CN112173088A - Combined pressure accumulator with flow rate control function and hydraulic brake system - Google Patents
Combined pressure accumulator with flow rate control function and hydraulic brake system Download PDFInfo
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- CN112173088A CN112173088A CN202011028615.7A CN202011028615A CN112173088A CN 112173088 A CN112173088 A CN 112173088A CN 202011028615 A CN202011028615 A CN 202011028615A CN 112173088 A CN112173088 A CN 112173088A
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 20
- 239000003921 oil Substances 0.000 claims abstract description 15
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 239000013589 supplement Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 9
- 230000001502 supplementing effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 9
- RZVHIXYEVGDQDX-UHFFFAOYSA-N 9,10-anthraquinone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 RZVHIXYEVGDQDX-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/42—Arrangement or adaptation of brakes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
- B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
- B60T13/141—Systems with distributor valve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Aviation & Aerospace Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention belongs to the technical field of helicopter hydraulic systems, and discloses a combined accumulator and a hydraulic brake system with flow rate control. The hydraulic control system can be applied to a helicopter hydraulic system with pressure maintaining requirements, the pressure accumulator integrated design with flow rate self-control is adopted for the first time, the impact on the pressure accumulator caused by overhigh flow rate during pressurizing or pressure supplementing is avoided, and the operation stability of a rear end execution mechanism during pressurizing is improved. The flow limiting valve and the flow limiting stop valve are arranged on the pressure supply pipeline between the pump source and the brake pressure accumulator in a matched mode, so that the flow using requirement of the brake system serving as a load end is met, the pressure supply pipeline is cut off in time after hydraulic leakage of the pressure supply oil circuit is caused by breakage, damage and the like of the pipeline or equipment in the process, the normal work of the main hydraulic system is prevented from being influenced due to continuous leakage of hydraulic oil, and the safety of the main hydraulic system adopting the power type brake hydraulic system is improved.
Description
Technical Field
The invention belongs to the technical field of helicopter hydraulic systems, and particularly relates to a combined accumulator with flow rate control and a hydraulic brake system.
Background
When the pressure of the pressure accumulator on the existing helicopter is insufficient and needs to be pressurized, the pressurizing system is not provided with a pressurizing flow rate control device to protect the pressure accumulator, or only a speed regulating valve is arranged in a pipeline, so that not only is the overall spatial arrangement and weight seriously examined, but also the system is additionally provided with connecting points, so that possible leakage points are increased, and the safety of the system is reduced.
Helicopter wheel brake hydraulic system, rotor brake hydraulic system conventional classification are two kinds active power formula and passive closed, consider based on man-machine work efficiency, often adopt the power formula more. In view of the weight cost, in the helicopter adopting the dynamic brake hydraulic system, the brake hydraulic system is mostly crosslinked with the main hydraulic system, the power source is from the main system, namely the main system not only completes the hydraulic pressure supply of the flight control system, but also provides the pressure source for the brake hydraulic system, and the brake hydraulic system is provided with the pressure accumulator for providing pressure guarantee during the braking pressure maintaining. When the existing helicopter main hydraulic system supplies pressure to a brake hydraulic system, the main hydraulic system directly supplies pressure to a brake pressure accumulator through a pipeline or directly supplies pressure to a brake device through a shunt pressure reducing device, compared with a fixed wing aircraft, the space of the helicopter is limited, when the active power brake hydraulic system is used, the main hydraulic system can only be arranged far away from the brake pressure accumulator and the brake device, the main hydraulic system is connected through a plurality of sections of pipelines, the changes of different dimensions from top to bottom from front to back and the like are large, the working conditions of the plurality of sections of pipelines and different working zones are changed greatly, the possibility of pipeline leakage caused by superposition of various factors is greatly increased, the hydraulic source is decompressed, hydraulic oil leakage is caused, and the dynamic brake hydraulic system is often cross-linked with a main system, the safety of the main hydraulic system is greatly reduced, and the main hydraulic system can not supply pressure to a flight control system in serious cases, thereby compromising flight safety.
Disclosure of Invention
The purpose of the invention is as follows: on one hand, the combined accumulator with flow rate control is provided, and the hydraulic system accessory can be used for storing hydraulic energy of a helicopter brake system and providing sufficient pressure and flow for the brake hydraulic system; and monitoring and transmitting the hydraulic pressure value in the accumulator liquid cavity in the combined accumulator in real time, and sending a low-pressure switch signal when the pressure value in the accumulator liquid cavity is lower than a set value.
On the other hand, the high-safety dynamic brake hydraulic system can avoid the leakage of oil of the main hydraulic system when a hydraulic source pressure supply pipeline leaks, and the influence on the pressure supply of the main hydraulic system to the flight control system is avoided.
The technical scheme of the invention is as follows:
the first technical scheme is as follows:
a combined accumulator with flow rate control, comprising: the pressure accumulator, the flow rate control valve, the one-way valve and the pressure supply interface;
the flow rate control valve and the check valve are integrated inside the accumulator;
one end of the flow rate control valve is connected with the high-pressure cavity of the pressure accumulator, and the other end of the flow rate control valve is connected with the outlet of the one-way valve; the flow rate control valve is used for limiting the charging flow rate of the accumulator high-pressure cavity;
the inlet of the one-way valve is connected with the output end of the pressure supply interface, and the pressure supply interface is connected with an external hydraulic oil source.
Further, the combined accumulator further comprises: a pressure annunciator and a three-way joint; the first connector of the three-way connector is connected with the output end of the high-pressure cavity of the pressure accumulator, and the second connector of the three-way connector is connected with the pressure annunciator; the third joint of the three-way joint is used for outputting high-pressure hydraulic oil; the pressure annunciator is used for monitoring the hydraulic pressure in the high-pressure cavity of the pressure accumulator and feeding the hydraulic pressure in the high-pressure cavity back to the electromechanical system for display of the cockpit.
Further, the signal output end of the pressure annunciator is also connected with a pump source control system; the pressure annunciator is also used for sending an enabling signal to the pump source control system to start the pump source control system to supplement pressure for the pressure accumulator when the hydraulic pressure in the high-pressure cavity is lower than a set threshold value.
Further, the combined accumulator further comprises a sealing ring, and the sealing ring is sleeved at the joint of the pressure supply interface and the accumulator shell.
Further, the combined accumulator further comprises: a compression nut; the compression nut is arranged at the joint of the first connector of the three-way connector and the output end of the high-pressure cavity of the pressure accumulator; and the compression nut is used for improving the connection reliability of the first connector of the three-way connector and the output end of the high-pressure cavity of the pressure accumulator.
The second technical scheme is as follows:
a hydraulic braking system applies the combined pressure accumulator with flow rate control, and the high-pressure hydraulic oil output end of the combined pressure accumulator is connected with a hydraulic distribution valve of the braking system and used for supplying pressure to the braking system; the pressure supply interface of the combined accumulator is connected with a hydraulic pump source.
Further, the hydraulic brake system further includes: one end of the flow-limiting cut-off valve is connected with a hydraulic pump source, and the other end of the flow-limiting cut-off valve is connected with the combined accumulator through a pipeline; the flow-limiting cut-off valve is used for closing the flow-limiting cut-off valve to close the oil way when the hydraulic flow passing through the flow-limiting cut-off valve exceeds Q2.
Further, Q1< Q2.
Further, the output hydraulic flow of the hydraulic pump source is Q3; the cut-off flow Q2 of the flow-limiting cut-off valve is smaller than the output flow Q3 of the hydraulic pump source.
Further, the output hydraulic flow of the hydraulic pump source is Q3; q1< Q2< Q3.
The invention has the beneficial technical effects that: the combined accumulator with flow rate control provided by the invention can be applied to a helicopter hydraulic system with pressure maintaining requirements, and the accumulator integrated design with flow rate self-control is adopted for the first time, so that the impact of overhigh flow rate on the accumulator during pressure charging or pressure supplementing is avoided, and the running stability of a rear-end execution mechanism during pressure charging is improved. The combined accumulator fully carries out the design of the external field replaceable unit, and comprises a pressure gauge, an inflation connector, a speed control valve, a pressure annunciator and the like, so that the external field is replaceable, and the external field fault is quickly positioned and eliminated. This combination formula accumulator adopts the integral type design of integrating, and integrated design has the check valve for the pressurize simultaneously, has realized the very big optimization of weight and space occupation size. The invention can be used for helicopter hydraulic systems, can optimize the configuration of an airplane hydraulic system with pressure maintaining requirements, and provides the advantages of reliability, maintainability and weight of the hydraulic system.
The high-safety dynamic brake hydraulic system provided by the invention can be used for the design of helicopter dynamic brake systems or tail wheel locking systems and the like. The flow limiting valve and the flow limiting stop valve are arranged on the pressure supply pipeline between the pump source and the brake pressure accumulator in a matched mode, so that the flow using requirement of the brake system serving as a load end is met, the pressure supply pipeline is cut off in time after hydraulic leakage of the pressure supply oil circuit is caused by breakage, damage and the like of the pipeline or equipment in the process, the normal work of the main hydraulic system is prevented from being influenced due to continuous leakage of hydraulic oil, and the safety of the main hydraulic system adopting the power type brake hydraulic system is improved.
The one-way valve, the flow limiting valve, the pressure accumulator, the pressure sensor and the like can be integrated, the flow limiting cut-off valve can also be integrated with an original combined valve on a machine, the total weight of the system can be kept unchanged although elements are added to a conventional system, the aims of not increasing the weight and improving the safety are fulfilled, and the design of a high-safety dynamic brake hydraulic system is achieved.
Drawings
FIG. 1 is a schematic view of a combined accumulator;
FIG. 2 is a view of a combined accumulator structure;
FIG. 3 is a schematic diagram of a hydraulic braking system;
description of numbering: 1. the pressure measuring device comprises a pressure accumulator, a pressure annunciator, a compression nut, a sealing ring, a tee joint, a plastic gasket, a flow rate control valve, a spring, a sealing ring, a check valve, a pipe connecting nozzle, a gas charging joint, a gas pressure meter and a pressure measuring device, wherein the pressure accumulator comprises 2 parts of a pressure annunciator, 3 parts of a compression nut, 4 parts of a sealing ring, 5 parts of a tee joint, 6 parts of a plastic gasket;
21. the hydraulic oil tank, 22, a hydraulic electric pump, 23, a one-way valve, 24, an oil filter, 25, a flow-limiting stop valve, 26, a combined accumulator and 27, and a hydraulic distribution valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The principle of a combined accumulator with flow rate control is shown in figure 1.
A combined accumulator with flow rate control can be used for a helicopter brake system to store hydraulic energy and provide sufficient pressure and flow for the brake hydraulic system; and monitoring and transmitting the hydraulic pressure value in the accumulator liquid cavity in the combined accumulator in real time, and sending a low-pressure switch signal when the pressure value in the accumulator liquid cavity is lower than a set value.
A combined pressure accumulator with flow rate control is composed of a pressure accumulator 1, a pressure annunciator 2, a compression nut 3, a sealing ring 4, a three-way joint 5, a plastic gasket 6, a flow rate control valve 7, a spring 8, a sealing ring 9, a one-way valve 10, a filler neck 11, an inflation joint 12 and a barometer 13.
A combined pressure accumulator with flow rate control can be fixed on a machine by 4 bolts with the same specification, the pressure accumulator in the combined valve type pressure accumulator is of a piston type structure, and the pressure accumulator is divided into two independent gas and liquid cavities by a piston; the air accumulator air cavity can be inflated by using a universal inflation tool interface structure of the helicopter, industrial nitrogen with specified pressure is pre-charged in the air accumulator air cavity through an inflation joint 12 arranged on the air accumulator, and the pressure of the instant air cavity is observed through a pressure gauge 13; the one-way valve 10 is connected with a hydraulic input filler neck of the flow rate control valve in a threaded insertion manner, and is connected with a hydraulic cavity end cover of the pressure accumulator in a threaded insertion manner together with the flow rate control valve; the combination valve type pressure accumulator is provided with a pressure signal device 2 for monitoring the pressure of a liquid cavity of the pressure accumulator, and the signal device is connected with the pressure accumulator in a threaded connection mode.
The working principle of a combined pressure accumulator with flow rate control is as follows:
as shown in fig. 2, 21MPa or other predetermined pressure source hydraulic pressure from the helicopter hydraulic system is input to the flow rate control valve through the one-way valve in port P1, output to the accumulator hydraulic chamber through the flow rate control valve, or output to the rear end actuator through port P2 on the accumulator. After the pressurization or pressure compensation is finished, the one-way valve is used for pressure maintaining of the pressure accumulator and isolating a pressurization or pressure compensation system on the machine; meanwhile, the pressure signal device monitors and transmits the hydraulic pressure value in the liquid cavity of the pressure accumulator in real time, and sends a low-pressure switch signal when the pressure in the liquid cavity is lower than a set value, so that the hydraulic system on the trigger machine automatically or manually starts the corresponding hydraulic system to charge or supplement the pressure for the pressure accumulator.
The utility model provides a combined type accumulator that possesses velocity of flow control is for the first time adopts velocity of flow self control's accumulator integrated design, and too high velocity of flow causes impact or influence rear end actuating mechanism even running to the accumulator when having avoided pressurizing or pressure supplementing, and integrated design has the check valve for the pressurize simultaneously.
Example 2
A high-safety power type brake hydraulic system is mainly composed of a hydraulic oil tank 21, a hydraulic electric pump 22, a pump source one-way valve 23, an oil filter 24, a flow-limiting cut-off valve 25, a combined accumulator 26, a hydraulic distribution valve 27, a wheel brake device and pipelines, as shown in figure 3. The hydraulic oil tank 21 is used for storing system hydraulic oil; the hydraulic electric pump 22 is a constant-pressure variable pump, absorbs oil from a hydraulic oil tank, outputs high-pressure hydraulic oil, and has a rated flow rate of Q3; the pump source check valve 23 is used for preventing hydraulic oil from flowing reversely; the oil filter 24 is used for filtering hydraulic oil output by the hydraulic electric pump; the flow-limiting shut-off valve 25 maintains the passage when the flow rate is not greater than a prescribed value Q2, and closes the passage when the flow rate exceeds a prescribed value Q2; the one-way flow limiting valve 6 is used for limiting the charging flow of the accumulator or the flow transmitted to the brake device to be not more than Q1, and the one-way valve reversely closes the pressure of the accumulator; the combined accumulator 26 stores hydraulic oil for brake pressure maintaining when the brake is stopped; the pressure sensor 8 is used for indicating the hydraulic pressure in the accumulator and outputting display; the hydraulic distribution valve 27 is used for distributing hydraulic pressure and transmitting the hydraulic pressure to the two wheel braking devices; the wheel brake device 10 receives hydraulic pressure to realize a braking action.
The invention relates to a high-safety power type brake hydraulic system.A flow limiting cut-off valve 25 keeps a passage when the flow is not more than a specified value Q2, the passage is closed when the flow exceeds a specified value Q2, and when the rated flow of a hydraulic electric pump is Q3, the condition that the delta Q is Q3-Q2 can meet the emergency operation function of a main system is ensured. When the brake device realizes a braking function or supplements pressure for the combined accumulator 26, the one-way flow limiting valve 6 is required to be arranged for limiting the charging flow not to be more than Q1, otherwise when the hydraulic electric pump is started to supply pressure for a brake system, the rated flow of the electric pump is Q3 which is larger than the cutoff flow Q2 set by the flow limiting cutoff valve, the passage of the flow limiting cutoff valve 25 can be immediately cut off, and the braking or accumulator pressure supplementing operation can not be realized; when the brake device realizes the brake function or supplements pressure for the combined accumulator 26, the required flow is small, namely the use requirement can be met, namely the flow limited by the one-way flow limiting valve is not more than Q1, the Q1 can meet the requirement of the minimum flow when the brake device realizes the brake function or supplements pressure for the combined accumulator 26, and the cut-off flow Q2 is required to be smaller than the flow limiting cut-off valve.
The flow-limiting stop valve and the one-way flow-limiting valve are required to be arranged at the same time, and the flow-limiting flow of the one-way flow-limiting valve is not more than the cut-off flow of the flow-limiting stop valve and is arranged on the basis of meeting the minimum pressurizing flow.
When a machine wheel brake device needs hydraulic pressure supply, in order to ensure that the hydraulic pressure in the pressure accumulator can be quickly released to the machine wheel brake device, the brake effect is achieved, the oil leakage of a pressure supply oil way is monitored in the maximum range, and the one-way flow limiting valve must be arranged at the front end of the pressure accumulator in the oil way and is close to the pressure accumulator as far as possible.
In order to monitor the oil leakage of the pressure supply oil path in the maximum range, the flow-limiting cut-off valve is close to the source end of the pump as far as possible, and the hydraulic electric pump is used as the pump source in the invention.
Normal operating condition, current-limiting trip valve passageway: when the brake operation or the pressure supplement of the pressure accumulator is needed, the hydraulic emergency pump is started, the flow of the hydraulic electric pump to the brake hydraulic system is controlled to be below Q1 under the control of the flow limiting flow Q1 of the one-way flow limiting valve, the output flow is lower than the flow Q2 of the flow limiting stop valve at the moment, the stop valve keeps a passage state, hydraulic oil is output by the hydraulic electric pump and flows through the flow limiting stop valve, the one-way flow limiting valve and other elements to realize the normal pressure supply for the brake system.
When the pipeline or equipment between the flow-limiting cut-off valve and the one-way flow-limiting valve is broken or damaged to cause the hydraulic leakage of the pressure supply oil way: because the rear end of the flow-limiting cut-off valve loses the constraint control of the flow-limiting flow Q1 of the one-way flow-limiting valve, after the hydraulic electric pump works, the flow of the liquid flowing through the flow-limiting cut-off valve can quickly reach the cut-off flow, once the cut-off flow is reached, the flow-limiting cut-off valve is immediately closed, the phenomenon that the normal work of a main hydraulic system is influenced due to the fact that hydraulic oil continuously leaks is avoided, and the high safety of the power type brake hydraulic system is achieved through.
The foregoing is merely a detailed description of the embodiments of the present invention, and some of the conventional techniques are not detailed. The scope of the present invention is not limited thereto, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A combined accumulator with flow rate control, characterized in that: the combined accumulator comprises: the pressure accumulator, the flow rate control valve, the one-way valve and the pressure supply interface;
the flow rate control valve and the check valve are integrated inside the accumulator;
one end of the flow rate control valve is connected with the high-pressure cavity of the pressure accumulator, and the other end of the flow rate control valve is connected with the outlet of the one-way valve; the flow rate control valve is used for limiting the charging flow of the accumulator high-pressure cavity to be Q1;
the inlet of the one-way valve is connected with the output end of the pressure supply interface, and the pressure supply interface is connected with an external hydraulic oil source.
2. A combined accumulator with flow rate control as set forth in claim 1, wherein: the combined accumulator further comprises: a pressure annunciator and a three-way joint; the first connector of the three-way connector is connected with the output end of the high-pressure cavity of the pressure accumulator, and the second connector of the three-way connector is connected with the pressure annunciator; the third joint of the three-way joint is used for outputting high-pressure hydraulic oil; the pressure annunciator is used for monitoring the hydraulic pressure in the high-pressure cavity of the pressure accumulator and feeding the hydraulic pressure in the high-pressure cavity back to the electromechanical system for display of the cockpit.
3. A combined accumulator with flow rate control as set forth in claim 2, wherein: the signal output end of the pressure annunciator is also connected with a pump source control system; the pressure annunciator is also used for sending an enabling signal to the pump source control system to start the pump source control system to supplement pressure for the pressure accumulator when the hydraulic pressure in the high-pressure cavity is lower than a set threshold value.
4. A combined accumulator with flow rate control as set forth in claim 1, wherein: the combined accumulator further comprises a sealing ring, and the sealing ring is sleeved at the joint of the pressure supply interface and the accumulator shell.
5. A combined accumulator with flow rate control as set forth in claim 2, wherein: the combined accumulator further comprises: a compression nut; the compression nut is arranged at the joint of the first connector of the three-way connector and the output end of the high-pressure cavity of the pressure accumulator; and the compression nut is used for improving the connection reliability of the first connector of the three-way connector and the output end of the high-pressure cavity of the pressure accumulator.
6. A hydraulic brake system using a combined accumulator with flow rate control according to claims 1-5, characterized in that: the high-pressure hydraulic oil output end of the combined accumulator is connected with a hydraulic distribution valve of the braking system and used for supplying pressure to the braking system; the pressure supply interface of the combined accumulator is connected with a hydraulic pump source.
7. The hydraulic brake system of claim 6, wherein: the hydraulic brake system further includes: one end of the flow-limiting cut-off valve is connected with a hydraulic pump source, and the other end of the flow-limiting cut-off valve is connected with the combined accumulator through a pipeline; the flow-limiting cut-off valve is used for closing the flow-limiting cut-off valve to cut off the oil way when the hydraulic flow passing through the flow-limiting cut-off valve exceeds Q2, Q2 is used for cutting off the flow of the flow-limiting cut-off valve, and Q1 is less than Q2.
8. The hydraulic brake system of claim 7, wherein: the output hydraulic flow of the hydraulic pump source is Q3; and Q1< Q2< Q3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011028615.7A CN112173088A (en) | 2020-09-25 | 2020-09-25 | Combined pressure accumulator with flow rate control function and hydraulic brake system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011028615.7A CN112173088A (en) | 2020-09-25 | 2020-09-25 | Combined pressure accumulator with flow rate control function and hydraulic brake system |
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| CN112173088A true CN112173088A (en) | 2021-01-05 |
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| CN202011028615.7A Pending CN112173088A (en) | 2020-09-25 | 2020-09-25 | Combined pressure accumulator with flow rate control function and hydraulic brake system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113799975A (en) * | 2021-08-18 | 2021-12-17 | 西安航空制动科技有限公司 | Aircraft brake controller based on FPGA |
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