CN101592210A - A kind of method of permanent power transmission - Google Patents

Abstract

The present invention relates to a kind of method of permanent power transmission, the load torque of establishing on the transmission case output shaft is T (t), and input shaft rotational speed is n _i, the rotating speed of output shaft is n _o, velocity ratio is i (t), the power of output shaft is P, then P=2 π n _o* T (t)=2 π n _i* i (t) * T (t), i.e. i (t)=P/ (2 π n _i* T (t)), load torque T (t) is during with load change, velocity ratio i (t) changes thereupon, and the power P of output shaft is remained unchanged, and makes driving wheel that links to each other with described input shaft and the follower that links to each other with described output shaft adopt the variable element drive wheel of conjugation engagement according to above-mentioned formula.Adopt this method can alleviate the weight of equipment effectively, the worker who reduces equipment consumes and construction cost.

Description

A kind of method of permanent power transmission

Technical field:

What the present invention relates to is a kind of drive method, relates in particular to a kind of method of permanent power transmission.

Background technique:

In the reciprocal elevation and subsidence mechanical such as oil-field oil pumper, load changes in lifting process, as: load is big during lift, and backhaul is that load is little.Little when big when so just making moment of torsion on the transmission case output shaft.And traditional deciding determined that than transmission the rotating speed of output shaft is a constant, and therefore, the power of actual demand is a variable, so in the practical work process, motor can only be equipped with according to peak output.The problem that transmission power changes when solving load change adopts the method for reverse counterweight, and balancing weight moved downward when load was big, and a load hour balancing weight moves upward, and utilizes the moving equilibrium of balancing weight to fall the variation of partial load.This method can't realize permanent completely power transmission, and balancing weight also can increase weight and worker's consumption of equipment, increases construction cost.Existing in prior technology deficiency that Here it is.

Summary of the invention:

Purpose of the present invention is exactly at the existing in prior technology deficiency, and a kind of method that can realize permanent power transmission under the operating mode of varying load is provided.

This programme is realized by following technical measures: in the method for this perseverance power transmission, the load torque of establishing on the transmission case output shaft is T (t), and input shaft rotational speed is n _i, the rotating speed of output shaft is n _o, velocity ratio is i (t), the power of output shaft is P, then P=2 π n _o* T (t)=2 π n _i* i (t) * T (t), promptly $i\left(t\right)=\frac{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="A2009100166430008H1.png"\; state="\{\{state\}\}">P</figure-callout>}}{{2\mathrm{\&pi;n}}_i\&times;T\left(t\right)},$ Load torque T (t) is during with load change, and velocity ratio i (t) changes thereupon, and power P is remained unchanged, and makes driving wheel that links to each other with described input shaft and the follower that links to each other with described output shaft adopt the variable element drive wheel of conjugation engagement according to above-mentioned formula.

The follower that links to each other with above-mentioned output shaft is eccentric roller wheel, and the driving wheel that links to each other with input shaft adopts the variable element cycloidal gear with the engagement of follower conjugation.

The contour shape of above-mentioned driving wheel and follower is poly-definite according to the following step: (1) is according to the variation of load and according to formula $i\left(t\right)=\frac{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="A2009100166430008H1.png"\; state="\{\{state\}\}">P</figure-callout>}}{{2\mathrm{\&pi;n}}_i\&times;T\left(t\right)}$ Determine velocity ratio i (t); (2) determine centre distance between input shaft, the output shaft according to load and requirement of strength; (3) determine roller wheel upward central position, roller quantity, the roller outer diameter of each roller; (4) find the solution the gear teeth shape of driving wheel according to the conjugation theory of engagement.

According to formula $x_i=x_{\mathrm{oi}}-r_r\frac{y_{\mathrm{oi}}^{\&prime;}}{\sqrt{{x_{\mathrm{oi}}^{\&prime;}}^2+{y_{\mathrm{oi}}^{\&prime;}}^2}},$ $y_i=y_{\mathrm{oi}}+r_r\frac{x_{\mathrm{oi}}^{\&prime;}}{\sqrt{{x_{\mathrm{oi}}^{\&prime;}}^2+{y_{\mathrm{oi}}^{\&prime;}}^2}}$ Calculate the centre coordinate of each roller, wherein, x _i, y _iBe the coordinate of roller contour curve, r _rBe radius of roller, x _Oi, y _OiCoordinate for roller centre; x _Oi=acos θ+r _DiCos (θ _Io+ θ), y _Oi=a sin θ+r _DiSin (θ _Io+ θ), wherein, a is the centre distance between input shaft and the output shaft, r _DiBe the distance of roller centre to the roller wheel axis, θ _IoBe the roller initial position angle, θ is point on the roller contour curve and the angle between cycloidal gear circle center line connecting and the x axle.

Each roller distributes for waiting central angle on the above-mentioned follower.

Roller on the above-mentioned follower adopts rolling bearing, sliding bearing or bearing pin.

Above-mentioned roller is cylindrical or conical.

The driving wheel that links to each other with above-mentioned input shaft also can adopt eccentric roller wheel, and the follower that links to each other with output shaft adopts the variable element cycloidal gear with the engagement of driving wheel conjugation.

The beneficial effect of this programme can be learnt according to the narration to such scheme, in the method for this perseverance power transmission, the driving wheel that is positioned on the input shaft is the conjugation engagement with the follower that is positioned on the output shaft, driving wheel adopts variable element cycloidal gear (or eccentric roller wheel), and follower adopts eccentric roller wheel (or variable element cycloidal gear).Velocity ratio $i\left(t\right)=\frac{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="A2009100166430008H1.png"\; state="\{\{state\}\}">P</figure-callout>}}{2{\mathrm{\&pi;n}}_i\&times;T\left(t\right)},$ Input shaft rotational speed n _iBe definite value; When load increased, the load torque T (t) on the output shaft increased, and velocity ratio i this moment (t) correspondingly reduces, and the power P of output shaft is remained unchanged; When load reduced, the load torque T (t) on the output shaft reduced, and velocity ratio i this moment (t) correspondingly increases, and the power P of output shaft is remained unchanged, thereby realized the permanent power transmission of system under the varying load situation.Use this method can save balancing weight, alleviated the weight of equipment, reduced the worker's consumption and the construction cost of equipment.This shows that the present invention compared with prior art has outstanding substantive distinguishing features and obvious improvement, the beneficial effect of its enforcement also is conspicuous.

Description of drawings:

Fig. 1 is the drive mechanism schematic representation in the specific embodiment of the invention.

Among the figure, 1 is input shaft, and 2 is driving wheel, and 3 is output shaft, and 4 is follower, and 5 is roller.

Embodiment:

For clearly demonstrating the technical characterstic of this programme,, and, this programme is set forth in conjunction with its accompanying drawing below by embodiment.

A kind of method of permanent power transmission, the load torque of establishing on the transmission case output shaft is T (t), input shaft rotational speed is n _i(n _i=constant), the rotating speed of output shaft is n _o, velocity ratio is i (t), the power of output shaft is P, then P=2 π n _o* T (t)=2 π n _i* i (t) * T (t), promptly $i\left(t\right)=\frac{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="A2009100166430008H1.png"\; state="\{\{state\}\}">P</figure-callout>}}{{2\mathrm{\&pi;n}}_i\&times;T\left(t\right)}.$ The driving wheel that links to each other with input shaft adopts the variable element cycloidal gear, and the follower that links to each other with output shaft adopts the eccentric roller wheel with the engagement of driving wheel conjugation, and the roller on the eccentric roller wheel adopts cylindrical or conical rolling bearing, sliding bearing or bearing pin.Each roller distributes for waiting central angle on the follower, load not simultaneously, roller centre is unequal to the distance at output shaft center.When load increased, the load torque T (t) of output shaft increased, and roller centre increases to the distance at output shaft center, the rotation speed n of corresponding output shaft _oReduce, thus velocity ratio i (t) reduce, according to formula $i\left(t\right)=\frac{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="A2009100166430008H1.png"\; state="\{\{state\}\}">P</figure-callout>}}{{2\mathrm{\&pi;n}}_i\&times;T\left(t\right)}$ Can draw: the power P of output shaft remains unchanged; Otherwise when load reduced, the load torque T (t) of output shaft reduced, and roller centre reduces to the distance at output shaft center, the rotation speed n of corresponding output shaft _oIncrease, thus velocity ratio i (t) increase, according to formula $i\left(t\right)=\frac{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="A2009100166430008H1.png"\; state="\{\{state\}\}">P</figure-callout>}}{{2\mathrm{\&pi;n}}_i\&times;T\left(t\right)}$ Can draw: the power P of output shaft remains unchanged.When roller centre arrived the descending and ascending variation of distance at output shaft center, this moment, the outer contour of follower adopted the smooth curve transition.

Determine the contour shape of driving wheel and follower as follows: (1) is according to the variation of load and according to formula $i\left(t\right)=\frac{\mathrm{<figure-callout\; id="2"\; label="P"\; filenames="A2009100166430008H1.png"\; state="\{\{state\}\}">P</figure-callout>}}{{2\mathrm{\&pi;n}}_i\&times;T\left(t\right)}$ Determine velocity ratio i (t); (2) determine centre distance between input shaft, the output shaft according to load and requirement of strength; (3) determine roller wheel upward central position, roller quantity, the roller outer diameter of each roller; (4) find the solution the gear teeth shape (variable element cycloid) of driving wheel according to the conjugation theory of engagement.Satisfy permanent power requirements according to the driving wheel that said method drew and the transmission of follower.

Can adopt following two kinds of methods to find the solution the gear teeth profile of driving wheel:

Method one, is at first obtained the path curves of roller centre, x according to the kinematic relation of conjugation engagement _Oi=acos θ+r _DiCos (θ _Io+ θ), y _Oi=a sin θ+r _DiSin (θ _Io+ θ), wherein a is the centre distance between input shaft and the output shaft, r _DiBe the distance of roller centre to the roller wheel axis, θ _IoBe the roller initial position angle, θ is point on the roller contour curve and the angle between cycloidal gear circle center line connecting and the x axle; Then, obtain the equidistant curve of this curve, this equidistant curve is the outer contour of driving wheel and follower, obtains the curve of each roller correspondence; At last, leave out the part curve beyond the meshing zone and consider that intensity removes the tooth top wedge angle, can obtain the shape of the gear teeth.

Method two, at first according to the conjugation theory of engagement, the theoretical roller wheel profile formula that derives of equidistant curve, is obtained the curve of each roller correspondence, and formula is: $x_i=x_{\mathrm{oi}}-r_r\frac{y_{\mathrm{oi}}^{\&prime;}}{\sqrt{{x_{\mathrm{oi}}^{\&prime;}}^2+{y_{\mathrm{oi}}^{\&prime;}}^2}},$ $y_i=y_{\mathrm{oi}}+r_r\frac{x_{\mathrm{oi}}^{\&prime;}}{\sqrt{{x_{\mathrm{oi}}^{\&prime;}}^2+{y_{\mathrm{oi}}^{\&prime;}}^2}},$ Wherein, x _i, y _iBe the coordinate of roller contour curve, r _rBe radius of roller, x _Oi, y _OiCoordinate for roller centre; And x _Oi=a cos θ+r _DiCos (θ _Io+ θ), y _Oi=xasin θ+r _DiSin (θ _Io+ θ), wherein, a is the centre distance between input shaft and the output shaft, r _DiBe the distance of roller centre to the roller wheel axis, θ _IoBe the roller initial position angle, θ is point on the roller contour curve and the angle between cycloidal gear circle center line connecting and the x axle; Then, leave out the part curve beyond the meshing zone and consider that intensity removes the tooth top wedge angle, can obtain the shape of the gear teeth.

The driving wheel that links to each other with input shaft also can adopt eccentric roller wheel, the follower that link to each other with output shaft this moment just adopts the variable element cycloidal gear with the engagement of driving wheel conjugation, also can draw according to above-mentioned principle: when load change, the power P of output shaft remains unchanged.

The present invention is not limited in above-mentioned embodiment, and the variation that those of ordinary skills make in essential scope of the present invention, remodeling, interpolation or replacement also should belong to protection scope of the present invention.Can pass through existing techniques in realizing without the technical characteristics of describing among the present invention, not repeat them here.

Claims (8)

1. the method for a permanent power transmission, it is characterized in that: the load torque of establishing on the transmission case output shaft is T (t), and input shaft rotational speed is n _i, the rotating speed of output shaft is n _o, velocity ratio is i (t), the power of output shaft is P, then P=2 π n _o* T (t)=2 π n _i* i (t) * T (t), promptly $i\left(t\right)=\frac{P}{2\mathrm{\&pi;}{n}_i\&times;T\left(t\right)},$ Load torque T (t) is during with load change, and velocity ratio i (t) changes thereupon, and power P is remained unchanged, and makes driving wheel that links to each other with described input shaft and the follower that links to each other with described output shaft adopt the variable element drive wheel of conjugation engagement according to above-mentioned formula.

2. the method for permanent power transmission according to claim 1 is characterized in that: the follower that links to each other with described output shaft is eccentric roller wheel, and the driving wheel that links to each other with input shaft adopts the variable element cycloidal gear with the engagement of follower conjugation.

3. the method for permanent power transmission according to claim 1 and 2 is characterized in that: the contour shape of described driving wheel and follower is poly-definite according to the following step: (1) is according to the variation of load and according to formula $i\left(t\right)=\frac{P}{2\mathrm{\&pi;}{n}_i\&times;T\left(t\right)}$ Determine velocity ratio i (t); (2) determine centre distance between input shaft, the output shaft according to load and requirement of strength; (3) determine roller wheel upward central position, roller quantity, the roller outer diameter of each roller; (4) find the solution the gear teeth shape of driving wheel according to the conjugation theory of engagement.

4. the method for permanent power transmission according to claim 3 is characterized in that: according to formula $x_i=x_{\mathrm{oi}}-r_r\frac{y_{\mathrm{oi}}^{\&prime;}}{\sqrt{x_{\mathrm{oi}}^{\&prime;2}+y_{\mathrm{oi}}^{\&prime;2}}},$ $y_i=y_{\mathrm{oi}}+r_r\frac{x_{\mathrm{oi}}^{\&prime;}}{\sqrt{x_{\mathrm{oi}}^{\&prime;2}+y_{\mathrm{oi}}^{\&prime;2}}}$ Calculate the centre coordinate of each roller, wherein, x _i, y _iBe the coordinate of roller contour curve, r _rBe radius of roller, x _Oi, y _OiCoordinate for roller centre; x _Oi=acos θ+r _DiCos (θ _Io+ θ), y _Oi=asin θ+r _DiSin (θ _Io+ θ), wherein, a is the centre distance between input shaft and the output shaft, r _DiBe the distance of roller centre to the roller wheel axis, θ _IoBe the roller initial position angle, θ is point on the roller contour curve and the angle between cycloidal gear circle center line connecting and the x axle.

5. the method for permanent power transmission according to claim 2 is characterized in that: each roller distributes for waiting central angle on the described follower.

6. the method for permanent power transmission according to claim 5 is characterized in that: the roller on the described follower adopts rolling bearing, sliding bearing or bearing pin.

7. the method for permanent power transmission according to claim 6 is characterized in that: described roller is cylindrical or conical.

8. the method for permanent power transmission according to claim 1 is characterized in that: the driving wheel that links to each other with described input shaft adopts eccentric roller wheel, and the follower that links to each other with output shaft is the variable element cycloidal gear that meshes with the driving wheel conjugation.

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