CN104847738B - Parallel energy-saving technology based high-frequency single-acting hydraulic cylinder durability test device and method - Google Patents
Parallel energy-saving technology based high-frequency single-acting hydraulic cylinder durability test device and method Download PDFInfo
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- CN104847738B CN104847738B CN201510297904.XA CN201510297904A CN104847738B CN 104847738 B CN104847738 B CN 104847738B CN 201510297904 A CN201510297904 A CN 201510297904A CN 104847738 B CN104847738 B CN 104847738B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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Abstract
The invention discloses a parallel energy-saving technology based high-frequency single-acting hydraulic cylinder durability test device and method. The device comprises a motor, a hydraulic pump, a two-bit four-way proportional reversing valve, a proportional overflow valve, an accumulator module, six tested high-frequency single-acting hydraulic cylinders, a throttle valve and various devices for testing pressure, flow, displacement and the like. During test, a test system capable of testing multiple hydraulic cylinders simultaneously is provided through the parallel energy-saving technology, the two-bit four-way proportional reversing valve performs high-frequency reciprocating motion durability test (the highest frequency reciprocating movement can reach up to 30Hz) on the hydraulic cylinders through high-frequency reversing, and durability performance parameters of the hydraulic cylinders are subjected to automatic acquisition and analytical calculation during the test. Durability test is performed on at least six high-frequency single-acting hydraulic cylinders can be realized through the test device, time for testing is saved, energy sources are saved, the test device is simplified, and cost for testing is lowered.
Description
Technical field
The present invention relates to a kind of hydraulic cylinder durability assay device, more particularly, to a kind of high frequency based on parallel power-saving technology
Single-action hydraulic cylinder durability test device and method.
Background technology
Hydraulic cylinder be hydraulic energy is changed into mechanical energy, the hydraulic pressure that does straight reciprocating motion (or oscillating motion) executes unit
Part, is substantially made up of cylinder barrel and cylinder cap, piston and piston rod, sealing device, buffer unit and exhaust apparatus.Its structure letter
Single, reliable operation.When being realized with it moving back and forth, deceleration device can be removed from, and there is no drive gap, stable movement, because
This is used widely in the hydraulic system of various machineries., as the critical elements of Hydraulic Power Transmission System, it is durable for hydraulic cylinder
Property level directly influence durability and the safety of whole hydraulic system, for guaranteeing that hydraulic cylinder normally runs and find that it is weak
Link, needs to carry out endurancing.The machinery industry standard gb/ of the universal reference in domestic hydraulic cylinder durability test loop at present
The test loop of t15622-2005, this kind of scheme can only be tested it is impossible to be met high frequency direction changing ratio hydraulic pressure for Normal hydraulic cylinder
The test requirements document of cylinder, single test sample size simultaneously is few, time-consuming, high cost.
Content of the invention
The technical problem to be solved is to provide one kind to be specifically designed for high frequency for above-mentioned state of the art
Single-action hydraulic cylinder carries out the assay device of high-frequent reciprocating exercise endurance test, and makes this examination by parallel power-saving technology
Experiment device can test the endurancing of multiple hydraulic cylinders simultaneously, saves test period, simplify assay device, reduce simultaneously
Experimentation cost.
The technical scheme that present invention solution above-mentioned technical problem is adopted is: a kind of high frequency list based on parallel power-saving technology
Acting cylinder durability test device it is characterised in that: include by motor drive rotate hydraulic pump, hydraulic pump in-line lead to
Cross stop valve and connect fuel tank, vent line connects check valve, check valve rear oil duct is divided into two branch roads, and a branch road returns through proportional pressure control valve
Fuel tank, another branch road connects force feed filter；Force feed filter other end oil circuit is divided into two branch roads, and a branch road connects accumulator mould
The oil-feed interface of block, the draining road of energy storage module connects fuel tank, and another branch road connects the p mouth of two four-way proportional reversing valves；
The t mouth hydraulic circuit of two four-way proportional reversing valves connects fuel tank, a mouth multiple inspections simultaneously in parallel of two four-way proportional reversing valves
Survey unit, b mouth parallel connection simultaneously in addition multiple detector units of two four-way proportional reversing valves；Each detector unit includes ending
Valve, tested high frequency single-action hydraulic cylinder, graduated cylinder, displacement transducer, pressure sensor and spring charging device, from two four-ways
The a mouth of proportional reversing valve and the hydraulic circuit of b mouth extraction, respectively through stop valve multiple tested high frequency single-action hydraulic cylinders in parallel
Oil inlet and outlet, the drain tap of tested high frequency single-action hydraulic cylinder connects graduated cylinder, described pressure sensor after pipeline extraction
One end connects the hydraulic rod end of tested high frequency single-action hydraulic cylinder, and other end connecting spring charger, to detect hydraulic pressure
Bar power output is over time；Displacement transducer is arranged on hydraulic stem to detect hydraulic stem displacement over time；Have
One first pressure sensor is arranged on proportional pressure control valve in-line with detecting system pressure；A second pressure sensor is had to install
At a mouth of two four-way proportional reversing valves, the pressure in order to detect tested high frequency single-action hydraulic cylinder in parallel with a mouth becomes
Change；One the 3rd pressure transducer is had to be arranged at the b mouth of two four-way proportional reversing valves, in parallel with b mouth tested in order to detect
The pressure change of high frequency single-action hydraulic cylinder.
Above-mentioned fuel tank internal is provided with the heater to fluid heating, and in order to detect the temperature sensing of oil liquid temperature
Device；The t mouth hydraulic circuit of two four-way proportional reversing valves connects fuel tank successively after choke valve, radiator.Choke valve is arranged on
On system oil return road, provide backhaul back pressure for tested high frequency single-action hydraulic cylinder, so that tested high frequency single-action hydraulic cylinder is put down
Steady motion；Radiator and heater devices, make system oil temperature remain stable.
The a mouth of above-mentioned two four-way proportional reversing valves simultaneously and ter detector unit, the respectively first detector unit, the
Two detector units, the 3rd detector unit；The b mouth of two four-way proportional reversing valves simultaneously and ter detector unit, respectively the
Four detector units, the 5th detector unit, the 6th detector unit.A mouth and b mouth be each and ter detector unit, its work efficiency and
Testing precision reaches one and preferably merges.
Above-mentioned pressure sensor is cylindrical shape.
A kind of using as afore-mentioned test device test method it is characterised in that: comprise the following steps:
Step one: operational mode, in order to detect the life consumption of tested high frequency single-action hydraulic cylinder；
It is hydraulic cylinder rated operating pressure that proportional pressure control valve is set up system pressure, and two four-way proportional reversing valves are set as
Altofrequency commutation needed for endurancing, adjusting choke valve makes system reach required back pressure, starts motor, motor belt motor hydrodynamic
Press pump works, and assay device brings into operation, and makes hydraulic cylinder move back and forth certain number of times；
Step 2: test pattern, detection high frequency single-action hydraulic cylinder is during endurancing in test mode
Lowest starting pressure, internal leakage, load efficiency curve, piston displacement response curve in time；
After tested high frequency single-action hydraulic cylinder reciprocates to certain number of times, durability test device automatically switches
To test pattern, the specified commutation that now commutating frequency of two four-way proportional reversing valves automatically switches to hydraulic cylinder by system is frequently
Rate, proportional pressure control valve set pressure is still hydraulic cylinder rated operating pressure, the corresponding hydraulic cylinder piston displacement of displacement transducer collection
Response curve in time, the internal leakage of the corresponding hydraulic cylinder of graduated cylinder collection；
After through certain time, information gathering terminates, the commutating frequency of proportional reversing valve is automatically switched 0.01hz by system,
The set pressure of proportional pressure control valve was slowly uniformly increased to hydraulic cylinder rated operating pressure by 0mpa in 50 seconds, and now the 3rd
The data that pressure transducer, second pressure sensor and each pressure sensor are gathered can get liquid after computer process
The lowest starting pressure of cylinder pressure, load efficiency curve；
Step 3, by the test pattern alternate run in the operational mode and step 2 in step 1, by institute after off-test
The information collecting draws the durability performance index of hydraulic cylinder by computer disposal analysis.
In above-mentioned steps two, each index specifically obtains in the following ways；When two four-way proportional reversing valves commutate to right position
Detect multiple detector units in parallel with a mouth, in the set pressure elevation process of proportional pressure control valve, the hydraulic stem of hydraulic cylinder by
Static setting in motion terminates to stop until stroke, and the signal of displacement transducer collection can determine that hydraulic stem motion moment, this moment
The pressure value of second pressure sensor acquisition is the lowest starting pressure of hydraulic cylinder；Displacement transducer can determine that hydraulic stem moves
Time period, within this time period, the pressure value of second pressure sensor acquisition is multiplied with hydraulic cylinder rodless cavity piston area and can obtain liquid
The theoretical power output of cylinder pressure, and the reality output power of the pressure value that in this time period, pressure sensor gathers as hydraulic cylinder, two
Person makees the load efficiency curve that ratio can obtain hydraulic cylinder；In the same manner, two four-way proportional reversing valves commutate to and detect with b mouth simultaneously during left position
In addition multiple detector units of connection.
Compared with prior art, it is an advantage of the current invention that:
1st, hydraulic cylinder can be taken place up to the high-frequency reciprocating exercise endurance test of 30hz, solve existing testing equipment
The problem of reciprocating frequency requirement can not be met.
2nd, whole assay device is reasonable in design: under the commutation action of two four-way proportional reversing valves, multiple hydraulic cylinders are pressed
Hydraulic circuit is divided into two groups to be alternately accomplished the action stretched out, retract；Energy storage module acts the effect absorbing impact, makes system pressure
Remain stable；Force feed filter filtering accuracy height is it is ensured that proportional reversing valve and multiple tested hydraulic cylinder are to high cleanliness fluid
Require；Choke valve is arranged on system oil return road, provides backhaul back pressure for multiple hydraulic cylinders, makes hydraulic cylinder easy motion；Radiating
Device and heater devices, make system oil temperature remain stable.
3rd, apply parallel power-saving technology in endurancing, that is, once test can be simultaneously to multiple (6) high frequency nonoculture
Carry out endurancing with hydraulic cylinder, increased test sample number, simplify assay device, test efficiency is high, time-consuming short, saves
The energy, reduces experimentation cost.
4th, high frequency single-action hydraulic cylinder endurancing major parameter, can be to tested unit all using sensor real-time monitoring
The current state of part makes accurate judgement, and failure cause is made with accurate analysis.
5th, assay device adopts electrical control, and high degree of automation is easy and simple to handle.
Brief description
Fig. 1 is the structural representation of the embodiment of the present invention.
In Fig. 1: 1, energy storage module；2nd, two four-way proportional reversing valves；3rd, pressure transducer；4th, pressure transducer；5、
Stop valve；6th, tested high frequency single-action hydraulic cylinder；7th, graduated cylinder, 8, displacement transducer；9th, pressure sensor；10th, spring loads
Device；11st, the first detector unit；12nd, the second detector unit；13rd, the 3rd detector unit；14th, the 4th detector unit；15th, the 5th
Detector unit；16th, the 6th detector unit；17th, heater；18th, temperature sensor；19th, choke valve；20th, cooler；21st, unidirectional
Valve；22nd, stop valve；23rd, hydraulic pump；24th, motor；25th, proportional pressure control valve；26th, pressure transducer；27th, press oil filter；28、
Fuel tank.
Specific embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
As shown in figure 1, a preferred embodiment for assay device of the present invention.
A kind of high frequency single-action hydraulic cylinder durability test device based on parallel power-saving technology, including
Drive the hydraulic pump 23 of rotation by motor 24, hydraulic pump 23 in-line connects fuel tank 28, fuel tank 28 by stop valve
Inside is provided with the heater 17 to fluid heating, and in order to detect the temperature sensor 18 of oil liquid temperature.Hydraulic pump 23 goes out
Oil circuit connects check valve 21, and check valve 21 rear oil duct is divided into two branch roads, and a branch road is through proportional pressure control valve 25 oil sump tank 28, Ling Yizhi
Road connects force feed filter 27.
Force feed filter 27 other end oil circuit is divided into two branch roads, and a branch road connects the oil-feed interface of energy storage module 1, accumulation of energy
The draining road of device module 1 connects fuel tank 28, and another branch road connects the p mouth of two four-way proportional reversing valves 2.
The t mouth hydraulic circuit of two four-way proportional reversing valves 2 connects fuel tank 28 successively after choke valve 19, radiator 20,
Simultaneously and ter detector unit, the respectively first detector unit 11, second detects singly a mouth of two four-way proportional reversing valves 2
First 12, the 3rd detector unit 13；The b mouth of two four-way proportional reversing valves 2 the other three detector unit in parallel simultaneously, respectively the
Four detector units 14, the 5th detector unit 15, the 6th detector unit 16.
Each detector unit includes stop valve 5, tested high frequency single-action hydraulic cylinder 6, graduated cylinder 7, displacement transducer 8, pressure
Propagated sensation sensor 9 and spring charging device 10, the hydraulic circuit drawn from a mouth and the b mouth of two four-way proportional reversing valves 2, respectively
Oil inlet and outlet through stop valve 5 multiple tested high frequency single-action hydraulic cylinders 6 in parallel, tested high frequency single-action hydraulic cylinder 6
Drain tap connects graduated cylinder 7 after pipeline extraction, and pressure sensor 9 is cylindrical shape, and pressure sensor 9 one end connects tested height
The hydraulic rod end of frequency single-action hydraulic cylinder 6, other end connecting spring charger 10, to detect hydraulic stem power output in time
Change, after the commutation of two four-way proportional reversing valves 2, spring charging device 10 promotes tested high frequency single-action hydraulic cylinder 6
Hydraulic stem reset；Displacement transducer 8 is arranged on hydraulic stem to detect hydraulic stem displacement over time.
In first detector unit to the 6th detector unit, can not except tested high frequency single-action hydraulic cylinder 6 specifications and models
Unanimously, remaining element is completely the same, and each element connected mode is identical.
A first pressure sensor 26 is had to be arranged on proportional pressure control valve 25 in-line with detecting system pressure.
A second pressure sensor 4 is had to be arranged at a mouth of two four-way proportional reversing valves 2, in parallel with a mouth in order to detect
The pressure of the tested high frequency single-action hydraulic cylinder 6 in the first detector unit 11, the second detector unit 12, the 3rd detector unit 13
Change.
One the 3rd pressure transducer 3 is had to be arranged at the b mouth of two four-way proportional reversing valves 2, in parallel with b mouth in order to detect
4th detector unit 14, the 5th detector unit 15, the pressure of the tested high frequency single-action hydraulic cylinder 6 of the 6th detector unit 16 become
Change.
For this assay device, proportional pressure control valve 25 sets up system pressure, and two four-way proportional reversing valves 2 can set high frequency
The commutation action (reaching as high as 30hz) of rate, under the commutation action of reversal valve, 6 tested high frequency single-action hydraulic cylinders press liquid
Force feed road is divided into two groups to be alternately accomplished the action stretched out, retract；Energy storage module 1 acts the effect absorbing impact, makes system pressure
Remain stable；Force feed filter 27 filtering accuracy height is it is ensured that proportional reversing valve 2 and 6 tested hydraulic cylinders are to high cleanliness fluid
Requirement；Choke valve 19 is arranged on system oil return road, provides backhaul back pressure for 6 hydraulic cylinders, makes hydraulic cylinder easy motion；Dissipate
Hot device 20 is matched with heater 17, makes system oil temperature remain stable.
This durability test device is divided into operational mode and test pattern.Under operational mode, hydraulic cylinder carries out life consumption,
Now proportional reversing valve 2 is in high frequency direction changing ratio state, makes hydraulic cylinder reach reciprocating motion number of times requirement within a short period of time, saves
Test period；During test pattern, proportional reversing valve 2 is in relatively low commutating frequency, is suitable to the performance indications to hydraulic cylinder and carries out
Detection, detects lowest starting pressure during endurancing for the high frequency single-action hydraulic cylinder, internal leakage in test mode
Amount, load efficiency curve, piston displacement response curve in time.Durability test device work a period of time under operational mode
Start test pattern afterwards, after completing the performance indications of hydraulic cylinder are detected, switch to operational mode.Both of which is cut automatically
Change, complete to test, high degree of automation.
A kind of test method of employing afore-mentioned test device, comprises the following steps:
Step one: operational mode, in order to detect the life consumption of tested high frequency single-action hydraulic cylinder 6；
It is hydraulic cylinder rated operating pressure that proportional pressure control valve 25 is set up system pressure, and two four-way proportional reversing valves 2 set
It is set to the altofrequency commutation needed for endurancing, adjusting choke valve 19 makes system reach required back pressure, starts motor, motor
Drive hydraulic pump works, assay device brings into operation, make hydraulic cylinder move back and forth certain number of times；
Step 2: test pattern, detection high frequency single-action hydraulic cylinder is during endurancing in test mode
Lowest starting pressure, internal leakage, load efficiency curve, piston displacement response curve in time；
After tested high frequency single-action hydraulic cylinder 6 reciprocates to certain number of times, durability test device is cut automatically
Change to test pattern, now the commutating frequency of two four-way proportional reversing valves 2 automatically switches to the specified of hydraulic cylinder by system and changes
To frequency, proportional pressure control valve 25 set pressure is still hydraulic cylinder rated operating pressure, and the corresponding hydraulic cylinder of displacement transducer collection is lived
Plug displacement response curve in time, the internal leakage of the corresponding hydraulic cylinder of graduated cylinder collection；
After through certain time, information gathering terminates, the commutating frequency of proportional reversing valve 2 is automatically switched 0.01hz by system,
The set pressure of proportional pressure control valve 25 was slowly uniformly increased to hydraulic cylinder rated operating pressure by 0mpa in 50 seconds, and now
The data that three pressure transducers 3, second pressure sensor 4 and each pressure sensor are gathered through computer process after
Lowest starting pressure, load efficiency curve to hydraulic cylinder；
In step 2, each index specifically obtains in the following ways；Two four-way proportional reversing valves 2 commutate to inspection during right position
Survey the multiple detector units in parallel with a mouth, in the set pressure elevation process of proportional pressure control valve 25, the hydraulic stem of hydraulic cylinder 6
By static setting in motion until stroke terminate stop, displacement transducer 8 collection signal can determine that hydraulic stem motion the moment, this when
The pressure value carving second pressure sensor 4 collection is the lowest starting pressure of hydraulic cylinder 6；Displacement transducer 8 can determine that hydraulic pressure
Bar movement time section, the pressure value of second pressure sensor 4 collection and hydraulic cylinder rodless cavity piston area phase within this time period
Take advantage of the theoretical power output that can obtain hydraulic cylinder 6, and in this time period, the pressure value of pressure sensor 9 collection is the reality of hydraulic cylinder 6
Border power output, the two makees the load efficiency curve that ratio can obtain hydraulic cylinder 6；In the same manner, two four-way proportional reversing valves 2 commutate to left position
When detection in addition multiple detector units in parallel with b mouth.
Step 3, by the test pattern alternate run in the operational mode and step 2 in step 1, by institute after off-test
The information collecting draws the durability performance index of hydraulic cylinder by computer disposal analysis.
Although the preferred embodiments of the present invention described in detail above, it is to be clearly understood that for this area
Technical staff for, the present invention can have various modifications and variations.All made within the spirit and principles in the present invention appoint
What modification, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (6)
1. a kind of high frequency single-action hydraulic cylinder durability test device based on parallel power-saving technology it is characterised in that: include
The hydraulic pump (23) rotating is driven by motor (24), hydraulic pump (23) in-line connects fuel tank (28) by stop valve, goes out
Oil circuit connects check valve (21), and check valve (21) rear oil duct is divided into two branch roads, and a branch road is through proportional pressure control valve (25) oil sump tank
(28), another branch road connects force feed filter (27)；
Force feed filter (27) other end oil circuit is divided into two branch roads, and a branch road connects the oil-feed interface of energy storage module (1), accumulation of energy
The draining road of device module (1) connects fuel tank (28), and another branch road connects the p mouth of two four-way proportional reversing valves (2)；
The t mouth hydraulic circuit of two four-way proportional reversing valves (2) connects fuel tank (28), a mouth of two four-way proportional reversing valves (2)
Multiple detector unit (11,12,13) simultaneously in parallel, b mouth parallel connection simultaneously in addition multiple detections of two four-way proportional reversing valves (2)
Unit (14,15,16)；
Each detector unit includes stop valve (5), tested high frequency single-action hydraulic cylinder (6), graduated cylinder (7), displacement transducer
(8), pressure sensor (9) and spring charging device (10), the liquid drawn from a mouth and the b mouth of two four-way proportional reversing valves (2)
Force feed road, the oil inlet and outlet through stop valve (5) multiple tested high frequency single-action hydraulic cylinders (6) in parallel respectively, tested high frequency
The drain tap of single-action hydraulic cylinder (6) connects graduated cylinder (7) after pipeline extraction, and described pressure sensor (9) one end connects tested
High frequency single-action hydraulic cylinder (6) hydraulic rod end, other end connecting spring charger (10), with detect hydraulic stem export
Power is over time；Displacement transducer (8) is arranged on hydraulic stem to detect hydraulic stem displacement over time；
A first pressure sensor (26) is had to be arranged on proportional pressure control valve (25) in-line with detecting system pressure；
A second pressure sensor (4) is had to be arranged at a mouth of two four-way proportional reversing valves (2), in parallel with a mouth in order to detect
The pressure change of tested high frequency single-action hydraulic cylinder (6)；
One the 3rd pressure transducer (3) is had to be arranged at the b mouth of two four-way proportional reversing valves (2), in parallel with b mouth in order to detect
The pressure change of tested high frequency single-action hydraulic cylinder (6).
2. the high frequency single-action hydraulic cylinder durability test device based on parallel power-saving technology according to claim 1, it is special
Levy and be: the heater (17) to fluid heating is installed inside described fuel tank (28), and in order to detect the temperature of oil liquid temperature
Degree sensor (18)；The t mouth hydraulic circuit of two four-way proportional reversing valves (2) is successively after choke valve (19), radiator (20)
Connect fuel tank (28).
3. the high frequency single-action hydraulic cylinder durability test device based on parallel power-saving technology according to claim 1, it is special
Levy and be: a mouth of described two four-way proportional reversing valves (2) simultaneously and ter detector unit, the respectively first detector unit
(11), the second detector unit (12), the 3rd detector unit (13)；The b mouth of two four-way proportional reversing valves (2) is simultaneously and ter is individual
Detector unit, the respectively the 4th detector unit (14), the 5th detector unit (15), the 6th detector unit (16).
4. the high frequency single-action hydraulic cylinder durability test device based on parallel power-saving technology according to claim 1, it is special
Levy and be: described pressure sensor (9) is cylindrical shape.
5. a kind of test method adopting described assay device as arbitrary in aforementioned Claims 1 to 4 it is characterised in that: include with
Lower step:
Step one: operational mode, in order to detect the life consumption of tested high frequency single-action hydraulic cylinder (6)；
It is hydraulic cylinder rated operating pressure that proportional pressure control valve (25) is set up system pressure, and two four-way proportional reversing valves (2) set
It is set to the altofrequency commutation needed for endurancing, adjusting choke valve (19) makes system reach required back pressure, starts motor, electricity
Machine drives hydraulic pump works, and assay device brings into operation, and makes hydraulic cylinder move back and forth certain number of times；
Step 2: test pattern, in test mode detection high frequency single-action hydraulic cylinder (6) during endurancing
Low startup pressure, internal leakage, load efficiency curve, piston displacement response curve in time；
After tested high frequency single-action hydraulic cylinder (6) reciprocates to certain number of times, durability test device automatically switches to
Test pattern, now the commutating frequency of two four-way proportional reversing valves (2) automatically switched to the specified commutation of hydraulic cylinder by system
Frequency, proportional pressure control valve (25) set pressure is still hydraulic cylinder rated operating pressure, and the corresponding hydraulic cylinder of displacement transducer collection is lived
Plug displacement response curve in time, the internal leakage of the corresponding hydraulic cylinder of graduated cylinder collection；
After through certain time, information gathering terminates, the commutating frequency of proportional reversing valve (2) is automatically switched 0.01hz by system, than
The set pressure of example overflow valve (25) was slowly uniformly increased to hydraulic cylinder rated operating pressure by 0mpa in 50 seconds, and now the
The data that three pressure transducers (3), second pressure sensor (4) and each pressure sensor are gathered after computer process i.e.
Can get lowest starting pressure, the load efficiency curve of hydraulic cylinder；
Step 3, by the test pattern alternate run in the operational mode and step 2 in step 1, by being gathered after off-test
To information the durability performance index of hydraulic cylinder is drawn by computer disposal analysis.
6. method according to claim 5 it is characterised in that: in described step 2, each index specifically obtains in the following ways
: two four-way proportional reversing valves (2) commutate to the detection multiple detector units in parallel with a mouth during right position, in proportional pressure control valve
(25) in set pressure elevation process, the hydraulic stem of hydraulic cylinder (6) by static setting in motion until stroke terminates to stop, displacement
The signal that sensor (8) gathers can determine that the hydraulic stem motion moment, and the pressure value that this moment second pressure sensor (4) gathers is
Lowest starting pressure for hydraulic cylinder (6)；Displacement transducer (8) can determine that hydraulic stem movement time section, within this time period
The pressure value that two pressure transducers (4) gather is multiplied with hydraulic cylinder rodless cavity piston area and can obtain the theoretical output of hydraulic cylinder (6)
Power, and the pressure value that in this time period, pressure sensor (9) gathers is the reality output power of hydraulic cylinder (6), the two makees ratio can
Obtain the load efficiency curve of hydraulic cylinder (6)；In the same manner, two four-way proportional reversing valves (2) to commutate to detection during left position in parallel with b mouth
In addition multiple detector units.
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| CN201510297904.XA CN104847738B (en) | 2015-06-03 | 2015-06-03 | Parallel energy-saving technology based high-frequency single-acting hydraulic cylinder durability test device and method |
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| CN103104573A (en) * | 2013-03-11 | 2013-05-15 | 武汉科技大学 | Device and method for testing high-frequency on-load frequency catachrestic of large-size hydraulic cylinder |
| CN204783954U (en) * | 2015-06-03 | 2015-11-18 | 宁波恒力液压股份有限公司 | High frequency is pneumatic cylinder durability test device for nonoculture based on parallel internet technology |
-
2015
- 2015-06-03 CN CN201510297904.XA patent/CN104847738B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1511474A1 (en) * | 1987-01-04 | 1989-09-30 | Производственное Объединение "Красный Экскаватор" Им.60-Летия Ссср | Test rig for hydraulic cylinders |
| CN2651492Y (en) * | 2003-06-23 | 2004-10-27 | 宝钢集团上海梅山有限公司 | Hydraulic test stand |
| KR20070080650A (en) * | 2006-02-08 | 2007-08-13 | 한국기계연구원 | A energy saving device for endurance test of hydraulic cylinder |
| CN103104573A (en) * | 2013-03-11 | 2013-05-15 | 武汉科技大学 | Device and method for testing high-frequency on-load frequency catachrestic of large-size hydraulic cylinder |
| CN204783954U (en) * | 2015-06-03 | 2015-11-18 | 宁波恒力液压股份有限公司 | High frequency is pneumatic cylinder durability test device for nonoculture based on parallel internet technology |
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| CN104847738A (en) | 2015-08-19 |
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