CN2061214U - Testing stand for oil pump of diesel engine - Google Patents
Testing stand for oil pump of diesel engine Download PDFInfo
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- CN2061214U CN2061214U CN 89204977 CN89204977U CN2061214U CN 2061214 U CN2061214 U CN 2061214U CN 89204977 CN89204977 CN 89204977 CN 89204977 U CN89204977 U CN 89204977U CN 2061214 U CN2061214 U CN 2061214U
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Abstract
The utility model relates to a testing stand for the oil pump of a diesel engine, which is characterized in that the test stand cancels the conventional measuring glass type filling machine comprising a measuring glass; a novel device for detecting the level of liquid and a motor speed regulator, with double closed loops, which comprises a plurality of integrated circuits are adopted; the device for detecting the level of liquid works by using the photoelectric principle. The two devices can output electric signals to the microcomputer high-voltage testing instrument for an oil pump of the test stand to process the test data in a microcomputer mode, and the test data can be displayed in a digital mode, and can be printed and output.
Description
The utility model has related to a kind of fuel injection pump tester that the diesel engine Injection Pump is detected.
Along with the reinforcement gradually of the attention of the growing tension of oil supply and environmental pollution problem, the correct running of the fueling injection equipment of diesel engine becomes more and more important.In order to reach optimum operation, minimum oil consumption is controlled the purpose that waste gas is discharged with doing one's utmost, and it also is very necessary calibrating oil-fired system in diesel engine production and using process as possible.For this reason, a lot of scholars are arranged both at home and abroad, research unit and manufacturer develop and have produced the diesel engine fuel injection pump tester of many kinds of models, are used to simulate the fuel injection quantity that the standardized test conditions of a cover is calibrated Injection Pump.Such as, the 12PSY55 type fuel injection pump tester that China Tai'an agricultural machinery testing installation factory produces, the 12PSD type fuel injection pump tester that Tangshan first machine tool plant produces, the 12PSJ55 type of Luoyang Polytechnical College's development and production and the fuel injection pump tester of 12PSD series all are to develop and produce in order to achieve the above object.The fuel injection pump tester of these several models all is same type.Its metering system all is the fuel injection quantity that a measuring cup assembly having adopted several burets to be combined into measures Injection Pump.A kind of metering method that very falls behind that this metering method is adopted when being the fifties.The shortcoming of this metering method is to test Injection Pump fuel oil is sprayed onto in the unlimited glass container, and its result can lose the fuel oil of a part of high atomisation and evaporate a part of light hydrocarbon.Simultaneously, because fluid has viscosity, in flowing, inevitable having sluggishness and depending on the measuring cup wall on the measuring cup wall.Its three, utilize operator's eyes to remove the reading value of the meniscus in the interpretation measuring cup, must have bigger reading error, precision is not high in a word.The seventies, some improvement have been done to this type of fuel injection pump tester by external some manufacturer, but these improve also and have just done bigger improvement on the speed control system in transmission system, and metering system has still adopted the metering method of this backwardness of buret, such as, the DPT-7A that Japan's " more flourish " Industrial Co., Ltd produces, DPT-7B, DPT-7C type fuel injection pump tester just belongs to this type.This counting cup meter system of commonly using except precision is not high, also has two shortcomings, promptly because metering generally is to be undertaken by good hundreds of kind pump shaft rotating speed, so process is slow, and because measuring cup can not send corresponding electrical signal according to oil mass, can not processing data so that show and record.On metering system, make more improvedly, probably to be the fuel injection pump tester of Britain HARTRIDGE company 2500 series of representing the level eighties of producing.The metering system of this fuel injection pump tester is to have adopted " piston measuring cup " system of a kind of being called.In this system, the fluid that sprays from Injection Pump flows in the control valve body, and piston is down pushed away the zero-bit of pushing up at buret, and keeps a constant back-pressure to lower part of piston by the air pressure of one 2 crust.The oil stream of ejection is controlled by fuel tap, and fuel tap is to be controlled by electric revolution indicator.Each calculate finish after, piston remains static on new position, operator just read scale on the buret according to the red pointer on the piston.After reading, apply the air pressure of one 5 crust in the piston bottom, piston is squeezed go back to the top of buret.This metering system although changed most of shortcoming of old-fashioned metering system, can't provide data display and recording electrical signal, simultaneously, still is not separated from the metering method of buret.
Aspect arrangements for speed regulation, exist many problems too.Such as, the 12PSY55 type fuel injection pump tester that Chinese Tai'an agricultural machinery testing installation factory produces is to adopt the form of speed-changing gear box gear shift to come speed change.It has two speed thresholds, and one is 0～1500 rev/min, and one is 0～3000 rev/min, for different tested Injection Pumps, select speed threshold in advance.This test stand also has one by hydraulic-pressure pump, the hydraulic continuously variable transmission that oil hydraulic motor and oil sucting valve are formed, and this stepless speed variator stable bad very easily broken down, and can not guarantee that the highi degree of accuracy of Injection Pump detects.The 12PSD55 type fuel injection pump tester that China's Hubei engine test instrument factory is produced is to have adopted the driven by motor speed differential clutch, reaches the purpose of stepless speed regulation again by silicon controlled rectifier, and this goes a step further beyond doubt.Although it is this method is desirable, concerning the stability of work, concerning the highi degree of accuracy of wanting to obtain Injection Pump detects data, still unsatisfactory.Therefore, provide a kind of working stability better, the speed governing better effects if, no mechanical type, the arrangements for speed regulation of no hydraulic pressure just become and have been necessary very much.
The purpose of this utility model exactly in order to overcome the shortcoming of above-mentioned known fuel injection pump tester, discloses and has a kind ofly made bigger improved diesel engine fuel injection pump tester aspect level detection and the arrangements for speed regulation.Cancel the habitual cup type liquid level sensor of amount of glass in its metering system, and utilized photovoltaic principals, designed a new liquid level sensor.This new liquid level sensor can provide an electrical signal of being handled by microcomputer, with the form of digital display, parameter is shown on testing instrument print.The arrangements for speed regulation that it is new, can make can both steady running under any speed conditions of rotating speed in operating range of tested Injection Pump.
The purpose of this utility model can reach by following measure: diesel engine fuel injection pump tester disclosed in the utility model, comprise: fuselage (12), motor (58), belt pulley (54) (59), v belt (60), main shaft (6), oil spout angle dial (2), worktable (11), tested Injection Pump fixing frame (10), liquid level sensor (9), standard oil injecting nozzle (8), universal wheels (7), pivoted arm (3), pivoted arm column (5), clip (4), speed regulation gear (55), side kinetic head (57), arrangements for speed regulation (18), fuel tank (13), high-pressure manometer (14), low pressure gauge (1), control cabinet (17), control panel (16), computer high pressure oil pump testing instrument (15).Wherein:
Fuselage (12)---the main body of this test stand is equipped with worktable (11), tested Injection Pump fixing frame (10), liquid level sensor (9) thereon, and motor (58) is housed within it; Fuel tank (13), belt pulley (54) (59), v belt (60), main shaft (6), speed regulation gear (55) etc.;
Motor (58)---be fixed on the base of fuselage (12), belt pulley (59) is housed on output shaft, v belt (60) is housed on the belt pulley (59);
Main shaft (6)---by the top of bearing fixing in fuselage (12), belt pulley (54) is housed on the main shaft (6), by the belt pulley (59) on v belt (60) and motor (58) output shaft, the rotation of motor (58) is passed to main shaft (6);
Speed regulation gear (55)---be contained on the main shaft (6), main shaft (6) passes the intermediate hole of speed regulation gear (55), stretches out outside the fuselage (12), and the head (57) that tests the speed is housed in the below of speed regulation gear (55);
Universal wheels (7)---be contained in main shaft (6) and stretch out a end outside the fuselage (12), can be connected with the axle of tested diesel engine Injection Pump (56);
Worktable (11)---be contained on the platform of fuselage (12), tested diesel engine Injection Pump (56) is installed on the fixing frame (10) on this worktable (11), the bottom of worktable (11) is equipped with a pivoted arm (3), and this pivoted arm (3) can rotate in certain scope;
Pivoted arm column (5)---its lower end is fixed on the pivoted arm (3), and its upper end is fixed with liquid level sensor (9) by a clip (4);
Fuel tank (13)---be the oil sources of this test stand, provide fuel oil to tested Injection Pump (56); Fuel tank (13) is installed on fuselage (12) underframe, joins by conduit and tested Injection Pump (56) and liquid level sensor (9);
Control cabinet (17)---an independent part of separating with fuselage (12), arrangements for speed regulation (18) and some other electrical apparatus element are housed in it, these devices and electrical apparatus element join by cable and the corresponding device that is contained on the fuselage (12), on control cabinet (17), control panel (16) is housed, is used to operate this test stand;
Computer high pressure oil pump testing instrument (15)---digital processing unit is placed on the top of control cabinet (17), is connected with control cabinet (17) with liquid level sensor (9) by cable.
Arrangements for speed regulation (18) have comprised input amplifier I, monostable flipflop II, amplifier III, wave filter IV, comparison amplifier V, field circuit VI, stabilized power supply VII and current feedback loop VIII, wherein:
The input amplifier I---it has comprised triode BG
1, resistance R
1, capacitor C
1With diode D
1～D
4Triode BG
1Base stage by the series connection resistance R
1Join triode BG with an end of a winding that tests the speed
1Emitter by the serial connection resistance R
5Join triode BG with the other end of a winding that tests the speed
1Collector electrode by the serial connection resistance R
2With V
+Join capacitor C
1With diode D
1, D
2And diode D
3, D
4Be attempted by the input end of input amplifier;
The amplifier III---comprised triode BG
2And resistance R
8, triode BG
2Base stage and resistance R
7An end join triode BG
2Collector electrode and V
+Join triode BG
2Emitter and resistance R
8An end be connected;
The wave filter IV---comprised inductance L, capacitor C
4, an end of inductance L and triode BG
2Emitter join and the other end and capacitor C
4Join, and this end of inductance L also passes through by resistance R
9～R
11, capacitor C
7, C
8The input B point of circuit of being formed and comparison amplifier joins;
The stabilized power supply VII---comprise transformer, intergrated circuit S
4～S
8, resistance R
35, R * 11, R * 12, R * 13, capacitor C
14～C
18, be a common mu balanced circuit.
It is characterized in that: described liquid level sensor (9), be by oil trap (20), external frame (21), inner gimbal (19), oil liquid leakage pipe (26) is formed, each oil trap is again by gauging tube (28), photoelectricity base (30) (37), phototube (29) (38), optical fiber (44) (46), fiber bench (47) (48), electro-optical source (32) (39), electric light source(-)holder (33) (41), armature (24), depression bar (22), Y-piece (23), oil extraction pin (62), oil spill pipe (27), adjusting screw (36) (61), base (25) is formed; This liquid level sensor (9) is mounted on the column (5) of a movably pivoted arm (3) that is connected with test stand worktable (11), oil trap (20) is mounted on the base (25) that is positioned on the inner gimbal (19), promptly the housing by oil trap (20)---the flange plate of gauging tube (28) bottom is installed on the base (25), fiber bench (47) (48) separately all is installed in the upper and lower of gauging tube (28), phototube (29) (38) is housed on fiber bench (47) (48), photoelectricity base (30) (37), optical fiber (44) (46), electro-optical source (32) (39) and electric light source(-)holder (33) (41); Be equipped with in the Lower Half of gauging tube (28) and regulate second level comparison amplifier and comprised intergrated circuit S
3, resistance R
23～R
24, diode D
10～D
15, capacitor C
12With potentiometer W
4The resistance R of serial connection
23, R
24With intergrated circuit S
32 pin join diode D
12, D
13, capacitor C
12And connect, and contact one end and the resistance R that connect
24An end join the other end and resistance R
25Join, and with intergrated circuit S
33 pin join; The feedback signal of current feedback loop VIII is passed through by resistance R
20～R
22And capacitor C
10～C
11The circuit of being formed is applied to integrated S
32 pin; The output of this comparison amplifier is through resistance R
26Offer the field circuit VI;
The field circuit VI of described composition arrangements for speed regulation (18) has comprised triode BG
3, BG
4, resistance R
29～R
34, diode D
14～D
16Triode BG
3Collector electrode and resistance R
31, R
32With triode BG
4Collector series connection, and and V
-Join triode BG
3Emitter and resistance R
30An end join resistance R
30With resistance R
33Serial connection, and be connected to motor; Triode BG
4Collector electrode and diode D
16An end, resistance R
34Join triode BG with motor
4Emitter and V-join;
The current feedback loop of described composition arrangements for speed regulation (18) has comprised resistance R
20～R
22, capacitor C
10～C
11Resistance R
20And capacitor C
10With resistance R
21～R
22And connecing, and resistance R in an end of contact and the field circuit
33D point in the circuit that joins with motor joins; The other end of contact is intergrated circuit S
32 pin join.
The purpose of this utility model can also reach by following measure: the gauging tube (28) of liquid level sensor (9) is made up of top cylinder (45) and doffing (43), the sectional shape of lower half portion of top cylinder (45) is circular, and the sectional shape of upper half part is semicircle.Upper and lower two parts are with the stepped form transition.The bottom of doffing (43) is by flange plate, circular neck and loudspeaker screw (36) (61); Armature (24) is fixed on the bottom of external frame (20), and Y-piece (23) is installed on it, and the termination of depression bar (22) is fixed on the Y-piece (23) by means of fastening piece, and its depression bar (22) can move up and down with moving of Y-piece (23); Oil extraction pin (62) and oil collecting pipe (49) all are installed on the base (25) that is positioned on the inner gimbal (19), are arranged side by side with gauging tube (28); Oil spill pipe (27) is installed in the top of gauging tube (28), and its mouth of pipe down;
Its feature also is: the monostable flipflop II of described arrangements for speed regulation (18) has comprised intergrated circuit S
1, resistance H
4～H
7, capacitor C
2～C
3, potentiometer W
1Intergrated circuit S
1Formed by 4 chips: resistance H
6Be connected on first chip and triode BG
1Collector electrode between capacitor C
2And resistance R
5Be connected between second and the 3rd chip, and resistance R
5An end and V
1Join; Capacitor C
3, resistance R
6With potentiometer W
1Be connected between third and fourth chip resistance R
6With potentiometer W
1Serial connection, potentiometer W
1An end with test the speed the head winding join resistance R
6An end and capacitor C
3An end join; Resistance R
7An end and the 4th chip join the triode BG in the other end and the amplifier circuit
2Base stage join;
The comparison amplifier V of described composition arrangements for speed regulation (18) has comprised first order comparison amplifier and the second level comparison amplifier that structural type is identical, and first order comparison amplifier has comprised intergrated circuit S
2, resistance R
12～R
15, diode D
5～D
6, D
8, D
9, voltage-stabiliser tube D
7, capacitor C
5With potentiometer W
2Potentiometer W
2An end and resistance R
12An end join resistance R
12The other end and V join diode D
5, D
6With voltage-stabiliser tube D
7Series connection, and and capacitor C
5With potentiometer W
2And connect; The resistance R of serial connection
15, R
14An end and the output of wave filter IV join, simultaneously and intergrated circuit S
22 pin join and its other end and potentiometer W
2Join; Intergrated circuit S
26 pin, pass through resistance R
17, R
25, R
24With intergrated circuit S
32 pin join; Mouthful shape body constitutes, and the sectional shape on its top is circular, and the outer surface car has screw thread, and the sectional shape at its middle part is semicircle.Upper, middle, and lower part is with the stepped form transition.Top cylinder (45) and doffing (43) fuse by a screwed adapter ring (35).The planar section of the top cylinder (45) of gauging tube (28) and the semi-circular cross-section of doffing (43) respectively is equipped with a fiber bench (47), (48).Upper curve at top cylinder (45) partly is connected with an oil spill pipe (27).Two adjusting screw (36), (61) are installed on doffing (43).Fiber bench (47), (48) are made up of cylindrical shell (31), (40) and the square body that has auricle (34) (42) separately of separately two diameters (comprising internal diameter and external diameter) inequality.There is a through hole in square body (34) (42) central authorities separately, are used to hold the optical fiber of manufacturing with glass material (46) (44).The endoporus of cylindrical shell (31) (40) is used to hold electro-optical source (32) (39), and electric light source(-)holder (33) (41) is connected on separately the cylindrical shell (31) (40).On each square body (34) (42), and have a groove on the face that band auricle end face parallels, be used for the display light optical fiber signaling.Optical fiber (46) (44) is " U " shape part making with glass material.In the through hole on its closed end insertion square body (34) (42) separately, and its part is stretched out in outside the end face of square body (34) (42) band auricle, and with glue that optical fiber (46) (44) is fixing, do not allow it move.Photoelectricity base (30) (47) is a plate, is drilled with a hole thereon.Be used to hold phototube (29) (38).Two end faces of photoelectricity base (30) (37) respectively have a wiring terminal, are used to connect two output conductors of phototube (29) (38).Phototube (29) (38) with two screw on the square body (34) (42) of fiber bench (47) (48) separately.Depression bar (22) is to be connected two Y-pieces (23) to go up (Fig. 3 only illustrates a Y-piece).These two Y-pieces (23) are installed in respectively on two armature (24) that are positioned at liquid level sensor (9) both sides.The position of depression bar (22) is just in the top of the oil extraction pin (62) of liquid level sensor (9).Lead when the energising of the coil (63) of armature (24) and to neutralize bar (22) when moving downward, compressing oil extraction pin (62) moves downward, and opens oil drain passage.One rectangular base (25) is arranged in liquid level sensor (9), be used to install the oil collecting pipe (49) of oil trap (20), oil extraction pin (62) and gauging tube (28).Lower Half in base (25), that prolongs base (25) has in a lateral direction that quantitatively the number with liquid level sensor oil trap (20) is identical, and with gauging tube (28), corresponding several length that put in order of oil extraction pin (62) and oil collecting pipe (49) are 79 millimeters blind hole (29).These blind holes and gauging tube separately, the oil circuit of oil extraction pin and oil collecting pipe communicates.The free end of blind hole (29) clogs with plug screw (50).Oil collecting pipe (49) is screwed on the right hole (51) of oil trap base (25) by guide holder, gauging tube (28) is installed in 4 screws on the left hole (53) of base (25) by means of the flange plate of self, and oil extraction pin (62) is installed in the neutral position (52) of oil trap base (25) with 4 screws by means of oil extraction needle stand (54).Oil collecting pipe (49) is that one one end is a horn mouth, the screwed metal tube of the other end.The monostable flipflop II of the arrangements for speed regulation of diesel engine fuel injection pump tester is by intergrated circuit S1, resistance R 4～R7, capacitor C 2～C3, potentiometer W1 forms, and its comparison amplifier V is by intergrated circuit S2, S3, resistance R 9～R28, capacitor C 6～C13, diode D5～D13, potentiometer W2～W5 forms.Its field circuit VI is by triode BG3, BG4, and resistance R 29～R34, diode D16 forms.Its current feedback loop VIII is a signal source of drawing from motor (58) output terminal D point, and this signal source will be applied on 2 pin of intergrated circuit S3 of comparison amplifier V.
Below in conjunction with accompanying drawing technique scheme is further described.
Fig. 1 and Fig. 2 diesel engine fuel injection pump tester outline drawing.
Fig. 3 diesel engine fuel injection pump tester control cabinet.
Fig. 4 diesel engine fuel injection pump tester liquid level sensor.
Fig. 5 diesel engine fuel injection pump tester oil trap sectional drawing.
Fig. 6 diesel engine fuel injection pump tester liquid level sensor base sectional drawing.
Fig. 7 diesel engine fuel injection pump tester liquid level sensor depression bar connection diagram.
Fig. 8 diesel engine fuel injection pump tester kinematic scheme.
Fig. 9 diesel engine fuel injection pump tester arrangements for speed regulation circuit theory diagrams.
Fig. 1 and Fig. 2 are the shape assumption diagrams of diesel engine fuel injection pump tester disclosed in the utility model.As can be seen from the figure, except the structure of known diesel engine fuel injection pump tester, disclose the mounting point of characteristic liquid level sensor of the present utility model (9), promptly liquid level sensor has been fixed on the column (5) of a pivoted arm that is connected with worktable (3) by a clip (4).And the upper-lower position of this device can be regulated by the position of mobile clip (4).
As can be seen, the liquid level sensor of diesel engine fuel injection pump tester disclosed in the utility model (9) is by inner gimbal (19) from Fig. 4 and Fig. 5, and external frame (21) and several oil traps (20) are formed.Each oil trap (20) is again by gauging tube (28), photoelectricity base (30) (37), phototube (29) (38), optical fiber (44) (46), fiber bench (47) (48), electro-optical source (32) (39), electric light source(-)holder (33) (41), title (24), Y-piece (23), depression bar (22), oil extraction pin (62), oil collecting pipe (49), oil spill pipe (27), adjusting screw (36) (61), base (25), standard oil injecting nozzle (8) is formed.Gauging tube (28) is a metalwork.It is made up of top cylinder (45) and doffing (43) two parts, just can fuse this two part by a threaded adapter ring (35).On the curved portion of the semi-circular cross-section of upper half part of top cylinder (45), promptly on the side of the direction of worktable (11), " oil spill pipe of " " type (27) is used for overflowing too much fluid in the gauging tube (28) to be equipped with one.The planar section of two semi-circular cross-section up and down at gauging tube (28) respectively is equipped with a fiber bench (47) (48).The bottom of doffing (43) is a flange plate, and 4 screw holes are arranged on the flange plate.Be circular thin neck above the flange plate, on this neck, be drilled with a hole, adjusting screw (61) is installed.On the neck, be a bell mouth shape body.On the bell mouth shape body, for sectional shape is semicircular doffing (43) middle part.Herein, fiber bench (48) is installed.The sectional shape on the top of doffing (43) is circular, and its outer surface car has screw thread.Whole gauging tube is by means of the flange plate of doffing (43) and 4 screws, is fixed on the base (25).Fiber bench (47) (48) is mounted on the gauging tube (28), and correct installment state is that the axis of fiber bench (47) (48) should be perpendicular to the axis of gauging tube (28).Each fiber bench is made up of the cylindrical shell (31) (40) and the square body (34) (42) of two diameter differences (comprising internal diameter, external diameter).There are two auricles the bottom surface of its square body (34) (42), respectively is drilled with a hole on the auricle.Fiber bench (47) (48) is by means of the auricle and the screw of square body (34) (42) are installed on the gauging tube (28) separately.Cylindrical shell (31) (40) and its square body (34) (42) of fiber bench (47) (48) are connected as a single entity by two screws.After installing, screw head is sealed with glue.The central authorities of the square body (34) (42) of fiber bench (47) (48) respectively are drilled with a through hole, and optical fiber (46) (44) is installed in separately the through hole.Cylindrical shell (31) (40) part in fiber bench (47) (48), one electro-optical source (32) (39) is installed, on its cylindrical shell (31) (40), an electric light source(-)holder (33) (41) also is installed, and electric light source(-)holder (33) (41) closely is connected with cylindrical shell (31) (40) with screw.Electric light source(-)holder (33) (41) is made with insulating material.On the square body (34) (42) of fiber bench (47) (48), and have on the parallel end face of the end face (face promptly is connected with gauging tube (28)) of auricle, have a groove with square body (34) (42).The position of this groove should be positioned on the center line of this end face, and its length is 1/2 of square body (34) (42) length of side.Optical fiber (46) (44) is made with glass material, and it is shaped as " ∪ " type.The closed end of " ∪ " type optical fiber (46) (44) inserts in the through hole of square body (34) (42), and its part is stretched out outside the end face of square body band auricle.After optical fiber (46) (44) installs, with its partial fixing that stretches out, optical fiber (46) (44) can not be moved with glue.Photoelectricity base (30) (37) is a plate, makes with insulating material.Have a hole onboard, be used to hold phototube (29) (38).A wiring terminal respectively is equipped with in the both sides of photoelectricity base (30) (37), and the output conductor of phototube (29) (38) and the lead that leads to computer high pressure oil pump testing instrument all are to be connected on these two wiring terminals, are used to transmit electrical signal.Phototube (29) (38) is to be fixed on the length and width size thin insulating plate identical with fiber bench square body (34) (42).Photoelectricity base (30) (37) is screwed on the fiber bench square body (34) (42) together with the thin insulating plate of fixed light fulgurite.Can find out also that from Fig. 4 the structure of two fiber bench all is identical with connecting means.
Fig. 6 shows the sectional drawing of liquid level sensor base (25).Base (25) is that a rectangular metallic material is manufactured, and its length is decided by the number of oil trap.After having the same number of oil trap of its number and oil trap to install on this base (25), be used to connect gauging tube (28), oil extraction pin (62) and oil collecting pipe (49).Gauging tube (28) is connected on the left hole (53) of base by flange plate and 4 screws, oil extraction pin (62) is the intermediate hole (52) that is connected base by oil extraction needle stand and 4 screws, and oil collecting pipe (49) is gone up (position of above-mentioned left center right is by the position shown in Fig. 5 sectional drawing) by the right hole (51) that guide holder is connected base.Lower Half in base (25) is prolonged base (25) horizontal direction, and number is identical with the number of gauging tube, and with each gauging tube, on the corresponding position of the arrangement position of oil extraction pin and oil collecting pipe, have several blind holes (29) of long 79 millimeters.Each blind hole (29) all with each self-corresponding gauging tube, the oil extraction pin, the oil circuit of oil collecting pipe communicates.The free end of blind hole (29) has been attacked screw thread, and at this end plug screw (50) is housed.Oil collecting pipe (49) is that one one end is a horn mouth, the screwed metal tube of the other end.The horn mouth of oil collecting pipe (49) should just in time be aimed at the oil spout outlet of oil injecting nozzle (8), but does not directly link together.
Fig. 7 shows depression bar (22) the connection situation of liquid level sensor (9).Depression bar (22) is a strip shape body, and its length is greater than the length of base (25).Depression bar (22) available metal material is manufactured.The two ends of depression bar (22) are screwed onto two Y-pieces (23) and go up (Fig. 6 only shows the connection Y-piece of a side).Y-piece (23) is mounted in again on the armature (24).Armature coil (63) communicates with power supply.The mounting point of depression bar (22) is in the top of the oil extraction pin (62) of liquid level sensor (9) just.When armature coil (63) energising, depression bar (22) is when moving downward, and compressing oil extraction pin (62) also moves downward, so that open oil outlet passage.
Below again in conjunction with the job step of Fig. 1-Fig. 7 with example explanation diesel engine fuel injection pump tester liquid level sensor.
When detecting the work of diesel engine Injection Pump, when promptly detecting the fuel injection quantity of Injection Pump (56), earlier tested Injection Pump (56) is installed on the fixing frame (10) on the worktable (11), and connect with the universal joint (7) that links to each other with main shaft (6) of test stand, again the oil sprayer of tested Injection Pump (56) and the oil injecting nozzle (8) of liquid level sensor (9) are joined, actuating motor (58) allows tested Injection Pump (56) work.After Injection Pump (56) running, ejection fluid enters oil collecting pipe (49) through oil injecting nozzle (8), passes through the blind hole (29) on the base (25) again, enters gauging tube (28).Along with the oil spout number of times increase of tested Injection Pump, the fluid liquid level in the gauging tube (28) rises.Under the idling work condition, behind tested Injection Pump oil spout several times, fluid liquid level in the gauging tube (28) rises to the optical fiber (44) that is installed on gauging tube (28) doffing (43) and locates, and just cross this optical fiber (44) (this moment gauging tube (28) in the fluid amount be 4 milliliters), cut off the path of optical fiber (44) optical signal, make optical fiber (44) be in not on-state, the output of non-fiber signal.As a result, the phototube (38) that is installed on the fiber bench (48) does not just receive fiber-optic signal yet, is in not on-state yet.At this moment, the signal of this not conducting passes to computer high pressure oil pump testing instrument by lead, through microcomputer processing, the fuel injection quantity (under the idling situation) when converting tested Injection Pump oil spout 100 times to passes through testing instrument, form with digital display is presented on the testing instrument, and is printed on the registration paper.At this moment, can judge whether this tested Injection Pump meets code requirement, does not meet code requirement, regulates tested Injection Pump according to video data, examination more afterwards is till satisfaction.If when checking the fuel injection quantity of the Injection Pump under other speed conditions, working procedure is with last identical, the optical fiber (46) that only is positioned at gauging tube top cylinder (45) is in not on-state (at this moment, fluid in the gauging tube (28) is 40 milliliters), phototube (29) is transferred to microcomputer with this signal, handle, fuel injection quantity when demonstrating under this speed conditions 100 oil spouts of tested Injection Pump on the testing instrument (15), afterwards, compare again with the standard fuel injection quantity, when not meeting standard, regulate tested Injection Pump (56), when meeting standard till.
Fig. 8 shows the kinematic scheme of diesel engine fuel injection pump tester disclosed in the utility model, and Fig. 8 shows the circuit theory diagrams of diesel engine fuel injection pump tester transmission system arrangements for speed regulation disclosed in the utility model.As can be seen from Figure 7, test stand disclosed in the utility model does not have the mechanical type gear of this type of speed-changing gear box.As can be seen from Figure 8, test stand transmission system arrangements for speed regulation disclosed in the utility model are different from known test stand transmission system arrangements for speed regulation.
Fig. 9 shows the circuit theory diagrams of diesel engine fuel injection pump tester arrangements for speed regulation.As can be seen from the figure, diesel engine fuel injection pump tester arrangements for speed regulation disclosed in the utility model are by the input amplifier I, the monostable flipflop II, the amplifier III, wave filter IV, comparison amplifier V, the field circuit VI, the stabilized power supply VII, the current feedback loop VIII is formed.As shown in Figure 8, the input amplifier I is by triode BG1, resistance R 1, and 1,4 diode D1-D4 of capacitor C forms.The signal input part of input amplifier is to draw from the head (57) that tests the speed, one is connected to the base stage of triode BG1, the emitter of the other end and triode BG1 joins, capacitor C 1 and diode D1, D2, and diode D3, D4 are connected in parallel on the input end of input amplifier.Input signal passes to the monostable flipflop II with signal after amplifying through BG1.The monostable flipflop II is by intergrated circuit S1, resistance R 4～R7, and capacitor C 2～C3, potentiometer W1 forms.From the signal of input amplifier output, through monostable flipflop, it is more stable to make it the signal that attracts from the head (57) that tests the speed, obtains a stable waveform, and offers next stage amplifier III.The amplifier III is made up of triode BG2 and resistance R 8.Because triode BG2 is a N-P-N transistor npn npn, so the stable waveform signal that comes from monostable flipflop further can be amplified.Then, through the wave filter IV filtering of being made up of inductance L and capacitor C 4, pass through resistance R 9～R11 again, capacitor C 7 is applied to the B point that 2 pin of comparison amplifier V intergrated circuit S2 link to each other.The comparison amplifier V is by intergrated circuit S2, S3, and resistance R 9～R28, capacitor C 6～C13, diode D5～D13, potentiometer W2～W5 forms.When the signal that comes from wave filter is applied to the B point that 2 pin with intergrated circuit S2 join, this signal will with by resistance R 12～R13, diode D5～D6, voltage-stabiliser tube D7, the signal that capacitor C 5 and potentiometer W2 are provided is compared by this comparison amplifier V.2 pin and 3 pin diode connected in parallel D8, D9 with intergrated circuit S2 its role is to make the signal that offers intergrated circuit S2 to carry out amplitude limit.After comparison through intergrated circuit S2, pass through the amplitude limit of potentiometer W4 again, signal is offered intergrated circuit S3 carry out the second level relatively, amplify.Carry out second level amplitude limit through potentiometer W6 again, signal is offered the field circuit VI.The field circuit VI is by triode BG3, BG4, resistance R 29～R34, and diode D14～D16 forms.Triode BG3 is the P-N-P transistor npn npn, and BG4 is the N-P-N transistor npn npn.Signal is through intergrated circuit S2, and the comparison amplifier that S3 formed compares, and relatively the signal after is input to the field circuit VI, amplify through field circuit, provide a speed governing required, stable electrical signal is given motor, regulates motor speed to required rotating speed.Voltage-stabilized power supply circuit VII (given voltage is provided) is the alternating voltage with 220 volts, and through after the transformation, the one tunnel through resistance R * 13, R35, and capacitor C 18 and rectifier lamp S8 are applied to the V of field circuit
-(60V), for BG3, BG4 amplifies usefulness, and another road is through resistance R * 11, R * 12 with the earth point that is positioned at diode D14 place, capacitor C 14～C17, intergrated circuit S5, S7, rectifier lamp S4, S6 is applied to the V+ in the circuit, on the V-two ends (± 15V), use on the power supply road.The current feedback loop VIII is that the D point from the output terminal of motor is drawn a signal source, pass to 2 pin of intergrated circuit S3, its purpose is, cause with the less variation of rotating speed, and the electrical signal that has passed through 2 pin of the after-applied intergrated circuit S3 of giving of circuit before the intergrated circuit S3 is compared, pass through field circuit again, provide one to correct the required stable electrical signal of this less rotation speed change, make motor speed become stable to motor.
Working condition when illustrating that in conjunction with Fig. 8 and Fig. 9 these arrangements for speed regulation are dynamic and static more below.When static state, a no signal output of testing the speed, the voltage feed back wave filter is output as zero.Potentiometer W2 output also is zero, intergrated circuit S2, and the output of the comparison amplifier that S3 formed also is zero, field circuit ends, no excitation output.When dynamic, when regulating potentiometer W2, at the 2 pin place impacts of intergrated circuit S2 a negative level, intergrated circuit S2 is saturated, exports a positive level.And through behind the intergrated circuit S3, output then is a negative level.Field circuit work provides excitation signal to motor, and motor begins rotation, and simultaneously, the head that tests the speed is measured tach signal.If this moment, rotating speed needs to increase, this signal is sent into the monostable flipflop II after input amplifier BG1 amplifies, through intergrated circuit S1, make from the next signal of head that tests the speed more stable, and send into amplifier III and wave filter IV, behind BG2 and lc circuit, obtain a positive level, send into 2 pin of comparison amplifier V intergrated circuit S2, and compare with the negative level of potentiometer W2 output.When it was lower than the level value of preset level, the output of intergrated circuit S2 still was positive level, still was negative level through the output of intergrated circuit S3, field circuit is still in running order, provides excitation signal to motor, and motor speed is increased, if when opposite with above-mentioned situation, rotating speed then reduces.If for a certain reason, rotating speed has improved, and the signal of the head output of testing the speed is through the input amplifier I, the monostable flipflop II, the amplifier III increases feedback voltage, is added to the comparison amplifier V through filtering, compare with the output of potentiometer W2, the output of comparison amplifier is reduced, the output current of field circuit is reduced, then impel rotating speed to descend.Otherwise the output current of field circuit increases, and rotating speed improves, thus the stabilization of speed of making.Therefore, certain when given voltage, it is stable that rotating speed just can reach.Add, again currrent feedback has been arranged after, make rotating speed more stable.
The arrangements for speed regulation of diesel engine fuel injection pump tester disclosed in the utility model are said simplerly, are to have adopted double loop speed-regulating system, ring and voltage-regulation outer shroud in promptly electric current is regulated.Owing to adopted the regulating system of this uniqueness, make this test stand transmission system, under any rotating speed (0-2400 rev/min), can both stable operation.
The utility model has been owing to adopted above-mentioned structure and operation principle, thereby had following advantage:
1, cancelled the cup type metering system of amount of glass, adopted according to photovoltaic principals design Novel liquid level sensor, thus make certainty of measurement substantially exceed the certainty of measurement of traditional type structure, the good reproducibility of level detection, functional reliability height.
2, arrangements for speed regulation working stability can stepless speed regulation, and the automatic stabilisation rotating speed has improved operating efficiency.
3, can provide the signal of telecommunication to microsystem, thereby can adopt microcomputer technology to gauging, temperature etc. are controlled automatically.
4, rational in infrastructure, sealing is reliable, and noise is little, and is easy to operate.
5, test result can adopt centralized numerical display, and printer is printed.
Claims (11)
1, a kind of diesel engine fuel injection pump tester, it comprises:
Fuselage, motor, belt pulley, v belt, main shaft, oil spout angle dial, worktable, tested Injection Pump fixing frame;
Liquid level sensor, standard oil injecting nozzle, universal wheels, pivoted arm, pivoted arm column, clip;
Speed regulation gear, test the speed the head, arrangements for speed regulation;
Fuel tank, high-pressure manometer, low pressure gauge;
Control cabinet, control panel, computer high pressure oil pump testing instrument; Wherein:
The main body of fuselage-this test stand is equipped with worktable, tested Injection Pump fixing frame, liquid level sensor thereon, and motor is housed within it; Fuel tank, belt pulley, v belt, main shaft, speed regulation gear etc.;
Motor-be fixed on the base of fuselage is equipped with belt pulley on output shaft, v belt is housed on the belt pulley;
Main shaft-by the top of bearing fixing at fuselage, belt pulley is housed on the main shaft by the belt pulley on v belt and the motor output shaft, passes to main shaft with the rotation of motor;
Speed regulation gear-be contained on the main shaft, main shaft passes the intermediate hole of speed regulation gear, stretches out outside the fuselage, and the head that tests the speed is housed below speed regulation gear;
Universal wheels-be contained in main shaft stretches out the end outside the fuselage, can start with tested diesel oil
The axle of machine Injection Pump is connected;
Worktable-be contained on the platform of fuselage, tested diesel engine Injection Pump are installed on the fixing frame on this worktable, and the bottom of worktable is equipped with a pivoted arm, and this pivoted arm can rotate in certain scope;
Pivoted arm column-its lower end is fixed on the pivoted arm, and its upper end is fixed with liquid level sensor by a clip;
Fuel tank-be the oil sources of this test stand, provide fuel oil to tested Injection Pump; Fuel tank is installed on the fuselage underframe, joins by conduit and tested Injection Pump and liquid level sensor;
An independent part of control cabinet-separate with fuselage, arrangements for speed regulation and some other electrical apparatus element are housed in it, and these devices and electrical apparatus element join by cable and the corresponding device that is contained on the fuselage, on control cabinet, control panel is housed, is used to operate this test stand;
Computer high pressure oil pump testing instrument-digital processing unit is placed on the top of control cabinet, is connected with control cabinet with liquid level sensor by cable;
Arrangements for speed regulation have comprised input amplifier I, monostable flipflop II, amplifier III, wave filter IV, comparison amplifier V, field circuit VI, stabilized power supply VII and current feedback loop VII, wherein:
It has comprised triode BG input amplifier I-
1, resistance R
1, capacitor C
1With diode D
1～D
4Triode BG
1Base stage by the series connection resistance R
1Join triode BG with an end of a winding that tests the speed
1Emitter by the serial connection resistance R
3Join triode BG with the other end of a winding that tests the speed
1Collector electrode by the serial connection resistance R
2With V
+Join capacitor C
1With diode D
1, D
2And diode D
3, D
4Be attempted by the input end of input amplifier;
Amplifier III-comprised triode BG
2And resistance R
8, triode BG
2Base stage and resistance R
7An end join triode BG
2Collector electrode and V
+Join triode BG
2Emitter and resistance R
8An end be connected;
Wave filter IV-comprised inductance L, capacitor C
4, an end of inductance L and triode BG
2Emitter join and the other end and capacitor C
4Join, and this end of inductance L also passes through by resistance R
9～R
11, capacitor C
7, C
8The input B point of circuit of being formed and comparison amplifier joins;
Stabilized power supply VII-comprise transformer, intergrated circuit S
4～S
8, resistance R
35, R * 11, R * 12, R * 13, capacitor C
14～C
18, be a common mu balanced circuit;
It is characterized in that:
A, described liquid level sensor, form by oil trap, internal and external frame, oil trap is again by gauging tube, photoelectricity base, phototube, optical fiber, fiber bench, electro-optical source, electric light source(-)holder, armature, depression bar, and Y-piece, oil extraction pin, oil collecting pipe, oil spill pipe, adjusting screw, base are formed; This liquid level sensor is to be equipped with on the column of a movably pivoted arm that is connected as platform with test stand, oil trap is mounted on the base that is positioned on the inner gimbal, promptly the flange plate of the housing-gauging tube bottom by oil trap is installed on the base, fiber bench separately all is installed in the upper and lower of gauging tube, phototube, photoelectricity base, optical fiber, electro-optical source and electric light source(-)holder is housed in fiber bench; Lower Half at the gauging tube is equipped with adjusting screw; Armature is fixed on the bottom of external frame, and Y-piece is installed on it, and the termination of depression bar is fixed on the Y-piece by means of fastening piece, and its depression bar can move up and down with moving of fork-shaped year; Oil extraction pin and oil collecting pipe all are equipped with on the base that is positioned on the inner gimbal, are arranged side by side with the gauging tube; Oil spill pipe is installed in the top of gauging tube, and its mouth of pipe down;
The monostable flipflop II of B, described composition speeder has comprised intergrated circuit S
1Resistance R
4～R
7, capacitor C
2～C
3, potentiometer W
1Intergrated circuit S
1Formed resistance R by 4 chips
4Be connected on first chip and triode BG
1Collector electrode between, capacitor C
2And resistance R
5Be connected between second and the 3rd chip, and resistance R
5An end and V
+Join; Capacitor C
3, resistance R
6With potentiometer W
1Be connected between third and fourth chip resistance R
6With potentiometer W
1Serial connection, potentiometer W
1An end with test the speed the head winding join resistance R
6An end and capacitor C
3An end join; One end of resistance R 7 and the 4th chip join the triode BG in the other end and the amplifier circuit
2Base stage join;
The comparison amplifier V of described composition arrangements for speed regulation has comprised the first order comparison amplifier that structural type is identical and second ultimate ratio than amplifier, and first ultimate ratio has comprised intergrated circuit S than amplifier
2, resistance R
12～R
13, diode D
5～D
6, D
8, D
9, voltage-stabiliser tube D
7, capacitor C
5With potentiometer W
2Potentiometer W
2An end and resistance R
12An end join resistance R
12The other end and V
-Join diode D
5, D
6With voltage-stabiliser tube D
7Series connection, and and capacitor C
5With potentiometer W
2And connect; The resistance R of serial connection
13, R
14An end and the output of wave filter IV join, simultaneously and intergrated circuit S
22 pin join and its other end and potentiometer W
2Join; Intergrated circuit S
22 pin, pass through resistance R
17, R
23, R
24With intergrated circuit S
32 pin join; Second level comparison amplifier has comprised intergrated circuit S
3, resistance R
23～R
24, diode D
10～D
13, capacitor C
12With potentiometer W
4The resistance R of serial connection
23, R
24With intergrated circuit S
32 pin join diode D
12, D
13, capacitor C
12And connect, and contact one end and the resistance R that connect
24An end join the other end and resistance R
25Join, and with intergrated circuit S
33 pin join; Electric current passes through by resistance R with the feedback signal of feedback control loop VIII
20～R
22And capacitor C
10～C
11The circuit of being formed is applied to integrated S
32 pin; The output of this comparison amplifier is through resistance R
28Offer the field circuit IV;
The field circuit VI of described composition arrangements for speed regulation has comprised triode BG
3, BG
4, resistance R
29～R
34, diode D
14～D
16Triode BG
3Collector electrode and resistance R
31, R
32With triode BG
4Collector series connection, and and V
-Join triode BG
3Emitter and resistance R
30An end join resistance R
30With resistance R
33Serial connection, and be connected to motor; Triode BG
4Collector electrode and diode D
16An end, resistance R
34Join triode BG with motor
4Emission V very
-Join;
The current feedback loop of described composition arrangements for speed regulation has comprised resistance R
20～R
22, capacitor C
10～C
11Resistance R
20And capacitor C
10With resistance R
21～R
22And connecing, and resistance R in an end of contact and the field circuit
33D point in the circuit that joins with motor joins; The other end of contact is intergrated circuit S
32 pin join;
2, diesel engine fuel injection pump tester as claimed in claim 1, it is characterized in that: the gauging tube of liquid level sensor is made up of top cylinder and doffing, the sectional shape of lower half portion of top cylinder is circular, and the sectional shape of upper half part is semicircle, and top and the bottom are with the form transition of step; The bottom of doffing is made of flange plate, circular neck and horn-like body, and the sectional shape on its top is circular, and the outer surface car has screw thread, and the sectional shape at its middle part is semicircle, and middle part and upper and lower part are with the stepped form transition; Top cylinder and doffing fuse by means of a screwed adapter ring.
3, diesel engine fuel injection pump tester as claimed in claim 1 is characterized in that: the planar section of the gauging tube top cylinder of described liquid level sensor and the semi-circular cross-section of doffing part is equipped with a fiber bench; On the curvature portion on the top of top cylinder, be connected with an oil spill pipe; Two adjusting screw are installed on doffing.
4, diesel engine fuel injection pump tester as claimed in claim 1 is characterized in that: the fiber bench of described liquid level sensor is made up of cylindrical shell and a square body that has auricle of two diameters (comprising external diameter and internal diameter) inequality; There is a through hole in the central authorities of square body, are used to hold the optical fiber of manufacturing with glass material; The endoporus of cylindrical shell is used to hold electro-optical source, connects the electric light source(-)holder on its outer surface; On the fiber bench square body, and have a groove on the face that band auricle end face parallels, be used for the display light optical fiber signaling.
5, diesel engine fuel injection pump tester as claimed in claim 1, it is characterized in that: the optical fiber of described liquid level sensor is " U " part made from glass material, its closed end inserts in the through hole of fiber bench square body, and its part is stretched out in outside the end face of square body band auricle, and with glue the optical fiber of its extension is fixed, making it optical fiber can not move.
6, diesel engine fuel injection pump tester as claimed in claim 1 is characterized in that: the photoelectricity base of described liquid level sensor is a plate, is drilled with a hole thereon, is used to hold phototube; The biend of photoelectricity base respectively has a wiring terminal, is used to connect two output conductors of phototube; The photoelectricity base with two screw on the square body of fiber bench.
7, diesel engine fuel injection pump tester as claimed in claim 1 is characterized in that: the depression bar of described liquid level sensor is to be connected on two Y-pieces, and these two Y-pieces are installed in respectively on two armature that are positioned at the liquid level sensor both sides; Just above liquid level sensor oil extraction pin, when depression bar moved downward, compressing oil extraction pin moved downward, and opens oil drain passage in the position of depression bar.
8, diesel engine fuel injection pump tester as claimed in claim 1 is characterized in that: a rectangular base is arranged in the described liquid level sensor, be used to install oil collecting pipe, oil extraction pin and gauging tube; In the Lower Half of base, that prolongs base has in a lateral direction that quantitatively the number with the liquid level sensor oil trap is identical, and with the gauging tube, corresponding several length that put in order of oil extraction pin and oil collecting pipe are 79 millimeters blind hole; These blind holes and gauging tube separately, the oil circuit of oil extraction pin and oil collecting pipe communicates; The free end of blind hole clogs with plug screw.
9, diesel engine fuel injection pump tester as claimed in claim 1 is characterized in that: the oil collecting pipe of described liquid level sensor is screwed on the right hole of oil trap base by guide holder; The gauging tube is installed on the left hole of base by the flange plate of self with 4 screws; The oil extraction pin is installed in the neutral position of oil trap base with 4 screws by means of the oil extraction needle stand.
10, diesel engine fuel injection pump tester as claimed in claim 1 is characterized in that: the oil collecting pipe of described liquid level sensor is that one one end is a horn mouth, the screwed metal tube of the other end.
11, diesel engine fuel injection pump tester as claimed in claim 1 is characterized in that: the signal source of the current feedback loop of described arrangements for speed regulation for drawing from motor, this signal source will be applied to the intergrated circuit S of comparison amplifier
3On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89204977 CN2061214U (en) | 1989-05-30 | 1989-05-30 | Testing stand for oil pump of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89204977 CN2061214U (en) | 1989-05-30 | 1989-05-30 | Testing stand for oil pump of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2061214U true CN2061214U (en) | 1990-08-29 |
Family
ID=4862211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89204977 Withdrawn CN2061214U (en) | 1989-05-30 | 1989-05-30 | Testing stand for oil pump of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2061214U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251956A (en) * | 2011-05-09 | 2011-11-23 | 南车戚墅堰机车有限公司 | Main lubricating oil pump test device |
| CN106593738A (en) * | 2016-12-23 | 2017-04-26 | 重庆市合川区九峰煤炭有限公司 | Auxiliary calibration device for diesel engine fuel injection pump for mining |
-
1989
- 1989-05-30 CN CN 89204977 patent/CN2061214U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251956A (en) * | 2011-05-09 | 2011-11-23 | 南车戚墅堰机车有限公司 | Main lubricating oil pump test device |
| CN106593738A (en) * | 2016-12-23 | 2017-04-26 | 重庆市合川区九峰煤炭有限公司 | Auxiliary calibration device for diesel engine fuel injection pump for mining |
| CN106593738B (en) * | 2016-12-23 | 2019-04-02 | 重庆市合川区九峰煤炭有限公司 | A kind of mining auxiliary device of diesel engine fuel injecting calibration of pump |
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|---|---|---|---|
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |