CN215110509U - Oil-gas isolation seal for roller - Google Patents

Abstract

The utility model provides a roll oil gas isolation is sealed, include: the lower parts of the left side seal and the right side seal of the double-end four-lip special-shaped dynamic seal are respectively provided with two lips; the left side seal and the right side seal are respectively embedded in the metal framework; a static pressure 0-shaped sealing ring embedded on the lip is arranged above the lip; the double-end four-lip special-shaped dynamic seal is arranged between the inner circular surface of the end cover of the bearing seat of the supporting roll and the support transition distance ring, the lip is pressed on the support transition distance ring, and a closed chamber is formed between the left side seal and the right side seal; the static pressure 0-shaped sealing ring embedded above the metal framework is used for sealing the metal framework and the inner circular surface of the end cover of the bearing seat of the supporting roller; the steam source, the gas cable, the hole formed on the end cover of the bearing seat of the supporting roller, the hole formed on the U-shaped metal framework and the closed cavity are sequentially connected, and oil steam with pressure is filled in the closed cavity. The utility model discloses prevent outside medium to get into roller bearing and lubricating oil system, solve the problem that the oil emulsification of lubrication station is rotten and roller bearing damages.

Description

Oil-gas isolation seal for roller

Technical Field

The utility model belongs to a steel rolling machinery field, concretely relates to seal structure of steel rolling machinery's roll.

Background

Cold rolling mill group rolling mill belongs to the key equipment of unit, and the ubiquitous external medium in the existing steel rolling field gets into roller bearing and lubricating oil system problem like water or emulsion etc. causes the equipment operation in-process more the roller bearing locking that appears to burn out, and rolling mill lubrication station hydrovalve card hinders, influences normal production rolling to frequently cause 40m lubricating station fluid to become invalid in year, reduced production efficiency and improved manufacturing cost.

The roller back-up roll bearing has serious pitting corrosion and frequent clamping stagnation and burning loss; the thin oil lubrication system controls the blocking failure of a hydraulic valve and the emulsification and deterioration failure of oil in the lubricating oil system. The roll gap error, pressure and roll gap AGC frequent abnormal response follow-up compensation of the rolling mill are indirectly influenced, and the roll gap AGC frequent abnormal response follow-up compensation becomes a great hidden danger of rolling production.

Thin oil lubrication system of a support roller bearing and a thin oil lubrication system oil tank 40m, wherein one of the fixed maintenance items in each week is to drain water from the thin oil lubrication tank, the water is black and is a precipitation mixture of water, a floating liquid and lubricating oil, and the lubricating oil is emulsified and deteriorated to lose efficacy. The blackish mixture and the lubricating oil lubricate the bearing of the support roller during rolling, and as a result, the bearing of the support roller has short service life due to pitting transition damage. Meanwhile, the pollution of the lubricating oil system causes the blockage of hydraulic control elements such as an overflow valve, an electromagnetic valve and the like.

Disclosure of Invention

The utility model provides a roll oil gas isolation is sealed, its purpose is solved prior art's shortcoming, prevents outside medium entering roller bearing and lubricating oil system, solves the problem that the oil emulsification of lubrication station is rotten and roller bearing damages.

The roller oil-gas isolation seal is characterized in that the lower parts of a left side seal and a right side seal of a double-head four-lip special-shaped dynamic seal are respectively provided with two lip openings;

the left side seal and the right side seal are respectively embedded in the metal framework;

a static pressure 0-shaped sealing ring embedded on the lip is arranged above the lip;

the double-end four-lip special-shaped dynamic seal is arranged between the inner circular surface of the end cover of the bearing seat of the supporting roll and the support transition distance ring, the lip is pressed on the support transition distance ring, and a closed chamber is formed between the left side seal and the right side seal; the static pressure 0-shaped sealing ring embedded above the metal framework is used for sealing the metal framework and the inner circular surface of the end cover of the bearing seat of the supporting roller;

the steam source, the gas cable, the hole formed on the end cover of the bearing seat of the supporting roller, the hole formed on the U-shaped metal framework and the closed cavity are sequentially connected, and oil steam with pressure is filled in the closed cavity.

The air source is an oil mist lubrication system or a combination of an air compressor and an oil mist device.

The metal framework and the double-head four-lip special-shaped dynamic seal are firmly attached by adopting vulcanization gluing.

The metal framework is in clearance fit with the inner circular surface of the end cover of the bearing seat of the supporting roll, and the static pressure O-shaped sealing ring is elastically deformed and sealed.

The outer end of the hole formed on the end cover of the bearing seat of the support roller is provided with a connector in a threaded manner, and the connector is connected with an air cable.

Has the advantages that:

the utility model discloses an integrative combination formula is sealed: 2 pieces of sealing glue are combined into a whole in the metal framework, the outer ring is sealed by a 0-shaped ring, the inner ring is sealed by a lip, and the steam pressure has no leakage and has good pressure stability; the outer ring is provided with a metal framework, the strength is high, the rigidity is good, the coaxiality of the inner ring and the outer ring in a working state is guaranteed to be reliable, and the radial stress deformation of the whole sealing body is small.

The utility model discloses lubricated dynamic pressure seal lip of oil vapour, the airtight cavity of static pressure O shape seal, it is sealed to utilize oil vapour pressure to rise and tighten and lubricated dysmorphism, isolated external environment medium gets into roller bearing and lubricating oil system, implement the oil of back lubrication system and do not have the emulsification metamorphism, the hydrovalve during operation does not have the card and hinders the phenomenon and take place, roller bearing outward appearance is impurity-free and does not have the dechromization rust-free not damaged, the result of use is showing and is improving, the oil gas keeps apart that sealing performance is excellent, the range of application is wide, therefore, the clothes hanger is strong in practicability, the simple operation

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a perspective view of a partial section of the sealing structure of the present invention;

FIG. 2 is a schematic view showing an installation and usage state of the present invention;

fig. 3 is a second schematic view of the installation and use state of the present invention;

fig. 4 is a third schematic view of the installation and use state of the present invention.

Detailed Description

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained according to the drawings without inventive labor. In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "upper", "lower", "inner", "outer", "bottom", and the like as used herein are used in the description to indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, 2, 3, and 4:

the roller oil-gas isolation seal consists of six parts, namely a double-head four-lip special-shaped dynamic seal 1, a metal framework 2, a static pressure O-shaped seal ring 31, a static pressure O-shaped seal ring 32, an oil-gas source 4, a pneumatic quick joint 5 and an air cable 6.

The double-head four-lip special-shaped dynamic seal 1 comprises a left side seal 11 and a right side seal 12, wherein the lower part of the left side seal 11 is provided with a lip 111 and a lip 112, the lower part of the right side seal 12 is provided with a lip 121 and a lip 122, and therefore, the double-head four-lip special-shaped dynamic seal is provided.

The left side seal 11 and the right side seal 12 are embedded in the metal framework 2, respectively.

Static pressure 0-shaped sealing rings 31 embedded on the lips are installed above the lips 111, 112, 121 and 122, and static pressure 0-shaped sealing rings 32 embedded on the metal framework 2 are installed above the metal framework 2 and used for sealing the metal framework 2 and the inner circular surface of the support roller bearing seat end cover 81.

The utility model discloses a roll is rolling mill backing roll 7 of cold rolling mill group, and the backing roll bearing is four-row cylindrical roller bearing 8, and under the operating condition, four-row cylindrical roller bearing 8 has VG320 lubricating oil lubrication and cooling that wear-resistants, and backing roll 7 outside has the emulsion, and the emulsion plays the effect of lubricated slab band reduction rolling force in rolling. The double-end four-lip special-shaped dynamic seal 1 for oil-gas isolation sealing is arranged between the inner circular surface of the supporting roller bearing seat end cover 81 and the supporting transition distance ring 71, the lip 111, the lip 112, the lip 121 and the lip 122 are pressed on the supporting transition distance ring 71, and a closed chamber 13 is formed among the lip 112, the lip 121 and the transition distance ring 71, namely the closed chamber 13 is formed between the left side seal 11 and the right side seal 12.

The metal U-shaped framework 2 is provided with holes 21 on the circumference, and the holes 21 are connected with the closed chamber 13.

A hole 82 is drilled in a supporting roller bearing seat end cover 81, a connector 14 is screwed at the outer end of the hole 82, oil vapor with pressure is introduced into a closed chamber 13 and filled in the closed chamber 13 through a vapor source 93, a pneumatic quick connector 92, a gas cable 91, the connector 14, the hole 82, the hole 21 and the closed chamber 13 which are sequentially connected, on one hand, 5MPa pressure of the oil vapor with pressure acts on a lip 111, a lip 112, a lip 121, a lip 122 and a static pressure O-shaped sealing ring 32 to tension and isolate external media, and meanwhile, the oil vapor is lubricated and cooled, and abrasion of the lip 111, the lip 112, the lip 121 and the lip 122 of the double-end four-lip special-shaped dynamic seal 1 is reduced.

The air source 93 is an oil mist lubrication system, and may also be a combination of an air compressor and an oil mist device.

The double-end four-lip special-shaped dynamic seal 1 is made of fluororubber XD7331, and has good compactness, small friction coefficient, good wear resistance and medium leakage prevention; has proper mechanical strength and hardness, good compressibility and rebound resilience, and small permanent deformation; the tensile strength of the rubber can reach 10MPa, the elongation at break can reach 150%, the hardness can reach 70HVA, the rubber has lower brittle transition temperature and good pressure and temperature resistance, the surface roughness Ra value of a metal piece contacted with the lip of the sealing ring is 1.6Um, and the working pressure can withstand more than or equal to 40 MPa.

The lip of the double-end four-lip special-shaped dynamic seal 1 is designed into a compound lip, is very suitable for sealing two different media, has good dynamic sealing performance, and allows certain eccentric load and eccentric motion; impact pressure and vibration pressure resistance; at the same time, the strength of the lip can be increased to prevent the root of the lip from being torn. The main lip has good following performance to the shaft and is used for occasions with high linear speed and severe working conditions of the shaft. The lip and the supporting transition distance ring are designed to be 1.5mm interference magnitude, and the lip and the supporting transition distance ring are sealed by oil and gas through better elastic deformation to seal and isolate an inner cavity and an outer cavity and a medium.

The metal framework 2 is made of 1Cr18Ni9Ti material, is abrasion-resistant and U-shaped in an integrated structure, is good in strength and rigidity, is convenient for arrangement of O-shaped sealing spaces on the left side and the right side of the top, is provided with an oil-gas channel by opening the middle, is introduced into an end cover to be quickly connected with oil gas with pressure to act on the lip, and is tensioned to seal the cavity so as to isolate external emulsion and cooling water medium.

The metal framework 2 and the double-end four-lip special-shaped dynamic seal 1 are firmly attached by adopting vulcanization gluing.

The inner circular surface design of metal framework 2 and backing roll bearing frame end cover 81 is clearance fit, rely on the elastic deformation of static pressure O shape sealing washer 32 to form 0.25mm interference magnitude, seal the top, prevent that oil gas and emulsion and cooling water medium from scurrying the chamber, reach isolated different medium purpose, can effectively prevent external medium to get into four rows of cylinder roller bearing 8 and lubricating oil system, prevent that the oil emulsification is rotten, it is obvious in the aspect of 8 burnings of four rows of cylinder roller bearing and hydrovalve card hinder.

The static pressure O-shaped sealing ring 31 and the static pressure O-shaped sealing ring 23 are made of NBR butadiene acrylonitrile rubber with the specification 2.4 x 947, are used in a static pressure environment, are good in compressibility and toughness, small in oil friction resistance coefficient, good in wear resistance and not prone to leakage, the elongation at break can reach 150%, and the working pressure can be greater than or equal to 40 MPa.

The roller oil gas isolation sealed double-end four-lip special-shaped dynamic seal 1 has the advantages that the roller end side, namely the left side seal 11, is divided into the left side and the right side, the left side isolates emulsion and cooling water, the right side is connected with the pressurized closed cavity 13 filled with an oil-gas mixture in the cavity, the lip is lubricated, the oil-gas pressure of the left side and the right side acts on the lip 111 and the lip 112, the lip 111 and the lip 112 are tensioned to act on the support transition distance ring 71, the static pressure 0-shaped sealing ring 32 on the metal framework 2 seals the excircle gap, and the combination forms the sealed pressurized closed cavity 13 to isolate internal and external media. The design is designed with the exception that if the left lip 111 of the oil and gas isolation seal is damaged, the right lip 112 acts as a backup lip to isolate the seal. And assuming a more malignant condition, the left lip 111 and the right lip 112 are damaged, and at this time, the pressurized oil vapor in the closed chamber 13 seals the damaged part, so that the emulsion and the cooling water are blown away from the opposite directions.

The bearing side of sealed four lip dysmorphism dynamic seal 1 of double-end of roll oil gas isolation, also right side seal 12, divide left side and right side with the same, the left side is being full of in the cavity and is being pressed the area of the mixed body of pressure oil gas and seal chamber 13, and the isolated lubricating oil system in right side considers the exceptional circumstances equally in the design, if oil gas isolation sealed left lip 121 damages, the lip 122 on right side plays isolated effect as reserve lip. Supposing a more malignant situation, the left lip 121 and the right lip 122 are damaged, and at the moment, the sealed cavity 13 with pressure oil vapor seals the damaged part of the seal, so that the lubricating oil is blown to the opposite direction to play an isolation role.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. The utility model provides a roll oil gas isolation is sealed which characterized in that: the lower parts of the left side seal and the right side seal of the double-end four-lip special-shaped dynamic seal are respectively provided with two lips; the left side seal and the right side seal are respectively embedded in the metal framework; a static pressure 0-shaped sealing ring embedded on the lip is arranged above the lip; the double-end four-lip special-shaped dynamic seal is arranged between the inner circular surface of the end cover of the bearing seat of the supporting roll and the support transition distance ring, the lip is pressed on the support transition distance ring, and a closed chamber is formed between the left side seal and the right side seal; the static pressure 0-shaped sealing ring embedded above the metal framework is used for sealing the metal framework and the inner circular surface of the end cover of the bearing seat of the supporting roller; the steam source, the gas cable, the hole arranged on the end cover of the bearing seat of the supporting roller, the hole arranged on the U-shaped metal framework and the closed cavity are sequentially connected,

the closed cavity is filled with oil vapor under pressure.

2. The oil and gas isolation seal for a roller as claimed in claim 1, wherein: the air source is an oil mist lubrication system or a combination of an air compressor and an oil mist device.

3. The oil and gas isolation seal for a roller as claimed in claim 1, wherein: the metal framework and the double-head four-lip special-shaped dynamic seal are firmly attached by adopting vulcanization gluing.

4. The oil and gas isolation seal for a roller as claimed in claim 1, wherein: the metal framework is in clearance fit with the inner circular surface of the end cover of the bearing seat of the supporting roll, and the static pressure O-shaped sealing ring is elastically deformed and sealed.

5. The oil and gas isolation seal for a roller as claimed in claim 1, wherein: the outer end of the hole formed on the end cover of the bearing seat of the support roller is provided with a connector in a threaded manner, and the connector is connected with an air cable.

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