CN205587589U - Pump control hydraulic system of hydraulic press - Google Patents
Pump control hydraulic system of hydraulic press Download PDFInfo
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- CN205587589U CN205587589U CN201620409683.0U CN201620409683U CN205587589U CN 205587589 U CN205587589 U CN 205587589U CN 201620409683 U CN201620409683 U CN 201620409683U CN 205587589 U CN205587589 U CN 205587589U
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- axial plunger
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Abstract
The utility model provides a pump control hydraulic system of hydraulic press, the valve accuse hydraulic system consumption of having overcome current hydraulic press is high, energy utilization is rateed lowly, shock and vibration is strong, the problem that the fault rate is high and production efficiency is low, the characteristic is that the solution feed pump passes through first check valve and main working cylinder and links to each other, the solution feed pump passes through the second check valve and links to each other with two -way variable axial plunger pump, and through two -way variable axial plunger pump direct control main working cylinder and the action of the motor -driven roof beam of return cylinder drive hydraulic pressure, still install pump stroke reversal diverter valve and return stroke energy storage ware between two -way variable axial plunger pump and the return cylinder, line type aliphatic epoxide, the system control precision is high, system response speed is fast, the motor -driven roof beam of two -way variable axial plunger pump lug connection main working cylinder drive hydraulic pressure pressurization whereabouts does not have extra power loss, and main working cylinder pressure release loading shielding in -process pump convert into motor absorptions need to discharge the pressure potential that falls can, eliminated the shock and vibration of system when the energy is fully recycled by the recovery, system's work steadily, safe and reliable.
Description
Technical field
This utility model belongs to technical field of hydraulic, particularly to the pump control hydraulic system of a kind of hydraulic press.
Background technology
The hydraulic system of hydraulic press of the prior art is valve control system, as the utility model of Application No. 200820222400.7 discloses one " energy-conservation rapid forge unit ", this unit is also a kind of hydraulic press, moves beam including backhaul hydraulic spring grease cup, rapid forge valve, press, forges master cylinder, pressure detector, high pressure main pump, stroke detector, frequency conversion solution feed pump soon；Kicker cylinder and press move beam and are directly connected to, and make press move beam backhaul and support press and move beam；Frequency conversion solution feed pump is connected with high pressure main pump by pipeline, flange and check valve；High pressure main pump is connected with fast forging master cylinder by pipeline, flange；Fast forging master cylinder is connected with rapid forge valve by pipeline, flange；Stroke detector is connected to press and moves on beam.This utility model can realize forging soon, decreases impact shock.But, this utility model is still that and realizes the control to hydraulic press by rapid forge valve, falls within valve control system, and the main weak point that valve control system exists shows the following aspects: one is that system power dissipation is high, and energy utilization rate is low.First, valve control system pumping hole hydraulic oil discharge capacity or pressure when hydraulic press works is non-adjustable, and therefore when hydraulic press work interval, substantial amounts of hydraulic oil is converted into heat-energy losses by overflow；Secondly, valve control system is expelled back into fuel tank the huge compression energy of savings in hydraulic press Main cylinder and pressure piping by release load releasing valve after hydraulic press end-of-job, the compression energy of the most all savings is converted into heat and makes hydraulic oil heating up and discharge the impact shock of pipeline, all generates harmful idle work；3rd, in valve control system, the speed of the rise and fall of hydraulic motor beam leans on the size of the opening degree of hydraulic valve to control completely, pressure oil is from high to low by restriction, and part energy is converted into the heat energy of hydraulic oil, had both wasted the energy and has also made system heat generation, oil temperature raises, system increases the heat energy of how much power, the power of system to be increased cooling, and consuming the energy increases system cost.Two is that system shock vibration is strong: at the parts such as pipeline being attached thereto by hydraulic shock by the energy of the release load releasing valve high pressure energy of release, valve block etc., making the life-span of various parts be greatly lowered, fault rate improves therewith, and production efficiency is greatly lowered；Although above-mentioned utility model decreases impact shock, but system shock vibration is not completely eliminated.
Summary of the invention
Technical problem to be solved in the utility model is, in place of overcoming the deficiencies in the prior art, ensureing hydraulic system structure compact and reasonable, controlling flexibly, be easy under maintenance and service-strong premise, it is provided that the work frequency of hydraulic press can accelerated, improve workpiece accuracy, eliminate system vibration impact, improve the pump control hydraulic system of a kind of hydraulic press of production efficiency and the saving energy.
The technical solution adopted in the utility model includes hydraulic press, kicker cylinder, Main cylinder, the first check valve, the second check valve, tapping valve and solution feed pump, described solution feed pump is connected with Main cylinder by the first check valve, described solution feed pump is connected with bidirectional variable axial plunger pump by the second check valve, and directly controls Main cylinder and kicker cylinder driving hydraulic motor beam action by bidirectional variable axial plunger pump.
Pump stroke reversal switching valve and backhaul accumulator it is also equipped with between described bidirectional variable axial plunger pump and kicker cylinder.
Described hydraulic press is forging press.
Compared with prior art, the beneficial effects of the utility model are:
(1) pump control system is shorter relative to the working time of valve in the course of the work, and system response time faster, easily realizes rapid forge.In this utility model, the control accuracy of bidirectional variable axial plunger POF is high, fast response time.The switching time of the output flow+100% to-100% of the bidirectional variable axial plunger pump that prior art produces, between 40～200 milliseconds, is fully able to meet the working cycle requirement of fast hydraulic press.This utility model can also be by kicker cylinder, backhaul accumulator realizes the rapid forge function of hydraulic press, after backhaul accumulator accesses kicker cylinder, master cylinder acts simultaneously on the liquid spring of backhaul accumulator when pressurizeing workpiece, when the dynamic beam of hydraulic press reaches predeterminated position, bidirectional variable axial plunger pump is pressure release by quickly commutation of pressurizeing, main in-cylinder pressure reduces rapidly, the liquid spring of the backhaul accumulator of big rigidity makes the dynamic beam of hydraulic press rise rapidly the fast forging of realization, flow accuracy and response speed due to pump, ensure that the dimensional accuracy of workpiece and the rapidity of forging.
(2) obvious energy conservation, conventional valve Ore-controlling Role belongs to throttling control, and efficiency is about 30%；This utility model belongs to volumetric void fraction, can need to provide energy according to forging, and efficiency is up to 60%～70%, and pump control hydraulic system belongs to enclosed volumetric void fraction, more in hgher efficiency.Owing to pump control system can adjust the discharge capacity of pumping hole hydraulic oil, therefore without spill losses at any time according to the forging of various different operating modes or pressing speed needs.The A mouth of bidirectional variable axial plunger pump is directly connected to Main cylinder without intermediate link, the dynamic beam pressurization directly driving hydraulic press is fallen, system only controls bidirectional variable axial plunger pump discharge can control pressing speed, system pressure depends on the resistance of deformation of workpiece, pressure produced by different workpieces is all different, system power dissipation=flow × pressure, so system output power is i.e. the work rate needed for workpiece, excess power is not had to lose, so energy-saving effect is notable.
(3) this utility model directly controls Main cylinder owing to have employed bidirectional variable axial plunger pump, in hydraulic press return stroke, bidirectional variable axial plunger pump switches to motor to absorb part needs the pressure potential drive motor of release to rotate, make to drive motor to enter zero load or minimal amount power output state, so can be considered that native system has reclaimed the energy that quite a few valve control system is to be emitted, the energy improving system the most further uses and recycles efficiency, reaches the energy-saving effect of higher order；Recycling eliminates the impact shock of system while discarding the energy, system stable working is safe and reliable.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model system.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is elaborated.
As it is shown in figure 1, the technical solution adopted in the utility model includes hydraulic press 10, hydraulic press 10 is provided with Main cylinder 8 and kicker cylinder 9, between Main cylinder 8 and kicker cylinder 9, is provided with bidirectional variable axial plunger pump 5 and backhaul accumulator 7 and pump stroke reversal switching valve 6；Tapping valve 2 is connected with Main cylinder 8, solution feed pump 1 is connected with Main cylinder 8 by the first check valve 3, solution feed pump 1 is connected with bidirectional variable axial plunger pump 5 by the second check valve 4, wherein, solution feed pump 1 for providing low-pressure hydraulic oil for bidirectional variable axial plunger pump 5 and Main cylinder 8, the first check valve 3 and the second check valve 4 be used for controlling hydraulic oil flow to prevent hydraulic oil from refluxing.
Described hydraulic press 10 is forging press.
During work, described hydraulic press 10 mainly has unloaded decline, pressurization, backhaul, quit work 4 actions, the realization of 4 actions is that bidirectional variable axial plunger pump 5 directly drives the Main cylinder 8 of hydraulic press 10 to complete with kicker cylinder 9, when the unloaded decline of hydraulic press 10, pump stroke reversal switching 6 backhaul accumulators 7 of valve are kept apart, and make the B mouth of bidirectional variable axial plunger pump 5 directly be connected with kicker cylinder 9；The A mouth fuel-displaced feeding Main cylinder 8 of bidirectional variable axial plunger pump 5, B mouth is from kicker cylinder 9 oil suction, the dynamic beam rapid decrease of hydraulic press 10；When the dynamic beam of hydraulic press 10 contacts workpiece, in Main cylinder 8, pressure rises, bidirectional variable axial plunger pump 5 pressurization starts to drive Main cylinder 8 to depress workpiece, after reaching the size needed, bidirectional variable axial plunger pump 5 commutates A mouth oil suction, B mouth fuel-displaced driving kicker cylinder 9, when the pressure of Main cylinder 8 is less than the driving force of kicker cylinder 9, the dynamic beam backhaul of hydraulic press 10；Now the unnecessary fluid in Main cylinder 8 flows back to fuel tank by tapping valve, bidirectional variable axial plunger pump 5 zero output when backhaul to precalculated position, and the dynamic beam of hydraulic press 10 stops.One forging and stamping circulation completes.
The dynamic beam rising of hydraulic press 10 is divided into pump stroke reversal and 2 kinds of modes of Accumulator return, controlled by pump stroke reversal switching valve 6, this backhaul switching valve 6 controls kicker cylinder 9 and connect still kicker cylinder 9 with the B mouth of main pump 5 and connect with backhaul accumulator 7, use backhaul accumulator 7 backhaul under fast forging die formula.
Claims (3)
1. the pump control hydraulic system of a hydraulic press, including hydraulic press (10), kicker cylinder (9), Main cylinder (8), first check valve (3), second check valve (4), tapping valve (2) and solution feed pump (1), it is characterized in that, described solution feed pump (1) is connected with Main cylinder (8) by the first check valve (3), described solution feed pump (1) is connected with bidirectional variable axial plunger pump (5) by the second check valve (4), and directly control Main cylinder (8) and the dynamic beam action of kicker cylinder (9) driving hydraulic press (10) by bidirectional variable axial plunger pump (5).
A kind of pump control hydraulic system of hydraulic press, it is characterized in that, between described bidirectional variable axial plunger pump (5) and kicker cylinder (9), be also equipped with pump stroke reversal switching valve (6) and backhaul accumulator (7).
The pump control hydraulic system of a kind of hydraulic press the most according to claim 1 or claim 2, it is characterised in that described hydraulic press (10) is forging press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620409683.0U CN205587589U (en) | 2016-05-09 | 2016-05-09 | Pump control hydraulic system of hydraulic press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620409683.0U CN205587589U (en) | 2016-05-09 | 2016-05-09 | Pump control hydraulic system of hydraulic press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205587589U true CN205587589U (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620409683.0U Active CN205587589U (en) | 2016-05-09 | 2016-05-09 | Pump control hydraulic system of hydraulic press |
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| CN (1) | CN205587589U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903920A (en) * | 2017-04-07 | 2017-06-30 | 江苏中海重型机床有限公司 | A kind of bender with buffer protection function |
| CN109093044A (en) * | 2018-07-19 | 2018-12-28 | 天津市天锻压力机有限公司 | A kind of hydraulic press fluid infusion of frequency control and cooling control system |
| CN111237262A (en) * | 2018-12-26 | 2020-06-05 | 金马工业集团股份有限公司 | Hydraulic system |
-
2016
- 2016-05-09 CN CN201620409683.0U patent/CN205587589U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903920A (en) * | 2017-04-07 | 2017-06-30 | 江苏中海重型机床有限公司 | A kind of bender with buffer protection function |
| CN109093044A (en) * | 2018-07-19 | 2018-12-28 | 天津市天锻压力机有限公司 | A kind of hydraulic press fluid infusion of frequency control and cooling control system |
| CN109093044B (en) * | 2018-07-19 | 2020-11-17 | 天津市天锻压力机有限公司 | Variable-frequency control hydraulic press liquid supplementing and cooling control system |
| CN111237262A (en) * | 2018-12-26 | 2020-06-05 | 金马工业集团股份有限公司 | Hydraulic system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |