CN204403375U - A kind of novel shaft seal - Google Patents

Abstract

The utility model relates to a new type of shaft seal. The shaft seal includes a shaft seal body, an oil cup, a gland, and packing. The shaft seal body is arranged between a stirring shaft and a stuffing box, and the gland is arranged on the filler Above, the gland is fixed on the stuffing box by bolts and nuts, the oil cup is set in the middle of the stuffing, and a water jacket and a cooling water outlet are set on one side of the shaft seal. The advantages of this technology are as follows: 1) The overall structure of the utility model is ingeniously designed, compact and practical; 2) The technical solution has a good sealing effect and greatly improves the assembly accuracy of the product; 3) On the gland of the stuffing box The installation of the bushing can greatly improve the assembly accuracy, so that the shaft has good centering, and when the packing is pressed, the force is more uniform, ensuring that the packing seal works under good conditions; 4) The cost of this technical solution is low, and it is convenient Large-scale promotion and application.

Description

A new type of shaft seal

technical field

The utility model relates to a shaft seal, in particular to a novel shaft seal, which belongs to the technical field of structural components of stirring reaction equipment.

Background technique

A shaft seal is a friction seal or stuffing box used to prevent fluid leakage between the shaft and bearings of a compressor or other fluid handling equipment. The shaft seal is a sealing device set up to prevent leakage between the pump shaft and the casing. The commonly used types of shaft seals include packing seals, mechanical seals and dynamic seals. The shaft seals of reciprocating pumps are usually packing seals. Diaphragm reciprocating pumps can be used; the shaft seals of rotary pumps mainly include packing seals, mechanical seals and dynamic seals. At present, there are many shaft seals on the market, but the following problems generally exist: 1) The structure is relatively complicated, the cost is high, and disassembly and maintenance are troublesome; 2) The sealing effect is poor, which reduces the assembly accuracy of the entire equipment; 3) The replacement frequency is fast, The use time is short, therefore, a new technical solution is urgently needed to solve the above technical problems.

Utility model content

The utility model just aims at the technical problems existing in the prior art, and provides a new type of shaft seal, which has ingenious design, compact structure, low cost, good sealing effect, long service life and cost saving .

In order to achieve the above object, the technical solution of the utility model is as follows: a new shaft seal, the shaft seal includes a shaft seal body, an oil cup, a gland, and a filler, and the shaft seal body is arranged between the stirring shaft and the stuffing box, The gland is arranged above the packing, and the gland is fixed on the stuffing box by bolts and nuts, the oil cup is arranged in the middle of the packing, and a water jacket and a cooling water outlet are arranged on one side of the shaft seal. The entire technical solution is ingeniously designed, compact in structure, and has good sealing effect, which greatly improves the assembly accuracy of the product.

As an improvement of the utility model, the shaft seal further includes a sealing ring, and the sealing ring is arranged outside the packing to further enhance its sealing effect.

As an improvement of the utility model, the shaft seal further includes a bush, and the bush is arranged on the gland. Setting the bushing on the gland of the stuffing box can greatly improve the assembly accuracy, make the shaft have good centering, and when the packing is pressed, the force is more uniform, ensuring that the packing seal works under good conditions.

As an improvement of the utility model, the packing is arranged as an annular packing. Since it is difficult to ensure the size of packing of other shapes during transfer, after the packing is compacted, it cannot be completely guaranteed that each circle is in good contact with the shaft, and the stress state is not good, resulting in the failure of the packing seal and leakage. The effect is greatly improved.

Compared with the existing technology, the advantages of this technology are as follows: 1) The overall structure of the utility model is ingeniously designed, compact and practical; 2) The technical solution has a good sealing effect and greatly improves the assembly accuracy of the product; 3) In the packing The bushing is set on the gland of the box, which can greatly improve the assembly accuracy, make the shaft have good centering, and when the packing is pressed, the force is more uniform, ensuring that the packing seal works under good conditions; 4) This technology The solution cost is low, and it is convenient for large-scale popularization and application.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the utility model;

In the figure: 1. Stuffing box, 2. Cooling water outlet, 3. Water jacket, 4. Oil cup, 5. Packing gland, 6. Nut, 7. Bolt, 8. Seal ring, 9. Cooling water inlet, 10, packing, 11, bushing, 12, stirring shaft.

Detailed ways

In order to deepen the understanding and recognition of the utility model, the utility model will be further described and introduced below in conjunction with the accompanying drawings and specific embodiments.

Embodiment 1 : Referring to Fig. 1, a new type of shaft seal, the shaft seal includes a shaft seal body, an oil cup 4, a gland 5, and a filler 10, and the shaft seal body is arranged between the stirring shaft 12 and the stuffing box 1 Between, the gland 5 is arranged above the packing 10, the gland 5 is fixed on the stuffing box 1 by the bolt 7 and the nut 6, the oil cup 4 is arranged in the middle of the packing, and one side of the shaft seal is provided with Water jacket 3 and cooling water outlet 2. The entire technical solution is ingeniously designed, compact in structure, and has good sealing effect, which greatly improves the assembly accuracy of the product.

Embodiment 2 : Referring to Fig. 1, as an improvement of the present utility model, the shaft seal further includes a sealing ring 8, and the sealing ring 8 is arranged outside the packing to further enhance its sealing effect. The rest of the structures and advantages are exactly the same as in Embodiment 1.

Embodiment 3 : Referring to FIG. 1 , as an improvement of the present utility model, the shaft seal further includes a bushing 11 , and the bushing 11 is arranged on the gland 5 . The bushing 11 is arranged on the gland of the stuffing box, which can greatly improve the assembly accuracy, make the shaft have good centering, and when the packing is pressed, the force is more uniform, ensuring that the packing seal works under good conditions. The rest of the structures and advantages are exactly the same as in Embodiment 1.

Embodiment 4 : Referring to Fig. 1, as an improvement of the utility model, the packing is arranged as a ring packing. Since it is difficult to ensure the size of packing of other shapes during transfer, after the packing is compacted, it cannot be completely guaranteed that each circle is in good contact with the shaft, and the stress state is not good, resulting in the failure of the packing seal and leakage. The effect is greatly improved. The rest of the structures and advantages are exactly the same as in Embodiment 1.

The utility model can also combine at least one of the technical features described in embodiments 2, 3, and 4 with embodiment 1 to form a new embodiment.

It should be noted that the above-mentioned embodiments are not used to limit the protection scope of the present utility model, and equivalent transformations or substitutions made on the basis of the above-mentioned technical solutions all fall within the protection scope of the claims of the present utility model.

Claims (4)

1. A new type of shaft seal. The shaft seal includes a shaft seal body, an oil cup, a gland, and packing. The shaft seal body is arranged between the stirring shaft and the stuffing box, and the gland is arranged above the filler. Bolts and nuts fix the gland on the stuffing box, the oil cup is set in the middle of the stuffing, and one side of the shaft seal is set with a water jacket and a cooling water outlet. 2. The new shaft seal according to claim 1, characterized in that, the shaft seal further comprises a sealing ring, and the sealing ring is arranged outside the packing. 3. The new shaft seal according to claim 2, characterized in that, the shaft seal further comprises a bush, and the bush is arranged on the gland. 4. The novel shaft seal according to claim 3, characterized in that, the packing is arranged as an annular packing.