CN202986038U - Frequency control system of injection molding machine vector - Google Patents
Frequency control system of injection molding machine vector Download PDFInfo
- Publication number
- CN202986038U CN202986038U CN 201320012044 CN201320012044U CN202986038U CN 202986038 U CN202986038 U CN 202986038U CN 201320012044 CN201320012044 CN 201320012044 CN 201320012044 U CN201320012044 U CN 201320012044U CN 202986038 U CN202986038 U CN 202986038U
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- servomotor
- control system
- control valve
- vector converter
- injection molding
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Abstract
The utility model discloses a vector frequency control system of an injection molding machine, which comprises a control valve, a fuel tank, an oil outlet pipe, an oil return pipe, a metering pump and a hydraulic oil cylinder used as a power of the injection molding machine, the oil outlet pipe and the oil return pipe are connected between the control valve and the fuel tank, a front cavity and a rear cavity which are separated by a piston are arranged in the hydraulic oil cylinder, and are respectively connected to the control valve, the metering pump is arranged on the oil outlet pipe and is connected to an actuating motor in a transmission manner, the actuating motor is electrically connected to a vector frequency controller and is also provided with a rotary encoder, signals outputted by the rotary encoder are inputted into the vector frequency controller, a pressure sensor is arranged on the oil outlet pipe, signals outputted by the pressure sensor are also inputted into the vector frequency controller. According to the vector frequency control system of the injection molding machine provided by the utility model, each subsystem has clear division work and can accomplish function reliably, the design is reasonable, the energy-saving performance is good, the control accuracy is high, the real-time performance is good, and the dynamic response is rapid.
Description
Technical field
The utility model relates to a kind of control system of injection machine industry, especially a kind of injection machine vector converter control system.
Background technology
Along with the development of society, injection machine is more and more widely used; Existing injection machine is normally used is servo-control system, injection machine comprises control valve, fuel tank, flowline, oil return pipe, constant displacement pump and hydraulic jack, flowline and oil return pipe are connected between control valve and fuel tank, hydraulic jack is as the injection machine power source, control valve is controlled the break-make of two chamber oil circuits of hydraulic jack, constant displacement pump is arranged on flowline as whole hydraulic system provides pressure, because servo-control system is that control accuracy is lower in the course of the work, real-time is relatively poor, dynamic response is also relatively slow for the injection machine that forms of core.
Summary of the invention
The purpose of this utility model is that a kind of energy-efficient performance that designs for the deficiency that solves above-mentioned technology is good, control accuracy is higher, the faster division of labor simultaneously of response speed is clear and definite, can reliably complete the injection machine vector converter control system of function separately.
the injection machine vector converter control system that the utility model is designed, comprise control valve, fuel tank, flowline, oil return pipe, constant displacement pump and as the hydraulic jack of injection machine power, described flowline and oil return pipe are connected between control valve and fuel tank, be provided with former and later two chambers that separated by piston in described hydraulic jack, these two chambers are connected with control valve respectively, described constant displacement pump is arranged on flowline, the constant displacement pump upper driving is connected with servomotor, be electrically connected with the vector converter controller on described servomotor, also be provided with rotary encoder on servomotor, its output signal inputs to the vector converter controller, described flowline is provided with pressure sensor, and its output signal also inputs to the vector converter controller.
During work, in this system, servomotor, rotary encoder, vector converter controller have formed a close loop control circuit, and the vector converter controller can accurately be controlled the rotation of servomotor; Pressure sensor, servomotor, vector converter controller and constant displacement pump have formed again the another one close loop control circuit, pressure sensor can effectively be measured the pressure condition on oil pipe, and with signal feedback to the vector converter controller, the vector converter controller is effectively controlled servomotor according to setting, and then adjustment quantitative pump, due to closely related at flowline upward pressure and flow, this vector converter control system can have two kinds of duties: flow-control state and pressure control state are equivalent to the work of analogue flow rate proportioning valve and pressure proportioning valve; Under the flow-control state, the detected pressure of pressure sensor is less than the pressure of setting, and servomotor is namely controlled the rotating speed of servomotor by the work of flow-control state, makes the output flow of constant displacement pump keep reaching setting value; Under pressure control state, pressure sensor monitoring to pressure will reach or reach when setting value, the torque of servomotor is namely controlled in the work of servomotor pressing force state of a control, makes the output pressure of constant displacement pump and flow remain on setting value.
As preferably: described servomotor is permagnetic synchronous motor, and permagnetic synchronous motor can reach higher control accuracy.
The injection machine vector converter control system that the utility model is designed, its beneficial effect is: in the designed vector control system of the utility model each subsystem division of labor clear and definite, can reliably complete function separately, and reasonable in design; Energy-efficient performance is good, and control accuracy is higher, real-time is better, dynamic response is faster.
Description of drawings
Fig. 1 is the overall structure schematic diagram of embodiment 1.
In figure: hydraulic jack 1, pressure sensor 2, servomotor 3, rotary encoder 4, vector converter controller 5, flowline 6, oil return pipe 7, control valve 8, fuel tank 9, constant displacement pump 10.
The specific embodiment
The utility model will be further described by reference to the accompanying drawings below by embodiment.
Embodiment 1:
as shown in Figure 1, the described injection machine vector converter of the present embodiment control system, comprise control valve 8, fuel tank 9, flowline 6, oil return pipe 7, constant displacement pump 10 and as the hydraulic jack 1 of injection machine power, described flowline 6 and oil return pipe 7 are connected between control valve 8 and fuel tank 9, be provided with former and later two chambers that separated by piston in described hydraulic jack 1, these two chambers are connected with control valve 8 respectively, described constant displacement pump 10 is arranged on flowline 6, constant displacement pump 10 upper drivings are connected with servomotor 3, it is characterized in that: be electrically connected with vector converter controller 5 on described servomotor 3, also be provided with rotary encoder 4 on servomotor 3, its output signal inputs to vector converter controller 5, described flowline 6 is provided with pressure sensor 2, and its output signal also inputs to vector converter controller 5, wherein the described servomotor 3 of the present embodiment is permagnetic synchronous motor, certainly also can adopt other servomotor 3.
during work, in this system, servomotor 3, rotary encoder 4, vector converter controller 5 have formed a close loop control circuit, and vector converter controller 5 can accurately be controlled the rotation of servomotor 3, pressure sensor 2, servomotor 3, vector converter controller 5 and constant displacement pump 10 have formed again the another one close loop control circuit, pressure sensor can 3 pressure condition of effectively measuring on oil pipe 6, and with signal feedback to vector converter controller 5, vector converter controller 5 is effectively controlled servomotor 3 according to setting, and then adjustment quantitative pump 10, due to closely related at flowline 6 upward pressures and flow, this vector converter control system can have two kinds of duties: flow-control state and pressure control state, be equivalent to the work of analogue flow rate proportioning valve and pressure proportioning valve, under the flow-control state, the detected pressure of pressure sensor 2 is less than the pressure of setting, and servomotor 3 is namely controlled the rotating speed of servomotor 3 by the work of flow-control state, makes the output flow of constant displacement pump 10 keep reaching setting value, under pressure control state, when the pressure that pressure sensor 2 monitors will reach or reach setting value, the torque of servomotor 3 was namely controlled in servomotor 3 pressing force state of a control work, makes the output pressure of constant displacement pump 10 and flow remain on setting value.
The described injection machine vector converter of the present embodiment control system, each subsystem division of labor is clear and definite, can reliably complete function separately, and reasonable in design; Energy-efficient performance is good, and control accuracy is higher, real-time is better, dynamic response is faster.
Claims (2)
1. injection machine vector converter control system, comprise control valve (8), fuel tank (9), flowline (6), oil return pipe (7), constant displacement pump (10) and as the hydraulic jack (1) of injection machine power, described flowline (6) and oil return pipe (7) are connected between control valve (8) and fuel tank (9), be provided with former and later two chambers that separated by piston in described hydraulic jack (1), these two chambers are connected with control valve (8) respectively, described constant displacement pump (10) is arranged on flowline (6), constant displacement pump (10) upper driving is connected with servomotor (3), it is characterized in that: be electrically connected with vector converter controller (5) on described servomotor (3), also be provided with rotary encoder (4) on servomotor (3), its output signal inputs to vector converter controller (5), described flowline (6) is provided with pressure sensor (2), and its output signal also inputs to vector converter controller (5).
2. injection machine vector converter control system according to claim 1, it is characterized in that: described servomotor (3) is permagnetic synchronous motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320012044 CN202986038U (en) | 2013-01-10 | 2013-01-10 | Frequency control system of injection molding machine vector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320012044 CN202986038U (en) | 2013-01-10 | 2013-01-10 | Frequency control system of injection molding machine vector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202986038U true CN202986038U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320012044 Expired - Lifetime CN202986038U (en) | 2013-01-10 | 2013-01-10 | Frequency control system of injection molding machine vector |
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| CN (1) | CN202986038U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108375405A (en) * | 2018-01-29 | 2018-08-07 | 中国第汽车股份有限公司 | Liquid flow measurement device and measurement method |
-
2013
- 2013-01-10 CN CN 201320012044 patent/CN202986038U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108375405A (en) * | 2018-01-29 | 2018-08-07 | 中国第汽车股份有限公司 | Liquid flow measurement device and measurement method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |