CN205330814U - Stepless free speed governing diesel engine - Google Patents
Stepless free speed governing diesel engine Download PDFInfo
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- CN205330814U CN205330814U CN201521064545.5U CN201521064545U CN205330814U CN 205330814 U CN205330814 U CN 205330814U CN 201521064545 U CN201521064545 U CN 201521064545U CN 205330814 U CN205330814 U CN 205330814U
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Abstract
The utility model relates to a stepless free speed governing diesel engine, including diesel engine, control system, control system includes speed sensor, programmable controller, electronic governor and throttle executor, the throttle executor is diesel engine's mechanical governor ji xietiaoxie, and its speed governing handle is located rated revolution position and rigid, and its oil -break solenoid valve is the proportion expression solenoid valve, and electronic governor was located the zero -bit just when its shutdown handle was located the parking position. The utility model discloses a permanent rotational speed control strategy of three closed loops and electron throttle actuating mechanism, realized that mode is stabilized to three kinds of operating modes of permanent rotational speed, constant pressure and constant current volume of diesel engine, widened diesel engine's working range and operating condition.
Description
Technical field
This utility model relates to a kind of stepless free regulating speed diesel oil electromotor。
Background technology
Centrifugal pump, being the most popular a kind of machineries of the mankind, has in various aspects such as Aero-Space, military combat, navigation engineering, petrochemical industry and plumbing and is widely applied very much。Centrifugal pump is generally provided power by Diesel engine。Centrifugal pump utilizes impeller to rotate and make water generation centrifugal motion carry out work, its operation principle is: after liquid enters housing by impeller, owing to the runner of volute housing expands gradually, the flow velocity of liquid is little along with dropping gradually, and part kinetic energy is converted into static energy, and then liquid discharges housing with higher pressure, meanwhile impeller central forms vacuum owing to liquid throws away, and the pressure at liquid level place is higher than import, then liquid under atmospheric pressure successively enters impeller, more constantly discharges。
Ordinary Centrifugal Pumps, if sucking liquid level under impeller, should pour water during startup in advance, very inconvenient。Meanwhile, in order to live liquid at pump internal memory, suction tube import needs to install in advance bottom valve, and pump operationally bottom valve causes very big hydraulic loss。
In the situation of plateau, atmospheric pressure reduces, but the inlet pressure of centrifugal pump reduces the cavitation phenomenons being easily caused pump and occurs, and pump is caused damage。So tableland circumstance is very harsh to the service requirement of centrifugal pump, centrifugal pump not cavitation can be realized on plateau and be to ensure that centrifugal pump can the key run steady in a long-term。
Rotating speed is the core work parameter of centrifugal pump。When pump runs under each operating mode, Diesel engine all can have a rotating speed matched, as long as rotating speed is determined, other running parameters of centrifugal pump it is determined that, the work that such centrifugal pump can be more efficient。But when outer load changes, the output moment of torsion of Diesel engine can change, rotating speed also correspondingly changes, can cause Diesel engine that the situation that stall, vexed car and oil consumption increase occurs, and the rotating speed of Diesel engine directly decide centrifugal pump can at the rotating speed point normal operation required。Therefore, the stability keeping rotary speed of diesel engine is very important。When operating mode changes, when needing change system working parameters, it is accomplished by changing its working speed, but the rotating speed of ordinary diesel oil electromotor sets before dispatching from the factory, rely on and regulate accelerator open degree adjustment rotary speed of diesel engine, there are three rated engine speeds, start idling, nominal operation rotating speed, maximum speed, its rotation speed change is saltatory, intermediateness is unstable, the impact of equipment is bigger, but this adjustment process is unstable and cannot regulate rotation speed change accurately, other rotating speeds uncontrollable except these three working speed, stepless speed regulation can not be realized, thus the multi-state in order to ensure centrifugal pump runs, it is necessary for the design stepless free speed adjusting module of Diesel engine, this is also the difficult point and the key point that need to capture。
Referring to Fig. 2, the original speed control principle of Diesel engine is to regulate the size of governor spring restoring force according to speed adjusting lever position difference and have the principle that different flyball centrifugal force reaches balance with it to realize controlling rotating speed；When speed adjusting lever adds general orientation rotation toward governor spring pretightning force, tooth bar moves toward big oil mass direction, oil mass increases, rotating speed rises, and the centrifugal force of flyball increases therewith, when centrifugal force and governor spring tension balanced, rotary speed of diesel engine is stable at rotating speed of target, when governor spring pretightning force diminishes, rotary speed of diesel engine declines can near rotating speed of target, centrifugal force and governor spring tension balanced；Thus reaching the purpose of speed governing。
Fuel shut-off solenoid has two positions, adhesive and free state, when energized, electromagnetic actuation, electric magnet guide rod departs from shutdown handle, do not affect the work of speed regulator, when power is off, stretch out under electric magnet guide rod spring-force driven dual therein, act on shutdown handle, shifting shutdown handle onto parking spot, can make oil pump oil-break, Diesel engine shuts down。
Therefore, the original adjustment process of Diesel engine is unstable and cannot regulate rotation speed change accurately, it is impossible to realize stepless speed regulation。
Utility model content
This utility model purpose is to provide a kind of stepless free regulating speed diesel oil electromotor, and the centrifugal pump that can meet use joined together realizes the requirement of permanent rotating speed, constant pressure, three kinds of mode of operations of constant flow。
Technical solution of the present utility model is:
A kind of stepless free regulating speed diesel oil electromotor, including Diesel engine, control system；Described Diesel engine includes oil pump；It is characterized in that, described control system includes speed probe, Programmable Logic Controller, electron speed regulator and throttle actuator；Described throttle actuator is the mechanical governor of Diesel engine, and, the speed adjusting lever of described mechanical governor is positioned at rated speed position and maintains static, the Fuel Cut Solenoid Valve of described mechanical governor is proportional solenoid valve, the shutdown handle of described mechanical governor when being positioned at parking spot described electron speed regulator be located exactly at zero-bit；Described speed probe gathers tach signal from Diesel engine and sends into Programmable Logic Controller；Described Programmable Logic Controller regulates signal according to tach signal output speed；Rotary speed regulating signal is converted to the current signal proportional to rotary speed regulating signal and sends into the proportional solenoid valve of throttle actuator by described electron speed regulator。
Above-mentioned control system also includes inlet pressure transmitter, outlet pressure transmitter, 1# filtering outlet pressure transmitter, 2# filtering outlet pressure transmitter, 1# effusion meter and 2# effusion meter；Described inlet pressure transmitter and outlet pressure transmitter are separately mounted to water inlet and the water outlet of centrifugal pump；Described 1# filtering outlet pressure transmitter, 1# effusion meter, 2# filtering outlet pressure transmitter and 2# effusion meter are separately mounted to the 1# filter of diesel engine and the exit of 2# filter；Pressure signal and the flow signal of described inlet pressure transmitter, outlet pressure transmitter, 1# filtering outlet pressure transmitter, 2# filtering outlet pressure transmitter, 1# effusion meter and the output of 2# effusion meter are respectively fed to Programmable Logic Controller。
Above-mentioned Programmable Logic Controller can regulate signal according to tach signal by pid control algorithm output speed；
Above-mentioned Programmable Logic Controller also can regulate signal, pressure adjustment signal and flow regulating signal according to tach signal, pressure signal and flow signal by pid control algorithm output speed respectively；
Described pid control algorithm expression formula is:
In formula: MV is output valve；KPIt it is proportional gain；E (t) is deviation value；PV is measured value；SV is desired value；KDIt it is the differential gain；PV (t) S is the differential value of PV (t)；KIIt it is storage gain；It it is the integrated value of E (t)。
Advantage of the present utility model:
1, the stepless free regulating speed diesel oil electromotor of this utility model, can drive centrifugal pump, is used for carrying water or wet goods medium, not by the restriction such as electric power, tableland circumstance, it is possible to be widely used in military combat, outdoor sports etc., substantially increase outdoorsman mobility。
2, the stepless free regulating speed diesel oil electromotor of this utility model have employed E-Gas driving mechanism, owing to driving mechanism is by signal of telecommunication control, control signal can be inputted by manual knob or touch screen speed setting two ways, the control signal of input makes driving mechanism move, Diesel engine throttle aperture is changed, rotary speed of diesel engine is controlled thereby through controlling diesel engine fuel-firing conveying fuel-flow control, can between idling and maximum speed step-less adjustment, it may be achieved constant pressure oil supply。In order to enable Diesel engine in any rotating speed stable operation, it is internal ring control that the present invention controls the electron speed regulator of system, and internal ring controls to be divided into again current regulator and rotating speed control loop, to rotating speed coarse adjustment, can make stabilization of speed within the scope of one；Vehicle Controller is outer shroud control, to rotating speed fine tuning, can make stabilization of speed in setting value。Therefore, under each operating mode, no matter how load changes, the invariablenes turning speed of Diesel engine can be ensured, can make Diesel engine stable operation on any one rotating speed point of 1100～3600 revs/min, thus achieve the rotating speed of Diesel engine accurately, stable, continuous print function of stepless speed regulation, solve the change of rotary speed of diesel engine saltatory, intermediateness unstable, equipment is impacted bigger problem。This system it is achieved that
3, owing to a nominal operation rotating speed of centrifugal pump is to should one group of rated operating pressure of pump group and flow。The present invention is on the basis of electronic stepless speed regulation, have employed three closed loop constant speed control schemes, it is made up of speed probe, Programmable Logic Controller, electron speed regulator, throttle actuator etc., the feedback signal of rotating speed and pressure transducer and flow transducer is regulated by continuous print accurately, achieve the permanent rotating speed of pump group, constant pressure and three kinds of stable conditions mode of operations of constant flow, widen working range and the duty of pump group。
4, the centrifugal pump joined together by this utility model Diesel engine adopts self-absorption centrifugal pump configuration, and housing design has the water inlet bend pipe of S type, and design simultaneously has fluid reservoir。Thus can store a part of medium after this has carried medium in pump, without pouring in down a chimney when making start next time, without bottom valve, more quickly suct medium, liquid normal operation just can be sucted through the operating of short time pump, realize the self-priming requirement of pump group, increase outdoorsman convenience。Housing is also devised with gas-liquid separation chamber and fluid return ports, after pump startup, turning effort due to impeller, air and the liquid of suction line are sufficiently mixed, and are discharged to gas-liquid separation chamber, and the gas on gas-liquid separation chamber top is discharged, the liquid of bottom comes back to impeller by return port, mix with the gas of suction line, until the gas in suction line and pump has been completely exhausted out self-priming, normal operation。
5, this utility model can monitor Diesel engine work (such as engine oil pressure, oil temperature, Diesel engine working speed, supply reservoir oil level, pump group inlet pressure, pump group working flow) and system work (as fluid reservoir medium reserves, filter duty, medium make consumption etc.) performance parameters。To fault alarm and protections such as Diesel engine hypervelocity, driving, machine oil shortcoming, too high, excessively high/low, the plugged filter of tank level of oil temperature in system; and all kinds of control parameters, alarm signal are exported by bus, in order to central control room teletransmission centralized Control。
Accompanying drawing explanation
Fig. 1 is this utility model Diesel engine and the structural representation of corresponding centrifugal pump；
Fig. 2 is existing Diesel engine machinery formula throttle control system structural representation；
Fig. 3 is the stepless free speed governing type throttle control system structural representation of this utility model Diesel engine；
Fig. 4 is the stepless electronic governing system theory diagram of this utility model Diesel engine；
Fig. 5 is the revolution speed control system principle of this utility model Diesel engine；
Fig. 6 is the control system flow chart of this utility model Diesel engine。
Wherein: 1-self-priming centrifugal pump, 100-water inlet, 101-housing, 102-inducer, 103-locking nut, 104-impeller, 105-mechanical seal, 106-main shaft, 107-bracket, 108-S type water inlet bend, 109-fluid return ports, 110-fluid reservoir, 111-outlet, 112-gas-liquid separation chamber, 2-Diesel engine, 20-mechanical governor, 22-oil pump, 201-speed adjusting lever, 202-oil-break electric magnet, 203-flyball, 204-sliding sleeve, 205-shutdown handle, 206-governor spring, 207-boosting-rod, 208-parking spot, 209-tooth bar, 4-unsplit bedplate；
Detailed description of the invention
Referring to Fig. 1, the housing 101 of this utility model Diesel engine centrifugal pump used joined together is built with inducer 102, impeller 104, mechanical seal 105；Fluid passes sequentially through inducer 102, impeller 104 by the water inlet 100 of housing 101 after being entered, then is flowed out by the outlet 111 of housing；Inducer 102 and impeller 104 pass through key transmission with main shaft；One end of main shaft 106 is power intake, is held tightly on diesel engine machine crankshaft by extending shaft structure attachment screw；The main shaft other end is fixed be connected with inducer 102, impeller 104, mechanical seal 105 successively, and inducer is positioned at the front end of impeller。The end of the main shaft other end is provided with spindle nose locking nut 103, and spindle nose locking nut is for carrying out axial restraint to inducer and impeller。During installation, impeller location is in the outlet passage of housing, and its effect is to have pressure to go out by housing runner in the medium through impeller effect；Inducer position intakes in bend pipe in housing S type, it is possible to allow medium before by impeller effect just through the effect of inducer, raising anti-cavitation performance。Consider that medium is revealed, after main shaft is positioned at impeller, mechanical seal is installed。It is fixed together with bracket between housing and Diesel engine, it is ensured that the run stability of unit。Unit has the unsplit bedplate 4 being easy to movement, self-priming centrifugal pump and Diesel engine integral installation on base。
As it is shown on figure 3, the shutdown handle 205 of mechanical governor 20 is pulled parking spot 208, it is connected with the zero-bit of electron speed regulator in this position。Speed adjusting lever 201 should pull rated speed position, and is fixed up。After connection, it is ensured that connecting rod motion is flexibly, fixing reliable。Original Fuel Cut Solenoid Valve is replaced again with proportion electro-magnet。The function of proportion electro-magnet is the signal of telecommunication converting to force or displacement that Proportional Amplifer are exported。Proportion electro-magnet thrust is big, and simple in construction, oil cleanliness is less demanding, and easy to maintenance, cost is low, and armature chamber can make high pressure resistant structure, is wide variety of electromechanical converter part in electrical-liquid control element。
Control system 3 includes Programmable Logic Controller, touch screen, Diesel engine electron speed regulator, throttle actuator, may also include inlet pressure transmitter, outlet pressure transmitter, 1# filtering outlet pressure transmitter, 2# filtering outlet pressure transmitter, ambient temperature transmitter, tank gauge, oil temperature oil pressure transmitter, 1# effusion meter, 2# effusion meter, 1# speed probe, 2# speed probe and oil tank level meter if desired。The control system 3 being made up of storage battery, Diesel engine, executor, electron speed regulator, Programmable Logic Controller, touch screen, pump group, various sensor and control circuit shown in Fig. 4。
Programmable Logic Controller, touch screen and Diesel engine electron speed regulator are arranged in control system。Throttle actuator, oil temperature oil pressure transmitter, ambient temperature transmitter, 1# speed probe and 2# speed probe are arranged on Diesel engine。
Inlet pressure transmitter and outlet pressure transmitter are separately mounted to water inlet and the water outlet of centrifugal pump；1# filtering outlet pressure transmitter, 1# effusion meter, 2# filtering outlet pressure transmitter and 2# effusion meter are separately mounted to the 1# filter of diesel engine and the exit of 2# filter；The output signal of inlet pressure transmitter, outlet pressure transmitter, 1# filtering outlet pressure transmitter, 2# filtering outlet pressure transmitter, 1# effusion meter and 2# effusion meter sends into Programmable Logic Controller。
Tank gauge is arranged on the fuel tank of Diesel engine。Oil tank level meter is arranged on oil tank。
The major function of throttle actuator is to convert the position signalling that rotational speed governor exports to specify straight-line displacement position to control fuel supply volume。The input of throttle actuator is the signal of telecommunication, and output is machinery rectilinear motion。Machinery rectilinear motion be entered as proportionate relationship。Throttle actuator has the features such as control performance is excellent, volume is little, reliability is high and installs, good seal performance with oil pump integral type, can improve the speed governing index of Diesel engine and realize Automated condtrol and the protection of Diesel engine。Throttle actuator tip designs has manual regulating device, is in particular cases capable of the function of manual adjustments fuel delivery。
Utility model works principle:
Rotary speed of diesel engine controls system principle as shown in Figure 5, speed probe gathers tach signal from Diesel engine, square-wave signal is converted to through corresponding change-over circuit, rotating speed PV is calculated by measuring umber of pulse, send into Programmable Logic Controller, when measured value PV and target set point SV is unequal, produce deviation signal E (t)=SV-PV, deviation signal is carried out computing by pid control algorithm preset in this controller, and export corresponding adjustment signal MV, regulate the current signal that signal drives throttle actuator output proportional to regulating signal through electron speed regulator, regulate the rotating speed of Diesel engine, deviation is made to level off to zero, Diesel engine is allowed to keep constant-speed operation。
When external load increases suddenly, system controls throttle actuator and increases aperture, to avoid diesel oil rotating speed to reduce suddenly even flame-out phenomenon；When external load reduces suddenly, system controls throttle actuator and reduces aperture, to avoid rotary speed of diesel engine to raise suddenly the phenomenon of even driving。
Pid control algorithm basic representation is:
In formula: MV is output valve；KPIt it is proportional gain；E (t) is deviation value；PV is measured value；SV is desired value；KDIt it is the differential gain；PV (t) S is the differential value of PV (t)；KIIt it is storage gain；It it is the integrated value of E (t)。
Due to a nominal operation rotating speed of centrifugal pump, to should one group of rated operating pressure of centrifugal pump and flow。This utility model is again on the basis of this control program, feedback signal by pressure transducer (inlet pressure transmitter, outlet pressure transmitter, 1# filtering outlet pressure transmitter, 2# filtering outlet pressure transmitter) and flow transducer (1# effusion meter and 2# effusion meter), it is achieved that Isobarically Control and constant flux control。The flow chart of this control system is as shown in Figure 6。
Claims (4)
1. a stepless free regulating speed diesel oil electromotor, including Diesel engine (2), controls system (3)；Described Diesel engine includes oil pump (22)；It is characterized in that: described control system (3) includes speed probe, Programmable Logic Controller, electron speed regulator and throttle actuator；Described throttle actuator is the mechanical governor (20) of Diesel engine, and, the speed adjusting lever (201) of described mechanical governor (20) is positioned at rated speed position and maintains static, the Fuel Cut Solenoid Valve (202) of described mechanical governor (20) is proportional solenoid valve, and when the shutdown handle (205) of described mechanical governor (20) is positioned at parking spot (208), described electron speed regulator is located exactly at zero-bit；Described speed probe gathers tach signal from Diesel engine and sends into Programmable Logic Controller；Described Programmable Logic Controller regulates signal according to tach signal output speed；Rotary speed regulating signal is converted to the current signal proportional to rotary speed regulating signal and sends into the proportional solenoid valve of throttle actuator by described electron speed regulator。
2. stepless free regulating speed diesel oil electromotor according to claim 1, it is characterised in that: described Programmable Logic Controller is to regulate signal according to tach signal by pid control algorithm output speed；Described pid control algorithm expression formula is:
In formula:
MV is output valve；
KPIt it is proportional gain；
E (t) is deviation value；
PV is measured value；
SV is desired value；
KDIt it is the differential gain；
PV (t) S is the differential value of PV (t)；
KIIt it is storage gain；
It it is the integrated value of E (t)。
3. stepless free regulating speed diesel oil electromotor according to claim 1, it is characterised in that:
Described control system (3) also includes inlet pressure transmitter, outlet pressure transmitter, 1# filtering outlet pressure transmitter, 2# filtering outlet pressure transmitter, 1# effusion meter and 2# effusion meter；
Described inlet pressure transmitter and outlet pressure transmitter are separately mounted to water inlet and the water outlet of centrifugal pump；Described 1# filtering outlet pressure transmitter, 1# effusion meter, 2# filtering outlet pressure transmitter and 2# effusion meter are separately mounted to the 1# filter of diesel engine and the exit of 2# filter；
Pressure signal and the flow signal of described inlet pressure transmitter, outlet pressure transmitter, 1# filtering outlet pressure transmitter, 2# filtering outlet pressure transmitter, 1# effusion meter and the output of 2# effusion meter are respectively fed to Programmable Logic Controller。
4. stepless free regulating speed diesel oil electromotor according to claim 3, it is characterised in that:
Described Programmable Logic Controller is to regulate signal, pressure adjustment signal and flow regulating signal according to tach signal, pressure signal and flow signal by pid control algorithm output speed respectively；
Described pid control algorithm expression formula is:
In formula:
MV is output valve；
KPIt it is proportional gain；
E (t) is deviation value；
PV is measured value；
SV is desired value；
KDIt it is the differential gain；
PV (t) S is the differential value of PV (t)；
KIIt it is storage gain；
It it is the integrated value of E (t)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521064545.5U CN205330814U (en) | 2015-12-18 | 2015-12-18 | Stepless free speed governing diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521064545.5U CN205330814U (en) | 2015-12-18 | 2015-12-18 | Stepless free speed governing diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205330814U true CN205330814U (en) | 2016-06-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521064545.5U Withdrawn - After Issue CN205330814U (en) | 2015-12-18 | 2015-12-18 | Stepless free speed governing diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205330814U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443252A (en) * | 2015-12-18 | 2016-03-30 | 陕西航天动力高科技股份有限公司 | Stepless free-speed-regulating diesel engine |
| CN108049979A (en) * | 2017-11-17 | 2018-05-18 | 广州柴油机厂股份有限公司 | It is a kind of can stepless voltage regulation air pressure diesel engine side manipulate valuator |
-
2015
- 2015-12-18 CN CN201521064545.5U patent/CN205330814U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443252A (en) * | 2015-12-18 | 2016-03-30 | 陕西航天动力高科技股份有限公司 | Stepless free-speed-regulating diesel engine |
| CN105443252B (en) * | 2015-12-18 | 2018-06-19 | 陕西航天动力高科技股份有限公司 | A kind of stepless free regulating speed diesel oil engine |
| CN108049979A (en) * | 2017-11-17 | 2018-05-18 | 广州柴油机厂股份有限公司 | It is a kind of can stepless voltage regulation air pressure diesel engine side manipulate valuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160622 Effective date of abandoning: 20180619 |