CN106120914A - A kind of control device for engineering machinery - Google Patents

Abstract

The invention discloses a kind of control device for engineering machinery, including the first rubber push-pull shaft being arranged in fixed plate, second rubber push-pull shaft, control crank, control crank oscillating bearing, first oscillating bearing, second joint bearing and fixing seat, described fixing seat one end is arranged in fixed plate, the other end of fixing seat is connected with the inner ring of control crank oscillating bearing, control crank is fixing with the outer ring of control crank oscillating bearing to be connected, the outer ring of control crank oscillating bearing and the outer ring of the first oscillating bearing, the outer ring of second joint bearing connects fixing, the mandrel joint of the first rubber push-pull shaft and the inner ring of the first oscillating bearing connect, the mandrel joint of the second rubber push-pull shaft is connected with the inner ring of second joint bearing.The invention have the benefit that simple in construction, only need two actions of an i.e. controllable device of control handle, easy to operate, alleviate the labor intensity of operator, also reduce production cost.

Description

A kind of control device for engineering machinery

Technical field

The present invention relates to engineering machinery design field, be specifically related to a kind of control device for engineering machinery.

Background technology

At present, scraper, fork truck, excavator etc. are widely used at building engineering field, principal arm on body, large arm, auxiliary, Scraper bowl or bucket etc. are all controlled by actuation means, but its actuation means is complex, and each action has independent manipulation Bar, uses inconvenience.Such as scraper, on scraper, the upset of scraper bowl and the lifting of large arm are respectively by two control handles Controlling, actually scraper is operationally, and large arm typically all operates with scraper bowl simultaneously, during operation, the most first promotes control The control crank of large arm, is adjusted to large arm desired location, then promotes another to control the control crank of scraper bowl, make scraper bowl overturn To desired location.So operate the most loaded down with trivial details, add the labor intensity of operator.

Summary of the invention

For solving the problems referred to above, it is desirable to provide a kind of control device for engineering machinery.

The purpose of the present invention realizes by the following technical solutions:

A kind of control device for engineering machinery, including the first rubber push-pull shaft being arranged in fixed plate, the second rubber push-and-pull Axle, control crank, control crank oscillating bearing, the first oscillating bearing, second joint bearing and fixing seat, described fixing seat one end Being arranged in fixed plate, the other end of fixing seat is connected with the inner ring of control crank oscillating bearing, control crank and control crank The outer ring of oscillating bearing is fixing to be connected, the outer ring of control crank oscillating bearing and the outer ring of the first oscillating bearing, second joint axle The outer ring held connects fixing, and the mandrel joint of the first rubber push-pull shaft and the inner ring of the first oscillating bearing connect, and the second rubber pushes away The mandrel joint of pulling shaft is connected with the inner ring of second joint bearing.

The invention have the benefit that simple in construction, only need two actions of an i.e. controllable device of control handle, behaviour Facilitate, alleviate the labor intensity of operator, also reduce production cost, thus solve above-mentioned technical problem.

Accompanying drawing explanation

The invention will be further described to utilize accompanying drawing, but the application scenarios in accompanying drawing does not constitute any limit to the present invention System, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain according to the following drawings Other accompanying drawing.

Fig. 1 is the structural representation of the present invention；

Fig. 2 is the structural representation of life appraisal module of the present invention.

Reference:

Fixed plate the 1, first rubber push-pull shaft the 2, second rubber push-pull shaft 20, control crank 3, control crank oscillating bearing 4, First oscillating bearing 40, second joint bearing 41, fixing seat 5, life appraisal module 6, rolling bar 40, data preparation module 61, longevity Life analyses and prediction module 62.

Detailed description of the invention

In conjunction with following application scenarios, the invention will be further described.

Application scenarios 1

Seeing Fig. 1, Fig. 2, the control device for engineering machinery of an embodiment of this application scene, including being arranged on fixed plate First rubber push-pull shaft the 2, second rubber push-pull shaft 20 on 1, control crank 3, control crank oscillating bearing the 4, first joint shaft Holding 40, second joint bearing 41 and fixing seat 5, described fixing seat 5 one end is arranged in fixed plate 1, the other end of fixing seat 5 with The inner ring of control crank oscillating bearing 4 connects, and control crank 3 is fixing with the outer ring of control crank oscillating bearing 4 to be connected, and handles hands The outer ring of handle oscillating bearing 4 is connected fixing with the outer ring of the first oscillating bearing 40, the outer ring of second joint bearing 41, the first rubber The mandrel joint of push-pull shaft 2 and the inner ring of the first oscillating bearing 40 connect, the mandrel joint and second of the second rubber push-pull shaft 20 The inner ring of oscillating bearing 41 connects.

The above embodiment of the present invention simple in construction, only needs two actions of an i.e. controllable device of control handle, operation Convenient, alleviate the labor intensity of operator, also reduce production cost, thus solve above-mentioned technical problem.

Preferably, the described center of control crank oscillating bearing 4, the center of the first oscillating bearing 40, second joint axle Hold the center of 41 in the same plane.

The setting of this preferred embodiment easily facilitates operation.

Preferably, the described center of control crank oscillating bearing 4, the center of the first oscillating bearing 40, second joint axle Holding the rectangular Triangle-Profile in center of 41, the center of control crank oscillating bearing 4 is in the right angle end of right angled triangle.

This preferred embodiment further increases the convenience of operation.

Preferably, described control device for engineering machinery also includes that life appraisal module 6, described life appraisal module 6 include Data preparation module 61 and durability analysis prediction module 62, described data preparation module 61 is used for determining control device for engineering machinery The crack position of each actual crack, size on the actual measurement loads typical spectrum of each parts, each parts of control device for engineering machinery, and right Various crackles carry out geometry simplification classification；Described durability analysis prediction module 62 is for portion each to described control device for engineering machinery The material of part carries out fatigue test, obtains the described material fatigue crack growth rate curve corresponding to various crackles, and then right The fatigue crack growth rate of described actual measurement loads typical spectrum, the crack position of each actual crack, size and various crackle is bent Line carries out Crack growth analysis, determines the crack propagation life period corresponding to various crackles, further according to described cracks can spread Life Cycle number determines the estimated value of the remanent fatigue life of corresponding crackle, finally determines each parts of control device for engineering machinery The estimated value of remanent fatigue life.

This preferred embodiment arranges life appraisal module, and constructs the structural framing of life appraisal module 6, can be real-time The health performance of monitoring reverse-filling smoke exhaust, increases the safety of reverse-filling smoke exhaust running.

Preferably, define corresponding to crackle i=1,2 ... the estimated value collection of the remanent fatigue life of m is { P₁,P₂,…, P_i, the estimated value P of control device for engineering machinery each parts remanent fatigue life_ZIt is then:

P_Z=min_{I=1,2 ... m}{P₁,P₂,…,P_i}。

This preferred embodiment determines the remanent fatigue life of each parts of control device for engineering machinery and manipulates with engineering machinery Relation between the remanent fatigue life of each actual crack of each parts of device, uses make the fatigue life of minimum actual crack For the remanent fatigue life of each parts of control device for engineering machinery, meeting Law of Barrel, accuracy is high.

Preferably, the material of described parts each to described control device for engineering machinery carries out fatigue test, obtains described material Expect the fatigue crack growth rate curve corresponding to various crackles, including:

(1) stress intensive factor range of various crackle is calculated, it is considered to the plastically deforming area of Crack Tip end points can be to material Fatigue fracture has conclusive impact, crack tip plastic zone is equivalent to a homogenizing containing phase transition strain and is mingled with, fixed Justice stress intensive factor range Δ K_pcComputing formula be:

${\mathrm{\ΔK}}_{pc}=\left\{\begin{array}{cc}{K}_{pc}^{\max }-K_{yc}-{\mathrm{\ΔK}}_{sc},& R\≤0\\ K_{pc}^{\max }-K_{pc}^{\min },& R>0\end{array}\right.$

In formula

$\begin{array}{c}{\mathrm{\ΔK}}_{sc}=\frac{1}{2\sqrt{2\mathrm{\π}}}{\∫}_A{r}^{-3/2}\[\frac{K_{yc}}{\sqrt{2\mathrm{\π}r}}(3{\sin }^2\mathrm{\α}\cos \mathrm{\α}+2\cos \frac{\mathrm{\α}}{2}\cos \frac{3\mathrm{\α}}{2})\\ +3({\mathrm{\σ}}_{11}-{\mathrm{\σ}}_{22})\sin \mathrm{\α}\sin \frac{5\mathrm{\α}}{2}-6{\mathrm{\σ}}_{12}\sin \mathrm{\α}\cos \frac{5\mathrm{\α}}{2}-({\mathrm{\σ}}_{11}+{\mathrm{\σ}}_{22})\cos \frac{3\mathrm{\α}}{2}\]dA\end{array}$

Wherein,For in fatigue and cyclic load by the calculated stress intensity factor through plastic correcting of maximum load Value,For in fatigue and cyclic load by the calculated stress intensity factor value through plastic correcting of minimum load, K_ycFor far Stress intensity factor under field action, crackle LOAD FOR when opening completely obtains, Δ K_scRepresent crack tip plastic zone The stress intensity factor increment caused, A is the area of the plastic zone around crack tip, and it includes being produced in crack propagation process Raw plastic deformation tail district, σ₁₁、σ₁₂、σ₂₂For the stress in crack tip plastic zone, by crack tip plastic zone stress field Finite element method (fem) analysis obtain, R is the ratio of tensile load and compressive load；

(2) fatigue crack growth rate curve of various crackle is built, based on Paris formula, it is considered to temperature is to tired Labor crackle expands the impact of speed, and the modified computing formulae defining described fatigue crack growth rate is:

T<0℃OR T>T_maxTime,

$\frac{da}{dN}=C{({\mathrm{\&Delta;K}}_{pc}-{\mathrm{\&Delta;K}}_T)}^M$

0℃≤T≤T_maxTime,

$\frac{da}{dN}=C{\left({\mathrm{\&Delta;K}}_{pc}\right)}^M$

In formula, T is test temperature, T_maxFor the maximum temperature set, T_maxSpan be [35 DEG C, 40 DEG C], a is for splitting Stricture of vagina extension length, N is cycle-index, C and M is material constant, Δ K_TFor cracks can spread performance curved surface at the improper temperature of matching The improper temperature fracture threshold value that post analysis obtains, embodies the temperature impact on spreading rate, and Δ K_TSpan [0, Δ K need to be met_pc)。

This preferred embodiment defines the computing formula of stress intensive factor range Δ K_pc, and considers Crack Tip end points Plastically deforming area can have a conclusive impact to the fatigue fracture of material, and crack tip plastic zone is equivalent to one contains The homogenizing of phase transition strain is mingled with, thus the stress intensive factor range Δ K_pc defined can be work perfectly well as a rational mechanics Parameter analyzes the impact of crack tip plastic zone counter stress intensity factor with carrying out quantification；Based on Paris formula, it is contemplated that The temperature impact on fatigue crack expansion speed, and define the modified computing formulae of fatigue crack growth rate, improve meter The precision calculated, and simple and practical.

Preferably, the computing formula of described crack propagation life period N is:

$N={\&Integral;}_{a_0}^{a_c}\frac{1}{C{({\mathrm{\&Delta;K}}_{pc}-{\mathrm{\&Delta;K}}_T)}^M}$

This preferred embodiment determines the computing formula of crack propagation life period N, improves the speed of biometry.

The maximum temperature T of this application scene above-described embodiment_maxIt is set as 35 DEG C, parts each to control device for engineering machinery The precision of fatigue life prediction relatively improve 15%.

Application scenarios 2

Seeing Fig. 1, Fig. 2, the control device for engineering machinery of an embodiment of this application scene, including being arranged on fixed plate First rubber push-pull shaft the 2, second rubber push-pull shaft 20 on 1, control crank 3, control crank oscillating bearing the 4, first joint shaft Holding 40, second joint bearing 41 and fixing seat 5, described fixing seat 5 one end is arranged in fixed plate 1, the other end of fixing seat 5 with The inner ring of control crank oscillating bearing 4 connects, and control crank 3 is fixing with the outer ring of control crank oscillating bearing 4 to be connected, and handles hands The outer ring of handle oscillating bearing 4 is connected fixing with the outer ring of the first oscillating bearing 40, the outer ring of second joint bearing 41, the first rubber The mandrel joint of push-pull shaft 2 and the inner ring of the first oscillating bearing 40 connect, the mandrel joint and second of the second rubber push-pull shaft 20 The inner ring of oscillating bearing 41 connects.

The above embodiment of the present invention simple in construction, only needs two actions of an i.e. controllable device of control handle, operation Convenient, alleviate the labor intensity of operator, also reduce production cost, thus solve above-mentioned technical problem.

Preferably, the described center of control crank oscillating bearing 4, the center of the first oscillating bearing 40, second joint axle Hold the center of 41 in the same plane.

The setting of this preferred embodiment easily facilitates operation.

Preferably, the described center of control crank oscillating bearing 4, the center of the first oscillating bearing 40, second joint axle Holding the rectangular Triangle-Profile in center of 41, the center of control crank oscillating bearing 4 is in the right angle end of right angled triangle.

This preferred embodiment further increases the convenience of operation.

Preferably, described control device for engineering machinery also includes that life appraisal module 6, described life appraisal module 6 include Data preparation module 61 and durability analysis prediction module 62, described data preparation module 61 is used for determining control device for engineering machinery The crack position of each actual crack, size on the actual measurement loads typical spectrum of each parts, each parts of control device for engineering machinery, and right Various crackles carry out geometry simplification classification；Described durability analysis prediction module 62 is for portion each to described control device for engineering machinery The material of part carries out fatigue test, obtains the described material fatigue crack growth rate curve corresponding to various crackles, and then right The fatigue crack growth rate of described actual measurement loads typical spectrum, the crack position of each actual crack, size and various crackle is bent Line carries out Crack growth analysis, determines the crack propagation life period corresponding to various crackles, further according to described cracks can spread Life Cycle number determines the estimated value of the remanent fatigue life of corresponding crackle, finally determines each parts of control device for engineering machinery The estimated value of remanent fatigue life.

This preferred embodiment arranges life appraisal module, and constructs the structural framing of life appraisal module 6, can be real-time The health performance of monitoring reverse-filling smoke exhaust, increases the safety of reverse-filling smoke exhaust running.

Preferably, define corresponding to crackle i=1,2 ... the estimated value collection of the remanent fatigue life of m is { P₁,P₂,…, P_i, the estimated value P of control device for engineering machinery each parts remanent fatigue life_ZIt is then:

P_Z=min_{I=1,2 ... m}{P₁,P₂,…,P_i}。

This preferred embodiment determines the remanent fatigue life of each parts of control device for engineering machinery and manipulates with engineering machinery Relation between the remanent fatigue life of each actual crack of each parts of device, uses make the fatigue life of minimum actual crack For the remanent fatigue life of each parts of control device for engineering machinery, meeting Law of Barrel, accuracy is high.

Preferably, the material of described parts each to described control device for engineering machinery carries out fatigue test, obtains described material Expect the fatigue crack growth rate curve corresponding to various crackles, including:

(1) stress intensive factor range of various crackle is calculated, it is considered to the plastically deforming area of Crack Tip end points can be to material Fatigue fracture has conclusive impact, crack tip plastic zone is equivalent to a homogenizing containing phase transition strain and is mingled with, fixed Justice stress intensive factor range Δ K_pcComputing formula be:

${\mathrm{\&Delta;K}}_{pc}=\left\{\begin{array}{cc}{K}_{pc}^{\max }-K_{yc}-{\mathrm{\&Delta;K}}_{sc},& R\&le;0\\ K_{pc}^{\max }-K_{pc}^{\min },& R>0\end{array}\right.$

In formula

$\begin{array}{c}{\mathrm{\&Delta;K}}_{sc}=\frac{1}{2\sqrt{2\mathrm{\&pi;}}}{\&Integral;}_A{r}^{-3/2}\&lsqb;\frac{K_{yc}}{\sqrt{2\mathrm{\&pi;}r}}(3{\sin }^2\mathrm{\&alpha;}\cos \mathrm{\&alpha;}+2\cos \frac{\mathrm{\&alpha;}}{2}\cos \frac{3\mathrm{\&alpha;}}{2})\\ +3({\mathrm{\&sigma;}}_{11}-{\mathrm{\&sigma;}}_{22})\sin \mathrm{\&alpha;}\sin \frac{5\mathrm{\&alpha;}}{2}-6{\mathrm{\&sigma;}}_{12}\sin \mathrm{\&alpha;}\cos \frac{5\mathrm{\&alpha;}}{2}-({\mathrm{\&sigma;}}_{11}+{\mathrm{\&sigma;}}_{22})\cos \frac{3\mathrm{\&alpha;}}{2}\&rsqb;dA\end{array}$

Wherein,For in fatigue and cyclic load by the calculated stress intensity factor through plastic correcting of maximum load Value,For in fatigue and cyclic load by the calculated stress intensity factor value through plastic correcting of minimum load, K_ycFor far Stress intensity factor under field action, crackle LOAD FOR when opening completely obtains, Δ K_scRepresent crack tip plastic zone The stress intensity factor increment caused, A is the area of the plastic zone around crack tip, and it includes being produced in crack propagation process Raw plastic deformation tail district, σ₁₁、σ₁₂、σ₂₂For the stress in crack tip plastic zone, by crack tip plastic zone stress field Finite element method (fem) analysis obtain, R is the ratio of tensile load and compressive load；

(2) fatigue crack growth rate curve of various crackle is built, based on Paris formula, it is considered to temperature is to tired Labor crackle expands the impact of speed, and the modified computing formulae defining described fatigue crack growth rate is:

T<0℃OR T>T_maxTime,

$\frac{da}{dN}=C{({\mathrm{\&Delta;K}}_{pc}-{\mathrm{\&Delta;K}}_T)}^M$

0℃≤T≤T_maxTime,

$\frac{da}{dN}=C{\left({\mathrm{\&Delta;K}}_{pc}\right)}^M$

In formula, T is test temperature, T_maxFor the maximum temperature set, T_maxSpan be [35 DEG C, 40 DEG C], a is for splitting Stricture of vagina extension length, N is cycle-index, C and M is material constant, Δ K_TFor cracks can spread performance curved surface at the improper temperature of matching The improper temperature fracture threshold value that post analysis obtains, embodies the temperature impact on spreading rate, and Δ K_TSpan [0, Δ K need to be met_pc)。

This preferred embodiment defines the computing formula of stress intensive factor range Δ K_pc, and considers Crack Tip end points Plastically deforming area can have a conclusive impact to the fatigue fracture of material, and crack tip plastic zone is equivalent to one contains The homogenizing of phase transition strain is mingled with, thus the stress intensive factor range Δ K_pc defined can be work perfectly well as a rational mechanics Parameter analyzes the impact of crack tip plastic zone counter stress intensity factor with carrying out quantification；Based on Paris formula, it is contemplated that The temperature impact on fatigue crack expansion speed, and define the modified computing formulae of fatigue crack growth rate, improve meter The precision calculated, and simple and practical.

Preferably, the computing formula of described crack propagation life period N is:

$N={\&Integral;}_{a_0}^{a_c}\frac{1}{C{({\mathrm{\&Delta;K}}_{pc}-{\mathrm{\&Delta;K}}_T)}^M}$

This preferred embodiment determines the computing formula of crack propagation life period N, improves the speed of biometry.

The maximum temperature T of this application scene above-described embodiment_maxIt is set as 36 DEG C, parts each to control device for engineering machinery The precision of fatigue life prediction relatively improve 14%.

Application scenarios 3

Seeing Fig. 1, Fig. 2, the control device for engineering machinery of an embodiment of this application scene, including being arranged on fixed plate First rubber push-pull shaft the 2, second rubber push-pull shaft 20 on 1, control crank 3, control crank oscillating bearing the 4, first joint shaft Holding 40, second joint bearing 41 and fixing seat 5, described fixing seat 5 one end is arranged in fixed plate 1, the other end of fixing seat 5 with The inner ring of control crank oscillating bearing 4 connects, and control crank 3 is fixing with the outer ring of control crank oscillating bearing 4 to be connected, and handles hands The outer ring of handle oscillating bearing 4 is connected fixing with the outer ring of the first oscillating bearing 40, the outer ring of second joint bearing 41, the first rubber The mandrel joint of push-pull shaft 2 and the inner ring of the first oscillating bearing 40 connect, the mandrel joint and second of the second rubber push-pull shaft 20 The inner ring of oscillating bearing 41 connects.

The above embodiment of the present invention simple in construction, only needs two actions of an i.e. controllable device of control handle, operation Convenient, alleviate the labor intensity of operator, also reduce production cost, thus solve above-mentioned technical problem.

Preferably, the described center of control crank oscillating bearing 4, the center of the first oscillating bearing 40, second joint axle Hold the center of 41 in the same plane.

The setting of this preferred embodiment easily facilitates operation.

Preferably, the described center of control crank oscillating bearing 4, the center of the first oscillating bearing 40, second joint axle Holding the rectangular Triangle-Profile in center of 41, the center of control crank oscillating bearing 4 is in the right angle end of right angled triangle.

This preferred embodiment further increases the convenience of operation.

Preferably, described control device for engineering machinery also includes that life appraisal module 6, described life appraisal module 6 include Data preparation module 61 and durability analysis prediction module 62, described data preparation module 61 is used for determining control device for engineering machinery The crack position of each actual crack, size on the actual measurement loads typical spectrum of each parts, each parts of control device for engineering machinery, and right Various crackles carry out geometry simplification classification；Described durability analysis prediction module 62 is for portion each to described control device for engineering machinery The material of part carries out fatigue test, obtains the described material fatigue crack growth rate curve corresponding to various crackles, and then right The fatigue crack growth rate of described actual measurement loads typical spectrum, the crack position of each actual crack, size and various crackle is bent Line carries out Crack growth analysis, determines the crack propagation life period corresponding to various crackles, further according to described cracks can spread Life Cycle number determines the estimated value of the remanent fatigue life of corresponding crackle, finally determines each parts of control device for engineering machinery The estimated value of remanent fatigue life.

This preferred embodiment arranges life appraisal module, and constructs the structural framing of life appraisal module 6, can be real-time The health performance of monitoring reverse-filling smoke exhaust, increases the safety of reverse-filling smoke exhaust running.

Preferably, define corresponding to crackle i=1,2 ... the estimated value collection of the remanent fatigue life of m is { P₁,P₂,…, P_i, the estimated value P of control device for engineering machinery each parts remanent fatigue life_ZIt is then:

P_Z=min_{I=1,2 ... m}{P₁,P₂,…,P_i}。

This preferred embodiment determines the remanent fatigue life of each parts of control device for engineering machinery and manipulates with engineering machinery Relation between the remanent fatigue life of each actual crack of each parts of device, uses make the fatigue life of minimum actual crack For the remanent fatigue life of each parts of control device for engineering machinery, meeting Law of Barrel, accuracy is high.

Preferably, the material of described parts each to described control device for engineering machinery carries out fatigue test, obtains described material Expect the fatigue crack growth rate curve corresponding to various crackles, including:

(1) stress intensive factor range of various crackle is calculated, it is considered to the plastically deforming area of Crack Tip end points can be to material Fatigue fracture has conclusive impact, crack tip plastic zone is equivalent to a homogenizing containing phase transition strain and is mingled with, fixed Justice stress intensive factor range Δ K_pcComputing formula be:

${\mathrm{\&Delta;K}}_{pc}=\left\{\begin{array}{cc}{K}_{pc}^{\max }-K_{yc}-{\mathrm{\&Delta;K}}_{sc},& R\&le;0\\ K_{pc}^{\max }-K_{pc}^{\min },& R>0\end{array}\right.$

In formula

$\begin{array}{c}{\mathrm{\&Delta;K}}_{sc}=\frac{1}{2\sqrt{2\mathrm{\&pi;}}}{\&Integral;}_A{r}^{-3/2}\&lsqb;\frac{K_{yc}}{\sqrt{2\mathrm{\&pi;}r}}(3{\sin }^2\mathrm{\&alpha;}\cos \mathrm{\&alpha;}+2\cos \frac{\mathrm{\&alpha;}}{2}\cos \frac{3\mathrm{\&alpha;}}{2})\\ +3({\mathrm{\&sigma;}}_{11}-{\mathrm{\&sigma;}}_{22})\sin \mathrm{\&alpha;}\sin \frac{5\mathrm{\&alpha;}}{2}-6{\mathrm{\&sigma;}}_{12}\sin \mathrm{\&alpha;}\cos \frac{5\mathrm{\&alpha;}}{2}-({\mathrm{\&sigma;}}_{11}+{\mathrm{\&sigma;}}_{22})\cos \frac{3\mathrm{\&alpha;}}{2}\&rsqb;dA\end{array}$

Wherein,For in fatigue and cyclic load by the calculated stress intensity factor through plastic correcting of maximum load Value,For in fatigue and cyclic load by the calculated stress intensity factor value through plastic correcting of minimum load, K_ycFor far Stress intensity factor under field action, crackle LOAD FOR when opening completely obtains, Δ K_scRepresent crack tip plastic zone The stress intensity factor increment caused, A is the area of the plastic zone around crack tip, and it includes being produced in crack propagation process Raw plastic deformation tail district, σ₁₁、σ₁₂、σ₂₂For the stress in crack tip plastic zone, by crack tip plastic zone stress field Finite element method (fem) analysis obtain, R is the ratio of tensile load and compressive load；

(2) fatigue crack growth rate curve of various crackle is built, based on Paris formula, it is considered to temperature is to tired Labor crackle expands the impact of speed, and the modified computing formulae defining described fatigue crack growth rate is:

T<0℃OR T>T_maxTime,

$\frac{da}{dN}=C{({\mathrm{\&Delta;K}}_{pc}-{\mathrm{\&Delta;K}}_T)}^M$

0℃≤T≤T_maxTime,

$\frac{da}{dN}=C{\left({\mathrm{\&Delta;K}}_{pc}\right)}^M$

In formula, T is test temperature, T_maxFor the maximum temperature set, T_maxSpan be [35 DEG C, 40 DEG C], a is for splitting Stricture of vagina extension length, N is cycle-index, C and M is material constant, Δ K_TFor cracks can spread performance curved surface at the improper temperature of matching The improper temperature fracture threshold value that post analysis obtains, embodies the temperature impact on spreading rate, and Δ K_TSpan [0, Δ K need to be met_pc)。

This preferred embodiment defines the computing formula of stress intensive factor range Δ K_pc, and considers Crack Tip end points Plastically deforming area can have a conclusive impact to the fatigue fracture of material, and crack tip plastic zone is equivalent to one contains The homogenizing of phase transition strain is mingled with, thus the stress intensive factor range Δ K_pc defined can be work perfectly well as a rational mechanics Parameter analyzes the impact of crack tip plastic zone counter stress intensity factor with carrying out quantification；Based on Paris formula, it is contemplated that The temperature impact on fatigue crack expansion speed, and define the modified computing formulae of fatigue crack growth rate, improve meter The precision calculated, and simple and practical.

Preferably, the computing formula of described crack propagation life period N is:

$N={\&Integral;}_{a_0}^{a_c}\frac{1}{C{({\mathrm{\&Delta;K}}_{pc}-{\mathrm{\&Delta;K}}_T)}^M}$

This preferred embodiment determines the computing formula of crack propagation life period N, improves the speed of biometry.

The maximum temperature T of this application scene above-described embodiment_maxIt is set as 38 DEG C, parts each to control device for engineering machinery The precision of fatigue life prediction relatively improve 12%.

Application scenarios 4

Seeing Fig. 1, Fig. 2, the control device for engineering machinery of an embodiment of this application scene, including being arranged on fixed plate First rubber push-pull shaft the 2, second rubber push-pull shaft 20 on 1, control crank 3, control crank oscillating bearing the 4, first joint shaft Holding 40, second joint bearing 41 and fixing seat 5, described fixing seat 5 one end is arranged in fixed plate 1, the other end of fixing seat 5 with The inner ring of control crank oscillating bearing 4 connects, and control crank 3 is fixing with the outer ring of control crank oscillating bearing 4 to be connected, and handles hands The outer ring of handle oscillating bearing 4 is connected fixing with the outer ring of the first oscillating bearing 40, the outer ring of second joint bearing 41, the first rubber The mandrel joint of push-pull shaft 2 and the inner ring of the first oscillating bearing 40 connect, the mandrel joint and second of the second rubber push-pull shaft 20 The inner ring of oscillating bearing 41 connects.

The above embodiment of the present invention simple in construction, only needs two actions of an i.e. controllable device of control handle, operation Convenient, alleviate the labor intensity of operator, also reduce production cost, thus solve above-mentioned technical problem.

Preferably, the described center of control crank oscillating bearing 4, the center of the first oscillating bearing 40, second joint axle Hold the center of 41 in the same plane.

The setting of this preferred embodiment easily facilitates operation.

Preferably, the described center of control crank oscillating bearing 4, the center of the first oscillating bearing 40, second joint axle Holding the rectangular Triangle-Profile in center of 41, the center of control crank oscillating bearing 4 is in the right angle end of right angled triangle.

This preferred embodiment further increases the convenience of operation.

Preferably, described control device for engineering machinery also includes that life appraisal module 6, described life appraisal module 6 include Data preparation module 61 and durability analysis prediction module 62, described data preparation module 61 is used for determining control device for engineering machinery The crack position of each actual crack, size on the actual measurement loads typical spectrum of each parts, each parts of control device for engineering machinery, and right Various crackles carry out geometry simplification classification；Described durability analysis prediction module 62 is for portion each to described control device for engineering machinery The material of part carries out fatigue test, obtains the described material fatigue crack growth rate curve corresponding to various crackles, and then right The fatigue crack growth rate of described actual measurement loads typical spectrum, the crack position of each actual crack, size and various crackle is bent Line carries out Crack growth analysis, determines the crack propagation life period corresponding to various crackles, further according to described cracks can spread Life Cycle number determines the estimated value of the remanent fatigue life of corresponding crackle, finally determines each parts of control device for engineering machinery The estimated value of remanent fatigue life.

This preferred embodiment arranges life appraisal module, and constructs the structural framing of life appraisal module 6, can be real-time The health performance of monitoring reverse-filling smoke exhaust, increases the safety of reverse-filling smoke exhaust running.

Preferably, define corresponding to crackle i=1,2 ... the estimated value collection of the remanent fatigue life of m is { P₁,P₂,…, P_i, the estimated value P of control device for engineering machinery each parts remanent fatigue life_ZIt is then:

P_Z=min_{I=1,2 ... m}{P₁,P₂,…,P_i}。

This preferred embodiment determines the remanent fatigue life of each parts of control device for engineering machinery and manipulates with engineering machinery Relation between the remanent fatigue life of each actual crack of each parts of device, uses make the fatigue life of minimum actual crack For the remanent fatigue life of each parts of control device for engineering machinery, meeting Law of Barrel, accuracy is high.

Preferably, the material of described parts each to described control device for engineering machinery carries out fatigue test, obtains described material Expect the fatigue crack growth rate curve corresponding to various crackles, including:

(1) stress intensive factor range of various crackle is calculated, it is considered to the plastically deforming area of Crack Tip end points can be to material Fatigue fracture has conclusive impact, crack tip plastic zone is equivalent to a homogenizing containing phase transition strain and is mingled with, fixed Justice stress intensive factor range Δ K_pcComputing formula be:

${\mathrm{\&Delta;K}}_{pc}=\left\{\begin{array}{cc}{K}_{pc}^{\max }-K_{yc}-{\mathrm{\&Delta;K}}_{sc},& R\&le;0\\ K_{pc}^{\max }-K_{pc}^{\min },& R>0\end{array}\right.$

In formula

$\begin{array}{c}{\mathrm{\&Delta;K}}_{sc}=\frac{1}{2\sqrt{2\mathrm{\&pi;}}}{\&Integral;}_A{r}^{-3/2}\&lsqb;\frac{K_{yc}}{\sqrt{2\mathrm{\&pi;}r}}(3{\sin }^2\mathrm{\&alpha;}\cos \mathrm{\&alpha;}+2\cos \frac{\mathrm{\&alpha;}}{2}\cos \frac{3\mathrm{\&alpha;}}{2})\\ +3({\mathrm{\&sigma;}}_{11}-{\mathrm{\&sigma;}}_{22})\sin \mathrm{\&alpha;}\sin \frac{5\mathrm{\&alpha;}}{2}-6{\mathrm{\&sigma;}}_{12}\sin \mathrm{\&alpha;}\cos \frac{5\mathrm{\&alpha;}}{2}-({\mathrm{\&sigma;}}_{11}+{\mathrm{\&sigma;}}_{22})\cos \frac{3\mathrm{\&alpha;}}{2}\&rsqb;dA\end{array}$

Wherein,For in fatigue and cyclic load by the calculated stress intensity factor through plastic correcting of maximum load Value,For in fatigue and cyclic load by the calculated stress intensity factor value through plastic correcting of minimum load, K_ycFor far Stress intensity factor under field action, crackle LOAD FOR when opening completely obtains, Δ K_scRepresent crack tip plastic zone The stress intensity factor increment caused, A is the area of the plastic zone around crack tip, and it includes being produced in crack propagation process Raw plastic deformation tail district, σ₁₁、σ₁₂、σ₂₂For the stress in crack tip plastic zone, by crack tip plastic zone stress field Finite element method (fem) analysis obtain, R is the ratio of tensile load and compressive load；

(2) fatigue crack growth rate curve of various crackle is built, based on Paris formula, it is considered to temperature is to tired Labor crackle expands the impact of speed, and the modified computing formulae defining described fatigue crack growth rate is:

T<0℃OR T>T_maxTime,

$\frac{da}{dN}=C{({\mathrm{\&Delta;K}}_{pc}-{\mathrm{\&Delta;K}}_T)}^M$

0℃≤T≤T_maxTime,

$\frac{da}{dN}=C{\left({\mathrm{\&Delta;K}}_{pc}\right)}^M$

In formula, T is test temperature, T_maxFor the maximum temperature set, T_maxSpan be [35 DEG C, 40 DEG C], a is for splitting Stricture of vagina extension length, N is cycle-index, C and M is material constant, Δ K_TFor cracks can spread performance curved surface at the improper temperature of matching The improper temperature fracture threshold value that post analysis obtains, embodies the temperature impact on spreading rate, and Δ K_TSpan [0, Δ K need to be met_pc)。

This preferred embodiment defines the computing formula of stress intensive factor range Δ K_pc, and considers Crack Tip end points Plastically deforming area can have a conclusive impact to the fatigue fracture of material, and crack tip plastic zone is equivalent to one contains The homogenizing of phase transition strain is mingled with, thus the stress intensive factor range Δ K_pc defined can be work perfectly well as a rational mechanics Parameter analyzes the impact of crack tip plastic zone counter stress intensity factor with carrying out quantification；Based on Paris formula, it is contemplated that The temperature impact on fatigue crack expansion speed, and define the modified computing formulae of fatigue crack growth rate, improve meter The precision calculated, and simple and practical.

Preferably, the computing formula of described crack propagation life period N is:

$N={\&Integral;}_{a_0}^{a_c}\frac{1}{C{({\mathrm{\&Delta;K}}_{pc}-{\mathrm{\&Delta;K}}_T)}^M}$

This preferred embodiment determines the computing formula of crack propagation life period N, improves the speed of biometry.

The maximum temperature T of this application scene above-described embodiment_maxIt is set as 39 DEG C, parts each to control device for engineering machinery The precision of fatigue life prediction relatively improve 11%.

Application scenarios 5

Seeing Fig. 1, Fig. 2, the control device for engineering machinery of an embodiment of this application scene, including being arranged on fixed plate First rubber push-pull shaft the 2, second rubber push-pull shaft 20 on 1, control crank 3, control crank oscillating bearing the 4, first joint shaft Holding 40, second joint bearing 41 and fixing seat 5, described fixing seat 5 one end is arranged in fixed plate 1, the other end of fixing seat 5 with The inner ring of control crank oscillating bearing 4 connects, and control crank 3 is fixing with the outer ring of control crank oscillating bearing 4 to be connected, and handles hands The outer ring of handle oscillating bearing 4 is connected fixing with the outer ring of the first oscillating bearing 40, the outer ring of second joint bearing 41, the first rubber The mandrel joint of push-pull shaft 2 and the inner ring of the first oscillating bearing 40 connect, the mandrel joint and second of the second rubber push-pull shaft 20 The inner ring of oscillating bearing 41 connects.

The above embodiment of the present invention simple in construction, only needs two actions of an i.e. controllable device of control handle, operation Convenient, alleviate the labor intensity of operator, also reduce production cost, thus solve above-mentioned technical problem.

Preferably, the described center of control crank oscillating bearing 4, the center of the first oscillating bearing 40, second joint axle Hold the center of 41 in the same plane.

The setting of this preferred embodiment easily facilitates operation.

Preferably, the described center of control crank oscillating bearing 4, the center of the first oscillating bearing 40, second joint axle Holding the rectangular Triangle-Profile in center of 41, the center of control crank oscillating bearing 4 is in the right angle end of right angled triangle.

This preferred embodiment further increases the convenience of operation.

Preferably, described control device for engineering machinery also includes that life appraisal module 6, described life appraisal module 6 include Data preparation module 61 and durability analysis prediction module 62, described data preparation module 61 is used for determining control device for engineering machinery The crack position of each actual crack, size on the actual measurement loads typical spectrum of each parts, each parts of control device for engineering machinery, and right Various crackles carry out geometry simplification classification；Described durability analysis prediction module 62 is for portion each to described control device for engineering machinery The material of part carries out fatigue test, obtains the described material fatigue crack growth rate curve corresponding to various crackles, and then right The fatigue crack growth rate of described actual measurement loads typical spectrum, the crack position of each actual crack, size and various crackle is bent Line carries out Crack growth analysis, determines the crack propagation life period corresponding to various crackles, further according to described cracks can spread Life Cycle number determines the estimated value of the remanent fatigue life of corresponding crackle, finally determines each parts of control device for engineering machinery The estimated value of remanent fatigue life.

This preferred embodiment arranges life appraisal module, and constructs the structural framing of life appraisal module 6, can be real-time The health performance of monitoring reverse-filling smoke exhaust, increases the safety of reverse-filling smoke exhaust running.

Preferably, define corresponding to crackle i=1,2 ... the estimated value collection of the remanent fatigue life of m is { P₁,P₂,…, P_i, the estimated value P of control device for engineering machinery each parts remanent fatigue life_ZIt is then:

P_Z=min_{I=1,2 ... m}{P₁,P₂,…,P_i}。

This preferred embodiment determines the remanent fatigue life of each parts of control device for engineering machinery and manipulates with engineering machinery Relation between the remanent fatigue life of each actual crack of each parts of device, uses make the fatigue life of minimum actual crack For the remanent fatigue life of each parts of control device for engineering machinery, meeting Law of Barrel, accuracy is high.

Preferably, the material of described parts each to described control device for engineering machinery carries out fatigue test, obtains described material Expect the fatigue crack growth rate curve corresponding to various crackles, including:

(1) stress intensive factor range of various crackle is calculated, it is considered to the plastically deforming area of Crack Tip end points can be to material Fatigue fracture has conclusive impact, crack tip plastic zone is equivalent to a homogenizing containing phase transition strain and is mingled with, fixed Justice stress intensive factor range Δ K_pcComputing formula be:

${\mathrm{\&Delta;K}}_{pc}=\left\{\begin{array}{cc}{K}_{pc}^{\max }-K_{yc}-{\mathrm{\&Delta;K}}_{sc},& R\&le;0\\ K_{pc}^{\max }-K_{pc}^{\min },& R>0\end{array}\right.$

In formula

$\begin{array}{c}{\mathrm{\&Delta;K}}_{sc}=\frac{1}{2\sqrt{2\mathrm{\&pi;}}}{\&Integral;}_A{r}^{-3/2}\&lsqb;\frac{K_{yc}}{\sqrt{2\mathrm{\&pi;}r}}(3{\sin }^2\mathrm{\&alpha;}\cos \mathrm{\&alpha;}+2\cos \frac{\mathrm{\&alpha;}}{2}\cos \frac{3\mathrm{\&alpha;}}{2})\\ +3({\mathrm{\&sigma;}}_{11}-{\mathrm{\&sigma;}}_{22})\sin \mathrm{\&alpha;}\sin \frac{5\mathrm{\&alpha;}}{2}-6{\mathrm{\&sigma;}}_{12}\sin \mathrm{\&alpha;}\cos \frac{5\mathrm{\&alpha;}}{2}-({\mathrm{\&sigma;}}_{11}+{\mathrm{\&sigma;}}_{22})\cos \frac{3\mathrm{\&alpha;}}{2}\&rsqb;dA\end{array}$

Wherein,For in fatigue and cyclic load by the calculated stress intensity factor through plastic correcting of maximum load Value,For in fatigue and cyclic load by the calculated stress intensity factor value through plastic correcting of minimum load, K_ycFor far Stress intensity factor under field action, crackle LOAD FOR when opening completely obtains, Δ K_scRepresent crack tip plastic zone The stress intensity factor increment caused, A is the area of the plastic zone around crack tip, and it includes being produced in crack propagation process Raw plastic deformation tail district, σ₁₁、σ₁₂、σ₂₂For the stress in crack tip plastic zone, by crack tip plastic zone stress field Finite element method (fem) analysis obtain, R is the ratio of tensile load and compressive load；

(2) fatigue crack growth rate curve of various crackle is built, based on Paris formula, it is considered to temperature is to tired Labor crackle expands the impact of speed, and the modified computing formulae defining described fatigue crack growth rate is:

T<0℃OR T>T_maxTime,

$\frac{da}{dN}=C{({\mathrm{\&Delta;K}}_{pc}-{\mathrm{\&Delta;K}}_T)}^M$

0℃≤T≤T_maxTime,

$\frac{da}{dN}=C{\left({\mathrm{\&Delta;K}}_{pc}\right)}^M$

In formula, T is test temperature, T_maxFor the maximum temperature set, T_maxSpan be [35 DEG C, 40 DEG C], a is for splitting Stricture of vagina extension length, N is cycle-index, C and M is material constant, Δ K_TFor cracks can spread performance curved surface at the improper temperature of matching The improper temperature fracture threshold value that post analysis obtains, embodies the temperature impact on spreading rate, and Δ K_TSpan [0, Δ K need to be met_pc)。

This preferred embodiment defines the computing formula of stress intensive factor range Δ K_pc, and considers Crack Tip end points Plastically deforming area can have a conclusive impact to the fatigue fracture of material, and crack tip plastic zone is equivalent to one contains The homogenizing of phase transition strain is mingled with, thus the stress intensive factor range Δ K_pc defined can be work perfectly well as a rational mechanics Parameter analyzes the impact of crack tip plastic zone counter stress intensity factor with carrying out quantification；Based on Paris formula, it is contemplated that The temperature impact on fatigue crack expansion speed, and define the modified computing formulae of fatigue crack growth rate, improve meter The precision calculated, and simple and practical.

Preferably, the computing formula of described crack propagation life period N is:

$N={\&Integral;}_{a_0}^{a_c}\frac{1}{C{({\mathrm{\&Delta;K}}_{pc}-{\mathrm{\&Delta;K}}_T)}^M}$

This preferred embodiment determines the computing formula of crack propagation life period N, improves the speed of biometry.

The maximum temperature T of this application scene above-described embodiment_maxIt is set as 40 DEG C, parts each to control device for engineering machinery The precision of fatigue life prediction relatively improve 10%.

Last it should be noted that, use above scene is only in order to illustrate technical scheme, rather than to the present invention The restriction of protection domain, although having made to explain to the present invention with reference to preferred application scene, the ordinary skill people of this area Member should be appreciated that and can modify technical scheme or equivalent, without deviating from technical solution of the present invention Spirit and scope.

Claims (3)

1. a control device for engineering machinery, is characterized in that, including the first rubber push-pull shaft being arranged in fixed plate, the second rubber Glue push-pull shaft, control crank, control crank oscillating bearing, the first oscillating bearing, second joint bearing and fixing seat, described fixing Seat one end is arranged in fixed plate, and the other end of fixing seat is connected with the inner ring of control crank oscillating bearing, control crank and behaviour The outer ring of vertical handle joint bearing is fixing to be connected, the outer ring of control crank oscillating bearing and the outer ring of the first oscillating bearing, second The outer ring of oscillating bearing connects fixing, and the mandrel joint of the first rubber push-pull shaft and the inner ring of the first oscillating bearing connect, and second The mandrel joint of rubber push-pull shaft is connected with the inner ring of second joint bearing.

A kind of control device for engineering machinery the most according to claim 1, is characterized in that, described control crank oscillating bearing Center, the center of the first oscillating bearing, second joint bearing center in the same plane.

A kind of control device for engineering machinery the most according to claim 2, is characterized in that, described control crank oscillating bearing Center, the center of the first oscillating bearing, the rectangular Triangle-Profile in center of second joint bearing, control crank oscillating bearing Center be in the right angle end of right angled triangle.