CN104165743B - Torsional vibration of shafting simulator stand and method of testing thereof - Google Patents
Torsional vibration of shafting simulator stand and method of testing thereof Download PDFInfo
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Abstract
The invention discloses a kind of torsional vibration of shafting simulator stand and method of testing thereof, simulator stand includes rotating shaft, torsional oscillation sensor, controller, driving means and load torque generating means, torsional oscillation sensor and load torque generating means are installed in rotating shaft, and rotating shaft is used for simulating the axle system of hybrid excavator dynamical system；The data output end of torsional oscillation sensor is connected to the data input pin of controller, driving means drive shaft and load torque generating means rotate, load torque generating means makes shaft load torque change by a pulley mechanism, by the twisting vibration of rotating shaft twisting vibration simulation hybrid excavator dynamical system axle system under load torque；Obtained the twisting vibration amplitude of rotating shaft again by torsional oscillation sensor, and twisting vibration amplitude data is input to controller carries out Data Management Analysis and test.The present invention is easy and simple to handle, simple in construction, can apply scalable to axle system, have impact characteristics load torque in short-term.
Description
Technical field
The present invention relates to a kind of twisting vibration simulator stand and method of testing, particularly relate to a kind of torsional vibration of shafting simulator stand that may be particularly useful for hybrid excavator and method of testing.
Background technology
Hybrid excavator is in saving fuel oil consumption and reduces in terms of pollutant emission and has advantage, is one of the development trend of excavator.The development of hybrid excavator lasts shorter, and many key technologies are the most immature, and therefore hybrid excavator is currently also in developing and the stage of improvement.
Hybrid excavator dynamical system can produce twisting vibration in axle system after introducing ISG motor.Result of the test shows, the twisting vibration of hybrid power system axle system easily causes the major accidents such as axle system fracture.Therefore, it is necessary to the twisting vibration phenomenon of hybrid power system axle system is launched further investigation.However, it is contemplated that the power system architecture of existing hybrid excavator is compact, complicated, it is not suitable for carrying out the correlational study of hybrid power system shafting torsional vibration test directly as test platform.Therefore, it is necessary to develop a kind of simple in construction, low cost, test result torsional vibration of shafting simulator stand accurately for carrying out the research of hybrid excavator dynamical system torsional vibration of shafting.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, a kind of easy and simple to handle, simple in construction is provided, the rotary motion of dynamical system axle system can be simulated and scalable can be applied to axle system, there is the torsional vibration of shafting simulator stand of impact characteristics load torque in short-term, correspondingly provide a kind of simple to operate, test result accurately and reliably, the adjustable method of testing of load torque size.
For solving above-mentioned technical problem, the technical scheme that the present invention proposes is a kind of torsional vibration of shafting simulator stand, described torsional vibration of shafting simulator stand includes rotating shaft, torsional oscillation sensor, controller, driving means and load torque generating means, described torsional oscillation sensor and load torque generating means are installed in rotating shaft, the data output end of torsional oscillation sensor is connected to the data input pin of controller, described driving means drive shaft and load torque generating means rotate, described load torque generating means mainly makes shaft load torque change by a pulley mechanism.
In above-mentioned torsional vibration of shafting simulator stand, it is preferred that described load torque generating means includes belt pulley and eccentric belt wheel, and load torque generating means is arranged in rotating shaft by belt pulley, is connected by transmission band between belt pulley and eccentric belt wheel.This preferred torsional vibration of shafting simulator stand is particularly well-suited to the torsional vibration of shafting of test mixing power digger dynamical system, difference is there is in the load characteristic of hybrid excavator dynamical system axle system with common mechanical, its load has periodically, cycle is several seconds to tens seconds, load also has impact characteristics in short-term, and this preferred pulley mechanism not only structure is the simplest, with low cost, easy to adjust, and the cyclically-varying of rotating shaft impact load torque in short-term can be realized.
It is furthermore preferred that described rotating shaft is preferably elastic shaft, one end of elastic shaft is connected to the circle centre position of belt pulley, and the other end connects described driving means or is connected to a bearing, and driving means provides power by elastic shaft to load torque generating means.Another kind of preferably scheme is that one end of elastic shaft is connected to the circle centre position of belt pulley, and the other end is connected to a bearing, and bearing is fixed on pedestal, and driving means provides power by load torque generating means to elastic shaft.Preferably elastic shaft is desirable under identical load torque to produce more significantly twisting vibration, in order to analyze the load impact that brings of change, it is possible to by changing the hybrid power system axle system of the elastic shaft simulation different-stiffness of different parameters.
In above-mentioned torsional vibration of shafting simulator stand, it is preferred that described torsional oscillation sensor includes torsional oscillation tester and obtains the encoder of rotating shaft fluctuation of speed situation；The outfan of described encoder is connected with torsional oscillation tester.Installing it is furthermore preferred that described encoder is concentric with rotating shaft, rotating shaft often rotates 1 circle, and the output umber of pulse of encoder is no less than 60, and the measuring accuracy of torsional oscillation tester is not less than 0.001 °.
In above-mentioned torsional vibration of shafting simulator stand, preferably, described driving means is motor, the outfan of described controller is connected to the control end of driving means, described motor is to be connected with rotating shaft or load torque generating means by a shaft coupling, and described controller changes the applying frequency of shaft load torque by changing the rotating speed of motor.
As total technology design, the present invention also provides for a kind of method carrying out testing with above-mentioned torsional vibration of shafting simulator stand shaft twisting vibration, described torsional vibration of shafting simulator stand is used for the torsional vibration of shafting of test mixing power digger dynamical system, specifically includes following steps:
Elastic shaft is used for simulating the axle system of hybrid excavator dynamical system；Elastic shaft is driven to rotate by described driving means；
Described load torque generating means is installed in the one end making elastic shaft；
Twisting vibration by elastic shaft twisting vibration simulation hybrid excavator dynamical system axle system under the external load that described load torque generating means produces；
Obtained the twisting vibration amplitude of elastic shaft again by described torsional oscillation sensor, and twisting vibration amplitude data is input to described controller and carries out Data Management Analysis and test.
In above-mentioned method of testing, preferably, described load torque generating means is to make elastic shaft load torque change by a pulley mechanism, this pulley mechanism is to be driven by the belt pulley being installed in elastic shaft one end, and by transmission band, rotation is delivered to another eccentric belt wheel, in transmission process, effect based on eccentric belt wheel makes the distance of center circle between eccentric belt wheel and belt pulley change, change the tension force of transmission band, and then cause the change of elastic shaft load torque, thus realize the applying of elastic shaft load torque.
In above-mentioned method of testing, it is preferred that described torsional oscillation sensor is to first pass through encoder to obtain the fluctuation situation of elastic shaft rotating speed, and then is obtained the twisting vibration amplitude of elastic shaft by torsional oscillation tester.
In above-mentioned method of testing, it is preferred that changed the rotating speed of described driving means by described controller, change the applying frequency of elastic shaft load torque by changing the rotating speed of described driving means.
In above-mentioned method of testing, it is preferred that eccentric throw when installing by adjusting described eccentric belt wheel changes the size of elastic shaft load torque.
Compared with prior art, it is an advantage of the current invention that:
(1) present invention torsional vibration of shafting simulator stand simple in construction, install easy, easy to operate, controllability load torque can be applied to axle system, the twisting vibration of hybrid excavator dynamical system axle system can be simulated well, carry out the research of hybrid excavator dynamical system torsional vibration of shafting and performance test provides secure support for follow-up；
(2), in currently preferred technical scheme, can regulate well and control various test parameter；The present invention by the motion of motor-driven elastic shaft simulation hybrid power system axle system, can realize elastic shaft load torque apply the regulation of frequency by controlling the change of motor speed；The cyclically-varying of elastic shaft load torque can be realized by belt pulley and eccentric belt wheel；Eccentric throw when installing by adjusting eccentric belt wheel can change the size of elastic shaft load torque；
(3) the load torque generating means of the present invention be not only simple in structure, reliable, and owing to being Elastic Contact between pulley mechanism and elastic shaft, moreover it is possible to play executing loaded overprotection effect.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of hybrid excavator dynamical system torsional vibration of shafting simulator stand in the embodiment of the present invention 1.
Fig. 2 is the load torque generating means kinestate schematic diagram when distance of center circle is nearest in the embodiment of the present invention 1.
Fig. 3 is the load torque generating means kinestate schematic diagram when distance of center circle is farthest in the embodiment of the present invention 1.
Fig. 4 is the structure principle chart of hybrid excavator dynamical system torsional vibration of shafting simulator stand in the embodiment of the present invention 2.
Marginal data
1, elastic shaft；2, load torque generating means；3, torsional oscillation sensor；4, controller；5, driving means；6, encoder；7, torsional oscillation tester；8, belt pulley；9, eccentric belt wheel；10, transmission band；11, shaft coupling；12, bearing；13, pedestal.
Detailed description of the invention
For the ease of understanding the present invention, below in conjunction with Figure of description and preferred embodiment, the present invention is made more comprehensively, describes meticulously, but protection scope of the present invention is not limited to embodiment in detail below.
It should be noted that, when a certain element is described as on " be fixed on, be fixed in, be connected to or be communicated in " another element, it can be directly the most fixing, affixed, connect or connect on another element, it is also possible to be by other intermediate connectors indirectly fixing, affixed, connect or connect on another element.
Unless otherwise defined, the implication that all technical term used hereinafter is generally understood that with those skilled in the art is identical.Technical term used herein is intended merely to describe the purpose of specific embodiment, is not intended to limit the scope of the invention.
Unless otherwise specified, the various materials used in the present invention, instrument and equipment etc. all can be commercially available by market or can be prepared by existing method.
Embodiment
1
:
As shown in FIG. 1 to 3, the torsional vibration of shafting simulator stand for test mixing power digger dynamical system of a kind of present invention, including elastic shaft 1, load torque generating means 2, torsional oscillation sensor 3, controller 4 and driving means 5.Torsional oscillation sensor 3 and load torque generating means 2 are installed on elastic shaft 1, the data output end of torsional oscillation sensor 3 is connected to the data input pin of controller 4, the outfan of controller 4 is connected to the control end of driving means 5, driving means 5 drives elastic shaft 1 to rotate, and load torque generating means 2 mainly makes elastic shaft 1 load torque change by a pulley mechanism.The driving means 5 of the present embodiment is motor, and this motor is to be connected with elastic shaft 1 by a shaft coupling 11, and controller 4 changes the applying frequency of elastic shaft 1 load torque by changing the rotating speed of motor.
As shown in FIG. 1 to 3, the load torque generating means 2 of the present embodiment includes belt pulley 8 and eccentric belt wheel 9, and load torque generating means 2 is arranged on elastic shaft 1 by belt pulley 8, is connected by transmission band 10 between belt pulley 8 and eccentric belt wheel 9.As it is shown in figure 1, one end of elastic shaft 1 is connected to the circle centre position of belt pulley 8, the other end connects driving means 5, and driving means 5 provides power to load torque generating means 2 by elastic shaft 1, makes the belt pulley 8 of elastic shaft 1 and load torque generating means 2 rotate.
As it is shown in figure 1, the torsional oscillation sensor 3 of the present embodiment includes torsional oscillation tester 7 and obtains the encoder 6 of elastic shaft 1 fluctuation of speed situation；The outfan of encoder 6 is connected with torsional oscillation tester 7, and the outfan of torsional oscillation tester 7 is connected with the input of controller 4.Encoder 6 is arranged on elastic shaft 1 and near the one end connecting driving means 5, encoder 6 is concentric with elastic shaft 1 to be installed, elastic shaft 1 often rotates 1 circle, the output umber of pulse of encoder 6 is no less than 60, the measuring accuracy of torsional oscillation tester 7 is not less than 0.001 °, and torsional oscillation tester 7 is obtained the twisting vibration amplitude of elastic shaft 1 by encoder 6 and is deposited in controller 4.
Torsional vibration of shafting simulator stand by the present embodiment is used for the torsional vibration of shafting of test mixing power digger dynamical system, and method of work and the principle of the torsional vibration of shafting simulator stand of the present embodiment are as follows:
Elastic shaft 1 is used for simulating the axle system of hybrid excavator dynamical system；Elastic shaft 1 is driven to rotate by driving means 5；Make one end installing load torque generating means 2 of elastic shaft 1, load torque generating means 2 is to make elastic shaft 1 load torque change by pulley mechanism, by the twisting vibration of the elastic shaft 1 twisting vibration simulation hybrid excavator dynamical system axle system under the external load that load torque generating means 2 produces；Obtained the twisting vibration amplitude of elastic shaft 1 again by torsional oscillation sensor 3, and twisting vibration amplitude data is input to controller 4 and carries out Data Management Analysis and test.
In the present embodiment, the working mechanism that load torque generating means 2 makes elastic shaft 1 load torque change by pulley mechanism is: during simulator stand work, controller 4 controls the starting of driving means 5, driving means 5 drives elastic shaft 1 to rotate by shaft coupling 11, and load torque generating means 2 includes belt pulley 8 and eccentric belt wheel 9, elastic shaft 1 one end is connected to the circle centre position of belt pulley 8, and therefore the rotation of elastic shaft 1 then drives belt pulley 8 to rotate；Owing to being connected by transmission band 10 between belt pulley 8 and eccentric belt wheel 9, therefore rotation is delivered to bias belt wheel 9 by transmission band 10 by belt pulley 8；Eccentric belt wheel 9 can be fixed on a pedestal by bearing；nullAs shown in Figures 2 and 3，C1 is the center of circle of belt pulley 8，C2 is the center of circle of eccentric belt wheel 9，C3 is the center of rotation of eccentric belt wheel 9，C1、C2 and C3 is on same straight line，Distance between C2 and C3 is e，In transmission process, the effect of eccentric belt wheel 9 will make the distance of center circle between eccentric belt wheel 9 and belt pulley 8 change，When moving to state shown in Fig. 2，Distance of center circle between eccentric belt wheel 9 and belt pulley 8 is minimum，When moving to state shown in Fig. 3，Distance of center circle between eccentric belt wheel 9 and belt pulley 8 is maximum，Eccentric belt wheel 9 is in the motor process rotated a circle，The length of transmission band 10 will change once，The load torque being applied to elastic shaft 1 also will change once，When eccentric belt wheel constantly rotates，Then can realize the load torque to elastic shaft 1 periodically to apply.By using eccentric belt wheel to realize loading, it is possible to realize the applying of impact load moment of torsion in short-term.Meanwhile, by changing the outer contoured shape of eccentric belt wheel, it is possible to achieve the moment of torsion of impact load in short-term of multi-form.
Owing to the applying frequency of load torque is identical with the rotating speed of motor, the applying frequency of aforementioned load torque can be changed by changing the rotating speed of motor；And when setting-up eccentricity belt wheel 9, by changing the eccentric throw size between C2 and C3, then the size of elastic shaft 1 load torque can be changed.Whole regulation process is simple, convenient.
In the present embodiment, the concrete principle of the twisting vibration amplitude that torsional oscillation sensor 3 obtains elastic shaft 1 is: torsional oscillation sensor 3 first passes through encoder 6 and obtains the fluctuation situation of elastic shaft 1 rotating speed, and then obtaining the twisting vibration amplitude of elastic shaft 1 by torsional oscillation tester 7, the twisting vibration test data that torsional oscillation tester 7 obtains can be stored in controller 4 in case follow-up use.
Embodiment
2
:
As shown in Figure 4, the torsional vibration of shafting simulator stand for test mixing power digger dynamical system of a kind of present invention, including elastic shaft 1, load torque generating means 2, torsional oscillation sensor 3, controller 4 and driving means 5.Torsional oscillation sensor 3 and load torque generating means 2 are installed on elastic shaft 1, the data output end of torsional oscillation sensor 3 is connected to the data input pin of controller 4, the outfan of controller 4 is connected to the control end of driving means 5, and load torque generating means 2 mainly makes elastic shaft 1 load torque change by a pulley mechanism.The driving means 5 of the present embodiment is motor, and this motor is to be connected with load torque generating means 2 by a shaft coupling 11, and controller 4 changes the applying frequency of elastic shaft 1 load torque by changing the rotating speed of motor.
As shown in Figure 4, the load torque generating means 2 of the present embodiment includes belt pulley 8 and eccentric belt wheel 9, and load torque generating means 2 is arranged on elastic shaft 1 by belt pulley 8, is connected by transmission band 10 between belt pulley 8 and eccentric belt wheel 9.One end of elastic shaft 1 is connected to the circle centre position of belt pulley 8, the other end is installed on a bearing 12, bearing 12 is fixed on pedestal 13, and driving means 5 provides power to elastic shaft 1 by load torque generating means 2, makes the belt pulley 8 of elastic shaft 1 and load torque generating means 2 rotate.
As shown in Figure 4, the torsional oscillation sensor 3 of the present embodiment includes torsional oscillation tester 7 and obtains the encoder 6 of elastic shaft 1 fluctuation of speed situation；The outfan of encoder 6 is connected with torsional oscillation tester 7, and the outfan of torsional oscillation tester 7 is connected with the input of controller 4.Encoder 6 is concentric with elastic shaft 1 to be installed, elastic shaft 1 often rotates 1 circle, the output umber of pulse of encoder 6 is no less than 60, and the measuring accuracy of torsional oscillation tester 7 is not less than 0.001 °, and torsional oscillation tester 7 is obtained the twisting vibration amplitude of elastic shaft 1 by encoder 6 and is deposited in controller 4.
Torsional vibration of shafting simulator stand by the present embodiment is used for the torsional vibration of shafting of test mixing power digger dynamical system, and method of work and the principle of the torsional vibration of shafting simulator stand of the present embodiment are as follows:
Elastic shaft 1 is used for simulating the axle system of hybrid excavator dynamical system；The eccentric belt wheel 9 being driven load torque generating means 2 by driving means 5 is rotated, eccentric belt wheel 9 drives belt pulley 8 to rotate by transmission band 10, owing to one end of elastic shaft 1 is installed on belt pulley 8, therefore belt pulley 8 drives again elastic shaft 1 to rotate, load torque generating means 2 is to make elastic shaft 1 load torque generating period, in short-term impact change by pulley mechanism, is simulated the twisting vibration of hybrid excavator dynamical system axle system by the elastic shaft 1 twisting vibration under the external load that load torque generating means 2 produces；Obtained the twisting vibration amplitude of elastic shaft 1 again by torsional oscillation sensor 3, and twisting vibration amplitude data is input to controller 4 and carries out Data Management Analysis and test.
In the present embodiment, the working mechanism that load torque generating means 2 makes elastic shaft 1 load torque change by pulley mechanism is substantially the same manner as Example 1, specifically can be found in the description in embodiment 1 and accompanying drawing 2 and accompanying drawing 3.By using eccentric belt wheel to realize loading, it is possible to realize the applying of impact load moment of torsion in short-term.Meanwhile, by changing the outer contoured shape of eccentric belt wheel, it is possible to achieve the moment of torsion of impact load in short-term of multi-form.Owing to the applying frequency of load torque is identical with the rotating speed of motor, the applying frequency of aforementioned load torque can be changed by changing the rotating speed of motor；And when setting-up eccentricity belt wheel 9, by changing the eccentric throw size between C2 and C3, then the size of elastic shaft 1 load torque can be changed.Whole regulation process is simple, convenient.
In the present embodiment, the concrete principle of the twisting vibration amplitude that torsional oscillation sensor 3 obtains elastic shaft 1 is same as in Example 1.
Describing primarily to further illustrate ultimate principle and the principal character of the present invention of above example; skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements both fall within scope of the claimed invention, and claimed scope is defined by appending claims and equivalent thereof.
Claims (7)
1. a torsional vibration of shafting simulator stand, it is characterized in that: described torsional vibration of shafting simulator stand includes rotating shaft, torsional oscillation sensor (3), controller (4), driving means (5) and load torque generating means (2), described torsional oscillation sensor (3) and load torque generating means (2) are installed in rotating shaft, the data output end of torsional oscillation sensor (3) is connected to the data input pin of controller (4), described driving means (5) drive shaft (1) and load torque generating means (2) rotate, described load torque generating means (2) mainly makes shaft load torque change by a pulley mechanism；
Described load torque generating means (2) includes belt pulley (8) and eccentric belt wheel (9), load torque generating means (2) is arranged in rotating shaft (1) by belt pulley (8), is connected by transmission band (10) between belt pulley (8) and eccentric belt wheel (9)；
Described rotating shaft is elastic shaft (1), and one end of elastic shaft (1) is connected to the circle centre position of belt pulley (8)；The other end connects described driving means (5), and driving means (5) provides power to load torque generating means (2) by elastic shaft (1)；Or, the other end of elastic shaft (1) is connected to a bearing (12), and bearing (12) is fixed on pedestal (13), and driving means (5) provides power to elastic shaft (1) by load torque generating means (2).
Torsional vibration of shafting simulator stand the most according to claim 1, it is characterised in that: described torsional oscillation sensor (3) includes torsional oscillation tester (7) and obtains the encoder (6) of rotating shaft fluctuation of speed situation；The outfan of described encoder (6) is connected with torsional oscillation tester (7).
Torsional vibration of shafting simulator stand the most according to claim 2, it is characterized in that: described encoder (6) is concentric with rotating shaft to be installed, rotating shaft often rotates 1 circle, and the output umber of pulse of encoder (6) is no less than 60, and the measuring accuracy of torsional oscillation tester (7) is not less than 0.001 °.
Torsional vibration of shafting simulator stand the most according to claim 1, it is characterized in that: described driving means (5) is motor, the outfan of described controller (4) is connected to the control end of driving means (5), described motor is to be connected with rotating shaft or load torque generating means by a shaft coupling (11), and described controller (4) changes the applying frequency of shaft load torque by changing the rotating speed of driving means (5).
5. the method carrying out testing with torsional vibration of shafting simulator stand shaft twisting vibration according to any one of Claims 1 to 4, it is characterized in that: described torsional vibration of shafting simulator stand is used for the torsional vibration of shafting of test mixing power digger dynamical system, specifically include following steps:
By elastic shaft (1) for simulating the axle system of hybrid excavator dynamical system；Elastic shaft (1) is driven to rotate by described driving means (5)；
Described load torque generating means (2) is installed in the one end making elastic shaft (1)；
Twisting vibration by the elastic shaft (1) twisting vibration simulation hybrid excavator dynamical system axle system under the external load that described load torque generating means (2) produces；
Obtained the twisting vibration amplitude of elastic shaft (1) again by described torsional oscillation sensor (3), and twisting vibration amplitude data is input to described controller (4) and carries out Data Management Analysis and test；
Described load torque generating means (2) is to make elastic shaft (1) load torque change by a pulley mechanism, this pulley mechanism is to be driven by the belt pulley (8) being installed in elastic shaft (1) one end, and by transmission band (10), rotation is delivered to another eccentric belt wheel (9), in transmission process, the effect of eccentric belt wheel (9) makes the distance of center circle between eccentric belt wheel (9) and belt pulley (8) change, change the tension force of transmission band (10), and then cause the change of elastic shaft (1) load torque, thus realize the applying of elastic shaft (1) load torque.
Method the most according to claim 5, it is characterised in that: described torsional oscillation sensor (3) is the fluctuation situation being obtained elastic shaft (1) rotating speed by encoder (6), and then is obtained the twisting vibration amplitude of elastic shaft (1) by torsional oscillation tester (7).
Method the most according to claim 5, it is characterised in that: changed the rotating speed of described driving means (5) by described controller (4), change the applying frequency of elastic shaft (1) load torque by changing the rotating speed of described driving means (5)；Eccentric throw when installing by adjusting described eccentric belt wheel (9) changes the size of elastic shaft (1) load torque.
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| CN105350599B (en) * | 2015-10-27 | 2017-10-31 | 湖南工程学院 | Parallel type hybrid dynamic excavator dynamical system shafting torsional oscillation control device |
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Application publication date: 20141126 Assignee: Yiyang Chuangxing Technology Co.,Ltd. Assignor: HUNAN INSTITUTE OF ENGINEERING Contract record no.: X2023980052753 Denomination of invention: Shafting torsional vibration simulation test bench and its testing method Granted publication date: 20160928 License type: Common License Record date: 20231219 |
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