support leg, 10, a cavity, 11, a through hole, 12, a first bolt, 13, and a second bolt.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Example (b):

as shown in fig. 1, which is a schematic view of a magnetic pump in the prior art, a sliding bearing is in direct contact with a low-temperature medium, which easily causes the sliding bearing to break, and the medium is used as a lubricating fluid to lubricate the sliding bearing, which has low lubricating performance and easily causes the sliding bearing to wear.

As shown in fig. 2 to 4, a cold insulation magnetic pump includes a pump body 1, a pump shaft 2 is installed on the pump body 1, an impeller is installed at the front end of the pump shaft 2, a magnetic driver 6 is installed at the rear end of the pump shaft 2, a mechanical seal 3 and a sliding bearing assembly 5 are installed on the pump shaft 2, the mechanical seal 3 is located between the impeller and the sliding bearing assembly 5, the mechanical seal 3 separates a conveying medium from the sliding bearing assembly 5, so that the sliding bearing assembly 5 is not in direct contact with the conveying medium, and low-temperature cracking of the sliding bearing assembly 5 is avoided.

As shown in fig. 3 and 4, the mechanical seal 3 includes a moving ring 301 and a stationary ring 302, an annular groove 305 is formed in the outer periphery of the stationary ring 302, an O-ring 303 is disposed in the groove 305, a gland 304 is connected to the outer side of the stationary ring 302, the O-ring 303 is disposed between the stationary ring 302 and the gland 304, and the gland 304 is fixedly connected to the pump body 1 by a first bolt 12.

As shown in fig. 4, the plain bearing assembly 5 includes a thrust disc 501, a thrust ring 502, a plain bearing 503, a bearing gland 504, a thrust bearing 505; the outer side of the sliding bearing assembly 5 is connected with a bearing seat 4, the front end of the bearing seat 4 extends to form a protruding part 401, and the protruding part 401 is fixedly connected with the pump body 1. Specifically, the protruding portion 401 is fixedly connected to the pump body 1 by the second bolt 13. A shaft sleeve is also arranged between the sliding bearing 503 and the pump shaft 2.

The pump body 1, the mechanical seal 3, the protrusion 401, and the sliding bearing assembly 5 form a cavity 10 therebetween, and the cavity 10 surrounds the pump shaft 2. The side of the pump body 1 is provided with an inwards concave curved surface, the volume of the cavity 10 is increased by the curved surface, more lubricating liquid can be contained, and the lubricating effect is better.

The pump body 1 is provided with a through hole 11 (shown in figure 2), the through hole 11 is communicated with a cavity 10, and lubricating liquid is introduced into the cavity 10. The lubricating liquid can lubricate the sliding bearing component 5, so that the sliding bearing component 5 is prevented from being dry-ground, and the service life of the sliding bearing component 5 is prolonged.

As shown in fig. 4, the pump body 1 is provided with a first groove 101, the protrusion 401 is provided with a first corner 402, and the first groove 101 is matched with the first corner 402. The first channel 101 and the first corner 402 are both at right angles. The pump body 1 is provided with a second channel 102 at one side close to the pump shaft 2, and the gland 304 is arranged in the second channel 102. The first channel 101 and the first corner 402 are matched, the gland 304 and the second channel 102 are matched, and the joints are provided with sealing rings, so that the firm connection and the sealing performance between the pump body 1 and the bearing seat 4 and between the pump body 1 and the mechanical seal 3 are improved, and the lubricating liquid is prevented from leaking.

As shown in fig. 2, the magnetic driver 6 includes an inner magnetic rotor 601, an outer magnetic rotor 603, and a spacer 602, where the spacer 602 is disposed between the inner magnetic rotor 601 and the outer magnetic rotor 603; the inner magnet rotor 601 is fixedly connected with the pump shaft 2. A bracket 7 is arranged on the outer side of the magnetic driver 6, and the bracket 7 is fixedly connected with the bearing block 4; the rear end of the bracket 7 is fixedly connected with a bearing part 8, and a supporting leg 9 is arranged on the bearing part 8.

Compared with the prior art, the utility model discloses increase one mechanical seal 3 between medium and slide bearing subassembly 5, mechanical seal 3 keeps apart medium and slide bearing subassembly 5, makes medium not direct contact slide bearing subassembly 5, avoids slide bearing to meet low temperature embrittlement, prevents that slide bearing is cracked. The utility model discloses set up cavity 10 between mechanical seal 3 and slide bearing subassembly 5, input lubricated liquid in the cavity 10, avoid slide bearing dry grinding, prolong slide bearing's life, the utility model discloses simple structure has improved conveying efficiency.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims (4)

1. The utility model provides a cold insulation magnetic drive pump, includes the pump body (1), install pump shaft (2) on the pump body (1), the impeller is installed to the preceding tip of pump shaft (2), magnetic drive ware (6), its characterized in that are installed to the back tip of pump shaft (2): a mechanical seal (3) and a sliding bearing assembly (5) are arranged on the pump shaft (2), and the mechanical seal (3) is positioned between the impeller and the sliding bearing assembly (5);

the mechanical seal (3) comprises a movable ring (301) and a static ring (302), an annular groove (305) is formed in the periphery of the static ring (302), an O-shaped ring (303) is arranged in the groove (305), a gland (304) is connected to the outer side of the static ring (302), the O-shaped ring (303) is arranged between the static ring (302) and the gland (304), and the gland (304) is fixedly connected with the pump body (1) through a first bolt (12);

the sliding bearing assembly (5) comprises a thrust disc (501), a thrust ring (502), a sliding bearing (503), a bearing gland (504) and a thrust bearing (505); a bearing seat (4) is connected to the outer side of the sliding bearing assembly (5), a protruding portion (401) extends from the front end of the bearing seat (4), and the protruding portion (401) is fixedly connected with the pump body (1);

a cavity (10) is formed among the pump body (1), the mechanical seal (3), the protrusion (401) and the sliding bearing assembly (5); a through hole (11) is formed in the pump body (1), the through hole (11) is communicated with the cavity (10), and lubricating liquid is introduced into the cavity (10);

a first channel (101) is formed in the pump body (1), a first corner (402) is arranged on the protruding portion (401), and the first channel (101) is matched with the first corner (402); the pump body (1) is provided with a second channel (102) at one side close to the pump shaft (2), and the gland (304) is arranged in the second channel (102).

2. A cold-keeping magnetic pump according to claim 1, wherein: the first channel (101) and the first corner (402) are both at right angles.

3. A cold-keeping magnetic pump according to claim 1, wherein: the magnetic driver (6) comprises an inner magnetic rotor (601), an outer magnetic rotor (603) and an isolation sleeve (602), wherein the isolation sleeve (602) is arranged between the inner magnetic rotor (601) and the outer magnetic rotor (603); the inner magnetic rotor (601) is fixedly connected with the pump shaft (2).

4. A cold-keeping magnetic pump according to claim 1, wherein: a bracket (7) is arranged on the outer side of the magnetic driver (6), and the bracket (7) is fixedly connected with the bearing seat (4); the rear end fixedly connected with bearing part (8) of support (7), be equipped with stabilizer blade (9) on bearing part (8).

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