CN201515306U

CN201515306U - Converter heat pipe radiator

Info

Publication number: CN201515306U
Application number: CN2009200658877U
Authority: CN
Inventors: 朱继贤; 李春阳; 李纯; 廖向前
Original assignee: ZHUZHOU TIMES THERMAL TECHNOLOGIES CO LTD; Zhuzhou National Engineering Research Center of Converters Co Ltd
Current assignee: Zhuzhou National Engineering Research Center of Converters Co Ltd; Zhuzhou CRRC AVC Thermal Technology Co Ltd
Priority date: 2009-09-14
Filing date: 2009-09-14
Publication date: 2010-06-23
Anticipated expiration: 2019-09-14

Abstract

The utility model relates to a converter heat pipe radiator, comprising a radiator base plate, a heat pipe, radiating fins and a converter heating base plate (IGBT or other forms of heating element), wherein the root part of the heat pipe is inserted in the radiator base plate. The converter heat pipe radiator is characterized in that the heat pipe is vertically and obliquely inserted into the main plane of the radiator base plate and passes through the base plate; the bottom surface of the root part of the heat pipe is directly contacted with the surface of the converter heating substrate; the cross section of the heat pipe is variable, and is in a step-shaped structure with small upper part and large lower part, wherein the section of the root part is larger than the section of the upper part, namely the section of the root part below is enlarged; the section of the heat pipe is shaped like a circular pipe or an equilateral polygon; the upper part and the root part of the heat pipe are respectively in a two-section combined structure with different diameters, wherein the upper part of the heat pipe is a circular or polygonal cylindrical body with the diameter; and the root part of the heat pipe is a circular or polygonal cylindrical body and is thicker than the upper part of the heat pipe. In the converter heat pipe radiator, the total heat resistance is reduced by 20 to 30 percent compared with the original total heat resistance, and the radiating power is increased by 100 percent.

Description

A kind of dissipating heat of thermotube of convertor device

Technical field

The utility model relates to a kind of radiating element of power equipment, refer in particular to a kind of heat-pipe radiator of power equipment current transformer, international Patent classificating number is B61F05/02, is mainly used in the big capacity radiator of various track traffics (electric power, diesel locomotive, motor train unit and railcar etc.) current transformer or other power equipment current transformers.

Background technology

Can produce power loss (heat) when rail vehicle vehicle (electric power, diesel locomotive and railcar) and the work of power equipment current transformer, therefore need heat radiation, power consumption is big more, and the capacity of heat radiation is big more.At present the radiating mode of current transformer mainly contains three kinds of air-cooled, water-cooled and heat pipe heat radiations, have only heat-pipe radiator and water-cooled to have big capacity heat-sinking capability, yet water cooling system complexity, not as the heat-pipe radiator good cooling results, simple in structure, so economical with materials is more and more heat-pipe radiator that adopts.General heat-pipe radiator as shown in Figure 1, aluminium radiator substrate 1, heat pipe 2, fin 3 and substructure for electrical device 4 among the figure.Heat pipe 2 closely is connected with aluminium matter (perhaps copper) baseplate substrate 1 by pressure or welding method, and has formed heat-pipe radiator.

Be fitted on the aluminium base 1 by securing member and work as device substrate 4, the heat that the power consumption of element transforms, be delivered to aluminum soleplate substrate 1 from device substrate 4, by weld layer, transmit copper heat pipe more again, owing to unit, device heating face are indirect with contacting of heat pipe, power consumption transforms in the path that is delivered to cooling air of heat, the a plurality of series resistances that exist comprise compositions such as R1, R2, R3 and R4, R1---the contact heat resistance of unit, device and aluminium base; The thermal-conduction resistance of R2---aluminium base; The contact heat resistance of R3---aluminium base and heat pipe; The thermal resistance of R4---heat pipe itself; R5---be the contact heat resistance of heat pipe and fin; R6---fin is to the thermal resistance of air.

The radiator of this type must adopt welding method to realize in order to reduce resistance R 2 and R3, and about the power losses limit 3000W of this method for single thyristor or IGBT module, thermal resistance 0.020K/W can be suitable for.But be applied to a plurality of thyristors or IGBT module, or power loss is during greater than 3000W, not only efficient is low, and welding quality can have influence on contact heat resistance R3, the thermal resistance R2 of weld layer itself also is unavoidable, and like this, entire thermal resistance equals each thermal resistance sum and just can not reduce.Therefore necessary this is improved.

The utility model content

This patent utility model problem to be solved is: at the deficiency of existing dissipating heat of thermotube of convertor device structure, do not changing under existing IGBT current transformer phase module external interface and the ventilation condition, proposing a kind of change by heat spreader structures makes heat dispersion better, and thermal resistance is lower, the power loss that can reach single IGBT module is more than 6000W, and the dissipating heat of thermotube of convertor device of thermal resistance below 0.010K/W.

The purpose of this utility model is achieved through the following technical solutions: a kind of dissipating heat of thermotube of convertor device, comprise radiator base plate, heat pipe, fin and current transformer heating base plate (IGBT or other form heater element), the root of heat pipe is inserted in the radiator base plate; It is characterized in that: heat pipe is that vertical oblique cutting is gone into the radiator base plate primary flat and passed substrate, and heat pipe root bottom surface directly directly contacts with the surface of current transformer heating base plate; And the cross section of heat pipe changes, and is up-small and down-big step structure, and wherein the cross section, section ratio top of root is big, and also promptly following root section strengthens (conventional heat pipe is prismatic); The heat pipe cross section comprises tubular or regular polygon, and the top of heat pipe and root are respectively two joint combining structures of different-diameter, wherein the top of heat pipe is the circle or the polygon column of a diameter, and the root of heat pipe is circle or the polygon column thicker than heat pipe top; The material that heat pipe is made can be copper or other Heat Conduction Materials; The root of heat pipe and substrate are compression fit or welding.

The produced heat-pipe radiator of the utility model method is owing to adopt heat pipe root bottom surface directly directly to contact with the surface of device substrate, the R2 (through the thermal-conduction resistance of substrate thickness) and the R3 (contact heat resistance of substrate and heat pipe) that just do not have conventional radiating mode, so entire thermal resistance reduces greatly; Simultaneously,, increased the heat pipe root area of dissipation of this kind structure, effectively changed the not enough problem of original homalographic heat pipe heat radiation area, excellent radiation performance owing to the root enlarged configuration that adopts.

Answer the position needs of current transformer on the rail traffic vehicles, radiator base plate is that vertical, heat pipe and level have certain inclination angle, this is the operate as normal requirement of gravity type heat pipe, so heat pipe front end, top fin area are littler than middle, to increase fin quantity in the restriceted envelope.

The heat-pipe radiator that the utility model is made, its entire thermal resistance can a lot (reduce by 20～30%) than original reduction; Many (100%) (reaching 6000W approximately) that heat radiation power increases is so radiating efficiency improves greatly.Because function admirable is used for the train traveling air cooling or the forced ventilation cooling of IGBT main convertor on subway and motor train unit or the locomotive, IGBT AuCT, and similar power converter radiator on the ground, can obtain great economic benefit.

Description of drawings

Fig. 2 is a heat-pipe radiator structure structural representation of the present utility model;

Among the figure: 1, radiator base plate; 2, heat pipe; 3, fin; 4, device substrate; 5, heat pipe root; 6, heat pipe top.

Embodiment

Accompanying drawing 2 has provided an embodiment of the present utility model, and the utility model will be further described below in conjunction with accompanying drawing.

From accompanying drawing 2 as can be seen, the utility model is a kind of heat of thermotube of convertor formula radiator, adopt heat pipe to dispel the heat, heat pipe inserts in the radiator base plate, radiator base plate is close on the current transformer heating base plate, be characterized in: heat pipe is that vertical oblique cutting is gone into the radiator base plate primary flat and passed substrate, and heat pipe root bottom surface directly directly contacts with the surface of current transformer heating base plate; And the cross section of heat pipe changes, and is up-small and down-big step structure, and the cross section, section ratio top of root is big, and the heat radiation of current transformer heating base plate is by directly conducting with the surperficial heat pipe root bottom surface that directly contacts of current transformer heating base plate.

Described heat of thermotube of convertor formula radiator comprises radiator base plate 1, heat pipe 2, fin 3 and device substrate 4 (IGBT or other form), and the root of heat pipe 2 is inserted in the radiator base plate 1.In order to make radiator can adapt to the status requirement of rail vehicle vehicle, obtain great heat radiation effect, heat pipe and level have certain inclination alpha (α is and 65 °-75 ° of current transformer heating base plate primary flat angles), heat pipe is that vertical oblique cutting is gone into the radiator base plate primary flat and passed substrate, and heat pipe root bottom surface directly directly contacts with the surface of current transformer heating base plate; And the cross section of heat pipe changes, and is up-small and down-big step structure, and wherein 6 cross sections, section ratio top of root 5 are big, and also promptly following root section strengthens (conventional heat pipe is prismatic); The heat pipe cross section comprises tubular or regular polygon, and the top 6 of heat pipe and root 5 are respectively two joint combining structures of different-diameter, wherein the top 6 of heat pipe is the circle or the polygon column of a diameter, and the root 5 of heat pipe is circle or the polygon column thicker than heat pipe top; The material that heat pipe is made can be copper or other Heat Conduction Materials; The root of heat pipe and substrate are compression fit or welding.Heat pipe fin area difference up and down, evenly reducing than middle area of two ends can increase the fin count in the restriceted envelope.

The architectural feature of the utility model heat pipe is: the cross section of heat pipe 2 changes, and heat pipe 2 is divided into two sections, and the top of heat pipe is radiating segment, and the bottom of heat pipe is the heat pipe root; The radiating segment cross section on the section ratio top of heat pipe root is big, and also promptly following root section strengthens (conventional heat pipe is prismatic); The radiating segment variable cross-section transition on heat pipe root and heat pipe top is joined.The heat pipe root inserts in the substrate 1, and be compression fit or weld together with substrate 1, and the root bottom surface of heat pipe 2 (heat pipe bottom surface), directly contact with device substrate 4 (i.e. the heating face of unit, device).The heat pipe cross section comprises tubular or other different form, and top radiating segment that also can heat pipe is circular, and the heat pipe root of heat pipe bottom is square.The material that heat pipe is made can be copper or other Heat Conduction Materials.The heat-pipe radiator that adopts this patent architectural feature to make can be applicable to (perhaps other power equipment) converter device on various electric power (internal combustion) locomotive, motor train unit and the railcar.

Claims

1. a dissipating heat of thermotube of convertor device comprises radiator base plate, heat pipe, fin and current transformer heating base plate, and the root of heat pipe is inserted in the radiator base plate; It is characterized in that: heat pipe is that vertical oblique cutting is gone into the radiator base plate primary flat and passed substrate, and heat pipe root bottom surface directly directly contacts with the surface of current transformer heating base plate; And the cross section of heat pipe changes, and is up-small and down-big step structure, and wherein the cross section, section ratio top of root is big.

2. dissipating heat of thermotube of convertor device as claimed in claim 1, it is characterized in that: described heat pipe cross section comprises tubular or regular polygon, and the top of heat pipe and root are respectively two joint combining structures of different-diameter, wherein the top of heat pipe is the circle or the polygon column of a diameter, and the root of heat pipe is circle or the polygon column thicker than heat pipe top.

3. dissipating heat of thermotube of convertor device as claimed in claim 1 is characterized in that: the material of described heat pipe is copper Heat Conduction Material.

4. dissipating heat of thermotube of convertor device as claimed in claim 1 is characterized in that: the root of described heat pipe and substrate are compression fit or welding.