CN102901425A - Lifting height measurement method for bridge crane - Google Patents

Abstract

The invention relates to bridge cranes, in particular to an energy consumption test and evaluation method for bridge cranes. A lifting height measurement method for a bridge crane includes: step one, using a steel ruler at a to-be-measured position of the crane to measure the horizontal distance L between a steel wire rope on a winding drum and the edge of a central groove of the winding drum, wherein the steel wire rope of the crane is wound on the winding drum with a rope groove; step two, using the steel rule to measure the horizontal distance L2 between the steel wire rope on the winding drum and the edge of the central groove of the winding drum after lifting is completed; step three, calculating displacement of the steel wire rope on the winding drum according to a formula satisfying that delta L=L1-L2; and step four, calculating the lifting height y of the crane according to a formula satisfying that y=pi DXdelta L/a, wherein D refers to the peripheral diameter of the winding drum, and a refers to pulley multiplying power. Using the method can conveniently, quickly and accurately judge the lifting height of the crane to guarantee acquisition of the lifting weight which is a critical parameter for energy consumption test and evaluation of the crane.

Description

Overhead travelling crane lifting altitude measuring method

Technical field

The present invention relates to overhead travelling crane, relate in particular to overhead travelling crane energy consumption testing assessment method.

Background technology

The crane energy consumption testing requires the lifting altitude of test lifting mechanism, does not but provide concrete grammar.Current, it is the electronic counter labelling method that the overhead travelling crane lifting altitude is measured the common test method, the position that high-speed rotation axle (or shaft coupling) wish of photometer head aligning guide is measured.Look the needs of measuring accuracy at this position, by the linear mark of doing in circumference n etc. minute to parallel to the axis, counter be connected in series with the electrical wiring of major loop, and counter is when electric motor starting, and the beginning Auto-counting when motor stops, being counted end.Counting by recording calculates lifting altitude.

Because the non-visual test method of electronic counter labelling method, exist with certain error during by the linear mark doing in circumference n etc. minute to parallel to the axis, and counter needs to be connected in series with the electrical wiring of major loop, the structure of crane arranges timing, great majority are that control loop is arranged in electric panel room, counter tandem link is longer, and test site is not easy to realize.Adopt the electronic counter labelling method, because the restriction of field condition, there are certain difficulty in label creating and electric wiring wiring, be difficult to carry out, in view of this, attainable a kind of overhead travelling crane lifting altitude method for fast measuring at the scene is of great significance for the enforcement tool of crane energy consumption testing.

Summary of the invention

The present invention is intended to address the aforementioned drawbacks, and a kind of overhead travelling crane lifting altitude measuring method is provided.The present invention can judge easily and fast, exactly and using lifting height of crane, guarantees the obtaining of energy consumption testing evaluation important parameter lifting altitude of crane.

For addressing the above problem, a kind of overhead travelling crane lifting altitude measuring method, the wire rope roll of described crane is on the reel with grooving, and it comprises the following steps:

Step 1, the position measurement to be measured at crane measures reel steel wire ropes to the horizontal range L1 of the reel trough rim in bosom with Steel Ruler;

Step 2 hoists complete rear with the horizontal range L2 of Steel Ruler measurement reel steel wire ropes to the reel trough rim in bosom;

Step 3 is calculated the displacement L=L1-L2 of wire rope on reel;

Step 4 according to following formula, is calculated the lifting altitude y of crane;

y=πD*ΔL/a

Wherein:

D: all diameters of reel;

A: pulley multiplying power.

Usually the wire rope of crane proper alignment in order on reel, twine the reel of layer of steel wire rope, reel is provided with grooving, reel ends has the flange that prevents the wire rope landing, the monolateral height of flange should exceed the wirerope diameter on 2 times on wire rope surface, when suspension hook is in the working position minimum point, and the wire rope that twines on the reel, except the number of turns of fixing tail of rope, should be no less than 2 circles.When suspension hook is in the working position peak, also should leave the wiring surplus of at least 1 whole circle on the reel.The present invention is take the lifting mechanism of crane as measuring object, by the measurement lifting altitude that the relative displacement of reel and wire rope is surveyed, can judge easily and fast, exactly and use lifting height of crane, guarantee that the energy consumption testing of crane is evaluated obtaining of important parameter lifting altitude.

Embodiment

Below, the present invention is further illustrated:

A kind of overhead travelling crane lifting altitude measuring method, the method comprises:

Step 1, the position measurement to be measured at crane measures reel steel wire ropes to the horizontal range L1 of the reel trough rim in bosom with Steel Ruler;

Step 2 hoists complete rear with the horizontal range L2 of Steel Ruler measurement reel steel wire ropes to the reel trough rim in bosom;

Step 3 is calculated the displacement L=L1-L2 of wire rope on reel;

Step 4 is measured drum grooves apart from P, calculates the collapsing length of wire rope;

Step 5 is consulted the crane technical information, checks reel and pulley body, confirms reel week diameter D, pulley multiplying power a; According to the step 4 result, calculate the lifting altitude of crane;

Order, lifting height of crane y and wire rope displacement are x

Y=f (x) is then arranged

Have as can be known from geometric configuration: y=x/a formula 1

And, x=π D* Δ L formula 2

Therefore, y=f (x)=π D* Δ L/a formula 3

With distance L 1, the L2 value of measurement point a, b and reel baseline, the Δ L value of solution, Δ L value substitution formula 3 can draw the lifting altitude y of the crane of calculating.

Finished the lifting height of crane measurement by this method, it is consistent that the result that the scrambler test shows is installed in test result and electrical control additional, according to this as the judgment basis of lifting altitude, for the crane energy consumption testing provides technical support.

Claims (1)

1. overhead travelling crane lifting altitude measuring method, the wire rope roll of described crane is characterized in that on the reel with grooving, and it comprises the following steps:

Step 1, the position measurement to be measured at crane measures reel steel wire ropes to the horizontal range L1 of the reel trough rim in bosom with Steel Ruler;

Step 2 hoists complete rear with the horizontal range L2 of Steel Ruler measurement reel steel wire ropes to the reel trough rim in bosom;

Step 3 is calculated the displacement L=L1-L2 of wire rope on reel;

Step 4 according to following formula, is calculated the lifting altitude y of crane;

y=πD*ΔL/a

Wherein:

D: all diameters of reel;

A: pulley multiplying power.