27results about How to "Raise the temperature gradient" patented technology

The invention relates to the technical field of single-crystal high-temperature alloys, in particular to a control method for dendritic crystal spacing in the growth process of a multi-layer module single-crystal high-temperature alloy. The method comprises the following steps: fixing a pre-prepared multi-layer module single crystal alloy ceramic shell with a graphite center column on a water-cooling copper disc of a liftable bracket of multi-layer module directional solidification equipment; after the mother alloy is smelted, standing is conducted, and the smelting furnace is controlled to pour alloy liquid into the multi-layer module single crystal alloy ceramic shell; and the multi-layer module single crystal alloy ceramic shell filled with the alloy liquid is pulled into the solidification cavity under the driving of the transmission device, so that directional solidification is realized, and the small-dendrite-spacing single crystal high-temperature alloy test bar is obtained. According to the method, under the condition of not changing the casting process, the problems of overlarge dendritic crystal spacing and isotherm inclination caused by the shadow effect of radiation heat dissipation in the directional solidification process of the multi-layer module single crystal high-temperature alloy are solved, and the qualified rate of large-batch production of single crystal blades is effectively increased.

This utility model discloses a novel sintering tungsten ...

This invention relates to the field of wearable electronic device technology, specifically disclosing a partitioned, double-sided, skin-contact, sweat-wicking hybrid energy harvesting armband and its manufacturing method. The armband includes a flexible strip substrate, an organic photovoltaic (PV) power generation unit, a polymer thermoelectric power generation unit, a skin-contact thermal interface layer, a cold-end heat dissipation structure, and a circuit integration module. The PV power generation unit and the polymer thermoelectric power generation unit are partitioned and mounted on the same flexible strip substrate. Microstructured channels are pre-set within the skin-contact thermal interface layer to guide sweat and reduce contact thermal resistance. A process route is adopted where the organic PV is first fabricated and encapsulated with high barrier properties, followed by the printing of the polymer thermoelectric power generation unit. A porous fabric or fin array heat dissipation structure is integrated at the cold end of the polymer thermoelectric power generation unit. This invention can improve photoelectric conversion efficiency, stabilize operating temperature difference, reduce contact thermal resistance, increase manufacturing yield, enhance output power, and improve wearing comfort.

This invention discloses a method for controlling porosity and shrinkage cavities in large-size equiaxed crystal high-temperature alloy castings, belonging to the field of investment casting technology. The method includes: (1) wrapping the large-size casting shell with asbestos, then placing the asbestos-wrapped shell into a sand box, wherein the sand box is modified according to the asbestos-wrapping molding process of the casting; (2) smoothly loading the sand box containing the shell into a muffle furnace for shell pre-firing; (3) using a shell transfer cart to transfer the shell to the ingot mold chamber of a vacuum smelting equipment for smelting, and then casting to obtain a large-size equiaxed crystal high-temperature alloy casting. This method reduces or eliminates the tendency to form porosity and shrinkage cavities by controlling the temperature field of the sand box and the shell transfer time.

The invention belongs to the technical field of turbine blade precision casting, and particularly relates to a slender thin-wall blade module preparation system and process. The pouring cup is communicated with one end of the middle pouring pipe pouring gate, the other end of the middle pouring pipe pouring gate is communicated with the blade crown flower disc pouring gate, the side wall of the middle pouring pipe pouring gate is communicated with the tenon disc pouring gate, and the tenon disc pouring gate and the blade crown flower disc pouring gate are communicated with the two ends of the blade wax mold respectively; the tenon disc pouring gate comprises a first inner ring disc and a plurality of first connecting rods; the inner ring of the first inner ring disc is communicated with the central casting pipe pouring gate, the outer ring of the first inner ring disc is communicated with one end of the first connecting rod, and the other end of the first connecting rod is communicated with the first outer ring disc; a tenon main body is arranged on one end face, facing the blade wax mold, of the first outer ring disc in a communicating manner; molten metal firstly fills the whole disc of the tenon disc pouring gate and then flows to the blade position, more molten metal flows into the blade crown disc pouring gate through the middle pouring pipe pouring gate, and bottom pouring in the preparation system is dominant.

The utility model discloses a water cooling screen and a single crystal furnace. In the water cooling screen, an annular cooling water channel is formed in the body, and the water inlet channel and the water outlet channel are both communicated with the annular cooling water channel of the body; an annular cooling water channel is formed in the additional cooling cavity; the water inlet channel and the water outlet channel are also communicated with the annular cooling water channel of the additional cooling cavity; the additional cooling cavity and the body extend in the same direction, a bottom opening of the additional cooling cavity is located above a top opening of the body, and the outer diameter of the additional cooling cavity is smaller than the inner diameter of the top of the body. The cooling effect of the water cooling screen is improved, and the equal-diameter growth rate of the single crystal furnace is improved.

The utility model relates to poultry embryo culture equipment for vaccines, and belongs to the technical field of vaccine production. The device comprises a culture room, door bodies are arranged at the two ends of the culture room in the length direction respectively, and a pair of parking spaces are symmetrically arranged in the culture room; an air supply device is arranged above the adjacent areas of the two parking spaces respectively, each air supply device comprises a rotating rod and a swing rod which are arranged in parallel, and the rotating rods and the swing rods are jointly connected with a set of transversely-arranged fans. The rotating rod is rotatably connected with the two side walls of the culture room in the width direction, the two ends of the swing rod are inserted into the arc-shaped kidney-shaped holes in the side walls on the same side in a clearance fit mode and extend outwards, and the extending part of the swing rod is connected with a locking device; a temperature and humidity sensor and a heating device are further arranged in the culture chamber, and the fan, the temperature and humidity sensor and the heating device are electrically connected with the controller. According to the utility model, the internal flow field of the vaccine culture machine is optimized, the temperature gradient is improved, the growth uniformity of poultry embryos is greatly improved, and the pre-incubation live embryo rate and the vaccine preparation efficiency are improved.

The invention discloses a total dry method sensible heat recovery device and method for converter gas OG method transformation. The total dry method sensible heat recovery device comprises a converter, an evaporation cooling flue, a gas cooler and a switching station. The inlet end of the evaporative cooling flue is connected with an outlet of the converter, an outlet of the evaporative cooling flue is connected with an inlet of the gas cooler, and a smoke outlet is formed in the position, close to the bottom, of the gas cooler and connected with an inlet of the switching station. Compared with a traditional boiler heat exchanger, the gas cooler is adopted, a forced convection efficient heat exchange mode is adopted, the temperature gradient isothermal body design is optimized, the heat efficiency is improved, meanwhile, the temperature of equipment does not change drastically, meanwhile, the equipment structure is reduced, and a transformation project can be conveniently installed in a converter workshop. According to the whole technological process, water is not sprayed to the converter gas, the converter gas is always kept dry, and compared with a traditional water spraying cooling mode, water resources are greatly saved, environmental pollution is reduced, heat is recycled, waste of gas heat is avoided, and the heat value of the gas is increased.

The application discloses an inner-outer layer refrigeration freezer, which comprises a box body and a refrigeration module, and first air duct components and second air duct components are arranged on the two side walls of the inner cavity of the box body respectively; the refrigeration module comprises an evaporator; the lower part of the first air duct component is provided with a first air inlet facing the inner cavity of the box body, the evaporator is arranged in the air duct of the first air duct component, the upper part of the first air duct component is provided with an axial flow fan, and the axial flow fan is located above the side of the evaporator facing the inner cavity of the box body; the lower part of the second air duct component is provided with a second air outlet facing the inner cavity of the box body, and a cross flow fan is arranged in the air duct of the second air duct component, and the air outlet of the cross flow fan is aligned with the second air outlet. The inner-outer layer refrigeration freezer can make the inner-outer layer refrigeration areas to be reduced to the fresh-keeping temperature, and can preserve freshness and facilitate taking.

The invention provides a method for increasing the pulling speed of a single crystal, which comprises the following steps: in the pulling process of the single crystal, keeping the position of a guide cylinder unchanged, setting a distance between the bottom of a water-cooling inner guide and the bottom of the guide cylinder in the working steps of melting, temperature stabilization, seeding, shoulder expansion and shoulder rotation, keeping the distance unchanged, and moving the water-cooling inner guide downwards in the working step of equal diameter, and the bottom of the water-cooling inner guide is contacted with the bottom of the guide cylinder. The device has the beneficial effects that through relative movement of the water-cooling inner sleeve and the guide cylinder, the distance between the water-cooling inner sleeve and a solid-liquid interface is reduced, the temperature gradient of a single crystal growth environment is improved, the single crystal pulling speed is increased, and the yield of the single crystal furnace is improved.

The invention relates to a method for eliminating the looseness defect of the shroud position of a turbine blade and a wax mold module, and belongs to the technical field of turbine blade casting. The method comprises the steps that S1, a blade wax mold is prepared, the blade wax mold comprises a crystal selection section, a blade crown, a blade body and a tenon which are integrally formed and sequentially connected, and a groove is formed in the connecting position of the crystal selection section and the blade crown along the contour shape of the blade crown; s2, a plurality of blade wax molds are assembled to form a wax mold module; s3, the wax mold module is adopted for preparing a pouring mold shell, and a blocking protrusion is formed in the position, corresponding to the groove of the blade wax mold, of the inner surface of the pouring mold shell; s4, the pouring mold shell and the inner cavity mold core are assembled to form a pouring module, and a crystal selection growth channel is formed between the pouring mold shell blocking protrusion and the inner cavity mold core; and S5, molten metal is poured into the pouring module, crystal selection growth of the molten metal is started from the tip crown end through directional solidification, and the turbine blade with the tip crown free of the loosening defect is prepared.

The invention relates to the technical field of wearable electronic equipment, and particularly discloses a partitioned double-sided skin-attaching perspiration type mixed energy collection arm band and a preparation method thereof, and the arm band comprises a flexible band-shaped substrate, an organic photovoltaic power generation unit, a polymer thermoelectric power generation unit, a skin-attaching heat conduction interface layer, a cold end heat dissipation structure and a circuit integration module. An organic photovoltaic power generation unit and a polymer thermoelectric power generation unit are arranged on the same flexible strip-shaped substrate in a partitioned mode, and a micro-structure channel is preset in a skin-attaching heat conduction interface layer to dredge sweat and reduce contact thermal resistance; a process route of firstly completing organic photovoltaic preparation and high-barrier packaging and then printing a polymer thermoelectric power generation unit is adopted; a porous fabric or fin array heat dissipation structure is integrated at the cold end of the polymer thermoelectric power generation unit. The photoelectric conversion efficiency can be improved, the working temperature difference can be stabilized, the contact thermal resistance can be reduced, the preparation yield can be improved, the output power can be enhanced, and the wearing comfort can be improved.

This invention discloses an indirect internal reforming solid oxide fuel cell connector, belonging to the field of fuel cell technology. The connector includes an anode plate, a reforming plate, and a cathode plate connected sequentially, all three plates being integrally formed. The reforming plate has a porous region for hydrocarbon fuel flow and for the reforming reaction to occur; the porosity gradient of the porous region decreases along the direction of hydrocarbon fuel flow. The cathode plate, anode plate, and reforming plate each have through holes for the flow of at least one of hydrocarbon fuel, reforming gas, and oxidizing gas; the through holes for hydrocarbon fuel flow are connected to the porous region. The anode plate and cathode plate, on the side away from the reforming plate, respectively have a first flow channel for the flow of reforming gas and a second flow channel for the flow of oxidizing gas. This connector avoids the damage to the battery structure and the deterioration of battery performance caused by excessive local thermal stress due to direct internal reforming, as well as anode carbon buildup.

The invention provides a method for growing a large-size plate-shaped eutectic fluorescent material for weapon separation and camera shooting, which is characterized by comprising the following steps of: staying a boat-shaped crucible in a preheating area of a multi-layer partition heat preservation and heat insulation screen for preheating treatment, increasing the power of a growth furnace to 17.5 kW, and when the head of a raw material close to the heating area of the multi-layer partition heat preservation and heat insulation screen starts to melt, stopping heating; moving the whole crucible into a heating area; after material melting is completed, the head of the crucible is moved to the junction of the heating area and the cooling area of the multi-layer partition heat preservation and heat insulation screen, and crystal pulling operation is started at the crystal pulling speed of 10-20 mm / h; and when the tail part of the crucible reaches the junction of the heating area and the cooling area, the eutectic growth is finished. The invention discloses a method for growing a large-size plate-shaped eutectic fluorescent material for weapon separation camera shooting, the temperature gradient can be maximally increased to 50 DEG C / cm, the growth rate of eutectic can be greatly increased, the eutectic distance is further prevented from excessively growing, and large-size plate-shaped Al2O3 / YAG: Re eutectic with better performance is obtained through growth preparation.

This utility model relates to a solidification mold for aero-engine blades, comprising a blade shell membrane, a base plate, a pouring head, a sprue, a runner, and a heat insulation plate. The heat insulation plate includes an inner heat insulation plate and an outer heat insulation plate. The outer edge of the inner heat insulation plate has multiple evenly distributed notches (I). The outer heat insulation plate has a fan-shaped structure with notches (II) on its inner side. Notches (I) and (II) form a channel with the same cross-section as the blade shell membrane. The outer heat insulation plate is detachably installed on the outside of the inner heat insulation plate. This utility model, through the combined design of the inner and outer heat insulation plates and the ingenious cooperation of notches (I) and (II), forms a channel that perfectly fits the cross-section of the blade shell membrane. This design significantly reduces the gap between the blade shell membrane and the heat insulation plate, improves the heat insulation effect, effectively prevents heat exchange at the gap, and achieves a higher and more stable temperature gradient. The detachable connection between the inner and outer heat insulation plates provides convenience for the placement and removal of the blade shell membrane.

The invention provides a control method for chambering steel inclusions. The control method comprises the following steps of converter treatment, LF refining, RH vacuum refining and continuous casting. The mass percentage content of N in the chambering steel is less than or equal to 0.0040%. According to the method, a tapping-argon station-LF furnace three-in-one reduction slagging process is adopted, two-step ferrotitanium alloying is performed, and vacuum pre-calcium treatment is assisted, so that Al2O3 inclusion denaturation is more thorough, and the number of B-class and DS-class inclusions in steel is smaller. According to continuous casting of the method, the cooling strength of the crystallizer is controlled through the high temperature gradient, the temperature gradient of the solidification front edge is improved, and the obtained precipitates are smaller in size. According to the control method for the inclusions of the reaming steel, the number and the size of B-type inclusions such as Al2O3 and Al2O3-MgO, DS-type inclusions such as Al2O3-CaO with the content ratio of Ti2O3-Al2O3-CaS to aluminum and calcium being 0.8-1.5 and TiN-type inclusions are remarkably reduced, and the problem of reaming cracking caused by the inclusions is solved.

An embodiment of the present specification provides a crystal growth apparatus, comprising: a crucible for accommodating a crystal growth raw material; at least part of the seed crystal support can be immersed in a melt formed by the crystal growth raw materials in the crucible; the seed crystal support comprises a seed crystal bonding surface; the supporting structure is connected with one side, opposite to the seed crystal bonding surface, of the seed crystal holder; and the cooling assembly comprises a flow guide structure arranged in the seed crystal support, and the flow guide structure is used for conducting flow guide on the cooling medium, so that the cooling medium cools the bonding surface of the seed crystal. The cooling assembly is arranged to cool the seed crystal bonding surface, so that the radial temperature distribution of the seed crystal bonding surface is more uniform, the temperature near the seed crystal bonding surface is lower, the temperature gradient of the seed crystal bonding surface in the axial direction and other areas of a melt is increased, and the growth rate and quality of crystals are improved.

The utility model discloses a tubular adsorption fixed bed for capturing carbon dioxide, which comprises a barrel and a material tube bundle, and the bottom of the barrel is provided with a discharge port, a gas inlet, a cold medium inlet and a hot medium outlet; a baffling tube plate is arranged at the middle section of the barrel; a hot medium inlet, a cold medium outlet, a gas outlet, a filling opening and a fixed tube plate are arranged at the top of the barrel; the material tube bundle is arranged in the middle of the cylinder body; based on an existing adsorption fixed bed, redesign is carried out, a shell-and-tube structure is adopted, the heat exchange efficiency can be effectively improved, a large temperature gradient cannot be generated, meanwhile, the problems of gas short circuit and non-uniform gas distribution in an adsorption bed layer are effectively solved, and the gas-solid contact efficiency is improved.

The invention discloses a method for removing impurity oxygen in metal cobalt, belongs to the technical field of metal material processing, and solves the problems that oxygen in cobalt is difficult to deeply remove and ultra-high-purity cobalt cannot be obtained in the prior art. The method comprises the following steps: S1, pretreating a metal cobalt raw material to obtain clean to-be-treated metal cobalt; s2, the to-be-treated metal cobalt is subjected to vacuum electron beam melting, and a metal cobalt cast ingot is obtained; wherein hydrogen is introduced in the vacuum electron beam smelting process, so that the hydrogen and hydrogen atoms formed by electron beam ionization react with oxygen on the surfaces of metal cobalt molten drops formed by smelting, and a metal cobalt cast ingot with the low oxygen content is obtained through smelting. According to the method, the oxygen in the metal cobalt is removed by combining the electron beam drop melting technology with hydrogen reduction, the driving force for removing the oxygen in the molten drops is increased, and therefore deep removal of the impurity oxygen in the metal cobalt is achieved.

The present invention belongs to the technical field of cast iron casting, and discloses a method and application for forming the main lubricating oil channel of a ductile iron diesel engine body. A bottom-pouring open pouring system with a filtering device is used to purify molten iron, and a shrinkage feed riser is set at the hot node of the main lubricating oil channel and a chiller is used in combination to balance the temperature field of ductile iron. The chemical composition before the furnace is determined according to the principles of high carbon equivalent and high carbon and low silicon, reasonable packaging, multi-stage inoculation, controlled time, good spheroidization, thorough slag removal, and rapid pouring parameters to achieve internal densification of thick and large hot nodes and eliminate shrinkage and slag inclusions in the main lubricating oil channel of the engine body. The present invention is conducive to achieving basic balance of the temperature field of ductile iron. The present invention ensures that the molten iron has high quality, achieves internal densification of thick and large hot nodes, eliminates the quality risk of shrinkage and slag inclusion defects in the main lubricating oil channel of the engine body, and solves the shrinkage casting defects of the main lubricating oil channel of a complex ductile iron engine body.

All season self-regulating air closed loop enclosure wall, cover high quantitative configuration method and air flow regulation method. At present, there is a lack of related processing measures which can utilize external temperature to regulate indoor temperature and air flow direction in real time. The all season self-regulating air closed loop enclosure wall in the application comprises an outer light condensing cover body and a main wall body, the outer light condensing cover body is arranged outside the main wall body, a front receiving cavity is formed between the inner wall of the outer light condensing cover body and the outer wall of the main wall body, a light absorbing layer and a reflective coating are vertically arranged on the outer wall of the main wall body from top to bottom, the light absorbing layer and the reflective coating are both arranged towards the outer light condensing cover body, at least one upper air flow communication hole is processed on the top of the main wall body and communicates with the front receiving cavity, and at least one lower air flow communication hole is processed on the bottom of the main wall body and communicates with the front receiving cavity.

The invention discloses a manufacturing method of a 60AT1-60kg / m forged alloy steel special-shaped steel rail and the special-shaped steel rail, the method comprises the following steps: heating: heating to 600-650 DEG C at a first heating speed, preserving heat for a first time, heating to 900-920 DEG C at a second heating speed, and preserving heat for a second time; cooling: cooling to 800 DEG C or below at a first air spraying pressure and a first cooling speed, cooling to 250-300 DEG C at a second air spraying pressure and a second cooling speed, and cooling to 200 DEG C or below at a third air spraying pressure and a third cooling speed; in the first stage, the temperature is increased to 200-240 DEG C, and heat preservation is conducted for third time; and in the second stage, the temperature is increased to 260-280 DEG C, heat preservation is conducted for the fourth time, and finally air cooling is conducted to the room temperature. The heat-affected softening area of the forged and pressed part of the heel end of the special-shaped rail is small in width, only 2-3 soft spots with the surface hardness lower than 380 HB are arranged, and the width is only about 30 mm.

A stepped main heater for a single crystal furnace comprises a plurality of heating assemblies distributed in the circumferential direction of the single crystal furnace, gaps exist between the adjacent heating assemblies, a heating space is defined by all the heating assemblies, and each heating assembly comprises an upper heating plate and a lower heating plate which are distributed up and down. The upper heating plate and the lower heating plate are fixedly connected through at least one transition heating plate, all the transition heating plates surround to form a transition heating area, the space of the transition heating area is gradually reduced from top to bottom to form a stepped transition heating area, and the structure can be far away from a solid-liquid interface, so that the temperature gradient is more linear. Part of two adjacent lower heating plates are fixedly connected through a bottom heating plate, and the bottom heating plate extends towards the heating space. The temperature of the bottom of the molten silicon is improved, so that the temperature difference between the upper part and the lower part of the molten silicon can be improved, the temperature gradient in the whole molten silicon is remarkably improved, and the crystal defect caused by insufficient temperature gradient in the drawing process is reduced.

The invention discloses a method for eliminating stripe crystal defects of a single-crystal high-temperature alloy casting. The method comprises the steps that S1, the initial position of the stripe crystal defects is determined; s2, preparing a single-crystal high-temperature alloy casting; wherein in the step S2, when the initial position of the stripe crystal defect on the single-crystal high-temperature alloy casting passes through the thermal radiation baffle between the heating area and the cooling area, the drawing rate of the casting is reduced. According to the method for eliminating the streak crystal defect of the single-crystal high-temperature alloy casting, the initial position of the streak crystal defect on the single-crystal high-temperature alloy casting is determined firstly, during preparation, when the initial position passes through heat radiation baffles of a heating area and a cooling area, the drawing rate is reduced, the temperature gradient can be increased, and the width of a paste area can be reduced; and therefore, the stability of the liquid phase in the pasty area is improved, generation of striped crystals is effectively inhibited, and the single-crystal high-temperature alloy casting without striped crystal defects is prepared.

This invention discloses a stepwise thermal control method for improving the process and performance of laser additive manufacturing of nickel-based superalloys. It is based on a dual-laser additive manufacturing process, which includes a first laser and a second laser beam. During the printing process, for each printed layer, the first laser beam is first applied at 20 J / mm². 3 -40 J / mm 3 A low-energy-density laser preheats and partially melts the alloy powder layer on the substrate to optimize its adhesion and improve its stability. A second laser beam at 70 J / mm² is then used. 3 -110 J / mm 3 The high unit volume laser energy density completely melts the alloy powder layer; the alloy powder layer uses nickel-based high-temperature alloy powder. Therefore, this invention can suppress the burn-off of key elements (such as Al, Cr, Nb, etc.) in the alloy powder layer during the melting stage, achieving precise control of component composition and improving surface quality and dimensional accuracy.

The invention discloses a honeycomb-shaped flexible thermoelectric power generation sheet. A plurality of hexagonal holes are distributed in a flexible substrate of the thermoelectric power generation sheet at intervals; at least one N / P type thermoelectric semiconductor is fixedly mounted in each hexagonal hole; the cold end of the N / P type thermoelectric semiconductor is flush with the upper end face of the flexible substrate, and the hot end is flush with the lower end face of the flexible substrate. Each hexagonal hole and an N / P type thermoelectric semiconductor arranged in the hexagonal hole form a honeycomb structure; the N / P type thermoelectric semiconductors are sequentially connected in series according to the N-P-N-P sequence, the two hot ends are connected through a conducting strip, and the two cold ends are connected through a wire. The conducting strip is formed by solidifying a conducting solution. The honeycomb-shaped flexible thermoelectric power generation sheet is inspired by a natural honeycomb-shaped structure, adopts a structure that the N / P type thermoelectric semiconductor is wrapped in the flexible substrate, provides stronger flexibility through the flexible substrate, has the power generation advantage of a rigid semiconductor, and realizes efficient capture of heat energy in the environment.

The invention provides a microfluidic device capable of sorting circulating tumor cells and enriching cell exosomes. The device comprises a fixed plate, a first sorting module used for separating cells from cell exosomes, an enrichment module used for enriching the cell exosomes and a second sorting module used for sorting normal blood cells and circulating tumor cells are arranged in the fixed plate, an inlet of the enrichment module is communicated with an exosome outlet of the first sorting module, and an outlet of the enrichment module is communicated with an exosome outlet of the second sorting module. The inlet of the second sorting module is communicated with the cell outlet of the first sorting module, and the inlet of the sorting module is also provided with a sheath fluid input module for inputting sheath fluid into the second sorting module. According to the microfluidic device capable of sorting the circulating tumor cells and enriching the exosomes in the cells, the separation of the cells and the exosomes is realized by utilizing cooperative Dean flow microfluidic inertial sorting, and then the efficient enrichment of the exosomes is realized by utilizing a pit-assisted thermal field; and meanwhile, a deterministic lateral displacement technology (DLD) is combined with an insulation dielectrophoresis technology (i DEP) to realize separation of tumor cells and normal cells.