32results about How to "Reduce flow pressure loss" patented technology

It is disclosed that a power steering pump. Which is characterized in that the front oil distributing plate is enclosed with front wall of the inner cavity of the pump body to form a front outlet cavity, a valve bore being formed at outer circumference side of the inner cavity of the pump body communicates with the front outlet cavity, a flow securing control valve is disposed within the valve bore, the front outlet cavity communicates with an oil outlet hole at the front portion of pump body through a high-pressure oil passage. The invention adopts a front high-pressure cavity configuration of the pump body to shorten the length of high-pressure oil passage, which hence avoids steering pump failure caused by aggressive overheating generated in the traditional configuration with excessive length of the flow passage and bending.

Disclosed is a streamline amplitude-variable folded-line-shaped corrugated fin of a round tube fin type heat exchanger. According to the needs for expanding the fin surface and guiding fluid to flow, a streamline protrusive corrugation 4 and a recessed corrugation 5 with full sections shaped in folded lines are extruded from an air inlet and an air outlet in a fin. Connection lines among same troughs and crests are folded lines. The streamlines are streamlines without backflow at the tube tails, along an axial central section of a tube, of a lateral passage of a tube fin type heat exchanger plain fin which corresponds to a fin 1. The protrusive corrugation 4 and the recessed corrugation 5 vary along longitudinal amplitude in an appropriate waveform 16, and the amplitude varies transversely in a form of fitting an enveloped corrugation crest of a waveform 17. The streamline folded-line-shaped corrugated fin has the advantages that flowing streamline performance of the fluid can be improved effectively, flowing resistance is reduced, superficial area of the fin is enlarged by the protrusive / recessed corrugations on the fin surface, heat transmission resistance is reduced, and integral heat exchanging performance of the fin is improved.

Disclosed is a streamline variable-amplitude arc-shaped wavy fin for round tube fin heat exchanger. According to needs of surfaces of extending fins and fluid flow guiding, streamline convex waves 4 and streamline concave waves 5 with integral cross sections in sine / cosine shapes are formed through extrusion on the fins from an air flow inlet to an outlet. Connection lines of the same wave troughs and wave crests are all streamlines. The streamlines are streamlines which enable backflow at tube ends to be avoided in a direction from the tube axis to central cross section in a side channel of a tube fin heat exchanger plate fin corresponding to the fins 1. The streamline convex waves 4 and the streamline concave waves 5 vary according to a needed waveform 16 along longitudinal wave amplitudes, and the wave amplitudes vary in a mode of a needed waveform 17 enveloping wave troughs and crests. The streamline arc-shaped wavy fin can effectively improve streamline of liquid flow, and reduces flow resistance; the convex / concave waves on the surface of the fin increase surface areas of the fin, therefore, the flow resistance is reduced and heat exchange capability of the fin is improved.

Provided is a streamlined variable amplitude parabolic corrugated fin of an oval tube fin heat exchanger. According to the needs for expanding the surface of the fin and guiding fluid to flow, streamlined convex ripples 4 and streamlined concave ripples 5 are extruded out on the fin from an airflow inlet to an airflow outlet, and the complete cross sections of the convex ripples 4 and the concave ripples 5 are parabolic. The connecting line of the same trough and the connecting line of the same wave peak are streamlines. According to the streamlines, backflow does not happen to a tube tail of a plain fin side channel of the tube fin heat exchanger corresponding to the fin 1 along the tube axial center section. The amplitude of the convex ripples 4 and the concave ripples 5 in the longitudinal direction needs the change of a waveform 14, and the amplitude in the transverse direction needs the change of an envelope ripple trough and peak of a waveform 15. The parabolic streamlined corrugated fin can effectively improve the streamline performance of flowing of fluid, flowing resistance is reduced, the area of the surface of the fin is increased through the convex / concave ripples on the surface of the fin, heat transfer resistance is reduced, and the overall heat exchange capacity of the fin is improved.

Disclosed is a streamline variable-amplitude wavy fin for a round tube fin heat exchanger. Streamline convex waves 4 and streamline concave waves 5 which are arranged in a convex-concave interval mode are continuously stamped on fins 1 from an air flow inlet to an outlet according to streamline trends. Connection lines of the same wave troughs and wave crests are all streamlines. Wave amplitudes vary according to the needed waveform in a longitudinal direction. The amplitudes of transverse different waves vary in a mode of a needed waveform enveloping wave troughs and crests. The largest amplitude of convex waves 4 and concave waves 5 is 0.1-0.9 time the interval of the fins. The cross sections of the waves can be of any needed shape. The streamlines are streamlines which enable backflow at tube ends to be avoided in a direction from the tube axis to central cross section in a side channel of a tube fin heat exchanger plate fin corresponding to the fins 1. When liquid flows between the streamline wavy fins, part of the liquid flows in streamline channels formed by the convex waves and the concave waves, transverse changes and changes along the streamlines of the wave amplitudes reduce wall shear stress of flowing and pressure loss of flowing can be evidently reduced.

The invention discloses a deformation-resistant and pressure-resistant equal temperature plate, which comprises an upper cover plate, a lower cover plate and a supporting structure. The combination of the upper cover plate and the lower cover plate forms a closed accommodating space, and the supporting structure is located in the accommodating space. The support structure is composed of support columns whose cross-sectional size obeys the characteristics of fractal Brownian motion; the lower cover plate includes a heat-conducting substrate, an upper channel inlet plate and a lower channel outlet plate, and a condensing medium input port is arranged on the upper channel inlet plate. A condensing medium output port is set on the outlet plate of the lower channel, an upper flow channel is set on the inner side of the upper surface of the heat conduction substrate, and a lower flow channel is set on the inner side of the lower surface of the heat conduction substrate, both the upper flow channel and the lower flow channel are graded flow channels The network, the upper flow channel and the lower flow channel are connected through the upper and lower vertical channels arranged at the end of the final channel of the hierarchical flow channel network. The uniform temperature plate of the invention has strong deformation resistance and pressure resistance, high heat transfer efficiency, and the temperature on the surface of the lower cover plate of the uniform temperature plate is more uniform.