CN112208631A - Electro-hydraulic steering system with double oil sources - Google Patents
Electro-hydraulic steering system with double oil sources Download PDFInfo
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- CN112208631A CN112208631A CN202011135937.1A CN202011135937A CN112208631A CN 112208631 A CN112208631 A CN 112208631A CN 202011135937 A CN202011135937 A CN 202011135937A CN 112208631 A CN112208631 A CN 112208631A
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- supply pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/30—Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means
Abstract
The invention discloses an electro-hydraulic steering system with double oil sources, which comprises a front axle oil tank and a rear axle oil tank, wherein a front axle loop is connected to the front axle oil tank, the rear axle oil tank is respectively connected with one end of a first rear axle oil supply pipe and one end of a first rear axle oil return pipe, a constant-pressure variable pump is connected to the first rear axle oil supply pipe, the other ends of the first rear axle oil supply pipe and the first rear axle oil return pipe are respectively connected with a power-assisted alignment control valve block, the power-assisted alignment control valve block is connected with a power-assisted cylinder and an alignment cylinder through a hydraulic oil pipe, the first rear axle oil supply pipe is connected with one end of a second rear axle oil supply pipe, the other end of the second rear axle oil supply pipe is connected with an electromagnetic directional valve, the electromagnetic directional valve is respectively connected with one end of an energy storage oil pipe and one end of a second rear axle oil return pipe, the other end of the energy storage oil pipe is connected with an energy accumulator, and the other end of the second. The electro-hydraulic steering system with the double oil sources is safe and reliable.
Description
Technical Field
The invention relates to the field of vehicles, in particular to a hydraulic steering system of a missile launching vehicle.
Background
With the continuous improvement of the requirements on the reliability and the actual combat of a weapon system, the pure electric driven missile launching vehicle gradually replaces the traditional fuel oil driven launching vehicle and becomes one of the main development directions in the future. In traditional fuel drive launch vehicle, the hydraulic system pump source that turns to mainly leans on the engine drive, turns to when preventing the engine accident to flame out and loses power, generally backs up one set of emergency pump source device in other drive mechanism departments such as transfer case, and this emergency pump can rely on the vehicle to slide power and maintain work, guarantees that the vehicle has the function of turning to when walking all the time. And pure electric drive's launching vehicle, because do not have traditional transmission mechanism such as engine, gearbox, transfer case, the hydraulic system pump source that turns to is all driven by the motor, and power relies on whole car high voltage distribution, in case whole car high voltage electricity appears unusually, all motors lose power, must lead to turning to hydraulic system and become invalid, and whole car goes and has high potential safety hazard.
Disclosure of Invention
The invention aims to provide a safe and reliable electro-hydraulic steering system with double oil sources.
The invention relates to an electro-hydraulic steering system with double oil sources, which comprises a front axle oil tank and a rear axle oil tank, wherein a front axle loop is connected on the front axle oil tank, the rear axle oil tank is respectively connected with one end of a first rear axle oil supply pipe and one end of a first rear axle oil return pipe, the first rear axle oil supply pipe is connected with a constant-pressure variable pump, the other ends of the first rear axle oil supply pipe and the first rear axle oil return pipe are respectively connected with the power-assisted alignment control valve block, the power-assisted alignment control valve block is connected with the power-assisted cylinder and the alignment cylinder through a hydraulic oil pipe, the first rear axle oil supply pipe is connected with one end of the second rear axle oil supply pipe, the other end of the second rear axle oil supply pipe is connected with an electromagnetic directional valve which is respectively connected with one end of an energy storage oil pipe and one end of a second rear axle oil return pipe, the other end of the energy storage oil pipe is connected with an energy accumulator, and the other end of the second rear axle oil return pipe is connected with the first rear axle oil return pipe or the rear axle oil tank.
The invention relates to an electro-hydraulic steering system with double oil sources, wherein the number of constant-pressure variable pumps is two, and the two constant-pressure variable pumps are connected to an oil supply pipe of a first rear axle in a parallel mode.
The invention relates to an electro-hydraulic steering system with double oil sources, wherein a first safety valve oil pipe is connected between a first rear axle oil supply pipe and a first rear axle oil return pipe, and a safety valve is connected on the first safety valve oil pipe.
The invention relates to an electro-hydraulic steering system with double oil sources, wherein two or more power-assisted alignment control valve blocks are arranged, the other end of a first rear axle oil supply pipe is provided with two or more branch oil supply pipes in a parallel connection mode, the other end of the first rear axle oil return pipe is provided with two or more branch oil return pipes in a parallel connection mode, the number of the branch oil supply pipes and the number of the branch oil return pipes are the same as that of the power-assisted alignment control valve blocks, one branch oil supply pipe and one branch oil return pipe form a pair of branch oil supply pipes and a branch oil return pipe, and each power-assisted alignment control valve block is respectively connected with the pair of the branch oil supply pipes and the branch oil return pipes.
The invention relates to an electro-hydraulic steering system with double oil sources, wherein the number of power-assisted alignment control valve blocks is three, the other end of a first rear axle oil supply pipe is provided with three branch oil supply pipes in a parallel connection mode, the other end of the first rear axle oil return pipe is provided with three branch oil return pipes in a parallel connection mode, one branch oil supply pipe and one branch oil return pipe form a pair of branch oil supply pipes and a branch oil return pipe, and each power-assisted alignment control valve block is respectively connected with the pair of branch oil supply pipes and the branch oil return pipe.
The invention relates to an electro-hydraulic steering system with double oil sources, wherein the number of the power-assisted alignment control valve blocks is four, the other end of a first rear axle oil supply pipe is provided with four branch oil supply pipes in a parallel connection mode, the other end of the first rear axle oil return pipe is provided with four branch oil return pipes in a parallel connection mode, one branch oil supply pipe and one branch oil return pipe form a pair of branch oil supply pipes and a branch oil return pipe, and each power-assisted alignment control valve block is respectively connected with one pair of branch oil supply pipes and one branch oil return pipe.
The invention relates to an electro-hydraulic steering system with double oil sources, wherein the number of power-assisted alignment control valve blocks is five, five oil supply pipes are arranged at the other end of a first rear axle oil supply pipe in a parallel connection mode, five oil return pipes are arranged at the other end of the first rear axle oil return pipe in a parallel connection mode, one oil supply pipe and one oil return pipe form a pair of oil supply pipes and one oil return pipe, and each power-assisted alignment control valve block is respectively connected with the pair of oil supply pipes and the oil return pipe.
The invention relates to an electro-hydraulic steering system with double oil sources, wherein a front axle loop comprises a first front axle oil supply pipe, a steering gear, a second front axle oil supply pipe, a follower, a second front axle oil return pipe and a first front axle oil return pipe, the front axle oil tank is respectively connected with one ends of the first front axle oil supply pipe and the first front axle oil return pipe, a double-source motor pump is connected onto the first front axle oil supply pipe, the other ends of the first front axle oil supply pipe and the first front axle oil return pipe are respectively connected with the steering gear, and the steering gear is respectively connected with the follower through the second front axle oil supply pipe and the second front axle oil return pipe.
The invention relates to an electro-hydraulic steering system with two oil sources, wherein the number of the double-source motor pumps is two, and the two double-source motor pumps are connected to a first front axle oil supply pipe in a parallel connection mode.
The invention relates to an electro-hydraulic steering system with double oil sources, wherein a second safety valve oil pipe is connected between a first front axle oil supply pipe and a first front axle oil return pipe, and a safety valve is connected on the second safety valve oil pipe.
The invention relates to an electro-hydraulic steering system with double oil sources, which is different from the prior art in that an energy accumulator is connected between a first rear axle oil supply pipe and a first rear axle oil return pipe or a rear axle oil tank, the energy accumulator is connected with a power-assisted alignment control valve block in parallel, when a constant-pressure variable pump stops working due to a high-voltage fault, the energy accumulator can continue working as a backup oil source, the normal working of the steering of a rear axle is ensured, and the whole steering system is safer and more reliable.
The invention will be further explained with reference to the drawings.
Drawings
FIG. 1 is a schematic diagram of an electro-hydraulic steering system having dual oil sources in accordance with the present invention;
fig. 2 is a partially enlarged view of the accumulator and the solenoid directional valve of fig. 1.
Detailed Description
As shown in fig. 1 and fig. 2, the electro-hydraulic steering system with dual oil sources of the present invention includes a front axle oil tank 1 and a rear axle oil tank 11, wherein a front axle loop is connected to the front axle oil tank 1, the rear axle oil tank 11 is respectively connected to one end of a first rear axle oil supply pipe 13 and one end of a first rear axle oil return pipe 19, the first rear axle oil supply pipe 13 is connected to a constant pressure variable pump 12, the other end of the first rear axle oil supply pipe 13 and the other end of the first rear axle oil return pipe 19 are respectively connected to a power alignment control valve block 15, the power alignment control valve block 15 is connected to a power cylinder 16 and an alignment cylinder 17 through hydraulic oil pipes, the first rear axle oil supply pipe 13 is connected to one end of a second rear axle oil supply pipe 25, the other end of the second rear axle oil supply pipe 25 is connected to an electromagnetic directional valve 21, the electromagnetic directional valve 21 is respectively connected to one end of an energy storage oil pipe 24 and one end of a second rear axle oil return pipe 22, the other end of the energy storage oil pipe 24 is connected with the energy accumulator 20, and the other end of the second rear axle oil return pipe 22 is connected with the first rear axle oil return pipe 19 or the rear axle oil tank 11. In the present embodiment, the other end of the second rear axle return pipe 22 is connected to the rear axle tank 11.
The first rear axle oil supply pipe 13, the power-assisted alignment control valve block 15, the hydraulic pipeline, the power-assisted cylinder 16, the alignment cylinder 17, the first rear axle oil return pipe 19, the second rear axle oil supply pipe 25, the electromagnetic directional valve 21, the energy storage oil pipe 24, the energy storage device 20 and the second rear axle oil return pipe 22 form a rear axle loop together.
For the specific structure and the working principle of the power-assisted alignment control valve block 15 in the present invention, please refer to the power-assisted alignment control valve block in the chinese patent with the publication number CN107856732B and the name of "electro-hydraulic steering hydraulic system for multi-mode control", and the structure and the working principle of both are the same.
As shown in fig. 1, the electro-hydraulic steering system having two oil sources of the present invention is provided, in which the constant-pressure variable pumps 12 are provided in two, and the two constant-pressure variable pumps 12 are connected to a first rear axle oil supply pipe 13 in parallel. A first safety valve oil pipe 23 is connected between the first rear axle oil supply pipe 13 and the first rear axle oil return pipe 19, and a safety valve 9 is connected on the first safety valve oil pipe 23.
As shown in fig. 1, the electro-hydraulic steering system with two oil sources according to the present invention includes two or more power-assisted alignment control valve blocks 15, two or more branch oil supply pipes 14 are provided at the other end of the first rear axle oil supply pipe 13 in parallel, two or more branch oil return pipes 18 are provided at the other end of the first rear axle oil return pipe 19 in parallel, the number of the branch oil supply pipes 14 and the number of the branch oil return pipes 18 are the same as that of the power-assisted alignment control valve blocks 15, a pair of branch oil supply pipes 14 and a pair of branch oil return pipes 18 are formed by one branch oil supply pipe 14 and one branch oil return pipe 18, and each power-assisted alignment control valve block 15 is connected to a pair of branch oil supply pipes 14 and a pair of branch oil return pipes 18.
The invention can be suitable for vehicles with different bridge numbers, such as two-bridge vehicles, three-bridge vehicles, four-bridge vehicles, five-bridge vehicles, six-bridge vehicles, seven-bridge vehicles and the like, correspondingly, the number of the power-assisted alignment control valve blocks 15 needs to be changed, and each power-assisted alignment control valve block 15 controls the steering of one bridge.
For a two-axle vehicle, the first axle is a front axle, the second axle is a rear axle, the front axle oil tank 1 and a front axle circuit (i.e. a front axle hydraulic system) are used for controlling the steering of the first axle, and the rear axle oil tank 11 and a rear axle circuit (i.e. a rear axle hydraulic system) are used for controlling the steering of the second axle.
In the case of a specific division of the front axle and the rear axle of the vehicle, there is no rigid regulation, for example, for a five-axle vehicle, one axle and two axles may be divided into a front axle and three to five axles into a rear axle, or one to three axles may be divided into a front axle and four and five axles into a rear axle. Therefore, the working personnel can divide the front axle and the rear axle of the vehicle according to the actual condition, then use the front axle hydraulic system to control the front axle to turn to, use the rear axle hydraulic system to control the rear axle to turn to.
As shown in fig. 1, the two power-assisted alignment control valve blocks 15 are provided, which control the steering of the three-axle and the four-axle respectively, i.e., the case where the present invention is applied to a four-axle vehicle is shown in the figure. Similarly, when the invention is respectively applied to a five-axle vehicle, a six-axle vehicle and a seven-axle vehicle, the number of the power-assisted alignment control valve blocks 15 is respectively three, four and five.
When the invention is applied to a five-axle vehicle, three power-assisted alignment control valve blocks 15 are arranged, three branch oil supply pipes 14 are arranged at the other end of the first rear axle oil supply pipe 13 in a parallel connection mode, three branch oil return pipes 18 are arranged at the other end of the first rear axle oil return pipe 19 in a parallel connection mode, one branch oil supply pipe 14 and one branch oil return pipe 18 form a pair of branch oil supply pipes 14 and one branch oil return pipe 18, the three branch oil supply pipes 14 and the three branch oil return pipes 18 form three pairs of branch oil supply pipes 14 and three branch oil return pipes 18, and each power-assisted alignment control valve block 15 is respectively connected with one pair of branch oil supply pipes 14 and one branch oil return pipe 18.
When the invention is applied to a six-axle vehicle, four power-assisted alignment control valve blocks 15 are arranged, four branch oil supply pipes 14 are arranged at the other end of the first rear axle oil supply pipe 13 in a parallel connection mode, four branch oil return pipes 18 are arranged at the other end of the first rear axle oil return pipe 19 in a parallel connection mode, one branch oil supply pipe 14 and one branch oil return pipe 18 form a pair of branch oil supply pipes 14 and one branch oil return pipe 18, the four branch oil supply pipes 14 and the four branch oil return pipes 18 form four pairs of branch oil supply pipes 14 and four branch oil return pipes 18, and each power-assisted alignment control valve block 15 is respectively connected with one pair of branch oil supply pipes 14 and one branch oil return pipe 18.
When the invention is applied to a seven-axle vehicle, five boosting alignment control valve blocks 15 are arranged, five branch oil supply pipes 14 are arranged at the other end of the first rear axle oil supply pipe 13 in a parallel connection mode, five branch oil return pipes 18 are arranged at the other end of the first rear axle oil return pipe 19 in a parallel connection mode, one branch oil supply pipe 14 and one branch oil return pipe 18 form a pair of branch oil supply pipes 14 and one branch oil return pipe 18, the five branch oil supply pipes 14 and the five branch oil return pipes 18 form five pairs of branch oil supply pipes 14 and branch oil return pipes 18 together, and each boosting alignment control valve block 15 is respectively connected with one pair of branch oil supply pipes 14 and one branch oil return pipe 18.
Of course, the present invention may also be applied to vehicles with other bridge numbers, and the detailed structure thereof is not described herein.
As shown in fig. 1, the electro-hydraulic steering system with two oil sources of the present invention includes a front axle loop including a first front axle oil supply pipe 3, a steering gear 4, a second front axle oil supply pipe 5, a follower 6, a second front axle oil return pipe 7 and a first front axle oil return pipe 8, wherein the front axle oil tank 1 is connected to one end of the first front axle oil supply pipe 3 and one end of the first front axle oil return pipe 8, the first front axle oil supply pipe 3 is connected to a dual-source motor pump 2, the other ends of the first front axle oil supply pipe 3 and the first front axle oil return pipe 8 are connected to the steering gear 4, and the steering gear 4 is connected to the follower 6 through the second front axle oil supply pipe 5 and the second front axle oil return pipe 7.
As shown in fig. 1, the electro-hydraulic steering system with two oil sources of the present invention is provided, wherein two double-source motor pumps 2 are provided, and the two double-source motor pumps 2 are connected to a first front axle oil supply pipe 3 in parallel. And a second safety valve oil pipe 10 is connected between the first front axle oil supply pipe 3 and the first front axle oil return pipe 8, and a safety valve 9 is connected on the second safety valve oil pipe 10.
The front axle loop and the front axle oil tank 1 jointly form a front axle hydraulic system, and the rear axle loop and the rear axle oil tank 11 jointly form a rear axle hydraulic system, namely the electro-hydraulic steering system with the double oil sources comprises the front axle hydraulic system and the rear axle hydraulic system which are mutually independent.
As shown in fig. 1 and fig. 2, in the present invention, an energy accumulator 20 is connected between the first rear axle oil supply pipe 13 and the first rear axle oil return pipe 19 or the rear axle oil tank 11, the energy accumulator 20 is connected in parallel with the power-assisted alignment control valve block 15, when the constant pressure variable displacement pump 12 stops working due to a high voltage fault, the energy accumulator 20 can continue working as a backup oil source, thereby ensuring the normal operation of the rear axle steering, and making the whole steering system safer and more reliable.
As shown in fig. 1 and fig. 2, the invention includes two independent hydraulic systems of the front axle and the rear axle, respectively designing the front axle oil source and the rear axle oil source, the front axle adopts a dual-motor pump redundancy backup design, the motor pump adopts a dual-source motor pump 2 with a high-voltage dual-drive module and a low-voltage dual-drive module, and after the high-voltage electricity is cut off, the dual-source motor pump 2 can still work by using the low-voltage power supply of the whole vehicle, thereby ensuring the steering power of the front axle; meanwhile, the rear axle also adopts a double constant-pressure variable pump source redundancy design, and the energy accumulator 20 is connected in parallel in a hydraulic system of the rear axle, so that when the constant-pressure variable pump 12 stops working due to a high-voltage fault, the energy accumulator 20 can continue working as a backup oil source, and the rear axle is ensured to turn to normal work. The vehicle still has steering power after high-voltage electricity is cut off or a single pump fails in the running process, and the running safety and reliability of the vehicle are effectively improved.
The front axle and the rear axle are designed in a dual-oil-source redundancy mode, safety design is carried out on the high-voltage power-off working condition of the whole vehicle, and the front axle and the rear axle are suitable for models with high requirements on reliability and safety.
Referring to fig. 1 and fig. 2, the following description will explain the present invention in detail by taking the example of the application of the present invention to a four-axle vehicle.
The front axle hydraulic system and the rear axle hydraulic system are mutually independent, and the front axle hydraulic system comprises a front axle oil tank 1, a double-source motor pump 2, a safety valve 9, a steering gear 4, a follower 6 and hydraulic pipelines for connecting the components. The rear axle hydraulic system comprises a rear axle oil tank 11, a constant-pressure variable pump 12, a safety valve 9, an energy accumulator 20, an electromagnetic directional valve 21, a power-assisted alignment control valve block 15, a power-assisted cylinder 16, an alignment cylinder 17 and a hydraulic pipeline for connecting the components. When the steering angle acquisition device works, the front axle steering angle is directly controlled by the steering wheel, an independent structure is formed between the front axle and the rear axle, the front axle steering angle is acquired in real time through the steering angle sensor, and the rear axle turns along with the front axle according to a front axle angle signal.
The first axle and the second axle are divided into front axles, the third axle and the fourth axle are divided into rear axles, a front axle hydraulic system is used for controlling the steering of the front axles, and a rear axle hydraulic system is used for controlling the steering of the rear axles. In the rear axle hydraulic system, two power-assisted alignment control valve blocks 15 are provided, and the two power-assisted alignment control valve blocks 15 are respectively used for controlling the steering of the three axle and the four axle.
The front axle pump source adopts two double-source motor pumps 2 to supply oil to a front axle hydraulic system, the double pumps are mutually redundant and backup, the double pumps work simultaneously during normal running, and after any pump fails, the other pump still meets the system requirement; meanwhile, the motor pump is in a double-source working mode, namely the motor is provided with two sets of windings of high voltage and low voltage, the high voltage winding works in a normal mode, the motor pump works by means of high voltage power supply, and the low voltage winding does not work. A control strategy is set through a motor driver, and when the rotating speed of the motor pump is not zero, if the high-voltage power supply failure is detected, the low-voltage winding module is immediately activated, so that the motor pump continues to work by means of low-voltage electricity of the whole vehicle, and the steering power of a front axle is ensured. The invention adopts the redundant double-source motor pump 2 to supply oil to the front axle, thereby not only solving the hidden danger of steering failure of the system when a single pump fails, but also ensuring that the front axle can still realize the emergency steering function by low voltage after the whole vehicle is powered off at high voltage, and greatly improving the safety of the front axle steering system.
The rear axle adopts a constant-pressure variable pump 12 as a main oil source, a power cylinder 16 and a centering cylinder 17 are controlled to work respectively through a power alignment control valve block 15, when the system works in a centering mode, the high-pressure small flow output of the constant-pressure variable pump 12 aligns the rear axle, and the vehicle is kept to run linearly; when the system works in a steering mode, the constant-pressure variable pump 12 outputs large flow, and the rear axle realizes steering. The invention realizes redundancy backup by arranging two constant-pressure variable pumps 12, so that the rear axle can still turn after a single pump fails. Meanwhile, an energy accumulator 20 is connected in parallel in a rear axle loop, the electromagnetic directional valve 21 with a valve core position capable of being maintained is used for controlling the connection and disconnection between the energy accumulator 20 and a rear axle hydraulic system, and after the whole vehicle is powered off at high voltage, the rear axle realizes emergency steering by means of high-pressure oil stored in the energy accumulator 20.
The electromagnetic directional valve 21 connected with the accumulator 20 has a valve core position maintaining function, the valve core direction change only depends on the electromagnet to be electrified, and the valve core is still maintained at the position when the electromagnet is electrified after the electromagnet is electrified until the electromagnet at the other end is electrified. The specific control strategy is as follows: when the low voltage on the whole vehicle is electrified, DYA1 is electrified, so that the energy accumulator 20 is isolated from a rear axle hydraulic system, the constant-pressure variable pump 12 works after the high voltage on the whole vehicle is electrified, and meanwhile, DYA2 is electrified, so that the energy accumulator 20 is connected with the pump, and the energy accumulator 20 is always filled with high-pressure oil; when the whole vehicle is powered off at high voltage, the DYA2 is powered off, the DYA1 is powered on again, and the energy accumulator 20 is isolated from a rear axle hydraulic system. When the vehicle is normally started, the sequence of low voltage firstly and then high voltage is followed, and when the vehicle is normally powered off, the sequence is opposite, so that the angle of the wheel can be kept by cutting off the energy accumulator 20 even if the vehicle is stopped at a certain corner, and the parking safety is ensured. During the running process of the vehicle, if the high-voltage electricity of the whole vehicle suddenly fails, the constant-voltage variable pump 12 loses power, whether the electromagnet is switched is determined by judging the vehicle speed, if the vehicle speed is more than 5km/h, the DYA2 is kept powered on, the energy accumulator 20 is always connected with a rear axle hydraulic system, emergency steering is realized by means of the high-voltage oil pressure in the energy accumulator 20, and when the vehicle speed is less than 5km/h, the DYA2 is powered off, the DYA1 is powered on, and the energy accumulator 20 is cut off from the rear axle hydraulic system.
According to the invention, the redundant double-source motor pump 2 is arranged on the front axle, the rear axle constant-pressure variable pump 12 and the energy accumulator 20 are mutually backed up, and a corresponding safety control strategy is formulated, so that the front axle and the rear axle can be subjected to emergency steering under the working condition of single pump failure or high-voltage power failure, and the reliability and the safety of a steering system are effectively improved.
The invention has the following technical characteristics:
1) the front axle adopts the double-source motor pump 2 with high-voltage and low-voltage double-drive modules, and after the high-voltage power is cut off, the double-source motor pump 2 can still work by using the low-voltage power supply of the whole vehicle, so that the steering power of the front axle is ensured.
2) The rear axle adopts the design scheme that the constant-pressure variable oil source is connected with the energy accumulator 20 in parallel, so that the rear axle still has steering power after the high-voltage power failure of the whole vehicle is ensured, and the safety of a steering system of the rear axle is improved.
3) The front axle double-source motor pump 2 and the rear axle constant-pressure variable motor pump are designed to be double pumps, redundancy is provided for each other, and after a single pump fails, the steering system can still work normally, so that the reliability of the system is further improved.
4) The rear axle uses the position-keeping electromagnetic directional valve 21 to control the on-off of the energy accumulator 20 and the system, so that the energy accumulator 20 can be normally connected to the system when high voltage fails, and the energy accumulator 20 does not influence the work of a steering system when the vehicle is normally powered off.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. An electro-hydraulic steering system with two oil sources is characterized in that: comprises a front axle oil tank and a rear axle oil tank, wherein the front axle oil tank is connected with a front axle loop, the rear axle oil tank is respectively connected with one end of a first rear axle oil supply pipe and one end of a first rear axle oil return pipe, the first rear axle oil supply pipe is connected with a constant-pressure variable pump, the other ends of the first rear axle oil supply pipe and the first rear axle oil return pipe are respectively connected with a power-assisted alignment control valve block, the power-assisted alignment control valve block is connected with the power-assisted cylinder and the alignment cylinder through a hydraulic oil pipe, the first rear axle oil supply pipe is connected with one end of the second rear axle oil supply pipe, the other end of the second rear axle oil supply pipe is connected with an electromagnetic directional valve which is respectively connected with one end of an energy storage oil pipe and one end of a second rear axle oil return pipe, the other end of the energy storage oil pipe is connected with an energy accumulator, and the other end of the second rear axle oil return pipe is connected with the first rear axle oil return pipe or the rear axle oil tank.
2. The electro-hydraulic steering system with dual oil sources of claim 1, wherein: the constant-pressure variable pumps are connected to the first rear axle oil supply pipe in parallel.
3. The electro-hydraulic steering system with dual oil sources of claim 2, wherein: and a first safety valve oil pipe is connected between the first rear axle oil supply pipe and the first rear axle oil return pipe, and a safety valve is connected on the first safety valve oil pipe.
4. The electro-hydraulic steering system with dual oil sources of claim 3, wherein: the power-assisted alignment control valve block is set to be two or more, the other end of the first rear axle oil supply pipe is provided with two or more branch oil supply pipes in a parallel mode, the other end of the first rear axle oil return pipe is provided with two or more branch oil return pipes in a parallel mode, the branch oil supply pipes and the branch oil return pipes are the same as the power-assisted alignment control valve block in quantity, one branch oil supply pipe and one branch oil return pipe form a pair of branch oil supply pipe and a branch oil return pipe, and each power-assisted alignment control valve block is respectively connected with a pair of branch oil supply pipe and a branch oil return pipe.
5. The electro-hydraulic steering system with dual oil sources of claim 4, wherein: the power-assisted alignment control valve block is three, the other end of the first rear axle oil supply pipe is provided with three oil supply pipes in a parallel connection mode, the other end of the first rear axle oil return pipe is provided with three oil return pipes in a parallel connection mode, one oil supply pipe and one oil return pipe form a pair of oil supply pipe and an oil return pipe, and each power-assisted alignment control valve block is respectively connected with the pair of oil supply pipes and the pair of oil return pipes.
6. The electro-hydraulic steering system with dual oil sources of claim 4, wherein: the power-assisted alignment control valve block is four, the other end of the first rear axle oil supply pipe is provided with four oil supply pipes in a parallel connection mode, the other end of the first rear axle oil return pipe is provided with four oil return pipes in a parallel connection mode, one oil supply pipe and one oil return pipe form a pair of oil supply pipe and an oil return pipe, and each power-assisted alignment control valve block is respectively connected with the pair of oil supply pipe and the pair of oil return pipe.
7. The electro-hydraulic steering system with dual oil sources of claim 4, wherein: the power-assisted alignment control valve block is five, five oil supply pipes are arranged at the other end of the first rear axle oil supply pipe in a parallel connection mode, five oil return pipes are arranged at the other end of the first rear axle oil return pipe in a parallel connection mode, one oil supply pipe and one oil return pipe form a pair of oil supply pipe and one oil return pipe, and each power-assisted alignment control valve block is respectively connected with the pair of oil supply pipe and the pair of oil return pipe.
8. The electro-hydraulic steering system with dual oil sources of any of claims 1-7, wherein: the front axle return circuit includes that first front axle supplies oil pipe, steering gear, second front axle supplies oil pipe, follower, second front axle returns oil pipe and first front axle and returns oil pipe, the front axle oil tank is connected with the one end that first front axle supplied oil pipe and first front axle to return oil pipe respectively, be connected with two source motor pumps on the first front axle supplies oil pipe, the other end that first front axle supplied oil pipe and first front axle to return oil pipe is connected with the steering gear respectively, the steering gear is supplied oil pipe and second front axle to return oil pipe through the second front axle respectively and is connected with the follower.
9. The electro-hydraulic steering system with dual oil sources of claim 8, wherein: the two double-source motor pumps are connected to the first front axle oil supply pipe in a parallel mode.
10. The electro-hydraulic steering system with dual oil sources of claim 9, wherein: and a second safety valve oil pipe is connected between the first front axle oil supply pipe and the first front axle oil return pipe, and a safety valve is connected on the second safety valve oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011135937.1A CN112208631A (en) | 2020-10-22 | 2020-10-22 | Electro-hydraulic steering system with double oil sources |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011135937.1A CN112208631A (en) | 2020-10-22 | 2020-10-22 | Electro-hydraulic steering system with double oil sources |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112208631A true CN112208631A (en) | 2021-01-12 |
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| CN202011135937.1A Pending CN112208631A (en) | 2020-10-22 | 2020-10-22 | Electro-hydraulic steering system with double oil sources |
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| CN115257918A (en) * | 2022-09-06 | 2022-11-01 | 一汽解放汽车有限公司 | Electronic hydraulic power steering system, vehicle and control method |
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Application publication date: 20210112 |