CN203362815U - A special bearing for cold-rolled sheet backup rolls - Google Patents

Abstract

A special bearing for a cold-rolled sheet supporting roller is mainly composed of two outer rings, two inner rings, a middle spacing ring, two outer check rings, four groups of rolling bodies and four retainers. The middle parts of the two outer rings and the middle spacer ring are respectively provided with an annular oil groove and a plurality of oil injection holes distributed at equal intervals, and each oil injection hole is internally provided with an oil nozzle; a first annular groove is formed in the side wall of the upper part of the oil nozzle, and a first O-shaped sealing ring is arranged in the first annular groove; second ring grooves are respectively formed in the two sides of the annular oil groove on the outer ring, and second O-shaped sealing rings are arranged in the second ring grooves; one end of each strut of the retainer is provided with a first retainer gasket, the other end of each strut is provided with a second retainer gasket, and the first retainer gasket and the second retainer gasket are respectively welded and connected with the struts; the installation and the disassembly are convenient, the rotating speed capability is high, the reliability is good, the service life is long, and the social and economic benefits are obvious.

Description

A special bearing for cold-rolled sheet backup rolls

technical field

The utility model relates to a bearing, in particular to a high-precision, high-reliability special bearing for cold-rolled thin plate backup rolls.

Background technique

At present, the bearings installed on the high-precision and high-reliability cold-rolled sheet support rolls are mostly imported bearings, which are expensive and have many shortcomings. For example, the bearing bracket and the cage washer are welded at one end and threaded at the other end. This connection method is easy to open and weld during use. However, the lubricating oil flow in the lubrication system is insufficient, and the bearing is easy to heat up, which affects the reliability of the bearing. In addition, the end face of the outer ring of the bearing and the end face of the inner ring are prone to cracks due to relative friction.

Utility model content

The purpose of this utility model is to provide a special bearing for cold-rolled sheet backup rolls, which has good lubricating performance, high safety performance and long service life.

The technical solutions adopted are:

A special bearing for cold-rolled sheet backup rolls, which is mainly assembled from two outer rings, two inner rings, two outer retaining rings, a spacer ring, four sets of rolling elements and four cages, is a known technology. It is characterized by:

There are annular oil grooves and multiple oil injection holes in the middle of the two outer rings and the middle spacer ring respectively. An oil nozzle is installed in each oil injection hole. The shape and size of the oil nozzles are suitable for the oil injection holes. An O-ring is installed in the groove. The oil nozzle is made of ZCuZn40Pb2 brass, and the O-ring is a nitrile rubber O-ring. There is an oil nozzle in the oil injection hole of the outer ring of the bearing, which can effectively ensure the lubricating oil pressure, make the inside of the bearing fully and evenly lubricated, reduce the temperature rise of the bearing, improve the reliability of the bearing, and save lubricating oil at the same time.

The cage washers installed at both ends of each pillar of the cage are respectively welded and connected with the corresponding cage pillars. (The pillar of the known bearing and the cage washer are welded at one end and threaded at the other end). Avoid the problem of easy welding of the pillar under large rolling force and large impact force, and ensure the reliability and service life of the bearing.

The welding socket between the cage washer and the pillar is an arc socket (formerly a conical socket), which increases the effective contact area of welding, improves the welding strength, and ensures the reliability and service life of the bearing.

The two sides of the annular oil groove for lubricating the outer ring are respectively provided with sealing ring grooves, and a nitrile rubber O-ring is installed in the sealing ring grooves. There are O-rings on both sides of the annular oil groove for lubricating the outer ring of the bearing, which not only ensures the lubricating oil pressure of the bearing, but also ensures the lubricating flow, and at the same time prevents impurities from entering the bearing raceway with the lubricating oil, improving the reliability of the bearing and saving lubricating oil at the same time .

The utility model is easy to manufacture, low in cost, high in production efficiency, economical and environmentally friendly, and meets the needs of low-carbon economic development; it is convenient to install and disassemble, high in rotating speed, good in reliability, long in service life, and has remarkable social and economic benefits.

The utility model is a FCDP138196750/HCC9YA6/P5 bearing, the outer dimensions of which are φ690X, φ980X750, belonging to four-row cylindrical roller bearings.

The utility model has the following advantages:

①The bearing strut and the cage washer are welded at both ends (originally, one end is welded and the other end is threaded), which avoids the problem of easy welding of the strut under large rolling force and impact force, and ensures the reliability and service life of the bearing.

②The welding dimple between the cage washer and the pillar is an arc dimple (formerly a conical dimple), which increases the effective contact area of welding, improves the welding strength, and ensures the reliability and service life of the bearing.

③There are O-rings on both sides of the lubricating groove of the outer ring of the bearing, which not only ensures the lubricating oil pressure of the bearing, but also ensures the lubricating flow, and at the same time prevents impurities from entering the bearing raceway with the lubricating oil, improving the reliability of the bearing and saving lubricating oil and Environmental friendly.

④ There is an oil nipple assembly in the lubricating hole of the outer ring of the bearing, which can effectively ensure the lubricating oil pressure, so that the inside of the bearing can be fully and evenly lubricated, reduce the temperature rise of the bearing, improve the reliability of the bearing, and at the same time save lubricating oil and protect the environment.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Figure 2 is a schematic diagram of the oil seal structure.

Detailed ways

A special bearing for cold-rolled sheet backup rolls, mainly composed of two outer rings 1, two inner rings 2, intermediate spacer rings 3, two outer retaining rings 4, four sets of rolling elements 5 and four cages 6, It is characterized by:

The middle parts of the two outer rings 1 and the middle spacer ring 3 are respectively provided with an annular oil groove 7 for lubrication and 8 oil injection holes 9 arranged equidistantly, each oil injection hole 9 is provided with an oil nipple 10 . The oil nozzle 10 is made of ZCuZn40Pb2 brass. There is a first ring groove on the upper side wall of the oil nozzle 10. A first O-ring 8 is installed in the first ring groove. The first O-ring 8 is a nitrile rubber O-shaped sealing ring.

On the outer ring 1 , there are second ring grooves 11 arranged on both sides of the annular oil groove 7 , and a second O-ring 12 is installed in the second ring grooves 11 . The second O-ring is a nitrile rubber O-ring.

One end of each pillar 15 of the cage 6 is equipped with a first cage washer 13, and the other end is equipped with a second cage washer 14, and the first cage washer 13 and the second cage washer 14 are welded to the pillar 15 respectively. Solid connection, and the welding socket is an arc socket.

Two outer rings 1 and two inner rings 2 have lubricating grooves on their end faces.

In the utility model, two outer rings 1, two inner rings 2, and four sets of rolling elements 5 are made of G20Cr2Ni4A carburizing steel, the cage gasket is made of 20 ^# steel, and the outer retaining ring and the middle retaining ring are made of GCr15SIMn bearings Made of steel.

Claims (1)

1. a flat cold-rolled sheet support roll special bearing, mainly by two outer rings (1), two inner rings (2), in spacer ring (3), two outer back-up rings (4), four groups of rolling elements (5) and four retainers (6) be assembled into, it is characterized in that:

The middle part of two outer rings (1) and middle spacer ring (3) offers respectively a plurality of oil holes (9) of annular oil groove (7) and equidistant laying, is equiped with oil nozzle (10) in each oil hole (9); On the upper portion side wall of oil nozzle (10), the first annular groove is arranged, the in-built O RunddichtringO (8) that is provided with of the first annular groove;

Outer ring (1) is upper, and the both sides that are positioned at annular oil groove (7) offer respectively the second annular groove (11), are equiped with the 2nd O RunddichtringO (12) in the second annular groove (11); One end of each pillar (15) of retainer (6) is equiped with the first retainer packing ring (13), the other end is equiped with the second retainer packing ring (14), the first retainer packing ring (13), the second retainer packing ring (14) are connected with pillar (15) solid welding respectively, and the welding nest is the circular arc nest.

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