Travel switch is widely used in our lives, household industry is used, in the actual industrial production, travel switch plays a very important role, if there is damage, failure, may not be able to work normally, can not play a good role in limite or placement, serious will lead to derailment or production paralysis and other situations. Below I will introduce some common faults and maintenance methods of the travel switch:
1.Common fault of the travel switch
1, When the roller in the collision, the lever is stuck by debris, can not drive the contact; Or the operating head is tilted, cannot collide with the parts, when the travel switch drives the motor Due to the limited elastic life of the spring plate, the travel switch can not spring back during the collision, or the selected model has insufficient elasticity; Or the contact falls off due to the manufacturing problem in the long-term work, and can not drive the motor after contact, the above situation will occur after the position switch is reset, but the normally closed contact can not be closed, which is equivalent to the circuit has been in a disconnected state;
2, the installation position of the switch is improper; The electrical conductivity of the contact is aging, and it cannot conduct electricity well during operation, and the contact is poor; Or the connection line of the contact is broken and fall off; Due to the wrong selection of the switch model, in the long-term operation, the coil aging or excessive current caused by coil burn, (the power industry generally use a magnetic blow out stroke switch, which can withstand relatively large DC current) contact and circuit loss connection, these situations will make when the component the switch, the contact does not make any action;
3, the measurement of the position of the travel switch in the installation process is not accurate, the position is low, or due to process problems or impurity in the switch, the mechanical resistance is too large, which will make the contact no action after the lever deflection.
2, Travel switch maintenance methods
1. For the phenomenon that the normally closed contact can not be closed: we should clean the switch on time, adjust the position of the moving contact again, and replace the spring or contact with one that meet the requirements;
2, for the phenomenon that the contact does not act, we should adjust the position of the switch in time according to the actual needs, clean or replace the contact with the poor contact, and strengthen the connection between the connection and the contact, or replace the connection line.
