31results about How to "No air resistance" patented technology

The invention discloses a piezoelectric microphone with high sensitivity as well as a production method. The piezoelectric microphone comprises a base provided with a cavity and a piezoelectric stacking structure arranged on the base, the cavity in the base is a vacuum vibration cavity, the piezoelectric stacking structure sequentially comprises a bottom electrode, a piezoelectric film and a top electrode, and the base comprises a base bottom layer, a base intermediate layer and a base top layer. The production method comprises the following steps: firstly etching the cavity in the base bottomlayer, then depositing the base intermediate layer, then bonding the base top layer on the base intermediate layer in a vacuum environment, so as to form a vibration cavity, then etching an annular groove on the base top layer, depositing a sacrificial layer in the annular groove, then sequentially depositing the bottom electrode, the piezoelectric film and the top electrode on the base top layer, forming a corrosion hole in the top electrode, and corroding off the sacrificial layer, so that production of the piezoelectric microphone is completed. The piezoelectric microphone disclosed by theinvention can guarantee a vacuum state inside the cavity, air resistance does not exist, strain stress of the piezoelectric film is greatly improved, and a stronger electrical signal is output.

The invention relates to an energy-saving electric pump, which is characterized in that the energy-saving electric pump comprises a base, a check valve, a suction inlet, a pump, a guide bearing seat, an inner oil suction hood, an outer oil suction hood, a motor, a flange body and a joint; the inlet of a main flow passage, the suction inlet, the pump, the flow passage of the guide bearing seat, a flow passage between the shell of the motor and the inner wall of the inner oil suction hood, the flow passage of the flange body and the inner flow passage of the joint form the main flow passage; and the inlet of a bypass large flow passage, a flow passage formed by the check valve and the base, an annular flow passage formed between the inner oil suction hood and the outer oil suction hood and the side flow passage of the joint form the bypass large flow passage. The working method of the energy-saving electric pump is characterized in that: during unloading, oil firstly enters the main flow passage of the energy-saving electric pump, then the check valve is opened, the oil enters the bypass large flow passage and the two flow passages deliver the oil; and during loading, a filling accessory opens the check valve and the two flow passages deliver the oil. The energy-saving electric pump has the advantage that the air resistance in an oil delivery pipe is thoroughly eliminated because a suction system is changed to work in a positive-pressure oil delivery mode instead of the original negative-pressure oil suction mode.

The invention relates to the fields of sterilization and antibacterial, in particular to a bactericide and a preparation method thereof, as well as an air filter, a mask, modified latex paint and modified concrete. The fungicide of the present invention comprises the following components in parts by weight: 0.1 to 1 part of graphene, 5 to 15 parts of photocatalyst, 0.1 to 1 part of airgel, 60 to 80 parts of resin, 0.1 to 1 part of silver ion and copper 2 to 5 parts of ions. Through the cooperation of graphene, photocatalyst, aerogel, resin, silver ions, and copper ions, the components synergistically play the role of antibacterial and bactericidal, and have the characteristics of high efficiency and long-lasting. The bactericide of the present invention is applied to the air filter and can improve the bactericidal effect of the filter, and the mask prepared by the air filter has no air resistance, and the sterilizing effect is efficient and durable; Abrasion resistance; the application of the fungicide of the present invention to concrete can enhance the impermeability of the concrete.

The invention relates to an alcohol ether fuel and a preparation method thereof. The alcohol ether fuel comprises the following raw components in percentage by weight: 10 to 15% of olefin, 3 to 5% of fatty alcohol-polyoxyethylene ether, 3 to 5% of methyl tertiary butyl ether, 2 to 5% of tert butyl alcohol, 2 to 5% of isopropanol, 2 to 5% of diethyl ether, 2 to 5% of alkylphenol ethoxylates, 0.5 to 2% of 2, 6-butylated hydroxytoluene, 3 to 8% of petroleum ether, 0.5% of alkylamine, 0.5% of dispersing agent, 0.5% of metal passivating deactivator, 1 to 5% of isopropyl ether, 0.5 to 3% of aliphatic ketone, 0.5 to 3% of aliphatic ether, 0.3 to 2% of metal salt, 0.2 to 1.5% of ferrocene, and the balance of methanol. The finished alcohol ether fuel prepared by the preparation method can be directly added to an oil tank to replace gasoline, has the oil consumption basically the same as that of the gasoline and not causes any damage to an engine.

The present invention proposes a waste heat recovery method of continuous casting machine, which is used to solve the problems of high operating pressure caused by direct heating of soft water in the prior art, great damage to equipment and low quality of water vapor obtained, which cannot be effectively converted and utilized. The heat conduction medium captures and absorbs the heat from the continuous casting machine site, and then exchanges heat between water and high-temperature non-water heat conduction medium, and finally obtains high-temperature and high-pressure water vapor that can be converted and utilized. In addition, a continuous casting machine waste heat recovery system is also proposed, including the following devices: heat collection device, boiler heat exchange device, water storage heat storage device and application system, boiler heat exchange device includes heat exchange chamber and steam chamber, heat exchange A first heat exchanger is arranged indoors; the heat collection device is connected to the first heat exchanger, and the steam chamber is respectively connected to the water and heat storage device and the application system. This method does not require a soft water preparation device, and the non-water heat-conducting medium does not generate air resistance when it operates at low pressure, and the obtained water vapor is stable and of high quality, which can meet the requirements of power generation.

The invention discloses M85 methanol gasoline for vehicles and a preparation method thereof, belonging to the technical application field of alcohol-based fuels. The M85 methanol gasoline for vehicles includes basic raw materials, auxiliary agents and additives, and the preparation method includes the preparation of additives, the preparation of raw materials and auxiliary agents, and the preparation of M85 methanol gasoline for vehicles. The M85 methanol gasoline for vehicles of the present invention can solve a series of problems such as difficulty in cold start, low calorific value, insufficient power, poor stability, thermal vapor resistance, corrosion and swelling in traditional high-proportion methanol gasoline in low-temperature environments, and meets the national standard GB / T23799 ‑2009 "Methanol Gasoline for Vehicles (M85)", the preparation method is simple, the cost is low, the product performance is excellent, and it can be used directly without modifying the existing engine, and can also be mixed with unleaded gasoline and ethanol gasoline Or used interchangeably, it has good environmental benefits, economic benefits and social benefits.

The invention provides a motor-vehicle brake-fluid composition. The composition comprises: 49 wt%-59 wt% of polyalkylene glycol ether, 40 wt%-50 wt% of polyalkylene glycol ether orthoborate, 0.1 wt%-3.0 wt% of an antioxidant, 0.01 wt%-0.5 wt% of a metal deactivator, 0.1 wt%-3.0 wt% of a corrosion inhibitor, and 0.0005 wt%-0.05 wt% of an anti-foaming agent. The prepared motor-vehicle brake-fluid composition provided by the invention has no vapor lock under a high-temperature condition, and has excellent flowing performance under a low-temperature condition; and all performances of the composition meet or exceed the indexes of GB12981-2021HZY6, and the composition is capable of transmitting brake energy normally under an extremely low-temperature condition.

The invention discloses a metal hose suitable for a central drainage system of an offshore oil field and a preparation method of the metal hose. The metal hose comprises a net body part and connectors located at the two ends of the net body part. The net body part comprises a metal corrugated pipe, a connecting pipe, a ring and a steel wire mesh sleeve. The metal corrugated pipe is prepared from, by weight, 16-35 parts of nickel, 12-18 parts of aluminum, 3-9 parts of brass, 6-11 parts of titanium, 2-7 parts of silver oxide, 1-6 parts of calcium silicate, and 1-4 parts of graphite. Firstly, the metal hose can adapt to various kinds of external force in an oil tank and is convenient to move; secondly, the metal hose is not prone to corrosion in the oil tank and long in service life; and thirdly, air resistance cannot be caused by the metal hose, and drainage is smooth.

The invention provides a dust removing device of a motor sweeper. The dust removing device comprises a motor, a centrifugal fan, a high-pressure spraying nozzle, a rotary brush, a disc-shaped ventilated flow guide plate, a motor bracket and a box body, wherein the motor, the centrifugal fan, the rotary brush and the disc-shaped ventilated flow guide plate are arranged inside the box body; the rotary brush comprises brush wires which outward extend in a radial direction from a rotary shaft of the rotary brush; the disc-shaped ventilated flow guide plate comprises a plurality of ventilation holes. According to the dust removing device disclosed by the invention, automatic separation of ash and gas is realized and the inner devices do not need to be replaced at fixed period, so that the maintenance is easy; the dust removing device is small in air resistance, high in efficiency and long in service life.

The invention discloses a highly clean environmental-protection mixed alcohol gasoline, and its components in weight percent: gasoline 50-60%, methanol 35-47%, isobutyl alcohol 2-3.5%, and tert.-butyl alcohol 1-3.5%. Its components in weight percent: gasoline 55-60%, methanol 35-41%, isobutyl alcohol 3-3.5%, and tert.-butyl alcohol 1-3.5%. The gasoline is straight-run gasoline; it fully mixes the above components uniformly to obtain the product; it can convert burning carbons to CO and H2, make the fuel fully burn and reduce harmful gas discharge of automobile tail gas by 90% about.