CN204402643U - Two-stage turbocharging system and hoist - Google Patents
Two-stage turbocharging system and hoist Download PDFInfo
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- CN204402643U CN204402643U CN201420831798.XU CN201420831798U CN204402643U CN 204402643 U CN204402643 U CN 204402643U CN 201420831798 U CN201420831798 U CN 201420831798U CN 204402643 U CN204402643 U CN 204402643U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The utility model relates to a kind of two-stage turbocharging system and hoist, wherein, two-stage turbocharging system comprises: high pressure turbocharger, low pressure turbocharger and the bypass air intake passage be connected in parallel with low pressure turbocharger, low pressure turbocharger has the forthright air intake passage connecting air intlet, high pressure turbocharger is connected with air intlet by being connected in series low pressure turbocharger, and high pressure turbocharger also directly connects air intlet by bypass air intake passage.This two-stage turbocharging system is by arranging bypass air intake passage in parallel at the forthright air intake passage of low pressure turbocharger, achieve air-flow walks around low pressure turbocharger function when low engine speeds and low-load, reduce the hesitation of turbosupercharger to the full extent, improve the reaction velocity of motor, improve the cornering ability of hoist.
Description
Technical field
The utility model relates to engineering machinery field, particularly relates to a kind of two-stage turbocharging system and hoist.
Background technique
In engineering machinery field, hoist is a kind of conventional hoisting engineering machinery, wherein, truck crane is most popular hoist, its motor used is four stroke engine, the closed process that each work cycle of motor is made up of air inlet, compression, acting and exhaust four job steps, these processes of the carrying out that motor only goes round and begins again could continuous firing.In order to increase the air inflow of motor, improving engine combustion efficiency and dynamic property, usually needing to arrange pressurization system, pressurization system passes through engine exhaust energy by air of low density therein boil down to high-density air.
As shown in Figure 1, for the structural representation of existing truck crane turbo charge system, in engine suction stroke, first ambient air enters turbosupercharger a1 by suction tude a2, through turbosupercharger a1 pressurization after become high temperature and high pressure gas, high temperature and high pressure gas by cold suction tude a3 enter intercooler a4, in intercooler a4 cooling after, in passing through, cold steam outlet pipe a5 enters motor a6, for engine combustion again.In engine exhaust process, first the waste gas of discharging in motor a6 cylinder body enter turbosupercharger a1, promotes turbosupercharger a1 and rotate and to after air inlet pressurization, enter air by outlet pipe a7.
As shown in Figure 2, be the internal structure schematic diagram of turbosupercharger a1, turbosupercharger a1 comprises: compressor casing a11, compressor impeller a12, bearing support a13, turbine box a14, turbine a15.Turbine a15 is acting parts, promote turbine shaft by turbine a15 after waste gas enters from exhaust gas intake port B rotate and discharge from exhaust outlet C, turbine shaft and compressorshaft are rigidly connected, and then drive the compressor impeller a12 of gas compressor to rotate, and to the air acting entered from air intlet A, ambient air is become high temperature and high pressure gas.Turbo charge system is mainly divided into single stage turbocharger system and tandem two-stage turbocharging system.
As shown in Figure 3, for the structural representation of single stage turbocharger system, single stage turbocharger system major character only has a turbosupercharger b2, and air enters turbosupercharger b2 by first compression from air intlet A, is admitted to motor b1 after then being cooled by intercooler b3.The advantage of single stage turbocharger system is that structure is simple; Shortcoming is that gas only carries out a supercharging, low pressure, and a turbosupercharger needs to take into account at a high speed and low-speed performance simultaneously, and turbosupercharger rotary inertia is large, and turbo lag phenomenon is more serious.
As shown in Figure 4, for the structural representation of tandem two-stage turbocharging system, tandem two-stage turbocharging system is composed in series by high pinch roller pressurized machine c2 and low-pressure filter pressurized machine c4 two turbosupercharger, air enters low-pressure filter pressurized machine c4 and high pinch roller pressurized machine c2 by secondary compression successively from air intlet A, is admitted to motor c1 after then being cooled by intercooler c3.Tandem two-stage turbocharging system can realize the secondary booster of air, and its advantage is that boost pressure is high, air inflow foot, and turbo lag effect is little, high engine speeds and low-speed performance excellence; Shortcoming is complex structure.
Existing tandem two-stage turbocharging system has made improvement to above-mentioned two-stage turbocharging system, as shown in Figure 5, existing tandem two-stage turbocharging system comprises high pressure turbocharger d2, intercooler d3, low pressure turbocharger d4, electronically controlled proportional valve d5, electronically controlled proportional valve d5 is in parallel with high pressure turbocharger d2.When motor d1 rotating speed is lower or exhaust pressure is lower, electronically controlled proportional valve d5 is in closed condition substantially, and now low-pressure air enters motor d1 mainly through low pressure turbocharger d4 and high pressure turbocharger d2; When motor d1 rotating speed is higher or exhaust pressure is higher, electronically controlled proportional valve d5 is in open mode substantially, now low-pressure air enters motor mainly through low pressure turbocharger d4 and electronically controlled proportional valve d5, part low-pressure air also can enter motor by low pressure turbocharger d4 and high pressure turbocharger d2 simultaneously, and the aperture of electronically controlled proportional valve controls by motor d1 rotating speed or exhaust pressure.In engine working process, waste gas enters air through high pressure turbocharger d2 and low pressure turbocharger d4 all successively.
Existing tandem twin-turbo system, no matter motor d1 is in any working state, and low-pressure air has to pass through low pressure turbocharger d4 just can enter motor d1.When motor d1 rotating speed is lower or exhaust pressure is lower, the supercharging work of low-pressure air is mainly realized by high pressure turbocharger d2, now low pressure turbocharger d4 only plays the effect of gas-entered passageway, because high pressure turbocharger d2 rotary inertia is little, be quick on the draw, so tandem twin-turbo system is little relative to single turbine pressurization system turbo lag effect, voltage built-up rate is fast, can improve performance when low engine speeds and low-load.But, due to when motor d1 rotating speed is lower or exhaust pressure is lower, low-pressure air has to pass through low pressure turbocharger d4 just can enter high pressure turbocharger d2, intake resistance is large, limit the ability that tandem twin-turbo system reduces turbo lag effect further, cannot eliminate turbo lag effect to the full extent, the reaction velocity of motor is lowered then, and the cornering ability of hoist is not improved.In addition, electronically controlled proportional valve d5 opening degree only controls by engine speed or exhaust pressure, and control strategy is simple, and vehicle load cannot be made to feed back to completely on engine aspirating system.
Model utility content
For overcoming above technological deficiency, the technical problem that the utility model solves is to provide a kind of two-stage turbocharging system, this two-stage turbocharging system effectively can reduce the hysteresis phenomenon of turbo charge system, improves motor reaction velocity, improves the cornering ability of hoist.
For solving the problems of the technologies described above, the utility model provides a kind of two-stage turbocharging system, there is air intlet and exhaust outlet, two-stage turbocharging system comprises: high pressure turbocharger, low pressure turbocharger and the bypass air intake passage be connected in parallel with low pressure turbocharger, low pressure turbocharger has the forthright air intake passage connecting air intlet, high pressure turbocharger is connected with air intlet by being connected in series low pressure turbocharger, and high pressure turbocharger also directly connects air intlet by bypass air intake passage.
In the technological scheme that this is basic, by increasing bypass air intake passage, and adopt the structural type that bypass air intake passage and low pressure turbocharger are connected in parallel, achieve air-flow walks around low pressure turbocharger function when low engine speeds and low-load, reduce the hesitation of turbosupercharger to the full extent, improve the reaction velocity of motor, improve the cornering ability of hoist.
Further, two-stage turbocharging system also comprises the electronically controlled proportional valve be connected in parallel with high pressure turbocharger, and electronically controlled proportional valve can cross the flow of high pressure turbocharger and electronically controlled proportional valve by control flow check in proportion.
In the technological scheme of this improvement, electronically controlled proportional valve crosses by control flow check the working state that high pressure turbocharger coordinates motor different with the flow of electronically controlled proportional valve, optimize the working efficiency of motor, make two-stage turbocharging system possess single turbine supercharging and twin turbocharged two kinds of mode of operations.When engine speed is lower or exhaust pressure is lower, electronically controlled proportional valve makes low-pressure air enter motor mainly through low pressure turbocharger and high pressure turbocharger; When engine speed is higher or exhaust pressure is higher, electronically controlled proportional valve makes low-pressure air enter motor mainly through low pressure turbocharger and electronically controlled proportional valve.
Further, two-stage turbocharging system also comprises the channel valve assembly be arranged on forthright air intake passage and bypass air intake passage, and channel valve assembly can control the on off operating mode of forthright air intake passage and bypass air intake passage.
In the technological scheme of this improvement, valve member can control the air mass flow flowing through forthright air intake passage and bypass air intake passage under motor different rotating speeds, effectively improves working efficiency and the applicability of pressurization system.
Preferably, channel valve assembly is butterfly valve assembly.
In this preferred technological scheme, channel valve assembly is selected conventional butterfly valve to save manufacture cost and is had higher reliability.
Further, butterfly valve assembly comprises valve rod, the first valve disc and the second valve disc, first valve disc and the second valve disc are fixedly installed on valve rod, and by rotation valve rod, the first valve disc and the second valve disc change the on off operating mode of forthright air intake passage and bypass air intake passage respectively.
In this preferred technological scheme, butterfly valve assembly is primarily of two valve discs and valve rod composition, and structure is simple, easy to process and effectively can ensure the on-off function of valve member, has higher reliability.
Further, the first valve disc and the second valve disc orthogonal.
In the technological scheme of this improvement, mutually perpendicular two valve discs can make forthright air intake passage contrary to the on off operating mode of bypass air intake passage to adapt to the supercharging needs of motor under different rotating speeds.
Preferably, channel valve assembly is electromagnetism on-off valve assembly.
In this preferred technological scheme, the electromagnetism on-off valve that channel valve assembly selecting circuit controls, controls sensitive, efficient and convenient and has higher reliability and break-make stability.
Further, two-stage turbocharging system also comprises the downstream and the compensation conduit of connection forthright air intake passage and bypass air intake passage that are arranged on channel valve assembly.
In the technological scheme of this improvement, the impact that compensation conduit can reduce when airflow direction switches low pressure turbocharger is set at forthright air intake passage and bypass air intake passage, ensure that the working stability of low pressure turbocharger.
Further, the caliber of compensation conduit is all less than the caliber of forthright air intake passage and bypass air intake passage.
In the technological scheme of this improvement, only the manufacture caliber of compensation conduit need be limited in the scope of the caliber being less than forthright air intake passage and bypass air intake passage, select simple structure can achieve air-flow and compensate, and easy to process, save manufacture cost.
Further, two-stage turbocharging system also comprises control unit, and control unit can control electronically controlled proportional valve and channel valve assembly according to engine speed S and engine load P.
In the technological scheme of this improvement, control unit is demarcated motor, according to nominal data, control unit control electronically controlled proportional valve and channel valve assembly are to the on off operating mode of passage, vehicle load is fed back on engine aspirating system completely, and optimize control strategy, automaticity is high.
Further, control unit comprises controller, solenoid valve and performs cylinder, controller controls electronically controlled proportional valve and solenoid valve respectively by engine speed and engine load and preset calibrations parameter are carried out contrast, solenoid valve carrys out the opening state of control channel valve member by the break-make controlling to perform air cylinder air source, improves the being quick on the draw property of two-stage turbocharging system.
In the technological scheme of this improvement, calibrating parameters is passed to controller by motor, the data transformations received becomes different electric currents to export by controller, and electronically controlled proportional valve accepts the electric current that controller sends, and realizes the control to the air mass flow by high pressure turbocharger and electronically controlled proportional valve; Solenoid valve accepts the electric current that controller sends, control the break-make performing air cylinder air source, thus the aperture of control channel valve member is to realize the control to forthright air intake passage and bypass air intake passage on off operating mode, this control logic achieves the selection of gas-entered passageway and the control of air circulation, has higher practicability.
The utility model additionally provides a kind of hoist, and this hoist has above-mentioned two-stage turbocharging system.
In the technological scheme that this is basic, this two-stage turbocharging system is applicable to hoist, effectively can improve the driving comfortability of hoist.
Preferably, this hoist is truck crane.
In this preferred technological scheme, this two-stage turbocharging system is particularly useful for the truck crane mainly operating in middle low speed.
Thus, based on technique scheme, the utility model provides a kind of two-stage turbocharging system, this two-stage turbocharging system is by arranging bypass air intake passage in parallel at the forthright air intake passage of low pressure turbocharger, achieve air-flow walks around low pressure turbocharger function when low engine speeds and low-load, reduce the hesitation of turbosupercharger to the full extent, improve the reaction velocity of motor, improve the cornering ability of hoist.Further, control unit is set and makes vehicle load to feed back on engine aspirating system completely, optimize control strategy, there is higher practicability and reliability and stability.The hoist that the utility model provides correspondingly also has above-mentioned beneficial effect.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, only for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structure diagram that turbo charge system installs on the engine;
Fig. 2 is the internal structure sketch of turbosupercharger;
Fig. 3 is the structural representation of single stage turbocharger system;
Fig. 4 is the structural representation of two-stage turbocharging system;
Fig. 5 is the structural representation of existing two-stage turbocharging system;
Fig. 6 is the structural representation of an embodiment of the utility model two-stage turbocharging system;
Fig. 7 is the structural representation of another embodiment of the utility model two-stage turbocharging system;
Fig. 8 is the structural representation of butterfly valve Assemblies Example in the utility model two-stage turbocharging system;
Fig. 9 is the structural representation of another embodiment of the utility model two-stage turbocharging system;
Figure 10 is the structural representation of control unit embodiment in the utility model two-stage turbocharging system.
Embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Embodiment of the present utility model is for the ease of having further description to design of the present utility model, the technical problem solved, the technical characteristics forming technological scheme and the technique effect that brings.It should be noted that, the explanation for these mode of executions is not formed restriction of the present utility model.In addition, just can mutually combine as long as the technical characteristics related in mode of execution of the present utility model described below does not form conflict each other.
Because existing two-stage turbocharging system cannot eliminate the hesitation of turbine to the full extent, the reaction velocity of motor can not ensure, the cornering ability of hoist is not improved, the utility model devises a kind of two-stage turbocharging system, this two-stage turbocharging system is by arranging bypass air intake passage in parallel at the forthright air intake passage of low pressure turbocharger, achieve air-flow walks around low pressure turbocharger function when low engine speeds and low-load, reduce the hesitation of turbosupercharger to the full extent, improve the reaction velocity of motor, improve the cornering ability of hoist.
In a schematic embodiment of the present utility model, as shown in Figure 6, two-stage turbocharging system to be arranged on motor 1 and to have air intlet A and exhaust outlet C, two-stage turbocharging system comprises: high pressure turbocharger 2, intercooler 3, low pressure turbocharger 4 and the bypass air intake passage 7 be connected in parallel with low pressure turbocharger 4, low pressure turbocharger 4 has the forthright air intake passage 6 connecting air intlet A, high pressure turbocharger 2 is connected with air intlet A by being connected in series low pressure turbocharger 4, high pressure turbocharger 2 also directly connects air intlet A by bypass air intake passage 7.
In this schematic embodiment, when motor 1 starts, motor is in the slow-speed of revolution and underrun, circulation area due to bypass air intake passage 7 is greater than the circulation area of the forthright air intake passage 6 of low pressure turbocharger 4, and intake resistance is little, air is walked around low pressure turbocharger 4 and is preferentially flowed into high pressure turbocharger 2 from bypass air intake passage 7, achieve the Quick-pressurizing of turbosupercharger, reduce the hesitation of turbosupercharger 4 to the full extent, improve the reaction velocity of motor 1, improve the cornering ability of hoist.
Further, as shown in Figure 6, two-stage turbocharging system preferably also comprises the electronically controlled proportional valve 5 be connected in parallel with high pressure turbocharger 2, electronically controlled proportional valve 5 can cross the flow of high pressure turbocharger 2 and electronically controlled proportional valve 5 by control flow check in proportion, makes the utility model two-stage turbocharging system possess single turbine supercharging and twin turbocharged two kinds of mode of operations.When motor 1 rotating speed is lower or exhaust pressure is lower, motor 1 needs higher supercharging, and electronically controlled proportional valve 5 makes low-pressure air enter motor 1 mainly through high pressure turbocharger 2; When motor 1 rotating speed is higher or exhaust pressure is higher, if there is no the stop of high pressure turbocharger 2 pairs of air-flows, low pressure turbocharger 4 can provide larger charge flow rate, and electronically controlled proportional valve 5 makes low-pressure air enter motor 1 mainly through low pressure turbocharger 4 and electronically controlled proportional valve 5.The working state that the flow that electronically controlled proportional valve 5 can cross high pressure turbocharger 2 and electronically controlled proportional valve 5 by control flow check coordinates motor 1 different, optimizes the working efficiency of motor 1.
In another preferred illustrative examples of the utility model, as shown in Figure 7, two-stage turbocharging system also comprises the channel valve assembly 8 be arranged on forthright air intake passage 6 and bypass air intake passage 7, and channel valve assembly 8 can control the on off operating mode of forthright air intake passage 6 and bypass air intake passage 7.When motor 1 starts, its rotating speed is lower or exhaust pressure is lower, motor 1 needs higher supercharging, valve member 8 makes major part or whole air enter high pressure turbocharger 2 by bypass air intake passage 7, avoid the hesitation that low pressure turbocharger causes, when motor 1 needs continuation to accelerate or exhaust pressure is higher, motor 1 needs higher supercharging, valve member 8 makes great majority or whole air first by low pressure turbocharger 4 supercharging, and then by high pressure turbocharger 2 supercharging further.Air valves assembly 8 can control to flow through forthright air intake passage 6 and the air mass flow of bypass air intake passage 7 under motor 1 different rotating speeds, effectively improves working efficiency and the applicability of pressurization system.
Channel valve assembly 8 can be preferably butterfly valve assembly, and channel valve assembly 8 is selected conventional butterfly valve to save manufacture cost and had higher reliability.In a preferred illustrative examples, as shown in Figure 8, butterfly valve assembly comprises valve rod 81, first valve disc 82 and the second valve disc 84, first valve disc 82 and the second valve disc 84 can be fixedly installed on valve rod 81 by the first set screw 83 and the second set screw 85 respectively, also can be fixedly installed on valve rod 81 by welding or other usual manner, by rotation valve rod 81, the first valve disc 82 and the second valve disc 84 can change the on off operating mode of forthright air intake passage 6 and bypass air intake passage 7 respectively.This butterfly valve modular construction is simple, easy to process and effectively can ensure the on-off function of valve member, has higher reliability.
Preferably, as shown in Figure 8, first valve disc 82 and the second valve disc 84 preferably orthogonal, for convenience of explanation, the first valve disc 82 is arranged on forthright air intake passage 6, and the second valve disc 84 is arranged on bypass air intake passage 7, when the first valve disc 82 blocks forthright air intake passage 6, forthright air intake passage 6 is closed condition, and bypass air intake passage 7 is opening state, and air directly enters high pressure turbocharger 2 from bypass air intake passage 7; When the second valve disc 84 blocks bypass air intake passage 7, forthright air intake passage 6 is opening state, and bypass air intake passage 7 is closed condition, and air enters low pressure turbocharger 4 and high pressure turbocharger 2 successively from forthright air intake passage 6.Mutually perpendicular first valve disc 82 and the second valve disc 84 can make forthright air intake passage 6 contrary to the on off operating mode of bypass air intake passage 7 to adapt to the supercharging needs of motor 1 under different rotating speeds.
Channel valve assembly 8 also can be preferably electromagnetism on-off valve assembly, and the electromagnetism on-off valve of control circui controls sensitive, efficient and convenient and has higher reliability and break-make stability.
In another preferred schematically embodiment of the utility model, as shown in Figure 9, two-stage turbocharging system also comprises the downstream and the compensation conduit 9 of connection forthright air intake passage 6 and bypass air intake passage 7 that are arranged on channel valve assembly 8.The impact that compensation conduit can reduce when airflow direction switches low pressure turbocharger 4 is set at forthright air intake passage 6 and bypass air intake passage 7, ensure that the working stability of low pressure turbocharger 4.Compensation conduit 9 can place obstacles to reduce circulation area in pipeline, also can arrange valve to change the circulation area of compensation conduit 9.Preferably, the caliber of compensation conduit 9 is preferably all less than the caliber of forthright air intake passage 6 and bypass air intake passage 7.Only the manufacture caliber of compensation conduit 9 need be limited in and be less than forthright air intake passage 6 with in the scope of the caliber of bypass air intake passage 7, channel valve assembly 8 is selected simple structure can achieve air-flow and is compensated, and pipeline is easy to process, has saved manufacture cost.
As the further improvement to above-described embodiment, two-stage turbocharging system also comprises control unit further, and control unit can control electronically controlled proportional valve 5 and channel valve assembly 8 according to engine speed S and engine load P.Control unit is demarcated motor 1, vehicle load is made to feed back in the gas handling system of motor 1 completely, according to nominal data, control unit controls the on off operating mode of electronically controlled proportional valve 5 and channel valve assembly 8 pairs of forthright air intake passages 6 and bypass air intake passage 7, optimize control strategy, effectively improve the automaticity of pressurized machine.
Particularly, as shown in Figure 10, control unit comprises controller 10, solenoid valve 11 and performs cylinder 12, controller 10 controls electronically controlled proportional valve 5 and solenoid valve 11 respectively by engine speed S and engine load P and preset calibrations parameter are carried out contrast, and solenoid valve 11 carrys out the opening state of control channel valve member 8 by the break-make controlling to perform cylinder 12 source of the gas.As shown in Figure 9 and Figure 10, calibrating parameters is passed to controller 10 by motor 1, the data transformations received becomes different electric currents to export by controller 10, electronically controlled proportional valve 5 accepts the electric current that controller 10 sends, and realizes the control to the air mass flow by high pressure turbocharger 2 and electronically controlled proportional valve 5; Solenoid valve 11 accepts the electric current that controller 10 sends, control the break-make performing cylinder 12 source of the gas, thus the aperture of control channel valve member 8 is to realize the control to forthright air intake passage 6 and bypass air intake passage 7 on off operating mode, this control unit achieves the selection of gas-entered passageway and the control of air circulation, there is higher practicability, certainly, control unit can also be the structural type that controller 10 directly controls channel valve assembly 8.
Thus, the utility model two-stage turbocharging system installation working procedure is on the engine as follows:
When motor 1 starts, rotating speed is lower or exhaust pressure is lower, motor 1 needs fast and higher supercharging, channel valve assembly 8 work makes major part or whole air enter high pressure turbocharger 2 by bypass air intake passage 7, and the air through supercharging enters motor by intercooler 3 condensation; When motor 1 needs continuation to accelerate or exhaust pressure is higher, motor 1 needs higher supercharging, and valve member 8 makes great majority or whole air first by low pressure turbocharger 4 supercharging, and then by high pressure turbocharger 2 supercharging further; When motor 1 rotating speed reaches at a high speed or exhaust pressure reaches high pressure, if there is no the stop of high pressure turbocharger 2 pairs of air-flows, low pressure turbocharger 4 can provide larger charge flow rate, electronically controlled proportional valve 5 and channel valve assembly 8 joint work make low-pressure air enter intercooler 3 condensation mainly through low pressure turbocharger 4 and electronically controlled proportional valve 5, finally enter motor 1, after motor 1 works produce tail gas successively through high pressure turbocharger 2 and low pressure turbocharger 4 and to turbine acting, finally enter air from exhaust outlet C.
The utility model additionally provides a kind of Mobile crane, and this Mobile crane has above-mentioned two-stage turbocharging system.Because two-stage turbocharging system achieves the function that air-flow walks around low pressure turbocharger when low engine speeds and low-load, reduce the hesitation of turbosupercharger to the full extent, improve the reaction velocity of motor, improve the cornering ability of hoist.Correspondingly, what the utility model provided move hoist also has above-mentioned beneficial effect, does not repeat them here.The utility model two-stage turbocharging system is particularly useful for the truck crane mainly operating in middle low speed.
The embodiment more than combined is described in detail for mode of execution of the present utility model, but the utility model is not limited to described mode of execution.Such as channel valve assembly 8 can also be the valve member of other routines.For a person skilled in the art, when not departing from principle of the present utility model and connotation, multiple change, amendment are carried out to these mode of executions, equivalence is replaced and modification still falls within protection domain of the present utility model.
Claims (13)
1. a two-stage turbocharging system, there is air intlet (A) and exhaust outlet (C), it is characterized in that, comprise: high pressure turbocharger (2), low pressure turbocharger (4) and the bypass air intake passage (7) be connected in parallel with described low pressure turbocharger (4), described low pressure turbocharger (4) has the forthright air intake passage (6) connecting described air intlet (A), described high pressure turbocharger (2) is connected with described air intlet (A) by being connected in series described low pressure turbocharger (4), described high pressure turbocharger (2) also directly connects described air intlet (A) by described bypass air intake passage (7).
2. two-stage turbocharging system according to claim 1, it is characterized in that, also comprise the electronically controlled proportional valve (5) be connected in parallel with described high pressure turbocharger (2), described electronically controlled proportional valve (5) can control the flow flowing through described high pressure turbocharger (2) and described electronically controlled proportional valve (5) in proportion.
3. two-stage turbocharging system according to claim 2, it is characterized in that, also comprise the channel valve assembly (8) be arranged on described forthright air intake passage (6) and described bypass air intake passage (7), described channel valve assembly (8) can control the on off operating mode of described forthright air intake passage (6) and described bypass air intake passage (7).
4. two-stage turbocharging system according to claim 3, is characterized in that, described channel valve assembly (8) is butterfly valve assembly.
5. two-stage turbocharging system according to claim 4, it is characterized in that, described butterfly valve assembly comprises valve rod (81), the first valve disc (82) and the second valve disc (84), described first valve disc (82) and described second valve disc (84) are fixedly installed on described valve rod (81), by rotating described valve rod (81), described first valve disc (82) and described second valve disc (84) change the on off operating mode of described forthright air intake passage (6) and described bypass air intake passage (7) respectively.
6. two-stage turbocharging system according to claim 5, is characterized in that, described first valve disc (82) and described second valve disc (84) orthogonal.
7. two-stage turbocharging system according to claim 3, is characterized in that, described channel valve assembly (8) is electromagnetism on-off valve assembly.
8. two-stage turbocharging system according to claim 3, it is characterized in that, also comprise the downstream that is arranged on described channel valve assembly (8) and connect the compensation conduit (9) of described forthright air intake passage (6) and described bypass air intake passage (7).
9. two-stage turbocharging system according to claim 8, is characterized in that, the caliber of described compensation conduit (9) is all less than the caliber of described forthright air intake passage (6) and described bypass air intake passage (7).
10. two-stage turbocharging system according to claim 3, it is characterized in that, also comprise control unit, described control unit can control described electronically controlled proportional valve (5) and described channel valve assembly (8) according to engine speed S and engine load P.
11. two-stage turbocharging systems according to claim 10, it is characterized in that, described control unit comprises controller (10), solenoid valve (11) and performs cylinder (12), described controller (10) controls described electronically controlled proportional valve (5) and described solenoid valve (11) respectively by described engine speed S and engine load P and preset calibrations parameter being carried out contrast, and described solenoid valve (11) controls the opening state of described channel valve assembly (8) by the break-make controlling described execution cylinder (12) source of the gas.
12. 1 kinds of hoists, is characterized in that, have the two-stage turbocharging system described in any one of claim 1 ~ 11.
13. hoists according to claim 12, is characterized in that, described hoist is truck crane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420831798.XU CN204402643U (en) | 2014-12-24 | 2014-12-24 | Two-stage turbocharging system and hoist |
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| CN201420831798.XU CN204402643U (en) | 2014-12-24 | 2014-12-24 | Two-stage turbocharging system and hoist |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386862A (en) * | 2015-12-24 | 2016-03-09 | 中国船舶重工集团公司第七一一研究所 | Adjusting method for air intake flow of supercharger compressor |
| CN105443237A (en) * | 2014-12-24 | 2016-03-30 | 徐州重型机械有限公司 | Two-stage turbocharging system and crane |
| CN109458253A (en) * | 2018-12-12 | 2019-03-12 | 中国船舶重工集团公司第七研究所 | Air compensating system and gas supply control method |
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2014
- 2014-12-24 CN CN201420831798.XU patent/CN204402643U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443237A (en) * | 2014-12-24 | 2016-03-30 | 徐州重型机械有限公司 | Two-stage turbocharging system and crane |
| CN105386862A (en) * | 2015-12-24 | 2016-03-09 | 中国船舶重工集团公司第七一一研究所 | Adjusting method for air intake flow of supercharger compressor |
| CN105386862B (en) * | 2015-12-24 | 2017-12-15 | 中国船舶重工集团公司第七一一研究所 | A kind of adjusting method of supercharger air compressor charge flow rate |
| CN109458253A (en) * | 2018-12-12 | 2019-03-12 | 中国船舶重工集团公司第七研究所 | Air compensating system and gas supply control method |
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