Spur gear split torque transmission uniform load testing device and uniform load testing method

Abstract

The application discloses a face gear split-torque transmission uniform load testing device and a uniform load testing method. The face gear split-torque transmission uniform load testing device comprises a first detection member, a second detection member and a key signal generator. The first detection member is connected with one tooth root part of the first face gear, and is used for generating a first face gear tooth root strain value sequence when any one of the cylindrical gears is engaged with the tooth root where the first detection member is located. The second detection member is connected with one tooth root part of the second face gear, and is used for generating a second face gear tooth root strain value sequence when any one of the cylindrical gears is engaged with the tooth root where the second detection member is located. The key signal generator is connected with any one of the cylindrical gears, and is used for identifying the first strain value sequence and the second strain value sequence. All the detection members and the key signal generator are electrically connected with a controller.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission technology, specifically to a load-sharing test device and method for face gear torque transmission. Background Technology

[0002] Face gear torque distribution transmission structures are mainly used in helicopter main gearboxes, replacing traditional bevel gear drives. This reduces the weight of the torque distribution transmission structure by 40%, and also offers advantages such as high overlap ratio, no axial force on the mating spur gears, and easy installation. Accurately evaluating the load-sharing performance of face gear transmission structures can provide theoretical guidance and basis for their design. Furthermore, the rapid development of face gear torque distribution transmission structure design and manufacturing technology can drive the upgrading of main gearboxes and the corresponding helicopters.

[0003] A static load-sharing test method for a face gear torsion transmission structure is provided. By applying torque to the input end and stopping the torque at the output end of the rotor of the torsion transmission, the static strain at the root of the face gear is measured. Based on the calibrated relationship between torque (power) and strain, the power ratios transmitted by the upper and lower gears in mesh with the input gear, output gear, and two idler gears are determined. This allows the magnitude and direction of the power flow transmitted by each gear in the dynamic load-sharing test piece of the face gear structure to be obtained, thereby evaluating the load-sharing performance of the face gear structure.

[0004] However, the above-mentioned static load sharing test method has high requirements for angle control accuracy during the torque application process at the input end and difficulty in controlling the torque-stopping accuracy at the rotor output end, resulting in large data errors in the load sharing test, thus failing to accurately evaluate the load sharing performance of the face gear structure. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is that the high accuracy requirement for angle control during the torque application process at the input end and the difficulty in controlling the torque-stopping accuracy at the rotor output end in the prior art result in large data errors in the load sharing test, thus making it impossible to accurately evaluate the load sharing performance of the face gear structure.

[0006] Therefore, the present invention provides a surface gear torque distribution transmission load sharing test device, comprising:

[0007] The face gear torque transmission structure includes a first face gear and a second face gear arranged opposite to each other, and a plurality of cylindrical gears arranged between the first face gear and the second face gear;

[0008] At least one first detection element is connected to one of the tooth root portions of the first face gear, for generating a sequence of tooth root strain values ​​of the first face gear when any of the cylindrical gears meshes with the tooth root where the first detection element is located.

[0009] At least one second detection member, which is connected with one of the tooth root parts of the second face gear, is used to generate a second face gear tooth root strain value sequence when any one of the cylindrical gears meshes with the tooth root where the second detection member is located;

[0010] A keying signal generator, which is connected with any one of the cylindrical gears, is used to identify the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence;

[0011] All detection members and the keying signal generator are electrically connected with a controller, which is used to collect the first face gear tooth root strain value sequence, the second face gear tooth root strain value sequence and the value generated by the keying signal generator.

[0012] Optionally, the face gear split-torque transmission uniform load testing device described above further comprises a slip ring power supply, which is in sliding connection with the cylindrical gear where the keying signal generator is located, and is electrically connected with the keying signal generator.

[0013] Optionally, the face gear split-torque transmission uniform load testing device described above further comprises:

[0014] A first signal generator, which is arranged on the first face gear and is connected with all the first detection members on the first face gear;

[0015] A second signal generator, which is arranged on the second face gear and is connected with all the second detection members on the second face gear;

[0016] A first transmitting coil, which is connected with the first signal generator;

[0017] A second transmitting coil, which is connected with the second signal generator.

[0018] Optionally, the face gear split-torque transmission uniform load testing device described above further comprises:

[0019] A housing, in which the face gear structure is arranged;

[0020] A receiving coil, which is fixed on the inner wall of the housing and is electrically connected with the controller.

[0021] Optionally, the face gear split-torque transmission uniform load testing device described above further comprises:

[0022] The plurality of cylindrical gears comprises two input cylindrical gears, two idlers and one output cylindrical gear;

[0023] At least one third detection member is attached to any tooth root of one of the cylindrical gears, and is used to generate a sequence of tooth root strain values of the cylindrical gear when the first face gear or the second face gear engages with the tooth root where the third detection member is located.

[0024] The present application provides a load sharing test method, which is suitable for the face gear load sharing test device described above, and comprises the following steps:

[0025] Obtaining the sequence of face gear tooth root strain values generated by each first detection member and each second detection member during the rotation of the face gear load sharing test device;

[0026] Dividing the sequence of face gear tooth root strain values into a plurality of first face gear tooth root strain value sequences and a plurality of second face gear tooth root strain value sequences, any first face gear tooth root strain value sequence comprises a plurality of first face gear tooth root strain values, and one sequence of first face gear tooth root strain values is generated by one-time engagement between one of the cylindrical gears and the tooth root where any first detection member is located, any second face gear tooth root strain value sequence comprises a plurality of second face gear tooth root strain values, and one sequence of second face gear tooth root strain values is generated by one-time engagement between one of the cylindrical gears and the tooth root where any second detection member is located;

[0027] According to the rotation direction of the first face gear and the phase difference between each first face gear tooth root strain value sequence, the cylindrical gear that engages with the tooth root where the first detection member is located when each first face gear tooth root strain value sequence is generated is determined respectively;

[0028] According to the rotation direction of the second face gear and the phase difference between each second face gear tooth root strain value sequence, the cylindrical gear that engages with the tooth root where the second detection member is located when each second face gear tooth root strain value sequence is generated is determined respectively;

[0029] According to the corresponding first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence of each cylindrical gear, the load sharing value at each cylindrical gear is determined.

[0030] Optionally, in the load sharing test method provided by the application, when the face gear split-torque transmission load sharing test device has a plurality of first detection members and a plurality of second detection members, each cylindrical gear corresponds to a plurality of first face gear tooth root strain value sequences and a plurality of second face gear tooth root strain value sequences, and the step of determining the load sharing value at each cylindrical gear according to the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence corresponding to each cylindrical gear comprises:

[0031] normalizing the maximum strain value in each first face gear tooth root strain value sequence corresponding to each cylindrical gear to obtain the normalized first tooth root strain value corresponding to each cylindrical gear;

[0032] normalizing the maximum strain value in each second face gear tooth root strain value sequence corresponding to each cylindrical gear to obtain the normalized second tooth root strain value corresponding to each cylindrical gear;

[0033] determining the load sharing value at each cylindrical gear according to the normalized first tooth root strain value and the normalized second tooth root strain value corresponding to each cylindrical gear.

[0034] Optionally, in the load sharing test method provided by the application,

[0035] dividing the face gear tooth root strain value sequence into a first face gear tooth root strain value sequence and a second face gear tooth root strain value sequence according to the value generated by the key phase signal generator when the face gear tooth root strain value sequence is generated.

[0036] The technical solution provided by the application has the following advantages:

[0037] 1. The face gear split torque transmission uniform load testing device provided by the present application, the face gear split torque transmission structure comprising a first face gear and a second face gear arranged oppositely, and a plurality of cylindrical gears arranged between the first face gear and the second face gear, comprising at least one first detection member, at least one second detection member, and a key signal generator, the first detection member being connected with one tooth root part of the first face gear, for generating a first face gear tooth root strain value sequence when any one of the cylindrical gears meshes with the tooth root where the first detection member is located; the second detection member being connected with one tooth root part of the second face gear, for generating a second face gear tooth root strain value sequence when any one of the cylindrical gears meshes with the tooth root where the second detection member is located, the key signal generator being connected with any one of the cylindrical gears, the key signal generator being used for identifying the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence; all the detection members and the key signal generator being electrically connected with a controller, the controller being used for collecting the first face gear tooth root strain value sequence, the second face gear tooth root strain value sequence, and the value generated by the key signal generator.

[0038] The face gear split torque transmission uniform load testing device of this structure sets the first detection member on the first face gear and the second detection member on the second face gear, and then divides the face gear tooth root strain value sequence generated by the first detection member and the second detection member into the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence through the key signal generator, and through data processing and calculation of the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence, the uniform load value at each cylindrical gear can be obtained. Without controlling the input and output of the face gear split torque transmission structure, the uniform load value is directly obtained through the first detection member and the second detection member, and the accuracy of testing the uniform load performance is improved.

[0039] 2. The load sharing test method provided by the application can obtain the face gear tooth root strain value sequence of each face gear through each first detection piece and each second detection piece, divide the face gear tooth root strain value sequence into a plurality of first face gear tooth root strain value sequences and a plurality of second face gear tooth root strain value sequences, one first face gear tooth root strain value sequence is generated in the meshing process of one cylindrical gear and the tooth root where any one first detection piece is located, one second face gear tooth root strain value sequence is generated in the meshing process of one cylindrical gear and the tooth root where any one second detection piece is located, the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence corresponding to each cylindrical gear can reflect the load of each cylindrical gear, and the load sharing value of each cylindrical gear can be directly determined through the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence corresponding to each cylindrical gear; therefore, the cylindrical gears do not need to be controlled, and the power loss in the face gear split torque transmission process does not need to be considered, thereby improving the accuracy of the face gear split torque transmission load sharing performance calculation.

[0040] 3. The load sharing test method provided by the application can normalize the first face gear tooth root maximum strain value obtained by each first detection piece, normalize the second face gear tooth root maximum strain value obtained by each second detection piece, and then calculate the face gear load sharing performance through the normalized first tooth root strain value and the normalized second tooth root strain value; the data obtained through the normalization process can reduce the influence of human factors. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0042] Figure 1 The structural schematic diagram of the face gear split torque transmission structure provided by the application;

[0043] Figure 2 The schematic diagram of the face gear split torque transmission load sharing test device in the embodiment of the application;

[0044] Figure 3 The flowchart of one specific example of the load sharing test method in the embodiment of the application.

[0045] Explanation of reference signs:

[0046] 11, first face gear; 12, second face gear; 13, first input cylindrical gear; 14, second input cylindrical gear; 15, first idler gear; 16, second idler gear; 17, output cylindrical gear. DETAILED DESCRIPTION

[0047] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0048] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to has a particular orientation, is constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0051] Example 1

[0052] The present embodiment provides a face gear split-torque transmission uniform load test device, which comprises Figure 1As shown, the face gear split torque transmission device includes a face gear split torque transmission structure, at least one first detection element, at least one second detection element, and a keying signal generator. The face gear split torque transmission structure includes a first face gear 11 and a second face gear 12 arranged oppositely, and a plurality of cylindrical gears arranged between the first face gear 11 and the second face gear 12. The first detection element is connected to one of the tooth root portions of the first face gear 11, and is configured to generate a first face gear tooth root strain value sequence when any one of the cylindrical gears meshes with the tooth root where the first detection element is located. The second detection element is connected to one of the tooth root portions of the second face gear 12, and is configured to generate a second face gear tooth root strain value sequence when any one of the cylindrical gears meshes with the tooth root where the second detection element is located. The keying signal generator is connected to any one of the cylindrical gears, and is configured to identify the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence. All the detection elements and the keying signal generator are electrically connected to a controller, and the controller is configured to collect the first face gear tooth root strain value sequence, the second face gear tooth root strain value sequence, and the value generated by the keying signal generator.

[0053] The face gear split torque transmission device provided by the embodiment sets the first detection element on the first face gear 11 and the second detection element on the second face gear 12, and then separates the strain value sequences generated by the first detection element and the second detection element into the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence through the keying signal generator. Through data processing and calculation of the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence, the load sharing values at the cylindrical gears can be obtained. The input and output of the face gear split torque transmission device do not need to be controlled, but the load sharing values are directly obtained through the first detection element and the second detection element, thereby improving the accuracy of testing the load sharing performance.

[0054] As shown in the Figure 1 The face gear split torque transmission device provided by the embodiment does not limit the number of cylindrical gears. In order to meet the actual situation, five cylindrical gears are arranged between the two face gears, which are a first input cylindrical gear 13, a second input cylindrical gear 14, a first idler gear 15, a second idler gear 16, and an output cylindrical gear 17. The tooth surfaces of the first face gear 11 and the second face gear 12 are opposite, and the center axes of the first face gear 11 and the second face gear 12 are collinear. The first input cylindrical gear 13, the second input cylindrical gear 14, the first idler gear 15, the second idler gear 16, and the output cylindrical gear 17 are arranged between the first face gear 11 and the second face gear 12, and the first input cylindrical gear 13, the second input cylindrical gear 14, the first idler gear 15, the second idler gear 16, and the output cylindrical gear 17 are respectively meshed with the first face gear 11 and the second face gear 12.

[0055] AsFigure 1 As shown, the face gear torque transmission load-sharing test device provided in this embodiment uses strain gauges as both the first and second detection elements. Different strain signals are generated when the strain gauges are under tension and compression. A key phase signal generator is used to generate electrical signals. This embodiment does not specifically limit the number of the first and second detection elements; to conform to reality, this embodiment uses five first detection elements and five second detection elements. Three of the first detection elements are respectively attached to the three adjacent tooth roots of the first face gear 11, and the other two are respectively attached to the two side walls of the middle tooth root of the aforementioned three adjacent tooth roots. When any cylindrical gear meshes with the tooth root in the middle of the three adjacent tooth roots, due to the presence of three first detection elements, three strain value sequences of the first face gear tooth roots can be generated in one meshing process. The other two... Each tooth root with a first detection element generates a first gear tooth root strain value sequence during one meshing process. Three second detection elements are respectively attached to three adjacent tooth roots of the second gear 12, and two other second detection elements are respectively attached to the two side walls of the middle tooth root of the three adjacent tooth roots. When any cylindrical gear meshes with the tooth root in the middle of the three adjacent tooth roots, due to the presence of three second detection elements, three second gear tooth root strain value sequences can be generated during one meshing process. The other two tooth roots with second detection elements each generate a second gear tooth root strain value sequence during one meshing process.

[0056] A key phase signal generator is mounted on the first idler gear 15. The key phase signal generator generates an electrical signal, which is then used to calibrate the strain value sequence at the root of the first gear. Specifically, when the key phase signal generator generates an electrical signal, it generates a strain value sequence at the root of the first gear 11. Alternatively, this electrical signal can be used to calibrate the strain value at the root of the second gear 12. Five first detection elements, five second detection elements, and the key phase signal generator are electrically connected to a controller. The controller is a load-sharing test display panel used to receive the strain value sequences at the root of the first gear generated by the five first detection elements, the strain value sequences at the root of the second gear generated by the five second detection elements, and the electrical signal generated by the key phase signal generator.

[0057] like Figure 1 As shown, the face gear torque transmission load sharing test device provided in this embodiment also includes a slip ring actuator. The slip ring actuator is sleeved on the rotating shaft of the first idler wheel 15, and the slip ring actuator is connected to the key phase signal generator through a wire. The slip ring actuator is a device that connects mechanical equipment and can rotate 360 ​​degrees without restriction to transmit current and signals. Since the key phase signal generator rotates with the first idler wheel 15, when it is necessary to transmit the electrical signal generated by the key phase signal generator to the controller, the slip ring actuator is used to transmit the electrical signal.

[0058] likeFigure 1 As shown, the face gear torque distribution load sharing test device provided in this embodiment also includes a first signal generator, a second signal generator, a first transmitting coil, a second transmitting coil, a housing, and a receiving coil. The face gear structure is disposed inside the housing, the receiving coil is fixed on the inner wall of the housing, and the receiving coil is connected to the controller via a wire. The first signal generator is fixed to the side of the first face gear 11 by welding or other means, that is, the first signal generator is fixed to the toothless side of the first face gear 11. The first signal generator is connected to five first detection elements respectively. The second signal generator is fixed to the side of the second face gear 12 by welding or other means, that is, the second signal generator is fixed to the toothless side of the second face gear 12. The first transmitting coil is fixed to the side of the first face gear 11 where the first signal generator is located by welding or other means, and the first transmitting coil is connected to the first signal generator via a wire. The second transmitting coil is fixed to the side of the second face gear 12 where the second signal generator is located by welding or other means, and the second transmitting coil is connected to the second signal generator via a wire. When each of the first detection elements generates a strain signal, the strain signal is transmitted to the first signal generator. The signal generator then emits the strain signal through the first transmitting coil, and the receiving coil receives the strain signal. When each of the second detection elements generates a strain signal, the strain signal is transmitted to the second signal generator. The signal generator then emits the strain signal through the second transmitting coil, and the receiving coil receives the strain signal.

[0059] like Figure 1 As shown, the face gear torque transmission load-sharing test device provided in this embodiment also includes a third detection element, which is also a strain gauge. This embodiment does not limit the number of third detection elements; to conform to reality, four third detection elements are set. These four third detection elements are respectively attached to the four adjacent tooth roots of the first idler gear 15. During one meshing process between the first face gear 11 and the tooth root of one of the third detection elements, a cylindrical gear tooth root strain value sequence is generated. Similarly, during one meshing process between the second face gear 12 and the tooth root of one of the third detection elements, a cylindrical gear tooth root strain value sequence is generated. A key phase signal generator is connected to each of the four third detection elements via wires to transmit the cylindrical gear tooth root strain value sequences generated by each third detection element back to the controller. That is, when each third detection element generates a strain signal, it transmits the strain signal to the key phase signal generator, and then the signal generator transmits each strain signal back to the controller via a slip ring actuator.

[0060] The working process of the face gear torque distribution load sharing test device provided in this embodiment is as follows:

[0061] First, open the first signal generator, the second signal generator and the key signal generator, then open the controller, then make the first input cylindrical gear 13 and the second input cylindrical gear 14 rotate, i.e. drive the first face gear 11 and the second face gear 12 to rotate, and the first face gear 11 and the second face gear 12 drive the first idler gear 15, the second idler gear 16 and the output cylindrical gear 17 to rotate. When 3 tooth roots with 5 first detection members are engaged with one of the cylindrical gears respectively, 5 first face gear tooth root strain value sequences are generated and transmitted to the controller through the first signal generator and the first transmitting coil by the receiving coil. When 3 tooth roots with 5 second detection members are engaged with one of the cylindrical gears respectively, 5 second face gear tooth root strain value sequences are generated and transmitted to the controller through the second signal generator and the second transmitting coil by the receiving coil. When 4 tooth roots with third detection members are engaged with the first face gear 11 respectively, 4 cylindrical gear tooth root strain values are generated and transmitted to the controller through the key signal generator and the slip ring power supply. Collect and record all the data transmitted by the first detection members, the second detection members and the third detection members during the rotation of the first face gear 11. After the first face gear 11 rotates one circle, the first input cylindrical gear and the second input cylindrical gear stop rotating.

[0062] Embodiment 2

[0063] The embodiment provides a load sharing test method, which adopts the face gear split-torque transmission load sharing test device in the embodiment 1, as shown in FIGS. 1-3, and further includes the following steps. Figure 2 and Figure 3 The embodiment provides a load sharing test method, which adopts the face gear split-torque transmission load sharing test device in the embodiment 1, as shown in FIGS. 1-3, and further includes the following steps.

[0064] Step S11: obtaining the strain value sequences generated by each first detection member and each second detection member during the rotation of the face gear split-torque transmission structure.

[0065] In an optional embodiment, all the face gear tooth root strain value sequences in the controller are recorded by the receiving coil, the strain value sequences include a plurality of first face gear tooth root strain value sequences and a plurality of second face gear tooth root strain value sequences, and all the cylindrical gear strain value sequences in the controller are recorded by the slip ring power supply.

[0066] In an optional embodiment, when each first detection member generates each strain signal, the strain signal is transmitted to the first signal generator, and then the signal generator transmits each strain signal through the first transmitting coil, and each strain signal is received by the receiving coil. When each second detection member generates each strain signal, the strain signal is transmitted to the second signal generator, and then the signal generator transmits each strain signal through the second transmitting coil, and each strain signal is received by the receiving coil.

[0067] In an optional embodiment, when five first detection pieces and five second detection pieces are included in the face gear split-torque transmission uniform load test device, three first detection pieces are respectively attached to the adjacent three tooth roots of the first face gear 11, and the three first detection pieces are respectively marked as DS1, DS2 and DS3, and the other two first detection pieces are respectively attached to the two side walls of the middle tooth root between the adjacent three tooth roots where DS1, DS2 and DS3 are attached, and the two first detection pieces are respectively marked as DS4 and DS5, three second detection pieces are respectively attached to the adjacent three tooth roots of the second face gear 12, and the three second detection pieces are respectively marked as US1, US2 and US3, and the other two second detection pieces are respectively attached to the two side walls of the middle tooth root between the adjacent three tooth roots where US1, US2 and US3 are attached, and the two second detection pieces are respectively marked as US4 and US5; the area where the first input cylindrical gear 13 is located is marked as 1, the area where the first idler gear 15 is located is marked as 2, the area where the second input cylindrical gear 14 is located is marked as 3, the area where the second idler gear 16 is located is marked as 4, and the area where the output cylindrical gear 17 is located is marked as 5; four third detection pieces of adjacent four tooth roots are respectively marked as C1, C2, C3 and C4.

[0068] Step S12: dividing all face gear tooth root strain value sequences returned by the receiving coil into a plurality of first face gear tooth root strain value sequences and a plurality of second face gear tooth root strain value sequences, any one first face gear tooth root strain value sequence includes a plurality of first face gear tooth root strain values, and one-time meshing process of one cylindrical gear with the tooth root where any one first detection piece is located generates a first face gear tooth root strain value sequence, and any one second strain value sequence includes a plurality of second face gear tooth root strain values, and one-time meshing process of one cylindrical gear with the tooth root where any one second detection piece is located generates a second face gear tooth root strain value sequence.

[0069] In an alternative embodiment, the three tooth roots where the five first detection elements are located are respectively DS1-1, DS2-1, DS3-1, DS4-1, DS5-1, DS1-2, DS2-2, DS3-2, DS4-2, DS5-2, DS1-3, DS2-3, DS3-3, DS4-3, DS5-3, DS1-4, DS2-4, DS3-4, DS4-4, DS5-4, DS1-5, DS2-5, DS3-5, DS4-5, DS5-5, and the three tooth roots where the five second detection elements are located are respectively US1-1, US2-1, US3-1, US4-1, US5-1, US1-2, US2-2, US3-2, US4-2, US5-2, US1-3, US2-3, US3-3, US4-3, US5-3, US1-4, US2-4, US3-4, US4-4, US5-4, US1-5, US2-5, US3-5, US4-5, US5-5, and the four tooth roots where the four third detection elements are located are respectively C1, C2, C3, C4.

[0070] Step S13: According to the direction of rotation of the first face gear 11 and the phase difference between each of the first face gear tooth root strain value sequences, the cylindrical gear engaged with the tooth root where the first detection element is located when each of the first face gear tooth root strain value sequences is generated is determined respectively; according to the direction of rotation of the second face gear 12 and the phase difference between each of the second face gear tooth root strain value sequences, the cylindrical gear engaged with the tooth root where the second detection element is located when each of the second face gear tooth root strain value sequences is generated is determined respectively.

[0071] In an alternative embodiment, when the direction of rotation of the first face gear 11 is clockwise, the cylindrical gears corresponding to each of the first face gear tooth root strain value sequences are in turn the first input cylindrical gear 13, the second idler gear 16, the output cylindrical gear 17, the second input cylindrical gear 14, and the first idler gear 15. Since there is a time difference between the tooth root where each first detection element is located and each cylindrical gear engaged, the cylindrical gear corresponding to each first face gear tooth root strain value sequence can be obtained according to the phase difference between each first face gear tooth root strain value sequence. The second face gear 12 is similar.

[0072] In an optional embodiment, the (DS1-1, DS2-1, DS3-1, DS4-1, DS5-1) are five first face gear tooth root strain value sequences generated in a first meshing process of the first input cylindrical gear 13 and the three tooth roots where the five first detection members are located, that is, the meshing gear corresponding to the five first face gear tooth root strain value sequences is the first input cylindrical gear 13; subsequent face gear tooth root strain value sequences are similar.

[0073] Step S14: determining the load sharing value at each cylindrical gear according to the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence corresponding to each cylindrical gear.

[0074] In an optional embodiment, any one of the first face gear tooth root strain values in the sequence generated when the tooth root where each first detection member is located is first meshed with the first input cylindrical gear 13 is selected, and any one of the second face gear tooth root strain values in the sequence generated when the tooth root where each second detection member is located is first meshed with the first input cylindrical gear 13 is selected, and the load sharing at the first input cylindrical gear 13 is the ratio of the first face gear tooth root strain value and the second face gear tooth root strain value. The load sharing values at the second input cylindrical gear 14, the first idler gear 15, the second idler gear 16, and the output cylindrical gear 17 are similar.

[0075] In an optional embodiment, when the face gear split-torque transmission load sharing test device has a plurality of first detection members and a plurality of second detection members, each cylindrical gear corresponds to a plurality of first face gear tooth root strain value sequences and a plurality of second face gear tooth root strain value sequences, and the above step S14 specifically includes:

[0076] normalizing the maximum strain value in each second face gear 12 tooth root strain value sequence corresponding to each cylindrical gear to obtain a normalized second tooth root strain value corresponding to each cylindrical gear; and determining the load sharing value at each cylindrical gear according to the normalized first tooth root strain value and the normalized second tooth root strain value corresponding to each cylindrical gear.

[0077] In an alternative embodiment, DS-1 to DS-5-5 are divided by the maximum strain value C1-1 of C1 respectively, as an alternative embodiment, DS-1 to DS-5-5 are divided by the maximum strain value of C2 or C3 or C4 respectively; then the average value is calculated, that is, (DS1-1 / C1-1+DS2-1 / C1-1+DS3-1 / C1-1+DS4-1 / C1-1+DS5-1 / C1-1) / 5=DA1, and so on, DA2, DA2, DA3, DA4, DA5, UA1, UA2, UA3 UA4, UA5 can be obtained; that is, the uniform load at the first input cylindrical gear 13 is DA1 / UA1, the uniform load value at the first idler 15 is DA2 / UA2, the uniform load value at the second input cylindrical gear 14 is DA3 / UA3, the uniform load value at the second idler 16 is DA4 / UA4, and the uniform load value of the output cylindrical gear 17 is DA5 / UA5.

[0078] The uniform load test method provided by the embodiment can obtain the face gear tooth root strain value sequence through each first detection member and each second detection member, divide the face gear tooth root strain value sequence into a plurality of first face gear tooth root strain value sequences and a plurality of second face gear tooth root strain value sequences, the first face gear tooth root strain value sequence is generated in the one-time meshing process of one cylindrical gear and the tooth root where any one first detection member is located, and the second face gear tooth root strain value sequence is generated in the one-time meshing process of one cylindrical gear and the tooth root where any one second detection member is located, the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence corresponding to each cylindrical gear can reflect the load size of each cylindrical gear, and the uniform load value at each cylindrical gear can be directly determined through the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence corresponding to each cylindrical gear; therefore, it is not necessary to control each cylindrical gear, and it is not necessary to consider the power loss in the face gear split-torque transmission process, thereby improving the accuracy of the face gear split-torque transmission uniform load performance calculation.

[0079] In an alternative embodiment, the strain value sequence is divided into a first face gear tooth root strain value sequence and a second face gear tooth root strain value sequence according to the value generated by the keying signal generator in the above step S12.

[0080] The values generated by the five first detection members on the adjacent three tooth roots of the first face gear 11 are calibrated according to the value transmitted back by the keying signal generator, when the first face gear 11 tooth root strain value is generated, that is, the cylindrical tooth root strain value is transmitted back by the keying signal generator, that is, when one cylindrical tooth root strain value is generated, one first face gear tooth root strain value is generated at the same time, and all the first face gear tooth root strain value sequences can be identified according to the generated cylindrical tooth root strain value, and the remaining face gear tooth root strain value sequences are the second face gear tooth root strain value sequences.

[0081] Obviously, the above-mentioned embodiments are only examples for clearly illustrating the present application, and are not intended to limit the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and also impossible to enumerate all the embodiments. The obvious changes or variations derived from the above description are still within the protection scope of the present application.

Claims

1. A face gear split-torque transmission uniform load testing device, characterized in that, The face gear split-torque transmission structure comprises a first face gear (11) and a second face gear (12) arranged oppositely, and a plurality of cylindrical gears arranged between the first face gear (11) and the second face gear (12); At least one first detection member is connected with one tooth root part of the first face gear (11), and is used to generate a first face gear tooth root strain value sequence when any one of the cylindrical gears meshes with the tooth root where the first detection member is located; At least one second detection member is connected with one tooth root part of the second face gear (12), and is used to generate a second face gear tooth root strain value sequence when any one of the cylindrical gears meshes with the tooth root where the second detection member is located; A keying signal generator is connected with any one of the cylindrical gears, and is used to identify the first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence; All the detection members and the keying signal generator are electrically connected with a controller, and the controller is used to collect the first face gear tooth root strain value sequence, the second face gear tooth root strain value sequence and the value generated by the keying signal generator. A slip ring current lead is also included, which is in sliding connection with the cylindrical gear where the keying signal generator is located, and is electrically connected with the keying signal generator.

2. The face gear split-torque transmission load sharing test device of claim 1, wherein, Further comprising:

3. The face gear split-torque transmission load sharing test apparatus of claim 2 wherein, A first signal generator is arranged on the first face gear (11), and is connected with all the first detection members on the first face gear (11); A second signal generator is arranged on the second face gear (12), and is connected with all the second detection members on the second face gear (12); A first transmitting coil is connected with the first signal generator; A second transmitting coil is connected with the second signal generator. Further comprising:

4. The face gear split-torque transmission load sharing test apparatus of claim 3 wherein, A housing, in which the face gear split-torque transmission structure is arranged; A receiving coil is fixed on the inner wall of the housing, and is electrically connected with the controller. Further comprising:

5. The gear testing device of any one of claims 1-4, wherein, The plurality of cylindrical gears comprises two input cylindrical gears, two idlers and one output cylindrical gear (17); At least one third detection member is attached to any one tooth root part of one of the cylindrical gears, and is used to generate a cylindrical gear tooth root strain value sequence when the first face gear (11) or the second face gear (12) meshes with the tooth root where the third detection member is located; the keying signal generator is connected with the third detection member, and the keying signal generator and the slip ring current lead are arranged on the cylindrical gear where the third detection member is located. The method comprises the following steps:

6. A load sharing test method, suitable for using the face gear split-torque transmission load sharing test device according to any one of claims 1 to 5, characterized in that, Obtaining the face gear tooth root strain value sequences generated by the first detection members and the second detection members during the rotation of the face gear split-torque transmission structure; ​ The face gear tooth root strain value sequence is divided into a plurality of first face gear tooth root strain value sequences and a plurality of second face gear tooth root strain value sequences, any first face gear tooth root strain value sequence includes a plurality of first face gear tooth root strain values, and one-time meshing of one of the cylindrical gears and the tooth root where any one of the first detection members is located generates a first face gear tooth root strain value sequence, and any second face gear tooth root strain value sequence includes a plurality of second face gear tooth root strain values, and one-time meshing of one of the cylindrical gears and the tooth root where any one of the second detection members is located generates a second face gear tooth root strain value sequence; According to the direction of rotation of the first face gear (11) and the phase difference between each first face gear tooth root strain value sequence, the cylindrical gear meshing with the tooth root where the first detection member is located when each first face gear tooth root strain value sequence is generated is determined respectively; according to the direction of rotation of the second face gear (12) and the phase difference between each second face gear tooth root strain value sequence, the cylindrical gear meshing with the tooth root where the second detection member is located when each second face gear tooth root strain value sequence is generated is determined respectively; According to the corresponding first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence of each cylindrical gear, the load sharing value at each cylindrical gear is determined.

7. The equal-load testing method according to claim 6, wherein When the face gear torque sharing transmission load test device has a plurality of first detection members and a plurality of second detection members, each cylindrical gear corresponds to a plurality of first face gear tooth root strain value sequences and a plurality of second face gear tooth root strain value sequences, and according to the corresponding first face gear tooth root strain value sequence and the second face gear tooth root strain value sequence of each cylindrical gear, the load sharing value at each cylindrical gear is determined, and the step includes: Normalizing the maximum strain value in each first face gear tooth root strain value sequence corresponding to each cylindrical gear to obtain the normalized first tooth root strain value corresponding to each cylindrical gear; Normalizing the maximum strain value in each second face gear tooth root strain value sequence corresponding to each cylindrical gear to obtain the normalized second tooth root strain value corresponding to each cylindrical gear; According to the normalized first tooth root strain value and the normalized second tooth root strain value corresponding to each cylindrical gear, the load sharing value at each cylindrical gear is determined.

8. The load test method according to claim 7, wherein According to the value generated by the key phase signal generator when each face gear tooth root strain value sequence is generated, the strain value sequence is divided into a first face gear tooth root strain value sequence and a second face gear tooth root strain value sequence.

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