Test device for a rotating shaft and engine assembly

Abstract

The application discloses a rotating shaft testing device and an engine assembly. The testing device comprises a shell, a connecting shaft, a rotating speed detecting member and a vibration detecting member. An accommodating cavity is formed in the interior of the shell. At least part of the connecting shaft is accommodated in the accommodating cavity. The connecting shaft is used for connecting with the rotating shaft. The rotating speed detecting member is arranged in the accommodating cavity and is used for detecting the rotating speed fluctuation of the connecting shaft. The vibration detecting member is arranged on the connecting shaft and / or the shell and is used for measuring the vibration of the rotating shaft in the plane perpendicular to the connecting shaft and / or in the extension direction of the connecting shaft. The simultaneous measurement of the flat vibration and the torsional vibration can be realized, and the completeness of the measurement is improved.

Description

Technical Field

[0001] This application relates to the field of testing equipment technology, and in particular to a testing device for a rotating shaft and an engine assembly. Background Technology

[0002] In related technologies, conventional crankshaft-camshaft system vibration testing mainly uses electromagnetic pulse signals or encoders for measurement. The output results only show the torsional vibration of the system and cannot obtain the translational vibration information. Under bench conditions, a non-contact laser vibrometer can be used to measure the translational vibration of the crankshaft section bolts in the axial direction. However, due to the large size of the laser vibrometer and the limitation of the non-contact measurement principle, it is not possible to effectively obtain real-time data of the three-dimensional translational vibration of the running shaft system simultaneously. Therefore, it is still not possible to perform this test under vehicle conditions. Thus, how to achieve simultaneous measurement of translational and torsional vibration and improve the completeness of the measurement has become the technical problem to be solved in this application. Utility Model Content

[0003] This application aims to at least address one of the technical problems existing in the prior art. To this end, one objective of this application is to provide a testing device for a rotating shaft that can simultaneously measure transverse and torsional vibrations, thereby improving the completeness of the measurement.

[0004] This application proposes an engine assembly with a test device having a rotating shaft.

[0005] A testing device according to an embodiment of this application includes: a housing having a receiving cavity formed inside; a connecting shaft having at least a portion therein received in the receiving cavity, the connecting shaft being used to connect to a rotating shaft; a rotational speed detection element disposed within the receiving cavity and used to detect rotational speed fluctuations of the connecting shaft; and a vibration detection element disposed on the connecting shaft and / or the housing and used to measure the vibration of the rotating shaft in a plane perpendicular to the connecting shaft and / or in the extending direction of the connecting shaft.

[0006] According to an embodiment of this application, a testing device is provided by setting a rotation speed detection device and a vibration detection device. The rotation speed detection device is connected to a rotating shaft via a connecting shaft. The rotation speed detection device captures the rotation speed fluctuation of the connecting shaft to obtain the torsional vibration of the rotating shaft. The vibration detection device is connected to the connecting shaft and / or to the housing. When the rotating shaft experiences horizontal vibration, the connecting shaft and / or the housing will also generate corresponding vibrations along with the rotating shaft and be detected by the vibration detection device to obtain the axial horizontal vibration information of the rotating shaft. The rotation speed detection device is responsible for torsional vibration measurement, and the vibration detection device is responsible for horizontal vibration measurement. The rotation speed detection device and the vibration detection device work simultaneously based on the same device structure connected to the rotating shaft. The two have little influence on each other and cooperate with each other, which can realize the simultaneous measurement of horizontal vibration and torsional vibration, avoiding the problem of incomplete vibration condition assessment caused by measuring only a single vibration mode.

[0007] According to some embodiments of the present application, the test apparatus further includes a measuring disk, which is housed within the receiving cavity. The center of the measuring disk is connected to the connecting shaft. A plurality of grating holes are formed on the measuring disk at circumferential intervals. The measuring disk measures the rotational speed fluctuation of the connecting shaft based on the grating holes.

[0008] According to some embodiments of the present application, the test apparatus includes a housing comprising a first wall and a second wall, the first wall and the second wall being spaced apart from each other, the first wall having an opening suitable for the connecting shaft to pass through, and the second wall having the vibration detection element disposed thereon; and a peripheral wall connecting the edge of the first wall and the edge of the second wall to enclose the space between the first wall and the second wall and form the receiving cavity.

[0009] According to some embodiments of the present application, the test apparatus includes a rotational speed detection element comprising: a transmitting part disposed on one of the first wall and the second wall, and the transmitting part being directly opposite at least a portion of the grating aperture, the transmitting part being used to transmit an optical signal; and a receiving part disposed on the other of the first wall and the second wall, and the receiving part being directly opposite at least a portion of the transmitting part, the receiving part being used to receive the optical signal modulated by the grating aperture to obtain the rotational speed fluctuation of the connecting shaft.

[0010] The testing apparatus according to some embodiments of this application further includes a bearing disposed on the outer periphery of the connecting shaft and supported by the opening.

[0011] According to some embodiments of the test apparatus of this application, the vibration detection element is disposed on the side of the second wall away from the receiving cavity, and the vibration detection element is coaxially disposed with the connecting shaft.

[0012] The testing apparatus according to some embodiments of this application further includes a signal transmission line, one end of which is connected to the vibration detection element and the rotational speed detection element respectively, and the other end of which is adapted to be connected to a processing device.

[0013] The testing apparatus according to some embodiments of this application further includes a connector, one end of which has a first connecting portion, and the axis of the connecting shaft has a first mating portion that mates with the first connecting portion, the first connecting portion and the first mating portion being detachably connected; the other end of the connector has a second connecting portion, and the axis of the rotating shaft has a second mating portion that mates with the second connecting portion, the second connecting portion and the second mating portion being detachably connected.

[0014] According to some embodiments of the test apparatus of this application, the connector is constructed as a double-ended bolt, and bolt holes adapted to the double-ended bolt are respectively provided on the axis of the connecting shaft and the axis of the rotating shaft.

[0015] The engine assembly according to an embodiment of this application is briefly described below.

[0016] The engine assembly according to the embodiments of this application includes an engine and a testing device. The engine is provided with an output shaft. The testing device is constructed as described in any of the above embodiments and is connected to the output shaft. Therefore, the engine assembly according to this application can achieve three-dimensional vibration measurement through the detection device, avoiding misjudgment of faults due to missed vibration types and improving the accuracy of engine fault detection. At the same time, the vibration characteristics of the engine output shaft affect the NVH performance of the entire vehicle. The torsional vibration and transverse vibration data provided by the testing device can supplement more vibration data, avoiding the increase in time cost caused by single-parameter measurement and the operating condition error caused by multiple single-parameter measurements, and improving the optimization efficiency of engine performance.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a side view of the test apparatus according to an embodiment of this application;

[0020] Figure 2 for Figure 1 A schematic diagram of the AA cross-sectional structure in the diagram;

[0021] Figure 3 for Figure 1 Schematic diagram of the BB cross-sectional structure in the middle;

[0022] Figure 4 This is a cross-sectional structural diagram of the test device and the rotating shaft according to an embodiment of this application.

[0023] Figure label:

[0024] 100. Testing equipment;

[0025] 11. Shell; 111. First wall; 1111. Opening; 112. Second wall; 113. Peripheral wall;

[0026] 12. Rotational speed detection element; 121. Measuring disc; 122. Grating aperture;

[0027] 13. Connecting shaft; 131. First mating part;

[0028] 2. Vibration testing components;

[0029] 3. Bearings;

[0030] 4. Signal transmission line;

[0031] 5. Connector; 51. First connecting part; 52. Second connecting part;

[0032] 6. Rotating shaft; 61. Second mating part. Detailed Implementation

[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0034] The following is for reference. Figures 1-4 A test apparatus 100 according to an embodiment of this application is described.

[0035] A testing device 100 according to an embodiment of this application includes a housing 11, a connecting shaft 13, a rotational speed detection element 12, and a vibration detection element 2. The housing 11 has an internal cavity, at least a portion of the connecting shaft 13 is housed in the cavity, the connecting shaft is used to connect to a rotating shaft 6, the rotational speed detection element 12 is disposed in the cavity and is used to detect the rotational speed fluctuation of the connecting shaft 13, and the vibration detection element 2 is disposed on the connecting shaft 13 and is used to measure the vibration of the rotating shaft 6 in a plane perpendicular to the connecting shaft 13 and / or in the extending direction of the connecting shaft 13.

[0036] It should be noted that during the rotation of the rotating shaft 6, the torsional vibration of the shaft system will cause the shaft speed to fluctuate. When the shaft system experiences torsional vibration, the rotational speed of the shaft system is no longer uniform and stable, but fluctuates within a certain range. Therefore, by measuring the fluctuation of the shaft speed, the torsional vibration state of the shaft system can be inferred.

[0037] According to a test device 100 of this application embodiment, a rotation speed detection element 12 is connected to a rotating shaft 6 via a connecting shaft 13, so that the rotational state of the rotating shaft 6 is directly transmitted to the connecting shaft 13. The rotation speed detection element 12 can capture the rotation speed fluctuation of the connecting shaft 13. Based on the correlation between torsional vibration and rotation speed fluctuation, the torsional vibration of the rotating shaft 6 can be calculated and analyzed. When the rotating shaft 6 experiences horizontal vibration, since the vibration detection element 2 is connected to the rotating shaft 6 via the connecting shaft 13, and / or the vibration detection element 2 is connected to the rotating shaft 6 via the housing 11, the connecting shaft 13 and / or the housing 11 will also generate corresponding vibration. The vibration detection element 2 can measure the vibration in the plane perpendicular to the connecting shaft 13, so that the vibration detection element 2 can detect the horizontal horizontal vibration of the rotating shaft 6 in the horizontal and vertical directions. At the same time, the vibration detection element 2 can also measure the vibration in the extension direction of the connecting shaft 13, thereby obtaining the axial horizontal vibration information of the shaft system and realizing the measurement of the three-dimensional horizontal vibration of the rotating shaft 6.

[0038] The rotational speed detection element 12 and the vibration detection element 2 work simultaneously based on the same device structure connected to the rotating shaft 6. This allows for simultaneous measurement of both transverse and torsional vibrations, avoiding the problem of only being able to acquire torsional vibration information. It enables a comprehensive and accurate assessment of the vibration status of the rotating shaft 6. Through simultaneous measurement, it is possible to obtain complete vibration data of the rotating shaft 6, capture complex vibration phenomena, improve the integrity of the measurement, and provide comprehensive data support for subsequent assessment and analysis of the shaft system vibration status.

[0039] According to some embodiments of the present application, the testing apparatus 100 includes a connecting shaft 13 rotatably disposed on the housing 11, with at least a portion of the connecting shaft 13 housed in the receiving cavity, the connecting shaft 13 rotating relative to the housing 11; a rotational speed detection element 12 is used to detect the relative rotation of the connecting shaft 13 and the housing 11 to obtain the rotational speed fluctuation; wherein the vibration detection element 2 is connected to the housing 11 and is used to measure the vibration of the housing 11 in a plane perpendicular to the connecting shaft 13 and / or in the extending direction of the connecting shaft 13.

[0040] Connecting shaft 13 is connected to rotating shaft 6. When rotating shaft 6 rotates, connecting shaft 13 rotates accordingly. Connecting shaft 13 is rotatably mounted on housing 11 and rotates relative to housing 11. Speed ​​detection element 12 is disposed in the receiving cavity to detect the relative rotation between connecting shaft 13 and housing 11. Due to torsional vibration, the speed fluctuation of connecting shaft 13 changes the relative rotation between connecting shaft 13 and housing 11. Speed ​​detection element 12 can capture the change in relative rotation, thereby obtaining speed fluctuation information of connecting shaft 13. Based on the correlation between speed fluctuation and torsional vibration, the torsional vibration of rotating shaft 6 can be measured, enabling the acquisition of torsional vibration information of the shaft system. This provides data support for analyzing the torsional vibration characteristics of the rotating shaft system and evaluating the impact of torsional vibration on the operation of rotating shaft 6. It helps to detect potential problems related to torsional vibration in advance, such as crankshaft fatigue damage, and thus take corresponding measures for optimization and improvement.

[0041] When the rotating shaft 6 rotates and generates transverse vibration, this vibration is transmitted to the housing 11 via the connecting shaft 13. Since the connecting shaft 13 is connected to the rotating shaft 6, and the housing 11 is mechanically connected to the connecting shaft 13, the transverse vibration of the rotating shaft 6 will cause the housing 11 to vibrate as well. Therefore, by measuring the vibration of the housing 11, the transverse vibration information of the rotating shaft 6 can be indirectly obtained. Vibration measurement in a plane perpendicular to the connecting shaft 13 can reflect the transverse transverse vibration of the shaft system, while vibration measurement in the extension direction of the connecting shaft 13 can reflect the axial transverse vibration of the shaft system, thus enabling the measurement of the transverse vibration information of the shaft system.

[0042] Furthermore, the rotational speed detection element 12 is responsible for measuring the rotational speed fluctuation of the shaft system to obtain torsional vibration information, and the vibration detection element 2 is responsible for measuring the vibration of the housing 11 to obtain transverse vibration information. These two measurement functions are integrated into the same device, and based on the connection relationship between the connecting shaft 13 and the rotating shaft 6, the measurements can be performed synchronously during the operation of the rotating shaft 6.

[0043] According to some embodiments of the present application, the test apparatus 100 includes a rotational speed detection element 12, which is further comprising a measuring disk 121. The measuring disk 121 is housed in a receiving cavity, and the center of the measuring disk 121 is coaxially connected to the connecting shaft 13. A plurality of grating holes 122 are formed on the measuring disk 121 at circumferential intervals. The rotational speed detection element 12 measures the rotational speed fluctuation of the connecting shaft 13 according to the grating holes 122.

[0044] When the rotating shaft 6 rotates, the connecting shaft 13 drives the connected measuring disk 121 to rotate synchronously. Multiple grating holes 122 are arranged circumferentially on the measuring disk 121. When the speed detection element 12 detects these grating holes 122, the speed detection element 12 will generate a signal change every time it passes through a grating hole 122. Because the grating holes 122 are evenly spaced circumferentially, the rotational speed change of the measuring disk 121 can be accurately calculated based on the change in the number of grating holes 122 detected per unit time, thereby obtaining the rotational speed fluctuation of the connecting shaft 13. Through the grating holes 122, every time the measuring disk 121 rotates a certain angle, one grating hole 122 passes through the speed detection element 12, generating a signal identifier. This discrete yet regular signal output allows the speed detection element 12 to more accurately capture minute changes in the rotational speed of the measuring disk 121. The speed detection element 12 can quickly and accurately reflect the rotational speed fluctuation of the connecting shaft 13 through changes in the grating hole 122 signal, because even a small change in rotational speed will result in a corresponding change in the number of grating holes 122 passing through the speed detection element 12 per unit time, thus achieving high-precision rotational speed fluctuation detection. Furthermore, the measuring disk 121 is housed within a receiving cavity and connected to the center of the connecting shaft 13. This design makes the structure of the testing device 100 more compact and the layout of the various components more rational. Since the measuring disk 121 is directly connected to the connecting shaft 13 and located inside the receiving cavity, the interference of external factors on the measurement process is reduced, and the overall stability of the device is also improved.

[0045] In some embodiments of this application, the speed detection element 12 is integrated into the connecting shaft 13 to reduce the space occupied by the speed detection element 12.

[0046] According to some embodiments of the present application, the test apparatus 100 has a housing 11 including a first wall 111 and a second wall 112, the first wall 111 and the second wall 112 being spaced apart from each other, the first wall 111 having an opening 1111 suitable for the connecting shaft 13 to pass through, and the second wall 112 having a vibration detection element 2; and a peripheral wall 113, which is connected between the edge of the first wall 111 and the edge of the second wall 112 to close the space between the first wall 111 and the second wall 112 and form a receiving cavity.

[0047] The peripheral wall 113 connects the edge of the first wall 111 and the edge of the second wall 112, enclosing the space between the first wall 111 and the second wall 112 and forming a receiving cavity. This enclosed receiving cavity provides a relatively independent and stable working environment for the measuring disk 121, the speed detection element 12, etc., avoiding the problems of high temperature, oil, dust, etc. entering the receiving cavity, which would affect the rotation accuracy of the measuring disk 121, damage the internal components such as the speed detection element 12, and thus lead to inaccurate measurement results or even device failure.

[0048] According to some embodiments of the present application, the test apparatus 100 includes a rotational speed detection element 12 comprising: a transmitting part disposed on one of the first wall 111 and the second wall 112, and the transmitting part being directly opposite at least a portion of the grating aperture 122, the transmitting part being used to transmit an optical signal; and a receiving part disposed on the other of the first wall 111 and the second wall 112, and the receiving part being directly opposite at least a portion of the transmitting part, the receiving part being used to receive the optical signal modulated by the grating aperture 122 to obtain the rotational speed fluctuation of the connecting shaft 13.

[0049] The transmitting unit is located on one of the first wall 111 and the second wall 112, at least partially opposite the grating aperture 122, and is responsible for emitting optical signals. When the measuring disk 121 rotates with the connecting shaft 13, the grating aperture 122 sequentially passes through the area where the transmitting unit emits optical signals. The optical signals are modulated as they pass through the grating aperture 122, forming periodic changes in the optical signal. The receiving unit is located on the other of the first wall 111 and the second wall 112, at least partially opposite the transmitting unit, and is used to receive the optical signals modulated by the grating aperture 122. Since the grating apertures 122 are circumferentially spaced on the measuring disk 121, and the measuring disk 121 rotates with the connecting shaft 13, the change in the rotational speed of the connecting shaft 13 directly causes a change in the number of times the optical signals are modulated through the grating aperture 122 per unit time. The receiving unit receives these modulated optical signals, and by analyzing the frequency of the optical signal changes, it can accurately obtain the rotational speed fluctuations of the connecting shaft 13. If the rotational speed of the connecting shaft 13 increases, the number of times the grating aperture 122 passes through the transmitting part per unit time increases, and the frequency of the light signal change received by the receiving part will increase; conversely, if the rotational speed decreases, the frequency of the light signal change decreases. By setting the transmitting part and the receiving part on the first wall 111 and the second wall 112 respectively, and integrating them together with the measuring disk 121, connecting shaft 13 and other components in the receiving cavity, a compact rotational speed measuring unit is formed, which makes full use of the internal space of the housing 11 and reduces the overall volume and complexity of the device.

[0050] The test apparatus 100 according to some embodiments of this application further includes a bearing 3, which is disposed on the outer periphery of the connecting shaft 13 and supported by the opening 1111.

[0051] Bearing 3 is disposed on the outer periphery of connecting shaft 13 and supported in opening 1111. Its function is to provide stable and low-friction support for connecting shaft 13. When connecting shaft 13 rotates, the inner ring of bearing 3 is tightly fitted with connecting shaft 13 and rotates with connecting shaft 13, while the outer ring is fixed at opening 1111. Through the rolling of the internal rolling elements, the frictional resistance between connecting shaft 13 and opening 1111 is reduced. By setting bearing 3, connecting shaft 13 can rotate more smoothly, reducing speed fluctuation interference caused by friction and shaking, and avoiding incorrect speed fluctuation data obtained by speed detection element 12 due to unstable rotation of connecting shaft 13.

[0052] It should be noted that, due to the bearing 3, the friction between the connecting shaft 13 and the housing 11 is reduced, and the mutual influence between the connecting shaft 13 and the housing 11 is reduced. The connecting shaft 13 rotates with the rotating shaft 6, and since the housing 11 is connected to the connecting shaft 13 through the bearing 3, the influence of the rotation of the connecting shaft 13 on the housing 11 is reduced, thereby improving the measurement accuracy of the vibration detection component 2.

[0053] According to some embodiments of the present application, in the test apparatus 100, the vibration detection element 2 is disposed on the side of the second wall 112 away from the receiving cavity, and the vibration detection element 2 is coaxially disposed with the connecting shaft 13.

[0054] The vibration detection element 2 is coaxially arranged with the connecting shaft 13, making the collected vibration data more targeted and consistent. During data acquisition, due to the precise positioning of the sensor, the collected vibration data can accurately reflect the horizontal vibration of the connecting shaft 13, reducing data errors caused by sensor position deviation. Simultaneously, its location on the side of the second wall 112 opposite to the receiving cavity facilitates wiring and data transmission, allowing for more efficient transmission of the collected vibration data to subsequent processing devices.

[0055] In some embodiments of this application, the vibration detection element 2 can at least partially penetrate the second wall 112 and be connected to the connecting shaft 13. The vibration detection element 2 and the connecting shaft 13 rotate together, so that the vibration detection element 2 can directly detect the vibration data of the connecting shaft 13, reducing the vibration attenuation caused by the shell 11 as an intermediate transition, and can detect more accurate vibration data.

[0056] The testing apparatus 100 according to some embodiments of this application further includes a signal transmission line 4, one end of which is connected to the vibration detection element 2 and the rotational speed detection element 12 respectively, and the other end of which is adapted to be connected to a processing device.

[0057] One end of the signal transmission line 4 is connected to the vibration detection element 2 and the speed detection element 12, and the other end is suitable for connection to the processing device, thus constructing a data transmission channel from the measuring component to the processing device. The vibration detection element 2 is responsible for measuring the transverse vibration information of the rotating shaft 6, and the speed detection element 12 acquires the speed fluctuation of the connecting shaft 13 to reflect the torsional vibration. All the collected data needs to be transmitted to the processing device for analysis in a timely and accurate manner. The data transmission ensures that the processing device can acquire the vibration and speed information of the rotating shaft 6 in real time, providing a basis for timely analysis of the operating status of the rotating shaft 6.

[0058] The test apparatus 100 according to some embodiments of this application further includes a connector 5, one end of which is formed with a first connecting portion 51, and a first mating portion 131 that mates with the first connecting portion 51 is formed on the axis of the connecting shaft 13, and the first connecting portion 51 and the first mating portion 131 are detachably connected; the other end of the connector 5 is formed with a second connecting portion 52, and a second mating portion 61 that mates with the second connecting portion 52 is formed on the axis of the rotating shaft 6, and the second connecting portion 52 and the second mating portion 61 are detachably connected.

[0059] Connector 5 is connected to connecting shaft 13 and rotating shaft 6 respectively through different connecting parts at both ends. The first connecting part 51 at one end mates with the first mating part 131 on the axis of connecting shaft 13, and the second connecting part 52 at the other end mates with the second mating part 61 on the axis of rotating shaft 6. Both connections are detachable, allowing the testing device 100 to be easily connected and disconnected from the rotating shaft 6. When installing the testing device 100, the first connecting part 51 at one end of connector 5 should be aligned with the first mating part 131 on connecting shaft 13, and then the second connecting part 52 at the other end should be aligned with the second mating part 61 on rotating shaft 6 to complete the connection between the entire device and the rotating shaft 6. This detachable connection method avoids fixed or complex connections, eliminating the need for numerous tools and offering simple and quick operation. The detachable connection allows for rapid installation, and similarly, disassembly is straightforward. By simply separating the connecting parts, the testing device 100 can be easily removed from the rotating shaft 6, facilitating device relocation and subsequent maintenance. This convenient installation and disassembly significantly improves the efficiency of the testing device 100, enabling rapid installation and removal and facilitating timely testing of different rotating shafts 6, saving time and accelerating research and development and production. Furthermore, easy disassembly also facilitates regular maintenance and inspection, ensuring the device remains in good working order.

[0060] According to some embodiments of the present application, the test apparatus 100 has a connector 5 constructed as a double-ended bolt, and bolt holes adapted to the double-ended bolt are respectively provided on the axis of the connecting shaft 13 and the axis of the rotating shaft 6.

[0061] The double-ended bolts are screwed into bolt holes on the connecting shaft 13 and the rotating shaft 6, respectively. The tight fit between the bolts and bolt holes forms a reliable mechanical connection. When the rotating shaft 6 is in operation, this connection can withstand complex loads such as torque, axial force, and radial force transmitted by the shaft system. This reliable and stable connection is fundamental to accurately measuring the vibration and speed of the rotating shaft 6, ensuring that the connecting shaft 13 accurately transmits the motion state of the rotating shaft 6. This allows the speed sensor 12 and vibration sensor 2 to obtain data that truly reflects the operating condition of the rotating shaft 6, improving the accuracy and reliability of the test results. Simultaneously, the stable connection also ensures the safety of the testing process, avoiding accidents caused by connection problems.

[0062] In some embodiments of this application, the testing device 100 can be used on rotating shafts 6 such as engine output shafts and machine tool rotating shafts. It is understood that in the field of engines, the testing device 100 can more accurately distinguish the relationship between vibration and noise, thereby optimizing noise control strategies. Based on the results of simultaneous measurement, the source of noise can be located, and targeted noise reduction measures can be formulated. The testing device 100 can provide early warning of faults and locate faulty components through dual monitoring of transverse and torsional vibrations. In terms of NVH (Noise-Vibration-Harshness) performance optimization design of engines, it can optimize structural design based on comprehensive vibration data, reasonably match power system parameters, and improve the overall performance of the engine. By simultaneously measuring transverse and torsional vibrations, testing time can be greatly saved, simple testing and processing methods can be provided, and work efficiency can be greatly improved.

[0063] The engine assembly according to an embodiment of this application is briefly described below.

[0064] The engine assembly according to an embodiment of this application includes an engine and a testing device 100. The engine is provided with an output shaft. The testing device 100 is constructed as described in any of the above embodiments. The testing device 100 is connected to the output shaft. Therefore, the engine assembly according to this application can achieve three-dimensional vibration measurement through the detection device, avoiding misjudgment of faults due to missed vibration types, and improving the accuracy of engine fault detection. At the same time, the vibration characteristics of the engine output shaft affect the NVH performance of the whole vehicle. The torsional vibration and transverse vibration data provided by the testing device 100 can supplement more vibration data, avoiding the increase in time cost caused by single parameter measurement and the operating condition error caused by multiple single parameter measurements, and improving the optimization efficiency of engine performance.

[0065] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0066] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0067] In the description of this application, "multiple" means two or more.

[0068] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0069] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A testing device for a rotating shaft, characterized in that, include: The housing (11) has a receiving cavity formed inside; A connecting shaft (13), at least a portion of which is received in the receiving cavity, is used to connect to a rotating shaft (6); A rotational speed detection element (12) is disposed in the receiving cavity and is used to detect the rotational speed fluctuation of the connecting shaft (13); Vibration detection element (2), which is disposed on the connecting shaft (13) and / or the housing (11) and is used to measure the vibration of the rotating shaft (6) in a plane perpendicular to the connecting shaft (13) and / or in the extension direction of the connecting shaft (13).

2. The testing device for a rotating shaft according to claim 1, characterized in that, The rotational speed detection element (12) also includes: A measuring disk (121) is housed within the receiving cavity. The center of the measuring disk (121) is connected to the connecting shaft (13). The measuring disk (121) has a plurality of grating holes (122) spaced circumferentially. The rotational speed detection element (12) measures the rotational speed fluctuation of the connecting shaft (13) according to the grating hole (122).

3. The testing device for a rotating shaft according to claim 2, characterized in that, The housing (11) includes: A first wall (111) and a second wall (112) are provided, the first wall (111) and the second wall (112) are spaced apart from each other, the first wall (111) has an opening (1111) suitable for the connecting shaft (13) to pass through, and the second wall (112) is provided with the vibration detection element (2); A peripheral wall (113) is connected between the edge of the first wall (111) and the edge of the second wall (112) to enclose the space between the first wall (111) and the second wall (112) and form the receiving cavity.

4. The testing device for a rotating shaft according to claim 3, characterized in that, The rotational speed detection element (12) also includes: The emitting part is disposed on one of the first wall (111) and the second wall (112), and the emitting part is at least partially opposite to the grating hole (122), the emitting part being used to emit optical signals; A receiving part is disposed on the other of the first wall (111) and the second wall (112), and the receiving part is at least partially opposite to the transmitting part. The receiving part is used to receive the optical signal modulated by the grating hole (122) to obtain the rotational speed fluctuation of the connecting shaft (13).

5. The testing device for a rotating shaft according to claim 3, characterized in that, Also includes: The bearing (3) is disposed on the outer periphery of the connecting shaft (13) and supported by the opening (1111).

6. The testing device for a rotating shaft according to claim 3, characterized in that, The vibration detection element (2) is disposed on the side of the second wall (112) away from the receiving cavity, and the vibration detection element (2) is coaxially disposed with the connecting shaft (13).

7. The testing device for a rotating shaft according to claim 6, characterized in that, Also includes: A signal transmission line (4) is provided, one end of which is connected to the vibration detection element (2) and the rotation speed detection element (12) respectively, and the other end of which is adapted to be connected to the processing device.

8. The testing device for a rotating shaft according to claim 1, characterized in that, Also includes A connector (5) has a first connecting part (51) formed at one end, and a first mating part (131) that mates with the first connecting part (51) is formed on the axis of the connecting shaft (13). The first connecting part (51) and the first mating part (131) are detachably connected. The other end of the connector (5) is provided with a second connecting part (52), and a second mating part (61) is provided on the axis of the rotating shaft (6) to cooperate with the second connecting part (52). The second connecting part (52) and the second mating part (61) are detachably connected.

9. The testing device for a rotating shaft according to claim 8, characterized in that, The connector (5) is constructed as a double-ended bolt, and bolt holes adapted to the double-ended bolt are respectively provided on the axis of the connecting shaft (13) and the axis of the rotating shaft (6).

10. An engine assembly, characterized in that, include: An engine, wherein an output shaft is provided on the engine; A testing device, wherein the testing device is configured as a testing device for a rotating shaft as described in any one of claims 1-9, and the testing device is connected to the output shaft.

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