CN207377909U - A kind of sealing piston of hydraulic cylinder experimental rig - Google Patents
A kind of sealing piston of hydraulic cylinder experimental rig Download PDFInfo
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- CN207377909U CN207377909U CN201721426852.2U CN201721426852U CN207377909U CN 207377909 U CN207377909 U CN 207377909U CN 201721426852 U CN201721426852 U CN 201721426852U CN 207377909 U CN207377909 U CN 207377909U
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- hydraulic cylinder
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- piston rod
- pull rod
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Abstract
The utility model discloses a kind of sealing piston of hydraulic cylinder experimental rigs.Including loading hydraulic cylinder, coupling spindle, force sensor device, pull rod, experiment hydraulic cylinder and test bracket；Loading hydraulic cylinder, coupling spindle, force sensor device, pull rod, experiment hydraulic cylinder couple successively, test and are equipped on the piston rod of hydraulic cylinder by test seals, pull rod connection piston rod；Loading hydraulic cylinder, coupling spindle, force sensor device, pull rod, experiment hydraulic cylinder are each attached on test bracket；Loading hydraulic cylinder drives pull rod by coupling spindle, force sensor device, and pull rod drives piston rod to move reciprocatingly, and is moved back and forth by inner wall of cylinder of the test seals in experiment hydraulic cylinder；Force sensor device is used to be detected by the frictional force of test seals.The beneficial effects of the utility model are that test accuracy is high, sealing replacement is simple, experimentation cost is low, attended operation is simple.
Description
Technical field
The utility model belongs to mechanical equipment technical field, is related to a kind of sealing piston of hydraulic cylinder experimental rig.
Background technology
In some Important Project fields, since the cost for replacing faulty equipment is higher, so requiring hydraulic pressure cylinder apparatus
Occasion with high reliability, the service life of reciprocating motion type sealing piston of hydraulic cylinder part newly developed and performance are simulated
Experiment.Simultaneously the service life of reciprocating motion type sealing piston of hydraulic cylinder part newly developed and performance need put into production and use before
Carry out service life and correlated performance experiment.
Utility model content
The purpose of this utility model is to provide a kind of sealing piston of hydraulic cylinder experimental rigs.The beneficial effect of the utility model
Fruit is easily safeguarded for reciprocating motion type sealing piston of hydraulic cylinder part life test precision height, test equipment.
Used by the utility model technical solution be include loading hydraulic cylinder, coupling spindle, force sensor device, pull rod,
Test hydraulic cylinder and test bracket；Loading hydraulic cylinder, coupling spindle, force sensor device, pull rod, experiment hydraulic cylinder couple successively,
It tests and is equipped on the piston rod of hydraulic cylinder by test seals, pull rod connection piston rod；Loading hydraulic cylinder, coupling spindle, power pass
Sensor arrangement, pull rod, experiment hydraulic cylinder are each attached on test bracket；Loading hydraulic cylinder passes through coupling spindle, force sensor device
Pull rod is driven, pull rod drives piston rod to move reciprocatingly, and is carried out back and forth by inner wall of cylinder of the test seals in experiment hydraulic cylinder
Movement；Force sensor device is used to be detected by the frictional force of test seals.
Further, loading hydraulic cylinder is equipped with displacement sensor, for automatically controlling for stroke detection and the speed of service；Examination
It tests on hydraulic cylinder and temperature sensor and pressure sensor is installed, can detect in real time by the working environment of test seals, can divide
Operating mode factor is analysed to by the influence of experiment property of sealing piece；Force sensor device is fixed on rotation prevention pin shaft, rotation prevention pin shaft insertion
In anti-rotation groove, the rotation of force sensor device during experiment is prevented, ensure the security of electrical test equipment.
Further, loading hydraulic cylinder is connected by being interference fitted with Upper shaft sleeve, and top bearing shell passes through interference fit and upper branch
Support seat is connected, and upper support seat is fixed on coupling spindle, and coupling spindle is connected by being interference fitted with Lower shaft sleeve, and lower bearing passes through
Interference fit is connected with lower support base, and lower support base is fixed on test bracket, Upper shaft sleeve, top bearing shell and Lower shaft sleeve, lower axle
Watt to be arranged vertically；The experiment hydraulic cylinder is connected by being interference fitted with experimental liquid cylinder pressure axle sleeve, experimental liquid cylinder pressure bearing shell
It is connected by interference fit and experiment Hydraulic Cylinder Pedestal Used, experiment Hydraulic Cylinder Pedestal Used is fixed on test bracket, ensures examination
Testing hydraulic cylinder can compensate in the up-down direction due to processing and installing the error brought, and improve test accuracy.
Further, the front end of cylinder barrel is equipped with drive end bearing bracket, and drive end bearing bracket is equipped with dustband, sealing and static seal, dust-proof
Circle prevents external contaminants from entering in experiment hydraulic cylinder, and sealing and static seal leak for preventing from testing leakage fluid to experiment
Outside hydraulic cylinder；The front-end and back-end of cylinder barrel are respectively arranged with oil trap, and oil-collecting trench bottom is respectively arranged with oil collecting hole, in cylinder barrel
Portion is provided with temperature survey hole, pick-up hole and upper oil outlet and lower oil inlet, and rear end cap is fixed on the rear end of cylinder barrel, after
End cap is equipped with static seal, and the static seal of rear end cap leaks for preventing from testing leakage fluid to outside experiment hydraulic cylinder；The work
The middle part diameter of stopper rod is less than both ends diameter.
Further, pull rod is connected with piston rod by screw thread and is fixed by back tightening nut.
Further, piston rod is provided at both ends with guide ring, piston rod static seal, sealing ring, card key, card cap and baffle ring, close
It is provided in seal ring by test seals, sealing ring is fixed on the piston rod by card key, card cap and baffle ring；Card key is split type
Structure, if being made of respectively dry plate on same circumference, card cap is monolithic construction, and baffle ring is used to prevent card cap from departing from piston rod
Fixed position.
Further, several set nylon fixing brackets are installed, for the storage of piston rod on test bracket.
Further, positioned, eliminated by fixed pin shaft between upper support seat, lower support base, coupling spindle and test bracket
Due to processing and assembling the error brought, the positioning accuracy of loading hydraulic cylinder is improved.
The beneficial effects of the utility model are that test accuracy is high, sealing replacement is simple, experimentation cost is low, attended operation is simple
It is single.
Description of the drawings
Fig. 1 is reciprocating motion type piston seal experimental rig structure diagram；
Fig. 2 is reciprocating motion type piston seal experimental rig top view；
Fig. 3 is coupling spindle top schematic diagram；
Fig. 4 is coupling spindle lower part schematic diagram；
Fig. 5 is experiment hydraulic cylinder connection diagram；
Fig. 6 is experiment hydraulic cylinder internal structure schematic diagram；
Fig. 7 is card key, card cap and baffle ring schematic diagram.
In figure, 1. loading hydraulic cylinders, 101. displacement sensors, 102. plug chamber hydraulic fluid ports, 103. rod cavity hydraulic fluid ports, 2. coupling spindles,
201. Upper shaft sleeves, 202. top bearing shells, 203. upper support seats, 204. Lower shaft sleeves, 205. lower bearinges, 206. times support bases, 3. power pass
Sensor arrangement, 4. pull rods, 5. experiment hydraulic cylinders, 501. piston rods, 502. cylinder barrels, 503. experimental liquid cylinder pressure axle sleeves, 504. experiments
Hydraulic cylinder bearing shell, 505. experiment Hydraulic Cylinder Pedestal Useds, 506. drive end bearing brackets, 507. dustbands, 508. sealings, 509. static seals,
510. oil traps, 511. oil collecting holes, 512. temperature survey holes, 513. pick-up holes, oil outlet on 514., 515. times oil inlets
Mouthful, 516. rear end caps, 517. guide rings, 518. piston rod static seals, 519. sealing rings, 520. card keys, 521. card caps, 522. gears
Circle, 5201. first semicircle card keys, 5202. second semicircle card keys, 6. by test seals, 7. test brackets, 8. temperature sensing
Device, 9. pressure sensors, 10. rotation prevention pin shafts, 11. anti-rotation grooves, 12. back tightening nuts, 13. nylon fixing brackets, 14. fixed pins
Axis, 15. dry oil lubrication lubricating cups.
Specific embodiment
The utility model is described in detail With reference to embodiment.
As depicted in figs. 1 and 2, loading hydraulic cylinder 1, coupling spindle 2, force sensor device 3, pull rod 4, experiment hydraulic cylinder 5 according to
Secondary connection is tested and is equipped on the piston rod 501 of hydraulic cylinder 5 by test seals 6,4 connection piston rod 501 of pull rod；Load liquid
Cylinder pressure 1, coupling spindle 2, force sensor device 3, pull rod 4, experiment hydraulic cylinder 5 are each attached on test bracket 7；Loading hydraulic cylinder 1
Pull rod 4 is driven by coupling spindle 2, force sensor device 3, pull rod 5 drives piston rod 501 to move reciprocatingly, by test seals 6
It moves back and forth in 502 inner wall of cylinder barrel of experiment hydraulic cylinder 5；Force sensor device 3 is used for by the frictional force of test seals 6
Detection；Wherein loading hydraulic cylinder 1 is equipped with displacement sensor 101, for automatically controlling for stroke detection and the speed of service；Experiment
Temperature sensor 8 and pressure sensor 9 on hydraulic cylinder 5 are installed, can be detected in real time by the working environment of test seals 6, energy
Operating mode factor is analyzed to by the influence of 6 performance of test seals.Force sensor device 4 is fixed on rotation prevention pin shaft 10, stop pin
Axis 10 is inserted into anti-rotation groove 11, prevents the rotation of force sensor device 3 during experiment, ensures the safety of electrical test equipment
Property.
As shown in Figure 3 and Figure 4, loading hydraulic cylinder 1 is connected by being interference fitted with Upper shaft sleeve 201, and top bearing shell 202 passes through
Interference fit be connected with upper support seat 203, upper support seat 203 is fixed on coupling spindle 2, coupling spindle 2 by interference fit and
Lower shaft sleeve 204 is connected, and lower bearing 205 is connected by being interference fitted with lower support base 206, and lower support base 206 is fixed on examination
It tests on stent 7.Upper shaft sleeve 201, top bearing shell 202, to be arranged vertically, ensure loading hydraulic cylinder 1 with Lower shaft sleeve 204, lower bearing 205
Automatic compensation function can be realized on the four direction of space, can compensate due to processing and installing the error brought, improve experiment essence
Degree avoids even the situation of equipment damage occur since processing and rigging error cause test accuracy to reduce.
As shown in figure 5, experiment hydraulic cylinder 5 is connected by being interference fitted with experimental liquid cylinder pressure axle sleeve 503, hydraulic cylinder is tested
Bearing shell 504 is connected by interference fit and experiment Hydraulic Cylinder Pedestal Used 505, and experiment Hydraulic Cylinder Pedestal Used 505 is fixed on experiment
On stent 7, guarantee test hydraulic cylinder 5 can be compensated in the up-down direction due to processing and installing the error brought, and improve experiment essence
Degree.
As shown in fig. 6, the front end of cylinder barrel 502 is equipped with drive end bearing bracket 506, it is close that drive end bearing bracket 506 is equipped with dustband 507, axis
Envelope 508 and static seal 509, dustband 507 prevent external contaminants from entering in experiment hydraulic cylinder 5, sealing 508 and static seal
509 leak for preventing from testing leakage fluid to outside experiment hydraulic cylinder 5.The front-end and back-end of cylinder barrel 502 are respectively arranged with triangle
The oil trap 510 of shape, 510 bottom of oil trap are respectively arranged with oil collecting hole 511, and the middle part of cylinder barrel 502 is provided with temperature survey hole
512nd, pick-up hole 513 and upper oil outlet 514 and lower oil inlet 515.Rear end cap 516 is fixed on the rear end of cylinder barrel 502, after
End cap 516 is equipped with static seal 509.The static seal 509 of rear end cap 516 leaks for preventing from testing leakage fluid to experiment hydraulic pressure
Outside cylinder 5.The middle part diameter of piston rod 501 is less than both ends diameter, respectively by both ends by test seals 6, static seal
509th, cylinder barrel 502, upper oil outlet 514 and lower oil inlet 515 form the closed containing cavity tested, and the cavity volume is in piston rod 501
Working cycles in cavity volume volume remain constant, so from lower oil inlet 515 supply by test seals 6 high pressure try
It is very small to test the traffic demand amount of pressure oil liquid, significantly reduces the power configuration of hydraulic power station.Test the cylinder barrel of hydraulic cylinder
Oil outlet 514 is provided at both ends with, mileage is set in operation by test seals by measuring cup or flowmeter energy Accurate Determining
Leakage rate afterwards.Pull rod 4 is connected with piston rod 501 by screw thread and is fixed by back tightening nut 12, prevents from running in equipment
Occurs the loosening between pull rod 4 and piston rod 501 in journey.Piston rod 501 is provided at both ends with guide ring 517, piston rod static seal
518th, sealing ring 519, card key 520, card cap 521 and baffle ring 522 are provided with by test seals 6, sealing ring on sealing ring 519
519 are fixed on by card key 520, card cap 521 and baffle ring 522 on piston rod 501.
As shown in fig. 7, dismantling and replacing sealing ring 519 for convenience and by test seals 6, card key 520 is split type
Structure is at least made of on same circumference the first semicircle card key 5201,5202 two panels of the second semicircle card key respectively.Card cap 521
For monolithic construction, prevent the first semicircle card key 5201 and the second semicircle card key 5202 from departing from the fixed position of piston rod 501.Gear
Circle 522 is used for the fixed position for preventing card cap 521 from departing from piston rod 501.Sealing ring 519 is used through the first semicircle card key
5201st, the fixed structure of the second semicircle card key 5202, card cap 521 and baffle ring 522 can realize fast quick-detach, so as to fulfill quick
It replaces by the function of test seals 6, while when being other different structure types by test seals 6, it is only necessary to according to quilt
The groove dimensions of test seals 6 re-work sealing ring 519 can be realized test other patterns by test seals 6 will
It asks.
Four sets of nylon fixing brackets 13 are spaced apart and are fixed on test bracket 7, are sealed for frequently replacing by experiment
During part 6, the storage of piston rod 501, prevent pull rod 4 and piston rod 501 damage and guarantee test hydraulic cylinder 5 inside cleaning
Degree.Positioned between upper support seat 203, lower support base 206, coupling spindle 2 and test bracket 7 by fixed pin shaft 14, eliminate by
In the error that processing and assembling are brought, the positioning accuracy of raising loading hydraulic cylinder 1.Dry oil lubrication lubricating cup 15 for Upper shaft sleeve 201,
The injection of lubricating oil between top bearing shell 202, Lower shaft sleeve 204, the friction of lower bearing 205 are secondary, reducing frictional force and abrasion, extension makes
Use the service life.
The course of work of the utility model is as follows：
Sealing ring 519 is processed according to by the groove dimensions of test seals 6, sealing ring will be mounted on by test seals 6
On 519, pass through the first semicircle card key 5201,522 quick fixing seal ring of the second semicircle card key 5202, card cap 521 and baffle ring
519, pull rod 4 on piston rod 501 and tightens back tightening nut 12 by screw threads for fastening, and the other end of pull rod 4 passes through screw thread and power
Sensor device 3 is connected.Pacified respectively by screw thread on temperature survey hole 512, pick-up hole 513 on experiment hydraulic cylinder 5
Temperature sensor 8 and pressure sensor 9 are filled, lower oil inlet 515 is logical by the high-voltage oil liquid needed for test seals 6, upper oil outlet
514 lead to hydraulic station oil return opening through restriction, and measuring cup or electricity are placed in two 511 lower parts of oil collecting hole tested on hydraulic cylinder 5 respectively
Subflow gauge with detect by leaked by test seals 6 and respectively pass through oil collecting hole 511 flow.The plug chamber of loading hydraulic cylinder 1
Hydraulic fluid port 102 leads to high-voltage oil liquid through hydraulic system, while the rod cavity hydraulic fluid port 103 of loading hydraulic cylinder 1 leads to hydraulic system oil return, loads liquid
The piston rod of cylinder pressure 1 stretches out, and force sensor device 3 and the piston rod 501 of experiment hydraulic cylinder 5 is driven to retract；Work as displacement sensor
101 detect loading hydraulic cylinder 1 stroke reach setting position when, the plug chamber hydraulic fluid port 102 of HYDRAULIC CONTROL SYSTEM loading hydraulic cylinder 1
Logical oil return, while the rod cavity hydraulic fluid port 103 of loading hydraulic cylinder 1 leads to high-voltage oil liquid, the piston rod of loading hydraulic cylinder 1 is retracted, driving force
The piston rod 501 of sensor device 3 and experiment hydraulic cylinder 5 stretches out, and system completes a working cycles.
In above-mentioned working cycle process, hydraulic cylinder 5 as described above of testing passes through the subject at 501 both ends of piston rod respectively
Sealing element 6, static seal 509, cylinder barrel 502, upper oil outlet 514 and lower oil inlet 515 is tested to form in the closed containing cavity tested
Always the fluid with certain temperature and pressure of test requirements document is led to, which is by the test pressure of test seals 6.
According to test requirements document, the automatic speed of service for setting loading hydraulic cylinder 1 and working cycles number are close by experiment to examine and verify
The property indices of sealing 6.
The advantages of the utility model, also resides in loading hydraulic cylinder and can be compensated on the four direction of space due to processing and installing
The error brought improves test accuracy；Experiment hydraulic cylinder piston sealing device is coupled using cutting ferrule with card cap, the fixed knot of baffle ring
Configuration formula realizes quick-replaceable difference by the function of experiment seal type.There is the utility model test accuracy height, sealing to replace
Simply, experimentation cost is low, attended operation is simple and high degree of automation.
The above is only the better embodiment to the utility model, not makees any form to the utility model
On limitation, every any simple modification made to embodiment of above according to the technical essence of the utility model is equivalent to become
Change and modify, belong in the range of technical solutions of the utility model.
Claims (8)
1. a kind of sealing piston of hydraulic cylinder experimental rig, it is characterised in that：It is passed including loading hydraulic cylinder (1), coupling spindle (2), power
Sensor arrangement (3), pull rod (4), experiment hydraulic cylinder (5) and test bracket (7)；Loading hydraulic cylinder (1), coupling spindle (2), power sensing
Device device (3), pull rod (4), experiment hydraulic cylinder (5) couple successively, experiment hydraulic cylinder (5) piston rod (501) on be equipped with by
Test seals (6), pull rod (4) connection piston rod (501)；Loading hydraulic cylinder (1), coupling spindle (2), force sensor device (3),
Pull rod (4), experiment hydraulic cylinder (5) are each attached on test bracket (7)；
Loading hydraulic cylinder (1) drives pull rod (4) by coupling spindle (2), force sensor device (3), and pull rod (4) drives piston rod
(501) move reciprocatingly, moved back and forth by cylinder barrel (502) inner wall of test seals (6) in experiment hydraulic cylinder (5)；Power
Sensor device (3) is used to be detected by the frictional force of test seals (6).
2. according to a kind of sealing piston of hydraulic cylinder experimental rig described in claim 1, it is characterised in that：The loading hydraulic cylinder
(1) displacement sensor (101) is installed, for automatically controlling for stroke detection and the speed of service；It is installed on experiment hydraulic cylinder (5)
There are temperature sensor (8) and pressure sensor (9), can detect in real time by the working environment of test seals (6), operating mode can be analyzed
Factor is to by the influence of test seals (6) performance；Force sensor device (3) is fixed on rotation prevention pin shaft (10), rotation prevention pin shaft
(10) it is inserted into anti-rotation groove (11), prevents the rotation of force sensor device (3) during experiment, ensures the peace of electrical test equipment
Quan Xing.
3. according to a kind of sealing piston of hydraulic cylinder experimental rig described in claim 1, it is characterised in that：The loading hydraulic cylinder
(1) it is connected by being interference fitted with Upper shaft sleeve (201), top bearing shell (202) is connected by being interference fitted with upper support seat (203)
It connecing, upper support seat (203) is fixed on coupling spindle (2), and coupling spindle (2) is connected by being interference fitted with Lower shaft sleeve (204), under
Bearing shell (205) is connected by being interference fitted with lower support base (206), and lower support base (206) is fixed on test bracket (7),
Upper shaft sleeve (201), top bearing shell (202) and Lower shaft sleeve (204), lower bearing (205) are to be arranged vertically；The experiment hydraulic cylinder (5)
It is connected by being interference fitted with experimental liquid cylinder pressure axle sleeve (503), experimental liquid cylinder pressure bearing shell (504) passes through interference fit and experiment
Hydraulic Cylinder Pedestal Used (505) is connected, and experiment Hydraulic Cylinder Pedestal Used (505) is fixed on test bracket (7), guarantee test hydraulic pressure
Cylinder (5) can be compensated in the up-down direction due to processing and installing the error brought, and improve test accuracy.
4. according to a kind of sealing piston of hydraulic cylinder experimental rig described in claim 1, it is characterised in that：The cylinder barrel (502)
Front end is equipped with drive end bearing bracket (506), and drive end bearing bracket (506) is equipped with dustband (507), sealing (508) and static seal (509),
Dustband (507) prevents external contaminants from entering in experiment hydraulic cylinder (5), and sealing (508) and static seal (509) are used to prevent
Experiment leakage fluid leaks to experiment hydraulic cylinder (5) outside；The front-end and back-end of cylinder barrel (502) are respectively arranged with oil trap (510),
Oil trap (510) bottom is respectively arranged with oil collecting hole (511), and temperature survey hole (512), pressure are provided in the middle part of cylinder barrel (502)
Power measured hole (513) and upper oil outlet (514) and lower oil inlet (515), after rear end cap (516) is fixed on cylinder barrel (502)
End, rear end cap (516) are equipped with static seal (509), and the static seal (509) of rear end cap (516) leaks fluid for preventing from testing
It leaks to experiment hydraulic cylinder (5) outside；The middle part diameter of the piston rod (501) is less than both ends diameter.
5. according to a kind of sealing piston of hydraulic cylinder experimental rig described in claim 1, it is characterised in that：The pull rod (4) passes through
Screw thread is connected with piston rod (501) and is fixed by back tightening nut (12).
6. according to a kind of sealing piston of hydraulic cylinder experimental rig described in claim 1, it is characterised in that：The piston rod (501)
It is provided at both ends with guide ring (517), piston rod static seal (518), sealing ring (519), card key (520), card cap (521) and baffle ring
(522), be provided on sealing ring (519) by test seals (6), sealing ring (519) by card key (520), card cap (521) and
Baffle ring (522) is fixed on piston rod (501)；Card key (520) is split structure, if respectively by dry plate group on same circumference
Into card cap (521) is monolithic construction, and baffle ring (522) is used for the fixed position for preventing card cap (521) from departing from piston rod (501).
7. according to a kind of sealing piston of hydraulic cylinder experimental rig described in claim 1, it is characterised in that：The test bracket (7)
On be equipped with it is several set nylon fixing brackets (13), for the storage of piston rod (501).
8. according to a kind of sealing piston of hydraulic cylinder experimental rig described in claim 3, it is characterised in that：The upper support seat
(203), positioned between lower support base (206), coupling spindle (2) and test bracket (7) by fixed pin shaft (14), eliminate due to
The error that processing and assembling are brought improves the positioning accuracy of loading hydraulic cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721426852.2U CN207377909U (en) | 2017-10-31 | 2017-10-31 | A kind of sealing piston of hydraulic cylinder experimental rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721426852.2U CN207377909U (en) | 2017-10-31 | 2017-10-31 | A kind of sealing piston of hydraulic cylinder experimental rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207377909U true CN207377909U (en) | 2018-05-18 |
Family
ID=62333670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721426852.2U Active CN207377909U (en) | 2017-10-31 | 2017-10-31 | A kind of sealing piston of hydraulic cylinder experimental rig |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207377909U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605862A (en) * | 2017-10-31 | 2018-01-19 | 中国重型机械研究院股份公司 | A kind of reciprocating motion type piston seal experimental rig |
| JP2021055708A (en) * | 2019-09-27 | 2021-04-08 | 日立建機株式会社 | Construction machine and system for calculating cylinder component replacement time |
-
2017
- 2017-10-31 CN CN201721426852.2U patent/CN207377909U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605862A (en) * | 2017-10-31 | 2018-01-19 | 中国重型机械研究院股份公司 | A kind of reciprocating motion type piston seal experimental rig |
| JP2021055708A (en) * | 2019-09-27 | 2021-04-08 | 日立建機株式会社 | Construction machine and system for calculating cylinder component replacement time |
| JP7301702B2 (en) | 2019-09-27 | 2023-07-03 | 日立建機株式会社 | Construction Machinery and Cylinder Parts Replacement Timing Prediction System |
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