CN111733468B - High-speed rotating gradient heat pipe type hot roller and processing method thereof - Google Patents
High-speed rotating gradient heat pipe type hot roller and processing method thereof Download PDFInfo
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- CN111733468B CN111733468B CN202010686156.5A CN202010686156A CN111733468B CN 111733468 B CN111733468 B CN 111733468B CN 202010686156 A CN202010686156 A CN 202010686156A CN 111733468 B CN111733468 B CN 111733468B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/16—Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
Abstract
The invention relates to a high-speed rotating gradient heat pipe type heat roller and a processing method thereof, wherein the high-speed rotating gradient heat pipe type heat roller comprises: 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 around 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 conduction is carried out from the heating medium steam in the gradient heat pipe hole to the high-gradient section along the low-gradient section so as to heat the heating section and the heat transfer section of the roller body; the invention is suitable for the roller body made of steel materials and aluminum alloy materials by arranging the plurality of gradient heat pipe holes in the heat roller, can reduce the mass of the whole heat roller, and can properly increase the length of the roller body or reduce the stress on the bearing, so that the heat transfer efficiency of the roller body is higher, and the uniformity of the roller surface temperature is better.
Description
Technical Field
The invention belongs to the technical field of chemical fiber drafting heat rollers, and particularly relates to a high-speed rotating gradient heat pipe type heat roller and a processing method thereof.
Background
In the synthetic fiber heat treatment process, the induction heating roller body is in 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 the steel roller body, the heat source of the induction heating roller is the roller body, or for the roller body made of aluminum alloy, the inner wall of the roller body is tightly connected with a circle of ferrite stainless steel sleeve structure for induction heating, and 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 any other indirect heating mode. The induction coil which generates magnetic force lines inside the roller body generates an alternating magnetic field after being electrified with alternating current, and the induction voltage in the circumferential direction of the roller body generates current (vortex), so that the roller body generates heat. When the induction coil is stopped to be electrified, the roller body is heated and stopped 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 constant temperature of the roller body can be accurately maintained.
The heat pipes are distributed in the wall of the heat pipe type induction heating roller body and can be called as an interlayer space on the wall of the roller body. The heat transfer medium is encapsulated in the vacuum state in the small space, the interlayer is always filled with steam of the medium, and the temperature of the interlayer is controlled to reach the saturated vapor pressure corresponding to the temperature of the interlayer. If a part of the surface of the roll body is thermally loaded, the temperature of the roll surface of the part is lower than that of the rest part, and the saturated vapor pressure nearby the part is also reduced. In this way, the surrounding vapor flow is concentrated rapidly, and the vapor is condensed to release vaporization heat, thereby returning to the original temperature. Conversely, if a 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 is effectively self-compensating for adjustments to maintain temperature equilibrium without external manipulation and, depending on the heat transfer of the heating medium vapor, has a high heat transfer efficiency.
However, the conditions are very different for high-speed drafting in the chemical fiber production process. The high-speed drafting roller has two characteristics, namely, the high-speed running can reach the linear speed of 1000-6000m/min, the rotating speed of the roller body can reach 1000-10000rpm, and thus, the centrifugal force can be quite 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 due to the action of centrifugal force, and the induction heating surface is on the inner side of the heat pipe; the depth of induction heating is limited, and this is related to the frequency of induction heating, and the frequency is high and the heating depth is shallow. In order to increase the heating efficiency, high-frequency heating is generally required, and the depth of the high-frequency heating is very limited and generally not more than 2.5mm. Therefore, in the high-speed rotation operation process, a certain distance is still kept between the heating layer and the heating medium liquid layer, and the heat transfer of the roller body is actually realized. In order to increase the induction heating depth, a low-frequency heating mode can be adopted, but the heating efficiency is affected; in addition, in the above induction heating mode, the heat pipes are distributed in the cylinder wall of the roller body in parallel to the central axis, so that the whole length of the roller body is required to be heated, the weight of the roller body is basically uniformly distributed in the axial direction, but for a motor shaft seat, as the length of the roller body increases, the square relation of the stress is increased (lever principle), therefore, the diameter and the length of the roller body are limited, and the optimal setting of process parameters is influenced.
In view of the situation, the improved method is that a high-speed rotary heat pipe type heat roller and a heat transfer processing method thereof adopt inclined hole type heat pipes, one end of the heat roller is closed, the other end of the heat roller is provided with a plurality of heat pipe holes, the heat pipe holes are closed after being perforated, the inclination of the heat pipe holes is 0.7-1.2 degrees, each heat pipe Kong Genbu is communicated, and the whole is sealed; 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 pump is operated at high speed, the heat medium liquid can flow back to the heating section at the end B of the roller body by virtue of centrifugal force for heating, and vapor generated after heating is diffused to the end A of the roller body for realizing the purpose of high-efficiency heat transfer, but the inclination of the heat pipe is related to the backflow speed of the heat medium liquid, and the inclination is small, the centrifugal force is small, and the backflow speed is slow; in particular, when the centrifugal force is so small that it cannot overcome the friction of the liquid against the heat pipe walls, the backflow cannot be performed, i.e. the minimum slope of the inclined holes is limited by the friction coefficient of the heated pipe walls against the liquid.
According to calculation, the tangent value of the critical inclination is equal to the friction coefficient of the liquid on the wall surface of the heat pipe, so that the inclination of the heat pipe can be increased or the smoothness of the inner surface of the heat pipe can be increased to accelerate the flow speed of the heat medium liquid, which is not beneficial to the design and processing process of the roller body.
Furthermore, the design of the inclined holes is inversely related 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 biased to the outer side of the roller body and far away from the induction heating surface, so that the problem of insufficient high-frequency induction heating depth exists, especially for a heat roller with a larger length; and a maximum distance of 5-8mm from the heat pipe of the heat transfer section of the roller body to the outer surface of the roller body is approximately provided. The problem that the distance from the heat pipe to the roller surface is large exists; the temperature of the roller surface required by the process is uniform, namely the temperature in the heat pipe is uniform, but the different heat transfer distances increase the temperature non-uniformity of the roller surface.
Therefore, development of a new high-speed rotating gradient heat pipe type heat roller and a processing method thereof is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a high-speed rotating gradient heat pipe type hot roller and a processing method thereof.
In order to solve the technical problems, the invention provides a high-speed rotating gradient heat pipe type hot roller, which comprises: 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 roller body is fixedly connected with a stainless steel connecting taper sleeve, the motor shaft is connected with the roller body through the stainless steel connecting taper sleeve, the induction heating mechanism is fixed on the connecting seat and is arranged in an inner hole at one end of the roller body, and a plurality of gradient heat pipe holes which are distributed around the roller body in a surrounding manner 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 a low-inclination section and a high-inclination section on the gradient heat pipe hole, namely, the high-speed permanent magnet motor drives a 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.
Further, the gradient heat pipe hole adopts at least two stages of gradients, 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.
Further, the heat pipes of the low-inclination section and the high-inclination section in the same gradient heat pipe hole have the same inner diameter size and are communicated smoothly.
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.
Further, 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 the gradient heat pipe holes are sealed with the roller body through the plugging rings.
Further, the high-speed rotating gradient heat pipe type heat roller further comprises: an overtemperature protector; the overtemperature protector is arranged on the connecting seat, and a probe of the overtemperature protector is in non-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 controlling the high-frequency induction coil assembly to be disconnected and alarm according to the temperature data of the end face of the roller body.
Further, the high-speed rotating 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.
In another aspect, the present invention provides a high-speed rotating gradient heat pipe type hot roll processing method, comprising: fixedly connecting a stainless steel connecting taper sleeve on the roller body; a motor shaft is connected with the roller body through a stainless steel connecting taper sleeve; the induction heating mechanism is connected with the high-speed permanent magnet motor through a connecting seat and is arranged in an inner hole at one end of the roller body; the method comprises the steps that 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, one end of each gradient heat pipe hole is close to a 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 the gradient heat pipe holes are integrally sealed through blocking rings; the induction heating mechanism is connected with high-frequency current to generate an alternating magnetic field to heat the roller body.
Further, the low-gradient section of the gradient heat pipe hole is drilled from the position close to the high-speed permanent magnet motor end, the high-gradient section of the gradient heat pipe hole is drilled from the position far away from the high-speed permanent magnet motor end, and the guide hole is controlled by the electronic dividing head so that the orifices of the low-gradient section and the high-gradient section are relatively and smoothly connected; the gradient heat pipe holes near the end of the high-speed permanent magnet motor are sealed independently, and the drill hole far away from the end of the high-speed permanent magnet motor is machined to enable the root parts of the gradient heat pipe holes to be communicated so as to seal the whole.
Further, the high-speed rotating gradient heat pipe type heat roller processing method is suitable for processing the high-speed rotating gradient heat pipe type heat roller.
The invention has the beneficial effects that the gradient heat pipe holes are arranged around the roller body and along the axial direction of the roller body, so that the roller body is applicable to roller bodies made of steel materials and aluminum alloy materials, the mass of the whole heat roller can be reduced, the length of the roller body can be properly increased or the stress on a bearing can be reduced, the heat transfer efficiency of the roller body is higher, and the uniformity of the roller surface temperature is better.
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 above objects, features and advantages of the present invention more 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 that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a high-speed rotating gradient heat pipe thermo roll of the present invention;
FIG. 2 is a block diagram of a gradient heat pipe orifice 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 ferrite stainless steel sleeve 6, a blocking ring 7, a temperature control unit 8, an overtemperature protector 9, a rotary transformer 10 and a blocking 11.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
FIG. 1 is a block diagram of a high-speed rotating gradient heat pipe thermo roll of the present invention.
In this embodiment, as shown in fig. 1, this embodiment provides a high-speed rotating gradient heat pipe type heat roller, which includes: the 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 roller body 4 is fixedly connected with a stainless steel connecting taper sleeve 201, 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 a plurality of gradient heat pipe holes 5 which are distributed around the roller body 4 in a ring manner and are axially arranged along the roller body 4 are formed in the roller body 4; 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 heat the heating section on the roller body 4 in an induction way, 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 may employ, but is not limited to, a temperature transmitter; the temperature transmitter is arranged 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 realize the 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 sets up a plurality of gradient heat pipe holes 5 through just along roll body 4 axial around roll body 4, can be suitable for steel material, aluminum alloy material roll body 4, can reduce the quality of whole hot roll, can suitably increase the length of roll body 4 or reduce the stress to the bearing, makes roll body 4 heat transfer efficiency higher, reaches the better homogeneity of roll surface temperature.
FIG. 2 is a block diagram of a gradient heat pipe orifice of the present invention.
In this embodiment, as shown in fig. 2, the arrows indicate the heat transfer direction, the gradient heat pipe hole 5 adopts at least two stages of gradients, the low-gradient section 501 has a gradient of 0 ° -0.5 °, preferably 0 °, and is arranged substantially horizontally, and the high-gradient section 502 has a gradient of 0.5 ° -2.5 °, preferably 1.5 °.
In this embodiment, the heat pipes of the low slope section 501 and the high slope section 502 have uniform inner diameter sizes and are communicated smoothly in the same gradient heat pipe hole 5.
In this 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 alternative implementation mode that the roller body is made of an aluminum alloy material, a ferrite stainless steel sleeve 6 is embedded in a position, corresponding to the induction heating mechanism 3, of the roller body 4, and the induction heating mechanism 3 heats the roller body 4 through the ferrite 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 properly small; the weight of the whole heat roller can be reduced.
In this embodiment, as an alternative 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 gradient heat pipe holes 5 is higher, the uniformity of the roller surface temperature is better, and the quality of the whole heat roller is further reduced.
In this embodiment, the heating mode of the heating section of the roller body 4 is 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, when the medium is water, the working temperature is lower than 200 ℃, and when the medium is naphthalene, the working temperature is lower than 350 ℃; and high-frequency electromagnetic heating is adopted, and the power selection is related to roller surface heat dissipation and primary heating rate.
In this embodiment, the vacuum degree of the closed cavity of the gradient heat pipe hole 5 needs to be below 100pa, the liquid heat medium can be filled, the liquid heat medium except the heat medium vapor (the vapor 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, that is, the low-gradient section is axially horizontal to the roller body 4, the cyclic reciprocation of the heat medium in the heating section for heating and gasifying and condensing and refluxing in the heat transfer section is not 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 be reduced, so that 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 is reduced, the size parameter of the roller body 4 can be optimized on the premise that the use of the high-speed rotating gradient heat pipe type heat roller is not influenced, and the high-speed rotating heat pipe type heat roller is more reasonable and efficient.
In this embodiment, the roller body 4 is provided with a ferritic stainless steel jacket 6 as a heating section, the length of which is 20% -45% of the length of the roller body 4, preferably 30%.
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, which is far away from the high-speed permanent magnet motor 1, is communicated in the roller body 4, and the gradient heat pipe holes 5 and the roller body 4 are sealed by the plugging rings 7.
In this embodiment, after the end of each gradient heat pipe hole 5 close to the high-speed permanent magnet motor 1 is opened, the end is sealed by a plug 11.
In the embodiment, the distance from the end of each gradient heat pipe hole 5, which is far away from the high-speed permanent magnet motor 1, to the central shaft is small; the distance from the end, close to the high-speed permanent magnet motor 1, of each gradient heat pipe hole 5 to 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 holes 5 is 3-15 mm, preferably 7mm; each gradient heat pipe hole 5 is positioned on the same plane with the central shaft of the roller body 4.
In this embodiment, the high-speed rotating gradient heat pipe type heat roller further includes: an overtemperature protector 9; the overtemperature protector 9 is arranged on the connecting seat 301, and a probe of the overtemperature protector 9 is in non-contact with the end face of the roller body 4; the overtemperature protector 9 is suitable for detecting the temperature data of the end face of the roller body 4 and controlling the high-frequency induction coil assembly to be disconnected and alarm according to the temperature data of the end face of the roller body 4.
In this embodiment, the high-speed rotating gradient heat pipe type heat roller further includes: a resolver 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 resolver 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 electrified or not, and the overtemperature protection and alarm of the roller body 4 can be realized through the overtemperature protector 9.
Example 2
On the basis of embodiment 1, this embodiment provides a high-speed rotating gradient heat pipe type hot roller processing method, which includes: fixedly connecting a stainless steel connecting taper sleeve 201 on the roller body 4; the motor shaft 2 is connected with the roller body 4 through a stainless steel connecting taper sleeve 201; the induction heating mechanism 3 is connected with the high-speed permanent magnet motor 1 through a connecting seat 301, and the induction heating mechanism 3 is arranged in an inner hole at one end of the roller body 4; a plurality of gradient heat pipe holes 5 which are annularly distributed around the roller body 4 and are axially arranged along the roller body 4 are formed in the roller body 4, 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, which is far away from the high-speed permanent magnet motor 1, is communicated in the roller body 4, and the gradient heat pipe holes 5 are integrally sealed through a plugging ring 7; high-frequency current is connected through the induction heating mechanism 3 to generate an alternating magnetic field to heat the roller body 4.
In this 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 from the high-speed permanent magnet motor 1, and the guide holes are controlled by the electronic dividing head so that the holes of the low-slope section 501 and the high-slope section 502 are relatively and smoothly connected, and the difference of the positions of the holes is not more than 0.1mm; the angles of all the orifices are consistent, and the deviation is not more than 3%; the gradient heat pipe holes 5 near the end of the high-speed permanent magnet motor 1 are sealed independently, and the pipe orifice far from the end of the high-speed permanent magnet motor 1 is machined to enable the root parts of the gradient heat pipe holes 5 to be communicated so as to seal the whole.
In this embodiment, as an embodiment of the roller body made of aluminum alloy, taking an aluminum alloy roller body 4Φ250×480mm for terylene FDY process as an example, assuming that 35% of the length of the roller body 4 is used as a heating section, namely a low-inclination section 501, a Φ6x460 mm hole is also drilled at an angle of 1 ° with respect to the central line of the roller body 4, the distance between the gradient heat pipe hole 5 and the end of the high-speed permanent magnet motor 1 is 5.2mm greater than the distance between the gradient heat pipe hole 5 and the end of the high-speed permanent magnet motor 1, the roller body 4 adopts a heat pipe heat transfer mode, the heat medium liquid is basically filled in the heating section, no inclined pipe is needed in the heating section or only a low-inclination pipe is needed, once the roller body 4 rotates at a high speed, the liquid medium is concentrated to the heating section of the roller body 4, and because the aluminum alloy roller body 4 is adopted, the heat transfer performance is good, the length of the high-frequency induction heating coil only needs about 1/3 of the original power frequency coil, the induction electromagnetic heating system concentrates the heating liquid medium, the liquid medium is rapidly converted into vaporization vortex, and the heat effect is exerted, and the heat pipe heat is maximum efficiency is exerted; the inner wall of the vacuum heat pipe of the roller body 4 is subjected to purification corrosion prevention treatment, so that electrochemical reaction of a medium and metal is strictly prevented under a high-temperature environment, gas resistance (namely inconsistent vapor pressure and temperature) is generated by generating non-condensable gas, the thermal conversion of the roller surface is influenced, the uniform vapor-liquid equilibrium temperature is caused to be invalid, a temperature sensor 81 is further arranged on the roller body 4 so as to transmit a temperature signal to a temperature control system, and output information is controlled to work of a high-frequency generating source, so that the requirement of temperature stabilization is met; the high-speed rotating gradient heat pipe type heat roller rotates at 1000rpm, the set temperature is 120 ℃, the set temperature is reached only by 4 minutes from room temperature, the roller surface temperature is measured after the temperature is balanced for 4 minutes, the four-point position temperature difference is +/-0.4 ℃ (the actual measurement error), and the roller surface temperature is uniform and is the characteristic of the most basic vapor-liquid balance heat roller for heat pipe type heat transfer; the high-speed rotating gradient heat pipe type hot roller is continuously heated to 180 ℃, and is increased to 5000rpm, so that the temperature compensation function under the condition of high temperature equalization and heat load in the heat pipe effect is further shown, and the temperature deviation of the actually measured roller surface is not more than 1.0 ℃.
In this embodiment, as an embodiment of the steel roller body, taking a steel roller body 4Φ250×480mm for terylene FDY process as an example, assuming that 45% of the length of the roller body 4 is used as a heating section, namely a low-slope section 501, a hole with Φ6x460 mm is also drilled at an angle of 1 ° with the central line of the roller, relative to the central line of the roller body 4, the distance between the gradient heat pipe hole 5 and the end of the high-speed permanent magnet motor 1 is only 4.4mm greater than the distance between the gradient heat pipe hole 5 and the end of the high-speed permanent magnet motor 1, the roller body 4 adopts a heat pipe heat transfer mode, the heat medium liquid of the roller body 4 is basically filled in the heating section, no inclined tube is needed or only a low-slope tube is needed, once the roller body 4 rotates at a high speed, the high-frequency induction heating coil is only needed to be about 45% of the length of the original power frequency coil, and the induction electromagnetic heating system concentrates the heating liquid medium, so that the heat generated by electromagnetic vortex is rapidly converted into vaporization latent heat, and the heat pipe effect is maximally volatilized; the inner wall of the vacuum heat pipe of the roller body 4 is subjected to purification and corrosion prevention treatment, so that electrochemical reaction of a medium and metal is strictly prevented under a high-temperature environment, gas resistance (namely inconsistent vapor pressure and temperature) is generated by generating non-condensable gas, the thermal conversion of the roller surface is influenced, the uniform vapor-liquid equilibrium temperature is caused to be invalid, a temperature sensor 81 is further arranged on the roller body 4, so that a temperature signal is transmitted to a temperature control system, and output information is controlled to work of a high-frequency generating source, so that the requirement of temperature stabilization is met; the high-speed rotating gradient heat pipe type heat roller rotates at 1000rpm, the set temperature is 120 ℃, the set temperature is reached only 5 minutes from room temperature, the roller surface temperature is measured after the roller surface temperature is balanced for 4 minutes, the four-point position temperature difference is +/-0.5 ℃ (actually measuring error), and the roller surface temperature is the most basic characteristic of the heat pipe type heat transfer vapor-liquid balance heat roller; the high-speed rotating gradient heat pipe type hot roller is continuously heated to 180 ℃ and the rotating speed is increased to 5000rpm, so that the temperature compensation function under the condition of high temperature equalization and heat load in the heat pipe effect is further shown, and the temperature deviation of the actually measured roller surface is less than 1.2 DEG C
In this example, the high-speed rotating gradient heat-pipe type heat-roll processing method is suitable for processing a high-speed rotating gradient heat-pipe type heat-roll as provided in example 1.
In this example, a high-speed rotating gradient heat pipe thermo roll was already described in example 1.
In summary, the gradient heat pipe holes are formed in the periphery of the roller body and along the axial direction of the roller body, so that the roller is applicable to roller bodies made of steel materials and aluminum alloy materials, the mass of the whole heat roller can be reduced, the length of the roller body can be properly increased or the stress on the bearing can be reduced, the heat transfer efficiency of the roller body is higher, and better uniformity of the temperature of the roller surface is achieved.
The components (components not illustrating specific structures) selected in the application are all common standard components or components known to those skilled in the art, and the structures and principles of the components are all known to those skilled in the art through technical manuals or through routine experimental methods.
In the description of embodiments of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (8)
1. A high-speed rotating gradient heat pipe type heat roller, 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;
the roller body is fixedly connected with a stainless steel connecting taper sleeve, the motor shaft is connected with the roller body through the stainless steel connecting taper sleeve, the induction heating mechanism is fixed on the connecting seat and is arranged in an inner hole at one end of the roller body, and a plurality of gradient heat pipe holes which are distributed around the roller body in a surrounding manner 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 a low-inclination section and a high-inclination section on the gradient heat pipe hole, namely the high-speed permanent magnet motor drives a motor shaft to rotate so as to drive the roller body to rotate, the temperature control unit controls the induction heating mechanism to heat the heating section on the roller body in an induction way, 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 gradient heat pipe hole adopts at least two stages of gradients, the gradient of the low-gradient section is 0-0.5 degrees, and the gradient of the high-gradient section is more than 1.5 degrees and less than 2.5 degrees;
the induction heating mechanism comprises: 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 inductively heat the roller body.
2. The high-speed rotating gradient heat pipe type heat roller according to claim 1, wherein,
the heat pipes of the low-gradient section and the high-gradient section in the same gradient heat pipe hole have the same inner diameter size and are communicated smoothly.
3. The high-speed rotating gradient heat pipe type heat roller according to claim 1, wherein,
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 the gradient heat pipe holes are sealed with the roller body through the plugging rings.
4. The high-speed rotating gradient heat pipe type heat roller according to claim 1, wherein,
the high-speed rotating gradient heat pipe type heat roller further comprises: an overtemperature protector;
the overtemperature protector is arranged on the connecting seat, and a probe of the overtemperature protector is in non-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 controlling the high-frequency induction coil assembly to be disconnected and alarm according to the temperature data of the end face of the roller body.
5. The high-speed rotating gradient heat pipe type heat roller according to claim 1, wherein,
the high-speed rotating 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.
6. The high-speed rotating gradient heat pipe type hot roller processing method is characterized by comprising the following steps of:
fixedly connecting a stainless steel connecting taper sleeve on the roller body;
a motor shaft is connected with the roller body through a stainless steel connecting taper sleeve;
the induction heating mechanism is connected with the high-speed permanent magnet motor through a connecting seat and is arranged in an inner hole at one end of the roller body;
the method comprises the steps that 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, one end of each gradient heat pipe hole is close to a 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 the gradient heat pipe holes are integrally sealed through blocking rings;
the induction heating mechanism is connected with high-frequency current to generate an alternating magnetic field to heat the roller body; wherein the method comprises the steps of
The gradient heat pipe hole adopts at least two stages of gradients, the gradient of the low-gradient section is 0-0.5 degrees, and the high-gradient section is more than 1.5 degrees and less than 2.5 degrees.
7. The method of claim 6, wherein the low-slope section of the gradient heat pipe hole is drilled from the position close to the high-speed permanent magnet motor end, the high-slope section of the gradient heat pipe hole is drilled from the position far from the high-speed permanent magnet motor end, and the guide hole is controlled by the electronic dividing head so that the orifices of the low-slope section and the high-slope section are opposite and connected smoothly; the gradient heat pipe holes near the end of the high-speed permanent magnet motor are sealed independently, and the pipe orifice far away from the end of the high-speed permanent magnet motor is communicated with the root of each gradient heat pipe hole through machining, so that the whole sealing is performed.
8. The high-speed rotating gradient heat pipe type heat roll processing method according to claim 7, wherein the high-speed rotating gradient heat pipe type heat roll processing method is adapted to process the high-speed rotating gradient heat pipe type heat roll according to any one of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010686156.5A CN111733468B (en) | 2020-07-16 | 2020-07-16 | High-speed rotating gradient heat pipe type hot roller and processing method thereof |
| PCT/CN2020/103331 WO2022011733A1 (en) | 2020-07-16 | 2020-07-21 | High-speed-rotating, graded heat pipe-type hot roller and processing method therefor |
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| CN202010686156.5A CN111733468B (en) | 2020-07-16 | 2020-07-16 | High-speed rotating gradient heat pipe type hot roller and processing method thereof |
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| CN111733468B true CN111733468B (en) | 2024-02-09 |
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| CN113638065B (en) * | 2021-09-02 | 2022-10-14 | 江苏中杰澳新材料有限公司 | Heat pipe assembly, special-shaped inclined pipe type hot roller comprising heat pipe assembly and machining method of special-shaped inclined pipe type hot roller |
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Also Published As
| Publication number | Publication date |
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| WO2022011733A1 (en) | 2022-01-20 |
| CN111733468A (en) | 2020-10-02 |
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