GB/T 13575.2-2022Classical and narrow V-belt drives - Part 2: Effective system (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part

1.Structure and Drafting Rules for Standardization Documents" drafting. This document is Part 2 of GB/T 13575 "Normal and Narrow V-Belt Drives". GB/T 13575 has issued the following parts.

1.Datum width system;

2.Effective width system. This document replaces GB/T 13575.2-2008 "Ordinary and Narrow V-Belt Drives Part

2.Effective Width System", and GB/T 13575.2- Compared with.2008, except for structural adjustment and editorial changes, the main technical changes are as follows:

---Changed some symbols. top width b is changed to W, height h is changed to T, wheel groove width be is changed to We, effective line difference Deltae is changed to be, The groove angle psi is changed to alpha, the wrap angle alpha is changed to theta, the wrap angle coefficient Kalpha is changed to Ktheta, and the center distance a is changed to C (see Figure 1, Figure 2, Figure 3,

6.8 and Table 14, Figure 1, Figure 2, Figure 3,

5.5 and Table 9 of the.2008 edition);

--- Deleted the wedge angle with the basic dimensions of the section (see Figure 1 and Table 1 of the.2008 edition);

--- Added trimmed V-belt and pulley models (see Table 1 to Table 6);

---Deleted the number of joint groups (see Figure 2 and Table 2 of the.2008 edition);

--- Added limit deviation and matching difference with effective length (see Table 3);

--- Deleted the geometric tolerance mark of the wheel groove section (see Figure 3 of the.2008 edition);

--- Changed the size of the effective diameter series (see Table 5, Table 5 of the.2008 edition);

1 Scope

GB/T 13575.2-2022 is the Chinese national standard on classical and narrow v-belt drives - part 2: effective system, in the field of mechanical systems and components. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 30 December 2022 by the State Administration for Market Regulation; Standardization Administration of China, and has been in force since 1 July 2023. Classification: ICS 21.220.10, CCS J18. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 6931.1 Terminology of belt drives Part

GB/T 6931.2 Terminology of belt drives Part 2: V-belt and V-belt drives

GB/T 10413 narrow V-belt pulley (effective width system)

GB/T 15531 Adjustment limit value of belt drive pulley center distance

3 Terms and Definitions

The terms and definitions defined in GB/T 6931.1 and GB/T 6931.2 apply to this document.

4 Belts

4.1 Strip dimensions See Figure 1 and Table 1 for the basic dimensions of the cross-section of a single narrow V-belt. See Figure 2 and Table 2 for the basic dimensions of the combined narrow V-belt section. Explanation of indexing symbols. W

--- top width, in millimeters (mm); T

--- height, in millimeters (mm). Figure