CN114278687B - Ocean environment-resistant pneumatic brake valve - Google Patents
Ocean environment-resistant pneumatic brake valve Download PDFInfo
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- CN114278687B CN114278687B CN202111384141.4A CN202111384141A CN114278687B CN 114278687 B CN114278687 B CN 114278687B CN 202111384141 A CN202111384141 A CN 202111384141A CN 114278687 B CN114278687 B CN 114278687B
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Abstract
The invention relates to an ocean environment-resistant pneumatic brake valve, and belongs to the field of airplane emergency braking. The sealing structure for isolating the inner cavity of the air pressure valve from the outside atmosphere is designed, namely, a through hole for connecting the outside atmosphere with an exhaust cavity is sealed on a common air pressure valve shell, a mounting seat for mounting an exhaust pipe joint is designed on the shell, the air in the exhaust cavity is discharged out of a machine body when the brake is released through the exhaust pipe joint of an exhaust pipeline on a connector, meanwhile, the through hole on a pressure head for discharging the air in the operating cavity is sealed, a sealing structure is added between the pressure head and an adjusting nut, a hole is opened on an exhaust valve assembly, the operating cavity and the exhaust cavity are connected, and the influence on the operation of the brake due to the sealing structure added between the pressure head and the adjusting nut is avoided. The invention solves the problem that when the pneumatic brake valve is used in a marine environment, the components in the inner cavity of the pneumatic brake valve are easy to corrode due to structural defects.
Description
Technical Field
The invention relates to the field of emergency braking of aircraft, in particular to an ocean environment-resistant pneumatic brake valve.
Background
With the increasing importance of China on ocean rights, a batch of machine types which are required to meet the use requirements of ocean environments are set aside in recent years, the machine wheel braking systems used by the machine types are required to have higher requirements on damp and heat resistance, mold and acid salt mist resistance, and the machine-mounted equipment used in the land environments is required to be subjected to adaptability improvement in the past. The emergency braking system can be divided into two types of hydraulic pressure and air pressure from working media, the air pressure braking valve is used as an important part of the air pressure emergency braking system, controllable braking pressure is provided for the wheel braking device and used for controlling the aircraft to brake in an emergency state, components in the air pressure braking valve are not provided with hydraulic oil protection of the hydraulic braking valve, and compared with the hydraulic braking valve, corrosion protection in a product is more required to be enhanced. Therefore, whether the structure of the pneumatic brake valve can be further perfected has important influence on the safety and reliability of the pneumatic emergency brake system in the marine environment.
The air pressure brake valve of the ordinary air pressure emergency brake system is generally provided with a hole on a shell to enable an internal exhaust cavity to be directly communicated with the atmosphere, and is used for exhausting gas in the brake cavity when the brake is released to release the brake pressure of a brake device piston.
The invention with the publication number of CN105216776A discloses a 21MPa pneumatic brake valve, wherein an inner cavity is directly communicated with the atmosphere in the invention, the internal protection in the marine environment is not considered, and the problem of internal corrosion is easy to occur in the marine environment.
Disclosure of Invention
Technical problem to be solved
In order to overcome the defect that when the pneumatic brake valve is used in the marine environment in the prior art, the components in the inner cavity of the pneumatic brake valve are easy to corrode due to structural defects, the invention provides the pneumatic brake valve resistant to the marine environment.
Technical proposal
A marine environment resistant pneumatic brake valve comprises a pressure head, an adjusting nut, a shell, a decompression spring, an exhaust valve assembly, a brake pipe joint, a piston, an air inlet valve assembly, a screw plug, an air inlet valve seat and an air inlet pipe joint; the air inlet valve assembly, the air inlet valve seat and the piston are all pressed in a left end hole of the shell through screw plugs; the exhaust valve assembly, the decompression spring and the pressure head are fixed in a hole at the right end of the shell through an adjusting nut; the brake pipe joint is connected and fixed with the upper end hole of the shell through threads; the air inlet pipe joint is connected with the screw plug through threads; the exhaust pipe joint is characterized in that an exhaust hole communicated with the outside atmosphere is eliminated from an exhaust cavity part of the shell, and an exhaust pipe joint mounting hole is newly added at the position of the lower end exhaust cavity and is used for mounting an exhaust pipe joint which is communicated with an exhaust pipeline on a machine; an inclined hole is formed between the inner cavity and the outer edge of the exhaust valve assembly and is communicated with the exhaust cavity; the adjusting nut is provided with a sealing structure for sealing the control cavity and the outside atmosphere; the pressure head cancels a through hole for communicating the control cavity with the outside atmosphere, and simultaneously increases a structure for limiting.
The sealing structure is an O-shaped sealing ring.
The limiting structure is as follows: the small diameter on the outer side of the pressure head is provided with a threaded part for installing a first locking nut, the maximum travel of the pressure head moving to the left side during braking is limited by adjusting the position of the first locking nut, the axial direction of the threaded part is provided with a groove, a stop gasket is installed between the two first locking nuts, when an inner hole of the stop gasket passes through the threaded part of the pressure head, a key on the inner hole is limited in the groove of the pressure head, and a dovetail structure at the upper end of the stop gasket and a square protruding structure at the lower end of the stop gasket are respectively turned to the hexagonal side surfaces of the two first locking nuts so as to limit the movement of the first locking nuts on the pressure head.
The left end of the pressure head is provided with a cross groove, and the cross groove is used for preventing the pressure head from rotating along with the rotation of the first locking nut when the right end rotates.
The exhaust valve component and the shell, the piston and the air inlet valve seat, and the air inlet valve component and the screw plug are provided with springs, so that the air inlet valve component, the piston and the exhaust valve component can recover to the initial position under the action of no operating force.
The exhaust pipe joint is fixed on the mounting hole through a third locking nut.
The inclined hole is phi 2.
Advantageous effects
Compared with the common pneumatic brake valve, the marine environment-resistant pneumatic brake valve provided by the invention has the following characteristics: the sealing structure for isolating the inner cavity of the air pressure valve from the outside atmosphere is designed, namely, a through hole for connecting the outside atmosphere with an exhaust cavity is sealed on a common air pressure valve shell, a mounting seat for mounting an exhaust pipe joint is designed on the shell, the air in the exhaust cavity is discharged out of a machine body when the brake is released through the exhaust pipe joint of an exhaust pipeline on a connector, meanwhile, the through hole on a pressure head for discharging the air in the operating cavity is sealed, a sealing structure is added between the pressure head and an adjusting nut, a hole is opened on an exhaust valve assembly, the operating cavity and the exhaust cavity are connected, and the influence on the operation of the brake due to the sealing structure added between the pressure head and the adjusting nut is avoided.
As shown in figure 3, the exhaust hole on the original shell body enables the product exhaust cavity to be directly communicated with the external atmosphere while the product exhaust function is realized, the easily corroded parts such as springs and the like of the exhaust cavity are directly exposed in the external atmosphere, the improved shell body is shown in figure 2, the exhaust cavity is connected with an exhaust pipeline on the machine through an exhaust pipe joint arranged on the shell body, external corrosions firstly weaken through the exhaust pipeline before entering the product, most of the corrosions are attached to the exhaust pipeline, and when the product works next time, the discharged gas blows out the attached corrosions, so that the corrosions are further reduced to enter the product exhaust cavity.
The through hole on the original pressure head is used for discharging gas of the operating cavity when the product works, so that the influence of the pressure holding of the operating cavity on the product performance is avoided, external corrosions can enter the operating cavity of the product through the through hole, parts such as an internal spring are corroded, the improved product seals the through hole on the pressure head shown in the figure 9, a sealing structure is additionally arranged between the pressure head and an adjusting nut shown in the matched figure 7, the operating cavity is prevented from being directly communicated with the external atmosphere, the exhaust of the operating cavity is changed into the opening of an exhaust valve shown in the figure 5 in the product, and the air is discharged through an exhaust pipe joint connected with the exhaust valve and then passes through an on-machine exhaust pipeline.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.
Fig. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a schematic structural view of a housing portion of the present invention.
Fig. 3 is a schematic structural view of a prior art brake valve housing.
Fig. 4 is a schematic structural view of the exhaust valve assembly of the present invention.
Fig. 5 is a schematic structural view of a prior art vent valve assembly.
Fig. 6 is a schematic structural view of the adjusting nut of the present invention.
Fig. 7 is a schematic structural view of a prior art adjusting nut.
Fig. 8 is a schematic view of the structure of the ram of the present invention.
Fig. 9 is a schematic diagram of the structure of a prior art ram.
Fig. 10 is a schematic view of the structure of the stopper washer.
In the figure:
1-a first lock nut; 2-a stop washer; 3-pressing head; 4-a sealing ring; 5-adjusting the nut; 6-a decompression spring; 7-a second lock nut; 8-a housing; 9-an exhaust valve assembly; 10-a third lock nut; 11-a spring; 12-exhaust pipe joint; 13-a piston; 14-a brake pipe joint; 15-a spring; 16-an intake valve seat; 17-an intake valve assembly; 18-a spring; 19-a screw plug; 20-fourth lock nut; 21-an air inlet pipe joint; 22-an air inlet cavity; 23-a reduced pressure chamber; 24-exhausting cavity; 25-steering chamber.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The invention comprises a lock nut, a stop gasket, a pressure head, an adjusting nut, a shell, a decompression spring, an exhaust valve assembly, an exhaust pipe joint, a brake pipe joint, a piston, an air inlet valve assembly, a screw plug and an air inlet pipe joint; wherein: the air inlet valve assembly, the air inlet valve seat and the piston are all pressed in a left end hole of the shell through screw plugs; the exhaust valve assembly, the decompression spring and the pressure head are fixed in a hole at the right end of the shell through an adjusting nut; the exhaust pipe joint is connected with the lower end hole of the shell through threads and the angle of the exhaust pipe joint is fixed by a lock nut; the brake pipe joint is connected and fixed with the upper end hole of the shell through threads; the air inlet pipe joint is connected with the screw plug through threads and the angle of the air inlet pipe joint is fixed by a locking nut.
The spring is arranged between the exhaust valve component and the shell, between the piston and the air inlet valve seat and between the air inlet valve component and the screw plug, so that the air inlet valve component, the piston and the exhaust valve component can recover to the initial position under the action of no operating force.
When the aircraft is braked by landing, a driver presses down the pressure head through the control rod on the aircraft and drives the decompression spring and the exhaust valve component to press the exhaust valve component on the piston, so that the decompression cavity is separated from the exhaust cavity. When the pressure head is continuously pressed down, the piston pushes the air inlet valve assembly through a small ejector rod on the air inlet valve assembly, air source gas enters the pressure reducing cavity from the air inlet cavity, and the air enters the braking device for braking after being reduced in pressure. When the locking nut on the outer diameter of the pressure head just leans against the adjusting nut, the pressure head reaches the maximum stroke, and the pneumatic brake valve outputs the maximum brake pressure.
As shown in fig. 1, the present embodiment includes a first lock nut 1, a stopper washer 2, a pressure head 3, a seal ring 4, an adjustment nut 5, a decompression spring 6, a second lock nut 7, a housing 8, an exhaust valve assembly 9, a third lock nut 10, a first spring 11, an exhaust pipe joint 12, a piston 13, a brake pipe joint 14, a second spring 15, an intake valve seat 16, an intake valve assembly 17, a third spring 18, a plug screw 19, a fourth lock nut 20, and an intake pipe joint 21.
As shown in fig. 2, the housing 8 is a carrier of the present embodiment, and the left end, the upper end, and the right end of the housing 8 are consistent with the prior art. The invention is mainly a lower end structure of the shell 8.
The air inlet pipe joint 21 is connected with the left end of the screw plug 19 through threads, and the installation angle of the air inlet pipe joint 21 is fixed through a fourth locking nut 20.
The piston 13 at the left end of the housing 8 is pressed against the inner step of the housing 8 by the second spring 15, and the intake valve seat 16 is pressed against the outer step of the left end of the housing 8 by the screw plug 19 screwed into the housing 8. The air inlet valve assembly 17 is pressed on the air inlet valve seat 16 through a third spring 18, and the spherical surface of a sealing element on the air inlet valve assembly 17 is contacted and sealed with the conical surface on the air inlet valve seat 16, an O-shaped sealing ring is arranged between the shell 8 and the air inlet valve seat 16, and the O-shaped sealing ring and the spherical surface of the sealing element on the air inlet valve assembly 9 play a role in isolating the air inlet cavity 22 from the air of the brake cavity. An O-shaped sealing ring is arranged between the shell 8 and the piston 13 to isolate a brake cavity from an exhaust cavity 24, and a brake pipe joint 14 is arranged at the upper end of the shell 8.
The first spring 11 is installed in the exhaust cavity 24 of the lower end of the shell 8, which is communicated with the inside, and the end surface of the first spring 11 is attached to the step surface of the outer edge of the exhaust valve assembly 9, so as to support the exhaust valve assembly 9. The decompression spring 6 is positioned in the right-end control cavity of the shell, and two ends of the decompression spring 6 are in contact with the inner cavity of the exhaust valve assembly 9 and the inner cavity of the pressure head 3; the pressure head 3 is limited in the control cavity through the adjusting nut 5, and the gap between the exhaust valve assembly 9 and the piston 13 is ensured by adjusting the position of the adjusting nut 5; the gap is determined according to the exhaust time of the product, after the adjustment is finished, the position of the adjusting nut 5 is fixed through the second locking nut 7, the lower end of the shell 8 is provided with the exhaust pipe joint 12, and after the exhaust pipe joint 12 rotates to a proper angle, the position is fixed through the third locking nut 10.
The exhaust valve assembly 9 is shown in fig. 4, a rubber sealing surface is vulcanized in the center of the end surface corresponding to the piston 13, and when the brake is performed, the exhaust valve assembly moves leftwards, and the rubber sealing surface is contacted with a boss of the end surface of the piston to isolate the brake cavity from the exhaust cavity. The inclined hole phi 2 is arranged between the inner cavity and the outer edge of the exhaust valve assembly 9 and is communicated with the exhaust cavity, so that the inclined hole phi 2 on the pressure head in the prior art is replaced, and the control cavity is prevented from being suffocated when the brake is released.
The adjusting nut 5 is sleeved on the outer circumferential surface of the right end of the shell 8 through threads, as shown in fig. 6, an inner hole of the adjusting nut is provided with a sealing ring groove, and a sealing ring 4 is arranged in the sealing ring groove and used for movably sealing with the small diameter outside the pressure head 3.
The small diameter on the outer side of the pressure head 3 shown in fig. 8 is provided with a threaded part for installing the first locking nuts 1, the maximum travel of the pressure head moving to the left side during braking is limited by adjusting the positions of the first locking nuts 1, the axial direction of the threaded part is provided with a groove, a stop gasket 2 is installed between the two first locking nuts 1, when an inner hole of the stop gasket 2 passes through the threaded part of the pressure head, a key on the inner hole is limited in the groove of the pressure head 3, and a dovetail structure at the upper end of the stop gasket 2 and a square protruding structure at the lower end of the stop gasket are respectively turned to the hexagonal side surfaces of the two first locking nuts 1 so as to limit the movement of the first locking nuts 1 on the pressure head 3. The left end of the pressure head 3 is provided with a cross groove for preventing the pressure head 3 from rotating along with the rotation of the first lock nut 1 when the right end rotates.
The exhaust chamber portion of the housing 8 shown in fig. 2 eliminates the 6 phi 4 exhaust holes in the prior art housing exhaust chamber which are in communication with the outside atmosphere, and redesign the mounting holes of the exhaust pipe joint 12 in the exhaust chamber position for mounting the exhaust pipe joint 12, the exhaust pipe joint 12 being in communication with the exhaust pipe on the machine.
The vent valve assembly 9 shown in fig. 4 adds a through hole to the prior art vent valve assembly structure that communicates the operating chamber with the vent chamber.
The adjusting nut 5 shown in fig. 6 adds a sealing structure for sealing the operating chamber from the outside atmosphere to the prior art adjusting nut structure.
The ram 3 shown in fig. 8 eliminates the through-hole for communicating the operating chamber with the outside atmosphere in the prior art ram structure, and adds a structure for limiting.
The marine environment-resistant pneumatic brake valve works by pressing down the pressure head 3 to drive the pressure reducing spring 6 to transmit force to the exhaust valve assembly 9, and isolating the pressure reducing cavity from the exhaust cavity. When the pressure head 3 is continuously pressed, the piston 13 pushes the air inlet valve assembly 17 through the ejector rod on the air inlet valve assembly 17, air source gas enters the brake cavity from the air inlet cavity, the air enters the brake device to brake after being decompressed, the pressure head 3 is continuously pressed, the first locking nut 1 is upwards adjusted to the stop position by the nut 5, and the maximum decompression pressure of the product can be achieved.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made without departing from the spirit and scope of the invention.
Claims (4)
1. The marine environment-resistant pneumatic brake valve comprises a pressure head (3), an adjusting nut (5), a shell (8), a decompression spring (6), an exhaust valve assembly (9), a brake pipe joint (14), a piston (13), an air inlet valve assembly (17), a screw plug (19), an air inlet valve seat (16) and an air inlet pipe joint (21); the air inlet valve assembly (17), the air inlet valve seat (16) and the piston (13) are all pressed in the left end hole of the shell (8) through a screw plug (19); the exhaust valve assembly (9), the decompression spring (6) and the pressure head (3) are fixed in a hole at the right end of the shell (8) through the adjusting nut (5); the brake pipe joint (14) is connected and fixed with the upper end hole of the shell (8) through threads; the air inlet pipe joint (21) is connected with the screw plug (19) through threads; the exhaust pipe joint is characterized in that an exhaust hole communicated with the outside atmosphere is eliminated from an exhaust cavity part of the shell (8), and an exhaust pipe joint (12) mounting hole is newly added at the lower end exhaust cavity position and is used for mounting the exhaust pipe joint (12), and the exhaust pipe joint (12) is communicated with an exhaust pipeline on a machine; an inclined hole is formed between the inner cavity and the outer edge of the exhaust valve assembly (9) and is communicated with the exhaust cavity; the adjusting nut (5) is provided with a sealing structure for sealing the control cavity and the outside atmosphere; the pressure head (3) cancels a through hole for communicating the control cavity with the outside atmosphere, and simultaneously adds a structure for limiting;
the limiting structure is as follows: the small diameter outside the pressure head (3) is provided with a threaded part for installing the first locking nuts (1), the maximum travel of the pressure head moving to the left side during braking is limited by adjusting the positions of the first locking nuts (1), the axial direction of the threaded part is provided with a groove, a stop gasket (2) is installed between the two first locking nuts (1), when an inner hole of the stop gasket (2) passes through the threaded part of the pressure head, a key on the inner hole is limited in the groove of the pressure head (3), and a dovetail structure at the upper end of the stop gasket (2) and a square protruding structure at the lower end of the stop gasket are respectively turned to the hexagonal side surfaces of the two first locking nuts (1) so as to limit the movement of the first locking nuts (1) on the pressure head (3);
the left end of the pressure head (3) is provided with a cross groove which is used for preventing the pressure head (3) from rotating along with the rotation of the first locking nut (1) at the right end;
the exhaust valve assembly (9) and the shell (8), the piston (13) and the air inlet valve seat (16), and the air inlet valve assembly (17) and the screw plug (19) are provided with springs, so that the air inlet valve assembly (17), the piston (13) and the exhaust valve assembly (9) can recover to the initial position under the action of no operating force.
2. The marine environment resistant pneumatic brake valve according to claim 1, wherein the sealing structure is an O-ring (4).
3. The marine environment resistant air pressure brake valve according to claim 1, wherein the exhaust pipe joint (12) is fixed to the mounting hole by a third lock nut (10).
4. The marine environment resistant pneumatic brake valve of claim 1, wherein said angled bore is Φ2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111384141.4A CN114278687B (en) | 2021-11-15 | 2021-11-15 | Ocean environment-resistant pneumatic brake valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111384141.4A CN114278687B (en) | 2021-11-15 | 2021-11-15 | Ocean environment-resistant pneumatic brake valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114278687A CN114278687A (en) | 2022-04-05 |
| CN114278687B true CN114278687B (en) | 2023-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111384141.4A Active CN114278687B (en) | 2021-11-15 | 2021-11-15 | Ocean environment-resistant pneumatic brake valve |
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| Country | Link |
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| CN (1) | CN114278687B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB212009A (en) * | 1922-12-20 | 1924-03-06 | Richard Thomson Glascodine | Improvements in or relating to railway vehicle braking systems |
| ES294988A1 (en) * | 1962-12-31 | 1964-04-16 | Bendix Westinghouse Automotive | Brake mechanism |
| GB1270098A (en) * | 1968-09-23 | 1972-04-12 | Automotive Prod Co Ltd | Improvements in or relating to vehicle braking mechanism |
| GB1369181A (en) * | 1972-02-22 | 1974-10-02 | Bendix Corp | Tandem spring and serivce brace actuator |
| GB1373196A (en) * | 1972-04-03 | 1974-11-06 | Bendix Corp | Tandem spring and service brake actuator |
| GB1444865A (en) * | 1973-08-31 | 1976-08-04 | Gen Signal Corp | Braking system for a light rail vehicle |
| DE4038032A1 (en) * | 1990-11-29 | 1992-06-04 | Teves Gmbh Alfred | Automatic adjustment for disc brake - has brake piston, with two adjustment sections, auxiliary piston and friction coupling |
| US5601160A (en) * | 1994-10-20 | 1997-02-11 | Case Corporation | Hydraulically actuated brake assembly for an off-highway implement |
| DE102008061346A1 (en) * | 2008-12-10 | 2010-06-17 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Spring brake cylinder with external venting |
| CN105216776A (en) * | 2015-05-12 | 2016-01-06 | 西安航空制动科技有限公司 | The pneumatic brake valve of a kind of 21MPa |
| CN106043258A (en) * | 2016-07-26 | 2016-10-26 | 聂瑞波 | Breaker pump and applications thereof on loaders |
| CN106800087A (en) * | 2015-11-26 | 2017-06-06 | 中国直升机设计研究所 | A kind of manned wheel braking controller for helicopter |
| CN208295002U (en) * | 2018-01-19 | 2018-12-28 | 常州市胜彪标准件模具有限公司 | A kind of internal respiration structure spring brake chamber |
| CN212744801U (en) * | 2020-06-24 | 2021-03-19 | 桐乡市博达金属压铸有限公司 | Piston type braking air chamber inner breather valve |
-
2021
- 2021-11-15 CN CN202111384141.4A patent/CN114278687B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB212009A (en) * | 1922-12-20 | 1924-03-06 | Richard Thomson Glascodine | Improvements in or relating to railway vehicle braking systems |
| ES294988A1 (en) * | 1962-12-31 | 1964-04-16 | Bendix Westinghouse Automotive | Brake mechanism |
| GB1270098A (en) * | 1968-09-23 | 1972-04-12 | Automotive Prod Co Ltd | Improvements in or relating to vehicle braking mechanism |
| GB1369181A (en) * | 1972-02-22 | 1974-10-02 | Bendix Corp | Tandem spring and serivce brace actuator |
| GB1373196A (en) * | 1972-04-03 | 1974-11-06 | Bendix Corp | Tandem spring and service brake actuator |
| GB1444865A (en) * | 1973-08-31 | 1976-08-04 | Gen Signal Corp | Braking system for a light rail vehicle |
| DE4038032A1 (en) * | 1990-11-29 | 1992-06-04 | Teves Gmbh Alfred | Automatic adjustment for disc brake - has brake piston, with two adjustment sections, auxiliary piston and friction coupling |
| US5601160A (en) * | 1994-10-20 | 1997-02-11 | Case Corporation | Hydraulically actuated brake assembly for an off-highway implement |
| DE102008061346A1 (en) * | 2008-12-10 | 2010-06-17 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Spring brake cylinder with external venting |
| CN105216776A (en) * | 2015-05-12 | 2016-01-06 | 西安航空制动科技有限公司 | The pneumatic brake valve of a kind of 21MPa |
| CN106800087A (en) * | 2015-11-26 | 2017-06-06 | 中国直升机设计研究所 | A kind of manned wheel braking controller for helicopter |
| CN106043258A (en) * | 2016-07-26 | 2016-10-26 | 聂瑞波 | Breaker pump and applications thereof on loaders |
| CN208295002U (en) * | 2018-01-19 | 2018-12-28 | 常州市胜彪标准件模具有限公司 | A kind of internal respiration structure spring brake chamber |
| CN212744801U (en) * | 2020-06-24 | 2021-03-19 | 桐乡市博达金属压铸有限公司 | Piston type braking air chamber inner breather valve |
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| Publication number | Publication date |
|---|---|
| CN114278687A (en) | 2022-04-05 |
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