CN209706545U - A rotary kiln end face sealing structure - Google Patents

Abstract

The utility model discloses a kind of rotary kiln end face seal structure, including static components and moving ring assembly, the static components include at least two stationary rings；Two neighboring stationary ring forms a U-shaped sealed chamber；The side of static components is equipped with sliding ring；The sliding ring slides axially sealing on ring support；The ring support is fixed in the kiln hood of rotary kiln；The moving ring assembly includes rotating ring；The rotating ring is fixed at the external side of rotary kiln；In the U-shaped sealed chamber of rotating ring ring body insertion corresponding thereto；Radial clearance is equipped between the insertion end of rotating ring and U-shaped sealed chamber corresponding thereto；The first packing sealing ring is equipped between the both ends of the surface of rotating ring and U-shaped sealed chamber side corresponding thereto.The utility model seal member is less, and structure is simple, improves the sealing reliability of seal member, extends the service life of seal member, provides guarantee for the functional reliability of rotary kiln.

Description

A rotary kiln end face sealing structure

technical field

The utility model relates to the technical field of a rotary kiln, in particular to an end face sealing structure of a rotary kiln.

Background technique

Rotary kiln is a common equipment in the chemical industry. There is inevitably a gap between the rotating kiln body of the rotary kiln and the kiln tail cover. In order to prevent the outside air from being sucked into the rotary kiln and to prevent the gas in the kiln from carrying materials from the kiln tail cover, sealing parts are required on the rotary kiln. . There are many ways to seal the rotary kiln, but they all have different degrees of poor sealing and air leakage, especially when the inside of the rotary kiln is a positive pressure atmosphere, the gas leakage in the rotary kiln will pollute the air and cannot achieve environmental protection Require. The reason why the sealing of the rotary kiln is not tight is mainly because the existing sealing method cannot eliminate the radial deflection error generated when the rotary kiln rotates. The radial deflection error is caused by the large radial movement of the obliquely installed kiln body during the rotation of the rotary kiln and the shape error of the kiln body itself in the process of manufacturing, installation and operation, and the error amount reaches 15mm or even more. big. The kiln body of the rotary kiln will also produce axial movement during the rotation process, which will cause the sealing parts to be greatly bent and deformed, resulting in air leakage. In addition, the axial and radial movement of the rotary kiln body easily leads to high damage rate of sealing parts, high maintenance rate and difficulty in maintenance, which increases production costs.

Utility model content

In order to solve the above-mentioned existing technical problems, the utility model provides a rotary kiln end face sealing structure.

In order to achieve the above purpose, the utility model provides the following technical solutions: a rotary kiln end face sealing structure, including a static ring assembly and a moving ring assembly, the static ring assembly includes at least two static rings; two adjacent static rings form a U-shaped sealing chamber; one side of the static ring assembly is provided with a sliding sealing ring; the sliding sealing ring is axially slidably sealed on the annular support; the annular support is fixed on the kiln tail cover of the rotary kiln; The moving ring assembly includes a moving ring; the number of the moving ring is consistent with the number of U-shaped sealed chambers; the moving ring is fixed on the outside of the rotary kiln body; the moving ring body is inserted into the corresponding U-shaped sealed chamber; A radial gap is provided between the insertion end of the moving ring and the corresponding U-shaped sealing chamber; first packing sealing rings are arranged between both ends of the moving ring and the side faces of the U-shaped sealing chamber opposite to it.

Preferably, a second packing seal ring is provided on the outside of the sliding seal ring; a U-shaped groove is provided on the annular support; the ring body of the second packing seal ring is inserted into the U-shaped groove; the second packing seal ring There is a sliding seal tensioning device on the outside of the insertion end.

Preferably, the moving ring assembly further includes a moving ring flange; the moving ring flange is arranged outside the kiln body of the rotary kiln; the moving ring is fixed on the moving ring flange by moving ring fixing bolts.

When the rotary kiln is working, the moving ring is fixed on the kiln body and moves with the kiln body and rotates in the U-shaped sealed chamber. The two ends of the moving ring and the corresponding sides of the U-shaped sealing chamber form a sealing surface. The radial gap can adapt to the radial deflection error generated when the rotary kiln body rotates, convert the difficult radial deflection error into a controllable end face deflection error, and eliminate the damage caused by the radial deflection error of the sealing parts Air leakage and wear and tear. The sliding sealing ring is axially slidably sealed on the ring support through the second packing sealing ring, so that the static ring fixedly connected with the sliding sealing ring can overcome the force of rotating the static ring caused by the friction between the moving ring and the static ring and only Sliding with the axial movement of the rotary kiln, it eliminates the adverse effect on the sealing structure caused by the axial movement when the rotary kiln rotates, enhances the sealing performance of the sealing structure, and prolongs the service life of the sealing structure.

The utility model has fewer sealing parts and simple structure, can effectively solve the problem of air leakage caused by radial deflection error and axial movement when the rotary kiln rotates, and the problem of wear and tear on the sealing parts, and significantly improves the sealing performance of the sealing parts. The sealing reliability prolongs the service life of the sealing parts and guarantees the working reliability of the rotary kiln.

Description of drawings

Fig. 1 is the structural representation of the utility model.

FIG. 2 is an enlarged schematic diagram of point A in FIG. 1 .

In the figure: 1 U-shaped groove, 2 sliding seal tensioning device, 3 static ring, 4 ring bolts, 5 ring bracket, 6 sliding sealing ring, 7 moving ring, 8 moving ring flange, 9 cold air cover, 10 first Packing sealing ring, 11 radial clearance, 12 second packing sealing ring, 13 kiln tail cover, 14 kiln body.

Detailed ways

Further illustrate the embodiment of the present utility model below in conjunction with accompanying drawing.

See Figure 1-2, a rotary kiln end face sealing structure, including a static ring assembly and a moving ring assembly. The static ring assembly includes two static rings 3 . The two static rings 3 are connected by two rings with bolts 4 to form a U-shaped sealed chamber. One side of the stationary ring assembly is provided with a sliding seal ring 6 . The moving ring assembly includes a moving ring 7 and a moving ring flange 8 . The movable ring flange 8 is fixedly arranged on the outside of the cold air cover 9 of the rotary kiln body 14 . In specific implementation, the moving ring flange 8 can be an adjusting flange. The moving ring 7 is fixed on the moving ring flange 8 through the moving ring fixing bolts. The 7-ring body of the moving ring is inserted into the U-shaped sealed chamber. A radial gap 11 is provided between the insertion end of the moving ring 7 and the U-shaped sealing chamber. First packing sealing rings 10 are provided between the two ends of the moving ring 7 and the opposite sides of the U-shaped sealing chamber. In this embodiment, the first packing sealing ring 10 is made of flexible material. When the rotary kiln is working, the moving ring 7 is fixed on the kiln body 14 and moves with the kiln body 14 and rotates in the U-shaped sealed chamber. The two end surfaces of the moving ring 7 and the corresponding sides of the U-shaped sealing chamber form a sealing surface. The radial gap 11 can adapt to the radial deflection error generated when the rotary kiln body 14 rotates, convert the difficult radial deflection error into a controllable end face deflection error, and eliminate the radial deflection error caused by the sealing parts. Air leakage and abrasion caused.

The outer side of the sliding sealing ring 6 is provided with a second packing sealing ring 12 . The kiln tail cover 13 of the rotary kiln is fixedly provided with an annular support 5 . The annular bracket 5 is provided with a U-shaped groove 1 . The ring body of the second packing sealing ring 12 is inserted into the U-shaped groove 1 . The outer side of the insertion end of the second packing sealing ring 12 is provided with a sliding seal tensioning device 2 (the sliding sealing tensioning device 2 is a common technical means, and will not be described in detail). The sliding sealing ring 6 is axially slidably sealed on the annular support 5 through the second packing sealing ring 12, so that the static ring 3 fixedly connected with the sliding sealing ring 6 can overcome the static friction caused by the friction between the moving ring 7 and the static ring 3. The rotating force of the ring 3 only slides with the axial movement of the rotary kiln, eliminating the adverse effect on the sealing structure caused by the axial movement when the rotary kiln rotates, enhancing the sealing performance of the sealing structure and prolonging the service life of the sealing structure .

The sealing structure of this embodiment enables the machining assembly, and its shape error can be controlled within the range of 0.5 mm.

Claims (3)

1. A rotary kiln end face sealing structure, comprising a static ring assembly and a moving ring assembly, characterized in that: the static ring assembly includes at least two static rings; two adjacent static rings form a U-shaped sealed chamber; One side of the ring assembly is provided with a sliding sealing ring; the sliding sealing ring is axially slidingly sealed on the annular support; the annular support is fixed on the kiln tail cover of the rotary kiln; the moving ring assembly includes a moving ring; The number of the moving ring is consistent with the number of the U-shaped sealing chamber; the moving ring is fixed on the outside of the rotary kiln body; the ring body of the moving ring is inserted into the corresponding U-shaped sealing chamber; the insertion end of the moving ring and its Radial gaps are provided between the corresponding U-shaped sealing chambers; first packing sealing rings are provided between the two ends of the moving ring and the opposite sides of the U-shaped sealing chambers. 2. A rotary kiln end face sealing structure according to claim 1, characterized in that: the outer side of the sliding sealing ring is provided with a second packing sealing ring; the annular support is provided with a U-shaped groove; the second The ring body of the stuffing sealing ring is inserted into the U-shaped groove; the outer side of the insertion end of the second stuffing sealing ring is provided with a sliding sealing tensioning device. 3. A rotary kiln end face sealing structure according to claim 1, characterized in that: the moving ring assembly also includes a moving ring flange; the moving ring flange is arranged outside the rotary kiln body; the moving ring passes through the moving ring The fixing bolts are fixed on the moving ring flange.