CN110765580A - Manufacturing and calibrating method of hard disk heat dissipation model calibrating device - Google Patents
Manufacturing and calibrating method of hard disk heat dissipation model calibrating device Download PDFInfo
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Abstract
The invention discloses a manufacturing method of a hard disk heat dissipation model calibration device, which comprises the steps of removing an upper cover of a hard disk to be calibrated, and measuring the size of a hard disk storage disc; dismantling the storage disc and the magnetic head, and removing the coating around the motor stator; heat-resisting resistors are distributed around the motor stator and connected in series; measuring the total resistance value of the heat-resistant resistor; and (4) extending the leads at the two ends of the serially connected heat-resistant resistor out of the hard disk body, and assembling the upper cover of the hard disk. The invention also provides a hard disk heat dissipation model calibration method, which is characterized in that the average thermal resistance of the calibration device is measured and calculated by using the hard disk heat dissipation model calibration device, and the heat conduction parameter K of the hard disk is calibrated. The invention realizes the accurate setting of all parameters of the hard disk, can obtain a calibrated hard disk heat dissipation simulation model, has extremely high accuracy, can replace a real hard disk to carry out heat tests under different working conditions, reduces the material consumption caused by the use of the hard disk in a real system, and provides solid data support for the heat dissipation design of the system.
Description
Technical Field
The invention relates to the field of server heat dissipation simulation, in particular to a manufacturing and calibrating method of a hard disk heat dissipation model calibrating device.
Background
In the heat dissipation simulation work of the server, the hard disk is an important part for establishing a heat dissipation simulation model, the model is generally obtained according to the size and the material of the hard disk, and the attributes of all elements, such as density, heat conductivity, power consumption and the like, need to be input.
When analog simulation is performed, simulation parameters are usually set according to inherent properties of materials. The heat dissipation simulation method for the hard disk comprises the steps of obtaining the whole external dimension of the hard disk from a hard disk manufacturer, then establishing the whole hard disk into a simple block, and attaching the heat conductivity obtained from the manufacturer to the block.
However, in actual production, due to the influence of factors such as material composition, process parameters, preparation method, impurities, etc., even if the same material is used, the intrinsic properties of materials of different manufacturers and different batches are different, so that the simulation parameters are set according to the intrinsic properties of the materials, and the simulation may have a certain deviation. Meanwhile, different differences exist in the power consumption of the hard disk in the actual use condition, so that the parameter setting of the power consumption in the simulation model also influences the simulation accuracy.
Disclosure of Invention
In order to solve the technical problems, the invention provides a manufacturing and calibration method of a hard disk heat dissipation model calibration device, which realizes the accurate setting of parameters of each part of a hard disk.
In order to achieve the purpose, the invention adopts the following technical scheme:
a manufacturing method of a hard disk heat dissipation model calibration device is characterized in that,
removing the upper cover of the hard disk to be calibrated, and measuring the size of the hard disk storage disc;
dismantling the storage disc and the magnetic head, and removing the coating around the motor stator;
heat-resisting resistors are distributed around the motor stator and connected in series;
measuring the total resistance value of the heat-resistant resistor;
and (4) extending the leads at the two ends of the serially connected heat-resistant resistor out of the hard disk body, and assembling the upper cover of the hard disk.
Further, the storage disc size was measured by a vernier caliper.
Furthermore, the lead penetrates out of a connecting hole between the hard disk body and the hard disk PCB.
Furthermore, the heat-resistant resistor is connected with the hard disk in a compaction mode through heat-conducting glue.
The invention also provides a hard disk heat dissipation model calibration method, and the hard disk heat dissipation model calibration device manufactured by the method, which is characterized in that,
measuring and calculating the average thermal resistance of the calibration device: testing the heat dissipation model calibration device of the hard disk in the wind tunnel laboratory, recording the temperature T of the test environmentaMeasuring the temperature of the calibration device under different wind speeds and different power consumptions, and calculating the average thermal resistance of the calibration device under different wind speeds according to the temperature;
calibrating a hard disk heat conduction parameter K: establishing a hard disk 3D heat dissipation simulation model and a numerical wind tunnel in CFD software; calculating initial heat conduction parameters of the hard disk material at a certain wind speed according to the average thermal resistance of the calibration device at the certain wind speed, and obtaining the simulated temperature and the simulated thermal resistance of the hard disk under the condition through simulation calculation; adjusting the initial heat conduction parameter of the hard disk material until the error between the simulated temperature of the hard disk and the measured temperature of the calibration device and the error between the simulated thermal resistance and the calculated average thermal resistance are within a preset range, and determining the reference heat conduction coefficient under the wind speed; and calculating the average value of the hard disk material reference heat conduction parameters at each wind speed, namely the calibrated hard disk heat conduction parameter K.
Furthermore, the size range of a hard disk rotor of the hard disk 3D heat dissipation simulation model is set as a power consumption area of a hard disk, the power consumption is set as the real hard disk power consumption, the length, width and height of the numerical wind tunnel are more than 5 times of the corresponding size of the hard disk, and the ambient temperature of the boundary condition of the numerical wind tunnel is set as Ta。
Further, the specific steps of measuring and calculating the average thermal resistance of the calibration device are as follows:
11) measuring test environment temperature Ta；
12) Setting the wind speed of the fan, and setting the power consumption of the measurement and calibration device to be P1、P2、……、PjTime, temperature T of the calibrating devicecAnd calculating the thermal resistance value of the calibration device according to the following calculation formula:
averaging the thermal resistance values under different power consumptions to obtain the average thermal resistance of the calibration device under the wind speed;
13) modify fan speed according to measurement requirements, repeat 12).
Further, the specific steps of calibrating the hard disk heat conduction parameter K are as follows:
21) setting parameters of a hard disk 3D heat dissipation simulation model and a numerical wind tunnel;
22) calculating initial heat conduction parameters of the hard disk material at a certain wind speed according to the obtained average thermal resistance of the calibration device at the certain wind speed, and obtaining the simulated temperature and the simulated thermal resistance of the hard disk under the condition through automatic simulation calculation;
23) calculating the difference value between the simulated temperature of the hard disk and the measured temperature of the calibration device, and entering 24 if the difference value is less than or equal to 2 ℃; if the difference is greater than 2 degrees, adjusting the initial heat conduction parameter, and repeating 23);
24) calculating the difference value between the simulated thermal resistance and the average thermal resistance of the calibration device, and if the difference value between the average thermal resistance of the calibration device and the simulated thermal resistance is within 10%, determining the current thermal conductivity parameter as the reference thermal conductivity parameter of the hard disk material at the wind speed; if the difference between the average thermal resistance of the calibrating device and the simulated thermal resistance is larger than 10%, adjusting the size of the heat conduction parameter, and repeating 23);
25) modifying the fan speed according to the measurement requirement, and repeating 22);
26) and calculating the average value of the hard disk material reference heat conduction parameters at each wind speed, namely the calibrated hard disk heat conduction parameter K.
Furthermore, before the average thermal resistance of the calibration device is measured and calculated, the measurement results of the calibration device and the real hard disk are compared, and the accuracy of the calibration device is verified.
Further, the comparison method specifically comprises the following steps:
measuring the normal work power consumption, temperature and fan rotating speed of a real hard disk in a server by using the rotating speed of a fixed fan;
setting a calibration device at a slot position of a real hard disk in the server, supplying power to the calibration device by adopting an external power supply, wherein the power consumption is the power consumption of the original real hard disk, and measuring the temperature of the calibration device at the same fan rotating speed;
and verifying whether the temperature difference between the real hard disk and the calibration device is within the engineering error range.
The invention has the beneficial effects that:
according to the manufacturing and calibrating method of the hard disk heat dissipation model calibrating device, a calibrated hard disk heat dissipation simulation model can be obtained, the temperature distribution of the hard disk under different conditions and different configurations can be obtained through simulation of the simulation model, and solid data support can be provided for system heat dissipation design. Because the model parameters are calibrated by the calibration device, the accuracy is extremely high, the system heat dissipation test time can be greatly reduced, the heating test under different working conditions can be performed instead of a real hard disk, and the material consumption caused by the use of the hard disk in a real system is reduced; the mechanical hard disk heat dissipation simulation verification and calibration device can also predict the system to the greatest extent by adjusting the power consumption, and provide sufficient data accumulation for subsequent system design.
Drawings
FIG. 1 is a schematic structural diagram of a hard disk heat dissipation model calibration device manufactured by the present invention;
FIG. 2 is a schematic diagram of a numerical wind tunnel established in accordance with an embodiment of the present invention;
fig. 3 is a schematic diagram of setting CFD software parameters according to an embodiment of the present invention.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention.
The invention provides a manufacturing method of a hard disk heat dissipation model calibration device, which comprises the steps of firstly, selecting a certain type of hard disk to be calibrated to disassemble, detaching an upper cover screw to detach the upper cover, and measuring and recording the size of a storage disk in the hard disk by using a vernier caliper; then, the storage disc and the magnetic head in the hard disk are removed;
secondly, removing the material coating around the motor stator by mechanical means;
then, appropriate heat-resistant resistances are uniformly arranged around the motor stator; the number of the heat-resistant resistors is determined according to the type of the selected resistor, and the sum of the maximum power consumption of all the resistors is designed to be 25W;
all resistors are connected together in series through conducting wires, and the resistors and the bottom surface of the hard disk body are connected through heat conducting glue, and are required to be compacted to be fully contacted during connection;
then, measuring the total resistance between the series resistors and recording the total resistance in a book;
finally, two ends of the resistor penetrate out of a connecting hole between the hard disk body and the hard disk PCB by using two wires; and (4) assembling the upper cover of the hard disk by using the original screw to finish the manufacture of the hard disk heat dissipation model calibration device.
The schematic structural diagram of the hard disk heat dissipation model calibration device manufactured by the manufacturing method is shown in fig. 1. Wherein 1 is hard disk body ground, 2 is the motor stator, 3 is heat-resisting resistance, 4 is the wire, 5 is the connecting hole between hard disk body and the hard disk PCB.
The invention also provides a calibration method of the hard disk heat dissipation model by utilizing the manufactured hard disk heat dissipation model calibration device, which comprises the following steps:
measuring and calculating the average thermal resistance of the calibration device: testing the heat dissipation model calibration device of the hard disk in the wind tunnel laboratory, recording the temperature T of the test environmentaMeasuring the temperature of the calibration device under different wind speeds and different power consumptions, and calculating the average thermal resistance of the calibration device under different wind speeds according to the temperature;
calibrating a hard disk heat conduction parameter K: establishing a hard disk 3D heat dissipation simulation model and a numerical wind tunnel in CFD software; calculating initial heat conduction parameters of the hard disk material at a certain wind speed according to the average thermal resistance of the calibration device at the certain wind speed, and obtaining the simulated temperature and the simulated thermal resistance of the hard disk under the condition through simulation calculation; adjusting the initial heat conduction parameter of the hard disk material until the error between the simulated temperature of the hard disk and the measured temperature of the calibration device and the error between the simulated thermal resistance and the calculated average thermal resistance are within a preset range, and determining the reference heat conduction coefficient under the wind speed; and calculating the average value of the hard disk material reference heat conduction parameters at each wind speed, namely the calibrated hard disk heat conduction parameter K.
The calibration method of the present invention is specifically described below by taking an embodiment as an example:
firstly, testing a hard disk heat dissipation model calibration device in a wind tunnel laboratory as follows, recording the temperature of the hard disk calibration device, and calculating the average thermal resistance of the calibration device:
11) respectively measuring the temperature T of the hard disk heat dissipation calibrating device when the power consumption of the hard disk heat dissipation model calibrating device is 5W, 8W, 11W, 14W and 17W under the wind speed of 0.5m/scThe thermal resistance value at each power consumption is calculated using the following formula:
wherein, TaFor the ambient temperature at the time of the test, PjCalibrating device power consumption for a hard disk;
calculating an average value according to the thermal resistance values, and calculating to obtain an average thermal resistance value A1;
12) respectively measuring the temperature T of the hard disk heat dissipation calibrating device when the power consumption of the hard disk heat dissipation model calibrating device is 5W, 8W, 11W, 14W and 17W under the wind speed of 1m/scThe thermal resistance value at each power consumption is calculated using the following formula:
wherein, TaFor the ambient temperature at the time of the test, PjCalibrating device power consumption for a hard disk;
calculating an average value according to the thermal resistance values, and calculating to obtain an average thermal resistance value A2;
13) when the wind speed is 1.5m/s and the power consumption of the hard disk heat dissipation model calibration device is 5W, 8W, 11W, 14W and 17W,respectively measuring temperature T of hard disk heat dissipation calibration devicecThe thermal resistance value at each power consumption is calculated using the following formula:
wherein, TaFor the ambient temperature at the time of the test, PjCalibrating device power consumption for a hard disk;
calculating an average value according to the thermal resistance values, and calculating to obtain an average thermal resistance value A3;
14) respectively measuring the temperature T of the hard disk heat dissipation calibrating device when the power consumption of the hard disk heat dissipation model calibrating device is 5W, 8W, 11W, 14W and 17W under the wind speed of 2m/scThe thermal resistance value at each power consumption is calculated using the following formula:
wherein, TaFor the ambient temperature at the time of the test, PjCalibrating device power consumption for a hard disk;
calculating an average value according to the thermal resistance values, and calculating to obtain an average thermal resistance value A4;
15) respectively measuring the temperature T of the hard disk heat dissipation calibrating device when the power consumption of the hard disk heat dissipation model calibrating device is 5W, 8W, 11W, 14W and 17W under the wind speed of 2.5m/scThe thermal resistance value at each power consumption is calculated using the following formula:
wherein, TaFor the ambient temperature at the time of the test, PjCalibrating device power consumption for a hard disk;
the calculation averages these thermal resistance values and calculates an average thermal resistance value a 5.
Secondly, establishing a heat dissipation simulation model according to a hard disk 3D model in CFD software (such as Flotherm), setting a power consumption area of a hard disk in the size range of a hard disk rotor, setting the power consumption of the hard disk as the real hard disk test power consumption 17W, and establishing a numerical wind tunnel(as shown in FIG. 2), the boundary condition ambient temperature of the numerical wind tunnel is set as the temperature T when the hard disk calibration device is testedaThe length, width and height of the numerical wind tunnel exceed 5 times of the corresponding size of the real hard disk and are appropriately divided into grids, and 6 is set as a wind speed air inlet surface in fig. 2. The calibration steps are as follows:
21) under the set wind speed of 0.5m/s, the initial heat conduction parameter K1 of the hard disk material is obtained through inverse calculation according to the average thermal resistance A1 of the hard disk calibration device, the K1 value is directly input through the material parameters of CFD software (as shown in figure 3), and then the simulation calculation is automatically carried out through the CFD software to obtain the simulation temperature T of the hard disk under the conditionc' and calculating the simulated thermal resistance Y1 of the simulation model by a thermal resistance calculation formula. Through Tc' T with hard disk device 17WcComparison (if Tc' greater than TcThe adjustment of K1 value becomes smaller, and conversely, the adjustment of K1 value becomes larger) to continuously correct the K1 value and finally obtain Tc' and TcThe difference is within 2 degrees, at this time, if the difference between A1 and Y1 is within 10%, the judgment is normal, the value of K1 at this time is recorded as the value of the reference thermal conductivity parameter K11, otherwise, the value of K1 needs to be continuously adjusted to reduce the difference between Tc' and Tc until the difference between A1 and Y1 is within 10%;
22) under the set wind speed of 1m/s, the initial heat conduction parameter K2 of the hard disk material is obtained through inverse calculation according to the average thermal resistance A2 of the hard disk calibration device, and then the simulation temperature T of the hard disk under the condition is obtained through automatic simulation calculation of CFD softwarec' and calculating the simulated thermal resistance Y2 of the simulation model by a thermal resistance calculation formula. Through Tc' T with hard disk device 17WcComparison (if Tc' greater than TcThe adjustment of K1 value becomes smaller, and conversely, the adjustment of K2 value becomes larger) to continuously correct the K2 value and finally obtain Tc' and TcThe difference is within 2 degrees, at this time, if the difference between A2 and Y2 is within 10%, the judgment is normal, the value of K2 at this time is recorded as the value of the reference thermal conductivity parameter K22, otherwise, the value of K2 needs to be continuously adjusted to reduce the difference between Tc' and Tc until the difference between A2 and Y2 is within 10%;
23) under the set wind speed of 1.5m/s, the material of the hard disk is obtained by inverse calculation according to the average thermal resistance A3 of the hard disk calibration deviceInitial heat conduction parameter K3, and then through CFD software automatic simulation calculation, obtain hard disk simulation temperature T under this conditionc' and calculating the simulated thermal resistance Y3 of the simulation model by a thermal resistance calculation formula. Through Tc' T with hard disk device 17WcComparison (if Tc' greater than TcThe adjustment of K3 value becomes smaller, and conversely, the adjustment of K3 value becomes larger) to continuously correct the K3 value and finally obtain Tc' and TcThe difference is within 2 degrees, at this time, if the difference between A3 and Y3 is within 10%, the judgment is normal, the value of K3 at this time is recorded as the value of the reference thermal conductivity parameter K33, otherwise, the value of K3 needs to be continuously adjusted to reduce the difference between Tc' and Tc until the difference between A3 and Y3 is within 10%;
24) under the set wind speed of 2m/s, the initial heat conduction parameter K4 of the hard disk material is obtained through inverse calculation according to the average thermal resistance A4 of the hard disk calibration device, and then the simulation temperature T of the hard disk under the condition is obtained through automatic simulation calculation of CFD softwarec' and calculating the simulated thermal resistance Y4 of the simulation model by a thermal resistance calculation formula. Through Tc' T with hard disk device 17WcComparison (if Tc' greater than TcThe adjustment of K4 value becomes smaller, and conversely, the adjustment of K4 value becomes larger) to continuously correct the K4 value and finally obtain Tc' and TcThe difference is within 2 degrees, at this time, if the difference between A4 and Y4 is within 10%, the judgment is normal, the value of K4 at this time is recorded as the value of the reference thermal conductivity parameter K44, otherwise, the value of K4 needs to be continuously adjusted to reduce the difference between Tc' and Tc until the difference between A4 and Y4 is within 10%;
25) under the set wind speed of 2.5m/s, the initial heat conduction parameter K5 of the hard disk material is obtained through inverse calculation according to the average thermal resistance A5 of the hard disk calibration device, and then the simulation temperature T of the hard disk under the condition is obtained through automatic simulation calculation of CFD softwarec' and calculating the simulated thermal resistance Y5 of the simulation model by a thermal resistance calculation formula. Through Tc' T with hard disk device 17WcComparison (if Tc' greater than TcThe adjustment of K5 value becomes smaller, and conversely, the adjustment of K5 value becomes larger) to continuously correct the K5 value and finally obtain Tc' and TcThe difference is within 2 degrees, when the difference between A5 and Y5 is 10%Judging the temperature within the range to be normal, recording the K5 value at the moment as a reference heat conduction parameter K55 value, otherwise, continuously adjusting the K5 value to reduce the difference between Tc' and Tc until the difference between A5 and Y5 is within 10 percent;
26) averaging K11, K22, K33, K44 and K55 to obtain a heat conduction parameter K of the hard disk, and finally storing the K value as a material heat conduction parameter of the hard disk heat dissipation simulation model; the difference between the final heat dissipation simulation model obtained by the method and the actual temperature of the hard disk is always kept within 2 degrees, the accuracy is greatly improved, and the requirements of engineering heat dissipation simulation are completely met.
The heat dissipation simulation model can simulate future high-power and high-power consumption mechanical hard disks by adjusting the power consumption of the hard disks, and provides solid foundation support for heat dissipation design.
In order to ensure that the difference between the hard disk heat dissipation model calibration device and the real hard disk is small enough, before the average thermal resistance of the calibration device is measured and calculated, the hard disk heat dissipation film calibration device and the real hard disk can be measured and compared, and the specific process is as follows:
firstly, connecting a thermocouple wire with a hard disk and a hard disk heat dissipation calibration device according to a specification of the hard disk;
secondly, measuring data such as power consumption, temperature, fan rotating speed and the like of normal operation of the real hard disk by using the rotating speed of the fixed fan in the server;
thirdly, placing a hard disk heat dissipation calibration device in a hard disk slot position of the original real hard disk in the test server, wherein the hard disk heat dissipation calibration device adopts an external power supply (DC source) for power supply, the power supply power consumption is the original real hard disk power consumption, and testing and recording the temperature of the hard disk calibration device at the same fan rotating speed;
and forming a data comparison table M for the temperature difference of the real hard disk and the hard disk heat dissipation calibration device, and verifying whether the temperature difference of the real hard disk and the calibration device is within the engineering error range.
Because of the heat dissipation characteristic of the hard disk, the power consumption is mainly generated by the position of the rotor, and the heat source of the hard disk calibration device is also intensively and uniformly distributed at the position of the rotor, so that the temperature difference between the real hard disk and the hard disk calibration device is extremely small under the same power consumption, and is within the engineering error range. If the difference between the hard disk heat dissipation calibration device and the hard disk temperature exceeds 2 degrees under the condition that the rotating speed of the fan is the same on the surface and the inner surface of the M and the power consumption of the hard disk, whether the internal resistance of the hard disk heat dissipation calibration device is damaged or not, whether the heat-conducting glue is damaged or not and whether the heat-conducting glue is firmly bonded or not need to be checked.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, the scope of the present invention is not limited thereto. Various modifications and alterations will occur to those skilled in the art based on the foregoing description. And are neither required nor exhaustive of all embodiments. On the basis of the technical scheme of the invention, various modifications or changes which can be made by a person skilled in the art without creative efforts are still within the protection scope of the invention.
Claims (10)
1. A manufacturing method of a hard disk heat dissipation model calibration device is characterized in that,
removing the upper cover of the hard disk to be calibrated, and measuring the size of the hard disk storage disc;
dismantling the storage disc and the magnetic head, and removing the coating around the motor stator;
heat-resisting resistors are distributed around the motor stator and connected in series;
measuring the total resistance value of the heat-resistant resistor;
and (4) extending the leads at the two ends of the serially connected heat-resistant resistor out of the hard disk body, and assembling the upper cover of the hard disk.
2. The manufacturing method of the hard disk heat dissipation model calibration device as claimed in claim 1, wherein the dimensions of the storage disk are measured by a vernier caliper.
3. The manufacturing method of the hard disk heat dissipation model calibration device as claimed in claim 1, wherein the wire penetrates out from a connection hole between the hard disk body and the hard disk PCB.
4. The manufacturing method of the hard disk heat dissipation model calibration device as claimed in claim 1, wherein the heat-resistant resistor is connected with the hard disk by compacting with a heat-conducting adhesive.
5. A method for calibrating a heat dissipation model of a hard disk, which is manufactured by the method of any one of claims 1 to 4,
measuring and calculating the average thermal resistance of the calibration device: testing the heat dissipation model calibration device of the hard disk in the wind tunnel laboratory, recording the temperature T of the test environmentaMeasuring the temperature of the calibration device under different wind speeds and different power consumptions, and calculating the average thermal resistance of the calibration device under different wind speeds according to the temperature;
calibrating a hard disk heat conduction parameter K: establishing a hard disk 3D heat dissipation simulation model and a numerical wind tunnel in CFD software; calculating initial heat conduction parameters of the hard disk material at a certain wind speed according to the average thermal resistance of the calibration device at the certain wind speed, and obtaining the simulated temperature and the simulated thermal resistance of the hard disk under the condition through simulation calculation; adjusting the initial heat conduction parameter of the hard disk material until the error between the simulated temperature of the hard disk and the measured temperature of the calibration device and the error between the simulated thermal resistance and the calculated average thermal resistance are within a preset range, and determining the reference heat conduction coefficient under the wind speed; and calculating the average value of the hard disk material reference heat conduction parameters at each wind speed, namely the calibrated hard disk heat conduction parameter K.
6. The hard disk heat dissipation model calibration method according to claim 5, wherein the size range of a hard disk rotor of the hard disk 3D heat dissipation simulation model is set as a power consumption area of a hard disk, the power consumption is set as the real hard disk power consumption, the length, width and height of the numerical wind tunnel are more than 5 times of the corresponding size of the hard disk, and the boundary condition ambient temperature of the numerical wind tunnel is set as Ta。
7. The hard disk heat dissipation model calibration method as claimed in claim 5, wherein the specific steps of measuring and calculating the average thermal resistance of the calibration device are as follows:
11) measuring test environment temperature Ta；
12) Setting the wind speed of the fan, and setting the power consumption of the measurement and calibration device to be P1、P2、……、PjTime, temperature T of the calibrating devicecAnd calculating the thermal resistance value of the calibration device according to the following calculation formula:
averaging the thermal resistance values under different power consumptions to obtain the average thermal resistance of the calibration device under the wind speed;
13) modify fan speed according to measurement requirements, repeat 12).
8. The hard disk heat dissipation model calibration method according to claim 7, wherein the specific steps of calibrating the hard disk heat conduction parameter K are as follows:
21) setting parameters of a hard disk 3D heat dissipation simulation model and a numerical wind tunnel;
22) calculating initial heat conduction parameters of the hard disk material at a certain wind speed according to the obtained average thermal resistance of the calibration device at the certain wind speed, and obtaining the simulated temperature and the simulated thermal resistance of the hard disk under the condition through automatic simulation calculation;
23) calculating the difference value between the simulated temperature of the hard disk and the measured temperature of the calibration device, and entering 24 if the difference value is less than or equal to 2 ℃; if the difference is greater than 2 degrees, adjusting the initial heat conduction parameter, and repeating 23);
24) calculating the difference value between the simulated thermal resistance and the average thermal resistance of the calibration device, and if the difference value between the average thermal resistance of the calibration device and the simulated thermal resistance is within 10%, determining the current thermal conductivity parameter as the reference thermal conductivity parameter of the hard disk material at the wind speed; if the difference between the average thermal resistance of the calibrating device and the simulated thermal resistance is larger than 10%, adjusting the size of the heat conduction parameter, and repeating 23);
25) modifying the fan speed according to the measurement requirement, and repeating 22);
26) and calculating the average value of the hard disk material reference heat conduction parameters at each wind speed, namely the calibrated hard disk heat conduction parameter K.
9. The method for calibrating a heat dissipation model of a hard disk as claimed in claim 5, wherein before measuring and calculating the average thermal resistance of the calibration device, the calibration device is compared with the measurement results of the real hard disk to verify the accuracy of the calibration device.
10. The hard disk heat dissipation model calibration method according to claim 9, wherein the comparison method specifically comprises:
measuring the normal work power consumption, temperature and fan rotating speed of a real hard disk in a server by using the rotating speed of a fixed fan;
setting a calibration device at a slot position of a real hard disk in the server, supplying power to the calibration device by adopting an external power supply, wherein the power consumption is the power consumption of the original real hard disk, and measuring the temperature of the calibration device at the same fan rotating speed;
and verifying whether the temperature difference between the real hard disk and the calibration device is within the engineering error range.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113127293A (en) * | 2021-03-26 | 2021-07-16 | 山东英信计算机技术有限公司 | Thermal analysis method and system of electronic equipment and related device |
| CN113127293B (en) * | 2021-03-26 | 2023-02-28 | 山东英信计算机技术有限公司 | Thermal analysis method and system of electronic equipment and related device |
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