30results about How to "Improve feed conditions" patented technology

The invention discloses a casting structure and casting method of an internal gear box. The casting structure adopts a bottom pouring type pouring system, and a bottom runner is arranged at the lower part. The improved pouring system is provided with an upper supplementary runner at the upper part of the riser root of the casting. It can adjust the temperature gradient when the casting is solidified, increase the feeding effect of the riser, and improve the local overheating phenomenon at the same time. Through the implementation of the casting structure, metallurgical defects such as cracks, looseness, and slag inclusions in the casting production process are reduced, the qualified rate of the casting is increased by 50%, the loss of waste products is reduced, and the cost is saved.

The invention discloses a centrifugally-cast stirring impeller and a method, and belongs to the technical field of impeller production. A plate of the impeller is prepared from chemical components bymass: 2.3-3.0% of C, smaller than or equal to 1.0% of Si, 0.5-1.0% of Mn, 17-23% of Cr, 0.3-0.8% of Mo, smaller than or equal to 0.035% of P, smaller than or equal to 0.06% of S, 0-1.5% of Ni, 0-1.0%of Co, 0-2.0% of Cu and the balance Fe and inevitable impurities. A hub is prepared from chemical components by mass: 0.3-0.4% of C, 0.6-0.9% of Si, 0.9-1.2% of Mn, 1.8-2.2% of Cr, 0.3-0.8% of Mo, smaller than or equal to 0.035% of P, smaller than or equal to 0.035% of S, 1.6-2.0% of Ni, 0.3-0.8% of Co and the balance Fe and inevitable impurities.

A method for hydrogenation of high-viscosity polyalphaolefin synthetic oil. The raw material of high-viscosity polyalphaolefin synthetic oil is mixed with circulating oil and then enters the first hydrogenation reaction zone and the second hydrogenation reaction zone for reaction. The reaction effluent is passed through After gas-liquid separation, the obtained liquid stream is subjected to fractionation to obtain light materials and heavy materials. The light materials are recycled to the raw material tank as circulating oil, and the heavy materials are refined polyalphaolefin synthetic oil products. The treatment method provided by the present invention improves the feeding status of the fixed-bed hydrogenation reactor, and solves the problem of partial flow of materials in the fixed-bed bed layer or incomplete hydrogenation in the fixed-bed hydrogenation reactor existing in the prior art , and obtained high-quality refined polyalphaolefin synthetic oil products.

The invention discloses a stepped laying hen cage, which comprises a laying hen cage main body, a feeding device, an egg collecting device, water drinking devices and a manure cleaning device, wherein the laying hen cage main body comprises a hen cage frame and more than four hen cage bodies; the hen cage frame is a trapezoidal frame; the hen cage bodies are symmetrically arranged at two sides of the hen cage frame to form a stepped structure; an egg tray is arranged at the lower part of each hen cage body; a trough is arranged in the outer side of each hen cage body; the feeding device is arranged above the troughs; the egg collecting device is arranged on the side surface of the laying hen cage main body and connected with the egg trays; the water drinking device is arranged in each hen cage body; and the manure cleaning device is arranged at the lower part of the laying hen cage main body. The stepped laying hen cage is high in automatic degree, full-automatic control on loading, feeding, water drinking, manure cleaning, egg collecting and environment is achieved, the labor intensity is greatly reduced and the labor cost is saved.

The invention discloses a copper sleeve centrifugal casting device in the copper sleeve production field; and the copper sleeve centrifugal casting device comprises a frame, a motor, a cylinder, casting molds and a mold cover. A support column is fixed on the frame; a cantilever is fixed at the top end of the support column; and the cylinder is fixed at a free end of the cantilever. The mold cover is fixed at an output end of the cylinder; and multiple resistance rings are arranged on the mold cover. A driving shaft is inserted in the middle part of the frame; multiple transmission shafts are uniformly and annularly distributed around the driving shaft; and gears are respectively arranged on the driving shaft and the transmission shafts. Multiple casting molds are provided, and are respectively fixed at the top ends of the driving shaft and the transmission shafts; and the resistance rings are corresponding to the casting molds one to one. The casting molds are double-layer structures provided with heating cavities. The motor is fixed below the frame; and the output end of the motor is connected with the driving shaft. A molded copper sleeve is excellent in feeding conditions, compact in structure and uniform in density, generates no deformation or cracks due to stress concentration in use, and is better in quality; and the centrifugal casting molding of multiple copper sleeves can be synchronously finished, so that the production efficiency of the copper sleeves is greatly improved.

The invention discloses special white oil for polystyrene and a preparation method of the special white oil. The preparation method of the special white oil for the polystyrene comprises the following steps: 1) carrying out solvent refining on fraction oil of naphthenic base crude oil in an extraction tower; obtaining an extracted solution at the tower bottom of the extraction tower, and obtaining a refined solution at the tower top of the extraction tower; recycling a solvent to obtain refined oil; 2) carrying out a hydrogenation process and distillation and cutting on the refined oil to obtain the special white oil for the polystyrene, wherein the hydrogenation process comprises the steps of hydrogenation treatment, catalytic dewaxing, hydrogenation refining and hydrogenation to deeply saturate aromatic hydrocarbon in sequence. By adopting the preparation method disclosed by the invention, a feeding condition of a hydrogenation device can be effectively improved and operation conditions of the hydrogenation device are alleviated; the content of cycloparaffin in the PS white oil is effectively increased; harmful substances including the aromatic hydrocarbon and the like in an oil product can be deeply removed through a plurality of sections of hydrogenation processes, and application performance and safety of the PS white oil are guaranteed. The special white oil for the polystyrene, disclosed by the invention, exceeds an existing product level; meanwhile, the preparation method is stable and reliable and has moderate operation conditions.

The invention relates to a forging process for a heavy truck gearbox and a die, which are used for forging the heavy truck gearbox. The forging process is characterized by adopting low-pressure forging; the forging die consists of an upper die and a lower die, wherein the upper die comprises an upper module, an upper die carrier, core pulling mechanisms, a composite positioning sleeve and a casting ejecting and resetting mechanism; the upper die carrier is connected with a machine tool; the number of the core pulling mechanisms is three; the lower die comprises a lower module, a lower die carrier and a composite positioning pin; a pouring head I (12) and a pouring head II (13) are arranged in the lower module; and the lower die carrier is connected with the machine tool. The forging process and the die do not need expensive investment, and can produce casting products according with requirements; the casting has no riser head, the pouring heads are small, and the utilization rate of the molten metal is high; the arrangement of the double pouring heads effectively shortens the filling stroke of the molten metal, and improves the feeding conditions when the casting is solidified; the casting is solidified under definite pressure to increase the consistency of casting tissues and improve the quality of the casting; and the production efficiency is high, and few auxiliary materials are consumed.

The invention relates to a separation process for magnetic red mixed ore based on iron material disseminated particle size treatment. The process comprises the operation of feeding the mixed ore withthe grade of 27%-29% and with magnetite as a main raw material into first-section closed circuit ore grinding operation to obtain a primary grading overflow product, and is characterized by further comprising first-section weak magnetic and strong magnetic operation, fine screening operation, first-section magnetic separation and first-section washing magnetic separation operation, second-sectionclosed circuits ore grinding operation, second-section weak magnetic strong magnetic operation, second-section magnetic separation and washing magnetic separation operation, third-section closed circuit ore grinding, third-section weak magnetic strong magnetic operation and reverse flotation operation. The final concentrate with the grade of 66%-66.5% is obtained through the operation. Compared with the prior art, the separation process has the advantages that 1) an efficient separation process which is characterized in that the concentrate can be obtained once dissociation is achieved and segmented ore grinding, segmented concentrate taking and segmented tailings discharging are achieved is provided for the magnetic red mixed ore with the non-uniform iron material disseminated particle sizes, so that overgrinding is reduced, and energy conservation and consumption reduction are achieved; 2) magnetic separation equipment is adopted for upgrading, and three sections of ore grinding is carried out by adopting vertical mills; and 3) the process is simple in structure, free of middling circulation, easy to implement on site and easy to produce and manage.

A hydrogenation method for producing polyalphaolefin synthetic oil products. The high-viscosity polyalphaolefin synthetic oil raw material and circulating oil are mixed and then sequentially enter the first hydrogenation reaction zone and the second hydrogenation reaction zone for reaction, and the reaction effluent is passed through After gas-liquid separation, the obtained liquid stream is subjected to fractionation to obtain light materials and heavy materials. The light materials are recycled to the raw material tank as circulating oil, and the heavy materials are refined polyalphaolefin synthetic oil products. The treatment method provided by the present invention improves the feeding status of the fixed-bed hydrogenation reactor, and solves the problem of partial flow of materials in the fixed-bed bed layer or incomplete hydrogenation in the fixed-bed hydrogenation reactor existing in the prior art , and obtained high-quality refined polyalphaolefin synthetic oil products.

The invention discloses a tool for casting a NiCrAlYSi alloy target. The tool comprises a steel bucket of which the upper end is opened, wherein a graphite pad plate is arranged above the bottom of the steel bucket; a graphite mold is arranged above the graphite pad plate; an insulated feeder in a matching manner with the graphite mold is arranged at the upper end of the graphite mold; a cooling water tube is wound on the outer wall of the graphite mold in a spiral manner; one end of the cooling water tube penetrates outside the steel bucket and is used as a water inlet; the other end of the cooling water tube penetrates outside the steel bucket and is used as a water outlet; the water inlet is positioned below the water outlet; the space inside the steel bucket and on the outer side of the graphite mold is filled with aluminum oxide sand; the height of the top end of the aluminum oxide sand is no greater than that of the upper end of the graphite mold. In addition, the invention further discloses a method for casting the NiCrAlYSi alloy target by using the tool. The tool disclosed by the invention has the characteristics of simple structure, high use reliability, low cost, high repeated operability and the like.