CN105738092A - Pressure-limiting valve fatigue test device and method - Google Patents
Pressure-limiting valve fatigue test device and method Download PDFInfo
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- CN105738092A CN105738092A CN201610079234.9A CN201610079234A CN105738092A CN 105738092 A CN105738092 A CN 105738092A CN 201610079234 A CN201610079234 A CN 201610079234A CN 105738092 A CN105738092 A CN 105738092A
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The present invention belongs to the pressure-limiting valve fatigue test technology field, and discloses a pressure-limiting valve fatigue test device and method. The test device comprises a shell, an execution plug, a push-and-pull electromagnet and an upper computer. A pressure-limiting valve is arranged inside the shell, the push-and-pull electromagnet drives the execution plug to apply pressure on the pressure-limiting valve to simulate the real working condition, and a flow velocity sensor is arranged in an oil storage tank. The test device also comprises a displacement sensor used for detecting the displacement of the execution plug indirectly, and the upper computer is in communication connection with the power supply of a coil, the flow velocity sensor and the displacement sensor separately. According to the present invention, the push-and-pull electromagnet drives the execution plug to do the up and down reciprocating action, and all test parameters can be adjusted, so that various different working conditions can be simulated, and the fatigue test requirements of various types of pressure-limiting valves on different working conditions can be satisfied. The circulation times of the reciprocating motion of the execution plug can be counted, and the purpose of estimating the service life of the pressure-limiting valve can be achieved.
Description
Technical field
The present invention relates to pressure limiting valve fatigue strength technical field of measurement and test, particularly to a kind of pressure limiting valve fatigue experimental device and method.
Background technology
Pressure limiting valve assembles on a diesel engine as an action piece, frequently switch between opening and closing state, it is possible to can fatigue failure cause opening pressure and closing presure decline, it is impossible to meet initial designing requirement, and then cause engine failure, so need it is carried out fatigue test checking.
Pressure limiting valve: be a kind of engine oil pressure setting less than technological document for limiting lubricating system, with vandal-proof sealing member.When engine oil pressure is less than a certain marginal value, pressure limiting valve cuts out, but engine oil pressure more than a certain marginal value time pressure limiting valve open, when pressure change, pressure limiting valve constantly can cut out and open switching between two states, it is achieved the purpose of adjustment engine oil pressure.
Fatigue test: be the process measuring material or structural fatigue stress or number of strain cycles.
Sliding electromagnet: energising produces electromagnetism and drives draw bar to perform a kind of device of straight reciprocating motion.
In current practice, fatigue test about pressure limiting valve, it is pass through motor output power, motoring ring test device operates, inside assay device, the rotary motion of motor is converted to by camshaft, tappet etc. the linear reciprocating motion of push rod, so that the engine oil pressure in assay device produces change, and then realize the open and close of pressure limiting valve.
The shortcoming of prior art is as follows:
1, purely mechanic structure drives, it is impossible to the real operating environments residing for simulated engine work timing pressure valve, such as temperature, humidity, pressure oscillation etc.；
2, CYCLIC LOADING condition is restricted by cam-shaped line, single CYCLIC LOADING condition can only be applied, the condition being turned on and off correspondence is unchanged, namely all circulations can only repeat " close-fully open-close " state of simulation pressure limiting valve, according to the state of any opening degree of pressure limiting valve on practical situation real-time Simulation electromotor, more can not can not simulate the various assembled state of any opening degree of pressure limiting valve and closedown；
3, action how many times cannot be verified after the unlatching pressure of pressure limiting valve begin to decline, after also cannot learning action how many times, pressure limiting valve reaches failure state, so existing scheme cannot estimate the life-span of pressure limiting valve.
Summary of the invention
(1) to solve the technical problem that
The technical problem to be solved in the present invention is: adopt the pressure change of operating mode residing for purely mechanic structural simulation pressure limiting valve for solving existing pressure limiting valve fatigue rig, cannot adjust flexibly, the CYCLIC LOADING result simulated is single, it is impossible to simulating real operating mode, test data is inaccurate；Pressurized circulation number of times cannot be added up, it is impossible to the problem estimating pressure limiting valve service life.
(2) technical scheme
In order to solve above-mentioned technical problem, the invention provides a kind of pressure limiting valve fatigue experimental device, including: housing, perform plug, sliding electromagnet and host computer, described housing includes oil storage tank and pressurized cylinder, the top of described pressurized cylinder connects with the bottom of described oil storage tank, all stores organic oil in described oil storage tank and pressurized cylinder；
The oil-in end of pressure limiting valve penetrates the upper end of described pressurized cylinder through described oil storage tank, and pressure limiting valve is provided with the oilhole connected with described oil storage tank, oilhole described in described machine oil submergence, is provided with the flow sensor for detecting oilhole place machine oil flow velocity in described oil storage tank；
Described execution plug is positioned at described pressurized cylinder, and the described plug that performs is connected with the inwall slipper seal of described pressurized cylinder, and described execution plug can be vertically moving in described pressurized cylinder；The closing space of full machine oil is surrounded between oil-in and the execution plug of described pressure limiting valve；
Described sliding electromagnet is connected with the described plug that performs, and described sliding electromagnet is used for driving described execution plug in the vertical direction reciprocating；
Also including displacement transducer, institute's displacement sensors is for detecting the described displacement performing plug in the vertical direction；
Described host computer is connected with the power supply of described sliding electromagnet, flow sensor, displacement transducer communication respectively.
Wherein, being additionally provided with heater and the temperature sensor for testing machine oil temperature in described oil storage tank, described heater, temperature sensor are connected with described upper machine communication respectively.
Wherein, described pressure limiting valve is connected with described housing by screw thread.
Wherein, below described oilhole, the inwall of described pressure limiting valve and described pressurized cylinder is tightly connected by sealing ring.
Wherein, described sliding electromagnet include body with can the reciprocating draw bar of relative described body；
Described housing also includes connecting plate, described connecting plate is provided with at least one connecting hole, the quantity of described sliding electromagnet is less than or equal to the quantity of described connecting hole, described body is connected with described connecting plate, described draw bar is connected with the described plug that performs after described connecting hole, and described draw bar drives the described plug in the vertical direction that performs to be synchronized with the movement.
Wherein, institute's displacement sensors is arranged on described connecting plate, for detecting the draw bar displacement at vertical direction.
Wherein, the top of described oil storage tank or top are provided with the venthole being in communication with the outside.
A kind of pressure limiting valve fatigue test method, comprises the following steps:
S1, test parameters is set on host computer；
S2, detection machine oil temperature, if oil temperature is lower than minimum setting value t, then perform step S3, otherwise perform step S4；
Machine oil is heated, and performs step S2 by S3, startup heater；
S4, detection machine oil temperature, if oil temperature is greater than or equal to maximum set value T, then perform step S5, otherwise perform step S6；
S5, heater stop heating；
S6, sliding electromagnet are energized, and the draw bar of sliding electromagnet starts action, drive and perform the plug up and down reciprocatingly action that work is Tong Bu with draw bar in pressurized cylinder；
S7, detection flow sensor registration, if its displacement detected with displacement transducer is corresponding, execution step S6；Otherwise sliding electromagnet power-off, output test data, off-test.
Wherein, performing before described step S1, first determining and perform maximum pressure, the minimum pressure that plug needs to apply, and then calibrating the flow velocity of the corresponding machine oil that flow sensor detects under the displacement parameter of corresponding draw bar and different misalignment.
Wherein, described test parameters at least includes: oil temperature, perform maximum pressure, minimum pressure that plug needs apply, the displacement parameter of draw bar, the flow velocity of the machine oil that the displacement of draw bar is corresponding, and the cycle-index of reciprocating action of pressurizeing.
(3) beneficial effect
Technique scheme has the advantage that pressure limiting valve fatigue experimental device of the present invention, perform plug by adopting sliding electromagnet to drive and make synchronization action up and down reciprocatingly, perform the range of movement of plug, reciprocating action performs all scalable such as cycle, reciprocal time, same set of pressure limiting valve fatigue experimental device, the operating mode of multiple different stress or strain can be simulated, the various assembled state of simulation any opening degree of pressure limiting valve and closedown, all types of pressure limiting valves met under different operating modes carry out fatigue test requirement.In experimentation, performing to fill in reciprocating cycle-index can add up, it is possible to achieve estimate the purpose in pressure limiting valve service life.
Pressure limiting valve fatigue test method of the present invention, by adopting sliding electromagnet to drive execution to fill in row synchronization action, by changing the running parameter of sliding electromagnet, realize the amendment performing parameters corresponding to plug, the various operating modes residing for pressure limiting valve can be simulated, the real operating environments of alternating temperature machine oil in simulation pressure limiting valve pressurized cylinder；CYCLIC LOADING condition is not restricted, and according to the state of any opening degree of the pressure limiting valve on practical situation simulated engine, can set corresponding alternate load according to different operating modes and examination specification；After can verifying action how many times, the unlatching pressure of pressure limiting valve begins to decline, it is also possible to after learning action how many times, pressure limiting valve reaches failure state, it is simple to the service life of detection pressure limiting valve；Pressure limiting valve without being arranged on electromotor complete machine just to carry out fatigue test, simple and easy reliably, easy to operate；Simple in construction, good reliability, easily operation, efficiency is high, cost is low, can be widely applied to car load factory, engine works, parts factory and Related product quality inspection mechanism etc..
Accompanying drawing explanation
Fig. 1 is the sectional view of pressure limiting valve fatigue experimental device of the present invention；
Fig. 2 is the perspective view of pressure limiting valve fatigue experimental device of the present invention；
Fig. 3 is the control principle drawing of pressure limiting valve fatigue experimental device of the present invention；
Fig. 4 is the flow chart of pressure limiting valve fatigue test method of the present invention.
Wherein, 1, housing；11, oil storage tank；12, pressurized cylinder；13, heater；14, temperature sensor；15, flow sensor；2, pressure limiting valve；21, oilhole；22, piston cap；23, spring；3, plug is performed；4, sliding electromagnet；5, connecting plate；6, displacement transducer；24, venthole；25, sealing ring.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following example are used for illustrating the present invention, but are not limited to the scope of the present invention.
In describing the invention, it is necessary to explanation, except as otherwise noted, " multiple " are meant that two or more；Term " on ", D score, "left", "right", " interior ", " outward ", " front end ", " rear end ", " head ", the orientation of the instruction such as " afterbody " or position relationship be based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.Additionally, term " first ", " second ", " the 3rd " etc. are only for descriptive purposes, and it is not intended that indicate or hint relative importance.
In describing the invention, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or connect integratedly；Can be mechanically connected, it is also possible to be electrical connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary.For the ordinary skill in the art, visual concrete condition understands above-mentioned term concrete meaning in the present invention.
Embodiment one:
As Figure 1-3, the invention discloses a kind of pressure limiting valve fatigue experimental device, including: housing 1, execution plug 3, sliding electromagnet 4 and host computer, described housing 1 includes oil storage tank 11 and pressurized cylinder 12, the top of described pressurized cylinder 12 connects with the bottom of described oil storage tank 11, all stores organic oil in described oil storage tank 11 and pressurized cylinder 12；
The oil-in end of pressure limiting valve 2 penetrates the upper end of described pressurized cylinder 12 through described oil storage tank 11, pressure limiting valve 2 is provided with the oilhole 21 connected with described oil storage tank 11, oilhole 21 described in described machine oil submergence, is provided with the flow sensor 15 for detecting oilhole 21 place machine oil flow velocity in described oil storage tank 11；
The described plug 3 that performs is positioned at described pressurized cylinder 12, and the described plug 3 that performs is connected with the inwall slipper seal of described pressurized cylinder 12, and described execution plug 3 can be vertically moving in described pressurized cylinder 12；The closing space of full machine oil is surrounded between oil-in and the execution plug 3 of described pressure limiting valve 2；Closing herein is relative, oil storage tank 11 is connected with pressurized cylinder 12 by oilhole 21, in performing the process that plug 3 moves downward, utilizing pressure environment relatively low in pressurized cylinder 12 and the gravity of machine oil itself, the part machine oil in oil storage tank 11 is refluxed in pressurized cylinder 12 by this oilhole 21.
Described sliding electromagnet 4 is connected with the described plug 3 that performs, and described sliding electromagnet 4 is used for driving described execution plug 3 in the vertical directions reciprocating；
Also including displacement transducer 6, institute's displacement sensors 6 is for detecting the described displacement performing plug 3 in the vertical directions；
Described host computer is connected with the power supply of described coil, flow sensor 15, displacement transducer 6 communication respectively.
By arranging sliding electromagnet 4, sliding electromagnet 4 is connected with performing plug 3, and sliding electromagnet 4 drives execution plug 3 to do up and down reciprocatingly action in pressurized cylinder 12, it is achieved pressurization and the pressure discharge operations to pressure limiting valve 2 inner engine oil, the actual condition of simulation pressure limiting valve 2.Oil return is realized by oilhole 21 between pressurized cylinder 12 and oil storage tank 11；When performing plug 3 and moving upward, the machine oil pressure experienced in pressurized cylinder 12 is gradually increased, and then promotes the piston cap 22 in pressure limiting valve 2 to move upward, and spring 23 is compressed；When piston cap 22 moves to the state that pressurized cylinder 12 connects with oilhole 21, the machine oil in pressurized cylinder 12 begins through oilhole 21 and flows out, and flow sensor 15 detects the machine oil flow velocity at oilhole 21 place in real time, to verify the flow velocity that under different pressurized state, machine oil is corresponding；When pressurized cylinder 12 is in the critical state being about to connect with oilhole 21, in pressurized cylinder 12, pressure experienced is maximum, the displacement performing plug 3 now corresponding is called critical displacement, this critical displacement is fixed value, this fixed value is affected by factors such as spring 23 elastic force, pressure limiting valve 2 oil-in internal diameter sizes, the threshold opening pressure that each different pressure limiting valve 2 is corresponding different, is the self attributes of pressure limiting valve 2；The flow velocity at pressure release moment oilhole 21 place that flow sensor 15 detects is corresponding with this critical displacement, and machine oil falls within fixed value at this flashy flow velocity, would not change after demarcation；Therefore, if flow sensor 15 detects when the flow velocity at pressure release moment oilhole 21 place and the critical displacement of sliding electromagnet 4 are not inconsistent, namely can determine that pressure limiting valve 2 lost efficacy, off-test.
Above said is a special example of comparison；Substantially, perform plug 3 in pressure process not in the same time also to there being different machine oil flow velocitys.Namely, in performing the process of motion of plug 3, different displacements all have the machine oil flow velocity of correspondence；The machine oil flow velocity detected when a certain moment flow sensor 15 fills in 3 locations not to then illustrating time corresponding that pressure limiting valve 2 lost efficacy with now execution.
By driving the action performing plug 3 work up and down reciprocatingly with sliding electromagnet 4, perform the range of movement of plug 3, reciprocating action performs all scalable such as cycle, reciprocal time, same set of pressure limiting valve fatigue experimental device, the operating mode of multiple different stress or strain can be simulated, the various assembled state of simulation any opening degree of pressure limiting valve 2 and closedown, all types of pressure limiting valves 2 met under different operating modes carry out fatigue test requirement.In experimentation, performing plug 3 reciprocating cycle-indexes can add up, it is possible to achieve estimate the purpose in pressure limiting valve 2 service life.
Further, being additionally provided with heater 13 and the temperature sensor 14 for testing machine oil temperature in described oil storage tank 11, described heater 13, temperature sensor 14 are connected with described upper machine communication respectively.In order to make parameters be more nearly the real working condition of pressure limiting valve 2, being provided with heater 13, heater 13 by the temperature under machine oil heating to real working condition, and then can reduce test error, and the data that test obtains are more true, accurate.
Owing to needing to seal between pressure limiting valve 2 and pressurized cylinder 12, to form the environment of relative closure, and this sealing there is a need for being able to bear certain pressure effect, therefore to ensure fastness and sealing that both connect.So, described pressure limiting valve 2 is connected with described housing 1 by screw thread.Preferably, threaded with housing 1 in the upper end of pressure limiting valve 2.Below described oilhole 21, the inwall of described pressure limiting valve 2 and described pressurized cylinder 12 is tightly connected by sealing ring 25.Arranging annular groove on outer wall preferably in pressure limiting valve 2, be pre-installed in this annular groove by sealing ring 25, pressure limiting valve 2 can be automatically obtained being tightly connected between pressurized cylinder 12 after installing.The threaded fastness that can ensure that both connect, sealing ring 25 can ensure that sealing between the two.
Except threaded connection place, should reserving certain gap between pressure limiting valve 2 and shell 1, penetrate in pressurized cylinder 12 to facilitate by pressure limiting valve 2, such as reserve the gap of about 1mm, after loading, sealing ring 25 can coordinate with the inwall of pressurized cylinder 12 automatically, it is achieved is tightly connected.
Further, described sliding electromagnet 4 include body with can the reciprocating draw bar of relative described body；Described housing 1 also includes connecting plate 5, described connecting plate 5 is provided with at least one connecting hole, the quantity of described sliding electromagnet 4 is less than or equal to the quantity of described connecting hole, described body is connected with described connecting plate 5, described draw bar is connected with the described plug 3 that performs after described connecting hole, and described draw bar drives described plug 3 in the vertical directions that perform to be synchronized with the movement.Institute's displacement sensors 6 is arranged on described connecting plate 5, for detecting the draw bar displacement at vertical direction.
Connecting plate 5 is horizontally disposed with, and performs plug 3 and is connected to the center of connecting plate 5 and vertically arranged, and draw bar is vertically arranged and is located in respectively in corresponding connecting hole；Performing plug 3 and draw bar synchronization action, displacement transducer 6 is the vertical displacement in order to detect draw bar, to realize the purpose of indirect detection execution plug 3 displacements, therefore arranges one；Certainly, it is possible to multiple averaging is set and improves accuracy of detection.
The connecting plate 5 arranged outside bottom pressurized cylinder 12；Draw bar upper end is connected with body, and lower end is passed through upwardly extending T-type structure in the middle part of in the of and is connected with performing plug 3, it is achieved perform the purpose of plug 3 and at least one draw bar synchronization action.
Further, the top of described oil storage tank 11 or top are provided with the venthole 24 being in communication with the outside；In process of the test, the oil level in oil storage tank 11 can change, and for getting rid of air pressure change, test data is impacted, is provided with venthole 24.
Embodiment two:
The present invention also disclosed and utilizes pressure limiting valve fatigue experimental device described in embodiment one to carry out the pressure limiting valve fatigue test method tested, and as shown in Figure 4, the method comprises the following steps:
S1, test parameters is set on host computer；The maximum pressures etc. that needed for such as performing number of times, experiment, the temperature range of machine oil, execution plug 3 apply to machine oil；
S2, detection machine oil temperature, if oil temperature is lower than minimum setting value t, then perform step S3, otherwise perform step S4；
Machine oil is heated, and performs step S2 by S3, startup heater 13；
S4, detection machine oil temperature, if oil temperature is greater than or equal to maximum set value T, then perform step S5, otherwise perform step S6；
S5, heater 13 stop heating；
S6, sliding electromagnet 4 are energized, and the draw bar of sliding electromagnet 4 starts action, drive and perform the plug 3 up and down reciprocatingly action that work is Tong Bu with draw bar in pressurized cylinder 12；
S7, detection flow sensor 15 registration, if it is corresponding with the displacement that displacement transducer 6 detects, execution step S6；Otherwise sliding electromagnet 4 power-off, output test data, off-test.
Further, performing before described step S1, first determining the maximum pressure, the minimum pressures that perform plug 3 needs and apply, and then calibrating the flow velocity of the corresponding machine oil that flow sensor 15 detects under the displacement parameter of corresponding draw bar and different misalignment.Owing to the operating mode of different pressure limiting valves 2 is different, the flow velocity of machine oil when corresponding maximum moulding pressure, pressure release, perform scopes that plug 3 moves, the cycle etc. of up and down reciprocatingly action is required for redefining；Though the pressure release flow velocity that maximum moulding pressure is corresponding is corresponding, but after assay device and pressure limiting valve 2 model determine, in addition it is also necessary to again demarcate pressure release flow velocity corresponding to maximum pressure, the displacement parameter etc. of draw bar that maximum pressure is corresponding.Only above-mentioned parameter just can simulate the test parameters closest to this pressure limiting valve 2 real working condition after all confirming.
Concrete, described test parameters at least includes: oil temperature, perform maximum pressure, minimum pressure that plug 3 needs apply, the displacement parameter of draw bar, the flow velocity of the machine oil that the displacement of draw bar is corresponding, and the cycle-index of reciprocating action of pressurizeing.
The displacement parameter of draw bar refers to execution plug 3 the up and down motion corresponding maximum displacement value of draw bar, least displacement value, and above-mentioned test parameters also includes the cycle etc. performing plug 3 up and down motion.
As shown in Figure 3, host computer respectively with: temperature sensor 14, flow sensor 15, displacement transducer 6, heater 13, sliding electromagnet 4 power supply communication be connected, for receiving: the data that temperature sensor 14, flow sensor 15, displacement transducer 6 detect, pass through digital-to-analogue conversion, and the program according to internal preset sends control instruction to heater 13, sliding electromagnet 4, control the open and close of heater 13, adjust the reciprocation period of draw bar, range of movement etc.；Before experiment starts, it is necessary to the above-mentioned parameter calibrated is passed in host computer.
Below the concrete steps of pressure limiting valve fatigue test method of the present invention are described in detail:
Assay device and pressure limiting valve 2 calibrate the parameters such as pressure release flow velocity, then set parameters on host computer after determining, heater 13 is energized, and oil temperature begins to ramp up, simultaneously testing machine oil temperature judge whether to need continue heating or stop heating；After oil temperature rises to setting value, sliding electromagnet 4 is energized, the action simultaneously of multiple draw bars, it is preferably symmetrically arranged two, performing plug 3 and make the up and down reciprocatingly rectilinear motion Tong Bu with draw bar under the push-and-pull action of draw bar, the parameter of the characteristics of motion is demarcated in advance according to the pressure limiting valve 2 of different model, different operating mode, different examination specifications etc. and inputs host computer.The conversion pressure of pressurized cylinder 12 inner engine oil is the displacement performing plug 3, and is monitored by displacement transducer 6.
Performing to start pressure release when plug 3 is pressurized to certain pressure, the machine oil in pressurized cylinder 12 enters oil storage tank 11 by oilhole 21；When execution plug 3 moves down, piston cap 22 moves down under the promotion of spring 23, and oilhole 21 is blocked, and in host computer, the period increase of record is once；Performing plug 3 and move down in process, the machine oil in oil storage tank 11 flows to pressurized cylinder 12 by oilhole 21；Performing in plug 3 reciprocatory movement, flow sensor 15 detects in real time and performs the machine oil flow velocity that plug 3 is corresponding when diverse location, compares as one group of parameter with corresponding machine oil flow velocity by pressure.
When the machine oil flow velocity that flow sensor 15 monitors is different from the flow velocity numerical value demarcated under this pressure, then showing that the unlatching pressure of pressure limiting valve 2 is already less than design load, namely pressure limiting valve 2 lost efficacy.After pressure limiting valve 2 loses efficacy, whole system quit work, by host computer record and export correlation test data.
During test, a collection of pressure limiting valve 2 under same operating being sampled and tests, the meansigma methods of pressurized circulation number of times is under corresponding operating mode the average life of this batch of pressure limiting valve 2.
As can be seen from the above embodiments, pressure limiting valve fatigue experimental device of the present invention, plug 3 work synchronization action up and down reciprocatingly is performed by adopting sliding electromagnet 4 to drive, perform the range of movement of plug 3, reciprocating action performs all scalable such as cycle, reciprocal time, same set of pressure limiting valve fatigue experimental device, the operating mode of multiple different stress or strain can be simulated, the various assembled state of simulation any opening degree of pressure limiting valve 2 and closedown, all types of pressure limiting valves 2 met under different operating modes carry out fatigue test requirement.In experimentation, performing plug 3 reciprocating cycle-indexes can add up, it is possible to achieve estimate the purpose in pressure limiting valve 2 service life.
Pressure limiting valve fatigue test method of the present invention, perform plug 3 by adopting sliding electromagnet 4 to drive and carry out synchronization action, by changing the running parameter of sliding electromagnet 4, realize the amendment to the parameters performing plug 3 correspondences, the various operating modes residing for pressure limiting valve 2 can be simulated, the real operating environments of alternating temperature machine oil in simulation pressurized cylinder 12；CYCLIC LOADING condition is not restricted, and according to the state of any opening degree of the pressure limiting valve 2 on practical situation simulated engine, can set corresponding alternate load according to different operating modes and examination specification；After can verifying action how many times, the unlatching pressure of pressure limiting valve 2 begins to decline, it is also possible to after learning action how many times, pressure limiting valve 2 reaches failure state, it is simple to the service life of detection pressure limiting valve 2；Pressure limiting valve 2 without being arranged on electromotor complete machine just to carry out fatigue test, simple and easy reliably, easy to operate；Simple in construction, good reliability, easily operation, efficiency is high, cost is low, can be widely applied to car load factory, engine works, parts factory and Related product quality inspection mechanism etc..
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the technology of the present invention principle; can also making some improvement and replacement, these improve and replace and also should be regarded as protection scope of the present invention.
Claims (10)
1. a pressure limiting valve fatigue experimental device, it is characterized in that, including: housing (1), perform plug (3), sliding electromagnet (4) and host computer, described housing (1) includes oil storage tank (11) and pressurized cylinder (12), the top of described pressurized cylinder (12) connects with the bottom of described oil storage tank (11), all stores organic oil in described oil storage tank (11) and pressurized cylinder (12)；
The oil-in end of pressure limiting valve (2) penetrates the upper end of described pressurized cylinder (12) through described oil storage tank (11), pressure limiting valve (2) is provided with the oilhole (21) connected with described oil storage tank (11), oilhole (21) described in described machine oil submergence, is provided with the flow sensor (15) for detecting oilhole (21) place machine oil flow velocity in described oil storage tank (11)；
The described plug (3) that performs is positioned at described pressurized cylinder (12), the described plug (3) that performs is connected with the inwall slipper seal of described pressurized cylinder (12), and the described plug (3) that performs can be vertically moving in described pressurized cylinder (12)；The oil-in of described pressure limiting valve (2) and perform to surround between plug (3) the closing space of full machine oil；
Described sliding electromagnet (4) is connected with the described plug (3) that performs, and described sliding electromagnet (4) is used for driving that described to perform plug (3) in the vertical direction reciprocating；
Also including displacement transducer (6), institute's displacement sensors (6) is used for detecting the described displacement performing plug (3) in the vertical direction；
Described host computer is connected with the power supply of described sliding electromagnet (4), flow sensor (15), displacement transducer (6) communication respectively.
2. pressure limiting valve fatigue experimental device as claimed in claim 1, it is characterized in that, being additionally provided with heater (13) and the temperature sensor (14) for testing machine oil temperature in described oil storage tank (11), described heater (13), temperature sensor (14) are connected with described upper machine communication respectively.
3. pressure limiting valve fatigue experimental device as claimed in claim 1, it is characterised in that described pressure limiting valve (2) is connected with described housing (1) by screw thread.
4. the pressure limiting valve fatigue experimental device as described in claim 1 or 3, it is characterized in that, in described oilhole (21) lower section, the inwall of described pressure limiting valve (2) and described pressurized cylinder (12) is tightly connected by sealing ring (25).
5. pressure limiting valve fatigue experimental device as claimed in claim 1, it is characterised in that described sliding electromagnet (4) include body with can the reciprocating draw bar of relative described body；
Described housing (1) also includes connecting plate (5), described connecting plate (5) is provided with at least one connecting hole, the quantity of described sliding electromagnet (4) is less than or equal to the quantity of described connecting hole, described body is connected with described connecting plate (5), described draw bar is connected with the described plug (3) that performs after described connecting hole, and described draw bar drives described plug (3) in the vertical direction that performs to be synchronized with the movement.
6. pressure limiting valve fatigue experimental device as claimed in claim 5, it is characterised in that institute's displacement sensors (6) is arranged on described connecting plate (5), for detecting the draw bar displacement at vertical direction.
7. pressure limiting valve fatigue experimental device as claimed in claim 1, it is characterised in that the top of described oil storage tank (11) or top are provided with the venthole (24) being in communication with the outside.
8. a pressure limiting valve fatigue test method, it is characterised in that comprise the following steps:
S1, test parameters is set on host computer；
S2, detection machine oil temperature, if oil temperature is lower than minimum setting value t, then perform step S3, otherwise perform step S4；
Machine oil is heated, and performs step S2 by S3, startup heater (13)；
S4, detection machine oil temperature, if oil temperature is greater than or equal to maximum set value T, then perform step S5, otherwise perform step S6；
S5, heater (13) stop heating；
S6, sliding electromagnet (4) are energized, and the draw bar of sliding electromagnet (4) starts action, and drive performs plug (3) and does the up and down reciprocatingly action Tong Bu with draw bar in pressurized cylinder (12)；
S7, detection flow sensor (15) registration, if it is corresponding with the displacement that displacement transducer (6) detects, execution step S6；Otherwise sliding electromagnet (4) power-off, output test data, off-test.
9. pressure limiting valve fatigue test method as claimed in claim 8, it is characterized in that, before performing described step S1, first determine and perform maximum pressure, the minimum pressure that plug (3) needs to apply, and then calibrate the flow velocity of the corresponding machine oil that flow sensor (15) detects under the displacement parameter of corresponding draw bar and different misalignment.
10. pressure limiting valve fatigue test method as claimed in claim 9, it is characterized in that, described test parameters at least includes: oil temperature, perform plug (3) needs apply maximum pressure, minimum pressure, the displacement parameter of draw bar, the flow velocity of the machine oil that the displacement of draw bar is corresponding, and the cycle-index of pressurization reciprocating action.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610079234.9A CN105738092B (en) | 2016-02-04 | 2016-02-04 | A kind of pressure limiting valve fatigue experimental device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610079234.9A CN105738092B (en) | 2016-02-04 | 2016-02-04 | A kind of pressure limiting valve fatigue experimental device and method |
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| CN105738092A true CN105738092A (en) | 2016-07-06 |
| CN105738092B CN105738092B (en) | 2018-03-13 |
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| CN201610079234.9A Active CN105738092B (en) | 2016-02-04 | 2016-02-04 | A kind of pressure limiting valve fatigue experimental device and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061643A (en) * | 2017-07-24 | 2018-05-22 | 宁波方太厨具有限公司 | The electric-control system of valve body life-test rack and valve body life testing method |
| CN108088670A (en) * | 2017-11-29 | 2018-05-29 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of low load fatigue test system of aircraft installation system |
| CN108917694A (en) * | 2018-07-16 | 2018-11-30 | 三峡大学 | Deformation monitoring and the device and method of supporting after a kind of tunnel Rock And Soil excavates |
| CN113607358A (en) * | 2021-07-30 | 2021-11-05 | 西安昆仑工业（集团）有限责任公司 | High-frequency striker spring fatigue test device and test method |
| CN113970428A (en) * | 2021-09-13 | 2022-01-25 | 南京理工大学 | Testing machine for testing fatigue of firing pin |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5203617A (en) * | 1991-01-30 | 1993-04-20 | Robert Bosch Gmbh | Electromagnetically-actuated 2/2-way valve, for hydraulic motor vehicle brake systems having an anti-skid and traction control apparatus |
| CN1901985A (en) * | 2003-11-03 | 2007-01-24 | 科斯洛技术公司 | Pressure limiting and/or flow regulating valve for use with POU/POE filter system |
| CN1908609A (en) * | 2006-08-23 | 2007-02-07 | 中国第一汽车集团公司 | Dry testing method for pressure limiting valve opening pressure |
| CN203616109U (en) * | 2013-12-03 | 2014-05-28 | 潍柴动力股份有限公司 | Fatigue test device for pressure limiting valve |
| CN203616104U (en) * | 2013-11-19 | 2014-05-28 | 潍柴动力股份有限公司 | Pressure limiting valve durability test device |
| CN204611003U (en) * | 2015-04-27 | 2015-09-02 | 托普威尔石油技术股份公司 | A kind of Intelligent control type cover gas pressure-limit valve |
-
2016
- 2016-02-04 CN CN201610079234.9A patent/CN105738092B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5203617A (en) * | 1991-01-30 | 1993-04-20 | Robert Bosch Gmbh | Electromagnetically-actuated 2/2-way valve, for hydraulic motor vehicle brake systems having an anti-skid and traction control apparatus |
| CN1901985A (en) * | 2003-11-03 | 2007-01-24 | 科斯洛技术公司 | Pressure limiting and/or flow regulating valve for use with POU/POE filter system |
| CN1908609A (en) * | 2006-08-23 | 2007-02-07 | 中国第一汽车集团公司 | Dry testing method for pressure limiting valve opening pressure |
| CN203616104U (en) * | 2013-11-19 | 2014-05-28 | 潍柴动力股份有限公司 | Pressure limiting valve durability test device |
| CN203616109U (en) * | 2013-12-03 | 2014-05-28 | 潍柴动力股份有限公司 | Fatigue test device for pressure limiting valve |
| CN204611003U (en) * | 2015-04-27 | 2015-09-02 | 托普威尔石油技术股份公司 | A kind of Intelligent control type cover gas pressure-limit valve |
Non-Patent Citations (1)
| Title |
|---|
| 宋国民等: ""高压共轨系统限压阀试验研究"", 《现代车用动力》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061643A (en) * | 2017-07-24 | 2018-05-22 | 宁波方太厨具有限公司 | The electric-control system of valve body life-test rack and valve body life testing method |
| CN108088670A (en) * | 2017-11-29 | 2018-05-29 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of low load fatigue test system of aircraft installation system |
| CN108917694A (en) * | 2018-07-16 | 2018-11-30 | 三峡大学 | Deformation monitoring and the device and method of supporting after a kind of tunnel Rock And Soil excavates |
| CN113607358A (en) * | 2021-07-30 | 2021-11-05 | 西安昆仑工业（集团）有限责任公司 | High-frequency striker spring fatigue test device and test method |
| CN113607358B (en) * | 2021-07-30 | 2024-03-29 | 西安昆仑工业（集团）有限责任公司 | High-frequency firing pin spring fatigue test device and test method |
| CN113970428A (en) * | 2021-09-13 | 2022-01-25 | 南京理工大学 | Testing machine for testing fatigue of firing pin |
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| CN105738092B (en) | 2018-03-13 |
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