CN220600064U - Mechanical sealing structure for vertical pipeline pump - Google Patents

Abstract

The utility model belongs to the technical field of fluid machinery, in particular to a mechanical sealing structure for a vertical pipeline pump, which comprises the following components: the device comprises a shaft sleeve, a movable ring, a stationary ring, a sealing ring, a flange, screws, an O-shaped ring, an impeller nut, an impeller, a pump shaft, a pump cover, bolts and a pump body; the shaft sleeve is connected with the movable ring, the flange is connected with the stationary ring, the shaft sleeve is fixed on the pump shaft through the bolts, the flange is fixed on the pump cover through the bolts, the shaft sleeve is sleeved on the pump shaft, the shaft penetrates through the pump cover, the impeller is mounted on the shaft, the impeller nut is used for fastening the impeller, the impeller hub is sleeved with the O-shaped ring, the shaft sleeve is fixed on the pump shaft through the bolts, the flange is fixed on the pump cover through the bolts, and the pump shaft, the mechanical seal whole, the pump cover, the impeller and the impeller screw are integrally mounted on the pump body. The mechanical seal structure for the vertical pipeline pump has the advantages of high installation precision, difficult locking, long service life of the mechanical seal, good seal and suitability for conveying high-temperature, high-pressure, corrosion and other liquids.

Description

Mechanical sealing structure for vertical pipeline pump

Technical Field

The utility model belongs to the technical field of fluid machinery, relates to a vertical pipeline pump sealing technology, and in particular relates to a mechanical sealing structure for a vertical pipeline pump.

Background

Tubing pumps are very important delivery tools in fluid delivery processes.

The pipeline pump, also called booster pump, is a kind of single-suction single-stage or multi-stage centrifugal pump, and is a vertical structure, and because its inlet and outlet are on the same straight line, and their inlet and outlet calibers are identical, it is similar to a section of pipeline, and can be mounted in any position of pipeline, so that it is called pipeline pump. The pipeline pump is used for conveying liquid with extremely low solid content, is widely applied to stations such as process water treatment, equipment cooling and the like in the industries such as power generation, chemical industry, mine metallurgy and the like, and is also applied to stations such as urban water supply and drainage, boiler water supply, fire water, high-rise building pipeline pressurization and the like. The mechanical sealing structure of the pipeline pump is a key part of the pump shaft sealing of the whole pump, and once the sealing fails, the pump can leak and cannot work normally. The mechanical seal consists of a base body, a friction pair, a sealing ring and a spring, wherein the base body refers to support components such as a flange, a shaft sleeve and the like, the friction pair refers to a ring and a static ring, the sealing ring is an elastic sealing element such as an O-shaped ring or a rubber gasket, and the spring is used for adjusting the pressure and the sealing gap of a rotary friction surface between the ring and the static ring; the static seal and the rotary friction surface seal formed by the seal rings form a complete mechanical seal closed loop, so that all paths possibly causing leakage are blocked, and liquid is prevented from leaking from the pump end to the atmosphere end.

In the prior art, the mechanical sealing structure of the vertical pipeline pump is bulk and consists of an end cover, a spring, a movable ring, a static ring, a sealing ring, an impeller nut, an impeller, a pump shaft, a pump cover and a pump body. The sealing ring is matched with the pump cover to form static seal, the static ring and the moving ring form a rotary sealing surface, one end of the spring is connected with the moving ring, the other end of the spring is connected with the end cover, and the other end of the end cover props against the tail end of the impeller hub. The bulk mechanical seal structure requires the seal elements to be mounted and dismounted one by one during mounting and dismounting. The technology is mature, but has the advantages of poor installation precision, easy locking, short mechanical sealing service life, easy leakage, inadaptability to high temperature and high pressure and inadequacy to corrosion.

Disclosure of Invention

It can be seen that in the prior art, the pipeline pump adopts a bulk mechanical seal structure, has the defects of poor installation precision, easy locking, short service life of mechanical seal, easy leakage and incapability of adapting to special working conditions such as high temperature, high pressure, corrosion and the like. The utility model provides the following technical scheme for solving the technical problems.

A mechanical seal structure for a vertical tube pump, comprising: the vertical pipeline pump mainly comprises a shaft sleeve 1, a movable ring 2, a stationary ring 3, a sealing ring 4, a flange 5, a screw 6, an O-shaped ring 7, an impeller nut 8, an impeller 9, a pump shaft 10, a pump cover 11, a bolt 12 and a pump body 13, and is mainly divided into a mechanical seal whole and a pump body, wherein the mechanical seal whole is formed by combining the shaft sleeve (1), the movable ring (2), the stationary ring (3), the sealing ring (4), the flange (5), the screw (6) and the O-shaped ring (7), and the whole vertical pipeline pump is connected in a mechanical seal structure as follows: the shaft sleeve 1 is sleeved on the pump shaft 10, the pump shaft 10 passes through the pump cover 11, the impeller 9 is mounted on the pump shaft 10 and is fastened by the impeller nut 8, the front end O-shaped ring 7 is sleeved on the impeller 9 hub through the shaft sleeve 1, the shaft sleeve 1 is fixed on the pump shaft 10 by the screw 6, the flange 5 is fixed on the pump cover 11 by the bolt 12, and the pump shaft 10, the mechanical seal whole, the pump cover 11, the impeller 9 and the impeller nut 8 are integrally mounted on the pump body 13.

Preferably, the O-shaped ring (7) is made of fluororubber, and the fluororubber has the characteristics of high temperature resistance, oil resistance and chemical corrosion resistance, so that the service life of the whole mechanical seal can be effectively prolonged.

Preferably, the pump body (13) is made of stainless steel for delivering non-corrosive or weakly corrosive liquids.

Preferably, the pump body (13) is made of fluorine engineering plastics for delivering highly corrosive liquids and does not burn to withstand high temperatures.

The utility model relates to a mechanical sealing structure for a vertical pipeline pump, which is assembled and disassembled in the following way: the mechanical seal structure is used for assembling as a whole, then the shaft sleeve 1 is sleeved on the pump shaft 10, the pump shaft 10 passes through the pump cover 11, then the impeller 9 is installed, the impeller 9 is fastened through the impeller nut 8, the position of the shaft sleeve 1 is adjusted, the front end O-shaped ring 7 of the shaft sleeve 1 is sleeved on the hub matching surface of the impeller 9, the shaft sleeve 1 is fixed on the pump shaft 10 by screwing the screw 6, the flange 5 is fixed on the pump cover 11 by screwing the screw 12, and finally the pump shaft 10, the mechanical seal whole, the pump cover 11, the impeller 9 and the impeller nut 8 are integrally installed on the pump body 13 to complete the assembly.

The disassembly sequence is approximately opposite to the assembly sequence, the pump shaft 10, the mechanical seal whole, the pump cover 11, the impeller 9 and the impeller nut 8 are disassembled from the pump body 13 as a whole, the impeller nut 8 is loosened, the impeller 9 is removed, the connecting bolts 12 between the flange 5 and the pump cover 11 are loosened, the pump cover 11 is removed, the bolts 6 are loosened, and the mechanical seal whole is separated from the shaft 10, so that the disassembly is completed.

Advantageous effects

The utility model has the outstanding improvement characteristics: 1) The mechanical seal structure is of a container type, and can be integrally installed and detached, so that the installation precision of the internal structure of the mechanical seal can be ensured, and the installation difficulty and the influence of uncontrollable installation factors on the long-term stable operation of the mechanical seal are reduced; 2) The mechanical seal structure is axially adjustable, the front end of the shaft sleeve is sleeved on the matching surface of the impeller hub, and the matching surface of the impeller hub is longer, so that a larger axial adjustment space is provided, after the axial position of the shaft sleeve is adjusted, the shaft sleeve is fixed by fastening a screw, the mechanical seal position is locked, the problem that the mechanical seal is difficult to install in place and is leaked or locked due to the deviation of installation size can be prevented, and the adaptability of the mechanical seal is enhanced; 3) The mechanical seal is externally-installed and can be washed, most of the structures are positioned at the atmosphere end and are not contacted with liquid, and for corrosive liquid working conditions, the mechanical seal has better corrosion resistance and longer service life. The flange is provided with a flushing water interface, so that different flushing schemes can be adopted according to the requirements of conveying liquids with different properties, the sealing reliability is ensured, and the service life of the mechanical seal is prolonged.

Drawings

FIG. 1 is a schematic view of a mechanical seal structure for a vertical tube pump according to the present utility model;

the device comprises a 1-shaft sleeve, a 2-movable ring, a 3-stationary ring, a 4-sealing ring, a 5-flange, 6-screws, a 7-O-shaped ring, an 8-impeller nut, a 9-impeller, a 10-shaft, an 11-pump cover, a 12-bolt and a 13-pump body.

Detailed Description

In order that the objects and advantages of the utility model will become more apparent, a further description of the utility model will be given below in connection with the embodiments; it should be noted that the specific embodiments described herein are for illustrative purposes only and are not limiting.

Referring to the drawings, the specific embodiments of the utility model are as follows:

a mechanical seal structure for a vertical pipeline pump comprises a shaft sleeve 1, a movable ring 2, a stationary ring 3, a sealing ring 4, a flange 5, a screw 6, an O-shaped ring 7, an impeller nut 8, an impeller 9, a pump shaft 10, a pump cover 11, a bolt 12 and a pump body 13, wherein the mechanical seal structure mainly comprises a mechanical seal whole and the pump body, and the mechanical seal whole is formed by combining the shaft sleeve 1, the movable ring 2, the stationary ring 3, the sealing ring 4, the flange 5 and the screw 6) and the O-shaped ring 7. Firstly, combining the whole mechanical seal, sleeving a shaft sleeve 1 on a pump shaft 10, enabling the pump shaft 10 to pass through a pump cover 11, then installing an impeller 9, fastening the impeller 9 by using an impeller nut 8, adjusting the position of the shaft sleeve 1, enabling an O-shaped ring 7 at the front end of the shaft sleeve to sleeve the hub of the impeller 9, fastening a screw 6 to fix the shaft sleeve 1 on the pump shaft 10, fastening a bolt 12 to fix a flange 5 on the pump cover 11, and finally, integrally installing the pump shaft 10, the whole mechanical seal, the pump cover 11, the impeller 9 and the impeller nut 8 on a pump body 13 to finish the installation; when the mechanical seal is detached, the shaft 10, the mechanical seal whole, the pump cover 11, the impeller 9 and the impeller nut 8 are detached as a whole from the pump body 13, the impeller nut 8 is loosened, the impeller 9 is detached, the connecting bolt 12 between the flange 5 and the pump cover 11 is loosened, the pump cover 11 is detached, the screw 6 is loosened again, and the mechanical seal whole is separated from the shaft 10, so that the detachment is completed.

So far, the technical solution of the present utility model has been described in detail with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present utility model is not limited to this specific embodiment. Equivalent modifications and substitutions of related technical features, such as different impellers for different liquids, etc., can be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims (3)

1. The utility model provides a mechanical seal structure for vertical pipeline pump, by axle sleeve (1), rotating ring (2), quiet ring (3), sealing washer (4), flange (5), screw (6), O shape circle (7), impeller nut (8), impeller (9), pump shaft (10), pump cover (11), bolt (12) and pump body (13) combination form, divide into mechanical seal whole and pump body two big parts, mechanical seal whole by axle sleeve (1), rotating ring (2), quiet ring (3), sealing washer (4), flange (5), screw (6), O shape circle (7) combination form its characterized in that: the novel pump is characterized in that the shaft sleeve (1) is connected with the movable ring (2), the flange (5) is connected with the static ring (3), the screw (6) is used for fixing the shaft sleeve (1) on the pump shaft (10), the shaft sleeve (1) is sleeved on the pump shaft (10), the pump shaft (10) penetrates through the pump cover (11), the impeller (9) is installed on the pump shaft (10), the impeller nut (8) is used for fastening the impeller (9), the O-shaped ring (7) is sleeved on the hub of the impeller (9), the flange (5) is fixed on the pump cover (11) through the bolt (12), and the pump shaft (10), the mechanical seal whole, the pump cover (11), the impeller (9) and the impeller nut (8) are integrally installed on the pump body (13).

2. The mechanical seal structure for a vertical tube pump according to claim 1, wherein: the position of the shaft sleeve (1) can be adjusted.

3. The mechanical seal structure for a vertical tube pump according to claim 1, wherein: the O-ring (7) is made of fluororubber.