CN202082116U - Sealing device of slow cooling section circulating fan - Google Patents

Abstract

The utility model discloses a sealing device of a slow cooling section circulating fan. The sealing device comprises a sealing base, an air sealing element and a carbon sealing ring, as well as an inner end cover sealing piece, an external end cover sealing piece and an oil sealing element. Oil film seal between the carbon sealing element and a rotating shaft can be formed through the oil sealing element. Therefore, not only can the friction between the carbon sealing element and the rotating shaft be reduced, but also the sealing performance can be improved, oxygen is prevented from entering the fan, and the controllability of intra-furnace oxygen is ensured, so that the quality of products is favorably improved.

Description

The seal arrangement of slow cooling section circulating fan

Technical field

The utility model relates to Sealing, more particularly, relates to the seal arrangement of a kind of slow cooling section circulating fan.

Background technique

Stove slow cooling section circulating fan is the key equipment of cold rolling main line unit stove section, and it mainly acts on is to form the furnace atmosphere circulation, reduces belt steel temperature.See also shown in Figure 1ly, be provided with seal arrangement 10, when forming negative pressure in the blower fan, prevent that by seal arrangement 10 the outer oxygen of blower fan from entering in the blower fan under atmospheric effect in the rotating shaft 1 and fan casing 2 joints of circulating fan.Please in conjunction with shown in Figure 2, sealing device 10 comprises sealing seat 11, seal 12 and carbon seal ring 13, and sealing seat 11 is sheathed in the rotating shaft 1 and with casing 2 and fixes, and a cover seal 12 and quadruplet carbon seal ring 13 all are located in the sealing seat 11.

Sealing device 10 in actual use, there is following shortcoming: 1, mutual serious wear between carbon seal ring 13 and the rotating shaft 1, cause descend the working life of carbon seal ring 13, increased maintenance cost (expense of a cover carbon seal ring is about 10,000), and rotating shaft 1 wearing and tearing can cause fray to leak, cause oxygen to enter in the blower fan, must dismantle rotating shaft 1 and carry out surperficial spraying treatmen.2, tightness is relatively poor, and the leakage problem at carbon seal ring 13 places exists always, makes the interior oxygen content of stove be in all the time for uncontrollable state, has had a strong impact on the quality of production.

The model utility content

At the above-mentioned shortcoming that exists in the prior art, the purpose of this utility model provides the seal arrangement of a kind of slow cooling section circulating fan, and the sealing device can reduce the wearing and tearing of seal ring and bearing, improves sealability.

For achieving the above object, the utility model adopts following technological scheme:

The seal arrangement of this slow cooling section circulating fan comprises the sealing seat that is placed in the rotating shaft and fixes with fan casing, is located at seal and carbon seal ring in the sealing seat, also comprise and be fixedly arranged on the sealing seat two ends respectively and be placed in inside and outside end bracket enclosed in the rotating shaft, and be located at oil seal on the sealing seat, oil seal comprises oil storage ring cavity, transport pipe and fuelling coupling, the oil storage ring cavity is opened on the sealing seat inner side surface, and fuelling coupling is located on the sealing seat outer side surface and by transport pipe and is connected with the oil storage ring cavity.

Described carbon seal ring is a quadruplet, is one group with two covers, and symmetry is divided into the both sides of seal.

Described oil seal is two covers, is located at respectively between every group of carbon seal ring.

Described inside and outside end bracket enclosed is a seal felt.

In technique scheme, the seal arrangement of slow cooling section of the present utility model circulating fan comprises sealing seat, seal and carbon seal ring, also comprise inside and outside end bracket enclosed and oil seal, can in the gap of carbon Sealing and rotating shaft, form oil film seal by oil seal, rub thereby not only can reduce between carbon Sealing and the rotating shaft, but also can improve sealability, prevent that oxygen from entering in the blower fan, guaranteed the controllability of oxygen in the stove, the quality of product that helps improving.

Description of drawings

Fig. 1 is the mounting point schematic representation of the fan sealing device of prior art;

Fig. 2 is the sectional view of the fan sealing device of prior art;

Fig. 3 is the sectional view of the seal arrangement of slow cooling section of the present utility model circulating fan;

Fig. 4 is the sectional view along A-A line among Fig. 3.

Embodiment

Further specify the technical solution of the utility model below in conjunction with drawings and Examples.

See also shown in Figure 3, the seal arrangement 20 of slow cooling section of the present utility model circulating fan is basic identical with prior art, equally also comprise the sealing seat 21 that is placed in the rotating shaft 1 and fixes with fan casing, be located at seal 22 and carbon seal ring 23 in the sealing seat 21, different is, sealing device 20 also comprise be fixedly arranged on sealing seat 21 two ends respectively and be placed in the rotating shaft 1 in, outer end cap sealing 24,25, and be located at oil seal 26 on the sealing seat 21, in, outer end cap sealing 24,25 is seal felt, and oil seal 26 comprises oil storage ring cavity 261, transport pipe 262 and fuelling coupling 263, oil storage ring cavity 261 is opened on sealing seat 21 inner side surfaces, and fuelling coupling 263 is located on sealing seat 21 outer side surfaces and by transport pipe 262 and is connected with oil storage ring cavity 261.As an embodiment, described carbon seal ring 23 is a quadruplet, is one group with two covers, and symmetry is divided into the both sides of seal 22.Described oil seal 26 is two covers, is located at respectively between every group of carbon seal ring 23, and the fuelling coupling 263 in left side is located on the sealing seat 21 bottom outer side surfaces among Fig. 3, and the fuelling coupling 263 on right side is located on the sealing seat 21 upper outside faces.

Please in conjunction with shown in Figure 4, the working principle of sealing device 20 is as follows:

By adding sealing lubricant oil in 263 pairs of oil storage ring cavities of fuelling coupling 261, lubricant oil part in the oil storage ring cavity 261 is attached in the rotating shaft 1, in rotating shaft 1, form one deck oil film, and rotate, so formed one deck oil film seal with rotating shaft 1, oil film seal is except having cooling, lubricated carbon seal ring 23 and rotating shaft 1, reduce wearing and tearing, improve outside the effect in both working lifes, can also reduce the leakage of blower fan, prevent that oxygen from infiltrating in the blower fan from the gap, cause the rising of oxygen content in the stove.Simultaneously, in seal 22, feed nitrogen, not only play the effect of hermetic seal, but also can play cooling action by countershaft 1.Also have by inside and outside end bracket enclosed 24,25, can improve sealing effect, and also prevent the leakage of lubricant oil.In addition, because the symmetrical distribution of carbon Sealing helps the layout of oil storage ring cavity 261 and improves nitrogen-sealed effect.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model the above embodiment's variation, modification.

Claims (4)

1. the seal arrangement of a slow cooling section circulating fan comprises the sealing seat that is placed in the rotating shaft and fixes with fan casing, is located at seal and carbon seal ring in the sealing seat, it is characterized in that:

Also comprise and be fixedly arranged on the sealing seat two ends respectively and be placed in inside and outside end bracket enclosed in the rotating shaft, and be located at oil seal on the sealing seat, oil seal comprises oil storage ring cavity, transport pipe and fuelling coupling, the oil storage ring cavity is opened on the sealing seat inner side surface, and fuelling coupling is located on the sealing seat outer side surface and by transport pipe and is connected with the oil storage ring cavity.

2. the seal arrangement of slow cooling section as claimed in claim 1 circulating fan is characterized in that:

Described carbon seal ring is a quadruplet, is one group with two covers, and symmetry is divided into the both sides of seal.

3. the seal arrangement of slow cooling section as claimed in claim 2 circulating fan is characterized in that:

Described oil seal is two covers, is located at respectively between every group of carbon seal ring.

4. the seal arrangement of slow cooling section as claimed in claim 1 circulating fan is characterized in that:

Described inside and outside end bracket enclosed is a seal felt.

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