Detailed discussion on the strategy of bearing noise reduction

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Detailed discussion on the strategy of bearing noise reduction

Source: China Bearing Network Time: 2013-07-28
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(1) The method of changing the speed of the corresponding part of the host is that the noise of the rolling bearing is not very sensitive to the load; but it is very sensitive to the speed; in the case of the conditional response; the method of increasing the torque by decreasing the speed of rotation reaches the same operational intention; The noise dropped.
(2) Adding chemical additives to the lubricant of the bearing by means of chemical additives; it can reduce bearing noise.
(3) Using vibration absorbing or vibration isolation equipment to reduce bearing noise or block bearing noise; excellent results can be obtained; but this often pays great economic value; sometimes makes the tissue larger; heat dissipation conditions are worse Or simply rusting; all should be considered when using it; as long as other methods are adopted, the law cannot be reached in the future.
The most simple example is a radial ball bearing that accepts thrust at high speed instead of a thrust bearing; a plastic outer casing that is filled with anti-rust lubricating oil can be placed on the outer ring; a thrust bearing with a casing or a normal thrust bearing is promised. In the case; the same plastic sleeve is set in the inner hole or the outer circle; but the control does not collide or dry with the adjacent parts when rotating. This method has a certain noise reduction effect.
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Overview
Quick Details
Place of Origin:
Jiangsu, China (Mainland)
Brand Name:
Huaxin power
Key word:
Compact Busbar Trunking
Current Rating:
200 A to 6300 A
System Voltage:
AC380V/690 V
Type:
Compact Busbar trunking
Series:
compact busbar trunking
Packaging & Delivery
Packaging Details:
Compact busbar trunking: 
standard export packaging or customized packaging
Delivery Detail:
2-3 weeks
Compact Busbar Trunking
 
1. Current rating: 200 A to 6300 A
2. Ingress protection of IP54 & IP65
3. Excellent short circuit ratings [upto 100KA]
4. Standard lengths of 4m / 3m / 2m / 1m
5. System voltage: AC380V/690 V
6. Conductor material: high conductivity copper bar
7. Halogen free, fire retardant Class-H-Epoxy insulation
8. Tap - off units are suitable for MCCBs or SDFs or MCBs
9. Configuration of 3P3W / 3P4W / 3P5W with or without integral earth
10. Flexible system direction to meet cross arrangement
11. It can be re-used after disassemble.
 
Competitive Advantage
 
1 Well and High Quality Control
2 Prompt Delivery
3 Customer's Design and Logo are Welcome
4 Competitive Prices
5 Small Order Acceptable
6 Packaging detail: standard export packaging or customized packaging
 
 
Description
 
XLV series busway trunking system is advanced and energy-saving type developed by ZHENDA. It adopts British Henrob and Germany EPRESS self-piercing riveting technology, and the overall structure of enclosure are riveted together automatically, ensuring high degree of automation. The use of hydraulic pressure makes the overall strength of busway being substantially enhanced, and has a good sealing effect and anti-seepage feature.
Besides above, it has features below:
1. Flexible system direction to meet cross arrangement
2. Space saving
3. Can be re-using after disassembled.
4. High short-circuit strength and protection degree.
5. Both nut tightening and self-piercing riveting technology are available.
6. It adopts floor plates to double the heat dispersion.
7. Compact construction, good heat dispersion, low impedance, reliable and easy to installation and maintenance.
 
Technical Parameters
 
Rated current(A) 250 400 630 800 1000 1250 1350 1600 2000 2300 2500 3150 3800 4000 4500 5000
Rated voltage AC380/690V  
Rated insulated voltage 660-1000V  
Rated frequency 50/60Hz  
Rated short-time withstand current  
30(KA)  
80(KA)  
100(KA)  
Overvoltage category/Pollution degree  
III/3  
Protection degree IP40,IP54,IP65  
Weight(kg/m) 9 11.5 12.5 15 18 23 25 32 40 48 55 69 83 90 102 116
Impedance of relative neutral line at temperature 35°C and frequency 50Hz  
Resistance 0.12 0.105 0.092 0.081 0.062 0.05 0.038 0.029 0.023 0.018 0.015 0.014 0.012 0.011 0.009 0.008
Reactor 0.051 0.045 0.039 0.033 0.027 0.022 0.019 0.014 0.011 0.009 0.008 0.007 0.006 0.005 0.004 0.004
Impedance 0.13 0.114 0.101 0.087 0.068 0.055 0.042 0.032 0.025 0.02 0.017 0.016 0.013 0.012 0.01 0.009
 
Comparison between enclosure and conductor section area (equivalent with aluminum enclsoure)
 
Current(A) PE section area
400 320%
630 274%
800 240%
1000 305%
1250 235%
1400 211%
1600 187%
2000 157%
2300 136%
2500 121%
3100 221%
3800 197%
4300 184%
5000 171%
 
Tap - off units are suitable for MCCBs or SDFs or MCBs
 
Protection unit Current(A) H(mm) W(mm) L(mm)
Fuse 16-25 310 250 500
Switch 32-160 270 360 450
200-400 340 390 550
630-800 370 550 700
Breaker 16-200 310 250 550
250-400 310 340 650
630-800 350 340 950
 

Compact Busbar

Compact Busbar,Compact Busbar Duct,Compact Busbar Trunking,Electrical Bus Duct

Yangzhong Huaxin Power Equipment Co.,Ltd , http://www.huaxinbusbarchina.com