CN203937142U - A kind of energy-conserving hydraulic control device of hydraulic injection molding machine - Google Patents

A kind of energy-conserving hydraulic control device of hydraulic injection molding machine Download PDF

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Publication number
CN203937142U
CN203937142U CN201420311722.4U CN201420311722U CN203937142U CN 203937142 U CN203937142 U CN 203937142U CN 201420311722 U CN201420311722 U CN 201420311722U CN 203937142 U CN203937142 U CN 203937142U
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China
Prior art keywords
valve
valve port
pressure
way valve
hydraulic
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Withdrawn - After Issue
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CN201420311722.4U
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Chinese (zh)
Inventor
张树有
高彦哲
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Zhejiang University ZJU
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Zhejiang University ZJU
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Priority to CN201420311722.4U priority Critical patent/CN203937142U/en
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Abstract

The utility model discloses a kind of energy-conserving hydraulic control device of hydraulic injection molding machine.Driver is connected with servomotor, servo motor driven oil pump running, and pressure fuel pump installation of sensors exports at oil pump, and oil pump import is connected with filter, and filter below is provided with fuel tank; The first valve port of two position two-way valve connects oil pump through check valve, and the second valve port is connected with accumulator, and the first valve port is connected with oil cylinder working-pressure sensor, and the first valve port is connected with the valve port P of three-position four-way valve, and valve port A, B are connected with oil cylinder, and valve port T below is provided with fuel tank.The utility model has ensured motor, the long-life of oil pump, steady operation; Accumulator pressure release not only fast but also have the effect of shock absorbing, has ensured the stable of hydraulic system; With respect to the pressure release mode of overflow valve or proportioning valve, the hydraulic energy that the utility model pressure release stage discharges is stored by accumulator, can be used for voltage stabilizing and flow is provided at injection stage, has improved energy-saving efficiency.

Description

A kind of energy-conserving hydraulic control device of hydraulic injection molding machine
Technical field
The utility model relates to a kind of hydraulic control device, relates in particular to the energy-conserving hydraulic control device of a kind of hydraulic injection molding machine of injection machine technical field.
Background technology
The technical process of injection machine is generally divided into several stages such as matched moulds, locked mode, injection, plasticizing, pressurize and die sinking, and needed pressure of each stage and flow are different.When injection machine by high pressure phase when compared with periods of low pressure transition, in oil cylinder, compressed hydraulic oil can produce resilience, this can cause, and oil pump damages, the life-span reduces even affects the stable of hydraulic system.
The pressure releasing method adopting at present mainly contains by motor reversal oil return with at oil circuit and installs two kinds of overflow valves additional.But driven by motor hydraulic pump reversion not only exists and reduces pump service life, causes that in oil circuit, producing bubble causes the technical problems such as pipeline vibration, and the Conversion of Energy that motor reversal consumes is that energy loss problem is very serious to the normal hydraulic energy that moves disadvantageous heat energy and backflow fuel tank of system.
Although the mode of access overflow valve has solved pressure release problem.But not only cause that because the intrinsic hydraulic energy losing issue of overflow valve causes this pressure release mode oil temperature raises, hydraulic oil viscosity declines, and energy-saving effect is poor.
Summary of the invention
In order to overcome the deficiency of above-mentioned existence, the utility model provides a kind of energy-conserving hydraulic control device of hydraulic injection molding machine, ensure pressure and flow transition reposefully between injection machine different phase in the mode of accumulator pressure release, and supplementary pressure and flow in the time of insufficient pressure, make injection machine more energy-conservation.
The following technical scheme of employing of the present utility model:
The utility model comprises driver, servomotor, oil pump, pressure fuel pump sensor, filter, check valve, two position two-way valve, accumulator, oil cylinder working-pressure sensor, three-position four-way valve and oil cylinder, driver is connected with servomotor, servo motor driven oil pump running, pressure fuel pump installation of sensors exports at oil pump, oil pump import is connected with filter, and filter below is provided with fuel tank; The first valve port of two position two-way valve is connected to oil pump outlet through check valve, the second valve port of two position two-way valve is connected with accumulator, the first valve port of two position two-way valve is connected with oil cylinder working-pressure sensor, the first valve port of two position two-way valve is connected with the valve port P of three-position four-way valve, valve port A, the valve port B of three-position four-way valve are connected with oil cylinder, and the valve port T below of three-position four-way valve is provided with fuel tank.
?the beneficial effects of the utility model are:
The utility model makes injection machine in the time of different operating phase transition, without motor, oil pump reversion pressure release stably, has ensured motor, the long-life of oil pump, steady operation; Accumulator pressure release not only fast but also have the effect of shock absorbing, has ensured the stable of hydraulic system; With respect to the pressure release mode of overflow valve or proportional pressure control valve, the hydraulic energy that the utility model pressure release stage discharges is stored by accumulator, can be used for voltage stabilizing and flow is provided at injection stage, has improved energy-saving efficiency.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure: 2, driver; 3, servomotor; 4, oil pump; 5, pressure fuel pump sensor; 6, filter; 7, check valve; 8, two position two-way valve; 9, accumulator; 10, oil cylinder working-pressure sensor; 11, three-position four-way valve; 12, oil cylinder.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
As shown in Figure 1, the utility model comprises driver 2, servomotor 3, oil pump 4, pressure fuel pump sensor 5, filter 6, check valve 7, two position two-way valve 8, accumulator 9, oil cylinder working-pressure sensor 10, three-position four-way valve 11 and oil cylinder 12, servo-driver control signal is connected with driver 2 by CAN communication modes, driver 2 is connected with servomotor 3 by line of codes, servomotor 3 drives oil pump 4 to turn round, pressure fuel pump sensor 5 is arranged on oil pump 4 and exports, oil pump 4 imports are connected with filter 6, and filter 6 belows are provided with fuel tank; First valve port (i.e. valve port A in figure) of two position two-way valve 8 is connected to oil pump 4 through check valve 7 and exports, second valve port (i.e. valve port B in figure) of two position two-way valve 8 is connected with accumulator 9, the first valve port of two position two-way valve 8 is connected with oil cylinder working-pressure sensor 10, the first valve port of two position two-way valve 8 is connected with the valve port P of three-position four-way valve 11, valve port A, the valve port B of three-position four-way valve 11 are connected with oil cylinder 12, and the valve port T below of three-position four-way valve 11 is provided with fuel tank.
Valve port A, the valve port B of three-position four-way valve 11 is connected with left chamber hydraulic fluid port and the right chamber hydraulic fluid port of oil cylinder 12 respectively.
Pressure fuel pump sensor 5 and oil cylinder working-pressure sensor 10 are exported respectively pressure fuel pump signal and oil cylinder working-pressure signal.
Two position two-way valve 8 and three-position four-way valve 11 switching of reception control signal and then control valve separately respectively.
In the time of oil circuit pressure release, two position two-way valve 8 is opened, and accumulator 9 absorbs high pressure liquid force feed, and check valve 7 makes hydraulic oil not return to oil pump 4, realizes pressure release, and after completing, two position two-way valve returns closure state; After oil circuit pressure release, in oil cylinder 12 injection process when insufficient pressure, injection machine occurs when not enough at injection phase pressure, flow, two position two-way valve 8 is opened, and accumulator 9 provides high pressure liquid force feed, and the high pressure liquid force feed in accumulator flows in working connection, make oil circuit pressure stability, do not shake.
The utility model is realized and being stored and release hydraulic energy by the break-make of two position two-way valve 8; Before two position two-way valve 8, have check valve 7, while ensureing that two position two-way valve 8 is opened, hydraulic oil enters accumulator 9, instead of is back in oil pump; Three-position four-way valve 11 is positioned at after oil cylinder working-pressure sensor 10, and oil cylinder 12 joins with three-position four-way valve, and oil cylinder 12 is according to the switching controls injection machine action of three-position four-way valve.
The rotating speed that driver 2 is adjusted servomotor 3 is adjusted the pressure in flow and the hydraulic system that oil pump 4 discharges.
The fuel tank of the valve port T below of three-position four-way valve 11 and the fuel tank of filter 6 belows can be same fuel tank.
Accumulator 9 can adopt bladder accumulator.
Concrete implementation process of the present utility model:
When completing an injection moulding flow process that pressure is higher, the pressure data feeding back according to oil cylinder working-pressure sensor 10, judges when working connection needs pressure release, gives two position two-way valve 8 start signal, high pressure liquid force feed is because stopping of check valve 7 cannot be returned to oil pump 4, thereby enters in accumulator 9.The data of feeding back when oil cylinder working-pressure sensor 10 show that working connection reaches after goal pressure, give two position two-way valve 8 closure signal, and now in working connection, pressure transition is to the required pressure of next injection moulding flow process, and high pressure liquid force feed is stored in accumulator.Need in the flow process of higher working connection pressure to high pressure phase transition, injection or other in periods of low pressure subsequently, when oil cylinder working-pressure sensor 10 feedback data show insufficient pressure, give two position two-way valve 8 start signal, the high pressure liquid force feed being before stored in accumulator 9 enters working connection, the data of feeding back when oil cylinder working-pressure sensor 10 show that working connection pressure reaches after set point pressure, and two position two-way valve 8 is closed under signal controlling.
The pressure data feeding back according to pressure fuel pump sensor 5, servomechanism control signal control driver 2, driver 2 is controlled servomotor 3, and servomotor 3 drives oil pump 4 with suitable speed running, ensures injection moulding process stability of flow, pressure balance.
The spool position of control signal control three-position four-way valve 11.Spool, when right, is realized the operation acts such as injection, pressurize of oil cylinder 12; Spool, when middle, is realized the operation acts such as oil cylinder 12 backhauls; Spool, when left, realized injection screw and is kept motionless.

Claims (1)

1. the energy-conserving hydraulic control device of a hydraulic injection molding machine, it is characterized in that: comprise driver (2), servomotor (3), oil pump (4), pressure fuel pump sensor (5), filter (6), check valve (7), two position two-way valve (8), accumulator (9), oil cylinder working-pressure sensor (10), three-position four-way valve (11) and oil cylinder (12), driver (2) is connected with servomotor (3), servomotor (3) drives oil pump (4) running, pressure fuel pump sensor (5) is arranged on oil pump (4) outlet, oil pump (4) import is connected with filter (6), filter (6) below is provided with fuel tank,
The first valve port of two position two-way valve (8) is connected to oil pump (4) outlet through check valve (7), the second valve port of two position two-way valve (8) is connected with accumulator (9), the first valve port of two position two-way valve (8) is connected with oil cylinder working-pressure sensor (10), the first valve port of two position two-way valve (8) is connected with the valve port P of three-position four-way valve (11), valve port A, the valve port B of three-position four-way valve (11) is connected with oil cylinder (12), and the valve port T below of three-position four-way valve (11) is provided with fuel tank.
CN201420311722.4U 2014-06-12 2014-06-12 A kind of energy-conserving hydraulic control device of hydraulic injection molding machine Withdrawn - After Issue CN203937142U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420311722.4U CN203937142U (en) 2014-06-12 2014-06-12 A kind of energy-conserving hydraulic control device of hydraulic injection molding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420311722.4U CN203937142U (en) 2014-06-12 2014-06-12 A kind of energy-conserving hydraulic control device of hydraulic injection molding machine

Publications (1)

Publication Number Publication Date
CN203937142U true CN203937142U (en) 2014-11-12

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104029366A (en) * 2014-06-12 2014-09-10 浙江大学 Energy-saving hydraulic control device of hydraulic injection molding machine
CN105599252A (en) * 2015-12-30 2016-05-25 太原理工大学 Electro-hydraulic hybrid energy coordinative recovery control device for injection molding machine
CN106321567A (en) * 2015-06-29 2017-01-11 苏州盛恒兴自动化设备有限公司 Method and implementation device for storing extra energy of hydraulic transmission system on line

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104029366A (en) * 2014-06-12 2014-09-10 浙江大学 Energy-saving hydraulic control device of hydraulic injection molding machine
CN106321567A (en) * 2015-06-29 2017-01-11 苏州盛恒兴自动化设备有限公司 Method and implementation device for storing extra energy of hydraulic transmission system on line
CN105599252A (en) * 2015-12-30 2016-05-25 太原理工大学 Electro-hydraulic hybrid energy coordinative recovery control device for injection molding machine
CN105599252B (en) * 2015-12-30 2017-08-22 太原理工大学 One kind injection mechanical electronic hydraulic mixed tensor coordinates recovery control device

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C14 Grant of patent or utility model
AV01 Patent right actively abandoned

Granted publication date: 20141112

Effective date of abandoning: 20170329

AV01 Patent right actively abandoned