GB/T 34896-2017Rotary shaft lip-type seals—Determination of friction torque (English PDF)

1 Scope

This standard specifies the determination method of friction torque of rotary shaft lip-type seals.

This standard is applicable to determining the friction torque of rotary shaft lip-type seals (hereinafter referred to as seals).

2 Normative references

The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 13871.2 Rotary shaft lip-type seals incorporating elastomeric sealing elements - Part 2: Vocabulary

GB/T 13871.4-2007 Rotary shaft lip type seals incorporating elastomeric sealing elements - Part 4: Performance test procedures

GB/T 21283.2 Rotary shaft lip-type seals incorporating thermoplastic sealing elements - Part 2: Vocabulary

HG/T 2069 Technical specification for two-axle radial force determinator for rotary shaft lip-type seals

3 Terms and definitions

For the purpose of this document, the terms and definitions given in GB/T 13871.2 and GB/T 21283.2 apply.

4 Test equipment

5 Specimen

At least three seal specimens shall be available.

6 Measurement prior to the test

The following data shall be measured prior to the test:

a) the outside diameter and roundness of the specimen;

b) the diameter of the column lip of the specimen;

c) the diameter of the minor lip of the specimen (if any);

d) measure the radial force of the major lip of the specimen according to HG/T 2069;

e) diameter and surface roughness of the housing bore of the seal;

f) diameter, surface roughness and surface hardness of test shaft.

Keys:

1——test liquid housing;

2——heating belt;

3——liquid filling bucket;

4——gas filling nozzle;

5——seal housing;

6——pulley;

7——main shaft;

8——specimen;

9——test shaft;

10——torque sensor;

11——test liquid;

d1——diameter of test shaft;

D——diameter of the housing bore of the seal.