CN201432406Y - Energy-saving hydraulic system of hollow blow molding machine - Google Patents
Energy-saving hydraulic system of hollow blow molding machine Download PDFInfo
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- CN201432406Y CN201432406Y CN2009200449890U CN200920044989U CN201432406Y CN 201432406 Y CN201432406 Y CN 201432406Y CN 2009200449890 U CN2009200449890 U CN 2009200449890U CN 200920044989 U CN200920044989 U CN 200920044989U CN 201432406 Y CN201432406 Y CN 201432406Y
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Abstract
The utility model relates to an energy-saving hydraulic system of a hollow blow molding machine, which comprises a variable plunger pump (1), an electromagnetic reversing valve (2), a first one-way valve (3), a second one-way valve (7), a third one-way valve (13), a pressure reducing valve (14), a main system energy accumulator (6), a pressure relay (4), a proportional pressure reducing valve (8),a servo system energy accumulator (9), a servo valve (11) and a wall thickness control servo oil cylinder (10), wherein the variable plunger pump (1) is connected with the electromagnetic reversing valve (2), one working oil port of the electromagnetic reversing valve (2) is connected with the oil inlet of the second one-way valve (7), the other working oil port of the electromagnetic reversing valve (2) is connected with the first one-way valve (3) and the pressure reducing valve (14), the first one-way valve (3) is respectively connected with the main system energy accumulator (6) and the proportional pressure reducing valve (8), the pressure reducing valve (14) is connected with the third one-way valve (13), the third one-way valve (13) is respectively connected with the servo system energy accumulator (9) and the servo valve (11), and the working oil port of the servo valve (11) is connected with the wall thickness control servo oil cylinder (10). The utility model has the advantages that the overflow losses are thoroughly eliminated, the running speed is fast and the adaptability is high.
Description
(1) technical field
The utility model relates to a kind of storing type blow molding machine.Belong to the plastics machinery technical field.
(2) background technology
The operation of storing type blow molding machine generally comprises the folding of mould, the ejaculation of melt, the advance and retreat folding that blows afloat device, the actions such as folding of submodule.Be characterized in:
Everything all is to carry out in chronological order, and the required pressure of each action also has nothing in common with each other;
The required flow of everything is widely different.As shown in Figure 1.The required flow of the folding of template and the ejaculation of melt is very big, and the required flow of other action is less;
In a molding cycle, the time of locked mode pressurize is longer, and the time of execution action is shorter relatively.
The general hydraulic system that adopts as shown in Figure 2 of tradition blow molding machine.The fuel system that adds a proportional pressure control valve by a constant flow paddle pump.There are following shortcomings in this system:
1, this system must select the discharge capacity of oil pump according to the peak value of required flow, therefore causes pump delivery very big, and the power of motor is also very big, produces a large amount of spill losses when low discharge;
2, because pump delivery is very big, cause a lot of auxiliary elements to select bigger model (as oil filter, valve, cooler, oil pipe etc.) for use.
For overcoming above-mentioned deficiency, some have also appearred in present hollow blow molding industry is the novel hydraulic solution of main purpose with energy-conservation.Mainly be divided into two kinds of forms.These two kinds of forms all are to carry out the real-time means that are controlled to be with the output flow to pump, reach the purpose of eliminating or reducing spill losses, and then reduce unnecessary energy loss.
First kind of solution replaces traditional constant displacement pump to add proportional pressure control valve with two rate variable plunger displacement pumps as shown in Figure 3.Its advantage is a pressure oil output as required, has thoroughly eliminated spill losses.Shortcoming is to want the speed of safety action still will select the oil pump and the more powerful Oil pump electrical machinery of discharge capacity greatly for use.At this moment the speed of service of equipment just forms contradiction with the energy-conservation ratio of equipment and the manufacturing cost of equipment, so generally can select the method for a compromise: reduce the requirement of some speed aspects, so the speed of service of this kind equipment generally can be slower than legacy system.
Second kind of solution as shown in Figure 4.On the Oil pump electrical machinery of conventional hydraulic, add variable-frequency governor.Change the output quantity of pressure oil by the rotating speed of real time altering pump, reach and reduce spillway discharge and then reach purpose of energy saving.Its shortcoming is slow to low discharge or the response speed of low discharge when big flow switches from big flow, and shorter for some cycles, the adaptability of the process requirements that the action switching is more frequent is relatively poor, and spill losses can not fundamentally be eliminated by this system.
Above-mentioned two kinds of energy-saving schemes though played energy-conservation effect to a certain extent, exist tangible deficiency simultaneously again.
(3) summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of and can thoroughly eliminate spill losses, fast, the adaptable blow molding machine energy-saving hydraulic system of the speed of service.
The purpose of this utility model is achieved in that a kind of blow molding machine energy-saving hydraulic system, comprise Variable plunger pump, solenoid directional control valve, first check valve, second check valve, the 3rd check valve, pressure-reducing valve, the main system accumulator, pressure switch, proportional pressure-reducing valve, the servo-drive system accumulator, servo valve and wall thickness control servo-cylinder, described Variable plunger pump oil-out links to each other with the solenoid directional control valve oil-in, one actuator port of solenoid directional control valve links to each other with the second check valve oil-in, another actuator port links to each other with the pressure-reducing valve oil-in with the first check valve oil-in respectively, the first check valve oil-out links to each other with the proportional pressure-reducing valve oil-in with main system accumulator oil-in respectively, the main system accumulator links to each other with pressure switch, the pressure-reducing valve oil-out links to each other with the 3rd check valve oil-in, the 3rd check valve oil-out links to each other with the servo valve oil-in with servo-drive system accumulator oil-in respectively, and the servo valve actuator port links to each other with wall thickness control servo-cylinder.
The beneficial effects of the utility model are:
1, adopts variable pump or constant displacement pump to add the hydraulic pressure accumulator and provide pressure oil, thoroughly eliminated the spill losses of system, and reduced the discharge capacity of oil pump and the power of drive motors to each action of system.
2, the pressure oil of main system accumulator is that each carries out the action fuel feeding by a proportional pressure-reducing valve is given equipment, can provide different pressure to each action flexibly as required.The speed of service is fast, and adaptability is strong.
3, provide the off-load of signal controlling oil pump low pressure by pressure sensor when the fluid in the main system accumulator is charged to the pressure of setting, at this moment fluid through the subcooler cooling that circulates, reduces the oil temperature with extremely low pressure, guarantees the service life of system.
(4) description of drawings
Fig. 1 is the general blow molding machine action and the graph of a relation of flow.
Fig. 2 is the local figure one of traditional hollow blow molding machine hydraulic system.
Fig. 3 is the local figure two of traditional hollow blow molding machine hydraulic system.
Fig. 4 is the local figure three of traditional hollow blow molding machine hydraulic system.
Fig. 5 is the utility model blow molding machine energy-saving hydraulic system figure.
Fig. 6 is the local figure of the utility model blow molding machine energy-saving hydraulic system.
Among the figure: Variable plunger pump 1, solenoid directional control valve 2, first check valve 3, pressure switch 4, stop valve 5, main system accumulator 6, second check valve 7, proportional pressure-reducing valve 8, servo-drive system accumulator 9, wall thickness control servo-cylinder 10, servo valve 11, high-pressure filter 12, the 3rd check valve 13, pressure-reducing valve 14, stop valve 15, oil cooler 16, oil return oil filter 17, oil suction filter screen 18.
(5) specific embodiment
Referring to Fig. 5, the utility model blow molding machine energy-saving hydraulic system mainly is made up of Variable plunger pump 1, solenoid directional control valve 2, first check valve 3, second check valve 7, the 3rd check valve 13, pressure-reducing valve 14, main system accumulator 6, pressure switch 4, proportional pressure-reducing valve 8, servo-drive system accumulator 9, servo valve 11 and wall thickness control servo-cylinder 10.Described Variable plunger pump 1 oil-out links to each other with solenoid directional control valve 2 oil-ins, one actuator port of solenoid directional control valve 2 links to each other with second check valve, 7 oil-ins, another actuator port links to each other with pressure-reducing valve 14 oil-ins with first check valve, 3 oil-ins respectively, first check valve, 3 oil-outs link to each other with proportional pressure-reducing valve 8 oil-ins with main system accumulator 6 oil-ins respectively, main system accumulator 6 links to each other with pressure switch 4, pressure-reducing valve 14 oil-outs link to each other with the 3rd check valve 13 oil-ins, the 3rd check valve 13 oil-outs link to each other with servo valve 11 oil-ins with servo-drive system accumulator 9 oil-ins respectively, and servo valve 11 actuator ports link to each other with wall thickness control servo-cylinder 10.
The process characteristic of storing type blow molding machine as shown in Figure 1, the required flow of each action is widely different, and the total time of carrying out action is at shared ratio of the whole service cycle of equipment very little (20%--30%).According to this characteristic, native system employing pump adds the fuel system of accumulator, as shown in Figure 5.Utilize a large amount of free time that accumulator is carried out topping up, with the oil mass that guarantees that following one-period is required.The discharge capacity of oil pump can be calculated according to following formula:
So just avoided the restriction of peak flow, selected the oil pump and the low power Oil pump electrical machinery of very little discharge capacity, in addition accumulator again moment export very large flow, well satisfied the requirement that equipment develops to the high speed direction.
The pressure oil that accumulator comes out must distribute effectively.As shown in Figure 5,8 is a proportional pressure-reducing valve, change system pressure that can be real-time, avoided in addition joining a pressure-reducing valve or proportional reversing valve for each road action, simplify system, lowered the manufacturing cost of system, and provide convenience for the sequencing of equipment control.Realized that not only a valve controls the pressure of a plurality of actions, and compared with the mode of manual voltage regulation, debug more convenient, and the technological parameter that controller can the storing multiple sets goods.
The pressure oil one tunnel of Variable plunger pump 1 output is supplied with main system accumulator 6, and servo-drive system accumulator 9 is supplied with through pressure-reducing valve 14 in another road.Other hydraulic system all be adopt one independently oil sources be the servo-drive system fuel feeding, as shown in Figure 6.Native system organically combines two systems, has simplified system, and owing to use accumulator to the servo-drive system fuel feeding, and the pulsation when having eliminated the independent fuel feeding of oil pump is to the influence of servo dynamic response precision.
The pressure oil of Variable plunger pump 1 output is through solenoid directional control valve 2.When the fluid in the main system accumulator 6 was charged to the pressure of setting, pressure switch 4 can provide signal, and at this moment solenoid directional control valve 2 will be in meta, and Variable plunger pump is by " n " type function off-load of meta.Fluid is got back to fuel tank with extremely low pressure through oil cooler.This is a hydronic process of fluid, and effectively the oil of control system is warm, guarantees the service life of system.When the fluid in the main system accumulator 6 be lower than setting the time, pressure sensor 4 also can provide signal, it is electric that the coil b of solenoid directional control valve 2 is got, and gives main system main system topping up.When mould supercharging locked mode, the coil a of solenoid directional control valve 2 gets electric, and the hydraulic oil of Variable plunger pump output directly enters Mode-locking oil cylinder.
Claims (1)
1, a kind of blow molding machine energy-saving hydraulic system, it is characterized in that described system comprises Variable plunger pump (1), solenoid directional control valve (2), first check valve (3), second check valve (7), the 3rd check valve (13), pressure-reducing valve (14), main system accumulator (6), pressure switch (4), proportional pressure-reducing valve (8), servo-drive system accumulator (9), servo valve (11) and wall thickness control servo-cylinder (10), described Variable plunger pump (1) oil-out links to each other with solenoid directional control valve (2) oil-in, one actuator port of solenoid directional control valve (2) links to each other with second check valve (7) oil-in, another actuator port links to each other with pressure-reducing valve (14) oil-in with first check valve (3) oil-in respectively, first check valve (3) oil-out links to each other with proportional pressure-reducing valve (8) oil-in with main system accumulator (6) oil-in respectively, main system accumulator (6) links to each other with pressure switch (4), pressure-reducing valve (14) oil-out links to each other with the 3rd check valve (13) oil-in, the 3rd check valve (13) oil-out links to each other with servo valve (11) oil-in with servo-drive system accumulator (9) oil-in respectively, and servo valve (11) actuator port links to each other with wall thickness control servo-cylinder (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200449890U CN201432406Y (en) | 2009-05-25 | 2009-05-25 | Energy-saving hydraulic system of hollow blow molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200449890U CN201432406Y (en) | 2009-05-25 | 2009-05-25 | Energy-saving hydraulic system of hollow blow molding machine |
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| Publication Number | Publication Date |
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| CN201432406Y true CN201432406Y (en) | 2010-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009200449890U Expired - Fee Related CN201432406Y (en) | 2009-05-25 | 2009-05-25 | Energy-saving hydraulic system of hollow blow molding machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108973087A (en) * | 2018-09-28 | 2018-12-11 | 张家港市联鑫塑料机械有限公司 | Zhu Chui hollow molding mechanism hydraulic shock slowing mechanism |
-
2009
- 2009-05-25 CN CN2009200449890U patent/CN201432406Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108973087A (en) * | 2018-09-28 | 2018-12-11 | 张家港市联鑫塑料机械有限公司 | Zhu Chui hollow molding mechanism hydraulic shock slowing mechanism |
| CN108973087B (en) * | 2018-09-28 | 2024-02-20 | 张家港市联鑫塑料机械有限公司 | Hydraulic impact buffer mechanism of injection blow hollow forming mechanism |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100331 Termination date: 20130525 |