CN103807239A - Dual output shaft motor based shear plate synchronous control hydraulic system - Google Patents

Abstract

A shearing plate synchronous control hydraulic system based on dual output shaft motors, relates to a shearing machine synchronous control hydraulic system, including two shearing cylinders, two retaining cylinders, three pressing cylinders and shearing cylinder synchronization Control system; shear cylinder synchronous control system includes oil tank, two identical hydraulic pumps, double output shaft motors that drive the two hydraulic pumps to rotate, two first one-way valves; the oil outlet of each first one-way valve The first oil circuit, the second oil circuit and the third oil circuit are respectively connected. The first oil circuit includes a pilot relief valve and a two-position two-way solenoid valve; the second oil circuit includes a sequence valve and a two-position four-way solenoid valve. ; The third oil circuit includes a pressure reducing valve, a second one-way valve and a first accumulator; the double output shaft motor drives two identical hydraulic pumps to supply oil to two identical shearing cylinders respectively, which can better ensure The synchronization accuracy of the two shearing cylinders; the two shearing cylinders are respectively connected with the first accumulator to realize pressure maintenance.

Description

A shear plate synchronous control hydraulic system based on dual output shaft motors

technical field

The invention relates to a hydraulic system for synchronous control of a shearing machine, in particular to a hydraulic system for synchronous control of a shearing machine based on motors with double output shafts, and is especially suitable for the hydraulic system of double-cylinder high-precision synchronous control of a large shearing machine.

Background technique

At present, the shearing machine is very popular at home and abroad, and the size of the shearing plate is getting larger and larger, and most of them adopt hydraulic transmission. Most of the large-scale shearing machines use a double-cylinder system to shear the sheet, so the synchronous control accuracy of the double-cylinder system is particularly important, which is an important measure of product performance. Most of the products on the market now have low synchronization accuracy of the double-cylinder system, and the quality of the sheared sheet is poor. the

Patents 200620158152.5 and 201120154346.9 disclose a hydraulic system of gate-type shearing machine, both of which adopt serial hydraulic cylinders to ensure the synchronization of shearing plates, but due to the lack of oil replenishment devices, the synchronization accuracy is not high, and cannot well meet the needs of large shearing machines. Machine synchronization control requirements. On the premise of meeting the basic requirements of the system, the synchronous control precision of the double-cylinder system should be improved as much as possible to improve the quality of the sheared sheet.

Contents of the invention

The purpose of the present invention is to provide a synchronous control hydraulic system for shearing machines based on dual output shaft motors in view of the current situation that the synchronization accuracy of the double-cylinder system of large-scale shearing machines is not high. The synchronous accuracy of the cylinder system, and the shearing of the sheet is more stable and the shearing quality is better.

The technical solution to achieve the above purpose is: a shearing plate synchronous control hydraulic system based on double output shaft motors, including two identical shearing cylinders, two identical blocking cylinders, three identical pressing cylinders and shearing cylinders. Cylinder cutting synchronous control system; the shearing cylinder synchronous control system includes a fuel tank, two identical hydraulic pumps and dual output shaft motors that drive the two hydraulic pumps to rotate, the oil inlets of the two hydraulic pumps are connected to the fuel tank, and the two hydraulic pumps The oil outlets of the pumps are respectively connected with first one-way valves, the oil inlets of each first one-way valve are respectively connected with the oil outlets of the corresponding hydraulic pumps, and the oil outlets of each first one-way valve are respectively connected with The first pressure gauge; the oil outlet of each first one-way valve is respectively connected with the first oil circuit, the second oil circuit and the third oil circuit, and the first oil circuit includes a pilot relief valve and a two-position two-way solenoid The oil inlet port of the pilot relief valve is connected to the oil outlet port of the first one-way valve, the oil outlet port of the pilot relief valve is connected to the oil tank, and the oil control port of the pilot relief valve is connected to the two-position two-way solenoid valve. The oil inlet, the oil outlet of the two-position two-way solenoid valve is connected to the oil tank; the second oil circuit includes the sequence valve and the two-position four-way solenoid valve, the oil inlet of the sequence valve is connected to the oil outlet of the first one-way valve, and the sequence The oil outlet of the valve is connected to the pressure oil port P of the two-position four-way solenoid valve, the oil return port T of the two-position four-way solenoid valve is connected to the oil tank, and the working oil port of the two-position four-way solenoid valve is respectively connected to a shear cylinder. The shearing cylinder is a single-rod piston cylinder, the working oil port A of the two-position four-way solenoid valve is connected to the rodless chamber of the shearing cylinder, and the working oil port B of the two-position four-way solenoid valve is connected to the rod chamber of the shearing cylinder ; The third oil circuit includes a pressure reducing valve, a second one-way valve and a first accumulator, the oil inlet of the pressure reducing valve is connected with the oil outlet of the first one-way valve, and the oil outlet of the pressure reducing valve is connected with the first The oil inlet of the two one-way valves, the first accumulator is connected to the oil outlet of the second one-way valve, and the external control port of the sequence valve in the second oil circuit is connected between the first accumulator and the oil outlet of the second one-way valve. Between the second one-way valves, the oil outlets of the second one-way valves in the two third oil circuits are connected in parallel and respectively connected with three press cylinders and two stop cylinders, and the press cylinders are single-acting The plunger type hydraulic cylinder, the material retaining cylinder is a double piston rod hydraulic cylinder, the diameter of the piston rod of the cavity on one side of the material retaining cylinder is larger than the diameter of the piston rod of the cavity on the other side, and the two third oil circuits The oil outlet of the second one-way valve in the valve is connected in parallel with the cavity on the side of the small-diameter piston rod of the retaining cylinder; between the three pressure cylinders and the first accumulator in the third oil circuit The second pressure gauge and the first relief valve are connected, the oil inlet of the first relief valve is respectively connected with the first accumulator and the second pressure gauge, the oil outlet of the first relief valve is connected with the oil tank, the two A third accumulator, a third pressure gauge and a second overflow valve are connected in parallel between the cavities on the side of the large-diameter piston rod of the block material cylinder, and the oil inlets of the second overflow valve are respectively connected to The third pressure gauge, the third accumulator and the cavity on one side of the large-diameter piston rod of the two retaining cylinders.

Optimally, a speed regulating valve is respectively connected between the oil return ports T of the two two-position four-way solenoid valves and the fuel tank, and the oil inlet ports of the speed regulating valves are connected to the oil return ports T of the two-position four-way solenoid valves. The oil outlet of the speed valve is connected to the oil tank, which makes the shearing of the sheet more stable and the shearing quality better.

The beneficial effects of the present invention are:

(1) The double output shaft motor drives two identical hydraulic pumps to supply oil to two identical shearing cylinders, which can better ensure the synchronization accuracy of the two shearing cylinders.

(2) The two shearing cylinders of the present invention are respectively connected with first accumulators to realize pressure maintenance, which reduces the energy consumption of the system.

Description of drawings

Fig. 1 is the working principle diagram of the present invention.

Detailed ways

As shown in FIG. 1 , the present invention includes two identical shearing cylinders 1 , two identical retaining cylinders 2 , three identical pressing cylinders 3 and a synchronous control system 4 for shearing cylinders.

The shear cylinder synchronous control system 4 includes a fuel tank 5, two identical hydraulic pumps 6, and a double output shaft motor 7 that drives the two hydraulic pumps 6 to rotate. The oil inlets of the two hydraulic pumps 6 are connected to the fuel tank 5, and the two hydraulic pumps The oil outlets of 6 are respectively connected with the first one-way valve 8, and the oil inlet of each first one-way valve 8 is respectively connected with the oil outlet of corresponding hydraulic pump 6, and the oil outlet of each first one-way valve 8 Ports are respectively connected with the first pressure gauge 9.

The oil outlet of each first one-way valve 8 is respectively connected with the first oil circuit 10, the second oil circuit 11 and the third oil circuit 12, and the first oil circuit 11 includes a pilot relief valve 13 and a two-position two-way The solenoid valve 14, the oil inlet port of the pilot relief valve 13 is connected to the oil outlet port of the first one-way valve 8, the oil outlet port of the pilot relief valve 13 is connected to the oil tank 5, and the oil control port of the pilot relief valve 13 is connected to The oil inlet port of the two-position two-way solenoid valve 14, the oil outlet port of the two-position two-way solenoid valve 14 is connected to the oil tank 5; The oil port is connected to the oil outlet of the first one-way valve 8, the oil outlet of the sequence valve 15 is connected to the pressure oil port P of the two-position four-way solenoid valve 16, and the oil return port of the two-position four-way solenoid valve 16 passes through the speed control valve 17 is connected to the oil tank 5, and the working oil ports of the two-position four-way solenoid valve 16 are respectively connected to a shearing cylinder 1, which is a single-rod piston cylinder, and the working oil port A of the two-position four-way solenoid valve 16 is connected to the shearing cylinder 1. The rodless chamber of the cylinder 1, the working oil port B of the two-position four-way solenoid valve 16 is connected to the rod chamber of the shear cylinder 1; the third oil circuit 12 includes a pressure reducing valve 18, a second one-way valve 19 and a first accumulator The energy device 20, the oil inlet of the pressure reducing valve 18 is connected with the oil outlet of the first one-way valve 8, the oil outlet of the pressure reducing valve 18 is connected with the oil inlet of the second one-way valve 19, and the first accumulator 20 is connected to the oil outlet of the second one-way valve 19, the external control port of the sequence valve 15 in the second oil circuit 11 is connected between the first accumulator 20 and the second one-way valve 19, two third The oil outlets of the second one-way valve 19 in the oil circuit 12 are connected in parallel with three pressing cylinders 3 and two retaining cylinders 2 respectively, and the pressing cylinders 3 are single-acting plunger hydraulic cylinders. The material retaining cylinder 2 is a double-piston rod hydraulic cylinder, the diameter of the piston rod on one side of the material retaining cylinder 2 is greater than the diameter of the piston rod on the other side of the cavity, and the second of the two third oil passages 12 The oil outlet of the one-way valve 19 is connected in parallel with the cavity on one side of the small-diameter piston rod of the retaining cylinder 2 .

A second pressure gauge 21 and a first overflow valve 22 are connected between the three pressing cylinders 3 and the first accumulator 20 in the third oil circuit 12, and the oil inlets of the first overflow valve 22 are respectively connected to the first accumulator 20. An accumulator 20 and a second pressure gauge 21, the oil outlet of the first overflow valve 22 is connected to the oil tank 5, and the cavities on the side of the large-diameter piston rod of the two retaining cylinders 2 are connected in parallel to a third pressure gauge. The accumulator 23, the third pressure gauge 24 and the second relief valve 25, the oil inlet of the second relief valve 25 are respectively connected to the third pressure gauge 24, the third accumulator 23 and the two stop cylinders 2 Cavity on the side of the large diameter piston rod.

The operating principle of the shearing machine synchronous control hydraulic system based on the double output shaft motor of the present invention is as follows:

1. The double output shaft motor 7 starts, the electromagnet 1YD of the two-position two-way solenoid valve 14 and the electromagnet 2YD of the two-position four-way solenoid valve 16 are not powered, the system is in an unloaded state, and the two shear cylinders 1 are stationary .

2. The electromagnet 1YD of the two-position two-way solenoid valve 14 is energized, and the oil passes through the pressure reducing valve 18 and enters three pressing cylinders 2 and two retaining cylinders 3, the sheet is compressed, and the retaining cylinder 2 leaves Sheet.

3. When the system pressure rises, the sequence valve 15 opens, the oil passes through the two-position four-way solenoid valve 16, and enters the rodless cavity of the two shearing cylinders 1, and the sheet is slowly sheared.

4. The electromagnet 2YD of the two-position four-way solenoid valve 16 is energized, the left position of the two-position four-way solenoid valve 16 works, the oil enters the rod cavity of the two shearing cylinders 1, and the knife rest returns.

5. The third accumulator 23 supplies oil to the two retaining cylinders 2, and the two retaining cylinders 2 return.

Claims (2)

1. the shear plate synchronous control hydraulic system based on Dual-output shaft motor, is characterized in that: comprise two identical shear cylinders, two identical backgauge cylinders, three identical binder cylinders and shear cylinder synchronous control system, described shear cylinder synchronous control system comprises fuel tank, two identical oil hydraulic pumps and the Dual-output shaft motor that drives two oil hydraulic pumps to rotate, the filler opening of two oil hydraulic pumps connects fuel tank, the oil outlet of two oil hydraulic pumps is connected with respectively the first one-way valve, the filler opening of each the first one-way valve connects with the oil outlet of corresponding oil hydraulic pump respectively, and the oil outlet of each the first one-way valve is connected with respectively the first pressure gauge, the oil outlet of each the first one-way valve is connected with respectively the first oil circuit, the second oil circuit and the 3rd oil circuit, the first oil circuit comprises pilot operated compound relief valve and two-position two-way solenoid valve, the filler opening of pilot operated compound relief valve connects the oil outlet of the first one-way valve, the oil outlet of pilot operated compound relief valve connects fuel tank, the control hydraulic fluid port of pilot operated compound relief valve connects the filler opening of two-position two-way solenoid valve, and the oil outlet of two-position two-way solenoid valve connects fuel tank, the second oil circuit comprises sequence valve and two-position four-way solenoid valve, the filler opening of sequence valve connects the oil outlet of the first one-way valve, the oil outlet of sequence valve connects the pressure hydraulic fluid port P of two-position four-way solenoid valve, the oil return inlet T of two-position four-way solenoid valve connects fuel tank, the actuator port of two-position four-way solenoid valve connects respectively a shear cylinder, described shear cylinder is single-rod piston cylinder, the actuator port A of two-position four-way solenoid valve connects the rodless cavity of shear cylinder, and the actuator port B of two-position four-way solenoid valve connects the rod chamber of shear cylinder, the 3rd oil circuit comprises reduction valve, the second one-way valve and the first accumulator, the filler opening of reduction valve is connected with the oil outlet of the first one-way valve, the oil outlet of reduction valve connects the filler opening of the second one-way valve, described the first accumulator is connected to the oil outlet of the second one-way valve, the outside control mouth of the sequence valve in described the second oil circuit is connected between the first accumulator and the second one-way valve, article two, after the oil outlet parallel connection of the second one-way valve in the 3rd oil circuit, be connected with three binder cylinders and two backgauge cylinders respectively, described binder cylinder is single-acting plunger type hydraulic cylinder, described backgauge cylinder be hydraulic cylinder with double piston rods, the diameter of the piston rod of backgauge cylinder one side cavity is greater than the diameter of opposite side cavity piston rod, article described two, after the oil outlet parallel connection of the second one-way valve in the 3rd oil circuit, be connected with described backgauge cylinder small bore piston bar one side cavity, between the first accumulator in described three binder cylinders and the 3rd oil circuit, be connected with the second pressure gauge and the first relief valve, the filler opening of the first relief valve connects respectively the first accumulator and the second pressure gauge, the oil outlet of the first relief valve connects fuel tank, between the cavity of enlarged bore piston bar one side of described two backgauge cylinders, after parallel connection, be connected with the 3rd accumulator, the 3rd pressure gauge and the second relief valve, the filler opening of described the second relief valve connects respectively the cavity of enlarged bore piston bar one side of the 3rd pressure gauge, the 3rd accumulator and two backgauge cylinders.

2. a kind of shear plate synchronous control hydraulic system based on Dual-output shaft motor according to claim 1, it is characterized in that: between the oil return inlet T of described two two-position four-way solenoid valves and fuel tank, be connected with respectively series flow control valve, the filler opening of series flow control valve connects the oil return inlet T of two-position four-way solenoid valve, and the oil outlet of series flow control valve connects fuel tank.

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