CN201258915Y

CN201258915Y - Hot-rolled rolling mill bearing

Info

Publication number: CN201258915Y
Application number: CNU2008200422925U
Authority: CN
Inventors: 宋晓梅; 贺健
Original assignee: ZHENJIANG FEIYA BEARING CO Ltd
Current assignee: ZHENJIANG FEIYA BEARING CO Ltd
Priority date: 2008-08-05
Filing date: 2008-08-05
Publication date: 2009-06-17
Anticipated expiration: 2018-08-05

Abstract

The utility model discloses a hot rolling mill bearing, comprising an outer ring, an inner ring, rolling bodies and a holder; two rows of rolling bodies are installed between the inner raceway of the outer ring and the outer raceway of the inner ring; the end diameter at both ends of the rolling body is smaller than the central diameter; and the axial tessellation lines at both ends of the rolling body are arched lines. The bulge amount a of the arched line at each end of the rolling body is 0.01mm to 0.03mm; the axial length of the arched line is the total length of 1/6 to 1/12 of the rolling body minus the radius of rounded angle at both ends of the rolling body; and the circular-arc radius of the arched line is R750mm to R3000mm. The hot rolling mill bearing efficiently reduces edge load weighting both ends of the rolling body and both ends of the raceway of the bearing outer ring, reduces the abrasion at both ends of the rolling body and at both ends of the raceway of the bearing outer ring, and prolongs the service life of the bearing.

Description

A kind of hot rolling mill bearing

Technical field

The utility model relates to a kind of duplex needle bearing, relates in particular to a kind of hot rolling mill bearing of working under the condition of high temperature, belongs to technical field of bearings.

Background technique

The continuous casting-rolling milling train is the metallurgical processing equipment that a kind of direct continuous rolling of ingot casting that will still be in the condition of high temperature becomes steel plate, and it has, and energy consumption is low, efficient is high, cost of production is low, high product quality advantages, has been widely used in metallurgical processing enterprise at present.Roller-mill bearing is used to support the roll two ends of hot rolling mill, and when the rolling mill roll rolled plate, ambient temperature on every side is than higher, and the working load that roller-mill bearing bore is bigger.The rolling element of existing roller-mill bearing is a cylindrical body, contacting of rolling element and bearing race is the line contact, during rolled plate, bearing roller bears very big radial load, because the influence of various factors, axial crooked generation amount of deflection takes place in rolling element, the suffered radial load maximum in rolling element two ends this moment.Because the whole discontinuity of rolling element, under long term high temperature work harsh conditions, the wearing and tearing at the two ends of roller-mill bearing rolling element and bearing outer ring ball track two ends are big, cause the damage of rolling element and bearing outer ring, reduced the working life of bearing.

The model utility content

In order to wear and tear big in the corresponding position that overcomes existing roller-mill bearing rolling element two ends and bearing outer ring ball track, fragile, the shortcoming that reduce working life, the utility model provides a kind of roller-mill bearing, this bearing can effectively reduce the wearing and tearing of rolling element two ends and bearing outer ring ball track corresponding position, prolongs the working life of bearing.

The purpose of this utility model is achieved by the following technical programs.

A kind of hot rolling mill bearing comprises outer ring, inner ring, rolling element and retainer, and the interior raceway of described outer ring is two raceways, and described pair of raceway separates by middle rib, and the two ends of described outer ring respectively are provided with a rib; Described rolling element becomes between the outer raceway of double interior raceway that is arranged on the outer ring and inner ring, and the diameter two ends diameter at described rolling element two ends is less than central diameter, and the axial plain line at these rolling element two ends is a curved line.

The purpose of this utility model can also further realize by following technical measures.

Aforesaid a kind of roller-mill bearing, the protrusion amount of each end curved line of wherein said rolling element are 0.01 millimeter～0.03 millimeter.

Aforesaid a kind of hot rolling mill bearing, the axial length of each end curved line of wherein said rolling element is: the total length of rolling element deducts 1/6～1/12 after the rolling element two terminal circle angular radius.

Aforesaid a kind of hot rolling mill bearing, the radius of arc of each end curved line of wherein said rolling element are R750～R3000 millimeter.

Rolling element of the present utility model two ends diameter is less than central diameter, and the axial plain line at rolling element two ends is a curved line; When rolling element is changed the line of production when giving birth to axial amount of deflection at the effect backspin of rotational load radially, can reduce the edge loading that bear rolling element two ends and bearing outer ring ball track corresponding position effectively, reduce the wearing and tearing of rolling element two ends and bearing outer ring ball track corresponding position, prolonged the working life of bearing.

Advantage of the present utility model and characteristics will illustrate by the non-limitative illustration of following preferred embodiment and explain that these embodiments only provide as an example with reference to accompanying drawing.

Description of drawings

Fig. 1 is a sectional view of the present utility model;

Fig. 2 is the A portion enlarged view of Fig. 1.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

As shown in Figure 1, the utility model comprises outer ring 1, inner ring 2, rolling element 3 and retainer 4; The interior raceway of outer ring 1 is two raceways 11, middle rib 12 separates two raceways 11, the two ends of outer ring 1 respectively are provided with a

rib

13,3 one-tenth of rolling elements are double to be arranged between the outer raceway of the interior raceway of outer ring 1 and inner ring 2, the restriction that axially is subjected to rib 13 and middle rib 12 of rolling element 3, the end face diameter at the two ends of rolling element 3 is less than central diameter, and the axial plain line at rolling element 3 two ends is a curved line 31.

As shown in Figure 2, the protrusion amount a of the curved line 31 of rolling element 3 each end is 0.01 millimeter～0.03 millimeter.The axial length b of this curved line 31 is: the total length of rolling element 3 deducts 1/6～1/12 behind the rolling element two terminal circle angular radius r.The radius of arc R of this curved line is R750～R3000 millimeter.

When rolling element 3 is subjected to bigger radial load and produces axial amount of deflection in rotary course, because the end face diameter at rolling element 3 two ends is less than central diameter, the arc shaft at two ends has reduced the suffered edge loading in rolling element 3 two ends and bearing outer ring 1 raceway two ends effectively to plain line, reduce the damage of bearings that causes because of rolling element 3 two ends and bearing outer ring 1 raceway two ends serious wear, prolonged the working life of bearing.

In addition to the implementation, the utility model is not limited to the roller-mill bearing of two raceways, and the technological scheme that it is curved line that axial plain line is processed at all two ends with rolling element all drops in the protection domain of the utility model requirement.

Claims

1. a hot rolling mill bearing comprises outer ring (1), inner ring (2), rolling element (3) and retainer (4); The interior raceway of described outer ring (1) is two raceways (11), and described pair of raceway (11) separates by middle rib (12), and the two ends of described outer ring (1) respectively are provided with a rib (13); Described rolling element (3) becomes between the outer raceway of double two raceways (11) that are arranged on outer ring (1) and inner ring (2), it is characterized in that the diameter at described rolling element (3) two ends is less than central diameter, and the axial plain line at these rolling element two ends is curved line (31).

2. a kind of hot rolling mill bearing according to claim 1 is characterized in that, the protrusion amount of each end curved line (31) of described rolling element (3) is 0.01 millimeter～0.03 millimeter.

3. a kind of hot rolling mill bearing according to claim 1 is characterized in that, the axial length of each end curved line (31) of described rolling element (3) is: the total length of rolling element deducts 1/6～1/12 after the rolling element two terminal circle angular radius.

4. a kind of hot rolling mill bearing according to claim 1 is characterized in that, the radius of arc of each end curved line (31) of described rolling element (3) is R750～R3000 millimeter.