A cooled laser mirror

 

(57) Abstract:

Usage: in laser technology, in the resonator and in the optical path of the laser processing units. The inventive mirror has a reflecting plate, intermediate plate, base. Channels for the refrigerant is made on both sides of the intermediate plate provided between and connected to a distribution manifold and a manifold Assembly. The mirror has a high geometric stability through effective profiled cooling the reflective plate and exclude the ingress of heat into the base of the mirror. 4 C. p. F.-ly, 3 ill.

The invention relates to laser technology and can be used in the optical path of the laser processing units.

Know a cooled laser mirror [1] in which the heat exchanger contains cooling channels formed by connecting opposite the cooling channels of the first and second plates, the cooling channels in each plate is offset at an angle relative to the nearest adjacent cooling channel of the opposite plate, whereby is formed intersecting the cooling channel structure, opposite offset the Roma it is possible to design, containing wetted by the liquid heat-conducting wall between the first and second plates, preventing the connection of fluid flow between the cooling channels of the first and second plates.

The disadvantage of this technical solution is the need of the high costs of the refrigerant to obtain heat transfer coefficients 4104W/m2hail, in addition, in this mirror, it is difficult to create a region with a local increase in the heat transfer coefficient in accordance with the profile of the light load on the mirror.

Closest to the proposed technical solution is cooled laser mirror [2] consisting of a reflective plate, intermediate plate, power bases, cooling system, made in the reflective and the intermediate plate so that the plate thickness and dimensions of the cooling channels in the same and the channels in the plates shifted so that against the pillars in the reflective plate located channels of the intermediate plate, and the coolant flows in parallel through the channels of both plates. The disadvantage of this mirror is the increased consumption of fluid in the cooling system, the uneven temperature of the basics.

The purpose of izobreteny is to power 5-100 kW.

The goal is achieved due to the intensification of the cooling system, i.e., increasing the heat transfer coefficient up to 4104W/cm2hail under the reflecting plate, creating areas with a local increase in the heat transfer coefficient under the reflecting plate, and reduce the flow of heat in the base, which reduces the Flexural component of termoperenosnye reflective surface.

This is achieved by using a two-layer cooling system, where the channels for the refrigerant are made mutually intersecting both sides of the intermediate plate. Application in the design of the cooling system with intersecting channels results in an increase in the heat transfer coefficient is about 1.5 times compared with the channel system, and the system of intersecting channels on the side of the intermediate plate adjacent to the base, substantially reduces the flow of heat in the base and, in addition, is used for optimum restucci refrigerant before the refrigerant received in the holes to flow from the intermediate plate adjacent to the base, the channels under the reflecting plate. The diameter of holes for overflow is selected mainly less than the width of the channels located under the reflecting plates is her plate and limited layout area of the holes.

Dimensions intersecting channels made from both sides of the intermediate plate are selected from conditions of maximum heat removal under the reflecting plate, so the channels on the side of the intermediate plate adjacent to the reflecting plate, should have a higher surface heat transfer coefficient than the channels on the side of the intermediate plate adjacent to the base, and therefore the ratio of the width, depth, step, intersecting in two directions of channels made on the side of the intermediate plate adjacent to the reflecting plate to the corresponding parameters of channels made on the side of the intermediate plate adjacent to the base, are selected in the ranges, respectively, 0,2-0,6; 0,2-1,2; 0,3-0,7.

Channels made on the side of the intermediate plate adjacent to a reflective plate on the periphery of the end ring collector. Typically, the depth of this reservoir is chosen equal to the depth of the channels, and the width of 1.5-6 of the channel width. This manifold through holes (cross-channel) is connected to the collector collecting the refrigerant located in the base, and further connected to the exhaust system refrigerant.

Intersecting the first manifold, connected to a supply of refrigerant, and the ratio of the depth and width of the distribution manifold coolant to the depth and width of flow collector coolant is selected in the range, respectively, 0.3-1; 1-2. In addition, the distribution manifold can be placed in the base and the substrate simultaneously or only basis. The collector of the collection can also be placed in the substrate and in the basis at the same time or only at the base. To eliminate the influence of the pressure of the coolant during operation of the mirror ratio of the thickness of the intermediate plate to the thickness of the reflective plate is selected in the range of 2-10. The mirror on the back side of the Foundation has holes for fastening to the alignment system, and to reduce the effect of the tightness of fasteners made undercuts, for example, in the form of a deaf grooves.

The invention consists in that the design of the mirror system of channels made from both sides of the intermediate plate, providing effective cooling of the reflective plate and reducing the flow of heat in the base, in addition, this design allows you to create under the reflecting plate shaped heat removal in accordance with program and collector collect coolant and then a diversion systems, and the supply of refrigerant, the design and location of which are selected from the conditions of minimum flow and pressure drop of refrigerant while ensuring maximum heat removal.

In Fig. 1 shows a cooled laser mirror, General view; Fig. 2 section a-a in Fig. 1; Fig. 3 section b-B in Fig. 1.

The mirror consists of a reflecting plate 1, framework 2, the intermediate plate 3. On the side of the intermediate plate adjacent to the reflecting plate made of mutually intersecting channels 4 and on the side of the intermediate plate adjacent to the substrate intersecting channels 5, which are connected with each other through the openings 6. The mirror works as follows. In base 2 made a hole 7 through which the supplied refrigerant enters the distribution manifold 8 and further along mutually intersecting channels 5 and transverse channels 9, the refrigerant flows in the channels 4, located in the intermediate plate on the side adjacent to the reflecting plate 4, then the refrigerant through holes in the intermediate plate 6 is supplied through the channels 5 in the collector 10 collection, where it is removed through the opening 11 in base 2.

Termoperenosnye and the tension in pokernetonline directly thermal expansion, another action is bending. In the invention, which is a design with two cooling system made from two sides of the intermediate plate, to reduce the effects of thermal expansion under radial load arranged mutually intersecting channels on the side of the intermediate plate adjacent to the reflecting plate, with high heat transfer coefficient in channels ( 40000 W/m2hail).

To reduce the effects of bending is the second bottom layer of cooling the refrigerant in the channels made by the intermediate plate adjacent to the base, reduces the penetration of heat into the base, reduces thermal gradient across the thickness of the mirror and bending component of termoperenosnye and stress.

A specific example is the number of mirrors with a diameter of 100-200 mm Materials mirrors copper, copper alloys, height mirrors 60-100 mm

For example, a mirror with a diameter of 120 mm, an overall height of 67 mm has a reflective plate thickness 1.5-2 mm, an intermediate plate thickness of 7 mm and a basis 58 mm, on the side of the intermediate plate adjacent to the reflecting plate made of mutually intersecting channels with a width of 2 mm with a pitch of 4 mm and a depth of 2 mm, souzdalskaya to the base, made mutually intersecting channels with a width of 5 mm, in increments of 8 mm and a depth of 3 mm, communicating with the open annular distribution manifold with a width of 6 mm and a depth of 13 mm, holes, connecting channels, made from two sides of the intermediate plates have a diameter of 2.8 mm and placed on the mirror area bounded by the rectangle with dimensions 48 x 24 mm area of holes. The basis of mirrors made two holes with a diameter of 10 mm for the inlet and outlet of the refrigerant, in addition, at a distance of 6 mm from the back side of the Foundation made undercuts in the form of a deaf grooves with a width of 6 mm and a depth of 15 mm from the side of the axis of the mirror and parallel to its plane, the length of the groove depends on the geometry of the bounding plane.

1. A COOLED LASER MIRROR which contains the root, intermediate plate, reflecting plate, a cooling system with channels for the refrigerant, mounting holes, characterized in that the intermediate plate with two sides made of mutually intersecting in two directions, the channels for the refrigerant, connected to each other through the openings in the intermediate plate, the intermediate plate is made distribution manifold associated with the hole is in the basis of the executed collector collection associated with a hole for the conclusion of the refrigerant and with the holes in the intermediate plate connecting the collector channels on the side of the intermediate plate facing the reflecting plate, and under the mounting holes made undercuts.

2. Mirror under item 1, characterized in that the ratio of the width, depth, step, intersecting in two directions of channels made on the side of the intermediate plate adjacent to the reflecting plate to the corresponding parameters of channels made on the side of the intermediate plate adjacent to the basis chosen in the ranges(0,2 0,6) (0,2 1,2) (0,3 0,7).

3. The mirror on the PP.1 and 2, characterized in that the size and number of holes in the intermediate plate is selected from the condition that the total gate area is 1 2 of the cross-section area of the channels located under the reflecting plate and the limited layout area of the holes.

4. The mirror on the PP.1 to 3, characterized in that the ratio of the depth and width of the distribution manifold to the depth and width of collectors collect coolant is selected in the range accordingly(0,3 1,0) (1 2).

5. The mirror on the PP.1 to 4, characterized in that the ratio of the thickness of the prom is

 

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