CN114508614A - Cartridge check valve for brake control system - Google Patents
Cartridge check valve for brake control system Download PDFInfo
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- CN114508614A CN114508614A CN202210101879.3A CN202210101879A CN114508614A CN 114508614 A CN114508614 A CN 114508614A CN 202210101879 A CN202210101879 A CN 202210101879A CN 114508614 A CN114508614 A CN 114508614A
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- valve body
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- valve
- spring seat
- diameter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
- F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/42—Arrangement or adaptation of brakes
- B64C25/44—Actuating mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
- F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
- F15B2013/004—Cartridge valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Aviation & Aerospace Engineering (AREA)
- Check Valves (AREA)
Abstract
A plug-in one-way valve for a brake control system comprises a taper pin, a clamping ring, a limiting ring, a spring seat, a spring, a valve core and a valve body, wherein the limiting ring, the spring seat, the spring and the valve core are fixed in the valve body through the clamping ring, and the taper pin fixes the valve body in a hole required to be installed. Through the integrated installation mode, the overall dimension of the product is reduced, the volume of the product is reduced, and the design of a miniaturized hydraulic element can be realized. The invention has lower requirements on the installation position and the installation size, can be inserted and integrated in a hydraulic joint and a hydraulic pipeline in a brake system, and effectively reduces the structural weight. Taking a single-frame airplane brake system as an example, the total weight of a one-way valve matched with a single brake system in the prior art is reduced from 1080g to 48 g.
Description
Technical Field
The invention relates to a check valve for an aircraft brake system, in particular to a cartridge check valve which is small in size, light in weight and convenient to install and disassemble.
Background
The check valve is applied to an aviation braking system, plays a role in restraining reverse pressure impact, and provides one-way conduction capability for the braking system when the normal braking system is opened under pressure. When the normal brake system pressure is closed, the one-way valve closes the oil way to prevent the downstream pressure of the one-way valve from reversely impacting.
The existing one-way valve of the brake system mostly adopts a ball valve type structure, and the main structure of the ball valve type structure is shown in figure 1. The sealing device mainly comprises a shell 1, a steel ball 2, a spring 3, a joint 4 and a sealing ring 5, is simple in structure and convenient to process, seals through a sharp edge on the shell 1 matched with the steel ball, and can break the edge after long-term work to cause sealing failure. The product does not meet the requirements of customers in the using process, so that the product is returned to the factory for maintenance.
The existing airplane has higher requirements on the design of hydraulic products, the integration level requirements are higher and higher, and the products are required to have the characteristics of small volume, light weight and high reliability.
The connection of the one-way valve for the existing brake system is suspended through two parts of threads, so that the overall dimension of the product is larger, and the weight index is increased.
An integrated positive high-sealing check valve is proposed in the invention creation with application number 202110047677.0. The shell outlet of the invention adopts a closing-up and thread screwing structure, the internal parts of the shell are fixed through the closing-up, and finally the one-way valve is fixed at the hole to be refitted in a thread screwing mode. The adopted closing-up and thread screwing structure leads to the increase of the volume and the weight of the one-way valve. The sealing form of the one-way valve is a sharp edge sealing line sealing form, and in work, the risk of edge breakage of the sharp edge sealing is high, so that the service life of the one-way valve is influenced.
The one-way valve is commonly used at the oil inlet end and the oil return end of the system in the braking system, and the one-way valve arranged at the oil inlet position of the system is generally used for preventing the pressure of a pressure accumulator in the emergency braking system from being released through the one-way valve after the pressure of the system is removed in the normal braking system. If the setting produces at braking system oil feed department check valve and collapses the limit, the check valve is because sealed form damages, and inside leakage increases, and the pressure of accumulator is released through the check valve in the emergency system, and emergency system pressure reduces, influences emergency system's use, influences the ground parking function of aircraft when serious. Check valves disposed on the return side of the system are typically used to prevent tank pressure from impacting hydraulic components in the braking system in the reverse direction after system pressure is removed. If the check valve arranged at the oil return position of the brake system generates edge breakage, the check valve is damaged due to a sealing mode, internal leakage is increased, oil liquid in the oil tank during pressure fluctuation reversely enters the brake system through the check valve, pressure equal to that of an airplane oil tank exists in a pipeline of the brake system, and the airplane brake system generates residual pressure in serious conditions.
Disclosure of Invention
In order to solve the defects of large volume, heavy weight and easy edge breakage of the existing one-way valve for the brake system, the invention provides a plug-in one-way valve for a brake control system.
The invention comprises a taper pin, a snap ring, a stop collar, a spring seat, a spring, a valve core and a valve body, wherein the valve core is positioned in the valve body, and the arc end surface of the sealing section of the valve core is attached to the conical surface of the oil inlet end of the valve body. The spring seat is positioned in the valve body, and the positioning step on the outer circumferential surface of the spring seat is attached to the positioning surface of the spring seat on the inner circumferential surface of the valve body; the front end of the spring seat is sleeved on the outer circumferential surface of the valve core. The spring is sleeved on the outer circumferential surface of the valve core oil chamber and is positioned in a spring cavity formed by the inner end surface of the spring seat and the inner end surface of the valve core sealing section. The clamping ring is positioned in the valve body, and the inner end surface of the clamping ring is attached to the rear end surface of the spring seat; the snap ring is fixedly connected with the valve body through the stop collar, and the valve core, the spring seat and the spring are assembled in the valve body. The taper pin is positioned in the valve body, and a safety gap of 0.5mm is formed between the inner end face of the taper pin and the outer end face of the snap ring.
The front end of the valve body is an oil inlet end, the oil inlet and the middle section of the valve body are in transition through a conical section, and a conical surface of 45 degrees is formed on the inner circumferential surface of the valve body. The rear section of the valve body consists of an equal-diameter section and a conical section, and the conical section is positioned at the rear part of the valve body; the inner diameter difference between the equal diameter section of the rear section of the valve body and the middle section of the valve body forms the spring seat positioning surface on the inner surface of the valve body. The inner diameter difference between the equal diameter section of the rear section of the valve body and the middle section of the valve body forms the spring seat positioning surface on the inner surface of the valve body. And a moving ring mounting groove is formed in the inner surface of the equal-diameter section of the rear section of the valve body.
The inner diameter of the oil inlet at the oil inlet end is d1，d14.8mm, this oil inlet's axial length is h, and h is 2.7 mm. The inner diameter of the middle section of the valve body is d2，d29.5 mm. The diameter of the equal-diameter section at the rear section of the valve body is d3，d320.8 mm; the taper of the conical section is 1: 12. The width of stop collar mounting groove is 1mm, and the degree of depth is 0.2 mm.
And a plurality of sealing grooves are processed on the outer circumferential surface of the rear end of the valve body. The depth of each sealing groove is 0.2mm, and the width is 0.5 mm.
The valve core is divided into a sealing section and an oil chamber section according to functions. The end face of the sealing section is spherical, and the spherical cambered surface is matched with the 45-degree conical surface in the valve body to form sealing of the oil inlet end of the valve body. The outer circumferential surface of the valve core is a stepped surface.
The outer diameter of the middle section of the valve core is the same as the inner diameter of the valve body, and the valve core and the valve body are in clearance fit; the gap is 0.1 mm. Oil in the spring cavity is discharged through the gap. The rear end of the valve core is an oil chamber section; the outer diameter of the oil chamber section is smaller than the inner diameter of the spring. The equal diameter section at the front end of the valve core and the middle section of the valve core are transited through an inclined plane. 4 oil way holes with the aperture of 1.5mm are uniformly distributed on the inclined plane and are communicated with the oil chamber on the valve core.
The inner circumferential surface of the spring seat is a stepped surface, and the inner surface of the front end of the spring seat, which is matched with the valve core, is in clearance fit with the outer surface of the valve core so as to meet the requirement of axial relative movement between the inner surface and the outer surface of the valve core. The outer diameter of the outer circumferential surface of the rear end of the spring seat is in clearance fit with the inner surface of the constant-diameter section of the rear section of the valve body. The rear end of the spring seat is provided with an oil outlet. The outer diameter of the rear end of the spring seat is 0.1mm smaller than the inner diameter of the matched part of the valve body so as to prevent the spring from moving in the valve body. The step difference formed by the outer circumferential surface of the spring seat forms a positioning surface of the spring seat. The end face of the rear end of the spring seat is an inclined plane of 45 degrees.
The outer diameter of the snap ring is the same as the inner diameter of the middle diameter section of the rear section of the valve body. The inner hole of the clamping ring is an oil outlet, and the inner surface of the oil outlet is a threaded surface used for being matched with a tool. The inner end face of the snap ring is a 45-degree inclined plane matched with the end face of the rear end of the spring seat. A stop collar mounting groove is formed in the outer circumferential surface of the snap ring and used for mounting the stop collar; in this embodiment, the width of stop collar mounting groove is 1mm, and the degree of depth is 0.7 mm.
The width of the stop collar is 0.6mm, and the thickness of the stop collar is 0.7 mm. The chamfer angle of the outer edge of the inner end surface of the stop collar is R0.1, and the chamfer angle of the outer edge of the outer end surface of the stop collar is R0.2-R0.4mm.
The taper pin is a hollow revolving body. The outer circumferential surface of the taper pin is a tapered surface matched with the inner surface of the rear end of the valve body. The inner hole of the taper pin is an oil outlet, and the inner surface of the oil outlet is a threaded surface used for being matched with a tool. The outer diameter of the outer end taper mouth of the taper pin is 0.2mm larger than that of the rear end taper mouth of the valve body, so that the taper pin is prevented from falling off after being pressed into the valve body.
The invention realizes the design of miniaturization, integration and plug-in mounting on the basis of the traditional one-way valve. The stop collar, the spring seat, the spring and the valve core are fixed in the valve body through the snap ring, and the valve body is fixed in a hole needing to be installed through the taper pin. Through the integrated installation mode, the overall dimension of the product is reduced, the volume of the product is reduced, and the design of a miniaturized hydraulic element can be realized. The invention has lower requirements on the installation position and the installation size, and can be integrated in a hydraulic joint and a hydraulic pipeline in an insertion mode. Taking a single-frame airplane brake system as an example, the total weight of matched one-way valves in a single brake system in the background technology is 1080g, and the weight of the airplane brake system is only 48g after the airplane brake system is adopted, so that the structural weight is effectively reduced. The effect display diagram of the invention is shown in figure 3. According to the invention, linear sealing is formed by matching the cambered surface of the spherical structure of the valve core 11 with the 36-degree conical surface in the valve body 12, and the sealing strip is positioned on the conical surface, so that a sharp edge sealing mode is avoided, and the damage of edge breakage cannot be caused in use; the plug-in design adopted by the invention can ensure that the one-way valve is integrated in a hydraulic pipeline and a hydraulic accessory in a brake system.
Drawings
FIG. 1 is a schematic diagram of a prior art check valve for a braking system;
FIG. 2 is a schematic structural view of a check valve for a braking system according to the present invention;
fig. 3 is a diagram showing the effect of the present invention.
In the figure: 1. a taper pin; 2. a snap ring; 3. a stop collar; 4. a spring seat; 5. a spring; 6. a valve core; 7. a valve body.
Detailed Description
The present embodiment is a check valve for a braking system.
The valve comprises a taper pin 6, a snap ring 7, a stop collar 8, a spring seat 9, a spring 10, a valve core 11 and a valve body 12, as shown in fig. 2. The valve body is a carrier of the invention, the valve core 11 is positioned in the valve body, and the circular arc end surface of the sealing section of the valve core is attached to the conical surface of the oil inlet end of the valve body. The spring seat 9 is positioned in the valve body, and a positioning step on the outer circumferential surface of the spring seat is attached to a spring seat positioning surface on the inner circumferential surface of the valve body; the front end of the spring seat is sleeved on the outer circumferential surface of the valve core. The spring 10 is sleeved on the outer circumferential surface of the oil chamber of the valve core 11 and is positioned in a spring cavity formed by the inner end surface of the spring seat and the inner end surface of the valve core sealing section. The snap ring 7 is positioned in the valve body, and the inner end surface of the snap ring is attached to the rear end surface of the spring seat 9; the snap ring is fixedly connected with the valve body through the stop collar 8, and the valve core, the spring seat and the spring are assembled in the valve body. The taper pin 6 is positioned in the valve body 12, and a safety gap of 0.5mm is formed between the inner end face of the taper pin and the outer end face of the snap ring 7.
The valve body 12 is cylindrical, and the inner surface thereof is a stepped surface. The front end of the valve body is an oil inlet end, and the inner diameter of an oil inlet at the oil inlet end is d1，d14.8mm, the oil is fedThe axial length of the port is h, h being 2.7 mm. The inner diameter of the middle section of the valve body is d2，d29.5 mm. The oil inlet and the middle section of the valve body are transited through a conical section, and a conical surface of 45 degrees is formed on the inner circumferential surface of the valve body. The rear section of the valve body consists of an equal-diameter section and a conical section, and the conical section is positioned at the rear part of the valve body; d of the constant diameter section3，d320.8 mm; the taper of the conical section is 1: 12. The difference in inner diameter between the constant diameter section of the rear valve body section and the middle valve body section forms the spring seat locating surface on the inner surface of the valve body 12. And an annular stop collar mounting groove is formed in the inner surface of the equal-diameter section of the rear section of the valve body and is used for embedding the stop collar 8. The width of stop collar mounting groove is 1mm, and the degree of depth is 0.2 mm.
And a plurality of sealing grooves are processed on the outer circumferential surface of the rear end of the valve body. The depth of each sealing groove is 0.2mm, and the width is 0.5 mm.
The valve core 11 is divided into a sealing section and an oil chamber section according to functions. The end face of the sealing section is of a spherical structure, the radius of the sphere is SR, and SR is 3 mm; the spherical cambered surface is matched with the 45-degree conical surface in the valve body to form sealing for the oil inlet end of the valve body. The outer circumferential surface of the valve core is a stepped surface. Wherein the diameter of the equal-diameter section at the front end of the valve core is 6.5 mm. The outer diameter of the middle section of the valve core is the same as the inner diameter of the valve body, and the valve core and the valve body are in clearance fit; the gap is 0.1 mm. Oil in the spring cavity is discharged through the gap. The rear end of the valve core is an oil chamber section; the outer diameter of the oil chamber section is smaller than the inner diameter of the spring 10. The equal diameter section at the front end of the valve core and the middle section of the valve core are transited through an inclined plane. 4 oil way holes with the aperture of 1.5mm are uniformly distributed on the inclined plane and are communicated with the oil chamber on the valve core.
The spring seat 9 is a hollow revolving body. The inner circumferential surface of the spring seat is a stepped surface, wherein the inner surface of the front end of the spring seat, which is matched with the valve core 11, is in clearance fit with the outer surface of the valve core so as to meet the requirement of axial relative movement between the inner surface and the outer surface. The outer diameter of the outer circumferential surface of the rear end of the spring seat is in clearance fit with the inner surface of the constant-diameter section of the rear section of the valve body. The rear end of the spring seat 9 is provided with an oil outlet.
The outer circumferential surface of the spring seat is also a stepped surface, and the outer diameter of the rear end of the spring seat is made smaller than the inner diameter of the valve body fitting part by 0.1mm, so that the spring 10 is prevented from moving in the valve body 12. The step difference formed by the outer circumferential surface of the spring seat forms a positioning surface of the spring seat. The end face of the rear end of the spring seat is an inclined plane of 45 degrees.
The spring 10 is a small-stiffness spring, the wire diameter is 0.5mm, and the maximum load is 2.1N.
The outer diameter of the snap ring 7 is the same as the inner diameter of the middle diameter section of the rear section of the valve body. The inner hole of the clamping ring is an oil outlet, and the inner surface of the oil outlet is a threaded surface used for being matched with a tool. The inner end face of the snap ring is a 45-degree inclined plane matched with the end face of the rear end of the spring seat. A stop collar mounting groove is formed in the outer circumferential surface of the snap ring and used for mounting the stop collar 8; in this embodiment, the width of stop collar mounting groove is 1mm, and the degree of depth is 0.7 mm.
The width of the stop collar 8 is 0.6mm, and the thickness is 0.7 mm. The chamfer angle of the outer edge of the inner end surface of the stop collar is R0.1, and the chamfer angle of the outer edge of the outer end surface of the stop collar is R0.2-R0.4mm.
The taper pin 6 is a hollow revolving body. The outer circumferential surface of the taper pin is a tapered surface matched with the inner surface of the rear end of the valve body. The inner hole of the taper pin is an oil outlet, and the inner surface of the oil outlet is a threaded surface used for being matched with a tool. The outer diameter of the outer end taper mouth of the taper pin is 0.2mm larger than the rear end taper mouth of the valve body 12, so that the taper pin 6 is prevented from falling off after being pressed into the valve body 12.
During assembly, the limiting ring 8 is firstly installed on the ring groove of the snap ring 7. The spring 10 is sleeved on the valve core 11, the valve core 11 is sleeved on an inner hole of the spring seat 9, a 90-degree conical surface on the spring seat 9 is completely attached to a 90-degree conical surface on the snap ring 7, and force is applied from the snap ring 7, so that the stop collar 8 is pushed into an annular groove on the valve body 12. The mounting effect is checked by applying a corresponding force through the thread designed on the snap ring 7.
When the valve body 12 is used, the assembled valve body 12 is pushed into a valve hole to be subjected to plug-in fit, the taper pin 6 is pressed into the valve body 12, the distance between the taper pin pressing position and the end face of the valve body 12 is guaranteed to be +/-0.13 mm, and the taper pin 6 is guaranteed to completely press the valve body 12 into the plug-in hole.
After the installation is finished, the valve core 11 is pressed, whether the one-way valve works flexibly after the installation is checked, and whether the valve core 11 can be completely restored to the debugging initial position after the external force is removed is observed.
The rigidity of the spring is very small in the embodiment, the resistance in the hydraulic flow direction is reduced, the spring force only needs to overcome the friction force on the valve core 11, the opening pressure of the check valve designed by the embodiment is 0.035-0.055 MPa, and the weight is 8 g.
The one-way valve for the brake system is finally designed through the method, and is simple in structure, small in size and light in weight. The parts can be used repeatedly, the installation and the disassembly are convenient, and the product performance is stable and reliable.
Claims (9)
1. A cartridge one-way valve for a brake control system is characterized by comprising a taper pin (6), a snap ring (7), a stop collar (8), a spring seat (9), a spring (10), a valve core (11) and a valve body (12), wherein the valve core (11) is positioned in the valve body, and the arc end surface of the sealing section of the valve core is attached to the conical surface of the oil inlet end of the valve body; the spring seat (9) is positioned in the valve body, and a positioning step on the outer circumferential surface of the spring seat is attached to a spring seat positioning surface on the inner circumferential surface of the valve body; the front end of the spring seat is sleeved on the outer circumferential surface of the valve core; the spring (10) is sleeved on the outer circumferential surface of the oil chamber of the valve core (11) and is positioned in a spring cavity formed by the inner end surface of the spring seat and the inner end surface of the valve core sealing section; the clamping ring (7) is positioned in the valve body, and the inner end surface of the clamping ring is attached to the rear end surface of the spring seat (9); the snap ring is fixedly connected with the valve body through the stop collar (8), and the valve core, the spring seat and the spring are assembled in the valve body; the taper pin (6) is positioned in the valve body (12), and a safety gap of 0.5mm is reserved between the inner end face of the taper pin and the outer end face of the snap ring (7).
2. A cartridge check valve for a brake control system according to claim 1, wherein an inner surface of the valve body (12) is a stepped surface; the front end of the valve body is an oil inlet end, the oil inlet and the middle section of the valve body are transited through a conical section, and a conical surface of 45 degrees is formed on the inner circumferential surface of the valve body; the rear section of the valve body consists of an equal-diameter section and a conical section, and the conical section is positioned at the rear part of the valve body; the inner diameter difference between the equal-diameter section of the rear section of the valve body and the middle section of the valve body forms the spring seat positioning surface on the inner surface of the valve body (12) of the valve; the inner diameter difference between the equal-diameter section of the rear section of the valve body and the middle section of the valve body forms the spring seat positioning surface on the inner surface of the valve body (12) of the valve; and a moving ring mounting groove is formed in the inner surface of the equal-diameter section of the rear section of the valve body.
3. The cartridge check valve as recited in claim 2, wherein the oil inlet of the oil inlet end has an inner diameter d1，d1The axial length of the oil inlet is h which is 4.8mm, and h is 2.7 mm; the inner diameter of the middle section of the valve body is d2，d29.5 mm; the diameter of the equal-diameter section at the rear section of the valve body is d3，d320.8 mm; the taper of the conical section is 1: 12; the width of stop collar mounting groove is 1mm, and the degree of depth is 0.2 mm.
4. The cartridge check valve for a brake control system according to claim 2, wherein a plurality of sealing grooves are formed on an outer circumferential surface of a rear end of the valve body; the depth of each sealing groove is 0.2mm, and the width is 0.5 mm.
5. A cartridge check valve for a brake control system according to claim 1, wherein the spool (11) is functionally divided into a sealing section and an oil chamber section; the end surface of the sealing section is spherical, and the spherical cambered surface is matched with the 45-degree conical surface in the valve body to form sealing for the oil inlet end of the valve body; the outer circumferential surface of the valve core is a stepped surface;
the outer diameter of the middle section of the valve core is the same as the inner diameter of the valve body, and the valve core and the valve body are in clearance fit; the gap is 0.1 mm; oil in the spring cavity is discharged through the gap; the rear end of the valve core is an oil chamber section; the outer diameter of the oil chamber section is smaller than the inner diameter of the spring (10); the equal-diameter section at the front end of the valve core is transited with the middle section of the valve core through an inclined plane; 4 oil way holes with the aperture of 1.5mm are uniformly distributed on the inclined plane and are communicated with the oil chamber on the valve core.
6. The cartridge check valve for the brake control system according to claim 1, wherein the inner circumferential surface of the spring seat (9) is a stepped surface, and an inner surface of the front end of the spring seat, which is engaged with the spool (11), is in clearance fit with an outer surface of the spool so as to satisfy relative axial movement therebetween; the outer diameter of the outer circumferential surface of the rear end of the spring seat is in clearance fit with the inner surface of the equal-diameter section of the rear section of the valve body; the rear end of the spring seat (9) is provided with an oil outlet; the outer diameter of the rear end of the spring seat is 0.1mm smaller than the inner diameter of the valve body matching part so as to prevent the spring (10) from moving in the valve body (12); the step difference of the outer circumferential surface of the spring seat forms a positioning surface of the spring seat; the end face of the rear end of the spring seat is an inclined plane of 45 degrees. (ii) a
7. The cartridge check valve for a brake control system according to claim 1, wherein an outer diameter of the snap ring (7) is the same as an inner diameter of an intermediate diameter section in a rear section of the valve body; the inner hole of the clamping ring is an oil outlet, and the inner surface of the oil outlet is a threaded surface matched with the tool; the inner end surface of the snap ring is a 45-degree inclined surface matched with the end surface of the rear end of the spring seat; a stop collar mounting groove is formed in the outer circumferential surface of the snap ring and used for mounting the stop collar (8); in this embodiment, the width of stop collar mounting groove is 1mm, and the degree of depth is 0.7 mm.
8. A cartridge check valve for a brake control system according to claim 1, wherein the stopper ring (8) has a width of 0.6mm and a thickness of 0.7 mm; the chamfer angle of the outer edge of the inner end surface of the stop collar is R0.1, and the chamfer angle of the outer edge of the outer end surface of the stop collar is R0.2-R0.4mm.
9. The cartridge one-way valve for a brake control system according to claim 1, wherein the taper pin (6) is a hollow solid of revolution; the outer circumferential surface of the taper pin is a conical surface matched with the inner surface of the rear end of the valve body; the inner hole of the taper pin is an oil outlet, and the inner surface of the oil outlet is a threaded surface matched with a tool; the outer diameter of the outer end taper mouth of the taper pin is 0.2mm larger than the rear end taper mouth of the valve body (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210101879.3A CN114508614A (en) | 2022-01-27 | 2022-01-27 | Cartridge check valve for brake control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210101879.3A CN114508614A (en) | 2022-01-27 | 2022-01-27 | Cartridge check valve for brake control system |
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| CN114508614A true CN114508614A (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210101879.3A Pending CN114508614A (en) | 2022-01-27 | 2022-01-27 | Cartridge check valve for brake control system |
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| CN (1) | CN114508614A (en) |
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| CN110864145A (en) * | 2019-10-14 | 2020-03-06 | 中石化石油机械股份有限公司研究院 | Cartridge type high pressure check valve with adjustable opening pressure |
| CN210212356U (en) * | 2019-04-19 | 2020-03-31 | 西安航空制动科技有限公司 | Exhaust device for removing air from aircraft braking system |
| CN211117808U (en) * | 2019-12-05 | 2020-07-28 | 陕西科技大学 | A detachable T-shaped spool check valve |
| CN214788290U (en) * | 2021-04-30 | 2021-11-19 | 宁海鸿创金属制品有限公司 | Shuttle valve |
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| US5664901A (en) * | 1995-04-03 | 1997-09-09 | Hilti Aktiengesellschaft | Expansion dowel |
| JP2000240830A (en) * | 1999-02-18 | 2000-09-08 | Smc Corp | Check valve |
| CN1319729A (en) * | 2000-03-15 | 2001-10-31 | 希尔蒂股份公司 | Expansion nail |
| CN201843867U (en) * | 2010-11-14 | 2011-05-25 | 周其恩 | Plastic expansion type connecting and fixing device for pipes |
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| CN202597788U (en) * | 2012-03-28 | 2012-12-12 | 浙江澳川液压器材有限公司 | Hydraulic check valve |
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| CN211117808U (en) * | 2019-12-05 | 2020-07-28 | 陕西科技大学 | A detachable T-shaped spool check valve |
| CN214788290U (en) * | 2021-04-30 | 2021-11-19 | 宁海鸿创金属制品有限公司 | Shuttle valve |
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Application publication date: 20220517 |