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PRS Bearing

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Slewing bearing

洛阳普瑞森精密轴承有限公司LUOYANG PRECISION BEARING CO.,LTD

转盘轴承的结构形式

The structural style of slewing ring

转盘轴承是一种能够同时承受较大的轴向负荷、径向负荷和倾覆力矩等综合载荷的特殊结构的大型轴承。一般情况下，转盘轴承自身均带有安装孔、润滑油孔和密封装置，可以满足各种不同工况条件下工作的各类主机的不同需求；另一方面，转盘本身具有结构紧凑、引导旋转方便、安装简便和维护容易等特点，被广泛用于起重运输机械、港口机械、采掘机械、建筑工程机械和导弹发射架等大型回转装置上。

Slewing Ring is a large-sized bearing with special structure which can sustain the compresive heavy loadings, like radial loading, axial loading and tangible moment. In the most cases, because of its mounting holes, grease holes and sealing device, they can fullfill the different requirements of any main frame in all kinds of working conditions. In other hands, slewing bearing which have the characteristic of cramped construction,, convenient rotary guide, handy installation and easy maintain are widely used in elevating machinery, harbor machinery, mining machinery, constructional engineering machinery, missile launcher and other large-sized rotators。

转盘轴承根据不同的结构型式可以分为四点接触球转盘轴承、双排角接触推力球转盘轴承、交叉圆柱滚子轴承、交叉圆锥滚子轴承和三排圆柱滚子组合转盘轴承等不同的结构型式；上述各类轴承按其是否带齿及齿轮的分布部位又分为无齿式、外齿式或内齿式等不同结构。

The slewing bearing can be divided into four-point conatct ball slewing ring, double-row angular thrust ball slewing bearing, crossed cylindrical roller slewing bearing, crossed tapered roller slewing bearing and three-row cylindrical combined roller slewing bearing according to their different structural styles. According to the with or withour gear and the distrubition of gear, slewing bearing can be divided into without gear, external gear and internal gear。

PRS转盘轴承根据不同的特点可分别满足各种不同负荷条件下工作主机的需求。其中，四点接触球转盘轴承具有较高的动负荷能力，交叉圆柱滚子转盘轴承具有较高的静负荷能力，交叉圆锥滚子转盘轴承其预过盈能使轴承具有较大的支撑刚性和较高的回转精度，三排圆柱滚子组合转盘轴承由于把承载能力的提高引向轴承的高度方向，各种载荷又分别由不同滚道和滚子组承受，所以在同等受力条件下，因而具有使主机更为紧凑的特点，是一种高承载能力的转盘轴承。

PRS Slewing Ring can fullfill the requirements of all kinds loading conditions of working main frames according to the different features。Morever, the four-point contact ball slewing bearing has relatively higher dynamic capacity. The crossed cylindrical roller slewing ring has relatively higher static capacity. The crossed tapered roller slewing bearing have heavier rigidity and higher running accuracy because of its pre-interference. Three-double cylindrical roller combined slewing bearing can be lead to the height direction because of its rise of loading capacity。Each kind of load sustains by different raceways and roller elements。Therefore, in the same stress, it can make the main frame more compact。

转盘轴承的代号表示法

Code representation of slewing bearing

转盘轴承采用的表示方法，是由分别表示滚动体类别、滚道结构形式和齿轮啮合方式，滚动体直径，滚动体中心圆直径及材料与毛坯型式等内容的全数字式综合表示法：

The code representation of slewing bearing is a kind of all-digital compressive representation which consists of rolling element, structural style, gearing mesh, gear engagement system, rolling element center circle diameter , material and blank pattern。

此该方法表示的转盘轴承代号，用阿拉伯数字分四段表示，每段之间用“．”予以分开，各段数字代表的具体含义为：

The slewing ring code is represented in four-section with Arabic figures. And it is divided in dots. The concrete sense is represented as follows：

X X X ．XX ．XXXX ．XX

材料及毛坯供应状态

滚动体中心圆直径(mm) rolling element center circle diameter

滚动体直径(mm) rolling element diameter

齿轮啮合型式gear engagement system

0－无齿式without gear ；１－外齿较小模数external gear with small module；

2－外齿较大模数external gear with big module；

3－内齿较小模数internal gear with small module；

４－内齿较大模数internal gear with big module

滚道结构型式rolling element structural style

1－四点接触球式或交叉圆柱滚子式four-point angular contact ball or crossed

cylindrical roller

2－双排角接触球推力球式或交叉圆锥滚子式double-row angular contact

thrust ball or crossed tapered rollers

3－三排圆柱滚子组合式three-row combined cylindrical roller

滚动体类型rolling type 0－球式ball 1－滚子式roller 套圈材料及毛坯供应状态的代号按表1的规定,表中“T”表示套圈毛坯为调质状态供应，“Z”则表示套圈毛坯以正火状态供应。

The code of material and blank supply states of bearing ring is stipulated according to talbe 2. The “T”stads for the hardening and tempering supply states of bearing ring. The “Z” stands for the blank normalized condition of bearing ring。