SU939667A1 - Dump former of auger-rotor canal-cleaning machine - Google Patents

Description

The invention relates to earthmoving equipment, namely to the equipment of rotary screw excavators of continuous action, designed to dig reclamation canals.

Known spreaders of auger canal diggers are known, consisting of two inclined dump conveyor belts with a drive of traction drums fl.

However, the spreader does not allow dumping of soil on one side and has a complex drive design.

The closest to that proposed by the technical nature is an ETR-206A auger excavator. It consists of two belt conveyors mounted on a horizontal frame that can be moved transversely relative to the frame of the excavator. Each of the spreader conveyors includes an endless belt, end and intermediate drums, and a t2 drive.

The disadvantages of such spreaders with synchronous hydraulic drive of the end draft drums of conveyors are the uneven distribution of loads between the upper and lower drums of the conveyor, as well as between the left and right conveyors of the spreader; linear error and angular synchronization of traction drums due to unequal loads, volumetric efficiency of series-connected hydromotors and unequal diameter of the drums, which leads to accumulation of their mismatch exceeding the value of the elastic deformation of the conveyor belt, and slipping, which increases the wear of the tape and lining the drums; complication of the design of the spreader due to the constructive complexity of ensuring synchronization of the drums, as well as the conveyors themselves.

The purpose of the invention is to simplify the design.

The goal is achieved by the fact that in the spreader of the auger rotor channel, including a frame that is installed with the possibility of

two conveyors, each of which contains lower, intermediate and upper drums, covered by an endless belt with upper branches, installed with the possibility of transverse movement, driven by hydraulic motors and pressure and drain lines, the lower drums of each conveyor are kinematically connected , and the frame in the places of installation of the intermediate drum has a clamping mechanism, while the hydraulic motors are interconnected in parallel with the pressure and drain lines.

In this case, the kinematic connection between the lower drums is made in the form of gear wheels with disconnecting couplings, and the clamping mechanisms in the form of rollers.

In addition, the discharge line of each hydraulic motor has a shut-off valve.

FIG. 1 shows a spreader, front view; in fig. 2 - Kinematic scheme of the spreader.

Two breaking belt conveyors 1 are mounted on a horizontal frame 2 having the possibility of movement in the transverse direction relative to the frame of the excavator. Each conveyor includes an endless belt 3, an upper A, a lower 5 end drums and an intermediate drum 6.

The lower end drums 5 are interconnected by means of gears 7. At the points of bending of the upper winding belts 3, pressure devices with rollers 8 are installed. The upper end drums are equipped with driving hydraulic motors 9 and are pulling. The hydraulic motors 9 through pipelines 10 are connected in parallel to the discharge and drain lines of the hydraulic system. If it is necessary to increase traction capacity of the spreader, lower end drums

5 can also be made driven. In this case, an additional one or two hydraulic motors are mounted on the shafts of the gear wheels 7 and are connected in parallel to the discharge and drain lines of the hydraulic system. To shut off one of the conveyors, the lower end drums 5 are connected to gear wheels 7 and shut-off valves 12 are installed in the discharge lines of the hydraulic motors.

During the operation of the spreader in the mode of dumping soil on both sides of the channel, the horizontal frame 2 occupies a middle position and the receiving sections of both conveyors are under loading. In this case, both disconnect couplings 11 are turned on and the shut-off valves 12 are open. In this case, the working fluid from the discharge line of the hydraulic system through pipelines 10 is supplied under pressure to all hydraulic motors 9 connected in parallel

but. Rotation from the shafts of the hydraulic motors is transmitted to the traction drums 4. When the hydraulic motors are switched on in parallel, the traction drums become coupled to a hydraulic differential link, i.e. the rotational speeds of the drums are set according to the kinematics of the transfer with a flexible coupling, which in this case is a conveyor belt. Thus, with the same loadings of the left and right transporters, the loads on the hydraulic motors of both conveyors are equal, and in this case, the working fluid flow through the hydraulic motors and the rotation speeds of their shafts and, consequently, the rotation speeds of the traction drums are equal.

At unequal loads of the left and right transporters, there is a tendency to mismatch the loads on the hydraulic motors. In this case, the flow rate of the working fluid and the revolutions of the shaft of the more loaded hydraulic engine tend to decrease, and the less loaded shaft - to increase.

Claims (2)

Due to the fact that the conveyors are interconnected by a rigid kinematic connection in the form of gear wheels 7, and the slippage and slippage of the traction drums with the differential drive circuit in the presence of friction are practically eliminated, occurs with the help of disconnecting couplings 11, the moment created by the hydromstor t govoy drum less loaded conveyor. In this case, the gyro rotor of the more loaded conveyor is partially unloaded and the speeds of rotation of the traction drums are forcibly equalized. Consequently, from the first moment of operation of the spreader, the loads of the drive hydraulic motors automatically level. The load of the conveyor motor with a smaller load is increased by the equalizing torque, and the load of the conveyor motor with a larger load is reduced by the same amount. When the spreader operates in the ground dumping mode on one side of the channel, the horizontal frame 2 occupies one of the extreme positions and under the loading is the receiving section of one of the conveyors. At the same time, the disconnecting coupling 11 and the shut-off valve 12 of the inoperative conveyor turn off the working fluid from the discharge line hydraulic systems through pipelines tO are supplied under pressure to the hydraulic motor 9 of a single working conveyor. In this case, the performance of the spreader is ensured by a 2-fold increase in the speed of the conveyor belt, since the flow and speed of rotation of the motor shaft 9 increase respectively by 2 times. When the additional hydraulic motor is connected in parallel to the drive of the lower end drum 5, the upper and lower drums of one conveyor are provided linked by hydraulic differential coupling and automatic load balancing between upper and lower traction drum also occurs E conveyor due to the occurrence of surge torque generated by the hydraulic motor less loaded traction drum. The proposed device makes it possible to significantly simplify the kinematics and design of the auger screw canal rotor, reduce its weight and cost, and increase its reliability by reducing tape wear and drum lining. Claim 1. A rotary rotary canal-blade rotor, including a frame mounted for lateral movement, two conveyors, each of which contains lower, intermediate and upper drums, covered by an endless belt, driven by hydraulic motors and pressure and drain lines, distinguished by that, in order to simplify the construction, the bottom drums of each conveyor are kinematically connected to each other, and the frame in the places where the intermediate drum is installed has a pressing mechanism, while romotory interconnected parallel discharge pipe and the drain pipe in E. 2. Spreader according to claim 1, characterized in that the kinematic connection between the lower drums is made in the form of gears with separating couplings, and the clamping mechanisms in the form of rollers. 30 Tillage unit according to claim 1, characterized in that the pressure line of each hydraulic motor has a shut-off valve. Sources of information taken into account in the examination of 1, USSR Author's Certificate number, class, E 02 F 5/05, 1952, 2. Excavator canal digger ETR-206A. Remarkable note. Br NSK, Publishing House PCB Meliormash, 1978, p. 19-27 (prototype).