44results about How to "Avoid uneven flow" patented technology

A cooler for a semiconductor-module includes: a heat sink which has an appearance of a cuboid structure to one side of which a flow rate control plate is fixed; a thermal radiation plate on an outer surface of which semiconductor devices are bonded; and a tray-shaped cooling jacket having: a coolant introduction channel; a coolant extraction channel extending in parallel to the coolant introduction channel; and a cooling channel provided between the coolant introduction and extraction channels. The heat sink is provided in the cooling channel of the cooling jacket so that the flow rate control plate extends in a boundary between the coolant extraction channel and the cooling channel, and channels provided for the heat sink extend orthogonally to the coolant introduction and extraction channels. The thermal radiation plate is fixed so as to close an opening the cooling jacket.

The invention discloses a forced feeding device. The forced feeding device comprises an impeller box, wherein an upper-layer impeller chamber, a lower-layer impeller chamber and a separation plate arranged between the upper-layer impeller chamber and the lower-layer impeller chamber are arranged in the impeller box; the upper-layer impeller chamber is internally provided with a material distribution impeller and the lower-layer impeller chamber comprises a feeding impeller chamber and a quantitative impeller chamber; a crossed part of the feeding impeller chamber and the quantitative impeller chamber is communicated; a feeding impeller is arranged in the feeding impeller chamber; a quantitative impeller is arranged in the quantitative impeller chamber; the rotating direction of the feeding impeller is opposite to the rotating direction of the material distribution impeller. According to the forced feeding device, the quantitative impeller chamber is arranged and surplus materials in the quantitative impeller chamber are added into the feeding impeller chamber again so that the materials flow smoothly in the forced feeding device; a material caking phenomenon is avoided so that the filling stability of the materials is ensured.

A system for catalytically treating a gas stream includes a gas phase reactor containing a catalyst for the treatment of the gas stream in at least one catalyst bed having an upstream end and a downstream end, an axial fan positioned upstream of the at least one catalyst bed and having an impeller for moving the gas stream through the gas phase reactor. The gas flow is modified between the impeller and the gas phase reactor to decrease gas stream velocity and increase gas flow uniformity.

The invention discloses an oscillation suppression and current sharing control method of a 24-pulse wave phase-controlled rectifier power supply. Firstly, four sets of 6-pulse wave rectifier power supplies are centrally processed and time-sharing controlled, and secondly, intelligent band sampling technology and intelligent time-sharing PID control are adopted. technology, time-staggered PID control technology and multi-level PID control technology, the method of centralized processing of the four 6-pulse rectifier power supplies is as follows: given by the upper computer to the given receiving management unit; the feedback and summary of the four rectifier cabinets The feedback information is connected to the sampling management unit, and the sampling management unit centrally manages the sampling; the receiving management unit sends the given to the general adjustment PID unit, and the general adjustment PID unit adjusts according to the overall feedback, and the overall adjustment results are sent to the stand-alone working condition distribution The management unit; the single machine working condition allocation management unit uniformly dispatches and allocates the value that each rectifier cabinet should output according to the working conditions of each single machine. The oscillation suppression and current equalization control method of the 24-pulse phase-controlled rectifier power supply of the present invention avoids the occurrence of oscillation and uneven current.

Provided is a desalting device which includes a tower body and a bulge portion bulging downward therefrom, and which prevents uneven flow and causes no dead space within the tower body. The desalting device includes a tower body having a bulge portion 1b bulging downward at a bottom portion thereof, an ion-exchange resin packed in the tower body, and a plurality of strainers 3 for collecting water being arranged within the bulge portion 1b. The strainers are arranged only in a central region of an inside of the bulge portion excluding an outer peripheral portion of the bulge portion.

The invention relates to a die-casting forming die for a bottom corner of an antenna support. The die-casting forming die comprises an upper die body and a lower die body. Connecting section A grooves are obliquely and symmetrically formed in the four corners of the lower die body, a raised thread connecting hole structure A is arranged at the center of each connecting section A groove, and the two center connecting lines of the diagonal connecting section A grooves and the diagonal lines of the lower die body are overlapped. Connecting bulges are obliquely and symmetrically arranged on the four corners of the upper die body, and the connecting bulges and the connecting section A grooves are matched to form die cavities of the bottom corner of the antenna support. Raised thread connecting structures B are arranged at the centers of the two sides in the diagonal line extending directions of the connecting bulges correspondingly, and the two center connecting lines of the diagonal connecting section bulges and the diagonal lines of the upper die body are overlapped. The die-casting forming die has the advantages that a plurality of products can be produced through the die, thus the production efficiency of the products is improved, meanwhile, the utilization rate of the die is also increased, and the production cost can be reduced greatly; and meanwhile, uniform force-bearing is also guaranteed, and the quality of the products is improved.

The invention discloses a multi-computer parallel constant voltage and current sharing control method for electric ship chargers, which comprises the following steps: obtaining the output voltage and output current of several chargers in the current sampling period and the real-time voltage of the electric ship energy storage components; Calculate the control coefficient of the charger according to the output voltage, output current and real-time voltage of the energy storage component of any charger in the current sampling period; get the output voltage command value of the charger according to the control coefficient, and control the charger according to the output voltage The command value outputs the charging voltage. Also disclosed is a multi-unit parallel constant voltage and current sharing control device for electric ship chargers. By detecting the output voltage and current of several chargers and the battery voltage of the energy storage component of the electric ship, the control coefficient of each charger is obtained, and then the output voltage command value of the charger is adjusted to make the output current of several chargers It tends to the average charging current, avoiding the circulating current and uneven current among several chargers.