CN113125153A - Torsional vibration testing device of power transmission system - Google Patents
Torsional vibration testing device of power transmission system Download PDFInfo
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- CN113125153A CN113125153A CN202110549594.1A CN202110549594A CN113125153A CN 113125153 A CN113125153 A CN 113125153A CN 202110549594 A CN202110549594 A CN 202110549594A CN 113125153 A CN113125153 A CN 113125153A
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- fluted disc
- sensor
- torsional vibration
- detection
- power transmission
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/028—Acoustic or vibration analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/10—Measuring characteristics of vibrations in solids by using direct conduction to the detector of torsional vibrations
Abstract
The present disclosure provides a torsional vibration testing apparatus for a drivetrain, comprising: the fluted disc device comprises at least one detection fluted disc, the detection fluted disc comprises a fluted disc and a plurality of detection teeth which are integrally arranged on the periphery of the fluted disc and are uniformly arranged along the circumferential direction of the fluted disc, the detection fluted disc is connected to the power transmission system to replace corresponding transmission parts when in detection, and the fluted disc comprises a connecting structure which is configured to be connected with the transmission parts connected with the replaced corresponding transmission parts in the power transmission system; the sensing device comprises at least one sensor which is arranged corresponding to at least one detection fluted disc, and the sensor is configured to be matched with the corresponding detection fluted disc to acquire rotation information of the sensor; and the control device is in signal connection with the sensing device and is configured to receive the rotation information and calculate and output torsional vibration information of the power transmission system according to the rotation information. The torsional vibration testing device is beneficial to improving the testing accuracy and saving the testing time.
Description
Technical Field
The disclosure relates to the technical field of testing of power transmission systems, in particular to a torsional vibration testing device.
Background
The power transmission system of the engineering vehicle is a multi-degree-of-freedom torsional vibration system. Torsional vibration generated by a power transmission system when the engineering vehicle works causes the power performance of the power transmission system not to be fully exerted, the economy is deteriorated, meanwhile, the trafficability, the operation stability and the smoothness of the engineering vehicle are influenced, and passengers are easy to feel uncomfortable and fatigue.
The excitation source of the torsional vibration of the power train of the engineering vehicle is:
1. the imbalance of output torque caused by the change of gas pressure in the cylinder of the engine cylinder and the change of inertia force of the crankshaft connecting rod mechanism, and the change of engine torque caused by the operation and working processes are main excitation sources of torsional vibration of the power transmission system;
2. in the case of a universal joint of a power transmission system having an axial angle, even if the input rotational speed is constant, the output rotational speed will generate periodic fluctuation, and the excitation vibration generated thereby will possibly cause the power transmission system to resonate;
3. load fluctuations during transmission gear engagement are the primary source of excitation for the transmission itself;
4. the unbalanced mass of rotating components such as tires, hubs, brake discs, etc., and the excitation of rough road surfaces can cause torsional vibration of the drivetrain.
When the excitation frequency of the torsional vibration is consistent with the natural frequency of the power transmission system, torsional resonance occurs, certain sections in the power transmission system often generate larger torsional amplitude to form a large resonant load, the dynamic stress caused by the resonant load generally exceeds the static working stress a lot, the fatigue life of related parts is greatly reduced, the working reliability of the related parts is influenced, even negative torque is generated, knocking occurs between a gear pair and a spline pair, uncomfortable noise is generated, and in severe cases, parts of the power transmission system are damaged due to insufficient strength, and the working reliability and the service life of the power transmission system are influenced. Meanwhile, the torsional vibration of the power transmission system and the vibration of the whole engineering vehicle have respective inherent vibration characteristics, and the vibration coupling (generally thought to exist at a drive axle) can cause the vibration of the whole engineering vehicle.
Due to the fact that the structure of a power transmission system of the engineering vehicle is complex and changeable, torsional vibration response under multiple excitations is measured accurately through torsional vibration tests when the engineering vehicle is designed and parts are selected, characteristics of torsional vibration are researched, and a matching mechanism is mastered.
The main test methods for the torsional vibration test of the power transmission system are a road test method and a bench test method (a rotary drum test bench), and a sensor and a tested shaft used in the general test are installed in a non-contact mode and are measured digitally. The sensors used for testing include a magnetoelectric sensor, a photoelectric encoder and the like. For example, a magnetoelectric measurement method using a magnetoelectric sensor may be used for non-contact measurement.
In the related technology of performing digital measurement on torsional vibration of a power transmission system by adopting a magnetoelectric measurement method, when the torsional vibration of the power transmission system is tested, a uniformly-graduated signal fluted disc is generally installed at a test point of a transmission shaft of the power transmission system, a magnetoelectric sensor is fixed on the outer side of the signal fluted disc, when the signal fluted disc rotates along with the transmission shaft, an original magnetoelectric pulse signal is induced by the magnetoelectric sensor opposite to the signal fluted disc, the original magnetoelectric pulse signal is shaped to form a square wave pulse signal, duty ratio counting is performed on the square wave pulse signal output by the magnetoelectric sensor by high-frequency clock pulse, and the corresponding time of each square wave pulse interval of the square wave pulse signal is obtained by conversion. The upper computer reads the time series from the buffer area of the single chip microcomputer and then processes the time series to extract the torsional vibration signal.
During a torsional vibration test of the power transmission system, a signal fluted disc needs to be designed and processed according to the installation space of a tested point and the arrangement condition of the power transmission system, the signal fluted disc is installed on the periphery of a corresponding transmission part during the test, and the installation gap between the signal fluted disc and the corresponding transmission part is adjusted to meet the requirement of coaxiality between the excircle of the signal fluted disc and the corresponding transmission part. The magnetoelectric sensor is fixed on the frame through the support to guarantee that the verticality and the clearance of the head of the magnetoelectric sensor and the excircle of the signal fluted disc meet the test requirements.
Disclosure of Invention
The purpose of the disclosure is to provide a torsional vibration testing device of a power transmission system, which aims to improve the testing accuracy and save the testing time.
The present disclosure provides a torsional vibration testing apparatus for a drivetrain, comprising:
the fluted disc device comprises at least one detection fluted disc, the detection fluted disc comprises a fluted disc and a plurality of detection teeth which are integrally arranged on the periphery of the fluted disc and are uniformly arranged along the circumferential direction of the fluted disc, the detection fluted disc is configured to be connected in the power transmission system to replace corresponding transmission parts of the power transmission system during detection, the fluted disc comprises a connecting structure, and the connecting structure of the fluted disc is configured to be connected with the transmission parts which are connected with the replaced corresponding transmission parts in the power transmission system; and
a sensing device including at least one sensor disposed in correspondence with the at least one detecting cog, the sensor configured to cooperate with the corresponding detecting cog to acquire rotational information of the corresponding detecting cog;
and the control device is in signal connection with the sensing device and is configured to receive the rotation information and calculate and output torsional vibration information of the power transmission system according to the rotation information.
In some embodiments of the torsional vibration test apparatus,
the at least one detection fluted disc comprises a first detection fluted disc and a second detection fluted disc which are used for replacing two transmission parts at the two axial ends of a transmission part to be detected of the power transmission system, and the first detection fluted disc and the second detection fluted disc are configured to be respectively connected to the two axial ends of the transmission part to be detected of the power transmission system during detection;
sensing device include with first sensor that first detection fluted disc corresponds the setting and with the second sensor that the second detection fluted disc corresponds the setting, the rotation information includes that first sensor acquires the first rotation information of first detection fluted disc with the second sensor acquires the second rotation information of second detection fluted disc.
In some embodiments of the torsional vibration test apparatus,
the transmission component to be detected is an elastic coupling between an engine flywheel and a coupling flange of the power transmission system,
the first detection fluted disc is configured to replace the engine flywheel during detection, and the connecting structure of the first detection fluted disc comprises an engine connecting part used for being connected with an engine output shaft of the power transmission system and a first shaft connector connecting part used for being connected with the axial first end of the elastic coupling;
the second detection fluted disc is configured to replace the coupling flange when detecting, and the connecting structure of the second detection fluted disc includes a drive shaft connecting portion for connecting a second coupling connecting portion with the axial second end of the elastic coupling and for connecting with a drive shaft of the power transmission system.
In the torsional vibration testing apparatus of some embodiments, the sensor is a magneto-electric sensor or a photo-electric sensor.
In the torsional vibration testing apparatus of some embodiments, further comprising a mounting bracket configured to support the sensor.
In the torsional vibration test apparatus of some embodiments, a mounting position of the sensor supported by the mounting bracket is adjustably set.
In some embodiments of the torsional vibration test apparatus,
the mounting position of the mounting bracket is adjustably set; and/or
The mounting bracket comprises more than two mounting assemblies, and the assembling positions of at least two of the more than two mounting assemblies are adjustably arranged; and/or
The mounting position of the sensor on the mounting bracket is adjustably set.
In the torsional vibration testing apparatus of some embodiments, the mounting bracket includes a mounting base including a first elongated hole for fixing the mounting bracket, the first elongated hole being configured to cooperate with a bolt to fix the mounting base.
In the torsional vibration testing apparatus of some embodiments, the mounting bracket includes two or more mounting assemblies, an assembly position of at least two mounting assemblies is adjustably set, the at least two mounting assemblies include:
installing a base;
and the sensor mounting seat comprises a sensor mounting part, and the mounting position of the sensor mounting seat is adjustably mounted on the mounting base.
In the torsional vibration testing apparatus of some embodiments, the mounting bracket includes:
the screw penetrates through the mounting base and the sensor mounting base, and the length direction of the screw and the extending direction of the first strip hole form an included angle; and
and the locking nuts are used for locking the screw rods on the mounting base and the sensor mounting base.
In some embodiments of the torsional vibration test apparatus,
the mounting base is provided with a second elongated hole;
the sensor mounting base is provided with a third strip hole which is arranged at an included angle with the second strip hole, and the sensor mounting base is connected through a threaded connecting piece which penetrates through the second strip hole and the third strip hole.
In some embodiments of the torsional vibration testing apparatus, the detecting chainring is configured to have the same moment of inertia as the respective transmission member of the drivetrain that is replaced.
In the torsional vibration testing apparatus of some embodiments, the connection structure of the disk is configured to be identical to a connection structure of a corresponding transmission member replaced in the power transmission system for connection with a connected transmission member.
Based on this torsional vibration testing arrangement of power transmission system that this disclosure provided, because utilize the detection fluted disc directly to replace the corresponding transmission part of being surveyed power transmission system when testing, then acquire the rotation information that detects the fluted disc as corresponding transmission part at power transmission system's rotation information and acquire power transmission system's torsional vibration information through the sensor, because a plurality of detection teeth that detect the fluted disc set up with the rim plate is integrative, the machining error of detection tooth can effective control, there is not the installation error between signal fluted disc and the corresponding transmission part among the correlation technique between detection tooth and the rim plate, and the installation and debugging is convenient, do benefit to and improve the test accuracy, do benefit to saving test time.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:
fig. 1 is a schematic structural diagram of a torsional vibration testing apparatus for a power transmission system according to an embodiment of the present disclosure, wherein a detecting toothed disc of the torsional vibration testing apparatus is installed in the power transmission system instead of a corresponding transmission component.
Fig. 2 is a schematic structural diagram of a torsional vibration testing apparatus for a powertrain system according to an embodiment of the present disclosure, in which an example of a control apparatus is schematically shown.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present disclosure, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present disclosure.
In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the orientation terms is generally based on the orientation or positional relationship shown in the drawings, and is for convenience only to facilitate the description of the present disclosure and to simplify the description, and in the case of not having been stated to the contrary, these orientation terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be taken as limiting the scope of the present disclosure; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
In the course of implementing the present disclosure, the inventors found that the following disadvantages are present in the related art:
1. the signal fluted disc corresponding to the corresponding transmission part of the power transmission system needs to be designed, processed and installed, so that the installation and debugging are inconvenient, and the test period is long.
2. The eccentric mass caused by the manufacturing error and the mounting error of the signal fluted disc can influence the dynamic balance of a power transmission system, and the bending vibration or the bending-torsion coupling resonance of a transmission shaft can be easily caused. The change and the relative motion of a magnetic gap between the magnetoelectric sensor and the measuring fluted disc caused by bending vibration or bending-torsional coupling resonance can modulate and modulate the voltage of an original magnetoelectric pulse signal and influence the accuracy of torsional vibration analysis.
3. The installation of the independent signal fluted disc is equivalent to the installation of a rotary inertia on the corresponding transmission part, so that the vibration characteristic of the test object is changed.
4. Due to factors such as machining errors and installation errors, the accurate installation position of the magnetoelectric sensor is not easy to guarantee, and the quality of a torsional vibration test signal is directly influenced.
Based on this, the disclosed embodiment proposes a torsional vibration test device 10 for a drivetrain. As shown in fig. 1, the torsional vibration test apparatus 10 of this embodiment includes a toothed disc apparatus, a sensing apparatus, and a control apparatus 15.
As shown in fig. 1, the fluted disc device includes at least one detecting fluted disc, the detecting fluted disc includes a fluted disc and a plurality of detecting teeth integrally arranged on the outer periphery of the fluted disc and uniformly arranged along the circumferential direction of the fluted disc, and the detecting fluted disc is configured to be connected in the power transmission system to replace a corresponding transmission part of the power transmission system when detecting. The wheel disc includes a connection structure configured to connect a transmission component of the drivetrain that is connected to the respective transmission component that is replaced.
The sensing device includes at least one sensor disposed in correspondence with at least one of the detecting chainrings of the chainring arrangement, the sensor being configured for use with the corresponding detecting chainring to acquire rotational information of the corresponding detecting chainring.
The control device 15 is in signal connection with the sensing device and is configured to receive the rotation information and to calculate and output torsional vibration information of the driveline based on the rotation information.
When the torsional vibration testing device disclosed by the embodiment of the disclosure is used for carrying out torsional testing on a power transmission system, the detection fluted disc is used for directly replacing a corresponding transmission part of the tested power transmission system, then the rotation information of the detection fluted disc is acquired through the sensor and is used as the rotation information of the corresponding transmission part in the power transmission system to acquire the torsional vibration information of the power transmission system, as the multiple measurement fluted discs of the detection fluted disc are integrally arranged with the wheel disc, the machining error of the detection teeth can be effectively controlled, the installation error between the signal fluted disc and the corresponding transmission part in the related technology does not exist between the detection teeth and the wheel disc, and the installation and debugging are convenient, so that the testing time is favorably saved.
Because the detection fluted disc is adopted to directly replace a corresponding transmission part of the power transmission system to carry out torsional vibration test, compared with the related technology, the eccentric mass caused by the manufacturing error and the installation error of the signal fluted disc does not exist, the influence on the dynamic balance of the power transmission system is easily reduced by improving the manufacturing and installation precision of the detection fluted disc, the phenomenon of transmission shaft bending vibration or bending-torsional coupling resonance caused by the signal fluted disc can be relieved, thereby reducing the magnetic gap change and the relative motion between the magnetoelectric sensor and the measurement fluted disc caused by the bending vibration or bending-torsional coupling resonance, improving the precision of torsional vibration analysis and being beneficial to improving the test accuracy.
The size, structure, material, machining precision, etc. of the wheel disc detecting the toothed disc can be set according to the size and structure of the respective transmission part to be replaced, for example: the number of the detection teeth of the detection fluted disc determines the pulse number detected by the sensor, the pulse number determines the detection precision, the structure and the number of the detection teeth can be set according to the detection requirements, and different detection parts correspond to different moduli.
The detecting chainring is configured to have the same rotational inertia as the respective transmission member of the drivetrain being replaced. The device can better simulate the real working condition of the power transmission system during the torsional vibration test.
The connection structure of the wheel disc is configured to be identical to the connection structure of the replaced corresponding transmission member in the power transmission system for connecting with the connected transmission member. The connecting part of the detection fluted disc and the connected transmission component is the same as the connecting part of the replaced transmission component and the adjacent component. The device can better simulate the real working condition of the power transmission system during the torsional vibration test.
As shown in fig. 1, in some embodiments, the at least one detecting chainring of the chainring arrangement includes a first detecting chainring 11 and a second detecting chainring 12. The first detecting fluted disc 11 and the second detecting fluted disc 12 are used for replacing two transmission components at two axial ends of a transmission component to be detected of the power transmission system, and the first detecting fluted disc 11 and the second detecting fluted disc 12 are configured to be respectively connected to two axial ends of the transmission component to be detected of the power transmission system during detection. The sensing means comprise a first sensor 13 arranged in correspondence with the first detecting toothed disc 11 and a second sensor 14 arranged in correspondence with the second detecting toothed disc 12. The rotational information includes first rotational information of the first detecting toothed disc 11 acquired by the first sensor 13 and second rotational information of the second detecting toothed disc 12 acquired by the second sensor 14.
The torsional vibration testing device 10 of the embodiment can test the overall torsional vibration performance of the power transmission system, and can also perform a torsional test on the detected transmission component at the same time in a targeted manner to acquire the torsional vibration performance of the detected transmission component.
The transmission component to be tested is, for example, an elastic coupling 20 between the engine flywheel and the coupling flange of the drivetrain. The first detecting fluted disc 11 is configured to replace an engine flywheel of the power transmission system during detection, and the connecting structure of the first detecting fluted disc 11 comprises an engine connecting part for connecting with an engine output shaft of the power transmission system and a first shaft connector connecting part for connecting with the axial first end of the elastic coupling 20. The second detecting toothed disc 12 is configured to detect, instead of the coupling flange of the power transmission system, the connecting structure of the second detecting toothed disc 12 includes a second coupling connecting portion 123 for connecting with the axial second end of the elastic coupling 20 and a transmission shaft connecting portion 124 for connecting with the transmission shaft 30 of the power transmission system.
The torsional vibration test apparatus 10 of this embodiment is suitable for testing the entire torsional vibration performance of a power transmission system including the elastic coupling 20, and may also simultaneously test the torsional vibration performance of the elastic coupling 20 itself.
Each sensor of the sensing device may be a magnetoelectric sensor, such as a hall gear sensor, or may be a photoelectric sensor. The magnetoelectric sensor and the photoelectric sensor can convert the acquired magnetic signal or electric signal into an electric signal, and the calculation of the torsional vibration information by the control device 15 is facilitated.
As shown in fig. 1, in some embodiments, the torsional vibration testing apparatus 10 further includes a mounting bracket 16, the mounting bracket 16 being configured to support the sensor. The mounting bracket 16 is provided to fix the sensor at a position where the sensor is inconvenient to mount, for example, the sensor is fixed to a vehicle frame, so that the sensor is located at a proper working position, and accurate rotation information of the corresponding detection fluted disc can be acquired.
As shown in FIG. 1, in some embodiments, the mounting position of the sensor supported by the mounting bracket 16 is adjustably set. For example, the mounting position of the mounting bracket 16 is adjustably set; and/or the mounting bracket 16 comprises more than two mounting assemblies, the assembly position of at least two mounting assemblies being adjustably set; and/or the mounting location of the sensor on the mounting bracket 16. The purpose of the above arrangement is to enable the sensor to be in the best working position, and more accurate rotation information of the corresponding detection fluted disc is obtained.
One mounting bracket 16 may be provided for each sensor, or at least one sensor may be provided on a corresponding stationary bracket, with the remaining sensors being provided on a stationary component that is stationary with respect to the drivetrain, such as on the flywheel housing 40 of the engine of the drivetrain.
As shown in fig. 1, in some embodiments, mounting bracket 16 includes a mounting base 161, and mounting base 161 includes a first elongated hole 1611 for securing mounting bracket 16, first elongated hole 1611 configured to mate with a bolt to secure mounting base 161. In this arrangement, by changing the fitting position between the bolt and the first elongated hole 1611, the mounting position of the mounting bracket 16 can be changed, thereby changing the position of the sensor on the mounting bracket 16.
As shown in fig. 1, in some embodiments, the mounting bracket 16 includes more than two mounting assemblies, at least two of which are adjustably positioned in their assembled position, including a mounting base 161 and a sensor mount 162. The sensor mount 162 includes a sensor mounting portion, and the mounting position of the sensor mount 162 is adjustably mounted on the mounting base 161. As shown in fig. 1, the mounting bracket 16 includes a threaded rod 163 and a plurality of retaining nuts 164. The screw 163 passes through the mounting base 161 and the sensor mounting base 162, and the length direction of the screw 163 is disposed at an angle to the extending direction of the first elongated hole 1611. A plurality of retaining nuts 164 retain the screw 163 to the mounting base 161 and the sensor mount 162.
The relative position between the mounting base 161 and the sensor mounting seat 162 can be adjusted by locking the screw 163 to the positions of the mounting base 161 and the sensor mounting seat 162 through nuts, so that the relative position between the sensor and the mounting base 161 can be adjusted to facilitate accurate positioning of the sensor.
The length direction of the screw 163 forms an included angle with the extending direction of the first elongated hole 1611, so that the sensor can be adjusted from two directions, and the sensor can be accurately positioned, and the measuring accuracy is improved. The screw 163 and the first elongated hole 1611 are preferably perpendicular to each other to facilitate quick adjustment of the mounting position of the sensor.
In some embodiments, not shown, the mounting base has a second elongated aperture; the sensor mounting base is provided with a third strip hole which is arranged at an included angle with the second strip hole, and the sensor mounting base is connected through a threaded connecting piece which penetrates through the second strip hole and the third strip hole. When the mounting base and the sensor mounting base are mounted, the relative positions of the mounting base and the sensor mounting base can be adjusted by changing the relative positions of the threaded connecting piece, the second strip hole and the third strip hole, so that the position of a sensor on the mounting support can be changed. The second elongated hole and the third elongated hole are preferably perpendicular to each other to facilitate quick adjustment of the mounting position of the sensor.
The torsional vibration test apparatus 10 for a powertrain system according to the embodiment of the present disclosure will be further described with reference to fig. 1 and 2. In FIG. 1, a torsional vibration test apparatus 10 is installed in a drivetrain under test in a manner that tests a chainring in place of the corresponding drivetrain components of the drivetrain.
As shown in fig. 1, the torsional vibration test apparatus 10 includes a toothed disc apparatus, a sensing apparatus, a control apparatus 15, and a mounting bracket 16.
The toothed disc device comprises two detection toothed discs, namely a first detection toothed disc 11 and a second detection toothed disc 12. Every detects the fluted disc and includes the rim plate and an organic whole set up in a plurality of detection teeth that the circumference of rim plate periphery was evenly arranged. Each sensing cog is configured to be attached to the drivetrain upon sensing in place of a corresponding drive component of the drivetrain.
The sensing means comprises two sensors, a first sensor 13 and a second sensor 14. Both sensors are magnetoelectric sensors, in particular hall gear sensors.
In the embodiment shown in fig. 1, the elastic coupling 20 of the drive train, which is arranged between the engine flywheel and the coupling flange, serves as the transmission component to be tested, and the torsional vibration information of the control device 15 includes the torsional vibration information of the elastic coupling 20.
The first detecting toothed disc 11 includes a first disc 111 and a plurality of first detecting teeth 112 integrally disposed on the outer periphery of the first disc 111 and uniformly arranged along the circumferential direction of the first disc 111. The first detecting fluted disc 11 is configured to replace an engine flywheel of the power transmission system during detection, and the connecting structure of the first detecting fluted disc 11 comprises an engine connecting part for connecting with an engine output shaft of the power transmission system and a first shaft connector connecting part for connecting with the axial first end of the elastic coupling 20. The engine attachment portion includes, for example, an attachment key; the first coupling connecting portion includes, for example, a plurality of connecting holes. The connection structure and the moment of inertia of the first detecting toothed disc 11 are identical to the corresponding connection structure and moment of inertia of the engine flywheel being replaced.
The second detecting toothed disc 12 includes a second disc 121 and a plurality of second detecting teeth 122 integrally disposed on the outer periphery of the second disc 121 and uniformly arranged along the circumferential direction of the second disc 121. The second detecting toothed disc 12 is configured to detect, instead of the coupling flange of the power transmission system, the connecting structure of the second detecting toothed disc 11 includes a second coupling connecting portion 123 for connecting the second axial end of the elastic coupling 20 and a transmission shaft connecting portion 124 for connecting the transmission shaft 30 of the power transmission system. The drive shaft connecting portion 124 includes, for example, a hinge lug, and the second coupling connecting portion 123 includes, for example, a plurality of connecting holes. The connection structure and the moment of inertia of the second detection toothed disc 12 are identical to the corresponding connection structure and moment of inertia of the coupling flange being replaced.
The plurality of first detection teeth 112 may be 127 involute teeth with a modulus of 3.5, for example. The plurality of second detection teeth 122 may be, for example, 60 involute teeth with a modulus of 3.5. Wherein the involute teeth may be replaced with other tooth shapes, such as rectangular teeth. The number or modulus of the sensing teeth may also be varied according to testing requirements.
The first sensor 13 of the sensing device is arranged corresponding to the first detecting toothed disc 11. The first sensor 13 is configured for use with the first detecting toothed disc 11 to detect first rotational information of the first detecting toothed disc 11. The first rotational information may be indicative of rotational information of an engine flywheel in the powertrain. During detection, the first sensor 13 is fixedly mounted on a flywheel housing 40 of the power transmission system.
The second sensor 14 is disposed corresponding to the second detecting toothed disc 12. The second sensor 14 is configured for use with the second detecting toothed disc 12 to detect second rotational information of the second detecting toothed disc 12. The second rotational information may characterize rotational information of the shaft joint flange in the drivetrain. During detection, the second sensor 14 is fixedly mounted on the mounting bracket 16.
In the embodiment shown in fig. 1, the mounting position of the mounting bracket 16 is adjustably set. The mounting bracket 16 includes a mounting base 161 and a sensor mount 162. The mounting base 161 includes a first elongated hole 1611 for securing the mounting bracket 16, the first elongated hole 1611 configured to mate with a bolt to secure the mounting base 161. The sensor mount 162 includes a sensor mounting portion. The sensor mounting portion is, for example, a mounting hole for mounting the sensor, and when the outer periphery of the sensor includes a mounting threaded portion, the mounting hole may be a threaded hole that is engaged with the mounting threaded portion of the sensor.
Wherein the mounting position of the sensor mounting seat 162 is adjustably mounted on the mounting base 161. As shown in fig. 1, the mounting bracket 16 includes a threaded rod 163 and a plurality of retaining nuts 164. The longitudinal direction of the screw 163 is perpendicular to the extending direction of the first elongated hole 1611. The screw 163 passes through the mounting base 161 and the sensor mounting base 162. A plurality of retaining nuts 164 retain the screw 163 to the mounting base 161 and the sensor mount 162.
The control device 15 is in signal connection with the sensing device and is configured to receive the first and second rotation information and to calculate and output torsional vibration information of the drivetrain based on the first and second rotation information. The torsional vibration information includes torsional vibration information of the powertrain and torsional vibration information of the elastic coupling 20 itself.
The control device 15 may be, for example, a conventional torsional vibration measuring device such as a torsional vibration test data collector. As shown in fig. 2, in some embodiments, the control device 15 may include a pre-amplifier circuit 151, a one-shot circuit 152, a low-pass filter circuit 153, a capacitor 154, an integrating and amplifying circuit 155, and a recorder 156, which are sequentially arranged.
In an embodiment not shown, the aforementioned control device 15 can also be implemented as a general-purpose processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, or any suitable combination thereof for executing the functions described in the present disclosure.
When the torsional vibration testing apparatus 10 according to the embodiment of the present disclosure is assembled with the related transmission components of the power transmission system, the flanges at the two ends of the elastic coupling 20 are respectively connected to the first detecting toothed disc 11 replacing the engine flywheel and the second detecting toothed disc 12 replacing the hub flange by bolts.
The first detecting toothed disc 11 is connected to an engine output shaft (not shown) via an engine connecting portion thereof, and the second detecting toothed disc 12 is connected to the transmission shaft 30 via a transmission shaft connecting portion 124 thereof. The first sensor 13 is mounted on the flywheel housing 40. The detecting end of the first sensor 13 faces the periphery of the first detecting fluted disc 11 at intervals and meets the requirement of verticality, and the plurality of first detecting teeth 112 are used as signal discs of the first sensor 13. The distance between the detection end of the first sensor 13 and the tip circle of the first detection teeth 112 is, for example, about 1 mm.
The second sensor 14 is mounted on a sensor mounting portion fixed to the mounting bracket 16. The adjustment and fixation of the test position of the second sensor 14 can be achieved by adjusting the relative position of the bolt connecting the mounting bracket 16 and the first elongated hole 1611 of the mounting base 161 and adjusting the locking positions of the mounting base 161, the sensor mounting base 162 and the screw 163 of the mounting bracket 16. The detecting end of the second sensor 14 faces the periphery of the second detecting fluted disc 12 at intervals and ensures that the verticality requirement is met, and the plurality of second detecting teeth 122 of the second detecting fluted disc 12 are used as the signal code disc of the second sensor 14. The distance between the detection end of the second sensor 14 and the tip circle of the second detection teeth 122 is, for example, about 1 mm.
The signal lines of the sensors are connected to the control device 15, respectively, and then the test can be started.
The first sensor 13 and the second sensor 14 form a test pair, and the test pair is used for measuring the relative torsional vibration at two ends of the elastic coupling 20, providing support for the research of the torsional vibration characteristic of the elastic coupling 20, and monitoring the torsional vibration condition of the whole vehicle.
The principle of the torsional vibration is as follows:
theoretically, the average angular velocity of the sensing toothed disc (e.g., first sensing toothed disc 111 or second sensing toothed disc 121) of the drivetrain instead of the corresponding rotating member
The instantaneous angular velocity ω i fluctuates, and any point of the detection fluted disc is at a tiny time tiInternal wave displacement thetaiThe magnitude of (d) is the amplitude of the torsional vibration of the drivetrain, in deg.
When a sensor (such as the first sensor 13 or the second sensor 14) corresponding to the detection fluted disc collects N pulses per revolution, N pulse signals with unequal periods are output per revolution by 360 degrees due to fluctuation of instantaneous rotating speed, and t is timed for each pulse signaliThe average angular velocity can be obtained
The angular velocity determined for each pulse interval can be regarded as the instantaneous angular velocity ωi：
ωi＝(360°/N)/ti(deg/s)。
Instantaneous angular velocity omegaiAnd average angular velocity
The difference can be regarded as the angular velocity fluctuation Δ ω within each pulsei：
The torsional vibration amplitude (i.e., torsional vibration angle) theta in each pulse can be obtainedi：
θi＝Δωi×ti(deg)。
These torsional angles may represent torsional vibration information of the drivetrain.
When the double sensors are adopted to measure the torsional vibration of the power transmission system, the torsional vibration information of a detected transmission part between the double sensors, such as the elastic coupling, can be determined by calculating the angular velocity difference of the double sensors, so as to determine whether the torsional vibration performance of the elastic coupling meets the requirements.
Taking the power transmission system of the engineering vehicle as an example for testing, the torsional vibration test is started after all the components of the torsional vibration testing device 10 are installed in place. When the test is carried out, firstly, the engine is started, the rotating part of the power transmission system rotates at a low speed, and whether the signals of the sensors are normal or not is checked. And then, adjusting the gearbox to a test gear, raising the engine from idle speed to highest speed, and carrying out no-load condition test, wherein each test point is stable for a period of time, such as about 1 minute. And then, carrying out operation performance and driving performance tests.
In addition, the torsional vibration testing device 10 of the embodiment of the disclosure can be used for installing different types of elastic couplings 20 in a power transmission system and carrying out torsional vibration testing, and the types of the elastic couplings 20 can be selected according to the testing result and the design requirement of the power transmission system.
As can be seen from the above description, the torsional vibration test apparatus of the embodiment of the present disclosure has at least one of the following advantages: the processing and the assembly are completed quickly and effectively, and the testing efficiency is improved; the test can be completed without substantially affecting the dynamic balance of the power transmission system; the torsional vibration can be accurately measured; the installation position of the sensor can be adjusted; the method can be used for matching and verifying the elastic coupling and the power transmission system and for selecting the elastic coupling.
Finally, it should be noted that: the above examples are intended only to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the embodiments of the disclosure or equivalent replacements of parts of the technical features may be made, which are all covered by the technical solution claimed by the disclosure.
Claims (13)
1. A torsional vibration testing apparatus for a drivetrain, comprising:
the fluted disc device comprises at least one detection fluted disc, the detection fluted disc comprises a fluted disc and a plurality of detection teeth which are integrally arranged on the periphery of the fluted disc and are uniformly arranged along the circumferential direction of the fluted disc, the detection fluted disc is configured to be connected in the power transmission system to replace corresponding transmission parts of the power transmission system during detection, the fluted disc comprises a connecting structure, and the connecting structure of the fluted disc is configured to be connected with the transmission parts which are connected with the replaced corresponding transmission parts in the power transmission system; and
a sensing device including at least one sensor disposed in correspondence with the at least one detecting cog, the sensor configured to cooperate with the corresponding detecting cog to acquire rotational information of the corresponding detecting cog;
and the control device (15) is in signal connection with the sensing device and is configured to receive the rotation information and calculate and output torsional vibration information of the power transmission system according to the rotation information.
2. The torsional vibration testing apparatus of a power transmission system according to claim 1,
the at least one detection fluted disc comprises a first detection fluted disc (11) and a second detection fluted disc (12) which are used for replacing two transmission parts at the two axial ends of a transmission part to be detected of the power transmission system, and the first detection fluted disc (11) and the second detection fluted disc (12) are configured to be respectively connected to the two axial ends of the transmission part to be detected of the power transmission system when being detected;
sensing device include with first sensor (13) that first detection fluted disc (11) corresponds the setting and with second sensor (14) that second detection fluted disc (12) corresponds the setting, the rotation information includes first sensor (13) acquire first rotation information of first detection fluted disc (11) with second sensor (14) acquire the second rotation information of second detection fluted disc (12).
3. The torsional vibration testing apparatus of a power train according to claim 2,
the transmission component to be detected is an elastic coupling (20) between an engine flywheel and a shaft coupling flange of the power transmission system,
the first detection fluted disc (11) is configured to replace the engine flywheel when detecting, and the connecting structure of the first detection fluted disc (11) comprises an engine connecting part used for being connected with an engine output shaft of the power transmission system and a first shaft connector connecting part used for being connected with the axial first end of the elastic coupling (20);
the second detection toothed disc (12) is configured to replace the coupling flange when detecting, the connecting structure of the second detection toothed disc (12) comprising a second coupling connecting portion (123) for connecting with an axial second end of the elastic coupling (20) and a drive shaft connecting portion (124) for connecting with a drive shaft (30) of the drivetrain.
4. The torsional vibration testing apparatus of a drivetrain according to claim 1, wherein the sensor is a magneto-electric sensor or a photoelectric sensor.
5. The torsional vibration testing apparatus of a powertrain system of claim 1, further comprising a mounting bracket (16), the mounting bracket (16) configured to support the sensor.
6. The torsional vibration test apparatus of a power train according to claim 5, wherein a mounting position of the sensor supported by the mounting bracket (16) is adjustably set.
7. The torsional vibration testing apparatus of a power train according to claim 6,
the mounting position of the mounting bracket (16) is adjustably set; and/or
The mounting bracket (16) comprises more than two mounting components, and the assembling positions of at least two of the more than two mounting components are adjustably arranged; and/or
The mounting position of the sensor on the mounting bracket (16) is adjustably set.
8. The torsional vibration testing apparatus of the drivetrain according to claim 7, wherein the mounting bracket (16) includes a mounting base (161), the mounting base (161) including a first elongated hole (1611) for securing the mounting bracket (16), the first elongated hole (1611) configured to cooperate with a bolt to secure the mounting base (161).
9. The torsional vibration testing apparatus of a power train according to claim 7, wherein the mounting bracket (16) includes two or more mounting assemblies, an assembly position of at least two mounting assemblies being adjustably set, the at least two mounting assemblies including:
a mounting base (161);
a sensor mount (162) including a sensor mounting portion, the sensor mount (162) being adjustably mounted in a mounting position on the mounting base (161).
10. The torsional vibration testing apparatus of a power transmission system according to claim 9, wherein the mounting bracket (16) includes:
a screw (163) passing through the mounting base (161) and the sensor mounting seat (162), wherein the length direction of the screw (163) is arranged at an angle to the extending direction of the first elongated hole (1611); and
a plurality of locking nuts (164) for locking the screw (163) to the mounting base (161) and the sensor mount (162).
11. The torsional vibration testing apparatus of a power train according to claim 9,
the mounting base (161) has a second elongated hole;
the sensor mounting base (162) is provided with a third strip hole arranged at an included angle with the second strip hole, and the sensor mounting base (162) is connected through a threaded connecting piece penetrating through the second strip hole and the third strip hole.
12. The torsional vibration testing apparatus of any one of claims 1 to 11, wherein the detecting chainring is configured to have the same rotational inertia as the respective transmission component of the drivetrain that is replaced.
13. The torsional vibration testing apparatus of the power transmission system according to any one of claims 1 to 11, wherein the connection structure of the wheel disc is configured to be identical to a connection structure of a corresponding transmission member that is replaced in the power transmission system for connection with a connected transmission member.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110549594.1A CN113125153A (en) | 2021-05-19 | 2021-05-19 | Torsional vibration testing device of power transmission system |
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| CN202110549594.1A CN113125153A (en) | 2021-05-19 | 2021-05-19 | Torsional vibration testing device of power transmission system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383714A (en) * | 2022-01-11 | 2022-04-22 | 襄阳达安汽车检测中心有限公司 | Testing device and testing method for measuring torsional vibration |
| CN116625478A (en) * | 2023-07-21 | 2023-08-22 | 同日智能科技(徐州)有限公司 | Vibration testing equipment for gear motor |
-
2021
- 2021-05-19 CN CN202110549594.1A patent/CN113125153A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114383714A (en) * | 2022-01-11 | 2022-04-22 | 襄阳达安汽车检测中心有限公司 | Testing device and testing method for measuring torsional vibration |
| CN114383714B (en) * | 2022-01-11 | 2023-03-14 | 襄阳达安汽车检测中心有限公司 | Testing device and testing method for measuring torsional vibration |
| CN116625478A (en) * | 2023-07-21 | 2023-08-22 | 同日智能科技(徐州)有限公司 | Vibration testing equipment for gear motor |
| CN116625478B (en) * | 2023-07-21 | 2023-11-07 | 同日智能科技(徐州)有限公司 | Vibration testing equipment for gear motor |
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