SU1655756A1 - Hydraulic device for completing and running-in parts with tight joint - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to devices for assembly. The purpose of the invention is to expand technological capabilities and increase productivity. In the hydraulic device, the pressing cylinder is rigidly connected with its housing to the centering cylinder and provided with a lock. The hydraulic drive through the pressure reducing valve and the valve sequence allows the high-pressure pump to be connected to the low-pressure pump during idle strokes. Such a design allows to increase productivity and to work on parts with the same force in both directions. 1 il.

Description

The invention relates to mechanical engineering, in particular to devices for assembly.

The purpose of the invention is to expand technological capabilities and increase productivity by ensuring the assembly and disassembly of parts.

The principal scheme of the hydraulic device is shown in the drawing.

The hydraulic device contains coaxially mounted on the bed 1 and rigidly connected by their housings 2 and 3 centering 4 and pressing 5 hydraulic cylinders with pistons 6 and 7 and rods 8 and 9. On the bed 1 the clamp 8 of the hydraulic cylinder 11 is rigidly fixed with the rod 12, interacting with the latch 13 connected to the housing 3 of the pressing cylinder 5.

The hydraulic actuator includes a low pressure pump 14 with an overflow valve 15 and a high pressure pump 16 with an overflow

valve 17, the control cavity of which through a three-way valve 18 and drain valve 19 is connected to a drain line 20. The discharge line of the pump 16 is connected via a check valve 21 to the control cavity 22 of the drain valve 19, electrically controlled four-way valve 23 the throttle 24, the return 25 and the pressure reducing 26 valves with a pressure line of the pump 14 and the input of the second four-way valve 27 with electric control. The outputs of the distributor 23 are connected to the cavities of the cylinder 5, one of the outputs of the valves 27 is connected to the rod cavity of the cylinder 11 of the retainer, and the second output is connected to the rod cavity of the cylinder 4 and through parallel installed check valve 28 and sequence valve 29 to the piston cavity of the cylinder 11 and 30 cavity three-way

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the distributor 18. On the rod 9 and the frame 1 is assembled parts 31 and 32.

Hydraulic device works as follows.

The assembled part 31 is mounted on the rod 9 and fastened. For example, a sliding fork of the propeller shaft. A signal is given, the working fluid under pressure from the pump 14 flows through the distributor 27 into the rod cavity of the centering cylinder 4, and its body 2 together with the body 3 moves the fork 31 to the splined section of the cardan shaft 32. installed coaxially of the part 31 on the base 1. When the splines of the shaft 32 and the plug 31 are combined, the housing 2 stops, and the pressure on the pump line 14 starts to increase and reaches the setting value of the valve 29 of the sequence. The valve 29 opens and the working fluid enters the piston cavity of the cylinder 11; The housing 3 of the pressing cylinder is locked by locking the rod 12 of the latch 13. To increase the speed of operation, the pump 16, which is set to low pressure by the valve 19, automatically connects and supplies liquid through the pressure reducing valve 26 to the pump 14 main line. the setting value of the valve 15, which automatically gives the hydraulic command to the control cavity 30 of the distributor 18 to switch it, which cuts off the valve 19 from the overflow valve 17. The valve 23 is turned on, moving along the splines of the fork, sliding relative to the cardan shaft d by the required pressing force, is performed back and forth, ensuring their running-in. After several running-in cycles, the command is given to stop the rod 9 of the pressing cylinder 5 in the forward position, the part 31 expands and remains in the assembled state with the part 32, then the valve 27 switches, the housing 3 of the cylinder 5 depresses, pressure in the piston cavity of the cylinder 11 and in the control cavity 30 of the distributor 18 is reduced; each of these devices switches to the initial position, connecting the control cavity of the valve 17 to the valve 19. A command is given to return all cylinders to the initial position. Then the pressure of the pump 14 rises to the value of the valve 15 setting, and since this pressure is higher than the valve 19 setting, the pressure from the pump 14 through the check valve 25 and the throttle 24 enters the cavity 22 of the valve 19 and switches it by connecting the control cavity of the valve 17 with a drain line and the pump 16 unloads into a drain.

The economic effect of the implementation is achieved by expanding technological capabilities and increasing productivity.

Claims (1)

Claims of the Invention x perelivny klgpanami with control cavities, check valve, gave four electrically controlled running distributors, one of which is connected with outlets to the cavities of the pressing cylinder and the drain line, as well as a choke with a check valve, characterized in that in order to expand technological capabilities and increase productivity by ensuring the assembly and disassembly of parts, it is provided with a lock in the form a piston hydraulic cylinder with a rod and a latch, a three-way distributor and a drain valve with control cavities, a pressure reducing valve and a sequence valve, wherein The piston rod of the centering hydraulic cylinder is fixed on the frame, the housing of the pressing hydraulic cylinder is mounted on the frame with the possibility of axial movement and on it the latch is fixed, the hydraulic cylinder of the retainer is fixed on the frame with the possibility of its rod interacting with the latch, the control chamber of the high-pressure pump overflow valve is connected to the drain line via the three-way valve in series and the drain valve, the high-pressure pump line is connected to the four-way distributor of the pressing cylinder the control cavity of the drain valve and through a parallel-installed choke with a check valve and auxiliary valve with a second inlet four-way distributor with electric control and low-pressure pump pressure line, and the second four-way distributor with electric control is connected to a piston cavity with its first output / head hydraulic cylinder lock, the second output - with drain line and the third output - with the rod cavity centering hydraulic cylinder , 3 / and through the valve of the sequence, with the control cavity of the three-way distributor and with the piston cavity of the hydraulic cylinder of the lock.