CN219062049U

CN219062049U - Axial-flow pump slide bearing seal structure

Info

Publication number: CN219062049U
Application number: CN202223472349.4U
Authority: CN
Inventors: 赵德; 徐金华; 代洪洋; 杨孟; 怡洋; 巩标; 黄汉林; 赵红香; 王彦龙; 胡杰
Original assignee: Hefei Huasheng Pumps & Valves Co ltd
Current assignee: Hefei Huasheng Pumps & Valves Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-05-23
Anticipated expiration: 2032-12-26

Abstract

The utility model provides a sliding bearing sealing structure of an axial flow pump. The axial-flow pump sliding bearing sealing structure comprises a pump body, a lip type sealing element and a guide vane, wherein a shaft sleeve is sleeved on a rotating shaft in the pump body, a sliding bearing is fixedly installed on the shaft sleeve, the lip type sealing element is sleeved on the shaft sleeve, the lip type sealing element is installed on the front side of the sliding bearing, and the guide vane is installed on the sliding bearing through a sliding bearing seat. According to the axial flow pump sliding bearing sealing structure, the lip-type sealing piece of the lip-type sealing structure is designed in front of the sliding bearing, so that in the flushing process, as the sealing performance is good, the pressure holding effect is achieved, the internal and external pressure difference is increased, the flushing pressure is higher, the flushing is more effective, and meanwhile, under the condition of pressure loss, namely no pressure source or no flushing, the structure is designed, so that working media, particularly solid particles, can be effectively prevented from entering the sliding bearing, the shaft sleeve and the shaft to enable the sliding bearing, the shaft sleeve and the shaft to be worn and zero, and the effects of preventing part wear and improving the flushing efficiency are achieved.

Description

Axial-flow pump slide bearing seal structure

Technical Field

The utility model relates to the technical field of axial flow pumps, in particular to a sliding bearing sealing structure of an axial flow pump.

Background

The pump is controlled by a prime mover (motor), and is an energy device for converting energy output from the prime mover into medium pressure energy. The pump is mainly used for conveying liquid including water, oil, acid-alkali liquor, emulsion, liquid metal and the like, and can also be used for conveying liquid, gas mixture and liquid containing suspended solids. The pump may be used in agriculture, in chemical, in petroleum production, in mining and metallurgical industries, in electric power, etc.

The annular pipe axial flow pump is core equipment of devices such as polypropylene and polyethylene, provides circulating power for the whole reaction device, and the equipment needs long-term stable operation and provides precondition and guarantee for the stable operation of the whole device, so that an auxiliary flushing system and an anti-abrasion device are necessary, and the annular pipe axial flow pump has complicated structure, is inconvenient to assemble and disassemble and has an unobvious effect when adopting other structures.

Accordingly, there is a need to provide an axial flow pump sliding bearing seal arrangement that addresses the above-identified issues.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model provides a sliding bearing sealing structure of an axial flow pump.

The utility model adopts the following technical scheme:

an axial flow pump sliding bearing seal structure comprising: the pump body, lip type sealing member and stator, the pivot in the pump body is gone up the cover and is equipped with the axle sleeve, and fixed mounting has slide bearing on the axle sleeve, lip type sealing member cover is established on the axle sleeve, and the front side at slide bearing is installed to lip type sealing member, the stator passes through the slide bearing seat and installs on slide bearing.

Preferably, the lip type sealing member comprises a rubber sleeve, a funnel ring, an annular rubber tube, an air duct, a pressing air tube, a spring and a gasket, wherein the funnel ring is fixedly arranged at the top of the rubber sleeve, the annular rubber tube is fixedly embedded at the top of the funnel ring, an annular groove is formed in the inner wall of the rubber sleeve, which is close to the funnel ring, the pressing air tube is fixedly arranged in the annular groove, the rubber sleeve is mutually communicated with the pressing air tube through a plurality of air ducts, a spring is fixedly arranged in a mounting cavity formed in the inner bottom wall of the rubber sleeve, the spring extends out of the mounting cavity and is fixedly provided with the gasket, and the rubber sleeve is sleeved on the shaft sleeve.

Preferably, a gasket in the lip seal abuts against the front side wall of the sliding bearing, and an annular rubber tube in the lip seal abuts against the bearing snap ring.

Preferably, an impeller is mounted on a rotating shaft in the pump body, and the impeller is fixedly mounted on the rotating shaft through an impeller nut.

Preferably, a flushing interface is fixedly arranged on the side wall of the pump body, and the flushing interface is communicated with the sliding bearing and the liquid flowing holes formed in the guide vanes.

Preferably, two groups of symmetrically distributed flushing interfaces are arranged on the pump body.

Preferably, a bearing snap ring for clamping the sliding bearing seat is fixedly arranged on the shaft sleeve.

The utility model has the advantages that:

1. according to the utility model, the lip type sealing element with the lip type sealing structure is designed in front of the sliding bearing, so that in the flushing process, as the sealing performance is good, the pressure holding effect is achieved, the internal and external pressure difference is increased, the flushing pressure is higher, and the flushing is more effective;

2. the utility model can effectively prevent working medium, especially solid particles, from entering the sliding bearing, the shaft sleeve and the shaft to lead the abrasion to be zero under the condition of no pressure, namely no pressure source or no flushing, thereby achieving the effects of preventing the abrasion of parts and improving the flushing efficiency;

3. when the rotating shaft in the pump body 1 vibrates, the gasket can compress the spring, so that the amplitude between the rubber sleeve and the shaft sleeve is reduced, the sealing failure of the rubber sleeve on the rotating shaft is avoided, when the rotating shaft in the pump body deflects left and right, the annular rubber tube is compressed, gas in the annular rubber tube enters the pressing air tube through the air guide tube, the expanded pressing air tube is pressed on the shaft sleeve, and the installation stability of the rubber sleeve on the shaft sleeve is further improved.

Drawings

FIG. 1 is a schematic view of a seal structure of an axial flow pump sliding bearing according to a preferred embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of the structure shown at A in FIG. 1;

FIG. 3 is an enlarged schematic view of the structure shown at B in FIG. 2;

FIG. 4 is one of the structural schematic illustrations of the lip seal shown in FIG. 3;

FIG. 5 is a second schematic illustration of the lip seal of FIG. 3;

fig. 6 is a schematic illustration of a partial cross-section of the lip seal of fig. 4.

Reference numerals in the drawings: 1. pump body, 2, impeller nut, 3, impeller, 4, sliding bearing seat, 5, flushing interface, 6, bearing snap ring, 7, lip seal, 71, rubber sleeve, 72, funnel ring, 73, annular rubber tube, 74, air duct, 75, pressfitting air duct, 76, spring, 77, packing ring, 8, sliding bearing, 9, guide vane, 10, axle sleeve.

Detailed Description

The utility model will be further described with reference to the drawings and embodiments.

Referring to fig. 1 to 3 in combination, fig. 1 is a schematic structural diagram of a preferred embodiment of a sliding bearing seal structure of an axial flow pump according to the present utility model; FIG. 2 is an enlarged schematic view of the structure shown at A in FIG. 1; fig. 3 is an enlarged schematic view of the structure at B shown in fig. 2. Comprising the following steps: pump body 1, lip seal 7 and guide vane 9.

In the specific implementation process, as shown in fig. 1, 2 and 3, an impeller 3 is mounted on a rotating shaft in the pump body 1, the impeller 3 is fixedly mounted on the rotating shaft through an impeller nut 2, a shaft sleeve 10 is sleeved on the rotating shaft in the pump body 1, a sliding bearing 8 is fixedly mounted on the shaft sleeve 10, a bearing clamping ring 6 for clamping the sliding bearing seat 4 is mounted on the shaft sleeve 10, and the guide vane 9 is mounted on the sliding bearing 8 through the sliding bearing seat 4.

It should be noted that: the direction indicated by the arrow in the figure is the flowing direction of the working medium (possibly containing solid particles) at the position, after working medium entering from the inlet flange in the annular tube axial flow pump works through the impeller 3, the working medium flows to the outlet through the guide vane 9, finally the working medium is discharged through the outlet flange, and meanwhile flushing fluid is introduced into the flushing interface 5 to dissipate heat and cool.

Referring to fig. 2, the lip seal 7 is sleeved on the shaft sleeve 10, the lip seal 7 is mounted on the front side of the sliding bearing 8, the lip seal 7 comprises a rubber sleeve 71, a funnel ring 72, an annular rubber tube 73, an air duct 74, a pressing air tube 75, a spring 76 and a gasket 77, the funnel ring 72 is fixedly mounted on the top of the rubber sleeve 71, the annular rubber tube 73 is fixedly embedded on the top of the funnel ring 72, an annular groove is formed in the inner wall of the rubber sleeve 71, which is close to the funnel ring 72, an air duct 75 is fixedly mounted in the annular groove, the rubber sleeve 71 is mutually communicated with the pressing air tube 75 through a plurality of air ducts 74, a spring 76 is fixedly mounted in a mounting cavity formed in the inner bottom wall of the rubber sleeve 71, the spring 76 extends out of the mounting cavity and is fixedly provided with the gasket 77, the rubber sleeve 71 is sleeved on the shaft sleeve 10, the gasket 77 in the lip seal 7 abuts against the front side wall of the sliding bearing 8, the annular rubber tube 73 in the lip seal 7 abuts against the bearing snap ring 6, a flushing interface 5 is fixedly mounted on the side wall 1, the flushing interface 5 abuts against the guide vane 8 and the two pump body interfaces 1 are symmetrically distributed on the pump body 1, and the two pump body interfaces are mutually communicated with the pump body interfaces 5 are symmetrically distributed.

It should be noted that: when vibration occurs to a rotating shaft in the pump body 1, the gasket 77 can compress the spring 76, so that the amplitude between the rubber sleeve 71 and the shaft sleeve 10 is reduced, the sealing failure of the rubber sleeve 71 on the rotating shaft is avoided, when the rotating shaft in the pump body 1 deflects left and right, the annular rubber tube 73 is compressed, gas in the annular rubber tube 73 enters the pressing air tube 75 through the air tube 74, the expanded pressing air tube 75 is pressed on the shaft sleeve 10, the stability of the rubber sleeve 71 on the shaft sleeve 10 is further improved, and the lip-type sealing piece 7 of a lip-type sealing structure is designed in front of the sliding bearing 8, so that in the flushing process, the pressure difference between the inside and the outside is increased due to the good sealing performance, the flushing pressure is higher and the flushing is more effective; meanwhile, under the condition of pressure loss, namely no pressure source or no flushing, the structure is designed to effectively prevent working media, especially solid particles, from entering the sliding bearing 8, the shaft sleeve 10 and the shaft to enable the sliding bearing to be worn and zero, so that the effects of preventing parts from being worn and improving flushing efficiency are achieved.

The working principle of the sliding bearing sealing structure of the axial flow pump provided by the utility model is as follows:

working medium (possibly containing solid particles) flows to the impeller 3, working medium entering from an inlet flange in the annular tube axial flow pump flows to an outlet through a guide vane 9 after working is performed by the impeller 3, and finally is discharged through an outlet flange, flushing fluid is simultaneously introduced into a flushing interface 5 to dissipate heat and cool, and a lip seal 7 of a lip seal structure is designed in front of a sliding bearing 8, so that in the flushing process, pressure holding effect is achieved due to good sealing performance, internal and external pressure difference is increased, flushing pressure is higher, and flushing is more effective; meanwhile, under the condition of pressure loss, namely no pressure source or no flushing, the structure is designed to effectively prevent working medium, especially solid particles, from entering the sliding bearing 8, the shaft sleeve 10 and the shaft to enable the working medium to be worn and zero, the effects of preventing part wear and improving flushing efficiency are achieved, when the rotating shaft in the pump body 1 vibrates, the gasket 77 can compress the spring 76, so that the amplitude between the rubber sleeve 71 and the shaft sleeve 10 is reduced, the rubber sleeve 71 is prevented from sealing failure in the rotating shaft, when the rotating shaft in the pump body 1 deflects left and right, the annular rubber tube 73 is compressed, gas in the annular rubber tube 73 enters the pressing air tube 75 through the air duct 74, and the pressed air tube 75 after expansion is pressed on the shaft sleeve 10, so that the stability of installation of the rubber sleeve 71 on the shaft sleeve 10 is further improved.

The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the present utility model, and any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.

Claims

1. An axial flow pump slide bearing seal structure, characterized by comprising:

the device comprises a pump body (1), wherein a shaft sleeve (10) is sleeved on a rotating shaft in the pump body (1), and a sliding bearing (8) is fixedly arranged on the shaft sleeve (10);

the lip type sealing piece (7) is sleeved on the shaft sleeve (10), and the lip type sealing piece (7) is arranged on the front side of the sliding bearing (8);

the guide vane (9), the guide vane (9) is installed on the sliding bearing (8) through the sliding bearing seat (4).

2. The axial flow pump sliding bearing sealing structure according to claim 1, wherein the lip type sealing member (7) comprises a rubber sleeve (71), a funnel ring (72), an annular rubber tube (73), an air duct (74), a pressing air duct (75), a spring (76) and a gasket (77), the funnel ring (72) is fixedly arranged at the top of the rubber sleeve (71), the annular rubber tube (73) is fixedly embedded at the top of the funnel ring (72), an annular groove is formed in the inner wall, close to the funnel ring (72), of the rubber sleeve (71), the pressing air duct (75) is fixedly arranged in the annular groove, the rubber sleeve (71) is mutually communicated with the pressing air duct (75) through a plurality of air ducts (74), the spring (76) is fixedly arranged in a mounting cavity formed in the inner bottom wall of the rubber sleeve (71), the spring (76) extends out of the mounting cavity and is fixedly provided with the gasket (77), and the rubber sleeve (71) is sleeved on the shaft sleeve (10).

3. The axial flow pump slide bearing seal structure according to claim 2, characterized in that a gasket (77) in the lip seal (7) abuts against a front side wall of the slide bearing (8), and an annular rubber tube (73) in the lip seal (7) abuts against the bearing retainer ring (6).

4. The sliding bearing sealing structure of the axial flow pump according to claim 1, characterized in that an impeller (3) is mounted on a rotating shaft in the pump body (1), and the impeller (3) is fixedly mounted on the rotating shaft through an impeller nut (2).

5. The axial flow pump sliding bearing sealing structure according to claim 1, wherein a flushing interface (5) is fixedly arranged on the side wall of the pump body (1), and the flushing interface (5) is communicated with the sliding bearing (8) and the fluid holes formed in the guide vanes (9).

6. The axial flow pump sliding bearing sealing structure according to claim 5, characterized in that two groups of symmetrically distributed flushing interfaces (5) are arranged on the pump body (1).

7. The axial flow pump sliding bearing sealing structure according to claim 1, characterized in that a bearing snap ring (6) for clamping the sliding bearing seat (4) is fixedly arranged on the shaft sleeve (10).