CN112744350B - Cylinder seat assembly capable of preventing oil liquid pollution and method for preventing oil liquid pollution - Google Patents
Cylinder seat assembly capable of preventing oil liquid pollution and method for preventing oil liquid pollution Download PDFInfo
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- CN112744350B CN112744350B CN202110190676.1A CN202110190676A CN112744350B CN 112744350 B CN112744350 B CN 112744350B CN 202110190676 A CN202110190676 A CN 202110190676A CN 112744350 B CN112744350 B CN 112744350B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/42—Arrangement or adaptation of brakes
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Abstract
The invention discloses a cylinder block assembly capable of preventing oil liquid pollution and a method for preventing oil liquid pollution, wherein the cylinder block assembly capable of preventing oil liquid pollution comprises a cylinder block and hydraulic cavities arranged on the cylinder block, the hydraulic cavities are uniformly distributed on the same circular track, and pistons are arranged in the hydraulic cavities; dry-type return mechanisms are arranged between the adjacent hydraulic cavities and are uniformly distributed on the same circular track; the dry type return mechanism is connected with a compression ring, and the piston can push the compression ring to move towards the direction away from the cylinder seat; the invention adopts the dry-type force returning mechanism to reset the compression ring, and because the dry-type force returning mechanism is not communicated with the hydraulic cavity through an oil way and is not communicated with the piston, impurities or fragments generated in the operation of the dry-type force returning mechanism can not enter the oil liquid, so that the pollution of the impurities or the fragments generated in the operation process of the dry-type force returning mechanism to the oil liquid can be avoided, and the oil liquid can be ensured to meet the standard.
Description
Technical Field
The invention relates to the technical field of airplane brake devices, in particular to a cylinder base assembly capable of preventing oil pollution and a method for preventing oil pollution by the same.
Background
The cylinder block, the piston, the force returning mechanism and the like form a cylinder block assembly, and the cylinder block is a main working element of the airplane brake device. The cylinder block is generally made of aluminum casting. When the requirement on the internal pressure of the cylinder seat is high, an aluminum forging can be adopted. Generally, the oil pollution degree grade in the cylinder seat is not greater than 7 grades of GJB 420B; the temperature of the cylinder seat is not allowed to exceed 150 ℃, and the sealing ring and the oil liquid are prevented from being aged. The movable sealing ring in the cylinder seat assembly is generally an O-shaped rubber sealing ring, the sealing is simple and reliable, but the movable sealing ring is easy to age at high temperature and has large abrasion loss after long-term use. After the cylinder seat assembly is used for a certain time, the cylinder seat sealing ring is aged and abraded to form scraps; the surface coating layer contacted with the oil falls off; residual scraps and the like left in the disassembly of the oil interface threads of the cylinder block assembly cause that the oil pollution degree grade is greater than 7 grade of GJB 420B; problems such as servo valve blockage, insensitive piston motion, etc. in the brake system may arise.
Chinese patent application publication No. CN 107878737A discloses an aircraft brake wheel, in which a return spring structure is provided in each piston, and after braking is completed, the piston is reset by using the return spring structure, but the operation of the return spring inevitably causes pollution to oil liquid to a certain extent, such as generation of chips or impurities, so that the oil liquid in the scheme may no longer meet the standard requirements after long-term use; chinese patent No. CN 207860438U discloses a diameter-variable piston linkage type automatic return mechanism, which is provided with a large piston and a small piston of two specifications on a cylinder seat of a brake wheel, wherein a return mechanism is arranged in the large piston, and the small piston is not provided with a return mechanism any longer, but the return mechanism still has the possibility that a return spring in the return mechanism generates impurities or chips to pollute oil in the operation process, so the oil still may not meet the standard requirement in the scheme.
Disclosure of Invention
The invention aims to provide a cylinder base assembly capable of preventing oil liquid pollution and a method for preventing oil liquid pollution by the same, which are used for solving the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a cylinder base assembly capable of preventing oil liquid pollution, which comprises a cylinder base and hydraulic cavities arranged on the cylinder base, wherein the hydraulic cavities are uniformly distributed on the same circular track, and pistons are arranged in the hydraulic cavities; dry-type return mechanisms are arranged between the adjacent hydraulic cavities and are uniformly distributed on the same circular track; the dry-type return mechanism is connected with a compression ring, and the piston can push the compression ring to move towards the direction away from the cylinder seat.
Preferably, the inner wall of the hydraulic cavity is provided with a combined sealing ring, the combined sealing ring comprises a rubber sealing ring statically sealed with the hydraulic cavity and a polytetrafluoroethylene ring dynamically sealed with the piston, the cross section of the rubber sealing ring is in an O shape, the cross section of the polytetrafluoroethylene ring is in an L shape, and the O-shaped clamp is placed on the inner side of the L shape and statically sealed with the L shape.
Preferably, the opening part of the hydraulic pressure cavity is provided with a first-stage step and a second-stage step, the combined sealing ring is arranged at the second-stage step, and the first-stage step is provided with a fixing ring.
Preferably, a heat insulation pad is arranged between the piston and the pressing ring, and the piston is not in contact with the pressing ring.
Preferably, the cylinder block is provided with a blind mounting hole, the dry-type return mechanism is arranged in the blind mounting hole, the dry-type return mechanism comprises a return spring and a pull rod, the opening direction of the blind mounting hole is opposite to the moving-out direction of the piston, the bottom of the blind mounting hole is provided with a through hole, one end of the pull rod is connected with the compression ring, and the other end of the pull rod penetrates through the through hole and is in contact connection with the other end of the return spring.
Preferably, a hydraulic circuit is arranged on the cylinder base and is a square loop, the square loop is communicated with an oil filler pipe nozzle, and the vertex intersection of the square loop is communicated with the hydraulic cavity.
Preferably, the square loop is communicated with a cleaning filler neck, and the direction of the cleaning filler neck is directed obliquely downward.
The invention also provides a method for preventing the cylinder block assembly from being polluted by the oil liquid, wherein a piston and a dry-type force returning mechanism are arranged on the cylinder block; when the piston is filled with oil, the piston pushes the compression ring to move axially away from the cylinder seat; when the piston drains oil, the dry-type return mechanism drives the compression ring to reset; the pistons communicate through a hydraulic circuit.
Preferably, the hydraulic circuit is connected with an oil filler neck, the oil filler neck is made of steel materials, and the cylinder seat is made of aluminum materials.
Preferably, before assembly, the hydraulic circuit is cleaned by alcohol and is blown clean by high-pressure gas; after assembly, the piston is made to act continuously, and the hydraulic circuit is cleaned continuously by using clean oil.
Compared with the prior art, the invention achieves the following technical effects:
(1) The dry-type return mechanism is adopted to reset the compression ring, the dry-type return mechanism is not communicated with the hydraulic cavity through an oil way, the dry-type return mechanism is not communicated with the piston, impurities or fragments generated in the operation of the dry-type return mechanism cannot enter oil liquid, and the pollution of the impurities or the fragments generated in the operation process of the dry-type return mechanism to the oil liquid can be avoided, so that the oil liquid can be ensured to meet the standard, and the stability and the reliability of a brake system can be further ensured;
(2) The inner wall of the hydraulic cavity is provided with the combined sealing ring, the combined sealing ring is used for realizing the sealing between the hydraulic cavity and the piston, the rubber sealing ring can be used for realizing the static sealing relative to the hydraulic cavity and the polytetrafluoroethylene ring can be used for realizing the dynamic sealing relative to the piston, so that the influence of abrasive dust generated by friction is reduced by utilizing the characteristic of small friction resistance of polytetrafluoroethylene while better sealing effect is realized, and the pollution degree grade of oil can be ensured to meet the standard requirement;
(3) The O-shaped section rubber sealing ring is clamped and placed on the inner side of the L-shaped section polytetrafluoroethylene ring and is in static sealing with the L-shaped section polytetrafluoroethylene ring, the O-shaped section is used for realizing static sealing, the O-shaped section rubber sealing ring can be easily deformed after extrusion to increase the contact area and realize better static sealing, the L-shaped section rubber sealing ring is used for realizing dynamic sealing, and the L-shaped section rubber sealing ring can form dynamic sealing with a larger contact surface with a piston under the condition of low extrusion deformation degree, so that the friction loss can be reduced, the generation of abrasive dust can be reduced, and the oil can be ensured to meet the standard;
(4) According to the invention, the heat insulation pad is arranged between the compression ring and the piston, and can prevent brake heat from being directly transferred to the cylinder base assembly and oil, so that oil pollution caused by thermal aging of the oil and a sealing ring can be prevented, and the oil can be ensured to meet the standard;
(5) According to the invention, the opening direction of the installation blind hole for installing the dry-type return mechanism is opposite to the moving-out direction of the piston, the through hole is formed in the bottom of the installation blind hole, the pull rod penetrates through the through hole to reset the compression ring, only the end part of the pull rod is in contact with the compression ring, and the contact area of the pull rod and the compression ring can be obviously reduced, so that the heat of the compression ring can be effectively prevented from being transferred to the cylinder seat through the pull rod to influence oil in a hydraulic cavity, and further, the oil can be ensured to meet the standard;
(6) The invention is provided with the cleaning filler neck which faces to the inclined lower part, so that the oil can flow out or be sprayed out downwards in the cleaning and disassembling processes, and the pollution caused by the fact that the oil flows upwards to other parts such as a cylinder seat can be prevented.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a front view of a cylinder block assembly;
FIG. 2 isbase:Sub>A sectional view taken along line A-A of FIG. 1;
FIG. 3 is an enlarged view of section I of FIG. 2;
wherein, 1, a cylinder seat; 11. a hydraulic chamber; 12. installing blind holes; 13. a hydraulic circuit; 2. a piston; 3. a heat insulating pad; 4. a compression ring; 5. a combined sealing ring; 51. a rubber seal ring; 52. a polytetrafluoroethylene ring; 6. a dry-type return mechanism; 61. a return spring; 62. a pull rod; 7. an oil filler neck; 8. blocking the cover; 9. cleaning the filler neck; 10. and (4) fixing the ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a cylinder base assembly capable of preventing oil liquid pollution and a method for preventing oil liquid pollution thereof, which aim to solve the problems in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-2, the present invention provides a cylinder block assembly for preventing oil contamination, which comprises a cylinder block 1 and a hydraulic chamber 11 disposed on the cylinder block 1, wherein the hydraulic chamber 11 can be directly processed on the cylinder block 1, or the hydraulic chamber 11 can be disposed on a mounting structure, and the mounting structure is mounted on the cylinder block 1; the piston 2 is arranged in the hydraulic cavity 11, the hydraulic cavity 11 is communicated with oil, the piston 2 can move by the oil entering the hydraulic cavity 11, and it should be noted that each hydraulic cavity 11 can be communicated with the same oil, that is, all the hydraulic cavities 11 act by the pressure of the same oil, so as to realize the synchronous action of the piston 2; the hydraulic cavities 11 are uniformly distributed on the same circular track on the cylinder block 1, so that the pistons 2 in the hydraulic cavities 11 can provide uniform acting force when moving; the dry-type return mechanisms 6 are arranged between the adjacent hydraulic cavities 11, so that the dry-type return mechanisms 6 are not communicated with the piston 2, the pollution of impurities or scraps generated in the operation process of the dry-type return mechanisms 6 to oil can be avoided, the oil can be ensured to meet the standard, and the stability and the reliability of a brake system can be further ensured; in addition, the dry-type return mechanism 6 may be directly provided on the cylinder block 1, or may be provided on another mounting structure, and the mounting structure is mounted on the cylinder block 1; the dry-type return mechanisms 6 are uniformly distributed on the same circular track so as to apply force uniformly when resetting is performed, and it should be noted that the dry-type return mechanisms 6 may be distributed on the same circular track as the hydraulic chamber 11 or on different circular tracks; the dry type return mechanism 6 is connected with a compression ring 4, the compression ring 4 can be made of materials with low heat transfer coefficient, such as 1Cr18Ni9, but not limited to the materials, in addition, the connection can be welding, riveting or clamping, a chuck is arranged by the dry type return mechanism 6, and the chuck can be positioned on the other surface of the compression ring 4 to carry out clamping connection on the compression ring; the clamp ring 4 is used for being connected with the brake disc subassembly, can promote the clamp ring 4 to keeping away from the direction of cylinder block 1 and remove to the direction of brake disc subassembly promptly when piston 2 receives the effect of the fluid in the hydraulic pressure chamber 11, promotes the brake disc subassembly and realizes the braking action, after the braking action, under the effect of dry-type power mechanism 6 of returning, can pull back the clamp ring 4 and reset to can relieve the braking action, avoid the condition of wheel locking.
As shown in fig. 2-3, the inner wall of the hydraulic chamber 11 is provided with a combined seal ring 5, the combined seal ring 5 comprises a rubber seal ring 51 which is statically sealed with the hydraulic chamber 11 and a polytetrafluoroethylene ring 52 which is dynamically sealed with the piston 2, so that static sealing and dynamic sealing can be respectively realized by adopting different seal structures according to the characteristics of static sealing and dynamic sealing, the influence of abrasion debris generated by friction can be reduced by utilizing the characteristic of small friction resistance of the polytetrafluoroethylene ring 52 while better sealing effect is realized, the abrasion debris can be prevented from entering the oil liquid, the pollution degree grade of the oil liquid can be ensured to meet the standard requirement, in addition, the piston 2 can also be made into a cylinder by adopting aluminum alloy, and the surface of the outer cylindrical dynamic sealing surface of the piston 2 is treated with a hard anodized layer, so that the hardness is improved, and the generation of the abrasion debris is reduced; furthermore, the cross section of the rubber sealing ring 51 is O-shaped, the cross section of the polytetrafluoroethylene ring 52 is L-shaped, that is, the rubber sealing ring 51 with the O-shaped cross section is clamped at the inner side of the polytetrafluoroethylene ring 52 with the L-shaped cross section and is statically sealed with the polytetrafluoroethylene ring, the static sealing is realized by utilizing the O-shaped cross section, the O-shaped cross section can be easily deformed after extrusion, the contact area is increased, the better static sealing is realized, the dynamic sealing is realized by utilizing the L-shaped cross section, the extrusion degree is not easy to be overlarge during the dynamic sealing, otherwise, the resistance is large, the abrasion is large, and after the L-shaped structure is adopted, the dynamic sealing state with a larger contact surface can be formed with the piston 2 under the condition that the extrusion degree is low, so that the friction loss can be reduced, the generation of abrasive dust can be reduced, and the oil liquid is ensured to meet the standard.
As shown in fig. 2, a first step and a second step are arranged at the opening of the hydraulic cavity 11 from outside to inside, that is, the opening of the hydraulic cavity 11 has a gradually changing step structure with a large outside and a small inside, and the combined sealing ring 5 can be installed by using the step structure, specifically, the combined sealing ring 5 can be arranged at the second step, and the second step can be exposed because the inner diameter of the first step is larger than that of the second step, so that the combined sealing ring 5 can be conveniently installed at the second step; if the first-stage step and the second-stage step are not arranged, the combined sealing ring 5 needs to be directly arranged in an annular groove formed in the inner diameter of the hydraulic cavity 11, and the sealing ring can be damaged due to poor installation; after the combined sealing ring 5 is mounted at the second-level step, the fixing ring 10 is mounted at the first-level step, and the combined sealing ring 5 can be fixed at the second-level step, in addition, it should be noted that the height of the second-level step can be larger than the width of the combined sealing ring 5, that is, when the piston 2 moves back and forth, the combined sealing ring 5 can have a certain movement space, so that abrasion caused by sliding friction of the combined sealing ring 5 can be further reduced.
As shown in fig. 2, a heat insulation pad 3 is disposed between the piston 2 and the compression ring 4, and the heat insulation pad 3 may be made of a material with a low heat transfer coefficient, such as TA7, but is not limited thereto; the heat insulation pad 3 can be arranged on the piston 2, at the moment, a groove is arranged at the end part of the piston 2, the heat insulation pad 3 is arranged in the groove to limit and fix the heat insulation pad 3, the heat insulation pad 3 can also be arranged on the compression ring 4, at the moment, another groove is arranged on the compression ring 4 corresponding to the piston 2, and the heat insulation pad 3 is arranged in the groove to limit and fix; it should be noted that no matter which scheme is adopted, the piston 2 and the compression ring 4 are not contacted after the heat insulation pad 3 is arranged, so that the heat insulation pad 3 can be utilized to prevent the brake heat from being directly transmitted to the cylinder seat 1 and oil, oil and the combined sealing ring 5 and other sealing rings can be prevented from being polluted by the oil due to thermal aging, and the oil can be ensured to meet the standard.
As shown in fig. 1-2, the cylinder block 1 is provided with a blind mounting hole 12, the blind mounting hole 12 can be directly machined on the cylinder block 1, the dry-type restoring force mechanism 6 is arranged in the blind mounting hole 12, or the blind mounting hole 12 can be arranged on a mounting structure, the mounting structure can be independent of the cylinder block 1, and the dry-type restoring force mechanism 6 is mounted on the mounting structure and then mounted on the cylinder block 1; the dry type return mechanism 6 comprises a return spring 61 and a pull rod 62, the opening direction of the installation blind hole 12 is opposite to the moving-out direction of the piston 2, when the piston 2 moves outwards, the return spring 61 is compressed, extruded and deformed to store certain elastic potential energy, and when oil of the piston 2 is decompressed, the return spring 61 is reset by means of elasticity of the return spring 61; the bottom of the installation blind hole 12 is provided with a through hole, one end of the pull rod 62 is connected with the compression ring 4, when the connection is performed, the pull rod 62 can be provided with an expanded end, the compression ring 4 is provided with an opening, the diameter of the opening is smaller than that of the expanded end, after the other end of the pull rod 62 passes through the opening, the pull rod 62 can be connected with the compression ring 4 in a one-way mode, meanwhile, the pull rod 62 passes through the through hole in the bottom of the installation blind hole 12 and passes through the inner diameter side of the return spring 61, then the other end of the pull rod 62 is provided with a blocking spring or a blocking sheet to be abutted against the end of the return spring 61, so that when the compression ring 4 moves towards the direction far away from the cylinder base 1, the pull rod 62 can be driven to drive the return spring 61 to compress, otherwise, when the oil is decompressed, the return spring 61 can also reset the compression ring 4 through the pull rod 62; the opening direction of installation blind hole 12 is opposite with the removal direction of piston 2 to set up the through-hole in installation blind hole 12 bottom, utilize pull rod 62 to pass the through-hole and realize the reseing to clamp ring 4, only the tip of pull rod 62 contacts with clamp ring 4, the area of contact of reduction pull rod 62 and clamp ring 4 that can show, thereby can effectually avoid clamp ring 4's heat to pass through on pull rod 62 transmits cylinder block 1 and influence the fluid in hydraulic pressure chamber 11, and then can guarantee that fluid accords with the standard.
As shown in fig. 1-2, a hydraulic circuit 13 is disposed on the cylinder block 1, and the hydraulic circuit 13 can communicate all the hydraulic chambers 11 to realize the synchronous movement of all the pistons 2; for the trend of fluid, avoid communicating with the installation blind hole 12 of installation dry-type power return mechanism 6, can set up hydraulic circuit 13 into square loop, at this moment, the summit crossing point department of square loop is provided with hydraulic pressure chamber 11 and communicates with hydraulic circuit 13, the four sides outside of square loop is provided with installation blind hole 12 respectively, that is to say, hydraulic pressure chamber 11 and installation blind hole 12 all are provided with four, and evenly distributed, can realize the reciprocating motion stable to clamp ring 4, square loop intercommunication has fluid filler neck 7, fluid filler neck 7 can communicate with one side of square loop, and fluid filler neck 7 can be parallel with the axis of cylinder block 1, the business turn over of fluid is realized through fluid filler neck 7.
The square loop is also communicated with a cleaning filler neck 9, the direction of the cleaning filler neck 9 can face to the oblique lower side, and oil can flow out or spray downwards in the cleaning and disassembling processes, so that the oil can be prevented from flowing upwards to other parts such as the cylinder seat 1 to cause pollution.
The invention also provides a method for preventing the cylinder block assembly from being polluted by the oil liquid, which can apply the cylinder block assembly mentioned above, the piston 2 and the dry-type force returning mechanism 6 are arranged on the cylinder block 1, the piston 2 and the dry-type force returning mechanism 6 can be arranged on the same circular track and are arranged at intervals, however, the oil path of the piston 2 is not communicated with the dry-type force returning mechanism 6, namely, the oil liquid is not influenced by the action of the dry-type force returning mechanism 6; when the piston 2 is filled with oil, the piston 2 pushes the compression ring 4 to move away from the cylinder seat 1 in the axial direction, namely, the compression ring 4 is pushed to move towards the direction of the brake disc assembly for braking; when the piston 2 discharges oil, the dry-type return mechanism 6 drives the compression ring 4 to reset, namely, the compression ring 4 is driven to move in a direction away from the brake disc assembly to avoid the wheel locking; each piston 2 is communicated through a hydraulic circuit 13, so that unified action of the pistons 2 is realized, stable movement of the compression ring 4 is ensured, and stable and reliable braking is realized.
The hydraulic circuit 13 is connected with the oil filler neck 7, the oil filler neck 7 is made of steel material, for example, 45# steel, but not limited to this material, the cylinder seat 1 is generally made of aluminum material, the oil filler neck 7 can be connected to the cylinder seat 1 by a threaded connection mode, and the oil filler neck 7 is fixed and not detached in the using process under the condition that the oil filler neck 7 is not damaged; the external interface connected with the oil pipe connecting nozzle 7 is generally made of steel, for example, 45# steel can be adopted, but the connection is not limited to the steel, the steel is connected with the steel, the generation of abrasive dust can be well prevented, and the situation that the oil pollution degree grade does not meet the standard requirement due to the fact that aluminum is mixed with the steel when the external interface thread is directly connected with the cylinder seat 1 and aluminum dust is generated due to abrasion of the aluminum cylinder seat 1 can be avoided; in addition, the cleaning filler neck 9 can also be made of steel materials, so that aluminum scraps are prevented from entering the hydraulic circuit 13 to pollute oil.
Before assembly, the cylinder base assembly uses alcohol to clean the hydraulic loop 13 and uses high-pressure gas to blow clean; after assembly, the piston 2 acts continuously, the hydraulic circuit 13 is cleaned continuously by using clean oil, and the pollution degree grade of the oil in the hydraulic circuit 13 meets the standard requirement before use.
The main measures for preventing the oil liquid pollution are as follows:
the cylinder seat 1 is provided with a hydraulic circuit 13, a mounting blind hole 12 of the dry-type return mechanism 6, an oil filler pipe nozzle 7 and a connecting threaded hole thereof, a cleaning filler pipe nozzle 9 and a connecting threaded hole thereof and the like; the hydraulic circuit 13 is communicated with a hydraulic cavity 11 for installing the piston 2; and no other threads are arranged outside the threads of the external interfaces (the oil filler neck 7 and the cleaning filler neck 9) in the hydraulic circuit 13, so that the oil is prevented from being polluted by chips generated during screwing, and the oil pollution degree grade is not in accordance with the standard requirement. The installation blind hole 12 is not communicated with the hydraulic loop 13, so that the dry type return mechanism 6 is prevented from polluting oil due to falling of a plating layer and the like, and the pollution degree grade of the oil is prevented from not meeting the standard requirement; the screwing planes of the cylinder seat 1, the oil filler pipe mouth 7 and the cleaning filler pipe mouth 9 are not sprayed with paint, so that the oil pollution degree grade is not in accordance with the standard requirement due to the fact that the paint is brought into a hydraulic loop 13 during screwing the threads. Cleaning filler necks 9 are symmetrically arranged at two sides of the cylinder seat 1, and the cleaning filler necks 9 are communicated with a hydraulic circuit 13; when not cleaning, the cleaning filler neck 9 is sealed by the plugging cover 8; during cleaning, any cleaning filler neck 9 at two sides is connected with an external cleaning interface, and oil liquid is led to the opposite side from the left side or the right side; the clean oil continuously cleans the hydraulic loop 13 and the hydraulic cavity 11 and takes away the oil which does not reach the standard; the symmetrically arranged cleaning filler neck 9 is convenient for all crude oil in the hydraulic loop 13 and the hydraulic cavity 11 to be discharged, and prevents the pollution degree grade of the oil from not meeting the standard requirement.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the foregoing, the description is not to be taken in a limiting sense.
Claims (9)
1. A cylinder block assembly for preventing oil pollution is characterized in that: the cylinder comprises a cylinder seat and hydraulic cavities arranged on the cylinder seat, wherein the hydraulic cavities are uniformly distributed on the same circular track, and pistons are arranged in the hydraulic cavities; dry-type return mechanisms are arranged between the adjacent hydraulic cavities and are uniformly distributed on the same circular track; the dry type return mechanism is connected with a compression ring, and the piston can push the compression ring to move towards the direction away from the cylinder seat; the cylinder seat is provided with a mounting blind hole, the dry-type return mechanism is arranged in the mounting blind hole and comprises a return spring and a pull rod, the opening direction of the mounting blind hole is opposite to the moving-out direction of the piston, the bottom of the mounting blind hole is provided with a through hole, one end of the pull rod is connected with the compression ring, and the other end of the pull rod penetrates through the through hole and is in contact connection with the other end of the return spring.
2. The oil contamination resistant cylinder block assembly of claim 1, wherein: the inner wall of the hydraulic cavity is provided with a combined sealing ring, the combined sealing ring comprises a rubber sealing ring and a polytetrafluoroethylene ring, the rubber sealing ring is statically sealed with the hydraulic cavity, the polytetrafluoroethylene ring is dynamically sealed with the piston, the cross section of the rubber sealing ring is O-shaped, the cross section of the polytetrafluoroethylene ring is L-shaped, and the O-shaped clamp is placed on the inner side of the L-shaped and is statically sealed with the L-shaped.
3. The cylinder block assembly resistant to oil contamination of claim 2, further comprising: the opening part of hydraulic pressure chamber is provided with one-level step and second grade step, the combination sealing washer sets up in second grade step department, one-level step department is provided with solid fixed ring.
4. The cylinder block assembly resistant to oil contamination of claim 2 or 3, characterized in that: and a heat insulation pad is arranged between the piston and the compression ring, and the piston is not in contact with the compression ring.
5. The cylinder block assembly resistant to oil contamination of claim 4, wherein: the hydraulic circuit is a square loop and is communicated with an oil liquid filler neck, and the vertex intersection point of the square loop is communicated with the hydraulic cavity.
6. The cylinder block assembly resistant to oil contamination of claim 5, wherein: the square loop is communicated with a cleaning filler neck, and the direction of the cleaning filler neck faces to the lower oblique direction.
7. A method of preventing fluid contamination in a fluid contaminated cylinder block assembly, comprising: applying the cylinder block assembly as claimed in any one of claims 1 to 6, a piston and a dry-type return mechanism are arranged on the cylinder block; when the piston is filled with oil, the piston pushes the compression ring to move axially away from the cylinder seat; when the piston drains oil, the dry-type return mechanism drives the compression ring to reset; the pistons communicate through a hydraulic circuit.
8. The method for protecting a cylinder block assembly against oil and liquid contamination according to claim 7, wherein: the hydraulic circuit is connected with an oil filler neck, the oil filler neck is made of steel materials, and the cylinder seat is made of aluminum materials.
9. The method of claim 8, further comprising: cleaning the hydraulic circuit by using alcohol before assembly, and blowing the hydraulic circuit clean by using high-pressure gas; after assembly, the piston is made to act continuously, and the hydraulic circuit is cleaned continuously by using clean oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110190676.1A CN112744350B (en) | 2021-02-18 | 2021-02-18 | Cylinder seat assembly capable of preventing oil liquid pollution and method for preventing oil liquid pollution |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110190676.1A CN112744350B (en) | 2021-02-18 | 2021-02-18 | Cylinder seat assembly capable of preventing oil liquid pollution and method for preventing oil liquid pollution |
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| CN112744350A CN112744350A (en) | 2021-05-04 |
| CN112744350B true CN112744350B (en) | 2022-12-27 |
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|---|---|---|---|---|
| CN205801505U (en) * | 2016-07-12 | 2016-12-14 | 北京北摩高科摩擦材料有限责任公司 | A kind of cylinder seat assembly for main airplane wheel brake gear |
| CN207161712U (en) * | 2017-08-09 | 2018-03-30 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of novel piston rod double-channel sealing structure |
| CN207860438U (en) * | 2017-12-04 | 2018-09-14 | 贵州新安航空机械有限责任公司 | A kind of reducing piston coordinated type automatic resetting mechanism |
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|---|---|
| CN112744350A (en) | 2021-05-04 |
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