WO2022011730A1

WO2022011730A1 - High-speed-rotating aluminum alloy hot roller and processing method therefor

Info

Publication number: WO2022011730A1
Application number: PCT/CN2020/103293
Authority: WO
Inventors: 周焕民
Original assignee: 无锡中力科技有限公司
Priority date: 2020-07-16
Filing date: 2020-07-21
Publication date: 2022-01-20
Also published as: CN111733467A

Abstract

A high-speed-rotating aluminum alloy hot roller and a processing method therefor. The high-speed-rotating aluminum alloy hot roller comprises a motor mechanism (1), an induction heating mechanism (2), an aluminum alloy roller body (3), and a temperature control unit (7). A high-speed permanent magnet motor (11) drives a motor shaft (12) to rotate, in order to drive the aluminum alloy roller body (3) to rotate, and the temperature control unit (7) controls the induction heating mechanism (2) to perform induction heating on the aluminum alloy roller body (3). By means of a stainless steel tapered connecting sleeve, a fixed connection mode is used between the motor shaft (12) and the aluminum alloy roller body (3). The inner surfaces of heat pipe holes (5) undergo coefficient of friction reduction and anti-corrosion surface treatment, and at the same time, the distances from each heat pipe hole (5) to the surface of the aluminum alloy roller body (3) are kept equivalent. A heating segment of the aluminum alloy roller body (3) is provided with a ferrite stainless steel sleeve (4) tightly joined thereto, serving as a heat source under the action of an induction current. Thus, the high thermal transfer performance of the aluminum alloy roller body (3) is used to transmit heat to, and vaporize, a thermal medium in the heat pipe holes (5), and by means of thermal conductivity, the effect of uniform heating of the aluminum alloy roller body (3) is achieved.

Description

A kind of high-speed rotating aluminum alloy hot roller and its processing method

technical field

The invention belongs to the technical field of hot rolls for high-speed drawing, and in particular relates to a high-speed rotating aluminum alloy hot roll and a processing method thereof.

Background technique

At present, the heating method of the drawing hot roller in the chemical fiber industry is electromagnetic induction heating, the roller body is made of steel material, and the induction coil inputting high-frequency current generates an alternating magnetic field to heat the roller body, which is an efficient direct heating method. The induction coil and the roller body are arranged in the following ways. One is single-zone induction coil heating. The axial length of the induction coil is equal to the length of the roller body. It directly heats the inner surface of the roller body, and then transfers heat to the outside of the roller body through the roller body. surface. Due to the poor uniformity of the magnetic field distribution and the limited axial length of the heating roller (less than 170mm), this method is like the improvement of the Chinese patent CN2258173Y multi-zone induction hot drawing roller, which consists of a godet, a multi-zone induction coil. , multi-channel temperature measurement sensor, multi-channel temperature transmitter; according to the requirements of the length of the working area (120 ~ 280mm), the induction coils in 2-7 zones can be used to directly heat the heat roller body, and then the multi-channel temperature changer can be used to directly heat the roller body. The transmitter sends the temperature of each area detected by the temperature measuring sensor into the control system, so that the temperature of each measuring point reaches a balance at the set working temperature. It can make the surface temperature uniformity of the roll body reach the requirement of ±1～2℃, and can be used in the industrial production of the spinning speed of 1000-6000m/min on the civil yarn and industrial yarn spinning and drawing machine.

The other is the steam jacket type, which uses electromagnetic induction to heat the roller body to vaporize the liquid in the jacket after heating, and achieve the equilibrium of gas-liquid phase change, and ensure the temperature of the working area by means of rapid heat transfer in the gas phase. uniform, and the temperature difference can reach below 1°C. However, it still belongs to the single-zone induction hot drafting roll device, that is, the length of the induction coil is equal to the length of the roll body, the mass of the roll body is large, the stress on the motor shaft is large, and the axial length of the roll body is limited.

The depth of induction heating has an inverse relationship with the frequency of the alternating current, that is, the higher the frequency, the shallower the heating depth. In the steam jacket heating heat transfer method, after the heat roller rotates at high speed, the liquid in the jacket is located outside the roller body due to the centrifugal force, and the induction heating is located inside the roller body. In order to effectively heat the liquid, the heating depth must be required. Therefore, this method generally uses alternating current with a power frequency of 50Hz, but it will affect the heating efficiency. Once the local heat load on the roll surface increases a lot, the temperature of the roll surface will not be uniform.

In addition, the above all belong to the full-length heating method of the hot roller. The hot roller is made of steel, and the iron core of the coil has a large proportion. Its quality is linear with the length of the roller body, but the stress on the motor shaft is not It is a square relationship, so the length of the roller body is greatly limited.

Another way is to reduce the length of the induction heating section under the premise that the induction heating principle remains unchanged, for example, the length of the induction heating section is controlled to be less than half of the axial length of the heat roller. One end of the heat roller is closed, and the other end is punched with many inclined holes for heat pipes. The roots of each inclined hole for heat pipes are connected and sealed as a whole. The length of the induction heating ferritic stainless steel sleeve of the hot roller is 30-45% of the total length of the roller body, the heating method is high-frequency electromagnetic heating, and the heating object is a liquid medium.

In addition, the heat pipe adopts the inclined hole design. The angle of the inclined hole of the heat pipe is that the inclined hole of the B end of the heating section is close to the outer side of the roller surface (large radius), and the A end is close to the inner side of the roller surface (small radius). Theoretically, during the high-speed operation of the heat roller, the heat medium liquid condensed at end A can quickly flow back to the heating section at end B under the action of centrifugal force, and receive heat again for gasification.

However, this technical solution still has the following problems: the roller body is still a steel body that can be heated by the induction coil, and the mass is still large; the heat transfer of the steel material roller body is poor.

The slope of the heat pipe is related to the return speed of the heat medium liquid. The smaller the slope, the less centrifugal force, the slower the return speed; especially, when the centrifugal force obtained due to the difference in radius is too small to overcome the friction of the liquid on the heat pipe wall, the return flow cannot be conduct. Therefore, the minimum inclination of the inclined hole is limited by the friction coefficient of the heat pipe wall to the liquid, and the maximum inclination to increase the liquid return speed of the heat medium is restricted by the heat transfer coefficient of the steel material and the quality of the roll body.

Therefore, in the above-mentioned technical solution of the inclined hole heat pipe using steel materials, there are still problems such as large heat roller mass, large motor shaft stress, limited roller body wall thickness and length, low thermal conductivity of materials, slow heat transfer, and limited heat pipe slope. The backflow speed of the heat medium liquid is limited, and the processing requirements of the inner wall of the heat pipe are high (reducing the friction of the liquid flow on the inner wall), and it is difficult to maintain the same distance from each heat pipe hole to the outer surface of the roller.

Therefore, there is an urgent need to develop a new high-speed rotating aluminum alloy hot roll and its processing method to solve the above problems.

technical problem

In the technical scheme of inclined hole heat pipe using steel material, there are still problems such as large heat roller mass, large motor shaft stress, limited roller wall thickness and length, low thermal conductivity of materials, slow heat transfer, limited heat pipe slope, and heat medium liquid. The backflow speed is limited, and the processing requirements of the inner wall of the heat pipe are high (reducing the friction of the liquid flow on the inner wall), and it is difficult to maintain the same distance from each heat pipe hole to the outer surface of the roller.

technical solutions

In order to solve the above technical problems, the present invention provides a high-speed rotating aluminum alloy heat roller, which includes: a motor mechanism, an induction heating mechanism, an aluminum alloy roller body and a temperature control unit; wherein the motor mechanism includes: a high-speed permanent magnet motor and Motor shaft; a stainless steel connection cone sleeve is fixed on the aluminum alloy roller body, the motor shaft is connected with the aluminum alloy roller body through the stainless steel connection cone sleeve, the induction heating mechanism is fixed on the connection seat, and the induction heating mechanism It is arranged in the inner hole of one end of the aluminum alloy roller body, that is, the high-speed permanent magnet motor drives the motor shaft to rotate to drive the aluminum alloy roller body to rotate, and the temperature control unit controls the induction heating mechanism to inductively heat the aluminum alloy roller body.

Further, the induction heating mechanism includes: a high-frequency induction coil assembly; the high-frequency induction coil assembly is connected to a high-frequency current to generate an alternating magnetic field to heat the aluminum alloy roller body.

Further, the inner surface of the heating section on the aluminum alloy roller body is embedded with a ferritic stainless steel sleeve, and the high-frequency induction coil assembly heats the ferritic stainless steel sleeve by induction to conduct heat to the aluminum alloy roller body. .

Further, the aluminum alloy roller body is provided with a number of heat pipe holes which are arranged around the aluminum alloy roller body and along the axial direction of the aluminum alloy roller body; one end of each heat pipe hole is close to the high-speed permanent magnet motor, and each heat pipe hole is far away from the high-speed permanent magnet. One end of the motor is communicated in the aluminum alloy roller body, and each heat pipe hole is sealed with the aluminum alloy roller body through a blocking ring.

Further, the temperature control unit includes a temperature transmitter and a temperature sensor; the temperature sensor of the temperature control unit is embedded on the aluminum alloy roller body; the temperature transmitter is installed on the high-speed permanent magnet motor, and the temperature changes The transmitter is electrically connected with the induction heating mechanism, and the temperature transmitter and the temperature sensor control the induction heating mechanism.

Further, the high-speed rotating aluminum alloy heat roller also includes: an over-temperature protector; the over-temperature protector is installed on the connection seat, and the probe of the over-temperature protector is non-contact with the end face of the aluminum alloy roller body; the over-temperature protector The protector is suitable for detecting the temperature data of the end surface of the aluminum alloy roller body, and controls the disconnection and alarm of the high frequency induction coil assembly according to the end surface temperature data of the aluminum alloy roller body.

Further, the heat pipe holes are inclined holes, and the inclination of each heat pipe hole away from the end of the high-speed permanent magnet motor to the end of the heat pipe hole close to the high-speed permanent magnet motor is 0.5°-2.5°, and the direction of the inclination is close to the end of the high-speed permanent magnet motor. The heat pipe holes are close to the outer surface of the aluminum alloy roller, the number of heat pipe holes is 20-80, and the distance between adjacent heat pipe holes is 6 mm -20mm, the wall thickness of the aluminum alloy roller body is 15mm-60mm, and the diameter of the heat pipe hole is 3mm-15mm; each heat pipe hole and the central axis of the aluminum alloy roller body are on the same plane.

Further, the aluminum alloy roller body is provided with a heating section and a heat transfer section, and the length of the heating section is the length of the induction heating mechanism for heating the ferritic stainless steel jacket, and its length is 20%-45% of the length of the aluminum alloy roller body.

On the other hand, the present invention provides a high-speed rotating aluminum alloy hot roller processing method, which includes: connecting a motor shaft and an aluminum alloy roller body through a stainless steel connection cone; connecting an induction heating mechanism through a connecting seat, and disposing the induction heating mechanism on the In the inner hole of one end of the aluminum alloy roller body; a ferritic stainless steel sleeve is tightly fixed in the heating section of the aluminum alloy roller body, so that the induction heating mechanism conducts heat to the aluminum alloy roller body through the ferritic stainless steel sleeve; The aluminum alloy roller body is provided with a number of heat pipe holes arranged around the aluminum alloy roller body and along the axis of the aluminum alloy roller body, so that one end of each heat pipe hole is close to the high-speed permanent magnet motor, and each heat pipe hole is far away from one end of the high-speed permanent magnet motor. The aluminum alloy roller body is communicated, and each heat pipe hole is sealed with the aluminum alloy roller body through the blocking ring; the high-frequency current is connected to the induction heating mechanism to generate an alternating magnetic field to heat the aluminum alloy roller body.

Further, the high-speed rotating aluminum alloy hot roll processing method is suitable for processing the above-mentioned high-speed rotating aluminum alloy hot roll.

beneficial effect

The beneficial effect of the present invention is that, in the present invention, the ferritic stainless steel sleeve and the aluminum alloy roller body are tightly fixed by welding, threading, high temperature resistant glue, etc., and the inner surface of the heat pipe hole has a reduced friction coefficient and an anti-corrosion surface. At the same time, ensure that the distance between each heat pipe hole and the surface of the aluminum alloy roller body is equal, and set a ferritic stainless steel sleeve closely connected with it in the heating section of the aluminum alloy roller body as a heat source under the action of the induced current, and then Using the high heat transfer performance of the aluminum alloy roller body made of aluminum alloy material, the heat is transferred to the heat medium in the heat pipe hole and gasified, and the effect of uniform heating of the aluminum alloy roller body is achieved through heat conduction.

Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention.

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

FIG. 1 is a structural diagram of a high-speed rotating aluminum alloy heat roll of the present invention.

FIG. 2 is a schematic diagram of the heat transfer of the aluminum alloy roll body of the present invention.

3 is an internal cross-sectional view of the aluminum alloy roll body of the present invention.

4 is a cross-sectional view of the aluminum alloy roll body C of the present invention.

FIG. 5 is a graph showing the change of high temperature creep and sustained stress of the aluminum alloy material of the present invention.

In the picture:

Motor mechanism 1, high-speed permanent magnet motor 11, motor shaft 12, stainless steel connection cone sleeve 13, connection seat 14, induction heating mechanism 2, aluminum alloy roller body 3, ferritic stainless steel sleeve 4, heat pipe hole 5, plug ring 6 , temperature control unit 7 , resolver 8 , over-temperature protector 9 , temperature sensor 10 .

Embodiments of the present invention

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

In this embodiment, as shown in FIG. 1, this embodiment provides a high-speed rotating aluminum alloy heat roller, which includes: a motor mechanism 1, an induction heating mechanism 2, an aluminum alloy roller body 3 and a temperature control unit 7; wherein The motor mechanism 1 includes: a high-speed permanent magnet motor 11 and a motor shaft 12; a stainless steel connecting cone sleeve 13 is fixed on the aluminum alloy roller body 3, and the motor shaft 12 is connected to the aluminum alloy roller body 3 through the stainless steel connecting cone sleeve 13 The induction heating mechanism 2 is fixed on the connecting seat 14, and the induction heating mechanism 2 is arranged in the inner hole of one end of the aluminum alloy roller body, that is, the high-speed permanent magnet motor 11 drives the motor shaft 12 to rotate, so as to drive the aluminum alloy roller body. The alloy roller body 3 rotates, and the induction heating mechanism 2 is controlled by the temperature control unit 7 to inductively heat the aluminum alloy roller body 3 .

In this embodiment, the aluminum alloy roller body 3 is made of a temperature-resistant and high-strength aluminum alloy material. The temperature-resistant and high-strength aluminum alloy material has a temperature resistance of 300° C. and a tensile strength of not less than 100 mpa, preferably 150 mpa. .

In this embodiment, as shown in FIG. 2 , the arrow in the figure is the heat transfer direction. In this embodiment, the ferritic stainless steel sleeve 4 and the aluminum alloy roller body 3 are tightly connected by welding, threading, high temperature resistant glue, etc. In this way, the inner surface of the heat pipe hole 5 is treated to reduce the friction coefficient and carry out anti-corrosion surface treatment. The tightly connected ferritic stainless steel sleeve 4 acts as a heat source under the action of the induced current, and then utilizes the high heat transfer performance of the aluminum alloy roller body 3 made of aluminum alloy material to transfer heat to the heat medium in the heat pipe hole 5 and gas The effect of uniform heating of the aluminum alloy roller body 3 is achieved through heat conduction.

In this embodiment, the induction heating mechanism 2 includes: a high-frequency induction coil assembly; the high-frequency induction coil assembly is connected to a high-frequency current to generate an alternating magnetic field to heat the aluminum alloy roller body 3 .

In this embodiment, the distance between the outer surface of the high-frequency induction coil assembly and the inner wall of the ferritic stainless steel sleeve 4 is 1 mm-8 mm, preferably 3 mm.

In this embodiment, the inner surface of the heating section on the aluminum alloy roller body 3 is embedded with a ferritic stainless steel sleeve 4, and the high-frequency induction coil assembly heats the ferritic stainless steel sleeve 4 by induction, so as to dissipate the heat Conducted to the aluminum alloy roller body 3 .

The traditional hot roller is made of steel, and the induction coil of the high-frequency induction coil assembly can directly heat the roller body; while in this embodiment, the aluminum alloy roller body is used, and the induction coil of the high-frequency induction coil assembly cannot be directly heated, so the aluminum alloy is used for heating. The heating section of the alloy roller body 3 corresponding to the induction heating mechanism 2 is provided with a ferritic stainless steel sleeve 4 for heating; the aluminum alloy roller body 3 can be appropriately small due to the good heat transfer of the aluminum alloy material; the weight of the entire heating roller can also be reduced.

In this embodiment, the ferritic stainless steel sleeve 4 is made of ferritic stainless steel, and the wall thickness of the ferritic stainless steel sleeve 4 is 2mm-10mm, preferably 3mm.

In this embodiment, the aluminum alloy roller body 3 is provided with a ferritic stainless steel sleeve 4 as a heating section, and its length is 20%-45% of the length of the aluminum alloy roller body 3, preferably 30%.

In this embodiment, as shown in FIG. 4 , the aluminum alloy roller body 3 is provided with a number of heat pipe holes 5 which are arranged around the aluminum alloy roller body 3 and along the axial direction of the aluminum alloy roller body 3; One end of each heat pipe hole 5 is close to the high-speed permanent magnet motor 11 , and one end of each heat pipe hole 5 away from the high-speed permanent magnet motor 11 is communicated in the aluminum alloy roller body 3 , and each heat pipe hole 5 is sealed with the aluminum alloy roller body 3 by the blocking ring 6 .

In this embodiment, as shown in FIG. 5 , the thermal conductivity of the material used for the aluminum alloy roller body 3 plays an important role in the uniform distribution of the roller surface temperature. The thermal conductivity of the aluminum alloy is about 4-5 times that of the steel material, and there are Good heat transfer performance, and the specific gravity of aluminum alloy is about one-third of that of steel material, which is the most suitable material for high-speed drawing heat rolls; but aluminum alloy has no magnetic conductivity, and under the action of induced magnetic field A large amount of heat cannot be generated. A ferritic stainless steel sleeve 4, which is closely connected with it, is set in the heating section of the aluminum alloy roller body 3 as a heat source under the action of the induced current, and then the high heat transfer performance of the aluminum alloy is used to dissipate the heat. The heat medium is transferred to the heat pipe and gasified; the steel sleeve is used as a heating element to achieve good heat transfer through the close connection between the ferritic stainless steel sleeve 4 and the aluminum alloy roller body 3, which makes the aluminum alloy roller body 3 The temperature rises, and the problem of the tight connection and processing technology between the ferritic stainless steel sleeve 4 and the aluminum alloy roller body 3 is successfully solved; the upper limit temperature of the aluminum alloy roller body 3 is 300℃, and the drafting temperature is 80℃-250℃; The tensile strength reaches 150mpa at 300°C (that is, 1500 atmospheres); the high temperature creep of the aluminum alloy roller body 3 has a great relationship with the sustained stress. The test conditions are the temperature of 175°C and the test time of 50 hours. The degree value is 50mpa, that is, the pressure of 500kg. The aluminum alloy roller body 3 is a high-speed rotating body. During the operation, there may be only slight uneven external stress, and the creep factor has little influence. The existing stress may be the heat in the heat pipe hole 5. The steam pressure of the medium does not exceed 1mpa (10kg), and the creep effect can be ignored.

In this embodiment, the aluminum alloy roller body 3 is tightly connected to the inner wall of the heating section of the aluminum alloy roller body 3 through the ferritic stainless steel sleeve 4, and the tight connection method includes welding, threading, high temperature resistant glue, etc. The coefficient of linear expansion between the aluminum alloy roller body 3 made of aluminum alloy and the ferritic stainless steel sleeve 4 made of stainless steel is quite different, but the elongation rate of the aluminum alloy roller body 3 made of aluminum alloy is greater than that of stainless steel. The ferritic stainless steel sleeve 4, and the ferritic stainless steel sleeve 4 is designed inside the aluminum alloy roller body 3, according to the spring principle, the tight connection between the aluminum alloy roller body 3 and the ferritic stainless steel sleeve 4 will not be caused by Significant changes have occurred due to repeated thermal expansion and contraction.

In this embodiment, due to the light weight and good heat transfer of the aluminum alloy, the thickness of the aluminum alloy roller body 3 can be increased, the slope of the heat pipe hole 5 can be increased, and the heat medium liquid condensed in the heat pipe hole 5 can be refluxed to the heating section more quickly , relying on the rapid heat transfer of the aluminum alloy, the rapid reflux of the condensed heat medium liquid, the rapid heat transfer in the heating section to the rapid vaporization of the liquid heating, these three fast and efficient, so that the temperature uniformity and heat load of the roll surface of the aluminum alloy roll body 3 are achieved. All have been greatly improved, the adjustment space of process design has been greatly improved, and the level of efficient and green production in the chemical fiber industry has been greatly improved. The inertia is reduced, the stress on the motor shaft 12 is reduced, and the vibration of the whole aluminum alloy heat roller can be reduced.

In this embodiment, each heat pipe hole 5 close to the end of the high-speed permanent magnet motor 11 is not opened (it can also be opened and then blocked), and the end of each heat pipe hole 5 away from the high-speed permanent magnet motor 11 is machined so that each heat pipe hole 5 is connected. , the overall seal.

In this embodiment, the temperature control unit 7 includes a temperature transmitter and a temperature sensor 10; the temperature sensor 10 of the temperature control unit 7 is embedded on the aluminum alloy roller body; the temperature transmitter is installed in a high-speed On the permanent magnet motor 11, and the temperature transmitter is electrically connected with the induction heating mechanism 2, the temperature transmitter and the temperature sensor 10 control the induction heating mechanism 2, and the temperature transmitter is suitable for cooperating with the temperature control unit 7 Realize the current frequency adjustment of induction heating mechanism 2.

In this embodiment, the high-speed rotating aluminum alloy heat roller further includes: an over-temperature protector 9; the over-temperature protector 9 is installed on the connection seat 14, and the probe of the over-temperature protector 9 is connected to the aluminum alloy roller body 3. The end faces are non-contact; the over-temperature protector 9 is suitable for detecting the temperature data of the end face of the aluminum alloy roller body 3, and controlling the disconnection and alarm of the high-frequency induction coil assembly according to the end face temperature data of the aluminum alloy roller body 3.

In this embodiment, the high-speed rotating aluminum alloy heat roller further includes: a rotary transformer 8; the rotary transformer 8 is installed on the base of the high-speed permanent magnet motor 11, and the rotary transformer 8 is electrically connected to the high-speed permanent magnet motor 11. The rotary transformer 8 is suitable for adjusting the speed precision of the high-speed permanent magnet motor 11 .

In this embodiment, the temperature of the aluminum alloy roller body 3 is controlled by whether the induction coil of the high-frequency induction coil assembly is energized or not, and the over-temperature protection of the aluminum alloy roller body 3 can be realized by the over-temperature protector 9. The steel material has low temperature resistance to prevent the aluminum alloy roller body 3 from being softened and deformed by overheating.

In this embodiment, the heat pipe holes 5 are inclined holes, and the inclination of each heat pipe hole 5 away from the end of the high-speed permanent magnet motor 11 to the end of the heat pipe hole 5 close to the high-speed permanent magnet motor 11 is 0.5°-2.5°, and the inclination of the heat pipe hole 5 is 0.5°-2.5°. The degree direction is that the heat pipe hole near the end of the high-speed permanent magnet motor is close to the outer surface of the aluminum alloy roller, preferably 1°, the number of heat pipe holes 5 is 20-80, preferably 50, and the distance between adjacent heat pipe holes 5 is 6 mm-20mm, preferably 12mm, the wall thickness of the aluminum alloy roller body 3 is 15mm-60mm, preferably 35mm, the diameter of the heat pipe hole 5 is 3mm-15mm, preferably 7mm; each heat pipe hole 5 and the central axis of the aluminum alloy roller body 3 are in the same flat.

Further, the aluminum alloy roll body is provided with a heating section and a heat transfer section, and the length of the heating section is the length of the induction heating mechanism for heating the ferritic stainless steel jacket, and its length is 20%-45% of the length of the aluminum alloy roll body, Preferably it is 30%.

Example 2

On the basis of Embodiment 1, this embodiment provides a method for processing a high-speed rotating aluminum alloy hot roller, which includes: connecting the motor shaft 12 and the aluminum alloy roller body 3 through a stainless steel connection taper sleeve 13; Heating mechanism 2, the induction heating mechanism 2 is arranged in the inner hole of one end of the aluminum alloy roller body; a ferritic stainless steel sleeve 4 is tightly fixed in the heating section of the aluminum alloy roller body 3, so that the induction heating mechanism 2 passes through the ferritic stainless steel The steel sleeve 4 conducts heat to the aluminum alloy roller body 3; by opening the aluminum alloy roller body 3 with a number of heat pipe holes 5 arranged around the aluminum alloy roller body 3 and along the axial direction of the aluminum alloy roller body 3, so that the One end of each heat pipe hole 5 is close to the high-speed permanent magnet motor 11 , and one end of each heat pipe hole 5 away from the high-speed permanent magnet motor 11 is communicated in the aluminum alloy roller body 3 , and each heat pipe hole 5 is connected to the aluminum alloy roller body 3 by the blocking ring 6 . Sealing; the high-frequency current is connected to the induction heating mechanism 2 to generate an alternating magnetic field to heat the aluminum alloy roller body 3 .

In this embodiment, an aluminum alloy material with a silicon content of 26% and a fast-setting-powder metallurgy process is used, with a linear expansion coefficient of 1.5x10-5/°C, a normal temperature tensile strength of 290mpa, and a 300°C tensile strength of 160mpa; The aluminum alloy roller body 3 is obtained by processing the aluminum alloy material, and 44 inclined holes with a slope of 1.2°, a diameter of 6mm, and a spacing of 10mm are punched from the 11 end away from the high-speed permanent magnet motor, and are machined to connect the roots. Finally, plugging is performed; the ferritic stainless steel sleeve 4 is made of ferritic stainless steel, and its length is equivalent to that of the induction coil of the high-frequency induction coil assembly, accounting for 30% of the total length of the aluminum alloy roller body 3; the ferritic stainless steel sleeve is 4 and the aluminum alloy roller body 3 are connected by welding to achieve the effect of tight connection; the high-frequency magnetic field generated by the high-frequency induction coil assembly makes the ferritic stainless steel sleeve 4 heat rapidly, and transmits it to the aluminum alloy aluminum alloy roller body 3 The heating section makes the heating section heat up rapidly. The heat medium liquid of about 30% of the heat pipe cavity volume is added to the heat pipe hole 5. With the help of centrifugal force, the heat medium liquid is mostly concentrated in the heating section of the aluminum alloy roller body 3, and the liquid will be absorbed. Rapid heating and gasification, spreads along the heat pipe hole 5 to the end away from the high-speed permanent magnet motor 11, and the cooled liquid flows back along the pipe wall to the heating section to continue heating and gasification. This process repeats itself to ensure a continuous and stable heat load. , so that the temperature of the aluminum alloy roller body 3 is kept within the range required by the process; the temperature is related to the vapor pressure, and under a certain pressure, the temperature of the vapor and the temperature of the liquid are the same, so the entire aluminum alloy roller body 3 is It can maintain a basically consistent temperature, and the amount of the heating medium liquid added is basically the same as the volume of the heat pipe cavity in the heating section, which can ensure the efficient heating of the heating medium in the heating section; The length is only less than half of the length of the aluminum alloy roller body 3. The induction electromagnetic heating system heats the liquid medium in a concentrated manner, and quickly converts the heat generated by the electromagnetic eddy current into the latent heat of vaporization, which maximizes the efficiency of the heat pipe effect. It can strictly prevent the electrochemical reaction between the heat medium and the aluminum alloy in the high temperature environment, and the non-condensable gas is generated to produce gas resistance (that is, the vapor pressure is inconsistent with the temperature), so that the characteristics of uniform vapor-liquid equilibrium temperature are invalid; Rotating at 1000rpm, the set temperature is 120°C, it only takes 5 minutes to reach the set temperature from room temperature, and the roll surface temperature is measured after balancing for 4 minutes. Continue to heat up to 180°C and increase the rotational speed to 4500rpm. After balancing, the measured roll surface temperature deviation of the aluminum alloy roller body 3 is less than 1.5°C, which reflects the high efficiency heat transfer advantage of the aluminum alloy hot roller.

In this embodiment, the aluminum alloy material prepared by the AlFeVSi fast-setting-spray forming-extrusion and spinning or forging process has a linear expansion coefficient of 2.1x10-5/℃, a normal temperature tensile strength of 350mpa, and a tensile strength of 300℃. Strength 180mpa. Process the aluminum alloy roller body 3 as shown in the figure, and punch 44 oblique holes with a slope of 0.7°, a diameter of 6mm, and a spacing of 12mm from the 11 end away from the high-speed permanent magnet motor. Blockage; the ferritic stainless steel sleeve 4 is made of ferritic stainless steel, and its length is equal to that of the induction coil, accounting for 33% of the total length of the aluminum alloy roller body 3. The ferritic stainless steel sleeve 4 and the aluminum alloy aluminum alloy roller body 3 are closely connected by welding; the high-frequency magnetic field generated by the induction coil makes the ferritic stainless steel sleeve 4 heat up quickly, and is transmitted to the heating section of the aluminum alloy aluminum alloy roller body 3, so that the heating section heats up rapidly; The heat medium liquid is about 33% of the cavity volume of the heat pipe. With the help of the centrifugal force, the heat medium liquid is concentrated in the heating section of the aluminum alloy roller body 3, and the liquid will be heated and finally vaporized, and the liquid will be heated to the end of the aluminum alloy roller body 3A along the heat pipe. Diffusion, the cooled liquid flows back along the pipe wall to the heating section to continue heating and gasification; the temperature is related to the vapor pressure, and under a certain pressure, the temperature of the vapor and the liquid are the same, so the entire aluminum alloy roller body 3 It can maintain a basically consistent temperature; the amount of heat medium liquid added is basically the same as the volume of the heat pipe cavity in the heating section, which can ensure the efficient heating of the heat medium in the heating section; through the efficient heat transfer of aluminum alloy materials, high-frequency induction heating The length of the coil and the length of the heating section of the aluminum alloy roller body 3 are only about one-third of the length of the aluminum alloy roller body 3. The induction electromagnetic heating system heats the liquid medium in a concentrated manner, and quickly converts the heat generated by the electromagnetic eddy current into the latent heat of vaporization, which maximizes efficiency. Heat pipe effect. The hot roller assembled according to the above requirements rotates at 1000 rpm, and the set temperature is 120 °C. It only takes 5 minutes from room temperature to reach the set temperature. After balancing for 4 minutes, measure the temperature of the roller surface, and the temperature difference between the four points is ± 0.5°C (actually the measurement error); continue to heat up to 180°C and increase to 6000rpm. After balancing, the measured roll surface temperature deviation is less than 1.5°C, which reflects the high efficiency heat transfer advantage of aluminum alloy hot rollers.

In this embodiment, the ferritic stainless steel sleeve 4 and the aluminum alloy roller body 3 are fixedly connected by welding, threading, high temperature resistant glue, etc., and the inner surface of the heat pipe hole 5 is reduced by the friction coefficient and further anti-corrosion surface. At the same time, ensure that the distance between each heat pipe hole 5 and the surface of the aluminum alloy roller body 3 is equal.

In this embodiment, the high-speed rotating aluminum alloy hot roll processing method is suitable for processing the high-speed rotating aluminum alloy hot roll as provided in Example 1.

In this embodiment, the high-speed rotating aluminum alloy heat roller has been clearly explained in Embodiment 1.

To sum up, the present invention adopts welding, threading, high temperature resistant glue and other fixed connection methods between the ferritic stainless steel sleeve and the aluminum alloy roller body, and the inner surface of the heat pipe hole is subjected to reduced friction coefficient and anti-corrosion surface treatment. At the same time, it is ensured that the distance between each heat pipe hole and the surface of the aluminum alloy roller body is equal, and a ferritic stainless steel sleeve that is closely connected with it is set in the heating section of the aluminum alloy roller body as a heat source under the action of the induced current, and then the aluminum alloy is used. The high heat transfer performance of the alloy material aluminum alloy roller body transfers heat to the heat medium in the heat pipe hole and vaporizes it, and realizes the effect of uniform heating of the aluminum alloy roller body through heat conduction.

All components selected in this application (components with no specific structure described) are general standard components or components known to those skilled in the art, and their structures and principles are known to those skilled in the art through technical manuals or through routine experimental methods informed.

In the description of the embodiments of the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or It can be connected in one piece; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention.

Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

Taking the above ideal embodiments according to the present invention as inspiration, and through the above description, relevant personnel can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the contents in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

A high-speed rotating aluminum alloy hot roller is characterized in that, comprising:

Motor mechanism, induction heating mechanism, aluminum alloy roller body and temperature control unit; wherein

The motor mechanism includes: a high-speed permanent magnet motor and a motor shaft;

A stainless steel connecting cone sleeve is fixed on the aluminum alloy roller body, the motor shaft is connected with the aluminum alloy roller body through the stainless steel connecting cone sleeve, the induction heating mechanism is fixed on the connecting seat, and the induction heating mechanism is arranged on the aluminum alloy roller body. In the inner hole of one end of the alloy roll body, namely

The high-speed permanent magnet motor drives the motor shaft to rotate to drive the aluminum alloy roller body to rotate, and the temperature control unit controls the induction heating mechanism to inductively heat the aluminum alloy roller body.
The high-speed rotating aluminum alloy hot roller according to claim 1, characterized in that,

The induction heating mechanism includes: a high-frequency induction coil assembly;

The high-frequency induction coil assembly is connected to a high-frequency current to generate an alternating magnetic field to heat the aluminum alloy roller body.
The high-speed rotating aluminum alloy hot roller according to claim 2, characterized in that,

The inner surface of the heating section on the aluminum alloy roller body is embedded with a ferritic stainless steel sleeve, and the high-frequency induction coil assembly heats the ferritic stainless steel sleeve by induction to conduct heat to the aluminum alloy roller body.
The high-speed rotating aluminum alloy hot roller according to claim 3, characterized in that,

The aluminum alloy roller body is provided with a plurality of heat pipe holes arranged around the aluminum alloy roller body and arranged along the axial direction of the aluminum alloy roller body;

One end of each heat pipe hole is close to the high-speed permanent magnet motor, and one end of each heat pipe hole away from the high-speed permanent magnet motor is communicated in the aluminum alloy roller body, and each heat pipe hole is sealed with the aluminum alloy roller body by a blocking ring.
The high-speed rotating aluminum alloy hot roller according to claim 1, characterized in that,

The temperature control unit includes a temperature transmitter and a temperature sensor;

The temperature sensor of the temperature control unit is embedded on the aluminum alloy roller body; the temperature transmitter is installed on the high-speed permanent magnet motor, and the temperature transmitter is electrically connected with the induction heating mechanism. And the temperature sensor controls the induction heating mechanism.
The high-speed rotating aluminum alloy hot roller according to claim 2, characterized in that,

The high-speed rotating aluminum alloy heat roller also includes: an over-temperature protector;

The over-temperature protector is installed on the connection seat, and the probe of the over-temperature protector is not in contact with the end face of the aluminum alloy roller body;

The over-temperature protector is suitable for detecting the temperature data of the end face of the aluminum alloy roller body, and controlling the disconnection and alarming of the high frequency induction coil assembly according to the end face temperature data of the aluminum alloy roller body.
The high-speed rotating aluminum alloy hot roller according to claim 4, characterized in that,

The heat pipe holes are inclined holes, and the inclination of each heat pipe hole away from the end of the high-speed permanent magnet motor to the end of the heat pipe hole close to the high-speed permanent magnet motor is 0.5°-2.5°, and the direction of the inclination is the heat pipe hole close to the end of the high-speed permanent magnet motor. Near the outer surface of the aluminum alloy roller, the number of heat pipe holes is 20-80, and the distance between adjacent heat pipe holes is 6 mm -20mm, the wall thickness of the aluminum alloy roller body is 15 mm-60mm, the diameter of the heat pipe hole is 3mm-15mm;

Each heat pipe hole is on the same plane as the central axis of the aluminum alloy roll body.
The high-speed rotating aluminum alloy hot roller according to claim 4, characterized in that,

The aluminum alloy roller body is provided with a heating section and a heat transfer section. The length of the heating section is the length of the induction heating mechanism for heating the ferritic stainless steel jacket, and its length is 20%-45% of the length of the aluminum alloy roller body.
A method for processing high-speed rotating aluminum alloy hot rolls, comprising:

The motor shaft is connected with the aluminum alloy roller body through the stainless steel connecting cone sleeve;

The induction heating mechanism is connected through the connection seat, and the induction heating mechanism is arranged in the inner hole of one end of the aluminum alloy roller body;

A ferritic stainless steel sleeve is tightly fixed in the heating section of the aluminum alloy roller body, so that the induction heating mechanism conducts heat to the aluminum alloy roller body through the ferritic stainless steel sleeve;

By opening a number of heat pipe holes in the aluminum alloy roller body, which are arranged around the aluminum alloy roller body and along the axial direction of the aluminum alloy roller body, one end of each heat pipe hole is close to the high-speed permanent magnet motor, and each heat pipe hole is far away from the high-speed permanent magnet motor. One end of the heat pipe is communicated in the aluminum alloy roller body, and each heat pipe hole is sealed with the aluminum alloy roller body through the blocking ring;

The high-frequency current is connected to the induction heating mechanism to generate an alternating magnetic field to heat the aluminum alloy roller body.
The high-speed rotating aluminum alloy hot roll processing method according to claim 9, wherein,

The high-speed rotating aluminum alloy hot roll processing method is suitable for processing the high-speed rotating aluminum alloy hot roll according to any one of claims 1-8.