10 results about "Membrane flow" patented technology

The invention discloses a high-speed airflow shear liquid film flow slippage boundary condition construction method and device, equipment and a medium, and relates to the technical field of fluid mechanics, and the method comprises the steps: constructing a liquid film flow N-S equation, a liquid film interface kinematics boundary equation and an interface stress balance equation of a target high-speed aircraft under high-speed airflow; carrying out dimension reduction simplification by utilizing a lubrication approximation method and the temperature change of the target high-speed aircraft under the high-speed airflow so as to obtain a target simplified equation; carrying out numerical simulation on the target high-speed aircraft under the high-speed airflow to drive a liquid film to move by airflow shear force based on the target simplified equation so as to obtain liquid film displacement data of the target high-speed aircraft under the high-speed airflow; and fitting the liquid film displacement data with an airflow shear force of the target high-speed aircraft under the high-speed airflow to obtain a target slippage boundary condition corresponding to liquid film flowing when the high-speed airflow shears the liquid film. Therefore, the development efficiency of the aircraft can be improved.

Described is an ejector-type vacuum pump assembly that includes a stabilizing membrane flow valve, wherein a pilot flow of pressurized air is used to regulate a main flow of pressurized air for driving an ejector-type vacuum pump is disclosed. The pilot flow is led to a downstream side of the membrane flow valve and is fed to the ejector of the ejector-type vacuum pump along with the main flow of pressurised air. The ejector-type vacuum pump assembly is primarily intended for automated gripping operations using a suction gripper. Also disclosed is a method of controlling a vacuum level in a vacuum chamber of an ejector-type vacuum pump in an ejector-type vacuum pump assembly as described herein.

Disclosed is an ejector-type vacuum pump assembly comprising a stabilized membrane flow valve, wherein a pilot flow of pressurized air is used to regulate the main flow of pressurized air for driving the ejector-type vacuum pump. [Solution] A pilot flow is guided downstream of a membrane flow valve and supplied to the ejector of an ejector-type vacuum pump along with the main stream of pressurized air. The ejector-type vacuum pump assembly is primarily intended for automatic gripping operations using a suction gripping unit. Also disclosed are a flow control unit for controllably releasing the flow of pressurized air supplied to the ejector-type vacuum pump within the ejector-type vacuum pump assembly, and a method for controlling the vacuum level in the vacuum chamber of the ejector-type vacuum pump within the ejector-type vacuum pump assembly described herein.

The application discloses a method and device for constructing a high-speed airflow shearing liquid membrane flow slip boundary condition, equipment and medium, and relates to the technical field of fluid mechanics, which comprises the following steps: constructing a liquid membrane flow N-S equation, a liquid membrane interface kinematics boundary equation and an interface stress balance equation of a target high-speed aircraft under high-speed airflow, and simplifying the equations by using a lubrication approximation method and temperature variation of the target high-speed aircraft under high-speed airflow to obtain target simplified equations; performing numerical simulation on airflow shearing force driven liquid membrane movement of the target high-speed aircraft under high-speed airflow based on the target simplified equations to obtain liquid membrane displacement data of the target high-speed aircraft under high-speed airflow; and fitting the liquid membrane displacement data with airflow shearing force of the target high-speed aircraft under high-speed airflow to obtain target slip boundary conditions corresponding to liquid membrane flow of the high-speed airflow when shearing the liquid membrane. In this way, the aircraft development efficiency can be improved.

An ejector-type vacuum pump assembly containing a stabilizing membrane flow valve, wherein a pilot flow of pressurized air is used to regulate a main flow of pressurized air for driving an ejector-type vacuum pump is disclosed. The pilot flow is led to a downstream side of the membrane flow valve and is fed to the ejector of the ejector-type vacuum pump along with the main flow of pressurised air. The ejector-type vacuum pump assembly is primarily intended for automated gripping operations using a suction gripper. Also disclosed is a flow control unit for controllably exiting a flow of pressurized air to be fed to an ejector-type vacuum pump in the ejector-type vacuum pump assembly, and a method of controlling a vacuum level in a vacuum chamber of an ejector-type vacuum pump in an ejector-type vacuum pump assembly as described herein.

The utility model belongs to the technical field of brine treatment, and relates to a brine treatment system which comprises a brine refining unit, a filtering unit and an ammonia removal unit, the brine refining unit is communicated with the salt well; the filtering unit comprises a first inorganic membrane, a second inorganic membrane and a third inorganic membrane which are sequentially connected in series in the flowing direction of brine, and the water outlet part of the second inorganic membrane flows back to the water inlet end of the first inorganic membrane; the ammonia removal unit is communicated with the water outlet end of the first inorganic membrane; the water outlet part of the second inorganic membrane flows back to the water inlet end of the first inorganic membrane to dilute brine at the water inlet end of the first inorganic membrane, so that the concentration of the brine at the water inlet end of the first inorganic membrane is reduced, the risk of forming a deposition layer on the surface of the first inorganic membrane is reduced, and the stability and reliability of the brine filtering system are improved; and the brine at the water outlet end of the second inorganic membrane is subjected to secondary filtration through the circulating filtration arrangement that the effluent part of the second inorganic membrane flows back to the first inorganic membrane, so that the resource utilization rate of the brine is increased.

This utility model discloses a reverse osmosis test device for nuclear power industry wastewater, including a main frame consisting of a horizontally arranged chassis and a support. A high-pressure pump is mounted on the chassis, and a reverse osmosis membrane is detachably mounted on the support. The outlet of the high-pressure pump is connected to the inlet of the reverse osmosis membrane via a pipe. The clear water outlet of the reverse osmosis membrane is connected to a pipe, and the high-concentration water outlet of the reverse osmosis membrane flows back to the inlet of the reverse osmosis membrane via a pipe. The reverse osmosis membrane is connected to the pipe via a quick-release connecting device. Roller components are provided at the bottom of the chassis. This utility model allows for the replacement of different models of reverse osmosis membranes, facilitating multiple tests with different models of reverse osmosis membranes based on varying raw water data requirements. Furthermore, the reverse osmosis membrane is easy to install and remove, and the operation is simple.

A jet vacuum pump assembly including a stabilized diaphragm flow valve is disclosed in which a pilot flow of compressed air is used to regulate a main flow of compressed air driving a jet vacuum pump. The pilot air flow is guided to the downstream side of the diaphragm flow valve and is supplied together with the main air flow of compressed air to the ejector of the injection vacuum pump. The jet type vacuum pump assembly is mainly used for automatic grabbing operation through a suction cup type grabber. A method of controlling the degree of vacuum within a vacuum chamber of a jet vacuum pump in a jet vacuum pump assembly disclosed herein is also disclosed.

This utility model relates to the field of fabric rolling machine technology, specifically a fabric rolling machine for processing reverse osmosis membrane flow channel fabric that facilitates roll changing. It includes: a frame, including a support, with a drive motor fixedly connected to the surface of the support, and a rotating shaft fixedly connected to the output shaft of the drive motor; and a roll changing mechanism, including a fixing block fixedly connected to the surface of the rotating shaft. This utility model achieves quick roll changing by using the fixed connections of the fixing block and rubber damping layer, the fixing block and spring, the spring and connecting plate, the connecting plate and insert rod, the connecting plate and pull rod, the insert rod and mounting plate, and the mounting plate and fabric rolling roller. After the drive motor stops, pulling the pull rod moves the insert rod backward, causing the insert rod to detach from the mounting plate, thus allowing the mounting plate and fabric rolling roller to be disassembled from the rotating shaft. This facilitates quick roll changing for the convenience of operators.

Disclosed is an ejector-type vacuum pump assembly comprising a stabilized membrane flow valve, wherein a pilot flow of pressurized air is used to regulate the main flow of pressurized air for driving the ejector-type vacuum pump. [Solution] The pilot flow is guided downstream of the membrane flow valve and supplied to the ejector of the ejector-type vacuum pump along with the main stream of pressurized air. The ejector-type vacuum pump assembly is primarily intended for automatic gripping operations using a suction gripping section. A method for controlling the vacuum level in the vacuum chamber of the ejector-type vacuum pump within the ejector-type vacuum pump assembly described herein is also disclosed.