CN201553555U - Correcting signal collecting device of free wheel of 400ton crane bogie - Google Patents

Abstract

The utility model relates to a correcting signal collecting device of a free wheel of a 400ton crane bogie, comprising two bogie end beams and a bogie track; the lower surfaces of the two end beams of the bogie are fixedly connected with a pair of fixed supporting plates respectively; the fixed supporting plates are connected with a hauling wheel component by a pinshaft; the hauling wheel component is provided with an absolute-value coder, wherein the hauling wheel component comprises a bearing supporting frame, a free wheel, a wheel shaft, a variable diameter shaft flange, a bearing seat and a roller bearing; one end of the bearing supporting frame is connected with the lower part of the fixed supporting plate by a pinshaft and the other end thereof is provided with the wheel shaft by the roller bearing and the bearing seat; the free wheel is sheathed on the wheel shaft and is contacted with the rail of the bogie; one end of the wheel shaft is provided with a shaft coupling; and the absolute-value coder is connected with the shaft coupling. The horizontal moving amount of the crane is changed into the rotating amount by the free wheel, the rotating amount is recorded and converted into the digital signal and is transmitted to a PLC central station by the absolute-value coder; and the moving difference of the two end beams of the bogie are compared and corrected so that the moving distances of the end beams at two sides of the crane are consistent.

Description

400 ton overhead travelling crane cart free gear device for acquiring deflection correcting signal

Technical field the utility model relates to twin beam overhead bridge crane, particularly a kind of 400 ton overhead travelling crane cart free gear device for acquiring deflection correcting signal.

The background technology twin beam overhead bridge crane is commonly called as overhead traveling crane, is used for the lifting operations such as loading and unloading of installation, decomposition or the material of main equipment.Be widely used in industries such as machinery, electric power, metallurgy, casting.The overhead traveling crane majority is installed on indoor, also can be installed on outdoor.The cart of twin beam overhead bridge crane is also referred to as traveling gear or translation mechanism.

Twin beam overhead bridge crane is in moving process, because the distance that cart both sides end carriage moves is inequality, and originating firm can't utilize Design of Mechanical Structure and Electrical Control Technology at that time, gather the signal of cart both sides end carriage movement difference, eliminate the difference of cart both sides end carriage miles of relative movement, satisfy the maintenance demand of generator set.

The electric elements of installing on the overhead traveling crane is domestic sixties of a product, belongs to obsolete product, and producer does not produce, and spare part is purchased nowhere, can only rely on the sectional repair defective component to keep the use of overhead traveling crane.The electric protection function is poor, sensitivity is low, the protection project is few.The cart of every overhead traveling crane has four walking carriage groups, lay respectively at the front, rear, left and right of overhead traveling crane, the structure of each walking carriage group is identical, all is four wheels, have one to be running wheel (also claiming driving wheel) in these four wheels, other three all is follower.Be subjected at that time the restriction of hoisting crane Electrical Control Technology level both at home and abroad, the electrical speed regulation system is very backward, and four running wheels of cart are respectively by four electrical motor independent drive, i.e. the corresponding driving wheel that drives in the four-wheel chassis group of electrical motor.And each walking carriage group at bridging crane main beam two ends, because the unbalance load that produces when the traveling gear of compositions such as electrical motor, retarder, bearing and transmission device exists intrinsic speed difference and dolly to move, installation, horizontal adjustment and the axis adjustment etc. of adding each each parts of chassis group at girder two ends produce the reason of uneven constant force square, make two end carriages of cart move different distance and cause the crane frame deflection on the different track of left and right side.

Original design does not have ability to eliminate the skewness that in fact exists, and can only rely on the flange of hoisting crane road wheel both sides, hoisting crane is imposed restrictions on the steel track, to finish normal parallel motion.Just produced the overbalance stressed twisting situation of road wheel phenomenon of " gnawing rail " and crane beam like this, thus.

Bridge crane end carriage movement difference correcting theory is not consider in original machine design of overhead traveling crane and Electrical Control Technology.The original dynamo-electric design concept of overhead traveling crane is thought: because of using identical physical construction, identical electrical motor, identical change-speed box and identical wheel in cart end carriage both sides, so the distance of end carriage two side shiftings should be identical when cart is worked.

But usually occur in actual use, because of end carriage both sides inequality generation of the miles of relative movement defective of " gnawing rail ".Trace it to its cause is exactly because the adjusting speed accuracy of original rotor resistance speed control technology is low, the speed setting curve is not the straight line that links up, and motor slip ratio is different and the trueness error and the accumulation of error of machine manufacture, when causing overhead traveling crane work, the driving motor one side motor speed height of both sides end carriage, a side motor speed are low, the distance that makes distance, the opposite side of cart both sides end carriage one side shifting move is short, let alone the movement difference signal that cart both sides end carriage in fact occurs is gathered, transmitted and controls.

In view of the restriction of domestic rubber tyre gantry crane design, manufacture level at that time, the restriction of particularly Electrical Control Technology design, manufacture level, overhead traveling crane a lot of technological deficiencies and fault occur in more than 40 years use.The velocity control accuracy of overhead traveling crane is low, and mechanical specialities is soft, seamlessly transits poor performance during low speed, and starting current is big, and stop position is inaccurate.The operation easier that unit decomposes, cart slightly moves when installing is big, and translation does not realize at all a little.The inherent technology defective and the potential safety hazard of above-mentioned existence have seriously influenced normally the carrying out of maintenance, erection work of generator set and electromechanical appliance, and to the threat of the security presence impact wreckage of hanging device.In order to eliminate potential safety hazard and the technological deficiency that overhead traveling crane exists, hoisting crane electric system upgrading is carried out in factory department's decision-making.

Full-fledged according to domestic and international hoisting crane electrical speed regulation technology, and the improving constantly of main electric elements reliability such as frequency converter, Programmable Logic Controller, light current master controller, practicality.We utilize full frequency changing AC speed changing, Programmable Logic Controller is the transformation of PLC control technology, improve the technical performance of 400T hoisting crane, upgrades the equipment of heavy-duty machine.

At the stressed twisting situation of overbalance of crane large vehicle walking wheel " gnawing rail " phenomenon and crane frame, utility model people has taked electric satisfactory after correcting in the electrical control design; Difference at four drive motor speed, the difference of two end carriage miles of relative movement of cart, the utility model-400 ton overhead travelling crane cart free gear device for acquiring deflection correcting signal has been adopted in design, be used for eliminating the skidding in two end carriage moving process of cart, accurately gather and the electric signal of transmitting two different miles of relative movement of end carriage, to realize the correction of cart both sides end carriage movement difference.Country-level science and technology is looked into the world, the domestic science and technology that Gansu Province research institute of scientific-technical information of new consulting unit finishes and is looked into new confirmation through Gansu Province: all do not have relevant report both at home and abroad.

Utility model content the technical problems to be solved in the utility model is to provide a kind of 400 ton overhead travelling crane cart free gear device for acquiring deflection correcting signal.Use the skidding in two end carriage moving process of this device elimination cart, realize the correction of cart both sides end carriage movement difference, make the miles of relative movement unanimity of cart both sides end carriage, stop position is accurate.

It is as follows that the utility model solves the problems of the technologies described above the technical scheme of being taked: a kind of 400 ton overhead travelling crane cart free gear device for acquiring deflection correcting signal comprise two cart end carriages, big Car Track; It is characterized in that: be fixedly connected with one pair of fixed support plate respectively below two end carriages of cart, fixed support plate is connected with the tugboat assembly through bearing pin, and the tugboat assembly is equipped with absolute value encoder.

The tugboat assembly comprises bearing supporting frame, free gear, wheel shaft, multidiameter shaft flange, bearing seat and antifriction-bearing box; Bearing supporting frame one end is connected the fixed support plate bottom through bearing pin, and the other end is installed wheel shaft by antifriction-bearing box and bearing seat, and free gear is sleeved on the wheel shaft, and free gear contacts with big Car Track; Wheel shaft one end is equipped with coupler, and absolute value encoder is connected with coupler.

The unpowered driving of tugboat assembly, because of unpowered tugboat assembly is connected in fixed support plate through pivot pin, fixed support plate is fixed on below two end carriages of cart, other parts that guarantee free gear and tugboat assembly thereof can swing up and down freely along with the fluctuating of big Car Track, free gear is remained with tight contact of big Car Track do not produce skidding.

In order to keep free gear tightly to contact with big Car Track all the time, prevent to produce skidding, weight box is equipped with in the free gear top.

Free gear changes the parallel motion amount of the left and right end carriage of overhead traveling crane into rotation amount, then by with the coaxial absolute value encoder of free gear with the rotation amount record, to be converted to the PLC that electric signal sends in the girder be Programmable Logic Controller.When the end carriage of cart moves, free gear changes the parallel motion amount of overhead traveling crane into rotation amount, by absolute value encoder rotation amount is write down, is converted to accurate electric pulse digital quantity signal again, digital data transmission is arrived the PLC master station of cart by the PROFIBUS-DP communication modes, to the adjustment that compares and rectify a deviation of the movement difference of two end carriages of cart, make the miles of relative movement unanimity of cart both sides end carriage.

Description of drawings Fig. 1 is a structural representation of the present utility model,

Fig. 2 is the left view of Fig. 1.

Among the figure: 1-fixed support plate, 2-bearing supporting frame, 3-coupler shell, 4-bearing seat, 5-absolute value encoder, 6-coupler, 7-wheel shaft, 8-multidiameter shaft flange, 9-free gear, 10-bearing pin.The 11-weight box, 12-cart end carriage, the 13-antifriction-bearing box, 14-weight box support, the big Car Track of 15-,

The specific embodiment such as Fig. 1 and shown in Figure 2: a kind of 400 ton overhead travelling crane cart free gear device for acquiring deflection correcting signal comprise two cart end carriages 12, big Car Track 15; It is characterized in that: be fixedly connected with one pair of fixed support plate 1 respectively below two end carriages 12 of cart, fixed support plate 1 is connected with the tugboat assembly through bearing pin 10, and the tugboat assembly is equipped with absolute value encoder 5.

The tugboat assembly comprises bearing supporting frame 2, free gear 9, wheel shaft 7, multidiameter shaft flange 8, bearing seat 4 and antifriction-bearing box 13; Bearing supporting frame 2 one ends are connected fixed support plate 1 bottom through bearing pin 10, and the other end is installed wheel shaft 7 by antifriction-bearing box 13 and bearing seat 4, and free gear 9 is sleeved on the wheel shaft 7, and free gear 9 contacts with big Car Track 15; Wheel shaft 7 one ends are equipped with coupler 6, and absolute value encoder 5 is connected with coupler 6; Coupler 6 is positioned at coupler shell 3, and absolute value encoder 5 is positioned at the absolute value encoder shell.

The absolute value encoder shell is fixedly installed in coupler shell 3, and coupler shell 3 is fixedly installed in bearing seat 4, and bearing seat 4 is fixedly installed in bearing supporting frame 2.

As of the present utility model perfect, directly over free gear 9, disposed a weight box 11 that can carry 300Kg ballast iron and steel.Its carrying counterweight iron block applies a downward gravity to free gear 9 together, to increase the friction force between free gear 9 and the big Car Track 15, prevents that more effectively free gear 9 from skidding.Specific practice is a fixed installation weight box support 14 on the coupler shell 3, and assembling loaded van support 14 is connected fixed support plate 1 bottom through bearing pin 10, and weight box 11 is set above the weight box support 14.

Absolute value encoder 5 is P+F absolute value encoders, it is the core component of free gear deviation correcting device, it changes the parallel motion amount of two cart end carriages into rotation amount, and with rotation amount record, be converted to digital electric signal, with the PLC master station of digital data transmission, send to the PLC in the girder by the PROFIBUS-DP communication modes to cart.Position signal amount with the cart operating handle in PLC compares, and the i.e. velocity contrast between " given speed amount " of the position signal that calculates the actual speed of cart end carriage both sides motor and cart operating handle, to the adjustment of rectifying a deviation of the movement difference of two end carriages of cart.The side cart frequency converter that the instruction rotating speed is high is adjusted output frequency, and the motor that orders about the big side beam of translational movement reduces operating speed, thereby the actual speed of two groups of movable motors of realization cart left and right side is consistent.

Claims (5)

1. a ton overhead travelling crane cart free gear device for acquiring deflection correcting signal comprises two cart end carriages, big Car Track; It is characterized in that: be fixedly connected with one pair of fixed support plate (1) below two end carriages of described cart (12) respectively, described fixed support plate (1) is connected with the tugboat assembly through bearing pin (10), and described tugboat assembly is equipped with absolute value encoder (5).

2. a kind of 400 ton overhead travelling crane cart free gear device for acquiring deflection correcting signal as claimed in claim 1, it is characterized in that: described tugboat assembly comprises bearing supporting frame (2), free gear (9), wheel shaft (7), multidiameter shaft flange (8), bearing seat (4) and antifriction-bearing box (13); Described bearing supporting frame (2) one ends are connected described fixed support plate (1) bottom through described bearing pin (10), the other end is installed described wheel shaft (7) by described antifriction-bearing box (13) and described bearing seat (4), described free gear (9) is sleeved on the described wheel shaft (7), and described free gear (9) contacts with described big Car Track (15); Described wheel shaft (7) one ends are equipped with coupler (6), and described absolute value encoder (5) is connected with described coupler (6); Described coupler (6) is positioned at coupler shell (3), and described absolute value encoder (5) is positioned at the absolute value encoder shell.

3. a kind of 400 ton overhead travelling crane cart free gear device for acquiring deflection correcting signal as claimed in claim 2, it is characterized in that: described absolute value encoder shell is fixedly installed in described coupler shell (3), described coupler shell (3) is fixedly installed in described bearing seat (4), and described bearing seat (4) is fixedly installed in described bearing supporting frame (2).

4. as claim 2 or 3 described a kind of 400 ton overhead travelling crane cart free gear device for acquiring deflection correcting signal, it is characterized in that: dispose weight box (11) directly over the described free gear (9).

5. a kind of 400 ton overhead travelling crane cart free gear device for acquiring deflection correcting signal as claimed in claim 4, it is characterized in that: described coupler shell (3) is gone up fixed installation weight box support (14), described weight box support (14) is connected described fixed support plate (1) bottom through described bearing pin (10), and described weight box (11) is set above the described weight box support (14).

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