Nested antler channel and servo valve

Abstract

The invention provides a nested antler channel and a servo valve, and relates to the technical field of servo valves.The nested antler channel is provided with a plurality of antler fluid channels, each antler fluid channel comprises a main branch used for being connected with hydraulic equipment, the main branch is connected with a plurality of first branches, the first branches are connected with a plurality of second branches, and the second branches are connected with a plurality of auxiliary fluid channels. The second branches are used for communicating with the corresponding through holes; according to the nested antler channel and the servo valve, the nested antler channel is provided with a plurality of antler fluid channels, different hydraulic oil passages are circulated through the antler fluid channels, meanwhile, hydraulic oil can be evenly divided into a plurality of strands through the first branch and the second branch to be communicated with the corresponding through holes, the valve element is evenly stressed, and driving is more stable.

Description

Technical Field

[0001] The present application relates to the technical field of servo valves, and in particular to a nested antler channel and a servo valve. Background Art

[0002] The servo valve is a key electro-hydraulic control component widely used in aerospace, machinery manufacturing, industrial automation, and other fields. It converts electrical signals into hydraulic output, enabling precise control of position, speed, and force. The performance of the servo valve directly affects the accuracy and response speed of the entire control system. Currently, the most common servo valves on the market include electro-hydraulic servo valves, proportional servo valves, and direct-drive servo valves.

[0003] The flow channel used in the existing servo valve is unstable when the flow rate or pressure is large or the response frequency is high. Summary of the Invention

[0004] The main purpose of this application is to provide a nested antler channel and servo valve, aiming to solve the defect of unstable driving of the existing servo valve flow channel when the flow rate, pressure or response frequency is large.

[0005] To achieve the above-mentioned purpose, the present application provides a nested antler channel, which is used to connect hydraulic equipment and a valve assembly. The valve assembly includes a valve core and a valve sleeve. The valve sleeve is provided with multiple groups of through holes along the axial direction of the valve sleeve for communicating with the nested antler channel. The nested antler channel is provided with a plurality of antler fluid channels, each of the antler fluid channels includes a main branch for connecting to the hydraulic equipment, the main branch is connected to a plurality of first branches, the first branches are connected to a plurality of second branches, and the second branches are used to connect to the corresponding through holes.

[0006] Preferably, the cross-sectional area of ​​the main branch is greater than or equal to the sum of the cross-sectional areas of the corresponding first branches, and the cross-sectional area of ​​the first branch is greater than or equal to the sum of the cross-sectional areas of the corresponding second branches.

[0007] Preferably, the valve sleeve is axially arranged with X groups of through holes, and each group of through holes includes Y pairs of slots distributed radially along the valve sleeve; wherein the range of X is 3-20, and the range of Y is 1-15.

[0008] Preferably, assuming that the cross-sectional area of ​​the main branch is S, then S≥K1*h*b*Y; wherein K1 is a multiple and ranges from 2 to 16, h is the moving distance of the valve core, and b is the width of the slot; Assuming that the difference in cross-sectional area between the annular sleeve and the valve core is ΔS, then ΔS≥K2*h*b*Y; wherein K2 is a multiple, and K2 is 2-10.

[0009] Preferably, the valve core can conduct the through holes in group A when it slides to the left limit position inside the valve sleeve, and can conduct the through holes in group B when it slides to the right limit position inside the valve sleeve; wherein the ranges of A and B are both 2~(X-1).

[0010] Preferably, the shape of the slot is at least one of waist-shaped, circular, polygonal, star-shaped or irregular.

[0011] Preferably, an accommodating cavity for accommodating the valve sleeve is provided in the nested antler channel, and a mounting port communicating with the accommodating cavity is provided on one side of the nested antler channel, and a sealing cover is detachably connected to the mounting port; The fitting clearance between the valve sleeve and the accommodating cavity is -20~20 μm.

[0012] Preferably, the inner portion of the surrounding solid portion of the nested antler channel is a lattice structure; The lattice structure is any one of a rod-shaped lattice, a plate-shaped lattice or a continuous curved surface lattice.

[0013] Preferably, the antler fluid channels are provided in four groups, namely, antler fluid channel E, antler fluid channel O, antler fluid channel Y1 and antler fluid channel Y2; wherein the antler fluid channel E has one main branch, eight first branches and sixteen second branches, the antler fluid channel O has one main branch, four first branches and sixteen second branches, and the antler fluid channel Y1 and the antler fluid channel Y2 each have one main branch, two first branches and eight second branches; the main branch of the antler fluid channel E is used to connect to the hydraulic pump, the main branch of the antler fluid channel O is used to connect to the oil source, and the antler fluid channel Y1 and the antler fluid channel Y2 are respectively connected to the oil inlet and the oil return port of the hydraulic equipment; The valve sleeve is provided with two groups of through holes a, one group of through holes b, one group of through holes c and two groups of through holes d. Each group of through holes a has 8 slots, which are respectively connected to the second branches corresponding to the antler fluid channel E. The through holes b and the through holes c both have 8 slots, which are respectively connected to the corresponding second branches of the antler fluid channel Y1 and the antler fluid channel Y2. Each group of through holes d has 8 slots, which are respectively connected to the second branches of the antler fluid channel O.

[0014] The present application also provides a servo valve comprising the nested antler channel as described above.

[0015] The beneficial effects that can be achieved by the present application are as follows: the nested antler channel is provided with multiple antler fluid channels, which circulate different hydraulic oil passages respectively. At the same time, the hydraulic oil can be evenly divided into multiple streams and connected to the corresponding through holes through the first branch and the second branch, so that the valve core is evenly stressed and the drive is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0017] Figure 1 A schematic flow chart of a servo valve design method in an embodiment of the present application; Figure 2 This is a schematic diagram of the explosion structure of a servo valve in an embodiment of the present application; Figure 3 This is a schematic diagram of the internal structure of a servo valve in an embodiment of the present application; Figure 4 This is a schematic diagram of the outer surface structure of a servo valve in an embodiment of the present application; Figure 5 Schematic diagram of the explosion structure of the valve assembly in the embodiment of the present application; Figure 6 Schematic diagram of the assembly structure of the valve assembly in the embodiment of the present application; Figure 7 Schematic diagram of the cross-sectional structure of the valve assembly in the embodiment of the present application; Figure 8 Schematic diagram of the connection structure of the rotary valve stem, crankshaft and support shaft in the embodiment of the present application; Figure 9 Schematic diagram of the structure of the valve sleeve in the embodiment of the present application; Figure 10 This is a schematic diagram of the structure of the antler fluid channel nested inside the antler channel in an embodiment of the present application; Figure 11 To correspond Figure 9 Schematic diagram of the structure of the fluid channel in the middle antler from another perspective; Figure 12 Schematic diagram of the working principle of each antler fluid channel (after disassembly) and hydraulic equipment; Figure 13 Schematic diagram of the connection structure between the outer shell and the heat dissipation layer in an embodiment of the present application; Figure 14 Schematic diagram of the structure of the rod-shaped lattice in the embodiment of the present application; Figure 15 Schematic diagram of the structure of the plate lattice in the embodiment of the present application; Figure 16 Schematic diagram of the structure of the continuous curved surface lattice in the embodiment of the present application; Figure 17 Schematic diagram of another structure of the rod-shaped lattice in the embodiment of the present application.

[0018] Reference numerals: 110-outer shell, 120-valve assembly, 121-rotating valve stem, 122-valve core, 1221-waist-shaped mounting hole, 1222-annular sleeve, 123-valve sleeve, 1231-slot hole, 1232-movable slot, 124-crankshaft, 125-first bearing, 126-support shaft, 127-second bearing, 128-third bearing, 130-nested antler channel, 131-main branch, 132-first branch, 133-second branch, 140-sealing cover, 150-electric motor, 160-circuit board, 170-radiator, 180-limit block, 190-heat dissipation layer.

[0019] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0021] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0022] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0024] Reference Figure 2-Figure 17 This embodiment also provides a servo valve, which is designed based on the above-mentioned servo valve design method. The servo valve includes an outer shell 110, in which a valve assembly 120 is provided. The valve assembly 120 is connected to a nested antler channel 130, and the nested antler channel 130 is used to connect to the hydraulic equipment; wherein the valve assembly 120 includes a rotating valve stem 121, a valve core 122 and a valve sleeve 123, the axis of the rotating valve stem 121 and the axis of the valve core 122 are perpendicular to each other, the valve core 122 is coaxial and movably arranged in the valve sleeve 123, the bottom of the rotating valve stem 121 is connected to a crankshaft 124, the crankshaft 124 is sleeved with a first bearing 125, and the valve sleeve 123 is provided with a first bearing 125. In the nested antler channel 130, a plurality of through holes for communicating with the nested antler channel 130 are provided on the valve sleeve 123 along the axial direction of the valve sleeve 123. A movable groove 1232 is radially provided in the middle part of the valve sleeve 123 to cooperate with the crankshaft 124. A waist-shaped mounting hole 1221 is provided inside the valve core 122 to cooperate with the first bearing 125. The length direction of the waist-shaped mounting hole 1221 is perpendicular to the axial direction of the valve core 122. At least one annular sleeve 1222 is fixedly provided on both sides of the mounting hole on the valve core 122. The annular sleeve 1222 is used to seal the through holes at different positions.

[0025] In this embodiment, during operation, the crankshaft 124 rotates correspondingly by rotating the valve stem 121 forward or reversely. Since the crankshaft 124 is eccentrically arranged relative to the rotating valve stem 121, the first bearing 125 is driven to move leftward or rightward in the waist-shaped mounting hole 1221 inside the valve core 122, thereby pushing the valve core 122 to move leftward or rightward in the valve sleeve 123 accordingly, so that the annular sleeve 1222 on the valve core 122 blocks the through holes at different positions of the valve sleeve 123, thereby forming different passages to control the liquid. The flow rate and direction of the pressurized oil ultimately control the hydraulic equipment to perform corresponding actions. In the process of the crankshaft 124 controlling the movement of the valve core 122, the first bearing 125 can cooperate with the rotation of the crankshaft 124. At the same time, the first bearing 125 avoids the crankshaft 124 from directly acting on the valve core 122, thereby greatly reducing wear and improving service life. The first bearing 125 is always in the waist-shaped mounting hole 1221 of the valve core 122 and is not easy to detach. The structure is compact, firm and stable, meeting the use requirements.

[0026] It should be noted that, since the axis of the crankshaft 124 revolves around the axis of the rotating valve stem 121, the movable groove 1232 can cooperate with the revolution range of the crankshaft 124. When the axis of the crankshaft 124 rotates to the front and rear limit positions, it is just located at the front and rear end positions of the waist-shaped mounting hole 1221 in the length direction. When the axis of the crankshaft 124 rotates to the left and right limit positions, it can drive the valve core 122 to move to the left and right limit positions accordingly, so that the valve core 122 only moves left and right linearly; the first bearing 125 can adopt any one of radial contact bearings, angular contact radial bearings, axial contact bearings or angular contact thrust bearings; the matching clearance between the first bearing 125 and the waist-shaped mounting hole 1221 is 0~20 μm, preferably 0~10 10 μm, the size of the gap here has a greater impact on the control accuracy, and reducing the gap can increase the control accuracy; the diameter of the valve core 122 is 1~100mm, preferably 2~70mm; 2~10 annular sleeves 1222 can be set on the valve core 122, and the wall thickness of the valve sleeve 123 is 0.5~20 mm, preferably 0.6~2 mm; the matching clearance between the annular sleeve 1222 and the valve sleeve 123 is 0~30 μm, preferably 0~10 μm, and the size of the gap here will affect the internal leakage. The smaller the gap, the smaller the leakage. It can be designed according to needs; the outer shell 110 can be formed by laser powder bed melting, electron beam powder bed melting, binder jetting, direct energy deposition, material extrusion, cold spraying, casting, forging or machining. The outer shell 110 can be made of aluminum alloy, titanium alloy, high temperature alloy, stainless steel, mold steel, plastic or composite material, and the surface of the outer shell 110 is sandblasted, electroplated, sprayed, anodized, coated or painted; the valve sleeve 123, the valve core 12 2. The crankshaft 124 can be formed by laser powder bed melting, electron beam powder bed melting, binder jetting, direct energy deposition, stereolithography, injection molding, cold spraying, casting, electromachining or mechanical processing; the valve sleeve 123, valve core 122 and crankshaft 124 can be made of aluminum alloy, titanium alloy, high-temperature alloy, stainless steel, mold steel, ceramic or composite material; the surfaces of the valve sleeve 123, valve core 122 and crankshaft 124 can be subjected to one or more treatments including sandblasting, electroplating, spraying, anodizing, physical vapor deposition, chemical vapor deposition, coating or painting.

[0027] As an optional embodiment, the crankshaft 124 simultaneously moves through the valve sleeve 123 and the valve core 122 and is connected to the support shaft 126. The axis of the support shaft 126 coincides with the axis of the rotating valve stem 121. A second bearing 127 is sleeved on the support shaft 126. The support shaft 126 is movably connected to the bottom of the nested antler channel 130 through the second bearing 127.

[0028] In this embodiment, by designing the crankshaft 124 to pass through the valve sleeve 123 and the valve core 122, the valve core 122 is driven to move through the middle of the crankshaft 124. Compared with driving the valve core 122 through the end of the crankshaft 124, the force applied to the valve core 122 is smaller and the risk of breakage is less likely to occur, thereby further improving the service life. At the same time, the cooperation of the support shaft 126 and the second bearing 127 can support the crankshaft 124 and the rotating valve stem 121, with good operating stability and low wear.

[0029] As an optional embodiment, a third bearing 128 is provided on the rotating valve stem 121, and the third bearing 128 is movably embedded in the top of the nested antler channel 130. The third bearing 128 can rotate in conjunction with the rotating valve stem 121 and support it on the nested antler channel 130 at the same time, thereby further improving the operating stability and reducing wear.

[0030] As an optional embodiment, multiple antler fluid channels are opened in the nested antler channel 130, each antler fluid channel includes a main branch 131 for connecting to the hydraulic equipment, the main branch 131 is connected to a number of first branches 132, the first branches 132 are connected to a number of second branches 133, and the second branches 133 are used to connect to the corresponding through holes.

[0031] In this embodiment, the multiple antler fluid channels opened in the nested antler channel 130 can flow through different hydraulic oil passages respectively. At the same time, the hydraulic oil can be evenly divided into multiple streams and connected to the corresponding through holes through the first branch 132 and the second branch 133, so that the valve core 122 is evenly stressed and the drive is more stable.

[0032] It should be noted that the number of first branches 132 is 1 to 10, and the number of second branches 133 is 2 to 40, which can be designed according to actual needs; the wall thickness of the antler fluid channel is 0.1 to 5 mm, which can be a uniform wall thickness or a non-uniform wall thickness, wherein the non-uniform wall thickness variation ratio is 20% to 80%; the nested antler channel 130 can be formed by laser powder bed melting, electron beam powder bed melting, binder jetting, direct energy deposition, stereolithography, material extrusion, cold spraying or casting; the nested antler channel 130 can be made of aluminum alloy, titanium alloy, high-temperature alloy, stainless steel or mold steel; the surface of the nested antler channel 130 is sandblasted, electroplated, sprayed, anodized or coated; the inner wall of the nested antler channel 130 is subjected to one or more treatments of ultrasonic cleaning, abrasive flow, water particle flow, magnetic grinding, chemical polishing or oil cleaning.

[0033] Several methods for forming the nested antler channel 130 are specifically described below: (1) When the nested antler channel 130 is formed by laser powder bed fusion, the forming method includes the following steps: Step S1: The powder is batched, sieved, dried, and then loaded into a manufacturing environment equipped with a forming platform; Step S2: preheating the forming platform and replacing the manufacturing environment with inert gas; Step S3: spreading powder on the surface of the forming platform, and then scanning and sintering a local area of ​​the powder layer by laser; Step S4: The forming platform descends one layer thickness and repeats step S3 until the three-dimensional nested antler channel 130 is formed.

[0034] (2) When the nested antler channel 130 is formed by electron beam powder bed fusion, the forming method includes the following steps: Step S1: The powder is batched, sieved, dried, and then loaded into a manufacturing environment equipped with a forming platform; Step S2: preheating the forming platform and evacuating the manufacturing environment; Step S3: spreading powder on the surface of the forming platform, and then heating the powder layer area by electron beam scanning; Step S4: Scanning and sintering a local area of ​​the powder layer by electron beam; Step S5: The sintering area is kept warm for a certain period of time, and the forming platform is lowered by one layer thickness; Step S6: Repeat steps S3 to S5 until the three-dimensional nested antler channel 130 is formed.

[0035] (3) When the nested antler channel 130 is formed by adhesive injection molding, the molding method includes the following steps: Step S1: The powder is batched, sieved, dried, and then loaded into a manufacturing environment equipped with a forming platform; Step S2: Spread and compact the powder on the surface of the forming platform, and use a nozzle to spray the binder on the surface of the powder layer according to the cross section of the current layer model to bond the powder particles together to form a solid structure. Step S3: the forming platform descends by one layer thickness, and step S2 is repeated until the three-dimensional nested antler channels 130 are bonded together to form a printed blank; Step S4: The printed blank is solidified by drying or chemical reaction to complete the formation of the three-dimensional nested antler channel 130.

[0036] (4) When the nested antler channel 130 is formed by casting, the forming method includes the following steps: Step S1: melting the casting material to form molten metal; Step S2: pouring the molten metal into the mold, entering the mold cavity through the gate, and filling the entire mold cavity; Step S3: After the metal filling is completed, wait for a certain period of time for the metal to cool and solidify; Step S4: After the casting is completely cooled, the mold is disassembled to complete the formation of the three-dimensional nested antler channel 130.

[0037] As an optional embodiment, the cross-sectional area of ​​the main branch 131 is greater than or equal to the sum of the cross-sectional areas of the corresponding first branches 132, and the cross-sectional area of ​​the first branch 132 is greater than or equal to the sum of the cross-sectional areas of the corresponding second branches 133, thereby preventing flow saturation.

[0038] As an optional embodiment, the valve sleeve 123 is provided with X groups of through holes arranged axially, and each group of through holes includes Y pairs of slots 1231 distributed radially along the valve sleeve 123; wherein, the range of X is 3 to 20, the range of Y is 1 to 15, and the spacing between adjacent groups of through holes is 0 to 10 mm, which can be designed according to actual usage requirements.

[0039] As an optional implementation, assuming that the cross-sectional area of ​​the main branch 131 is S, then S≥K1*h*b*Y; wherein, K1 is a multiple, and K1 is 2~16, h is the moving distance of the valve core 122, and b is the width of the slot 1231; assuming that the difference between the cross-sectional areas of the annular sleeve 1222 and the valve core 122 is ΔS, then ΔS≥K2*h*b*Y; wherein, K2 is a multiple, and K2 is 2~10, thereby preventing flow saturation.

[0040] As an optional embodiment, it is assumed that when the crankshaft 124 rotates forward and drives the valve core 122 to slide to the left limit position inside the valve sleeve 123, the group A through holes can be opened, and when the crankshaft 124 rotates backward and drives the valve core 122 to slide to the right limit position inside the valve sleeve 123, the group B through holes can be opened; wherein, the ranges of A and B are both 2~(X-1), thereby ensuring that a passage can be formed when the valve core 122 moves to the limit position.

[0041] As an optional embodiment, the shape of the slot 1231 is at least one of a waist shape, a circle, a polygon (such as a rectangle, a pentagon, etc.), a star shape or an irregular shape (such as an irregular polygon), and can be designed according to actual needs.

[0042] As an optional embodiment, a housing cavity for accommodating the valve sleeve 123 is provided in the nested antler channel 130, and a mounting port communicating with the housing cavity is provided on one side of the nested antler channel 130. A sealing cover 140 is detachably connected (e.g., threaded or screwed) to the mounting port to facilitate assembly of the valve sleeve 123. After assembly, the sealing cover 140 is installed on the mounting port, thereby fixing the valve sleeve 123 in the nested antler channel 130 to prevent it from moving. It should be noted that the fitting clearance between the valve sleeve 123 and the housing cavity is -20 to 20 µm, preferably -10 to 10 µm. The size of the clearance affects the amount of internal leakage. In principle, the smaller the better, and the selection can be made according to design requirements.

[0043] The assembly method of the valve sleeve 123 and the nested antler channel 130 is as follows: freeze the 3D printed valve sleeve 123 to reduce the size of the valve sleeve 123; embed the valve sleeve 123 into the accommodating cavity of the nested antler channel 130 at room temperature; wait for the valve sleeve 123 to return to room temperature, and complete the interference fit and lossless assembly.

[0044] As an optional embodiment, the internal part of the solid part around the nested antler channel 130 is a lattice structure, and the lattice structure is any one of a rod-shaped lattice, a plate-shaped lattice or a continuous curved surface lattice, so as to achieve the purpose of weight reduction, making the entire servo valve lighter and reducing material costs. The weight reduction ratio can be set according to 0.5%~99.5%.

[0045] It should be noted that the rod-shaped lattice can be configured into a variable density structure (e.g. Figure 17 As shown in Figure 3, a rod-shaped lattice with variable density can be constructed by taking the 3D stress map of the part as input. The stress map can be converted into a material density map. The generated lattice has a higher density in areas with higher stress and a lower density in areas with lower stress, thereby improving the uniformity of stress resistance.

[0046] As an optional embodiment, an electric motor 150 for driving the rotary valve stem 121 to rotate is disposed in the outer shell 110 . The electric motor 150 is electrically connected to a circuit board 160 , and an angular displacement sensor is disposed on the circuit board 160 .

[0047] In this embodiment, the circuit board 160 can drive the electric motor 150 to operate after receiving the signal, and the electric motor 150 can drive the rotary valve stem 121 to rotate, thereby driving the crankshaft 124 to rotate. The angular displacement sensor can collect the current rotation angle of the crankshaft 124 and feed it back to the circuit board 160, compare the difference between the rotation angle of the crankshaft 124 and the input signal in real time, dynamically adjust the rotation speed and position of the crankshaft 124, and realize closed-loop control.

[0048] It should be noted that the diameter of the electric motor 150 is 5~200 mm and the height is 5~200 mm. The electric motor 150 consists of a stator and a rotor. The rotor can form an integrated structure with the rotary valve stem 121. The thermal conductivity of the stator of the electric motor 150 can be increased through a glue filling process; the angular displacement sensor can adopt any one of a capacitive encoder, a photoelectric encoder, a magnetic encoder, a Hall sensor, an inductive sensor, a resistive sensor, a micro-electromechanical system sensor or a laser sensor; the number of layers of the circuit board 160 is 1~20 layers, which can be designed according to requirements; the side wall of the outer shell 110 is provided with a connector for power and signal communication with external equipment.

[0049] As an optional embodiment, a radiator 170 is provided above the circuit board 160. The radiator 170 is located at the top of the outer shell 110. A heat dissipation hole is opened at the top of the outer shell 110. The setting of the radiator 170 and the heat dissipation hole can dissipate heat for the circuit board 160, thereby ensuring that the circuit board 160 can operate efficiently.

[0050] As an optional embodiment, the radiator 170 includes at least one of thermal grease, a cooling fan or a semiconductor cooler, all of which can meet the heat dissipation requirements. Other applicable radiators 170 can also be used.

[0051] As an optional embodiment, the eccentricity of the crankshaft 124 relative to the rotating valve stem 121 is 0.1-20 mm, preferably 0.5-2.5 mm, and can be designed according to actual usage requirements.

[0052] As an optional embodiment, a limit baffle is provided on the inner wall of the outer shell 110, and a limit block 180 is provided on the rotary valve stem 121 to cooperate with the limit baffle to limit the rotation angle of the rotary valve stem 121, thereby limiting the rotation angle of the crankshaft 124. The limited rotation angle of the crankshaft 124 here is 0~180°, preferably 10°~170°.

[0053] As an optional embodiment, at least one heat dissipation layer 190 is provided on the inner wall of the outer shell 110. The material of the heat dissipation layer 190 is any one of thermal conductive gel, pure copper, copper alloy, pure aluminum, aluminum alloy, pure silver or silver alloy. It can dissipate the heat generated by the components inside the outer shell 110 during operation, thereby reducing the failure rate.

[0054] It should be noted that the processing technology of the heat dissipation layer 190 adopts at least one of hot extrusion, direct energy deposition, coating, electroplating, chemical plating, hot dip plating, cold spraying, vapor deposition or thermal spraying; the number of layers of the heat dissipation layer 190 is ≥1, preferably 1 to 5 layers; the single layer thickness of the heat dissipation layer 190 is 0.001 mm to 10 mm, preferably 0.01 mm to 0.5 mm.

[0055] As an optional embodiment, in order to improve the surface strength of the outer shell 110 and the nested antler channel 130, a reinforcing texture can be set on the outer wall of the shell 110 and the nested antler channel 130. The reinforcing texture can adopt at least one of triangular texture, square texture, hexagonal texture, octagonal texture, rhombus dodecahedron texture, double-angle tensile texture, single-angle tensile texture or random texture.

[0056] It should be noted that each sealing part of the servo valve of this embodiment requires a sealing ring. The sealing ring can be composed of an O-ring and a retaining ring. The O-ring can be made of nitrile rubber, hydrogenated nitrile rubber, fluororubber, silicone rubber, EPDM rubber, acrylate rubber, ethylene acrylate rubber, polyester polyurethane rubber or polyether polyurethane rubber, and its hardness is 70~100HA; the retaining ring can be made of polytetrafluoroethylene, nylon 6, or nylon 1010, and its hardness is greater than or equal to 90 HS.

[0057] The working principle of the present application is illustrated below with reference to an example: here, the antler fluid channels can be set up in four groups, namely, antler fluid channel E, antler fluid channel O, antler fluid channel Y1 and antler fluid channel Y2; wherein the antler fluid channel E has one main branch 131, eight first branches 132 and sixteen second branches 133, the antler fluid channel O has one main branch 131, four first branches 132 and sixteen second branches 133, the antler fluid channel Y1 and the antler fluid channel Y2 each have one main branch 131, two first branches 132 and eight second branches 133; the main branch 131 of the antler fluid channel E is connected to the hydraulic pump, and the antler fluid channel The main branch 131 of channel O is connected to the oil source, and the antler fluid channel Y1 and the antler fluid channel Y2 are respectively connected to the oil inlet and oil return port of the hydraulic equipment (such as a hydraulic cylinder); the valve sleeve 123123 is provided with two groups of through holes a, one group of through holes b, one group of through holes c and two groups of through holes d, each group of through holes a has 8 slots 1231, which are respectively connected to the second branches 133 corresponding to the antler fluid channel E, the through holes b and the through holes c both have 8 slots 1231, which are respectively connected to the corresponding second branches 133 of the antler fluid channel Y1 and the antler fluid channel Y2, and each group of through holes d has 8 slots 1231, which are respectively connected to the second branches 133 of the antler fluid channel O. After being assembled correctly according to the above relationship, the antler fluid channel is connected to the through hole of the valve sleeve 123 through the second branch 133 to form a passage. The working process of the servo valve is mainly to calculate the current control signal according to the target position given by the hydraulic system, and transmit it to the servo amplifier after D / A conversion to drive the electric motor 150 to rotate the crankshaft 124 forward or reverse. The angular displacement sensor collects the current rotation angle of the crankshaft 124 and feeds it back to the circuit board 160, compares the difference between the rotation angle of the crankshaft 124 and the input signal in real time, and dynamically adjusts the rotation speed and position of the crankshaft 124 to achieve closed-loop control; by rotating the crankshaft 124 forward and reverse Thereby, the valve core 122 is driven to move in the forward and reverse directions. When the crankshaft 124 rotates forward and drives the valve core 122 to slide to the left inside the valve sleeve 123, the antler fluid channel E and the antler fluid channel Y2 form a passage, and the antler fluid channel O and the antler fluid channel Y1 form a passage, so that the push rod of the actuator in the hydraulic equipment moves to the right. When the crankshaft 124 rotates reverse and drives the valve core 122 to slide to the right inside the valve sleeve 123, the antler fluid channel E and the antler fluid channel Y1 form a passage, and the antler fluid channel O and the antler fluid channel Y2 form a passage, so that the push rod of the actuator moves to the left, thereby realizing the action execution control of the hydraulic equipment.

[0058] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A nested antler channel, characterized by: The nested antler channel is used to connect the hydraulic equipment and the valve assembly, the valve assembly includes a valve core and a valve sleeve, and the valve sleeve is provided with multiple groups of through holes along the axial direction of the valve sleeve for communicating with the nested antler channel; The nested antler channel is provided with a plurality of antler fluid channels, each of the antler fluid channels includes a main branch for connecting to the hydraulic equipment, the main branch is connected to a plurality of first branches, the first branches are connected to a plurality of second branches, and the second branches are used to connect to the corresponding through holes.

2. The nested antler channel according to claim 1, characterized in that: The cross-sectional area of ​​the main branch is greater than or equal to the sum of the cross-sectional areas of the corresponding first branches, and the cross-sectional area of ​​the first branch is greater than or equal to the sum of the cross-sectional areas of the corresponding second branches.

3. The nested antler channel according to claim 1, characterized in that: Assume that the valve sleeve is axially arranged with X groups of through holes, and each group of through holes includes Y pairs of slots distributed radially along the valve sleeve; wherein the range of X is 3-20, and the range of Y is 1-15.

4. The nested antler channel according to claim 3, characterized in that: Assuming the cross-sectional area of ​​the main branch is S, then S≥K1*h*b*Y; where K1 is a multiple and ranges from 2 to 16, h is the moving distance of the valve core, and b is the width of the slot; Assuming that the difference in cross-sectional area between the annular sleeve and the valve core is ΔS, then ΔS≥K2*h*b*Y; wherein K2 is a multiple, and K2 is 2-10.

5. The nested antler channel according to claim 3, characterized in that: Assume that when the valve core slides to the left limit position inside the valve sleeve, it can conduct the through holes in group A, and when the valve core slides to the right limit position inside the valve sleeve, it can conduct the through holes in group B; wherein the range of A and B is both 2~(X-1).

6. The nested antler channel according to claim 3, characterized in that: The shape of the slot is at least one of waist-shaped, circular, polygonal, star-shaped or irregular.

7. The nested antler channel according to claim 1, characterized in that: An accommodating cavity for accommodating the valve sleeve is provided in the nested antler channel, and an installation opening communicating with the accommodating cavity is provided on one side of the nested antler channel, and a sealing cover is detachably connected to the installation opening; The fitting clearance between the valve sleeve and the accommodating cavity is -20~20 μm.

8. The nested antler channel according to claim 1, characterized in that: The inner portion of the surrounding solid portion of the nested antler channel is a lattice structure; The lattice structure is any one of a rod-shaped lattice, a plate-shaped lattice or a continuous curved surface lattice.

9. The nested antler channel according to claim 1, characterized in that: The antler fluid channels are provided in four groups, namely, antler fluid channel E, antler fluid channel O, antler fluid channel Y1 and antler fluid channel Y2; wherein antler fluid channel E has one main branch, eight first branches and sixteen second branches, antler fluid channel O has one main branch, four first branches and sixteen second branches, antler fluid channel Y1 and antler fluid channel Y2 each have one main branch, two first branches and eight second branches; the main branch of antler fluid channel E is used to connect to the hydraulic pump, the main branch of antler fluid channel O is used to connect to the oil source, antler fluid channel Y1 and antler fluid channel Y2 are respectively connected to the oil inlet and oil return port of the hydraulic equipment; The valve sleeve is provided with two groups of through holes a, one group of through holes b, one group of through holes c and two groups of through holes d. Each group of through holes a has 8 slots, which are respectively connected to the second branches corresponding to the antler fluid channel E. The through holes b and the through holes c both have 8 slots, which are respectively connected to the corresponding second branches of the antler fluid channel Y1 and the antler fluid channel Y2. Each group of through holes d has 8 slots, which are respectively connected to the second branches of the antler fluid channel O.

10. A servo valve, characterized in that: Comprising the nested antler channels of any one of claims 1-9.

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