CN2925843Y - Double-variable proportional closed-loop pump controlling system for injection molding machine - Google Patents
Double-variable proportional closed-loop pump controlling system for injection molding machine Download PDFInfo
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- CN2925843Y CN2925843Y CN 200620034533 CN200620034533U CN2925843Y CN 2925843 Y CN2925843 Y CN 2925843Y CN 200620034533 CN200620034533 CN 200620034533 CN 200620034533 U CN200620034533 U CN 200620034533U CN 2925843 Y CN2925843 Y CN 2925843Y
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Abstract
The utility model is a double variant proportioning closed loop pump control system for an injection molding machine, relating to a pressure and flow double variant control device, solving the problems of high energy consumption and bad control precision of the traditional valve control system. An outlet of a variable pump (7) is connected with a P port of a pressure-compensated valve (5), an inlet of a differential pressure throttle orifice (4), a P port of a proportion direction flow valve (3) and a pressure sensor (1), a output end of the pressure sensor (1) is connected with a pressure feedback signal input end of a controller (13), the two ends of a sloping cam plate (8) of the variable pump (7) are connected with two plunger pistons of a big oil cylinder (6) and a small oil cylinder (9) respectively, the trunnion of the sloping cam plate (8) is connected with a angle transducer (11), a input end of the angle transducer (11) is connected with a pressure feedback signal output end of the controller (13), a signal output end of the controller (13) is connected with a electromagnet signal input end of the proportion direction flow valve (3), a T port of the pressure-compensated valve (5) is connected with a PP port of the proportion direction flow valve (3), and an oil inlet of the big oil cylinder (6) is connected with a PP port of the pressure-compensated valve (5). The utility model is applied to injection molding machine.
Description
Technical field:
The utility model is relevant, especially relevant with bivariate ratio closed loop high accuracy control device with pump control system with injection machine.
Background technology:
Injection machine is the important equipment that plastic products are shaped, and has directly reflected the level of processing and the ability of plastic product industry.Along with the large-scale application and the bright development prospect of plastic product, the demand of process equipments such as injection machine increases day by day, and this makes the energy consumption of machine itself become a very important major issue.Simultaneously, the machining accuracy of partly plastic goods is also more and more higher, and feasible injection machine to accurate and high-accuracy control has produced certain demand.
Existing most of hydraulic injection molding machine system adopts the quantitative open cycle system of valve control of vane pump+PQ valve pattern.It is fast that this system has a response, can realize advantages such as proportion control, but owing to be open loop control, in case when system has been subjected to influencing of factors such as external interference and signal interference, can not be controlled at automatically on the desired value, may the value of departing from objectives.And the processing of assembly and system, installation accuracy also directly have influence on the final control result of system.There is following deficiency in existing system: the one, and the spill losses of system is bigger; The 2nd, produce bigger fuel factor; The 3rd, the power consumption of system is big; The 4th, the control accuracy of system is not high.
The content of utility model:
It is little that the purpose of this utility model provides a kind of power loss, the injection machine that save electricity and control accuracy are high greatly bivariate ratio closed loop pump control system.
The utility model is achieved in that
The utility model injection machine bivariate ratio closed loop pump control system, the P mouth of the outlet of variable pump 7 and pressure-compensated valve 5 and right control end, the inlet of pressure reduction throttle orifice 4, the P mouth of proportion directional flow valve 3, pressure sensor 1 links to each other, the output of pressure sensor 1 links to each other with the feedback pressure signal input of controller 13, the two ends of the swash plate 8 of variable pump 7 are connected with the plunger contact of large tank 6 and small oil tank 9 respectively, the gudgeon of swash plate 8 changes sensor 11 with corner and is connected, the output of rotary angle transmitter 11 links to each other with the feedback flow signal input part of controller 13, the output signal end of controller 13 links to each other with the electromagnet signal input part of proportion directional flow valve 3, the T mouth of pressure-compensated valve 5 links to each other with the PP mouth of proportional flow control valve 3, and the oil-in of large tank 6 is connected with the PP mouth of pressure-compensated valve 5.
The outlet of proportion directional flow valve 3 is connected with damping orifice 2, and the diameter of throttle orifice 2 is φ 0.6～φ 1.6mm.
The big chamber hydraulic fluid port of large tank 6 is arranged in parallel an adaptive damping throttle orifice 10.
The plunger of large tank 6 and small oil tank 9 is connected with two end in contact up and down of swash plate 8 respectively, and small oil tank 9 has back-moving spring, and swash plate 8 is swung around bolster.
The downstream of pressure reduction throttle orifice 4 links to each other with the inlet of safety valve 12.
The meta function of pressure compensated control valve 5 is positive open-type.
The utility model adopts pump control system, can directly more change vane pump, PQ valve and the amplifier of original system with a variable pump.During design of new systems, need not the design of other assembly of change system and interface thereof.By variable pump is carried out the control of system pressure and flow, export the flow that is complementary with system requirements, and carry out pressure control, there is not unnecessary spill losses, greatly reduce energy consumption.Simultaneously, this system is provided with rotary angle transmitter and pressure sensor, can form closed control system to flow and pressure, remains the control result and conforms to desired value.
Description of drawings:
Fig. 1 is a hydraulic schematic diagram of the present utility model.
The specific embodiment:
The utility model is an injection machine bivariate ratio closed loop pump control system, comprise pressure compensated control valve 5, the oil-in of its PP mouth and large tank 6 links to each other, the inlet of P mouth and right control end, pressure reduction throttle orifice 4 and the outlet of pump 7, the P mouth of proportion directional flow valve 3 links to each other, and the downstream of pressure reduction throttle orifice 4 links to each other with the inlet of safety valve 12.The T mouth of pressure compensated control valve 5 links to each other with the PP mouth of proportion directional flow valve 3.Rotary angle transmitter 11 links to each other with the swash plate gudgeon, and pressure sensor 1 is connected the exit of pump 7.The model of pressure sensor 1 is BYQ.
The outlet of proportion directional flow valve 3 is provided with a damping orifice 2, and the diameter of throttle orifice is better between φ 0.6～φ 1.6.
The big chamber hydraulic fluid port of large tank 6 is arranged in parallel a damping orifice 10, and throttle orifice is made the variable orifice pattern.
The two ends of swash plate 8 promote jointly by the plunger of large tank 6 and small oil tank 9 respectively, utilize the spring of small oil tank 9 to reset simultaneously.Swash plate 8 is realized the control to the angle of inclination around the bolster swing.
4 designs of pressure reduction throttle orifice are in pump cover, proportion directional flow valve 3 is made independently hydraulic package with safety valve 12, large tank 6 respectively with pressure compensated control valve 5, unified being installed on the pump cover, the hydraulic fluid port connecting path of each inter-module are pressed the oil circuit relation design channel in the schematic diagram.
The electromagnet signal of proportion directional flow valve 3 links to each other with the output signal terminal of controller 13, receives two control signals of pressure and flow simultaneously.The model of controller 13 is APS-D2-S2-10.
The valve meta function of pressure compensated control valve 5 is designed to positive opening pattern, can relax the requirement of machining accuracy, guarantees pressure controlled stability.
During pressure security control, by the pressure differential detection and the FEEDBACK CONTROL of pressure reduction throttle orifice 4, make large tank plunger overhanging (contracting in the small oil tank plunger), it is almost nil that the promotion swash plate reduces the angle of inclination, pump is in unloading condition, and is irrelevant with the input signal of ratio overflow pressure-reducing valve 3.
During flow-control, less than the setting controlled pressure of valve, proportion directional flow valve 3 is subjected to the control of flow signal to system works pressure all the time, control large tank 6 plungers stretch out or in contract (contract in small oil tank 9 plungers or stretch out) size of control swashplate angle.Simultaneously, controller receives the feedback signal from rotary angle transmitter 11, utilizes the balance angle of deviation signal control swash plate, and the actual output flow value of pump is accurately equated with controlling value.
Pressure when control, the be stressed control of signal of proportion directional flow valve 3, the plunger of control large tank 6 stretches out (contracting in the plunger of small oil tank 9), and the control swashplate angle reduces, and is almost nil, makes the pump off-load, and pressure unloading equals controlling value.Simultaneously, controller receives the feedback signal from pressure sensor 1, utilizes the angle of deviation signal fine setting swash plate, and the actual working pressure value of pump is accurately equated with controlling value.
Claims (5)
1. injection machine is with bivariate ratio closed loop pump control system, it is characterized in that the outlet of variable pump (7) and the P mouth and the right control end of pressure-compensated valve (5), the inlet of pressure reduction throttle orifice (4), the P mouth of proportion directional flow valve (3), pressure sensor (1) links to each other, the output of pressure sensor (1) links to each other with the feedback pressure signal input of controller (13), the two ends of the swash plate (8) of variable pump (7) are connected with the plunger contact of large tank (6) and small oil tank (9) respectively, the gudgeon of swash plate (8) changes sensor (11) with corner and is connected, the output of rotary angle transmitter (11) links to each other with the feedback flow signal input part of controller (13), the output signal end of controller (13) links to each other with the electromagnet signal input part of proportion directional flow valve (3), the T mouth of pressure-compensated valve (5) links to each other with the PP mouth of proportional flow control valve (3), and the oil-in of large tank (6) is connected with the PP mouth of pressure-compensated valve (5).
2. system according to claim 1 is characterized in that the outlet of proportion directional flow valve (3) is connected with damping orifice (2), and the diameter of throttle orifice (2) is φ 0.6～φ 1.6mm.
3. system according to claim 1 is characterized in that the big chamber hydraulic fluid port of large tank (6) is arranged in parallel an adaptive damping throttle orifice (10).
4. system according to claim 1 is characterized in that the downstream of pressure reduction throttle orifice (4) links to each other with the inlet of safety valve (12).
5. system according to claim 1, the meta function that it is characterized in that pressure compensated control valve (5) is positive open-type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620034533 CN2925843Y (en) | 2006-06-09 | 2006-06-09 | Double-variable proportional closed-loop pump controlling system for injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620034533 CN2925843Y (en) | 2006-06-09 | 2006-06-09 | Double-variable proportional closed-loop pump controlling system for injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2925843Y true CN2925843Y (en) | 2007-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620034533 Expired - Fee Related CN2925843Y (en) | 2006-06-09 | 2006-06-09 | Double-variable proportional closed-loop pump controlling system for injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2925843Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496133A (en) * | 2013-10-11 | 2014-01-08 | 宁波巴斯顿机械科技有限公司 | Injection molding machine oil way control system and injection molding machine thereof |
-
2006
- 2006-06-09 CN CN 200620034533 patent/CN2925843Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496133A (en) * | 2013-10-11 | 2014-01-08 | 宁波巴斯顿机械科技有限公司 | Injection molding machine oil way control system and injection molding machine thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20070725 Termination date: 20140609 |