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Elevator buffer performance and related principles

Update:2021-03-17
Abstract:

In our daily life, the elevator is a thing we often use […]

In our daily life, the elevator is a thing we often use. Especially in some office buildings, the usage rate of elevators is very high. Many people are very curious about why elevators can carry people. They are very interested, but they don’t know much about the related content. , So tonight, we will give a detailed introduction to the principle of passenger elevator buffer performance.

1. Basic principles of elevator buffers

In the design of the CPU, the DC load capacity of the general output line can drive a TTL load. 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, and a buffer is required in a large system. Any program or data must be used by the CPU, first put it in the main memory (memory), that is, the CPU only exchanges data with the main memory, so the speed of the main memory determines the operating speed of the system to a large extent.

2. Introduction to throttling principle

Under the same stopping conditions, the buffer has a short buffering time. Most of the kinetic energy is converted into the internal energy storage of the oil through the accumulator, and the other part is converted into heat energy through the throttling effect. In theory. *The throttling method is trapezoidal boss and multi-hole type. Here* consider various factors such as structure, function, cost, etc., determine the cushioning performance* scheme from the theoretical design, and use radially distributed throttling holes to achieve throttling of the cushioning process. Although the response of the piston accumulator is not as sensitive as the bladder type, the cylinder processing and piston sealing performance requirements are higher, but through the design, the integration of the buffer structure can be realized, so that the cost is reduced, and the structure is compact. Therefore, the piston accumulator is finally selected.

3. Distance of elevator hydraulic buffer

In order to prevent the traction-driven elevator from overspeeding during the upward movement of the car and causing the elevator to rush to the top, the elevator is equipped with the upper station forced deceleration switch, the upper limit protection switch, the upper limit protection switch, the upward overspeed protection device, and the counterweight buffer. As a safety protection device. Among them, the upper limit protection switch and the upper limit protection switch are both braked to protect the safety of the elevator. When the elevator car brakes at the leveling position of the first landing and the counterweight weight is greater than the weight of the car, the elevator will slide upwards and an overtop accident will occur. At this time, when the car is at the leveling position of the first landing, the energy storage is For type buffers, the distance between the top surface of the buffer and the impact plate of the counterweight device should be 200mm-350mm. For energy-consuming buffers, the distance should be 150mm-400mm.

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