Casting method of aluminium alloy impeller assembly of large-diameter hydraulic coupler
A hydraulic coupling and aluminum alloy impeller technology, which is applied in the casting field of aluminum alloy impeller components, can solve the problems of high manufacturing cost, long manufacturing cycle, shallow flow path of steel impeller, etc., and achieve the effect of improving the manufacturing method
Inactive Publication Date: 2011-11-02
上海交大南洋机电科技有限公司
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Problems solved by technology
Due to technological reasons, the steel impeller channel is shallow and the volume is small, which cannot meet the geometrical requirements of the impeller channel, which affects the energy-saving effect of the speed-regulating hydraulic coupling, and the steel impeller assembly process is complex, the manufacturing cycle is long, and the manufacturing cost is relatively low. higher
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[0011] 1 Casting steps of large diameter aluminum alloy pump wheel
[0012] The pump wheel is one of the parts in the speed-regulating fluid coupling impeller assembly. Since the outer flange and blades are subjected to torsional stress and centrifugal force during operation, the mechanical performance requirements for the aluminum alloy pump wheel are relatively high. The casting steps of the aluminum alloy pump wheel are as follows:
[0013] 1.1 A number of cold irons must be placed in the casting cavity of the inner and outer flanges of the pump wheel to improve the local cooling rate. The cold irons should be coated with tung oil first, sprinkled with quartz sand, and dried before use.
[0014] 1.2 The density of the casting mold is moderate, and the glue used for molding should not be too much, which is convenient for the operation of the subsequent process of casting molding. The surface of the cavity should be sprayed with heat-resistant paint.
[0015] 1.3 An autom...
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Abstract
The invention discloses a casting method of an aluminium alloy impeller assembly of a large-diameter hydraulic coupler. The method comprises the following steps of: a) smelting aluminium alloy; b) manufacturing pump wheel casting cavities, putting a plurality of cold irons in the casting cavities of the inner edge flange and the outer edge flange of pump wheels, and casting the pump wheels; c) manufacturing turbine casting cavities, putting a plurality of cold irons in the casting cavity of the inner flange of a turbine, and casting the turbine; d) manufacturing the casting cavity of a rotary shell, putting a plurality of cold irons at the flange casting cavity of the rotary shell, and casting the rotary shell; and e) manufacturing the casting cavity of a side chamber baffle plate, putting a plurality of cold irons in the outer flange and inner hole casting cavities of the side chamber baffle plate, and casting the side chamber baffle plate. By putting the plurality of cold irons for improving local cooling speed in the casting cavities and by improving a manufacturing method of the casting cavities, the casting method disclosed by the invention ensures that casting quality of the aluminium alloy assembly meets various technical demands, so that the aluminium alloy impeller assembly cast by the method can replace a steel casting member, and the method can increase power transfer efficiency and decrease manufacturing cost.
Description
technical field [0001] The invention relates to a casting method of an aluminum alloy impeller assembly, in particular to a casting method of an aluminum alloy impeller assembly of a large-diameter hydraulic coupling. Background technique [0002] The impeller assembly of the hydraulic coupling is mainly composed of a pump wheel, a turbine, a rotating casing and a side chamber baffle, and is the main component for carrying and transmitting power in a speed-regulating hydraulic coupling. The performance of the impeller assembly is closely related to the comprehensive performance of the speed-regulating hydraulic coupling product and the size of the pump wheel moment coefficient, which directly affects the energy-saving effect of the product. [0003] Due to the high mechanical strength and reliability requirements of the impeller assembly, the current large-diameter impeller assembly parts are generally manufactured by combining steel castings and steel plates. Due to techno...
Claims
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Login to View More IPC IPC(8): B22D25/02B22D27/04
Inventor 吴卫国陆明奚经权冯荣华
Owner 上海交大南洋机电科技有限公司