JB/T 10187-2011Rolling bearings - Deep groove ball bearings - Technical requirements for vibration (velocity) (English PDF)

3.1 Peak-value of rolling bearings vibration (velocity)

The maximum positive peak-value of bearing vibration (velocity) within a given time interval.

5.1

Assessment method follows the provisions in Annex A.

5.2

In accordance with specified measuring method, select three roughly equidistant positions on cylindrical outside surface of bearing outer ring in peripheral direction. During the test of certain measuring plane, arithmetic mean of vibrations at three positions of some frequency band is the vibration (velocity) value of the measuring plane for this frequency band of the bearing. Maximum vibration (velocity) peak-value at three positions of some frequency band is the vibration (velocity) peak-value of the measuring plane for this frequency band of the bearing. After both sides are tested, take the vibration (velocity) and vibration (velocity) peak-value of the larger side as the vibration (velocity) and vibration (velocity) peak-value for this frequency band of the bearing.

6.1

For deep groove ball bearings of which the inner diameter is 3 mm ~ 60 mm, single bearing vibration (velocity) or vibration (velocity) peak-value of different groups shall comply with provisions in Table 1.

6.2

For deep groove ball bearings of which the inner diameter is 65 mm ~ 120 mm, single […]

A.3.3 Test procedures

A.3.3.1 Test procedures shall follow provisions in 5.4 of GB/T 24610.2-2009.

A.3.3.2 Test duration shall follow provisions in 6.5 of GB/T 24610.1-2009. If it cannot achieve a stable state within 5 min after the test is started, then the bearing shall be deemed and handled as an unqualified product.

Table A.2 Set frequency range

Rotating speed Low Frequency (L)

Intermediate

Frequency (M)

High Frequency (H) min max

Set Frequency fup fdown fup fdown fup fdown r/min Hz

882 909 50 150 150 900 900 5 000

1 764 1 818 50 300 300 1 800 1 800 10 000

A.4 Measurement conditions

A.4.1 Bearing measurement conditions

Bearing measurement conditions shall follow provisions in 6.1 of GB/T 24610.2-2009. In case of any objection against the test results of non-pre-lubricated bearings, NY-120 solvent oil is used to clean effectively. Test results after sufficient lubrication for L-AN15 total loss system oil shall prevail after solvent oil volatilizes and becomes dry. NY-120 solvent oil shall not contain tetraethyl lead and shall be filtered through a filter of which the filtration precision is not less than 0.45 µm. L-AN15 total loss system oil shall be filtered through a filter of which the filtration precision is not less than 0.8 µm. Other technical requirements follow provisions of GB/T 3141-1994.

A.4.2 Testing environment and testing device conditions

A.4.2.1 Testing environment follows provisions in 6.2 of GB/T 24610.2-2009.

A.4.2.2 Stiffness and loading mechanism of spindle/mandrel shall follow provisions in 6.3.1 and 6.3.2 of GB/T 24610.2-2009. Radial run-out at the position where mandrel (after combining with spindle) matches up bearing bore diameter shall not be greater than 5µm.

Axial run-out of mandrel shoulder shall not be greater than 10µm. The measurement method shall follow provisions in Annex B.

A.4.2.3 Foundation vibration of testing device shall not exceed provisions in Table A.3.

The measuring method shall follows provisions in Annex C.

Table A.3 Foundation vibration of testing device

Nominal Inner Diameter of Bearing d

Foundation Vibration max.

Exceeding To Low Frequency (L)

Intermediate

Frequency (M)

High Frequency (H) mm µm/s

3 a

15 10 7 4

15 60 12 10 5 […]