Engine cooler air flow resistance test device

Abstract

The utility model discloses an engine cooler air flow resistance test device which comprises a shell filled with heat preservation cotton, an air inlet pipe is arranged at one end of the shell, an air outlet pipe is arranged at the other end of the shell, a heater is arranged in the shell, one end of the air inlet pipe is connected with an inlet of the heater, and the other end of the air inlet pipe is connected with an outlet of a cooler through a pipeline. A pressure sensor, a flow meter and a first temperature sensor are arranged on the air inlet pipe, a bypass pipe is arranged on the air inlet pipe, and the bypass pipe can inject normal-temperature air into the air inlet pipe through an adding pump; one end of the air outlet pipe is connected with an outlet of the heater, and the other end of the air outlet pipe is connected with an inlet of the cooler through a pipeline; a heating element is arranged in the heater; and a third temperature sensor for detecting the temperature of the heating element is arranged at the upper end of the heater. Hot air circularly enters the cooler through the device, and the temperature and pressure of the hot air entering the cooler can be adjusted, so that the cooler can carry out a flow resistance test at a high temperature of 700 DEG C.

Description

Technical Field

[0001] The utility model belongs to the technical field of engine cooler detection, and relates to an air flow resistance test device for an engine cooler. Background Technique

[0002] In modern engine technology, the cooler plays a crucial role. It can effectively reduce the high temperature generated during the operation of the engine and ensure that the engine operates within a safe temperature range. The flow resistance characteristic of the cooler is a key indicator for measuring its performance.

[0003] Engine coolers usually need to operate in a complex working environment, which involves the interaction of high-temperature gases and coolant. To accurately evaluate the performance of the cooler, it is necessary to test its flow resistance under specific conditions. Under the current technical requirements, it is necessary to introduce high-temperature gas at 700°C and coolant into the cooler, and the flow resistance is calculated by measuring the decrease in gas pressure.

[0004] The importance of this test method lies in that it can simulate the fluid flow situation of the cooler under actual working conditions, thereby providing an important basis for the design and optimization of the engine. If the flow resistance of the cooler is too large, it will lead to a decrease in the heat dissipation efficiency of the engine, affecting the performance and reliability of the engine. On the contrary, if the flow resistance is too small, it may affect the stability of the cooling system.

[0005] However, the existing test schemes have limitations and cannot perform flow resistance tests on the cooler at a high temperature of 700°C. This poses certain challenges to the research and production of engines. Content of the Utility Model

[0006] The purpose of the utility model is to provide an air flow resistance test device for an engine cooler, which can perform flow resistance tests on the cooler at a high temperature of 700°C through temperature adjustment.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] An engine cooler air flow resistance test device includes a housing filled with thermal insulation cotton. One end of the housing is provided with an intake pipe, and the other end is provided with an exhaust pipe. A heater is arranged inside the housing. One end of the intake pipe is connected to the inlet of the heater, and the other end is connected to the outlet of the cooler through a pipeline. A pressure sensor, a flow meter, and a first temperature sensor are arranged on the intake pipe. A bypass pipe is arranged on the intake pipe, and the bypass pipe can inject normal temperature air into the intake pipe through an increasing pump. One end of the exhaust pipe is connected to the outlet of the heater, and the other end is connected to the inlet of the cooler through a pipeline. A second temperature sensor is arranged on the exhaust pipe. A heating element is arranged inside the heater, and a third temperature sensor for detecting the temperature of the heating element is arranged at the upper end of the heater.

[0009] As a further improvement of an embodiment of the present invention, the number of heaters inside the housing is two. The lower end of one heater is communicated with the intake pipe, and the lower end of the other heater is communicated with the exhaust pipe. The upper ends of the two heaters are connected through a communicating pipeline.

[0010] As a further improvement of an embodiment of the present invention, a first guide plate for guiding the air flow to flow upward is arranged inside the heater communicated with the intake pipe, and a second guide plate for guiding the air flow to flow downward is arranged inside the heater communicated with the exhaust pipe. The first guide plate and the second guide plate are both located below the intake pipe.

[0011] As a further improvement of an embodiment of the present invention, a sewage discharge pipe extending to the outside of the housing is arranged at the bottom of the heater.

[0012] As a further improvement of an embodiment of the present invention, flange plates are arranged at one end of the intake pipe, one end of the exhaust pipe, and one end of the sewage discharge pipe outside the housing.

[0013] As a further improvement of an embodiment of the present invention, the heating element is composed of a plurality of vertically distributed heating tubes. The heating tube is composed of a metal protective sleeve and a heating wire. The heating wire is located on the central axis of the metal protective sleeve, and an insulating filler is tightly filled in the gap between the heating wire and the metal protective sleeve.

[0014] As a further improvement of an embodiment of the present invention, the metal protective sleeve is a sleeve made of austenitic chromium-nickel stainless steel, the heating wire is a nickel-chromium alloy wire, and the insulating filler is electrical grade magnesium oxide powder.

[0015] As a further improvement of an embodiment of the present utility model, a junction box is provided at the upper end of the heater, the upper end of the heating tube is exposed in the junction box, the third temperature sensor is arranged in the junction box and a wiring hole is provided on the junction box; the heat preservation cotton in the outer shell is located below the junction box.

[0016] Adopting the above technical solution, the following beneficial effects are achieved: By circulating the hot air into the cooler through this device and conducting it in a cycle, the temperature and pressure entering the cooler can be adjusted, so as to meet the requirement that the cooler can perform a flow resistance test at a high temperature of 700 °C. Description of the Drawings

[0017] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0018] The structures, ratios, sizes, etc. illustrated in this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical substance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model.

[0019] Figure 1 It is the front view structure schematic diagram provided by the present utility model.

[0020] Figure 2 It is the top view structure schematic diagram provided by the present utility model.

[0021] Figure 3 It is the schematic diagram of the usage state process provided by the present utility model.

[0022] In the figure:

[0023] 1 - Outer shell; 2 - Heat preservation cotton; 3 - Air inlet pipe; 4 - Air outlet pipe; 5 - Heater; 6 - Cooler; 7 - Pressure sensor; 8 - First temperature sensor; 9 - Second temperature sensor; 10 - Heating element; 11 - First deflector; 12 - Junction box; 13 - Connecting pipe; 14 - Flowmeter; 15 - Second deflector; 16 - Drain pipe. Specific Embodiments

[0024] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in combination with the embodiments.

[0025] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0026] In the present utility model, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" are usually in reference to the direction shown in the drawings, or in reference to the vertical, perpendicular or gravitational direction of the component itself; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation words are not used to limit the present utility model. Embodiment

[0027] See Figures 1 - 3 As shown, an air flow resistance test device for an engine cooler includes a housing 1 filled with heat insulation cotton 2, where the heat insulation cotton 2 can effectively reduce heat dissipation, creating a relatively stable temperature environment for the entire test device and ensuring the accuracy of test results. One end of the housing 1 is provided with an intake pipe 3, and the other end is provided with an exhaust pipe 4. A heater 5 is arranged inside the housing 1. One end of the intake pipe 3 is connected to the inlet of the heater 5, and the other end is connected to the outlet of the cooler 6 through a pipeline. The intake pipe 3 is equipped with a plurality of important detection components. The pressure sensor 7 is responsible for real-time monitoring of the air pressure inside the pipe, the flowmeter 14 accurately measures the air flow rate, and the first temperature sensor 8 always monitors the air temperature. Moreover, a bypass pipe is arranged on the intake pipe 3, and this bypass pipe has a special function. It can inject normal temperature air into the intake pipe with an increase pump, thereby meeting the diverse requirements for air temperature and flow rate under different test conditions.

[0028] One end of the exhaust pipe 4 is connected to the outlet of the heater 5, and the other end is connected to the inlet of the cooler 6 through a pipeline. A second temperature sensor 9 is arranged on the exhaust pipe 4, which can accurately measure the air temperature flowing out of the heater 5 and about to enter the cooler 6. A heating element 10 is arranged inside the heater 5, and this heating element 10 is the key component for generating heat. To ensure the safe operation of the heating element 10 and accurately control the heating temperature, a third temperature sensor for detecting the temperature of the heating element is arranged at the upper end of the heater 5. Through the coordinated work of these components, the test device can comprehensively and accurately test the air flow resistance of the engine cooler, providing reliable data support for the performance evaluation and optimization of the engine cooler.

[0029] Specifically, two heaters 5 are arranged inside the outer shell 1. The lower end of one heater is communicated with the intake pipe 3. When air enters from the intake pipe 3, this heater can heat-treat the air, changing parameters such as the temperature of the air, so as to simulate the intake state under different working conditions. The lower end of the other heater is communicated with the outlet pipe 4, and its function is to heat the air flowing through the outlet pipe 4 or maintain a specific temperature state. Moreover, the upper ends of the two heaters are connected by a communication pipe 13. This connection method enables operations such as heat transfer or pressure balance adjustment between the two heaters, ensuring that the air inside the entire device can be in a controllable and stable thermal state when passing through different paths, thereby improving the accuracy of the air flow resistance test for the engine cooler.

[0030] Furthermore, a first guide vane 11 for guiding the air flow to flow upward is arranged inside the heater communicated with the intake pipe 3. The first guide vane 11 can guide the air flow entering the heater, making the air flow flow in a predetermined direction, that is, upward. This upward air flow direction helps the air flow to be evenly distributed inside the heater, ensuring the uniformity of heating.

[0031] And a second guide vane 15 for guiding the air flow to flow downward is arranged inside the heater communicated with the outlet pipe 4. The presence of the second guide vane 15 enables the air flow entering this heater to flow downward. Both the first guide vane 11 and the second guide vane 15 are located below the intake pipe. Such a layout arrangement helps to construct a reasonable air flow path inside the entire test device. By guiding the air flow direction, the flow of air in the heaters communicated with the intake and outlet pipes becomes more orderly, thereby improving the stability of the entire device and the accuracy of the test, and more precisely simulating the air flow resistance situation of the engine cooler under different working conditions.

[0032] In this embodiment, the heating element 10 is composed of a number of vertically distributed heating tubes. This vertically distributed manner helps the uniform transfer of heat inside the heater. The heating tube is composed of a metal protective sleeve and a heating wire. The heating wire is located on the central axis of the metal protective sleeve. This layout manner enables the heat generated by the heating wire to diffuse evenly around.

[0033] The space between the heating wire and the metal protective sleeve is tightly filled with an insulating filler. Specifically, the metal protective sleeve is a sleeve made of austenitic chromium-nickel stainless steel, which has good high-temperature resistance and corrosion resistance, can adapt to the complex working environment inside the heater, and ensure that the metal protective sleeve can still work stably under high temperature and possible corrosion factors to protect the internal heating wire. The heating wire is a nickel-chromium alloy wire, which has a relatively high resistivity and can efficiently generate heat when energized to meet the heat output requirements of the heater. The insulating filler is electrical-grade magnesium oxide powder, which is an ideal insulating material and can maintain good insulation performance at high temperatures, preventing current from leaking from the heating wire to the metal protective sleeve, thus ensuring the normal operation of the heating tube and improving the safety of the entire heating element at the same time.

[0034] In this embodiment, a drain pipe 16 extending to the outside of the housing 1 is provided at the bottom of the heater 5. During the operation of the heater, due to various reasons, some impurities, sediments or other pollutants may be generated. If these substances accumulate in the heater, they may affect the performance of the heater, such as reducing the heating efficiency and interfering with the normal flow of the air flow. The setting of the drain pipe 16 provides a convenient channel for discharging these pollutants in time, and can directly discharge impurities and the like to the outside of the housing 1, which is convenient for cleaning and maintenance, so as to ensure that the heater 5 can work continuously and stably and ensure the normal operation of the entire engine cooler air flow resistance test device.

[0035] Furthermore, flanges are provided at one end of the intake pipe 3, one end of the outlet pipe 4, and one end of the drain pipe 16 outside the housing 1. The setting of the flange has important significance. At one end of the intake pipe 3, the flange facilitates its firm connection with the outlet of the cooler 6 or other related pipes and equipment to ensure that there are no leakage problems during the air transmission process. The flange at one end of the outlet pipe 4 is also used to tightly connect with the inlet of the cooler 6 or other components to ensure the tightness of the entire gas circulation path. The flange at one end of the drain pipe 16 helps the connection between the drain pipe and an external sewage disposal device or collection container, which is convenient for regularly cleaning impurities and other waste in the heater 5.

[0036] In this embodiment, a junction box 12 is provided at the upper end of the heater 5. The upper end of the heating tube is exposed in the junction box 12, and the junction box 12 provides a centralized area for the circuit connection of the heating tube. Here, the connection of the wires can be conveniently carried out to realize the energization operation of the heating tube, so that the heating wire in the heating tube can work normally to generate heat.

[0037] The third temperature sensor is arranged inside the junction box. Since the upper end of the heating tube is inside the junction box 12 and the operating state of the heating tube directly affects its temperature, arranging the third temperature sensor here can accurately detect the temperature of the heating element. Moreover, wiring holes are provided on the junction box, which facilitate the access of external wires to the junction box so as to connect with the heating tube, and also facilitate the inspection and maintenance of the internal circuit.

[0038] The heat-insulating cotton inside the housing 1 is located below the junction box 12. This layout of the heat-insulating cotton helps to reduce the upward loss of heat. On the one hand, the heat-insulating cotton mainly plays a heat-insulating role for the space around the heater 5, ensuring that more heat is concentrated in the required area and improving the heating efficiency; on the other hand, arranging the junction box 12 above the heat-insulating cotton avoids the possible interference of the heat-insulating cotton on the circuit connection, ensuring the stability and safety of the electrical connection inside the junction box 12.

[0039] During use, external air with a specified pressure enters the heater 5 through the intake pipe 3 for heating to form hot air. After the temperature of the hot air reaches 700 °C, it is injected into the cooler 6 through the outlet pipe 4 for an air flow resistance test. The hot air after passing through the cooler 6 will cool down to 300 °C. The above-cooled hot air re-enters the heater 5 through the intake pipe 3 for heating, forming an air circulation between the heater 5 and the cooler 6 to achieve the test of the air flow resistance of the cooler at 700 °C.

[0040] During use, the entire test process proceeds in an orderly manner according to a specific process. First, external air with a specified pressure enters the heater 5 through the intake pipe 3. The intake pipe 3 can ensure the stable inflow of air into the heater 5, and the pressure sensor 7 equipped on the intake pipe 3 can accurately monitor the air pressure to ensure that the inflowing air pressure meets the test requirements.

[0041] The air entering the heater 5 is immediately heated. The heating element 10 (composed of several vertically distributed heating tubes) in the heater 5 starts to work, heating the air to form hot air. In this process, the nickel-chromium alloy wire in the heating tube generates heat after being energized, and the heat is transferred to the air through the metal sheath made of austenitic chromium-nickel stainless steel. During the heating process, the temperature of the hot air needs to reach 700 °C. This high-temperature state is to simulate the air temperature faced by the cooler in a specific engine operating environment.

[0042] When the temperature of the hot air reaches 700 °C, it is injected into the cooler 6 from the outlet pipe 4 for air flow resistance testing. In the cooler 6, the hot air will exchange heat and thus cool down. The hot air after passing through the cooler 6 will cool down to 300 °C. At this time, the cooled hot air is re-entered into the heater 5 from the inlet pipe 3 for heating, thus forming an air cycle between the heater 5 and the cooler 6. Through this cycle mode, the air flow resistance of the cooler at 700 °C can be continuously tested, so as to comprehensively and accurately evaluate the performance of the cooler under specific high-temperature working conditions.

[0043] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] It should be noted that the terms used herein are only for describing specific embodiments, rather than intending to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0046] The above are only the preferred embodiments of the present invention, and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air flow resistance test device for an engine cooler, characterized in that: It includes a housing filled with thermal insulation cotton. An air inlet pipe is provided at one end of the housing, and an air outlet pipe is provided at the other end. A heater is arranged inside the housing. One end of the air inlet pipe is connected to the inlet of the heater, and the other end is connected to the outlet of the cooler through a pipeline. A pressure sensor, a flow meter, and a first temperature sensor are arranged on the air inlet pipe. A bypass pipe is arranged on the air inlet pipe, and the bypass pipe can inject normal temperature air into the air inlet pipe through an increasing pump. One end of the air outlet pipe is connected to the outlet of the heater, and the other end is connected to the inlet of the cooler through a pipeline. A second temperature sensor is arranged on the air outlet pipe. A heating element is arranged inside the heater, and a third temperature sensor for detecting the temperature of the heating element is arranged at the upper end of the heater.

2. The engine cooler air flow resistance test device according to claim 1, characterized in that: The number of heaters inside the housing is two. The lower end of one heater is communicated with the air inlet pipe, and the lower end of the other heater is communicated with the air outlet pipe. The upper ends of the two heaters are connected through a communicating pipeline.

3. The engine cooler air flow resistance test device according to claim 2, characterized in that: A first guide plate for guiding the air flow to flow upward is arranged inside the heater communicated with the air inlet pipe, and a second guide plate for guiding the air flow to flow downward is arranged inside the heater communicated with the air outlet pipe. Both the first guide plate and the second guide plate are located below the air inlet pipe.

4. The engine cooler air flow resistance test device according to any one of claims 1 to 3, characterized in that: A sewage discharge pipe extending to the outside of the housing is arranged at the bottom of the heater.

5. The engine cooler air flow resistance test device according to claim 4, characterized in that: Flange plates are arranged at one ends of the air inlet pipe, the air outlet pipe, and the sewage discharge pipe outside the housing.

6. The engine cooler air flow resistance test device according to claim 5, characterized in that: The heating element is composed of a number of vertically distributed heating tubes. The heating tube is composed of a metal protective sleeve and a heating wire. The heating wire is located on the central axis of the metal protective sleeve, and the gap between the heating wire and the metal protective sleeve is tightly filled with an insulating filler.

7. The engine cooler air flow resistance test device according to claim 6, characterized in that: The metal protective sleeve is a sleeve made of austenitic chromium-nickel stainless steel. The heating wire is a nickel-chromium alloy wire, and the insulating filler is electrical grade magnesium oxide powder.

8. The engine cooler air flow resistance test device according to claim 6, characterized in that: A junction box is arranged at the upper end of the heater. The upper ends of the heating tubes are exposed inside the junction box. The third temperature sensor is arranged inside the junction box, and wiring holes are provided on the junction box. The thermal insulation cotton inside the housing is located below the junction box.

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