CN115031826A - Crankshaft torsional vibration measuring device, method, terminal device and readable storage medium - Google Patents
Crankshaft torsional vibration measuring device, method, terminal device and readable storage medium Download PDFInfo
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Abstract
The invention relates to the technical field of torsional vibration measurement, and discloses a crankshaft torsional vibration measuring device, a method, terminal equipment and a readable storage medium, wherein the measuring device comprises: the data measuring device is coaxially fixed with the crankshaft torsional vibration damper to measure and acquire linear acceleration data and convert the linear acceleration data into angular acceleration data; the signal receiving device is in wireless communication connection with the data measuring device and is used for wirelessly receiving angular acceleration data; and the data processing device is used for processing the angular acceleration data to obtain the torsional vibration of the crankshaft. According to the invention, the linear acceleration data is measured and converted into the angular acceleration data, so that the torsional vibration of the crankshaft is measured without measuring the rotating speed. In addition, the invention has small volume and low requirement on installation volume, and can be applied no matter whether the crankshaft system is completely packaged in the engine or not. The invention has lower manufacturing cost and stable and reliable work and can resist high-speed rotation of more than 6000 r/min.
Description
Technical Field
The invention relates to the technical field of torsional vibration measurement, in particular to a crankshaft torsional vibration measuring device, a crankshaft torsional vibration measuring method, terminal equipment and a readable storage medium.
Background
In the actual operation process of the engine, due to different power output moments of cylinders, periodic torsional vibration, namely torsional vibration, occurs between shaft sections of the crankshaft. If the torsional vibration frequency and the engine operation condition generate resonance, the torsional vibration amplitude may be increased, the abrasion of the transmission mechanism is accelerated, and even serious faults such as crankshaft breakage may be caused. Therefore, the torsional Vibration testing method has important significance for optimizing the matching of the engine shafting and improving the reliability of the engine crankshaft shafting and the performances of Noise, Vibration and Harshness (NVH).
At present, the torsional vibration of a crankshaft is measured and calculated by adopting a method of collecting the rotating speed of the crankshaft in an encoder mode, however, the running environment of an engine is complex, the size of the encoder is large, and for a part of special hybrid engine, because a crankshaft shaft system is completely packaged in the engine, sufficient installation space is not provided for installing the encoder; moreover, because the encoder comprises a stator and a rotor which have relative motion with high rotating speed, if the crankshaft of the engine vibrates excessively or the installation coaxiality is poor, errors and interference can be caused to a test result, and even test equipment can be damaged.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a crankshaft torsional vibration measurement apparatus, method, terminal device and readable storage medium, so as to solve the problems that the existing engine may not have enough space to install the encoder and the use of the encoder may cause errors and interference to the torsional vibration test result.
In order to achieve the purpose, the invention adopts the following technical scheme:
a first aspect of the present invention provides a crankshaft torsional vibration measuring apparatus, in which a crankshaft torsional vibration damper is mounted at a front end of a crankshaft, the crankshaft torsional vibration measuring apparatus comprising:
the data measuring device is coaxially fixed with the crankshaft torsional vibration damper to measure and acquire linear acceleration data and convert the linear acceleration data into angular acceleration data;
the signal receiving device is in wireless communication connection with the data measuring device and is used for wirelessly receiving angular acceleration data;
and the data processing device is used for processing the angular acceleration data to obtain the torsional vibration of the crankshaft.
Preferably, the data measuring device includes a first power supply module, an acceleration measuring module, a first data processing module and a first signal receiving and sending module, the first power supply module is used for providing a power supply, the acceleration measuring module is used for measuring linear acceleration, the first data processing module is used for converting the linear acceleration data into angular acceleration data, and the first signal receiving and sending module is used for wirelessly transmitting the angular acceleration data to the signal receiving device.
Preferably, the data measurement device further comprises a power conversion module, configured to convert a power voltage value provided by the first power supply module into a set threshold range.
Preferably, the signal receiving device includes a second power supply module and a second signal receiving and sending module, the second power supply module is configured to provide a power supply, and the second signal receiving and sending module is configured to wirelessly receive angular acceleration data and transmit the angular acceleration data to the data processing device.
Preferably, the crankshaft torsional vibration measuring device further comprises a display device, and the display device is connected with the data processing device to display the crankshaft torsional vibration data.
Preferably, the data processing device is built in the signal receiving device or the display device.
Preferably, the crankshaft torsional vibration damper is connected to the crankshaft by a first fastening bolt, and the data measuring device is fixed to the first fastening bolt.
Preferably, the first fastening bolt includes a bolt head and a screw, one side of the bolt head is fixed to the screw, and the other side of the bolt head is provided with a bolt hole for mounting the data measuring device.
Preferably, the crankshaft torsional vibration measuring device further comprises a second fastening bolt, and the data measuring device is fixed with the first fastening bolt by the second fastening bolt passing through the bolt hole.
A second aspect of the present invention provides a method for measuring torsional vibration of a crankshaft, including:
measuring and acquiring linear acceleration data of a data measuring device coaxially fixed with the crankshaft torsional vibration damper;
converting the linear acceleration data into angular acceleration data, and wirelessly transmitting the angular acceleration data to a signal receiving device;
wirelessly receiving angular acceleration data by using a signal receiving device;
and processing the angular acceleration data to obtain crankshaft torsional vibration.
A third aspect of the present invention provides a terminal device, comprising at least one processor and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a method of crankshaft torsional vibration measurement as described above.
A fourth aspect of the present invention is to provide a computer-readable storage medium storing a computer program which, when executed by a processor, implements the crankshaft torsional vibration measurement method as described above.
Compared with the prior art, the crankshaft torsional vibration measuring device, the crankshaft torsional vibration measuring method, the terminal equipment and the readable storage medium have the advantages that:
the crankshaft torsional vibration measuring device provided by the embodiment of the invention measures linear acceleration data and converts the linear acceleration data into angular acceleration data, so that the crankshaft torsional vibration is measured without measuring the rotating speed. In addition, the invention has small volume and low requirement on installation volume, and can be applied no matter whether the crankshaft system is completely packaged in the engine or not.
The invention has the advantages of lower manufacturing cost, simple use, stable and reliable work, capability of enduring high-speed rotation of more than 6000r/min, smaller volume and weight, convenient installation, no influence on a rotating part system, and capability of realizing the measurement of the crankshaft torsional vibration of any working condition of the engine without carrying out complicated transformation on engine parts.
The invention adopts a wireless signal transmission mode to transmit the measurement result, and the engine is not required to be processed to lead out a cable, thereby improving the reliability of the system.
Drawings
FIG. 1 is a schematic structural diagram of a crankshaft torsional vibration measuring apparatus according to an embodiment of the present invention;
FIG. 2 is an exploded view of a crankshaft torsional vibration measurement apparatus according to an embodiment of the present invention;
FIG. 3 is a block diagram showing the structure of a data measuring apparatus according to an embodiment of the present invention;
fig. 4 is a block diagram showing the structure of a signal receiving apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic flow chart of a method for measuring torsional vibration of a crankshaft according to an embodiment of the present invention;
in the figure, 1, crankshaft; 2. a crankshaft torsional vibration damper;
10. a data measuring device; 11. a first power supply module; 12. an acceleration measurement module; 13. a first data processing module; 14. a first signal receiving and sending module; 15. a power conversion module; 20. a signal receiving device; 21. a second power supply module; 22. a second signaling module; 23. a communication module; 30. a display device; 40. a first fastening bolt; 50. and a second fastening bolt.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1 and 2, a crankshaft torsional damper 2 is mounted to a front end of the crankshaft 1 to damp torsional vibration of the crankshaft 1. The crankshaft torsional vibration measuring device of the preferred embodiment of the invention comprises a data measuring device 10, a signal receiving device 20 and a data processing device, wherein the data measuring device 10 is coaxially fixed with the crankshaft torsional vibration damper 2 to measure and obtain linear acceleration data of the data measuring device 10 and convert the linear acceleration data into angular acceleration data; the signal receiving device 20 is in wireless communication connection with the data measuring device 10, receives angular acceleration data wirelessly, and transmits a measuring result in a wireless signal transmission mode without processing an engine to lead out a cable, so that the reliability of the system is improved; the data processing device is used for processing the angular acceleration data to obtain the torsional vibration of the crankshaft. Because the data measuring device 10, the crankshaft torsional vibration damper 2 and the crankshaft 1 are coaxially fixed and can synchronously rotate, the angular acceleration data obtained by converting the linear acceleration data of the data measuring device 10 is the angular acceleration data of a crankshaft shaft system, and the crankshaft torsional vibration can be obtained according to the angular acceleration data.
The method can realize the measurement of the torsional vibration of the crankshaft by measuring the linear acceleration and converting the linear acceleration into the angular acceleration without measuring the rotating speed by using an encoder, a magnetoelectric sensor and the like; the rotary part system has the advantages of low manufacturing cost, simplicity in use, stability and reliability in working, capability of enduring high-speed rotation of more than 6000r/min, small volume and weight, convenience in installation, no influence on the rotary part system, and no need of carrying out complex transformation on engine parts.
As shown in fig. 1 and 2, the crankshaft torsional damper 2 is connected to the crankshaft 1 by a first fastening bolt 40, and the data measuring device 10 is fixed to the first fastening bolt 40. The first fastening bolt 40 is attached to the central axis of the crankshaft 1, and fixes the crankshaft torsional damper 2 and the crankshaft 1 coaxially. Preferably, as shown in fig. 2, the first fastening bolt 40 includes a bolt head and a screw rod, one side of the bolt head is fixed with the screw rod, and the other side of the bolt head is provided with a bolt hole for installing the data measuring device 10, wherein one side and the other side of the bolt head are perpendicular to the central axis. In the embodiment, the screw rod is cylindrical and is provided with an external thread; the bolt head is in an external hexagon shape; the contact position of the screw rod and the bolt head is provided with a backing plate, the backing plate is circular, the diameter of the backing plate is larger than the diameter of an outer circle of the bolt head, and the backing plate is clamped on the crankshaft torsion damper 2 during installation.
Further, the crankshaft torsional vibration measuring apparatus further includes a second fastening bolt 50, and the data measuring apparatus 10 is fixed to the first fastening bolt 40 by the second fastening bolt 50 passing through the bolt hole, so that the data measuring apparatus 10 is stably mounted on the crankshaft torsional vibration damper 2.
In this embodiment, the data measuring device 10 is circular, has a diameter slightly larger than the diameter of the circumscribed circle of the bolt head, has bolt holes on the surface, and is fixed to the first fastening bolts 40 by four second fastening bolts 50. In other embodiments, the data measurement device 10 may also take on other shapes, such as rectangular or oval.
As shown in fig. 3, the data measurement apparatus 10 includes a first power supply module 11, an acceleration measurement module 12, a first data processing module 13, and a first signaling module 14, where the first power supply module 11 is used to provide power, and may be a battery or a wireless charging power supply module; the acceleration measurement module 12 is used for measuring linear acceleration, and may be an acceleration sensor, and the measured linear acceleration is the linear acceleration at the position where the acceleration measurement module 12 is located; the first data processing module 13 is configured to convert linear acceleration data into angular acceleration data; the first signaling module 14 is used for wirelessly transmitting angular acceleration data to the signal receiving device 20. Specifically, the linear acceleration data is converted into angular acceleration data by using a ═ r × α, where a denotes the linear acceleration, α denotes the angular acceleration, and r denotes the rotation radius of the acceleration measurement module 12.
Further, the data measuring apparatus 10 further includes a power conversion module 15, configured to convert a power voltage value provided by the first power supply module 11 into a set threshold range, so as to avoid that the power voltage is too high or too low.
As shown in fig. 4, the signal receiving device 20 includes a second power supply module 21 and a second signaling module 22, where the second power supply module 21 is configured to provide power, and the second signaling module 22 is configured to wirelessly receive angular acceleration data and transmit the angular acceleration data to the data processing device. In this embodiment, the shape of the signal receiving device 20 is a square, and in other embodiments, the shape of the signal receiving device 20 may be set to other shapes according to requirements.
In the present invention, the first signaling module 14 and the second signaling module 22 are both wireless signaling modules, and transmit data wirelessly. In the present invention, the signal receiving device 20 can be installed at any position where it can receive and transmit wireless signals, and can transmit data to a computer terminal through a transmission line.
Preferably, the crankshaft torsional vibration measuring device further comprises a display device 30, and the display device 30 is connected with the data processing device to display the crankshaft torsional vibration data. In this embodiment, the display device 30 is a computer terminal.
In this embodiment, the data processing device is built in the signal receiving device 20, and processes angular acceleration data. Further, the signal receiving device 20 further includes a communication module 23, and the communication module 23 is configured to communicate with the display device 30 to transmit the processing result of the data processing device to the display device 30 for displaying. The signal receiving device 20 may have a transmission line and a USB interface to facilitate connection with a computer terminal.
In another embodiment, the data processing device may be built in the display device 30, and the display device 30 receives the angular acceleration data transmitted by the signal receiving device 20, processes the angular acceleration data by the data processing device, and displays the processing result.
It should be noted that, in the present invention, the way that the data processing device processes the angular acceleration data to obtain the torsional vibration of the crankshaft is the prior art, for example, the torsional vibration data of each order of the crankshaft of the engine is obtained through Fast Fourier Transform (FFT) analysis, and details of the present invention are not repeated.
When the crankshaft torsional vibration measuring device is used for crankshaft torsional vibration measurement, the mounting bolt of the crankshaft torsional vibration damper 2 is replaced by the first fastening bolt 40, and the data measuring device 10 is mounted on the first fastening bolt 40, so that the data measuring device 10, the crankshaft torsional vibration damper 2 and the crankshaft 1 rotate synchronously. Turning on the power supply of the measuring device to ensure that the data measuring device 10 and the signal receiving device 20 are in normal communication; starting the engine to a working condition to be measured, and starting crankshaft torsional vibration measurement; measuring linear acceleration data by using a data measuring device 10, and converting the linear acceleration data into angular acceleration data; and processing the angular acceleration data by using a data processing device to obtain crankshaft torsional vibration and finish the measurement of the crankshaft torsional vibration.
As shown in fig. 5, the method for measuring torsional vibration of a crankshaft of the present invention includes the following steps:
step S1, linear acceleration data of the data measuring device 10 which is coaxially fixed with the crankshaft torsional vibration damper 2 is measured and obtained, wherein the crankshaft torsional vibration damper 2 is arranged at the front end of the crankshaft 1;
step S2, converting the linear acceleration data into angular acceleration data, and wirelessly transmitting the angular acceleration data to the signal receiving device 20;
step S3, wirelessly receiving angular acceleration data by the signal receiving device 20;
and step S4, processing the angular acceleration data to obtain crankshaft torsional vibration. Because the data measuring device 10, the crankshaft torsional vibration damper 2 and the crankshaft 1 are coaxially fixed and can synchronously rotate, the angular acceleration data obtained by converting the linear acceleration data of the data measuring device 10 is the angular acceleration data of a crankshaft shaft system, and the torsional vibration of the crankshaft 1 can be obtained according to the angular acceleration data.
The invention adopts a wireless signal transmission mode to transmit the measurement result, and the engine is not required to be processed to lead out a cable, thereby improving the reliability of the system. The method can realize the measurement of the torsional vibration of the crankshaft by measuring the linear acceleration and converting the linear acceleration into the angular acceleration without measuring the rotating speed by using an encoder, a magnetoelectric sensor and the like; the rotary part system has the advantages of low manufacturing cost, simplicity in use, stability and reliability in working, capability of enduring high-speed rotation of more than 6000r/min, small volume and weight, convenience in installation, no influence on the rotary part system, and no need of carrying out complex transformation on engine parts.
Preferably, in the step S1, the linear acceleration data is measured by the acceleration measuring module 12 in the data measuring device 10, wherein the acceleration measuring module 12 may be an acceleration sensor.
Preferably, in step S2, the linear acceleration data is converted into angular acceleration data by using the following formula, where a denotes linear acceleration, α denotes angular acceleration, and r denotes a rotation radius of the acceleration measuring module 12.
Preferably, the crankshaft torsional vibration measuring method further includes step S5 of displaying the crankshaft torsional vibration data by using the display device 30. The display device 30 may be a computer terminal.
In step S4, the step of processing the angular acceleration data may be performed in the signal receiving device 20, and the signal receiving device 20 may transmit the processed crankshaft torsional vibration data to the display device 30 for display. Alternatively, the step of processing the angular acceleration data is performed in the display device 30, and the received angular acceleration data is transmitted to the display device 30 by the signal receiving device 20, and the crankshaft torsional vibration data is obtained by processing and displayed.
It should be noted that the specific embodiment of the crankshaft torsional vibration measuring method of the present invention is substantially the same as the specific embodiment of the crankshaft torsional vibration measuring apparatus, and the crankshaft torsional vibration measuring apparatus can be used to measure the crankshaft torsional vibration, which is not described herein again.
The terminal device comprises at least one processor, and a memory connected to the at least one processor in a communication manner, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the crankshaft torsional vibration measurement method as follows:
step S1, linear acceleration data of the data measuring device 10 which is coaxially fixed with the crankshaft torsional vibration damper 2 is measured and obtained;
step S2, converting the linear acceleration data into angular acceleration data, and wirelessly transmitting the angular acceleration data to the signal receiving device 20;
step S3, wirelessly receiving angular acceleration data by the signal receiving device 20;
step S4, the angular acceleration data is processed to obtain crankshaft torsional vibrations.
Wherein the memory comprises at least one type of readable storage medium, the readable storage medium comprises flash memory, a removable hard disk, a card type memory (e.g., SD or DX memory, etc.), a magnetic disk, an optical disk, etc. The memory may in some embodiments be an internal storage unit of the terminal device, e.g. a removable hard disk of the terminal device. The memory may also be an external storage device of the terminal device in other embodiments, such as a plug-in mobile hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the terminal device. Further, the memory may also include both an internal storage unit of the terminal device and an external storage device. The memory may be used not only to store application software installed in the terminal device and various types of data such as codes of a control program for crankshaft torsional vibration measurement, etc., but also to temporarily store data that has been output or is to be output.
The processor may in some embodiments be formed by an integrated circuit, for example, a single packaged integrated circuit, or may be formed by a plurality of integrated circuits packaged with the same or different functions, including one or more Central Processing Units (CPUs), microprocessors, and the like. The processor executes various functions of the terminal device and processes data by executing programs stored in the memory and calling data stored in the memory.
It should be noted that, in the present invention, the terminal device may further include a power module, a user interface, a network interface, and the like, so as to establish a communication connection with other terminal devices, which is not described herein again. Wherein the user interface may be a display, a keyboard, etc., and the network interface may be a wired interface or a wireless interface.
It should be noted that the embodiment of the terminal device of the present invention is substantially the same as the embodiment of the crankshaft torsional vibration measuring method, and the details are not repeated herein.
The computer-readable storage medium of the present invention stores a computer program, which when executed by a processor implements the crankshaft torsional vibration measurement method as described above.
It should be noted that the embodiments of the computer-readable storage medium of the present invention are substantially the same as the embodiments of the aforementioned crankshaft torsional vibration measurement apparatus, method, and terminal device, and are not repeated herein.
To sum up, embodiments of the present invention provide a crankshaft torsional vibration measurement apparatus, a crankshaft torsional vibration measurement method, a terminal device, and a readable storage medium, which implement measurement of crankshaft torsional vibration by measuring linear acceleration data and converting the linear acceleration data into angular acceleration data, without measuring a rotation speed. The invention adopts a wireless signal transmission mode to transmit the measurement result, and the engine does not need to be processed to lead out a cable, thereby improving the reliability of the system. The invention has the advantages of lower manufacturing cost, simple use, stable and reliable work, capability of enduring high-speed rotation of more than 6000r/min, smaller volume and weight, convenient installation, no influence on a rotating part system, and capability of realizing the measurement of the crankshaft torsional vibration of any working condition of the engine without carrying out complicated transformation on engine parts.
The invention has small volume and low requirement on installation volume, and can be applied no matter whether the crankshaft is completely packaged in an engine or not. The method can be used for the processes of NVH test of the engine, evaluation of the development effect of the crankshaft shafting of the engine, optimization of matching of the crankshaft torsional vibration damper 2 and the like, and can be used for carrying out torsional vibration measurement without additional processing on the engine even if the crankshaft shafting is completely packaged in the engine.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (12)
1. The utility model provides a bent axle torsional vibration measuring device, bent axle torsional vibration damper is installed to the front end of bent axle, its characterized in that, bent axle torsional vibration measuring device includes:
the data measuring device is coaxially fixed with the crankshaft torsional vibration damper to measure and acquire linear acceleration data and convert the linear acceleration data into angular acceleration data;
the signal receiving device is in wireless communication connection with the data measuring device and is used for wirelessly receiving angular acceleration data;
and the data processing device is used for processing the angular acceleration data to obtain the torsional vibration of the crankshaft.
2. The crankshaft torsional vibration measuring device of claim 1, wherein the data measuring device comprises a first power supply module, an acceleration measuring module, a first data processing module and a first signal receiving and sending module, the first power supply module is used for providing power, the acceleration measuring module is used for measuring linear acceleration, the first data processing module is used for converting linear acceleration data into angular acceleration data, and the first signal receiving and sending module is used for wirelessly transmitting the angular acceleration data to the signal receiving device.
3. The crankshaft torsional vibration measuring apparatus of claim 2, wherein the data measuring apparatus further comprises a power conversion module for converting a power voltage value provided by the first power supply module into a set threshold range.
4. The crankshaft torsional vibration measuring device of claim 1, wherein the signal receiving device comprises a second power supply module and a second signal receiving and sending module, the second power supply module is used for providing power, and the second signal receiving and sending module is used for wirelessly receiving angular acceleration data and transmitting the angular acceleration data to the data processing device.
5. A crankshaft torsional vibration measuring device of claim 1, further comprising a display device coupled to the data processing device to display crankshaft torsional vibration data.
6. A crankshaft torsional vibration measuring apparatus as claimed in claim 5, wherein said data processing means is built in said signal receiving means or said display means.
7. The crankshaft torsional vibration measuring device of claim 1, wherein the crankshaft torsional vibration damper is coupled to the crankshaft by a first fastening bolt, and the data measuring device is fixed to the first fastening bolt.
8. The crankshaft torsional vibration measuring apparatus of claim 7, wherein the first fastening bolt includes a bolt head and a screw, one side of the bolt head is fixed with the screw, and the other side of the bolt head is provided with a bolt hole for mounting the data measuring apparatus.
9. The crankshaft torsional vibration measuring device of claim 8, further comprising a second fastening bolt, wherein the data measuring device is fixed to the first fastening bolt by the second fastening bolt passing through the bolt hole.
10. A method of measuring crankshaft torsional vibration, comprising:
measuring and acquiring linear acceleration data of a data measuring device coaxially fixed with the crankshaft torsional vibration damper;
converting the linear acceleration data into angular acceleration data, and wirelessly transmitting the angular acceleration data to a signal receiving device;
wirelessly receiving angular acceleration data by using a signal receiving device;
and processing the angular acceleration data to obtain crankshaft torsional vibration.
11. A terminal device, characterized in that the terminal device comprises:
at least one processor and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of crankshaft torsional vibration measurement of claim 10.
12. A computer-readable storage medium, storing a computer program, wherein the computer program, when executed by a processor, implements the crankshaft torsional vibration measurement method of claim 10.
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