46results about How to "Overcome flow resistance" patented technology

The invention relates to a non-resistance pressure balance anti-resistance device of heat pump of ground water, and relative system, wherein the outer frame (1) of anti-resistance device has external water inlet (6) and external water outlet (7); the rotation filter cylinder (3) is inside the outer frame (1); the rotation filter cylinder (3) is divided into internal water inlet area (4-1) and internal water outlet area (4-2); the internal water inlet area (4-1) is connected to the internal water inlet area outlet (8) and the internal water outlet area (4-2) is connected to the internal water outlet area inlet (9). The invention has stable water pressure and stable flux, with small size and low cost.

The invention relates to a solenoid valve, in particular for controlling a brake pressure of a wheel brake of a motor vehicle, comprising an axially moveably mounted armature, wherein one end of the armature is associated with a pole core and a valve sealing element is arranged at another end of the armature, wherein the armature has an axial through-opening, wherein a closure element is force-lockingly and / or interlockingly retained in the axial through-opening in a selectable position, and a plunger is axially moveably mounted in the axial through-opening, which provides a connection to thepole core in an installation position, wherein a pressure spring is positioned in the axial through-opening, wherein the pressure spring is retained in a pretensioned manner between the plunger and the closure element, characterised in that the closure element is designed as a three-dimensionally convex element.

The invention discloses a preparation method of a stable-state chlorine dioxide solution of a food additive. The method comprises the following steps of: (1) preparing a sodium chlorate aqueous solution, extracting the sodium chlorate aqueous solution into a reaction kettle which is provided with an opening tube by using a water jet vacuum system, and heating to 50 to 60 DEG C; (2) diluting a concentrated sulphuric acid, mixing the concentrated sulphuric acid and methanol into a sulphuric acid methanol solution, and adding the sulphuric acid methanol solution into the reaction kettle in the step (1) for reaction; (3) supplying power by using the water jet vacuum system, cooling chlorine dioxide gas which is generated by the reaction in the step (2) by using a water cooler, and then carrying out further separation and purification in a gas liquid separator; and (4) preparing an absorption solution by adding water into the sodium carbonate of the food additive, sodium hydroxide and hydrogen peroxide, and absorbing the chlorine dioxide gas which is obtained in the step (3) by the absorption solution by using a two-stage absorption tower. The method has the advantages that: the process is feasible, short in flow, simple in operation, low in energy consumption and applicable to preparation of the stable-state chlorine dioxide solution of the food additive which meets an international standard under the conditions of all scales.

A mixed flow fan, including a motor, casing, impeller, guide vanes and a current collector; guide vanes are coaxially fixed on the inner side of one end of the casing, and the motor is arranged at the center of the hub of the guide vanes; the output shaft of the motor is fixedly connected to the hub of the impeller center; the inner side of the other end of the casing is provided with a current collector, the current collector is on the same side as the impeller; the diameter of the hub of the guide vane is the same as that of the impeller; A section of convex arc is tangent to ensure that the angle between the inlet and outlet and the rotating shaft is zero, and at the same time, it can ensure that the impeller inlet and outlet have a large diameter difference, and make full use of the centrifugal force to increase the airflow pressure. With this design, the volume of the non-working area is reduced, the airflow enters the axial direction, obtains energy in the impeller, and changes from oblique upward flow to axial flow, and then in the guide vane, part of the kinetic energy of the airflow is converted into Pressure energy, increase the airflow pressure.

A lithium bromide absorption refrigerator of hot water type between single effect and double-stage is prepared as arranging the first and the second high pressure generator as well as condenser unitedly in the same shell being set at top of machine set; arranging medium pressure generator and absorber unitedly in the same shell being set at second layer of machine set; arranging high temperature solution heat exchanger in three streams type at the third layer; arranging low pressure absorber and evaporator unitedly in the same shell being set at fourth layer of machine set and arranging low temperature solution heat exchanger, solution pump and refrigerant pump at bottom layer of machine set.