CN218325833U - A sealing device for preventing emulsion from entering bearing housing of tension measuring roller - Google Patents

Abstract

The utility model relates to a prevent that emulsion from entering into sealing device who surveys roller bearing, including skeleton oil blanket, oil slinger, sealed cowling, emulsion collecting vat, oil slinger fixed connection is on surveying the roller, sealed cowling and bearing frame fixed connection to the cover is outside at the oil slinger, is connected with the skeleton oil blanket between sealed cowling and the oil slinger, sealed cowling be connected with the emulsion collecting vat. The advantages are that: the framework oil seal, the oil slinger and the sealing cover are adopted to form three sealing protections for the tension measuring roller, so that the aim that high-temperature and high-pressure emulsion jet flow and atomized moisture cannot enter the inner cavity of the bearing seat is fulfilled, the bearing lubricating grease is ensured not to be emulsified and failed, the lubricating effect is ensured, and the service lives of the bearing and the tension measuring roller are prolonged.

Description

A sealing device for preventing emulsion from entering bearing housing of tension measuring roller

technical field

The utility model belongs to the field of lubricating protection, in particular to a lubricating, sealing and protecting device for tension measuring rolls of a cold continuous rolling mill.

Background technique

In the production of continuous cold strip steel, the tension measuring roll between the stands of the cold tandem rolling unit is one of the important equipment of the unit. The cold tandem rolling unit is composed of multiple stands, and the tension measuring rollers are arranged in two adjacent stands Between, see Figure 1. The tension measuring roller is composed of a roller, a roller shaft, a bearing and a bearing seat. The bottom of the bearing seat is installed on the base, and a tensiometer is installed under the base. When working, the tension measurement between the stands is fed back to the rolling mill control through the tensiometer. in the system.

As shown in Figure 2, the sealing form of the bearing housing of the existing tension measuring roller of the unit is a shaft diameter oil seal plus a water retaining ring. The following problems exist in the production process of the tension measuring roller between the cold tandem rolling stands: the bearings on both sides of the tension measuring roller The seat is washed by high-temperature and high-pressure emulsion spray, and the emulsion will enter the interior of the bearing seat through the gap between the retaining ring and the bearing seat along the contact surface between the spacer sleeve and the bearing seat seal, resulting in the emulsification failure of the bearing grease, causing the bearing to wear and tear. Fatigue, fracture, gluing and other deterioration failures lead to accidental downtime. It takes at least 6 hours for each accidental downtime to replace the tension measuring roller, resulting in strip scratches of about 50 tons per time.

Therefore, the average service life of the tension measuring roller is only about 2 months, which affects the continuous production of the unit, and takes a long time to deal with failures, resulting in insufficient equipment start-up rate and reducing the production capacity of cold-rolled strip products of the continuous unit. Therefore, there is a need for a seal guard for a tension roll.

Contents of the invention

In order to overcome the deficiencies of the prior art, the purpose of this utility model is to provide a sealing device that prevents the emulsion from entering the bearing seat of the tension measuring roller, and solve the problem that the high temperature and high pressure emulsion sprayed by the bearing of the tension measuring roller passes through the shaft during the rolling process of the rolling mill. The gap between the spacer on the neck and the seal of the bearing seat enters the cavity of the bearing seat, resulting in the failure of the grease emulsification, affecting the use of the bearing, and causing the equipment to shut down in an accident.

In order to achieve the above object, the utility model is realized through the following technical solutions:

A sealing device for preventing the emulsion from entering the bearing seat of the tension measuring roller, comprising a skeleton oil seal, an oil throwing ring, a sealing cover, and an emulsion collecting tank, the oil throwing ring is fixedly connected to the roller shaft of the tension measuring roller, and the sealing cover is fixed to the bearing seat connected and covered outside the oil throwing ring, a skeleton oil seal is connected between the sealing cover and the oil throwing ring, and the sealing cover is connected with the emulsion collection tank.

The oil throwing ring is provided with at least one groove along the axial direction of the tension measuring roller, and the sealing cover is provided with at least one protrusion matching the groove, and a hollow with a reciprocating zigzag linear section is formed between the oil throwing ring and the sealing cover. cavity.

The sealing cover is composed of an upper cover and a lower cover which are fixedly connected with each other, and the bottom of the lower cover is connected with an emulsion collection tank.

The upper cover is connected with a compressed air intake joint.

The emulsion collecting tank is provided with drainage holes.

Compared with the prior art, the beneficial effects of the utility model are:

The sealing device to prevent the emulsion from entering the bearing seat of the tension measuring roller is composed of three sealing protection measures. The first adopts a skeleton oil seal to prevent most of the emulsion from entering the cavity composed of the oil throwing ring and the sealing cover; the second A labyrinth seal composed of an oil throwing ring and a sealing cover is used to prevent the remaining emulsion from entering the cavity of the bearing housing. The formed spacer ring blocks the emulsion, and it flows into the emulsion collection tank at the bottom of the sealing cover by gravity, and is discharged from the outer discharge hole; the third channel passes through the compressed air inlet joint on the sealing cover, and is blown with compressed air Quickly discharge the residual emulsion and atomized moisture through the outer discharge hole and blow it away. Through the three sealing protection measures designed above, the purpose of high-temperature and high-pressure emulsion jet flow and atomized moisture cannot enter the inner cavity of the bearing seat, so as to ensure that the bearing grease does not emulsify and fail, ensure the lubrication effect, and extend the bearing and tension measurement. The cycle life of the roller ensures the safe and stable operation of the tension measuring roller. In addition, the sealing cover is composed of upper and lower covers, which can be quickly checked or replaced online, which is convenient for equipment maintenance and repair; it can effectively protect the lubrication of the bearings of the tension measuring roller without structural changes to the original equipment.

Description of drawings

Figure 1 is a schematic diagram of the layout of the tension rollers.

Fig. 2 is a schematic diagram of the connection between the original tension measuring roller and the bearing seat.

Fig. 3 is an exploded view of the utility model.

Fig. 4 is a schematic structural view of the utility model.

Fig. 5 is a front view of the upper cover.

Fig. 6 is a side view of the upper cover.

Fig. 7 is a plan view of the upper cover.

Fig. 8 is a front view of the lower cover.

Fig. 9 is a side view of the lower cover.

Fig. 10 is a plan view of the lower cover.

Fig. 11 is a front view of the sealing cover.

Fig. 12 is a side view of the seal cover.

Fig. 13 is a front view of the oil slinger.

Figure 14 is a side view of the oil slinger.

In the figure: 1-work roll 2-tension roll 3-strip 4-tension roll shaft 5-retaining ring 6-bearing housing 7-spacer 8-oil seal 9-skeleton oil seal 10-oil throwing ring 11-upper Cover 12-lower cover 13-compressed air inlet joint 14-emulsion collection tank 15-external discharge hole 16-screw hole 17-locating pin 18-screw 19-groove 20-seal cover.

detailed description

The utility model is described in detail below in conjunction with the accompanying drawings, but it should be pointed out that the implementation of the utility model is not limited to the following embodiments.

See Fig. 3, Fig. 4, Fig. 11, Fig. 12, a sealing device for preventing the emulsion from entering the bearing seat of the tension measuring roller, including a skeleton oil seal 9, an oil throwing ring 10, a sealing cover 20, an emulsion collecting tank 14, and an oil throwing The ring 10 is fixedly connected to the roller shaft 4 of the tension measuring roller, the sealing cover 20 is fixedly connected to the bearing seat 6, and covers the outside of the oil throwing ring 10, and a skeleton oil seal 9 is connected between the sealing cover 20 and the oil throwing ring 10, and the bearing The seat 6 is wrapped in a closed space with the roller surface and the roller shaft 4 of the tension measuring roller, which effectively prevents the emulsion from entering the inner cavity of the bearing seat 6 and prevents the grease from becoming emulsified. The skeleton oil seal 9 can prevent most of the emulsion from entering the sealing cover 20 . The sealing cover 20 is connected with the emulsion collection tank 14 .

See Fig. 13 and Fig. 14, the oil throwing ring 10 is provided with at least one groove 19 along the axial direction of the measuring roller, and the sealing cover 20 is provided with at least one protrusion matching the groove 19, the oil throwing ring 10 and the sealing cover 20 A cavity with a reciprocating zigzag linear section is formed between them, that is, a labyrinth sealed cavity. The emulsion entering the sealing cover 20 can be rapidly drained to the outside of the sealing cover 20 along the oil flinger 10 and the inner wall of the sealing cover 20 by gravity.

As shown in Figures 8-12, the sealing cover 20 is composed of an upper cover 11 and a lower cover 12 which are fixedly connected to each other. 12 ends are compacted on the end face of the bearing seat 6, and are fixed on the bearing seat 6 by four screws 18 of the upper and lower covers 11, 12, see Fig. 4 . Both the upper cover 11 and the lower cover 12 are provided with threaded holes 16 for installing screws 18 .

As shown in Figures 8-10, the bottom of the lower cover 12 is connected with an emulsion collection tank 14 to facilitate the deposition of the emulsion in the emulsion collection tank 14. The emulsion collection tank 14 is provided with an outer discharge hole 15, so that the emulsion can be discharged in time. In addition, as shown in Figures 5-7, the upper cover 11 is connected with a compressed air inlet joint 13, which can purge the gap between the oil flinger 10 and the bearing seat 6 and the labyrinth seal cavity to ensure that all residual emulsion is discharged .

The utility model is compact in structure, simple and reliable, low in manufacturing cost, and convenient for on-line quick maintenance and overhaul. It can significantly improve the cycle life of the tension measuring roller and the bearing, reduce the downtime of the unit, reduce the working intensity, reduce the consumption cost of spare parts, improve labor productivity, and reduce environmental pollution (the surface of the tension measuring roller is electroplated metal chrome coating, this device can reduce the consumption). Extend the replacement cycle of the tension measuring roller and reduce the consumption of tension measuring roller and bearing.

Claims (5)

1. The utility model provides a prevent that emulsion from entering into sealing device who surveys a roller bearing, its characterized in that, includes skeleton oil blanket, oil slinger, sealed cowling, emulsion collecting vat, and oil slinger fixed connection is on surveying a roller shaft, sealed cowling and bearing frame fixed connection to the cover is outside at the oil slinger, is connected with the skeleton oil blanket between sealed cowling and the oil slinger, and the sealed cowling is connected with the emulsion collecting vat.

2. The sealing device for preventing emulsion from entering a tension measuring roller bearing seat as claimed in claim 1, wherein the oil slinger is provided with at least one groove along the axial direction of the tension measuring roller, the seal cover is provided with at least one protrusion matched with the groove, and a cavity with a cross section in a reciprocating zigzag shape is formed between the oil slinger and the seal cover.

3. The sealing device for preventing emulsion from entering a bearing seat of a tension roller according to claim 1, wherein the sealing cover consists of an upper cover and a lower cover which are fixedly connected with each other, and the bottom of the lower cover is connected with an emulsion collecting tank.

4. The sealing device for preventing emulsion from entering a bearing seat of a tension measuring roller according to claim 3, wherein the upper cover is connected with a compressed air inlet joint.

5. The sealing device for preventing emulsion from entering a bearing seat of a tension roller as claimed in claim 1, wherein the emulsion collecting tank is provided with an outer discharge hole.

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