CN103967869B - A kind of hydraulic cylinder loads detection means - Google Patents
A kind of hydraulic cylinder loads detection means Download PDFInfo
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- CN103967869B CN103967869B CN201410195778.2A CN201410195778A CN103967869B CN 103967869 B CN103967869 B CN 103967869B CN 201410195778 A CN201410195778 A CN 201410195778A CN 103967869 B CN103967869 B CN 103967869B
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Abstract
The invention discloses a kind of hydraulic cylinder loading detection means, including the first oil pump, the second oil pump, pressurized cylinder, reversal valve, the first interface for being connected with first hydraulic cylinder, the second interface for being connected with second hydraulic cylinder, wherein：First chamber of the pressurized cylinder connects first oil pump to its fuel feeding by the reversal valve, while being also connected with the second interface to its fuel feeding；Second chamber of the pressurized cylinder connects the first interface, for the first interface fuel feeding；The second interface connects second oil pump to its fuel feeding.The exportable driving pressure oil higher than oil supply pressure of pressurized cylinder of the invention, is avoided that oil sources is in high-pressure work state, improves the oil sources life-span.Additionally, the present invention can also carry out energy regenerating and recycle, system installed power is reduced, system heat generation is few, can save cooling power.
Description
Technical field
The invention mainly relates to hydraulic cylinder Test And Check Technology field, specifically, it is related to a kind of hydraulic cylinder loading detection
Device.
Background technology
Hydraulic cylinder is the executive component of hydraulic system, is the crucial portion in engineering goods for driving various operating mechanisms
Part, its performance quality greatly affected the quality of whole machine.Verify that one of effective means of hydraulic cylinder performance is in special examination
Test on platform carries out loading detection by relevant standard.
According to standard GB/T/T15622-2005, most important project is to carry out 200,000 total travels to bear in type approval test
Experiment is carried, this means that a set of hydraulic system that can be worked under high pressure for a long time of needs, and need to consume a large amount of electric energy.Existing skill
The testing stand of art, generally using oil pump directly to tested hydraulic pressure oil supply cylinder, oil pump long-term work is in high pressure conditions, and fault rate is high,
And test pressure is still not high enough.
The power of tested hydraulic cylinder output is a very big reciprocal motional force, generally only with another hydraulic cylinder
Such energy, i.e. inversion can be received for after hydraulic energy, then heat energy is converted to overflow valve, not simply fail to recycle, can also
Oil temperature is raised, thus has to be equipped with larger cooling system.
Therefore, how a kind of hydraulic cylinder loading detection means is provided, loading pressure is improved on the premise of pressure fuel pump is limited
Power, and energy can be recycled, power consumption is saved, it is those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
In view of this, it is an object of the invention to provide a kind of hydraulic cylinder loading detection means, it is possible to resolve in the prior art
Operation of oil pump pressure is big, the defect that energy cannot be recycled, system heat generation is big or at least one.
Hydraulic cylinder of the invention loads detection means, including the first oil pump, the second oil pump, pressurized cylinder, reversal valve, for
First interface, the second interface for being connected with second hydraulic cylinder of first hydraulic cylinder connection, wherein：
First chamber of the pressurized cylinder connects first oil pump to its fuel feeding by the reversal valve, while being also connected with
To the second interface of its fuel feeding；
Second chamber of the pressurized cylinder connects the first interface, for the first interface fuel feeding；
The second interface connects second oil pump to its fuel feeding.
Further, the quantity of the pressurized cylinder is one, and the quantity of the first interface is one, the second interface
Quantity be one.
Further, the quantity of the pressurized cylinder is two, respectively the first pressurized cylinder and the second pressurized cylinder；
The quantity of the first interface is two, respectively A1 mouthfuls and B1 mouthfuls；
The quantity of the second interface is two, respectively A2 mouthfuls and B2 mouthfuls；
The connection of first chamber reversal valve and A2 mouthfuls of first pressurized cylinder, the second chamber connection A1 of first pressurized cylinder
Mouthful；
The connection of first chamber reversal valve and B2 mouthfuls of second pressurized cylinder, the second chamber connection B1 of second pressurized cylinder
Mouthful；
Second oil pump connects described A1 mouthfuls, B1 mouthfuls, A2 mouthfuls and B2 mouthfuls respectively.
Further, the device is also including in the first check valve, the second check valve, the 3rd check valve and the 4th check valve
It is one or several, wherein：
First check valve is connected between second oil pump and A1 mouthfuls, and its oil inlet connects second oil pump；
Second check valve is connected between second oil pump and B1 mouthfuls, and its oil inlet connects second oil pump；
3rd check valve is connected between second oil pump and A2 mouthfuls, and its oil inlet connects second oil pump；
4th check valve is connected between second oil pump and B2 mouthfuls, and its oil inlet connects second oil pump.
Further, the reversal valve is to include P mouthfuls, T mouthfuls, A mouthfuls and B mouthfuls of three-position four-way valve, the A mouthfuls of connection first
First chamber of pressurized cylinder, the first chamber of the second pressurized cylinder of the B mouthfuls of connection, the P mouthfuls of connection first oil pump is described T mouthfuls
Connection fuel tank.
Further, the first sequence valve is provided between described A2 mouthfuls and the first chamber of first pressurized cylinder, and/or,
The second sequence valve is provided between described B2 mouthfuls and the first chamber of second pressurized cylinder.
Further, the device also includes the 3rd sequence valve, the 5th check valve and the 6th check valve, the 5th check valve
Oil inlet connection it is described A2 mouthful, the oil inlet of the 6th check valve connects described B2 mouthfuls, the 5th check valve it is fuel-displaced
The oil-out of mouth and the 6th check valve connects to form the first oil circuit, and the oil inlet of the 3rd sequence valve is connected to first oil
Lu Shang, the oil-out of the 3rd sequence valve is connected on the oil-feed oil circuit of the reversal valve.
Further, the first electric proportional pressure control valve is provided between first oil pump and fuel tank, and/or, described second
The second electric proportional pressure control valve is provided between oil pump and fuel tank.
Further, the device also includes the position switch for detecting first hydraulic cylinder or second hydraulic cylinder stroke, institute
Position switch is stated to be connected by controller with the reversal valve.
Further, the first chamber of the pressurized cylinder is rodless cavity, and the second chamber of the pressurized cylinder is rod chamber.
Hydraulic cylinder of the invention loads detection means, can carry out load test to first hydraulic cylinder, also can be simultaneously to first
Hydraulic cylinder and second hydraulic cylinder carry out load test, and the first oil pump and second hydraulic cylinder can be supplied to the first chamber of pressurized cylinder simultaneously
Oil, the second chamber of pressurized cylinder is to first hydraulic cylinder fuel feeding.
It is because the pressurized cylinder can be pressurized to the pressure oil for entering first hydraulic cylinder thus exportable higher than oil supply pressure
Driving pressure oil, and then ensure loading detection experiment carrying out.The present invention can avoid oil sources from being in high-pressure work state, thus
The oil sources life-span can be improved.
The hydraulic oil of second hydraulic cylinder outflow of the present invention is flowed in the first chamber of pressurized cylinder, the hydraulic pressure of first hydraulic cylinder outflow
Oil is flowed in the second chamber of pressurized cylinder, thus energy be able to reclaim and recycle, power save mode science, effect is good, and system
Loss is small, and heating is few, it is possible to decrease system installed power, saving system cooling power, reduces fatigue loading operating cost.
Brief description of the drawings
The accompanying drawing for constituting a part of the invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate, for explaining the present invention, not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the hydraulic schematic diagram of the hydraulic cylinder loading detection means of first embodiment of the invention；
Fig. 2 is state diagram of the embodiment illustrated in fig. 1 when being detected；
Fig. 3 is state diagram of the hydraulic cylinder loading detection means of second embodiment of the invention when being detected.
Description of reference numerals：
The oil pump -12 of first oil pump -11 second
The pressurized cylinder -22 of first pressurized cylinder -21 second
The first hydraulic cylinder of reversal valve-3-41
The check valve -51 of second hydraulic cylinder -42 first
The check valve -53 of second check valve -52 the 3rd
The check valve -55 of 4th check valve -54 the 5th
The sequence valve -61 of 6th check valve -56 first
The sequence valve -63 of second sequence valve -62 the 3rd
The first electric electric proportional pressure control valve -72 of proportional pressure control valve -71 second
The frock of position switch-8-9
Specific embodiment
It should be noted that in the case where not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In the present invention, term " first ", " second ", " the 3rd ", " the 4th ", " the 5th ", " the 6th " are mainly used in distinguishing not
With part, but concrete restriction is not carried out to part.
It is the hydraulic schematic diagram of the hydraulic cylinder loading detection means of first embodiment of the invention shown in Fig. 1.The embodiment
Hydraulic cylinder loading device at least includes that the first oil pump 11, the second oil pump 12, pressurized cylinder, reversal valve 3, first interface and second connect
Mouthful, for carrying out loading detection experiment to hydraulic cylinder.
When being tested, it is necessary to by two hydraulic cylinders (first hydraulic cylinder 41 and second hydraulic cylinder respectively shown in Fig. 2
42) install on the apparatus.Wherein, first interface is used to be connected with first hydraulic cylinder 41, and second interface is used for and the second hydraulic pressure
Cylinder 42 is connected.The device can carry out load test to first hydraulic cylinder 41, also can be simultaneously to the hydraulic pressure of first hydraulic cylinder 41 and second
Cylinder 42 carries out load test, in order to detect its leakage situation, shock-absorbing capacity, weldquality etc..
Fig. 2 is state diagram of the embodiment illustrated in fig. 1 when being detected.After installation, first hydraulic cylinder 41 and second
The piston rod of hydraulic cylinder 42 is connected with each other, and preferably their axis overlaps.For the ease of installing, can also be by first hydraulic cylinder
41 and second hydraulic cylinder 42 be arranged in special frock 9.
It should be noted that hydraulic cylinder loading detection means of the invention both can be used for detecting one-way cylinder, also may be used
For detection two-way cylinder, the present invention is not limited to this.When one-way cylinder is detected, first interface and second interface
Quantity be respectively one；When two-way cylinder is detected, the quantity of first interface and second interface is respectively two.
First chamber of pressurized cylinder connects the first oil pump 11 to its fuel feeding by reversal valve 3, while being also connected with to its fuel feeding
Second interface；The second chamber connection first interface of pressurized cylinder, for first interface fuel feeding.First chamber oil-feed of pressurized cylinder
When, the hydraulic oil in second hydraulic cylinder 42 is flowed in the first chamber of pressurized cylinder after second interface, now the first oil pump 11 also to
Fuel feeding in first chamber.It is preferred that the first oil pump 11 is variable pump, the repairing amount in the chamber of pressurized cylinder first is can adjust, and then control first
The speed of service of hydraulic cylinder 41.
At the same time, the second chamber of pressurized cylinder is fuel-displaced to first interface, and eventually flows in first hydraulic cylinder 41.From first
The hydraulic oil that interface flows to first hydraulic cylinder 41 can apply hydraulic loaded power to first hydraulic cylinder 41, by the piston being connected with each other
Bar, the hydraulic loaded power can also be transferred to second hydraulic cylinder 42.
Foregoing second interface connects the second oil pump 12 to its fuel feeding, when second hydraulic cylinder 42 needs oil-feed, the second oil
Pump 12 is by second interface to the fuel feeding of second hydraulic cylinder 42.It should be clear that it is preferred that second oil pump 12 is also connected with first interface, and
And it is variable pump, the repairing amount of first hydraulic cylinder 41 is can adjust.Additionally, second oil pump 12 can also connect the second of pressurized cylinder
Chamber, for adjusting the second chamber repairing amount.
On the basis of preceding solution, the first oil pump 11 and second hydraulic cylinder 42 can simultaneously to the first chamber of pressurized cylinder
Fuel feeding, the second chamber of pressurized cylinder is to the fuel feeding of first hydraulic cylinder 41.Because the pressurized cylinder can be to the pressure into first hydraulic cylinder 41
Oil is pressurized, thus the exportable driving pressure oil higher than oil supply pressure, and then ensures the carrying out of loading detection experiment.The reality
Applying example can avoid oil sources (the first oil pump 11) in high-pressure work state, improve the oil sources life-span.
Additionally, the hydraulic oil of the outflow of second hydraulic cylinder 42 is flowed in the first chamber of pressurized cylinder, the outflow of first hydraulic cylinder 41
Hydraulic oil is flowed in the second chamber of pressurized cylinder, thus energy be able to reclaim and recycle, power save mode science, effect is good, and
System loss is small, and heating is few, it is possible to decrease system installed power, saving system cooling power, reduces fatigue loading operating cost.
Preferably, the first chamber of pressurized cylinder is rodless cavity, and the second chamber of pressurized cylinder is rod chamber, can be increased into the first liquid
The hydraulic fluid pressure of cylinder pressure 41, improves the overall loading performance of device.
It is foregoing it is stated that of the invention can carry out load test to one-way cylinder, correspondingly first interface and second connects
The quantity of mouth is respectively one.Additionally, the quantity of pressurized cylinder is also one (pressurized cylinder is two-way cylinder).First hydraulic cylinder
Had been described above before the fuel-displaced state of 41 oil-feeds, second hydraulic cylinder 42.When reversal valve 3 commutates, first hydraulic cylinder 41 is fuel-displaced,
The oil-feed of two hydraulic cylinder 42.Now, the second oil pump 12 is to the fuel feeding of second hydraulic cylinder 42, the hydraulic oil flow direction supercharging of first hydraulic cylinder 41
Second chamber of cylinder, while the second oil pump 12 preferably can also be to the second chamber repairing of pressurized cylinder, the hydraulic pressure in the chamber of pressurized cylinder first
Oil is by the oil return of reversal valve 3 to fuel tank.
In addition to one-way cylinder, the present invention is more preferably used in the load test of two-way cylinder, correspondingly pressurized cylinder
Quantity be two, the first pressurized cylinder 21 and the second pressurized cylinder 22 respectively shown in Fig. 1；The quantity of first interface is two,
Respectively A1 mouthfuls and B1 mouthfuls；The quantity of second interface is two, respectively A2 mouthfuls and B2 mouthfuls；First chamber of the first pressurized cylinder 21 connects
Reversal valve 3 and A2 mouthfuls are connect, the second chamber of the first pressurized cylinder 21 connects A1 mouthfuls；The first chamber connection reversal valve 3 of the second pressurized cylinder 22
With B2 mouthfuls, B1 mouthfuls of the second chamber connection of the second pressurized cylinder 22；Second oil pump 12 connects A1 mouthfuls, B1 mouthfuls, A2 mouthfuls and B2 mouthfuls respectively.
When being detected to first hydraulic cylinder 41 and second hydraulic cylinder 42, the preferably A1 mouthfuls of rodless cavity of connection first hydraulic cylinder 41, B1 mouthfuls
The rod chamber of connection first hydraulic cylinder 41, the A2 mouthfuls of rodless cavity of connection second hydraulic cylinder 42, B2 mouthfuls connects second hydraulic cylinder 42
Rod chamber.It should be clear that the present invention can also have other possible connected modes.
Second oil pump 12 be able to can lead to the first pressurized cylinder 21, the second chamber repairing of the second pressurized cylinder 22, the break-make of each oil circuit
Directional control valve (such as two-position two-way solenoid valve control) is crossed, to adapt to the retracted position of each hydraulic cylinder and pressurized cylinder.Preferably, exist
Check valve is set on each oil circuit, the break-make of each oil circuit, the hydraulic cylinder of first embodiment are controlled by hydraulic oil flow direction and oil pressure
Loading detection means is also including in the first check valve 51, the second check valve 52, the 3rd check valve 53 and the 4th check valve 54
It is individual or several, wherein：
First check valve 51 is connected between the second oil pump 12 and A1 mouthfuls, and its oil inlet connects the second oil pump 12；Second is single
It is connected between the second oil pump 12 and B1 mouthfuls to valve 52, its oil inlet connects the second oil pump 12；3rd check valve 53 is connected to
Between two oil pumps 12 and A2 mouthfuls, its oil inlet connects the second oil pump 12；4th check valve 54 is connected to the second oil pump 12 and B2 mouthfuls
Between, its oil inlet connects the second oil pump 12.
Reversal valve 3 can be various possible directional control valves or combination, preferably comprise P mouthfuls, T mouthfuls, A mouthfuls and B mouthfuls
Three-position four-way valve, A mouthfuls of the first chamber of the first pressurized cylinder 21 of connection, B mouthful the first chamber of the second pressurized cylinder 22 of connection, P mouthfuls connects the
One oil pump 11, T mouthfuls of connection fuel tank.It is highly preferred that the reversal valve 3 is Y type three-position four-way valves.In middle position, the first pressurized cylinder 21
The first chamber and the second pressurized cylinder 22 the first chamber simultaneously connected with fuel tank.
Second hydraulic cylinder 42 can be set various possibility by the first chamber fuel feeding of the second interface to pressurized cylinder on the oil circuit
Directional control valve and pressure-control valve, to carry out the control of hydraulic oil flow direction and pressure.Preferably, A2 mouthfuls and the first pressurized cylinder
The first sequence valve 61 is provided between 21 the first chamber, and/or, is provided between B2 mouthfuls and the first chamber of the second pressurized cylinder 22
Two sequence valves 62.
When A2 mouthfuls of oil pressure reaches the Opening pressure of the first sequence valve 61, first sequence valve 61 is opened, hydraulic oil stream
To the first chamber of the first pressurized cylinder 21.The operation principle of the second sequence valve 62 is identical with the first sequence valve 61.First sequence valve 61
Electric ratio sequence valve is preferably with the second sequence valve 62, and then different test hydraulic cylinder adjustment on-load pressures can be directed to.
It should be clear that the sequence valve 62 of the first sequence valve 61 and second can by other various possible valves or combination replacement,
As substituted by a choke valve respectively, can equally realize the present invention from second hydraulic cylinder to the technique effect of supercharging oil supply cylinder.
For preferably for first embodiment, the first electricity ratio is also provided between the first oil pump 11 and fuel tank
Example overflow valve 71, the first electric proportional pressure control valve 71 can adjust the oil pressure that of the first oil pump 11, and can play safety overflow work
With.Additionally, the second electric proportional pressure control valve 72 is also provided between the second oil pump 12 and fuel tank, the second electric proportional overflow
The oil compensation pressure of adjustable second oil pump 12 of valve 72.
Further, the hydraulic cylinder loading detection means of first embodiment is also included for detecting first hydraulic cylinder 41 or the
The position switch 8 of the stroke of two hydraulic cylinder 42, position switch 8 is connected with reversal valve 3 by controller.The position switch 8 can be
Travel switch, is preferably close to switch, and be provided with two.
For mounting structure and orientation shown in Fig. 2, opened when first hydraulic cylinder 41 extend out to approaching on the right of triggering
Guan Shi, shows that it has stretched out in place, and proximity switch changes on off state, and controller is changed according on off state control reversal valve 3
To；When first hydraulic cylinder 41 extend out to triggering the left side proximity switch when, show that it has been retracted to position, similarly controller meeting and
When control reversal valve 3 commutate.
With reference to Fig. 2, the specific work process to the hydraulic cylinder loading detection means of first embodiment is described as follows：
When reversal valve 3 is operated in left position, the pressure oil of the first oil pump 11 enters the nothing of the first pressurized cylinder 21 through reversal valve 3
Rod cavity, while the rodless cavity of second hydraulic cylinder 42 is fuel-displaced through the first sequence valve 61, it is common to drive the first pressurized cylinder 21 to stretch out；First increases
The rod chamber pressure oil of cylinder pressure 21 drives it to stretch out into the rodless cavity of first hydraulic cylinder 41；The rod chamber oil return of first hydraulic cylinder 41, enters
Enter the rod chamber of the second pressurized cylinder 22, the second oil pump 12 is common to drive the second pressurized cylinder 22 to the rod chamber repairing of the second pressurized cylinder 22
Retract；The hydraulic oil of the rodless cavity of the second pressurized cylinder 22 is through the oil return box of reversal valve 3；Second oil pump 12 gives the rod chamber of second hydraulic cylinder 42
Repairing.
When reversal valve 3 is operated in right position, foregoing first pressurized cylinder 21, the second pressurized cylinder 22, first hydraulic cylinder 41, second
The state of the rod chamber of hydraulic cylinder 42 and rodless cavity replaces, and will not be repeated here.The left and right position switching repeated by reversal valve 3, can
Realize the fatigue loading of hydraulic cylinder.
It is state diagram of the hydraulic cylinder loading detection means of second embodiment of the invention when being detected shown in Fig. 3.With
First embodiment is identical, and second embodiment also includes the first oil pump 11, the second oil pump 12, the first pressurized cylinder 21, the second pressurized cylinder
22nd, reversal valve 3, first interface, second interface, the first check valve 51, the second check valve 52, the 3rd check valve the 53, the 4th are unidirectional
The structures such as valve 54.Unlike, it is two in the quantity of the sequence valve of first embodiment, and sequence valve in a second embodiment
Quantity is only one, i.e., the 3rd sequence valve 63 shown in Fig. 3.
Additionally, second embodiment also include the 5th check valve 55 and the 6th check valve 56, with foregoing 3rd check valve 53 and
The composition hydraulic full-bridge of 4th check valve 54 loop.Specifically, wherein the oil inlet of the 5th check valve 55 connects A2 mouthfuls, the 6th is unidirectional
The oil inlet of valve 56 connects B2 mouthfuls, and the oil-out of the 5th check valve 55 and the oil-out of the 6th check valve 56 connect to form the first oil
Road, the oil inlet of the 3rd sequence valve 63 is connected on the first oil circuit, and the oil-out of the 3rd sequence valve 63 is connected to entering for reversal valve 3
On oil circuit.
When second hydraulic cylinder 42 is retracted, the hydraulic oil of its rodless cavity is successively through A2 mouthfuls, the order of the 5th check valve the 55, the 3rd
Enter after valve 63, reversal valve 3 in first chamber of the first pressurized cylinder 21；When second hydraulic cylinder 42 is stretched out, the hydraulic pressure of its rod chamber
Oil enters in the first chamber of the second pressurized cylinder 22 after B2 mouthfuls, the 6th check valve 56, the 3rd sequence valve 63, reversal valve 3 successively.
On the basis of above-mentioned technical proposal, a sequence valve can be saved, and can equally realize technique effect of the invention.
The specific work process of second embodiment other parts is essentially identical with first embodiment, is stated before specifically referring to
It is bright, repeat no more herein.
In sum, first embodiment of the invention and second embodiment, can be to first hydraulic cylinders 41 by setting pressurized cylinder
Output is oily higher than the driving pressure of oil supply pressure, thus is avoided that oil sources is in high-pressure work state, improves the oil sources life-span；This
Outward, previous embodiment forms hydraulic oil recovery oil circuit also between each pressurized cylinder and hydraulic cylinder so that energy it is recyclable with follow
Ring is utilized, and power save mode science, system loss is small, and heating is few, it is possible to decrease the first oil pump repairing amount so that reduce installed power and
Saving system cooling power, reduces fatigue loading operating cost.
Therefore, the solution have the advantages that significantly.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (8)
1. a kind of hydraulic cylinder loading detection means, it is characterised in that including the first oil pump (11), the second oil pump (12), pressurized cylinder,
Reversal valve (3), for be connected with first hydraulic cylinder (41) first interface, for being connected with second hydraulic cylinder (42) second connect
Mouthful, wherein：
First chamber of the pressurized cylinder connects first oil pump (11) to its fuel feeding by the reversal valve (3), while also
Connect the second interface to its fuel feeding；
Second chamber of the pressurized cylinder connects the first interface, for the first interface fuel feeding；
The second interface connects second oil pump (12) to its fuel feeding；
The quantity of the pressurized cylinder is two, respectively the first pressurized cylinder (21) and the second pressurized cylinder (22)；
The quantity of the first interface is two, respectively A1 mouthfuls and B1 mouthfuls；
The quantity of the second interface is two, respectively A2 mouthfuls and B2 mouthfuls；
First chamber of first pressurized cylinder (21) connects reversal valve (3) and A2 mouthfuls, the second chamber of first pressurized cylinder (21)
A1 mouthfuls of connection；
First chamber of second pressurized cylinder (22) connects reversal valve (3) and B2 mouthfuls, the second chamber of second pressurized cylinder (22)
B1 mouthfuls of connection；
Second oil pump (12) connects described A1 mouthfuls, B1 mouthfuls, A2 mouthfuls and B2 mouthfuls respectively.
2. hydraulic cylinder according to claim 1 loading detection means, it is characterised in that also including the first check valve (51),
It is one or several in second check valve (52), the 3rd check valve (53) and the 4th check valve (54), wherein：
First check valve (51) is connected between second oil pump (12) and A1 mouthfuls, its oil inlet connection second oil
Pump (12)；
Second check valve (52) is connected between second oil pump (12) and B1 mouthfuls, its oil inlet connection second oil
Pump (12)；
3rd check valve (53) is connected between second oil pump (12) and A2 mouthfuls, its oil inlet connection second oil
Pump (12)；
4th check valve (54) is connected between second oil pump (12) and B2 mouthfuls, its oil inlet connection second oil
Pump (12).
3. hydraulic cylinder according to claim 1 loads detection means, it is characterised in that the reversal valve (3) is to include P
Mouthful, T mouthful, the three-position four-way valve of A mouthful and B mouthfuls, described A mouthfuls the first chamber for connecting the first pressurized cylinder (21), described B mouthfuls connects second
First chamber of pressurized cylinder (22), the P mouthfuls of connection first oil pump (11), the T mouthfuls of connection fuel tank.
4. hydraulic cylinder according to claim 1 loads detection means, it is characterised in that described A2 mouthfuls and the described first supercharging
The first sequence valve (61) is provided between first chamber of cylinder (21), and/or, the of described B2 mouthfuls and second pressurized cylinder (22)
The second sequence valve (62) is provided between one chamber.
5. hydraulic cylinder according to claim 1 loading detection means, it is characterised in that also including the 3rd sequence valve (63),
5th check valve (55) and the 6th check valve (56), the oil inlet connection of the 5th check valve (55) are described A2 mouthfuls, and described the
The oil inlet connection of six check valves (56) is described B2 mouthfuls, the oil-out of the 5th check valve (55) and the 6th check valve (56)
Oil-out is connected to form the first oil circuit, and the oil inlet of the 3rd sequence valve (63) is connected on first oil circuit, and described
The oil-out of three sequence valves (63) is connected on the oil-feed oil circuit of the reversal valve (3).
6. the hydraulic cylinder according to claim any one of 1-5 loads detection means, it is characterised in that first oil pump
(11) the first electric proportional pressure control valve (71) is provided with and fuel tank between, and/or, second oil pump (12) is set and fuel tank between
There is the second electric proportional pressure control valve (72).
7. the hydraulic cylinder according to claim any one of 1-5 loads detection means, it is characterised in that also including for detecting
The position switch (8) of first hydraulic cylinder (41) or second hydraulic cylinder (42) stroke, the position switch (8) and the reversal valve
(3) connected by controller.
8. the hydraulic cylinder loading detection means according to claim any one of 1-5, it is characterised in that the of the pressurized cylinder
One chamber is rodless cavity, and the second chamber of the pressurized cylinder is rod chamber.
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| CN201410195778.2A CN103967869B (en) | 2014-05-12 | 2014-05-12 | A kind of hydraulic cylinder loads detection means |
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| CN201410195778.2A CN103967869B (en) | 2014-05-12 | 2014-05-12 | A kind of hydraulic cylinder loads detection means |
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| CN104251782A (en) * | 2014-09-16 | 2014-12-31 | 南车青岛四方机车车辆股份有限公司 | Train pressure boosting cylinder test tooling and test method |
| CN107023533B (en) * | 2017-06-22 | 2018-03-16 | 合肥工业大学 | A kind of hydraulic control system for resilient bearing multidimensional rigidity test |
| CN109386515B (en) * | 2018-12-06 | 2024-03-19 | 哈工新欧(岳阳)测控装备有限公司 | Energy-saving large-sized hydraulic cylinder test bed |
| CN110030218A (en) * | 2019-05-15 | 2019-07-19 | 广州计量检测技术研究院 | Pump hydraulic loading system and its application method |
| CN110762072B (en) * | 2019-11-05 | 2022-02-15 | 徐州徐工矿业机械有限公司 | Hydraulic system and method for realizing sequential action of engineering vehicle mechanism and engineering vehicle |
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| CN103410810A (en) * | 2013-08-13 | 2013-11-27 | 湖南特力液压有限公司 | Test equipment for testing durability of sealing element of hydraulic cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103644151B (en) * | 2013-12-05 | 2016-03-02 | 燕山大学 | The test bed hydraulic control system of energy-conservation low impact hydraulic cylinder |
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| DE19517305C1 (en) * | 1995-05-02 | 1996-09-26 | Schmidt & Co Gmbh Kranz | Dynamic pulse testing device for fluid circuit component |
| EP1020648A1 (en) * | 1998-07-15 | 2000-07-19 | Shin Caterpillar Mitsubishi Ltd. | Method and device for controlling work machine |
| CN201757101U (en) * | 2010-08-02 | 2011-03-09 | 湖南协力液压有限公司 | Hydraulic cylinder factory test bed |
| CN102705302A (en) * | 2012-05-11 | 2012-10-03 | 浙江大学 | Dynamic testing system for high-pressure large-flow oil cylinder |
| CN103410810A (en) * | 2013-08-13 | 2013-11-27 | 湖南特力液压有限公司 | Test equipment for testing durability of sealing element of hydraulic cylinder |
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| CN103967869A (en) | 2014-08-06 |
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Effective date of registration: 20191204 Address after: 417004 No.11, Xinping street, industrial park, Loudi Economic Development Zone, Hunan Province Patentee after: Loudi Zhongxing Hydraulic Fittings Co., Ltd. Address before: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Patentee before: SANY Automobile Manufacturing Co., Ltd. |
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