CN108547791A - A kind of self cooling sealing assembly of centrifugation shurry pump - Google Patents

Abstract

A self-cooling shaft seal assembly for a centrifugal slurry pump. The self-cooling shaft seal assembly includes a seal box connected to the pump casing and a shaft seal installed on the pump main shaft. The shaft seal is composed of two front and rear seals arranged at intervals. The gap between the front seal and the rear seal is surrounded by the seal box and the shaft sleeve to form a liquid storage chamber, which is filled with liquid, and a heat dissipation part is arranged on the main shaft or the moving ring at the rear side of the rear seal. The shaft seal of the centrifugal slurry pump can be equipped with a self-cooling system, which can run safely without cooling with cooling water, save a lot of water resources, and clean the working environment of the pump, while reducing the pollution of the cooling water water treatment costs.

Description

Self-cooling shaft seal assembly for centrifugal slurry pump

technical field

The invention relates to the field of centrifugal slurry pumps, in particular to a shaft seal for centrifugal slurry pumps.

Background technique

Chinese Patent Publication No. CN 206159103 U discloses a side suction anti-friction centrifugal pump, which includes a pump body, an outlet on the side wall of the pump body, a suction tee located at the rear side of the pump body, a main shaft and a shaft seal structure, the shaft The sealing structure is installed on the main shaft in the pump body, and is located at the side suction port of the suction tee. The shaft sealing structure includes a dynamic seal for sealing slurry, a mechanical seal for sealing cooling water and a mechanical seal for sealing the cooling water. The dynamic seal and the mechanical seal are connected to form a sealing assembly of a cooling water storage chamber. The dynamic seal is located at the side suction inlet, and the mechanical seal is located at the rear side of the dynamic seal. The cooling water inlet and cooling water outlet are arranged on the sealing assembly. The seal is composed of a lip-shaped rubber dynamic seal and an external mechanical seal, which solves the problem of cooling water leakage in the centrifugal pump. However, the pump shaft seal of this structure still needs to be filled with external cooling water. It still needs to consume water resources for cooling the pump shaft seal, and causes secondary pollution of cooling water, thereby increasing the cost of purification and treatment of polluted water. Calculated by one pump, about 60kg of cooling water needs to be consumed or discharged per hour, and about 1.2 tons of cooling waste water is generated every day. Calculated at 40 yuan per ton of sewage treatment fee, the cooling water sewage treatment fee generated by one pump is 15,000 yuan /year or so.

At present, the centrifugal slurry pump still needs to use cooling water for continuous flushing and cooling, and it does not meet the requirements of the national environmental protection policy. Therefore, the centrifugal pump still has room for improvement.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a self-cooling shaft seal assembly for a centrifugal slurry pump that does not need external cooling water for continuous flushing and cooling, and can transport corrosive slurry.

In order to achieve the purpose of the present invention, the following technical solutions are provided: a self-cooling shaft seal assembly for a centrifugal slurry pump, the self-cooling shaft seal assembly includes a seal box connected to the pump casing, a shaft seal installed on the pump main shaft, It is characterized in that the shaft seal is composed of two front and rear seals arranged at intervals, the gap between the front seal and the rear seal, the seal box and the shaft sleeve are enclosed to form a liquid storage chamber, the liquid storage chamber is filled with liquid, and the rear seal is Drive and static ring mechanical seals, heat dissipation parts are arranged on the main shaft and or on the moving ring on the rear side of the rear seal.

Preferably, the liquid is oil or water. The main functions are three functions of lubrication, heat conduction and pressure balance.

More preferably, graphite powder is filled in the grease. The grease can be common engine oil, gear oil, glycerin and other greases. The graphite powder is a fine powder of more than 300 mesh.

The proportioning of the graphite powder and the grease is between 20-40% by weight.

Preferably, the front seal is a lip rubber ring.

Preferably, there is at least one lip-shaped rubber sealing ring. More preferably, there are two lip-shaped rubber sealing rings, and the lips are installed facing away from each other. Most preferably, micropores and filter bodies are provided on the lip-shaped rubber sealing ring.

Preferably, the subsequent seal is a mechanical seal that drives a static ring.

Preferably, cooling fins or concavo-convex parts are provided on the outer side of the moving ring.

Preferably, the material of the moving ring is a material with high thermal conductivity. Such as graphite, copper, etc.

Most preferably, the end face material of the friction pair of the moving ring is a material with high wear resistance and low coefficient of friction.

Preferably, a liquid storage sensor is provided in the liquid storage cavity, and the liquid storage sensor is connected to an alarm circuit.

Preferably, a liquid injection hole is opened at the position of the sealed box facing the liquid storage chamber.

Preferably, the sealed box is composed of a box body, a sealing ring sleeve with a liquid injection hole and a sealing cover or a sealing ring sleeve with a liquid injection hole and a sealing cover or a box body and a sealing cover.

Preferably, a liquid injection joint and a bulkhead nut are arranged on the liquid injection hole. In order to achieve the purpose of the present invention, an application of a self-cooling shaft seal assembly for centrifugal slurry pumps is provided, which is characterized in that the self-cooling shaft seal assembly is applied to front-suction centrifugal pumps, side-suction centrifugal pumps, plastic-lined centrifugal pumps, etc. Type centrifugal pump, all-plastic centrifugal pump.

When the centrifugal slurry pump of the present invention is a side suction centrifugal pump, when the fluid is conveyed at high pressure or low pressure, the pressure of the fluid in the sealing part is unbalanced, and generally increases with the increase of the conveying pressure, so that the front Sealed lip rubber seals are instantly pressure-resistant and damage the lip of the rubber ring. In the present invention, the filling liquid in the liquid storage chamber will not leak due to the sealing of the rear mechanical seal, and the pressure of the filling liquid will increase with the pump pressure under the effect of creep deformation of the lip-shaped rubber sealing ring At the same time, it rises, so that both sides of the dynamic seal maintain equal pressure, so this provides conditions for the safe operation of the lip seal. The existence of the lip-shaped seal ring blocks the conveying slurry in the pump body, so that the mechanical seal of the subsequent seal cannot touch the particles, so the existence of the lip-shaped seal creates conditions for the safe operation of the mechanical seal. The filling liquid sealed in the liquid storage chamber not only produces the effect of equalizing the pressure of the fluid on both sides of the sealing ring, but also lubricates the mechanical seal, transfers heat energy, and cools the shaft seal. Then use the heat dissipation part to dissipate heat, combine the single functions of each unit component scientifically, and then derive a self-cooling function of heat dissipation, no need to wash with cooling water, self-lubricating function, capable of transporting slurry, and sealed for use. The long-life side suction centrifugal slurry pump subverts the long-standing practice in the industry that the shaft seal of the centrifugal slurry pump must be cooled with cooling water.

Beneficial effects of the present invention: the benefit of the present invention is that the shaft seal of the centrifugal slurry pump can be equipped with a self-cooling system, which can run safely without cooling with cooling water, save a lot of water resources, and clean the pump Use the working environment while reducing the cost of water treatment after the cooling water is polluted. It is convenient for users to install and operate, and there is no need to set up cooling water inlet and outlet pipelines and sewage collection systems, saving installation costs.

Description of drawings

Fig. 1 is a schematic structural diagram of a pump according to Embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of the sealing part in FIG. 1 .

Fig. 3 is a schematic diagram of the sealing structure of the outer periphery of the moving ring with a cooling part.

Fig. 4 is a schematic structural diagram of a pump according to Embodiment 2 of the present invention.

FIG. 5 is a schematic structural diagram of the sealing portion in FIG. 4 .

Fig. 6 is a schematic diagram of the sealing structure of Embodiment 3 of the present invention.

Fig. 7 is another form of sealing structure of Fig. 6 .

Fig. 8 is yet another form of sealing structure of Fig. 6 .

Fig. 9 is a schematic diagram of a sealing structure of a lip-shaped rubber sealing ring with a filtering function.

Fig. 10 is a schematic diagram of the lip-shaped rubber sealing ring in Fig. 9 .

Fig. 11 is a schematic structural diagram of the pump in embodiment 4 of the present invention shown in Fig. 1 .

FIG. 12 is a partially enlarged view of part A in FIG. 11 .

Fig. 13 is a schematic structural diagram of a pump according to Embodiment 5 of the present invention.

Fig. 14 is a schematic diagram of the sealing structure of Embodiment 6 of the present invention.

Detailed ways

Embodiment 1: As shown in Figures 1 and 2: a side suction centrifugal slurry pump, including a pump body 1, an outlet 1.1 arranged on the side wall of the pump body 1, and a suction port 3 located on the rear side of the pump body 1 Tong 2, main shaft 3, shaft sleeve 4.3.1 on main shaft 3, and self-cooling shaft seal assembly. The seal box 4.4 connected to the pump casing 1, the shaft seal installed on the pump main shaft 3, the shaft seal is composed of two front and rear seals set at intervals, the gap between the front seal and the rear seal is the same as the seal box 4.4, and the shaft sleeve 4.3 .1 Enclosed to form a liquid storage chamber 5, the sealing box 4.4 is sealed and connected with the suction port tee 2, the liquid storage chamber 5 is filled with liquid, and the front seal is set between the main shaft sleeve 4.3.1 and the sealing box 4.4 The lip-shaped rubber sealing ring 4.1.1, and the rear seal is an external mechanical seal 4.2 with a moving ring 4.2.1 and a static ring 4.2.2. The lip-shaped rubber sealing ring 4.1.1 is installed in the sealing box 4.4, the lip of the lip-shaped rubber sealing ring 4.1.1 is installed backwards, the moving ring 4.2.1 is set outside the static ring 4.2.2, and the static ring 4.2.2 and the lip An O-shaped rubber ring 4.6 is arranged between the lip-shaped rubber sealing ring 4.1.1, and the sealing cover 4.4.2 presses the static ring 4.2.2, and is fixed with the suction port tee 2, and the front side of the lip-shaped rubber sealing ring 4.1 is set There is a decompression plate 7. A wind wheel 6 is arranged on the main shaft 3 at the rear side of the rear seal.

As shown in Figure 3: as the second form of embodiment 1, the outer periphery of the moving ring 4.2.1 is provided with a heat dissipation part 4.2.3, and the heat dissipation part is provided with one or a combination of fins, holes and grooves capable of generating wind and dissipating heat.

In order to improve the temperature resistance and wear resistance of the side suction pump, an effective method is to use ceramics as the inner lining of the pump.

The ceramics are alumina, silicon carbide and other ceramics.

The pump casing 1, the pump cover 1.2, and the suction port tee 2 are lined with ceramics, which can be inlaid, poured, or bushed.

In order to improve the high wear resistance of the side suction pump and be able to adapt to the transportation of materials with high abrasive requirements such as lime slag and quartz sand, an effective method is to line the pump body 1 with a silicon carbide lining.

In order to facilitate the production of side suction pumps with silicon carbide linings, a good method is to mix resin and silicon carbide particles and pour them directly into the metal shell of the pump body 1, pump cover 1.2, and suction port tee 2.

Embodiment 2: As shown in Figures 4 and 5, a side-suction centrifugal slurry pump has a secondary structure. The sealing box 4.4 includes a box body 4.4.1 and a sealing cover 4.4.2, and the sealing cover 4.4.2 It is fixedly connected with the suction port tee 2, the front seal is set in the box body 4.4.1, the rear seal is set in the sealing cover 4.4.2, the rear seal is the built-in mechanical seal 4.2, and the moving ring 4.2.1 is set On the inner side of the static ring 4.2.2, the outermost static ring 4.2.2 is in sealing connection with the contact surface of the sealing cover 4.4.2. A wind wheel 6 is arranged on the main shaft at the rear side of the rear seal.

Embodiment 3: As shown in Figures 6, 7, and 8, referring to the side suction centrifugal slurry pump described in Embodiment 1, a rear seal for sealing and spacing is provided between the rear seal and the rear seal. For the ring sleeve 4.7 that seals the outer peripheral surface of the rear channel, a liquid injection hole 4.7.1 is opened on the ring sleeve 4.7, and a liquid injection joint 4.8 and a bulkhead nut 4.8.1 are arranged on the liquid injection hole 4.7.1, and a liquid injection hole is set. The purpose is to facilitate regular injection of grease into the liquid storage chamber 5. The purpose of setting the bulkhead nut 4.8.1 is to close the liquid injection hole 7.7.1 when the pump is working, so that the liquid storage chamber 5 is in a closed state, so that there is The hydraulic pressure that is beneficial to the liquid storage in the liquid storage chamber 5 changes with the hydraulic lift of the suction tee 2, and is in a state of equal pressure with the fluid pressure in the suction tee 2, which is conducive to extending the lip-shaped rubber sealing ring 4.1.1. service life. The reason is: the fluid pressure in the suction tee 2 is affected by the fluid level at the pump inlet. If the liquid level is high, the fluid pressure in the suction tee 2 is also high, and the fluid pressure in the suction tee 2 is also affected by the pumped liquid. The influence of oral fluid pressure will increase or decrease synchronously. Therefore, the liquid injection hole of the liquid storage chamber 5 is closed, so that the pressure of the fluid in the liquid storage chamber and the fluid pressure in the suction port tee 2 can rise and fall synchronously, so that the lip of the lip rubber sealing ring 4.1 is not under pressure, and then Extends the life of lip seals.

In this embodiment, in order to ensure that the fluid in the liquid storage chamber does not leak into the pump chamber, the lip of the sealing ring near the machine cover of the two lip-shaped rubber seal rings 4.1 of the power seal can be installed toward the machine seal. (Figure 6).

The ring sleeve 4.7 between the front seal and the rear seal described in this embodiment can be made separately (as shown in Figure 6), and can also be made integrally with the seal box 4.4 (that is, a liquid injection hole is opened in the seal box, and the liquid injection The hole is facing the liquid chamber) (as shown in Figure 7).

As shown in Fig. 7, another implementation method in this embodiment: the above-mentioned side suction centrifugal pump, connect tap water on the liquid injection hole 7.7.1, and put the two lip-shaped rubber seal rings in the front seal All the lips of the pump are installed towards the pump cavity, so that after the tap water valve is opened, the tap water enters the liquid storage chamber 5, on the one hand, it lubricates and cools the moving ring 4.2.1 and the static ring 4.2.2 of the mechanical seal, and on the other hand, the tap water flows The gap between the lip of the rubber sealing ring 4.1 and the shaft sleeve 4.3.1 is flushed into the pump chamber to flush the sealing part. The centrifugal pump of this embodiment can be used to transport high-concentration slurry, for example, when transporting solid-liquid When the ratio is about 50% thick slurry, the shaft seal is also very safe.

In this embodiment, in order to save water, the hole diameter of the liquid injection hole 7.7.1 can be set between 1~2mm, and the water consumption can be controlled between 10~15L/h, which is better than that of the original technology with cooling water The shaft seal of the inlet and outlet should save about 80% of water.

As shown in Figure 8, the third implementation form of embodiment 3 does not provide a separate sealing box, the sealing box is made integrally with the suction port tee 2, and the suction port tee 2 is directly fixed with the sealing ring sleeve 4.7 and the sealing cover 4.4.2 The lip-shaped rubber sealing ring 4.1.1 of the front seal is installed in the liquid storage chamber 2.2 integrated with the tee, the mechanical seal 4.2 of the rear seal is located on the rear side, and the sealing ring sleeve 4.7 is located between the front seal and the rear Between the road seals, there is a liquid injection hole 4.7.1 on the ring sleeve.

The components of the sealing box 4.4 formed by the different combinations of the above-mentioned box body 4.4.1, sealing ring sleeve 4.7, and sealing cover 4.4.2 can actually be called the same technical feature, and its function is to make the front seal, the rear seal and their components The equivalent replacement of any technical features with similar functions is within the protection scope of the present application.

Embodiment 4: A front-suction centrifugal slurry pump as shown in Figure 11, which includes a pump casing 1 with a liquid outlet 1.1 around the pump casing, a pump cover 1.2 connected and fixed to the pump casing, and an inlet on the pump cover 1.2.1, the pump cover 1.2 is fixedly connected with the pump casing 1 to form a pump chamber, the main shaft 3 extends into the pump chamber through the middle hole of the pump casing, the pump chamber is provided with an impeller 7, and the impeller 7 is provided with a back blade 7.1, The impeller 7 is sleeved and fixed on the main shaft 3, and the main shaft 3 is provided with a self-cooling shaft seal assembly, which includes a seal box 5.2 connected to the pump casing, a shaft seal installed on the pump main shaft 3, and a shaft seal assembly. The seal is composed of two front and rear seals arranged at intervals. The gap between the front seal and the rear seal is surrounded by the seal box 5.2 and the shaft sleeve 3 to form a liquid storage chamber 5.7. The liquid storage chamber 5.7 is filled with liquid. After the rear seal A wind wheel 6 is arranged on the main shaft on the side. The front seal is a lip-shaped rubber seal ring 5.3, the rear seal is an external mechanical seal with a moving ring 5.5 and a static ring 5.4, a bearing 9 is provided between the main shaft 3 and the shaft seat 8, and the other end of the main shaft 3 is provided with a Coupling 10 for motor coupling.

The sealing box 5.2 is fixed on the pump casing 1 .

The lip-shaped rubber sealing ring 5.3 and the static ring 5.4 are arranged between the sealing box 5.2 and the shaft sleeve 5.1.2, and are pressed and fixed by the sealing gland 5.6.

The moving ring 5.5, the wind wheel 6 and the cap 7 are arranged on one side of the static ring 5.4 successively, and the moving ring 5.5 is tightly bonded with the static ring 5.4.

The wind wheel 6 can be an annular wind wheel, or a wind-generating component composed of blades.

The outer periphery of the moving ring is provided with wings 5.5.1, the main function of which is to dissipate heat.

The outer periphery of the moving ring is provided with wings 5.5.1, which can be threads, concave and convex strips, holes, grooves and the like.

The lip-shaped rubber sealing ring 5.3 is installed in combination of two. The material is acid-resistant and oil-resistant. Fluororubber is selected for acid resistance, and neoprene is selected for oil resistance. On the side near the stationary ring, the lips of the two sealing rings are installed facing away from each other.

The bushing 5.1.1 is made of silicon carbide or alumina ceramics, which is not limited.

The liquid storage chamber 5.7 between the lip-shaped rubber sealing ring 5.3 and the stationary ring 5.4 and the moving ring 5.5 is filled with high-temperature lubricating oil, and the lubricating oil can be selected from fats or oils, or a mixture of the two.

The static ring 5.4 is a kind of ceramic.

The moving ring 5.5 is made of graphite, the purpose of which is to improve the heat dissipation performance of the moving ring due to the good thermal conductivity of graphite.

As shown in Figure 12: In order to improve the service life of the moving ring, the sealing surface of the moving ring based on graphite is inlaid with a wear-resistant friction pair layer 5.5.2. The friction pair layer is made of modified tetrafluoroethylene, modified polyphenylene, or Other metals or non-metallic materials with good wear resistance and low heat generation can be used, and this is not limited.

After the above-mentioned pump casing 1, impeller 7, pump cover 1.2, main shaft 3, bearing seat 8, shaft seal and motor are combined and installed together, and grease is filled in the liquid storage chamber 5.7, a kind of cooling water that does not need external cooling water is obtained. , Centrifugal pump with self-cooling shaft seal and capable of transporting slurry.

Example 5: (See Figure 13)

Referring to the front-suction centrifugal slurry pump described in Example 4, an additional impeller 11 is provided between the impeller 7 and the lip rubber seal ring 5.3, the purpose of which is to further decompress the fluid in the sealing part, so that the pump shaft seal is in the It works under normal pressure, which can make the service life of the shaft seal longer.

Example 6: (See Figure 14)

With reference to the front-suction centrifugal slurry pump described in embodiment 4, an oil injection hole 5.8 is opened on the sealing box 5.2, and the oil injection hole 5.8 is sealed after injecting grease, and graphite fine powder is added in the injected grease, the purpose is to increase the oil content of the grease. Thermal conductivity, so that the accumulated temperature of the sealing part can be dissipated quickly through the heat dissipation part on the moving ring.

In order to ensure that the pressure of the filling fluid in the sealing part is relatively equal to the fluid pressure in the pump cavity, an effective method is to close the injection hole when the pump is working, so as to isolate the filling fluid from the outside world.

In this embodiment, the grease can be common machine oil, gear oil, glycerin and other greases.

The graphite powder is a fine powder of more than 300 mesh.

The proportioning of the graphite powder and the grease is between 20-40% by weight.

In the scheme of the above embodiment, the heat dissipation performance of the sealing part can be greatly improved, and the range of material selection between the moving ring and the static ring can be expanded. The moving ring of the mechanical seal can be made of silicon carbide or hard alloy, which can improve the service life of the seal. and scope of application.

The purpose of opening the oil filling hole 5.8 in the above embodiment is to facilitate the maintenance operation.

In the above-mentioned embodiment, the mechanical seal includes a moving ring, a static ring, and a spring. The material of the moving and static ring can be preferably a material with good wear resistance and a small coefficient of friction, such as silicon carbide, silicon nitride, cemented carbide, composite ceramics, polytetrafluoroethylene, etc. Vinyl fluoride, graphite, composite plastics. It is configured according to the requirements of conventional mechanical seal friction pairs, and is not limited in the present invention.

In the above embodiment, as shown in Figure 10, in order to balance the internal and external pressure of the lip seal 4.1.1, it is suitable for transporting dilute slurry with less solid content, which is convenient for operation. 4.1.1 is provided with a filter body 4.1.2 and micropores 4.1.3 through which the fluid passes, allowing the fluid in the pump chamber to pass through the filtered clear liquid and flow into the liquid storage chamber 5, which plays the role of heat conduction and lubrication, so that the mechanical seal The dynamic and static rings are only in contact with the clear liquid, not the slurry, so the life of the mechanical seal will be longer, and the liquid storage chamber can be automatically replenished.

The material of the flow-passing part of the centrifugal pump in the present invention can be plastic, ceramics, metal, etc., which is not limited here and does not affect the essence of the present invention. No matter what kind of side-suction centrifugal pump with flowing material, as long as it is equipped with the sealing structure of the present invention, it is within the scope of protection covered by the present invention.

The technology of the invention can be applied to the seal of a single-stage side-suction centrifugal slurry pump, and is also suitable for the shaft seal of a double-stage side-suction centrifugal slurry pump. The two-stage side-suction centrifugal slurry pump installed by the technology of the present invention is also within the scope of protection of this patent.

Compared with the similar side suction slurry pump of the prior art, this kind of centrifugal pump can extend the service life of the seal from 2 to 4 months to 8 to 10 months, more than double the service life of the seal, and does not need cooling water and consumes Water resources, but also can make the environment of the pump machine clean.

The shaft seal of the side suction centrifugal pump in the present invention combines a simple dynamic seal and a mechanical seal with a heat dissipation part, and a closed cavity is formed between the two, and grease or water is injected into the cavity , to form a side suction centrifugal pump with self-lubricating function, self-cooling function, no need to add cooling water, capable of sealing and conveying slurry, and prolonging service life.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included within the protection scope of the present invention .

Claims (16)

1. a kind of self cooling sealing assembly of centrifugation shurry pump, self cooling sealing assembly includes the seal box being connect with pump case, peace Loaded on the sealing on pump main shaft, it is characterised in that sealing is made of spaced front and back two seals, the sealing of preceding road, after Gap and seal box, axle sleeve between road sealing are encircled into liquid storage chamber, and liquid storage intracavitary is filled with liquid, rear road be sealed into drive, The mechanical seal of stationary ring, rear road seal on the main shaft of rear side and/or are provided with radiating part on rotating ring.

2. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 1, it is characterised in that liquid is grease Or water.

3. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 2, it is characterised in that filled in grease There is powdered graphite.

4. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 1, it is characterised in that preceding road is sealed into Rubber lip circle.

5. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 1, it is characterised in that rear road is sealed into Mechanical seal with dynamic and static ring.

6. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 1, it is characterised in that radiating part is scattered Hot wing or with jog or and wind wheel.

7. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 6, it is characterised in that rotating ring material is The high material of thermal coefficient.

8. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 4, it is characterised in that rubber lip is close Seal is at least one.

9. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 4, it is characterised in that rubber lip is close Seal is two, and lip is backwards to installation.

10. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 4, it is characterised in that rubber lip is close Seal is equipped with micropore and filtering body.

11. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 7, it is characterised in that rotating ring friction is secondary Face material be high abrasion, low-friction coefficient material.

12. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 1, it is characterised in that liquid storage intracavitary is set It is equipped with liquid storage inductor, liquid storage inductor connects alarm circuit.

13. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 1, it is characterised in that seal box face The position of liquid storage chamber offers liquid injection hole.

14. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 13, it is characterised in that seal box is By box body, offer liquid injection hole seal ring set and sealing capping form or by offer liquid injection hole seal ring set, sealing Capping composition is made of box body, sealing capping.

15. a kind of self cooling sealing assembly of centrifugation shurry pump according to claim 1, it is characterised in that set on liquid injection hole Fluid injection connector and silently nut.

16. a kind of application of centrifugation self cooling sealing assembly of shurry pump as described in one of claim 1 ~ 15, feature exist It is applied to preceding suction centrifugal pump, side suction type centrifugal pump, lining plastic type centrifugal pump, full-plastic centrifugal pump in its self cooling sealing assembly.