CN212335371U - High-speed rotating gradient heat pipe type hot roller - Google Patents
High-speed rotating gradient heat pipe type hot roller Download PDFInfo
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- CN212335371U CN212335371U CN202021402655.9U CN202021402655U CN212335371U CN 212335371 U CN212335371 U CN 212335371U CN 202021402655 U CN202021402655 U CN 202021402655U CN 212335371 U CN212335371 U CN 212335371U
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Abstract
The utility model relates to a high-speed rotatory gradient heat pipe formula hot-rolling, this high-speed rotatory gradient heat pipe formula hot-rolling includes: the device comprises a high-speed permanent magnet motor, a motor shaft, an induction heating mechanism, a roller body and a temperature control unit; a plurality of gradient heat pipe holes which are annularly distributed on the periphery of the roller body and are axially arranged along the roller body are formed in the roller body; the high-speed permanent magnet motor drives the motor shaft to rotate so as to drive the roller body to rotate, the induction heating mechanism is used for carrying out induction heating on the heating section on the roller body, and heat is conducted to the high-inclination section along the low-inclination section through heat medium steam in the gradient heat pipe hole so as to heat the heating section and the heat transfer section of the roller body; the utility model discloses a set up a plurality of gradient heat pipe holes in the hot-rolling, be suitable for steel material, aluminum alloy material roll body, can reduce the quality of whole hot-rolling to can suitably increase the length of roll body or reduce the stress to the bearing, make roll body heat transfer efficiency higher, reach the better homogeneity of roll surface temperature.
Description
Technical Field
The utility model belongs to the technical field of the chemical fiber draft hot-rolling, concretely relates to high-speed rotatory gradient heat pipe formula hot-rolling.
Background
In the heat treatment process of synthetic fiber, the induction heating roller body is an ideal heating roller form, and a heat pipe technology is adopted in order to improve the uniformity of the surface temperature distribution of the roller body.
For a steel roller body, a heat source of the induction heating roller is the roller body, or for a roller body made of an aluminum alloy material, the inner wall of the roller body can be tightly connected with a circle of ferrite stainless steel sleeve structure for induction heating, the roller body belongs to a direct heating mode, and the temperature controllability and the responsiveness of the roller body are superior to those of the roller bodies of any other indirect heating modes. An alternating magnetic field is generated after alternating current is introduced into an induction coil which generates magnetic lines inside the roller body, and induced voltage in the circumferential direction of the roller body generates current (eddy current), so that the roller body generates heat. When the induction coil stops being electrified, the roller body stops heating at the same time. Therefore, the temperature of the surface of the roller body is always monitored, and the result is fed back to the power supply side to form a simple control loop, so that the temperature of the roller body can be accurately kept constant.
The heat pipes are distributed in the cylinder wall of the heat pipe type induction heating roller body and can be called as an interlayer space on the cylinder wall of the roller body. The heat transfer medium is encapsulated in the small space under vacuum state, the interlayer is always filled with the vapor of the medium, and the vapor is controlled to reach the saturated vapor pressure corresponding to the temperature. If a part of the surface of the roller body is subjected to a heat load, the temperature of the roller surface is lower than that of the rest part, and the saturated vapor pressure in the vicinity of the part is reduced. Thus, the surrounding steam flow is rapidly concentrated therein, and the temperature is returned to the original temperature by the heat of vaporization due to the condensation of the steam. Conversely, if one portion is at a higher temperature than the rest, the medium boils and evaporates, spreading the heat away. This cycle of evaporation and condensation continues until the temperature difference is eliminated. This enables automatic compensation adjustment to maintain the temperature balance without external operation, and has high heat transfer efficiency by means of heat transfer of the heating medium vapor.
However, the situation is very different when the chemical fiber is drawn at high speed in the production process. The high-speed drawing roller has two characteristics, one is high-speed operation, the linear speed can reach 1000-plus-6000 m/min, the rotating speed of the roller body can reach 1000-plus-10000 rpm, and thus, the centrifugal force can be very large; secondly, because of the operation requirement, the roller body is connected with the motor shaft, so that the stress of the motor shaft at the shaft seat is large, and the weight and the length of the roller body are limited.
Firstly, under the high-speed rotation, the heat medium liquid in the heat pipe is distributed on the outer side of the heat pipe and the induction heating surface is arranged on the inner side of the heat pipe due to the action of centrifugal force; the depth of induction heating is limited to a certain extent, and this is related to the frequency of induction heating, and the frequency is high and the heating depth is shallow. In order to improve the heating efficiency, high-frequency heating is generally required, and the depth of the high-frequency heating is very limited and generally does not exceed 2.5 mm. Therefore, in the process of high-speed rotation operation, a certain distance still exists between the heating layer and the heating medium liquid layer, and the heating layer and the heating medium liquid layer can be actually realized only by relying on heat transfer of the roller body. In order to increase the induction heating depth, a low-frequency heating mode can be adopted, but the heating efficiency is influenced; in the above induction heating manner, the heat pipes are distributed in the wall of the roller body in parallel to the central shaft, the whole length of the roller body is required to be heated, the weight of the roller body in the axial direction is basically uniformly distributed, but for the motor shaft seat, the stress applied is increased in a square relation along with the increase of the length of the roller body (lever principle), so that the diameter and the length of the roller body are limited in this manner, and the optimal setting of process parameters is influenced.
Aiming at the situation, the existing improved method is that a high-speed rotating heat pipe type hot roller and a heat transfer processing method thereof adopt an inclined hole type heat pipe, one end of the hot roller is closed, the other end of the hot roller is provided with a plurality of heat pipe holes and then is closed, the inclination of the heat pipe holes is 0.7-1.2 degrees, the root parts of the heat pipe holes are communicated, and the heat pipe holes are sealed integrally; the length of the heating section is shortened to 30-45% of the length of the roller body. Due to the design of the inclined holes, when the heat pipe runs at a high speed, the heat medium liquid can flow back to the heating section at the B end of the roller body by virtue of centrifugal force to be heated, and steam generated after heating is diffused to the A end of the roller body to realize the purpose of efficient heat transfer; in particular, when the centrifugal force is too small to overcome the friction of the liquid on the heat pipe wall, the back flow cannot be performed, i.e., the minimum slope of the inclined hole is limited by the friction coefficient of the heat pipe wall to the liquid.
According to calculation, the tangent value of the critical slope is equal to the friction coefficient of the liquid on the wall surface of the heat pipe, and in order to accelerate the flow speed of the heat medium liquid, the slope of the heat pipe can be increased or the smoothness of the inner surface of the heat pipe is increased, which is not beneficial to roller body design and processing technology.
Moreover, the design of the inclined holes is also negative relative to the heat effect of the roller surface, namely, the heat source of the heat transfer section of the roller body is heat medium vapor diffusion, but the angle of the inclined holes makes the heat pipe deflect to the inner side of the roller body; in the heating section close to the motor, the heat pipe is deviated to the outer side of the roller body and is far away from the induction heating surface, so that the problem of insufficient high-frequency induction heating depth exists, and the heating section is particularly suitable for a hot roller with larger length; the distance from the heat pipe of the heat transfer section of the roller body to the outer surface of the roller body is 5-8mm at most. The problem of large distance from the heat pipe to the roller surface exists; the roller surface temperature required by the process is uniform, namely the temperature in the heat pipe is consistent, but the different heat transfer distances increase the temperature nonuniformity of the roller surface.
Therefore, it is necessary to develop a new high-speed gradient heat pipe hot roller to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high-speed rotatory gradient heat pipe formula hot-rolling.
In order to solve the technical problem, the utility model provides a high-speed rotatory gradient heat pipe formula hot-rolling, it includes: the device comprises a high-speed permanent magnet motor, a motor shaft, an induction heating mechanism, a roller body and a temperature control unit; the induction heating mechanism is arranged in an inner hole at one end of the roller body, and a plurality of gradient heat pipe holes which are annularly distributed around the roller body and are axially arranged along the roller body are formed in the roller body; the roller body is provided with a heating section and a heat transfer section, the heating section and the heat transfer section respectively correspond to the low-gradient section and the high-gradient section on the gradient heat pipe hole, namely, the high-speed permanent magnet motor drives the motor shaft to rotate so as to drive the roller body to rotate, the temperature control unit controls the induction heating mechanism to perform induction heating on the heating section on the roller body, and heat is conducted to the high-gradient section along the low-gradient section through heat medium steam in the gradient heat pipe hole so as to heat the heating section and the heat transfer section of the roller body.
Furthermore, the gradient heat pipe hole adopts at least two-stage gradient, the slope of the low slope section is 0-0.5 degrees, and the slope of the high slope section is 0.5-2.5 degrees.
Furthermore, the inner diameters of the heat pipes of the low-gradient section and the high-gradient section in the same gradient heat pipe hole are consistent in size and are smoothly communicated.
Further, the induction heating mechanism includes: a high frequency induction coil assembly; the high-frequency induction coil assembly is connected with high-frequency current to generate an alternating magnetic field to heat the roller body.
Furthermore, one end of each gradient heat pipe hole is close to the high-speed permanent magnet motor, one end of each gradient heat pipe hole, which is far away from the high-speed permanent magnet motor, is communicated in the roller body, and each gradient heat pipe hole and the roller body are sealed through a plugging ring.
Further, the high-speed rotation gradient heat pipe type heat roller further includes: an overtemperature protector; the over-temperature protector is arranged on the connecting seat, and a probe of the over-temperature protector is not in contact with the end face of the roller body; the overtemperature protector is suitable for detecting the temperature data of the end face of the roller body and controls the disconnection and the alarm of the high-frequency induction coil assembly according to the temperature data of the end face of the roller body.
Further, the high-speed rotation gradient heat pipe type heat roller further includes: a rotary transformer; the rotary transformer is arranged on a base of the high-speed permanent magnet motor and is electrically connected with the high-speed permanent magnet motor; the rotary transformer is suitable for adjusting the rotating speed precision of the high-speed permanent magnet motor.
The beneficial effects of the utility model are that, the utility model discloses a just set up a plurality of gradient heat pipe holes along the roll body axial around the roll body, can be suitable for steel material, aluminum alloy material roll body, can reduce the quality of whole hot-rolling, can suitably increase the length of roll body or reduce the stress to the bearing, make roll body heat transfer efficiency higher, reach the better homogeneity of roll surface temperature.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a view showing a structure of a high-speed rotation gradient heat pipe type heat roller according to the present invention;
FIG. 2 is a block diagram of a gradient heat pipe aperture of the present invention;
fig. 3 is an internal cross-sectional view of the roll body of the present invention.
In the figure:
the high-speed permanent magnet motor comprises a high-speed permanent magnet motor 1, a motor shaft 2, a stainless steel connecting taper sleeve 201, an induction heating mechanism 3, a connecting seat 301, a roller body 4, a gradient heat pipe hole 5, a low-gradient section 501, a high-gradient section 502, a ferritic stainless steel sleeve 6, a blocking ring 7, a temperature control unit 8, an over-temperature protector 9, a rotary transformer 10 and a plug 11.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
FIG. 1 is a view showing a structure of a high-speed rotation gradient heat pipe type heat roller according to the present invention.
In the present embodiment, as shown in fig. 1, the present embodiment provides a high-speed rotation gradient heat pipe type heat roller including: the device comprises a high-speed permanent magnet motor 1, a motor shaft 2, an induction heating mechanism 3, a roller body 4 and a temperature control unit 8; the induction heating device comprises a roller body 4, a stainless steel connecting taper sleeve 201, a motor shaft 2, a connecting seat 301, an induction heating mechanism 3, a plurality of gradient heat pipe holes 5 and a plurality of gradient heat pipe holes, wherein the stainless steel connecting taper sleeve 201 is fixedly connected to the roller body 4, the motor shaft 2 is connected with the roller body 4 through the stainless steel connecting taper sleeve 201, the induction heating mechanism 3 is fixed on the connecting seat 301, the induction heating mechanism 3 is arranged in an inner hole at one end of the roller body 4, and the roller body 4 is; the roller body 4 is provided with a heating section and a heat transfer section, the heating section and the heat transfer section respectively correspond to the low-gradient section 501 and the high-gradient section 502 on the gradient heat pipe hole 5, namely the high-speed permanent magnet motor 1 drives the motor shaft 2 to rotate so as to drive the roller body 4 to rotate, the temperature control unit 8 controls the induction heating mechanism 3 to perform induction heating on the heating section on the roller body 4, and heat is conducted to the high-gradient section 502 along the low-gradient section 501 through heat medium steam in the gradient heat pipe hole 5 so as to heat the heating section and the heat transfer section of the roller body 4.
In the present embodiment, the temperature control unit 8 can be, but is not limited to, a temperature transmitter; the temperature transmitter is installed on the base of the high-speed permanent magnet motor and is electrically connected with the induction heating mechanism, and the temperature transmitter is suitable for being matched with the temperature control unit to achieve current frequency adjustment of the induction heating mechanism.
In this embodiment, the roller body 4 may be made of, but not limited to, steel or aluminum alloy.
In this embodiment, this embodiment is through around roll body 4 and along roll body 4 axial set up a plurality of gradient heat pipe holes 5, can be suitable for steel material, aluminum alloy material roll body 4, can reduce the quality of whole hot-rolling, can suitably increase the length of roll body 4 or reduce the stress to the bearing, make roll body 4 heat transfer efficiency higher, reach the better homogeneity of roll surface temperature.
Fig. 2 is a structural view of a gradient heat pipe hole according to the present invention.
In this embodiment, as shown in FIG. 2, where the arrows indicate the direction of heat transfer, the gradient heat pipe holes 5 have at least two gradients, with the low slope sections 501 having a slope of 0-0.5, preferably 0, and being arranged substantially horizontally, and the high slope sections 502 having a slope of 0.5-2.5, preferably 1.5.
In the present embodiment, the heat pipe inner diameters of the low-slope section 501 and the high-slope section 502 are consistent and smoothly communicated in the same gradient heat pipe hole 5.
In the present embodiment, the induction heating mechanism 3 includes: a high frequency induction coil assembly; the high-frequency induction coil assembly is connected with high-frequency current to generate an alternating magnetic field to heat the roller body 4.
In this embodiment, as an optional implementation mode that the roller body is made of an aluminum alloy material, the roller body 4 is embedded with a ferritic stainless steel sleeve 6 at a position corresponding to the induction heating mechanism 3, and the induction heating mechanism 3 heats the roller body 4 through the ferritic stainless steel sleeve 6.
When the roller body is made of aluminum alloy, the induction coil of the high-frequency induction coil assembly cannot be directly heated, so that a ferrite stainless steel sleeve 6 is arranged at a heating section of the aluminum alloy roller body corresponding to the induction heating mechanism 3 for heating; because the aluminum alloy material has good heat transfer, the heating section can be small; the weight of the entire heat roller can be reduced.
In this embodiment, as an optional implementation mode that the roller body is made of steel, the induction heating mechanism 3 can directly heat the roller body 4, and because the heat transfer efficiency of the plurality of gradient heat pipe holes 5 is higher, the uniformity of the roller surface temperature can be better, and the quality of the whole hot roller is reduced.
In this embodiment, the heating section of the roller body 4 is heated by high-frequency electromagnetic heating, the heating object is a liquid medium, the liquid medium is water or naphthalene, for example, deionized water or distilled water has a working temperature lower than 200 ℃ when the medium is water, and has a working temperature lower than 350 ℃ when the medium is naphthalene; and high-frequency electromagnetic heating is adopted, and the power selection is related to the heat dissipation of the roller surface and the primary heating rate.
In this embodiment, the vacuum degree of the closed cavity of the gradient heat pipe hole 5 needs to reach below 100pa, the liquid heat medium can be injected, the liquid heat medium with the heat medium liquid addition amount except the heat medium steam (the steam amount is related to the temperature and the pressure) is filled in the low-gradient heat pipe cavity, the low-gradient section 501 is at 0 gradient, namely, the low-gradient section is axially horizontal to the roller body 4, the heating and gasification of the heat medium in the heating section and the cyclic reciprocation of the condensation and backflow in the heat transfer section can not be influenced, the heat transfer sizes of the heating section and the heat transfer section can be reduced, the wall thickness of the roller body 4 can also be reduced, thereby the quality of the whole heat roller is reduced, the length of the roller body 4 can be properly increased or the stress on a bearing can be reduced, the size parameter of the roller body 4 can be optimized on the premise that the high-speed rotation gradient heat.
In the present embodiment, the roller body 4 is provided with a ferritic stainless steel sleeve 6 as a heating section, the length of which is 20% to 45%, preferably 30%, of the length of the roller body 4.
Fig. 3 is an internal cross-sectional view of the roll body of the present invention.
In this embodiment, as shown in fig. 3, one end of each gradient heat pipe hole 5 is close to the high-speed permanent magnet motor 1, one end of each gradient heat pipe hole 5 far from the high-speed permanent magnet motor 1 is communicated in the roller body 4, and each gradient heat pipe hole 5 and the roller body 4 are sealed by the plugging ring 7.
In this embodiment, after the gradient heat pipe holes 5 are opened close to the end of the high-speed permanent magnet motor 1, the end is sealed by a plug 11.
In the embodiment, the distance from each gradient heat pipe hole 5 to the central shaft away from the end of the high-speed permanent magnet motor 1 is small; the distance between the end of each gradient heat pipe hole 5 close to the high-speed permanent magnet motor 1 and the central shaft is large; the distance between adjacent gradient heat pipe holes 5 is 6 mm-20 mm, preferably 12mm, the wall thickness of the roller body 4 is 15 mm-60mm, preferably 35mm, and the diameter of the gradient heat pipe hole 5 is 3mm-15mm, preferably 7 mm; the gradient heat pipe holes 5 and the central shaft of the roller body 4 are in the same plane.
In this embodiment, the high-speed rotation gradient heat pipe type heat roller further includes: an overtemperature protector 9; the over-temperature protector 9 is arranged on the connecting seat 301, and a probe of the over-temperature protector 9 is not in contact with the end face of the roller body 4; the overtemperature protector 9 is suitable for detecting the end face temperature data of the roller body 4 and controlling the disconnection and alarm of the high-frequency induction coil assembly according to the end face temperature data of the roller body 4.
In this embodiment, the high-speed rotation gradient heat pipe type heat roller further includes: a rotary transformer 10; the rotary transformer 10 is arranged on a base of the high-speed permanent magnet motor 1, and the rotary transformer 10 is electrically connected with the high-speed permanent magnet motor 1; the rotary transformer 10 is adapted to adjust the rotational speed accuracy of the high-speed permanent magnet motor 1.
In this embodiment, the temperature of the roller body 4 is controlled by whether the induction coil of the high-frequency induction coil assembly is energized or not, and the overtemperature protection and alarm of the roller body 4 can be realized by the overtemperature protector 9.
Example 2
In the embodiment, the low-slope section 501 of the gradient heat pipe hole 5 is drilled from the end close to the high-speed permanent magnet motor 1, the high-slope section 502 of the gradient heat pipe hole 5 is drilled from the end far away from the high-speed permanent magnet motor 1, and the guide holes are controlled by an electronic dividing head, so that the orifices of the low-slope section 501 and the high-slope section 502 are opposite and smoothly connected, and the orifice position difference is not more than 0.1 mm; and the angles of all orifices are consistent, and the deviation is not more than 3%; the gradient heat pipe holes 5 close to the high-speed permanent magnet motor 1 end are independently sealed, and the pipe orifices far away from the high-speed permanent magnet motor 1 end are communicated with the roots of the gradient heat pipe holes 5 through machining so as to be integrally sealed.
In this embodiment, as an embodiment of using aluminum alloy as the roller body, taking an aluminum alloy roller body 4 Φ 250 × 480mm for the polyester FDY process as an example, assuming that 35% of the length of the roller body 4 is used as the heating section, i.e. the low gradient section 501, the Φ 6 × 460mm hole is also punched to form an angle of 1 ° with the roller center line, relative to the central axis of the roller body 4, the distance of the gradient heat pipe hole 5 near the high-speed permanent magnet motor 1 end is 5.2mm greater than the distance of the gradient heat pipe hole 5 away from the high-speed permanent magnet motor 1 end, the roller body 4 uses a heat pipe heat transfer method, the heating section is filled with the heating medium liquid basically, the heating section does not need an inclined pipe or only uses a low gradient pipe, once the roller body 4 rotates at high speed, the liquid phase medium is concentrated in the power frequency heating section of the roller body 4, and since the aluminum alloy roller body 4 is used, the heat transfer, the induction electromagnetic heating system heats the liquid medium in a centralized way, so that the heat generated by the electromagnetic eddy current is quickly converted into latent heat of vaporization, and the heat pipe effect is exerted to the maximum efficiency; the inner wall of the vacuum heat pipe of the roller body 4 is required to be purified and subjected to anti-corrosion treatment, so that the electrochemical reaction between a medium and metal in a high-temperature environment is strictly prevented, the generated non-condensable gas generates gas resistance (namely the steam pressure and the temperature are inconsistent), the heat exchange of the roller surface is influenced, the characteristic that the steam-liquid equilibrium temperature is uniform is invalid, and the roller body 4 is also provided with a temperature sensor 81 so as to transmit a temperature signal to a temperature control system and control the work of a high-frequency generating source by output information to meet the requirement of temperature stability; the high-speed rotating gradient heat pipe type hot roller rotates at the rotating speed of 1000rpm, the set temperature is 120 ℃, the set temperature can be reached in only 4 minutes from room temperature, the surface temperature of the roller is measured after balancing for 4 minutes, the four-point quantity temperature difference is +/-0.4 ℃ (actually is a measurement error), and the uniform surface temperature is the most basic characteristic of the heat pipe type heat transfer vapor-liquid balance hot roller; the high-speed rotating gradient heat pipe type hot roller is continuously heated to 180 ℃ and is heated to 5000rpm, the temperature compensation function under the conditions of uniform temperature and large heat load in the heat pipe effect is displayed, and the actually measured roller surface temperature deviation is not more than 1.0 ℃.
In this embodiment, as an embodiment that the roller body is made of steel, taking a steel roller body 4 Φ 250 × 480mm used in the polyester FDY process as an example, assuming that 45% of the length of the roller body 4 is used as a heating section, i.e., a low gradient section 501, a Φ 6 × 460mm hole is also punched to form an angle of 1 ° with the center line of the roller, relative to the central axis of the roller body 4, the distance between the gradient heat pipe hole 5 and the high-speed permanent magnet motor 1 is only 4.4mm greater than the distance between the gradient heat pipe hole 5 and the high-speed permanent magnet motor 1, the roller body 4 adopts a heat pipe heat transfer mode, the heating section is basically filled with the heat medium liquid, the heating section does not need an inclined pipe or only needs a low gradient pipe, once the roller body 4 rotates at high speed, the liquid medium is concentrated in the heating section of the steel roller, for the high-frequency induction heating coil for the roller body 4, the length of the high-frequency induction electromagnetic, the heat generated by the electromagnetic eddy current is quickly converted into latent heat of vaporization, and the heat pipe effect is exerted with maximum efficiency; the inner wall of the vacuum heat pipe of the roller body 4 is required to be purified and subjected to anti-corrosion treatment, so that the electrochemical reaction between a medium and metal in a high-temperature environment is strictly prevented, the generated non-condensable gas generates gas resistance (namely the steam pressure and the temperature are inconsistent), the heat exchange of the roller surface is influenced, the characteristic that the steam-liquid equilibrium temperature is uniform is invalid, and the roller body 4 is also provided with a temperature sensor 81, so that a temperature signal is transmitted to a temperature control system, and then the work of a high-frequency generating source is controlled by output information to meet the requirement of temperature stability; the high-speed rotating gradient heat pipe type hot roller rotates at the rotating speed of 1000rpm, the set temperature is 120 ℃, the set temperature is reached within 5 minutes from room temperature, the surface temperature of the roller is measured after balancing for 4 minutes, the four-point quantity temperature difference is +/-0.5 ℃ (actually is a measurement error), and the uniform surface temperature is the most basic characteristic of the heat pipe type heat transfer vapor-liquid balance hot roller; the high-speed rotation gradient heat pipe type hot roller is continuously heated to 180 ℃ and the rotating speed is increased to 5000rpm, the temperature compensation function under the conditions of uniform temperature and large heat load in the heat pipe effect is displayed, and the actually measured roller surface temperature deviation is less than 1.2 DEG C
To sum up, the utility model discloses an it sets up a plurality of gradient heat pipe holes around the roll body and along the roll body axial, can be suitable for steel material, aluminum alloy material roll body, can reduce the quality of whole hot-rolling, can suitably increase the length of roll body or reduce the stress to the bearing, make roll body heat transfer efficiency higher, reach the better homogeneity of roll surface temperature.
The components selected for use in the present application (components not illustrated for specific structures) are all common standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experimentation.
In the description of the embodiments of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. A high-speed rotating gradient heat pipe type heat roller is characterized by comprising:
the device comprises a high-speed permanent magnet motor, a motor shaft, an induction heating mechanism, a roller body and a temperature control unit; wherein
The induction heating mechanism is arranged in an inner hole at one end of the roller body, and a plurality of gradient heat pipe holes which are annularly distributed around the roller body and are axially arranged along the roller body are formed in the roller body;
the roller body is provided with a heating section and a heat transfer section, and the heating section and the heat transfer section respectively correspond to the low-gradient section and the high-gradient section on the gradient heat pipe hole, namely
The high-speed permanent magnet motor drives the motor shaft to rotate so as to drive the roller body to rotate, the temperature control unit controls the induction heating mechanism to perform induction heating on the heating section on the roller body, and heat is conducted to the high-inclination section along the low-inclination section through heat medium steam in the gradient heat pipe hole so as to heat the heating section and the heat transfer section of the roller body.
2. A high-speed rotating gradient heat pipe heat roller as recited in claim 1,
the gradient heat pipe hole adopts at least two-stage gradient, the gradient of the low-gradient section is 0-0.5 degrees, and the gradient of the high-gradient section is 0.5-2.5 degrees.
3. A high-speed rotating gradient heat pipe heat roller as recited in claim 2,
the inner diameters of the heat pipes of the low-gradient section and the high-gradient section in the same gradient heat pipe hole are consistent in size and are smoothly communicated.
4. A high-speed rotating gradient heat pipe heat roller as recited in claim 1,
the induction heating mechanism includes: a high frequency induction coil assembly;
the high-frequency induction coil assembly is connected with high-frequency current to generate an alternating magnetic field to perform induction heating on the roller body.
5. A high-speed rotating gradient heat pipe heat roller as recited in claim 1,
one end of each gradient heat pipe hole is close to the high-speed permanent magnet motor, one end of each gradient heat pipe hole, which is far away from the high-speed permanent magnet motor, is communicated in the roller body, and each gradient heat pipe hole and the roller body are sealed through a plugging ring.
6. A high-speed rotating gradient heat pipe heat roller as recited in claim 1,
the high-speed rotation gradient heat pipe type heat roller further comprises: an overtemperature protector;
the over-temperature protector is arranged on the connecting seat, and a probe of the over-temperature protector is not in contact with the end face of the roller body;
the overtemperature protector is suitable for detecting the temperature data of the end face of the roller body and controls the disconnection and the alarm of the high-frequency induction coil assembly according to the temperature data of the end face of the roller body.
7. A high-speed rotating gradient heat pipe heat roller as recited in claim 1,
the high-speed rotation gradient heat pipe type heat roller further comprises: a rotary transformer;
the rotary transformer is arranged on a base of the high-speed permanent magnet motor and is electrically connected with the high-speed permanent magnet motor;
the rotary transformer is suitable for adjusting the rotating speed precision of the high-speed permanent magnet motor.
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| CN202021402655.9U CN212335371U (en) | 2020-07-16 | 2020-07-16 | High-speed rotating gradient heat pipe type hot roller |
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| CN202021402655.9U CN212335371U (en) | 2020-07-16 | 2020-07-16 | High-speed rotating gradient heat pipe type hot roller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111733468A (en) * | 2020-07-16 | 2020-10-02 | 无锡中力科技有限公司 | High-speed rotating gradient heat pipe type hot roller and processing method thereof |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111733468A (en) * | 2020-07-16 | 2020-10-02 | 无锡中力科技有限公司 | High-speed rotating gradient heat pipe type hot roller and processing method thereof |
| CN111733468B (en) * | 2020-07-16 | 2024-02-09 | 无锡中力科技有限公司 | High-speed rotating gradient heat pipe type hot roller and processing method thereof |
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