CN2169103Y

CN2169103Y - Rotary kiln sealer with flexible connecting cover

Info

Publication number: CN2169103Y
Application number: CN 93229304
Authority: CN
Inventors: 王福林
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-24
Filing date: 1993-09-24
Publication date: 1994-06-15
Anticipated expiration: 2003-09-24

Abstract

The utility model discloses a rotary kiln sealer. More specifically, the rotary kiln sealer is a sliding bearing composed of an inner ring for fixing a kiln body and a fixing outer ring which is connected with the flexible cover of a flexible connection. The longitudinal cross-section of the bearing outer ring is in a ladder shape, and the lower part is sheathed with a sealing ring which does sliding friction with the bearing inner ring. The bearing outer ring is fixed by a guiding disk chuck and a guide rod. A thermal cover is positioned at the lower side of the bearing. The utility model has the advantages of simple structure, easy manufacture and installation, low cost, and excellent dynamic sealing effect.

Description

Rotary kiln sealer with flexible connecting cover

The utility model relates to a kind of seal of rotary kiln device that has the flexible cover that is flexible coupling.

Rotary kiln is required main setting in cement plant, alumina producer and other chemical metallurgy enterprise.Rotary kiln generally is to operate under negative pressure, at rotating kiln body component be fixedly coupled device, between kiln hood cover, kiln hood, inevitably there is the slit, reach in the kiln at some position (as the kiln hood cover) for preventing that outside air is inhaled into, prevent that furnace air from carrying material and leaking, sealing device must be arranged.

In the kiln operation air quantity there is certain requirement.Kiln hood can improve excess air coefficient and reduce flame temperature if bleed excess air, the excess air if the plain kiln kiln hood of charcoal bleeds, the excessive scaling loss of material that can cause carbonaceous, reduce casting yield, the air if plain boiled water stall kiln hood bleeds can make the white cement clinker oxidation, reduce the white cement whiteness, influence product quality, the kiln tail can make the exhaust blower load increase if bleed excess air, increase power consumption, and reduce kiln hood secondary wind inlet.

In the kiln operation composition of air is also had certain requirement, the air that bleeds in the hydrogen fluoride reaction stove can make the hydrogen fluoride gas concentration as the kiln product reduce, the flue gas of nickel ore concentrate calcining kiln contains a large amount of sulfur dioxide, be to can be used to make the sulfuric acid byproduct, leak out too much, cause concentration to reduce equally.The also strict sealing of the reduction roasting kiln of steel and iron industry makes to keep reducing atmosphere in the kiln.

The kiln hood negative pressure is smaller, and the pressure that is positioned at whole system malleation also occurs near zero point occasionally, seals badly, and material can gush out in the kiln, is called " attacking in retaliation ", also need be sealed.For this reason, the seal of rotary kiln device is extremely important.

The seal of rotary kiln device is rotating kiln body and the fixing kiln hood of two ends, the device that the kiln hood is connected, makes it joint gap under the positive and negative pressure operation, does not leak out in the kiln, does not attack in retaliation, and to the basic demand of seal of rotary kiln device be: sealing will be got well, and reliably.But applied several hermetically-sealed constructions all can not guarantee sealing at present, as: (1) labyrinth type: hermetically-sealed construction is simple, not wearing and tearing, but the gap is big, and sealing effectiveness is poor; (2) axial contact: loose collar is pressed on the retainer ring by spring, and is that pine is enclosed within on the kiln body, so that the kiln body moves freely and swings.Because the result of pine cover has produced the place of leaking out.In order to overcome above-mentioned shortcoming, people design and a kind ofly move but the quill that do not rotate with the kiln body, are provided with two sealing rings, one is fixing, an activity, but bring very big difficulty to processing, form tolerance when promptly being difficult to guarantee two loop contacts does not guarantee sealing; (3) contact radially: radially have contact-making surface to prevent the device of airflow between kiln body and potted component, though structure is simple, can not guarantee not leak out, sealing reliability is poor.In a word, present designers design a variety of, but because problems such as processing all can not produce a desired effect, sealing does not all have good solution to kiln in countries in the world.

The purpose of this utility model provides a kind of seal of rotary kiln device of guaranteeing not leak, do not attack in retaliation that has the flexible cover that is flexible coupling.

The purpose of this utility model is achieved in that being provided with one on the kiln body that rotates comprises that the sliding bearing of inside and outside circle seals, the inner ring of its bearing can be fixed on the kiln body, the bearing outer ring that does not rotate is connected with a flexible cover that is flexible coupling, the bearing outer ring longitudinal cross-section is the T font, its underpart is with sealing ring, this ring and bearing inner race sliding friction.But the flexible cover compression resistance 0.05Mpa that is flexible coupling, 800 ℃ of heatproof degree, compressible.Can stretch, move up and down with compensation kiln body, simultaneously can angular variation, lateral shift and reversing, bearing outer ring is fixed by guiding floral disc and guide post, and heat shield is in the bearing below, thereby guarantees the sealing of sealing ring, and Sealing of Rotary Kiln is guaranteed.

Accompanying drawing is a user mode schematic diagram of the present utility model.

The utility model is described in further detail below in conjunction with accompanying drawing.

The utility model is arranged on the kiln body 8, it comprises heat shield 1, guiding floral disc 2, bearing inner race 3, bearing outer ring 4, outer ring 4 is connected with a flexible cover that is flexible coupling, the longitudinal cross-section of outer ring 4 is T-shaped, its underpart is with sealing ring 5, bearing outer ring 4 is fixed by guiding floral disc and guide post, and heat shield is in the bearing below, when inner ring 3 rotates in company with kiln body 8, outer ring 4 is fixed by guide post 7 and is not rotated, sealing ring 5 and inner ring 3 sliding frictions form radial seal, when the kiln body when opposite side moves, sealing ring 5 contacts with inner ring 3 opposite sides, the flexible cover 6 that is flexible coupling, compensation kiln body moves up and down, and radially jumping during rotation and end are jumped and angular variation, thereby guarantee the end face contact of sealing ring, and flexible be flexible coupling the cover high temperature resistant 800 ℃, withstand voltage 0.05Mpa can guarantee the reliability that seals fully.

The seal of rotary kiln device with flexible connecting cover by the utility model manufacturing can obtain following good effect:

1, good seal performance can adapt to 800 ℃ of high temperature at the kiln hood place, can adapt to negative pressure 60mm water column at kiln tail place, can adapt to 0.05Mpa during malleation.

2, the utility model can adapt to the form error (circularity, end face run-out and circular runout) of kiln body and rotate in vertically reciprocal play, its axial stretching can reach 200mm, transversal displacement ± 10%, but angular variation and reversing.

3, light abrasion, easy care and maintenance.

4, simple in structure, easily processing, easy installation, low cost.

Claims

1, a kind of seal of rotary kiln device, it is characterized in that: by forming sliding bearing for fixing to the inner ring of kiln body and not mobile outer ring, the bearing outer ring that does not rotate is connected with a flexible cover that is flexible coupling, the longitudinal cross-section of bearing outer ring is the T font, its underpart is with sealing ring, this ring and bearing inner race sliding friction, bearing outer ring is fixed by guiding floral disc and guide post, and heat shield is in the bearing below.