CN111779724B - Hydraulic integrated valve block for aviation electro-hydrostatic actuating system - Google Patents
Hydraulic integrated valve block for aviation electro-hydrostatic actuating system Download PDFInfo
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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
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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
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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
Abstract
The invention provides a hydraulic integrated valve block for an aviation electro-hydrostatic actuating system, which comprises a valve block body, an oil pipe channel and an orifice structure, wherein the valve block body is made of a light material by using an additive manufacturing process and follows the minimum volume principle; the oil pipe channel is formed by adopting a B-spline curve, and is formed with the valve block body simultaneously by using an additive manufacturing process; the orifice structure is formed together with the valve block body and the oil pipe channel by adopting an additive manufacturing process, and is a circular orifice structure; the connection mode of the oil pipe channel and the orifice structure is tangential smooth connection; the direction of the oil pipe channel is changed smoothly without a right-angle structure; the orifice structure is a straight hole, and the inner wall of the orifice structure is vertical to the surface of the valve block body. The invention adopts the additive manufacturing forming process to replace the traditional process for forming the valve block body and the internal flow passage structure thereof, effectively solves the technical problems of large pressure loss of a complex pipeline, complex design process and the like, has the advantages of small pressure loss, simple preparation and wide application range, and effectively lightens the weight of the hydraulic integrated valve block.
Description
Technical Field
The invention relates to the technical field of hydraulic transmission, in particular to a hydraulic integrated valve block for an aviation electro-hydrostatic actuating system.
Background
The hydraulic valve belongs to an automation element commonly used in industry and controlled by pressure, is mainly controlled by internal pressure oil when working, can be controlled by a water and electricity pipeline at a relatively long distance by matching with a pressure distribution valve, and is mainly of two types, namely a direct-acting type and a pilot type, which are common in the market at present. The hydraulic valve is mainly used for controlling the pressure and the flow direction of liquid in a hydraulic system, and the pressure and the flow direction can be accurately controlled when the hydraulic valve is controlled. The hydraulic valve has the working principle that the relative movement of the valve core in the valve body is utilized to control the on-off of the valve port and the size of the opening so as to realize the control of pressure, flow and direction. The hydraulic control valves can be classified into three categories, namely, directional control valves, pressure control valves and flow control valves according to their functions, and can be classified into ordinary hydraulic control valves, servo control valves and proportional control valves according to different control modes. The hydraulic valve can be divided into a plurality of types such as a tubular type, a plate type and a plug-in type according to different installation forms.
The integrated hydraulic valve block integrally installs a plurality of hydraulic valves on a metal block, and integration and standardization of a hydraulic system are realized. The design and installation of the hydraulic system are simplified on the basis of realizing the preset function, the manufacturing cost is reduced, and the application range is very wide. With the increase of the complexity and the integration of the hydraulic system, higher requirements are put on the design of the hydraulic integrated valve block.
The existing hydraulic integrated valve block is usually manufactured by using an integral forging piece through machining processes such as milling, drilling, grinding, surface treatment and the like, has certain requirements on internal structures of materials, and cannot have the defects of an interlayer, sand holes and the like. The valve block is a key component of an integrated hydraulic system, and is a bearing carrier of other hydraulic elements and a channel body for communicating oil passages of the other hydraulic elements. The valve block body is generally in a rectangular parallelepiped shape, and the material is generally aluminum or malleable cast iron. The valve block body is distributed with mounting holes, oil through holes, connecting screw holes, positioning pin holes, common oil holes, connecting holes and the like which are related to the hydraulic valve, and process holes are sometimes arranged for ensuring the correct communication of the pore passages without interference. Typically, a relatively simple valve block has at least 40-60, and a few hundred more complex, channels forming a criss-cross network of channels. The pore canal on the valve block body has various forms such as unthreaded hole, shoulder hole, screw hole, and generally is straight hole, is convenient for process on ordinary drilling machine and digit control machine tool. Inclined holes are sometimes provided for special communication requirements, but are rarely used. The oil path channel inside the existing hydraulic valve block body is realized by drilling, and a control channel and a three-dimensional inclined hole which are connected in a complex way are prevented from being arranged in the valve block body as much as possible during design, and an inclined channel is prevented from being adopted. When the inclined hole is required to be arranged, the inclined angle of the hole channel does not exceed 35 degrees so as to avoid the influence on the sealing of the oil port due to the oval hole opening caused by inclined hole machining.
The hydraulic integrated valve block machined based on the design requirements generally has the following problems:
1. based on the general requirements of hydraulic components, the valve body should avoid or reduce the phenomena of air holes, sand holes or interlayers as much as possible, the existing hydraulic integrated valve block usually adopts a metal block (generally nodular cast iron, 35 steel, 45 steel or aluminum alloy) as a blank, and is usually manufactured by casting, forging and pressing and other processes, and the defects are inevitably generated in the manufacturing process. The inspection work of the pressure resistance of the assembled product is difficult to carry out, so that the qualification rate of the product cannot be ensured. In addition, along with the continuous change of pressure load, the defect that hydraulic manifold block exists can cause the function loss because of inside seepage at any time, has the potential safety hazard.
2. When machining an oil pipe passage, the oil pipe passage and the orifice structure are drilled from the periphery of the blank to the center thereof, and the required circulation paths may be quite complicated in design and arrangement, causing a problem that the machining process is complicated; and secondly, the machining difficulty is further increased for the holes with higher machining requirements, the rejection rate is higher, and the manufacturing cost is improved.
3. Based on the general knowledge of machining and drilling, a drill bit is perpendicular to a machined base surface as much as possible so as to reduce machining difficulty, the machining requirements enable the existing hydraulic integrated valve block to be vertically connected in the design of an internal pipeline as much as possible, and therefore the problems that the pipeline design is complex and difficult, the space utilization rate is low, the vertically connected pipeline is not the best design for avoiding turbulence and reducing pressure loss, large flash burrs are easily generated at the intersecting position of the pipeline, particularly, a deep hole with a small pipe diameter is not effectively detected and cleared, and the function loss or damage of a hydraulic element can be caused by the fact that the uncleared flash burrs fall off in application.
4. Many additional process drilling holes are needed at the places where the through holes need to be turned, and the drilling holes need to be sealed by sealing plugs, so that the problems that the structure is complex, the resistance loss is increased, and the risk of hydraulic oil leakage is further increased are caused.
Disclosure of Invention
According to the technical problems of large mass, large pressure loss and complex pore channel processing of the hydraulic integrated valve block processed by the traditional process, the hydraulic integrated valve block for the aviation electro-hydrostatic actuating system is provided. The invention mainly utilizes the additive manufacturing forming process to replace the traditional process for forming the valve block body and the internal flow passage structure thereof, thereby effectively solving the technical problems of large pressure loss of a complex pipeline, complex design process and the like, having the advantages of small pressure loss, simple preparation and wide application range, and effectively reducing the weight of the hydraulic integrated valve block.
The technical means adopted by the invention are as follows:
a hydraulic integrated valve block for an aviation electro-hydrostatic actuating system comprises a valve block body, an oil pipe channel arranged in the valve block body and an orifice structure arranged on the surface of the valve block body and communicated with the oil pipe channel,
the valve block body is made of light materials, and the selective laser melting technology of the material increase manufacturing technology is utilized to circularly work according to the steps of powder laying, laser sintering, substrate descending and powder laying again, so that the valve block body is accumulated layer by layer, the integral forming of the valve block body is finally completed, and the volume minimum principle is followed;
the valve block body is finally formed into a cuboid, three oil pipe channels are arranged in the valve block body, namely a first oil pipe channel, a second oil pipe channel and a third oil pipe channel, and inlets of the three oil pipe channels are connected with the three-port motor pump and are positioned on the motor pump mounting surface;
the three oil pipe channels are designed and formed by taking a B-spline curve as an outer contour shape and are formed with the valve block body simultaneously by using an additive manufacturing process, the freedom degree of the oil pipe channels is high, and no redundant forming process hole oil pipe channels exist;
the three oil pipe passages are different in length, the length of the first oil pipe passage is smaller than that of the second oil pipe passage, and the length of the second oil pipe passage is smaller than that of the third oil pipe passage;
the inlet and the outlet of the first oil pipe channel are respectively a first oil inlet and a first working oil outlet, and the first working oil outlet is connected with a rod cavity of the actuating cylinder; an inlet and an outlet of the second oil pipe channel are respectively a second oil inlet and a second working oil outlet, and the second working oil outlet is connected with the high-pressure valve block; the third oil pipe channel is provided with two branches, namely a first branch and a second branch, an inlet of the third oil pipe channel is a third oil inlet, an overflow valve, a one-way valve and a filter are integrated inside an outlet side of the first branch, an outlet of the first branch is positioned on the motor pump mounting surface, and the shape of the oil pipe channel of the first branch is not optimized due to the complex internal structure; an outlet of the second branch is a third working oil outlet, and the third working oil outlet is connected with the high-pressure valve block;
the orifice structure is formed together with the valve block body and the oil pipe channel by adopting an additive manufacturing process, and is a circular orifice structure;
the oil pipe channel and the orifice structure are connected in a tangent smooth manner; the direction of the oil pipe channel is changed gently, and a B spline curve is adopted for transition treatment, so that a right-angle structure is avoided; the orifice structure is a straight hole, the inner wall of the orifice structure is vertical to the surface of the valve block body, and an oval orifice caused by an inclined hole structure is avoided, so that the sealing of an oil port is influenced; the three points effectively avoid great local pressure loss caused by sudden change of direction when the hydraulic oil begins to enter the oil pipe channel.
Furthermore, the light material is an aluminum alloy material, so that the weight of the hydraulic valve block is effectively reduced.
Further, the size of the oil pipe passage is determined by the maximum working flow passing through the passage and the allowed maximum working fluid flow rate.
Further, the orifice structure is free of process holes, reducing the risk of leakage.
Compared with the prior art, the invention has the following advantages:
1. the hydraulic integrated valve block for the aviation electro-hydrostatic actuating system is formed by adopting an additive manufacturing process, is simple in process, simple to prepare, flexible in structural layout and capable of reducing pressure loss; and the light material is adopted, so that the overall weight of the valve block body is reduced. On the basis of realizing the preset function of the hydraulic integrated valve block, an aluminum alloy material is selected, and an additive manufacturing process is adopted, so that the shape of a traditional internal oil pipe channel is changed, and the integral optimization of the hydraulic integrated valve block is realized.
2. The hydraulic integrated valve block for the aviation electro-hydrostatic actuating system provided by the invention is processed through an additive manufacturing process on the basis of realizing the function of the hydraulic integrated valve block, and has the characteristics of small pressure loss and light weight.
3. According to the hydraulic integrated valve block for the aviation electro-hydrostatic actuating system, provided by the invention, the oil pipe channel is formed by using a B-spline curve, so that a fabrication hole and a small-angle transition flow passage are avoided, and the sealing effect of an oil port is ensured. Compared with the traditional flow passage, the flow passage has the advantages that the local resistance loss generated at the corner of the oil pipe passage is reduced, the total length of the flow passage is shortened, and the on-way resistance loss of the oil pipe passage is reduced.
4. According to the hydraulic integrated valve block for the aviation electro-hydrostatic actuating system, when an oil pipe channel of the connection hole structure part in the valve block body is designed, the oil pipe channel is perpendicular to an installation surface as much as possible, an oval oil port generated by a large-angle inclined hole is avoided, and the oil port sealing effect is ensured. The turn of the oil pipe channel is as gentle as possible, the direction mutation is avoided, and the whole occupied volume of the oil pipe channel is as small as possible. The oil pipe channel is formed by adopting an additive manufacturing process, the freedom degree of the flow channel is high, no excess forming process hole flow channel exists, and the local resistance loss generated at the corner of the traditional flow channel is avoided.
5. The hydraulic integrated valve block for the aviation electro-hydrostatic actuating system provided by the invention has an orifice structure without a fabrication hole, so that the leakage risk is reduced.
In conclusion, the technical scheme of the invention can solve the problems of large mass, large pressure loss and complex channel processing of the hydraulic integrated valve block processed by the traditional process.
Based on the reasons, the invention can be widely popularized in the fields of hydraulic transmission and the like.
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 description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a hydraulic integrated valve block for an avionics hydrostatic actuator system (EHA) according to the present invention.
Fig. 2 is a schematic structural diagram of an aviation hydraulic integrated valve block manufactured by a conventional processing technology.
Fig. 3 is a schematic structural view of an oil pipe passage provided inside a valve block according to the present invention.
Fig. 4 is a schematic structural diagram of an oil pipe passage in which an integrated aviation hydraulic valve block manufactured by a conventional machining process is arranged.
In the figure: 1. a valve block body; 2. a first tubing passage; 3. a second tubing passage; 4. a third oil pipe passage; 5. an orifice structure; 51. a first oil inlet; 52. a second oil inlet; 53. a third oil inlet; 54. a first working oil outlet; 55. a second working oil outlet; 56. and a third working oil outlet.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1 and 3, the invention provides a hydraulic integrated valve block for an avionic hydrostatic actuating system, which comprises a valve block body 1, an oil pipe channel arranged inside the valve block body 1, and an orifice structure 5 arranged on the surface of the valve block body 1 and communicated with the oil pipe channel, wherein the orifice structure 5 is a cavity which is matched with other parts such as a valve, a sensor, an actuating element, a pump, an oil tank and a flange and needs to be sealed.
The valve block body 1 is made of light materials, and the selective laser melting technology of the material increase manufacturing technology is utilized to circularly work according to the steps of powder laying, laser sintering, substrate descending and powder laying again, so that the accumulation layer by layer is realized, the integral forming of the valve block body 1 is finally completed, and the principle of minimum volume is followed. The light material is an aluminum alloy material, and the valve block body 1 is made of the aluminum alloy material, so that the weight of the hydraulic valve block is effectively reduced.
The valve block body 1 is finally formed into a cuboid, three oil pipe passages are arranged in the valve block body, namely a first oil pipe passage 2, a second oil pipe passage 3 and a third oil pipe passage 4, and inlets of the three oil pipe passages are all connected with a three-port motor pump and are all located on the motor pump mounting surface.
The three oil pipe channels are optimally designed and formed by taking a B-spline curve as an outer contour shape and are formed with the valve block body 1 simultaneously by an additive manufacturing process, the oil pipe channels have high degree of freedom, no redundant forming process holes are formed, and local resistance loss generated at the corners of the traditional flow channel is avoided. The oil pipe channel is designed with great attention, an oval oil port generated by a large-angle inclined hole is avoided, the sealing effect of the oil port is guaranteed, and the size of the oil pipe channel is determined by the maximum working flow flowing through the channel and the allowed maximum working fluid flow rate. The oil pipe passage is divided into a main oil pipeline and an execution oil pipeline according to purposes, the main oil pipeline is used for connecting a hydraulic valve and a hydraulic oil source, and the execution oil pipeline is used for connecting the hydraulic valve and a hydraulic execution element.
The three oil pipe passages are different in length, the length of the first oil pipe passage 2 is smaller than that of the second oil pipe passage 3, and the length of the second oil pipe passage 3 is smaller than that of the third oil pipe passage 4.
The inlet and the outlet of the first oil pipe channel 2 are respectively a first oil inlet 51(P1) and a first working oil outlet 54(A1), and the first working oil outlet 54 is connected with a rod cavity of the actuator cylinder; an inlet and an outlet of the second oil pipe channel 3 are respectively a second oil inlet 52(P2) and a second working oil outlet 55(A2), and the second working oil outlet 55 is connected with the high-pressure valve block; the third oil pipe passage 4 is provided with two branches, namely a first branch and a second branch, an inlet of the third oil pipe passage 4 is a third oil inlet 53(P3), an overflow valve, a one-way valve and a filter are integrated inside an outlet side of the first branch, an outlet of the first branch is positioned on the motor pump mounting surface, and the shape of the oil pipe passage of the first branch is not optimized due to the complex internal structure; the outlet of the second branch is a third working oil outlet 56(B), and the third working oil outlet 56 is connected with the high-pressure valve block.
The first oil inlet 51, the second oil inlet 52 and the third oil inlet 53 are all connected with the three-port motor pump and are all positioned on the motor pump mounting surface.
And the oil pipe channel adopts a B spline curve to perform transition treatment on a right-angle area of the original integrated valve block.
The orifice structure 5 is formed together with the valve block body 1 and the oil pipe channel by adopting an additive manufacturing process, and the orifice structure 5 is a circular orifice structure. Wherein the porthole structure 5 is free of process holes, reducing the risk of leakage. The orifice structure 5 is a plurality of orifices, and includes a first oil inlet 51, a second oil inlet 52, a third oil inlet 53, a first working oil outlet 54, a second working oil outlet 55, a third working oil outlet 56, and process holes required for machining.
The oil pipe channel is connected with the orifice structure 5 in a tangent smooth connection mode, so that an oval oil port caused by an inclined hole (particularly a large-angle inclined hole) is avoided, and the sealing effect of the oil port is ensured; the direction of the reversing position of the oil pipe channel is changed gently, B-spline curve transition processing is adopted, a right-angle structure is avoided, direction mutation is avoided, and the whole occupied volume of the oil pipe channel is as small as possible. The orifice structure 5 is a straight hole, and the inner wall of the orifice structure is vertical to the surface of the valve block body 1. The three points can effectively avoid great local pressure loss caused by sudden change of direction when hydraulic oil begins to enter the oil pipe channel.
As shown in fig. 2, the hydraulic integrated valve block processed by the conventional processing technology is an orifice structure which is arranged on the surface of the valve block body and communicated with an oil pipe channel, and comprises three oil inlets P1, P2 and P3 for connecting a three-port motor pump, two working oil outlets a1 and a2 for connecting a rod cavity of an actuator cylinder and other valve blocks, a working oil outlet B for connecting other valve blocks, and a process hole required by processing. The valve block integrates a check valve, an overflow valve and a filter into a branch flow passage of an oil pipe passage where the P3 is located.
As shown in fig. 1, compared with a hydraulic integrated valve block processed by a traditional processing technology, the hydraulic integrated valve block provided by the invention has the advantages that no process hole is formed, the structure of the valve block is simplified, the resistance loss is greatly reduced, the process hole does not need to be sealed, and the risk of leakage of hydraulic oil is reduced. In addition, the material increase manufacturing adopts light material to form, reduces valve block quality.
As shown in fig. 4, in the hydraulic integrated valve block processed by the conventional processing technology, oil pipe channels are all linear pipelines, and corners are all right angles. The orifice structure, the mutually communicated holes are orthogonal.
As shown in FIG. 3, an oil pipe channel on the hydraulic integrated valve block is designed by applying a B-spline theory, so that a small-angle transition flow channel is avoided. In addition, the material increase manufacturing process is adopted for forming, so that machining traces left by the drill during drilling machining are avoided, and the local resistance loss is reduced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A hydraulic integrated valve block for an aviation electro-hydrostatic actuating system comprises a valve block body (1), an oil pipe channel arranged in the valve block body (1) and an orifice structure (5) arranged on the surface of the valve block body (1) and communicated with the oil pipe channel,
the valve block body (1) is made of light materials, and the selective laser melting technology of the material increase manufacturing process is utilized to circularly work according to the steps of powder laying, laser sintering, substrate descending and powder laying again to be accumulated layer by layer, so that the integral forming of the valve block body (1) is finally completed, and the principle of minimum volume is followed;
the valve block body (1) is finally formed into a cuboid, three oil pipe channels are arranged in the valve block body, namely a first oil pipe channel (2), a second oil pipe channel (3) and a third oil pipe channel (4), and inlets of the three oil pipe channels are connected with the three-port motor pump and are located on a motor pump mounting surface;
the three oil pipe channels are designed and formed by taking a B-spline curve as an outer contour shape and are formed simultaneously with the valve block body (1) by an additive manufacturing process, the oil pipe channels have high degree of freedom and no redundant forming process holes;
the lengths of the three oil pipe passages are different, the length of the first oil pipe passage (2) is smaller than that of the second oil pipe passage (3), and the length of the second oil pipe passage (3) is smaller than that of the third oil pipe passage (4);
an inlet and an outlet of the first oil pipe channel (2) are respectively a first oil inlet (51) and a first working oil outlet (54), and the first working oil outlet (54) is connected with a rod cavity of the actuating cylinder; an inlet and an outlet of the second oil pipe channel (3) are respectively a second oil inlet (52) and a second working oil outlet (55), and the second working oil outlet (55) is connected with the high-pressure valve block; the third oil pipe channel (4) is provided with two branches, namely a first branch and a second branch, an inlet of the third oil pipe channel (4) is a third oil inlet (53), an overflow valve, a one-way valve and a filter integrated part are arranged inside an outlet side of the first branch, an outlet of the first branch is positioned on the motor pump mounting surface, and the shape of the oil pipe channel of the first branch is not optimized due to the complex internal structure; an outlet of the second branch is a third working oil outlet (56), and the third working oil outlet (56) is connected with the high-pressure valve block;
the orifice structure (5) is formed together with the valve block body (1) and the oil pipe channel by adopting an additive manufacturing process, and the orifice structure (5) is a circular orifice structure;
the oil pipe channel and the orifice structure (5) are connected in a tangent smooth manner; the direction of the oil pipe channel is changed gently, and a B spline curve is adopted for transition treatment, so that a right-angle structure is avoided; the orifice structure (5) is a straight hole, the inner wall of the orifice structure is perpendicular to the surface of the valve block body (1), and therefore large local pressure loss caused by sudden change of direction when hydraulic oil enters the oil pipe channel is effectively avoided.
2. The hydraulic integrated valve block for the avionic hydrostatic actuating system according to claim 1, characterized in that the light material is an aluminum alloy material, which effectively reduces the weight of the hydraulic valve block.
3. The hydrostatic integrated valve block for the avionics hydrostatic actuation system according to claim 1, characterized in that the size of the oil line channel is determined by the maximum working flow passing through the channel and the maximum flow rate of the working fluid allowed.
4. The integrated hydraulic valve block for an avionic hydrostatic actuation system according to claim 1, characterized in that the orifice structure (5) is free of fabrication holes, reducing the risk of leaks.
Priority Applications (1)
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| CN112983912A (en) * | 2021-02-04 | 2021-06-18 | 佛山宇仁智能科技有限公司 | Additive manufactured oil circuit block and manufacturing method thereof |
| CN113127991B (en) * | 2021-04-23 | 2024-03-01 | 江苏徐工工程机械研究院有限公司 | Hydraulic valve block and lightweight design method thereof |
| CN113202828B (en) * | 2021-04-28 | 2023-02-28 | 贵州航天天马机电科技有限公司 | Hydraulic oil source system of four-foot robot |
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| CN100559163C (en) * | 2007-06-05 | 2009-11-11 | 华南理工大学 | Double-path resonance enhanced laser guidence breakdown spectral trace element analyser and method |
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