CN104165743A - Shafting torsional vibration simulation testing table and testing method thereof - Google Patents
Shafting torsional vibration simulation testing table and testing method thereof Download PDFInfo
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Abstract
The invention discloses a shafting torsional vibration simulation testing table and a testing method thereof. The simulation testing table comprises a rotating shaft, a torsional vibration sensor, a controller, a drive device and a load torque generating device. The torsional vibration sensor and the load torque generating device are installed on the rotating shaft, and the rotating shaft is used for simulating shafting of a hybrid power excavator power system. The data output end of the torsional vibration sensor is connected to the data input end of the controller. The drive device drives the rotating shaft and the load torque generating device to rotate. The load torque generating device enables load torque of the rotating shaft to change through a belt wheel mechanism, and by means of torsional vibration of the rotating shaft under the load torque, the torsional vibration of the shafting of the hybrid power excavator power system is simulated; the torsional vibration sensor is used for obtaining the torsional vibration amplitude of the rotating shaft, and data of the torsional vibration amplitude are input into the controller for being processed, analyzed and tested. The shafting torsional vibration simulation testing table is easy to operate and simple in structure, and can apply the adjustable load torque with the short-time impact characteristic on the shafting.
Description
Technical field
The present invention relates to a kind of twisting vibration simulator stand and method of testing, relate in particular to a kind of torsional vibration of shafting simulator stand and method of testing that is specially adapted to hybrid excavator.
Background technology
Hybrid excavator, having advantage aspect capable of saving fuel oil consumption and minimizing pollutant emission, is one of development trend of excavator.The development of hybrid excavator lasts shorter, and many gordian techniquies are also immature, so hybrid excavator is current also in development and improvement stage.
Hybrid excavator power system can produce twisting vibration in axle system after introducing ISG motor.Test findings shows, the twisting vibration of hybrid power system axle system easily causes axle system major accident such as fracture grade.Therefore, be necessary the twisting vibration phenomenon of hybrid power system axle system to launch further investigation.Yet, consider power system compact conformation, the complexity of existing hybrid excavator, be not suitable for directly as test platform, carrying out the correlative study of hybrid power system shafting torsional vibration test.Therefore, be necessary to develop a kind of simple in structure, cost is low, test result accurately torsional vibration of shafting simulator stand for carrying out hybrid excavator power system torsional vibration of shafting research.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, provide a kind of easy and simple to handle, simple in structure, can simulate power system axle system rotatablely move and can to axle system apply adjustable, there is the torsional vibration of shafting simulator stand of impact characteristics load torque in short-term, also corresponding provide a kind of simple to operate, test result accurately and reliably, the big or small adjustable method of testing of load torque.
For solving the problems of the technologies described above, 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 comprises rotating shaft, torsional oscillation sensor, controller, drive unit 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 drive unit drive shaft and load torque generating means rotate, described load torque generating means is mainly by a pulley mechanism, rotating shaft load torque to be changed.
In above-mentioned torsional vibration of shafting simulator stand, preferred, described load torque generating means comprises belt pulley and eccentric belt wheel, and load torque generating means is arranged in rotating shaft by belt pulley, between belt pulley and eccentric belt wheel, by driving-belt, connects.This preferred torsional vibration of shafting simulator stand is specially adapted to the torsional vibration of shafting of test mixing power digger power system, there is difference in load characteristic and the common mechanical of hybrid excavator power system axle system, its load has periodically, cycle be several seconds to tens seconds not etc., load also has impact characteristics in short-term, and this preferred pulley mechanism not only structure is very simple, with low cost, easy to adjust, and can realize the cyclical variation of rotating shaft impact load torque in short-term.
Preferred, described rotating shaft is preferably elastic shaft, and one end of elastic shaft is connected in the circle centre position of belt pulley, and the other end connects described drive unit or is connected to a bearing, and drive unit provides power by elastic shaft to load torque generating means.Another kind of preferred scheme is, one end of elastic shaft is connected in the circle centre position of belt pulley, and the other end is connected to a bearing, and bearing is fixed on pedestal, and drive unit provides power by load torque generating means to elastic shaft.Preferred elastomeric axle is to wish can produce more significant twisting vibration under identical load torque, so that analyze the impact that load variations is brought, and can be by changing the hybrid power system axle of the elastic shaft simulation different-stiffness of different parameters.
In above-mentioned torsional vibration of shafting simulator stand, preferred, described torsional oscillation sensor comprises torsional oscillation tester and obtains the scrambler of rotating shaft fluctuation of speed situation; The output terminal of described scrambler is connected with torsional oscillation tester.Preferred, described scrambler is installed with rotating shaft is concentric, every rotation 1 circle of rotating shaft, and the output umber of pulse of scrambler 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 drive unit is motor, the output terminal of described controller is connected to the control end of drive unit, described motor is to be connected with rotating shaft or load torque generating means by a shaft coupling, and described controller changes the frequency that applies of rotating shaft load torque by changing the rotating speed of motor.
As a total technical conceive, the present invention also provides a kind of use method that above-mentioned torsional vibration of shafting simulator stand is tested torsional vibration of shafting, torsional vibration of shafting by described torsional vibration of shafting simulator stand for test mixing power digger power system, specifically comprises the following steps:
By elastic shaft, for simulating the axle of hybrid excavator power system, be; By described drive unit, drive elastic shaft to rotate;
Make one end of elastic shaft install described load torque generating means;
The twisting vibration of the twisting vibration simulation hybrid excavator power system axle system under the external load producing at described load torque generating means by elastic shaft;
By described torsional oscillation sensor, obtain again the twisting vibration amplitude of elastic shaft, and twisting vibration amplitude data are input to described controller and carry out Data Management Analysis and test.
In above-mentioned method of testing, preferably, described load torque generating means is by a pulley mechanism, elastic shaft load torque to be changed, this pulley mechanism is to be driven by the belt pulley that is installed in elastic shaft one end, and by driving-belt, rotation is delivered to another eccentric belt wheel, effect based on eccentric belt wheel in transmission process changes the distance of center circle between eccentric belt wheel and belt pulley, changed the tension force of driving-belt, and then cause the variation of elastic shaft load torque, thereby realize applying of elastic shaft load torque.
In above-mentioned method of testing, preferred, described torsional oscillation sensor is the fluctuation situation of elastic shaft rotating speed of first obtaining by scrambler, and then by torsional oscillation tester, obtains the twisting vibration amplitude of elastic shaft.
In above-mentioned method of testing, preferably, by described controller, change the rotating speed of described drive unit, by changing the rotating speed of described drive unit, change the frequency that applies of elastic shaft load torque.
In above-mentioned method of testing, preferred, the eccentric throw while installing by adjusting described eccentric belt wheel changes the size of elastic shaft load torque.
Compared with prior art, the invention has the advantages that:
(1) torsional vibration of shafting simulator stand of the present invention simple in structure, install easy, easy to operate, can apply controllability load torque to axle system, can simulate well the twisting vibration of hybrid excavator power system axle system, for follow-up, carry out the research of hybrid excavator power system torsional vibration of shafting and performance test provides secure support;
(2) in the preferred technical scheme of the present invention, various test parameters of regulation and control well; The present invention, by the motion of direct motor drive elastic shaft simulation hybrid power system axle system, can realize by controlling the variation of motor speed the adjusting that elastic shaft load torque applies frequency; By belt pulley and eccentric belt wheel, can realize the cyclical variation of elastic shaft load torque; Eccentric throw while installing by adjusting eccentric belt wheel can change the size of elastic shaft load torque;
(3) load torque generating means of the present invention is not only simple in structure, reliable, and owing to being Elastic Contact between pulley mechanism and elastic shaft, can also play executing loaded overprotection effect.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of hybrid excavator power system torsional vibration of shafting simulator stand in the embodiment of the present invention 1.
Fig. 2 is the motion state schematic diagram of load torque generating means when distance of center circle is nearest in the embodiment of the present invention 1.
Fig. 3 be in the embodiment of the present invention 1 load torque generating means at distance of center circle the motion state schematic diagram farthest time.
Fig. 4 is the structure principle chart of hybrid excavator power 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, drive unit; 6, scrambler; 7, torsional oscillation tester; 8, belt pulley; 9, eccentric belt wheel; 10, driving-belt; 11, shaft coupling; 12, bearing; 13, pedestal.
Embodiment
For the ease of understanding the present invention, below in connection with Figure of description and preferred embodiment, the present invention is done more comprehensively, described meticulously, but protection scope of the present invention is not limited to following specific embodiment.
It should be noted that, when a certain element is described on " be fixed on, be fixed in, be connected in or be communicated in " another element, it can be directly fixing, affixed, connect or be communicated with on another element, can be also by other intermediate connectors indirectly fixing, affixed, connection or connection on another element.
Unless otherwise defined, all technical terms of hereinafter using are identical with the implication that those skilled in the art understand conventionally.Technical term used herein, just in order to describe the object of specific embodiment, is not to be intended to limit the scope of the invention.
Unless otherwise specified, the various materials of using in the present invention, instrument and equipment etc. all can be bought and be obtained or can prepare by existing method by market.
embodiment 1:
As shown in FIG. 1 to 3, a kind of torsional vibration of shafting simulator stand for test mixing power digger power system of the present invention, comprises elastic shaft 1, load torque generating means 2, torsional oscillation sensor 3, controller 4 and drive unit 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 output terminal of controller 4 is connected to the control end of drive unit 5, drive unit 5 drives elastic shaft 1 to rotate, and load torque generating means 2 is mainly by a pulley mechanism, elastic shaft 1 load torque to be changed.The drive unit 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 frequency that applies 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 comprises belt pulley 8 and eccentric belt wheel 9, and load torque generating means 2 is arranged on elastic shaft 1 by belt pulley 8, between belt pulley 8 and eccentric belt wheel 9, by driving-belt 10, connects.As shown in Figure 1, one end of elastic shaft 1 is connected in the circle centre position of belt pulley 8, other end connecting drive device 5, and drive unit 5 provides power to load torque generating means 2 by elastic shaft 1, and the belt pulley 8 of elastic shaft 1 and load torque generating means 2 is rotated.
As shown in Figure 1, the torsional oscillation sensor 3 of the present embodiment comprises torsional oscillation tester 7 and the scrambler 6 that obtains elastic shaft 1 fluctuation of speed situation; The output terminal of scrambler 6 is connected with torsional oscillation tester 7, and the output terminal of torsional oscillation tester 7 is connected with the input end of controller 4.Scrambler 6 is arranged on elastic shaft 1 and one end of close connecting drive device 5, scrambler 6 and the concentric installation of elastic shaft 1, every rotation 1 circle of elastic shaft 1, the output umber of pulse of scrambler 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 and is deposited in controller 4 by scrambler 6.
Torsional vibration of shafting by the torsional vibration of shafting simulator stand of the present embodiment for test mixing power digger power system, method of work and the principle of the torsional vibration of shafting simulator stand of the present embodiment are as follows:
By elastic shaft 1, for simulating the axle of hybrid excavator power system, be; By drive unit 5, drive elastic shaft 1 to rotate; Make one end installing load torque generating means 2 of elastic shaft 1, load torque generating means 2 is by pulley mechanism, elastic shaft 1 load torque to be changed, the twisting vibration of the twisting vibration simulation hybrid excavator power system axle system under the external load producing at load torque generating means 2 by elastic shaft 1; By torsional oscillation sensor 3, obtain again the twisting vibration amplitude of elastic shaft 1, and twisting vibration amplitude data are input to controller 4 and carry out Data Management Analysis and test.
In the present embodiment, the working mechanism that load torque generating means 2 changes elastic shaft 1 load torque by pulley mechanism is: during simulator stand work, the starting of controller 4 accessory drives 5, drive unit 5 drives elastic shaft 1 to rotate by shaft coupling 11, and load torque generating means 2 comprises belt pulley 8 and eccentric belt wheel 9, elastic shaft 1 one end is connected to the circle centre position of belt pulley 8, so the rotation of elastic shaft 1 drives belt pulley 8 to rotate, owing to connecting by driving-belt 10 between belt pulley 8 and eccentric belt wheel 9, so belt pulley 8 is delivered to eccentric belt wheel 9 by driving-belt 10 by rotation, eccentric belt wheel 9 can be fixed on a pedestal by bearing, as 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 rotation center of eccentric belt wheel 9, C1, C2 and C3 are on same straight line, distance between C2 and C3 is e, in transmission process, the effect of eccentric belt wheel 9 will change the distance of center circle between eccentric belt wheel 9 and belt pulley 8, 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 motion process rotating a circle, the length of driving-belt 10 will change once, the load torque that is applied to elastic shaft 1 also will change once, when eccentric belt wheel constantly rotates, can realize the load torque of elastic shaft 1 is periodically applied.By adopting eccentric belt wheel to realize, load, can realize applying of impact load moment of torsion in short-term.Meanwhile, by changing the outer contoured shape of eccentric belt wheel, can realize the multi-form moment of torsion of impact load in short-term.
Due to load torque to apply frequency identical with the rotating speed of motor, by changing the rotating speed of motor, can change the frequency that applies of aforementioned load torque; And when setting-up eccentricity belt wheel 9, by changing the eccentric throw size between C2 and C3, can change the size of elastic shaft 1 load torque.Whole adjustment process is simple, convenient.
In the present embodiment, the concrete principle that torsional oscillation sensor 3 obtains the twisting vibration amplitude of elastic shaft 1 is: torsional oscillation sensor 3 first obtains the fluctuation situation of elastic shaft 1 rotating speed by scrambler 6, and then by the twisting vibration amplitude of torsional oscillation tester 7 acquisition elastic shafts 1, the twisting vibration test data that torsional oscillation tester 7 obtains can deposit in controller 4 in order to follow-up use.
embodiment 2:
As shown in Figure 4, a kind of torsional vibration of shafting simulator stand for test mixing power digger power system of the present invention, comprises elastic shaft 1, load torque generating means 2, torsional oscillation sensor 3, controller 4 and drive unit 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 output terminal of controller 4 is connected to the control end of drive unit 5, and load torque generating means 2 is mainly by a pulley mechanism, elastic shaft 1 load torque to be changed.The drive unit 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 frequency that applies 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 comprises belt pulley 8 and eccentric belt wheel 9, and load torque generating means 2 is arranged on elastic shaft 1 by belt pulley 8, between belt pulley 8 and eccentric belt wheel 9, by driving-belt 10, connects.One end of elastic shaft 1 is connected in 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 drive unit 5 provides power to elastic shaft 1 by load torque generating means 2, and the belt pulley 8 of elastic shaft 1 and load torque generating means 2 is rotated.
As shown in Figure 4, the torsional oscillation sensor 3 of the present embodiment comprises torsional oscillation tester 7 and the scrambler 6 that obtains elastic shaft 1 fluctuation of speed situation; The output terminal of scrambler 6 is connected with torsional oscillation tester 7, and the output terminal of torsional oscillation tester 7 is connected with the input end of controller 4.Scrambler 6 and the concentric installation of elastic shaft 1, every rotation 1 circle of elastic shaft 1, the output umber of pulse of scrambler 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 and is deposited in controller 4 by scrambler 6.
Torsional vibration of shafting by the torsional vibration of shafting simulator stand of the present embodiment for test mixing power digger power system, method of work and the principle of the torsional vibration of shafting simulator stand of the present embodiment are as follows:
By elastic shaft 1, for simulating the axle of hybrid excavator power system, be; By drive unit 5, drive the eccentric belt wheel 9 of load torque generating means 2 to rotate, eccentric belt wheel 9 drives belt pulley 8 to rotate by driving-belt 10, because 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 be by pulley mechanism make elastic shaft 1 load torque generating period, impact changes in short-term, the twisting vibration of the twisting vibration simulation hybrid excavator power system axle system under the external load producing at load torque generating means 2 by elastic shaft 1; By torsional oscillation sensor 3, obtain again the twisting vibration amplitude of elastic shaft 1, and twisting vibration amplitude data are input to controller 4 and carry out Data Management Analysis and test.
In the present embodiment, the working mechanism that load torque generating means 2 changes elastic shaft 1 load torque by pulley mechanism is substantially the same manner as Example 1, specifically can be referring to the description in embodiment 1 and accompanying drawing 2 and accompanying drawing 3.By adopting eccentric belt wheel to realize, load, can realize applying of impact load moment of torsion in short-term.Meanwhile, by changing the outer contoured shape of eccentric belt wheel, can realize the multi-form moment of torsion of impact load in short-term.Due to load torque to apply frequency identical with the rotating speed of motor, by changing the rotating speed of motor, can change the frequency that applies of aforementioned load torque; And when setting-up eccentricity belt wheel 9, by changing the eccentric throw size between C2 and C3, can change the size of elastic shaft 1 load torque.Whole adjustment process is simple, convenient.
In the present embodiment, the concrete principle of twisting vibration amplitude that torsional oscillation sensor 3 obtains elastic shaft 1 is identical with embodiment 1.
The description of above embodiment is mainly in order to further illustrate ultimate principle of the present invention and principal character; the technician of the industry should understand; 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 all fall in the claimed scope of the invention, and the claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (10)
1. a torsional vibration of shafting simulator stand, it is characterized in that: described torsional vibration of shafting simulator stand comprises rotating shaft, torsional oscillation sensor (3), controller (4), drive unit (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 drive unit (5) drive shaft and load torque generating means (2) rotate, described load torque generating means (2) is mainly by a pulley mechanism, rotating shaft load torque to be changed.
2. torsional vibration of shafting simulator stand according to claim 1, it is characterized in that: described load torque generating means (2) comprises belt pulley (8) and eccentric belt wheel (9), load torque generating means (2) is arranged in rotating shaft by belt pulley (8), between belt pulley (8) and eccentric belt wheel (9), by driving-belt (10), connects.
3. torsional vibration of shafting simulator stand according to claim 2, is characterized in that: described rotating shaft is elastic shaft (1), and one end of elastic shaft (1) is connected in the circle centre position of belt pulley (8); The other end connects described drive unit (5), and drive unit (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 it is upper that bearing (12) is fixed on pedestal (13), and drive unit (5) provides power to elastic shaft (1) by load torque generating means (2).
4. according to the torsional vibration of shafting simulator stand described in claim 1,2 or 3, it is characterized in that: described torsional oscillation sensor (3) comprises torsional oscillation tester (7) and obtains the scrambler (6) of rotating shaft fluctuation of speed situation; The output terminal of described scrambler (6) is connected with torsional oscillation tester (7).
5. torsional vibration of shafting simulator stand according to claim 4, it is characterized in that: described scrambler (6) is installed with rotating shaft is concentric, every rotation 1 circle of rotating shaft, the output umber of pulse of scrambler (6) is no less than 60, and the measuring accuracy of torsional oscillation tester (7) is not less than 0.001 °.
6. according to the torsional vibration of shafting simulator stand described in claim 1,2 or 3, it is characterized in that: described drive unit (5) is motor, the output terminal of described controller (4) is connected to the control end of drive unit (5), described motor is to be connected with rotating shaft or load torque generating means (2) by a shaft coupling (11), and described controller (4) changes the frequency that applies of rotating shaft load torque by changing the rotating speed of drive unit (5).
7. one kind by method that described in any one in claim 1～6, torsional vibration of shafting simulator stand is tested torsional vibration of shafting, it is characterized in that: the torsional vibration of shafting by described torsional vibration of shafting simulator stand for test mixing power digger power system, specifically comprises the following steps:
By elastic shaft (1), for simulating the axle of hybrid excavator power system, be; By described drive unit (5), drive elastic shaft (1) to rotate;
Make one end of elastic shaft (1) install described load torque generating means (2);
The twisting vibration of the twisting vibration simulation hybrid excavator power system axle system under the external load producing at described load torque generating means (2) by elastic shaft (1);
By described torsional oscillation sensor (3), obtain again the twisting vibration amplitude of elastic shaft (1), and twisting vibration amplitude data are input to described controller (4) and carry out Data Management Analysis and test.
8. method according to claim 7, it is characterized in that: described load torque generating means (2) is by a pulley mechanism, elastic shaft (1) load torque to be changed, this pulley mechanism is to be driven by the belt pulley (8) that is installed in elastic shaft (1) one end, and by driving-belt (10), rotation is delivered to another eccentric belt wheel (9), in transmission process, the effect of eccentric belt wheel (9) changes the distance of center circle between eccentric belt wheel (9) and belt pulley (8), changed the tension force of driving-belt (10), and then cause the variation of elastic shaft (1) load torque, thereby realize applying of elastic shaft (1) load torque.
9. according to the method described in claim 7 or 8, it is characterized in that: described torsional oscillation sensor (3) is the fluctuation situation of elastic shaft (1) rotating speed of obtaining by scrambler (6), and then by torsional oscillation tester (7), obtain the twisting vibration amplitude of elastic shaft (1).
10. method according to claim 8, is characterized in that: by described controller (4), change the rotating speed of described drive unit (5), change the frequency that applies of elastic shaft (1) load torque by changing the rotating speed of described drive unit (5); Eccentric throw while installing by adjusting described eccentric belt wheel (9) changes the size of elastic shaft (1) load torque.
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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 |