阅读说明：本技术 一种旋转感应加热装置 (Rotary induction heating device ) 是由 肖寒 黄树海 陈强 陈刚 宁海青 舒大禹 柴舒心 王艳彬 向林 于 2021-08-30 设计创作，主要内容包括：为解决现有技术中存在的原材料加热与载荷传递无法协同工作的技术问题,本发明实施例提供一种旋转感应加热装置,包括：载荷传递轴,设有用于容纳原料容器的空腔；原料容器,用于放置金属原材料；具有冷却通道的感应加热线圈,包括：金属管；冷却通道,设于金属管的中空结构内,用于冷却金属管,冷却通道的进口和出口分别设有导电连接管；以及水冷导电装置,包括：壳体,用于通过轴承套设于载荷传递轴外侧；环形轨道,设有导电部；导电滑环,与导电连接管的侧部密封连接,设于环形轨道内并与导电部滑动接触,导电滑环的远离金属管的一侧与环形轨道滑动密封连接；以及冷却水环形槽。本发明实施例实现了原材料加热与载荷传递的协同工作。(In order to solve the technical problem that the raw material heating and the load transfer cannot work cooperatively in the prior art, an embodiment of the present invention provides a rotary induction heating apparatus, including: a load transfer shaft provided with a cavity for accommodating the raw material container; a raw material container for placing a metal raw material; an induction heating coil having a cooling channel, comprising: a metal tube; the cooling channel is arranged in the hollow structure of the metal pipe and used for cooling the metal pipe, and an inlet and an outlet of the cooling channel are respectively provided with a conductive connecting pipe; and a water-cooled conductive device comprising: the shell is sleeved outside the load transmission shaft through a bearing; an annular track provided with a conductive portion; the conductive sliding ring is hermetically connected with the side part of the conductive connecting pipe, arranged in the annular track and in sliding contact with the conductive part, and one side of the conductive sliding ring, which is far away from the metal pipe, is hermetically connected with the annular track in a sliding manner; and a cooling water annular groove. The embodiment of the invention realizes the cooperative work of raw material heating and load transfer.)

1. A rotary induction heating apparatus, comprising:

a load transfer shaft provided with a cavity for accommodating the raw material container;

a raw material container for placing a metal raw material;

an induction heating coil having a cooling channel, comprising:

a metal tube for winding around the raw material container disposed outside the cavity to heat the inside of the cavity, the metal tube being disposed in the cavity between the load transfer shaft and the raw material container so as to rotate with the load transfer shaft when the load transfer shaft rotates;

the cooling channel is arranged in the hollow structure of the metal pipe and used for cooling the metal pipe, and an inlet and an outlet of the cooling channel are respectively provided with a conductive connecting pipe; and

water-cooled electric installation includes:

the shell is sleeved outside the load transmission shaft through a bearing;

the annular track is arranged in the shell and is provided with a conductive part;

the conductive sliding ring is hermetically connected with the side part of the conductive connecting pipe, arranged in the annular track and in sliding contact with the conductive part, and one side of the conductive sliding ring, which is far away from the metal pipe, is hermetically connected with the annular track in a sliding manner; and

and the cooling water annular groove is positioned between the shell and one side of the conductive slip ring, which is far away from the metal pipe, and is used for being communicated with the end part of the conductive connecting pipe so as to enable the cooling channel to be communicated with the cooling water annular groove.

2. The rotary induction heating apparatus as claimed in claim 1, wherein the free end of the electrically conductive connecting tube is passed out from a side of the electrically conductive slip ring remote from the metal tube for communication with the cooling water annular groove.

3. The rotary induction heating apparatus as claimed in claim 1, wherein said material container is of tubular construction.

4. The rotary induction heating apparatus as claimed in claim 1, wherein said housing comprises:

a conductive end cap; and

the fixed conductive base is provided with an annular track and is detachably connected with the conductive end cover.

5. The rotary induction heating apparatus as claimed in claim 1, wherein said conductive portion comprises:

and the conductive roller pins are used for being in sliding contact with the conductive slip ring, and all the conductive roller pins are uniformly distributed on the annular track.

6. The rotary induction heating apparatus as claimed in claim 1, wherein the side of the conductive slip ring remote from the metal tube is in sliding sealing connection with the endless track via an annular sealing ring.

7. The rotary induction heating apparatus as claimed in claim 1, wherein said raw material container is Al₂O₃And (3) ceramic materials.

8. The rotary induction heating apparatus as claimed in claim 1, wherein said bearings are isolation bearings.

9. The rotary induction heating apparatus as claimed in claim 1, wherein the load transmission shaft is made of a high-strength steel material.

10. The rotary induction heating apparatus as claimed in claim 1, wherein the load transfer shaft includes an end cap for opening the cavity.

Technical Field

The present invention relates to a rotary induction heating apparatus.

Background

With the development of material processing technology, special demands are put on the heating technology of materials and equipment thereof in some occasions, for example, the feeding process of some additive forming processes needs to locally and rapidly heat the conveyed metal raw materials, and in addition, force or torque load needs to be transmitted along the direction of a feeding axis at the same time.

Particularly, when high-melting-point metal materials such as steel, titanium, nickel alloy and the like are heated, the heating temperature is required to be more than 1000 ℃, the heating rate is more than or equal to 30 ℃/s, and meanwhile, large axial torque and axial force are required to be transmitted, the traditional high-temperature metal structural material cannot maintain the strength under the high-temperature condition of more than 1000 ℃, and the ceramic material cannot meet the use environments of large torque, alternating dynamic load and high thermal stress, so that the embarrassment situation that the high-temperature heating and load transmission of raw materials cannot work cooperatively is caused.

Disclosure of Invention

In order to solve the technical problem that raw material heating and load transfer cannot work cooperatively in the prior art, the embodiment of the invention provides a rotary induction heating device.

The embodiment of the invention is realized by the following technical scheme:

an embodiment of the present invention provides a rotary induction heating apparatus, including:

a load transfer shaft provided with a cavity for accommodating the raw material container;

a raw material container for placing a metal raw material;

an induction heating coil having a cooling channel, comprising:

a metal tube for winding around the raw material container disposed outside the cavity to heat the inside of the cavity, the metal tube being disposed in the cavity between the load transfer shaft and the raw material container so as to rotate with the load transfer shaft when the load transfer shaft rotates;

the cooling channel is arranged in the hollow structure of the metal pipe and used for cooling the metal pipe, and an inlet and an outlet of the cooling channel are respectively provided with a conductive connecting pipe; and

water-cooled electric installation includes:

the shell is sleeved outside the load transmission shaft through a bearing;

the annular track is arranged in the shell and is provided with a conductive part;

the conductive sliding ring is hermetically connected with the side part of the conductive connecting pipe, arranged in the annular track and in sliding contact with the conductive part, and one side of the conductive sliding ring, which is far away from the metal pipe, is hermetically connected with the annular track in a sliding manner; and

and the cooling water annular groove is positioned between the shell and one side of the conductive slip ring, which is far away from the metal pipe, and is used for being communicated with the end part of the conductive connecting pipe so as to enable the cooling channel to be communicated with the cooling water annular groove.

Furthermore, the free end of the conductive connecting pipe penetrates out of one side, far away from the metal pipe, of the conductive sliding ring to be communicated with the cooling water annular groove.

Further, the raw material container is of a tubular structure.

Further, the housing includes:

a conductive end cap; and

the fixed conductive base is provided with an annular track and is detachably connected with the conductive end cover.

Further, the conductive portion includes:

and the conductive roller pins are used for being in sliding contact with the conductive slip ring, and all the conductive roller pins are uniformly distributed on the annular track.

Furthermore, one side of the conductive slip ring, which is far away from the metal pipe, is connected with the annular track in a sliding and sealing mode through an annular sealing ring.

Further, the raw material container is made of Al₂O₃And (3) ceramic materials.

Further, the bearing is an isolation bearing.

Furthermore, the load transmission shaft is made of high-strength steel.

Further, the load transfer shaft includes an end cap for opening the cavity.

Compared with the prior art, the embodiment of the invention has the following advantages and beneficial effects:

according to the rotary induction heating device provided by the embodiment of the invention, when the load transfer shaft rotates, the heating of the metal raw material in the cavity and the cooling of the induction heating coil of the cooling channel are realized through the induction heating coil with the cooling channel, and the conduction of the induction heating coil with the cooling channel and the cooling water circulation cooling are realized through the water-cooling conducting device, so that the technical problem that the raw material heating and the load transfer cannot work cooperatively in the prior art is solved.

Drawings

In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic view of a rotary induction heating apparatus.

Fig. 2 is a schematic view of the cross-sectional structure a-a of fig. 1.

Fig. 3 is a schematic view of an external connection structure of the load transmission shaft and the water-cooling conductive device.

Fig. 4 is a schematic view of the internal connection structure of the load transmission shaft and the water-cooling conductive device.

Reference numbers and corresponding part names in the drawings:

1-a load transfer shaft, 2-a first water-cooling conductive device, 3-a second water-cooling conductive device, 4-a cooling water inlet, 5-a cooling water outlet, 6-a cooling water annular groove, 7-a connecting channel, 8-a conductive connecting pipe, 9-a conductive rolling needle, 10-an induction heating coil, 11-a cavity, 12-a sealing ring, 13-a conductive sliding ring, 14-a conductive end cover, 15-a fixed conductive base, 16-an insulating sleeve and 17-a bearing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.

Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present invention.

Examples

In order to solve the technical problem that the raw material heating and the load transfer cannot work cooperatively in the prior art, referring to fig. 1 to 4, an embodiment of the present invention provides a rotary induction heating apparatus, including: a load transmission shaft 1 provided with a cavity 11 for accommodating a raw material container; a raw material container for placing a metal raw material; an induction heating coil 10 having a cooling channel, comprising: a metal tube for winding around the raw material container disposed outside the cavity to heat the inside of the cavity, the metal tube being disposed in the cavity between the load transfer shaft and the raw material container so as to rotate with the load transfer shaft when the load transfer shaft rotates; the cooling channel is arranged in the hollow structure of the metal pipe and used for cooling the metal pipe, and an inlet and an outlet of the cooling channel are respectively provided with a conductive connecting pipe 8; and a water-cooled conductive device comprising: the shell is sleeved outside the load transmission shaft through a bearing; the annular track is arranged in the shell and is provided with a conductive part; the conductive sliding ring 13 is hermetically connected with the side part of the conductive connecting pipe, is arranged in the annular track and is in sliding contact with the conductive part, and one side of the conductive sliding ring, which is far away from the metal pipe, is in sliding sealing connection with the annular track; and the cooling water annular groove 6 is positioned between the shell and one side of the conductive slip ring, which is far away from the metal pipe, and is used for being communicated with the end part of the conductive connecting pipe so as to enable the cooling channel to be communicated with the cooling water annular groove.

Therefore, when the load transfer shaft rotates, the heating of the metal raw material in the cavity and the cooling of the induction heating coil of the cooling channel are realized through the induction heating coil with the cooling channel, and the conduction and cooling water circulation cooling of the induction heating coil with the cooling channel are realized through the water-cooling conducting device, so that the technical problem that the raw material heating and the load transfer cannot work cooperatively in the prior art is solved.

In particular, referring to fig. 1, the rotary induction heating apparatus comprises a load transfer shaft 1, optionally having a cavity 11 for placing a material container, the load transfer shaft comprising an end cap for opening the cavity. Optionally, the cavity is arranged in the storage part, and the end cover is detachably connected with the part of the load transfer shaft for storing the raw material container, so that the raw material container is convenient to take and place; to facilitate access to the material container, optionally the material container is of tubular construction; alternatively, the raw material container is made of Al₂O₃The ceramic material can ensure that the temperature resistance of the raw material container can reach more than 1000 ℃, and is convenient for heating high-melting-point metal materials such as steel, titanium, nickel alloy and the like. Optionally, the load transmission shaft is made of high-strength steel such as 40Cr and is subjected to thermal refining for bearing torque and axial force.

The load transmission shaft adopts a two-section design, so that the raw material container is convenient to install. The core tube is made of Al₂O₃The ceramic is manufactured to meet the heat-resistant requirement that high-melting-point metal materials such as steel, titanium, nickel and the like are heated to 1000 ℃. When the device operates, the raw material container rotates along with the load transmission shaft, and the raw material container does not bear torque and axial force in the working process and is only used for containing high-temperature metal raw materials after induction heating.

A raw material container for containing a metallic raw material is formed in a tubular shape from a ceramic and is disposed inside a load transmission shaft. The induction heating coil is positioned between the gap between the raw material container and the load transfer shaft, the coil body is designed to be of a hollow structure, red copper is selected as a material, and when the device operates, the induction heating coil and the load transfer shaft rotate together and are connected with the water-cooling conducting device through the conducting connecting pipe. The water-cooling conductive module is coaxially arranged on the periphery of the load transfer shaft, and has the main function of realizing the conductive and circulating cooling functions under the dynamic rotation condition of the shaft body when the device operates.

An induction heating coil 10 with a cooling channel is arranged in a cavity 11 between the load transfer shaft and the raw material container, and the induction heating coil is sleeved outside the raw material container, or a metal pipe of the induction heating coil is wound outside the raw material container. Specifically, the induction heating coil includes a metal tube wound outside the raw material container and a cooling passage located inside a hollow structure of the metal tube. Thus, the induction heating coil can heat the raw material container by rotating induction when the load transmission shaft rotates by energizing the metal pipe; alternatively, the metal tube may be cooled with a refrigerant through a cooling passage in the metal tube after the raw material container is heated.

In order to realize the heating and cooling functions of the induction heating coil under the condition that the load transmission shaft rotates; the inlet and the outlet of the cooling channel are respectively connected with the water-cooling conductive device through a conductive connecting pipe.

Specifically, referring to fig. 1, a hole is formed in the side wall of the load transfer shaft, an inlet of the induction heating coil 10 is connected to an inlet conductive connecting pipe through the hole in the side wall of the load transfer shaft, an outlet of the induction heating coil is connected to an outlet conductive connecting pipe through the hole in the side wall of the load transfer shaft, and optionally, the inlet conductive connecting pipe is connected to the first water-cooling conductive device 2; the outlet conductive connecting pipe is connected with the second water-cooling conductive device 3; therefore, the heating and cooling of the induction heating coil are realized through the first water-cooling conductive device and the second water-cooling conductive device.

The conductive connecting pipe is made of tungsten-copper alloy with high strength and conductive performance, is designed to be of a hollow structure, one end of the conductive connecting pipe is located inside the load transfer shaft, the load transfer shaft is in threaded connection with the upper conductive interface and the lower conductive interface of the induction coil, and the other end of the conductive connecting pipe is located outside the load transfer shaft and is in threaded connection with the conductive sliding ring. The conductive slip ring is of an annular structure and is made of tungsten-copper alloy; besides being connected with the conductive connecting pipe, the two conductive slip rings are integrally positioned in the annular track. The electrically conductive kingpin of the tungsten-copper alloy material of circular orbit upside and downside installation, during the function, the rotatory induction coil that drives of load transmission axle is rotatory with electrically conductive connecting pipe, and electrically conductive connecting pipe drives electrically conductive sliding ring and rotates in circular orbit inside to realize induction coil's rotatory concerted movement.

Optionally, the first water-cooling conductive device and the second water-cooling conductive device have the same structure, and take the first water-cooling conductive device as an example, and include a housing; referring to fig. 3, the housing is connected to the outside of the load transfer shaft 1, in turn, by a bearing 17, optionally an isolation bearing, and an insulating sleeve 16. Thus, the housing can be kept relatively stationary while the load transmission shaft can be rotated.

Optionally, the housing comprises a conductive end cap 14 and a fixed conductive base 15, the fixed conductive base 15 is provided with an annular track, and the fixed conductive base 15 is used for being detachably connected with the conductive end cap 14.

The annular track is provided with a conductive part for connecting with the conductive connecting pipe so as to supply power to the induction heating coil.

Further, the conductive portion includes:

and the conductive roller pins are used for being in sliding contact with the conductive slip ring, and all the conductive roller pins are uniformly distributed on the annular track.

Referring to fig. 2, the conductive part may alternatively comprise an annular structure formed by a plurality of conductive needle rollers 9 uniformly distributed on the upper side and the lower side of the annular rail respectively; the conductive connecting pipe is arranged in the annular track through a conductive sliding ring; the upside of the conductive sliding ring 13 is in sliding contact with the conductive roller pin on the upside of the annular track, and the downside of the conductive sliding ring 13 is in sliding contact with the conductive roller pin on the downside of the annular track, so that when the conductive connecting pipe is driven by the load transmission shaft to rotate, the conductive sliding ring is driven to rotate in the annular track by taking the load transmission shaft as a rotation center, and the induction heating coil is heated in the rotating state of the load transmission shaft.

Optionally, the side of the conductive slip ring away from the metal tube is in sliding sealing connection with the circular track through an annular sealing ring.

Referring to the right side of fig. 4, the right side of the slip ring is provided with a sealing ring 12 to provide a sliding and sealing connection of the slip ring to the circular track.

Since the high-frequency alternating current flowing through the induction coil is large during heating, the induction coil must be cooled, and the coil is prevented from melting at high temperature under the action of joule heat, so that the cooling function of the coil must be considered. The embodiment of the invention can realize two functions of real-time cooling and electric conduction of the coil in a rotary motion state. Cooling function: when high-pressure cooling water enters the cooling water annular groove through a cooling water inlet on the fixed conductive seat, the cooling water in the cooling water annular groove enters the conductive connecting pipe under the action of pressure, flows into the induction heating coil through the conductive connecting pipe, then flows into the other cooling water annular groove from a water outlet of the induction heating coil, and finally flows out from a water outlet on the other fixed conductive seat to finish primary cooling circulation. When the conductive slip ring rotates, the hole on the side wall of the conductive slip ring is always positioned in the annular water tank space, and the inflow and outflow of cooling water are not influenced, so that the real-time cooling of the rotary induction coil can be realized. The conduction function is as follows: the fixed conductive seat, the conductive roller pin, the conductive slip ring, the connecting pipe and the induction coil are connected to form a current loop, and the whole circuit is isolated from the load transmission shaft through the insulating sleeve. When the conductive sliding ring rotates, dynamic conduction between the conductive sliding ring and the fixed conductive seat is realized through rolling contact of the conductive rolling needles, and the current loop is cooled in real time through cooling water of the cooling water path.

To facilitate cooling of the induction heating coil after heating. Optionally, the shell is also provided with a cooling water annular groove 6; the cooling water annular groove is arranged between the shell and the outer side of the conductive sliding ring, in order to prevent liquid in the cooling water annular groove from entering the annular track, one side of the conductive sliding ring 13, which is close to the inside of the cooling water annular groove, is connected with the annular track in a sliding and sealing mode through the annular sealing ring, and therefore the liquid in the cooling water annular groove is prevented from entering the annular track under the condition that the conductive sliding ring rotates.

And the free end of the conductive connecting pipe penetrates out of one side of the conductive sliding ring, which is far away from the metal pipe, so as to be communicated with the cooling water annular groove.

In order to facilitate water supply, the shell is also provided with a cooling water inlet 4 and a cooling water outlet 5, the cooling water inlet and the cooling water outlet are respectively communicated with an inlet conductive connecting pipe through a cooling water annular groove, the conductive connecting pipe penetrates out from one side of the conductive sliding ring close to the inside of the cooling water annular groove or a connecting channel 7 is formed in the conductive sliding ring, so that the cooling water inlet is communicated with the inlet conductive connecting pipe, the cooling water outlet is communicated with an outlet conductive connecting pipe (all connecting structures close to the inside of the cooling water annular groove are provided with sealing structures), and therefore after the cooling water is filled in the cooling water annular groove, the cooling water inlet is communicated with the cooling water inlet through the cooling water annular groove under the action of water pressure; then under the action of water pressure, the induction heating coil passes through the cooling channel and then is communicated with the cooling water outlet through the cooling water annular groove.

Thus, by the arrangement of the water-cooled conductive means, the induction heating coil 10 and the conductive portion, the heating of the raw material and the load transmission are performed in cooperation, that is, the heating and cooling of the raw material container in the load transmission shaft are performed without affecting the rotation of the load transmission shaft.

The working process is as follows: starting a cooling function, and cooling the device by cooling water flowing through the cooling channel; secondly, starting feeding, and filling metal raw materials in the forms of powder, particles, scraps, wires, rods and the like into the raw material cavity; starting the load transmission shaft, and rotating the shaft body (applying axial force at the same time); starting the induction heating function to heat the metal raw material in the ceramic core tube so as to finish the rapid heating of the raw material and the transmission of the axial load in the feeding process. Since the device adopts Al₂O₃The high-temperature resistant ceramic core tube and the cooling design have the heating temperature of over 1000 ℃, and meet the requirements of rapid preheating and subsequent processing in the material increase forming and feeding process of high-melting-point alloys such as steel, titanium, nickel and the like.

And (4) at the end: firstly, closing an induction heating function and stopping heating; stopping the rotation of the load transmission shaft; thirdly, stopping feeding after the whole device is cooled to room temperature; and fourthly, closing the cooling function.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.