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The Bearing of Back Roll for Belt Conveyor Idlers — Basic Parameters and Dimensions
1 Scope
This standard specifies the term and definition, representation methods of type, structure type, basic parameters and dimensions, and technical requirements of the bearing of back roll for belt conveyor idlers (hereinafter referred to as bearing housing).
This standard is applicable to the parameters and dimensions of idler specified in GB/T 990-1991.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 699-1999 Quality Carbon Structural Steels
GB/T 708-1988 Dimension, Shape, Weight and Tolerance for Cold-rolled Steel Plates and Sheets
GB/T 709-1988 Dimension, Shape, Weight and Tolerance for Hot-rolled Steel Plates and Sheets
GB/T 990-1991 Belt Conveyor Idlers — Basic Parameters and Dimensions
GB/T 13237-1991 Cold-rolled Quality Carbon Structural Steel Sheets and Strips
GB/T 15055-1994 Permissible Stamping Variations in Dimensions without Tolerance Indication
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
idler
a device for supporting the conveyor belt and the materials on the conveyor belt to ensure the stable operation of the conveyor belt
3.2
bearing housing
parts for supporting bearings and the like are formed by cold stamping. Types are TD75, DTII, TK, TKII and SP
4 Representation Methods of Type
4.1 Representation methods of type for bearing housing are as follows:
Idler diameter
Bearing model
Idler model
4.2 Designation example
Bearing housing of the idler type is DTII, the bearing type is 4G204, and the idler diameter is φ89, designated as DTII204-89.
5 Structure Type, Basic Parameters and Dimensions
5.1 Structure type
a. Type TD75 bearing housing as shown in Figure 1;
b. Type DTII bearing housing as shown in Figures 2 and 3;
c. Type TK bearing housing as shown in Figure 4;
d. Type TKII bearing housing as shown in Figure 5;
e. Type SP bearing housing as shown in Figure 6.
5.2 Basic parameters and dimensions
The basic parameters and dimensions shall comply with the requirements specified in Tables 1 to 5.
6 Technical Requirements
6.1 The chemical composition of materials selected for the product shall comply with the requirements of GB/T 699-1999. The recommended materials are: 08Al, 08F, SPHE, etc.
6.2 The physical and mechanical properties of the materials shall comply with the requirements of GB/T 13237-1991.
6.3 The dimension, shape, weight and tolerance of materials selected for the product shall comply with the requirements of GB/T 708-1988 and GB/T 709-1988.
6.4 According to the requirements of GB/T 15055-1994, the dimensions in the drawing without tolerance indication shall be manufactured according to the accuracy of Class f.
6.5 There shall be no defects, such as burrs, cracks, dents and wrinkles on the product surface.
6.6 D1 and bearing contact surface, the radial contact surface and the axial contact surface shall not less than 80%.
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Representation Methods of Type
5 Structure Type, Basic Parameters and Dimensions
6 Technical Requirements
中國重型機械聯合企業標準
JB/ZQ 6201-2003
帶式輸送機托輥沖壓軸承座
基本參數與尺寸
The Bearing of Back Roll for Belt conveyor idlers—
Basic parameters and dimensions
2003-12-01 發布 2004-01-01 實施
中國重型機械工業協會 發 布
前 言
本標準由中國重型機械工業協會歸口管理。
帶式輸送機托輥沖壓軸承座
基本參數與尺寸
1 范圍
本標準規定了帶式輸送機托輥沖壓軸承座（以下簡稱軸承座）產品的術語和定義、型號表示方法、結構型式、基本參數與尺寸、技術要求。
本標準適用于GB/T 990－1991所列的托輥參數與尺寸。
2 規范性引用文件
下列文件中的條款通過本標準的引用而成為本標準的條款。凡是注日期的引用文件，其隨后所有的修改單（不包括勘誤的內容）或修訂版均不適用于本標準，然而，鼓勵根據本標準達成協議的各方研究是否可使用這些文件的最新版本。凡是不注日期的引用文件，其最新版本適用于本標準。
GB/T 699－1999 優質碳素鋼的化學成分和力學性能
GB/T 708－1988 冷軋鋼板和鋼帶的尺寸、外形、重量及允許偏差
GB/T 709－1988 熱軋鋼板和鋼帶的尺寸、外形、重量及允許偏差
GB/T 990－1991 帶式輸送機 托輥 基本參數與尺寸
GB/T 13237－1991 優質碳素結構鋼冷軋薄鋼板和鋼帶
GB/T 15055－1994 沖壓件未注公差尺寸極限偏差
3 術語和定義
下列術語和定義適用于本標準。
3.1
托輥
用于支承輸送帶及輸送帶上的物料，保證輸送帶穩定運行的裝置。
3.2
沖壓軸承座
采用冷沖壓成型的用于支承軸承等的零件。型式有TD75型、DTⅡ型、TK型、TKⅡ型和SP型。
4 型號表示方法
4.1 軸承座型號表示方式如下
托輥直徑
軸承型號
托輥型號
4.2 標記示例
托輥型號為DTⅡ型，所裝軸承型號為4G204，所裝托輥直徑為φ89的軸承座，型號表示為DTⅡ204-89。
5 結構型式、基本參數與尺寸
5.1 結構型式
a. TD75型軸承座見圖1；
b. DTⅡ軸承座見圖2～圖3；
c. TK型軸承座見圖4；
d. TKⅡ型軸承座見圖5；
e. SP型軸承座見圖6。
5.2 基本參數與尺寸
基本參數與尺寸符合表1～表5 。
6 技術要求
6.1 產品所選材料的化學成分應符合GB/T 699-1999要求，建議采用材料為：08Al、08F、SPHE等。
6.2 材料的物理機械性能應符合GB/T 13237-1991要求。
6.3 產品所選材料的尺寸、外形、重量及允許偏差應符合GB/T 708-1988、GB/T 709-1988要求。
6.4 圖樣中未注公差的尺寸，按GB/T 15055－1994的規定，其公差等級按f級精度制造。
6.5 產品表面不允許有毛刺、裂紋、凹痕、皺紋等缺陷。
6.6 D1與軸承接觸面，徑向接觸面和軸向接觸面均不小于80%。
圖1 TD75型軸承座
注：注： 為基準符號，以下同。
表1 TD75型軸承座基本參數與尺寸
單位為mm
型號 規格 D D1 D2 d H H1 H2 H3 C t
圖2 D≤φ108以下DTⅡ型軸承座
圖3 D≥φ133以上DTⅡ型軸承座
?
表2 DTⅡ型軸承座基本參數與尺寸
單位為mm
型號 規格 D D1 D2 D3 d H H1 H2 R r C t
圖4 TK型軸承座
表3 TK型軸承座基本參數與尺寸
單位為mm
型號 規格 D D1 D2 d H H1 H2 R r C t
圖5 TKⅡ型軸承座
?
表4 TKⅡ型軸承座基本參數與尺寸
單位為mm
型號 規格 D D1 D2 d H H2 R r C t
圖6 SP型軸承座
表5 SP型軸承座基本參數與尺寸
單位為mm
型號 規格 D D1 D2 D3 d H H1 H2 H3 r R C T1 T2
