Flexible stand mill pull rod sealing device

Abstract

The utility model discloses a sealing device, especially relate to a flexible vertical mill pull rod sealing device, include: the body is connected with the rubber body on the body, the rubber body sets up between the body and the sealing disc. The device has adopted the three -fold sealing structure of rubber body, sealing inner lining, soft connection expansion joint, and the possibility of dust, oil dirt etc. medium axial leakage along the pull rod is effectively prevented, and the reliability and service life of sealing are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of sealing equipment technology, and in particular to a flexible vertical mill tie rod sealing device. Background Technology

[0002] Given the structural characteristics of the Smith vertical mill, the pressure on its grinding rollers is achieved by a hydraulic cylinder pulling the rollers up and down via a tie rod. Since the grinding rollers are located inside the vertical mill, there is some space for movement between the tie rod and the rollers. Currently, a sealing disc is used for sealing, but this structure has two drawbacks: First, the high negative pressure and high air velocity inside the vertical mill make the sealing disc prone to being jammed by stones, creating large gaps and leading to serious air leakage and increased ineffective power consumption. Second, when the tie rod moves axially with the grinding rollers, it occasionally moves radially. If stones enter the gap between the tie rod shaft and the bushing, abnormal stress will be generated during the radial movement of the tie rod, which can easily cause the tie rod to break. Utility Model Content

[0003] In order to solve the problems existing in the prior art, this utility model provides a flexible vertical mill tie rod sealing device to solve the current technical problems.

[0004] The technical solution adopted by this utility model to solve its technical problem is: This utility model provides a flexible vertical mill tie rod sealing device, including: a body, on which a rubber body is connected, the rubber body being disposed between the body and a sealing disc.

[0005] Preferably, the rubber body is a ring-shaped rubber body with a trapezoidal cross-section, and the rubber body is connected to the sealing liner.

[0006] Preferably, the rubber body is fitted onto the pull rod, and the outer conical surface of the rubber body presses against the pull rod shell.

[0007] Preferably, the body is provided with a sealing liner for secondary sealing, and the sealing liner is connected to the rubber body.

[0008] Preferably, the other end of the sealing liner is connected to a flexible expansion joint, which is connected to the outer shell.

[0009] Preferably, the flexible expansion joint is fitted onto the tie rod to provide a three-stage seal.

[0010] Preferably, the sealing disc is fitted onto the pull rod.

[0011] Preferably, the inner surface of the rubber body is a cylindrical surface, and the outer surface of the rubber body is a conical surface.

[0012] Preferably, the body is a metal ring, which is fitted onto the pull rod, and the outer surface of the body is connected to the pull rod shell.

[0013] The beneficial effects of this utility model are: Multiple seals significantly improve sealing reliability: The device adopts a triple sealing structure of rubber body, sealing liner and soft expansion joint, which effectively prevents the possibility of leakage of media such as dust and oil along the tie rod axis, greatly improving the reliability and service life of the seal.

[0014] Rubber body design: A ring-shaped rubber body with a trapezoidal cross-section, its inner cylindrical surface tightly fitting the tie rod, and its outer conical surface pressing against the tie rod housing. This conical fit generates a self-tightening effect when the tie rod is under force or slightly misaligned, enhancing the sealing effect. The elasticity of the rubber itself can compensate for minor installation errors, vibrations, and radial runout between the tie rod and the housing.

[0015] Flexible expansion joint design: The flexible expansion joint connects the sealing liner and the outer shell, and is fitted onto the tie rod to form a third seal. Its flexibility can effectively absorb and compensate for the axial displacement of the tie rod caused by thermal expansion and contraction and changes in grinding roller pressure during mill operation, avoiding damage or failure of the seal due to rigid connection.

[0016] Effective protection of critical components: The multi-layer sealing structure effectively isolates the high concentration of dust and harsh environment inside the grinding chamber, protecting the tie rod itself and the components inside the tie rod housing from contamination and wear, thus extending its service life.

[0017] Reduced maintenance costs: Reliable seals reduce equipment failures and downtime caused by leaks, thus lowering maintenance costs and production losses. Components such as the rubber body and sealing liner are relatively easy to replace.

[0018] Improved working environment: Effectively prevents dust leakage, helps improve the working environment around the equipment, and meets environmental protection requirements. Attached Figure Description

[0019] The above-described aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the flexible vertical mill tie rod sealing device according to an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures

[0021] exist Figure 1 In the middle, there are: 1. Tie rod; 2. Flexible expansion joint; 3. Sealing liner; 4. Body; 5. Rubber body; 6. Sealing disc. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides a flexible vertical mill tie rod sealing device, including: a body 4, a rubber body 5 connected to the body 4, and the rubber body 5 being disposed between the body 4 and the sealing disc 6.

[0024] The rubber body 5 is a ring-shaped rubber body with a trapezoidal cross-section, and the rubber body 5 is connected to the sealing liner 3.

[0025] A rubber body 5 is fitted onto the tie rod 1, and the outer conical surface of the rubber body 5 presses against the tie rod housing. Both the tie rod 1 and the tie rod housing are existing technologies, and this application is for their sealing components.

[0026] The body 4 has a sealing liner 3 inside for secondary sealing, and the sealing liner 3 is connected to the rubber body 5.

[0027] The other end of the sealing liner 3 is connected to the flexible expansion joint 2, which is a flexible expansion joint connected to the outer shell. The rubber body 5, the sealing liner 3, and the flexible expansion joint 2 are all made of rubber.

[0028] The flexible expansion joint 2 is fitted onto the tie rod 1 to seal the tie rod 1 three times.

[0029] A sealing disc 6 is fitted onto the pull rod 1. The sealing disc 6 is a metal ring. The inner surface of the rubber body 5 is cylindrical, and the outer surface of the rubber body 5 is conical.

[0030] The main body 4 is a metal ring, which is fitted onto the pull rod 1. The outer surface of the main body 4 is connected to the pull rod shell.

[0031] The device adopts a triple sealing structure consisting of a rubber body 5, a sealing liner 3, and a flexible expansion joint 2. This layered protection effectively prevents the possibility of dust, oil, and other media leaking along the axial direction of the tie rod 1, greatly improving the reliability and service life of the seal.

[0032] A ring-shaped rubber body 5 with a trapezoidal cross-section has its inner cylindrical surface tightly fitted onto the tie rod 1, while its outer conical surface presses against the tie rod housing. This conical fit generates a self-tightening effect when the tie rod 1 is under force or slightly offset, enhancing the sealing effect. The elasticity of the rubber itself can compensate for minor installation errors, vibrations, and radial runout between the tie rod 1 and the housing.

[0033] The flexible expansion joint 2 connects the sealing liner 3 and the outer shell, and is fitted onto the tie rod 1 to form a third seal. Its flexibility can effectively absorb and compensate for the axial displacement of the tie rod 1 caused by thermal expansion and contraction, changes in grinding roller pressure, etc. during mill operation, and avoid damage or failure of the seal due to rigid connection.

[0034] The multi-layer sealing structure effectively isolates the high concentration of dust and harsh environment inside the grinding chamber, protecting the tie rod 1 itself and the internal components of the tie rod housing from contamination and wear, thus extending its service life.

[0035] Reliable sealing reduces equipment failures and downtime caused by leaks, lowering maintenance costs and production losses. Components such as the rubber body 5 and the sealing liner 3 are relatively easy to replace.

[0036] It effectively prevents dust leakage, helps improve the working environment around the equipment, and meets environmental protection requirements.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flexible vertical mill tie rod sealing device, comprising: The body is characterized in that: a rubber body is connected to the body, the rubber body is disposed between the body and the sealing disc; the rubber body is a ring-shaped rubber body with a trapezoidal cross-section, the rubber body is connected to the sealing liner; the other end of the sealing liner is connected to a flexible expansion joint, the flexible expansion joint is connected to the outer shell.

2. The flexible vertical mill tie rod sealing device according to claim 1, characterized in that: The rubber body is fitted onto the pull rod, and the outer conical surface of the rubber body presses against the pull rod shell.

3. The flexible vertical mill tie rod sealing device according to claim 1, characterized in that: The body has an internal sealing liner for secondary sealing, which is connected to the rubber body.

4. The flexible vertical mill tie rod sealing device according to claim 1, characterized in that: The flexible expansion joint is fitted onto the tie rod, providing a three-stage seal.

5. The flexible vertical mill tie rod sealing device according to claim 1, characterized in that: The sealing disc is fitted onto the pull rod.

6. The flexible vertical mill tie rod sealing device according to claim 1, characterized in that: The inner surface of the annular rubber body is cylindrical, and the outer surface of the rubber body is conical.

7. The flexible vertical mill tie rod sealing device according to claim 1, characterized in that: The main body is a metal ring, which is fitted onto the pull rod, and the outer surface of the main body is connected to the pull rod shell.

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