GB/T 23891.3-2009Plain bearings -- Hydrodynamic plain thrust pad bearings under steady-state conditions -- Part 3: Guide values for the calculation of thrust pad bearings (English PDF)

Foreword

GB/T 23891 "under steady-state conditions bearing hydrodynamic pad thrust bearing" consists of the following three parts.

--- Part 1. Calculation of thrust pad bearings;

--- Part 2. Calculation function pad thrust bearing;

--- Part 3. Calculation of thrust pad bearing the allowable value.

This part of GB/T 23891 Part 3.

This section identical with ISO 12131-3:2001 "Under steady-state conditions bearing hydrodynamic thrust pad bearings - Part 3. W Xu calculated thrust block bearing value. " this section is equivalent translation ISO 12131-3:2001.

For ease of use, this section made the following editorial changes.

--- "This International Standard" be replaced by "this section";

"." --- With a decimal point instead of a comma as the decimal point, "";

--- Delete international standards foreword.

This part is proposed by China Machinery Industry Federation.

Bearing this in part by the National Standardization Technical Committee (SAC/TC236) centralized.

This section is responsible for drafting unit. Productivity Promotion Center in the machine.

Participated in the drafting of this section. Xi'an Jiaotong University, Zhejiang Bearing Co., Ltd. Shanghai Branch, Shanghai, Zhejiang send Bearing Co., Ltd., Zhejiang Oriental Bearing Co., Ltd., Zhejiang SF Oilless Bearing Co., Ltd., Zhejiang Changsheng Bearing Co., Ltd..

This part of the National Standardization Technical Committee Secretariat slide bearing responsible for the interpretation.

GB/T 23891.3-2009/ISO 12131-3:2001

Introduction

To make the tile according to GB/T 23891.1-2009 calculated thrust bearing to achieve sufficient operational reliability, the calculated run for high pressure ratio and/or extreme high speed operating condition, it is necessary to consider the heat, the elastic deformation, hydrodynamic and/or turbulence effects were More accurate calculation.

These values \u200b\u200bcharacterize the allowable operating limits depend on the size and geometry processing technology bearing tribological system. These are some of the experiences value. Even will be some impact in other areas, it is still able to meet the operational reliability (see GB/T 23891.1 Chapter 4).

Experience can be modified to suit specific applications.

GB/T 23891.3-2009/ISO 12131-3:2001 Bearing Under steady-state conditions of hydrodynamic thrust bearing pad Part 3. Calculation of thrust pad bearing the allowable value

1 Scope

This section GB/T 23891 requirements to avoid service in the pad thrust bearing damage allowable value.

Calculation and Definition of symbols used in the example given in GB/T 23891.1.

2 Normative references

The following documents contain provisions which, through reference GB/T 23891 in this section constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.

By GB/T 23891.1-2009 Plain bearings steady state hydrodynamic thrust pad bearings - Part 1. pad thrust bearing Calculation (ISO 12131:2001, IDT) ISO 4381 multilayer plain bearings Plain bearings - Lead and tin casting alloys ISO 4382-1 plain bearings single and multi-cast copper alloy bearings ISO 4382-2 bearing single bearing forged copper alloy ISO 4383 sliding bearing thin wall bearing metal layers of material 3 to avoid the wear and tear damage to the allowable value Lubrication. Oil should be clean and free of impurities, because if the presence of impurities will increase wear and tear, strain and local overheating, which would weaken the slide the normal function of the bearing. When necessary, oil should be filtered.

Empirical formula (1) (see reference [1]) Calculated.

The formula takes into account the increase in the overall size of the bearing, increase manufacturing tolerances.

However, in this series of standards, processing methods and the actual status of the machine on a large machining tolerances, therefore, according to the formula Shaft flange error processing or thrust collar and exceed the allowable tolerances, will lead the thrust pad to fail.

Also, how long the machine under mixed lubrication state is also very important to work at startup and shutdown. For higher rotation Speed, should increase the minimum allowable normal operation when the oil film thickness, so that shutdown will not be too fast to reach the mixed lubricating condition.

Where.

C = 1.6 × 10-5 ~ 6.3 × 10-5;

GB/T 23891.3-2009/ISO 12131-3:2001