GB/T 21559.1:2023 Rolling bearings - Linear motion rolling bearings - Part 1: Dynamic load ratings and rating life
1 Scope
This document specifies methods of calculating the basic dynamic load rating and basic rating life for linear motion rolling bearings as well as the method of calculating life of linear motion rolling bearings and the conditions required for reliable life calculations.
This document is applicable to linear motion rolling bearings manufactured from contemporary, commonly used, high quality, hardened bearing steel in accordance with good manufacturing practice and basically of conventional design as regards the shape of the rolling contact surfaces.
This document is not applicable to designs where the rolling elements operate directly on the slide surface of the machine equipment, unless that surface is equivalent in all respects to the raceway of the linear motion rolling bearing component it replaces.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 281 Rolling bearings - Dynamic load ratings and rating life
Note: GB/T 6391-2010 Rolling bearings - Dynamic load ratings and rating life (ISO 281:2007, IDT)
ISO 5593 Rolling bearings - Vocabulary
Note: GB/T 6930-2002 Rolling bearings - Vocabulary (ISO 5593:1997, IDT)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 281 and ISO 5593, and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
——ISO Online browsing platform: https://www.iso.org/obp;
——IEC Electropedia: available at: http://www.electropedia.org/.
3.1
recirculating linear ball bearing, sleeve type, with or without raceway grooves
basically cylindrical sleeve provided with a number of closed loops of recirculating balls designed to achieve linear rolling motion along a hardened cylindrical shaft
Note 1: See Figure 1.
Note 2: The raceways in the sleeve can be designed cylindrical as well as steel inserts with raceway grooves parallel to the axis.
Figure 1 Recirculating linear ball bearing, sleeve type
3.2
recirculating linear ball (or roller) bearing, linear guideway, carriage type
linear ball (or roller) bearing provided with a number of symmetrically arranged, closed loops of recirculating balls (or rollers) designed to achieve linear rolling motion along a hardened guideway furnished with adequate raceways
Note: See Figure 2.
Foreword I
Introduction II
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Basic dynamic load ratings
6 Dynamic equivalent load
7 Basic rating life
Bibliography
GB/T 21559.1-2023 滚动轴承 直线运动滚动支承 第1部分：额定动载荷和额定寿命
1 范围
本文件规定了直线运动滚动支承基本额定动载荷和基本额定寿命的计算方法，以及直线运动滚动支承寿命的计算方法和可靠的寿命计算所需的条件。
本文件适用于采用现代常用、高质量淬硬轴承钢，按良好加工方法制造，且滚动接触表面的形状基本上为常规设计的直线运动滚动支承。
本文件不适用于滚动体直接在机械设备的光滑表面上运转的设计，除非该表面在各方面与其所代替的直线运动滚动支承零部件的滚道相当。
2 规范性引用文件
下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引用文件，仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本(包括所有的修改单)适用于本文件。
ISO 281 滚动轴承 额定动载荷和额定寿命(Rolling bearings—dynamic load ratings and rating life)
注：GB/T 6391—2010 滚动轴承 额定动载荷和额定寿命(ISO 281：2007， IDT)
ISO 5593 滚动轴承 词汇(Rolling bearings—Vocabulary)
注：GB/T 6930—2002 滚动轴承 词汇(ISO 5593：1997， IDT)
3 术语和定义
ISO 281和ISO 5593界定的以及下列术语和定义适用于本文件。
ISO和IEC维护的标准化工作中使用的术语数据库网址如下：
——ISO在线浏览平台：https：//www.iso.org/obp；
——IEC电工百科：http：//www.electropedia.org/。
3.1
有或无沟道套筒型循环球直线轴承 recirculating linear ball bearing， sleeve type， with or without raceway grooves
为实现沿淬硬圆柱形轴作直线滚动运动而设计的具有若干循环球封闭滚道的基本圆柱形套筒。
注1：见图1。
注2：套筒上的滚道能被设计为圆柱形或具有平行于轴线的沟道的钢制嵌块。
图1 套筒型循环球直线轴承
3.2
滑块型循环球(或滚子)直线导轨支承 recirculating linear ball (or roller) bearing， linear guideway， carriage type
为实现沿设有相应滚道的淬硬导轨作直线滚动运动而设计的具有若干循环球(或滚子)的对称、封闭滚道的直线球(或滚子)支承。
注：见图2。
图2 滑块型循环球(或滚子)直线导轨支承
3.3
深沟型非循环球直线导轨支承 non-recirculating linear ball bearing， linear guideway， deep groove type
用球作滚动体，每个球有两个接触点的直线支承。
注1：见图3。
注2：两导轨的沟道截面半径相等，且在0.52Dw～＋∞之间。
图3 深沟型非循环球直线导轨支承
3.4
四点接触型非循环球直线导轨支承 non-recirculating linear ball bearing， linear guideway， four-point-contact type
用球作滚动体，每个球有四个接触点的直线支承。
注1：见图4。
注2：两导轨上四个接触点的沟道截面半径相等，且在0.52Dw～＋∞之间。
图4 四点接触型非循环球直线导轨支承
3.5
平型非循环滚子直线导轨支承 non-recirculating linear roller bearing， linear guideway， flat type
用滚针或圆柱滚子作滚动体的直线支承。
注：见图5。
图5 平型非循环滚子直线导轨支承
3.6
V型非循环滚子直线导轨支承 non-recirculating linear roller bearing， linear guideway， V-angle type
导轨为90°V型构件的直线支承。
注1：见图6。
注2：常用滚针或圆柱滚子作滚动体。
图6 V型非循环滚子直线导轨支承
3.7
交叉滚子型非循环滚子直线导轨支承 non-recirculating linear roller bearing， linear guideway， crossed roller type
圆柱滚子交叉排设的直线支承。
注：见图7。
