SU603750A1 - Device for controlling reversible actuating mechanism - Google Patents

Description

(54) DEVICE FOR CONTROLLING THE REVERSING EXECUTIVE MECHANISM

The invention relates to the field of hydraulic equipment of mining machines, namely, devices for the hydraulic control of executive mechanisms and can be used in mechanical engineering, machine tool construction, aircraft manufacturing, in construction, agricultural and other areas of technology. A device for controlling a reversing actuator, made in the form of a hydraulic distributor, which consists of a valve section with an overflow spool equipped with maximum and minimum pressure valves, a lifting section with a distribution valve and a drain section l. The disadvantage of the device is the lack of automatic control of actuators. In addition, a device for controlling a reversing actuator is known, which includes a spool, a repeater cylinder with a pilot cock mounted inside the cover, and control handles connected by a splined connection with the spool 2. The disadvantage of the device is relatively low operational reliability. The purpose of the invention is to increase the operational reliability. This is achieved by the fact that the spool is made with longitudinal grooves, which are connected to each other by radial holes and a blind channel, made at the ends of the spool and hydraulically connected with the pilot tap, made in the form of a plunger with two inclined piscans on the lateral surface. FIG. 1 shows the structural diagram of the device; . 2 shows section A-A in FIG. 1; FIG. 3 shows a section BB in FIG. in fig. 4 shows a section B-B in FIG. 1. The device includes a reversing actuator 1, a follower cylinder -2 with a hollow piston 3 and a reverse feedback mechanism with mechanical feedback consisting of body 4, cock-pilot 5 controlled by handle 6, distributor 7 with lever 8 by a roller 9, which is included in the oblique groove of the piston of a special spool 10 and handle 11. The Zopotiyk lO has on the side surface six additional feed pads 12, four of which are connected in pairs by radial holes 13, and two fljtj-rux are connected to axial channels 14 made with to Zopotkik 1O is connected to the handle 11 with the help of an internal spline joint 15, To fix the cock-pilot 5 and the handle 6 in the desired position serve the jack-ass 16 with screw 17, the actuator 1 is connected to the device by two pipelines 18 and 19. In the case 4 of the reversing mechanism there are a pressure 20, a drain 21 ib connecting 22 channels. The device has fittings for connecting a pressure bearing. 23 and drain 24 pipelines. To replenish fluid leaks from the closed volume of the cavities of cylinders 1 and 2 or to divert excess liquid during thermal expansion, ball channels 25 and stops 26 are provided. The distributor sleeve 7 has a drain channel 27 and spool control channels 28 and 29, Crane pilot 5 on the side surface has two oblique plumes 30. The choke 31 is applied to adjust the speed of the actuator mechanism. The device operates as follows. The discharge fluid through the pipeline 23 flows to the distributor sleeve 7 simultaneously through two channels. body 4. One: i communicates the fluid with the annular groove of the distributor sleeve 7 through the throttle 31, the second channel directly through the groove and opening of the distributor sleeve into the pressure chamber of the cock-pilot 5. The pilot tap 5 controls a special zo-,. lottery 10, holding it in one of the extreme positions, for example in the top. Then the pressure fluid from the annular groove of the distributor sleeve 7 through the pressure channel 20 through the groove 12 and the radial hole 13 of the spool 1O to the channel 22 enters the upper cavity of the cylinder-2. The piston 3, moving downward, displaces the liquid from the Lower cavity of the repeater cylinder 2 through the pipeline 18 and moves the piston of the executive cylinder 1 to the right. From the right cavity of the executive cylinder 1, the fluid through conduit 19 through the radial transverse opening 13 of the spool 1O enters the drain through the drain channel 21 and the conduit 24. The piston 3, moving downward, rotates the lever 9 and the distributor sleeve 7 through the slant groove. as long as its o1-vers1P1 passes the crane-pidot jumper 5 and changes the direction of the ftofi fluid to TO {) HaN) gold 10, the zopotiyik communicates with the pilot-cockpit with no Olive drilling holes 2S 1 29 in the wall sleeves-distributor and her extreme ring s grooves. The spool 10 will move to the lowest position, .1 will change the access direction, and will be removed from channel 20. The pressure fluid spool 1O will now flow into the pipeline 19 and will move the piston of the actuator or1 {core 1 to the left. From the left cavity of the cylinder 1dra 1, the fluid through the pipeline 18 will be forced into the lower cavity of the cylinder 2 and move the piston 3 upwards. From the upper cavity of the repeater cylinder 2, the fluid through the channel 22, through the valve 10 and the drain channel 21 through the annular groove of the distributor sleeve 7 enters the drain pipe 24.. When the piston 3 moves upwards, the roller 9, the lever -8 and the distributor sleeve 7 now turn in the opposite direction and again until the direction of the fluid supplied to the ends of the spool 10 changes, the spool 10 is moved to its highest position and the process is repeated, The piston stroke control of the actuator 1 is controlled by axial movement of the cock-pilot 5, which has a wedge-shaped jumper in the working area. profile When the cock-pilot 5 is moved upwards, its expanding jumper closes the openings of the distributor sleeve in a larger area, and then the passage of these openings with flow reversal moments for controlling the spool 1O is increased. Consequently, the piston stroke 3 and the piston stroke of the actuator 1 are increased. By switching the pilot tap 5 using the handle 6 up or down, the piston stroke of the actuator, mechanism 1, can be smoothly increased or decreased. To displace the piston stroke to the actuator or the other side, you need to turn the cock-pilot 5 around its axis in the appropriate direction. After setting the necessary parameters for the automatic operation of the actuator 1, it is necessary to fix the crane pilot 5. In this case, the half-sleeves 16 are fastened with the help of screw 17 and securely hold the crane-pilot 5, in order to quickly switch from the automatic operation mode of the actuator to manual control turn the spool 10 with the handle 11 clockwise at an angle of 90. Then, turning the cock-pilot 5 clockwise or

counterclockwise, it is possible to dispense the liquid and control it firstly:; nstelnom vseh nzmom, like a normal faucet. When turning krapilot-5 counterclockwise Qrio scheme) pressure fluid from the piping propulsion unit 23 through the housing 4 through the groove and radial openings of the distributor sleeves 7 through channel 29 enters the lower cavity of the spool 10 and moves it to the upper end position.

The discharge fluid from the lower cavity of the spool 10 through its axial bore 14, the radial bore 13 and 12 12 through the channel 32 enters the upper cavity of the repeater cylinder 2. The piston 3, moving downward, displaces the liquid from the lower cavity of the repeater cylinder 2 through line 18 into the cavity of the executive cylinder 1, moving its piston to the right. On the opposite side of the piston of the additional cylinder 1, the liquid through the pipeline 19 through the groove 12, the radial bore 13 and the axial bore 14 of the other side of the spool 10 enters the drain, through the upper annular groove

distribution sleeve 7, through its axial channel 28 and the radial hole in the cavity of the cock-pilot 5, and then through the drain hole 27 of the sleeve-distributor 7 into the annular drain groove 24,

The piston 3 will move downward and with its groove turn the roller 9, the lever 8 and the distributor sleeve 7 until the openings of the sleeve distribute and are blocked by the pilot tap 5 and the access of the pressure fluid is stopped. The piston of the actuating cylinder 1 will stop at the position corresponding to the position of the edge of the pilot 5. When turning the crane 5 clockwise, the flow of the pressurized fluid will reverse and the spool 10 will move to the lower end position, and the piston of the executive cylinder 1 will go to the left. The stroke of the piston 3, and hence the piston of the executive cylinder 1, depends on the angle of rotation of the cock-pilot 5. Each position of the handle 6 corresponds to its own, well-defined position of the piston of the actuator 1, - When the spool 10 is manually operated, in the axial direction can be anything.

Claims (2)

1. USSR author's certificate number 175362, cl. Е 01 L 5 / О4, 19G3. 2. The author's certificate of the USSR. № 1235О2, cl. E 21 C 45 / OO, 1949. 6 -B 13 2 IS g Fig Put