SU718689A1 - Heat pipe - Google Patents

Description

The invention relates to the field of heat transfer devices and can be used to create heat pipes with a thin-walled body.

Known heat pipe containing 5 body and coaxially located inside the tubular insert with capillary through-cuts and jumpers located on the inside of the insert [1]. 10

The slots in the known pipe are made longitudinal and the jumpers are transverse, which leads to insufficiently high pipe strength in the case of a thin-walled case under operating conditions at increased external pressure.

The aim of the invention is to increase the strength of a thin-walled heat pipe under conditions of excessive external pressure.

According to the invention, this goal is achieved by the fact that the slots are made transverse or spiral, and the jumpers are located along the generatrix of the insert. In addition, wire harnesses can be placed in the slot, while the slot has a 25 cross section that expands in the radial direction. Each jumper can be made in the form of a tubular channel open from the outer surface of the insert and connected to the slots by means of a capillary gap, with radial capillary grooves being made on one of the walls of the capillary gap. On the inner surface of the insert, longitudinal capillary grooves can be made.

In FIG. 1 schematically shows a heat pipe; in FIG. 2 - part tubular, inserts with spiral slots; in FIG. 3 - part of a tubular insert with transverse slots and a jumper in the form of a tubular channel; in Fig. 4, a fragment of a tubular insert with a wire bundle in a slot, a longitudinal section.

The heat pipe contains a housing 1 and a tubular insert 2 coaxially located inside it with capillary through-cuts 3 made transverse or spiral, and jumpers 4 located along the generatrix of the insert 2. Wire bundles 5 can be placed in the slot 3 to increase capillary pressure, while the cross section of the slots 3 is made expanding in the radial direction, that is, as you move away from the axis of the insert 2. Each jumper 4 can be made in the form of a tubular channel 6, open from the outer surface of the insert 2 and connected to the slots 3 by means of a capillary slot 7, on one wall of which radial capillary grooves are made 8. On the inner * <· hM »> Λ '1', '4 • -I;', f · ** the surface of insert 2 longitudinal capillary grooves can be made 9. Between the inner surface of the housing 1 and the outer surface of the insert 2, spacers or a capillary-porous structure (for example, a mesh layer) can be placed.

During the operation of the pipe, evaporation and condensation of the coolant occurs in the sections of the slots 3 and in the grooves 9. The condensate returns through the gap between the insert 2 and the housing 1, as well as through the tubular channels 6 of the jumpers 4, where the condensate flows through the radial capillary grooves 9. From the tubular channels 6 condensate flows through the radial capillary channels 8 into the gap between the insert 2 and the housing 1, as well as in the slot 3, and of them into the longitudinal capillary grooves 9. To reduce the hydraulic resistance of the fluid path on the outer surface The insert 2 can have annular or spiral grooves.

The design of the insert 2 provides an increase in the strength of a thin-walled heat pipe under conditions of excessive external pressure.

Claims (6)

The surfaces of the insert 2 can be made with longitudinal capillary grooves 9. Between the inner surface of the housing 1 and the outer surface of the insert 2, spacers or a capillary-porous structure (for example, a mesh layer) can be placed. During the operation of the pipe, evaporation and condensation of the coolant occurs in the areas of the slots 3 and in the grooves 9. Condensate returns through the gap between the insert 2 and the housing 1, as well as through the tubular channels 6 of the bridges 4, where the condensate enters through the radial capillary grooves 9. From the tubular channels 6 condensate along radial capillary channels 8 enters the gap between insert 2 and body 1, as well as in slot 3, and of them into longitudinal capillary grooves 9. For a hydraulic resistance of a liquid path on the outer surface The dimensions of the insert 2 can be made with circular or spiral Kaivas. The design of the insert 2 provides for an increase in the strength of a thin-walled heat pipe under conditions of excessive external pressure. Claim 1. Heat pipe, containing body and coaxially inlet: coaxially located inside it with capillary through slots and jumpers placed on the inner side of the insert, characterized in that, in order to increase the strength of a thin-walled heat pipe, conditions of excessive external pressure, the slits are made transverse or spiral, and the jumpers are located along the forming insert. 2. A pipe according to Claim 1, characterized in that wire harnesses are placed in the slots. 3. Pipe on PP. 1 and 2, since the slots have a cross-section that expands in the radial direction. 4. A tube according to claim 1, characterized in that each bridge is made in the form of a tubular channel open from the outer surface of the insert and connected to the slots by means of a capillary slot. 5. A tube according to claim 4, characterized in that radial capillary grooves are made on one of the walls of the capillary gap. 6. A tube according to claim 1, characterized in that longitudinal capillary grooves are made on the inner surface of the insert. Sources of information taken into account during the examination 1. US Patent No. 3305005, cl. 165-105 publ. 1967. // X Rig.