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A selection of proven high quality bearings chosen to meet requirements of any load.

 

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Low Noise Factor

Very low noise factor (57dba)

 

Manufactured from the best materials using the latest technology.

 

Low Noise Factor

 

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Encompasses four lip seals rotating on a plastic fitted bush.

 

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EU Roller API

 

Sound Test

 

HDPE Idlers Self Noise Testing


1 INTRODUCTION
Heggies Pty Ltd (Heggies) was commissioned by Longwall Advantage Pty Limited to measure the
Sound Power Level (SWL) of HDPE conveyor idlers.


2 SUPPLY SPECIFICATIONS
The aim is for the self noise of the idlers to achieve the design Sound Power Levels shown in Table 1.

 

Table 1

Idler-Roll Self Noise Overall Sound Power Level Criteria

Idler-Roll Length Range

Overall Sound Power Level (dBA re 1 ρW)

500 mm - 800 mm

67 dBA

801 mm - 1100 mm

68 dBA

1101 mm - 1500 mm

69 dBA

 

This report details the results of a type test, where three of each idler-roll type were selected at random and tested on a suitable test rig. It should be noted that the purpose of the test was to quantify the idler self noise when such rolls are operated at their design speed.


5 TEST RESULTS AND COMPLIANCE STATEMENT
Table 2 shows the results for each test as well as the resulting maximum sound power level of the
idler-roll type test. The results include the extraneous noise from the motor, and hence, are not within the accuracy tolerance stated in Section 4.3.

 

Table 2

Idler-Roll Type SWL Test Results (dBA re 1ρW)

Idler-Roll Type Description

Total Measured SWL for 3 Idler-Rolls

SWL for Single Idler Roll Supply

SWL Criteria

900mm HDPE Idler (Black) Part No. EuR 152/900

57.4 dBA

52.6 dBA

68 dBA

Note 1: All idler-rolls diameter 152 mm.

Note 2: All idler-rolls tested at design rotational speed 640 rpm.

 

5.1 COMPLIANCE STATEMENT
The results presented in Table 2 demonstrate that the SWL of the HDPE idler-roll type tests clearly
comply with the noise design goal.


I trust that the preceding provides sufficient detail for your current requirements. If you require any
further information please contact me on phone 4908 4500 or email rod.linnett@heggies.com.au


 

 

 

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