【正文】 ver again, so that the valve opening and closing time, a safety valve to work properly.Test steps are as follows: 1 close the gas supply valve。 2 connected to water。 The 3 starting unit。 4 observe the working pressure, slowly clockwise pressure regulating bolt, when the pressure reaches the set value, the safety valve does not open or up to the specified value before the open, it must be adjusted.The adjustment procedure is as follows: 1 remove the cap and seal。 The 2 valve opening soon, loosen locknut and a positioning bolt half ring, valve open too late to loosenThe nut about a circle and release the positioning bolts half circle. 3 repeat detection step, the safety valve set pressure value, still can not open, again adjustment.Motor overload relay The relay normally open contact, must be closed, when the current exceeds the rated value, cut off the motor power supply. The maintenance of screw pressor relative to the piston pressor is to lower the probability of a failure of many, but if use improper maintenance, the advantages of screw pressor is difficult to play. Many users began to use piston pressor screw air pressor, due to the maintenance of screw pressor does not understand, leading to frequent failure, causing the conflict between users and enterprises. So before using screw pressor to his use and maintenance instructions carefully read. Installation place, on the machine39。s air ventilation, pressure station power supply cable and air switch specifications, water pressure and flow, exhaust pipe sizes have guidance. The instructions also principle and structure of the machine are described in detail, there are certain basic knowledge of mechanical and electrical personnel through carefully reading, can make correct judgement and treatment for mon problems. There is a consumable part of screw pressor to the regular replacement of main lubricating oil, oil filter, air filter, oil filter, notable is replaced in the environment of different parts of the frequency also has the difference, so the screw pressor to daily use and inspection record.Transmission gear and belt drive In the transmission system of the air pressor, generally can be divided into direct transmission and belt drive, longterm since, two kinds of transmission way merits has been one of the focus of the debate. Direct drive screw air pressor refers to the spindle motor through a coupling and a gear to drive the rotor, direct drive which in fact is not the real meaning of. Direct drive on real significance is directly connected to motor and rotor (coaxial) and the speed. This is obviously a little. So that the direct drive no energy consumption point of view is wrong. Another way of drive for belt drive, the drive through the belt wheels of different diameters is allowed to change the rotating speed of the rotor. Belt drive system discussed below is a representative shall meet the following conditions of the automation system of the latest technology: Belt 1, each operating state of tension reached the optimal value 2, by avoiding the tension, greatly prolong the working life of the belt, while reducing the motor and rotor bearing load。 3, always make sure that the correct belt wheel is connected。 4, replacement of the belt is quite easy and fast, and do not need to adjust the original setting。 5, the belt drive system safe and troublefree operation.The parison of transmission1 efficiency.Gear transmission efficiency can reach 98%~99% excellent, belt drive design excellent under normal working conditions and efficiency reached 99%. The difference does not depend on the choice of drive mode, and depending on the manufacturer39。s design and manufacturing level.2 noload power consumptionFor direct gear driving mode, noload pressure generally maintained at more than , some even as high as 4bar, to ensure that the gear lubrication. The belt drive mode, theory of noload pressure can be zero, because the rotor into the oil to lubricate the rotor and bearing. General for the sake of safety, the pressure maintained at about . Taking gear pressor a 160kW for example, 8000 hours per year, of which 15% (1200 hours) time for noload, the machine every year than the same power air pressor belt drive more consumption of electricity (28800kwh noload assuming two machine pressure is 2bar, the difference of the energy consumption of about 15%.), over the long term, this will be no small cost.3 oil loss The actual users experienced all know, oil loss under the condition of the first victims will be the gear box. Belt drive system is not the existence of such security problems.4 according to user requirements design working pressure The working pressure and manufacturers usually user requirements of the standard model of the pressure is not pletely consistent. For example, the user39。s requirements in accordance with the pressure of 10bar, after processing equipment, pipe length and different requirements of sealing, the pressure of air pressor may be 11 or . In this case, the general will install a rated pressure of 13bar e air pressor and in the field to the outlet pressure set for the required pressure. The exhaust volume will basically remain unchanged, because the ultimate working pressure is reduced, but did not increase the speed of rotor. The belt transmission design manufacturers on behalf of the modern technology simply change the belt pulley diameter and the pressure of work designed to be pletely consistent with the requirements of users, so that users with a motor with a power which can get more air volume. For the wheel transmission, is not so easy.The installed 5 air pressor pressure change Sometimes because of technological conditions for the production of the user changes, the design pressure of air pressor of the original purchase may be too high or too low, will change, but for the pressor gear transmission, this work