CN111746491A - Pressure regulating relay valve - Google Patents
Pressure regulating relay valve Download PDFInfo
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- CN111746491A CN111746491A CN202010788104.9A CN202010788104A CN111746491A CN 111746491 A CN111746491 A CN 111746491A CN 202010788104 A CN202010788104 A CN 202010788104A CN 111746491 A CN111746491 A CN 111746491A
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- 238000010586 diagram Methods 0.000 description 4
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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
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/18—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere
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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
- B60T13/24—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 gaseous
- B60T13/26—Compressed-air systems
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- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a pressure-regulating relay valve, which is characterized in that a relay piston is divided into three sections, a first pressure-regulating cavity and a control cavity are formed, a pressure-regulating structure is arranged between the first pressure-regulating cavity and the control cavity, when a brake pedal is stepped on, the air pressure of a brake main valve enters through a control inlet to push the relay piston to move, the pressure change of the air entering the control cavity and the first pressure-regulating cavity is realized through the pressure-regulating structure, the output of the pressure in the control cavity is realized, the output of different brake pressures of a brake air chamber is realized, the functions of light-stepping and heavy-stepping brake are realized, and the problem of brake fatigue of large heavy trucks of vehicles in domestic markets is solved.
Description
Technical Field
The invention relates to the technical field of automobile parts, in particular to a pressure regulating relay valve.
Background
The relay valve is a part of an automobile air brake system, an air inlet of the relay valve is connected with an air storage cylinder, and an air outlet of the relay valve is connected with a brake air chamber. When the brake pedal is stepped on, the output air pressure of the brake valve is input as the control pressure of the relay valve, and is pushed open through the air inlet valve under the action of the control pressure, so that the compressed air directly enters the brake chamber through the air inlet by the air storage cylinder without flowing through the brake valve, the inflation pipeline of the brake chamber is greatly shortened, and the restarting process of the air chamber is accelerated. Chinese patent document CN102481919A discloses a relay valve device having a housing, a longitudinally movable relay piston arranged in the housing, a working valve device operable by the activation piston, an outlet chamber between the relay piston and the working valve device, and an intermediate wall arranged in the outlet chamber, which divides the outlet chamber into a chamber on the relay piston side and a relay east working chamber facing away from the relay piston, wherein the working valve device is provided with means for pressure equalization between the relay working chambers, which intermediate wall is integrally constructed with a valve seat of the working valve device as a combined intermediate wall-valve seat device. When the relay valve device realizes braking, the combined intermediate wall-valve seat device is integrally arranged, so that the structure of the internal part of the relay valve is simple, the installation is convenient, and the piston self-vibration of the relay piston can be reduced. However, the relay valve device cannot realize pressure-regulating braking, and the problem of fatigue of the truck during braking is difficult to solve. In order to solve the problem, chinese patent document CN207510415U discloses an emergency relay valve with a pressure regulating function, which includes an upper cover, a control piston, a second piston, a leather cup, a first spring, a lower housing and an exhaust seat, wherein the upper cover is provided with a pressure regulating device, and the pressure regulating device includes a second valve, a second spring, a first piston, a pressure regulating spring and a regulating screw. The emergency relay valve is provided with a pressure regulating device to regulate air pressure at an output port so as to meet different braking requirements, but the structure, position, connection relationship and principle of the pressure regulating device in the patent document are not ideal, so that the emergency relay valve is difficult to realize when a person skilled in the art installs the pressure regulating device or uses the pressure regulating device to form a new valve structure.
Disclosure of Invention
In order to solve the technical problem, the invention provides a pressure regulating relay valve which comprises a shell, wherein the shell comprises an upper shell and a lower shell which are matched with each other, a relay cavity is formed in the shell, a relay piston capable of reciprocating is arranged in the relay cavity, the relay piston is divided into three sections, namely a pressure applying section, a pressure regulating section and a control section, a first pressure regulating cavity is formed among the pressure applying section, the pressure regulating section and the relay cavity, a control cavity is formed at the periphery of the control section, and an air inlet and exhaust structure capable of being operated by the control section of the relay piston is arranged below the relay piston; still include the pressure regulating structure, the pressure regulating structure communicates respectively first pressure regulating chamber with the control chamber, through the control chamber with pressure variation in the first pressure regulating chamber realizes pressure output in the control chamber realizes different braking processes.
Further, the pressure regulating structure comprises a second pressure regulating cavity arranged on the lower shell, the second pressure regulating cavity is communicated with the control cavity through a pressure regulating port, a valve seat is arranged in the second pressure regulating cavity, and a valve seat through hole is formed in the valve seat; a first spring and a valve matched with the first spring are arranged in the second pressure regulating cavity on the left side of the valve seat through hole, airflow can flow through the valve or the outer side of the valve, and the valve can seal the left side of the valve seat through hole under the action of air pressure; a sliding sealed pressure regulating piston is arranged in the second pressure regulating cavity on the right side of the valve seat through hole, a first air passing structure is formed between the left end of the pressure regulating piston and the valve seat, and the first air passing structure is communicated with the valve seat through hole; a second air passing structure is formed in the second pressure regulating cavity and communicated with the first air passing structure; the two ends of the inclined hole are respectively communicated with the first pressure regulating cavity and the second gas passing structure; the two ends of the second spring are respectively abutted with the pressure regulating piston and the end structure of the second pressure regulating cavity; along with the change of the air pressure in the first pressure regulating cavity, the pressure regulating piston slides left and right.
Further, the pressure regulating port, the first spring and the center line of the valve coincide.
Furthermore, one end of the pressure regulating piston forms a collision section which passes through the valve seat through hole and is abutted against one end of the valve; meanwhile, a third air passing structure is formed between the interference section and the through hole of the valve seat, and the third air passing structure is communicated with the first air passing structure.
Furthermore, the end structure of the second pressure regulating cavity comprises an adjusting seat connected with the second pressure regulating cavity, and the adjusting seat is connected with an end cover; an adjusting inner cavity is formed in the adjusting seat, a second spring seat is arranged in the adjusting inner cavity, and two ends of the second spring are respectively abutted against the pressure adjusting piston and the second spring seat; the adjusting bolt penetrates through the end cover and the adjusting seat to be abutted to the second spring seat.
Further, still include and tighten the nut, tighten the nut with adjusting bolt looks adaptation.
The spring positioning device further comprises a first spring positioning seat, wherein the first spring is sleeved on the first spring positioning seat; and the first spring positioning seat forms a through hole, and two ends of the through hole are respectively communicated with the control cavity and the second pressure regulating cavity.
Further, the control chamber is formed with 3 control outlets.
Further, the pressure applying section and the pressure regulating section are in sliding seal with the relay cavity.
Further, the air intake and exhaust structure comprises a third spring seat arranged at the bottom of the relay cavity, a spring accommodating cavity is formed in the third spring seat, and a third spring is placed in the spring accommodating cavity; the sealing structure is matched with the third spring and the third spring seat, and a sealing surface is formed on the sealing structure; the pressure cover ring is arranged on the side wall of the relay cavity and is abutted against the sealing surface; an air storage cavity communicated with the air inlet is formed around the third spring seat; an air outlet channel is formed in the third spring seat and is communicated with an air outlet formed in the lower shell; the end part of the control section is matched with the sealing surface to realize the functions of air intake and exhaust.
Further, the gland ring is fixed through a first retainer ring; the gland ring and the third spring base are sealed with the inner wall of the relay cavity through a sealing piece.
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) according to the pressure regulating relay valve, a relay piston is divided into three sections, a first pressure regulating cavity and a control cavity are formed, a pressure regulating structure is arranged between the first pressure regulating cavity and the control cavity, when a brake pedal is stepped on, the air pressure of a brake master valve enters through a control inlet to push the relay piston to move, the pressure regulating structure changes the pressure of air entering the control cavity and the first pressure regulating cavity, the output of the pressure in the control cavity is realized, the brake air chamber outputs different brake pressures, the functions of light-treading and heavy-treading brake are realized, and the problem of fatigue and softness of brakes of large heavy trucks and vehicles in domestic markets is solved.
(2) According to the pressure regulating relay valve, the second pressure regulating cavity is arranged on the lower shell, so that the structure is more reasonable, and the optimization is more obvious; a valve seat is arranged in the second pressure regulating cavity, a valve seat through hole is formed in the valve seat, a first spring, a valve, a pressure regulating piston and a second spring are respectively arranged at the connecting end of the valve seat, a first air passing structure and a second air passing structure are formed at the same time, part of compressed air entering the control cavity enters the first pressure regulating cavity through the pressure regulating port, passes through or bypasses the valve, passes through the valve seat through hole, the first air passing structure, the second air passing structure and the inclined hole, and moves towards the valve seat through hole along with the change of the pressure of the air entering the control cavity, at the moment, the air pressure acting area of the control inlet is basically consistent with the air pressure acting area of the control outlet, and when the pressure of the compressed air continues to increase and reaches a set value, the valve closes the valve seat through hole; further, along with the footboard continues to step on, the pressure in the first pressure regulating intracavity promotes the pressure regulating piston through inclined hole, second, first structure of breathing in reverse and slides to make first pressure regulating intracavity pressure keeps unchangeable, at this moment, control intracavity pressure constantly rises to control entry and control export output ratio the inflection point appear and reach the biggest gradually, thereby realize gently stepping on the effect of lightly stopping, heavily stepping on heavily stopping.
(3) The pressure regulating relay valve is characterized in that the pressure regulating port, the first spring and the valve are superposed, and the valve is stable in reaction and quick in response due to the superposed structure of the central lines, so that faults are avoided; furthermore, the pressure regulating piston stroke is in conflict with the section, so that the combined structure of the first spring, the valve, the pressure regulating piston and the second spring is more stable, the use is smoother, and the effect and the stability are correspondingly more effective and more stable; furthermore, an adjusting structure is formed at the end part structure of the second pressure regulating cavity, so that the pressure set value can be adjusted as required, and the brake can be conveniently overhauled and adjusted in the running process of the vehicle; furthermore, through setting up first spring positioning seat for first spring stable positioning is not the off tracking in the structural grouping, effectively guarantees that the pressure regulating is stable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to derive other drawings without creative efforts.
FIG. 1 is a schematic diagram of a pressure regulated relay valve of the present invention;
FIG. 2 is a schematic diagram of the first embodiment of the pressure regulating relay valve of the present invention;
FIG. 3 is a schematic diagram of the second embodiment of the pressure regulating relay valve of the present invention;
FIG. 4 is a first schematic view of the flow of compressed gas through the pressure regulated relay valve of the present invention;
FIG. 5 is a second schematic diagram of the flow of compressed gas through the pressure regulated relay valve of the present invention;
FIG. 6 is a third schematic view of the flow of compressed gas through the pressure regulated relay valve of the present invention;
the reference numbers in the figures denote: 1-an upper shell; 2-a lower shell; 3-relay cavity; 4-a pressure application section; 5, a voltage regulating section; 6-a control section; 7-a first pressure regulating cavity; 8-a control chamber; 9-a second pressure regulating cavity; 10-a pressure regulating port; 11-valve seat; 12-valve seat through hole; 13-a first spring; 14-a valve; 15-pressure regulating piston; 16-a first gas passing structure; 17-a second gas passing structure; 18-inclined holes; 19-a second spring; 20-collision segment; 21-a third gas passing structure; 22-an adjusting seat; 23-end caps; 24-regulating the lumen; 25-a second spring seat; 26-an adjusting bolt; 27-tightening the nut; 28-a first spring positioning seat; 29-a through hole; 30-control outlet; 31-a control inlet; 32-a third spring seat; 33-a spring housing chamber; 34-sealing cover structure; 35-sealing surface; 36-a capping ring; 37-an air inlet; 38-an outlet channel; 39-air outlet; 40-a first sealing ring; 41-a second sealing ring; 42-a first collar; 43-third seal ring; 44-a second retaining ring; 45-a fourth seal ring; 46-a fifth sealing ring; 47-a third spring; and 48-air storage cavity.
Detailed Description
The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. The embodiments in the present invention, other embodiments obtained by persons skilled in the art without any inventive work, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
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, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment discloses a pressure regulating relay valve, which comprises a shell, wherein the shell comprises an upper shell 1 and a lower shell 2 which are matched with each other, a relay cavity 3 is formed in the shell, a relay piston capable of reciprocating is arranged in the relay cavity 3, the relay piston is divided into three sections, namely a pressure applying section 4, a pressure regulating section 5 and a control section 6, a first pressure regulating cavity 7 is formed among the pressure applying section 4, the pressure regulating section 5 and the relay cavity 3, a control cavity 8 is formed at the periphery of the control section 6, and an air inlet and exhaust structure capable of being operated by the control section 6 of the relay piston is arranged below the relay piston; still include the pressure regulating structure, the pressure regulating structure communicates respectively first pressure regulating chamber 7 with control chamber 8, through control chamber 8 with the pressure variation of first pressure regulating intracavity 7 realizes pressure output in the control chamber 8 realizes different braking processes.
The technical scheme is the core technical scheme of the invention, in the technical scheme, the relay piston is divided into three sections, a first pressure regulating cavity 7 and a control cavity 8 are formed, a pressure regulating structure is arranged between the first pressure regulating cavity 7 and the control cavity 8, when a brake pedal is stepped on, the air pressure of a brake main valve enters through a control inlet 31 to push the relay piston to move, the pressure of the air entering the control cavity 8 and the first pressure regulating cavity 7 is changed through the pressure regulating structure, so that the output of the pressure in the control cavity 8 is realized, the output of different brake pressures of a brake air chamber is realized, the functions of light braking and heavy braking are realized, and the problem of fatigue and softness of brakes of large heavy trucks and the like of vehicles in domestic markets is solved.
Specifically, as shown in fig. 1-3, in the present embodiment, the upper housing 1 and the lower housing 2, which are fitted to each other, adopt a fitting structure in the prior art, and the sealing between the two is realized by a sealing member, preferably a sealing ring; a relay cavity 3 is formed in the housing, the structural shape of the relay cavity 3 is not particularly limited, the relay cavity 3 is provided according to the structure of components arranged in the relay cavity, a control inlet 31 is formed on the upper housing 1, the control inlet 31 is respectively communicated with the relay cavity 3 and the master cylinder, when a driver steps on a pedal of the master cylinder, air pressure of the master cylinder enters the relay cavity 3 through the control inlet 31 to drive the relay piston to slide in the relay cavity 3. The relay piston is slidably sealed on the wall of the relay cavity 3 under the action of external force, the relay piston is divided into three sections, the three sections are connected together, namely a pressure applying section 4, a pressure regulating section 5 and a control section 6, the three sections can be integrally formed, can be connected in a connecting mode, such as welding and the like, the shapes of the three sections are not particularly limited, in the embodiment, the common shape and the cylindrical shape of the piston are respectively selected, certainly, in order to achieve certain purposes and effects, such as weight reduction or installation of sealing elements and the like, a cavity, a groove body or a chamfer and the like can be formed, the structure for achieving sliding sealing is that sealing elements, such as a first sealing ring 40 and a second sealing ring 41, are arranged between the pressure applying section 4 and the pressure regulating section 5 and the wall of the relay cavity 3, and how to fixedly install the sealing elements is common in the field, such as through the groove body, the sealing element is arranged in the groove body. The size requirements of the pressure applying section 4, the pressure regulating section 5 and the control section 6 are not particularly limited, in this embodiment, the cross section of the pressure applying section 4 is larger than that of the pressure regulating section 5, the cross section of the pressure regulating section 5 is larger than that of the control section 6, that is, the structure is from top to bottom, wherein the control section 6 is located in the relay cavity and is not in contact with the wall of the relay cavity; a first pressure regulating cavity 7 is formed among the pressure applying section 4, the pressure regulating section 5 and the relay cavity 3, specifically, the lower end surface of the pressure applying section 4, the side wall of the pressure regulating section 5 and the wall of the relay cavity 3 enclose the first pressure regulating cavity 7, and when the relay piston slides downwards, the volume of the first pressure regulating cavity 7 is reduced; a control cavity 8 is formed at the periphery of the control section 6, and an air inlet and exhaust structure capable of being operated by the control section 6 of the relay piston is arranged below the relay piston, wherein the control cavity 8 is formed by the side wall of the control section 6, the lower end surface of the pressure regulating section, the wall of the relay cavity 3 and the air inlet and exhaust structure in a surrounding manner; still include the pressure regulating structure, the pressure regulating structure communicates respectively first pressure regulating chamber 7 with control chamber 8, through relay piston slip in-process control chamber 8 with pressure variation in first pressure regulating chamber 7 realizes pressure output in the control chamber 8 realizes different braking processes, and this output passes through control export 30 that forms on the control chamber 8 carries out pressure output, control export 30's number can set up a plurality ofly, can realize that heavy-duty vehicles such as multiple tractors use like 3, and the commonality is strong.
As for the pressure regulating structure, in the present embodiment, it includes a second pressure regulating chamber 9 disposed on the lower shell 2, the structure of the second pressure regulating chamber 9 is set according to the component structure disposed therein, it communicates with the control chamber 8 through the above pressure regulating port 10, a valve seat 11 is disposed in the second pressure regulating chamber 9, the shape of the valve seat 11 is not particularly limited, it is formed with a valve seat through hole 12, the shape of the valve seat through hole 12 is not particularly limited, such as a cylindrical hole or a combination of several kinds, a specific point, a combination of a cylindrical hole and a horn hole, in order to ensure that the gas pressure transmission process is prevented from permeating from the periphery of the valve seat 11, a sealing member, such as a fifth sealing ring 46, is disposed between the valve seat 11 and the wall of the second pressure regulating chamber, as for how the sealing member is fixedly mounted, it is common in the art, such as through a groove body, the sealing element is arranged in the groove body, the installation mode of the valve seat 11 in the second pressure regulating cavity 9 is many, in the embodiment, a second retaining ring 44 is arranged and a groove matched with the second retaining ring 44 is arranged for installing the valve seat 11; a first spring 13 and a valve 14 matched with the first spring 13 are arranged in the second pressure regulating cavity 9 on the left side of the valve seat through hole 12, air flow can pass through the valve 14 or the outer side of the valve 14 to flow, the valve 14 can close the left side of the valve seat through hole 12 under the action of air pressure, preferably, the first spring 13 is sleeved on a first spring positioning seat 28, the first spring positioning seat 28 forms a through hole 29, two ends of the first spring positioning seat are respectively communicated with the control cavity 8 and the second pressure regulating cavity 9, the shape of the first spring positioning seat 28 is not particularly limited, in the embodiment, the first spring positioning seat is in a frustum shape, the valve 14 is in a rubber or silica gel structure with a framework, preferably, the outer contour of the valve is similar to that of the wall structure of the second pressure regulating cavity 9, and a ventilation gap is formed between the first spring positioning seat and the second spring positioning seat; preferably, both ends of the first spring 13 are connected with the first spring positioning seat 28 and the valve 14; a sliding sealed pressure regulating piston 15 is arranged in the second pressure regulating cavity 9 on the right side of the valve seat through hole 12, the structure of the pressure regulating piston 15 is not particularly limited, a generally selected cylindrical structure, such as a cylinder, of course, in order to realize sealing or adapt to other structures, a groove or a cavity is formed on the pressure regulating piston 15, the above-mentioned sealing structure is an existing sliding sealed structure, such as a sealing member between the pressure regulating piston 15 and the wall of the second pressure regulating cavity 9, such as a fourth sealing ring 45, as for how the sealing member is fixedly installed, which is common in the art, such as through the groove, the sealing member is installed in the groove; a first air passing structure 16 is formed between the left end of the pressure regulating piston 15 and the valve seat 11, the first air passing structure 16 is not particularly limited and can be independently arranged, and in the embodiment, the first air passing structure is a space between the pressure regulating piston 15 and the valve seat 11 except for the second retainer ring 44, so that the space between each component is effectively utilized, and the structure is simple; a second air passing structure 17 is further formed in the second pressure regulating cavity 9, the second air passing structure 17 is communicated with the first air passing structure 16, the structure of the second air passing structure 17 is not limited in particular, and in this embodiment, it is a groove on the wall of the second pressure regulating cavity 9; the two ends of the inclined hole 18 are respectively communicated with the first pressure regulating cavity 7 and the second gas passing structure 17; the pressure regulating piston 15 is provided with a pressure regulating cavity 9, and the pressure regulating piston 15 is provided with a pressure regulating piston 15; along with the air pressure change in the first pressure regulating cavity 7, the pressure regulating piston 15 slides from side to side, and in order to realize that the pressure regulating piston 15 slides under the air pressure change, the sealing element is arranged on the right side of the inclined hole 18, the first air passing structure 16 and the second air passing structure 17.
As a modification, an abutting section 20 is formed at one end of the pressure regulating piston 15, the abutting section 20 is long and strip-shaped, the structure of the abutting section is not particularly limited, the abutting section is preferably cylindrical, and the abutting section penetrates through the valve seat through hole 12 to abut against one end of the valve 14, a certain distance is formed between the valve and the valve seat in the normal running process of the vehicle, or the valve is partially ejected by the abutting section, at this time, the first spring 13, the first spring positioning seat 28 and the valve can be sleeved; meanwhile, a third air passing structure 21 is formed between the interference section 20 and the valve seat 11, and at this time, the third air passing structure 21 is a space between the interference section 20 and the valve seat 11, or a space left in the valve seat through hole 12 after the interference section 20 passes through the valve seat through hole 12; the third air passing structure 21 is communicated with the first air passing structure 16.
As another modification, in order to adjust the pressure variation or the braking effect, the end structure of the second pressure regulating cavity 9 includes an adjusting seat 22 connected to the wall of the second pressure regulating cavity 9 in various ways, in this embodiment, the two are connected by a screw thread, the adjusting seat 22 is connected with an end cover 23 in various ways, in this embodiment, the two are connected by a screw thread; an adjusting inner cavity 24 is formed in the adjusting seat 22, a second spring seat 25 is placed in the adjusting inner cavity 24, and one end of the second spring 19 is sleeved on the second spring seat 25; further, the gas pressure adjusting device further comprises an adjusting bolt 26, wherein the adjusting bolt 26 penetrates through the end cover 23 and the adjusting seat 22 to be abutted against the second spring seat 25, the adjusting bolt 26 is screwed, and the compression degree of the spring can be adjusted to adjust the gas pressure change; further, a clamping nut 27 is further included, and the clamping nut 27 is matched with the adjusting bolt 26 to reduce the looseness of the adjusting bolt 26.
As for the air intake and exhaust structure, the structure thereof is not limited specifically, and a structure for realizing the air intake and exhaust function in the conventional relay valve may also be adopted, in this embodiment, the air intake and exhaust structure includes a third spring seat 32 arranged at the bottom of the relay cavity 3, a spring accommodating cavity 33 is formed on the third spring seat 32, a third spring 47 is placed in the spring accommodating cavity, the air intake and exhaust structure further includes a sealing cover structure 34, the sealing cover structure 34 is matched with the third spring 47 and the third spring seat 32, and a sealing surface 35 is formed on the sealing cover structure 34, wherein the third spring 32 may be made of a plastic material, the sealing cover structure 34 includes a soft material such as rubber or silica gel of a fastener, and the structure thereof may be a structure in the prior art, which will not be described in detail herein; the structure of the gland ring 36 is not particularly limited, and is preferably annular, and the cross section of the gland ring can be a square, rectangular, L-shaped, Z-shaped structure, and the like, and the arrangement modes of the gland ring are various, the gland ring is fixed by combining a first retainer ring 42 arranged on the gland ring and a groove body structure for placing the first retainer ring 42, and the periphery of the gland ring is sealed by a third sealing ring 43; an air storage cavity 48 communicated with the air inlet 37 is formed around the third spring seat 32, wherein the number of the air inlets 37 is not limited, in the embodiment, preferably 2 air inlets can accelerate the braking response during braking, and the air inlets 37 are communicated with the air storage cylinder; an air outlet channel 38 is formed in the third spring seat 32 and is communicated with an air outlet 39 arranged on the lower shell 2, the air outlet channel 38 is a hollow part of the hollow third spring seat 32, the inner wall of the air outlet channel 38 is a strip-shaped body which is uniformly arranged in the circumferential direction and is formed on the inner wall of the air outlet channel in order to keep rigidity and not deform, the structure of the strip-shaped body is not particularly limited and can be arranged according to the specific structure of the hollow part; the end part of the control section 6 is matched with the sealing surface 35 to realize the functions of air intake and exhaust
Further, the center lines of the pressure regulating port 10, the through hole 29, the first spring 13, and the valve 14 coincide with each other.
Preferably, in order to achieve better sealing between the gland ring 36 and the sealing surface 35, between the end of the control section 6 and the sealing surface 35, and between the valve 14 and the valve seat 11, the sealing contact portion between the gland ring 36, the end of the control section 6, and the valve seat 11 is formed in an acute angle shape or an acute angle shape with rounded chamfer at the interface.
As shown in fig. 4-6, the application process of the present invention is as follows, wherein the blackened area is the position where the compressed gas is in different stages, specifically as follows:
as shown in fig. 4, when the vehicle normally runs, the air inlet 37 of the lower passenger body 2 is connected with the air storage cylinder, at this time, the sealing cover mechanism 34 is attached to the cover pressing ring 36 under the action of the air pressure of the third spring 32 and the air inlet 37, at this time, the compressed air is located in the air storage cavity 48, at the same time, the end of the control section 6 is not in contact with the sealing surface 35, the air outlet channel 38 and the air outlet 39 are in an open state, and at this time, the air pressure of the air storage cavity 48 is always kept connected with the air storage cylinder.
As shown in fig. 5, when the driver depresses the pedal of the master cylinder, the air pressure of the master cylinder enters through the control inlet 31 of the upper housing 1, and pushes the relay piston to move downward, so that the sealing cover mechanism 34 is separated from the gland ring 36 and attached to the end of the control section 6 of the relay piston, at this time, the air outlet channel 38 is in a closed state, the sealing cover mechanism 34 and the gland ring 36 are in an open state, and the air storage cavity 48 is communicated with the control cavity 8. The air pressure from the air storage cavity 48 enters the control cavity 8 and then reaches the brake air chamber through the control outlet 30, so that the effect of quick braking is achieved; meanwhile, when the control outlet 30 outputs air, the air pressure of the control cavity 8 enters the second pressure regulating cavity 9 through the pressure regulating port 10, and in the second pressure regulating cavity 9, the air pressure passes through the first spring 13, bypasses or passes through the valve 14, enters the first pressure regulating cavity 7 through the third air passing structure 21, the first air passing structure 16, the second air passing structure 17 and the inclined hole 18 and acts below the piston 3 (namely the area difference between S2 and S1), and adds the upward acting force of the compressed air of the control cavity 8 on the relay piston (the sum of the areas is basically S1), so that the air pressure acting area of the control cavity is basically consistent with the air pressure acting area of the output port. When the air pressure output by the control outlet 30 is gradually increased to make the left part of the second pressure regulating cavity 9 reach or exceed a pressure regulating value (which can be set according to requirements, such as 200KPa for illustrative principles), the valve 14 is attached to the end part of the valve seat 11 under the action of the first spring 13 and the second spring 19, as shown in fig. 6, the third air passing structure 21 is closed accordingly, and the air pressure output by the control outlet 30 stops supplying air to the first pressure regulating cavity 9; as the driver continues to step on the pedal, the pressure at the control inlet 31 continuously rises, while the pressure in the first pressure regulating cavity 9 exceeds the original pressure regulating value, and the third gas passing structure 21 is in a closed state; the air pressure of the first pressure regulating cavity 9 does not rise any more, the air pressure of the control inlet 31 rises continuously, the control outlet 30 only controls the upward acting force in the cavity and the acting force with the pressure regulating value of 200kPa in the cavity 8, at the moment, the area of the relay piston S1 and the area of the relay piston S2 begin to form a pressure difference, the output ratio of the relay valve control inlet 31 and the control outlet 30 begins to form an inflection point, and the inflection point gradually reaches the maximum value, (the maximum output ratio of the relay valve is 1:2.5 due to the action of the area difference), and therefore the effects of slightly stepping on the light brake and heavily stepping on the heavy brake are achieved.
When the driver lifts the pedal, the pressure of the control inlet 31 is reduced, the relay piston moves upwards under the action of the pressure of the third spring 47 and the control cavity 8, the gland ring 36 is attached to the sealing surface 35 of the sealing cover structure 34 again, the air inlet path is closed, meanwhile, the end part of the control section is separated from the sealing surface 35, the air outlet channel 38 is opened, and the air pressure of the brake air chamber is exhausted from the air outlet 39 through the control cavity 8 and the air outlet channel 38. At the same time, the pressure regulating piston 15 moves leftwards under the action of the second spring 19, the valve 14 leaves the valve seat 11, the third air passing structure 21 is opened, the pressure of the first pressure regulating cavity 7 is discharged from the air outlet 39 together, and at the moment, the relay valve state is restored to the normal state.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A pressure regulating relay valve comprises a shell, wherein the shell comprises an upper shell and a lower shell which are matched with each other, and a relay cavity is formed in the shell, and the pressure regulating relay valve is characterized in that a relay piston capable of reciprocating is arranged in the relay cavity, the relay piston is divided into three sections, namely a pressure applying section, a pressure regulating section and a control section, a first pressure regulating cavity is formed among the pressure applying section, the pressure regulating section and the relay cavity, a control cavity is formed at the periphery of the control section, and an air inlet and exhaust structure capable of being operated by the control section of the relay piston is arranged below the relay piston; still include the pressure regulating structure, the pressure regulating structure communicates respectively first pressure regulating chamber with the control chamber, through the control chamber with pressure variation in the first pressure regulating chamber realizes pressure output in the control chamber realizes different braking processes.
2. The pressure regulating relay valve according to claim 1, wherein the pressure regulating structure includes a second pressure regulating chamber provided on the lower housing, the second pressure regulating chamber communicating with the control chamber through a pressure regulating port, a valve seat disposed in the second pressure regulating chamber, the valve seat being formed with a valve seat through hole; a first spring and a valve matched with the first spring are arranged in the second pressure regulating cavity on the left side of the valve seat through hole, airflow can flow through the valve or the outer side of the valve, and the valve can seal the left side of the valve seat through hole under the action of air pressure; a sliding sealed pressure regulating piston is arranged in the second pressure regulating cavity on the right side of the valve seat through hole, a first air passing structure is formed between the left end of the pressure regulating piston and the valve seat, and the first air passing structure is communicated with the valve seat through hole; a second air passing structure is formed in the second pressure regulating cavity and communicated with the first air passing structure; the two ends of the inclined hole are respectively communicated with the first pressure regulating cavity and the second gas passing structure; the two ends of the second spring are respectively abutted with the pressure regulating piston and the end structure of the second pressure regulating cavity; along with the change of the air pressure in the first pressure regulating cavity, the pressure regulating piston slides left and right.
3. The pressure regulating relay valve as recited in claim 2 wherein an end of the pressure regulating piston forms an interference section that passes through the valve seat through hole and abuts against an end of the valve; meanwhile, a third air passing structure is formed between the interference section and the through hole of the valve seat, and the third air passing structure is communicated with the first air passing structure.
4. The pressure regulated relay valve of claim 3, wherein said second pressure regulating chamber end structure includes an adjustment seat connected to said second pressure regulating chamber, said adjustment seat having an end cap connected thereto; an adjusting inner cavity is formed in the adjusting seat, a second spring seat is arranged in the adjusting inner cavity, and two ends of the second spring are respectively abutted against the pressure adjusting piston and the second spring seat; the adjusting bolt penetrates through the end cover and the adjusting seat to be abutted to the second spring seat.
5. The pressure regulated relay valve as recited in claim 4 further comprising a jam nut adapted to fit said adjusting bolt.
6. The pressure regulated relay valve according to claim 5, further comprising a first spring positioning seat, said first spring being sleeved on said first spring positioning seat; and the first spring positioning seat forms a through hole, and two ends of the through hole are respectively communicated with the control cavity and the second pressure regulating cavity.
7. The pressure regulated relay valve as recited in claim 6 wherein the pressure regulating port, said through bore, said first spring and a centerline of said valve coincide.
8. The pressure regulated relay valve of claim 7, wherein said control chamber is formed with 3 control outlets.
9. The pressure regulated relay valve of claim 9, wherein said pressure applying section and said pressure regulating section are slidably sealed to said relay cavity.
10. The pressure regulated relay valve of claim 9, wherein said inlet and exhaust structure includes a third spring seat disposed at the bottom of the relay cavity, said third spring seat having a spring receiving chamber formed thereon, the third spring being disposed within said spring receiving chamber; the sealing structure is matched with the third spring and the third spring seat, and a sealing surface is formed on the sealing structure; the pressure cover ring is arranged on the side wall of the relay cavity and is abutted against the sealing surface; an air storage cavity communicated with the air inlet is formed around the third spring seat; an air outlet channel is formed in the third spring seat and is communicated with an air outlet formed in the lower shell; the end part of the control section is matched with the sealing surface to realize the functions of air intake and exhaust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010788104.9A CN111746491A (en) | 2020-08-07 | 2020-08-07 | Pressure regulating relay valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010788104.9A CN111746491A (en) | 2020-08-07 | 2020-08-07 | Pressure regulating relay valve |
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| Publication Number | Publication Date |
|---|---|
| CN111746491A true CN111746491A (en) | 2020-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010788104.9A Pending CN111746491A (en) | 2020-08-07 | 2020-08-07 | Pressure regulating relay valve |
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| Country | Link |
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| CN (1) | CN111746491A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114274936A (en) * | 2021-12-30 | 2022-04-05 | 瑞立集团瑞安汽车零部件有限公司 | Large-flow adjustable double-crossing proportional relay valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4666217A (en) * | 1983-12-12 | 1987-05-19 | Wabco Westinghouse | Load controller brake force controller for pneumatic motor vehicle or motor vehicle trailer brake systems |
| KR19980040212A (en) * | 1996-11-29 | 1998-08-17 | 박병재 | Relay valve of automotive pneumatic brake system |
| CN207510415U (en) * | 2017-08-28 | 2018-06-19 | 瑞立集团瑞安汽车零部件有限公司 | A kind of emergency relay valve with voltage regulation function |
| CN212500322U (en) * | 2020-08-07 | 2021-02-09 | 瑞立集团瑞安汽车零部件有限公司 | Pressure regulating relay valve |
-
2020
- 2020-08-07 CN CN202010788104.9A patent/CN111746491A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4666217A (en) * | 1983-12-12 | 1987-05-19 | Wabco Westinghouse | Load controller brake force controller for pneumatic motor vehicle or motor vehicle trailer brake systems |
| KR19980040212A (en) * | 1996-11-29 | 1998-08-17 | 박병재 | Relay valve of automotive pneumatic brake system |
| CN207510415U (en) * | 2017-08-28 | 2018-06-19 | 瑞立集团瑞安汽车零部件有限公司 | A kind of emergency relay valve with voltage regulation function |
| CN212500322U (en) * | 2020-08-07 | 2021-02-09 | 瑞立集团瑞安汽车零部件有限公司 | Pressure regulating relay valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114274936A (en) * | 2021-12-30 | 2022-04-05 | 瑞立集团瑞安汽车零部件有限公司 | Large-flow adjustable double-crossing proportional relay valve |
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