CN101564893A - Hydraulic drive unit for high-speed continuous hollow blow molding machine - Google Patents

Hydraulic drive unit for high-speed continuous hollow blow molding machine Download PDF

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Publication number
CN101564893A
CN101564893A CNA2009100270669A CN200910027066A CN101564893A CN 101564893 A CN101564893 A CN 101564893A CN A2009100270669 A CNA2009100270669 A CN A2009100270669A CN 200910027066 A CN200910027066 A CN 200910027066A CN 101564893 A CN101564893 A CN 101564893A
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oil
valve
main
hydraulic
links
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CNA2009100270669A
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Chinese (zh)
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CN101564893B (en
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钱国平
周阳中
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江苏佳成机械有限公司
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Publication of CN101564893A publication Critical patent/CN101564893A/en
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Abstract

The invention discloses a hydraulic drive unit for a high-speed continuous hollow blow molding machine, which is capable of reducing the energy consumption and the impact force under the condition of mold movement and improving the mold moving speed and the production efficiency. The hydraulic drive unit comprises a main oil pump, an auxiliary oil pump and a drive motor thereof, wherein an oil outlet of the main oil pump is connected with a main non-return valve through a changeover valve; oil inlets of the main non-return valve and a proportional pressure-reducing valve are connected with a main hydraulic fluid accumulator; an oil outlet of the proportional pressure-reducing valve is an oil supply port of a main hydraulic oil channel; the oil supply port of the main hydraulic oil channel is connected with a mold moving oil cylinder through a closed-loop electrohydraulic proportional changeover valve; an oil outlet of the auxiliary oil pump is an oil supply port of an auxiliary hydraulic oil channel; and the oil supply port of the auxiliary hydraulic oil channel is also connected with an auxiliary hydraulic fluid accumulator through oil inlets of an auxiliary non-return valve and a servo valve. The hydraulic drive unit is particular suitable to be used in the multi-station high-speed continuous hollow blow molding machine.

Description

Fluid pressure drive device in the high-speed continuous blow molding machine

Technical field

The present invention relates to the fluid pressure drive device in the blow molding machine, refer more particularly to the fluid pressure drive device in the high-speed continuous blow molding machine.

Background technology

High-speed continuous blow molding machine, its action generally includes: the advance and retreat of the folding of mould, shifting formwork, blowning installation, lift die head, remove overlap etc.Be characterized in: short, the action many (the particularly high-speed continuous blow molding machines of double) of the time of each cycle period; And the required flow of each action is widely different, and the required flow of the opening and closing movement of shifting formwork and mould is very big, and lifts the advance and retreat of die head, blowning installation and remove the required flow of action such as overlap very little.In each cycle period, account for actuation time to such an extent that ratio is very high, for the high-speed continuous blow molding machine of double, its actuation time even reach about 80% of the whole cycle.

As shown in Figure 1, the fluid pressure drive device that is used for high-speed continuous blow molding machine at present, its structure comprises: a pair vane pump 1, the big flow oil-out of pair vane pump 1 links to each other with unloading overflow valve 3 with a check valve 2, the low discharge oil-out of this check valve 2 and pair vane pump 1, proportional pressure control valve 4 and main hydraulic circuit link to each other, and main hydraulic circuit demultiplexing is respectively by various valves (two position and four-way reversing valves 5, one-way throttle valve 6, three position four-way directional control valve 7, choke valve 8, hydraulic control one-way valve 9) and the combination of valve and new line oil cylinder 20, right blow needle oil cylinder 21, left side blow needle oil cylinder 22, mould oil cylinder 23 moves to right, mould oil cylinder 24 moves to left, right die cylinder 25, left side die cylinder 26 fuel feeding such as oil cylinder such as grade.Thisly there are following shortcomings by the supporting centralized oil supply mode of pair vane pump (constant displacement pump) and proportional pressure control valve:

1, energy resource consumption is big: must select the discharge capacity and the corresponding motor of oil pump according to the peak value of flow, thus a large amount of spill losses when causing the low discharge demand.

2, Dong Zuo execution speed is slow, impacts greatly: because solenoid directional control valve and throttle valve control are adopted in the shifting formwork action, adopt mechanical position limitation so can't realize hydraulic pressure accurately to locate, the impact of start and stop is all very big, in order to reduce to impact the speed that can only slow down operation.

3, can only adopt sequentially-operating, to avoid the pressure interference of different actions.So just cause temporal waste, reduced production efficiency.In fact, there are some actions to carry out simultaneously.

Summary of the invention

Technical problem to be solved by this invention is: the impulsive force when a kind of capable of reducing energy consumption and shifting formwork is provided, improve the fluid pressure drive device in the high-speed continuous blow molding machine of shifting formwork speed and production efficiency.

For solving the problems of the technologies described above, the technical solution used in the present invention is: the fluid pressure drive device in the high-speed continuous blow molding machine, comprise: major and minor oil pump and drive motors thereof, the oil-out of main oil pump links to each other with main check valve by reversal valve, main check valve links to each other with main hydraulic fluid accumulator with the oil-in of proportional pressure-reducing valve, the oil-out of proportional pressure-reducing valve is the oil-feed port of main hydraulic circuit, and the oil-feed port of main hydraulic circuit links to each other with mould shifting oil cylinder by the closed loop electro-hydraulic proportion reversing valve; The oil-out of auxiliary oil pump is the oil-feed port of secondary hydraulic circuit, and the oil-feed port of secondary hydraulic circuit also links to each other with secondary hydraulic fluid accumulator with the oil-in of servo valve by secondary check valve.

The oil return opening of described major and minor hydraulic circuit links to each other with the oil return oil filter by oil cooler, and the oil return oil filter links to each other with fuel tank.

Described major and minor hydraulic fluid accumulator links to each other with fuel tank by stop valve respectively.

Also be provided with high-pressure filter between described secondary check valve and the servo valve.

The invention has the beneficial effects as follows: the present invention has adopted major and minor hydraulic circuit, and the oil cylinder that can work simultaneously, shortens the running time in each cycle, thereby improved production efficiency by allowing some actions carry out simultaneously respectively by major and minor hydraulic circuit fuel feeding; In addition, by major and minor hydraulic fluid accumulator is set, respectively corresponding hydraulic fluid accumulator is carried out topping up with the action tempus intercalare term of execution of utilizing the low discharge action, and when actions such as shifting formwork and folding mould need big flow, provide hydraulic oil jointly by oil pump and corresponding hydraulic fluid accumulator, like this, only need select oil pump with the suitable discharge capacity of average discharge, and needn't examine the filter peak flow, thereby the energy consumption of greatly reducing; In addition,, correct the deviation in the implementation in real time, make very big executive item high-speed smooth operation of inertia and accurate location owing to adopted the closed loop electro-hydraulic proportion reversing valve that it is carried out closed-loop control to mould shifting oil cylinder.Main hydraulic circuit only need be equipped with the pressure that an electro-hydraulic proportional reducing valve changes main hydraulic circuit in real time, thereby avoided joining a pressure-reducing valve or proportional reversing valve for each road action, simplified system, lower the manufacturing cost of system, and provide convenience for the sequencing of equipment control.

Description of drawings

Fig. 1 is the structural representation of the described fluid pressure drive device of background technology.

Among the figure: 1, pair vane pump, 2, check valve, 3, unloading overflow valve, 4, proportional pressure control valve, 5, two position and four-way reversing valves, 6, one-way throttle valve, 7, three position four-way directional control valve, 8, choke valve, 9, hydraulic control one-way valve, 20, new line oil cylinder, 21, right blow needle oil cylinder, 22, left blow needle oil cylinder, 23, the mould oil cylinder that moves to right, 24, the mould oil cylinder that moves to left, 25, right die cylinder, 26, left die cylinder.

Fig. 2 is the structural representation of fluid pressure drive device of the present invention.

Among the figure: 1, main motor, 2, main oil pump, 3, two position and four-way reversing valves, 4, main check valve, 5, main hydraulic fluid accumulator, 6, electro-hydraulic proportional reducing valve, 7, the closed loop electro-hydraulic proportion reversing valve, 8, secondary hydraulic fluid accumulator, 9, servo valve, 10, high-pressure filter, 11, secondary check valve, 12, two position and four-way reversing valves, 13, three position four-way directional control valve, 14, three position four-way directional control valve, 15, oil cooler, 16, the oil return oil filter, 17, auxiliary-motor, 18, auxiliary oil pump, 19, main fuel filter, 20, secondary oil filter, 21, main stop valve, 22, secondary stop valve, 23, one-way throttle valve, 24, one-way throttle valve, 25, mould shifting oil cylinder, 26, mould shifting oil cylinder, 27, the new line mould oil cylinder, 28, servo-cylinder, 29, the closed loop electro-hydraulic proportion reversing valve.

Fig. 3 is by the position of the executive item of mould shifting oil cylinder driving and the corresponding relation schematic diagram of valve input signal.

Fig. 4 is the control principle structural representation of mould shifting oil cylinder.

The specific embodiment

Below in conjunction with accompanying drawing, describe specific embodiments of the present invention in detail.

As shown in Figure 2, fluid pressure drive device in the high-speed continuous blow molding machine of the present invention, comprise: main, auxiliary oil pump 2 and 18 and drive the main motor 1 of main oil pump 2 and drive the auxiliary-motor 17 of auxiliary oil pump 18, the oil-out of main oil pump 2 links to each other with main check valve 4 by two position and four-way reversing valves 3, main check valve 4 links to each other with main hydraulic fluid accumulator 5 with the oil-in of electro-hydraulic proportional reducing valve 6, main hydraulic fluid accumulator 5 is made of the hydraulic fluid accumulator of two parallel connections, the oil-out of this electro-hydraulic proportional reducing valve 6 is the oil-feed port of main hydraulic circuit, the oil-feed port of main hydraulic circuit by closed loop electro-hydraulic proportion reversing valve 7 with 29 respectively with two stations on mould shifting oil cylinder 25 link to each other with 26, the oil-feed port of main hydraulic circuit also can be as required links to each other with other oil cylinder such as folding mould oil cylinder; The oil-out of auxiliary oil pump 18 is the oil-feed port of secondary hydraulic circuit, the oil-feed port of secondary hydraulic circuit links to each other with the oil-in of high-pressure filter 10 by secondary check valve 11, the oil-out of high-pressure filter 10 links to each other with the oil-in and the secondary hydraulic fluid accumulator 8 of servo valve 9, the oil-feed port of secondary hydraulic circuit also links to each other with Mode-locking oil cylinder with 14 by three position four-way directional control valve 13, link to each other with new line mould oil cylinder 27 with 24 by two position and four-way reversing valves 12, one-way throttle valve 23, the oil-feed port of secondary hydraulic circuit also can link to each other with other oil cylinder as required; The oil return opening of major and minor hydraulic circuit links to each other with oil return oil filter 16 by oil cooler 15, and oil return oil filter 16 links to each other with fuel tank; In the present embodiment, major and minor hydraulic fluid accumulator 5 links to each other with fuel tank with 22 by major and minor stop valve 21 respectively with 8; Described major and minor oil pump 2 and 18 is the Variable plunger pump of constant pressure type.

Operation principle of the present invention is: the fuel system that adopts constant-pressure axial variable piston pump+hydraulic fluid accumulator, avoided the restriction of peak flow, only need to select the oil pump of discharge capacity less (suitable) and the motor of corresponding power just can meet the demands with average discharge, respectively corresponding hydraulic fluid accumulator is carried out topping up with the action tempus intercalare term of execution of utilizing the low discharge action, and when actions such as shifting formwork and folding mould need big flow, provide hydraulic oil jointly by oil pump and corresponding hydraulic fluid accumulator, thereby solve the problem of moment oil pump capacity deficiency.The discharge capacity of oil pump is suitable with the average discharge of one-period, that is:

And use electro-hydraulic proportion reversing valve to shifting formwork action carrying out closed-loop control, here, the shifting formwork action of two stations provides power by closed loop electro-hydraulic proportion reversing valve 7 and 29 respectively, be that example is described its control procedure with closed loop electro-hydraulic proportion reversing valve 7 below: as shown in Figure 3, the input signal of closed loop electro-hydraulic proportion reversing valve 7 is that the physical location according to executive item changes, a among the figure, b, c, d, the particular location of these points of e all can be set according to actual needs flexibly, the input signal of I and II also can be set, realize closed-loop control according to control principle as shown in Figure 4, correct the deviation in the implementation in real time.This control mode can make the very big executive item of inertia, and high-speed smooth is moved, also accurately located.And use electro-hydraulic proportion reversing valve to shifting formwork action carrying out closed-loop control, the realization high-speed mobile does not have impact, and accurately locatees.In addition, main hydraulic circuit has just realized that by an electro-hydraulic proportional reducing valve 6 valve controls the pressure of a plurality of actions, and compares with the mode of manual voltage regulation, debug more convenient, and the technological parameter that controller can the storing multiple sets goods.In addition, the hydraulic oil of auxiliary oil pump 18 outputs is supplied with wall thickness separately and is controlled, lifts actions such as die head, locked mode supercharging, removal overlap, and these actions can be carried out simultaneously with folding mould, the shifting formwork action of main oil pump 2 fuel feeding, have so just shortened the cycle of operation greatly, have improved production efficiency.

Claims (4)

1. the fluid pressure drive device in the high-speed continuous blow molding machine, comprise: major and minor oil pump and drive motors thereof, it is characterized in that: the oil-out of described main oil pump links to each other with main check valve by reversal valve, main check valve links to each other with main hydraulic fluid accumulator with the oil-in of proportional pressure-reducing valve, the oil-out of proportional pressure-reducing valve is the oil-feed port of main hydraulic circuit, and the oil-feed port of main hydraulic circuit links to each other with mould shifting oil cylinder by the closed loop electro-hydraulic proportion reversing valve; The oil-out of auxiliary oil pump is the oil-feed port of secondary hydraulic circuit, and the oil-feed port of secondary hydraulic circuit also links to each other with secondary hydraulic fluid accumulator with the oil-in of servo valve by secondary check valve.
2. fluid pressure drive device as claimed in claim 1 is characterized in that: the oil return opening of described major and minor hydraulic circuit links to each other with the oil return oil filter by oil cooler, and the oil return oil filter links to each other with fuel tank.
3. fluid pressure drive device as claimed in claim 1 or 2 is characterized in that: described major and minor hydraulic fluid accumulator links to each other with fuel tank by stop valve respectively.
4. fluid pressure drive device as claimed in claim 1 or 2 is characterized in that: also be provided with high-pressure filter between described secondary check valve and the servo valve.
CN2009100270669A 2009-05-25 2009-05-25 Hydraulic drive unit for high-speed continuous hollow blow molding machine CN101564893B (en)

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Application Number Priority Date Filing Date Title
CN2009100270669A CN101564893B (en) 2009-05-25 2009-05-25 Hydraulic drive unit for high-speed continuous hollow blow molding machine

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CN101564893B CN101564893B (en) 2012-01-04

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102168540A (en) * 2011-04-01 2011-08-31 孙茂意 Hydraulic pumping unit with pressure compensation device
CN102966608A (en) * 2012-11-16 2013-03-13 无锡汇虹机械制造有限公司 Energy saving method of intermittent motion hydraulic machinery
CN103056326A (en) * 2012-12-31 2013-04-24 淄博鑫旭电源科技有限公司 Frame type hydraulic clamping grid die-casting machine
CN104088832A (en) * 2013-08-14 2014-10-08 湖南万容科技股份有限公司 Hydraulic system of disintegrating machine and disintegrating machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4304403C2 (en) * 1993-02-11 1994-04-28 Voith Gmbh J M Control device for a hydrostatic drive
CN101380807B (en) * 2008-09-11 2011-01-05 昌盛达机械(浙江)有限公司 Multi-linkage pump energy-saving dynamic system of hollow molding machine
CN201446692U (en) * 2009-05-25 2010-05-05 江苏佳成机械有限公司 Hydraulic driving device in high-speed continuous hollow blow-molding machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102168540A (en) * 2011-04-01 2011-08-31 孙茂意 Hydraulic pumping unit with pressure compensation device
CN102168540B (en) * 2011-04-01 2014-11-19 孙茂意 Hydraulic pumping unit with pressure compensation device
CN102966608A (en) * 2012-11-16 2013-03-13 无锡汇虹机械制造有限公司 Energy saving method of intermittent motion hydraulic machinery
CN103056326A (en) * 2012-12-31 2013-04-24 淄博鑫旭电源科技有限公司 Frame type hydraulic clamping grid die-casting machine
CN104088832A (en) * 2013-08-14 2014-10-08 湖南万容科技股份有限公司 Hydraulic system of disintegrating machine and disintegrating machine
CN104088832B (en) * 2013-08-14 2016-12-28 湖南万容科技股份有限公司 A kind of disintegrating machine hydraulic system and disintegrating machine

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