预防推土机变速离合器烧损的有效措施（Effective measures to prevent burning of speed change clutch in bulldozer）.docVIP

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2017-08-22 发布于河南
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预防推土机变速离合器烧损的有效措施（Effective measures to prevent burning of speed change clutch in bulldozer）.doc

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预防推土机变速离合器烧损的有效措施（Effective measures to prevent burning of speed change clutch in bulldozer）

预防推土机变速离合器烧损的有效措施（Effective measures to prevent burning of speed change clutch in bulldozer） A YT220 type bulldozer after using two speed clutch that is not working properly, the replacement of a new transmission to continue to use, but the use of 20 days to found the bulldozer. Check transmission oil forward I block is only 0.50MPa, while the normal value should be (1.25 + 0.10) MPa, the gear oil pressure is 1.50-1.80MPa; the normal value should be (2.50 + 0.20) MPa; thus, users will be sent to our factory for maintenance of transmission. The dismantling of clutch that forward clutch gear has been seriously damaged sintering, lubricating oil groove expansion driven friction plate has been removed and the contact face forward gear ring has an annular groove grinding out a deep groove, the inner product with oil dirt, the retaining sealing ring has the same degree of wear surface. All parts of the whole clutch in a layer of black oxide, the residual oil is black, mixed with a lot of debris and clay, and smell, that has been a serious oxidative deterioration of hydraulic oil. The main reason for friction loss of 1, variable speed clutch (1) high temperature According to the degree of oxidation of transmission parts and the surface of the hydraulic oil to determine high oil temperature in hydraulic system, and the high temperature is influenced by the hydraulic system of hydraulic pump, oil filter, hydraulic oil cooler and other components and, in the hydraulic system oil impurities, causing oil filter blockage, hydraulic system circulation is blocked and, poor cooling cycle too fast, so that the temperature; temperature and speed clutch in rubber seal aging and cracking, its performance and life is reduced, causing the clutch and move from bonding is not good, and slippage from between the separation of clutch, the friction resistance increases, thereby accelerate serious friction clutch friction plate. (2) the improper selection of hydraulic oil According to the tran