Elevator and its speed limiter
A technology of speed limiter and elevator, which is applied in the directions of transportation, packaging, elevators, etc., can solve the problems of reducing the clamping force of the clamp block, shortening the life of the speed limiter, and accelerating the wear of the clamp block, so as to achieve the effect of suppressing the temperature rise.
Active Publication Date: 2021-01-15
HITACHI LTD
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Problems solved by technology
[0003] When the oscillating pliers and the fixed pliers clamp the speed limiter rope, a lot of frictional heat will be generated, causing the temperature of the oscillating pliers and the fixed pliers to rise sharply, which will not only reduce the clamping force of the pliers, but also speed up the speed of the pliers. The wear of the block shortens the life of the speed limiter
Method used
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[0018] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0019] figure 1 It is a schematic diagram schematically showing one embodiment of the elevator of the present invention. figure 1 The shown elevator 100 includes a car 1 , a counterweight 2 , a traction machine 4 , a safety gear 7 and a speed governor 9 . The car 1 and the counterweight 2 are connected by the traction rope 3, and driven by the traction machine 4, they are raised and lowered in the hoistway along the guide rail 5 and the guide rail 6 respectively. There is a machine room above the hoistway. The traction machine 4 is installed in the machine room. The safety gear 7 is arranged below the car 1 .
[0020] The speed governor 9 has a speed governor sheave 10 arranged in the machine room, a tension pulley 11 arranged below the hoistway, and a speed governor rope 12 annularly connected between the sp...
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The invention relates to an elevator and a speed limiter thereof. The speed limiter comprises a speed limiter rope wheel (10), a fixed clamp block (32), a swinging clamp block (31), flailing blocks (13 and 14) and a clamp block locking mechanism, wherein the clamp block locking mechanism locks the swinging clamp block in a normal running state to keep a preset interval between the swinging clamp block and the speed limiter rope wheel and loosens the swinging clamp block under triggering of the flailing blocks to make the swinging clamp block and the fixed clamp block jointly clamp a speed limiter rope. At least one of the fixed clamp block and the swinging clamp block is provided with heat release parts (43 and 47), and the heat conductivity coefficient of the heat release parts is largerthan that of a clamp block body provided with the heat release parts. The portions, corresponding to the heat release parts, of a frame body (21) are provided with heat absorption parts (48 and 49), and the heat conductivity coefficient of the heat absorption parts is larger than that of the frame body. When the swinging clamp block and the fixed clamp block clamp the speed limiter rope, the heatrelease parts are in contact with the heat absorption parts. In this way, friction heat can be transferred to the heat absorption parts through the heat release parts, and thus temperature rise of theclamp blocks is inhibited.
Description
technical field [0001] The invention relates to an elevator and its speed governor. Background technique [0002] Elevator installations usually have a speed governor for monitoring the operating speed of the elevator. When the descending speed of the car exceeds the rated speed and reaches the first action speed of the speed limiter, the speed limiter will touch the overspeed switch, causing the control circuit to lose power and the brake to act. If the speed of the car increases further and reaches the second operating speed of the speed limiter, the clamp block of the speed limiter will clamp the speed limiter rope to make the safety gear act and force the car to stop. For example, the elevator device disclosed in International Patent Publication WO2017 / 130264A1 has a swinging jaw 6 and a fixed jaw 11a. When the car speed reached the second operating speed of the overspeed governor, the locking hook would let go of the swing jaw 6 to make it swing towards the fixed jaw ...
Claims
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IPC IPC(8): B66B5/04B66B5/24
CPCB66B5/044B66B5/24
Inventor 远藤广基
Owner HITACHI LTD