Hydraulic control system pressure


B30B15/20 - controlling the speed of the ram, e.g. the speed of the approach, pressing or return strokes

 

(57) Abstract:

The invention relates to the field of engineering, namely, devices for the control of hydraulic presses. Hydraulic control system pressure contains the power supply, is connected with actuating cylinders through the valves with end cavities. The system includes a pump control, hydroelastic for the working fluid is made in the form of housing and the piston drive mounted therein to form two cavities. The control system is equipped with hydrographically device associated with the hydraulic actuator, controlled on-off valve, pump control, and a front cavity Executive cylinders. Communication is carried out via control lines. Gidroraspredeliteli the device consists of a flat slide valve with a movable and a stationary plate, communications of the plates and the programming disks mounted on a common flat spool axis. In the working cavity of hydroelastic posted by plunger cylinder and the float. The hollow plunger hydraulic cylinder is connected with the working cavity of hydroelastic through the check valve. The float is placed with possibly the STU plunger cylinder. The technical result of this invention is to provide a compact system, simplifying setup and automation of the collection of drainage leaks. 4 C.p. f-crystals, 3 ill.

The invention relates to the field of engineering, namely, devices for the control of hydraulic presses and other hydraulic equipment.

Known control device actuating cylinders machines and automatic lines (A. S. N 1132078, class B 30 B 15/20). The control device hydraulic cylinders machines and automatic lines, Y. A. Chernikov, publ. 1984, BI N 48) containing the actuating cylinders, a pump which is connected through valves with actuating hydraulic cylinders, drive programmetically associated with the cavities of the cylinders, and the lifters with the spring loaded piston mounted in the housing to form two cavities spring and working communicated with the suction line, the drive piston in the form of a screw, filter-breather and a locking device connected to hydroline collect drainage leaks, and check valve, installed between the spring and the working cavities of the hydraulic compensation.

The control device has considerable dimensions and requires a considerable investment of time in ZAR> Also known hydraulic control system pressure (Application N 95105037, 1996, S. A. Androsov, D. C. Ermakov, A. N. Transfiguration, Y. A. Chernikov) containing a power source associated with the end cavities of the valves actuating cylinders, the actuator, the stem of which is placed a programming device for switching valves control hydroelastic for the working fluid is made in the form of a housing with a piston mounted therein to form two cavities, the drive piston of hydroelastic, filter-breather and a locking device connected to hydroline leakage collection and Hydroecology, the actuator piston which is made in the form of a cylinder with a four-port two-position valve that is connected by pipeline with pump control and Hydroecology with rod and piston cavities, and at the end of the rod of the hydraulic cylinder of hydroelastic mounted valve, which gap is installed in the piston between the seat and the emphasis for draining the collected drainage leaks from the rod end in the piston.

The control system has considerable dimensions, requires a considerable investment of time on the adjustment due to the need to fine-tune Cams, collection of drainage leaks Isace collect drainage leaks.

The specified technical task is solved in that the hydraulic control system of the press, containing a power source which is connected with actuating cylinders through the valves with end cavities, pump control, hydroelastic for the working fluid is made in the form of housing and the piston drive mounted therein to form two cavities, there gidroraspredeliteli device associated with the hydraulic actuator, controlled on-off valve, pump control, and a front cavity Executive cylinders through the control lines, and consisting of a flat disc with the mobile and stationary plate, communications of the plates and the programming disks, mounted on the flat slide valve axis and in the working cavity of hydroelastic posted by plunger cylinder and the float, and the hollow plunger hydraulic cylinder is connected with the working cavity of hydroelastic through the check valve and the float is placed with overlapping them holes in the piston of hydroelastic connecting the cavity to collect drainage leaks hollow plunger hydraulic cylinder, the hydraulic cylinder of the actuator piston of hydroelastic of Siena through the pressure relief valve with pump control, and with the line of discharge of fluid through an adjustable throttle, the piston rod of the hydraulic cylinder actuator gidroraspredeliteli device fixed toothed rack associated with a toothed wheel mounted on the distributor shaft, which with the possibility of axial movement installed spring-loaded coupling half having at the end of the teeth with one-sided bevel and groove to accommodate the fork associated with the rod of the hydraulic cylinder disconnection of the coupling connected to the pump control via the four-way valve, and coupled with the coupling with the end teeth with unilateral bevel and connected with the movable plate flat slide valve gidroraspredeliteli device, on the distributor shaft has a Cam interoperable with four-way valve.

In Fig. 1 shows a schematic hydraulic circuit of the press of Fig. 2 and 3 - design gidroraspredeliteli device. The system includes a power source 1, which is connected through valves with end cavities 2 and 3 with the Executive cylinders 4 and 5, the pump control 6, connected through gidroraspredeliteli device 7 with end cavities 8, 9, 10 and 11 getorcreate Opredelitel 13, end cavity which communicates with the power source 1 through the pressure relief valve 14 and line drain 15 through an adjustable throttle 16. On the shaft 17 of the hydraulic cylinder actuator gidroraspredeliteli devices are installed and the toothed rack 18, which engages with the toothed wheel 19 mounted on the distributor shaft 20, which is fixed to the Cam 21 and the coupling 22 having at the end of the teeth 23 with one-sided bevel and the annular groove 24 that is designed to plug 25 that is installed on the rod 26 of the cylinder opening of the clutch 27 is connected through the four-way valve 28 with pump control 6. The coupling 22 has a possibility of axial movement and by means of a spring 29 is tightened to the coupling 30 also has at the end of the teeth 31 with one-sided bevel.

Gidroraspredeliteli device 7 includes a movable plate of a flat slide valve 32 mounted on the axis 33 can be rotated and connected with the coupling 30. Movable flat plate of the spool 32 has a different groove 34, connected by channels 35 with the output apertures 36 and groove 37. Using Belleville springs 38 and a movable plate of a flat slide valve 32 tightened to a fixed plate flat zolotnikkova groove 34 of the movable plate flat slide valve 32, and two annular grooves 41 and 42. The annular groove 41 has a radius equal to the radius of the location of the outlet openings 36 of the movable plate flat slide valve 32, and the annular groove 42 has a radius equal to the radius of the location of the end of the groove 37 of the movable plate flat slide valve 32, the most remote from the centre. The annular groove 41 is connected through the opening 43 with the line drain 15, and the annular groove 42 through the opening 44 with the pump control 6. On the axis 33 can be rotated set programming disks 45, having a through hole 46, similar to the diameter and location of the holes 40 of the fixed plate flat slide valve 39 and the groove 47, which is connected with one of the holes 46. On the axis 33 of the fixed communication plate 48 having apertures 49, similar to the diameter and location of the holes 40 of the fixed plate flat slide valve 39 and the annular groove 47 with a radius equal to the radius of the location of the most remote end of the groove 47 programming disk 45, which is connected with the hole 51, connected with the control lines 52, 53, 54, 55 and 56. The number of pairs programming disks 45 and the switching plate 48 is equal to the number of control lines 52, 53, 54, 55 and 56, fixing them on the axis 33 by using ha theme is equipped with Hydroecology 59, made in the form of housing 60 with the piston 61, installed it with the formation of the cavity 62 to collect leaks and working cavity 63. The piston is connected with the rod 64 of the hydraulic cylinder 65 of the drive piston 61 of hydroelastic connected to the power source 1. In the working cavity 63 hydroelastic mounted plunger hydraulic cylinder 66, the housing 67 which is fixed to the piston 61 of hydroelastic 59 and the plunger 68 fixed to the body 60 of hydroelastic 59. In the hollow plunger hydraulic cylinder 66 is placed a float 69, provided with a shut-off cone 70, having the ability to block the hole 71 in the piston 61 of hydroelastic 59 connecting the cavity to collect drainage leaks 62 hydroelastic 59 and the hollow plunger hydraulic cylinder 66. The working cavity 63 hydroelastic 59 through the check valve 72 is connected to the hollow plunger hydraulic cylinder 66.

The hydroline collection drain leakage (Fig. 1 not shown) connected to pipe leakage collection 73 associated with the cavity for collecting drainage leaks 62 through the filter 74.

To compensate for the loss of fluid in the system has a jellied mouth 75, connected to a pipe leakage collection 73 through the valve 76.

Line drain the fluid 15 is connected with the working cavity 63 hydroelastic 58 through the filter 77.

The control system operates as follows. The initial position of the cylinders, valves and gidroraspredeliteli device shown in Fig. 1.

When the pump control 6 and the power source 1 fluid through the opening 44 and the annular groove 42 of the fixed plate flat slide valve 39 gidroraspredeliteli device 7, and then through the slot 37 of the movable plate flat slide valve 32 is served in one of the holes 40 of the fixed plate flat slide valve 39. Through it, the liquid is supplied into the holes 46 programming disks 45 and the holes 49 of the switching plates 48. Then through the slot 47 programming disk 45, the annular groove 50, the hole 51 of the switching plate and the control line 54, the fluid enters the end of the cavity 9 of the valve 2 and switches. In the piston cavity Executive of the cylinder 4 from the power source 1 through the control valve 2 receives fluid and he makes the stroke. While the rest of the control line through the corresponding holes 51 and the annular grooves 50 of the switching plates 48, the slots 47 and openings 46 programming disks 46, the holes 49 of the switching plates, the holes 40 of the fixed plate flat sols 41 and outlet 43 is connected to the drain line of the liquid 15. At this time, the relief valve 14 is closed. When reaching the actuating cylinder 4 end position of the safety valve 14 is opened and fluid from the power source 1 through it is served in the end cavity of the two-position valve 13 and switches. Fluid from the pump control 6 enters the piston cylinder chamber of the drive gidroraspredeliteli device 12, the shaft 17 which is fixed to it a toothed rack 18 and extends through a gear wheel 19, the camshaft 20, the coupling 22 and the coupling 31 rotates the movable plate flat slide valve 32 gidroraspredeliteli device 7 and switches. Thus the fluid from the pump control 6 through gidroraspredeliteli device 7 and the control line 53 is served at the end of the cavity 8 of the valve 2, switching it. The liquid from the end of the cavity 9 of the valve 2 through the control line 54 and gidroraspredeliteli device 7 is displaced in the line of discharge of liquid 15. The hydraulic cylinder 4 performs idling, the valve 14 is closed, the fluid from the end cavity of the two-position valve 13 through an adjustable throttle 16 is displaced in the line when the rod cylinder chamber of the drive gidroraspredeliteli device 12, the shaft 17 with which a toothed rack 18 is returned to its original position by turning the toothed wheel 19, the camshaft 20 and the coupling 22 in the opposite direction. Thus, the teeth of the one-way bevel 25 and 31 of the coupling 22 and 31, slip relative to each other and movable plate flat slide valve 32 gidroraspredeliteli device 7 is not rotated.

Then through gidroraspredeliteli device, the liquid is successively fed through the control line 56 and 55 in the end of the cavity 10 and 11 of the valve 3. Executive hydraulic cylinder 5 is consistently doing work and idling.

To ensure the time delay liquid from the pump control 6 through gidroraspredeliteli device 7 is supplied via the control line 52 at the end cavity four-way valve 28 and switches. Triggered cylinder disconnection of the coupling 27 and through the plug 25, fixed to the rod 26, removes the coupling 22 from the coupling 30. This relief valve 14 is opened and through the dip dispenser 13 includes a hydraulic cylinder actuator gidroraspredeliteli device 12, which rotates the Cam shaft 20 with a fixed Kula cylinder 27 disconnection of the coupling is switched off, under the action of the spring 29, the coupling 22 is tightened to the coupling 30, the movable plate is a flat slide valve 32 gidroraspredeliteli device 7 is rotated until that moment, until the liquid from the pump control will not be available in the control line 54. Then the cycle repeats.

Return the drain leaks in the system as follows. The liquid from the collection of drainage leaks through pipe leakage collection 73 and the filter 74 is fed into the cavity of the collection of drainage leaks 62 hydroelastic 59 and through a hole 71 in the piston 61 of hydroelastic 59 is discharged into the hollow plunger hydraulic cylinder 66. The liquid level therein rises, the float 69 POPs up and closes the shut-off cone 70 hole 71. When lowering of the piston 61 of hydroelastic 59 of the liquid from the hollow plunger hydraulic cylinder 66 through the check valve 72 is displaced in the working cavity 63 hydroelastic 59. During the ascent of the piston 61 of hydroelastic 59 check valve 72 is closed and the shut-off cone 70 of the float 69 opens the hole 71 in the piston 61 of hydroelastic 59. Then the cycle repeats.

Set the new program is as follows. Weakened nut 57 gidroraspredeliteli device 7 and by turning programmiruyutsya. Adjust the exposure time is set by turning the Cam 21 on the distributor shaft 20.

No additional intervention in the process control system does not require.

1. Hydraulic control system pressure, containing a power source which is connected with actuating cylinders through the valves with end cavities, pump control, hydroelastic for the working fluid is made in the form of housing and the piston drive mounted therein to form two cavities, wherein the control system is equipped with hydrographically device associated with the hydraulic actuator, controlled on-off valve, pump control, and a front cavity Executive cylinders through the control lines and consisting of a flat disc with the mobile and stationary plate, communications of the plates and the programming disks, mounted on the flat slide valve axis and in the working cavity of hydroelastic posted by plunger cylinder and the float, and the hollow plunger hydraulic cylinder is connected with the working cavity of hydroelastic through the check valve and the float is placed SCEC a hollow plunger hydraulic cylinder.

2. The system under item 1, characterized in that the cylinder of the actuator piston of hydroelastic connected directly to the power supply.

3. The system under item 1, characterized in that the end cavity of the two-position valve is connected through a relief valve with pump control, and with the line of discharge of fluid through an adjustable choke.

4. The system under item 1, characterized in that the piston rod of the hydraulic cylinder actuator gidroraspredeliteli device fixed toothed rack associated with a toothed wheel mounted on the distributor shaft, which with the possibility of axial movement installed spring-loaded coupling half having at the end of the teeth with one-sided bevel and groove to accommodate the plug, connected with the rod of the hydraulic cylinder disconnection of the coupling connected to the pump control via the four-way valve, and coupled with the coupling with the end teeth with unilateral bevel and connected with the movable plate flat slide valve gidroraspredeliteli device.

5. The system under item 1, wherein the camshaft has a Cam interoperable with four-way valve.

 

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