Wheel testing device and testing method for wheel testing device

Abstract

The invention relates to the field of wheel testing, and discloses a wheel testing device and a testing method for the wheel testing device, and the wheel testing device comprises a platform which is provided with a measuring surface; the supporting component is arranged on the platform and provided with a first measuring part, the first measuring part is located on the measuring surface and connected with a wheel, and the first measuring part is used for measuring the stress F1 of the wheel; at least part of the driving part is located on the measuring surface and used for driving the wheel to move, and the driving part is provided with a second measuring part for measuring the stress F2 of the wheel. According to the wheel testing device designed by the invention, by arranging the supporting component and the driving component, the aerodynamic force of the wheel can be isolated from the stress of other structures of the wheel testing device, and the wheel is prevented from being interfered by other structures in the testing process.

Description

Technical Field

[0001] The invention relates to the field of wheel testing, and in particular to a wheel testing device and a testing method for the wheel testing device. Background Art

[0002] In the related art, the wind resistance caused by the wheels accounts for a large proportion of the vehicle's wind resistance, and the aerodynamic characteristics of the wheels directly affect the wind resistance level of the entire vehicle. During the wheel selection process, the wheel's wind resistance needs to be tested using a wheel testing device. In the prior art, other structures are provided between the bracket supporting the wheel and the force measuring device of the wheel testing device. The wheel testing device itself has a complex structure, which greatly interferes with the wheel test, and the wheel test results are inaccurate. In addition, the wheel testing device has limited test items, making it difficult to test the lift and lateral force of the wheel in contact with the contact strip. The test results are one-sided and the test accuracy is low. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a wheel testing device. The wheel testing device designed according to the present invention can isolate the aerodynamic force of the wheel from the forces of other structures of the wheel testing device by providing a supporting component and a driving component, thereby preventing the wheel from being disturbed by other structures during the test process.

[0004] The present invention also provides a testing method for the wheel testing device.

[0005] The wheel testing device according to the present invention comprises: a platform, which has a measuring surface; a supporting component, which is arranged on the platform and is provided with a first measuring part, the first measuring part is located on the measuring surface and is connected to the wheel, and the first measuring part is used to measure the force F1 applied to the wheel; and a driving component, at least a part of which is located on the measuring surface and is used to drive the wheel to move, and the driving component is provided with a second measuring part to measure the force F2 applied to the wheel.

[0006] According to the present invention, the wheel testing device is provided with a supporting component and a driving component to connect the wheel between the supporting component and the driving component. The forces of structures outside the supporting component and the driving component, such as the platform and the like, will not be introduced into the measurement data of the first measuring part and the second measuring part. The mechanical force between the wheel and the supporting component and the driving component becomes the internal force of the system of the wheel testing device, which will be offset in the coupling process of the first measuring part and the second measuring part. The force exerted on the wheel can be directly decoupled and measured by the first measuring part and the second measuring part. When the wheel rotation is realized by mechanical transmission, there is no need to indirectly deduct the mechanical force and the aerodynamic force exerted on the wheel testing device exposed to the airflow, thereby reducing the interference to the wheel test, improving the accuracy of the wheel test results, and improving the test precision.

[0007] According to some embodiments of the present invention, the driving component includes: a base, at least a portion of the base is spaced apart from the platform; a driving member, the driving member is arranged on the side of the base facing the platform and is located on the measuring surface, the driving member is suitable for contacting the wheel and driving the wheel to move, and the driving member is spaced apart from the platform; a second measuring part, the second measuring part is arranged on the base or the driving member and is suitable for measuring the force F2' applied to the driving member, wherein F2' is equal to F2 in magnitude and opposite in direction.

[0008] According to some embodiments of the present invention, a measuring port is provided through the platform in the thickness direction, the measuring surface is formed on one side of the platform in the thickness direction, and the base is located on the other side of the platform in the thickness direction; the projection of the driving member in the thickness direction of the platform is located within the projection of the measuring port in the thickness direction of the platform, and the driving member is spaced apart from the edge of the measuring port.

[0009] According to some embodiments of the present invention, the driving member is configured as a driving belt, wherein the driving belt has a driving surface suitable for contacting the wheel, and the driving surface is flush with the measuring surface.

[0010] According to some embodiments of the present invention, the supporting component includes: a support, which is protruded from the measuring surface; a support rod, one end of which is connected to the support, the other end of which extends in a direction away from the support, and the support rod is parallel to the measuring surface; a first measuring part, one end of which is connected to the other end of the support rod, the other end of which is rotatably connected to the wheel, and the first measuring part is spaced apart from the platform.

[0011] According to some embodiments of the present invention, the first measuring part includes: a connecting head, which is rotatably connected to the wheel; a measuring rod, one end of which is connected to the other end of the support rod, and the other end of the measuring rod is connected to the connecting head, and the measuring rod is suitable for measuring the force F1 applied to the wheel.

[0012] According to some embodiments of the present invention, the measuring rod includes: a fairing, an installation channel is formed inside the fairing, both ends of the fairing are open and form a first open opening and a second open opening respectively, the first open opening is connected to the other end of the support rod; a rod-type balance, the rod-type balance is penetrated through the installation channel and spaced apart from the inner wall surface of the installation channel, one end of the rod-type balance extends out of the installation channel from the first open opening and is connected to the other end of the support rod, the other end of the rod-type balance extends out of the installation channel from the second open opening and is connected to the connecting head, and the rod-type balance is suitable for measuring the wheel force F1.

[0013] According to some embodiments of the present invention, the other end of the support rod is formed with a plug-in protrusion suitable for being received in the first open opening, and the plug-in interface is formed on the plug-in protrusion; a plug-in channel connected to the plug-in interface is formed inside the support rod, and one end of the rod-type balance extends into the plug-in channel through the plug-in interface.

[0014] According to some embodiments of the present invention, a first through-hole is further formed on the periphery of the support rod, the first through-hole is arranged through the other end of the support rod and is connected with the plug-in channel; a second through-hole corresponding to the first through-hole is formed on the periphery of the rod-type balance, the second through-hole is arranged through one end of the rod-type balance; a fastener is passed through the first through-hole and the second through-hole to fix the support rod to the rod-type balance.

[0015] According to some embodiments of the present invention, the connector is formed with a plug-in interface and a plug-in channel connected to the plug-in interface, and the other end of the rod-type balance extends into the plug-in channel through the plug-in interface.

[0016] According to some embodiments of the present invention, a third through-hole is further formed on the periphery of the connecting head, and the third through-hole penetrates the connecting head and is connected with the plug-in channel; a fourth through-hole corresponding to the third through-hole is formed on the periphery of the rod-type balance, and the fourth through-hole penetrates the other end of the rod-type balance; a fastener is passed through the third through-hole and the fourth through-hole to fix the connecting head to the rod-type balance.

[0017] According to some embodiments of the present invention, the width of the plug-in channel gradually decreases in a direction away from the plug-in port; and the width of the end of the beam balance gradually decreases in an extending direction of the beam balance.

[0018] According to some embodiments of the present invention, the fairing includes a first curved surface and a second curved surface, and the two side edges of the first curved surface in the width direction are respectively a first edge and a second edge, and the two side edges of the second curved surface in the width direction are respectively a third edge and a fourth edge, the first edge is connected to the third edge, and the second edge is connected to the fourth edge, and at least a portion of the first curved surface and at least a portion of the second curved surface are bent in directions away from each other so that the first curved surface and at least a portion of the second curved surface are separated and define the installation channel.

[0019] According to some embodiments of the present invention, at least part of the outer surface of the support rod is configured as a third curved surface and a fourth curved surface, and at least part of the third curved surface and at least part of the fourth curved surface are bent in directions away from each other.

[0020] According to some embodiments of the present invention, at least a portion of the support rods gradually decrease in width in a direction away from the support.

[0021] According to some embodiments of the present invention, a movable channel is formed on the support, the movable channel extends in the thickness direction of the platform, and one end of the support rod is movably matched with the movable channel.

[0022] The following briefly describes a testing method for a wheel testing device according to another embodiment of the present invention.

[0023] The testing method for a wheel testing device according to the present invention is applicable to the wheel testing device described in any one of the above-mentioned embodiments. The wheel testing device is arranged in a wind field and has a data processing center. The testing method for the wheel testing device comprises: S1, starting the driving component to drive the wheel to rotate to a first preset speed at a first preset wind speed, and collecting data of the first measuring part and the second measuring part in this state; S2, the data processing center converts the data of the first measuring part and the second measuring part into digital signals, and calculates the output wheel force through a corresponding calculation formula.

[0024] According to some embodiments of the present invention, before "S1, start the driving component to drive the wheel to rotate to a second preset speed at a first preset wind speed, and collect data from the first measuring unit and the second measuring unit in this state", it also includes: S01, start the driving component to drive the wheel to rotate at the second preset speed for a first preset time; S02, turn off the driving component, and collect data from the first measuring unit and the second measuring unit when the wheel is stationary.

[0025] To sum up, the wheel testing device according to the present invention is provided with a supporting component and a driving component, which can isolate the aerodynamic force of the wheel from the forces of other structures of the wheel testing device, reduce interference with the wheel test, improve the accuracy of the wheel test results, and improve the test accuracy.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic diagram of the overall structure of a wheel testing device according to an embodiment of the present invention; Figure 2 is a structural schematic diagram of a wheel testing device according to an embodiment of the present invention; Figure 3is a partial structural cross-sectional view of a support rod and a first measuring part when they are matched according to an embodiment of the present invention; Figure 4 is a partial structural diagram of a support and a support rod according to an embodiment of the present invention; Figure 5 is an exploded view of a first measuring portion according to an embodiment of the present invention; Figure 6 is a structural diagram of a fairing according to an embodiment of the present invention; Figure 7 yes Figure 6 A cross-sectional view of the structure; Figure 8 is a structural cross-sectional view of a free end of a support rod according to an embodiment of the present invention; Fig. 9 is a structural cross-sectional view of a connector according to an embodiment of the present invention; Fig.10 is a structural cross-sectional view of a beam balance according to an embodiment of the present invention; Fig.11 is a force analysis diagram of a wheel testing device according to an embodiment of the present invention; Fig.12 yes Fig.11 Another view of the stress analysis diagram of the structure; Fig.13 is a flow chart of a testing method for a wheel testing device according to an embodiment of the present invention; Fig.14 is a flow chart of a testing method for a wheel testing device according to an embodiment of the present invention.

[0028] Reference numerals: 1. Wheel testing device; 2. Wheel; 10. platform; 11. measuring surface; 11a. measuring port; 20. Support member; 21. Support; 21a. Moving channel; 22, support rod; 221, plug-in protrusion; 221a, plug-in interface; 221b, plug-in channel; 221c, first through-hole; 23, first measuring part; 231, connecting head; 2311, Haba head; 231a, third through-hole; 232, measuring rod; 2321, fairing; 23211, first arcuate surface; 23212, second arcuate surface; 2321a, installation channel; 2321b, first open port; 2321c, second open port; 2322, beam balance; 2322a, second through-hole; 2322b, fourth through-hole; 30. Driving component; 31. Base; 32. Driving member. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the related art, the wind resistance caused by the wheels accounts for a large proportion of the vehicle's wind resistance, and the aerodynamic characteristics of the wheels directly affect the wind resistance level of the entire vehicle. During the wheel selection process, the wheel's wind resistance needs to be tested using a wheel testing device. In the prior art, other structures are provided between the bracket supporting the wheel and the force measuring device of the wheel testing device. The wheel testing device itself has a complex structure, which greatly interferes with the wheel test, and the wheel test results are inaccurate. In addition, the wheel testing device has limited test items, making it difficult to test the lift and lateral force of the wheel in contact with the contact strip. The test results are one-sided and the test accuracy is low.

[0035] Reference below Figure 1-Figure 10 A wheel testing device 1 according to an embodiment of the present invention is described.

[0036] The wheel testing device 1 according to the present invention comprises: a platform 10, a supporting component 20 and a driving component 30, wherein the platform 10 has a measuring surface 11; the supporting component 20 is arranged on the platform 10 and is provided with a first measuring part 23, the first measuring part 23 is located on the measuring surface 11 and is connected to the wheel 2, and the first measuring part 23 is used to measure the force F1 of the wheel 2; at least a part of the driving component 30 is located on the measuring surface 11 and is used to drive the wheel 2 to move, and a second measuring part is provided on the driving component 30 to measure the force F2 of the wheel 2.

[0037] Here, the support component 20 and the driving component 30 can be installed on the platform 10 or at other locations. The setting positions of the support component 20 and the driving component 30 do not need to be limited. While ensuring that the first measuring part 23 can extend to the measuring surface 11 to measure the force on the wheel 2, it is sufficient to ensure that the second measuring part can also detect the force of the wheel 2 on the part of the driving component 30 located on the measuring surface 11.

[0038] The supporting component 20 is used to assemble the wheel 2, and the driving component 30 is used to drive the wheel 2 to rotate. When the wheel testing device 1 is working, the wheel 2 is located on the measuring surface 11 and is always in contact with the first measuring part 23, so that the first measuring part 23 can measure the force F1 of the wheel 2. When the driving component 30 is working, the wheel 2 can be in contact with the part of the driving component 30 located on the measuring surface 11, so that the second measuring part can measure the force F2 of the wheel 2. By providing the supporting component 20 and the driving component 30, the wheel 2 can be isolated from other structures of the wheel testing device 1 to prevent the wheel 2 from being interfered by other structures during the test.

[0039] According to the present invention, the wheel testing device 1 is provided with a supporting component 20 and a driving component 30 to connect the wheel 2 between the supporting component 20 and the driving component 30. The forces of structures outside the supporting component 20 and the driving component 30, such as the platform 10, will not be introduced into the measurement data of the first measuring part 23 and the second measuring part. The mechanical force between the wheel 2 and the supporting component 20 and the driving component 30 becomes the internal force of the system of the wheel testing device 1, which will be offset in the coupling process of the first measuring part 23 and the second measuring part. The force exerted on the wheel 2 can be directly decoupled and measured by the first measuring part 23 and the second measuring part. When the rotation of the wheel 2 is realized by mechanical transmission, there is no need to indirectly deduct the mechanical force and the aerodynamic force exerted on the wheel testing device 1 exposed to the airflow, thereby reducing the interference to the test of the wheel 2, improving the accuracy of the test results of the wheel 2, and improving the test precision.

[0040] According to some embodiments of the present invention, the driving component 30 includes a base 31, a driving member 32 and a second measuring part, and at least a portion of the base 31 is spaced apart from the platform 10; the driving member 32 is arranged on the side of the base 31 facing the platform 10 and is located on the measuring surface 11, the driving member 32 is suitable for contacting the wheel 2 and driving the wheel 2 to move, and the driving member 32 is spaced apart from the platform 10; the second measuring part is arranged on the base 31 or the driving member 32 and is suitable for measuring the force F2' applied to the driving member 32, wherein F2' is equal to F2 in magnitude and opposite in direction.

[0041] Here, there is no connection between the driving component 30 and the platform 10 to avoid interference of the data obtained by the second measuring part by the platform 10. In the driving component 30, the driving member 32 is in contact with the wheel 2 and drives the wheel 2 to rotate. The wheel 2 is only in contact with the driving member 32. Therefore, the second measuring part measures the force F2' of the driving member 32, and the force F2 of the wheel 2 can be obtained.

[0042] Furthermore, the second measuring part can be arranged on the base 31 or the driving member 32. In some embodiments, the base 31 is configured as a balance structure, and the base 31 can serve as the second measuring part and be used to measure the force F2' of the driving member 32.

[0043] In some embodiments, the driving member 32 may be a driving wheel, a driving belt, or the like.

[0044] According to some embodiments of the present invention, the platform 10 is provided with a measuring port 11a in the thickness direction, a measuring surface 11 is formed on one side of the platform 10 in the thickness direction, and the base 31 is located on the other side of the platform 10 in the thickness direction; the projection of the driving member 32 in the thickness direction of the platform 10 is located within the projection of the measuring port 11a in the thickness direction of the platform 10, and the driving member 32 is spaced apart from the edge of the measuring port 11a. Here, the driving member 32 extends to the measuring surface 11 through the measuring port 11a, and the edge of the driving member 32 and the measuring port 11a are spaced apart to reduce the interference of the platform 10 and other structures on the driving member 32, thereby reducing the interference with the measurement result of the second measuring part. At the same time, the wheel 2 is located on one side of the platform 10 in the thickness direction, and the base 31 of the driving member 30 is located on the other side of the platform 10 in the thickness direction, which can also reduce the interference of the base 31 on the driving member 32, improve the accuracy of the test result of the wheel 2, and improve the test accuracy.

[0045] According to some embodiments of the present invention, the driving member 32 is constructed as a driving belt, which has a driving surface suitable for contacting the wheel 2, and the driving surface is flush with the measuring surface 11. The driving belt contacts the wheel 2 and drives the wheel 2 to move. At this time, the wheel 2 can rotate on the plane where the measuring surface 11 is located, which facilitates the measurement operation.

[0046] According to some embodiments of the present invention, the supporting component 20 includes a support 21, a support rod 22 and a first measuring portion 23, the support 21 is protrudingly arranged on the measuring surface 11; one end of the support rod 22 is connected to the support 21, and the other end of the support rod 22 extends in a direction away from the support 21, and the support rod 22 is parallel to the measuring surface 11; one end of the first measuring portion 23 is connected to the other end of the support rod 22, and the other end of the first measuring portion 23 is rotatably connected to the wheel 2, and the first measuring portion 23 is spaced apart from the platform 10.

[0047] Here, the support 21 is connected to the platform 10. In order to prevent the first measuring part 23 from being affected by the platform 10 during the test of the wheel 2, a support rod 22 is set between the first measuring part 23 and the support 21 to increase the distance between the first measuring part 23 and the support 21, so that the support 21 can be as far away from the wheel 2 as possible, reducing the interference of structures such as the support 21 and the platform 10 in the test process of the wheel 2, improving the accuracy of the test results of the wheel 2, and improving the test accuracy.

[0048] According to some embodiments of the present invention, the first measuring part 23 includes a connector 231 and a measuring rod 232, wherein the connector 231 is rotatably connected to the wheel 2; one end of the measuring rod 232 is connected to the other end of the support rod 22, and the other end of the measuring rod 232 is connected to the connector 231, and the measuring rod 232 is suitable for measuring the force F1 exerted on the wheel 2. Here, the measuring rod 232 can be used to measure the force F1' exerted on the wheel 2 on the connector 231, and F1 is the force exerted on the wheel 2 by the connector 231, that is, F1' and F1 are interaction forces of equal magnitude and opposite direction, so the measuring rod 232 can obtain the force F1 exerted on the wheel 2 by the connector 231 by measuring the force F1' exerted on the wheel 2 on the connector 231. In addition, the first measuring part 23 is composed of the connector 231 and the measuring rod 232, which can further increase the distance between the connector 231 and the support 21, so that the support 21 can be as far away from the wheel 2 as possible.

[0049] In some embodiments, a haba head 2311 is provided on the connecting head 231 , and the haba head 2311 is connected to the wheel 2 and rotatably connected to the connecting head 231 .

[0050] According to some embodiments of the present invention, the measuring rod 232 includes a fairing 2321 and a rod-type balance 2322, an installation channel 2321a is formed inside the fairing 2321, both ends of the fairing 2321 are open and respectively form a first open opening 2321b and a second open opening 2321c, the first open opening 2321b is connected to the other end of the support rod 22; the rod-type balance 2322 is penetrated through the installation channel 2321a and is spaced apart from the inner wall surface of the installation channel 2321a, one end of the rod-type balance 2322 extends out of the installation channel 2321a from the first open opening 2321b and is connected to the other end of the support rod 22, the other end of the rod-type balance 2322 extends out of the installation channel 2321a from the second open opening 2321c and is connected to the connector 231, and the rod-type balance 2322 is suitable for measuring the force F1 exerted on the wheel 2.

[0051] Specifically, the rod balance 2322 is arranged inside the fairing 2321, and the fairing 2321 is used to prevent the external airflow from directly blowing the rod balance 2322, thereby reducing the interference of the external airflow on the rod balance 2322. In addition, the rod balance 2322 is spaced apart from the inner wall surface of the installation channel 2321a, that is, the rod balance 2322 does not contact the fairing 2321, which can prevent the force on the fairing 2321 from being transmitted to the rod balance 2322, thereby further reducing the interference on the rod balance 2322. One end of the rod balance 2322 is connected to the support rod 22, and the other end of the rod balance 2322 is connected to the connector 231, and part of the force received by the wheel 2 is transmitted to the rod balance 2322 through the connector 231.

[0052] According to some embodiments of the present invention, the other end of the support rod 22 is formed with a plug-in protrusion 221 suitable for being received in the first open port 2321b, and a plug-in interface 221a is formed on the plug-in protrusion 221; a plug-in channel 221b connected to the plug-in interface 221a is formed inside the support rod 22, and one end of the rod-type balance 2322 extends into the plug-in channel 221b through the plug-in interface 221a. Specifically, the support rod 22 and the fairing 2321 are plugged and matched through the plug-in protrusion 221 at the end of the support rod 22 and the first open port 2321b at the end of the fairing 2321, and the support rod 22 and the rod-type balance 2322 are plugged and matched through the plug-in interface 221a at the end of the support rod 22 and one end of the rod-type balance 2322. The plug-in matching form is simple and the disassembly and assembly operation is convenient.

[0053] According to some embodiments of the present invention, a first through-hole 221c is further formed on the periphery of the support rod 22, and the first through-hole 221c is arranged through the other end of the support rod 22 and is connected with the insertion channel 221b; a second through-hole 2322a corresponding to the first through-hole 221c is formed on the periphery of the rod-type balance 2322, and the second through-hole 2322a is arranged through one end of the rod-type balance 2322; fasteners are passed through the first through-hole 221c and the second through-hole 2322a to fix the support rod 22 and the rod-type balance 2322 to prevent the support rod 22 and the rod-type balance 2322 from relative rotation, thereby ensuring the working stability of the rod-type balance 2322.

[0054] In some embodiments, the width of the first through-hole 221c and the second through-hole 2322a gradually decreases in the extension direction to form a wedge-shaped structure. The fastener can also be a wedge-shaped structure. The fastener passes through the first through-hole 221c and the second through-hole 2322a respectively to lock the support rod 22 and the rod-type balance 2322; in other embodiments, the inner walls of the first through-hole 221c and the second through-hole 2322a are formed with internal threads, the fastener is formed with external threads, and the fastener is threadedly matched with the first through-hole 221c and the second through-hole 2322a.

[0055] According to some embodiments of the present invention, the connector 231 is formed with an insertion port 221a and a plug-in channel 221b communicating with the insertion port 221a, and the other end of the rod-type balance 2322 extends into the plug-in channel 221b through the insertion port 221a. Specifically, the second open port 2321c of the fairing 2321 is directly opposite to the connector 231, and the connector 231 and the rod-type balance 2322 are plug-fitted with each other through the insertion port 221a at the end of the connector 231 and the other end of the rod-type balance 2322. The plug-fitting form is simple and the disassembly and assembly operation is convenient.

[0056] According to some embodiments of the present invention, a third through-hole 231a is further formed on the periphery of the connector 231, and the third through-hole 231a penetrates the connector 231 and is connected to the plug-in channel 221b; a fourth through-hole 2322b corresponding to the third through-hole 231a is formed on the periphery of the rod-type balance 2322, and the fourth through-hole 2322b penetrates the other end of the rod-type balance 2322; fasteners are passed through the third through-hole 231a and the fourth through-hole 2322b to fix the connector 231 and the rod-type balance 2322 to prevent relative rotation between the connector 231 and the rod-type balance 2322, thereby ensuring the working stability of the rod-type balance 2322.

[0057] In some embodiments, the width of the third through-hole 231a and the fourth through-hole 2322b gradually decreases in the extension direction to form a wedge-shaped structure, and the fastener can also be a wedge-shaped structure. The fasteners are respectively passed through the third through-hole 231a and the fourth through-hole 2322b to lock the connecting head 231 and the rod-type balance 2322; in other embodiments, the inner walls of the third through-hole 231a and the fourth through-hole 2322b are formed with internal threads, and the fasteners are formed with external threads, and the fasteners are threadedly matched with the third through-hole 231a and the fourth through-hole 2322b.

[0058] According to some embodiments of the present invention, the width of the plugging channel 221b gradually decreases in the direction away from the plugging port 221a; the width of the end of the rod-type balance 2322 gradually decreases in the extending direction of the rod-type balance 2322. Specifically, during the process of the rod-type balance 2322 being matched with the plugging channel 221b, the size of the end of the rod-type balance 2322 is small, and the size of the plugging port 221a is large, so that the rod-type balance 2322 can be guided to extend into the plugging channel 221b to be matched with the plugging channel 221b, thereby facilitating the assembly operation of the rod-type balance 2322.

[0059] In some embodiments, two ends of the rod-type balance 2322 are respectively plugged into and matched with the plug-in interface 221 a on the support rod 22 and the plug-in interface 221 a on the connector 231 .

[0060] According to some embodiments of the present invention, the fairing 2321 includes a first curved surface 23211 and a second curved surface 23212, the two side edges of the first curved surface 23211 in the width direction are respectively a first edge and a second edge, the two side edges of the second curved surface 23212 in the width direction are respectively a third edge and a fourth edge, the first edge is connected to the third edge, the second edge is connected to the fourth edge, at least a portion of the first curved surface 23211 and at least a portion of the second curved surface 23212 are bent in a direction away from each other, so that the first curved surface 23211 and at least a portion of the second curved surface 23212 are spaced apart and define an installation channel 2321a. Here, in order to prevent external airflow from blowing onto the rod-type balance 2322, a fairing 2321 is provided outside the rod-type balance 2322, and the fairing 2321 is spaced apart from the rod-type balance 2322. At the same time, in order to prevent external airflow from affecting the fairing 2321, the shape of the fairing 2321 is designed to be streamlined to guide the direction of the airflow blowing toward the fairing 2321, thereby further reducing the interference of the fairing 2321 on the test results.

[0061] In some embodiments, in a cross section perpendicular to the axial direction of the fairing 2321 , the outer shape of the fairing 2321 is a symmetrical airfoil.

[0062] According to some embodiments of the present invention, at least part of the outer surface of the support rod 22 is configured as a third curved surface and a fourth curved surface, and at least part of the third curved surface and at least part of the fourth curved surface are bent in directions away from each other. Here, in order to further reduce the influence of the external airflow on the measurement result of the beam balance 2322, at least part of the outer surface of the support rod 22 can also be designed to be streamlined to guide the flow direction of the airflow blowing toward the support rod 22, thereby reducing the interference of the support rod 22 on the test result.

[0063] According to some embodiments of the present invention, at least part of the support rod 22 gradually decreases in width in the direction away from the support 21. Here, at least part of the support rod 22 adopts a variable cross-section design, the cross-section of the support rod 22 close to the support 21 adopts a large chord length, and the cross-section of the support rod 22 close to the rod balance 2322 adopts a small chord length, that is, the support rod 22 becomes thinner from the base 31 end to the end, so as to increase the rigidity of the support rod 22 while reducing the weight of the support rod 22.

[0064] According to some embodiments of the present invention, a moving channel 21a is formed on the support 21, and the moving channel 21a extends in the thickness direction of the platform 10. One end of the support rod 22 is movably matched with the moving channel 21a. Here, the moving channel 21a allows the support rod 22 to move along the support 21 toward or away from the platform 10, so as to adapt to wheels 2 of different diameters. In some embodiments, the extension size of the moving channel 21a satisfies that the support rod 22 can move along the support 21 toward or away from the platform 10 by ±50 mm.

[0065] In some embodiments, the contact force between the wheel 2 and the driving member 32 can also be controlled by fine-tuning the position of the support rod 22 relative to the moving channel 21a. The size of the contact force can be determined by real-time observation of the vertical component of the rod balance 2322 to ensure that there is no slippage between the wheel 2 and the driving member 32. At the same time, no excessive force is transmitted to the support rod 22 to avoid excessive deflection of the support rod 22.

[0066] In some embodiments, the support rod 22 is subjected to a force of 60N in a stationary state, which can ensure that there is no slipping between the wheel 2 and the driving member 32 .

[0067] In some embodiments, the support 21 is fixed to the platform 10 by screws.

[0068] In some embodiments, the support rod 22 is connected to the support 21 by bolts, and the connecting end surface of the support rod 22 has a through hole for connection with the bolt.

[0069] In some embodiments, the moving channel 21 a is 12 mm wide and 330 mm long, and the support rod 22 passes through the moving channel 21 a via connecting bolts to be movably connected to the support 21 .

[0070] The following briefly describes the testing method for the wheel testing device according to the present invention.

[0071] like Fig.13 As shown, the testing method for a wheel testing device according to the present invention is applicable to the wheel testing device in any one of the above embodiments, the wheel testing device is arranged in a wind farm and has a data processing center, and the testing method for the wheel testing device includes: S1. Start the driving component to drive the wheel to rotate to a first preset speed under a first preset wind speed, and collect data of the first measuring unit and the second measuring unit in this state; S2. The data processing center converts the data of the first measuring part and the second measuring part into digital signals, and calculates the output wheel force through a corresponding calculation formula.

[0072] Here, after starting the driving component, the wind speed in the wind field can be adjusted so that the wheel speed and wind speed reach the preset values. At this time, the first measuring part and the second measuring part can be triggered to collect data through the synchronization signal trigger, and the electrical signals of the first measuring part and the second measuring part can be converted into digital signals through the data processor, and the final result can be output according to the corresponding calculation formula.

[0073] In some embodiments, the first preset wind speed and the first preset speed can be preset in multiple quantities according to actual needs, and the speed of the driving component and the wind speed of the air outlet component are adjusted. At each speed, the data collection time is not less than 30 seconds. Repeat the above steps until all test speeds are completed.

[0074] The test method for the wheel test device can be used to measure the lift and lateral force of the rotating wheel in contact with the drive belt. The method can also calculate the wheel speed and rotation radius based on the collected data without the need for other additional measuring equipment, such as a stroboscope.

[0075] like Fig.11 , Fig.12 As shown, during the test, the forces of the second measuring part in the x, y, and z directions are , , The forces of the beam balance in the x, y, and z directions are , , .

[0076] Wheel drag, lift and lateral force can be measured as follows: Taking the force on the wheel in the x direction (i.e. the direction of resistance) as an example, the wheel is subjected to three forces in the x direction, namely the force applied by the drive belt , the force exerted by the support rod , and pneumatic power .

[0077] According to the relationship between force and reaction force, the force on the second measuring part is: ; The force on the beam balance is: ; According to the balance relationship of wheel force: ; Right now: ; The aerodynamic forces in other directions are similar, namely: , (G is the weight of the wheel).

[0078] The wheel speed can be measured in the following way: the wheel speed can be obtained by performing fast Fourier transform (FFT) on the x-direction force signal of the beam balance, and the obtained main frequency is the wheel speed f.

[0079] The wheel rolling radius can be measured by: , and the wheel speed f, the rolling radius of the wheel can be calculated: .

[0080] The ventilation torque can be measured as follows: With the wheel axis of rotation as the center, the wheel is subjected to three torques in the opposite direction of rotation, namely, the ventilation torque , rolling resistance moment , bearing friction torque , the balancing torque is the wheel drive belt tangential force The torque generated .

[0081] in, , .

[0082] Assuming that the ventilation torque is proportional to the square of the speed, the rolling resistance torque and the bearing friction torque do not change with the speed, that is, the ventilation torque at high speed (referring to a speed of not less than 60km / h) ) is much larger than the ventilation torque at low speed (referring to a speed of no more than 20km / h) ). Before each test, measure a set of ventilation torques at low speeds as a benchmark, and then measure the ventilation torques at other high speeds. ; Right now: (where subscripts l and h represent parameters at low speed and high speed respectively).

[0083] According to some embodiments of the present invention, Fig.14 As shown, before “S1, starting the driving component to drive the wheel to rotate to a second preset speed at a first preset wind speed, and collecting data of the first measuring unit and the second measuring unit in this state”, it also includes: S01, starting the driving component to drive the wheel to rotate at a second preset speed for a first preset time; S02: Turn off the driving component and collect data from the first measuring unit and the second measuring unit when the wheel is stationary.

[0084] Here, the driving component is started, and the driving wheel is driven to run continuously for 20 minutes at 120 km / h to preheat the system. After preheating, the driving component is stopped, and zero point acquisition is performed on the first measuring part and the second measuring part when the wheel is stationary.

[0085] When the wheel test device model is initially installed, the support can be installed, and then the support rod can be connected to the haba head, and then the wheel can be connected. Finally, the support rod height is adjusted according to the wheel diameter and initially fixed to the support. During the installation process, ensure that the coordinate system of the first measuring part and the second measuring part is consistent with the coordinate system of the platform, that is, the x, y, and z directions are the same.

[0086] Then the electrical signal line is connected, the electrical signal of the first measuring part and the electrical signal of the second measuring part are synchronously collected by a synchronous signal trigger, and the collected electrical signals are converted into digital signals and output by a data processor.

[0087] When starting the test, you can fine-tune the height of the support rod while monitoring the reading of the beam balance in real time. When the reading is about 60 N, initially fix the support rod. Then fine-tune the horizontality of the support rod to ensure that the pitch angle of the support rod is 0 (the reading of the beam balance in the x and y directions does not exceed 0.5 N).

[0088] Finally, a static weight loading test is carried out to check the accuracy of the beam balance measurement, and the deviation of each component is ≤0.5N.

[0089] The wheel test device designed according to the present invention is an isolated wheel dual balance multi-dimensional force test system, which realizes the direct decoupling measurement of the aerodynamic force of the isolated wheel, with an error of <0.5N, and corrects the error of the mechanical force. It can also test and measure the lift and ventilation resistance of a single wheel, and obtain the test data of the aerodynamic characteristics of the wheel under a large Reynolds number. The relevant data obtained by the test system, such as the wheel aerodynamic data and the spatial flow field distribution, improve the reliability of the simulation of the complex flow field of the wheel, and enhance the ability to design low wind resistance wheels.

[0090] To sum up, the wheel testing device according to the present invention is provided with a supporting component and a driving component, which can isolate the aerodynamic force of the wheel from the forces of other structures of the wheel testing device, reduce interference with the wheel test, improve the accuracy of the wheel test results, and improve the test accuracy.

[0091] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0092] While embodiments of the present invention have been shown and described above, changes, modifications, substitutions and variations may be made to the embodiments described above.

Claims

1. A wheel testing device, characterized in that: include: A platform (10), wherein the platform (10) has a measuring surface (11); a support component (20), the support component (20) being arranged on the platform (10) and being provided with a first measuring part (23), the first measuring part (23) being located on the measuring surface (11) and connected to the wheel (2), the first measuring part (23) being used to measure a force F1 applied to the wheel (2); A driving component (30), at least part of which is located on the measuring surface (11) and is used to drive the wheel (2) to move, and a second measuring part is provided on the driving component (30) to measure the force F2 applied to the wheel (2).

2. The wheel testing device according to claim 1, characterized in that: The driving component (30) comprises: A base (31), at least a portion of the base (31) being spaced apart from the platform (10); a driving member (32), the driving member (32) being arranged on a side of the base (31) facing the platform (10) and located on the measuring surface (11), the driving member (32) being suitable for contacting the wheel (2) and driving the wheel (2) to move, the driving member (32) being spaced apart from the platform (10); A second measuring part, the second measuring part is arranged on the base (31) or the driving member (32) and is suitable for measuring a force F2' applied to the driving member (32), wherein F2' is equal to F2 in magnitude and opposite in direction.

3. The wheel testing device according to claim 2, characterized in that: The platform (10) is provided with a measuring port (11a) penetrating in the thickness direction, the measuring surface (11) is formed on one side of the platform (10) in the thickness direction, and the base (31) is located on the other side of the platform (10) in the thickness direction; The projection of the driving member (32) in the thickness direction of the platform (10) is located within the projection of the measuring opening (11a) in the thickness direction of the platform (10), and the driving member (32) is spaced apart from an edge of the measuring opening (11a).

4. The wheel testing device according to claim 3, characterized in that: The drive member (32) is configured as a drive belt, the drive belt having a drive surface suitable for contacting the wheel (2), the drive surface being flush with the measuring surface (11).

5. The wheel testing device according to claim 1, characterized in that: The supporting component (20) comprises: A support (21), the support (21) being protrudingly disposed on the measuring surface (11); A support rod (22), one end of the support rod (22) being connected to the support seat (21), the other end of the support rod (22) extending in a direction away from the support seat (21), and the support rod (22) being parallel to the measuring surface (11); A first measuring part (23), one end of the first measuring part (23) is connected to the other end of the support rod (22), the other end of the first measuring part (23) is rotatably connected to the wheel (2), and the first measuring part (23) is spaced apart from the platform (10).

6. The wheel testing device according to claim 5, characterized in that: The first measuring unit (23) comprises: A connecting head (231), the connecting head (231) being rotatably connected to the wheel (2); A measuring rod (232), one end of the measuring rod (232) being connected to the other end of the support rod (22), the other end of the measuring rod (232) being connected to the connecting head (231), and the measuring rod (232) being suitable for measuring a force F1 applied to the wheel (2).

7. The wheel testing device according to claim 6, characterized in that: The measuring rod (232) comprises: A fairing (2321), wherein a mounting channel (2321a) is formed inside the fairing (2321), and both ends of the fairing (2321) are open and respectively form a first open opening (2321b) and a second open opening (2321c), and the first open opening (2321b) is connected to the other end of the support rod (22); A rod-type balance (2322), the rod-type balance (2322) being inserted into the mounting channel (2321a) and spaced apart from the inner wall surface of the mounting channel (2321a), one end of the rod-type balance (2322) extending out of the mounting channel (2321a) through the first opening (2321b) and connected to the other end of the support rod (22), the other end of the rod-type balance (2322) extending out of the mounting channel (2321a) through the second opening (2321c) and connected to the connector (231), the rod-type balance (2322) being suitable for measuring a force F1 applied to the wheel (2).

8. The wheel testing device according to claim 7, characterized in that: The other end of the support rod (22) is formed with a plug-in protrusion (221) suitable for being received in the first open opening (2321b), and the plug-in protrusion (221) is formed with a plug-in interface (221a); A plug-in channel (221b) communicating with the plug-in interface (221a) is formed inside the support rod (22), and one end of the rod-type balance (2322) extends into the plug-in channel (221b) through the plug-in interface (221a).

9. The wheel testing device according to claim 8, characterized in that: A first through-hole (221c) is also formed on the outer periphery of the support rod (22), and the first through-hole (221c) is arranged through the other end of the support rod (22) and is in communication with the insertion channel (221b); The outer periphery of the rod-type balance (2322) is formed with a second through-hole (2322a) corresponding to the first through-hole (221c), and the second through-hole (2322a) is arranged to penetrate one end of the rod-type balance (2322); The fastener passes through the first through-hole (221c) and the second through-hole (2322a) to fixedly connect the support rod (22) and the rod-type balance (2322).

10. The wheel testing device according to claim 7, characterized in that: The connector (231) is formed with a plug interface (221a) and a plug channel (221b) communicating with the plug interface (221a); ​​the other end of the rod-type balance (2322) extends into the plug channel (221b) through the plug interface (221a).

11. The wheel testing device according to claim 10, characterized in that: A third through-hole (231a) is also formed on the outer periphery of the connecting head (231), and the third through-hole (231a) is arranged through the connecting head (231) and is in communication with the plug-in channel (221b); A fourth through-hole (2322b) corresponding to the third through-hole (231a) is formed on the outer periphery of the rod-type balance (2322), and the fourth through-hole (2322b) is arranged to penetrate the other end of the rod-type balance (2322); A fastener is provided through the third through-hole (231a) and the fourth through-hole (2322b) to fixedly connect the connecting head (231) and the rod-type balance (2322).

12. The wheel testing device according to claim 8 or 10, characterized in that: The width of the plug-in channel (221b) gradually decreases in a direction away from the plug-in port (221a); ​​and in the extension direction of the rod-type balance (2322), the width of the end of the rod-type balance (2322) gradually decreases.

13. The wheel testing device according to claim 7, characterized in that: The fairing (2321) comprises a first curved surface (23211) and a second curved surface (23212), the two side edges of the first curved surface (23211) in the width direction are respectively a first edge and a second edge, the two side edges of the second curved surface (23212) in the width direction are respectively a third edge and a fourth edge, the first edge is connected to the third edge, the second edge is connected to the fourth edge, at least a portion of the first curved surface (23211) and at least a portion of the second curved surface (23212) are bent in a direction away from each other, so that the first curved surface (23211) and at least a portion of the second curved surface (23212) are spaced apart and define the installation channel (2321a).

14. The wheel testing device according to claim 5, characterized in that: At least part of the outer surface of the support rod (22) is configured as a third arcuate surface and a fourth arcuate surface, and at least part of the third arcuate surface and at least part of the fourth arcuate surface are bent in directions away from each other.

15. The wheel testing device according to claim 5, characterized in that: At least part of the support rods (22) have a width that gradually decreases in a direction away from the support seat (21).

16. The wheel testing device according to claim 5, characterized in that: A movable channel (21a) is formed on the support (21), the movable channel (21a) extending in the thickness direction of the platform (10), and one end of the support rod (22) is movably matched with the movable channel (21a).

17. A testing method for a wheel testing device, characterized in that: The wheel testing device is constructed as a wheel testing device according to any one of claims 1 to 16, the wheel testing device is arranged in a wind farm and has a data processing center, and the testing method for the wheel testing device comprises: S1, starting the driving component to drive the wheel to rotate to a first preset speed under a first preset wind speed, and collecting data of the first measuring unit and the second measuring unit in this state; S2. The data processing center converts the data of the first measuring part and the second measuring part into digital signals, and calculates the output wheel force through a corresponding calculation formula.

18. The testing method for a wheel testing device according to claim 17, characterized in that: Before "S1, starting the driving component to drive the wheel to rotate to a second preset speed at a first preset wind speed, and collecting data of the first measuring unit and the second measuring unit in this state", it also includes: S01, starting the driving component to drive the wheel to rotate at a second preset speed for a first preset time; S02: Turn off the driving component and collect data from the first measuring unit and the second measuring unit when the wheel is stationary.

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