CN103410810B - Testing device for testing durability of sealing parts of hydraulic cylinder - Google Patents

Testing device for testing durability of sealing parts of hydraulic cylinder Download PDF

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Publication number
CN103410810B
CN103410810B CN201310351494.3A CN201310351494A CN103410810B CN 103410810 B CN103410810 B CN 103410810B CN 201310351494 A CN201310351494 A CN 201310351494A CN 103410810 B CN103410810 B CN 103410810B
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China
Prior art keywords
cylinder
pressure
oil
seal
piston
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CN201310351494.3A
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Chinese (zh)
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CN103410810A (en
Inventor
熊望胜
艾正元
李源
李志军
周乃平
杨金雷
韩振华
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湖南特力液压有限公司
中联重科股份有限公司
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Publication of CN103410810A publication Critical patent/CN103410810A/en
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Abstract

The invention discloses a testing device for testing durability of sealing parts of a hydraulic cylinder. The testing device comprises the tested hydraulic cylinder, a driving unit (100) and a pressure oil fluid supplying unit (200); the driving unit (100) is used for driving a piston rod of the tested hydraulic cylinder to perform reciprocating linear motion; a first annular groove which is used for placing a piston sealing part (401) and/or a second annular groove which is used for placing a piston rod sealing part (301) are/is formed in the tested hydraulic cylinder; the pressure oil fluid supplying unit comprises a pressure cylinder (201), an oil tank (202) and a reversing valve (203); the working chamber of the pressure cylinder is connected with the oil tank through the reversing valve; the oil inlet of the high pressure chamber of the pressure cylinder is connected with the oil tank; the oil outlet of the high pressure chamber of the pressure cylinder is connected with the first annular groove and/or the second annular groove. According to the testing device for testing the durability of the sealing parts of the hydraulic cylinder, the pressure of pressure oil fluid is increased through the pressure cylinder to enable the pressure of the pressure oil fluid to reach 50 Mpa, so that the requirements of test pressure of the imitative working condition can be met and accordingly the real working condition of the sealing parts of the hydraulic cylinder can be simulated.

Description

For the testing installation of test fluid cylinder pressure seal durability
Technical field
The present invention relates to the testing installation of Sealing, particularly, relate to a kind of testing installation for test fluid cylinder pressure seal durability.
Background technique
The quality of hydraulic cylinder sealing element durability directly affects the reliability of engineering machinery, therefore in the urgent need to hydraulic cylinder sealing element durability test machine.At present, domestic existing hydraulic cylinder sealing element testing machine can only carry out the sealability comparative trial of Sealing and the experiments of sealing performance of Part load parameter, the all operating modes of simulated solution cylinder pressure (pressure, speed, temperature parameter) test of seal durability can not be carried out, the result of test can not reflect hydraulic cylinder sealing element actual conditions comprehensively, and practical reference value is limited.
CN101315311A discloses a kind of energy-saving hydraulic sealing experimental bench, and as shown in Figure 1, this Laboratory Furniture forms by testing oil hydraulic cylinder, experiment Driven by Hydraulic Cylinder loop and loading loop three part.Experiment oil hydraulic cylinder is made up of left cylinder cap 2, left guide sleeve 3, cylinder barrel 5, piston 15, piston rod 9, right guide sleeve 19, right cylinder cap 20, wherein: piston 15, left guide sleeve 3 and right guide sleeve 19 are contained in cylinder barrel 5; The central position of the external cylindrical surface of piston has an annular groove, and have the first radial direction through hole a through this Pocket Machining, the multiple tracks annular groove for installing supporting ring and the first tested seal element 16 is all processed with in the both sides of this groove, first tested seal element 16 paired mounting is in groove both sides, piston rod 9 is processed with the radial hole b and axial bore c that are interconnected, and radial hole b is connected with the first radial direction through hole a on piston; The neutral position of left guide sleeve 3 endoporus cylndrical surface has an annular groove, and have the second radial direction through hole d through this Pocket Machining, all be processed with the multiple tracks annular groove for installing the first supporting ring 13 and the second tested seal element 14 in the both sides of this groove, the second tested seal element 14 paired mounting is in groove both sides.Experiment Driven by Hydraulic Cylinder loop is made up of elements such as variable displacement pump 23, safety valve 24, first filter 25, first solenoid directional control valves 22.Load loop and comprise metering pump 26, relief valve 27, second filter 29, second solenoid directional control valve 28, first accumulator 6, second accumulator 10 and stop valve.In addition, reference character 1 in this NM accompanying drawing 1 represents proximity detector, 4,7,8,11,21 represent the first stop valve, the second stop valve, the 3rd stop valve, the 4th stop valve and the 5th stop valve respectively, 18 represent the second supporting ring, 17 represent the 3rd tested seal element, and 12 represent the first dust ring.
The working procedure of this Laboratory Furniture is as follows: be first loaded on piston 15 and left and right guide sleeve 3,19 respectively by the first tested seal element 16 and tested seal element 14,17 before experiment; Stop valve 4,6,8,11,21 is all opened, pressure oil liquid is introduced in the annular groove of piston 15 and left and right guide sleeve 3,19 by operation solenoid directional control valve 28, and topping up is carried out to the first accumulator 6 and the second accumulator 10, when oil liquid pressure reaches setting value, stop valve 8,21 is closed, make the force value set by the maintenance of tested seal element by accumulator, at this moment, control the first solenoid directional control valve 22 and make piston 15 drive piston rod 9 to do axially reciprocating in cylinder barrel 5; Stop valve 7,8 or stop valve 11,21 are all closed, is detected the sealability of tested seal element by the change observing relevant pressure table instruction numerical value or indicated numerical value.
In addition, stop valve 7,11 is closed, other stop valve 4,8,21 is all opened, solenoid directional control valve 28 is made to be in meta, and according to the given time delay of automatical control system, make electromagnetic relief valve 27 constantly electric and dead electricity, then can carry out variable load shock test in short-term to tested seal element.
Moreover, by automatical control system, when making solenoid directional control valve 28 be in meta, test under all tested seal elements can be made to be in same induced pressure; When making solenoid directional control valve 28 be in left position or right position, the tested seal element at piston place can be made to be in different induced pressures from the tested seal element at piston rod place and to test.
The defect of above-mentioned energy-saving hydraulic sealing experimental bench is: the pressure that (1) loads loop is static or the impact of variable load in short-term, and the pressure loading loop cannot reach the stress level of real working condition, therefore this hydraulic sealing experimental bench cannot simulate the real working condition of hydraulic cylinder sealing element, and can only be carried out the sealability comparative trial of Sealing by the change observing relevant pressure table instruction numerical value or indicated numerical value; (2) owing to being carry out piston rod 9 by the hydraulic oil flowed in cylinder barrel 5 to do axially reciprocating, and the hydraulic oil flowed in cylinder barrel 5 may penetrate in the annular groove at tested seal element 14,16,17 place, thus affect the test of seal element sealability, so cause the conformity of test conditions bad, affect the accuracy of test result; (3) above-mentioned energy-saving hydraulic sealing experimental bench can not imitate the test that all operating modes of oil hydraulic cylinder (pressure, speed, temperature parameter) carry out seal durability; (4) by above-mentioned energy-saving hydraulic sealing experimental bench, can not the organization plan of optimization hydraulic cylinder sealing element, can not the related process parameters of optimization cylinder barrel and piston rod.
Summary of the invention
The object of this invention is to provide a kind of testing installation for test fluid cylinder pressure seal durability can simulating the real working condition of hydraulic cylinder sealing element.
To achieve these goals, the invention provides a kind of testing installation for test fluid cylinder pressure seal durability, this testing installation comprises tested oil hydraulic cylinder, for the driver element and the pressure oil liquid feeding unit that drive the piston rod of described tested oil hydraulic cylinder to do linear reciprocating motion, the first ring connected in star for laying piston seal and/or the second annular groove for laying piston rod seal component is provided with in described tested oil hydraulic cylinder, wherein, described pressure oil liquid feeding unit comprises pressurized cylinder, fuel tank and selector valve, the active chamber of described pressurized cylinder is connected with described fuel tank by described selector valve, the filler opening of the hyperbaric chamber of described pressurized cylinder is connected with described fuel tank, the oil outlet of the hyperbaric chamber of described pressurized cylinder is connected with described first ring connected in star and/or described second annular groove.
Preferably, the first oil pump and the first one-way valve is connected with between the pressure oil port of described selector valve and described fuel tank; The second one-way valve is connected with between the return opening of described selector valve and described fuel tank; The second oil pump and the 3rd one-way valve is connected with between the filler opening of the hyperbaric chamber of described pressurized cylinder and described fuel tank.
Preferably, the oil circuit between the pressure oil port of described selector valve and described fuel tank is oil-feed oil circuit, is connected with the first pressure gauge, accumulator and the first relief valve between described oil-feed oil circuit and described fuel tank.
Preferably, the second relief valve and the second pressure gauge is connected with between the repairing oil circuit between the filler opening of the hyperbaric chamber of described pressurized cylinder and described fuel tank and described fuel tank.
Preferably, pressure transducer is connected with between the oil outlet of the hyperbaric chamber of described pressurized cylinder and described first ring connected in star and/or described second annular groove.
Preferably, the first switch valve is connected with between the oil outlet of the hyperbaric chamber of described pressurized cylinder and described first ring connected in star and/or described second annular groove; Oil circuit between the oil outlet of the hyperbaric chamber of described pressurized cylinder and described first ring connected in star and/or described second annular groove is connected to described fuel tank by branch road of draining the oil, described in drain the oil on branch road and be connected with second switch valve.
Preferably, described pressure oil liquid feeding unit also comprises cooling unit, and the filler opening of this cooling unit is connected with described fuel tank respectively with oil outlet; Fine filter is connected with between described fuel tank and described cooling unit.
Preferably, described driver element is variable speed drive units.
Preferably, described tested oil hydraulic cylinder comprises the tested cylinder of piston rod seal component and the tested cylinder of piston seal, described driver element comprises shift drive mechanism, eccentric shaft, eccentric wheel, connecting rod, slide block, for support described eccentric shaft bearing support and for guiding the guiding pairs of the motion of described slide block, described shift drive mechanism is rotated for driving described eccentric shaft, described eccentric wheel is fixedly set on described eccentric shaft, one end of described connecting rod and described eccentric wheel pivot joint, the other end of described connecting rod and one end pivot joint of described slide block, the other end of described slide block is connected between the first piston bar of the tested cylinder of described piston rod seal component and the second piston rod of the tested cylinder of described piston seal.
Preferably, described driver element also comprises link, the two ends of this link are connected with the first piston bar of the tested cylinder of described piston rod seal component and the second piston rod of the tested cylinder of described piston seal respectively by pull pressure sensor, and described slide block is connected with described link.
Preferably, described link comprise main body and respectively with two bulbs of the two ends ball-joint of this main body, described two bulbs are connected with the first piston bar of the tested cylinder of described piston rod seal component and the second piston rod of the tested cylinder of described piston seal respectively by described pull pressure sensor, and described slide block is connected with the main body of described link.
Preferably, the tested cylinder of described piston rod seal component and the tested cylinder of piston seal are arranged respectively in pairs, described link is connected between the tested cylinder of corresponding described piston rod seal component and the tested cylinder of piston seal, described driver element also comprises coupling shaft, between the tested cylinder of described piston rod seal component that this coupling shaft is connected to setting in pairs and two described links of the tested cylinder of piston seal, described slide block is fixedly connected with described coupling shaft.
Preferably, described tested oil hydraulic cylinder comprises the tested cylinder of piston rod seal component and the tested cylinder of piston seal, wherein:
The tested cylinder of described piston rod seal component comprises first piston bar and guiding body, described guiding body is set on described first piston bar, the inner peripheral surface of described guiding body is provided with described second annular groove for laying described piston rod seal component, described piston rod seal component is used for the clearance seal between described first piston bar and described guiding body, described guiding body is provided with the first pressure oil liquid entrance be connected with the oil outlet of the hyperbaric chamber of described pressurized cylinder, this the first pressure oil liquid entrance communicates with the space between described first piston bar and described guiding body, the inside of described first piston bar is formed with the first space, described first piston bar is provided with the first temperature regulating liquid entrance of being all communicated with described first space and the first temperature regulating liquid exports,
The tested cylinder of described piston seal comprises the second piston rod and cylinder body, the cock body of described second piston rod is arranged in described cylinder body, the body of rod of described second piston rod stretches out from described cylinder body, the outer surface of described cock body is provided with the described first ring connected in star for laying described piston seal, described piston seal is used for the clearance seal between described cock body and described cylinder body, the described body of rod is provided with the second pressure oil liquid entrance be connected with the oil outlet of the hyperbaric chamber of described pressurized cylinder, this the second pressure oil liquid entrance communicates with the space between described cock body and described cylinder body, the outer surface of described cylinder body is provided with outside sandwich, second space is formed between this outside sandwich and described cylinder body, described outside sandwich is provided with the second temperature regulating liquid entrance and the outlet of the second temperature regulating liquid,
Described testing installation also comprises the liquid supply device for supplying temperature regulating liquid, the outlet of this liquid supply device is connected with described first temperature regulating liquid entrance and the second temperature regulating liquid entrance respectively, and the import of this liquid supply device exports with described first temperature regulating liquid respectively and the second temperature regulating liquid exports and is connected.
Preferably, described liquid supply device is cold-hot integrated machine.
Preferably, between the import of described liquid supply device and described first temperature regulating liquid export and the import of described liquid supply device and described second temperature regulating liquid export between be connected with the first temperature transducer.
Preferably, the bottom of described guiding body be provided be communicated with the inner space of described guiding body first leak and collect mouth; The bottom of described cylinder body be provided be communicated with the inner space of described cylinder body second leak and collect mouth.
In the present invention, the pressure of pressure oil liquid is improved by pressurized cylinder, the pressure of pressure oil liquid is enable to reach 50Mpa, meet the requirement of imitative working condition tests pressure, in addition, changed the trend of the hydraulic oil of the active chamber of pressurized cylinder by selector valve and change the size of the pressure being fed to the pressure oil liquid of described first ring connected in star and/or described second annular groove from hyperbaric chamber, thus provide imitative operating mode impulse test pressure oil liquid to first ring connected in star and/or the second annular groove, the real working condition of simulation hydraulic cylinder sealing element.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the structural representation of existing energy-saving hydraulic sealing experimental bench;
Fig. 2 is the schematic diagram of the hydraulic system of the testing installation for test fluid cylinder pressure seal durability provided by the invention;
Fig. 3 is the schematic front view of the mechanical structure portion of the testing installation for test fluid cylinder pressure seal durability provided by the invention;
Fig. 4 is the schematic top plan view of the mechanical structure portion of the testing installation for test fluid cylinder pressure seal durability provided by the invention;
Fig. 5 is the schematic side view of the mechanical structure portion of the testing installation for test fluid cylinder pressure seal durability provided by the invention;
Fig. 6 is the structural representation of the tested cylinder of piston rod seal component of the testing installation for test fluid cylinder pressure seal durability provided by the invention;
Fig. 7 is the structural representation of a kind of mode of execution of the tested cylinder of piston seal of the testing installation for test fluid cylinder pressure seal durability provided by the invention;
Fig. 8 is the structural representation of the another kind of mode of execution of the tested cylinder of piston seal of the testing installation for test fluid cylinder pressure seal durability provided by the invention.
Description of reference numerals
1: proximity detector; 2: left cylinder cap; 3: left guide sleeve; 4: the first stop valves; 5: cylinder barrel; 6: the first accumulators; 7: the second stop valves; 8: the three stop valves; 9: piston rod; 10: the second accumulators; 11: the four stop valves; 12: the first dust rings; 13: the first supporting rings; 14: the second tested seal elements; 15: piston; 16: the first tested seal elements; 17: the three tested seal elements; 18: the second supporting rings; 19: right guide sleeve; 20: right cylinder cap; 21: the five stop valves; 22: the first solenoid directional control valves; 23: variable displacement pump; 24: safety valve; 25: the first filters; 26: metering pump; 27: relief valve; 28: the second solenoid directional control valves; 29: the second filters; A: the first radial direction through hole; B: radial hole; C: axial bore; D: the second radial direction through hole; 30: liquid supply device; 31: the first temperature transducers; 100: driver element; 101: coupling shaft; 102: link; 103: eccentric shaft; 104: eccentric wheel; 105: slide block; 106: connecting rod; 107: bearing support; 108: guiding pairs; 109: the three abutments; 110: the four bearings; 111: pull pressure sensor; 112: variable speed electric motors, particularly; 113: speed reducer; 114: the first coupling; 115: the second coupling; 116: the first bearings; 117: the second bearings; 118: fixed base; 200: pressure oil liquid feeding unit; 201: pressurized cylinder; 202: fuel tank; 203: selector valve; 204: the first oil pumps; 205: the first one-way valves; 206: inlet oil filter; 207: the first pressure gauges; 208: accumulator; 209: the first relief valves; 210: the second oil pumps; 211: the three one-way valves; 212: the second relief valves; 213: the second pressure gauges; 214: pressure transducer; 215: the first switch valves; 216: branch road of draining the oil; 217: cooling unit; 218: fine filter; 219: the three switch valves; 220: the four switch valves; 221: the five switch valves; 222: liquid level liquid thermometer; 223: the second temperature transducers; 224: air-strainer; 225: liquid level relay; 226: second switch valve; 227: the second one-way valves; 228: return filter; 300: the tested cylinder of piston rod seal component; 301: piston rod seal component; 302: first piston bar; 303: guiding body; 304: the first pressure oil liquid entrances; 305: the first spaces; 306: the first temperature regulating liquid entrances; 307: the first temperature regulating liquid outlets; Leak collection mouth at 308: the first; 309: the three annular grooves; 310: pressure oil liquid supply passage; 311: the four annular grooves; 312: the first guidance tapes; 313: the second dust rings; 400: the tested cylinder of piston seal; 401: piston seal; 402: the second piston rods; 402a: cock body; 402b: the body of rod; 402c: boss; 403: cylinder body; 404: the second pressure oil liquid entrances; 405: outside sandwich; 406: the second temperature regulating liquid entrances; 407: the second temperature regulating liquid outlets; Leak collection mouth at 408: the second; 409: second space; 410: axial passage; 411: radial passage; 412: the five rings connected in stars; 413: nut; 414:O shape seal ring; 415: the second guidance tapes; 416: end cap; 500: stand; 501: panel; 502: base plate; 503: support frame; P: pressure oil port; T: return opening; A: the first actuator port; B: the second actuator port.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality of use is as normally undefined in the working state of the testing installation for test fluid cylinder pressure seal durability provided by the invention in " upper and lower ".
As shown in Figures 2 to 5, the invention provides a kind of testing installation for test fluid cylinder pressure seal durability, this testing installation comprises tested oil hydraulic cylinder, for the driver element 100 and the pressure oil liquid feeding unit 200 that drive the piston rod of described tested oil hydraulic cylinder to do linear reciprocating motion, the first ring connected in star for laying piston seal 401 and/or the second annular groove for laying piston rod seal component 301 is provided with in described tested oil hydraulic cylinder, wherein, described pressure oil liquid feeding unit 200 comprises pressurized cylinder 201, fuel tank 202 and selector valve 203, the active chamber of described pressurized cylinder 201 is connected with described fuel tank 202 by described selector valve 203, the filler opening of the hyperbaric chamber of described pressurized cylinder 201 is connected with described fuel tank 202, the oil outlet of the hyperbaric chamber of described pressurized cylinder 201 is connected with described first ring connected in star and/or described second annular groove.
Like this, the piston rod of tested oil hydraulic cylinder is driven to carry out in the process of linear reciprocating motion at driver element 100, imitative operating mode impulse test pressure oil liquid is provided to the first ring connected in star for laying piston seal 401 and/or the second annular groove for laying piston rod seal component 301 by pressure oil liquid feeding unit 200, particularly, the pressure of pressure oil liquid is improved by pressurized cylinder 201, the pressure of pressure oil liquid is enable to reach 50Mpa or required test pressure, meet the requirement of imitative working condition tests pressure, in addition, changed the trend of the hydraulic oil of the active chamber of pressurized cylinder 201 by selector valve 203 and change the size of the pressure being fed to the pressure oil liquid of described first ring connected in star and/or described second annular groove from hyperbaric chamber, thus provide imitative operating mode impulse test pressure oil liquid to first ring connected in star and/or the second annular groove, the real working condition of simulation hydraulic cylinder sealing element.
As shown in Figure 2, the cross-section area of the hyperbaric chamber of pressurized cylinder 201 is less than the cross-section area of the low-pressure cavity of pressurized cylinder 201, thus reaches the object improving oil liquid pressure in hyperbaric chamber.In addition, the to-and-fro motion of piston rod and the commutation of selector valve need keep synchronous, to realize the pulse-pressure to tested hydraulic cylinder sealing element, and can be carried out the interlock of control piston bar and selector valve by proximity switch, this kind of control mode is conventionally known to one of skill in the art, does not repeat them here.
Selector valve 203, for changing the trend of the hydraulic oil of the active chamber of pressurized cylinder 201, can take various suitable selector valve, such as, three-position four-way electromagnetic directional valve shown in Fig. 2.As shown in Figure 2, the pressure oil port P of selector valve 203 and oil return inlet T are connected to fuel tank 202 respectively, and the first actuator port A of selector valve 203 and the second actuator port B is connected to rod chamber in the active chamber of pressurized cylinder 201 and rodless cavity respectively.When this solenoid directional control valve is in left position in figure, hydraulic oil promotes piston rod and moves towards hyperbaric chamber, thus the pressure oil liquid in compression hyperbaric chamber, increase the pressure being fed to the pressure oil liquid of first ring connected in star and/or the second annular groove; When this solenoid directional control valve is in right position in figure, hydraulic oil promotes piston rod and moves away from hyperbaric chamber, thus discharges the pressure of the pressure oil liquid in hyperbaric chamber, reduces the pressure being fed to the pressure oil liquid of first ring connected in star and/or the second annular groove; When this solenoid directional control valve is in meta in figure, two active chambers of pressurized cylinder 201 are communicated with and hydraulic oil flow back in fuel tank 202, and pressure oil liquid feeding unit 200 quits work.
Preferably, the first oil pump 204 and the first one-way valve 205 is connected with between the pressure oil port P of described selector valve 203 and described fuel tank 202.Like this, the fluid in fuel tank 202 can be pumped into the pressure oil port P of selector valve 203 by the first oil pump 204; First one-way valve 205 is back in fuel tank 202 for preventing fluid.In addition, inlet oil filter 206 and the 3rd switch valve (such as ball valve) 219 is also connected with between the pressure oil port P of selector valve 203 and fuel tank 202.Inlet oil filter 206, for filtering the fluid of the pressure oil port P entering selector valve 203, enters in selector valve 203 to avoid impurity; 3rd switch valve 219 is for the break-make of oil circuit control easily.
Preferably, be connected with the second one-way valve 227 between the oil return inlet T of described selector valve 203 and described fuel tank 202, this second one-way valve 227 is for improving the commutation stability of pressurized cylinder 201.In addition, be also connected with return filter 228 between the oil return inlet T of described selector valve 203 and described fuel tank 202, this return filter 228 is for filtering the fluid be back in fuel tank 202.
Preferably, the second oil pump 210 and the 3rd one-way valve 211 is connected with between the filler opening of the hyperbaric chamber of described pressurized cylinder 201 and described fuel tank 202.Like this, the fluid in fuel tank 202 can be pumped in the hyperbaric chamber of pressurized cylinder 201 by the second oil pump 210, supplement fluid with the hyperbaric chamber intermittent to pressurized cylinder 201; 3rd one-way valve 211 is back in fuel tank 202 for preventing fluid.In addition, the 4th switch valve (such as ball valve) 220 between the filler opening of the hyperbaric chamber of pressurized cylinder 201 and fuel tank 202, is also connected with, with the break-make of oil circuit control easily.
Oil circuit between the pressure oil port P of described selector valve 203 and described fuel tank 202 is oil-feed oil circuit, and the oil circuit between the oil return inlet T of described selector valve 203 and described fuel tank 202 is oil return circuit.Preferably, the first pressure gauge 207, accumulator 208 and the first relief valve 209 is connected with between described oil-feed oil circuit and described fuel tank 202.Particularly, the first pressure gauge 207, accumulator 208 and the first relief valve 209 can be connected between the pressure oil port P of the selector valve 203 of oil-feed oil circuit and the first one-way valve 205, between the second one-way valve 227 of oil return circuit and return filter 228; First pressure gauge 207 can be arranged between accumulator 208 and the first relief valve 209.Like this, the oil liquid pressure of oil-feed oil circuit can be detected by the first pressure gauge 207, and reduce the fluctuation of oil circuit oil liquid pressure by accumulator 208 or by the first relief valve 209, the unnecessary fluid in oil-feed oil circuit overflowed back fuel tank 202, thus realize safety and the pressure adjustment of oil-feed oil circuit.In addition, the first relief valve 209 can take various suitable form, such as common relief valve or proportional pressure control valve, or the relief valve adopting these two kinds of forms.In addition, the 5th switch valve (such as ball valve) 221 can also be connected with between accumulator 208 and described oil-feed oil circuit, to control the break-make of accumulator 208 easily.
Preferably, the second relief valve 212 and the second pressure gauge 213 is connected with between the repairing oil circuit between the filler opening of the hyperbaric chamber of described pressurized cylinder 201 and described fuel tank 202 and described fuel tank 202.Particularly, the second relief valve 212 and the second pressure gauge 213 can be connected between the second oil pump 210 of repairing oil circuit and the 3rd one-way valve 211.Like this, the oil liquid pressure in repairing oil circuit can be detected by the second pressure gauge 213, by the second relief valve 212, the fluid in repairing oil circuit is overflowed back fuel tank 202 time too high with the oil liquid pressure in repairing oil circuit, thus make the oil liquid pressure of repairing oil circuit reach predetermined pressure.
In order to measure with the test pressure of pilot pressure fluid to the pressure of the pressure oil liquid being fed to described first ring connected in star and/or described second annular groove easily, preferably, pressure transducer 214 is connected with between the oil outlet of the hyperbaric chamber of described pressurized cylinder 201 and described first ring connected in star and/or described second annular groove.
Preferably, the first switch valve (such as ball valve) 215 is connected with between the oil outlet of the hyperbaric chamber of described pressurized cylinder 201 and described first ring connected in star and/or described second annular groove; Oil circuit between the oil outlet of the hyperbaric chamber of described pressurized cylinder 201 and described first ring connected in star and/or described second annular groove is connected to described fuel tank 202 by branch road 216 of draining the oil, described in drain the oil on branch road 216 and be connected with second switch valve (such as ball valve) 226.Like this, when the tested oil hydraulic cylinder of dismounting or when the oil feeding line between the oil outlet of the hyperbaric chamber of pressurized cylinder 201 and first ring connected in star and/or the second annular groove is overhauled, second switch valve 226 can be opened, fuel tank 202 is flowed back to make the fluid in tested oil hydraulic cylinder and oil feeding line, then the first switch valve 215 cuts out, thus facilitate the dismounting of tested oil hydraulic cylinder and the maintenance of oil feeding line.
Preferably, described pressure oil liquid feeding unit 200 also comprises cooling unit 217, and the filler opening of this cooling unit 217 is connected with described fuel tank 202 respectively with oil outlet; Fine filter 218 is connected with between described fuel tank 202 and described cooling unit 217.Like this, the oil temperature requirement of fluid in fuel tank 202 can be ensured by cooling unit 217, the turbidity test requirement of fluid in fuel tank 202 can be ensured by fine filter 218.Cooling unit 217 can suitably be selected, and such as cooling unit 217 can be oil cooling machine.
Fuel tank 202 can take various suitable structure, and such as, fuel tank 202 can comprise interconnective casing and cover plate.In addition, fuel tank 202 can also comprise liquid level liquid thermometer 222, second temperature transducer 223, air-strainer 224 and liquid level relay 225, and liquid level liquid thermometer 222, second temperature transducer 223, air-strainer 224 and liquid level relay 225 can be arranged on the cover plate of fuel tank 202.The concrete Placement of casing and cover plate is conventionally known to one of skill in the art, does not repeat them here.The concrete mounting type of liquid level liquid thermometer 222, second temperature transducer 223, air-strainer 224 and liquid level relay 225 is conventionally known to one of skill in the art, does not repeat them here.
Driver element 100 can suitably be selected.In order to can the movement velocity of hydraulic cylinder piston rod under Reality simulation operating mode, preferably, described driver element 100 be variable speed drive units.In the present invention, the movement velocity of tested hydraulic cylinder piston rod is set as 0-1m/s.
Driver element 100 can take various suitable structure.As shown in Figures 3 to 5, a preferred embodiment of the invention, described tested oil hydraulic cylinder comprises the tested cylinder of piston rod seal component 300 and the tested cylinder 400 of piston seal, described driver element 100 comprises shift drive mechanism, eccentric shaft 103, eccentric wheel 104, connecting rod 106, slide block 105, for support described eccentric shaft 103 bearing support 107 and for guiding the guiding pairs 108 of the motion of described slide block 105, described shift drive mechanism is rotated for driving described eccentric shaft 103, described eccentric wheel 104 is fixedly set on described eccentric shaft 103, one end of described connecting rod 106 and described eccentric wheel 104 pivot joint, the other end of described connecting rod 106 and one end pivot joint of described slide block 105, the other end of described slide block 105 is connected between the first piston bar 302 of the tested cylinder of described piston rod seal component 300 and the second piston rod 402 of the tested cylinder 400 of described piston seal.Like this, eccentric shaft 103 is driven to be rotated by shift drive mechanism, the rotary motion of eccentric shaft 103 is converted the straight line motion of slide block 105 to by eccentric wheel 104, connecting rod 106, slide block 105 and guiding pairs 108, and then drive the second piston rod 402 of the first piston bar 302 of the tested cylinder of described piston rod seal component 300 and the tested cylinder 400 of described piston seal to carry out straight line motion by slide block 105 simultaneously, test while realizing that operating mode durability is imitated to piston rod seal component 301 and piston seal 401.
In addition, be by above-mentioned mechanical driver element 100(instead of as prior art by the driver element of hydraulic type) the second piston rod 402 of the first piston bar 302 and the tested cylinder 400 of piston seal that carry out the tested cylinder of driven plunger shaft seal 300 carries out linear reciprocating motion, so the test of the sealability of piston rod seal component 301 and piston seal 401 can not be affected, thus the conformity of proof test condition and the accuracy of test result.
Preferably, described driver element 100 also comprises link 102, the two ends of this link 102 are connected with the first piston bar 302 of the tested cylinder of described piston rod seal component 300 and the second piston rod 402 of the tested cylinder 400 of described piston seal respectively by pull pressure sensor 111, and described slide block 105 is connected with described link 102.Like this, can be measured the surface friction drag of first piston bar 302 and the second piston rod 402 by pull pressure sensor 111, be conducive to optimizing the organization plan of hydraulic cylinder sealing element and the related process parameters of cylinder barrel and piston rod.Certain activity surplus is had in order to make link 102, link 102 is facilitated to drive the second piston rod 402 of the first piston bar 302 of the tested cylinder of piston rod seal component 300 and the tested cylinder 400 of piston seal to carry out straight line motion, preferably, described link 102 comprise main body (not shown) and respectively with two bulb (not shown)s of the two ends ball-joint of this main body, these two bulbs are connected with the first piston bar 302 of the tested cylinder of described piston rod seal component 300 and the second piston rod 402 of the tested cylinder 400 of described piston seal respectively by described pull pressure sensor 111, described slide block 105 is connected with the main body of described link 102.Particularly, pull pressure sensor 111 can be threaded with the second piston rod 402 of the first piston bar 302 of link 102, the tested cylinder of described piston rod seal component 300 and the tested cylinder 400 of described piston seal.
In order to can measure the tested cylinder of many cover piston rod seal components 300 and the tested cylinder 400 of piston seal simultaneously, preferably, the tested cylinder of described piston rod seal component 300 and the tested cylinder 400 of piston seal are arranged respectively in pairs, described link 102 is connected between the tested cylinder of corresponding described piston rod seal component 300 and the tested cylinder 400 of piston seal, described driver element 100 also comprises coupling shaft 101, between the tested cylinder of described piston rod seal component 300 that this coupling shaft 101 is connected to setting in pairs and two described links 102 of the tested cylinder of piston seal 400, described slide block 105 is fixedly connected with described coupling shaft 101.Coupling shaft 101 can pass through fastening piece (such as locating stud, bolt etc.) and be fixedly connected with link 102, and coupling shaft 101 is connected to the middle part of link 102 usually.Slide block 105 can be connected to the middle part of coupling shaft 101, and slide block 105 can pass through fastening piece (such as locating stud, bolt etc.) is fixedly connected with coupling shaft 101.
In addition, as shown in Figure 2, pressure oil liquid can be fed to the tested cylinder of each piston rod seal component 300 and the tested cylinder 400 of piston seal by many (being four (C0, C1, C2, C3) in the embodiment shown in figure 2) fuel feeding branch roads by the oil outlet of the hyperbaric chamber of the pressurized cylinder 201 of pressure oil liquid feeding unit 200.
Described shift drive mechanism can suitably be selected.In order to control the speed of shift drive mechanism easily, preferably, described shift drive mechanism comprises the variable speed electric motors, particularly 112 and speed reducer 113 that are mutually in transmission connection.Variable speed electric motors, particularly 112 such as can be connected with speed reducer 113 by the first coupling 114, and speed reducer 113 can be connected with eccentric shaft 103 by the second coupling 115 then.In process of the test, the rotating speed of variable speed electric motors, particularly 112 can be regulated by electrical control system, thus realize the test speed that operating mode 0-1m/s imitated by the tested cylinder of piston rod seal component 300 and the tested cylinder 400 of piston seal.
As shown in Figures 3 to 5, eccentric wheel 104 can be two, and can be fixedly set on two eccentric shafts 103 by fastening piece, and connecting rod 106 is arranged between two eccentric wheels 104.Bearing support 107 is two, to provide stable support to eccentric shaft 103.
In addition, guiding pairs 108 can take various suitable structure, as long as can guide shoe 105, slide block 105 be made to drive the second piston rod 402 of the first piston bar 302 of the tested cylinder of described piston rod seal component 300 and the tested cylinder 400 of described piston seal to carry out linear reciprocating motion.
In addition, the conveniently installation of tested oil hydraulic cylinder and driver element 100, preferably, the testing installation for test fluid cylinder pressure seal durability provided by the invention also comprises stand 500, and described tested oil hydraulic cylinder and driver element 100 are arranged on described stand 500.Conveniently arrange, as shown in Figures 3 to 5, preferably, described stand 500 comprises panel 501, base plate 502 and the support frame 503 for being fixedly connected with described panel 501 and base plate 502, the tested cylinder of described piston rod seal component 300, the tested cylinder of piston seal 400 and guiding pairs 108 are arranged on described panel 501, and described shift drive mechanism (such as variable speed electric motors, particularly 112 and speed reducer 113) and bearing support 107 are arranged on described base plate 502.Panel 501, base plate 502 and support frame 503 can be mutually permanently connected by the mode of welding.The tested cylinder 300 of piston rod seal component can be arranged on panel 501 by the first bearing 116, and the tested cylinder 400 of piston seal can be arranged on panel 501 by the second bearing 117, and guiding pairs 108 can be arranged on panel 501 by fixed base 118.Variable speed electric motors, particularly 112 can be arranged on base plate 502 by three abutments 109, and speed reducer 113 can be arranged on base plate 502 by the 4th bearing 110, and bearing support 107 can be arranged on base plate 502 by the mode being fastenedly connected or welding.The concrete mounting type of the tested cylinder of piston rod seal component 300, the tested cylinder of piston seal 400, guiding pairs 108, variable speed electric motors, particularly 112 and speed reducer 113 is conventionally known to one of skill in the art, does not repeat them here.
As mentioned above, described tested oil hydraulic cylinder can comprise the tested cylinder of piston rod seal component 300 and the tested cylinder 400 of piston seal.
As shown in Figure 6, a preferred embodiment of the invention, the tested cylinder 300 of described piston rod seal component comprises first piston bar 302 and guiding body 303, described guiding body 303 is set on described first piston bar 302, the inner peripheral surface of described guiding body 303 is provided with described second annular groove for laying described piston rod seal component 301, described piston rod seal component 301 is for by the clearance seal between described first piston bar 302 and described guiding body 303, described guiding body 303 is provided with the first pressure oil liquid entrance 304 be connected with the oil outlet of the hyperbaric chamber of described pressurized cylinder 201, this the first pressure oil liquid entrance 304 communicates with the space between described first piston bar 302 and described guiding body 303, the inside of described first piston bar 302 is formed with the first space 305, described first piston bar 302 is provided with the first temperature regulating liquid entrance 306 of being all communicated with described first space 305 and the first temperature regulating liquid exports 307.
As shown in Figure 7 and Figure 8, a preferred embodiment of the invention, the tested cylinder 400 of described piston seal comprises the second piston rod 402 and cylinder body 403, the cock body 402a of described second piston rod 402 is arranged in described cylinder body 403, the body of rod 402b of described second piston rod 402 stretches out from described cylinder body 403, the outer surface of described cock body 402a is provided with the described first ring connected in star for laying described piston seal 401, described piston seal 401 is for by the clearance seal between described cock body 402a and described cylinder body 403, described body of rod 402b is provided with the second pressure oil liquid entrance 404 be connected with the oil outlet of the hyperbaric chamber of described pressurized cylinder 201, this the second pressure oil liquid entrance 404 communicates with the space between described cock body 402a and described cylinder body 403, the outer surface of described cylinder body 403 is provided with outside sandwich 405, second space 409 is formed between this outside sandwich 405 and described cylinder body 403, described outside sandwich 405 is provided with the second temperature regulating liquid entrance 406 and the second temperature regulating liquid outlet 407.
As shown in Figure 2, described testing installation also comprises the liquid supply device 30 for supplying temperature regulating liquid, the outlet of this liquid supply device 30 is connected with described first temperature regulating liquid entrance 306 and the second temperature regulating liquid entrance 406 respectively, the import of this liquid supply device 30 export with described first temperature regulating liquid respectively 307 and second temperature regulating liquid export 407 and be connected.In the embodiment shown in figure 2, four road B0, B1, B2, B3 are arranged in the outlet of liquid supply device 30, are connected respectively with the temperature regulating liquid entrance pipeline of four tested cylinders; Four road A0, A1, A2, A3 are arranged in the import of liquid supply device 30, are connected respectively with the temperature regulating liquid outlet pipeline of four tested cylinders, form each tested cylinder circulating temperature-regulating loop.
According to the tested cylinder 300 of the piston rod seal component of above-mentioned preferred implementation, liquid supply device 30 can be utilized in the first space 305 that the inside of first piston bar 302 is formed to pass into temperature regulating liquid to change the test ambient temperature of tested oil hydraulic cylinder, thus the operating ambient temperature of Reality simulation operating mode.In addition, above-mentioned method of temperature control can adapt to various test ambient temperature, the restriction of the ambient temperature that is not put to the test, so test variety range is comparatively wide, applicability is good, and without the need to increasing experimentation cost.Moreover above-mentioned method of temperature control energy loss is less, temperature adjustment is quick, temperature stabilization, and can the stability of proof test condition and test efficiency.
According to the tested cylinder 400 of the piston seal of above-mentioned preferred implementation, temperature regulating liquid is passed into change the test ambient temperature of tested oil hydraulic cylinder in the second space 409 that liquid supply device 30 can be utilized to be formed between outside sandwich 405 and cylinder body 403, thus the operating ambient temperature of Reality simulation operating mode.In addition, above-mentioned method of temperature control can adapt to various test ambient temperature, the restriction of the ambient temperature that is not put to the test, so test variety range is comparatively wide, applicability is good, and without the need to increasing experimentation cost.Moreover above-mentioned method of temperature control energy loss is less, temperature adjustment is quick, temperature stabilization, and can the stability of proof test condition and test efficiency.
Liquid supply device 30 can be cold-hot integrated machine, thus temperature required liquid can be supplied to the tested cylinder of piston rod seal component 300 and the tested cylinder of piston seal 400 easily, that is, both can the higher liquid of supply temperature, also can the lower liquid of supply temperature.
Described temperature regulating liquid can be various liquid, such as water or fluid.
In order to measure with Control experiment ambient temperature to the temperature of the temperature regulating liquid in the tested cylinder of piston rod seal component 300 and the tested cylinder 400 of piston seal easily, preferably, described liquid supply device 30 import and described first temperature regulating liquid exports between 307 and the import of described liquid supply device 30 and described second temperature regulating liquid export 407 between be connected with the first temperature transducer 31.
Other preferred following structural features of the tested cylinder of piston rod seal component 300.
In order to collect the pressure oil liquid leaked via piston rod seal component 301 in guiding body 303 easily, to analyze the durability of piston rod seal component 301 and to carry out comparative trial, and directly perceived, quantitative measurment can be realized to letting out in tested piston rod seal component 301, preferably, the bottom of described guiding body 303 be provided be communicated with the inner space of described guiding body 303 first leak and collect mouth 308.First set-up mode leaking collection mouth 308 is conventionally known to one of skill in the art, does not repeat them here.In the embodiment shown in fig. 6, it is two that mouth 308 is collected in first leakage, these two first leak and collect mouth 308 and be separately positioned on both sides for two the second annular grooves laying piston rod seal component 301, thus collect the pressure oil liquid leaked by two piston rod seal components 301 respectively.Collect mouth 308 to easily the pressure oil liquid of leakage is directed to the first leakage, preferably, the inner peripheral surface of described guiding body 303 is provided with the 3rd annular groove 309 leaking with described first and collect mouth 308 and be communicated with.
In order to the test ambient temperature of tested oil hydraulic cylinder can be regulated equably, and facilitate the setting of the first temperature regulating liquid entrance 306 and the first temperature regulating liquid outlet 307, preferably, described first space 305 is run through described first piston bar 302 along the axial direction of described first piston bar 302 and is formed, and described first temperature regulating liquid entrance 306 and the first temperature regulating liquid outlet 307 are separately positioned on the two ends of described first piston bar 302.In addition, the outer surface at the two ends of first piston bar 302 is provided with screw thread, to be connected with the import and export of the liquid supply device 30 for supplying temperature regulating liquid easily.
Preferably, described second annular groove is two.Like this, two identical or different piston rod seal components 301 can be installed in two the second annular grooves.When two piston rod seal components 301 are different, comparative trial can be carried out.
Pressure oil liquid can flow to the second annular groove for laying piston rod seal component 301 to test the durability of piston rod seal component 301 by various suitable mode.A preferred embodiment of the invention, described guiding body 303 is provided with the pressure oil liquid supply passage 310 that the radial direction along this guiding body 303 extends and the 4th annular groove 311 be communicated with this pressure oil liquid supply passage 310, wherein: two described second annular grooves lay respectively at the both sides of described 4th annular groove 311, described first pressure oil liquid entrance 304 is communicated with described pressure oil liquid supply passage 310, described pressure oil liquid supply passage 310 is communicated with the space between described first piston bar 302 and described guiding body 303 by described 4th annular groove 311.4th annular groove 311 need not be too wide, and the width of such as the 4th annular groove 311 can be 10 millimeters.Like this, be present in the less space between two tested piston rod seal components 301 owing to only having the hydraulic oil of seldom amount in process of the test, so effectively on the impact of test conditions, can greatly improve the correctness of test result by deaeration in process of the test.In addition, a large amount of hydraulic oil is not needed owing to only needing to supply a small amount of hydraulic oil by the first pressure oil liquid entrance 304 to the 4th annular groove 311 during test, so in the disassembly process of testing installation of the present invention, in the Renewal process of Sealing and effectively can reduce the pollution of hydraulic oil to environment in process of the test, greatly improve the working environment of tester.
For the ease of guiding first piston bar 302, preferably, the first guidance tape 312 is provided with between the outer surface of described first piston bar 302 and the inner peripheral surface of described guiding body 303.In the embodiment shown in fig. 6, the first guidance tape 312 is two, and these two the first guidance tapes 312 are separately positioned between two described second annular grooves and the 4th annular groove.Particularly, annular groove can be set in the inner peripheral surface of guiding body 303, and the first guidance tape 312 is arranged in this annular groove.
Preferably, between the inner peripheral surface at the two ends of described guiding body 303 and the outer surface of described first piston bar 302, be provided with the second dust ring 313, thus prevent outside dust from entering into the space of leading between body 303 and first piston bar 302.Particularly, annular groove can be set in the inner peripheral surface of guiding body 303, and the second dust ring 313 is arranged in this annular groove.
Other preferred following structural features of the tested cylinder of piston seal 400.
In order to collect the pressure oil liquid leaked in cylinder body 403 via piston seal 401 easily, to analyze the durability of piston seal 401 and to carry out comparative trial, and directly perceived, quantitative measurment can be realized to letting out in tested piston seal 401, preferably, the bottom of described cylinder body 403 be provided be communicated with the inner space of described cylinder body 403 second leak and collect mouth 408.Second set-up mode leaking collection mouth 408 is conventionally known to one of skill in the art, does not repeat them here.In the mode of execution shown in Fig. 7 and Fig. 8, it is two that mouth 408 is collected in second leakage, these two second leak and collect mouth 408 and be separately positioned on both sides for two the first ring connected in stars laying piston seal 401, thus collect the pressure oil liquid leaked by two piston seals 401 on two cock body 402a respectively.
Preferably, described first ring connected in star is two.Like this, two piston seals 401 can be laid in two first ring connected in stars to test.Two piston seals 401 can be identical Sealing, also can be different Sealings.When two piston seals 401 are different Sealings, comparative trial can be carried out.
Pressure oil liquid can flow to first ring connected in star for laying piston seal 401 to test the durability of piston seal 401 by various suitable mode.A preferred embodiment of the invention, the five rings connected in star 412 described second piston rod 402 being provided with axial passage 410, radial passage 411 and being communicated with this radial passage 411, wherein: two described first ring connected in stars lay respectively at the both sides of described five rings connected in star 412, described second pressure oil liquid entrance 404 is communicated with described axial passage 410, described axial passage 410 is communicated with described radial passage 411, and described radial passage 411 is communicated with the space between described cock body 402a and described cylinder body 403 by described five rings connected in star 412.Axial passage 410 is arranged on the central position of the second piston rod 402 usually.Five rings connected in star 412 need not be too wide, and the width of such as five rings connected in star 412 can be 10 millimeters.Like this, be present in the less space between two tested piston seals 401 owing to only having the hydraulic oil of seldom amount in process of the test, so effectively on the impact of test conditions, can greatly improve the correctness of test result by deaeration in process of the test.In addition, a large amount of hydraulic oil is not needed owing to only needing to supply a small amount of hydraulic oil by the second pressure oil liquid entrance 404 to five rings connected in star 412 during test, so in the disassembly process of testing installation of the present invention, in the Renewal process of Sealing and effectively can reduce the pollution of hydraulic oil to environment in process of the test, greatly improve the working environment of tester.
The cock body 402a of the second piston rod 402 and body of rod 402b can be monolithic construction, also can be split-type structural.In the embodiment shown in figure, the cock body 402a of the second piston rod 402 and body of rod 402b is formed as monolithic construction.In the mode of execution shown in Fig. 8, cock body 402a and the body of rod 402b of the second piston rod 402 are formed as split-type structural.As shown in Figure 8, the second piston rod 402 comprises two cock body 402a and body of rod 402b, two cock body 402a to be enclosed within body of rod 402b and backstop on the boss 402c of body of rod 402b, and to be locked by nut 413.In addition, in order to prevent fluid from the clearance leakage between body of rod 402b and cock body 402a, between body of rod 402b and cock body 402a, O-ring seals 414 is also provided with.
For the ease of guiding the second piston rod 402, preferably, the second guidance tape 415 is provided with between the outer surface of described cock body 402a and the inner peripheral surface of described cylinder body 403.In the mode of execution shown in Fig. 7 and Fig. 8, the both sides for the described first ring connected in star laying described piston seal 401 are provided with described second guidance tape 415.Particularly, annular groove can be set on the outer surface of cock body 402a, and the second guidance tape 415 is arranged in this annular groove.
In order to limit the movement position of cock body 402a easily, preferably, the two ends of described cylinder body 403 are removably connected with end cap 416 respectively, and this end cap 416 is inserted in described cylinder body 403 to limit the movement position of described cock body 402a.The mode that end cap 416 such as can be threaded connection is connected to the two ends of cylinder body 403.
In order to heat cylinder body 403 equably or cool, with the test ambient temperature of simulated solution cylinder pressure more truly, preferably, described outside sandwich 405 is arranged around described cylinder body 403.Outside sandwich 405 can be arranged on the outer surface of cylinder body 403 by various suitable mode, and such as outside sandwich 405 can be welded on the outer surface of cylinder body 403.In addition, outside sandwich 405 can adopt various suitable material, such as metallic material.
A preferred embodiment of the invention, described second temperature regulating liquid entrance 406 and the second temperature regulating liquid outlet 407 are separately positioned on the bottom of described outside sandwich 405 and top and axial direction along described cylinder body 403 is spaced apart.Particularly, as shown in Figure 7 and Figure 8, the second temperature regulating liquid entrance 406 and the second temperature regulating liquid outlet 407 are probably arranged on the diagonally opposing corner position of outside sandwich 405.Like this, the flow path of temperature regulating liquid can be increased, more equably the outer surface of cylinder body 403 be heated.
In addition, the testing installation for test fluid cylinder pressure seal durability provided by the invention also comprises electrical control system, and the formation of this electrical control system is conventionally known to one of skill in the art.Such as, this electrical control system can be made up of forceful electric power, weakness control section, be mainly used in realizing the electrical control for the testing installation of test fluid cylinder pressure seal durability, the setting of test parameters, the collection of data-signal and process, the display of test pressure, speed, temperature and test number (TN), and test pressure-time graph, the display of surface friction drag-time graph, storage and output print.
In addition, in the present invention, the structure of each hydraulic element and annexation are conventionally known to one of skill in the art, do not repeat them here.
As shown in Fig. 2 to Fig. 8, the testing installation for test fluid cylinder pressure seal durability that the specific embodiment of the invention provides operationally, pass into pressure oil liquid by pressure oil liquid feeding unit 200 respectively to the second annular groove of the tested cylinder of piston rod seal component 300 and the first ring connected in star of the tested cylinder 400 of piston seal, and measured by the pressure of pressure transducer 214 pairs of pressure oil liquids; By driver element 100, the first piston bar 302 of the tested cylinder of driven plunger shaft seal 300 and the second piston rod 402 of the tested cylinder 400 of piston seal do linear reciprocating motion respectively; Temperature regulating liquid is passed into respectively in the second space 409 in the first space 305 of the first piston bar 302 of the tested cylinder of piston rod seal component 300 and between the outside sandwich 405 of the tested cylinder 400 of piston seal and cylinder body 403 by liquid supply device 30, thus change the test ambient temperature of tested oil hydraulic cylinder, and measured by the temperature of the first temperature transducer 31 to the temperature regulating liquid flowed out from the first space 305 and second space 409.In addition, in process of the test, can be measured by the surface friction drag of pull pressure sensor 111 pairs of first piston bars 302 and the second piston rod 402.Moreover, in process of the test, collection mouth 308 and second can be leaked by first and leak collection mouth 408 respectively to leaking via piston rod seal component 301 at the fluid led in body 303 and collecting via the fluid that piston seal 401 leaks in cylinder body 403, to analyze the durability of piston rod seal component 301 and piston seal 401 and to carry out comparative trial.
The testing installation for test fluid cylinder pressure seal durability that the specific embodiment of the invention provides possesses following advantage:
(1) pressure of pressure oil liquid can be improved by pressurized cylinder 201, the pressure of pressure oil liquid is enable to reach 50Mpa or the pressure needed for test, meet the requirement of imitative working condition tests pressure, in addition, changed the trend of the hydraulic oil of the active chamber of pressurized cylinder 201 by selector valve 203 and change the size of the pressure being fed to the pressure oil liquid of described first ring connected in star and/or described second annular groove from hyperbaric chamber, realize the oil liquid pressure high-low cycle change of pressurized cylinder hyperbaric chamber, thus provide imitative operating mode impulse test pressure oil liquid to first ring connected in star and/or the second annular groove, the real working condition of simulation hydraulic cylinder sealing element,
(2) be by above-mentioned mechanical driver element 100(instead of as prior art by the driver element of hydraulic type) the second piston rod 402 of the first piston bar 302 and the tested cylinder 400 of piston seal that carry out the tested cylinder of driven plunger shaft seal 300 carries out linear reciprocating motion, so the test of the sealability of piston rod seal component 301 and piston seal 401 can not be affected, thus the conformity of proof test condition and the accuracy of test result;
(3) testing installation for test fluid cylinder pressure seal durability that the specific embodiment of the invention provides can imitate all operating modes of oil hydraulic cylinder (pressure of pressure oil liquid, the movement velocity of hydraulic cylinder piston rod, test ambient temperature parameter) to carry out Sealing and imitates that operating mode durability is qualitative, quantitative test, detects the actual life of hydraulic cylinder sealing element;
(4) the tested cylinder 300 of piston rod seal component according to the preferred embodiment of the present invention, liquid supply device 30 can be utilized in the first space 305 that the inside of first piston bar 302 is formed to pass into temperature regulating liquid to change the test ambient temperature of tested oil hydraulic cylinder, thus the operating ambient temperature of Reality simulation operating mode; The tested cylinder 400 of piston seal according to the preferred embodiment of the present invention, temperature regulating liquid is passed into change the test ambient temperature of tested oil hydraulic cylinder in the second space 409 that liquid supply device 30 can be utilized to be formed between outside sandwich 405 and cylinder body 403, thus the operating ambient temperature of Reality simulation operating mode; In addition, above-mentioned method of temperature control can adapt to various test ambient temperature, the restriction of the ambient temperature that is not put to the test, so test variety range is comparatively wide, applicability is good, and without the need to increasing experimentation cost; Moreover above-mentioned method of temperature control energy loss is less, temperature adjustment is quick, temperature stabilization, and can the stability of proof test condition and test efficiency;
(5) can be measured the surface friction drag of first piston bar 302 and the second piston rod 402 by pull pressure sensor 111; Collecting mouth 408 by the first leakage collection mouth 308 and the second leakage can respectively to leaking via piston rod seal component 301 at the fluid led in body 303 and collecting via the fluid that piston seal 401 leaks in cylinder body 403, thus quantitative measurment is carried out to the leakage of piston rod seal component 301 and piston seal 401, thus be conducive to optimizing the hydraulic cylinder sealing element that meets engineering machinery working condition requirement and be conducive to optimizing the organization plan of hydraulic cylinder sealing element and the related process parameters of cylinder barrel and piston rod, and then extend the working life of oil hydraulic cylinder.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.

Claims (14)

1. the testing installation for test fluid cylinder pressure seal durability, this testing installation comprises tested oil hydraulic cylinder, for the driver element (100) and the pressure oil liquid feeding unit (200) that drive the piston rod of described tested oil hydraulic cylinder to do linear reciprocating motion, the first ring connected in star for laying piston seal (401) and/or the second annular groove for laying piston rod seal component (301) is provided with in described tested oil hydraulic cylinder, it is characterized in that, described pressure oil liquid feeding unit (200) comprises pressurized cylinder (201), fuel tank (202) and selector valve (203), the active chamber of described pressurized cylinder (201) is connected with described fuel tank (202) by described selector valve (203), the first oil pump (204) is provided with between the pressure oil port (P) of described selector valve (203) and described fuel tank (202), the filler opening of the hyperbaric chamber of described pressurized cylinder (201) is connected with described fuel tank (202), the oil outlet of the hyperbaric chamber of described pressurized cylinder (201) is connected with described first ring connected in star and/or described second annular groove,
Wherein, described driver element (100) is variable speed drive units;
Described tested oil hydraulic cylinder comprises the tested cylinder of piston rod seal component (300) and the tested cylinder of piston seal (400), described driver element (100) comprises shift drive mechanism, eccentric shaft (103), eccentric wheel (104), connecting rod (106), slide block (105), for support described eccentric shaft (103) bearing support (107) and for guiding the guiding pairs (108) of the motion of described slide block (105), described shift drive mechanism is rotated for driving described eccentric shaft (103), described eccentric wheel (104) is fixedly set on described eccentric shaft (103), one end of described connecting rod (106) and described eccentric wheel (104) pivot joint, the other end of described connecting rod (106) and one end pivot joint of described slide block (105), the other end of described slide block (105) is connected between the first piston bar (302) of the tested cylinder of described piston rod seal component (300) and second piston rod (402) of the tested cylinder of described piston seal (400).
2. the testing installation for test fluid cylinder pressure seal durability according to claim 1, it is characterized in that, between the pressure oil port (P) of described selector valve (203) and described fuel tank (202), be connected with the first one-way valve (205); The second one-way valve (227) is connected with between the return opening (T) of described selector valve (203) and described fuel tank (202); The second oil pump (210) and the 3rd one-way valve (211) is connected with between the filler opening of the hyperbaric chamber of described pressurized cylinder (201) and described fuel tank (202).
3. the testing installation for test fluid cylinder pressure seal durability according to claim 2, it is characterized in that, oil circuit between the pressure oil port (P) of described selector valve (203) and described fuel tank (202) is oil-feed oil circuit, is connected with the first pressure gauge (207), accumulator (208) and the first relief valve (209) between described oil-feed oil circuit and described fuel tank (202).
4. the testing installation for test fluid cylinder pressure seal durability according to claim 2, it is characterized in that, the repairing oil circuit between the filler opening of the hyperbaric chamber of described pressurized cylinder (201) and described fuel tank (202) and be connected with the second relief valve (212) and the second pressure gauge (213) between described fuel tank (202).
5. the testing installation for test fluid cylinder pressure seal durability according to claim 1, it is characterized in that, between the oil outlet of the hyperbaric chamber of described pressurized cylinder (201) and described first ring connected in star and/or described second annular groove, be connected with pressure transducer (214).
6. the testing installation for test fluid cylinder pressure seal durability according to claim 1, it is characterized in that, between the oil outlet of the hyperbaric chamber of described pressurized cylinder (201) and described first ring connected in star and/or described second annular groove, be connected with the first switch valve (215); Oil circuit between the oil outlet of the hyperbaric chamber of described pressurized cylinder (201) and described first ring connected in star and/or described second annular groove is connected to described fuel tank (202) by branch road of draining the oil (216), described in drain the oil on branch road (216) and be connected with second switch valve (226).
7. the testing installation for test fluid cylinder pressure seal durability according to claim 1, it is characterized in that, described pressure oil liquid feeding unit (200) also comprises cooling unit (217), and the filler opening of this cooling unit (217) is connected with described fuel tank (202) respectively with oil outlet; Fine filter (218) is connected with between described fuel tank (202) and described cooling unit (217).
8. the testing installation for test fluid cylinder pressure seal durability according to claim 1, it is characterized in that, described driver element (100) also comprises link (102), one end of this link (102) is connected with the first piston bar (302) of the tested cylinder of described piston rod seal component (300) by pull pressure sensor (111), the other end of described link (102) is also connected with second piston rod (402) of the tested cylinder of described piston seal (400) by pull pressure sensor (111), described slide block (105) is connected with described link (102).
9. the testing installation for test fluid cylinder pressure seal durability according to claim 8, it is characterized in that, described link (102) comprise main body and respectively with two bulbs of the two ends ball-joint of this main body, two described bulbs connect with the first piston bar (302) of the corresponding tested cylinder of described piston rod seal component (300) and second piston rod (402) of the tested cylinder of described piston seal (400) respectively by described pull pressure sensor (111), described slide block (105) is connected with the main body of described link (102).
10. the testing installation for test fluid cylinder pressure seal durability according to claim 8, it is characterized in that, the tested cylinder of described piston rod seal component (300) and the tested cylinder of piston seal (400) are arranged respectively in pairs, described link (102) is connected between the tested cylinder of corresponding described piston rod seal component (300) and the tested cylinder of piston seal (400), described driver element (100) also comprises coupling shaft (101), between the tested cylinder of described piston rod seal component (300) that this coupling shaft (101) is connected to setting in pairs and two described links (102) of the tested cylinder of piston seal (400), described slide block (105) is fixedly connected with described coupling shaft (101).
11. testing installations for test fluid cylinder pressure seal durability according to claim 1, is characterized in that, described tested oil hydraulic cylinder comprises the tested cylinder of piston rod seal component (300) and the tested cylinder of piston seal (400), wherein:
The tested cylinder of described piston rod seal component (300) comprises first piston bar (302) and guiding body (303), described guiding body (303) is set on described first piston bar (302), the inner peripheral surface of described guiding body (303) is provided with described second annular groove for laying described piston rod seal component (301), described piston rod seal component (301) is for by the clearance seal between described first piston bar (302) and described guiding body (303), described guiding body (303) is provided with the first pressure oil liquid entrance (304) be connected with the oil outlet of the hyperbaric chamber of described pressurized cylinder (201), this the first pressure oil liquid entrance (304) communicates with the space between described first piston bar (302) and described guiding body (303), the inside of described first piston bar (302) is formed with the first space (305), described first piston bar (302) is provided with the first temperature regulating liquid entrance (306) of being all communicated with described first space (305) and the first temperature regulating liquid exports (307),
The tested cylinder of described piston seal (400) comprises the second piston rod (402) and cylinder body (403), the cock body (402a) of described second piston rod (402) is arranged in described cylinder body (403), the body of rod (402b) of described second piston rod (402) stretches out from described cylinder body (403), the outer surface of described cock body (402a) is provided with the described first ring connected in star for laying described piston seal (401), described piston seal (401) is for by the clearance seal between described cock body (402a) and described cylinder body (403), the described body of rod (402b) is provided with the second pressure oil liquid entrance (404) be connected with the oil outlet of the hyperbaric chamber of described pressurized cylinder (201), this the second pressure oil liquid entrance (404) communicates with the space between described cock body (402a) and described cylinder body (403), the outer surface of described cylinder body (403) is provided with outside sandwich (405), second space (409) is formed between this outside sandwich (405) and described cylinder body (403), described outside sandwich (405) is provided with the second temperature regulating liquid entrance (406) and the second temperature regulating liquid outlet (407),
Described testing installation also comprises the liquid supply device (30) for supplying temperature regulating liquid, the outlet of this liquid supply device (30) is connected with described first temperature regulating liquid entrance (306) and the second temperature regulating liquid entrance (406) respectively, and the import of this liquid supply device (30) exports (307) and the second temperature regulating liquid respectively and exports (407) and be connected with described first temperature regulating liquid.
12. testing installations for test fluid cylinder pressure seal durability according to claim 11, is characterized in that, described liquid supply device (30) is cold-hot integrated machine.
13. testing installations for test fluid cylinder pressure seal durability according to claim 11, it is characterized in that, the import of described liquid supply device (30) and described first temperature regulating liquid export between (307) and the import of described liquid supply device (30) and described second temperature regulating liquid export between (407) and be connected with the first temperature transducer (31).
14. testing installations for test fluid cylinder pressure seal durability according to claim 11, it is characterized in that, the bottom of described guiding body (303) be provided be communicated with the inner space of described guiding body (303) first leak and collect mouth (308); The bottom of described cylinder body (403) be provided be communicated with the inner space of described cylinder body (403) second leak and collect mouth (408).
CN201310351494.3A 2013-08-13 2013-08-13 Testing device for testing durability of sealing parts of hydraulic cylinder CN103410810B (en)

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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103645042B (en) * 2013-12-17 2016-02-24 中国北方发动机研究所(天津) A kind of piston high cycle machinery fatigue test device
CN103967869B (en) * 2014-05-12 2017-06-13 三一汽车制造有限公司 A kind of hydraulic cylinder loads detection means
CN103954413B (en) * 2014-05-14 2016-07-20 武汉理工大学 Hydraulic cylinder movable sealing Failure status monitoring method based on optical fiber grating sensing
CN105465100B (en) * 2014-09-12 2017-06-27 上海船厂船舶有限公司 Open the cabin the pressure experimental device and pressure test method of oil cylinder
CN104236835B (en) * 2014-09-30 2017-09-15 北京理工大学 A kind of hydraulic impulse formula sealing detection vibration experiment table
CN104406749A (en) * 2014-11-20 2015-03-11 湖南江滨机器(集团)有限责任公司 Simulation test method of air leakage of piston and simulation test device thereof
CN105257618B (en) * 2015-11-10 2017-04-26 浙江大学 Closed oil film visualization device capable of measuring leakage of reciprocating sealing piston
CN105547843B (en) * 2015-12-14 2018-03-09 潍柴动力股份有限公司 A kind of experimental rig and pilot system for sealing parts
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CN109162971B (en) * 2018-11-12 2019-07-16 燕山大学 Constant-pressure pressure fuel tank and its control method
CN109707698B (en) * 2019-01-11 2020-08-04 佛山市顺德区中意液压有限公司 Device for measuring friction force of hydraulic piston mechanism
CN110243554B (en) * 2019-05-15 2021-03-23 山东星奥液压机械有限公司 Hydraulic cylinder sealing performance testing device and application thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1285238A1 (en) * 1985-07-22 1987-01-23 Волгоградский завод буровой техники Rig for testing piston seals of hydraulic pumps
CN100567927C (en) * 2008-07-01 2009-12-09 徐州天地重型机械制造有限公司 A kind of energy-saving hydraulic sealing experimental bench and method thereof
CN102539257B (en) * 2011-11-15 2015-07-08 中国商用飞机有限责任公司 Device for measuring high temperature and low temperature resistance of sealing parts
CN103162918B (en) * 2013-03-12 2016-02-03 西安工业大学 The sealing property detection device of piston ring and piston rod packing and detection method thereof
CN203404164U (en) * 2013-08-13 2014-01-22 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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