Abstract

An internal cooling passage structure for rotary engine, which includes a rotary engine body, having a front frame, a mid-frame, a rear frame and a rotor, wherein the rotor has cooling passages beneath the rotor triangular apexes, and both front and rear frames respectively have corresponding openings; a rotor, rotating in the mid-frame, having the core cooling passages in full or partial connection with the openings in both front and rear frames in the engine operation; and a guide vane along the opening edge, wherein external air is guided into the rotor core cooling passages by the guide vane which avoids generating heat vortices and helps to increase the cooling air so as to lower the temperature on the rotor and its assemblies.

IPC Classes  ?

• F03C 2/00 - Rotary-piston engines
• F03C 4/00 - Oscillating-piston engines
• F04C 2/00 - Rotary-piston machines or pumps
• F02B 55/06 - Cooling thereof by air or other gas
• F02B 55/12 - Cooling thereof by air or other gas
• F04C 29/04 - Heating; Cooling; Heat insulation
• F01C 21/06 - Heating; Cooling; Heat insulation
• F01P 1/04 - Arrangements for cooling pistons
• F02B 53/00 - Internal-combustion aspects of rotary-piston or oscillating-piston engines

Abstract

3” approach from difunctional anhydride and trifunctional hydrophilic poly(oxyalkylene)triamine. Various amphiphilic hyperbranched poly(amic acid)s (HBPAAs) with terminal amine functionalities and amic acid structures were prepared through ring-opening polyaddition at room temperature, followed by thermal imidization process for the formation of hyperbranched polyimides (HBPIs), accordingly. The resulting HBPIs were analyzed by GPC, indicating the molecule weights of 5000˜7000 g/mol with a distribution of polydispersity between 2.0 and 3.8. The amine titration for HBPIs indicated the peripheral total-amine contents to be 8.32˜18.32 mequiv/g dependent on compositions.

IPC Classes  ?

• C08K 9/04 - Ingredients treated with organic substances
• C08G 73/10 - Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
• C04B 20/06 - Expanding clay, perlite, vermiculite or like granular materials
• C08G 69/40 - Polyamides containing oxygen in the form of ether groups
• C08K 3/20 - Oxides; Hydroxides
• C08K 9/12 - Adsorbed ingredients

Abstract

A processing method for radar signal with dual pulse repetition frequency, comprising: generating a first transmission signal and a second transmission signal, and perform a transmission process; reflecting a first echo signal and a second echo signal from an object, and converting the first transmission signal and the second transmission signal to a frequency domain information by using 2D (Two Dimension) fast Fourier transform (FFT); and filtering noise in the frequency domain information, and performing a calculation program by using a algorithm to obtain Doppler shift of the object. Thereby, the processing method of the present invention can overcome the bad operation ability of the lower hardware and advance the radar target detection speed restrictions.

IPC Classes  ?

• G01S 13/24 - Systems for measuring distance only using transmission of interrupted, pulse modulated waves using frequency agility of carrier wave
• G01S 13/30 - Systems for measuring distance only using transmission of interrupted, pulse modulated waves using more than one pulse per radar period
• G01S 7/288 - Coherent receivers

Abstract

A contactless volume control device with adjustable gain and multi-output is configured as a contactless structure with a magnetic slider and a plurality of magnet sensors. The magnetic field of the magnetic slider is sensed by the plurality of magnet sensors to generate a plurality of sensed signals, which allows an output module to provide a data table to show the position of the magnetic slider and the corresponding output voltage thereof according to the sensed signals. Furthermore, the output module is capable of storing multiple variable data to produce different outputs so as to achieve the objective of gain adjusting. Additionally, a processing unit built in the output module has a plurality of output ends so as to output multiple signals. And the magnetic slider and the plurality of magnet sensors have advantages of simple structure, easy manufacture and low cost.

IPC Classes  ?

• H03G 3/00 - Gain control in amplifiers or frequency changers
• H03G 3/04 - Manually-operated control in untuned amplifiers
• H03G 3/32 - Automatic control in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level
• H03G 1/00 - CONTROL OF AMPLIFICATION - Details of arrangements for controlling amplification

Abstract

A manufacture method of a three dimensional (3D) braided composite tube with a throat section includes: providing an assembled mandrel comprising an upper mandrel and a lower mandrel, and braiding an 3D braided inner layer on the upper mandrel; winding fiber yarns to form a fiber yarn layer over the 3D braided inner layer; tightening the 3D braided inner layer to the assembled mandrel by an appropriate tension force when winding; and infiltrating resin and increasing temperature to cure the resin for obtaining a composite tube with a narrower throat section. The present invention takes advantage of winding fiber yarn outer layer to keep the radius of the throat of the 3D braided inner layer to meet design requirement. Additionally, the hoop strength of the throat section is increased so that the metal shell can be made thinner to reduce the weight of the rocket nozzle.

IPC Classes  ?

• D04C 3/48 - Auxiliary devices
• D04C 1/00 - Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
• B32B 37/02 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations

Abstract

The present invention relates to a facile method of preparing 1,4-bis(chlorodifluoromethyl)benzene, comprising the steps of: (A) providing a reactant liquid of 1,4-bis(difluoromethyl)benzene; optionally (B) providing a light source for UV radiation; and (C) introducing chlorine gas into the reactant liquid at a temperature of 50-90° C. under a pressure above 1 atm to obtain 1,4-Bis(chlorodifluoromethyl)benzene. The invented facile method can be utilized in a batch process or a continuous process for effective production of 1,4-bis(chlorodifluoromethyl)benzene.

IPC Classes  ?

• C07C 17/14 - Preparation of halogenated hydrocarbons by replacement by halogens of hydrogen atoms in the side-chain of aromatic compounds
• C07C 22/08 - Cyclic compounds containing halogen atoms bound to an acyclic carbon atom having unsaturation in the rings containing six-membered aromatic rings containing fluorine