Hydraulic oil radiator heat exchange performance detection device and radiator provided with same

Abstract

The present application relates to heat exchange performance detection technical field, specifically relates to a kind of hydraulic oil radiator heat exchange performance detection device and be equipped with the radiator of this device.This detection device contains air intake parameter distribution detection module, air outlet parameter distribution detection module, hydraulic oil import parameter detection module, hydraulic oil export parameter detection module, radiator surface temperature distribution detection module, intelligent detection module, this detection device can be integrated on radiator.The present application can obtain the real-time flow, heat transfer parameter and real-time heat exchange performance of radiator, and can obtain the space distribution and time distribution of parameter, these parameters can provide data support for operation monitoring, fault diagnosis, optimization operation and optimization design;By setting sensor on rotatable detection support, the measurement range of single sensor can be expanded, and accurate measurement, rapid fault judgment can be realized with less sensor, and a small amount of sensor failure does not affect detection effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange performance detection, and particularly relates to a hydraulic oil radiator heat exchange performance detection device and a radiator provided with the device. BACKGROUND

[0002] The hydraulic oil radiator is a cooling device of a hydraulic system and is widely applied to engineering machinery such as excavators, concrete delivery pumps and pavers. The commonly used hydraulic oil radiator realizes heat exchange between forced cold air and hydraulic oil in a heat exchanger to control the temperature of the hydraulic oil, so the radiator is a heat exchanger. The heat exchange performance of the radiator needs to be detected during manufacturing and operation to determine the use parameters or analyze the fault causes.

[0003] The existing hydraulic oil radiator heat exchange performance detection is mainly performed by building a simulation detection platform. The hydraulic oil radiator that is not installed or has been disassembled needs to be installed on the detection platform for detection. The whole detection process needs complicated disassembly, installation and debugging work. The simulation detection platform is difficult to simulate the real working environment, resulting in inaccurate measurement results or difficulty in guiding the actual operation. It is also difficult to obtain the real-time heat exchange performance during operation and the heat exchange performance change data over time. In order to measure sufficient and accurate parameters, the heat exchange performance detection device needs to be integrated into the radiator. A large number of sensors need to be arranged, the sensors are prone to failure in actual operation, and it is difficult to find and replace the sensors in time. Backup sensors or additional detection means for failure are also needed, and the cost is increased.

[0004] Therefore, a hydraulic oil radiator heat exchange performance detection device that can realize accurate online measurement and facilitate fault diagnosis with a small number of sensors needs to be designed, and a radiator integrated with the detection device needs to be designed to solve the above problems. SUMMARY

[0005] The present application relates to the technical field of heat exchange performance detection, and particularly relates to a hydraulic oil radiator heat exchange performance detection device and a radiator provided with the device.

[0006] In order to solve the above technical problems, the present application provides a kind of hydraulic oil radiator heat transfer performance detection device, for containing the heat transfer performance detection of hydraulic oil radiator of air-cooled radiator and cooling fan, including air intake parameter distribution detection module, is set to the air intake side of air-cooled radiator;The air intake parameter distribution detection module includes air intake detection support, the air intake detection support is equipped with several arrayed air intake temperature sensors, several arrayed air intake speed sensors;The air intake detection support can rotate around the central axis of the cooling fan;Further including air outlet parameter distribution detection module, is set to the air outlet side of air-cooled radiator;The air outlet parameter distribution detection module includes air outlet detection support, the air outlet detection support is equipped with several arrayed air outlet temperature sensors, several arrayed air outlet speed sensors, ambient pressure sensor;The air outlet detection support can rotate around the central axis of the cooling fan;Further including hydraulic oil import parameter detection module, is set to hydraulic oil import;The hydraulic oil import parameter detection module includes hydraulic oil import temperature sensor, hydraulic oil import flow sensor;Further including hydraulic oil export parameter detection module, is set to hydraulic oil export;The hydraulic oil export parameter detection module includes hydraulic oil export temperature sensor, hydraulic oil export flow sensor;Further including radiator surface temperature distribution detection module, includes several arrayed surface temperature sensors;Further including intelligent detection module, including receiving unit, storage unit, processing unit;The receiving unit is electrically connected with the air intake parameter distribution detection module, the air outlet parameter distribution detection module, the hydraulic oil import parameter detection module, the hydraulic oil export parameter detection module, the radiator surface temperature distribution detection module, for obtaining the real-time parameter detected by each sensor, the real-time parameter includes air intake temperature, air intake speed, air outlet temperature, air outlet speed, ambient pressure, hydraulic oil import temperature, hydraulic oil import flow, hydraulic oil export temperature, hydraulic oil export flow, and is sent to the storage unit and the processing unit;The storage unit is used to store the real-time parameter combination of the same time input by the receiving unit, and has pre-stored hydraulic oil radiator size information, the installation position information of each detection module, heat transfer coefficient calculation formula;The processing unit is used to control the rotation angle of the air intake detection support and the air outlet detection support around the geometric center axis of the air duct of the air-cooled radiator, and determines the real-time detection position of each detection module according to the rotation angle and the installation position information of each detection module;For determining air intake temperature distribution according to the real-time detection position and real-time parameter of the arrayed air intake temperature sensor;Determine the air intake speed distribution according to the real-time detection position and real-time parameter of the arrayed air intake speed sensor;Determine the air outlet temperature distribution according to the real-time detection position and real-time parameter of the arrayed air outlet temperature sensor;Determine the air outlet speed distribution according to the real-time detection position and real-time parameter of the arrayed air outlet speed sensor;According to the real-time detection position and real-time parameter of the surface temperature sensor arranged in an array, the surface temperature distribution of the air-cooled radiator is determined; according to the inlet air temperature distribution, the inlet air speed distribution, the ambient pressure and the hydraulic oil radiator size information, the average inlet air temperature and the inlet air flow are determined; according to the outlet air temperature distribution, the outlet air speed distribution, the ambient pressure and the hydraulic oil radiator size information, the average outlet air temperature and the outlet air flow are determined; according to the hydraulic oil inlet temperature, the hydraulic oil inlet flow, the hydraulic oil outlet temperature and the hydraulic oil outlet flow, the heat dissipation amount is determined; according to the average inlet air temperature, the inlet air flow, the average outlet air temperature, the outlet air flow, the hydraulic oil inlet temperature, the hydraulic oil inlet flow, the hydraulic oil outlet temperature, the hydraulic oil outlet flow and the pre-stored heat transfer coefficient calculation formula, the heat transfer coefficient is determined; according to the heat transfer coefficient at different time, the fouling thermal resistance coefficient is determined; all the data determined by the processing unit is stored in the storage unit.

[0007] Further, the inlet air detection support and the outlet air detection support are hollow structures, and the measuring points of the inlet air temperature sensor, the inlet air speed sensor, the outlet air temperature sensor, the outlet air speed sensor and the ambient pressure sensor are all installed at the geometric centers of the hollow parts of the hollow structures.

[0008] Further, the inlet air detection support and the outlet air detection support are connected to the fan main shaft of the cooling fan through a controllable connection assembly; when the controllable connection assembly is in the connected state, the fan main shaft drives the inlet air detection support and the outlet air detection support to rotate; when the controllable connection assembly is in the disconnected state, the fan main shaft cannot drive the inlet air detection support and the outlet air detection support to rotate.

[0009] Further, the controllable connection assembly comprises a variable speed gearbox and a clutch.

[0010] Further, the surface temperature sensor is a contact temperature sensor, and the array is arranged on the surface of the air-cooled radiator.

[0011] Another preferred scheme is that the surface temperature sensor is a thermal imager, and the radiator surface temperature distribution detection module comprises at least two thermal imagers, which are respectively used to obtain the surface temperature distribution of the inlet air side and the outlet air side of the air-cooled radiator.

[0012] Further, the surface temperature sensor is arranged on the inlet air detection support and / or the outlet air detection support.

[0013] Further, the storage unit further pre-stores a standard parameter distribution and an upper limit of parameter deviation; the standard parameter distribution comprises a parameter distribution of a standard sample under standard working condition parameters, the standard sample refers to a same model of the hydraulic oil radiator after correct installation, and the working condition parameters comprise an average inlet air temperature, an inlet air flow, an environment pressure, a hydraulic oil inlet temperature and a hydraulic oil inlet flow; the standard working condition parameters are a plurality of groups of preset working condition parameters; the processing unit is further used for determining a standard fitting parameter combination under a specific working condition parameter through fitting of a plurality of groups of standard parameter distributions; and the parameter deviation distribution is determined through comparison of the real-time parameter combination and the standard fitting parameter combination under the same working condition parameter.

[0014] Further, the intelligent detection module further comprises a display unit; the display unit is used for displaying a real-time inlet air temperature distribution, a real-time inlet air speed distribution, a real-time outlet air speed distribution, a real-time radiator surface temperature distribution, and can also be used for displaying a standard fitting parameter distribution and a parameter deviation distribution under a specific working condition parameter.

[0015] The application further provides a radiator provided with the hydraulic oil radiator heat exchange performance detection device.

[0016] The application has the following beneficial effects: the hydraulic oil radiator heat exchange performance detection device is integrated on the radiator, real-time parameters and real-time heat exchange performance can be obtained, the sensor group arranged in an array can improve the measurement accuracy and obtain the spatial distribution of the parameters, the parameter distribution at different times can be collected to obtain the change rule of the parameters with time, and these parameters can provide data support for operation monitoring, fault diagnosis, optimized operation and optimized design; the sensor is arranged on the rotatable detection support, one sensor is expanded from single-point measurement to measurement of any point on a circumference around the rotation axis, and the multiple sensors distributed on the same circumference around the rotation axis are mutual backup and mutual fault diagnosis, so that accurate measurement and rapid fault judgment can be realized with fewer sensors, and a small amount of sensor failure does not affect the detection effect; the rotation of the detection support can effectively reduce the dust and dirt on the sensor, and improve the detection accuracy and stability; the detection support with the hollow design can reduce air resistance and play a flow equalization role; the detection support can be arbitrarily controlled in rotation speed and direction, and can be stopped at any angle, so that the multi-point measurement can be realized quickly on the basis of ensuring the safety of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings are presented by way of example or for purpose of illustration, and not as limitations of the present application. In the drawings:

[0018] Figure 1Structure schematic view of the hydraulic oil radiator heat exchange performance detection device of the embodiment of the present application;

[0019] Figure 2 Structure schematic view of the air inlet parameter distribution detection module of the embodiment of the present application;

[0020] Figure 3 Structure schematic view of the air outlet parameter distribution detection module of the embodiment of the present application;

[0021] Figure 4 Structure schematic view of the fan main shaft driving air inlet detection support and air outlet detection support rotation of the embodiment of the present application.

[0022] In the figure:

[0023] Air cooling radiator 1;

[0024] Cooling fan 2, fan main shaft 21, controllable connection assembly 22;

[0025] Air inlet parameter distribution detection module 3, air inlet detection support 31, air inlet temperature sensor 32, air inlet speed sensor 33;

[0026] Air outlet parameter distribution detection module 4, air outlet detection support 41, air outlet temperature sensor 42, air outlet speed sensor 43, and environment pressure sensor 44;

[0027] Hydraulic oil inlet parameter detection module 5;

[0028] Hydraulic oil outlet parameter detection module 6;

[0029] Radiator surface temperature distribution detection module 7;

[0030] Intelligent detection module 8, receiving unit 81, storage unit 82, and processing unit 83. DETAILED DESCRIPTION

[0031] To make the purpose, technical scheme and advantages of the embodiment of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments of those skilled in the art without creative labor are within the protection scope of the present application.

[0032] Embodiment one

[0033] In the present embodiment, a hydraulic oil radiator heat exchange performance detection device is provided for heat exchange performance detection of a hydraulic oil radiator containing an air cooling radiator 1 and a cooling fan 2, and the structure schematic view is as shown in the figure. Figure 1As shown, including the air inlet parameter distribution detection module 3, arranged in the air inlet side of the air cooling radiator 1; The air inlet parameter distribution detection module 3 contains air inlet detection support 31, the air inlet detection support 31 is provided with a plurality of arrayed air inlet temperature sensors 32, a plurality of arrayed air inlet velocity sensors 33; The air inlet detection support 31 can rotate around the central axis of the cooling fan 2. The measured air inlet parameter at least includes air inlet temperature and air inlet velocity, which is measured by air inlet temperature sensor 32 and air inlet velocity sensor 33. Because the air inlet area is large, the air inlet temperature and the air inlet velocity may not be uniform, so a plurality of arrayed sensors are used for multi-point measurement to improve the accuracy of measurement; In order to facilitate the positioning installation of the arrayed sensor, it is installed on the air inlet detection support 31, which can be quickly and accurately installed by positioning clamp, positioning hole and the like. In order to reduce the number of arrayed sensors, the air inlet detection support 31 can rotate around the central axis of the cooling fan 2, and one sensor is expanded from single-point measurement to measurement of any point on a circle; Of course, the shape of the air inlet detection support 31 should be ensured not to interfere with other structures during rotation, preferably a circle, and the center of the circle is on the central axis of the cooling fan 2; At the same time, any two similar sensors on a circle can be used as backup for each other, which can facilitate the failure and short time without affecting the use; Further, at least three similar sensors can be arranged on a circle, which is beneficial to positioning which one when one of them fails. The rotation of the detection support can also effectively reduce the dust and dirt on the sensor, improve the detection accuracy and stability. The temperature sensor here can be thermocouple, thermal resistance, etc., and the velocity sensor can be hot wire anemometer, pitot tube, etc.

[0034] Further comprising air outlet parameter distribution detection module 4, arranged in the air outlet side of the air cooling radiator 1; The air outlet parameter distribution detection module 4 contains air outlet detection support 41, the air outlet detection support 41 is provided with a plurality of arrayed air outlet temperature sensors 42, a plurality of arrayed air outlet velocity sensors 43, and an environmental pressure sensor 44; The air outlet detection support 41 can rotate around the central axis of the cooling fan 2. The arrangement of the air outlet parameter distribution detection module 4 is similar to that of the air inlet parameter distribution detection module 3, and the similar parts will not be described again. The difference is that the air outlet detection support 41 is also provided with an environmental pressure sensor 44 for obtaining environmental pressure, which is an important parameter required for subsequent calculation of air density; In order to accurately obtain the environmental pressure, the environmental pressure sensor 44 can also be arranged with multiple on a circle with the central axis of the cooling fan 2.

[0035] Generally, the airflow from cooling fan 2 first passes through the intake air parameter distribution detection module 3 to detect the intake air parameters, then through the air-cooled radiator 1 for heat exchange, and finally through the outlet air parameter distribution detection module 4 to detect the outlet air parameters. Of course, another possible arrangement is that cooling fan 2 serves as an exhaust fan and is placed on the downwind side of outlet air parameter distribution detection module 4; in cases of high resistance, cooling fan 2 may also be placed on both the upwind and downwind sides, serving the functions of supplying and exhausting air respectively.

[0036] To reduce air resistance, such as Figure 2 and Figure 3 As shown, the air inlet detection bracket 31 and the air outlet detection bracket 41 are hollow structures, which also serve to equalize airflow. The measuring points of the air inlet temperature sensor 32, air inlet velocity sensor 33, air outlet temperature sensor 42, air outlet velocity sensor 43, and ambient pressure sensor 44 are all installed at the geometric center of the hollow part of the hollow structure to ensure that the bracket does not affect the measurement accuracy. At the same time, the hollow structure can support and protect the sensors.

[0037] The power source for the rotation of the air inlet detection bracket 31 and the air outlet detection bracket 41 around the central axis of the cooling fan 2 can be varied, and can be controlled by separate motors; more preferably, the air inlet detection bracket 31 and the air outlet detection bracket 41 are connected to the fan main shaft 21 of the cooling fan 2 via a controllable connection assembly 22, such as... Figure 4 As shown; when the controllable connection component 22 is in the connected state, the fan spindle 21 drives the air inlet detection bracket 31 and the air outlet detection bracket 41 to rotate; when the controllable connection component 22 is in the disconnected state, the fan spindle 21 cannot drive the air inlet detection bracket 31 and the air outlet detection bracket 41 to rotate. By connecting and disconnecting the controllable connection component 22, the air inlet detection bracket 31 and the air outlet detection bracket 41 can be rotated and stopped at any angle when the measurement point position needs to be changed. Possible implementations of the controllable connection component 22 include electromagnetic connection, controllable negative pressure suction cup connection, etc. When the magnetic force or negative pressure is large, the friction force causes the fan spindle 21 to drive the air inlet detection bracket 31 and the air outlet detection bracket 41 to rotate, thereby controlling the connection or disconnection by controlling the magnitude of the electromagnetic attraction or negative pressure.

[0038] To facilitate control of the rotation speed of the air inlet detection bracket 31 and the air outlet detection bracket 41, and to flexibly realize functions such as speed change, forward rotation, reverse rotation, and stop, the controllable connection component 22 includes a speed gearbox and a clutch. To prevent the sensor from detaching from the bracket, the rotation speed cannot be too high; this can be achieved through a reduction gear set. Generally, to prevent problems such as wire tangling and component interference, too many rotations in one direction are not allowed; a combination of half a rotation forward and half a rotation backward can be used to achieve measurement at any angle within 360°.

[0039] Further comprising a hydraulic oil inlet parameter detection module 5 arranged at the hydraulic oil inlet; the hydraulic oil inlet parameter detection module 5 comprises a hydraulic oil inlet temperature sensor, a hydraulic oil inlet flow sensor. The temperature sensor here can be a thermal resistance, a thermocouple, etc., and the flow sensor can be a vortex flowmeter, a rotor flowmeter, etc., preferably a non-contact measurement such as an ultrasonic flowmeter.

[0040] Further comprising a hydraulic oil outlet parameter detection module 6 arranged at the hydraulic oil outlet; the hydraulic oil outlet parameter detection module 6 comprises a hydraulic oil outlet temperature sensor, a hydraulic oil outlet flow sensor. The arrangement is similar to the hydraulic oil inlet parameter detection module 5, which will not be described here.

[0041] Further comprising a radiator surface temperature distribution detection module 7 comprising a plurality of arrayed surface temperature sensors.

[0042] A feasible implementation is that the surface temperature sensor is a contact temperature sensor, which is arrayed on the surface of the air-cooled radiator 1. The contact temperature sensor here can be a thermal resistance, a thermocouple, etc., which is arrayed on the surface of the air-cooled radiator 1 by patching.

[0043] Another preferred implementation is that the surface temperature sensor is a thermal imager, and the radiator surface temperature distribution detection module 7 comprises at least two thermal imagers respectively used to obtain the surface temperature distribution of the air inlet side and the air outlet side of the air-cooled radiator 1. A single thermal imager can obtain the temperature distribution on the surface.

[0044] More preferably, the surface temperature sensor, here a thermal imager, is arranged on the air inlet detection bracket 31 and / or the air outlet detection bracket 41. Thus, more measurement surfaces are covered by rotating.

[0045] Further comprising an intelligent detection module 8 comprising a receiving unit 81, a storage unit 82, and a processing unit 83. The receiving unit 81, the storage unit 82, and the processing unit 83 are electrically connected.

[0046] The receiving unit 81 is electrically connected with the air inlet parameter distribution detection module 3, the air outlet parameter distribution detection module 4, the hydraulic oil inlet parameter detection module 5, the hydraulic oil outlet parameter detection module 6, and the radiator surface temperature distribution detection module 7, for obtaining real-time parameters detected by each sensor, including air inlet temperature, air inlet speed, air outlet temperature, air outlet speed, ambient pressure, hydraulic oil inlet temperature, hydraulic oil inlet flow, hydraulic oil outlet temperature, and hydraulic oil outlet flow, and sending them to the storage unit 82 and the processing unit 83.

[0047] The storage unit 82 is used to store the real-time parameter combination of the same time input by the receiving unit 81, and prestore the hydraulic oil radiator size information, the installation position information of each detection module, and the heat transfer coefficient calculation formula. Here, all real-time parameters of the same time are packaged as real-time parameter combination for storage, which is convenient for unified calling. The hydraulic oil radiator size information at least contains the air duct flow area, the outer heat transfer area, the hydraulic oil inlet flow area, and the hydraulic oil outlet flow area of the air-cooled radiator 1. The installation position information of each detection module at least contains the initial three-dimensional coordinates of the measuring point and the initial angle of the support. Through the initial three-dimensional coordinates of each measuring point and the rotation angle of the corresponding support, the three-dimensional coordinates of each measuring point after rotation can be conveniently determined through trigonometric function transformation. Here, a Cartesian coordinate system with the central axis of the cooling fan 2 as an axis can be used, and preferably a cylindrical coordinate system established with the central axis of the cooling fan 2 as a central line, that is, the central axis of the cooling fan 2 is the Z axis, and a plane polar coordinate system perpendicular to the Z axis is added.

[0048] The processing unit 83 is configured to control the rotation angle of the air inlet detection support 31 and the air outlet detection support 41 around the geometric center axis of the air duct of the air-cooled radiator 1, and determine the real-time detection position of each detection module according to the rotation angle and the installation position information of each detection module, and store the real-time detection position into the real-time parameter combination; determine the air inlet temperature distribution according to the real-time detection position and the real-time parameter of the array-arranged air inlet temperature sensor 32; determine the air inlet velocity distribution according to the real-time detection position and the real-time parameter of the array-arranged air inlet velocity sensor 33; determine the air outlet temperature distribution according to the real-time detection position and the real-time parameter of the array-arranged air outlet temperature sensor 42; determine the air outlet velocity distribution according to the real-time detection position and the real-time parameter of the array-arranged air outlet velocity sensor 43; determine the surface temperature distribution of the air-cooled radiator 1 according to the real-time detection position and the real-time parameter of the array-arranged surface temperature sensor; determine the average air inlet temperature and the air inlet flow rate according to the air inlet temperature distribution, the air inlet velocity distribution, the ambient pressure and the hydraulic oil radiator size information; determine the average air outlet temperature and the air outlet flow rate according to the air outlet temperature distribution, the air outlet velocity distribution, the ambient pressure and the hydraulic oil radiator size information; determine the heat dissipation amount according to the hydraulic oil inlet temperature, the hydraulic oil inlet flow rate, the hydraulic oil outlet temperature and the hydraulic oil outlet flow rate; determine the heat transfer coefficient according to the average air inlet temperature, the air inlet flow rate, the average air outlet temperature, the air outlet flow rate, the hydraulic oil inlet temperature, the hydraulic oil inlet flow rate, the hydraulic oil outlet temperature, the hydraulic oil outlet flow rate and the pre-stored heat transfer coefficient calculation formula; determine the fouling thermal resistance coefficient according to the heat transfer coefficient at different time; all the data determined by the processing unit 83 are stored in the storage unit 82. The real-time detection position obtained by the processing of the processing unit 83 combined with the real-time parameter combination obtained by each measurement module can determine the real-time parameter of each real-time measurement point position, and the multi-point real-time parameter obtained by the array-arranged sensor can form a real-time parameter distribution. The determination of the average air inlet temperature and the average air outlet temperature can be achieved by arithmetic average, area-weighted average, and more preferably, the average is corrected on the basis of the arithmetic average or the area-weighted average combined with the temperature distribution law obtained by experiment or simulation. The determination process of the average air inlet velocity and the average air outlet velocity is similar, and the flow rate can be determined by multiplying the average velocity by the flow area. Due to the conservation of mass, the inlet flow rate and the outlet flow rate can also be mutually corroborated. These are all existing technologies of fluid mechanics and heat transfer, and will not be described in detail. The change relationship of the heat transfer coefficient, especially the fouling thermal resistance coefficient, with time can reflect the growth of the fouling, and provide a basis for determining the fouling cleaning time.

[0049] In order to more intuitively determine and reflect whether the detected real-time parameter distribution is reasonable, the storage unit 82 also pre-stores a standard parameter distribution and a parameter deviation upper limit. The standard parameter distribution includes a parameter distribution of a standard sample under standard working condition parameters. The standard sample refers to a same model of hydraulic oil radiator after correct installation. The working condition parameters include average inlet air temperature, inlet air flow, environmental pressure, hydraulic oil inlet temperature, and hydraulic oil inlet flow. The standard working condition parameters are a plurality of groups of preset working condition parameters. The processing unit 83 is also used to determine a standard fitting parameter combination under a specific working condition parameter through fitting of a plurality of groups of standard parameter distributions. The parameter deviation distribution is determined through comparison of the real-time parameter combination and the standard fitting parameter combination under the same working condition parameter. The parameter distribution that should exist in a reasonable or standard case is pre-detected and pre-stored as a reference benchmark for determining the reasonableness of the parameter distribution. If the real-time parameter distribution deviates from the reference benchmark too much under the same working condition, it can be determined to be unreasonable. Since the actual working condition is variable and difficult to control, and the number of standard working conditions that can be pre-stored is limited, in order to facilitate comparison under the same working condition, the parameter combination theoretically derived under a specific working condition parameter that is not pre-stored, that is, the standard fitting parameter combination, can be determined through fitting of a plurality of groups of standard parameter distributions. The most common fitting method is interpolation method, least square method, and further linear fitting, piecewise linear fitting, experimental correlation formula fitting method, or even machine learning.

[0050] In order to more intuitively display the real-time parameter distribution and help determine its reasonableness, the intelligent detection module 8 also includes a display unit. The display unit is used to display real-time inlet air temperature distribution, inlet air speed distribution, outlet air speed distribution, outlet air speed distribution, and radiator surface temperature distribution. It can also be used to display the standard fitting parameter distribution and the parameter deviation distribution under a specific working condition parameter. The display method of the temperature distribution, temperature deviation distribution, speed size distribution, and speed size deviation distribution can adopt a contour map, a cloud map, etc. The display method of the speed distribution can adopt a vector diagram and a streamline diagram. In order to more intuitively compare, a certain parameter distribution and the standard fitting parameter distribution of the corresponding working condition can be displayed at the same time, or a certain parameter distribution and the parameter deviation distribution of the corresponding working condition can be displayed at the same time.

[0051] Embodiment Two

[0052] In this embodiment, a radiator is provided with the hydraulic oil radiator heat exchange performance detection device as described in Embodiment One. By integrating the detection device with the radiator, various flow and heat transfer parameters can be detected in real time, which facilitates immediate fault detection, and historical data can provide a basis for subsequent design optimization.

[0053] The above merely describes preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for testing the heat exchange performance of a hydraulic oil radiator, used for testing the heat exchange performance of a hydraulic oil radiator comprising an air-cooled radiator (1) and a cooling fan (2), characterized in that, include: An air intake parameter distribution detection module (3) is installed on the air intake side of the air-cooled radiator (1); The air intake parameter distribution detection module (3) includes an air intake detection bracket (31), which is equipped with a plurality of arrayed air intake temperature sensors (32) and a plurality of arrayed air intake speed sensors (33); the air intake detection bracket (31) can rotate around the central axis of the cooling fan (2); An air outlet parameter distribution detection module (4) is installed on the air outlet side of the air-cooled radiator (1); the air outlet parameter distribution detection module (4) includes an air outlet detection bracket (41), on which are mounted an array of air outlet temperature sensors (42), an array of air outlet speed sensors (43), and an ambient pressure sensor (44); the air outlet detection bracket (41) can rotate around the central axis of the cooling fan (2); A hydraulic oil inlet parameter detection module (5) is installed at the hydraulic oil inlet; the hydraulic oil inlet parameter detection module (5) includes a hydraulic oil inlet temperature sensor and a hydraulic oil inlet flow sensor; A hydraulic oil outlet parameter detection module (6) is installed at the hydraulic oil outlet; the hydraulic oil outlet parameter detection module (6) includes a hydraulic oil outlet temperature sensor and a hydraulic oil outlet flow sensor; The heat sink surface temperature distribution detection module (7) includes several surface temperature sensors arranged in an array. The intelligent detection module (8) includes a receiving unit (81), a storage unit (82), and a processing unit (83); The receiving unit (81) is electrically connected to the air inlet parameter distribution detection module (3), the air outlet parameter distribution detection module (4), the hydraulic oil inlet parameter detection module (5), the hydraulic oil outlet parameter detection module (6), and the radiator surface temperature distribution detection module (7), and is used to acquire the real-time parameters detected by each sensor. The real-time parameters include air inlet temperature, air inlet velocity, air outlet temperature, air outlet velocity, ambient pressure, hydraulic oil inlet temperature, hydraulic oil inlet flow rate, hydraulic oil outlet temperature, and hydraulic oil outlet flow rate, and are sent to the storage unit (82) and the processing unit (83). The storage unit (82) is used to store the real-time parameter combination input by the receiving unit (81) at the same moment, and pre-stores the hydraulic oil radiator size information, the installation position information of each detection module, and the heat transfer coefficient calculation formula. The processing unit (83) is used to control the rotation angle of the air inlet detection bracket (31) and the air outlet detection bracket (41) around the geometric center axis of the air duct of the air-cooled radiator (1), and to determine the real-time detection position of each detection module according to the rotation angle and the installation position information of each detection module, and store it in the real-time parameter combination; it is used to determine the air inlet temperature distribution according to the real-time detection position and real-time parameters of the air inlet temperature sensor (32) arranged in the array; and to determine the air inlet temperature distribution according to the real-time detection position and real-time parameters of the air inlet speed sensor (33) arranged in the array. The following steps are taken: First, determine the air intake velocity distribution; second, determine the air outlet temperature distribution based on the real-time detection positions and parameters of the air outlet temperature sensors (42) arranged in the array; third, determine the air outlet velocity distribution based on the real-time detection positions and parameters of the air outlet velocity sensors (43) arranged in the array; fourth, determine the surface temperature distribution of the air-cooled radiator (1) based on the real-time detection positions and parameters of the surface temperature sensors arranged in the array; fifth, determine the average air intake temperature and air intake flow rate based on the air intake temperature distribution, air intake velocity distribution, ambient pressure, and hydraulic oil radiator size information. The average outlet air temperature and outlet air flow rate are determined based on the outlet air temperature distribution, outlet air velocity distribution, ambient pressure, and hydraulic oil radiator size information. The heat dissipation is determined based on the hydraulic oil inlet temperature, hydraulic oil inlet flow rate, hydraulic oil outlet temperature, and hydraulic oil outlet flow rate; the heat transfer coefficient is determined based on the average inlet air temperature, inlet air flow rate, average outlet air temperature, outlet air flow rate, hydraulic oil inlet temperature, hydraulic oil inlet flow rate, hydraulic oil outlet temperature, hydraulic oil outlet flow rate, and the pre-stored heat transfer coefficient calculation formula; the fouling thermal resistance coefficient is determined based on the heat transfer coefficient at different times; all data determined by the processing unit (83) is stored in the storage unit (82).

2. The hydraulic oil radiator heat exchange performance testing device according to claim 1, characterized in that, The air inlet detection bracket (31) and the air outlet detection bracket (41) are hollow structures. The measuring points of the air inlet temperature sensor (32), air inlet speed sensor (33), air outlet temperature sensor (42), air outlet speed sensor (43), and environmental pressure sensor (44) are all installed at the geometric center of the hollow part of the hollow structure.

3. The hydraulic oil radiator heat exchange performance testing device according to claim 2, characterized in that, The air intake detection bracket (31) and the air outlet detection bracket (41) are connected to the fan spindle (21) of the cooling fan (2) via a controllable connection component (22). When the controllable connection component (22) is in the connected state, the fan spindle (21) drives the air intake detection bracket (31) and the air outlet detection bracket (41) to rotate. When the controllable connection component (22) is in the disconnected state, the fan spindle (21) cannot drive the air intake detection bracket (31) and the air outlet detection bracket (41) to rotate.

4. The hydraulic oil radiator heat exchange performance testing device according to claim 3, characterized in that, The controllable connection assembly (22) includes a gearbox and a clutch.

5. The hydraulic oil radiator heat exchange performance testing device according to claim 4, characterized in that, The surface temperature sensor is a contact temperature sensor, and the array is arranged on the surface of the air-cooled radiator (1).

6. The hydraulic oil radiator heat exchange performance testing device according to claim 4, characterized in that, The surface temperature sensor is a thermal imager. The radiator surface temperature distribution detection module (7) includes at least two thermal imagers, which are used to acquire the surface temperature distribution of the air-cooled radiator (1) on the air inlet side and the air outlet side, respectively.

7. The hydraulic oil radiator heat exchange performance testing device according to claim 6, characterized in that, The surface temperature sensor is mounted on the air inlet detection bracket (31) and / or the air outlet detection bracket (41).

8. The hydraulic oil radiator heat exchange performance testing device according to any one of claims 1 to 7, characterized in that, The storage unit (82) also pre-stores standard parameter distribution and parameter deviation upper limit; the standard parameter distribution includes the parameter distribution of standard sample under standard operating conditions, the standard sample refers to the same model of hydraulic oil radiator after correct installation, the operating conditions include average air inlet temperature, air inlet flow rate, ambient pressure, hydraulic oil inlet temperature, and hydraulic oil inlet flow rate, and the standard operating conditions are several sets of preset operating conditions. The processing unit (83) is also used to determine the standard fitting parameter combination under a specific working condition by fitting multiple sets of standard parameter distributions; and to determine the parameter deviation distribution by comparing the real-time parameter combination with the standard fitting parameter combination under the same working condition.

9. The hydraulic oil radiator heat exchange performance testing device according to claim 8, characterized in that, The intelligent detection module (8) also includes a display unit; The display unit is used to display the real-time inlet air temperature distribution, inlet air velocity distribution, outlet air velocity distribution, outlet air velocity distribution, and radiator surface temperature distribution. It can also be used to display the standard fitting parameter distribution and parameter deviation distribution under specific operating conditions.

10. A radiator, characterized in that, The device for testing the heat exchange performance of a hydraulic oil radiator as described in any one of claims 1 to 9 is provided.

Images