The machine room-less elevator is relative to the machine room elevator, that is to say, the equipment in the machine room is miniaturized as much as possible while maintaining the original performance by using modern production technology, eliminating the machine room, and replacing the control cabinet, The traction machine, speed limiter, etc. are moved to the top of the elevator hoistway or the side of the hoistway, thereby eliminating the traditional machine room. In order to meet the special requirements of customers for height and roof.
1. The advantages of elevator without machine room compared with elevator with machine room
1. The advantage of the machine room is that it saves space and can only be built as an overhaul platform under the host.
2. Since there is no need for a computer room, it has greater benefits to the building structure and cost. This allows architects to have greater flexibility and convenience in design, and gives designers greater freedom. At the same time, due to the cancellation of For the machine room, for the owner, the construction cost of the machine room-less elevator is lower than that of the machine room elevator.
3. Due to the particularity of the overall design of some antique buildings and the requirements for the roof, the elevator problem must be solved within an effective height, so the machine roomless elevator meets the needs of this type of building. In addition, in places with scenic spots, because the machine room is located High floors, thereby destroying the local ethnicity and foreignness, if the machine room-less elevator is used, because there is no need to set up a separate elevator main room, the height of the building can be effectively reduced.
4. Places where it is inconvenient to set up elevator machine rooms, such as hotels, hotel annex buildings, podiums, etc.
2. The disadvantages of elevator without machine room compared with elevator with machine room
1. Noise, vibration and limitations of use.
There are two popular ways to place the host of the machine roomless: one is that the host is placed on the top of the car and connected by guide wheels in the hoistway. No matter which method is used, the influence of the noise is very large, because the steel connection is used, and the noise must be digested in the shaft, plus the sound of the brake, the sound of the fan will be amplified. Therefore, in terms of noise, the machine room is obviously larger than the machine room.
In addition, due to the rigid connection of the host, the resonance phenomenon is inevitably transmitted to the car and the guide rail, which has a greater impact on the car and the guide rail. Therefore, the comfort of the machine room is obviously weaker than that of the machine room. Due to the influence of these two items, the machine-room-less elevator is not suitable for high-speed trapezoids above 1.75/s.
In addition, due to the limited supporting force of the hoistway wall, the load-bearing capacity of the machine room-less elevator should not be greater than 1150 kg. Excessive load-bearing requires too high a load-bearing capacity of the hoistway wall, and we usually have a thickness of 200mm for reinforced concrete, brick-concrete structure Usually 240mm, it is not suitable for carrying too much load, so the trapezoidal machine room below 1.75m/s and 1150kg can replace the organic room. For large-capacity high-speed elevators, machine-room elevators are significantly better than machine-room elevators.
