CN208845480U - Discharge measuring device in a kind of hydraulic cylinder - Google Patents
Discharge measuring device in a kind of hydraulic cylinder Download PDFInfo
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- CN208845480U CN208845480U CN201821045724.8U CN201821045724U CN208845480U CN 208845480 U CN208845480 U CN 208845480U CN 201821045724 U CN201821045724 U CN 201821045724U CN 208845480 U CN208845480 U CN 208845480U
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Abstract
Discharge measuring device in a kind of hydraulic cylinder, the measurement suitable for various hydraulic cylinder internal leakages.Measuring device is mainly made of load driver system, hand metering unit and oil pressure acquisition processing device, tested hydraulic cylinder is fixedly connected among measuring device, all ball valves are opened, and safety valve and pilot pressure governor tune loose unloading are carried, run piston to uppermost position in fig-ure；Start variable pump, closes ball valve IV and ball valve III, operation solenoid directional control valve to left position or right position, regulation safety valve, after the set pressure value that pressure reaches required, operation solenoid directional control valve returns to middle position；Open ball valve IV and ball valve III；The big endoluminal leak amount of tested hydraulic cylinder and small endoluminal leak amount are measured respectively.Realize the online precise measurement of hydraulic cylinder internal leakage；Low pressure and mass flow variable pump and high-pressure low-flow pump are organically combined, realizes and fast moves energy-efficient with high pressure load, energy high-precision, online, the various hydraulic cylinder internal leakages of quantitative measurment.
Description
Technical field
The utility model relates to a kind of internal leakage measuring devices, are suitable for letting out in various hydraulic cylinders more particularly to one kind
The measuring device of leakage.
Background technique
The quick-wear part of hydraulic cylinder is sealing element, once damage if lead to internal leakage or external leakage, prevent hydraulic cylinder from
It works normally or pollutes, waste.Hydraulic cylinder external leakage can be intuitive visible, but internal leakage is not easy to judge；This direct shadow
The assessment to mechanized equipment service performance is rung, when especially carrying out hydraulic cylinder reliability test, to the whether interior leakage of hydraulic cylinder, interior leakage
Grasp to key messages such as what degree brings difficulty.Currently, people mainly measure hydraulic cylinder using following several method
Internal leakage: (1) pressure maintaining method that is, by a chamber of hydraulic cylinder full of hydraulic oil to rated pressure, and is closed, and oil pressure is observed
Situation of change, this method can only qualitatively reflect hydraulic cylinder, and whether there is or not internal leakages, are difficult the degree of its internal leakage of rational judgment；
(2) hydraulic cylinder is parked in some position, while making hydraulic cylinder after one chamber oil inlet of hydraulic cylinder is run certain stroke by sedimentation
Load, marks, after a period of time, the situation of change of position markers is observed, and measure hydraulic cylinder amount of movement, further according to hydraulic
Cylinder internal diameter of cylinder calculates internal leakage, and this method by hydraulic cylinder amount of movement measurement error because being influenced, so that calculated result
There are biggish errors, and when especially leakage rate is little, error will be bigger；(3) measuring cup mensuration, i.e., by one chamber of hydraulic cylinder into
Oil completes entire impulse stroke and out of service and after being loaded into rated pressure, and another chamber oil connection is unclamped, is connect with measuring cup
The hydraulic oil that letter flow goes out, while the time is recorded with stopwatch, discharge oily in the unit time is calculated, there is also such as this method
Lower deficiency: first is that measuring cup precision is not high, second is that if oil droplet is noncontinuity drippage when interior leakage quantity is seldom, so that in the calculating of time
There are large errors；(4) hydraulic servo cylinder mensuration detects the interior of large-diameter hydraulic cylinder using the servoBcylinder of elongated cylinder diameter
Leakage, and the temperature of strict control hydraulic oil, viscosity, pass through displacement sensor hydraulic cylinder travel；Liquid is utilized in this method
ServoBcylinder, sensor, computer etc. are pressed, measurement accuracy significantly improves, but the internal leakage of servoBcylinder itself, the compression of hydraulic oil
The influence that air capacity etc. is mixed into rate, hydraulic oil cannot also be eliminated；(5) gear meter mensuration uses gear sensor
The method of flow judges the whether interior leakage of hydraulic cylinder in detection pipeline, and this method is theoretically said, though good with detection timeliness,
The features such as small internal leakage can be detected, but practice examining is also lacked, and the higher cost of gear meter.Therefore, it is badly in need of
It is a kind of that technology and method is leaked using brand new principle measurement hydraulic cylinder interior leakage.
Summary of the invention
Technical problem: the purpose of the utility model is to overcome shortcoming in the prior art, provide a kind of structure it is simple,
Easy to operate, energy high-precision, online, the various hydraulic cylinder internal leakages of quantitative measurment device.
Technical solution: to achieve the above object, discharge measuring device in the hydraulic cylinder of the utility model, including test solution
Cylinder pressure, load driver system, further include hand metering unit and oil pressure acquisition processing device, and the load driver system includes electricity
Magnetic reversal valve), safety valve, variable pump, constant displacement pump, main pressure valve, pilot pressure governor, the variable pump and constant displacement pump pass through respectively respectively
Connected from exit through the oil inlet of check valve and solenoid directional control valve, the exit of variable pump and constant displacement pump be separately connected with
The safety valve and main pressure valve of fuel tank connection, main pressure valve connect the pilot pressure governor being connected to fuel tank, the solenoid directional control valve
Two actuator ports pass through the big chamber of ball valve II and ball valve I and tested oil liquid cylinder pressure respectively and small chamber connects；
The hand metering unit includes cylinder barrel, the piston being located in cylinder barrel, the screw rod being connected with piston, screw rod it is upper
Portion is equipped with the nut for being threaded in cylinder barrel port, and the outer end of nut is equipped with the metering for being threadedly coupled and being fixed on cylinder barrel outer wall and carves
Scale, the outer end of metering scale disk are equipped with instruction disk, multiple handles are housed on the instruction disk, and be fixed on by nut
The upper end of screw rod；The lower port of the cylinder barrel is welded with cylinder bottom, and there are two tapped through hole, two tapped through holes for processing on cylinder bottom
It is connected respectively by ball valve IV and ball valve III and corresponding oil pipe with the big chamber of tested hydraulic cylinder and small chamber；In cylinder barrel
Portion is fixed on the rack by flange and screw；The piston is fixedly connected on the lower end of screw rod, piston and cylinder by card key
Sealing ring is equipped between cylinder inner wall；
The oil pressure acquisition processing device includes pressure sensor I, pressure sensor II and computer control and processing
System, the pressure sensor I are located on the big chamber oil circuit of tested hydraulic cylinder, the pressure sensor II be located at be tested it is hydraulic
On the small chamber oil circuit of cylinder, pressure sensor I and pressure sensor II are controlled with computer through conducting wire be connected with processing system respectively,
Send pressure signal to computer control and processing system.
Anti-friction ring is installed between the lower end and piston of the screw rod.
The solenoid directional control valve is three position four-way directional control valve.
Pressure gauge I is provided on the big chamber oil circuit with tested hydraulic cylinder.
Pressure gauge II is provided on the small chamber oil circuit with tested hydraulic cylinder.
The utility model has the advantages that by adopting the above-described technical solution, the utility model utilizes the compression property of hydraulic oil, using hand
Dynamic metering device and high-precision metering scale disk, realize the online precise measurement of hydraulic cylinder internal leakage；By the big stream of low pressure
Measure variable pump and high-pressure low-flow pump organically combine, realize fast move with high pressure load it is energy-efficient, can high-precision,
Line, the various hydraulic cylinder internal leakages of quantitative measurment.Its structure is simple, easy to operate, and effect is good, has in the art
Wide applicability.
Detailed description of the invention
Fig. 1 is the principle schematic diagram of the utility model.
In figure: 1- cylinder barrel；2- sealing ring；3- piston；4- anti-friction ring；5- card key；6- rack；7- screw；8- flange；9- spiral shell
Bar；10- nut；11- handle；12- indicates disk；13- metering scale disk；14- pressure gauge I；15- pressure sensor I；16- is calculated
Machine control and processing system；17- pressure sensor II；18- pressure gauge II；19- ball valve I；20- solenoid directional control valve；21- safety
Valve；22- variable pump；23- constant displacement pump；24- main pressure valve；25- pilot pressure governor；26- ball valve II；27- ball valve III；28- ball
Valve IV.
Specific embodiment
One embodiment of the utility model is further described with reference to the accompanying drawing:
Discharge measuring device in the hydraulic cylinder of the utility model, mainly by load driver system, hand metering unit and
Oil pressure acquisition processing device is constituted, and the load driver system includes solenoid directional control valve (20), safety valve (21), variable pump
(22), constant displacement pump (23), main pressure valve (24), pilot pressure governor (25), the variable pump (22) and constant displacement pump (23) pass through respectively
Respective exit is connected through the oil inlet of check valve and solenoid directional control valve (20), variable pump (22) and constant displacement pump (23) out
The safety valve (21) and main pressure valve (24) being connected to fuel tank are separately connected at mouthful, main pressure valve (24) connection is connected to fuel tank
Pilot pressure governor (25), two actuator ports of the solenoid directional control valve (20) pass through respectively ball valve II (26) and ball valve I (19) with
The big chamber and small chamber of tested oil liquid cylinder pressure connect；The solenoid directional control valve (20) is three position four-way directional control valve.
The hand metering unit includes cylinder barrel (1), the piston (3) being located in cylinder barrel, the screw rod being connected with piston (3)
(9), the top of screw rod (9) is equipped with the nut (10) for being threaded in cylinder barrel (1) port, and the outer end of nut (10) connects equipped with screw thread
The metering scale disk (13) being fixed on cylinder barrel (1) outer wall is connect, the outer end of metering scale disk (13) is equipped with instruction disk (12), institute
Multiple handles (11) are housed on the instruction disk (12) stated, and are fixed on the upper end of screw rod (9) by nut；The cylinder barrel (1)
Lower port is welded with cylinder bottom, on cylinder bottom processing there are two tapped through hole, two tapped through holes pass through respectively ball valve IV (28) and
Ball valve III (27) and corresponding oil pipe are connected with the big chamber of tested hydraulic cylinder and small chamber；With the big chamber oil of tested hydraulic cylinder
Road is provided with pressure gauge I (14)；Pressure gauge II (18) are provided with on the small chamber oil circuit of tested hydraulic cylinder.In cylinder barrel (1)
Portion is fixed on rack (6) by flange (8) and screw (7)；The piston (3) is fixedly connected on screw rod by card key (5)
(9) lower end is installed with anti-friction ring (4) between the lower end and piston (3) of the screw rod (9).In piston (3) and cylinder barrel (1)
Sealing ring (2) are equipped between wall；
The oil pressure acquisition processing device includes pressure sensor I (15), pressure sensor II (17) and computer control
System and processing system (16), the pressure sensor I (15) are located on the big chamber oil circuit of tested hydraulic cylinder, the pressure sensing
Device II (17) is located on the small chamber oil circuit of tested hydraulic cylinder, and pressure sensor I (15) and pressure sensor II (17) are respectively through leading
Line is controlled with computer to be connected with processing system (16), sends pressure signal to computer control and processing system (16).
Claims (5)
1. discharge measuring device in a kind of hydraulic cylinder, including tested hydraulic cylinder, load driver system, it is characterised in that: also wrap
Hand metering unit and oil pressure acquisition processing device are included, the load driver system includes solenoid directional control valve (20), safety valve
(21), variable pump (22), constant displacement pump (23), main pressure valve (24), pilot pressure governor (25), the variable pump (22) and constant displacement pump
(23) it is connected respectively through respective exit through the oil inlet of check valve and solenoid directional control valve (20), variable pump (22) and quantitative
The exit of pump (23) is separately connected the safety valve (21) and main pressure valve (24) be connected to fuel tank, main pressure valve (24) connect and
The pilot pressure governor (25) of fuel tank connection, two actuator ports of the solenoid directional control valve (20) pass through ball valve II (26) and ball respectively
Valve I (19) is connected with the big chamber of tested oil liquid cylinder pressure and small chamber；
The hand metering unit includes cylinder barrel (1), the piston (3) being located in cylinder barrel, the screw rod (9) being connected with piston (3),
The top of screw rod (9) is equipped with the nut (10) for being threaded in cylinder barrel (1) port, and the outer end of nut (10), which is equipped with, to be threadedly coupled admittedly
The metering scale disk (13) being scheduled on cylinder barrel (1) outer wall, the outer end of metering scale disk (13) is equipped with instruction disk (12), described
It indicates that multiple handles (11) are housed on disk (12), and is fixed on the upper end of screw rod (9) by nut；The lower end of the cylinder barrel (1)
Mouth is welded with cylinder bottom, and there are two tapped through holes, two tapped through holes to pass through ball valve IV (28) and ball valve respectively for processing on cylinder bottom
III (27) and corresponding oil pipe are connected with the big chamber of tested hydraulic cylinder and small chamber；The middle part of cylinder barrel (1) passes through flange (8)
It is fixed on rack (6) with screw (7)；The piston (3) is fixedly connected on the lower end of screw rod (9), piston by card key (5)
(3) sealing ring (2) are equipped between cylinder barrel (1) inner wall；
The oil pressure acquisition processing device include pressure sensor I (15), pressure sensor II (17) and computer control with
Processing system (16), the pressure sensor I (15) are located on the big chamber oil circuit of tested hydraulic cylinder, the pressure sensor II
(17) be located on the small chamber oil circuit of tested hydraulic cylinder, pressure sensor I (15) and pressure sensor II (17) respectively through conducting wire with
Computer control is connected with processing system (16), sends pressure signal to computer control and processing system (16).
2. discharge measuring device in a kind of hydraulic cylinder according to claim 1, it is characterised in that: the screw rod (9)
Lower end and piston (3) between be installed with anti-friction ring (4).
3. discharge measuring device in a kind of hydraulic cylinder according to claim 1, it is characterised in that: the electromagnetic switch
Valve (20) is three position four-way directional control valve.
4. discharge measuring device in a kind of hydraulic cylinder according to claim 1, it is characterised in that: described and test solution
Pressure gauge I (14) are provided on the big chamber oil circuit of cylinder pressure.
5. discharge measuring device in a kind of hydraulic cylinder according to claim 1, it is characterised in that: described and test solution
Pressure gauge II (18) are provided on the small chamber oil circuit of cylinder pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821045724.8U CN208845480U (en) | 2018-07-03 | 2018-07-03 | Discharge measuring device in a kind of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821045724.8U CN208845480U (en) | 2018-07-03 | 2018-07-03 | Discharge measuring device in a kind of hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208845480U true CN208845480U (en) | 2019-05-10 |
Family
ID=66352800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821045724.8U Active CN208845480U (en) | 2018-07-03 | 2018-07-03 | Discharge measuring device in a kind of hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208845480U (en) |
-
2018
- 2018-07-03 CN CN201821045724.8U patent/CN208845480U/en active Active
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