CN2783005Y - Mechanical seal part for coal slurry pump - Google Patents

Abstract

The utility model discloses a mechanical seal part for a coal slurry pump, comprising a primary mechanical seal, a secondary mechanical seal, a shaft sleeve assembly, a main flange and a secondary flange assembly, the primary mechanical seal includes a dynamic ring, a static ring, The spring seat, the spring, and the shaft sleeve are arranged adjacent to the main flange. The shaft sleeve is embedded with a moving ring, and the main flange is embedded with a static ring, spring seat, and spring. One end of the static ring is offset against the moving ring, and the other end is The springs are opposed, and the springs are placed in the spring seat; the secondary mechanical seal is set behind the primary mechanical seal, including the spring seat, spring, moving ring, and static ring, and the spring seat, spring, moving ring, and static ring are all embedded in the second method. Inside, one end of the static ring is against the moving ring, and the other end is against the spring. The mechanical seal part can effectively prevent coal powder and other solid impurities from entering the mechanical seal part of the pump and cause leakage, so that the coal slurry pump can adapt to various harsh environments and prolong its life.

Description

A mechanical seal component for a coal slurry pump

technical field

The utility model relates to a pump suitable for the fields of petrochemical and environmental protection, more specifically a mechanical sealing part for a coal slurry pump.

Background technique

With the rapid development of "coal-to-oil" in the world, my country took the lead in building the "coal-to-oil" direct liquefaction industrialization device. Among them, the coal slurry pump is one of the key equipment. The traditional slurry pump is suitable for conveying solid mixtures with strong abrasiveness and solid solid particles, such as ore slurry, ash, cement slurry, mortar, gravel, etc., the above-mentioned The content of impurities is usually between 3-5%. In the desulfurization process of power plants, the content of carbon slag can reach 30%. However, the operating environment of coal slurry pumps is very harsh, and the solid content of pulverized coal is as high as 48.3%. Therefore, in order to adapt to such For use in harsh environments, a new type of coal slurry pump must be developed, and the design of the new type of coal slurry pump must solve the wear problems of impellers and pump casings and other flow-passing parts, the problem of solid deposition and blockage in a certain area, and the reliability of the seal. Problems, it is possible to work normally, for this, we have designed a new coal slurry pump, the coal slurry pump is applying for a Chinese patent, the sealing part as an important part also needs to be redesigned to adapt to the new The tightness requirements of the designed coal slurry pump.

Contents of the invention

The purpose of this utility model is to provide a mechanical seal part for a coal slurry pump, which can effectively prevent leakage caused by coal powder and other solids entering the mechanical seal part of the pump.

In order to achieve the above object, the utility model adopts the following technical solutions:

The mechanical seal components for coal slurry pump include primary mechanical seal, secondary mechanical seal, shaft sleeve assembly, main flange and secondary flange assembly,

in,

The first-stage mechanical seal further includes a moving ring, a static ring, a spring seat, and a spring. The shaft sleeve is arranged adjacent to the main flange. 1. Spring, one end of the static ring is against the moving ring, the other end is against the spring, and the spring is placed in the spring seat;

The secondary mechanical seal is arranged after the primary mechanical seal, and it further includes a spring seat, a spring, a moving ring, and a static ring, and the spring seat, spring, moving ring, and static ring are all embedded in the secondary flange, and the static ring One end is against the moving ring, and the other end is against the spring.

"O" type sealing rings are arranged between the moving ring and the shaft sleeve of the first-stage mechanical seal, and between the static ring and the main flange.

The moving ring of the secondary mechanical seal is provided with an "O" sealing ring, and an "O" sealing ring is provided between the static ring and the secondary flange.

In the above technical solution of the present utility model, the mechanical seal component includes a primary mechanical seal, a secondary mechanical seal, a shaft sleeve assembly, a main flange and a secondary flange assembly, wherein the primary mechanical seal further includes a moving ring, Static ring, spring seat, spring, shaft sleeve are arranged adjacent to the main flange, a moving ring is embedded in the shaft sleeve, a static ring, spring seat, and spring are embedded in the main flange, and one end of the static ring is offset against the moving ring. The other end is against the spring, and the spring is placed in the spring seat; the secondary mechanical seal is set behind the primary mechanical seal, which further includes the spring seat, spring, moving ring, and static ring. The spring seat, spring, moving ring, and static ring are all Embedded in the secondary flange, one end of the static ring is against the moving ring, and the other end is against the spring. Therefore, the shaft sealing part of the utility model can effectively prevent coal powder and other solid debris from entering the mechanical seal part of the pump and cause leakage, so that the coal slurry pump can be adapted to various harsh environments, and at the same time solves the problem of the coal slurry pump. Wear, deposition problems, improve its life.

Description of drawings

Fig. 1 is a schematic structural view of a coal slurry pump using the mechanical seal component of the present invention.

Fig. 2 is a structural schematic diagram of the mechanical seal component of the present invention.

Fig. 3 is a schematic diagram of the principle of the system supporting the operation of the mechanical seal component of the present invention.

Detailed ways

In order to further illustrate the above-mentioned purpose, technical solutions and effects of the present utility model, the following description will be made through the accompanying drawings and examples.

In order to have a comprehensive understanding of the mechanical seal component of the present utility model, please first describe the structure of the coal slurry pump that uses the shaft seal component of the present utility model in combination with Figure 1:

The mechanical seal part 10 of the present utility model is arranged on the transmission shaft 21 of the coal slurry pump 20, and it is located between the pump body part 22 and the bearing part 23 of the coal slurry pump 20. The function of the mechanical seal part 10 can effectively prevent the Solid sundries such as pulverized coal entering the feed port 24 of the slurry pump 20 pass through the impeller 25 and the buffer zone 26 and then enter the mechanical seal 10, thereby causing leakage.

Please continue to refer to Figure 2,

The mechanical seal component 10 of the present utility model includes a primary mechanical seal 100, a secondary mechanical seal 200, a shaft sleeve assembly 300, a main flange 400 and a secondary flange assembly 500,

in,

The first-stage mechanical seal 100 further includes a moving ring 101, a static ring 102, a spring seat 103, and a spring 104. The shaft sleeve 300 is arranged adjacent to the main flange 400, and the shaft sleeve 300 is embedded with a moving ring 101. The main method A static ring 102, a spring seat 103, and a spring 104 are embedded in the blue 400. One end of the static ring 102 is offset against the moving ring 101, and the other end is offset against the spring 104, and the spring 104 is placed in the spring seat 103.

The secondary mechanical seal 200 is located behind the primary mechanical seal 100, it is closer to the bearing part of the coal slurry pump, and it further includes a spring seat 201, a spring 202, a moving ring 203, a static ring 204, a spring seat 201, a spring 202 , the moving ring 203 and the static ring 204 are all embedded in the secondary flange 500 , one end of the static ring 204 is against the moving ring 203 , and the other end is against the spring 202 .

An “O”-shaped sealing ring 105 is provided between the moving ring 101 and the shaft sleeve 300 and between the stationary ring 102 and the main flange 400 of the primary mechanical seal 100 .

The moving ring 203 of the secondary mechanical seal 200 is provided with an “O”-shaped sealing ring 205 , and an “O”-shaped sealing ring 205 is also provided between the stationary ring 204 and the spring seat 201 .

In addition, in FIG. 2 , 401 is a clean oil injection hole, 402 is an inlet of sealing liquid, and 501 is an outlet of sealing liquid.

Due to the harsh medium conditions, in order to prevent leakage and deposition of coal and other sundries, for coal slurry pumps, we have used the centrifugal force of the double-backed blades of the impeller to throw out a large amount of solids radially, avoiding the pump and the shaft seal. There is a large amount of silt between the impellers and three clean liquid buffers before the mechanical seal components, so that the impurity content gradually decreases here; the floating ring seal device is also designed to use the clean pressure liquid leaked from the mechanical seal. The narrow gap between the floating ring and the shaft produces a large hydraulic resistance, thereby preventing the pulverized coal from escaping into the mechanical seal; and continuously filling the sealing liquid at room temperature into the mechanical seal part of the utility model, which not only plays a role in lubrication , cooling, etc., and the sealing liquid pressure in the sealing chamber is controlled by the system to be higher than the buffer pressure. The pressure difference ensures that a small amount of cleaning liquid continues to leak into the pump, keeping the upstream area clean, and playing the role of sealing. The circulation, pressure stabilization, cooling, and liquid replenishment of the cleaning liquid operate in accordance with API682Plan 53. The support system 30 serves as a mechanical seal, and has functions such as pressure control, liquid replenishment, cooling, circulation, etc., and is set according to API682 Plan 53 "American Petroleum Institute Standard - Centrifugal Pump and Rotary Pump Shaft Sealing System". As shown in FIG. 3 , the system 30 mainly includes a measuring component 31 , a thermosiphon tank 32 , a liquid level switch 33 , and a manual pump 34 . There is a cooling coil in the thermosiphon tank 32, which can be used for liquid storage and cooling, and is pressurized with N2; the measuring component 31 is a visual monitor for operating temperature and working pressure.

After the assembly of the mechanical seal assembly 10 and the coal slurry pump is completed, the buffer zone 26 ( FIG. 1 ) of the coal slurry pump is filled with clean oil in advance. When the coal slurry pump is in normal operation, 1 liter of clean oil is injected into the buffer zone 26 every day to ensure the cleanliness of the buffer zone 26. At this time, the oil is injected under pressure. Its pressure is controlled so that its pressure is higher than the pressure in the pump, so that less than 10mL per hour can leak into the pump, so that the buffer zone 26 can be kept clean, effectively avoiding the deposition and blocking of pulverized coal, and ensuring the normal operation of the pump.

Of course, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the utility model, rather than as a limitation to the utility model, as long as within the spirit of the utility model, the above The changes and modifications of the embodiments will all fall within the scope of the claims of the present utility model.

Claims (3)

1. A mechanical seal component for a coal slurry pump comprises a primary mechanical seal, a secondary mechanical seal, a shaft sleeve assembly, a main flange and a secondary flange assembly,

the method is characterized in that:

the primary mechanical seal further comprises a movable ring, a static ring, a spring seat and a spring, the shaft sleeve is arranged adjacent to the main flange, the movable ring is embedded in the shaft sleeve, the static ring, the spring seat and the spring are embedded in the main flange, one end of the static ring is abutted against the movable ring, the other end of the static ring is abutted against the spring, and the spring is arranged in the spring seat;

after the second-stage mechanical seal is arranged on the first-stage mechanical seal, the second-stage mechanical seal further comprises a spring seat, a spring, a movable ring and a static ring, wherein the spring seat, the spring, the movable ring and the static ring are all embedded in the secondary flange, one end of the static ring is abutted against the movable ring, and the other end of the static ring is abutted against the spring.

2. The mechanical seal component for a slurry pump as recited in claim 1,

the method is characterized in that:

o-shaped sealing rings are arranged between the movable ring and the shaft sleeve and between the static ring and the main flange of the primary mechanical seal.

3. The mechanical seal component for a slurry pump as recited in claim 1,

the method is characterized in that:

an O-shaped sealing ring is sleeved in the movable ring of the secondary mechanical seal, and the O-shaped sealing ring is arranged between the static ring and the secondary flange.

Images