1, the basic principle of the elevator buffer
In the design of CPU, the DC load capacity of the output line can drive a TTL load, but in the connection, a CPU address line or data line may be connected with multiple memory chips, but the memory chips are MOS circuits, mainly capacitor load, DC load is TTL load, therefore, In small systems, the CPU cannot be directly connected to memory, and in large systems, additional buffers are required. In order for any program or data to be used by the CPU, it must first be put into main memory (memory). In other words, the CPU only exchanges data with the main memory, so the speed of the main memory largely determines the speed of the system.
2. Throttle principle introduction
Under the same stop-stop condition, the buffer has a short buffering time, most of the kinetic energy is converted to oil storage by the accumulator, and other parts are converted to heat energy consumption by throttling. In theory. Drawing method is trapezoidal boss and porous type. Here we should consider the structure, function, cost and other aspects of the factors, from the theoretical design to determine the buffer performance of the scheme, the radial distribution of throttling holes to realize the throttling process. The reaction of piston accumulator is not as sensitive as that of leather bag, which requires higher performance of cylinder block processing and piston seal. However, the design can realize the integration of buffer structure, reduce the cost and make it compact. Therefore, the piston accumulator is chosen.
3. Distance of elevator hydraulic buffer
In order to prevent overspeed in the process of traction drive elevator to lift up, resulting in elevator collision, the elevator is set up on the upper end station forced deceleration switch, upper limit position protection switch, upper limit protection switch, upward overspeed protection device, heavy buffer and other safety protection devices. Among them, the upper limit position protection switch and the upper limit protection switch are brake to protect the safety of the elevator. If the elevator brake fails at the top level, the relative weight is greater than the weight of the elevator, the elevator will slip upward, resulting in a collision accident. At this time, when the elevator car is located at the top level, if it is an energy storage buffer, the distance between the upper surface of the buffer and the bearing device of the collision plate must be 200mm-350mm, if it is an energy dissipation buffer, the distance must be 150mm-400mm.