49results about How to "Control pressure stability" patented technology

The subject invention reveals an air spring arrangement comprising: a first mounting member, a second mounting member, an air spring volume, a height sensor, a controllable valve, a position controllable drive, wherein the first mounting member and the second mounting member are arranged so as to mount the air spring volume to corresponding vehicle members, wherein the height sensor is arranged so as to sense a distance between the first mounting member and the second mounting member, wherein the controllable valve is arranged so as to connect the inside of the air spring volume with the outside of the air spring volume, wherein the position controllable drive is arranged so as to drive the controllable valve with respect to an opening grade of the controllable valve, and wherein the position controllable drive is controlled based on the sensed distance between the first mounting member and the second mounting member.

The present invention is a pressure feedback control parameter self-tuning method of a variable thrust engine. After real-time collection of the pressure of the combustion chamber of the solid rocket motor by the pressure sensor, the appropriate control is given according to the deviation between the measured pressure and the target pressure through the feedback comparison link. Output, so that the working pressure of the engine combustion chamber can be stabilized near the target pressure or follow the change of the target pressure, and the combustion state of the solid propellant can be controlled by controlling the working pressure of the engine, so as to realize engine thrust regulation and system energy management. The pressure change of the solid engine is affected by the coupling of multiple factors such as throat area, charge burning rate, and charge burning surface. The pressure feedback control system is a complex nonlinear time-varying system, and the pressure control parameters are related to the system state in real time. The patent of the present invention proposes a variable thrust engine feedback control parameter self-adjustment method, which can effectively realize the pressure stability control of the solid engine, and it has been verified that the pressure control deviation is less than 2%.

The invention discloses a residual iron hole plugging device which comprises a body frame, a mud making barrel, a pressure keeping air cylinder and a mud making air cylinder. The mud making barrel isarranged in the body frame and can move front and back relative to the body frame. A mud making disc is arranged in the mud making barrel, the mud making disc is fixed to the end part of a piston rodof the mud making air cylinder, a cylinder body of the mud making air cylinder is fixed in the body frame, and the mud making air cylinder can drive the mud making disc to move relative to the mud making barrel; and a cylinder body of the pressure keeping air cylinder is fixedly connected to the body frame, a piston rod of the pressure keeping air cylinder is fixedly connected to the mud making barrel, and the pressure keeping air cylinder can drive the mud making barrel to move front and back relative to the body frame. The residual iron hole plugging device disclosed by the invention is simple to operate, saves time and reduces the labor intensity and the operational safety risk.

The invention discloses an automatic constant temperature and pressure device in a gas environment, which includes a high temperature acquisition structure, a constant pressure structure, and a product collection structure. The high temperature acquisition structure includes a reactor, a constant temperature control cabinet installed on the reactor, and a The reactor brackets at both ends of the reactor; the constant pressure structure includes: a constant pressure control cabinet, the first constant pressure fitting, and the second constant pressure fitting; the product collection structure includes: a condenser, a gas-liquid separation tank, and an exhaust gas treatment device. One end of the tank is connected to the second constant pressure fitting, and the other end is connected to the gas-liquid separation tank; one end of the gas-liquid separation tank is connected to the condenser, and the upper wall of the other end is connected to the tail gas treatment device; the tail gas treatment device is connected through a three-way pipe joint There are exhaust ports and gas collection ports. The invention realizes the constant temperature and constant pressure adjustment of the reaction system, and the reaction tail gas is discharged and collected after purification treatment, the reaction temperature and pressure are controlled stably, manpower and material resources are saved, the safety factor is high, and the production efficiency is improved.

The invention discloses a tail gas treatment device used for providing solid fuel conveying air. The tail gas treatment device comprises a tail gas adjusting room, a tail gas input pipeline, an air supplementing pipeline and a conveying air pipeline outlet, wherein the tail gas adjusting room comprises a conveying air automatic temperature adjustment control system and a pressure automatic adjustment control system. The conveying air automatic temperature adjustment control system comprises a temperature detection device, a temperature adjustment device and a temperature controller; the pressure automatic adjustment control system comprises a pressure detection device, a pressure adjustment device and a pressure controller. With the tail gas treatment device, constant-temperature and constant-pressure control over conveying air is realized, the stability of the conveying air is guaranteed sufficiently, volume changes caused by temperature fluctuation are prevented from generating negative effects on the stability of gas and solid two-phase flows, and the tail gas treatment device is suitable for a high-temperature industrial boiler with petroleum coke powder or pulverized coal or other solid fuel being fuel and particularly suitable for a high-temperature industrial boiler combusting pure oxygen-solid fuel, and can be applied to the manufacturing fields of glass, metallurgy, cement, ceramic and others.

The present invention relates to a method for producing alpha olefins by oligomerization of ethylene. The method a) provides a reaction device in which an external vessel is connected to a loop reactor, wherein a liquid distributor is provided on the top of the external vessel, and the liquid distributor It has the effect of dispersing the liquid; b) pre-dissolving the catalyst components in the reaction solvent, and then continuously introducing the catalyst solution into the loop reactor; c) continuously introducing a part of the pressurized ethylene monomer into the After pre-dissolving in the external container containing the reaction solvent, the reaction solvent dissolved in the ethylene monomer is continuously passed into the loop reactor from the external container; the other part of the pressurized ethylene monomer is directly passed into the container. In a loop reactor with a reaction solvent; d) In the loop reactor, the ethylene monomer is continuously oligomerized under the action of a catalyst, and the alpha olefin obtained by the reaction is dissolved in the reaction solvent and passed through the loop reactor. outflow.