CN203604021U

CN203604021U - Exhaust turbine generating device

Info

Publication number: CN203604021U
Application number: CN201320720365.2U
Authority: CN
Inventors: 邓彪; 简晓春; 吴红洋; 吴春江; 施夏
Original assignee: Chongqing Jiaotong University
Current assignee: Chongqing Jiaotong University
Priority date: 2013-11-15
Filing date: 2013-11-15
Publication date: 2014-05-21
Anticipated expiration: 2023-11-15

Abstract

The utility model belongs to the field of energy conservation and emission reduction of automobile engines, and particularly relates to an exhaust turbine generating device. The exhaust turbine generating device comprises an executing mechanism and a control mechanism. The executing mechanism comprises a turbine, an electromagnetic clutch, a gear reducer and an electric generator, wherein the turbine, the electromagnetic clutch, the gear reducer and the electric generator are sequentially connected. A turbine shaft is connected with a driving part of the electromagnetic clutch, a driven part of the electromagnetic clutch is connected with a driving shaft of the gear reducer, and a driven shaft of the gear reducer is connected with an electric generator shaft through a coupler. The control mechanism comprises a rotation speed sensor, a single-chip microcomputer and a normally-closed switch of the electromagnetic clutch, wherein the rotation speed sensor, the single-chip microcomputer and the normally-closed switch are sequentially and electrically connected. The rotation speed sensor is arranged on the turbine shaft. The exhaust turbine generating device overcomes the shortcomings that due to the fact that the rotation speed of the turbine shaft is excessively high, the electric generator shaft connected with the turbine shaft rotates in an overloading mode and the electric generator is in an overloading state for a long time and the electric generator may be burnt for an exhaust turbine generating device in the prior art, is improved and can carry out overload protection on the electric generator.

Description

A kind of exhaust gas turbine electricity generating device

Technical field

The utility model belongs to that motor car engine is energy-conservation, reduction of discharging field, particularly a kind of exhaust gas turbine electricity generating device.

Background technique

Fuel the produced heat energy that burns in cylinder, only has 20% ~ 45% to be converted to effective mechanical work.Its waste heat energy loses by approach such as exhaust, cooling medium and component surface heat radiations, and the energy that wherein waste gas is taken away accounts for 30% ~ 40% of total energy.Visible, reclaim the energy that contains in waste gas to realizing vehicle energy saving, improve energy utilization rate and have very important significance.

Utilizing at present the most ripe technology of energy of engine's tail gas is exactly exhaust-gas turbocharging system, waste gas turbine generating system changes the gas compressor of exhaust-gas turbocharging system into generator in fact exactly, the axle of turbo machine connects with generator shaft, but their combination has produced new problem: motor exhaust discharge capacity has determined the speed of the wheel rotation speed of turbo machine; In the time that high engine speeds turns round, the amount of discharging tail gas continues to increase, the axial length time of turbo machine turns round in high rotating speed, high-load range, generator shaft also runs up under turbine shaft drives simultaneously, conventionally the mechanical strength of alternator shaft is far below turbine shaft intensity, the mechanical load of alternator shaft continues to raise, and the rotating shaft of final generator damages because not bearing so strong load, also can damage generator when serious.

Model utility content

Technical problem to be solved in the utility model is for exhaust gas turbine electricity generating device in prior art; the rotating speed of turbine shaft is too fast; cause coupled alternator shaft overload operation; may burn the defect of generator; a kind of rear exhaust gas turbine electricity generating device that improves is provided, can carries out overload protection to generator.

In order to solve the problems of the technologies described above, the utility model provides following technological scheme: a kind of exhaust gas turbine electricity generating device, comprise actuator and control mechanism, actuator comprises the turbo machine, magnetic clutch, gear reducer and the generator that connect successively, wherein, the axle of turbo machine is connected with the driving link of magnetic clutch, and the driven member of magnetic clutch is connected with gear reducer driving shaft, and gear reducer driven shaft is connected with generator shaft by coupling; Control mechanism comprises the normally closed switch of speed probe, single-chip microcomputer and the magnetic clutch of electrical connection successively, and speed probe is located on turbine shaft.

Working principle of the present utility model is as follows: car engine rear engine is discharged tail gas gradually, tail gas drives the wheel rotation of turbo machine, in the time of wheel rotation, turbine shaft rotates under impeller drives, and then drive the driving link of magnetic clutch to rotate, the normally closed switch closure of single-chip microcomputer output low level SC sigmal control magnetic clutch, the driving link of magnetic clutch and driven member adhesive, thereby the driving link that makes magnetic clutch drives the driven member of magnetic clutch to rotate, the driven member driven gear retarder driving shaft of magnetic clutch rotates, gear reducer driving shaft driving gear retarder driven shaft rotates, gear reducer driven shaft drives generator shaft to rotate by coupling, finally make generator generating,

Collect turbine shaft tach signal when too high when being located at speed probe on turbine shaft, this signal is passed to single-chip microcomputer by speed probe, single-chip microcomputer is exported the normally closed switch of high level signal control magnetic clutch and is opened after processing, the driving link of magnetic clutch and the driven member of magnetic clutch are separated; The axle of generator stops operating gradually;

In the time that the speed probe on turbine shaft collects the normal signal of turbine shaft rotating speed, signal is passed to single-chip microcomputer by speed probe, single-chip microcomputer is controlled the normally closed switch closure of magnetic clutch, the driving link of magnetic clutch and the adhesive again of the driven member of magnetic clutch after processing; Generator shaft is rotated again gradually.

The electric energy that generator produces can be directly used on automobile and also can carry out energy storage with energy storage device separately.

Magnetic clutch relies on the switching electricity of coil to carry out the Engage and disengage of solenoidoperated cluthes, determines that the normally closed switch of coil switching electricity is by Single-chip Controlling.

The beneficial effects of the utility model are as follows: the tail gas that 1, utilizes motor to discharge generates electricity, and has improved the utilization ratio of engine power, has saved the energy.

2, between turbine shaft and gear reducer, be provided with magnetic clutch, and the adhesive of magnetic clutch with separate by Single-chip Controlling, the turbine shaft tach signal that single-chip microcomputer gathers according to the speed probe of being located on turbine shaft, control magnetic clutch adhesive with separate, when speed probe collects the rotating speed of turbine shaft when too high (may exceed the load capacity of generator shaft), single-chip microcomputer sends high level signal, separate magnetic clutch, gear reducer and turbine shaft driving force are temporarily disappeared, gear reducer does not have power source just to stop gradually, accordingly, generator shaft also just stops, play the overload protection to generator shaft.

Further, generator is connected with storage battery by rectification circuit; The electrical power storage of generator is got up.

Further, the casing of described gear reducer is provided with oil leab; The oil leab lubricant oil that makes can circulate in gear reducer, is lubricated with cooling swing pinion and swivel bearing, improves the operating life of gear reducer.

Accompanying drawing explanation

Structural representation when Fig. 1 is the magnetic clutch adhesive of a kind of exhaust gas turbine electricity generating device of the utility model;

Fig. 2 be a kind of exhaust gas turbine electricity generating device of the utility model magnetic clutch separate time structural representation.

Embodiment

As shown in Fig. 1,2, the utility model is a kind of exhaust gas turbine electricity generating device, comprises actuator and control mechanism, and actuator comprises the turbo machine, magnetic clutch, gear reducer 17 and the generator 9 that connect successively, wherein, turbo machine comprises volute 1, turbine shaft 21 and impeller 3; Magnetic clutch comprises the driving link 5 of magnetic clutch, driven member 6 and the magnetic clutch normally closed switch 19 of magnetic clutch; Gear reducer 17 comprises driving shaft 12, driven shaft 8, is located at the driving gear 14 on driving shaft 12 and is located at the driven gear 11 on driven shaft 8, and wherein, driving gear 14 engages with driven gear 11;

Turbine shaft 21 is connected with the driving link 5 of magnetic clutch, and the driven member 6 of magnetic clutch is connected with the driving shaft 12 of gear reducer 17, and the driven shaft 8 of gear reducer 17 is connected with generator 9 axles by coupling 10;

Control mechanism comprises speed probe 20, single-chip microcomputer and the magnetic clutch normally closed switch 19 of electrical connection successively, and speed probe 20 is located on turbine shaft 21.

Wherein, single-chip microcomputer adopts AT89C51 model, and magnetic clutch is many friction plates of normal close type dry type magnetic clutch, and speed probe 20 is magnetic resistance speed sensor, and model is CZX-01.

In the time that motor car engine turns round, the High Temperature High Pressure that exhaust manifold is discharged tail gas is at a high speed entered in volute 1 and is got on impeller 3 by the suction port of volute 1, and impeller 3 is the mechanical energy that drives turbine shaft 21 to rotate by the kinetic energy of tail gas, pressure energy, thermal power transfer; The driving shaft 12 of turbine shaft 21 actuation gear retarders 17 rotates, (turbine shaft 21 is connected with the driving link 5 of magnetic clutch, the driven member 6 of magnetic clutch is connected with the driving shaft 12 of gear reducer 17), driving shaft gear 14 engages with driven shaft gear 11, driving shaft 12 drives driven shaft 8 to rotate, driven shaft 8 is fastenedly connected by coupling 10 and the running shaft of generator 9, drives generator 9 rotary electrifications.

When original state, magnetic clutch normally closed switch 19 is in closed state, magnetic clutch energising adhesive, and the driving link 5 of magnetic clutch is to magnetic clutch driven member 6 transferring power, and turbine shaft 21 rotates with regard to driven gear retarder driving shaft 12.Speed probe 20 constantly detects the rotating speed of turbine shaft 21; in the time that the rotating speed of turbine shaft 21 reaches certain value (critical value of hypervelocity); speed probe 20 sends signal to single-chip microcomputer; single-chip microcomputer after treatment; magnetic clutch normally closed switch 19 is disconnected; magnetic clutch separates with regard to power-off, like this rotary shaft rotating speed is limited in certain rotating speed, reaches the object of overload protection.

The utility model is provided with the oil leab 15 that is communicated with engine lubrication system (not marking in figure) on gear reducer 17, lubricant oil from engine lubrication system flows into by oil leab 15 to bearing and gear lubrication from lubricating oil inlet 16, also have certain cooling action simultaneously, finally flow back into engine lubrication system from lubricating oil outlet 7.

Generator 9 of the present utility model is rare earth permanent-magnetic generator, rare earth permanent-magnetic generator does not need collector ring and brushgear compared with traditional generator, there is no friction, contact loss between excitation loss and electric brush slip ring, made the efficiency of generator higher than the generator 15-30% of traditional excitation-type; Simple in structure, reliable; Volume is little, and quality is light; Loss is little, failure rate is low.

Above-described is only preferred implementation of the present utility model; should be understood that; for a person skilled in the art; do not departing under the prerequisite of the utility model structure; can also make some distortion and improvement; these also should be considered as protection domain of the present utility model, and these can not affect effect and practical applicability that the utility model is implemented.

Claims

1. an exhaust gas turbine electricity generating device, it is characterized in that: comprise actuator and control mechanism, actuator comprises the turbo machine, magnetic clutch, gear reducer and the generator that connect successively, wherein, the axle of turbo machine is connected with the driving link of magnetic clutch, the driven member of magnetic clutch is connected with gear reducer driving shaft, and gear reducer driven shaft is connected with generator shaft by coupling; Control mechanism comprises the normally closed switch of speed probe, single-chip microcomputer and the magnetic clutch of electrical connection successively, and speed probe is located on turbine shaft.

2. exhaust gas turbine electricity generating device as claimed in claim 1, is characterized in that: described generator is connected with storage battery by rectification circuit.

3. exhaust gas turbine electricity generating device as claimed in claim 1, is characterized in that: the casing of described gear reducer is provided with oil leab.