CN104634569A - Dynamic measurement method for torsional rigidity and torsional damping of coupling - Google Patents

Abstract

The invention discloses a dynamic measurement method for torsional rigidity and torsional damping of a coupling. The measurement method relates to an industrial personal computer, a PID (Proportion Integration Differentiation) controller, a hydraulic station and a measuring device, and comprises the following steps: (1) calculating frequency corresponding rated rotation speed to be ne/60 (Hz) according to the rated torque Me (N.m) and the rated rotation speed of ne (rpm) of the coupling, and dividing the frequency range of 0-ne/60 into m equal parts; (2) controlling a torsion angle of a hydraulic servo rotary cylinder by the industrial personal computer through the PID controller and the hydraulic station in sequence; (3) establishing a torsional rigidity TKi(t) measuring model and measuring the torsional rigidity at each frequency; (4) establishing a torsional rigidity TCi(t) measuring model and measuring the torsional damping TCi(t) at each frequency. The torque and the torsion angle are measured under dynamic conditions, and the measuring models are established, so that the dynamic torsional rigidity and the torsional damping of the coupling are accurately measured.

Description

A kind of shaft coupling torsional rigidity and torsion damping dynamic measurement method

Technical field

The present invention relates to a kind of shaft coupling measurement mechanism, particularly relate to a kind of shaft coupling torsional rigidity and reverse damping dynamic measurement method.

Background technology

Current kinematic train nearly all can use shaft coupling, and shaft coupling is mainly used in transmitting torque, drives load, requires to have very high dynamic response characteristic simultaneously.Torsional rigidity and the torsion damping of shaft coupling are very large to transmission influential effect, and this just needs the torsional rigidity of shaft coupling and reverse damping to measure.Current measurement mainly adopts static metering system to measure, and is namely fixed angle lateral load by quiet mode of turning round, tests windup-degree and the torque of shaft coupling under this angle, thus judges the torsional rigidity of shaft coupling and reverse damping.But static twist rigidity and reverse damping and dynamic torsional rigidity and reverse damping and often have very large difference, is all also short of the measurement mechanism of dynamic torsional rigidity and torsion damping and method at present very much.

Summary of the invention

For prior art above shortcomings, the object of the invention is to solve measure how exactly shaft coupling in working order under dynamic torsional rigidity and reverse the problem of damping, a kind of shaft coupling torsional rigidity is provided and reverses damping dynamic measurement method.

In order to solve the problems of the technologies described above, the technical solution used in the present invention is such: a kind of shaft coupling torsional rigidity and torsion damping dynamic measurement method, is characterized in that: comprise industrial computer, PID controller, Hydraulic Station and measurement mechanism; Described measurement mechanism comprises mounting base, angular encoder, hydraulic servo rotating cylinder, shaft coupling to be measured, torque sensor and hold-down support; Described hydraulic servo rotating cylinder by support installing on mounting base, one end of this hydraulic servo rotating cylinder is connected with angular encoder, the other end connects the input end of dish connection shaft coupling to be measured by transition, the output terminal of shaft coupling to be measured connects dish by transition and is connected with torque sensor, and described torque sensor is connected with hold-down support; Described Hydraulic Station is connected with hydraulic servo rotating cylinder, and described industrial computer provides control signal by PID controller to Hydraulic Station, the flow at hydraulic control station and pressure, thus the output torsion angle of hydraulic control servo rotating cylinder and moment of torsion; This industrial computer also has data collector, gathers into industrial computer by this data collector by angular encoder and torque sensor;

Its measuring method and step as follows:

1) be M according to the nominal torque of shaft coupling _e(N.m), rated speed is n _e(rpm) frequency, calculating rated speed corresponding is n _e/ 60 (Hz), and by 0 ~ n _e/ 60 frequency ranges are divided into m equal portions;

2) industrial computer hydraulic control servo rotating cylinder torsion angle successively after PID controller and Hydraulic Station:

${\mathrm{\θ}}_T\left(t\right)=M_e\sin \left(\frac{2\mathrm{\π}{\mathrm{in}}_e}{60m}t\right)---\left(1\right);$

In formula: i=1,2 ..., m-1, m; θ _t(t)---rotating cylinder torsion angle; T---the time;

Adopt data acquisition unit synchronous acquisition torsion angle simultaneously _i(t) and moment of torsion M _i(t), signal length is 5-10 cycle;

3) torsional rigidity TK is set up _i(t) measurement model, and measure the torsional rigidity under each frequency:

${\mathrm{TK}}_i\left(t\right)=\frac{M_i\left(t\right)}{{\mathrm{\θ}}_i\left(t\right)}---\left(2\right);$

4) torsional rigidity TC is set up _i(t) measurement model, and measure the torsion damping TC under each frequency _i(t):

${\mathrm{TC}}_i\left(t\right)=\frac{M_i\left(t\right)}{{\mathrm{\θ}}_i^{,}\left(t\right)}---\left(3\right);$

In formula: θ ' _i(t)---be θ _it () is differentiated, i.e. torsion angle speed.

Further, described torque sensor connects to coil by transition and is connected with L shape hold-down support.

Further, equivalent torsional stiffness DK 5) is set up _ioutput model, and export the equivalent torsional stiffness DK under each frequency _i:

${\mathrm{DK}}_i=\frac{1}{T_i}{\∫}_0^T{T}_i{K}_i\left(t\right)\mathrm{dt}---\left(4\right);$

In formula: T _i---the signal length gathered under each frequency

6) industrial computer is drawn and is exported the dynamic torsional rigidity curve of shaft coupling:

With for horizontal ordinate, DK _ifor ordinate described point draws DK_n _ecurve.

Further, set up equivalence and reverse damping DC _i(t) output model, and damping DC is reversed in the equivalence exported under each frequency _i(t):

${\mathrm{DC}}_i=\frac{1}{T_i}{\∫}_0^T{T}_i{C}_i\left(t\right)\mathrm{dt}---\left(5\right);$

8) industrial computer is drawn and is exported the dynamic torsion damping curve of shaft coupling:

With for horizontal ordinate, DC _ifor ordinate described point draws DC_n _ecurve.

Compared with prior art, tool of the present invention has the following advantages: by applying torsion angle and the moment of torsion of different frequency to hydraulic servo rotating cylinder, measure torque and torsion angle in the dynamic case, and set up measurement model, thus to the dynamic torsional rigidity of shaft coupling and reverse damping and carry out Measurement accuracy, and the relation that can reflect torsional rigidity intuitively by curve and reverse between damping and rotating speed.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the present invention when testing.

In figure: 1-mounting base, 2-angular encoder, 3-hydraulic servo rotating cylinder, 4-shaft coupling to be measured, 5-torque sensor, 6-hold-down support.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

Embodiment: see Fig. 1, a kind of shaft coupling torsional rigidity and torsion damping dynamic measurement method, comprise industrial computer, PID controller, Hydraulic Station and measurement mechanism.Described measurement mechanism comprises mounting base 1, angular encoder 2, hydraulic servo rotating cylinder 3, shaft coupling to be measured 4, torque sensor 5 and hold-down support 6.Described mounting base 1 is a mounting platform, described hydraulic servo rotating cylinder 3 by support installing on mounting base 1, one end of this hydraulic servo rotating cylinder 3 is connected with angular encoder 2, the other end connects the input end of dish connection shaft coupling 4 to be measured by transition, the output terminal of shaft coupling 4 to be measured connects dish by transition and is connected with torque sensor 5, and described torque sensor 5 is connected with hold-down support 6; Concrete enforcement is, described torque sensor 5 connects dish by transition and is connected with L shape hold-down support 6.Described Hydraulic Station is connected with hydraulic servo rotating cylinder 3, and described industrial computer provides control signal by PID controller to Hydraulic Station, the flow at hydraulic control station and pressure, thus the output torsion angle of hydraulic control servo rotating cylinder 3 and moment of torsion; This industrial computer also has data collector, is gathered angular encoder 2 and torque sensor 5 into industrial computer by this data collector.

Its measuring method and step as follows:

1) be M according to the nominal torque of shaft coupling _e(N.m), rated speed is n _e(rpm) frequency, calculating rated speed corresponding is n _e/ 60 (Hz), and by 0 ~ n _e/ 60 frequency ranges are divided into m equal portions (usual m is the integer between 5-10).

2) industrial computer hydraulic control servo rotating cylinder torsion angle successively after PID controller and Hydraulic Station:

${\mathrm{\θ}}_T\left(t\right)=M_e\sin \left(\frac{2\mathrm{\π}{\mathrm{in}}_e}{60m}t\right)---\left(1\right);$

In formula: i=1,2 ..., m-1, m; θ _t(t)---rotating cylinder torsion angle; T---the time;

Adopt data acquisition unit synchronous acquisition torsion angle simultaneously _i(t) and moment of torsion M _it (), signal length is 5-10 cycle.

3) torsional rigidity TK is set up _i(t) measurement model, and measure the torsional rigidity under each frequency:

${\mathrm{TK}}_i\left(t\right)=\frac{M_i\left(t\right)}{{\mathrm{\θ}}_i\left(t\right)}---\left(2\right);$

5) equivalent torsional stiffness DK is set up _ioutput model, and export the equivalent torsional stiffness DK under each frequency _i:

${\mathrm{DK}}_i=\frac{1}{T_i}{\∫}_0^T{T}_i{K}_i\left(t\right)\mathrm{dt}---\left(4\right);$

In formula: T _i---the signal length gathered under each frequency.

6) industrial computer is drawn and is exported the dynamic torsional rigidity curve of shaft coupling:

With for horizontal ordinate, DK _ifor ordinate described point draws DK_n _ecurve (relation curve namely between torsional rigidity and rotating speed).

4) torsion damping TC is set up _i(t) measurement model, and measure the torsion damping TC under each frequency _i(t):

${\mathrm{TC}}_i\left(t\right)=\frac{M_i\left(t\right)}{{\mathrm{\θ}}_i^{,}\left(t\right)}---\left(3\right);$

In formula: θ _i(t)---be θ _it () is differentiated, i.e. torsion angle speed;

7) set up equivalence and reverse damping DC _i(t) output model, and damping DC is reversed in the equivalence exported under each frequency _i(t):

${\mathrm{DC}}_i=\frac{1}{T_i}{\∫}_0^T{T}_i{C}_i\left(t\right)\mathrm{dt}---\left(5\right);$

8) industrial computer is drawn and is exported the dynamic torsion damping curve of shaft coupling:

With for horizontal ordinate, DC _ifor ordinate described point draws DC_n _ecurve (namely reversing the relation curve between damping and rotating speed).

Finally it should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention but not restriction technologies scheme, those of ordinary skill in the art is to be understood that, those are modified to technical scheme of the present invention or equivalent replacement, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of right of the present invention.

Claims (4)

1. shaft coupling torsional rigidity and a torsion damping dynamic measurement method, is characterized in that: comprise industrial computer, PID controller, Hydraulic Station and measurement mechanism; Described measurement mechanism comprises mounting base, angular encoder, hydraulic servo rotating cylinder, shaft coupling to be measured, torque sensor and hold-down support; Described hydraulic servo rotating cylinder by support installing on mounting base, one end of this hydraulic servo rotating cylinder is connected with angular encoder, the other end connects the input end of dish connection shaft coupling to be measured by transition, the output terminal of shaft coupling to be measured connects dish by transition and is connected with torque sensor, and described torque sensor is connected with hold-down support; Described Hydraulic Station is connected with hydraulic servo rotating cylinder, and described industrial computer provides control signal by PID controller to Hydraulic Station, the flow at hydraulic control station and pressure, thus the output torsion angle of hydraulic control servo rotating cylinder and moment of torsion; This industrial computer also has data collector, gathers into industrial computer by this data collector by angular encoder and torque sensor;

Its measuring method and step as follows:

1) be M according to the nominal torque of shaft coupling _e(N.m), rated speed is n _e(rpm) frequency, calculating rated speed corresponding is n _e/ 60 (Hz), and by 0 ~ n _e/ 60 frequency ranges are divided into m equal portions;

2) industrial computer hydraulic control servo rotating cylinder torsion angle successively after PID controller and Hydraulic Station:

${\mathrm{\θ}}_T\left(t\right)=M_e\sin \left(\frac{2\mathrm{\π}{\mathrm{in}}_e}{60m}t\right)---\left(1\right);$

In formula: i=1,2 ..., m-1, m; θ _t(t)---rotating cylinder torsion angle; T---the time;

Adopt data acquisition unit synchronous acquisition torsion angle simultaneously _i(t) and moment of torsion M _i(t), signal length is 5-10 cycle;

3) torsional rigidity TK is set up _i(t) measurement model, and measure the torsional rigidity under each frequency:

${\mathrm{TK}}_i\left(t\right)=\frac{M_i\left(t\right)}{{\mathrm{\θ}}_i\left(t\right)}---\left(2\right);$

4) torsional rigidity TC is set up _i(t) measurement model, and measure the torsion damping TC under each frequency _i(t):

${\mathrm{TC}}_i\left(t\right)=\frac{M_i\left(t\right)}{{\mathrm{\θ}}_i^{,}\left(t\right)}---\left(3\right);$

In formula: θ ' _i(t)---be θ _it () is differentiated, i.e. torsion angle speed.

2. a kind of shaft coupling torsional rigidity according to claim 1 and torsion damping dynamic measurement method, is characterized in that: described torque sensor connects dish by transition and is connected with L shape hold-down support.

3. a kind of shaft coupling torsional rigidity according to claim 1 and torsion damping dynamic measurement method, is characterized in that:

5) equivalent torsional stiffness DK is set up _ioutput model, and export the equivalent torsional stiffness DK under each frequency _i:

${\mathrm{DK}}_i=\frac{1}{T_i}{\∫}_0^T{T}_i{K}_i\left(t\right)\mathrm{dt}---\left(4\right);$

In formula: T _i---the signal length gathered under each frequency

6) industrial computer is drawn and is exported the dynamic torsional rigidity curve of shaft coupling:

With for horizontal ordinate, DK _ifor ordinate described point draws DK-n _ecurve.

4. a kind of shaft coupling torsional rigidity according to claim 1 and torsion damping dynamic measurement method, is characterized in that:

7) set up equivalence and reverse damping DC _i(t) output model, and damping DC is reversed in the equivalence exported under each frequency _i(t):

${\mathrm{DC}}_i=\frac{1}{T_i}{\∫}_0^T{T}_i{C}_i\left(t\right)\mathrm{dt}---\left(5\right);$

8) industrial computer is drawn and is exported the dynamic torsion damping curve of shaft coupling:

With for horizontal ordinate, DC _ifor ordinate described point draws DC-n _ecurve.