Material zero-pollution mechanical sealing device

Abstract

The utility model provides a mechanical sealing device with zero material pollution. The mechanical sealing device comprises a mechanical seal, the mechanical seal is installed on an equipment shaft, the mechanical seal and the equipment shaft form a sealing cavity, the mechanical seal comprises a shaft sleeve and a transmission ring, and the shaft sleeve and the transmission ring are arranged on the equipment shaft; one end of the gland is connected with equipment, and the other end of the gland is connected with the shaft sleeve; the shaft sleeve, the gland and the transmission ring divide the sealing cavity into a material cavity and an atmosphere cavity; a sliding seal is arranged at the end, close to the atmosphere cavity, of the joint of the gland and the shaft sleeve, and a clamping spring is connected to the sliding seal. According to the mechanical sealing device, fluid passes through a narrow bent space, heat is generated through friction, the flow speed of the fluid is reduced, the effect of reducing leakage is achieved, and the purpose of sealing is achieved. According to the mechanical seal, heat generation caused by direct contact friction of the sealing end face is avoided, cooling liquid is not needed, and therefore materials cannot be polluted.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to a mechanical seal device with zero material contamination. Background Technology

[0002] Dry-grip seals and wet-contact seals are both common mechanical seal methods. Dry-grip seals are mainly used to reduce wear and frictional heat in environments without fluid media. Their working principle relies on the tight fit between the contact surfaces of the dynamic and static sealing rings under the pressure of an elastic element, achieving a seal through relative sliding. Existing dry-grip seals include graphite-silicon carbide dry-grip and polymer-to-polymer dry-grip seals, but dry-grip seals lead to increased friction, thus increasing energy consumption. Wet-contact seals, on the other hand, refer to seals used in liquid-lubricated environments, where the lubrication of the lubricating fluid reduces friction between the dynamic and static rings, making them suitable for various industrial equipment requiring liquid lubrication. Wet-contact seals also involve direct contact between the sealing element and the mating part, generating friction and heat during rotation. Most existing dry-grip and wet-contact seals rely on direct contact friction between the sealing element and the mating part, leading to wear on the sealing surface and the need for coolant cooling due to frictional heat. However, since the coolant is externally sourced, it may contain impurities that contaminate materials, failing to meet current market demands. Utility Model Content

[0003] This utility model addresses the technical problems mentioned in the background section by providing a mechanical sealing device with zero material contamination.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] This utility model provides a mechanical seal device for zero material contamination. The mechanical seal device includes a mechanical seal mounted on a device shaft, forming a sealed cavity with the device shaft. The mechanical seal includes a bushing and a transmission ring, which are disposed on the device shaft. A pressure cap is provided on the bushing, with one end of the pressure cap connected to the device and the other end connected to the bushing.

[0006] The bushing, the gland, and the transmission ring divide the sealed cavity into a material cavity and an atmospheric cavity;

[0007] An air inlet is provided on the gland, and a mechanical seal is provided at the end of the connection between the gland and the bushing near the atmospheric cavity, with a retaining ring connected to the mechanical seal.

[0008] Preferably, the gland is mounted on the device by connecting screws.

[0009] Preferably, the transmission ring is connected with the shaft sleeve, the transmission ring is connected with the shaft sleeve through a set screw, and the transmission ring is located in the atmosphere cavity.

[0010] Preferably, a labyrinth seal is arranged on one side of the shaft sleeve close to the material cavity.

[0011] Preferably, a positioning block is arranged on one side of the shaft sleeve close to the transmission ring, and the positioning block is arranged on the shaft sleeve through an internal hexagonal cylindrical head screw.

[0012] Preferably, a rubber sealing ring is arranged at a connection position of the shaft sleeve and the equipment shaft, and the rubber sealing ring is arranged in a hole in the shaft sleeve.

[0013] The positive progress effect of the utility model lies in that: the utility model provides a mechanical sealing device with zero material pollution. The mechanical sealing device comprises a mechanical seal, the mechanical seal is installed on an equipment shaft, the mechanical seal and the equipment shaft form a sealing cavity, the mechanical seal comprises a shaft sleeve and a transmission ring, and the shaft sleeve and the transmission ring are arranged on the equipment shaft; a gland is arranged on the shaft sleeve, one end of the gland is connected with the equipment, and the other end is connected with the shaft sleeve; the shaft sleeve, the gland and the transmission ring divide the sealing cavity into a material cavity and an atmosphere cavity; an air inlet is arranged on the gland, a sliding seal is arranged at a connection position of the gland and the shaft sleeve close to one end of the atmosphere cavity, and a clamping spring is connected with the sliding seal. The mechanical sealing device of the utility model adopts fluid passing through a narrow curved space, friction generates heat, the flow rate of the fluid is reduced, the effect of reducing leakage is achieved, and the purpose of sealing is achieved. The mechanical seal does not involve direct contact friction of a sealing end face, heat generation is caused, a cooling liquid is not needed, and therefore, material pollution is not caused. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a structural schematic view of the mechanical sealing device with zero material pollution of the utility model.

[0015] Fig. 2 It is a structural expanded schematic view of the mechanical sealing device with zero material pollution of the utility model.

[0016] Legend: 1, mechanical seal; 2, equipment shaft; 3, sealing cavity; 4, shaft sleeve; 5, transmission ring; 6, gland; 7, air inlet; 8, sliding seal; 9, clamping spring; 10, connecting screw; 11, set screw; 12, labyrinth seal; 13, positioning block; 14, sealing ring; 15, internal hexagonal cylindrical head screw; 31, material cavity; 32, atmosphere cavity. DETAILED DESCRIPTION

[0017] The utility model will be further illustrated by way of examples below, but the utility model is not limited in the scope of the examples.

[0018] Example 1

[0019] like Figs. 1-2 As shown, this embodiment provides a mechanical seal device with zero material contamination. The mechanical seal device includes a mechanical seal 1, which is mounted on a device shaft 2, forming a sealed cavity 3 with the device shaft 2. The mechanical seal 1 includes a bushing 4 and a transmission ring 5, which are mounted on the device shaft 2. A pressure cap 6 is provided on the bushing 4, with one end connected to the device and the other end connected to the bushing 4. The bushing 4, pressure cap 6, and transmission ring 5 divide the sealed cavity into a material cavity 31 and an atmospheric cavity 32. An air inlet 7 is provided on the pressure cap 6, and a sliding seal 8 is provided at the end of the connection between the pressure cap 6 and the bushing 4 near the atmospheric cavity 32. A retaining ring 9 is connected to the sliding seal 8. In this embodiment, the pressure cap 6 is mounted on the device by connecting screws 10. A rubber sealing ring 14 is provided at the connection between the bushing 4 and the device shaft 1, and a rubber sealing ring is provided in the inner hole of the bushing 4. The sliding seal 8 is composed of a polymer material and a spring.

[0020] In this embodiment, a labyrinth seal 12 is provided on the side of the bushing 4 near the material cavity 31.

[0021] In this embodiment, the transmission ring 5 is connected to the bushing 4, and the transmission ring 5 is connected to the bushing 4 by the set screw 11. The transmission ring 5 is located in the atmospheric cavity 32.

[0022] In this embodiment, a positioning block 13 is provided on the side of the bushing 4 near the transmission ring 5. The positioning block 13 is installed on the bushing 4 by an internal hexagonal head screw 15.

[0023] This embodiment provides a mechanical seal device with zero material contamination. The mechanical seal device of this invention utilizes the frictional heat generated by fluid passing through a narrow, curved space, thereby reducing the fluid velocity and reducing leakage to achieve a seal. This mechanical seal does not involve direct contact friction between the sealing end faces, thus avoiding heat generation and eliminating the need for cooling liquid, thereby preventing contamination of the material.

[0024] The working principle of this invention is as follows: The starting shaft 2 transmits torque to the bushing 4 under the action of the power transmission ring 5 and the set screw 11, causing relative rotation between the bushing 4 and the pressure cap 6. A gas or inert gas, 0.1 to 0.2 MPa larger than the material in the material chamber 31, is introduced through the air inlet 7. The gas in the atmospheric chamber 32 undergoes two throttling cycles before passing through the sliding seal 8 to prevent leakage. After two throttling cycles, the material in the material chamber 31, combined with the labyrinth seal 12, creates a rigid air wall at the labyrinth seal 12 to prevent material leakage towards the bushing 4, achieving the desired sealing purpose. Since this seal has no end-face friction and no frictional heat is generated, it does not require coolant cooling, meaning it will not be contaminated by impurities in the coolant.

[0025] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A mechanical seal device for material without pollution, characterized in that, The mechanical seal device comprises a mechanical seal mounted on a device shaft, the mechanical seal forms a sealing cavity with the device shaft, the mechanical seal comprises a shaft sleeve and a transmission ring, the shaft sleeve and the transmission ring are arranged on the device shaft; a gland is arranged on the shaft sleeve, one end of the gland is connected with the device, and the other end is connected with the shaft sleeve; The shaft sleeve, the gland and the transmission ring divide the sealing cavity into a material cavity and an atmospheric cavity; An air inlet is formed in the gland, a mechanical seal is arranged at the end of the connection between the gland and the shaft sleeve close to the atmospheric cavity, and a clamping spring is connected to the mechanical seal.

2. A zero-pollution mechanical sealing device for material as claimed in claim 1, wherein, The gland is mounted on the device through a connecting screw.

3. A mechanical seal device with zero contamination of material according to claim 2, characterized in that, The transmission ring is connected with the shaft sleeve, the transmission ring is connected with the shaft sleeve through a locking screw, and the transmission ring is located in the atmospheric cavity.

4. A mechanical seal device with zero contamination of material according to claim 3, characterized in that, A labyrinth seal is arranged on the side of the shaft sleeve close to the material cavity.

5. A mechanical seal device with zero contamination of material according to claim 4, characterized in that, A positioning block is arranged on the side of the shaft sleeve close to the transmission ring, and the positioning block is mounted on the shaft sleeve through an internal hexagonal cylindrical head screw.

6. A mechanical seal device with zero contamination of material according to claim 5, characterized in that, A rubber sealing ring is arranged at the connection between the shaft sleeve and the device shaft, and the rubber sealing ring is arranged in the inner hole of the shaft sleeve.

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