Large-tonnage cargo lift without machine room

Abstract

The invention provides a large-tonnage cargo lift without a machine room. The large-tonnage cargo lift without a machine room comprises a first lift car, a second lift car, a counterweight, a permanent magnet synchronous traction machine and a main track. A first car bottom diversion sheave and a second car bottom diversion sheave are arranged at the bottom of the first lift car. A third car bottom diversion sheave and a fourth car bottom diversion sheave are arranged at the bottom of the second lift car. A first counterweight diversion sheave and a second counterweight diversion sheave are arranged on the top of the counterweight. A third guide wheel is arranged over the first counterweight diversion sheave and the second counterweight diversion sheave. A first guide wheel and a second guide wheel which are parallel with the third guide wheel are arranged above the first lift car and the second lift car. The permanent magnet synchronous traction machine is arranged above the third guide wheel and is in transmission connection with the first guide wheel, the second guide wheel, the first car bottom diversion sheave, the second car bottom diversion sheave, the third car bottom diversion sheave, the fourth car bottom diversion sheave, the first counterweight diversion sheave, the second counterweight diversion sheave and the third guide wheel through a power transmission belt.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to a large-tonnage machine-roomless freight elevator. Background technique [0002] Nowadays, machine-room freight elevators in the elevator industry mainly use worm gear asynchronous hosts as power, and use a 2:1 traction ratio. It has problems such as large host size, high power, low operating speed, serious waste of building resources, and low energy conversion rate, which makes it difficult for many factory facilities to apply. In response to the above situation, the industry has gradually developed machine room-less freight elevators. Adopt permanent magnet synchronous traction host, use 4:1 traction ratio. However, because the rationality of the design structure cannot effectively eliminate the unbalanced load, the smoothness of operation is low, and the manufacturing cost cannot meet the expected indicators, it has been difficult to form a product; so a large-tonnage...

AI Technical Summary

Problems solved by technology

However, due to the rationality of the design structure, the unbalanced load cannot be effectively eliminated, the running stability is low, and the manufacturing cost cannot meet the expected indicators, so it has been difficult to form a product; so a large-tonnage machine-room-less freight elevator is urgently needed to solve the above problems

Images