GB/T 43617.2-2024Rolling bearings - Noise testing of rolling bearing greases - Part 2: Test and evaluation method BQ+ (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 43617 "Rolling bearings - Test for noise from rolling bearing greases". GB/T 43617 has been published.

The following parts are published.

--- Part 1: Basic principles, test components and testers;

--- Part 2: Test and evaluation methods BQ.

This document is equivalent to ISO 21250-2:2020 "Rolling bearings - Tests for noise from rolling bearing greases - Part 2: Tests and evaluation Method BQ.

Introduction

Rolling bearing life theory emphasizes that the use of clean and uniform lubricants is the key to extending bearing life. GfT Worksheet 3[12] Covers the theory and practice of rolling bearing lubrication.

Grease lubrication is the most common type of rolling bearing lubrication. The cleanliness level of bearing grease is affected by thickeners, base oils, additives (including Solid lubricant additives) and manufacturing process, and reflected in the running noise. Therefore, it is recommended to conduct rolling bearing grease noise test.

In addition, the grease noise test specified in this document can help grease manufacturers develop low-noise greases with high damping capacity.

It can also help rolling bearing manufacturers and end users to select low-noise grease with high damping capacity.

This document combines ISO 21250-1, ISO 21250-3 and ISO 21250-4 and covers the determination and evaluation of rolling bearing grease noise.

Test components and tester requirements for BQ method.

GB/T 43617 "Rolling bearings - Test for noise from rolling bearing greases" is intended to consist of four parts.

--- Part 1: Basic principles, test components and testers. Aims to specify common terms, basic principles and test methods for testing noise in rolling bearing greases.

This document contains the symbols, test principles, test conditions, test components and test equipment.

--- Part 2: Test and evaluation method BQ. Aims to specify the test and evaluation of rolling bearing grease noise according to the BQ method Evaluate.

--- Part 3: Test and evaluation methods MQ. Aims to specify the test and evaluation methods for rolling bearing grease noise according to the MQ method Evaluate.

--- Part 4: Test and evaluation methods NQ. Aims to specify the test and evaluation methods for rolling bearing grease noise according to the NQ method Evaluate.

Rolling bearings Rolling bearing grease noise test Part 2: Test and evaluation methods BQ

1 Scope

This document specifies the test and evaluation method BQ for rolling bearing grease noise.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 43617.1-2024 Rolling bearings - Test for noise from rolling bearing greases - Part 1: Basic principles, test components and Tester (ISO 21250-1:2020, IDT) ISO 5593 Rolling bearings-Vocabulary Note. GB/T 6930-2002 Rolling bearing vocabulary (ISO 5593:1997, IDT) ISO 15242-1 Rolling bearings-Measuring methods for vibration measurement Part 1: Fundamentals Note. GB/T 24610.1-2019 Rolling bearing vibration measurement method Part 1: Fundamentals (ISO 15242-1:2015, IDT) ISO 21250-1 Rolling bearings - Tests for noise from rolling bearing greases - Part 1: Basic principles, test kits and test apparatus andtestmachine)

3 Terms and definitions

For the purpose of this document, the terms and definitions defined in ISO 5593, ISO 15242-1 and ISO 21250-1 and the following apply.

The URLs for the terminology databases used in standardization work maintained by ISO and IEC are as follows.

Sampling rate

The continuous signal is sampled and converted to a discrete-time signal using the frequency used by < Signal Processing>.

Note. The unit is Hertz (Hz) or the number of samples (readings) per second [the number of samples per second (samples/s)].

Peak reset Manual or automatic zeroing of the peak detector.

4 Symbols, abbreviations and subscripts

The symbols, abbreviations and subscripts given in Table 1 and Table 2 of GB/T 43617.1-2024, as well as the symbols and abbreviations in Table 1 and Table 2 the subscripts in are applicable to this document.