CN105424501A - Rigidity evaluation method and rigidity evaluation device of crane chassis - Google Patents

Rigidity evaluation method and rigidity evaluation device of crane chassis Download PDF

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Publication number
CN105424501A
CN105424501A CN201510980153.1A CN201510980153A CN105424501A CN 105424501 A CN105424501 A CN 105424501A CN 201510980153 A CN201510980153 A CN 201510980153A CN 105424501 A CN105424501 A CN 105424501A
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rigidity
vertical
bendind
underframe
crane
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CN105424501B (en
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刘洪礼
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Hebei Leisa Heavy Construction Machinery Co Ltd
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Beiqi Foton Motor Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Control And Safety Of Cranes (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention discloses a rigidity evaluation method and a rigidity evaluation device of a crane chassis. The rigidity evaluation method includes the following steps: 1) calculating vertical flexural rigidity of the chassis on the basis of vertical displacement change quantity and hoisting load change quantity of a flange ring on the chassis before and after the chassis hoisting an object; 2) calculating torsional rigidity of the chassis on the basis of change quantities of deflection angle and hoisting moment of the flange ring before and after the chassis hoisting the object; 3) determining a vertical flexural rigidity evaluation index on the basis of maximum load, longitudinal span of supporting legs, transversal span of supporting legs and vertical flexural rigidity constant of the crane, and determining a torsional rigidity evaluation index on the basis of the maximum load moment and torsional rigidity constant of the crane; and 4) if the vertical flexural rigidity satisfies the vertical flexural rigidity evaluation index, regarding the vertical flexural rigidity as qualified, and if the torsional rigidity satisfies the torsional rigidity evaluation index, regarding the torsional rigidity as qualified. By means of the method and the device, rigidity of the crane chassis can be accurately verified, so that use safety and rigidity qualification of the verified chassis are ensured.

Description

Crane underframe rigidity assessment method and device
Technical field
The present invention relates to mechanical measurement technique field, more particularly, relate to a kind of crane underframe rigidity assessment method and device.
Background technology
Truck-mounted crane underframe is the basis of crane job, and its intensity is the sole criterion of test crane underframe.Due to the universal of high-strength steel and application, under normal circumstances, crane underframe can meet certain intensity, but usually while meeting intensity, the rigidity difference of each crane underframe is very large.
Rigidity refers to the power required for unit deformation, is exactly restriction power to produce the character of being out of shape, the wherein inward nature of referred to structure.For the handling characteristics of derrick tower, if desired improve rigidity, then need to adjust materials and structures, while adding large rigidity, also can increase cost, and rigidity is unfavorable for too greatly the reduction of cost; But rigidity is too little, lifting performance can be affected.
In sum, how testing and assessing for the rigidity of crane underframe, is current those skilled in the art's problem demanding prompt solution.
Summary of the invention
In view of this, the object of this invention is to provide a kind of crane underframe rigidity assessment method, the method can be tested and assessed to the rigidity of crane underframe, judges the rigidity property of underframe.
Another object of the present invention is to provide a kind of crane underframe rigidity assessment device, and this device can be assessed the rigidity of crane underframe automatically, judges the rigidity property of underframe.
To achieve these goals, the invention provides following technical scheme:
A kind of crane underframe rigidity assessment method, comprising:
The perpendicular displacement variable quantity of described underframe upper flange circle and lifting capacity variable quantity before hanging object carrier based on underframe and after hanging object carrier, calculate the vertical bendind rigidity of described underframe, the deflection angle of described flange circle and hoisting moment variable quantity, calculate the torsional rigidity of described underframe before hanging object carrier based on described underframe and after hanging object carrier;
Vertical bendind rigidity evaluation index is determined with vertical bendind rigidity constant, based on maximum hoisting moment and the torsional rigidity constant determination torsional rigidity evaluation index of described crane based on the biggest lifting capacity of described crane, the longitudinal span of supporting leg, supporting leg horizontal span;
If described vertical bendind rigidity meets described vertical bendind rigidity evaluation index, then described vertical bendind rigidity is qualified; If described torsional rigidity meets described torsional rigidity evaluation index, then described torsional rigidity is qualified.
Preferably, hang and carry under state, respectively after object leaves in face of ground and object leaves ground, obtain the perpendicular displacement of 2 on the vertical cross-section of crane arm place of described flange circle;
According to formula Δ f z=0.5 (A-C)+0.5 (B-D), calculates described perpendicular displacement variation delta f z, according to formula Δ θ=tan -1[(B-D)/L-(A-C)/L] * 180/ π, calculates described deflection angle Δ θ;
Wherein, A is that described object leaves the height of first on the vertical cross-section of crane arm place of described flange circle in face of ground, C is the height of after described object leaves ground described first, B is the height that described object leaves described flange circle second point on the vertical cross-section of crane arm place in face of ground, and D is the height of described second point after described object leaves ground.
Preferably, the vertical bendind rigidity of the described underframe of described calculating, comprises according to formula K g=Δ G/ Δ f zcalculate, wherein, K gfor described vertical bendind rigidity, Δ G is described lifting capacity variable quantity, Δ f zfor described perpendicular displacement variable quantity;
The torsional rigidity of the described underframe of described calculating, comprises according to formula K m=Δ M/ Δ θ calculates, wherein, and K mfor described torsional rigidity, Δ M is described hoisting moment variable quantity, and Δ θ is described deflection angle.
Preferably, the longitudinal span of the described biggest lifting capacity based on described crane, supporting leg, supporting leg horizontal span determine vertical bendind rigidity evaluation index with vertical bendind rigidity constant, comprising:
Determine that described vertical bendind rigidity evaluation index is
Wherein, K gfor described vertical bendind rigidity, G maxfor the described biggest lifting capacity, L 1for the longitudinal span of described supporting leg, L 2for described supporting leg horizontal span, K cfor described vertical bendind rigidity constant.
Preferably, described vertical bendind rigidity constant K caccording to described biggest lifting capacity G maxdetermine, and with described biggest lifting capacity G maxvariation tendency contrary;
Wherein, when the described biggest lifting capacity is 20 to 35T, the scope of described vertical bendind rigidity constant is 900 to 700; When the described biggest lifting capacity is 40 to 60T, the scope of described vertical bendind rigidity constant is 600 to 500; When the described biggest lifting capacity is 70 to 80T, the scope of described vertical bendind rigidity constant is 400 to 350.
Preferably, the described maximum hoisting moment based on described crane and torsional rigidity constant determination torsional rigidity evaluation index, comprising:
Determine that described torsional rigidity evaluation index is K m>=M max/ K θ;
Wherein, K mfor described torsional rigidity, M maxfor described maximum hoisting moment, K θfor described torsional rigidity constant.
Preferably, described torsional rigidity constant K θaccording to described maximum hoisting moment M maxdetermine, and with described maximum hoisting moment M maxvariation tendency identical;
Wherein, when described maximum hoisting moment is 20 to 35T, described torsional rigidity constant is 0.7; When described maximum hoisting moment is 40 to 60T, described torsional rigidity constant is 0.8; When described maximum hoisting moment is 70 to 80T, described torsional rigidity constant is 0.9.
A kind of crane underframe rigidity assessment device, comprising:
Computing module, for perpendicular displacement variable quantity and the lifting capacity variable quantity of described underframe upper flange circle before hanging object carrier based on underframe and after hanging object carrier, calculate the vertical bendind rigidity of described underframe, the deflection angle of described flange circle and hoisting moment variable quantity, calculate the torsional rigidity of described underframe before hanging object carrier based on underframe and after hanging object carrier;
Formulate evaluation criterion module, for determining vertical bendind rigidity evaluation index with vertical bendind rigidity constant, based on maximum hoisting moment and the torsional rigidity constant determination torsional rigidity evaluation index of described crane based on the biggest lifting capacity of described crane, the longitudinal span of supporting leg, supporting leg horizontal span;
Evaluation module, for judging according to described vertical bendind rigidity evaluation index and described torsional rigidity evaluation index, if described vertical bendind rigidity meets described vertical bendind rigidity evaluation index, then described vertical bendind rigidity is qualified; If described torsional rigidity meets described torsional rigidity evaluation index, then described torsional rigidity is qualified.
Preferably, described computing module comprises:
Obtain subelement, under hanging the state of carrying, respectively after object leaves in face of ground and object leaves ground, obtain described flange the circle perpendicular displacement of 2 and deflection angle of described flange circle on the vertical cross-section of crane arm place;
Computation subunit, for calculating described vertical bendind rigidity K g=Δ G/ Δ f z, calculate described torsional rigidity K m=Δ M/ Δ θ; Wherein, Δ G is described lifting capacity variable quantity, and Δ M is described hoisting moment variable quantity, Δ f zfor described perpendicular displacement variable quantity, according to formula Δ f z=0.5 (A-C)+0.5 (B-D) calculates, and Δ θ is described deflection angle, according to formula Δ θ=tan -1[(B-D)/L-(A-C)/L] * 180/ π calculate;
Wherein, A is that described object leaves the height of first on the vertical cross-section of crane arm place of described flange circle in face of ground, C is the height of after described object leaves ground described first, B is the height that described object leaves described flange circle second point on the vertical cross-section of crane arm place in face of ground, and D is the height of described second point after described object leaves ground.
Preferably, formulate evaluation criterion module to comprise:
Vertical bendind rigidity evaluation index determining unit, for determining that described vertical bendind rigidity evaluation index is wherein, K gfor described vertical bendind rigidity, G maxfor the described biggest lifting capacity, L 1for the longitudinal span of described supporting leg, L 2for described supporting leg horizontal span, K cfor described vertical bendind rigidity constant, described vertical bendind rigidity constant K cwith described biggest lifting capacity G maxvariation tendency contrary;
Torsional rigidity evaluation index determining unit, for determining that described torsional rigidity evaluation index is K g>=M max/ K θ, wherein, K mfor described torsional rigidity, M maxfor described maximum hoisting moment, K θfor described torsional rigidity constant, described torsional rigidity constant K θwith described maximum hoisting moment M maxvariation tendency identical.
Crane underframe rigidity assessment method provided by the invention and device, before hanging object carrier by underframe and hang the perpendicular displacement variable quantity after object carrier, lifting capacity variable quantity, deflection angle and the hoisting moment variable quantity of flange circle calculate vertical bendind rigidity and the torsional rigidity of crane underframe, by the biggest lifting capacity of crane, the longitudinal span of supporting leg, supporting leg horizontal span obtains vertical bendind rigidity evaluation index with straight bendind rigidity constant, by maximum hoisting moment and the torsional rigidity constant determination torsional rigidity evaluation index of crane, and check vertical bendind rigidity and torsional rigidity by vertical bendind rigidity evaluation index respectively with torsional rigidity evaluation index, the check result of vertical bendind rigidity and torsional rigidity can be obtained.
Accurately can be checked the rigidity of crane underframe by the method, ensure the underframe use safety after by check.A kind of crane underframe rigidity assessment device provided by the present invention can be checked underframe rigidity automatically by computing module, formulation evaluation criterion module and evaluation module, ensures the rigidity qualification of underframe.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the process flow diagram of the specific embodiment one of crane underframe rigidity assessment method provided by the present invention;
Fig. 2 is the process flow diagram of the specific embodiment two of crane underframe rigidity assessment method provided by the present invention;
Fig. 3 is the schematic diagram of crane underframe provided by the present invention;
Fig. 4 is the schematic diagram of the specific embodiment of crane underframe rigidity assessment device provided by the present invention.
In upper Fig. 1-4:
1 be flange circle, 2 being supporting leg, 10 being computing module, 101 being computation subunit for obtaining subelement, 102,20 being vertical bendind rigidity evaluation index determination module for formulating evaluation criterion module, 201,202 be torsional rigidity evaluation index determining unit, 30 be evaluation module.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Core of the present invention is to provide a kind of crane underframe rigidity assessment method, and the method can be tested and assessed to the rigidity of crane underframe, judges the rigidity property of underframe.
Another core of the present invention is to provide a kind of crane underframe rigidity assessment device, and this device can be assessed the rigidity of crane underframe automatically, judges the rigidity property of underframe.
Please refer to Fig. 1 to Fig. 4, Fig. 1 is the process flow diagram of the specific embodiment one of crane underframe rigidity assessment method provided by the present invention; Fig. 2 is the process flow diagram of the specific embodiment two of crane underframe rigidity assessment method provided by the present invention; Fig. 3 is the schematic diagram of crane underframe provided by the present invention; Fig. 4 is the schematic diagram of the specific embodiment of crane underframe rigidity assessment device provided by the present invention.
A kind of crane underframe rigidity assessment method provided by the present invention, be mainly used in the Stiffness evaluation of crane underframe, underframe be provided with flange circle 1 and supporting leg 2, this check process is mainly through measuring the flange circle 1 on underframe and check.The step of the method comprises:
Step S1: before hanging object carrier based on underframe and hang perpendicular displacement variable quantity and the lifting capacity variable quantity of underframe upper flange circle 1 after object carrier, calculate the vertical bendind rigidity of underframe, with the deflection angle and the hoisting moment variable quantity that hang object carrier rear flange circle 1 before hanging object carrier based on underframe, calculate the torsional rigidity of underframe;
Step S2: determine vertical bendind rigidity evaluation index with vertical bendind rigidity constant, based on maximum hoisting moment and the torsional rigidity constant determination torsional rigidity evaluation index of crane based on the biggest lifting capacity of crane, the longitudinal span of supporting leg, supporting leg horizontal span;
Step S3: if vertical bendind rigidity meets vertical bendind rigidity evaluation index, then vertical bendind rigidity is qualified; If torsional rigidity meets torsional rigidity evaluation index, then torsional rigidity is qualified.
Needs should be mentioned that, due to the precedence relationship between above-mentioned steps S1 and step S2 not on subsistence logic, so step S1 can be upon step s 2, namely the order of step S1 and step S2 can be put upside down, do not affect the enforcement of the method, and the label in the present embodiment be only used to can be corresponding clear with accompanying drawing.
Before hanging object carrier by underframe in crane underframe rigidity assessment method provided by the present invention and hang the perpendicular displacement variable quantity after object carrier, lifting capacity variable quantity, deflection angle and the hoisting moment variable quantity of flange circle 1 calculate vertical bendind rigidity and the torsional rigidity of crane underframe, by the biggest lifting capacity of crane, the longitudinal span of supporting leg, supporting leg horizontal span obtains vertical bendind rigidity evaluation index with straight bendind rigidity constant, by maximum hoisting moment and the torsional rigidity constant determination torsional rigidity evaluation index of crane, and check vertical bendind rigidity and torsional rigidity respectively by vertical bendind rigidity evaluation index torsional rigidity evaluation index, the check result of vertical bendind rigidity and torsional rigidity can be obtained.
Accurately can be checked the rigidity of crane underframe by the method, ensure the underframe use safety after by check.
Consider to there is gap between pivoting support on underframe and supporting leg 2, may have an impact to the perpendicular displacement variable quantity of flange circle 1 and deflection angle before and after lift heavy, so need the impact avoiding above-mentioned pivoting support and supporting leg gap.
In a preferred embodiment provided by the present invention, the obtain manner for perpendicular displacement variable quantity and deflection angle is specific as follows:
Hang and carry under state, respectively after object leaves in face of ground and object leaves ground, obtain flange circle 1 perpendicular displacement of 2 on the vertical cross-section of crane arm place;
According to formula Δ f z=0.5 (A-C)+0.5 (B-D), calculates perpendicular displacement variation delta f z, according to formula Δ θ=tan -1[(B-D)/L-(A-C)/L] * 180/ π, calculates deflection angle Δ θ;
Wherein, A is that object leaves ground forward flange circle 1 height of first on the vertical cross-section of crane arm place, C is the height that object leaves at behind ground first, B is the height that object leaves ground forward flange circle 1 second point on the vertical cross-section of crane arm place, and D is the height that object leaves second point behind ground.
The acquisition state that above-described embodiment provides is hang to carry object under state and leave in face of ground and object leaves two states behind ground, needs should be mentioned that, first state is that object is in and hangs the state of carrying but object leaves ground not yet, namely the supporting leg 2 of underframe stretches out, and arm is in lifting state, in this case, there is not above-mentioned gap, so eliminated the impact in gap; Second state is that object is in and hangs the state of carrying and object leaves ground, and crane has been in and finally hangs the state of carrying.
On the basis of each embodiment above-mentioned, the present embodiment is introduced the vertical bendind rigidity and torsional rigidity that how to calculate underframe, comprises according to formula K g=Δ G/ Δ f zcalculate vertical bendind rigidity, according to formula K m=Δ M/ Δ θ calculates torsional rigidity;
Wherein, K gfor vertical bendind rigidity, Δ G is lifting capacity variable quantity, Δ f zfor perpendicular displacement variable quantity; K mfor torsional rigidity, Δ M is hoisting moment variable quantity, and Δ θ is deflection angle.
In each embodiment above-mentioned, determine vertical bendind rigidity evaluation index by the biggest lifting capacity of crane, the longitudinal span of supporting leg, supporting leg horizontal span with vertical bendind rigidity constant, this step specifically can comprise:
Determine that vertical bendind rigidity evaluation index is
Wherein, K gfor vertical bendind rigidity, G maxfor the biggest lifting capacity, L 1for the longitudinal span of supporting leg, L 2for supporting leg horizontal span, K cfor vertical bendind rigidity constant.
Need it is to be noted that K gfor needing the vertical bendind rigidity of checking, this vertical bendind rigidity needs to be more than or equal to the formulae results on right side can by the check of rigidity, namely on the right side of inequality it is the minimum value of vertical bendind rigidity permissible value.
The present embodiment obtains vertical bendind rigidity evaluation index by the biggest lifting capacity, the longitudinal span of supporting leg, supporting leg horizontal span with vertical bendind rigidity constant, in the present embodiment, vertical bendind rigidity constant is empirical constant, can carry out value according to crane model or performance etc.
On the basis of above-described embodiment, more reasonably span can be set for vertical bendind rigidity constant, such as, vertical bendind rigidity constant K ccan according to biggest lifting capacity G maxdetermine, and variation tendency and biggest lifting capacity G maxvariation tendency contrary; Variation tendency can with reference to following relation particularly:
When the biggest lifting capacity is 20 to 35T, the scope of vertical bendind rigidity constant is 900 to 700; When the biggest lifting capacity is 40 to 60T, the scope of vertical bendind rigidity constant is 600 to 500; When the biggest lifting capacity is 70 to 80T, the scope of vertical bendind rigidity constant is 400 to 350.
In the choosing method to vertical bendind rigidity constant that above-described embodiment provides, by the vertical variation tendency of bendind rigidity constant is set to contrary with the variation tendency of the biggest lifting capacity, can obtain comparatively rationally with vertical bendind rigidity evaluation index accurately.Certainly, according to the difference of actual conditions and the setting of experience, vertical bendind rigidity constant can obtain by different way.
In each embodiment above-mentioned, based on maximum hoisting moment and the torsional rigidity constant determination torsional rigidity evaluation index of crane, particularly, can comprise:
Determine that torsional rigidity evaluation index is K m>=M max/ K θ;
Wherein, K mfor torsional rigidity, M maxfor maximum hoisting moment, K θfor torsional rigidity constant.
Similar with the defining method of vertical bendind rigidity evaluation index, the above-mentioned inequality of torsional rigidity demand fulfillment can by checking.In the present embodiment, torsional rigidity constant is empirical constant, can carry out value according to crane model or performance etc.
Similarly, torsional rigidity constant K θaccording to maximum hoisting moment M maxdetermine, and variation tendency and maximum hoisting moment M maxvariation tendency identical;
Wherein, when maximum hoisting moment is 20 to 35T, torsional rigidity constant is 0.7; When maximum hoisting moment is 40 to 60T, torsional rigidity constant is 0.8; When maximum hoisting moment is 70 to 80T, torsional rigidity constant is 0.9.
Optionally, the selected of torsional rigidity constant does not need the relation following above-mentioned citing completely, a demand fulfillment and maximum hoisting moment M maxvariation tendency identical, can adjust according to service condition in specific implementation process.
In the choosing method to antitorque stiffness constant that above-described embodiment provides, by the value of torsional rigidity constant is set to identical with maximum lifting torque, can obtain comparatively rationally and torsional rigidity evaluation index accurately.Certainly, according to the difference of actual conditions and the setting of experience, torsional rigidity constant can obtain by different way.
Except the crane underframe rigidity assessment method disclosed in above-described embodiment, the present invention also provides a kind of crane underframe rigidity assessment device, and this device is used for realizing crane underframe rigidity assessment method.Crane underframe rigidity assessment device mainly comprises computing module 10, formulates evaluation criterion module 20 and evaluation module 30.
Computing module 10 is for before hanging object carrier based on underframe and hang perpendicular displacement variable quantity and the lifting capacity variable quantity of underframe upper flange circle 1 after object carrier, calculate the vertical bendind rigidity of underframe, with the deflection angle and the hoisting moment variable quantity that hang object carrier rear flange circle 1 before hanging object carrier based on underframe, calculate the torsional rigidity of underframe.
Formulate evaluation criterion module 20 for determining vertical bendind rigidity evaluation index with vertical bendind rigidity constant, based on maximum hoisting moment and the torsional rigidity constant determination torsional rigidity evaluation index of crane based on the biggest lifting capacity of crane, the longitudinal span of supporting leg, supporting leg horizontal span.
Evaluation module 30 is for judging according to vertical bendind rigidity evaluation index and torsional rigidity evaluation index, if vertical bendind rigidity meets vertical bendind rigidity evaluation index, then vertical bendind rigidity is qualified; If torsional rigidity meets torsional rigidity evaluation index, then torsional rigidity is qualified.
Wherein, computing module 10, formulation evaluation criterion module 20 are all connected with evaluation module 30, evaluation module 30 is for obtaining vertical bendind rigidity and the torsional rigidity of the underframe of computing module 10 transmission, and obtain the vertical bendind rigidity evaluation index and torsional rigidity evaluation index of formulating the transmission of evaluation criterion module 20, and corresponding comparison is carried out to the two.
Said apparatus calculates vertical bendind rigidity and the torsional rigidity of underframe by computing module 10, and obtain vertical bendind rigidity evaluation index torsional rigidity evaluation index by formulating evaluation criterion module 20, after above-mentioned data are sent to evaluation module 30, compared by evaluation module 30 and judge, if vertical bendind rigidity is satisfied with vertical bendind rigidity evaluation index torsional rigidity evaluation index respectively with torsional rigidity, then by Stiffness evaluation, prove that the rigidity of underframe meets user demand.
The method that said apparatus adopts goes for the underframe of all cranes, and the calculating of said apparatus and judgement, by automatically carrying out, carry out manual operation and calculating without the need to operating personnel, can save artificial and improve test and appraisal efficiency.
In a specific embodiment provided by the present invention, computing module 10 specifically can comprise acquisition subelement 101 and computation subunit 102.
Wherein, obtain subelement 101 and to carry under state respectively after object leaves in face of ground and object leaves ground for hanging, obtain flange circle 1 perpendicular displacement of 2 on the vertical cross-section of crane arm place.
Computation subunit 102 is for calculating vertical bendind rigidity K g=Δ G/ Δ f z, calculate torsional rigidity K m=Δ M/ Δ θ.
Wherein, Δ G is lifting capacity variable quantity, and Δ M is hoisting moment variable quantity, Δ f zfor perpendicular displacement variable quantity, according to formula Δ f z=0.5 (A-C)+0.5 (B-D) calculates, and Δ θ is deflection angle, according to formula Δ θ=tan -1[(B-D)/L-(A-C)/L] * 180/ π calculate.
Particularly, A is that object leaves ground forward flange circle 1 height of first on the vertical cross-section of crane arm place, C is the height that object leaves at behind ground first, B is the height that object leaves ground forward flange circle 1 second point on the vertical cross-section of crane arm place, and D is the height that object leaves second point behind ground.
In a specific embodiment provided by the present invention, formulate evaluation criterion module 20 and specifically can comprise vertical bendind rigidity evaluation index determining unit 201 and torsional rigidity evaluation index determining unit 202.
Particularly, vertical bendind rigidity evaluation index determining unit 201 is for determining that vertical bendind rigidity evaluation index is wherein, K gfor vertical bendind rigidity, G maxfor the biggest lifting capacity, L 1for the longitudinal span of supporting leg, L 2for supporting leg horizontal span, K cfor vertical bendind rigidity constant, vertical bendind rigidity constant K cwith biggest lifting capacity G maxvariation tendency contrary.
Torsional rigidity evaluation index determining unit 202 is for determining that torsional rigidity evaluation index is K g>=M max/ K θ, wherein, K mfor torsional rigidity, M maxfor maximum hoisting moment, K θfor torsional rigidity constant, torsional rigidity constant K θwith maximum hoisting moment M maxvariation tendency identical.
In the above-described embodiments, the executive capability in modules can by realizing the self-operating of module in advance in the system of program writing module.Connection between each module and data transfer mode with reference to mode of the prior art, can repeat no more herein.
A kind of crane underframe rigidity assessment device provided by the present invention can be checked underframe rigidity automatically by computing module, formulation evaluation criterion module and evaluation module, ensures the rigidity qualification of underframe.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
Above crane underframe rigidity assessment method provided by the present invention and device are described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.

Claims (10)

1. a crane underframe rigidity assessment method, is characterized in that, comprising:
The perpendicular displacement variable quantity of described underframe upper flange circle and lifting capacity variable quantity before hanging object carrier based on underframe and after hanging object carrier, calculate the vertical bendind rigidity of described underframe, the deflection angle of described flange circle and hoisting moment variable quantity, calculate the torsional rigidity of described underframe before hanging object carrier based on described underframe and after hanging object carrier;
Vertical bendind rigidity evaluation index is determined with vertical bendind rigidity constant, based on maximum hoisting moment and the torsional rigidity constant determination torsional rigidity evaluation index of described crane based on the biggest lifting capacity of described crane, the longitudinal span of supporting leg, supporting leg horizontal span;
If described vertical bendind rigidity meets described vertical bendind rigidity evaluation index, then described vertical bendind rigidity is qualified; If described torsional rigidity meets described torsional rigidity evaluation index, then described torsional rigidity is qualified.
2. crane underframe rigidity assessment method according to claim 1, is characterized in that, hangs and carries under state, respectively after object leaves in face of ground and object leaves ground, obtains the perpendicular displacement of 2 on the vertical cross-section of crane arm place of described flange circle;
According to formula Δ f z=0.5 (A-C)+0.5 (B-D), calculates described perpendicular displacement variation delta f z, according to formula Δ θ=tan -1[(B-D)/L-(A-C)/L] * 180/ π, calculates described deflection angle Δ θ;
Wherein, A is that described object leaves the height of first on the vertical cross-section of crane arm place of described flange circle in face of ground, C is the height of after described object leaves ground described first, B is the height that described object leaves described flange circle second point on the vertical cross-section of crane arm place in face of ground, and D is the height of described second point after described object leaves ground.
3. crane underframe rigidity assessment method according to claim 1, it is characterized in that, the vertical bendind rigidity of the described underframe of described calculating, comprises according to formula K g=Δ G/ Δ f zcalculate, wherein, K gfor described vertical bendind rigidity, Δ G is described lifting capacity variable quantity, Δ f zfor described perpendicular displacement variable quantity;
The torsional rigidity of the described underframe of described calculating, comprises according to formula K m=Δ M/ Δ θ calculates, wherein, and K mfor described torsional rigidity, Δ M is described hoisting moment variable quantity, and Δ θ is described deflection angle.
4. crane underframe rigidity assessment method according to claim 1, it is characterized in that, the longitudinal span of the described biggest lifting capacity based on described crane, supporting leg, supporting leg horizontal span determine vertical bendind rigidity evaluation index with vertical bendind rigidity constant, comprising:
Determine that described vertical bendind rigidity evaluation index is
Wherein, K gfor described vertical bendind rigidity, G maxfor the described biggest lifting capacity, L 1for the longitudinal span of described supporting leg, L 2for described supporting leg horizontal span, K cfor described vertical bendind rigidity constant.
5. crane underframe rigidity assessment method according to claim 4, is characterized in that, described vertical bendind rigidity constant K caccording to described biggest lifting capacity G maxdetermine, and with described biggest lifting capacity G maxvariation tendency contrary;
Wherein, when the described biggest lifting capacity is 20 to 35T, the scope of described vertical bendind rigidity constant is 900 to 700; When the described biggest lifting capacity is 40 to 60T, the scope of described vertical bendind rigidity constant is 600 to 500; When the described biggest lifting capacity is 70 to 80T, the scope of described vertical bendind rigidity constant is 400 to 350.
6. crane underframe rigidity assessment method according to claim 1, is characterized in that, the described maximum hoisting moment based on described crane and torsional rigidity constant determination torsional rigidity evaluation index, comprising:
Determine that described torsional rigidity evaluation index is K m>=M max/ K θ;
Wherein, K mfor described torsional rigidity, M maxfor described maximum hoisting moment, K θfor described torsional rigidity constant.
7. crane underframe rigidity assessment method according to claim 6, is characterized in that, described torsional rigidity constant K θaccording to described maximum hoisting moment M maxdetermine, and with described maximum hoisting moment M maxvariation tendency identical;
Wherein, when described maximum hoisting moment is 20 to 35T, described torsional rigidity constant is 0.7; When described maximum hoisting moment is 40 to 60T, described torsional rigidity constant is 0.8; When described maximum hoisting moment is 70 to 80T, described torsional rigidity constant is 0.9.
8. a crane underframe rigidity assessment device, is characterized in that, comprising:
Computing module, for perpendicular displacement variable quantity and the lifting capacity variable quantity of described underframe upper flange circle before hanging object carrier based on underframe and after hanging object carrier, calculate the vertical bendind rigidity of described underframe, the deflection angle of described flange circle and hoisting moment variable quantity, calculate the torsional rigidity of described underframe before hanging object carrier based on underframe and after hanging object carrier;
Formulate evaluation criterion module, for determining vertical bendind rigidity evaluation index with vertical bendind rigidity constant, based on maximum hoisting moment and the torsional rigidity constant determination torsional rigidity evaluation index of described crane based on the biggest lifting capacity of described crane, the longitudinal span of supporting leg, supporting leg horizontal span;
Evaluation module, for judging according to described vertical bendind rigidity evaluation index and described torsional rigidity evaluation index, if described vertical bendind rigidity meets described vertical bendind rigidity evaluation index, then described vertical bendind rigidity is qualified; If described torsional rigidity meets described torsional rigidity evaluation index, then described torsional rigidity is qualified.
9. crane underframe rigidity assessment device according to claim 8, it is characterized in that, described computing module comprises:
Obtain subelement, under hanging the state of carrying, respectively after object leaves in face of ground and object leaves ground, obtain described flange the circle perpendicular displacement of 2 and deflection angle of described flange circle on the vertical cross-section of crane arm place;
Computation subunit, for calculating described vertical bendind rigidity K g=Δ G/ Δ f z, calculate described torsional rigidity K m=Δ M/ Δ θ; Wherein, Δ G is described lifting capacity variable quantity, and Δ M is described hoisting moment variable quantity, Δ f zfor described perpendicular displacement variable quantity, according to formula Δ f z=0.5 (A-C)+0.5 (B-D) calculates, and Δ θ is described deflection angle, according to formula Δ θ=tan -1[(B-D)/L-(A-C)/L] * 180/ π calculate;
Wherein, A is that described object leaves the height of first on the vertical cross-section of crane arm place of described flange circle in face of ground, C is the height of after described object leaves ground described first, B is the height that described object leaves described flange circle second point on the vertical cross-section of crane arm place in face of ground, and D is the height of described second point after described object leaves ground.
10. crane underframe rigidity assessment device according to claim 8, is characterized in that, formulates evaluation criterion module and comprises:
Vertical bendind rigidity evaluation index determining unit, for determining that described vertical bendind rigidity evaluation index is wherein, K gfor described vertical bendind rigidity, G maxfor the described biggest lifting capacity, L 1for the longitudinal span of described supporting leg, L 2for described supporting leg horizontal span, K cfor described vertical bendind rigidity constant, described vertical bendind rigidity constant K cwith described biggest lifting capacity G maxvariation tendency contrary;
Torsional rigidity evaluation index determining unit, for determining that described torsional rigidity evaluation index is K g>=M max/ K θ, wherein, K mfor described torsional rigidity, M maxfor described maximum hoisting moment, K θfor described torsional rigidity constant, described torsional rigidity constant K θwith described maximum hoisting moment M maxvariation tendency identical.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10185798A (en) * 1996-12-25 1998-07-14 Hitachi Ltd Stress-load environment-resistant-property evaluation method
JP2001004514A (en) * 1999-06-22 2001-01-12 Sumitomo Wiring Syst Ltd Strength evaluating method of bent part and evaluation data measuring jig
JP2002062231A (en) * 2000-08-22 2002-02-28 Bando Chem Ind Ltd Measuring device for belt flexural rigidity
CN103543018A (en) * 2012-07-13 2014-01-29 北汽福田汽车股份有限公司 Analysis method and device of frame load-bearing performance
CN103663199A (en) * 2013-12-13 2014-03-26 中联重科股份有限公司 Hoisting Machinery
CN103778321A (en) * 2014-01-02 2014-05-07 彭雪鹏 Method for analyzing wind action dynamic performance of super high-rise building swing-arm tower crane
CN104102850A (en) * 2014-07-31 2014-10-15 建新赵氏集团有限公司 Fatigue calculation method of car frame under effect of spatial rotation moment
CN104899444A (en) * 2015-06-04 2015-09-09 三峡大学 Determination method for structural parameter of moment limiter of bent board matched with tower crane

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10185798A (en) * 1996-12-25 1998-07-14 Hitachi Ltd Stress-load environment-resistant-property evaluation method
JP2001004514A (en) * 1999-06-22 2001-01-12 Sumitomo Wiring Syst Ltd Strength evaluating method of bent part and evaluation data measuring jig
JP2002062231A (en) * 2000-08-22 2002-02-28 Bando Chem Ind Ltd Measuring device for belt flexural rigidity
CN103543018A (en) * 2012-07-13 2014-01-29 北汽福田汽车股份有限公司 Analysis method and device of frame load-bearing performance
CN103663199A (en) * 2013-12-13 2014-03-26 中联重科股份有限公司 Hoisting Machinery
CN103778321A (en) * 2014-01-02 2014-05-07 彭雪鹏 Method for analyzing wind action dynamic performance of super high-rise building swing-arm tower crane
CN104102850A (en) * 2014-07-31 2014-10-15 建新赵氏集团有限公司 Fatigue calculation method of car frame under effect of spatial rotation moment
CN104899444A (en) * 2015-06-04 2015-09-09 三峡大学 Determination method for structural parameter of moment limiter of bent board matched with tower crane

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