The cooler can be mainly divided into three types: tube type, corrugated plate type and air-cooled type. Among them, the tube cooler can be divided into double tube type, vertical type, horizontal type, floating head type, etc. The feature of the tube cooler is that the water used for cooling flows through the tube, while the oil flows from the It flows through the intervals of the tubes, and the flaps set in the middle allow the oil to deflect. The two-pass or even four-pass flow method it uses makes its cooling effect stronger; the corrugated plate cooler can also be divided into herringbone, oblique corrugated, etc. , which mainly uses the contact points arranged by the corrugated structure to allow the fluid to form turbulent flow when the flow rate is not high, which greatly improves the effect of heat dissipation; air-cooled coolers can be divided into indirect type, fixed type, and suspension type It has the characteristics of simple structure, small size, light weight, and convenient use. Next, we will take the shell and tube cooler as an example to explain the working principle of the cooler.

The shell and tube cooler is mainly composed of two parts: the outer shell and the inner cooler body. Among them, the external shell includes a cylinder body, a water diversion cover and a water return cover, on which there are oil inlet pipes, oil outlet pipes, water inlet pipes, and water outlet pipes, and there are installation holes for oil discharge, drainage, exhaust screw plugs, and zinc rods. Even the thermometer interface, etc. The cooler body includes cooler tubes, fixed orifice plates, movable orifice plates, baffles, etc. The two ends of the cooler tube are connected to the fixed and movable orifice plates, and the fixed orifice plate is connected to the flange of the outer body. The movable orifice plate can be freely expanded and contracted in the outer body to eliminate the influence of temperature on the cooler tube due to thermal expansion and contraction. The baffles act to enhance heat transfer and support the cooler tubes.

The heat medium of the shell-and-tube cooler flows from the inlet of the connecting pipe on the cylinder to the outlet of the connecting pipe in a zigzag manner through each baffle channel in sequence. The cooler medium adopts double-pipe flow, that is, the cooler medium enters half of the cooler tubes from the water inlet through the water distribution cover, then flows into the other half of the cooler tubes from the return water cover, and enters the other side of the water distribution cover and the outlet. water pipe. When the cold medium flows through the double tubes, the residual heat released by the heat-absorbing medium is discharged from the water outlet, so that the working medium maintains the rated working temperature.

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