CN206357693U - A kind of energy-efficient hydraulic press of large-tonnage - Google Patents
A kind of energy-efficient hydraulic press of large-tonnage Download PDFInfo
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- CN206357693U CN206357693U CN201621472643.7U CN201621472643U CN206357693U CN 206357693 U CN206357693 U CN 206357693U CN 201621472643 U CN201621472643 U CN 201621472643U CN 206357693 U CN206357693 U CN 206357693U
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Abstract
The utility model discloses a kind of energy-efficient hydraulic press of large-tonnage, it is made up of underframe, portal frame, hydraulic cylinder and hydraulic system for actuating hydraulic cylinder, hydraulic system includes high-pressure oil pump, low pressure fuel pump, variable-frequency motor, wherein：High-pressure oil pump is connected through high pressure unloading loop with oil feed line；Three tunnels of low pressure fuel pump oil-out point, it is connected all the way by the first two-way plug-in valve with oil feed line, another road is connected by Low-pressure load discharge loop with the return line of logical fuel tank, is finally connected all the way by check valve, low pressure accumulator, release control loop with oil feed line.The utility model is rational in infrastructure, dependable performance, and oil pump oil-out is connected with oil feed line, outlet line respectively by three tunnel loops, and it may be such that low pressure fuel pump is fully utilized, and then reduces the power consumption of motor, to realize energy-conservation；And more sufficient power can be provided for system, improve the responsiveness of each load hydraulic cylinder, and then improve operating efficiency and crudy.
Description
Technical field
The utility model is related to hydraulic machinery, especially relates to hydraulic press.
Background technology
Hydraulic press is a kind of using liquid as working media, is used to transmit energy to realize respectively according to what pascal's principle was made
Plant the machine of technique.Hydraulic press is typically made up of the machine (main frame), dynamical system and the part of hydraulic control system three；Hydraulic press is
One kind in hydraulic press, when existing energy-save oil press control system speed governing, pressure regulation, through frequently with method be to increase in systems
Proportional pressure valve and proportional flow control valve；Or the pressure regulation of adoption rate pressure valve and Frequency Converter Control motor speed governing speed, it is above-mentioned
Several method has reached the effect of energy-conservation to varying degrees, but there is also some shortcomings, such as has unnecessary oil in system
Liquid flows back to fuel tank, makes system architecture redundancy；The problem of action of frequency conversion system has slow, influences whether the beat of work；Work
System temperature is raised, it is necessary to add cooling device cooling etc., these all cause hydraulic press work tempo unstable, and can not reach
Good energy-saving effect.
Utility model content
The purpose of this utility model is the energy-efficient hydraulic press for developing a kind of large-tonnage, by improving existing hydraulic press
Control system, can realize good energy-saving effect on the premise of operating efficiency is ensured.
The utility model is realized by the following technical solutions：A kind of energy-efficient hydraulic press of large-tonnage, by underframe, gantry
Frame, hydraulic cylinder and the hydraulic system for actuating hydraulic cylinder are constituted, and hydraulic system includes：High-pressure oil pump, low pressure fuel pump, change
Frequency motor, wherein：High-pressure oil pump is connected through high pressure unloading loop with oil feed line；Three tunnels of low pressure fuel pump oil-out point, a-road-through
Cross the first two-way plug-in valve to be connected with oil feed line, another road is connected by Low-pressure load discharge loop with the return line of logical fuel tank,
Finally it is connected all the way by check valve, low pressure accumulator, release control loop with oil feed line.
Further, the high pressure unloading loop by the second two-way plug-in valve, the first pilot operated compound relief valve, the first two four
Three-way electromagnetic valve connection composition；The Low-pressure load discharge loop by the 3rd two-way plug-in valve, the second pilot operated compound relief valve, the second two four
Three-way electromagnetic valve connection composition；The release control loop is made up of the 4th two-way plug-in valve, the 3rd liang of position four-way solenoid valve connection.
Further, it is additionally provided with the 3rd pilot operated compound relief valve between the oil feed line and return line.
The utility model is rational in infrastructure, dependable performance, low pressure fuel pump oil-out by three tunnel loops respectively with oil feed line,
Outlet line is connected, and it may be such that low pressure fuel pump is fully utilized, and then reduces the power consumption of motor, to realize energy-conservation；This
Outside, by setting corresponding relief circuit and control loop, more sufficient power can be provided for system, makes each load hydraulic cylinder
Responsiveness is improved, and then improves operating efficiency and crudy.
Brief description of the drawings
Fig. 1 is the utility model structural representation；
Fig. 2 is the utility model hydraulic circuit system figure.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is described further to the utility model.
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain this
Utility model, is not used to limit the utility model.
The utility model discloses a kind of energy-efficient hydraulic press of large-tonnage, by underframe 1, portal frame 2, hydraulic cylinder 3 and use
The hydraulic system moved in actuating hydraulic cylinder 3 is constituted.Hydraulic system includes high-pressure oil pump 4, low pressure fuel pump 5, variable-frequency motor 6, its
In：High-pressure oil pump 4 is connected through high pressure unloading loop with oil feed line 17；Three tunnels of the oil-out point of low pressure fuel pump 5, pass through first all the way
Two-way plug-in valve 14 is connected with oil feed line 17, and another road is connected by Low-pressure load discharge loop with the return line 18 of logical fuel tank 8,
Finally it is connected all the way by check valve, low pressure accumulator 7, release control loop with oil feed line 17.
High pressure unloading loop is by the second two-way plug-in valve 21, the first pilot operated compound relief valve 20, first liang of position four-way solenoid valve
19 connection compositions；Low-pressure load discharge loop is by the 3rd two-way plug-in valve 13, the second pilot operated compound relief valve 12, the second two four-way electromagnetics
The connection composition of valve 11；Release control loop is made up of the 4th two-way plug-in valve 9, the 3rd liang of connection of position four-way solenoid valve 10.
From Figure of description, during utility model works, start motor 4, low pressure fuel pump 5 and high-pressure oil pump 4 start
Boost and common to the fuel feeding of oil feed line 17, and by oil feed line 17 and three position four-way electromagnetic valve 16 to hydraulic system fuel feeding,
When system pressure rises to the rated pressure of low pressure fuel pump 4, the first two-way plug-in valve 14 is closed, and low pressure fuel pump 5 is to low pressure accumulation of energy
The fuel feeding of device 7, accumulation of energy is carried out by low pressure accumulator 7, and high-pressure oil pump 4 then individually gives system fuel feeding；When low pressure accumulator 7 pressure with
When the rated pressure of low pressure fuel pump 5 reaches balance, low pressure fuel pump 5 passes through the off-load of Low-pressure load discharge loop；When needing to use accumulator 7
When, the 3rd liang of position four-way solenoid valve 10 is connected with fuel tank 8, the oil-out of the 4th two-way plug-in valve 9 is opened, low pressure accumulator 7
Connected with oil feed line 17.In addition, when the hydraulic cylinder loaded in system in place after, system delay power-off, 3-position 4-way electricity
Magnet valve 16 is closed, and pilot operated compound relief valve 15,12 is opened, whole hydraulic system off-load, when next action starts, is repeated above-mentioned
Cyclic process.
Because the hydraulic system is used for large-tonnage hydraulic press, for the security that guarantee system is absolute, high-pressure oil pump oil-out
High pressure unloading loop is also provided with, when the high pressure in system reaches certain threshold value, high pressure unloading loop plays a role, started high
Press off-load, its operation principle, it was found from Figure of description 2.
Above-described embodiment is preferred embodiment of the present utility model, is not the limit to technical solutions of the utility model
System, naturally it is also possible to design the long bolt of other quantity, as long as without creative work can above-described embodiment base
The technical scheme realized on plinth, is regarded as falling into the rights protection scope of the utility model patent.
Claims (5)
1. a kind of energy-efficient hydraulic press of large-tonnage, by underframe (1), portal frame (2), hydraulic cylinder (3) and for actuating hydraulic cylinder
(3) hydraulic system of motion is constituted, it is characterised in that the hydraulic system includes：High-pressure oil pump (4), low pressure fuel pump (5), change
Frequency motor (6), wherein：High-pressure oil pump (4) is connected through high pressure unloading loop with oil feed line (17)；Low pressure fuel pump (5) oil-out
Point three tunnels, are connected by the first two-way plug-in valve (14) with oil feed line (17) all the way, another road by Low-pressure load discharge loop and
Return line (18) connection of logical fuel tank (8), finally all the way by check valve, low pressure accumulator (7), release control loop with supplying
Oil pipe line (17) is connected.
2. a kind of energy-efficient hydraulic press of large-tonnage according to claim 1, it is characterised in that the high pressure unloading loop
It is made up of the second two-way plug-in valve (21), the first pilot operated compound relief valve (20), first liang of position four-way solenoid valve (19) connection.
3. a kind of energy-efficient hydraulic press of large-tonnage according to claim 1, it is characterised in that the Low-pressure load discharge loop
It is made up of the 3rd two-way plug-in valve (13), the second pilot operated compound relief valve (12), second liang of position four-way solenoid valve (11) connection.
4. a kind of energy-efficient hydraulic press of large-tonnage according to claim 1, it is characterised in that the release control loop
It is made up of the 4th two-way plug-in valve (9), the 3rd liang of position four-way solenoid valve (10) connection.
5. a kind of energy-efficient hydraulic press of large-tonnage according to claim 1, it is characterised in that the oil feed line (17)
The 3rd pilot operated compound relief valve (15) is additionally provided between return line (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621472643.7U CN206357693U (en) | 2016-12-30 | 2016-12-30 | A kind of energy-efficient hydraulic press of large-tonnage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621472643.7U CN206357693U (en) | 2016-12-30 | 2016-12-30 | A kind of energy-efficient hydraulic press of large-tonnage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206357693U true CN206357693U (en) | 2017-07-28 |
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ID=59378275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621472643.7U Active CN206357693U (en) | 2016-12-30 | 2016-12-30 | A kind of energy-efficient hydraulic press of large-tonnage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206357693U (en) |
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2016
- 2016-12-30 CN CN201621472643.7U patent/CN206357693U/en active Active
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