A test platform vehicle device

Abstract

The present application relates to a kind of test platform car device, involve wind tunnel mechanical technical field, including test table, screw lifting mechanism and cooling mechanism.Test table bottom is equipped with V-shaped guide wheel and gyro wheel, respectively with track and ground cooperation.Screw lifting mechanism is arranged in the bottom corner of test table, with the state of switchable suspension and ground state.Cooling mechanism is arranged between test table and V-shaped guide wheel, when screw lifting mechanism is in the state of suspension and V-shaped guide wheel rolls, cooling mechanism starts to cool guide wheel;When screw lifting mechanism is in the state of ground and V-shaped guide wheel stops rolling, cooling mechanism stops running.Compared with prior art, the present application can effectively improve the running stability and life of V-shaped guide wheel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind tunnel machinery, in particular to a platform vehicle device for test. BACKGROUND

[0002] In a wind tunnel test, the test chamber is used as a mounting place for the test section and the contraction section, and the air pressure inside and outside the test chamber needs to be isolated during the test by closing the test chamber door to ensure the test conditions. Due to the limited space of the test chamber, multiple test sections and models need to be frequently transported between the test hall and the test chamber, and the platform vehicle needs to pass through the tunnel between the test chamber and the hall. In order to meet the air cushion transportation requirements of hundreds of tons of components, the platform vehicle must have large load capacity, flat platform, lifting function and good guiding performance, and the platform surface must be flush with the self-leveling floor in the hall and the steel plate surface in the test chamber.

[0003] Through practice, the applicant found that in the prior art, manual transportation and adjustment of hydraulic or screw jacks are often used to realize the lifting and heavy load support of the platform vehicle. The operator needs to manually place, adjust and remove multiple jacks in the narrow tunnel, which is labor-intensive and low in operation efficiency. At the same time, the V-shaped guide wheel of the platform vehicle is prone to overheating during the test, and the service life is short. SUMMARY

[0004] The present application discloses a platform vehicle device for test to solve the technical problems of low operation efficiency and overheating of the V-shaped guide wheel in the related art.

[0005] In order to solve the above problems, the present application adopts the following technical solutions:

[0006] A platform vehicle device for test, comprising: a test table, the bottom of which is rotatably provided with a V-shaped guide wheel and a roller, the V-shaped guide wheel is rollingly arranged on a track in the test chamber tunnel, and the roller is rollingly matched with the ground in the test chamber tunnel; a screw lifting mechanism is arranged at the bottom corner of the test table, the screw lifting mechanism can be lifted in the vertical direction, and the screw lifting mechanism has a switchable suspended state and a ground-contacting state;

[0007] A cooling mechanism is arranged between the test table and the V-shaped guide wheel, and is used for cooling the V-shaped guide wheel when the V-shaped guide wheel rolls on the track; wherein when the screw lifting mechanism is in the suspended state and the V-shaped guide wheel normally rolls in the test chamber tunnel, the cooling mechanism is started and cools the V-shaped guide wheel; when the screw lifting mechanism is in the ground-contacting state and the V-shaped guide wheel stops rolling in the test chamber tunnel, the cooling mechanism automatically stops cooling the V-shaped guide wheel.

[0008] Optionally, the screw lifting mechanism comprises a driving assembly and a lifting assembly, the driving assembly is in transmission connection with the lifting assembly, and the lifting assembly is used to lift in the vertical direction under the action of the driving assembly.

[0009] Optionally, the driving assembly comprises a servo motor, a horizontal screw rod and a horizontal bevel gear, and the lifting assembly comprises a vertical screw rod, a vertical bevel gear, a lifting screw rod and a floor plate, wherein the servo motor is arranged at the bottom of the test bench, the horizontal screw rod is coaxially arranged on the output shaft of the servo motor, and the bottom of the test bench is provided with a hollow shell, and the horizontal screw rod is rotatably arranged in the shell; the vertical screw rod is rotatably arranged in the shell, the vertical bevel gear is coaxially arranged on the vertical screw rod, and the horizontal bevel gear is engaged with the vertical bevel gear; a threaded groove is coaxially arranged in the vertical screw rod, the lower end of the threaded groove is open, the lifting screw rod is threadedly arranged in the threaded groove, the lower end of the lifting screw rod extends out of the shell, and the floor plate is arranged at the lower end of the lifting screw rod; a limiting assembly is further arranged in the shell, and the limiting assembly is used to limit the rotation of the lifting screw rod when the vertical screw rod rotates.

[0010] Optionally, the limiting assembly comprises a limiting column, the limiting column is vertically arranged in the shell, a limiting groove is arranged in the limiting column along the length direction of the limiting column, a limiting block is arranged on the outer wall of the lifting screw rod, and the limiting block is slidably arranged in the limiting groove.

[0011] Optionally, the upper and lower ends of the limiting groove are both closed.

[0012] Optionally, the cooling mechanism comprises a heat exchange assembly and an opening and closing assembly, and the opening and closing assembly is electrically connected with the heat exchange assembly, wherein when the floor plate is in a suspended state and the V-shaped guide wheel normally rolls in the chamber tunnel, the opening and closing assembly is in an open state, so that the heat exchange assembly operates and continuously removes the heat generated by the V-shaped guide wheel when rolling; when the floor plate is in a floor-adhering state and the V-shaped guide wheel stops rolling in the chamber tunnel, the opening and closing assembly is in a closed state, so that the heat exchange assembly stops operating, and the V-shaped guide wheel is cooled by itself at this time.

[0013] Optionally, the opening and closing assembly comprises a battery, a pushing block, a mounting plate, a first conductive sheet, a torsion spring and a second conductive sheet, wherein the battery is installed in the test bench, the pushing block is vertically arranged on the top wall of the floor mat, the mounting plate is vertically arranged on the bottom of the test bench, and the pushing block and the mounting plate are vertically and slidingly attached, a recess is formed on the vertically and slidingly attached surface of the mounting plate and the pushing block, the first conductive sheet is hingedly arranged on the inner bottom wall of the recess through the torsion spring, the torsion spring always has a tendency to make the first conductive sheet rotate away from the second conductive sheet, the second conductive sheet is fixedly arranged on the inner side wall of the recess, the first conductive sheet is electrically connected with the battery through a wire, and the second conductive sheet is electrically connected with the heat exchange assembly through the battery; when the floor mat is in a suspended state and the V-shaped guide wheel normally rolls in the chamber tunnel, the first conductive sheet is attached to the second conductive sheet under the action of the pushing block; when the floor mat is in a floor-adhering state and the V-shaped guide wheel stops rolling in the chamber tunnel, the first conductive sheet is separated from the second conductive sheet under the action of the torsion spring.

[0014] Optionally, an inclined guide surface is arranged between the top wall and the side wall of the pushing block, when the floor mat is in the suspended state, the side wall of the pushing block abuts against the first conductive sheet to drive the first conductive sheet to be attached to the second conductive sheet; when the floor mat is in the floor-adhering state, the inclined guide surface is opposite to the first conductive sheet to leave a rotating gap between the inclined guide surface and the recess, and the first conductive sheet rotates away from the second conductive sheet in the rotating gap under the action of the torsion spring to separate the first conductive sheet from the second conductive sheet.

[0015] Optionally, the heat exchange assembly comprises a cold water tank, a water pump, a hose, a heat exchange hard pipe and a water receiving tank, wherein the cold water tank is arranged on one side of the V-shaped guide wheel in the test bench, the water receiving tank is arranged on the other side of the V-shaped guide wheel in the test bench, the water pump is arranged in the test bench, and the pump inlet end of the water pump is in communication with the inside of the cold water tank, an axial center of the V-shaped guide wheel is provided with a rotating channel, the heat exchange hard pipe is rotatably arranged in the rotating channel, and the length of the heat exchange hard pipe is longer than the length of the rotating channel, one of the two ends of the hose is in communication with one of the two ends of the heat exchange hard pipe, one of the two hoses is in communication with the pump outlet end of the water pump, and the other hose is in communication with the water receiving tank; the second conductive sheet is electrically connected with the water pump through a wire.

[0016] Optionally, the heat exchange hard pipe is made of copper material.

[0017] The technical scheme adopted by the application can achieve the following beneficial effects:

[0018] The application provides a test platform vehicle device, and aims at the problems that a V-shaped guide wheel of a platform vehicle is prone to heat in a high-strength rolling test process, lacks an effective cooling device, is prone to fast wear, unstable operation and shortened service life and the like, and realizes the synergistic effect of state sensing and intelligent cooling control of the guide wheel by constructing a multi-stage linkage screw lifting mechanism, an opening and closing assembly and a heat exchange assembly.The application indirectly controls the conduction of the electric contact in the opening and closing assembly by using the state of being suspended and being attached to the ground of the screw lifting mechanism arranged at the bottom of the test bench, so as to drive the flow and stop of the cold water in the heat exchange assembly, and forms a guide wheel cooling scheme without manual intervention and with certain automatic control function.Meanwhile, the heat exchange hard tube is arranged in the V-shaped guide wheel shaft channel and is made of copper, which significantly improves the heat exchange efficiency without affecting the rotation of the V-shaped guide wheel, is beneficial to reducing the overheating risk of the V-shaped guide wheel, and enhances the stability and safety of the platform vehicle under long-time operation.In summary, the application realizes the organic combination in the aspects of structural design, cooling efficiency and operation control, can prolong the service life of the platform vehicle to a certain extent, improves the continuity and reliability of the test, and has remarkable engineering application value. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 is a state schematic view of the test bench in the chamber tunnel in the embodiment of the present application;

[0021] Figure 2 is a partial sectional view of the test bench in the embodiment of the present application;

[0022] Figure 3 is a partial sectional view for showing the screw lifting mechanism in the embodiment of the present application;

[0023] Figure 4 is a front view of the test bench in the embodiment of the present application;

[0024] Figure 5 is Figure 4 is an enlarged view of A part in

[0025] In the drawings:

[0026] 100, test bench; 110, V-shaped guide wheel; 120, roller; 130, shell; 200, spiral lifting mechanism; 210, driving assembly; 211, servo motor; 212, horizontal lead screw; 213, horizontal bevel gear; 220, lifting assembly; 221, vertical lead screw; 222, vertical bevel gear; 223, lifting screw; 224, ground plate; 300, cooling mechanism; 310, heat exchange assembly; 311, cold water tank; 312, water pump; 313, hose; 314, heat exchange hard tube; 315, water receiving tank; 320, opening and closing assembly; 321, battery; 322, pushing block; 3221, inclined guide surface; 323, mounting plate; 3231, groove; 324, first conductive sheet; 325, torsional spring; 326, second conductive sheet; 400, limiting column; 410, limiting groove; 500, limiting block. DETAILED DESCRIPTION

[0027] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0028] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a category and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0029] The present application will be described in detail below with reference to the accompanying drawings Figures 1 to 5 A test platform vehicle device provided by the present application is described in detail through specific embodiments and application scenarios.

[0030] A test platform vehicle, in combination with Figures 1 to 3It comprises a test bench 100, a spiral lifting mechanism 200 and a cooling mechanism 300; wherein the test bench 100 is of square structure, and two groups of V-shaped guide wheels 110 and a plurality of rollers 120 are arranged on the bottom of the test bench 100 along the length direction. The V-shaped guide wheels 110 are rotatably installed at the longitudinal middle line position of the bottom of the test bench 100, and are designed to roll with the V-shaped guide rails arranged in the chamber tunnel, thereby playing a role of guiding and positioning the platform car. The rollers 120 are arranged at a position close to the spiral lifting mechanism 200, and are used to support the self-weight of the test bench 100 during the movement of the platform car, and to realize rolling contact with the steel plate ground surface of the bottom surface of the chamber tunnel, thereby facilitating manual pushing of the platform car on the horizontal plane.

[0031] Meanwhile, in order to realize high bearing capacity of the platform car after being positioned, four or more spiral lifting mechanisms 200 are installed at the corners of the bottom of the test bench 100. The spiral lifting mechanisms 200 are controlled in a mechanical transmission mode, and can adjust the lifting height in the vertical direction, and have two working states of a suspended state and a ground-contact state. The suspended state refers to that the lifting mechanism is not in contact with the ground, and the platform car is supported as a whole by the rollers 120; the ground-contact state refers to that the lifting mechanism is lowered to a position of supporting the ground, at which time the load of the platform car is directly borne by the lifting mechanism, so as to enhance the overall stability and bearing performance.

[0032] Further, the cooling mechanism 300 is arranged between the V-shaped guide wheels 110 and the test bench 100. The cooling mechanism 300 can be selected in a forced air cooling or liquid cooling mode. The starting condition of the cooling mechanism 300 is that, during the movement of the platform car, the spiral lifting mechanism 200 is in the suspended state, i.e. the platform car has not completed the support switching, and the V-shaped guide wheels 110 are in rolling contact with the rails, at which time the cooling mechanism 300 automatically operates to cool the V-shaped guide wheels 110, so as to avoid performance degradation or deformation of the guide wheels due to long-time rolling friction; when the platform car is positioned, the lifting mechanism is in the ground-contact state and the guide wheels are in the static state, at which time the cooling mechanism 300 stops operating, so as to save energy and avoid unnecessary cooling operation.

[0033] The structure realizes start and stop of the cooling function through automatic linkage control of the lifting state, thereby simplifying the operation process to a certain extent, and improving the use convenience and automation level. In addition, the "ground-contact state" in the embodiment is not limited to that the lifting mechanism completely supports all loads, but can also be understood as a state that the lifting mechanism is in contact with the ground and bears part or all of the load; and the "suspended state" is not limited to that the lifting mechanism is completely suspended, but refers to a structure configuration that the lifting mechanism is not in contact with the ground and is not in the supporting state. Therefore, the test platform car device realizes the above structure configuration, thereby guaranteeing the guiding accuracy and movement performance, and being beneficial to improving the operation efficiency and running reliability of the platform car in the high-frequency wind tunnel test scene.

[0034] In some embodiments, the test platform car device is combined with Figures 1 to 3The spiral lifting mechanism 200 comprises a driving assembly 210 and a lifting assembly 220, wherein the driving assembly 210 is connected with the lifting assembly 220 through a transmission structure, and is used to drive the lifting assembly 220 to realize the lifting function of the platform vehicle in the vertical direction. The driving assembly 210 preferably adopts a servo motor 211 as a power source, which is installed at the bottom of the test bench 100, and is connected with a horizontal lead screw 212 coaxially arranged through an output shaft. The horizontal lead screw 212 is horizontally arranged in a hollow shell 130 installed at the bottom of the test bench 100. A vertical lead screw 221 is arranged inside the shell 130, and is engaged with a horizontal bevel gear 213 on the horizontal lead screw 212 through a vertical bevel gear 222 coaxially arranged thereon. The servo motor 211 drives the horizontal lead screw 212 to rotate, and drives the bevel gear pair to engage, so as to realize the rotation of the vertical lead screw 221. A threaded groove is arranged in the vertical lead screw 221 in the axial direction, and an opening is arranged at the lower end of the threaded groove. The threaded groove is used for threadedly connecting with a lifting screw 223, and the lower end of the lifting screw 223 extends from the bottom of the shell 130, and the end thereof is fixedly connected with a ground plate 224. In order to realize the lifting function and avoid the angular displacement of the lifting screw 223 caused by the rotation of the vertical lead screw 221, a limiting assembly is arranged in the shell 130, which plays a role of limiting the rotation of the lifting screw 223 when the vertical lead screw 221 rotates.

[0035] In this way, when the vertical lead screw 221 rotates, the lifting screw 223 can move axially and linearly under the guidance of the threaded groove, so as to drive the ground plate 224 to lift, and finally realize the lifting conversion operation of the platform vehicle. The structure design simplifies the process of manually arranging the traditional jacks to a certain extent, and is beneficial to improving the lifting efficiency and operation convenience of the platform vehicle. Meanwhile, the limiting assembly can adopt a conventional limiting structure such as an anti-rotation key, a guide groove and a sliding block, and the specific form can be flexibly selected according to the load bearing and structure layout of the platform vehicle, and the implementation is not limited to a single implementation mode. The ground plate 224 is used to contact the ground to provide bearing support, and the size, shape and material thereof can be set according to the actual load condition, and has good contact stability and load distribution capability. The overall structure meets the requirements of heavy load support of the platform vehicle, and is also beneficial to improving the structural reliability and the ability to adapt to various working conditions.

[0036] For example, the limiting assembly comprises a limiting column 400 vertically arranged in the shell 130, a limiting groove 410 is arranged in the limiting column 400 along the length direction thereof, a limiting block 500 is arranged on the outer wall of the lifting screw 223, and the limiting block 500 is slidingly inserted into the limiting groove 410. Through the sliding cooperation of the limiting block 500 and the limiting groove 410, the self-rotation of the lifting screw 223 can be prevented, so that the lifting screw 223 can stably lift in the vertical direction when the vertical lead screw 221 rotates.

[0037] Exemplarily, both the upper end and the lower end of the limiting groove 410 are provided with a sealing cover, so that the lifting screw rod 223 has a certain range of lifting in the vertical direction, and the limiting block 500 is not easy to fall out of the limiting groove 410.

[0038] In some embodiments, in combination with Figure 1 、 Figure 4 and Figure 5 , the cooling mechanism 300 comprises a heat exchange assembly 310 and an opening and closing assembly 320. The heat exchange assembly 310 is used to continuously cool the V-shaped guide wheel 110 of the platform vehicle during movement, so as to improve the wear resistance and service life thereof. The opening and closing assembly 320 is used to control the operation of the heat exchange assembly 310 according to the state of the platform vehicle. The heat exchange assembly 310 can be a forced air cooling unit, which is installed near the circumferential direction or the upper area of the V-shaped guide wheel 110. The cooling air flow of the forced air cooling unit is directed to the surface of the V-shaped guide wheel 110, so as to enhance the heat dissipation efficiency. Alternatively, the heat exchange assembly 310 can be a liquid cooling circulation module, which is driven by a small liquid pump to flow through a heat exchange channel arranged around the guide wheel, so as to remove heat.

[0039] When the platform vehicle is in a moving state, i.e., the floor plate 224 is in a suspended state, the V-shaped guide wheel 110 rolls on the track, and the friction generates a relatively significant heat. At this time, the opening and closing assembly 320 drives the heat exchange assembly 310 to enter an operating state, so as to benefit to a certain extent in avoiding the performance degradation or deformation of the V-shaped guide wheel 110 due to overheating, and ensuring the guiding accuracy and smooth movement. When the platform vehicle stops moving, i.e., the floor plate 224 is in a floor-adhering state, the screw lifting mechanism 200 bears the main load, and the V-shaped guide wheel 110 no longer rotates. At this time, the opening and closing assembly 320 controls the heat exchange assembly 310 to stop operating, and the V-shaped guide wheel 110 is in a natural cooling state, so as to avoid energy waste and reduce the system load or local condensation risk caused by unnecessary cooling. In the embodiment, the recognition of the position state of the floor plate 224 can be realized by a limit switch, a contact sensor or a strain gauge detection support state. The electrical connection between the heat exchange assembly 310 and the opening and closing assembly 320 can be logically judged and executed by a single-chip microcomputer or a relay control system. Through the above structural configuration, the cooling mechanism 300 can automatically start and stop the cooling system according to the state of the platform vehicle without manual intervention, so as to improve the intelligent level and use convenience of the device to a certain extent, and is suitable for the wind tunnel platform vehicle working scene of frequent start and stop and long-time operation.

[0040] In some embodiments, in combination with Figure 1 、 Figure 4 and Figure 5, the opening and closing assembly 320 includes a battery 321, a pushing block 322, a mounting plate 323, a first conductive sheet 324, a torsion spring 325 and a second conductive sheet 326, the battery 321 is a power supply for the heat exchange assembly 310, and the pushing block 322 is a triggering component for realizing the connection and disconnection of the conductive sheet. The pushing block 322 is vertically arranged on the top wall of the floor 224 and can move vertically along with the up-down movement of the floor 224, the mounting plate 323 is fixedly arranged on the bottom of the test bed 100, and a groove 3231 is arranged on the sliding surface of the mounting plate 323, which is used for mounting the first conductive sheet 324 and the second conductive sheet 326. The first conductive sheet 324 is hinged to the bottom wall of the groove 3231 through the torsion spring 325, and the structure design makes it have a natural tendency to rotate away from the second conductive sheet 326 without external force constraint; the second conductive sheet 326 is fixedly arranged on the side wall of the groove 3231 and is in a position that can contact the first conductive sheet 324. In terms of electrical connection, the first conductive sheet 324 is connected with the battery 321 through a wire, and the second conductive sheet 326 is connected with the water pump 312 in the heat exchange assembly 310 through a wire, thereby forming a controllable power supply circuit.

[0041] When the platform vehicle is in a moving state, that is, the floor 224 is suspended, and the V-shaped guide wheel 110 rolls on the track, the pushing block 322 moves upward, the side wall of the pushing block 322 contacts the first conductive sheet 324, and the first conductive sheet 324 is pushed to rotate against the elastic force of the torsion spring 325 in the vertical upward sliding process, so that the first conductive sheet 324 is in contact with the second conductive sheet 326. At this time, the current of the battery 321 can be transmitted to the water pump 312 through the closed circuit, thereby driving the heat exchange assembly 310 to operate.

[0042] Further, the heat exchange assembly 310 includes a cold water tank 311, a water pump 312, a hose 313, a heat exchange hard pipe 314 and a water receiving tank 315, the cold water tank 311 and the water receiving tank 315 are arranged in the test bed 100 respectively and are located on both sides of the V-shaped guide wheel 110, thereby forming a complete cooling circuit. The water inlet of the water pump 312 is connected with the cold water tank 311, the water outlet is connected to the inlet end of the heat exchange hard pipe 314 through a hose 313, the heat exchange hard pipe 314 is rotatably arranged in the rotation channel formed in the axial center of the V-shaped guide wheel 110, and the outlet end of the heat exchange hard pipe 314 is connected with another hose 313, thereby being connected to the water receiving tank 315. The hose 313 is made of flexible material, so as to maintain the stability of the connection under the vibration of the platform vehicle or the rotation state of the guide wheel. The length of the heat exchange hard pipe 314 is longer than the rotation channel and has a certain sliding allowance, so that a cooling path along the axis of the guide wheel is formed without interfering with the free rotation of the guide wheel, and the cold water flowing in the path can exchange heat with the inner wall of the V-shaped guide wheel 110, thereby being beneficial to reducing the heat accumulated in the guide wheel under high-frequency rolling to a certain extent, so as to delay the precision influence and loss risk caused by thermal expansion or material performance degradation.

[0043] When the platform vehicle completes the movement into the test state, i.e., the floor-attached plate 224 is attached to the ground, and the V-shaped guide wheel 110 stops rolling, the floor-attached plate 224 is synchronously lowered with the pushing block 322, and the inclined guide surface 3221 of the pushing block 322 is in turn opposite to the first conductive sheet 324. At this time, the pushing block 322 no longer generates a horizontal force on the first conductive sheet 324, and the first conductive sheet 324 rotates away from the second conductive sheet 326 under the elastic force of the torsion spring 325, thereby breaking the conductive path, and the battery 321 stops supplying power to the water pump 312, and the heat exchange assembly 310 no longer operates, and the cold water flow is terminated. At this time, since the guide wheel stops rotating, the generated heat gradually decreases, and natural heat dissipation can meet the heat dissipation demand, without the need to continue to consume power resources for active cooling. In addition, the pushing block 322 and the first conductive sheet 324 are matched through the inclined guide surface 3221 and the groove 3231 to form a rotation gap, which ensures that the conductive sheets can be reliably disconnected in the attached state, and to some extent, is beneficial to improving the electrical control response stability of the device and the service life of the cooling system. The overall structure realizes the function of linking the platform vehicle operating state and the cooling demand of the V-shaped guide wheel 110, so that active cooling is started when the guide wheel is in a high-heat state, and automatic power-off is achieved after the guide wheel stops working, forming a good energy-saving cooling mechanism, which is suitable for wind tunnel test environments that are started and stopped multiple times or run for a long time.

[0044] For example, the heat exchange hard tube 314 is configured to be made of copper material. Copper material is widely used in the field of heat exchange due to its excellent heat conduction performance. In this embodiment, the heat exchange hard tube 314 is arranged in the axial center channel of the V-shaped guide wheel 110, and plays a role of being coupled with the cold water flow path during the rolling of the V-shaped guide wheel 110. The thermal conductivity of copper material is relatively high, which is beneficial to improving the heat exchange efficiency. When the cold water flows through the copper heat exchange hard tube 314, it can absorb the heat accumulated inside the V-shaped guide wheel 110 to some extent, thereby achieving more effective heat transfer. At the same time, since the heat exchange hard tube 314 needs to have a certain degree of insertion freedom when the V-shaped guide wheel 110 rotates, its structure should have a certain strength and anti-deformation ability. The toughness and stability of copper material are relatively good, which can adapt to the slight deformation caused by vibration, temperature difference or mechanical stress during the test process of the device, thereby reducing the risk of breakage or dislocation of the heat exchange hard tube 314. In addition, copper material is easy to process and shape, so that the thickness and length of the heat exchange hard tube 314 can be accurately controlled during the manufacturing process, thereby being beneficial to the subsequent assembly stability in the rotating channel of the guide wheel. Therefore, by adopting copper material to constitute the heat exchange hard tube 314, the heat exchange efficiency is improved, and the reliability and adaptability of the overall structure are also enhanced, which is suitable for the dynamic cooling demand of the platform vehicle device in the wind tunnel or other high-heat environments.

[0045] It should be noted that, as used herein, the terms "includes," "including," or "has" are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements is not limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0046] Further, it is to be understood that the scope of the present application is not limited to the exact details of construction, mechanism, or arrangement of parts shown and described, nor exclusively to the exact sequence of steps described, for carrying out the methods described in the application, but one skilled in the art could make various changes, modifications, and substitutions thereto without departing from the application. It is also contemplated that features described in relation to certain examples can be combined in other examples.

[0047] The above description is only specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application.

Claims

1. A test platform vehicle device, characterized in that, include: The test bench (100) is provided with a V-shaped guide wheel (110) and a roller (120) at its bottom. The V-shaped guide wheel (110) is rolled on a track in the tunnel, and the roller (120) rolls in cooperation with the ground in the tunnel. A spiral lifting mechanism (200) is located at the bottom corner of the test bench (100). The spiral lifting mechanism (200) can move up and down in the vertical direction. The spiral lifting mechanism (200) has a switchable suspended state and a ground-level state. A cooling mechanism (300) is located between the test bench (100) and the V-shaped guide wheel (110) to cool the V-shaped guide wheel (110) when it rolls on the track; wherein, When the spiral lifting mechanism (200) is in a suspended state and the V-shaped guide wheel (110) is rolling normally in the embankment tunnel, the cooling mechanism (300) is activated and the V-shaped guide wheel (110) is cooled down. When the spiral lifting mechanism (200) is in a ground-level state and the V-shaped guide wheel (110) stops rolling in the embankment tunnel, the cooling mechanism (300) automatically stops cooling the V-shaped guide wheel (110).

2. The experimental platform vehicle device according to claim 1, characterized in that, The spiral lifting mechanism (200) includes a drive assembly (210) and a lifting assembly (220). The drive assembly (210) is connected to the lifting assembly (220) in a transmission manner. The lifting assembly (220) is used to achieve vertical lifting under the action of the drive assembly (210).

3. The experimental platform vehicle device according to claim 2, characterized in that, The drive assembly (210) includes a servo motor (211), a horizontal lead screw (212), and a horizontal bevel gear (213). The lifting assembly (220) includes a vertical lead screw (221), a vertical bevel gear (222), a lifting screw (223), and a floor plate (224). The servo motor (211) is located at the bottom of the test bench (100), the horizontal lead screw (212) is coaxially located on the output shaft of the servo motor (211), and the bottom of the test bench (100) is provided with a hollow housing (130), and the horizontal lead screw (212) is rotatably inserted into the housing (130). The vertical lead screw (221) is rotatably disposed within the housing (130), the vertical bevel gear (222) is coaxially disposed on the vertical lead screw (221), and the horizontal bevel gear (213) meshes with the vertical bevel gear (222); The vertical lead screw (221) has a threaded groove coaxially inside, with an opening at the lower end of the threaded groove. The lifting screw (223) is threaded into the threaded groove, and the lower end of the lifting screw (223) extends out of the housing (130). The floor plate (224) is located at the lower end of the lifting screw (223). The housing (130) is also provided with a limiting component, which is used to limit the rotation of the lifting screw (223) when the vertical lead screw (221) rotates.

4. The experimental platform vehicle device according to claim 3, characterized in that, The limiting component includes a limiting post (400), which is vertically disposed inside the housing (130). The limiting post (400) has a limiting groove (410) along its length. A limiting block (500) is provided on the outer wall of the lifting screw (223), and the limiting block (500) is slidably inserted into the limiting groove (410).

5. The experimental platform vehicle device according to claim 4, characterized in that, Both ends of the limiting groove (410) are sealed.

6. The experimental platform vehicle device according to claim 3, characterized in that, The cooling mechanism (300) includes a heat exchange component (310) and an opening / closing component (320), wherein the opening / closing component (320) is electrically connected to the heat exchange component (310), wherein, When the floor (224) is suspended and the V-shaped guide wheel (110) is rolling normally in the embankment tunnel, the opening and closing assembly (320) is in the open state so that the heat exchange assembly (310) can operate and continuously remove the heat generated when the V-shaped guide wheel (110) is rolling. When the floor (224) is in the ground-mounted state and the V-shaped guide wheel (110) stops rolling in the sump tunnel, the opening and closing assembly (320) is in the closed state so that the heat exchange assembly (310) stops running. At this time, the V-shaped guide wheel (110) cools down by itself.

7. The experimental platform vehicle device according to claim 6, characterized in that, The opening and closing assembly (320) includes a battery (321), a push block (322), a mounting plate (323), a first conductive sheet (324), a torsion spring (325), and a second conductive sheet (326), wherein, The battery (321) is installed inside the test bench (100), and the push block (322) is vertically mounted on the top wall of the floor (224); The mounting plate (323) is vertically disposed at the bottom of the test bench (100), and the push block (322) slides vertically against the mounting plate (323); The mounting plate (323) and the pushing block (322) are vertically slidably attached with a groove (3231) on their surfaces. The first conductive sheet (324) is hinged to the inner bottom wall of the groove (3231) by a torsion spring (325), and the torsion spring (325) always has a tendency to rotate the first conductive sheet (324) away from the second conductive sheet (326). The second conductive sheet (326) is fixedly mounted on the inner side wall of the groove (3231). The first conductive sheet (324) is electrically connected to the battery (321) through a wire, and the second conductive sheet (326) is electrically connected to the heat exchange assembly (310) through the battery (321). When the floor (224) is suspended and the V-shaped guide wheel (110) is rolling normally in the embankment tunnel, the first conductive sheet (324) is in contact with the second conductive sheet (326) under the action of the push block (322); When the floor (224) is in a ground-mounted state and the V-shaped guide wheel (110) stops rolling in the embankment tunnel, the first conductive sheet (324) separates from the second conductive sheet (326) under the action of the torsion spring (325).

8. The experimental platform vehicle device according to claim 7, characterized in that, An inclined guide surface (3221) is provided between the top wall and the side wall of the push block (322). When the floor (224) is in a suspended state, the side wall of the push block (322) abuts against the first conductive sheet (324) to drive the first conductive sheet (324) to adhere to the second conductive sheet (326). When the flooring (224) is in the grounding state, the inclined guide surface (3221) is directly opposite the first conductive sheet (324) so ​​that a rotation gap is left between the inclined guide surface (3221) and the groove (3231). Under the action of the torsion spring (325), the first conductive sheet (324) rotates away from the second conductive sheet (326) in the rotation gap so that the first conductive sheet (324) and the second conductive sheet (326) are separated.

9. The experimental platform vehicle device according to claim 7, characterized in that, The heat exchange assembly (310) includes a cold water tank (311), a water pump (312), a hose (313), a heat exchange rigid pipe (314), and a water receiving tank (315), wherein, The cold water tank (311) is located inside the test bench (100) on one side of the V-shaped guide wheel (110), and the water receiving tank (315) is located inside the test bench (100) on the other side of the V-shaped guide wheel (110). The water pump (312) is located inside the test bench (100), and the pump inlet end of the water pump (312) is connected to the inside of the cold water tank (311); The V-shaped guide wheel (110) has a rotating channel through its axial center. The heat exchange hard tube (314) is rotatably inserted into the rotating channel, and the length of the heat exchange hard tube (314) is longer than the length of the rotating channel. The hose (313) is connected to each end of the heat exchange rigid tube (314), one hose (313) is connected to the pump outlet end of the water pump (312), and the other hose (313) is connected to the water receiving tank (315). The second conductive sheet (326) is electrically connected to the water pump (312) via a wire.

10. The experimental platform vehicle device according to claim 9, characterized in that, The heat exchange tube (314) is configured to be made of copper.

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