CN206277627U - Energy-saving servo type hydraulic injection molding machine servo power device - Google Patents
Energy-saving servo type hydraulic injection molding machine servo power device Download PDFInfo
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- CN206277627U CN206277627U CN201621178392.1U CN201621178392U CN206277627U CN 206277627 U CN206277627 U CN 206277627U CN 201621178392 U CN201621178392 U CN 201621178392U CN 206277627 U CN206277627 U CN 206277627U
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Abstract
The utility model discloses a kind of energy-saving servo type hydraulic injection molding machine servo power device, including fuel tank, oil pump, synchronous motor, motor encoder, servo controller and pressure sensor, the energy-saving servo type hydraulic injection molding machine servo power device further includes a distribution pipeline, the two ends of the distribution pipeline are connected with outlet line and fuel tank respectively, and magnetic valve and hydraulic damper are provided with the distribution pipeline.The utility model retains hydraulic servo power energy-saving characteristic, and abrasion condition of the oil pump under torque mode can be improved again, greatly extends the service life of oil pump, and the maintenance cost of hydraulic pressure is greatly reduced, and brings huge economic benefit.
Description
Technical field
The utility model is related to hydraulic injection molding machine servo power field, more particularly to a kind of liquid of energy-saving servo type injection machine
Pressure servo power device.
Background technology
Injection machine industry energy-saving servo type injection machine, its hydraulic power system is typically as shown in Figure 1.Oil pump 2 is in driver
Control under, realize the control to the flow and pressure of hydraulic system.The output flow (Q) of oil pump 2 is equal to the discharge capacity of oil pump 2
Q rotating speed (n) that () is multiplied by motor 1 is multiplied by the volumetric efficiency (η) of oil pump 2, i.e.,：Q=η × q × n.Servo controller 6 typically has two
Plant mode of operation：Velocity mode and torque mode.In velocity mode, what servo controller 6 was given to computer (host computer) turns
Speed instruction, the actual speed fed back with motor encoder 5 is contrasted, in the speed loop of servo controller 6 after PID arithmetic
Produce the command value of the rotating speed of motor 4.In torque mode, the pressure instruction that servo controller 6 is given to computer (host computer), with
The value of feedback of pressure sensor 7 in hydraulic system, torque loop in the drive produces the voltage of motor 4 after PID arithmetic
And current value.
In setting value of the hydraulic system load less than computer, the controlled motor 4 of servo controller 6 presses the rotating speed of computer setting
Output.The talent of oil pump 2 provides flow by corresponding rotating speed to hydraulic system.
When the pressure load of hydraulic system reaches the instruction of host computer, now in order to prevent hydraulic system pressure superelevation,
Servo controller 6 will slow down to motor 4, and through the condition judgment of the inner setting of servo controller 6, condition meet after voluntarily
Into torque control pattern, the pressure of hydraulic system is controlled.Now the rotating speed of motor 4 is only used for supplementing letting out for hydraulic system generation
Leakage.
Hydraulic servo dynamical system is realized needing to provide flow and pressure by load, and volumetric efficiency is high, does not produce extra
Overflow and loss, reach the purpose of energy-conservation.
But there is following defect in the hydraulic servo dynamical system of existing energy-saving servo type injection machine：
Friction pair is all carried because the inside of oil pump 2 is general, by taking high pressure crescent gear pump as an example, in hydraulic servo dynamical system
After system enters torque mode, at the beginning because the volumetric efficiency of hydraulic system is higher, the leakage of hydraulic system is less, causes only to need
Wanting the oil of very little flow can just meet.Such case is directly resulted in when torque mode, high pressure crescent gear pump
Rotating speed is very low.By test, rotating speed not super 50rpm during its torque mode.Refer to table 1：
Pump speed under table 1, oil pump torque mode
By taking floating side plate as an example, it belongs to gear face, and abrasion is secondary, and its lubrication is formed between end face by friction pair
Dynamic pressure oil film is lubricated.According to tribology and theory of fluid lubrication, oil film is formed between rubbing surface, wherein important must
It is exactly to have enough relative velocities between friction pair to want condition.Hydraulic servo dynamical system, under driver torque Schema control,
Its rotating speed is very low.The minimum speed of oil pump permission is exceeded.This when, rubbing surface was likely to form boundary friction, even
Dry friction.More serious situation, hydraulic system be in high load condition when, floating side plate under the back pressure effect of back pressure chamber,
Rubbing surface will produce serious abrasion, or even sintering occur.
Above-mentioned phenomenon, gently then causes to let out increases in oil pump 2, and system effectiveness declines, oil temperature rising, heavy then cause oil pump to damage
Bad, action is not normal, and security threat is caused to personnel and equipment.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of energy-saving servo type injection machine liquid
Pressure servo power device, it can solve the problems, such as abrasion condition of the oil pump under torque mode.
The purpose of this utility model is realized using following technical scheme：
A kind of energy-saving servo type hydraulic injection molding machine servo power device, including fuel tank, oil pump, synchronous motor, motor encoder
Device, servo controller and pressure sensor, the oil inlet end of the oil pump connected by in-line with fuel tank, and the oil pump goes out
Oily end is connected by outlet line with load, and the rotary shaft of the oil pump is connected with the rotary shaft of synchronous motor, and the motor is compiled
Code device is arranged on synchronous motor, and the motor encoder is engaged with the rotating shaft of synchronous motor, and the pressure sensor is installed on
In outlet line, and the output end of motor encoder and the output end of pressure sensor are respectively electrically connected to servo controller
Two signal input parts, the output end of the servo controller is electrically connected with the control end of synchronous motor, the energy-saving servo type
Hydraulic injection molding machine servo power device further includes a distribution pipeline, the two ends of the distribution pipeline respectively with outlet line and
Fuel tank is connected, and magnetic valve and hydraulic damper are provided with the distribution pipeline.
Preferably, the energy-saving servo type hydraulic injection molding machine servo power device further includes a pressure gauge, the pressure
Power table is electrically connected with the output end of pressure sensor.
Preferably, the distribution pipeline is located at the both sides of pressure sensor with the junction of outlet line and oil pump respectively.
Preferably, the inside of the oil pump carries friction pair, and by film lubrication, such as high pressure crescent gear pump.
Preferably, the synchronous motor uses permanent magnet synchronous ac motor.
Preferably, the magnetic valve be common low-power consumption electromagnetic valve, solenoid operated with manual reset valve and bi-bit bi-pass, two three
Any one in logical, two-position four-way, two-position-five-way solenoid valve etc., opens as long as can guarantee that and reach host computer setting value in load pressure
Shunting circuit where opening hydraulic damper.
Compared to existing technology, the beneficial effects of the utility model are：
1st, a magnetic valve, after torque control pattern is transferred to, magnetic valve are increased at the oil discharge outlet of hydraulic power oil circuit
It is powered, now oil pump oil discharge outlet is connected with hydraulic damper, there is pressure differential at hydraulic damper two ends, forms one from oil pump
To the loop of fuel tank, by above-mentioned loop, when torque mode, actively increase to hydraulic system and leak, servo power system
System will improve the pump speed of oil pump to maintain system pressure.Minimum speed scope according to oil pump, selects suitable liquid
Pressure damper, makes oil pump in high pressure pressurize, is operated in rational rotating speed so that each friction pair can smoothly form dynamic in oil pump
Force feed film, each friction pair obtains good lubrication, extends the service life of oil pump, so as to solve abrasion of the oil pump under torque mode
The problem of situation, and retain hydraulic servo power energy-saving characteristic.
The oil circuit scheme of the 2nd, simple and reliable, great operability, had both retained hydraulic servo power energy-saving characteristic, and can improve
Abrasion condition of the oil pump under torque mode, greatly extends the service life of oil pump, and the maintenance cost of hydraulic pressure is greatly reduced,
Bring huge economic benefit.
3rd, the utility model may be not only suitable for crescent gear pump, have friction pair to the inside of other structures, and lean on
The oil pump of film lubrication is equally applicable, and applicability is very wide.
Brief description of the drawings
Fig. 1 is existing hydraulic servo principle of dynamics figure；
Fig. 2 is the schematic diagram of energy-saving servo type hydraulic injection molding machine servo power device described in the utility model.
In figure：1- fuel tanks；2- oil pumps；3- pressure gauges；4- synchronous motors；5- motor encoders；6- servo controllers；7- is pressed
Force snesor；8- hydraulic dampers；9- magnetic valves.
Specific embodiment
Below, with reference to accompanying drawing and specific embodiment, the utility model is described further：
As shown in Fig. 2 a kind of energy-saving servo type hydraulic injection molding machine servo power device, including fuel tank 1, oil pump 2, pressure gauge
3rd, synchronous motor 4, motor encoder 5, servo controller 6 and pressure sensor 7, the oil inlet end of oil pump 2 by in-line with
Fuel tank 1 is connected, and the oil outlet end of oil pump 2 is connected by outlet line with load (oil-using units).Synchronous motor 4 by shaft coupling with
The rotary shaft connection of oil pump 2, servo controller 6 is used for controlling the rotating speed of synchronous motor 4, and such as servo controller 6 passes through frequency conversion
Device realizes the regulation of the rotating speed to synchronous motor 4, meanwhile, motor encoder 5, motor encoder 5 are installed on synchronous motor 4
Rotating shaft with synchronous motor 4 is engaged, and the rotation number of turns data is activation of the synchronous motor 4 that motor encoder 5 will be collected is to servo
Controller 6, so by servo controller 6 by the rotation number of turns data conversion into synchronous motor 4 rotating speed.The He of servo controller 6
Pressure gauge 3 is electrically connected with pressure sensor 7 respectively, and pressure sensor 7 is installed in the outlet line of oil pump 2, for gathering oil
The pressure signal to the oil mass pressure for loading and is sent to servo controller 6 and pressure gauge 3, certain pressure gauge 3 by the output of pump 2
Also shown after directly being acquired to the pressure of the outlet line of oil pump 2.In order to prevent that oil pump being made under torque control pattern
Into damage, in the utility model preferred embodiment, distribution pipeline, isocon are also communicated with the outlet line of oil pump 2
In the other end insertion fuel tank 1 on road.Magnetic valve 9 and hydraulic damper 8 are installed, magnetic valve 9 and hydraulic pressure hinder on the distribution pipeline
The position of Buddhist nun's device 8 does not limit, and preferably magnetic valve 9 is near outlet line.Host computer is reached in the outlet line pressure of oil pump 2 to set
During fixed pressure, opens solenoid valve 9 causes that the outlet line and fuel tank 1 of distribution pipeline UNICOM oil pump 2 are shunted, it is clear that pressure
Force snesor 7 is located in the outlet line between oil pump 2 and distribution pipeline and outlet line junction.
Wherein, the inside of oil pump 2 obviously carries friction pair, for example, can use high pressure crescent gear pump.Synchronous motor 4 is used
Permanent magnet synchronous ac motor.Magnetic valve 9 is the break-make of guarantee distribution pipeline, can use two-position four way change valve.
The operation principle of energy-saving servo type hydraulic injection molding machine servo power device is：After torque control pattern is transferred to, electricity
Magnet valve 9 is powered, and now oil pump oil discharge outlet is connected with hydraulic damper 8, there is pressure differential at the two ends of hydraulic damper 8, forms one
The individual loop from oil pump to fuel tank.The big I of flow Q in this loop presses the flow formula in thin-walled aperture in the hydrodynamics stated
(1) estimated：
Wherein：Cd:The damping discharge coefficient of hydraulic damper 8；A:The orifice area of hydraulic damper 8；ΔP:Hydraulic pressure hinders
Pressure difference before and after the aperture of Buddhist nun's device 8；ρ：The density of fluid (being here oil).
By above-mentioned oil circuit, when servo controller 6 performs torque mode, actively increase to hydraulic system and leak,
Servo power system will improve the pump speed designers of oil pump by according to the minimum of oil pump to maintain system pressure
The range of speeds, by the calculating of formula (1), selects suitable hydraulic damper 8, makes oil pump 2 in high pressure pressurize, is operated in
Rational rotating speed so that each friction pair can smoothly form dynamic pressure oil film in oil pump 2, each friction pair obtains good lubrication, extension oil
The service life of pump.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
It is corresponding to change and deformation, and all these change and deformation should all belong to the protection of the utility model claim
Within the scope of.
Claims (6)
1. a kind of energy-saving servo type hydraulic injection molding machine servo power device, including fuel tank, oil pump, synchronous motor, motor encoder,
Servo controller and pressure sensor, the oil inlet end of the oil pump are connected by in-line with fuel tank, the oil pump it is fuel-displaced
End is connected by outlet line with load, and the rotary shaft of the oil pump is connected with the rotary shaft of synchronous motor, the motor encoder
Device is arranged on synchronous motor, and the motor encoder is engaged with the rotating shaft of synchronous motor, and the pressure sensor is installed on out
On oil pipe line, and the output end of motor encoder and the output end of pressure sensor are respectively electrically connected to the two of servo controller
Individual signal input part, the output end of the servo controller is electrically connected with the control end of synchronous motor, it is characterised in that described to watch
Take energy-saving injection machine hydraulic servo power set and further include a distribution pipeline, the two ends of the distribution pipeline respectively with go out
Oil pipe line is connected with fuel tank, and magnetic valve and hydraulic damper are provided with the distribution pipeline.
2. energy-saving servo type hydraulic injection molding machine servo power device according to claim 1, it is characterised in that the servo
Energy-saving injection machine hydraulic servo power set further include the output end of a pressure gauge, the pressure gauge and pressure sensor
Electrical connection.
3. energy-saving servo type hydraulic injection molding machine servo power device according to claim 1, it is characterised in that the shunting
Pipeline is with the junction of outlet line and oil pump respectively positioned at the both sides of pressure sensor.
4. the energy-saving servo type hydraulic injection molding machine servo power device according to claim any one of 1-3, it is characterised in that
The oil pump is high pressure crescent gear pump.
5. the energy-saving servo type hydraulic injection molding machine servo power device according to claim any one of 1-3, it is characterised in that
The synchronous motor uses permanent magnet synchronous ac motor.
6. the energy-saving servo type hydraulic injection molding machine servo power device according to claim any one of 1-3, it is characterised in that
The magnetic valve is two-position four way change valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621178392.1U CN206277627U (en) | 2016-10-27 | 2016-10-27 | Energy-saving servo type hydraulic injection molding machine servo power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621178392.1U CN206277627U (en) | 2016-10-27 | 2016-10-27 | Energy-saving servo type hydraulic injection molding machine servo power device |
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| Publication Number | Publication Date |
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| CN206277627U true CN206277627U (en) | 2017-06-27 |
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| CN201621178392.1U Active CN206277627U (en) | 2016-10-27 | 2016-10-27 | Energy-saving servo type hydraulic injection molding machine servo power device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916164A (en) * | 2018-07-09 | 2018-11-30 | 安徽天翔包装机械有限公司 | A kind of control system of environmentally protective corrugation machine hydraulic system |
-
2016
- 2016-10-27 CN CN201621178392.1U patent/CN206277627U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916164A (en) * | 2018-07-09 | 2018-11-30 | 安徽天翔包装机械有限公司 | A kind of control system of environmentally protective corrugation machine hydraulic system |
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