CN102042144A - Self-adaptive floating clamping device for engine fuel injector testing stand - Google Patents
Self-adaptive floating clamping device for engine fuel injector testing stand Download PDFInfo
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- CN102042144A CN102042144A CN 201110004121 CN201110004121A CN102042144A CN 102042144 A CN102042144 A CN 102042144A CN 201110004121 CN201110004121 CN 201110004121 CN 201110004121 A CN201110004121 A CN 201110004121A CN 102042144 A CN102042144 A CN 102042144A
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Abstract
The invention discloses a self-adaptive floating clamping device for an engine fuel injector testing stand, which comprises a cam mechanism and a hydraulic control mechanism, wherein the cam mechanism comprises a cam and a driven rod; the hydraulic control mechanism comprises an intermediate piston, a piston sleeve, a left piston, a right piston and a piston rod; the intermediate piston is sheathed on the left piston, the piston sleeve is sheathed on the intermediate piston and the right piston, and the left piston and the right piston are fixed at both ends of the piston rod; a cavity between the left piston and the bottom of the intermediate piston is a sealing cavity, a cavity between the bottom of the intermediate piston and the right piston is a releasing cavity, and a cavity between the right piston and the bottom of the piston sleeve is a clamping cavity; and the left piston is provided with a fuel injection nozzle bayonet, and the driven rod is mounted in a guide hole to make a reciprocating motion. By using the cam mechanism and the hydraulic control mechanism, the self-adaptive floating clamping device provided by the invention realizes the floating type clamping and releasing of a fuel injector, improves the operating efficiency and ensures the safety and convenience of the detection process.
Description
Technical field
The present invention relates to motor, relate in particular to a kind of self-adapting float clamp device of engine fuel injector test stand.
Background technique
The control of the oil spout moment of diesel engine, oil mass, injection process all be unable to do without oil sprayer, so oil sprayer is as the core constituent element of diesel engine, and direct relation the performance of diesel engine performance.Nowadays, the research of oil sprayer become one of key project to diesel engine research, the development of electric-controlled injection technology makes oil sprayer bear the more and more task of core.
The present motor that uses, if need accurately measure, must on test stand, while accurate and effective simulation cam drive rotating speed, cam impulsive load, cam load complex situations such as rule, charge oil pressure, installing and locating mode, working oil temperature to the fuel injection quantity of oil sprayer.When engine type not simultaneously, just need change accordingly above-mentioned simulation.In addition,, and ensure that oil sprayer installs and the rapidity of removing, relevant harsh requirements such as the self adaption location of satisfying the oil sprayer strictness and effect stroke because test stand must adapt to the various oil sprayers of different size, shape and type; Then do not need to consider above-mentioned particularity at specific motor, only need to install model and require corresponding a kind of oil sprayer, and on specific cylinder cap, carry out disposable installation and adjustment.
For these reasons, present engine fuel injector test stand is difficult to test specimen oil sprayer (especially at the PT oil sprayer), carries out quick mounting and impacts loading, also is difficult to fast quick-detach after test is finished.
Improve the engine fuel injector test stand, make the installation and removal of test specimen oil sprayer in the short time (such as several seconds), to finish, and in the process of the test of high speed large impact operation, remain accurate effect stroke, point of action and just right active force, avoid any type of mistake, to reduce the damage that oil sprayer is caused, reducing the error of metering, is one of project of research at present.But this all is a thorny difficult problem in structural design and technological design.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of self-adapting float clamp device of engine fuel injector test stand, can adapt to the rapid installation and removal of the oil sprayer of various sizes, shape and type, guarantee simultaneously in the process of the test of high speed large impact operation, to remain accurate effect stroke, point of action and suitable active force, the damage that minimizing causes oil sprayer reduces the error of measuring.
Technological scheme: for achieving the above object, the technical solution used in the present invention is:
A kind of self-adapting float clamp device of engine fuel injector test stand comprises cam mechanism and hydraulic control mechanism.
Described cam mechanism comprises cam and follower lever, and described follower lever is installed in the pilot hole, and the one end contacts with the curved surface of cam, and the other end is provided with the hold down gag that compresses the oil sprayer spring, and described cam is installed on the camshaft, and camshaft location is fixed; Cam rotates around camshaft, drives follower lever and moves reciprocatingly in pilot hole.
Described hydraulic control mechanism comprises intermediate piston, piston sleeve, left piston, right piston and piston rod, described piston sleeve fixed-site; Described intermediate piston is sleeved on the left piston, and piston sleeve is sleeved on intermediate piston and the right piston, and piston rod passes intermediate piston bottom and the suitable hole of piston rod, and described left piston and right piston are fixed on the two ends of piston rod; In middle kink, the cavity between left piston and the intermediate piston bottom is a Seal cage, and described Seal cage is connected with the Seal cage oil circuit; In piston sleeve, the cavity between intermediate piston bottom and the right piston is for loosening the chamber, describedly loosens the chamber and loosens the chamber oil circuit and be connected; In piston sleeve, the cavity between right piston and the piston sleeve bottom is for clamping the chamber, and described clamping chamber is connected with clamping chamber oil circuit; Because left piston and right piston fix by piston rod, thereby the motion of left piston and right piston is consistent; In described hydraulic control mechanism, be that oil return or oil-feed state can be controlled moving of intermediate piston, left piston and right piston by controlling Seal cage, loosening the chamber and clamp the chamber; Described left piston is provided with the oil nozzle bayonet socket with the side that piston rod deviates from mutually.
The hold down gag of follower lever end can compress the oil sprayer spring on the oil sprayer, and the oil nozzle bayonet socket on the left piston can block oil nozzle; Like this, can clamp the oil injector body of test specimen oil sprayer by left piston and intermediate piston; Just can hold out against the oil sprayer plunger by left piston, cam and follower lever.The oil sprayer spring can guarantee that the oil sprayer plunger is followed return when cam return.
Because the travel position of cam mechanism and the fixed-site of piston sleeve, by regulating Seal cage, loosening the oil return or the oil-feed state in chamber and clamping chamber, can realize rapid installation and removal to the oil sprayer of various sizes, shape and type, the use of oil sprayer spring has simultaneously slowed down the impact force that oil sprayer is subjected to, avoid the loss that in the process of the test oil sprayer caused, improve measuring accuracy.
During use, at first block oil nozzle, by oil sprayer spring compression oil sprayer plunger, to limit measured piece oil sprayer position by the oil nozzle bayonet socket.When oil sprayer loosens, loosen the chamber oil-feed, Seal cage and clamp the chamber oil return simultaneously to fuel tank, then left piston and right piston right lateral, the intermediate piston left lateral loosens oil injector body and oil sprayer plunger and follower lever.When oil sprayer clamps the preparation test, cam must be in the range place, loosen the chamber oil return to fuel tank, Seal cage and clamping chamber oil-feed simultaneously, left piston and right piston left lateral, the intermediate piston right lateral, clamp oil injector body, while oil injector body integral body is left lateral under the promotion of right piston also, oil sprayer plunger and follower lever are held out against, and static pressure is controlled in the predetermined range by oil pressure, guarantees in the process of the test, diesel oil is all extruded and is participated in metering in the oil-fuel injector needle-valve below, is unlikely to simultaneously because the bad oil nozzle part in the excessive top of active force.
Described Seal cage oil circuit is arranged on the intermediate piston, and the described chamber oil circuit that loosens is arranged on the piston sleeve, and described clamping chamber oil circuit is arranged on the piston sleeve.
Described self-adapting float clamp device can also comprise the housing of placing the test specimen oil sprayer, and described housing and middle kink fix.
What described self-adapting float clamp device had satisfied the nozzle holder of different shape and size and movement parts (oil sprayer plunger) clamps the requirement of loosening synchronously, fast; And cam can also be realized the automatic location of cam position in the oil sprayer clamping process by cam position detection device and synchronous numerical control electromagnetic arrestment mechanism.
Beneficial effect: the self-adapting float clamp device of a kind of engine fuel injector test stand provided by the invention, adopt cam mechanism and hydraulic control mechanism, realized floating type clamping, improved the Security and the convenience of operating efficiency, testing process oil sprayer.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of cam;
Fig. 3 is the structural representation of the engine fuel injector test stand of use apparatus of the present invention;
Fig. 4 is a kind of oil circuit schematic representation at the fluid drive mechanism among the present invention;
Fig. 5 is for clamping cavity pressure wave process schematic representation.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explanation.
Be illustrated in figure 1 as a kind of structural representation of self-adapting float clamp device of engine fuel injector test stand, comprise cam mechanism and hydraulic control mechanism.
Described cam mechanism comprises structure cam 10 and follower lever 9 as shown in Figure 2, described follower lever 9 is installed in the pilot hole, and the one end contacts with the curved surface of cam 10, and the other end is provided with the hold down gag that compresses oil sprayer spring 8, described cam 10 is installed on the camshaft, and camshaft location is fixed.
Described hydraulic control mechanism comprises intermediate piston 1, piston sleeve 2, left piston 4, right piston 3 and piston rod, described piston sleeve 2 fixed-site; Described intermediate piston is sleeved on the left piston 4, and piston sleeve 2 is sleeved on intermediate piston 1 and the right piston 3, and piston rod passes intermediate piston 1 bottom and the suitable hole of piston rod, and described left piston 4 and right piston 3 are fixed on the two ends of piston rod; In middle kink 1, the cavity between left piston 4 and intermediate piston 1 bottom is Seal cage C, and the Seal cage oil circuit that is provided with on described Seal cage C and the middle kink 1 is connected; In piston sleeve 2, the cavity between intermediate piston 1 bottom and the right piston 3 is for loosening chamber B, and the described chamber oil circuit that loosens that is provided with on chamber B and the piston sleeve 2 that loosens is connected; In piston sleeve 2, the cavity between right piston 3 and piston sleeve 2 bottoms is for clamping chamber D, and the clamping chamber oil circuit of setting is connected on described clamping chamber D and the piston sleeve 2; Housing and the middle kink 2 of placing the test specimen oil sprayer fix; Described left piston 4 is provided with the oil nozzle bayonet socket with the side that piston rod deviates from mutually.
During use, oil nozzle is stuck on the oil nozzle bayonet socket, oil-fuel injector needle-valve 7 is sealed by the oil nozzle bayonet socket, and the hold down gag of follower lever 9 ends compresses oil sprayer spring 8, and oil sprayer spring 8 withstands oil sprayer plunger 6, and oil injector body 5 places in the housing.
Figure 3 shows that the structural representation of the engine fuel injector test stand that uses above-mentioned self-adapting float clamp device, power supply is controlled cam mechanism (cam drive and positioning means) and oil circuit and multi-stage pressure regulating system with electric control system, hydraulic control mechanism is controlled by oil circuit and multi-stage pressure regulating system, the related data of hydraulic control mechanism and cam mechanism shows that by the metrology and measurement display system content displayed comprises information such as fuel injection quantity, frequency, oil pressure, oily temperature; The engine fuel injector test platform structure also needs the oily temperature in the oil circuit is controlled simultaneously, so oil circuit and multi-stage pressure regulating system also accept the regulation and control of oily temperature automatic control system simultaneously.
In structure shown in Figure 3, oil circuit part can adopt structure shown in Figure 4, utilize solenoid valve to Seal cage C, loosen chamber B and clamp chamber D and carry out the control of oil-feed and oil return state, wherein FX is a selector valve, JY is a decompression venting valve, YL is a relief valve, JZ is a stop valve.In fuel tank, be provided with heater and temperature transducer, oily temperature is monitored in real time.By whether electric can the control hydraulic control mechanism that get of each valve body in the PLC control oil channel, the sequence of operation that designs described engine fuel injector test stand is:
0s～10s: clamp chamber D and be in oil return state (Seal cage C synchronous working);
10s～20s: clamp chamber D and begin way system pressure oil (the synchronous way system pressure oil of Seal cage C), left piston and right piston left lateral to putting in place, the intermediate piston right lateral to put in place, 20s end stop valve JZ1 ends;
30s～60s: cam motor starts, the oil sprayer commencement of fuel injection;
60s～80s: cam motor stops, and oil sprayer stops oil spout, and 75s end stop valve JZ1 connects system pressure, until 80s.
80s～90s: clamp chamber D and begin to take back oil (Seal cage C begins oil return synchronously), loosen chamber B way system pressure oil simultaneously, left piston and right piston right lateral and putting in place under the promotion of loosening chamber B.
Based on the sequence of operation of above-mentioned engine fuel injector test stand, the rotating speed of design camshaft is 1025r/min, and the oil sprayer charge oil pressure is 0.8MPa; The counting of oil spout number of times can be realized by relevant detection system.
For the ease of whole self-adapting float clamp device being carried out performance evaluation, improve design, fault diagnosis, can utilize time domain to observe means such as calculating the fluid Dynamic Signal of this self-adapting float clamp device is carried out analysing and processing.
According to above design, the schematic representation that clamps chamber D pressure surge process in practical work process as shown in Figure 5, it has surveyed the pressure surge waveform that clamps chamber four cycles of D mouth place by the 10kHz sample frequency, sampling cumulative time is 0.25s.Among Fig. 5, chamber D begins into system pressure oil, right piston 3 left lateral, process puts in place in order to clamp for label 2, final pressure is 0.78MPa, the about 2s of right piston 3 left lateral holding times, mainly occur in the stage of label 3 among Fig. 5, about corresponding 0.38MPa, pressure does not rise on the contrary and slightly descends, and shows that right piston 3 overcomes resistance such as whole device initial frictional left lateral truly;
Label 4 among Fig. 5 (two places) the expression oil sprayer plunger 6 actual static pressure 0.78MPa that bear, more stable illustrative system relief valve YL is working properly; Right piston 3 diameters are 10cm, and the oil sprayer plunger 6 actual static pressures that bear are 6123N.
By label among Fig. 54 (two places) as can be seen, under the situation that stop valve JZ ends, bigger decline appears in the pressure that clamps chamber D, and in conjunction with label among Fig. 57 (stop valve JZ connects system pressure) as can be known, overall presure drop reaches about 0.35MPa in more than 70 second.Obviously revealing appears in right piston 3 rubber seals place, is example (this moment, cam rotated 30s) with the label 4 on the right, and the 15s internal drop is 0.1MPa, reaches 0.0066MPa/s.
Label 8 has reflected the clamping chamber D return pressure process that descends rapidly, puts in place among Fig. 5, among Fig. 5 label 9 reflected clamping chamber D loosen chamber B right piston 3 is promoted under the right lateral pressure maintaining period, mainly relevant with friction and piston motion speed that left piston 4 and right piston 3 are subjected to.
Label 6 parts are that cam motor starts oil sprayer commencement of fuel injection process among Fig. 5.
Above-mentioned engine fuel injector test stand by the related extending means of the multistage multichannel of assembled hydraulic oil cylinder, has satisfied the requirement of synchronous, the instantaneous clamping of the nozzle holder of different shape and size and movement parts; Carrying out orientation and the automatic control of electric liquid and oil pressure by the self adaption location of cam drive, pilot hole, oil nozzle bayonet socket and piston sleeve accurately controls, make oil sprayer in high speed large impact running, remain accurate effect stroke and point of action, and suitable active force; Detect and synchronous numerical control electromagnetic arrestment mechanism by cam position, realize the automatic location of cam in the oil sprayer clamping process.
The above only is a preferred implementation of the present invention; be noted that for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. the self-adapting float clamp device of an engine fuel injector test stand, it is characterized in that: this self-adapting float clamp device comprises cam mechanism and hydraulic control mechanism:
Described cam mechanism comprises cam (10) and follower lever (9), one end of described follower lever (9) contacts with the curved surface of cam (10), the other end is provided with the hold down gag that compresses the oil sprayer spring, and described cam (10) is installed on the camshaft, and camshaft location is fixed;
Described hydraulic control mechanism comprises intermediate piston (1), piston sleeve (2), left piston (4), right piston (3) and piston rod, described piston sleeve (2) fixed-site; Described intermediate piston is sleeved on the left piston (4), piston sleeve (2) is sleeved on intermediate piston (1) and the right piston (3), piston rod passes intermediate piston (1) bottom and the suitable hole of piston rod, and described left piston (4) and right piston (3) are fixed on the two ends of piston rod; In intermediate piston (1), the cavity between left piston (4) and intermediate piston (1) bottom is a Seal cage, and described Seal cage is connected with the Seal cage oil circuit; In piston sleeve (2), the cavity between intermediate piston (1) bottom and the right piston (3) is for loosening the chamber, describedly loosens the chamber and loosens the chamber oil circuit and be connected; In piston sleeve (2), the cavity between right piston (3) and piston sleeve (2) bottom is for clamping the chamber, and described clamping chamber is connected with clamping chamber oil circuit; Described left piston (4) is provided with the oil nozzle bayonet socket with the side that piston rod deviates from mutually.
2. the self-adapting float clamp device of engine fuel injector test stand according to claim 1, it is characterized in that: described Seal cage oil circuit is arranged on the intermediate piston (1), the described chamber oil circuit that loosens is arranged on the piston sleeve (2), and described clamping chamber oil circuit is arranged on the piston sleeve (2).
3. the self-adapting float clamp device of engine fuel injector test stand according to claim 1 is characterized in that: described self-adapting float clamp device also comprises the housing of placing the test specimen oil sprayer, and described housing and middle kink (2) fix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110004121 CN102042144A (en) | 2011-01-11 | 2011-01-11 | Self-adaptive floating clamping device for engine fuel injector testing stand |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110004121 CN102042144A (en) | 2011-01-11 | 2011-01-11 | Self-adaptive floating clamping device for engine fuel injector testing stand |
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| CN102042144A true CN102042144A (en) | 2011-05-04 |
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| CN 201110004121 Pending CN102042144A (en) | 2011-01-11 | 2011-01-11 | Self-adaptive floating clamping device for engine fuel injector testing stand |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330251A (en) * | 2014-10-29 | 2015-02-04 | 重庆科技学院 | Diesel engine hydraulic advance device performance test device and method |
| RU2542648C1 (en) * | 2013-10-11 | 2015-02-20 | Филюс Раисович Сафин | Injector test and adjustment bench |
| CN104895722A (en) * | 2015-06-09 | 2015-09-09 | 资阳蜀达科技有限公司 | Electronic oil injector testing stand |
| CN105545561A (en) * | 2015-12-18 | 2016-05-04 | 华南理工大学 | Jet oil collecting device based on detection experiment of Commins PT oil injector |
| CN109932167A (en) * | 2019-03-28 | 2019-06-25 | 唐山百川智能机器股份有限公司 | HXN5B locomotive fuel injector testing stand fixture |
| CN114263555A (en) * | 2021-09-09 | 2022-04-01 | 泰安九和智能设备有限公司 | Micro-ship engine fuel sprayer calibration equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4037468A (en) * | 1976-10-15 | 1977-07-26 | Leslie Hartridge Limited | Fuel injector testing apparatus |
| SU945487A1 (en) * | 1979-08-06 | 1982-07-23 | Калининградский технический институт рыбной промышленности и хозяйства | Method and apparatus for endurance testing of nozzle tip |
| CN2150347Y (en) * | 1992-12-12 | 1993-12-22 | 李海 | Oil sprayer driver |
-
2011
- 2011-01-11 CN CN 201110004121 patent/CN102042144A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4037468A (en) * | 1976-10-15 | 1977-07-26 | Leslie Hartridge Limited | Fuel injector testing apparatus |
| SU945487A1 (en) * | 1979-08-06 | 1982-07-23 | Калининградский технический институт рыбной промышленности и хозяйства | Method and apparatus for endurance testing of nozzle tip |
| CN2150347Y (en) * | 1992-12-12 | 1993-12-22 | 李海 | Oil sprayer driver |
Non-Patent Citations (1)
| Title |
|---|
| 《机床与液压》 20100228 曹晓光，杨永健 PTPL喷油器试验台夹紧液压缸活塞位置补偿*** 第38卷, 第4期 2 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2542648C1 (en) * | 2013-10-11 | 2015-02-20 | Филюс Раисович Сафин | Injector test and adjustment bench |
| CN104330251A (en) * | 2014-10-29 | 2015-02-04 | 重庆科技学院 | Diesel engine hydraulic advance device performance test device and method |
| CN104330251B (en) * | 2014-10-29 | 2020-04-03 | 重庆科技学院 | Diesel engine hydraulic advance device performance test device and test method |
| CN104895722A (en) * | 2015-06-09 | 2015-09-09 | 资阳蜀达科技有限公司 | Electronic oil injector testing stand |
| CN105545561A (en) * | 2015-12-18 | 2016-05-04 | 华南理工大学 | Jet oil collecting device based on detection experiment of Commins PT oil injector |
| CN105545561B (en) * | 2015-12-18 | 2018-06-22 | 华南理工大学 | It is a kind of that oily collection device is penetrated based on comings PT fuel injector test experiences |
| CN109932167A (en) * | 2019-03-28 | 2019-06-25 | 唐山百川智能机器股份有限公司 | HXN5B locomotive fuel injector testing stand fixture |
| CN114263555A (en) * | 2021-09-09 | 2022-04-01 | 泰安九和智能设备有限公司 | Micro-ship engine fuel sprayer calibration equipment |
| CN114263555B (en) * | 2021-09-09 | 2023-09-12 | 翟泉来 | Verification device for fuel spray nozzle of engine of miniature ship |
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Application publication date: 20110504 |