CN114771489A - Brake hydraulic pipeline, brake hydraulic system and vehicle - Google Patents
Brake hydraulic pipeline, brake hydraulic system and vehicle Download PDFInfo
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- CN114771489A CN114771489A CN202210351719.4A CN202210351719A CN114771489A CN 114771489 A CN114771489 A CN 114771489A CN 202210351719 A CN202210351719 A CN 202210351719A CN 114771489 A CN114771489 A CN 114771489A
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- noise reduction
- brake
- flow channel
- bushing
- noise
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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
- B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses
- B60T17/043—Brake line couplings, air hoses and stopcocks
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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
- B60T13/16—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 pumps directly, i.e. without interposition of accumulators or reservoirs
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a brake hydraulic pipeline, a brake hydraulic system and a vehicle, comprising: the brake device comprises a brake hard pipe, a connecting piece, a brake hose and a first noise reduction strip, wherein a first flow channel is formed in the brake hard pipe; one end of the connecting piece is connected with the braking hard tube, and a second flow passage communicated with the first flow passage is formed in the connecting piece; one end of the brake hose is connected with the other end of the connecting piece, and a third flow channel is formed in the brake hose; the first noise reduction strip is positioned in the brake hose, a first noise reduction flow channel is formed in the first noise reduction strip, and two ends of the first noise reduction flow channel are communicated with the second flow channel and the third flow channel respectively. According to the brake hydraulic pipeline disclosed by the embodiment of the invention, the composite noise reduction pipeline manufactured in the pipeline assembly is used for reducing some pump source pulsation and reducing the transmission of mechanical vibration frequency noise in the lower end pipeline and the hydraulic booster by utilizing the flexibility characteristic of the brake hose and the expansion chamber noise reduction principle of the first noise reduction strip.
Description
Technical Field
The invention relates to the field of vehicles, in particular to a brake hydraulic pipeline, a brake hydraulic system and a vehicle.
Background
The energy of the existing vehicle type hydraulic power assisting device comes from a steering pump, the steering pump is a vane pump, mechanical friction, vibration noise and fluid pulsation noise are generated when the steering pump works and rotates, and part of the noise is directly transmitted to the air through a shell; one part of the water is output to the pipeline through the fluid carrier according to certain fluid pulsation frequency and pressure pulsation through the output port and then is transmitted to the air.
Noise propagating to the surroundings through the hydraulic line: a. transmitting a certain amount of steering pump source mechanical and fluid pulsation noise; b. when the pulsating fluid passes through the pipeline, the pipeline vibrates and resonates to generate noise; c. the forward noise waves are blocked from complex wave noise generated by reflection. Because the pipeline of the hydraulic power-assisted braking device is arranged in a cab, when the system builds pressure, the whole pipeline has great noise, and the discomfort of a driver is caused.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, it is an object of the invention to provide a brake hydraulic circuit which enables a better suppression of the noise of the hydraulic booster and a better noise reduction of the circuit system.
The brake hydraulic line according to an embodiment of the present invention includes: the brake hard tube is internally provided with a first flow passage; one end of the connecting piece is connected with the brake hard tube, and a second flow passage communicated with the first flow passage is formed in the connecting piece; one end of the brake hose is connected with the other end of the connecting piece, and a third flow channel is formed in the brake hose; the first noise reduction strip is positioned in the brake hose, a first noise reduction runner is formed in the first noise reduction strip, and two ends of the first noise reduction runner are respectively communicated with the second runner and the third runner.
According to the brake hydraulic pipeline disclosed by the embodiment of the invention, by utilizing the flexibility characteristic of the brake hose and the expansion chamber noise reduction principle of the first noise reduction strip, the composite noise reduction pipeline manufactured in the pipeline assembly reduces some pump source pulsation, reduces the propagation of mechanical vibration frequency noise in the lower end pipeline and the hydraulic booster, and simultaneously reduces the pulsation energy and flow velocity of pulsating fluid, so that when the working pressure of the hydraulic booster is increased, the superposition of pulsation pressure is avoided, the flow velocity of the fluid is ensured to be within an acceptable range, turbulence is not easily generated, and the noise suppression of the hydraulic booster and the noise reduction of a pipeline system are realized.
In addition, the brake hydraulic line according to the present invention may have the following additional features:
in some embodiments of the invention, the brake hydraulic circuit further comprises: the pipeline joint is internally provided with a fourth flow passage and is connected with the other end of the brake hose; and the second noise reduction strip is positioned in the brake hose, a second noise reduction flow channel is formed in the second noise reduction strip, and two ends of the second noise reduction flow channel are respectively communicated with the third flow channel and the fourth flow channel.
In some embodiments of the present invention, the first noise reduction strip and/or the second noise reduction strip are tubular structures, an outlet communicated with the first noise reduction flow channel is formed on a tube wall of the first noise reduction strip, and the outlet extends spirally along a length direction of the first noise reduction strip, and/or an inlet communicated with the second noise reduction flow channel is formed on a tube wall of the second noise reduction strip, and the inlet extends spirally along a length direction of the second noise reduction strip.
In some embodiments of the present invention, at least a portion of the first and/or second noise reduction strips is constructed of an elastomeric material.
In some embodiments of the invention, the connector comprises: the first nut head is used for being in threaded connection with the brake hard pipe; one end of the first middle pipe is fixedly connected with the first nut head; the first lining core is fixedly connected with the other end of the first middle pipe, and the first noise reduction strip is connected with the first lining core; the first bushing is sleeved on the outer side of the first bushing core and connected with the brake hose.
In some embodiments of the invention, the line connection comprises: a second nut head; one end of the second middle pipe is fixedly connected with the second nut head; the second lining core is fixedly connected with the other end of the second middle pipe, and the second noise reduction strip is connected with the second lining core; and the second bushing is sleeved on the outer side of the second bushing core and is connected with the brake hose.
In some embodiments of the invention, the first noise reduction bar is riveted within the first liner and the second noise reduction bar is riveted within the second liner.
In some embodiments of the present invention, the outer circumferential wall of the first lining core is formed with first anti-slip teeth, the inner circumferential wall of the first lining core is formed with second anti-slip teeth, a first slot is configured between the outer circumferential wall of the first lining core and the inner circumferential wall of the first lining core, and the brake hose is plugged into the first slot; and/or, the periphery wall of second lining core is formed with the smooth tooth of third prevention, the internal perisporium of second bush is formed with the smooth tooth of fourth prevention, the periphery wall of second lining core with construct the second slot between the internal perisporium of second bush, the brake hose is pegged graft in the second slot.
In some embodiments of the invention, the length L of the first noise reduction bar, the length L of the second noise reduction bar and the length L of the brake hose satisfy: l > L + L, wherein L > L.
The brake hydraulic system according to the embodiment of the invention includes: the hydraulic brake system comprises a steering pump and the brake hydraulic pipeline, wherein a brake hard pipe of the brake hydraulic pipeline is communicated with the steering pump.
The brake hydraulic system according to the embodiment of the invention includes: the brake hard pipe of the brake hydraulic pipeline is communicated with the steering pump; the brake hydraulic system has various pressure valves, no matter the pressure valve, flow control valve or direction control valve, and its structure is composed of valve body, valve core and spring. The valve core and the spring structure are easy-to-vibrate bodies, and the working process of the valve core and the spring structure is an easy-to-vibrate process; if the design is not reasonable in manufacture and installation, strong vibration noise can be caused by slight external force or displacement interference, or self-excited flutter noise can be generated and even can be applied to other elements and pipelines to cause strong vibration and noise of the whole system. The brake hydraulic system controls the vibration and the flutter noise of the valve core by installing the brake hydraulic pipeline, can reduce the risk of damaging a sealing device, the pipeline and other hydraulic elements, and can also reduce the vibration of the pipeline and the elements, the loosening phenomenon of a valve and a pipe joint and the like. Auxiliary elements such as noise reduction strips are arranged in the hydraulic circuit, so that impact energy can be absorbed, and impact damage is reduced.
The invention also provides a vehicle with the brake hydraulic system.
According to the vehicle provided by the embodiment of the invention, the auxiliary elements such as the noise reduction strips are arranged in the hydraulic circuit of the braking hydraulic system, so that impact energy can be absorbed, and impact damage is reduced.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a brake hydraulic line according to an embodiment of the present invention;
fig. 2 is a sectional view of a brake hydraulic line according to an embodiment of the present invention;
FIG. 3 is one embodiment of a brake hydraulic circuit according to an embodiment of the present invention;
fig. 4 is another embodiment of a brake hydraulic line according to an embodiment of the present invention.
Reference numerals: 100-brake hydraulic line;
1-braking a hard tube; 11-a first flow channel; 2-a connector; -a second flow channel; 22-a first nut head;
23-a first intermediate tube; 24-a first liner core; 25-a first bushing; 3-a brake hose; 31-a third flow channel; 4-a first noise reduction bar; 5-a second noise reduction bar; 6-a pipeline joint; 61-a second nut head; 62-a second intermediate tube; 63-a second liner core; 64-second bushing.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The brake hydraulic line 100 according to the embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the brake hydraulic line 100 according to the embodiment of the present invention includes: the brake device comprises a brake hard pipe 1, a connecting piece 2, a brake hose 3 and a first noise reduction strip 4, wherein a first flow channel 11 is formed in the brake hard pipe 1; the braking mode of the existing vehicle mostly adopts hydraulic braking, because liquid can not be compressed and can transmit power nearly 100%, the basic principle is that a driver steps on a brake pedal to apply pressure to brake oil in a master cylinder, a braking hydraulic system of an automobile comprises the master cylinder, the brake fluid, a branch pump and a hydraulic pipeline, the hydraulic pipeline is filled with the brake fluid (also called as the brake oil) to form a closed pressure transmission system, when the driver steps on the brake pedal, a piston of the master cylinder is pushed to move forwards, the pressure of the brake fluid in the master cylinder is increased, the brake fluid enters the branch pumps of each wheel through the hydraulic pipeline to push the pistons of the branch pumps to expand outwards, the transmission of the force of foot-operated braking to a wheel brake is realized, the wheel brake is pushed to perform braking, when the brake pedal is released, the master cylinder returns under the action of the oil pressure and a spring, and the branch cylinder piston and the wheel brake return, the brake on the wheel is released.
One end of the connecting piece 2 is connected with the brake hard tube 1, and a second flow passage communicated with the first flow passage 11 is formed in the connecting piece 2; one end of the brake hose 3 is connected with the other end of the connecting piece 2, and a third flow channel 31 is formed in the brake hose 3; the first noise reduction strip 4 is positioned in the brake hose 3, a first noise reduction flow channel is formed in the first noise reduction strip 4, and two ends of the first noise reduction flow channel are respectively communicated with the second flow channel and the third flow channel 31.
According to the brake hydraulic pipeline 100 of the embodiment of the present invention, the first flow channel 11, the second flow channel, the third flow channel 31 and the fourth flow channel are sequentially communicated, the first flow channel 11 is connected with the second flow channel through the connector 2, and similarly, the second flow channel is connected with the third flow channel 31 through the connector 2, so that the first flow channel 11, the second flow channel and the third flow channel 31 are communicated, and the brake fluid flows in the brake hydraulic pipeline 100, specifically, the brake fluid sequentially passes through the first flow channel 11, the second flow channel, the third flow channel 31 and the fourth flow channel, and the materials of the hydraulic pipeline are selected from the materials with different elastic moduli by using the principle that the conduction speed of sound waves in the pipelines with different elastic moduli is different, specifically, a part of the brake hydraulic pipeline 100 adopts the brake hard pipe 1 with low elasticity, and a part adopts the brake hose 3 with high elasticity, and the brake hose 3 here can adopt a rubber material or a plastic material, the brake hard tube 1 is connected with the brake hose 3 through the connecting piece 2, so that after brake fluid flows into the brake hose 3 from the brake hard tube 1, the diameter of the brake hose 3 can be increased by the brake fluid, the brake fluid can be buffered in the brake hose 3 early, and the attenuation of noise and wave speed in pipeline transmission is realized.
When the brake pedal is stepped on to brake, the position of a slide valve in the hydraulic booster moves, pressure is built in a pipeline from a steering pump to the hydraulic booster, and during the pressure building process, when generated noise is conducted in a hard pipe and a soft pipe, the conduction characteristics are obviously different due to the difference of the characteristics of the pipes, the conduction speed of a section 3 of the brake hose is smaller than that of a section 1 of the brake hard pipe, namely, in the brake hose 3, tassels of brake fluid are effectively attenuated, and for the sound waves of strong pulsating sound pressure, the section 3 of the brake hose is equivalent to an energy absorption damper, so that the noise is effectively reduced.
When the pump source is exported with the pulsation noise ripples of certain frequency, through 1 high-speed ripples of braking hard tube that is connected with brake hose 3 rush into first falling noise strip 4, first falling noise strip 4 also can make the velocity of flow of brake fluid reduce, even can also make the energy retro-reflection when brake fluid energy attenuation again, thereby can further make the velocity of flow of brake fluid reduce, so, 4 noise abatement through first falling noise strip, simultaneously through first 4 flow rate back of slowing down the brake fluid of falling noise strip, the brake fluid enters into brake hose 3 and can also further be slowed down and flow, noise abatement. Therefore, when the length of the first noise reduction strip 4 and the volume of the expansion chamber are reasonably designed, the noise waves with the frequency cannot pass through, and the purpose of reducing noise is achieved. The first noise reduction bar 4 is equivalent to an accumulator of the brake hydraulic pipeline 100, and can absorb impact energy and reduce impact damage. However, the cost of the hydraulic circuit is inevitably increased by using the first noise reduction strip 4, but the first noise reduction strip 4 is arranged at the junction of the brake hard pipe 1 and the brake hose 3 in the hydraulic pipeline, so that the hydraulic loss can be reduced, the hydraulic impact in the braking process of the hydraulic cylinder can be reduced, and the impact noise can be reduced.
According to the brake hydraulic pipeline 100 disclosed by the embodiment of the invention, by utilizing the flexibility characteristic of the brake hose 3 and the expansion chamber noise reduction principle of the first noise reduction strip 4, the composite noise reduction pipeline manufactured in the pipeline assembly reduces some pump source pulsation, reduces the propagation of mechanical vibration frequency noise in the lower end pipeline and the hydraulic booster, and simultaneously reduces the pulsation energy and the flow velocity of pulsating fluid, so that when the working pressure of the hydraulic booster is increased, the superposition of pulsation pressure is avoided, the flow velocity of the fluid is ensured to be within an acceptable range, turbulence is not easily generated, and the noise suppression of the hydraulic booster and the noise reduction of a pipeline system are realized.
As shown in fig. 1 and 3, further, the connecting member 2 includes: the brake hard pipe comprises a first nut head 22, a first middle pipe 23, a first lining core 24 and a first lining 25, wherein the first nut head 22 is used for being in threaded connection with the brake hard pipe 1; one end of the first intermediate pipe 23 is fixedly connected with the first nut head 22; the first lining core 24 is fixedly connected with the other end of the first middle pipe 23, and the first noise reduction strip 4 is connected with the first lining core 24; the first bush 25 is sleeved on the outer side of the first bush core 24, the first bush 25 is connected with the brake hose 3, and the first noise reduction strip 4 is riveted in the first bush core 24; the brake hard tube 1 is fixed on the connecting piece 2 through the first nut head 22, the first lining core 24 and the first lining 25 are arranged in the first middle tube 23 in a matching mode, the brake hose 3 is connected with the first lining core 24, the first noise reduction strip 4 is connected with the first lining core 24 in the brake hose 3, and the first noise reduction strip 4 extends for a certain length in the brake hose 3.
Brake fluid flows through the first channel, the second channel, the third channel and the fourth channel, the flow rate or pressure of the brake fluid changes along with time, and periodic pressure pulsation is generated in the brake fluid. The working principle of the hydraulic pump is that the volume of a sealed working cavity is changed alternately, so that the brake hydraulic system inevitably has pressure and flow pulsation. The noise of the brake hydraulic system mainly comes from pressure pulsation, hydraulic shock, liquid flow, air bubbles, cavitation noise and the like of the hydraulic system, and from the source position, the noise comes from the hydraulic component of the hydraulic system and the hydraulic system, the unreasonable design, installation and use of the system, improper installation and use can cause the reduction of the transmission efficiency of the hydraulic system, the abrasion of the component is increased, the working condition becomes severe, the service life of the hydraulic system is shortened, the connection and installation of the brake hydraulic system are enhanced through the arrangement of the connecting piece 2, and improper installation and use are improved.
As shown in fig. 1 and 4, further, the outer peripheral wall of the first bushing core 24 is formed with a first anti-slip tooth, the inner peripheral wall of the first bushing 25 is formed with a second anti-slip tooth, a first slot is configured between the outer peripheral wall of the first bushing core 24 and the inner peripheral wall of the first bushing 25, the brake hose 3 is inserted into the first slot, the first bushing core 24 and the first bushing 25 are cooperatively connected through the cooperation of the first anti-slip tooth and the second anti-slip tooth, and the brake hose 3 and the first bushing core 24 are cooperatively connected through the first slot, although the connection manner is not limited thereto, and an interference fit or a lug-groove fit may also be adopted, and is not particularly limited herein.
As shown in fig. 1 and 4, further, the brake hydraulic line 100 further includes: a fourth flow channel is formed in the pipeline joint 6, and the pipeline joint 6 is connected with the other end of the brake hose 3; the second noise reduction strip 5 is positioned in the brake hose 3, a second noise reduction flow channel is formed in the second noise reduction strip 5, and two ends of the second noise reduction flow channel are respectively communicated with the third flow channel 31 and the fourth flow channel; the two sections of the noise reduction bars are riveted in the brake hydraulic pipeline 100, an expansion chamber is formed between the two noise reduction bars and the brake hose 3, and acoustic impedance vector matching is generated by utilizing sudden change of the expansion chamber and the cross section of the pipeline, so that certain frequency noise waves are reflected and interfered on the cross section with the sudden change of the acoustic impedance, the purpose of eliminating noise is achieved, and the noise reduction effect is enhanced by the arrangement of the two noise reduction bars.
As shown in fig. 1 and 2, further, the pipe joint 6 includes: a second nut head 61, a second intermediate pipe 62, a second liner core 63, and a second liner 64; one end of the second intermediate pipe 62 is fixedly connected with the second nut head 61; the second bushing core 63 is fixedly connected with the other end of the second middle pipe 62, and the second noise reduction strip 5 is connected with the second bushing core 63; the second bush 64 is sleeved on the outer side of the second bush core 63, the second bush 64 is connected with the brake hose 3, and further, the second noise reduction strip 5 is riveted in the second bush core 63; the second bushing core 63 is fixedly connected with the other end of the second middle pipe 62, and the second noise reduction strip 5 is connected with the second bushing core 63; the second bush 64 is sleeved on the outer side of the second bush core 63, the second bush 64 is connected with the brake hose 3, and the second noise reduction strip 5 is riveted in the second bush core 63; the brake hard pipe 1 is fixed on the connecting piece 2 through the second nut head 61, the second lining core 63 and the second lining sleeve 64 are arranged in the second middle pipe 62 in a matched mode, the brake hose 3 is connected with the second lining core 63, the second noise reduction strip 5 in the brake hose 3 is connected with the second lining core 63, the second noise reduction strip 5 extends for a certain length in the brake hose 3, brake fluid flows through the first channel, the second channel, the third channel and the fourth channel, the connection and installation of a brake fluid pressure system are enhanced through the arrangement of the symmetrical connecting piece 2, and improper installation and use are improved.
As shown in fig. 1 and 4, further, the outer peripheral wall of the second liner 63 is formed with third anti-slip teeth, the inner peripheral wall of the second bushing 64 is formed with fourth anti-slip teeth, a second slot is formed between the outer peripheral wall of the second liner 63 and the inner peripheral wall of the second bushing 64, and the brake hose 3 is inserted into the second slot; the second core 63 and the second bushing 64 are connected in a matching manner by the third anti-slip tooth and the fourth anti-slip tooth, and the brake hose 3 and the second core 63 are connected in a matching manner by the second slot, although the connection manner is not limited to this, and an interference fit or a projection-groove fit may be adopted, and is not particularly limited herein.
Further, the length L1 of the first noise reduction bar 4, the length L2 of the second noise reduction bar 5 and the length L of the brake hose 3 satisfy: l > L1+ L2, wherein L2 > L1; auxiliary elements such as noise reduction strips are arranged in the hydraulic circuit, so that impact energy can be absorbed, and impact damage is reduced. However, the use of noise reduction bars inevitably increases the cost of the hydraulic circuit. The noise reduction strip is arranged at the stroke end point of the hydraulic pipeline, so that hydraulic impact in the braking process of the hydraulic cylinder can be reduced, and impact noise is reduced. The end part of the hydraulic pipeline is provided with a damping device or a damping loop, and the hydraulic impact phenomenon is eliminated by slowing down the moving speed of the valve core and prolonging the switching time of the control valve.
In some embodiments of the present invention, the first noise reduction strips 4 and/or the second noise reduction strips 5 are tubular structures, and an outlet communicated with the first noise reduction flow channel is formed on a tube wall of the first noise reduction strip 4, and the outlet extends spirally along the length direction of the first noise reduction strip 4, and/or an inlet communicated with the second noise reduction flow channel is formed on a tube wall of the second noise reduction strip 5, and the inlet extends spirally along the length direction of the second noise reduction strip 5. Here, the spiral extension value here is extended in a threaded manner along the length direction. At least part of the first noise reduction strips 4 and/or the second noise reduction strips 5 is/are made of an elastic material, which here may be rubber or plastic.
Thus, in one example, the first noise reduction strip 4 is a tubular structure, and an outlet communicated with the first noise reduction flow passage is formed on a pipe wall of the first noise reduction strip 4, and the outlet spirally extends along the length direction of the first noise reduction strip 4. From this, brake fluid enters into the first runner of making an uproar of falling after, can flow through the export, and simultaneously, the first strip 4 of making an uproar of falling can constitute by elastic material, from this, after brake fluid rushes into the first strip 4 of making an uproar of falling, can make the first runner of making an uproar of falling enlarge to make the bore grow of export, at this moment, brake fluid can obtain effective buffering promptly, can also flow from the export smoothly, thereby when effectively slowing down the brake fluid velocity of flow, reduced the noise. In another example, the second noise reduction strip 5 is a tubular structure, an inlet communicated with the second noise reduction flow channel is formed on a tube wall of the second noise reduction strip 5, and the inlet extends spirally along the length direction of the second noise reduction strip 5, so that the brake fluid in the brake hose 3 can impact towards the second noise reduction strip 5, and the second noise reduction strip 5 deforms, so that the brake fluid can better enter the second noise reduction flow channel from the inlet, and meanwhile, the second noise reduction strip 5 is made of an elastic material, so that after the brake fluid impacts into the second noise reduction strip 5, the second noise reduction flow channel can be enlarged, so that the caliber of the inlet is enlarged, at this time, the brake fluid can be effectively buffered, and can smoothly flow from the second noise reduction flow channel towards the pipeline joint 6, so that the noise is reduced while the flow rate of the brake fluid is effectively reduced.
According to the brake hydraulic line 100 of the embodiment of the present invention, the vibration of the hydraulic system is mainly derived from the pressure pulsation and the pressure shock inside the hydraulic system. If the flow rate or pressure of the liquid stream changes over time, periodic pressure pulsations are generated in the liquid. Since the working principle of the positive displacement hydraulic pump is the alternating change of the volume of the sealed working cavity, the hydraulic system inevitably has pressure and flow pulsation. In most cases, the pressure pulsations are detrimental to the operation of the system. The noise of the hydraulic system is mainly derived from pressure pulsation, hydraulic shock, liquid flow, air bubbles, cavitation noise and the like of the hydraulic system from the generation reason; through this application brake hydraulic line 100's rational arrangement, carry out reasonable installation and use through reasonable design, improve hydraulic system's transmission efficiency, reduce the wearing and tearing of component, improve the service behavior to increase hydraulic system's life. Through utilizing the flexible characteristic of brake hose 3 and the expansion chamber noise reduction principle of first strip 4 of making an uproar, the combined type noise reduction pipeline of making in the pipeline assembly has reduced some pump sources pulsation, the propagation of mechanical vibration frequency noise in lower extreme pipeline and hydraulic pressure booster has been reduced, also reduce the pulsation energy and the velocity of flow of pulsating fluid simultaneously, when making hydraulic pressure booster operating pressure increase, the stack of pulsation pressure does not have, guaranteed that the fluid velocity of flow is in receivable range, make it be difficult to produce the torrent, realize the noise reduction to hydraulic pressure booster noise suppression and pipe-line system.
The brake hydraulic system according to the embodiment of the invention includes: the steering pump and the brake hydraulic pipeline 100 are arranged, and the brake hard pipe 1 of the brake hydraulic pipeline 100 is communicated with the steering pump; various pressure valves exist in a brake hydraulic system, and the structure of the pressure valve, no matter the pressure valve, the flow control valve or the direction control valve is composed of a valve body, a valve core and a spring. The valve core and the spring structure are easy-to-vibrate bodies, and the working process of the valve core and the spring structure is an easy-to-vibrate process; if the design is not reasonable to manufacture and install, strong vibration noise can be caused by slight external force or displacement interference, or self-excited flutter noise can be generated, and even the noise can be applied to other elements and pipelines to cause strong vibration and noise of the whole system. The brake hydraulic system of the present invention controls the vibration and chatter noise of the spool by installing the brake hydraulic line 100, and can reduce the risk of damaging the sealing device, the line and other hydraulic components, and also reduce the vibration of the line and components, the looseness of the valve and the pipe joint, etc. Auxiliary elements such as noise reduction strips are arranged in the hydraulic circuit, so that impact energy can be absorbed, and impact damage is reduced.
The invention also provides a vehicle with the brake hydraulic system.
According to the vehicle provided by the embodiment of the invention, the auxiliary elements such as the noise reduction strips are arranged in the hydraulic circuit of the braking hydraulic system, so that impact energy can be absorbed, and impact damage is reduced.
Other constructions and operations of the brake hydraulic line 100 and the brake hydraulic system according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description herein, references to the description of the terms "some embodiments," "optionally," "further," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A brake hydraulic circuit (100), comprising:
the brake hard tube (1), wherein a first flow passage (11) is arranged in the brake hard tube (1);
one end of the connecting piece (2) is connected with the braking hard tube (1), and a second flow passage communicated with the first flow passage (11) is formed in the connecting piece (2);
one end of the brake hose (3) is connected with the other end of the connecting piece (2), and a third flow channel (31) is formed in the brake hose (3);
the noise reduction device comprises first noise reduction strips (4), wherein the first noise reduction strips (4) are located in the brake hose (3), first noise reduction flow channels are formed in the first noise reduction strips (4), and two ends of each first noise reduction flow channel are communicated with the second flow channel and the third flow channel (31) respectively.
2. The brake hydraulic line (100) of claim 1, further comprising:
the pipeline joint (6), a fourth runner is formed in the pipeline joint (6), and the pipeline joint (6) is connected with the other end of the brake hose (3);
and the second noise reduction strip (5) is positioned in the brake hose (3), a second noise reduction flow channel is formed in the second noise reduction strip (5), and two ends of the second noise reduction flow channel are respectively communicated with the third flow channel (31) and the fourth flow channel.
3. The brake hydraulic line (100) according to claim 1 or 2, wherein the first noise reduction bar (4) and/or the second noise reduction bar (5) have a tubular structure, an outlet communicated with the first noise reduction flow channel is formed on a tube wall of the first noise reduction bar (4), and the outlet extends spirally along a length direction of the first noise reduction bar (4), and/or an inlet communicated with the second noise reduction flow channel is formed on a tube wall of the second noise reduction bar (5), and the inlet extends spirally along a length direction of the second noise reduction bar (5).
4. The brake hydraulic line (100) according to claim 2, characterized in that at least part of the first noise reduction bar (4) and/or the second noise reduction bar (5) consists of an elastic material.
5. The brake hydraulic line (100) of claim 2,
the connector (2) comprises:
a first nut head (22), wherein the first nut head (22) is used for being in threaded connection with the brake hard pipe (1);
a first intermediate pipe (23), one end of the first intermediate pipe (23) being fixedly connected with the first nut head (22);
the first lining core (24), the first lining core (24) is fixedly connected with the other end of the first middle pipe (23), and the first noise reduction strip (4) is connected with the first lining core (24);
a first bushing (25), wherein the first bushing (25) is sleeved on the outer side of the first bushing core (24), the first bushing (25) is connected with the brake hose (3),
the line connection (6) comprises:
a second nut head (61);
a second intermediate pipe (62), one end of the second intermediate pipe (62) is fixedly connected with the second nut head (61);
the second lining core (63), the second lining core (63) is fixedly connected with the other end of the second middle pipe (62), and the second noise reduction strip (5) is connected with the second lining core (63);
a second bushing (64), wherein the second bushing (64) is sleeved outside the second bushing core (63), and the second bushing (64) is connected with the brake hose (3).
6. The brake hydraulic line (100) according to claim 5, wherein the first noise reduction bar (4) is riveted into the first bushing (24) and the second noise reduction bar (5) is riveted into the second bushing (63).
7. The brake hydraulic line (100) according to claim 5,
a first anti-slip tooth is formed on the outer peripheral wall of the first lining core (24), a second anti-slip tooth is formed on the inner peripheral wall of the first lining (25), a first slot is formed between the outer peripheral wall of the first lining core (24) and the inner peripheral wall of the first lining (25), and the brake hose (3) is inserted into the first slot; and/or the presence of a gas in the gas,
the outer peripheral wall of second lining core (63) is formed with the smooth tooth of third prevention, the internal perisporium of second bush (64) is formed with the smooth tooth of fourth prevention, construct the second slot between the outer peripheral wall of second lining core (63) and the internal perisporium of second bush (64), brake hose (3) are pegged graft in the second slot.
8. The brake hydraulic line (100) according to claim 2, wherein the length L1 of the first noise dampening bar (4), the length L2 of the second noise dampening bar (5) and the length L of the brake hose (3) are such that: l > L1+ L2, wherein L2 > L1.
9. A brake fluid pressure system, comprising:
a steering pump;
the brake hydraulic circuit according to any one of claims 1 to 8, the brake pipe (1) of which communicates with the steering pump.
10. A vehicle comprising the brake hydraulic system of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210351719.4A CN114771489A (en) | 2022-04-02 | 2022-04-02 | Brake hydraulic pipeline, brake hydraulic system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210351719.4A CN114771489A (en) | 2022-04-02 | 2022-04-02 | Brake hydraulic pipeline, brake hydraulic system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114771489A true CN114771489A (en) | 2022-07-22 |
Family
ID=82427092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210351719.4A Withdrawn CN114771489A (en) | 2022-04-02 | 2022-04-02 | Brake hydraulic pipeline, brake hydraulic system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114771489A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115257680A (en) * | 2022-09-05 | 2022-11-01 | 柏瑞科(上海)轨道交通科技有限公司 | Vibration reduction type electromechanical braking unit suitable for urban rail vehicle |
-
2022
- 2022-04-02 CN CN202210351719.4A patent/CN114771489A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115257680A (en) * | 2022-09-05 | 2022-11-01 | 柏瑞科(上海)轨道交通科技有限公司 | Vibration reduction type electromechanical braking unit suitable for urban rail vehicle |
| CN115257680B (en) * | 2022-09-05 | 2024-04-16 | 马天和 | Damping type electromechanical braking unit suitable for urban rail vehicle |
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Application publication date: 20220722 |