Rolling mill belt winder wheel structure

Abstract

The utility model discloses a kind of roller mill belt coiler wheel structure, including wheel shaft and wheel, the end of wheel shaft is designed with two sets of single-row tapered roller bearings, two sets of single-row tapered roller bearings are installed in wheel and wheel shaft using back-to-back combination form, wheel shaft end portion is equipped with end cover for bearing axial positioning, wheel overall is pressed on track support surface;The inner ring center of the wheel is designed with shoulder ring, shoulder ring is between the outer ring of two single-row tapered roller bearings when installing bearing, for the positioning of the outer ring of two single-row tapered roller bearings.Single-row tapered roller bearing is used as standard part, investment is small, easy to purchase;Bearing uses grease lubrication, and is designed with oil filler, easy to maintain;Rolling bearing form is used, and carrying capacity is large, friction resistance is small, rotates flexibly, and belt coiler moving resistance is very small.

Description

Technical Field

[0001] This utility model belongs to the field of wheel structure technology, specifically relating to a wheel structure for a rolling mill belt winding aid. Background Technology

[0002] The belt winding aid in a stainless steel cold-rolling DMS20 rolling mill is used to assist in winding the strip steel onto the winding mandrel. The belt tension presses the strip steel against the mandrel. After the strip steel enters between the belt and the mandrel, the mandrel rotates, winding the strip steel onto the mandrel and generating the required tension for production. The belt winding aid is moved using a traversing hydraulic cylinder. Supported by wheels, the belt winding aid moves back and forth along a fixed track, with its weight entirely borne by the four wheels. A bushing, made of non-metallic material, is embedded between the wheel and the axle, providing some self-lubricating properties. However, under the 9.8-ton weight of the belt winding aid, the relative sliding friction between the bushing and the wheel axle is relatively large, leading to wear. Due to the weight difference borne by the front and rear wheels, the bushing wear varies, with the front wheel bushing experiencing greater wear. This can cause the rear of the belt winding aid to lift, potentially causing the belt winding aid's retaining roller to collide with the mandrel, resulting in overall damage to the belt winding aid and an equipment accident. The troubleshooting time was approximately 12 hours, which severely affected the stable production operation of the DMS20 rolling mill. Utility Model Content

[0003] This utility model provides a wheel structure for a belt winding aid in a rolling mill, offering an effective and optimized wheel-wheel axle fit to address the technical problem at hand.

[0004] Therefore, the present invention adopts the following technical solution:

[0005] A roller mill belt winding aid wheel structure includes a track, a wheel axle, and a wheel. One end of the wheel axle is designed with two sets of single-row tapered roller bearings. The two sets of single-row tapered roller bearings are installed on the wheel and wheel axle in a back-to-back combination. An end cap for axial positioning of the bearings is installed at the end of the wheel axle. The wheel as a whole presses against the track support surface.

[0006] The inner rim of the wheel is designed with a shoulder ring. When the bearing is installed, the shoulder ring is located between the outer rings of the two single-row tapered roller bearings and is used for positioning the outer rings of the two single-row tapered roller bearings.

[0007] The beneficial effects of this utility model are as follows:

[0008] Using single-row tapered roller bearings as standard components results in low investment and easy procurement. The bearings are grease-lubricated and equipped with grease fittings for easy maintenance. The use of rolling bearings provides high load-bearing capacity, low frictional resistance, and flexible rotation, minimizing the movement resistance of the belt-driven winding device. This effectively eliminates wear issues between the wheel axle sleeve and the wheel axle, thus preventing equipment failures, improving equipment stability, and ensuring smooth operation of the rolling mill. Attached Figure Description

[0009] Figure 1 It is the original, unmodified wheel structure;

[0010] Figure 2 This is the improved wheel structure described in this application;

[0011] In the diagram: 1-wheel axle, 2-wheel, 3-axle sleeve, 4-shoulder ring, 5-single-row tapered roller bearing. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0013] Figure 1 The original wheel design used an interference fit between the wheel axle and the belt winch frame, making disassembly and replacement difficult after the wheel axle wore out. The non-metallic bushings used were imported spare parts, which were expensive and had long procurement cycles. Under heavy loads, the bushings had poor wear resistance and were prone to wear and damage, leading to severe wear on the wheel and wheel axle.

[0014] 1. The sliding friction of the bushing is changed to the rolling friction of the bearing, resulting in lower frictional resistance and less wear.

[0015] 2. Without changing the external structure of the wheels, it can be perfectly matched with the existing track.

[0016] 3. The wheel and wheel axle structure is simple in design and easy to process.

[0017] 4. Each wheel is equipped with two sets of tapered roller bearings, which have a large load-bearing capacity and a long service life.

[0018] Figure 2 This application discloses a wheel structure for a belt winding aid in a rolling mill, comprising a track, a wheel axle 1, and a wheel 2. One end of the wheel axle 1 is designed with two sets of single-row tapered roller bearings 5. The wheel axle 1 is mounted on the wheel 2 and the wheel axle 1 in a back-to-back combination via the two sets of single-row tapered roller bearings 5. An end cap for axial positioning of the bearings is installed at the head end of the wheel axle 1. The wheel 2 is pressed against the track support surface as a whole. A shoulder ring 4 is designed at the center of the inner ring of the wheel 2. When the bearings are installed, the shoulder ring 4 is positioned between the outer rings of the two single-row tapered roller bearings 5 ​​for positioning the outer rings of the two single-row tapered roller bearings 5.

[0019] Figure 2 This is a comparison of the improved wheel and axle assembly drawing with the original wheel assembly drawing. The improved wheel axle 1 uses a clearance fit with the frame for easy assembly and disassembly, and the end is designed with fixing bolts to firmly fix the wheel axle 1. Each wheel 2 is equipped with two sets of single-row tapered roller bearings 5 ​​(32212), which have a large load-bearing capacity. The outer end cover of the wheel 2 presses against the inner ring of the bearing, and the end cover is fixed with two 8.8 grade M16 bolts, so the bearing will not move axially.

[0020] Note: The basic rated dynamic load of the single-row tapered roller bearing 32212 is 132 kN, approximately 13 tons, and the basic rated static load is 180 kN, approximately 18 tons. The theoretical maximum tensile force of an 8.8 grade M16 bolt is approximately 17.3 tons; to ensure safety, 70% of the maximum load is typically taken, approximately 12 tons. Therefore, the wheel design meets the load-bearing capacity requirements.

Claims

1. A roll down belt coiler wheel structure, characterized by, Includes wheel axle and wheel. One end of the wheel axle is designed with two sets of single-row tapered roller bearings. The two sets of single-row tapered roller bearings are installed on the wheel and wheel axle in a back-to-back combination. The end cap for axial positioning of the bearing is installed at the end of the wheel axle. The wheel as a whole is pressed against the track support surface. The inner rim of the wheel is designed with a shoulder ring. When the bearing is installed, the shoulder ring is located between the outer rings of the two single-row tapered roller bearings and is used for positioning the outer rings of the two single-row tapered roller bearings.

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