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Powder metallurgy material and method for preparing wind power yaw brake pad
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A technology of yaw braking and powder metallurgy, which is applied in the direction of friction linings, mechanical equipment, gear transmission mechanisms, etc., can solve the problems of excessive end surface runout, one-sidedness, wear marks, etc., and achieve stable friction coefficient and strong oil resistance , the effect of strong wear resistance
Inactive Publication Date: 2020-04-21
XEMC WINDPOWER CO LTD +1
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However, in the long-term operation, problems such as potholes, wear marks or one-sidedness, and excessive runout of the end surface will appear on the dual surface of the brake pad.
Method used
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[0024] B. Put each component weighed in step A into the automatic batching machine by weight for mixing and stirring, the duration is 0.8h;
[0025] C. The materials mixed in step B are cold pressed under the condition of 3000KGF to form brake pads;
[0026] D. Burn the brake pads compressed in step C for 12 hours in a 900°C oven;
[0027] E. The sintered brake pads are polished, ground and sprayed into finished products.
Embodiment 3
[0029] A. Weigh 55kg of electrolytic copper powder, 6kg of tin powder, 10kg of flake graphite, 10kg of artificial graphite, 6kg of alumina, 5kg of chromium powder, 5kg of reduced iron powder, and 3kg of hydroxy nickel powder, and grind each component.
[0030] B. Put each component weighed in step A into the automatic batching machine by weight for mixing and stirring, the duration is 0.8h;
[0031] C. The materials mixed in step B are cold pressed under the condition of 3000KGF to form brake pads;
[0032] D. Burn the brake pads compressed in step C for 15 hours in a baking oven at 800°C;
[0033] E. The sintered brake pads are polished, ground and sprayed into finished products.
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Abstract
The invention discloses a powdermetallurgy material and method for preparing a wind poweryawbrake pad. The material comprises, by weight, 55-75% of electrolytic copperpowder, 2-6% of tinpowder, 5-10% of crystalline flake graphite, 5-10% of artificial graphite, 2-6% of aluminum oxide, 2-5% of chromium powder, 5-10% of reduced iron powder and 2-5% of hydroxyl nickel powder. According to the prepared brake pad, the problems that a brake dual face of the brake pad running for a long time cannot be bumpy or flat, and squeaking or low-frequency vibration occurs due to pressure yaw after end face runout is large are solved, and the brake pad cannot be damaged when burrs or sharp edges exist on the brake dual face in time. The brake pad further has the beneficial effects of being high in specific pressure, stable in friction coefficient, high in abrasion resistance and oil resistance and the like, and the brake working conditions that the brake dual face is damaged and a small amount of grease exists can be met.
Description
Technical field [0001] The invention belongs to the technical field of braking systems, and particularly relates to a powder metallurgical material and a method for preparing wind poweryaw brake pads. Background technique [0002] In recent years, wind power technology as a sustainable and pollution-free clean energy has been rapidly developed in my country. At present, my country has installed a large number of wind power generators in the north, south and coastal areas. The yaw brake is an important braking component of the wind turbine, and its brake pads play a vital role in the operation process. [0003] As a worn-out part, the brake pads will be consumed, be contaminated by oil or grease or produce abnormal noise during the operation of the fan. In order to solve the above problems, it is often necessary to replace the brake pads. However, during long-term operation, the brake pads will have potholes, wear marks or one-sidedness, and excessive end surface bounce on the dua...
Claims
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Application Information
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