CN221921984U - A roll neck sealing device for an oil film bearing with double oil sealing lines - Google Patents

Abstract

The utility model discloses a roll neck sealing device for an oil film bearing with double oil sealing defense lines, which mainly comprises a neck sealing piece and a sealing cover, wherein the neck sealing piece comprises an annular sealing body with a slot and a sealing part inserted in the slot, one side of the sealing part, which is close to the oil film bearing, is connected with an oil sealing lip extending out of the oil film bearing, two sides of the end part of an adsorption neck of the annular sealing body are respectively connected with a dynamic water sealing lip and a static water sealing lip, a groove is formed between the dynamic water sealing lip and the static water sealing lip, and the other side, which is far away from the oil film bearing, of the sealing part is connected with an oil sealing auxiliary lip extending out of the oil film bearing. After the oil sealing device is applied, the oil sealing lip and the oil sealing auxiliary lip of the sealing part face the direction of the oil film bearing and are contacted with the inner hole surface of the sealing cover to form two dynamic sealing oil sealing defense lines, so that the oil sealing capacity is greatly improved, the running stability of the sealing assembly is improved, and the safe running of the oil film bearing is ensured.

Description

A roll neck sealing device for an oil film bearing with double oil sealing lines

Technical Field

The utility model relates to an oil film bearing sealing device for a hot rolling mill of a steel enterprise, in particular to a roll neck sealing device for an oil film bearing with double oil sealing lines.

Background Art

There are many forms of oil film bearing sealing devices for the support rollers of hot strip rolling mills in steel companies. In the past, sealing components have long relied on imports and the structural form was relatively simple. With the promotion of localization, the sealing structure is also constantly being replaced and upgraded, which has played a positive role in saving grease for steel companies, reducing the labor intensity of workers, and saving rolling costs.

The oil film bearing sealing device mainly plays the dual role of preventing the internal lubricating oil of the oil film bearing from leaking and preventing the external cooling water and impurities such as iron oxide from entering the oil film bearing. In the prior art, an invention patent named "Oil Film Bearing Sealing Device" is disclosed, and the authorization announcement number is "CN 101338818B". Its structural principle is as follows: the main seal is composed of a neck seal A and a sealing part B, and the sealing part B is sleeved in the groove of the neck seal A. The neck seal A and the sealing part B are clamped at the roll neck of the roller by the steel belt 1 of the B part, and a tightening steel belt 2 is sleeved in the groove between the dynamic sealing water lip 3 and the static sealing water lip 4 of the neck seal A. When the rolling mill is working, the neck seal A and the seal part B rotate in the bushing 7 together with the roller 5 and the cone sleeve 6, the sealing cover 8 is fixed on the bearing seat 9, the oil sealing lip 10 of the sealing part B contacts the inner hole surface of the sealing cover to form a dynamic sealing oil sealing line, the water sealing lip 11 of the sealing part B contacts the inner hole surface of the sealing cover to form a dynamic sealing water sealing line, the dynamic sealing water lip of the neck seal A contacts the side of the sealing cover to form a dynamic sealing water sealing line, and the static sealing water lip of the neck seal A contacts the end face of the roller to form a static sealing water sealing line. In addition, the flange water seal 12 and the protective water seal 13 fixed on the sealing cover are respectively in contact with the roller to form a dynamic sealing water sealing line. This sealing structure has a better sealing effect, especially the water sealing capacity is significantly improved compared with various previous sealing structures. However, there are currently several deficiencies that need to be optimized and improved: First, there are more dynamic seal water sealing lines, a total of four, while there is only one dynamic seal oil sealing line. As a result, under certain on-site working conditions, the water sealing capacity is excessive and the oil sealing capacity is insufficient; Second, the fitting surfaces of the neck seal A and the sealing part B are smooth, which is prone to relative movement, and sometimes causes the seal creeping phenomenon of the sealing part B, affecting the sealing effect; Third, the tight steel belt installed on the neck seal A has the function of controlling the outward expansion of the installed part, but cannot prevent the installed part from shrinking inward, so it has limited effect on the posture stability of the installed part.

Utility Model Content

The purpose of the utility model is to overcome the above-mentioned shortcomings and propose a roller neck sealing device for an oil film bearing with double oil sealing lines. The utility model can effectively enhance the oil sealing ability and improve the operating stability of the sealing component, thereby ensuring the safe operation of the oil film bearing.

In order to solve the above technical problems, the utility model discloses a roller neck sealing device for an oil film bearing with double oil sealing lines, which mainly comprises a neck seal and a sealing cover, wherein the neck seal comprises an annular sealing body with a slot and a sealing portion inserted in the slot, the sealing portion is connected with an oil sealing lip extending obliquely toward the oil film bearing on one side adjacent to the oil film bearing, a dynamic water sealing lip and a static water sealing lip are respectively connected on both sides of the adsorption neck end of the annular sealing body, a groove is formed between the dynamic water sealing lip and the static water sealing lip, and the other side of the sealing portion away from the oil film bearing is connected with an oil sealing auxiliary lip extending obliquely toward the oil film bearing.

After adopting the above technical features, the oil sealing lip and the auxiliary oil sealing lip of the sealing part are both facing the direction of the oil film bearing, contacting with the inner hole surface of the sealing cover to form two dynamic sealing oil sealing lines, thereby greatly improving the oil sealing capacity and improving the stability of the operation of the sealing component, thereby ensuring the safe operation of the oil film bearing.

As an improvement of the utility model, an L-shaped skeleton is embedded and vulcanized in the groove formed between the dynamic water sealing lip and the static water sealing lip.

The adoption of the above technical features is conducive to maintaining the posture stability of the dynamic water sealing lip and the static water sealing lip, and improving the sealing effect and the service life of the sealing component.

As a further improvement of the present invention, installation grooves are evenly spaced along the bottom of the slot, and correspondingly, installation protrusions that can be just inserted into the corresponding installation grooves are evenly spaced on the inner circumference of the sealing portion.

After adopting the above technical features, it is possible to effectively avoid sealing failure caused by relative rotation between the sealing part and the neck seal.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG. 1 is a schematic diagram of the structure of a partial use state of an oil film bearing sealing device in the prior art.

FIG. 2 is a schematic diagram of the structure of a roller neck sealing device for an oil film bearing with double oil sealing lines according to the utility model in a partial usage state.

FIG. 3 is a combined structural diagram of the neck seal A and the sealing portion B in the present invention.

FIG. 4 is a cross-sectional view of the neck seal A of the present invention.

FIG. 5 is a cross-sectional view of the sealing portion B of the present invention.

FIG. 6 is a schematic diagram of a partial three-dimensional structure of the neck seal A in the present invention.

FIG. 7 is a schematic diagram of a partial three-dimensional structure of the sealing portion B of the present invention.

DETAILED DESCRIPTION

FIG. 1 is a schematic diagram of the structure of a partial use state of an oil film bearing sealing device in the prior art.

Referring to Figures 2 to 7, the utility model is a roller neck sealing device for an oil film bearing with a double oil sealing defense line. Compared with the oil film bearing sealing device in the above-mentioned prior art, the following improvements are mainly made: first, the structure of the sealing part is improved, specifically, the structure of the water sealing lip 11 of the sealing part B is adjusted so that its lip is oriented in the same direction as the oil sealing lip 10 to form an oil sealing auxiliary lip 110; second, the tight steel belt 2 in the groove 121 formed between the dynamic water sealing lip 3 and the static water sealing lip 4 on both sides of the end of the adsorption neck 102 of the annular sealing body 100 of the neck seal A is removed, and as an improvement, an L-shaped skeleton 122 is embedded and vulcanized in the groove formed between the dynamic water sealing lip and the static water sealing lip; third, installation grooves 111 are evenly spaced along the bottom of the slot 101, and correspondingly, installation protrusions 112 that can be just inserted into the corresponding installation grooves are evenly spaced on the inner circumference of the sealing part.

The utility model is installed between the bearing seat and the roll neck when in use. When the rolling mill is working, the neck seal A and the sealing part B rotate in the bushing together with the roll and the cone sleeve, and the sealing cover is fixed on the bearing seat. The oil sealing lip 10 and the oil sealing auxiliary lip 110 of the sealing part B are both facing the direction of the oil film bearing, and contacting with the inner hole surface of the sealing cover to form two dynamic sealing oil sealing lines, thereby greatly improving the oil sealing capacity. The dynamic sealing water lip of the neck seal A contacts with the side of the sealing cover to form a dynamic sealing water sealing line, and the static sealing water lip of the neck seal A contacts with the end face of the roll to form a static sealing water sealing line. Since an L-shaped skeleton is embedded and vulcanized between the dynamic sealing water lip and the static sealing water lip, it is beneficial to maintain the posture stability of the dynamic sealing water lip and the static sealing water lip, and improve the sealing effect and the service life of the seal. In addition, the flange water seal and the protective water seal fixed on the sealing cover are respectively in contact with the roll to form a dynamic sealing water sealing line. By adopting the technical feature that the bottom of the slot is evenly spaced with mounting grooves, and correspondingly the inner circumference of the sealing part is evenly spaced with mounting protrusions 112 that can just be inserted into the corresponding mounting grooves, it can effectively avoid sealing failure caused by relative rotation between the sealing part B and the neck seal A.

It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the embodiments of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.

Claims (3)

1. The utility model provides a roll neck sealing device for oil film bearing with two oil seal defense lines, mainly includes neck sealing spare and sealed lid, and neck sealing spare is including taking the annular seal body of slot and the sealing part of grafting on the slot, and one side that sealing part is close to oil film bearing even has the oil seal lip that the slant oil film bearing stretches out, and the absorption neck tip both sides of annular seal body are even respectively to have dynamic seal water lip and quiet seal water lip, are formed with the recess between dynamic seal water lip and the quiet seal water lip, its characterized in that: the other side of the sealing part, which is far away from the oil film bearing, is connected with an oil sealing auxiliary lip which extends out of the inclined oil film bearing.

2. A roll neck seal for an oil film bearing having dual oil seal lines as set forth in claim 1 wherein: an L-shaped framework is embedded and vulcanized in a groove formed between the movable water sealing lip and the static water sealing lip.

3. A roll neck seal for an oil film bearing having dual oil seal lines as set forth in claim 1 wherein: mounting grooves are uniformly distributed along the groove bottom of the slot at intervals, and correspondingly mounting lugs which can be just inserted into the corresponding mounting grooves are uniformly distributed on the inner circumference of the sealing part at intervals.