Abstract: Disclosed are a combined blade device and a combined air outlet device. The combined blade device includes a hub, diagonal flow blades, and centrifugal blades, where a first air inlet is formed outside an edge of a first end of the hub, and a first air outlet is formed outside an edge of a second end of the hub, the hub is internally provided with a centrifugal cavity, the first end of the hub is provided with a second air inlet, the first air inlet surrounds the second air inlet, the second end of the hub is provided with a second air outlet, both the second air inlet and the second air outlet are communicated with the centrifugal cavity, and the hub expands gradually in a direction from the second air inlet to the second air outlet.

Abstract: The combined fan blade structure includes: an inner hub, an outer hub, a first blade set, and a second blade set. The outer hub and the inner hub are coaxially arranged, the first blade set is connected to an outer peripheral surface of the outer hub, the second blade set is located between the inner hub and the outer hub, and the outer hub blocks the second blade set.

Abstract: A method includes a first brake block of a first brake rubber, a second brake block mounted with a second brake rubber and a mounting base for mounting the first and second brake blocks. The second brake rubber is movable along a direction slanted with respect to an axis of rotation of the traction sheave. A brake block actuation member is triggered by the brake blocks to enable the first and the second brake rubbers to hold the traction sheave. A switching member is also triggered by the action of the second brake rubber, cutting off a safety circuit of the elevator. The external power is cut off, and the brake block actuation member enables contact between the second brake rubber and the traction sheave. The traction sheave further drives the second brake rubber triggering the brake block members to generate frictional braking force to stop the traction sheave.

Abstract: A traction sheave safety device and elevator car emergency stop method includes a first brake block of a first brake rubber, a second brake block mounted with a second brake rubber and a mounting base for mounting the first and second brake blocks. It uses a first and the second brake rubbers disposed on the two sides of the traction sheave. The second brake rubber is movable along a direction slanted with respect to an axis of rotation of the traction sheave. A brake block actuation member is triggered by the brake blocks to enable the first and the second brake rubbers to hold the traction sheave. A switching member is also triggered by the action of the second brake rubber, for cutting off a safety circuit of the elevator when the elevator car is in abnormal operation.