Premium multi-application calcium sulphonate complex grease, PEERLESS LLG provides outstanding oxidation stability, excellent water resistance, outstanding rust protection and excellent load carrying ability under high operating temperatures. It is particularly recommended for high temperature and long life applications which include:
Equipment running continuously at temperatures up to 200°C/392°F and extremely wet conditions.
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.
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
801 mm - 1100 mm
1101 mm - 1500 mm
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.
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
900mm HDPE Idler
(Black) Part No. EuR 152/900
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 firstname.lastname@example.org