Please select the most similar patent number from A, B, C and D. Which number is?
An integrated online measurement system for thermophysical property parameters of nanofluid cutting liquid, consisting of a gas path system, a liquid path system, a nanofluid heat conductivity coefficient measuring device, a nanofluid cutting liquid convective heat transfer coefficient and fluid/workpiece energy ratio coefficient measuring device, and a grinding force and grinding temperature measuring device or a milling force and milling temperature measuring device. The nanofluid heat conductivity coefficient measuring device is located in the liquid path system; the guras path system provides presse for nanofluid in the liquid path system, and two nozzles are led out from the liquid path system; the nanofluid spray ejected by the nozzle I is sprayed onto the surface of a workpiece I, so as to form the nanofluid cutting liquid convective heat transfer coefficient and fluid/workpiece energy ratio coefficient measuring device; and the nanofluid spray ejected by the nozzle II is sprayed onto the surface of a workpiece II, so as to form the grinding force and grinding temperature measuring device.
A: Provided is a heat transfer coefficient measurement device, comprising a test chamber (9), a hot-end heating system (10), a cold-end cooling system (14), an evacuation system (12), a temperature acquisition system and processing system (13), and a pressure control system (11); a test bench (15) is arranged inside the test chamber (9), the test bench (15) being an overall upper and lower structure: in sequence from bottom to top are a heating block (8), a lower pressure head (7), a sample to be tested (5), an upper pressure head (2), and a cooling block (1). A temperature-measurement-point horizontal multipoint arrangement simulates the horizontal temperature gradient of the tested sample, so as to objectively reflect the heat transfer attributes of the tested sample, and with the aid of data processing, obtain a more objective heat transfer coefficient value. At the same time, a flexible thin sheet (16) having a high thermal conductivity is arranged between the sample to be tested (5) and the pressure heads (7, 2), reducing thermal contact resistance and improving the accuracy of test values. Moreover, a limiting ring (4) is arranged between the pressure heads so as to ensure testing operability and precision when testing flexible samples. The accuracy and objectivity of heat transfer coefficient testing is significantly improved.
B: A minimal quantity lubrication grinding device capable of controllably transporting a nanoparticle jet flow under a magnetically enhanced electric field. The charge quantity of liquid drops is increased through the addition of a magnetic field at the periphery of a corona zone. The minimal quantity lubrication grinding device comprises a spray nozzle which is externally provided with a high-voltage direct current electrostatic generator and a magnetic field forming device; the spray nozzle is connected with a nanoparticle liquid supply system and a gas supply system; the high-voltage direct current electrostatic generator is connected with the negative pole of an adjustable high-voltage direct current power supply, while the positive pole of the adjustable high-voltage direct current power supply is connected with a workpiece power-up device which is used for being attached to a non-machined surface of a workpiece, and consequently the form of negative corona discharge is created; the magnetic field forming device is arranged at the periphery of the corona zone with electrostatic discharge; and a nanofluid grinding liquid is sprayed out of a spray head of the spray nozzle and atomized into liquid drops, which at the same time are charged under the action of the high-voltage direct current electrostatic generator and the magnetic field forming device and then fed into a grinding area.
C: Disclosed is a multi-angle two-dimensional ultrasonic vibration assisted grinding device of a nano-fluid minimum quantity lubrication type, comprising components, such as a workpiece clamp (I-9) for clamping a workpiece (I-12), a grinding wheel (II-3) for grinding the workpiece, a two-dimensional ultrasonic vibration device connected to the workpiece clamp, and a nozzle (II-6) arranged on one side of the grinding wheel and used for spraying a nano-fluid at the workpiece. The device can improve the processing quality of workpieces and prevent thermal damage to the workpieces.
D: A preparation method for a perfluorotriethylamine group-based highly thermally conductive and lubricating nanofluid, belonging to the field of composite liquid working medium preparation for fluid circuit systems for spacecrafts. The preparation of a fluorinated graphene-perfluorotriethylamine group nanofluid realizes efficient heat exchange and effective lubrication of a fluid circuit system. The present invention successfully prepares multi-layer fluorinated graphene by fluorinating graphene oxide by means of the hydrothermal method and using hydrofluoric acid as a fluorinating reagent, the experimental apparatus being simple, and the preparation process being easy to operate. Furthermore, the fluorine content in the surface of the graphene can be adjusted controllably. The fluorinated graphene has good dispersibility in the perfluorotriethylamine working medium, and as no dispersant is required, the thermal resistance of the heat transfer interface can be reduced and the thermal conductivity of the nanofluid can be significantly improved. Fluorine atoms are inserted between layers of the graphene, increasing spacing between the layers, reducing the force between the layers; moreover, the strong repulsive force between the fluorine atoms facilitates sliding between the layers, significantly improving the abrasion-reduction and lubrication performance of the nanofluids.
Answer: A