LS/T 3525-1995 in English

Analysis of Standard Technical Framework

Detailed Explanation of Key Technical Requirements

1. Sieve Structure Specifications

The clearance between the sieve grid and the sieve body must be ≤0.15mm, and the tension of the sieve sheet should comply with the GB3943 standard. In actual applications, a grain machine factory uses 304 stainless steel screen with a pneumatic tensioning device to control the flatness error of the screen surface within ±0.1mm.

2. Dynamic Balancing System

The mass tolerance of the balancing block is ±1%, which is equivalent to the allowable error of ±100g for a 10kg balancing block. A case shows that the use of a high-density tungsten alloy balancing block can reduce the vibration amplitude by 42%.

Background of Standard Evolution

The 1995 version of the standard has major improvements over its predecessor: the power consumption index is reduced from 0.8kW·h/t to 0.5kW·h/t, and the reliability requirement is increased from 95% to 98%. This reflects the pursuit of energy saving and consumption reduction technology at that time.

Implementation Suggestions

1. The six process indicators in Table 1 should be tested during the acceptance of new equipment
2. It is recommended to monitor the bearing temperature rise with a semiconductor point thermometer every quarter
3. The mesh size tolerance specified in GB5331 should be tested simultaneously when the screen is replaced