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