Introduction of Elevator Buffer Performance and Principle
Posted by Admin | 25 Jan
In our daily life, elevators are something we often use. Especially in some office buildings, the utilization rate of elevators is very high. Many people are very interested in the principle of why elevators can carry people, but they do not know much about the relevant content. , so today I will introduce the relevant introduction of the principle of passenger elevator buffer performance.
1. The basic principle of elevator buffer In the design of the CPU, the DC load capacity of the general output line can drive a TTL load, and in the connection, an address line or data line of the CPU may be connected to multiple memory chips, but the memory chips are all MOS circuits. It is a capacitive load, and the DC load is much smaller than the TTL load. Therefore, in a small system, the CPU can be directly connected to the memory, but a buffer needs to be added in a large system. For any program or data to be used by the CPU, it must first be placed in the main memory (memory), that is, the CPU only exchanges data with the main memory, so the speed of the main memory largely determines the operating speed of the system.
2. Introduction of throttling principle Under the same braking and stopping conditions, this buffer has a short buffering time, most of the kinetic energy is converted into the internal energy of the oil through the accumulator, and the other part is converted into heat energy through the throttling effect and consumed. In theory. The best throttling methods are trapezoidal bosses and porous ones. Here, we must consider various factors such as structure, function, cost, etc., determine the optimal buffer performance plan from the theoretical design, and use radially distributed throttling holes to realize the throttling of the buffer process. Although the response of the piston accumulator is not as sensitive as that of the bladder type, and the cylinder block processing and piston sealing performance are required to be higher, the structural integration of the buffer can be realized through the design, so that the cost is reduced and the structure is compact. Therefore, the piston accumulator is finally selected.
3. Elevator hydraulic buffer distance In order to prevent the traction drive elevator from overspeeding during the upward running of the car, causing the elevator to reach the top, the elevators are equipped with the upper end station forced deceleration switch, upper limit protection switch, upper limit protection switch, upward overspeed protection device, and counterweight buffer. device, etc. as a safety protection device. The upper limit protection switch and the upper limit protection switch both use the brake to protect the elevator safety. When the elevator car is at the leveling position of the highest floor, when the brake fails, and the counterweight is greater than the car weight, the elevator will slide up to cause a roof crash accident. At this time, when the car is at the leveling position of the highest floor, the energy storage For type buffers, the distance between the top surface of the buffer and the strike plate of the counterweight device should be 200mm-350mm, and for energy-consuming buffers, the distance should be 150mm-400mm.