CN109774452B - Bevel gear type oil-electricity series-parallel hybrid power system - Google Patents
Bevel gear type oil-electricity series-parallel hybrid power system Download PDFInfo
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- CN109774452B CN109774452B CN201910160729.8A CN201910160729A CN109774452B CN 109774452 B CN109774452 B CN 109774452B CN 201910160729 A CN201910160729 A CN 201910160729A CN 109774452 B CN109774452 B CN 109774452B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 230000002457 bidirectional effect Effects 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 8
- 239000000446 fuel Substances 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
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- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
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- 230000007246 mechanism Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention discloses a bevel gear type oil-electricity hybrid power system which mainly comprises an engine, two motors, two inverters, a power battery, a two-way clutch, two locking clutches, sun gears with large bevel gears and small bevel gears respectively serving as rear rows and front rows, wherein a planetary gear set comprises three groups of bevel gears, a planet carrier can be connected with the engine through the two-way clutch, and a gear ring bevel gear outputs power. The system can solve the problem that a large motor is needed to provide enough power for a hybrid electric vehicle; the bevel gear transmission scheme is adopted, so that the bevel gear pair can bear higher load than the cylindrical gear pair, the transmission is more stable, the noise is relatively low, the power transmission direction can be changed, the power assembly can be arranged in front of the front shaft, and the arrangement is more flexible; thirdly, the motor driving device comprises pure electric driving, motor auxiliary driving and stepless speed change functions, has higher universality of used parts and is easy to realize scale industrialization.
Description
Technical Field
The invention relates to the field of power systems of oil-electricity hybrid electric vehicles, in particular to a bevel gear type oil-electricity hybrid power system.
Background
In recent years, with the aggravation of environmental pollution and fossil energy crisis, the sustainable development of the automobile industry is urgently needed to develop a novel energy automobile with environmental friendliness and low energy consumption to make up. The new energy automobile, namely the hybrid electric automobile with two power sources, not only improves the defects of poor emission and large noise of the traditional fuel oil automobile, but also overcomes the defects of small endurance mileage and higher battery cost of the pure electric automobile, and meanwhile, compared with the fuel cell automobile, the hydrogen is easy to explode when mixed with other gases, so the storage of the hydrogen and the guarantee of the safety of the hydrogen are difficult problems, and the application of the fuel cell automobile is limited. Therefore, in the middle and short stage, the hybrid electric vehicle as a transitional type combines motor drive and engine drive, not only can ensure the driving range of the vehicle, but also can save fuel and improve the environment, and in the current stage, the hybrid electric vehicle is still the best solution in the middle and short period, and has very good development trend and prospect.
Hybrid vehicles are generally classified into three structural types of series, parallel, and series-parallel. The series-parallel hybrid electric vehicle combines the advantages of the series connection type and the parallel connection type, and is an optimal structural scheme of the hybrid electric vehicle. One of the key technologies of the series-parallel hybrid power, namely the electronic continuously variable transmission EVT (Electrical Variable Transmission) of the power coupling system can realize the function of continuously variable transmission, maintain the efficient operation of the engine and furthest improve the economy of the whole vehicle.
The current series-parallel hybrid electric vehicle mainly adopts a planetary mechanism as a power splitting device, and typical structural forms comprise a THS system in Toyota and a general AHS system. The THS system adopts a single planetary row structure, belongs to an input type power split mode, has the advantages of simple structure and easy control, and can realize the function of electronic continuously variable transmission (EVT). However, the driving motor of the THS system is connected with the gear ring of the output piece, so that the performance requirement is higher, and in order to meet the requirement of good power obtaining performance, a motor with higher power level is required to be selected, so that the cost of the whole vehicle and the difficulty degree of installation are greatly increased; moreover, since the system is a cylindrical gear pair, the transmission shafts must be in a parallel relationship in space, and the transmission system has a certain limitation in arrangement.
Disclosure of Invention
The bevel gear type oil-electricity hybrid power system provided by the invention solves the problem that a large motor is needed to provide enough power for a hybrid power automobile, adopts a bevel gear pair for transmission, has the advantage that a cylindrical gear cannot be replaced, such as high bearing capacity, capability of changing the transmission direction and the like
In order to solve the technical problems, the invention is realized by adopting the following technical scheme: the bevel gear type oil-electricity hybrid power system mainly comprises an engine, two motors, two inverters, a power battery, a two-way clutch, two locking clutches, sun gears with big bevel gears and small bevel gears respectively serving as rear row and front row, planetary gear sets comprising three groups of bevel gears and an output gear ring.
The engine in the technical scheme is used as a power source output end and can be connected with the input end of the planet carrier through a bidirectional clutch; two ends of the two inverters are respectively connected with the two motors and the power battery through cables, meanwhile, the two inverters are also connected through cables, stator parts of the two motors are fixedly connected to the frame, and rotor parts are connected with input shafts of adjacent sun bevel gears through locking clutches;
according to the technical scheme, a front-row sun gear is connected to an input shaft of a planet carrier through a needle bearing, the front-row sun gear is in interference fit with an outer ring of the bearing, the inner ring of the bearing is also in interference fit with the input shaft of the planet carrier, one axial positioning end of the bearing is positioned by a shaft shoulder, one axial positioning end of the bearing is positioned by a sleeve, the sleeve is in clearance fit with the input shaft of the planet carrier, and the front-row sun gear and an innermost planet wheel are in a constant meshing state;
in the technical scheme, the connection relation between the rear-row sun gear and the rear-row sun gear shaft is spline connection, wherein the rear-row sun gear shaft can also be regarded as an output shaft of a motor II, and the rear-row sun gear and the intermediate planetary gear are in a constant meshing state;
according to the technical scheme, an output gear ring is next to a rear-row sun gear and is connected to a rear-row sun gear shaft through a deep groove ball bearing, the gear ring is in interference fit with the outer ring of the deep groove ball bearing, the inner ring of the deep groove ball bearing is also in interference fit with the rear-row sun gear shaft, one axial positioning end of the deep groove ball bearing is positioned by a shaft shoulder, one axial positioning end of the deep groove ball bearing is positioned by a sleeve, the fit between the sleeve and an input shaft of a planet carrier belongs to clearance fit, and the front-row sun gear and an outermost planet wheel belong to a constant meshing state;
the planetary gear set in the technical scheme has a complex structure and consists of four identical bevel gear sets, each bevel gear set consists of three bevel gears with different sizes, and the innermost bevel gear is used as the sun gear of the front row connected with the innermost planetary gear; the middle bevel gear is used as a middle end planet gear to be connected with a rear row of sun gears; the outermost bevel gear is used as an outermost planetary gear to be connected with an output gear ring; the three planetary gears are connected through a spline pair, a bushing with a spline and a pair of angular contact ball bearings are matched and connected with an output shaft of the planet carrier, and the output shaft of the planet carrier and an input shaft of the planet carrier are not integrated;
in the technical scheme, the rotation axes of an engine output shaft, a planet carrier input shaft, a rear row sun wheel shaft and an output shaft of a motor II are collinear, the plane where the output shafts (4) of the planet carrier are positioned is vertical to the rotation axes in space, and the rotation axes of the 4 planet wheels with the same structure are parallel to the rotation axes of the planet carrier;
according to the technical scheme, all bevel gears are packaged in a special gear box, splash lubrication can be adopted for lubrication of all the gears, and special lubricating oil for the bevel gears is needed to be used for the lubricating oil.
Compared with the prior art, the invention has the beneficial effects that:
1. the bevel gear type oil-electricity hybrid power system adopts a bevel gear transmission scheme, and skillfully utilizes the bevel gear pair to bear higher load than the cylindrical gear pair.
2. The bevel gear type oil-electricity hybrid power system adopts a bevel gear transmission scheme, skillfully utilizes a bevel gear pair to enable transmission to be more stable relative to a cylindrical gear pair, and has relatively low noise.
3. The bevel gear type oil-electricity hybrid power system adopts a bevel gear transmission scheme to change the power transmission direction, so that the power assembly can be arranged in front of the front shaft, and the arrangement is more flexible.
4. The bevel gear type oil-electricity hybrid power system skillfully utilizes the bidirectional combination of the clutch C1, can lock the planet carrier and can be combined with the engine, so that the switching among modes of the whole vehicle is more convenient, compared with other existing configurations, the use of a locking clutch and a brake is reduced, the system is more compact, and the cost is reduced.
5. According to the bevel gear type oil-electricity hybrid power system, the first motor is close to the engine, so that the working environment temperature is influenced by the temperature of the engine to a certain extent, and the working efficiency of the first motor can be improved.
6. The bevel gear type oil-electricity hybrid power system can realize a pure electric mode, and comprises a pure electric automobile and a pure electric running mode, so that idle oil consumption of an engine can be eliminated, and the economy of the whole automobile is improved.
7. The bevel gear type oil-electricity hybrid power system can realize an electronic stepless speed change (EVT) mode, and can ensure that an engine works near an optimal fuel consumption curve through controlling a motor, and the economy of the whole vehicle is improved.
8 the bevel gear type oil-electricity hybrid power system can realize a braking energy recovery mode, and the economy of the whole vehicle can be improved through electricity comparison, so that the bevel gear type oil-electricity hybrid power system is particularly suitable for urban road traffic.
9. The bevel gear type oil-electricity hybrid power system can properly reduce the power torque requirement of an engine when being matched with a whole vehicle, and can select a relatively small-sized engine, so that the emission pollution caused by the engine can be reduced.
Description of the drawings:
FIG. 1 is a schematic diagram illustrating the structural composition and working principle of a bevel gear type oil-electricity hybrid power system according to the present invention;
FIG. 2 is a structural assembly diagram illustrating key components in a bevel gear type oil-electricity hybrid power system structure according to the invention, wherein the bevel gear type planetary gear set is provided with a bevel gear type planetary gear set;
fig. 3 is a schematic diagram of a driving force transmission route of the bevel gear type hybrid electric system in a pure electric mode;
fig. 4 is a schematic diagram of a driving force transmission path of the bevel gear type hybrid electric vehicle system in a dual motor driving mode;
FIG. 5 is a schematic diagram of a driving force transmission path of the bevel gear type hybrid electric powertrain in an engine start mode according to the present invention;
FIG. 6 is a schematic diagram of a driving force transmission path of the bevel gear hybrid electric system of the present invention during power generation by an EVT mode motor;
FIG. 7 is a schematic diagram of a driving force transmission path of the bevel gear type hybrid electric powertrain with power assist for an EVT mode motor;
FIG. 8 is a schematic diagram of a driving force transmission path of the bevel gear type hybrid electric vehicle system in a regenerative braking mode according to the present invention;
fig. 9 is an engine operation map according to the present invention.
In the figure: 1. the engine, 2, two-way clutch, 3, inverter one, 4, motor one, 5, power battery, 6, inverter two, 7, motor two, 8, carrier assembly, 9, lockup clutch C3,10, output ring gear, 11, final drive, 12, right-hand sun gear, 13, planet gear one, 14, planet gear two, 15, planet gear three, 16, left-hand sun gear, 17, lockup clutch C2,18, wheels, 19, carrier input shaft, 20, needle bearing, 21, left-hand sun gear, 22, innermost planet gear, 23, sleeve one, 24, intermediate planet gear, 25, sleeve two, 26, outermost planet gear, 27, sleeve three, 28, carrier output shaft, 29, angular ball bearing one, 30, externally splined bushing 31, output ring gear, 32, right-hand sun gear, 33, angular ball bearing two, 34, deep groove ball bearing 35, sleeve four, 36, right-hand sun gear input shaft, 37, retainer ring 38, 39, sleeve one, 40, 41, thrust bearing two, 42, and 42.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
the invention aims to provide a novel oil-electricity series-parallel hybrid power system, namely a bevel gear type oil-electricity series-parallel hybrid power system, so as to realize the electronic stepless speed change function of the series-parallel hybrid power system, control an engine to work in an optimal fuel economy area, improve the fuel economy of the whole automobile, realize low emission and solve the problem that a large motor is needed by the series-parallel hybrid power automobile to provide enough power; and the bevel gear transmission scheme is adopted, so that the bevel gear pair is skillfully utilized, higher load can be borne relative to the cylindrical gear pair, the transmission is more stable, the noise is relatively low, the power transmission direction can be changed, the power assembly can be arranged in front of the front shaft, and the arrangement is more flexible. And the driving mode comprises pure electric driving, motor auxiliary driving and stepless speed change functions, and can well meet the requirements of various working conditions.
Referring to fig. 1, the bevel gear type hybrid electric system mainly comprises an engine (1), a bidirectional clutch (2), an inverter I (3), a motor I (4), a power battery (5), an inverter II (6), a motor II (7), a planet carrier assembly (8), a locking clutch C3 (9), an output gear ring (10), a main speed reducer (11), a rear-row sun gear (12), an innermost planetary gear (13), a middle-end planetary gear (14), an outermost planetary gear III (15), a front-row sun gear (16), a locking clutch C2 (17), wheels (18) and input and output shafts of corresponding cables and components.
The engine (1), the first motor (4), the second motor (7), the inverter (6) and the power battery (5) can be all made of the existing products, and the specific selection is combined with the basic parameters and design requirements of the whole vehicle of a manufacturer.
The following focuses on the mechanical structure of the invention:
the front-row sun gear (16) adopts a bevel gear, the front end of the shaft of the sun gear is controlled by a locking clutch C2 (17) to be connected with an output shaft of a first motor or not, the locking clutch can adopt electromagnetic servo, wherein an electric wire can be embedded in the output shaft of the first motor, the shafts are hollow shafts, firstly, the weight reduction of the assembly is considered, and secondly, the arrangement of a cable and the lubrication of a bearing, bevel gear and other objects are considered;
in detail, referring to fig. 2, the front sun gear (21) is located on the planet carrier input shaft (19), but the two parts are required to realize relatively independent rotation, and in consideration of size, arrangement and the like, a needle bearing (20) is selected to ensure the function, and as shown in the figure, the planet carrier input shaft (19) is a stepped shaft with thin left and thick right, and during assembly, an inner ring of the needle bearing (20) is in interference fit with the shaft (19), so that the assembly can consider oil bath heating of the inner ring of the bearing; because the pretightening force during engagement needs to be regulated when the bevel gears are engaged, if the axial position of the bevel gears is unsuitable, the pretightening force is too small, larger vibration and noise are brought during transmission, and the stability of the transmission is seriously affected, the invention considers that the gasket is used for regulation, namely the gasket is placed on the left side of the axial positioning of the front row of sun gears, the pretightening force of the gasket is increased when the gasket is increased, the pretightening force of the gasket is reduced when the gasket is reduced, the number of the gaskets is optionally determined, the axial positioning of the right end of the front row of sun gears (21) is as shown in fig. 2, the right side of the thrust bearing leans against the shaft shoulder by a second thrust bearing (43), and the structure ensures that the bevel gears can independently rotate independent of the planet carrier access shaft (19);
the rear-row sun gear (33) is also a bevel gear, the pretightening force is regulated in the same mode as the front-row sun gear in the axial positioning mode, but the pretightening force is different from the front-row sun gear in the following steps: is larger in size than the front-row sun gear (21) because it is in constant mesh with the intermediate planetary gear (24), and needs to be distinguished from the front-row sun gear in that: the rotation of the rear-row sun gear and the rotation of the right-row sun gear input shaft (36) are in a synchronous state, and the technical means for ensuring the function is that the rear-row sun gear (33) and the input shaft (36) are connected by adopting involute splines, the axial positioning at the left side of the rear-row sun gear is fixed by a first check ring (37), and the first check ring (37) is fastened on the rear-row sun gear input shaft (36) by a bolt (39) and a gasket (38) and rotates together with the rear-row sun gear input shaft;
the specific structure of the planet carrier and the planet wheel set of the invention can refer to fig. 2, firstly, the outermost planet wheel (26), the middle planet wheel (24) and the innermost planet wheel (22) have the rotation axes which are perpendicular to the rotation axes of the front-row sun wheel (21) and the rear-row sun wheel (33), and the three planet wheels have the same output rotation speed, and the rotation state is independent of the output shaft (28) of the planet carrier, so that the three planet wheels are connected to a bushing (30) with external splines in the way of involute spline connection;
the technical means for solving the problem that the rotation state of three planetary gears can be independent of an output shaft (28) of a planetary carrier is that the spline bushing (30) is realized through a pair of angular contact ball bearings (29) and (33) which are installed in the forward direction, namely, the outer ring of the angular contact ball bearings is in interference fit with the bushing, the inner ring is in interference fit with the shaft neck of the output shaft (28) of the planetary carrier, one end of the axial positioning of the bearing is close to a shaft shoulder, and the other end of the axial positioning of the bearing is close to a thrust bearing; looking at the axial positioning mode of the planet gears, the outer side of the outermost planet gear is positioned by a thrust bearing, the inner side is positioned by a sleeve (25), both sides of the middle bevel gear are positioned by positioning sleeves, namely (25) and (23), the positioning mode of the innermost planet gear is an inner side thrust bearing, and the outer side is positioned by a sleeve (23);
the positioning modes of the thrust bearings on the output shafts of the planetary carriers are that one side is propped against the bevel gears of the planetary gears, and the other side is positioned by a mode of clamping springs and check rings; whole vehicle state pattern analysis
1. Starting state
1, pure electric starting mode
Referring to fig. 1 and 3, when the power required by the vehicle is low and the electric quantity of the battery is abundant, the vehicle-mounted power battery provides electric energy, the motor II outputs torque, the engine and the motor I are in a closed state, the Vehicle Control Unit (VCU) determines corresponding target torque according to a pedal signal of a driver, the clutch C1 is connected with the frame, the input shaft of the planet carrier is locked, the clutch C2 is in a disconnected state, the front planet row and the rear planet row directly break the power transmission, the clutch C3 is in a locked state, the output shaft of the motor II is connected with the input shaft of the rear sun gear to ensure that the driving force transmission route is as shown in fig. 3, all the energy for driving the vehicle comes from the power battery, and the motor II converts the electric energy into mechanical energy and outputs the mechanical energy to the wheels through the speed reducer.
2, starting the engine starting mode
Referring to fig. 1 and 5, when the power demand of the vehicle is high and the battery power is low, the engine is started by the first motor, and after the engine is started, in order to ensure stable starting and good power performance, the MG2 can be used to compensate the torque output appropriately according to the demand and the battery power. At this time, the clutch C1 is connected with the output shaft of the engine, so as to ensure that the output shaft of the engine is connected with the input shaft of the planet carrier, the clutch C2 is in a locking state, so as to ensure that a part of energy can be converted into electric energy through the first mechanical energy of the motor, the front planet row and the rear planet row directly break off the power transmission, the state of the clutch C3 is changed along with the load, when the load is larger, the battery electric quantity is not particularly low, the clutch C3 is locked, the second motor is in a boosting state, the driving force transmission route is shown in fig. 5, most of energy for driving the vehicle comes from the engine, and the first motor is in a power generation state.
2. Advancing state
1, single motor driven pure electric mode
The mode is the same as the pure electric starting power transmission path, and therefore description thereof will be omitted.
3, double-motor driving pure electric mode
Referring to fig. 1 and 4, the engine is not operated, and the motor MG1 and the motor MG2 are simultaneously driven to operate. At this time, the clutch C1 is connected with the frame, so as to ensure that the input shaft of the planet carrier is in a locking state, the clutch C2 is in a locking state, so as to ensure that the output shaft of the first motor can be connected with the front-row sun gear, the clutch C3 is in a locking state, the driving force transmission route is shown in fig. 4, all the energy for driving the vehicle comes from the power battery, and then the two motors convert the electric energy into mechanical energy and output the mechanical energy to the wheels through the speed reducer.
4, EVT mode
Referring to fig. 1, 6 and 7, a part of output power of an engine is input to a speed reducer through a mechanical path through a planetary row and is further output to wheels, another part of output power is converted into electric energy through mechanical energy by a first motor, the electric energy is charged into a power battery through an inverter, the power battery outputs the energy and is transmitted to a second motor through the inverter, the second motor converts the electric energy into mechanical energy and drives the whole vehicle, and when the electric quantity of the power battery is redundant and the required power is larger, the second motor can participate in assisting; in this mode. At this time, the clutch C1 is connected with the output shaft of the engine, so as to ensure that the output shaft of the engine is connected with the input shaft of the planet carrier, the clutch C2 is in a locking state, so as to ensure that the output shaft of the first motor can be connected with the front-row sun gear, the clutch C3 is in a locking state, the second motor is in an output power state, the driving force transmission route is shown in fig. 6 and fig. 7, the driving vehicles are generally all from the engine, the power battery plays an intermediate role, but when the required power is high, the power battery can also output electric power additionally.
In this mode, the engine can be operated near its optimal operating curve by adjusting the rotational speed and torque of the two electric machines due to decoupling of the engine and road load, as can be seen in fig. 9.
3. Braking energy recovery state
Referring to fig. 1 and 8, when the driver presses the brake pedal, if the braking force provided by the motor MG2 meets the requirement as the braking is not emergency braking, the braking force is provided by the motor two entirely, and the recovered energy is stored in the power battery; if the emergency braking is performed, that is, the maximum braking force provided by the second motor can not meet the requirement, the energy braked by the second motor can be stored in the power battery by the aid of the traditional braking, and the other part of energy braked by the mechanical brake is dissipated into the air in the form of heat energy.
Claims (1)
1. The bevel gear type oil-electricity hybrid power system comprises an engine (1), an inverter I (3), an inverter II (6), a motor I (4) and a motor II (7), and is characterized by comprising a bidirectional clutch (2), a locking clutch C3 (9) and a locking clutch C2 (17), a front-row sun gear (16) formed into a bevel gear, a planet wheel I (13) formed into a bevel gear, a planet wheel II (14) and a planet wheel III (15), wherein the sizes of the planet wheel I (13), the planet wheel II (14) and the planet wheel III (15) are different, a rear-row sun gear (12) formed into a bevel gear and an output gear ring (10) comprising a bevel gear part;
the output end of the engine (1) is connected with the planet carrier assembly (8) through the bidirectional clutch (2); one end of the first inverter (3) is connected with the first motor (4) through a wire, the other end of the first inverter is connected with the power battery (5), one end of the second inverter (6) is connected with the second motor (7) through a wire, and the other end of the second inverter is connected with the power battery (5);
the stator part of the motor I (4) is fixedly connected to the frame; the rotor part is connected with the rotating shaft of the front row of sun gears (16) through a locking clutch C2 (17); the stator part of the second motor (7) is fixedly connected to the frame; the rotor part is connected with the rotating shaft of the rear-row sun gear (12) through a locking clutch C3 (9);
the two-way clutch (2) has two connection states, wherein the first state is that the engine (1) is connected with the planet carrier assembly (8), and the second state is that the planet carrier assembly (8) is connected with the frame; the locking clutch C2 (17) has two connection states, wherein the first state is that the output end of the motor I (4) is combined with the front-row sun gear (16), and the second state is that the output end of the motor I (4) is disconnected with the front-row sun gear (16); the locking clutch C3 (9) has two connection states, wherein the first state is that the output end of the second motor (7) is combined with the rear-row sun gear (12), and the output end of the second motor (7) is disconnected with the rear-row sun gear (12);
the first planetary gear (13), the second planetary gear (14) and the third planetary gear (15) are connected to a hollow sleeve through a spline, and the hollow sleeve is sleeved on the rear end shaft of the planet carrier through a bearing, so that the hollow sleeve can rotate and the revolution of the planet carrier is not influenced;
the front-row sun gear (16) is meshed with the first planet gear (13), the rear-row sun gear (12) is meshed with the second planet gear (14), the bevel gear part of the output gear ring (10) is meshed with the third planet gear (15), and the other end of the output gear ring is connected with the main speed reducer (11) in a transmission mode through a gear pair to transmit power to drive the wheels through a half shaft;
the number of the first planet gears (13), the second planet gears (14) and the third planet gears (15) is the same and is 3 or 4, and the first planet gears, the second planet gears and the third planet gears are equally distributed in the circumferential direction;
the bidirectional clutch (2) can be shifted by a shifting fork, the root of the bidirectional clutch is connected with an input shaft of the planet carrier assembly (8) by a spline, and a shifting fork rod is hydraulically driven; the locking clutch C3 (9) and the locking clutch C2 (17) are electromagnetic clutches, the power output shafts of the two motors are hollow shafts, and electric wires for controlling the locking clutch C3 or the locking clutch C2 are communicated inside the hollow shafts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910160729.8A CN109774452B (en) | 2019-03-04 | 2019-03-04 | Bevel gear type oil-electricity series-parallel hybrid power system |
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| CN201910160729.8A CN109774452B (en) | 2019-03-04 | 2019-03-04 | Bevel gear type oil-electricity series-parallel hybrid power system |
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| CN109774452A CN109774452A (en) | 2019-05-21 |
| CN109774452B true CN109774452B (en) | 2024-04-12 |
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| CN112555365B (en) * | 2020-11-12 | 2023-11-24 | 中国人民解放军总参谋部第六十研究所 | Stepless speed change system and method for double-engine helicopter rotor wing |
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