CN2240047Y - Electronic oil quantity switch - Google Patents
Electronic oil quantity switch Download PDFInfo
- Publication number
- CN2240047Y CN2240047Y CN 95212605 CN95212605U CN2240047Y CN 2240047 Y CN2240047 Y CN 2240047Y CN 95212605 CN95212605 CN 95212605 CN 95212605 U CN95212605 U CN 95212605U CN 2240047 Y CN2240047 Y CN 2240047Y
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- CN
- China
- Prior art keywords
- signal
- switch
- voltage
- diesel engine
- switching tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an electronic oil quantity switch, which relates to the protection of the diesel engine of the diesel locomotive, belonging to the protective switch of the diesel engine in the working condition with high capacity and low oil pressure. The utility model is characterized in that the utility model is composed of an electric part and a casing, the signal of the electric part can take samples directly from a speed indicating generator, the received signal is compared with a stable electric potential after the isolating treatment, the rectifying treatment and the filtering treatment, the magnet coil of a direct-current electromagnetic relay is directly connected with the collecting electrode of a switching tube, a normally closed contact is connected in the oil pressure protection circuit with high capacity, and the power supply cord is provided with a voltage-stabilizing circuit and a protection circuit. The utility model has the advantages of simple structure, accurate sample of signal, high interference immunity, stable and reliable performance and long service life, and is an ideal oil pressure protection circuit with high capacity of the diesel engine of the diesel locomotive.
Description
The utility model relates to the protection of diesel engine of diesel locomotive, and it belongs to a kind of protective switch of diesel engine when high capacity low oil pressure operating mode.
At present; the guard method of the heart-diesel engine of China's protection internal combustion locomotive; the organic oil pressure protect; the water temperature protection; crankcase explosive-proof protector etc.; in the engine oil pressure protective circuit; there is the protection of diesel engine high capacity oil pressure (to see Fig. 1 again; Fig. 2) its action principle is: when diesel engine (is equivalent to the step speed regulation diesel engine more than 8 in the high capacity operating mode; the stepless speed regulation diesel engine speed is 750 γ/min; about 8 grooves of Injection Pump control rack) time; be installed in the normally open contact closure of the oil mass switch UK under the diesel engine fuel feeding pull bar taper sheath; make auxiliary reclay 1ZJ coil get electronic work; the normally closed interlock of 1ZJ disconnects; electric current is through oil pressure relay 1YJ; the contact of 2YJ is to the coil power supply of exciter excitation contactor LLC and main generator excitation contactor, thereby makes 1YJ; 2YJ enters protective circuit work.If this moment, the machine oil inlet pressure of any one pressurized machine was lower than 156.8KPa, corresponding 1YJ or 2YJ are discharged, its normally open contact disconnects, and cuts off the power supply circuits of LC, LLC coil, makes the diesel engine unloading and is protected.
Now the oil mass switch UK of Shi Yonging is actually a mechanical stroke switch, and it is contained near the below of the fuel feeding pull bar taper sheath of diesel engine 9 cylinders, by the break-make that its roller type handle of extruding is realized switch that moves horizontally of taper sheath.In the practice process, find; because UK is operated under complexity, the rugged environments such as high temperature, vibration, greasy dirt; make its roller type handle compressive deformation easily; the support spring fatigue deformation; connecting bolt is loosening; the wiring sealing-off causes the generation of phenomenons such as inefficacy of UK own and ground connection, short circuit, causes locomotive to add not upload, inertial defect such as control loop ground connection, diesel engine high capacity oil pressure protective circuit considered repealed.Because the fault of UK is frequent, some locomotive crew gets rid of UK again, thereby makes diesel engine thoroughly lose the protective function of oil pressure unloading, has buried a big hidden danger for locomotive quality and traffic safety.
The purpose of this utility model is to overcome the problem that above-mentioned mechanical type oil mass switch exists, and designs a kind of no matter how abominable environment is, can misoperation, and the electronic type oil mass switch of reliable performance.
The utility model is achieved in that it is made of electric part and shell.Electric part has signal sampling, signal relatively, electronic switch, power supply voltage stabilizing and protective circuit constitute, signal sampling be the input end of isolating transformer directly and tachometer generator join, the ac voltage signal of obtaining inserts bridge rectifier and eliminator, makes the ac voltage signal of obtaining become d. c. voltage signal stably; Signal comparator circuit, its center part is an integrated operational amplifier, the voltage signal that a corner connection of integrated amplifier is got, the voltage signal that a corner connection is compared with it, when institute's power taking presses signal to be lower than comparison signal, operational amplifier output high level; Electronic switching circuit is that the collector electrode of switching tube connects direct current electromagnetic relay coil and light emitting diode the base stage of the output terminal of operational amplifier by resistance access switching tube, and direct current electromagnetic relay normally closed interlock and high capacity voltage protection circuit join; Power supply voltage stabilizing and protective circuit its objective is for working power stably is provided to signal comparator circuit, to guarantee the amplifier operation precision, on external working power line, connect the anxious pressure of fus, piezoresistance and three ends integrated package, thereby played the voltage stabilizing of power supply and the protection of electronic component; During the input service power supply, by fus and light emitting diode, resistance makes light emitting diode shinny to negative pole to electric current from positive pole; During the electronic switching circuit action, the loop that electric current is formed by fus, resistance, light emitting diode, switching tube makes light emitting diode shinny, thereby indicates the working state of this device.Shell is a rectangular, makes with transparent hard plastic, and electric part is contained in the shell.
The utility model compared with prior art has; features simple structure, sample of signal is accurate, strong interference immunity; switching speed is fast; stable and reliable for performance, the debugging method science is easily gone, and installation and maintenance are very convenient; labor aptitude is preferably arranged; can omit the auxiliary reclay in the former protective circuit, be difficult for breaking down long service life.
Fig. 1, Fig. 2 are existing diesel engine high capacity oil pressure protective circuit figure
Fig. 3 is a present technique electronic type oil mass switching circuit
Fig. 4 is diesel engine high capacity oil pressure protective circuit figure
Be described further below in conjunction with accompanying drawing, 3,4 is the input end of isolating transformer B among Fig. 3, and it and tachometer generator CF join, as shown in Figure 4, and the output termination bridge rectifier D of isolating transformer B
3--D
6, meet π shape eliminator C after the rectification again
1, R
2, C
2, filtered steady voltage signal one termination integrated operational amplifier IC, the other end connecting resistance R
3, R
4, R
5, R
6The voltage given electric bridge of forming, another input termination voltage given electric bridge of integrated operational amplifier IC is at the indirect neutralizing capacitance C of two inputs of integrated operational amplifier IC
4, its output termination feedback resistance R
7, its output terminal is also by diode D
1And R
8Connect the base stage of switching tube BG, the collector electrode of switching tube BG and direct current electromagnetic relay coil J
1--1Join, then and meet diode D
2With by fus RD, up to power supply 2 points.After power positive end meets fus RD, insert three-terminal voltage-stabilizing integrated package wu and capacitor C again
3, piezoresistance UR and light emitting diode D
7, direct current electromagnetic relay normally closed interlock J
1-2Connect 1,6 points of high capacity oil hydraulic circuit protection, promptly be connected on the position of locomotive electric apparatus cabinet Central Plains auxiliary reclay 1ZJ, thereby replaced former mechanical type oil mass switch and 1ZJ, as shown in Figure 4, when diesel engine speed was low, the amplifier output low level had only D this moment
7Luminous, when diesel engine speed raises, rotating speed when 750 γ/min, amplifier output high level, electromagnetic relay coil J
1--1, get electric adhesive, normally closed interlock J
1--2Disconnect, the oil pressure unloading protective circuit is not opened circuit and enter guard mode, light emitting diode D simultaneously
8Luminous, thus realized that diesel engine can protect under the high capacity low oil pressure.
Claims (4)
1; electronic type oil mass switch; it is made of electric part and shell; shell is a rectangular; make with transparent hard plastic; electric part is cased; electric part has signal sampling; signal relatively; electronic switch; power supply voltage stabilizing and protective circuit constitute; it is characterized in that: signal sampling be the input end of isolating transformer B directly and tachometer generator CF join; steady d. c. voltage signal and integrated operational amplifier IC one input angle that the ac voltage signal of obtaining is obtained after by rectifying and wave-filtering joins then; another input angle and the voltage given electric bridge of operational amplifier IC join, and are connected to neutralizing capacitance C between two input angles
4, operational amplifier IC output termination feedback resistance R
7To the voltage given electric bridge with by diode D
1, resistance R
8Connect the base stage of switching tube BG, the collector connecting relay coil J of switching tube BG
1-1With electric apparatus coil and meet flashing diode D
8And resistance R
10Up to the 24V working power, with relay coil J
1-1Diode D in addition in parallel
2With flashing diode D
7, the emitter connecting to neutral of switching tube BG, 1,6 of the normally closed interlocks of direct current electromagnetic relay connect high capacity oil pressure protective circuit.
2, electronic type oil mass switch according to claim 1 is characterized in that: this switch be installed in locomotive electric apparatus cabinet Central Plains auxiliary reclay 1ZJ the position, and replaced former mechanical type oil mass switch and 1ZJ.
3, electronic type oil mass switch according to claim 1 and 2 is characterized in that: connect three-terminal voltage-stabilizing integrated package wu and capacitor C in parallel with it on the 24V direct current supply line
3, piezoresistance UR is attempted by on the three-terminal voltage-stabilizing integrated package.
4, according to claim 1 or 3 described electronic type oil mass switches, it is characterized in that: the collector electrode at switching tube directly is connected to flashing diode D
8Pass through resistance R again
10Arrive power supply 2 with fus, on power line, meet flashing diode D
7And resistance R
9Up to zero point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95212605 CN2240047Y (en) | 1995-05-23 | 1995-05-23 | Electronic oil quantity switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95212605 CN2240047Y (en) | 1995-05-23 | 1995-05-23 | Electronic oil quantity switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2240047Y true CN2240047Y (en) | 1996-11-13 |
Family
ID=33862735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95212605 Expired - Fee Related CN2240047Y (en) | 1995-05-23 | 1995-05-23 | Electronic oil quantity switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2240047Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107364236A (en) * | 2016-03-30 | 2017-11-21 | 株式会社捷太格特 | The control method of control device and fluid supply apparatus |
-
1995
- 1995-05-23 CN CN 95212605 patent/CN2240047Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107364236A (en) * | 2016-03-30 | 2017-11-21 | 株式会社捷太格特 | The control method of control device and fluid supply apparatus |
| CN107364236B (en) * | 2016-03-30 | 2021-03-16 | 株式会社捷太格特 | Control device and control method for fluid supply device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |