Mechanical safety refers to the existing state and guarantee conditions that can protect people's body and mind from the harm of external factors under various conditions during the whole process of using machinery based on human needs. Mechanical safety refers to the ability of the machine to perform predetermined functions under predetermined conditions of use, or not produce damage or harm to health during transportation, installation, adjustment, etc.
The safety function of machinery means that some functions of machinery and its parts are specially designed to ensure security Designed, it is mainly divided into two categories: main safety function and auxiliary safety function. It refers to the machinery whose failure of this function will immediately increase the risk of injury function 。 The main safety functions are divided into characteristic safety functions and relevant safety functions. Characteristic safety function: the main safety function to achieve specific safety through expectation. For example, the function of preventing the machine from being accidentally started (this function is generally realized through the interlocking device connected with the protective device), the single cycle function, and the two hand operation function.
Relevant safety functions: main safety functions except specific safety functions. For example, when setting the machine, bypass (or inhibit) the safety device (make it inoperative), manually control the dangerous mechanism, maintain the speed and temperature control function of the machine within the safe operation limit, etc.
It refers to the machine function that will not increase or produce danger immediately when this function fails, but will reduce the safety level. As an obvious example of the auxiliary safety function, such as the automatic monitoring function for some main safety function. However, if the automatic monitoring function fails, there will be no immediate danger, because the main safety function can still work, unless the main safety function also fails at the same time. The purpose of configuring auxiliary safety functions is to take corresponding preventive measures in case of failure of main safety functions. If the auxiliary safety function does not work, it means that a line of defense is missing and the level of safety is reduced.
