Adjustable seal for a large gear cover of a mill

Abstract

This utility model relates to an adjustable pneumatic sealing device for a large gear cover in a mill, belonging to the field of mechanical engineering technology. The large gear cover has pneumatic sealing rings on both sides, and a pressure plate is installed on the outer side of each sealing ring. The pressure plate, sealing rings, and gear cover are fixed together as a unit by bolts a and nuts. An air source is connected to a pneumatic triplet, which is connected to the inlet of a flow control valve. The outlet of the flow control valve is connected to a two-position three-way valve, which is connected to the pneumatic sealing rings. A T-shaped seal is embedded in the sealing rings. The oil collection groove and the large gear are fixed together by bolts b and nuts. After the sealing rings are inflated, they expand radially under the constraint of the pressure plate, allowing the T-shaped seal to contact the oil collection groove and achieve a sealing effect. This utility model has advantages such as simple installation, convenient replacement, low manufacturing cost, and good sealing performance.

Description

Technical Field

[0001] This utility model provides an adjustable sealing device for the large gear cover of a mill, applicable to grinding mills in metal and non-metal mines, and belongs to the field of mechanical engineering technology. Background Technology

[0002] In my country's mining and production operations, ball mills are currently the main grinding equipment. In existing technologies, the large gear seals of mills are generally radial seals and end face seals, mostly using felt seals. After long-term operation, the felt seals wear out, and oil easily seeps out from the seal. The seeping lubricating oil accumulates and eventually flows into the outside of the large gear, causing lubricating oil waste and environmental pollution. The only solution is to frequently replace the felt for sealing, which generally has a poor sealing effect and requires frequent replacement, reducing work efficiency. Utility Model Content

[0003] The purpose of this invention is to solve the problems existing in the prior art and to provide an adjustable sealing device for the large gear cover of a mill.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] An adjustable sealing device for a large gear cover of a mill includes: an air source, a pneumatic triplet, a flow regulating valve, a two-position three-way valve, an inflatable sealing ring, a T-type seal, an inflatable sealing ring pressure plate, bolt a, a large gear cover, an oil collection groove, bolt b, and a large gear.

[0006] Inflatable sealing rings are provided on both sides of the large gear cover. An inflatable sealing ring pressure plate is provided on the outside of the inflatable sealing ring. The inflatable sealing ring pressure plate, the inflatable sealing ring, and the large gear cover are fixed as a whole by bolts a and nuts. The air source is connected to the pneumatic triplet through an air pipe. The pneumatic triplet is connected to the air inlet of the flow regulating valve through an air pipe. The air outlet of the flow regulating valve is connected to the two-position three-way valve through an air pipe. The two-position three-way valve is connected to the inflatable sealing ring through an air pipe. The T-shaped seal is embedded in the inflatable sealing ring. The oil collection groove and the large gear are fixedly connected by bolts b and nuts. After the inflatable sealing ring is inflated, it expands radially under the restriction of the inflatable sealing ring pressure plate, so that the T-shaped seal contacts the oil collection groove to achieve a sealing effect.

[0007] Furthermore, the air source is supplied by an air compressor.

[0008] Furthermore, the pneumatic triplet adjusts the air source between 0.1 and 0.3 MPa.

[0009] Furthermore, the gas flow regulating valve can control the gas flow rate supplied to the inflatable sealing ring.

[0010] Furthermore, the two-position three-way valve is normally closed, and the air intake and exhaust of the inflatable sealing ring are controlled by manually operating the two-position three-way valve.

[0011] Furthermore, the inflatable sealing ring has a circular open structure and is made of silicone.

[0012] Furthermore, the T-type seal and the inflatable sealing ring are connected in a C-type embedded manner.

[0013] Furthermore, the inflatable sealing ring pressure plate is a 3mm stainless steel plate arc-shaped stamped part.

[0014] Furthermore, the oil collection groove is a 5mm stainless steel plate arc-shaped stamped part.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention uses an air compressor to supply air to a pneumatic triple unit to adjust the air pressure. After adjustment, the pressure enters a gas flow regulating valve, and the adjusted flow rate enters a manual two-position three-way valve. The manual two-position three-way valve controls the amount of air entering the inflatable sealing ring. After receiving air, the inflatable sealing ring expands radially under the constraint of the inflatable sealing ring pressure plate, causing the T-seal to contact the oil collection groove. By adjusting the appropriate pre-tightening of the T-seal and the oil collection groove, the best sealing effect is achieved.

[0017] This utility model has the advantages of simple processing, low manufacturing cost, convenient installation, and adjustable sealing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an adjustable sealing device for a large gear cover of a mill according to the present invention.

[0019] Figure 2 This is a schematic diagram of an inflatable sealing ring and a T-shaped sealing structure for an adjustable sealing device for a mill gear cover, according to the present invention.

[0020] The attached diagram is labeled as follows: 1 is the air source; 2 is the pneumatic triplet; 3 is the flow regulating valve; 4 is the two-position three-way valve; 5 is the inflatable sealing ring; 6 is the T-type seal; 7 is the inflatable sealing ring pressure plate; 8 is bolt a; 9 is the large gear cover; 10 is the oil collection tank; 11 is bolt b; and 12 is the large gear. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings: This embodiment is implemented based on the technical solution of the present invention and provides detailed implementation methods, but the protection scope of the present invention is not limited to the following embodiments. Example

[0022] like Figure 1As shown, the adjustable sealing device for the large gear cover of a mill involved in this embodiment includes: an air source 1, a pneumatic triplet 2, a flow regulating valve 3, a two-position three-way valve 4, an inflatable sealing ring 5, a T-type seal 6, an inflatable sealing ring pressure plate 7, bolt a 8, a large gear cover 9, an oil collection groove 10, bolt b 11, and a large gear 12.

[0023] Inflatable sealing rings 5 ​​are provided on both sides of the large gear cover 9. An inflatable sealing ring pressure plate 7 is provided on the outer side of the inflatable sealing ring 5. The inflatable sealing ring pressure plate 7, the inflatable sealing ring 5, and the large gear cover 9 are fixed as a whole by bolts a8 and nuts. The air source 1 is connected to the pneumatic triplet 2 via an air pipe. The pneumatic triplet 2 is connected to the air inlet of the flow regulating valve 3 via an air pipe. The air outlet of the flow regulating valve 3 is connected to the two-position three-way valve 4 via an air pipe. The two-position three-way valve 4 is connected to the inflatable sealing ring 5 via an air pipe. Figure 2 As shown, the T-type seal 6 is embedded in the inflatable sealing ring 5. The oil collection groove 10 and the large gear 12 are fixedly connected to the nut by bolts b11. After the inflatable sealing ring 5 is inflated, it expands radially under the restriction of the inflatable sealing ring pressure plate 7, so that the T-type seal 6 contacts the oil collection groove 10 to play a sealing role.

[0024] In this embodiment, the air source 1 is supplied by an air compressor. The pneumatic triplet 2 adjusts the air source 1 between 0.1-0.3 MPa to provide the optimal pressure air source for the inflatable sealing ring 5. The gas flow regulating valve 3 controls the air flow rate supplied by the air source 1 to the inflatable sealing ring 5, controlling the slow expansion of the inflatable sealing ring 5 to protect it and prevent damage from excessive air intake. The two-position three-way valve 4 is normally closed, allowing manual operation to control the air intake and release of the inflatable sealing ring 5. This allows for optimal sealing by controlling the inflation of the inflatable sealing ring 5. When replacing the inflatable sealing ring 5 and the T-seal 6, the two-position three-way valve 4 can be operated to release the air source. The inflatable sealing ring 5 has a circular open structure for easy installation and disassembly. It is made of silicone and has wear-resistant, corrosion-resistant, and high-temperature resistant properties. The T-type seal 6 and the inflatable sealing ring 5 are connected by a C-type embedded connection, facilitating disassembly and replacement. They are made of silicone, which is wear-resistant, corrosion-resistant, and high-temperature resistant. The lower part of the T-type seal 6 and the oil collection groove 10 feature a three-line contact seal, improving the sealing effect. The inflatable sealing ring pressure plate 7 is a 3mm stainless steel plate arc-shaped stamped part. Six stamped parts with a 60° arc are bolted to the large gear ring cover along with the inflatable sealing ring. The oil collection groove 10 is a 5mm stainless steel plate arc-shaped stamped part. Four stamped oil collection grooves with a 90° arc are bolted to the large gear, ensuring a radial dimensional deviation of ±2mm during installation.

[0025] This invention integrates an inflatable sealing ring 5 with a three-seal assembly, which is installed within a sealing ring frame. The sealing ring frame and the large gear cover 9 are fixed together using bolts a8 and nuts. The oil collection groove 10 and the large gear 12 are fixed together using bolts b11 and nuts. The inflatable sealing ring 5 is inflated using an air source 1, causing it to expand radially and contact the three-seal assembly with the oil collection groove 10 on the large gear 12. As the large gear 12 rotates, lubricating oil on it splashes onto the junction of the three-seal assembly and the oil collection groove 10. The radial seal formed by the three-seal assembly and the oil collection groove 10 effectively prevents oil leakage, allowing the lubricating oil to return to the meshing point of the large gear 12 within the oil collection groove 10. This design serves the dual purpose of preventing dust from entering the gear and contaminating the lubricating oil, as well as preventing lubricating oil spillage. If the T-type seal 6 wears, the pressure of the pneumatic triplet 2 can be adjusted to increase the deformation of the inflatable sealing ring 5, thereby improving sealing performance and service life.

[0026] like Figure 1 As shown in this embodiment, the adjustable sealing device for the large gear cover of a mill operates on the following principle:

[0027] Air source 1 from the air compressor enters the pneumatic triplet 2 to adjust the air source pressure. After adjustment, the pressure enters the gas flow regulating valve 3. The adjusted air source then enters the manual two-position three-way valve 4. The manual two-position three-way valve 4 controls the amount of air entering the inflatable sealing ring 5. After receiving air, the inflatable sealing ring 5 expands and deforms under the constraint of the inflatable sealing ring pressure plate 7. Under the constraint of the inflatable sealing ring pressure plate 7, the inflatable sealing ring 5 expands and extends radially, so that the T-seal 6 contacts the oil collection groove 10. Adjusting the appropriate pre-tightening of the T-seal 6 and the oil collection groove 10 achieves the best sealing effect. If the T-seal 6 is worn and needs to be replaced, operate the manual two-position three-way valve 4 to release the compressed air, remove the T-seal 6, and replace it. After replacement, repeat the above operation to achieve the desired function.

[0028] The above description is merely a preferred embodiment of this utility model. These specific embodiments are different implementations based on the overall concept of this utility model, and the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An adjustable sealing device for a mill gear cover, characterized in that, include: Air source (1), pneumatic triplet (2), flow regulating valve (3), two-position three-way valve (4), inflatable sealing ring (5), T-type seal (6), inflatable sealing ring pressure plate (7), bolt a (8), large gear cover (9), oil collection groove (10), bolt b (11) and large gear (12); Inflatable sealing rings (5) are provided on both sides of the large gear cover (9). An inflatable sealing ring pressure plate (7) is provided on the outside of the inflatable sealing ring (5). The inflatable sealing ring pressure plate (7), the inflatable sealing ring (5) and the large gear cover (9) are fixed as a whole by bolts a (8) and nuts. The air source (1) is connected to the pneumatic triplet (2) through an air pipe. The pneumatic triplet (2) is connected to the air inlet of the flow regulating valve (3) through an air pipe. The air outlet of the flow regulating valve (3) is connected to the two The two-position three-way valve (4) is connected by an air pipe. The two-position three-way valve (4) is connected to the inflatable sealing ring (5) by an air pipe. The T-type seal (6) is embedded in the inflatable sealing ring (5). The oil collection groove (10) and the large gear (12) are fixedly connected to the nut by bolt b (11). After the inflatable sealing ring (5) is inflated, the inflatable sealing ring (5) expands radially under the restriction of the inflatable sealing ring pressure plate (7), so that the T-type seal (6) contacts the oil collection groove (10) to play a sealing role.

2. The adjustable sealing device for the large gear cover of a mill according to claim 1, characterized in that, The air source (1) is supplied by an air compressor.

3. The adjustable sealing device for the large gear cover of a mill according to claim 1, characterized in that, The pneumatic triplet (2) adjusts the air source (1) between 0.1-0.3 MPa.

4. The adjustable sealing device for the large gear cover of a mill according to claim 1, characterized in that, The flow regulating valve (3) can control the flow rate of the air source (1) supplied to the inflatable sealing ring (5).

5. The adjustable sealing device for the large gear cover of a mill according to claim 1, characterized in that, The two-position three-way valve (4) is normally closed. The air intake and exhaust of the inflatable sealing ring (5) are controlled by manually operating the two-position three-way valve (4).

6. The adjustable sealing device for the large gear cover of a mill according to claim 1, characterized in that, The inflatable sealing ring (5) has a circular open structure and is made of silicone.

7. The adjustable sealing device for the large gear cover of a mill according to claim 1, characterized in that, The T-type seal (6) and the inflatable sealing ring (5) are connected in a C-type embedded manner.

8. The adjustable sealing device for the large gear cover of a mill according to claim 1, characterized in that, The inflatable sealing ring pressure plate (7) is a 3mm stainless steel plate arc-shaped stamped part.

9. The adjustable sealing device for the large gear cover of a mill according to claim 1, characterized in that, The oil collection trough (10) is a 5mm stainless steel plate arc-shaped stamped part.

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