Crescent topological functional groove structure

Abstract

The utility model discloses a crescent topological functional groove structure. The structure comprises a crescent extension function groove, an annular groove, a sealing ring groove, a function hole and a chamfer. The embodiment of the utility model provides a novel crescent topological functional groove structure suitable for a high-pressure system, which is realized by adopting a machining mode, can replace an electric spark hole to realize a flow topological function, and realizes effective flow communication on the basis of ensuring that the axial length of a ring groove is not changed. The contradiction between the communication flow and the limitation of the axial length of the ring groove of the functional assembly can be solved.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic actuator design technology, specifically relating to a crescent-shaped topographic groove structure. Background Technology

[0002] As a key component in the hydraulic control system, the hydraulic housing is not only the mounting base for various hydraulic components, functional valve assemblies, and hydraulic interface accessories, but also the carrier for oil circuit communication with servo valves, various functional valves, and actuators, as well as the realization of the hydraulic logic control principle of the actuator.

[0003] For hydraulic housings below 28MPa, EDM square holes are generally used as a simple way to achieve oil passage communication within the functional holes. Due to their aspect ratio, they can compensate for insufficient flow caused by the axial distance limitation of the functional ring grooves. However, the surface layer machined by EDM will form a remelted layer with microcracks. In high-pressure hydraulic systems of 35MPa and above, these microcracks will rapidly propagate, leading to significant leakage from the hydraulic housing. In severe cases, this can cause the hydraulic system to fail or actuators to malfunction. Therefore, EDM square holes are not suitable for high-pressure hydraulic systems of 35MPa and above.

[0004] However, for complex hydraulic actuators used in the main control surfaces, achieving a high power-to-weight ratio while ensuring extremely high operational and safety reliability results in highly complex functional components and even more stringent limitations on the axial distance of the functional annular grooves. Therefore, a flow topology structure is needed to replace the EDM square orifice, suitable for housing designs of high-pressure hydraulic systems of 35MPa and above. Utility Model Content

[0005] This invention provides a crescent-shaped topology groove structure suitable for high-voltage systems, which is achieved by mechanical processing. It can replace EDM holes to realize flow topology function, and achieve effective flow communication while ensuring that the axial length of the annular groove remains unchanged. It can resolve the contradiction between the communication flow and the limitation of the axial length of the annular groove of the functional component.

[0006] This utility model provides a crescent-shaped topography functional groove structure, located within the functional hole 4 at the center of the hydraulic housing. The crescent-shaped topography functional groove structure includes: a crescent-shaped topography functional groove 1, an annular groove 2, and a sealing surface 3; wherein:

[0007] Multiple annular grooves 2 are provided inside the functional hole, and a sealing surface 3 is formed between two adjacent annular grooves 2;

[0008] One of the annular grooves 2 has a crescent-shaped topography groove 1 at its bottom;

[0009] The crescent-shaped topography groove 1 and the annular groove 2 are milled by a T-shaped tool deep into the functional hole 4.

[0010] Optionally, chamfers 5 are provided on both sides of the annular groove 2 to make the cross-section of the annular groove 2 trapezoidal.

[0011] Optionally, the diameter of the annular groove d2 is 0.5-1 mm larger than the diameter of the functional hole d1.

[0012] Optionally, the angle of the crescent-shaped topography groove 1 is adjusted according to the hydraulic housing oil circuit layout requirements, and the axial width is determined according to the size of the oil circuit hole intersecting with it, so as to meet the oil passage area requirements of the oil circuit hole.

[0013] Optionally, the diameter d3 of the crescent-shaped topology groove 1 is not greater than the diameter d1 of the functional hole; the eccentricity d4 of the crescent-shaped topology groove 1 is adjusted according to the distance L1 between the annular groove 3 and the opening of the functional hole 4.

[0014] Optional values ​​are d1=31.52mm, d2=32.52mm, d3=31.52mm, d4=4.00mm, and L1=129.5mm;

[0015] d1 is the diameter of the functional hole, d2 is the diameter of the annular groove, d3 is the diameter of the crescent-shaped topography functional groove, d4 is the axial eccentricity between the center of the crescent-shaped topography functional groove and the center of the annular groove, and L1 is the distance between the annular groove and the opening of the functional hole.

[0016] Optional values ​​are d1=28.35mm, d2=29.4mm, d3=28.35mm, d4=4.00mm, and L1=126.5mm;

[0017] d1 is the diameter of the functional hole, d2 is the diameter of the annular groove, d3 is the diameter of the crescent-shaped topography functional groove, d4 is the axial eccentricity between the center of the crescent-shaped topography functional groove and the center of the annular groove, and L1 is the distance between the annular groove and the opening of the functional hole.

[0018] Optional values ​​are d1=18.75mm, d2=19.75mm, d3=18.75mm, d4=2.5mm, and L1=34.8mm.

[0019] d1 is the diameter of the functional hole, d2 is the diameter of the annular groove, d3 is the diameter of the crescent-shaped topography functional groove, d4 is the axial eccentricity between the center of the crescent-shaped topography functional groove and the center of the annular groove, and L1 is the distance between the annular groove and the opening of the functional hole.

[0020] This invention provides a crescent-shaped topological functional groove structure suitable for high-pressure systems. The structure is simple, consisting of a functional annular groove in the housing and an eccentric annular groove with the same sealing diameter but a different axis. This structure can be achieved using a T-shaped tool for machining the functional annular groove in the housing. The invention employs machining, enabling oil passage communication within the functional hole. The crescent-shaped topological functional groove structure has no directional restrictions in the circumferential direction, allowing for angle adjustment according to the hydraulic housing oil passage layout requirements. Its axial width can be set according to the size of the intersecting oil passage holes, thus meeting the oil passage area requirements of different oil passage holes. Because electrical discharge machining is not used, there is no failure mode of micro-cracks on the remelted layer surface, meeting the strength and fatigue design requirements of high-pressure systems. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the crescent-shaped topography functional groove structure according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic cross-sectional view of the crescent-shaped topography functional groove structure according to an embodiment of the present invention;

[0024] Explanation of reference numerals in the attached figures:

[0025] Crescent-shaped topography groove-1, ring groove-2, sealing surface-3, functional hole-4, chamfer-5. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] The features and illustrative embodiments of various aspects of this utility model will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a comprehensive understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this utility model by illustrating examples of it. This utility model is by no means limited to any specific arrangements and methods set forth below, but covers any improvements, substitutions, and modifications to the structure, method, and apparatus without departing from the spirit of this utility model. In the accompanying drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring this utility model.

[0028] It should be noted that, where there is no conflict, the embodiments of this utility model and the features therein can be combined with each other, and the various embodiments can be referenced and cited in turn. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Figure 1 This is a schematic diagram of the crescent-shaped topography functional groove structure according to an embodiment of this utility model. Figure 1 As shown, the crescent-shaped topography functional groove structure may include: crescent-shaped topography functional groove 1, annular groove 2, sealing surface 3, functional hole 4, and chamfer 5.

[0030] The crescent-shaped topography functional groove structure provided by this utility model is located in the functional hole 4 at the center of the hydraulic housing. Multiple annular grooves 2 are provided in the functional hole, and a sealing surface 3 is formed between two adjacent annular grooves 2. A crescent-shaped topography functional groove 1 is provided at the bottom of one of the annular grooves 2. The crescent-shaped topography functional groove 1 and the annular groove 2 are milled by a T-shaped tool that penetrates into the functional hole 4.

[0031] Optionally, chamfers 5 are provided on both sides of the annular groove 2 to make the cross-section of the annular groove 2 trapezoidal.

[0032] Optionally, the diameter of the annular groove d2 is 0.5-1 mm larger than the diameter of the functional hole d1.

[0033] Optionally, the angle of the crescent-shaped topography groove 1 is adjusted according to the hydraulic housing oil circuit layout requirements, and the axial width is determined according to the size of the oil circuit hole intersecting with it, so as to meet the oil passage area requirements of the oil circuit hole.

[0034] Optionally, the diameter d3 of the crescent-shaped topology groove 1 is not greater than the diameter d1 of the functional hole; the eccentricity d4 of the crescent-shaped topology groove 1 is adjusted according to the distance L1 between the annular groove 3 and the opening of the functional hole 4.

[0035] In the figure, the diameter of the functional hole is d1, the diameter of the annular groove is d2, the diameter of the crescent-shaped topography functional groove is d3, the axial eccentricity of the center of the crescent-shaped topography functional groove to the center of the annular groove is d4, and the distance of the annular groove to the opening of the functional hole is L1.

[0036] Among them, the diameter of the functional hole d1 depends on the sealing size of the component selected for the hydraulic product; the diameter of the annular groove d2 is generally larger than the diameter of the functional hole d1, and is used for the seal to be far away from the oil passage hole, usually the diameter of the functional hole d1 + 1mm; the diameter of the crescent topography functional groove d3 is at most equal to the diameter of the functional hole d1; the eccentricity d4 of the crescent topography functional groove can be adjusted according to the distance L1 between the annular groove 3 and the opening of the functional hole 4.

[0037] In some embodiments, d1=31.52mm, d2=32.52mm, d3=31.52mm, d4=4.00mm, and L1=129.5mm.

[0038] In some embodiments, d1=28.35mm, d2=29.4mm, d3=28.35mm, d4=4.00mm, and L1=126.5mm.

[0039] In some embodiments, d1=18.75mm, d2=19.75mm, d3=18.75mm, d4=2.5mm, and L1=34.8mm.

[0040] Extensive experiments have proven that the crescent-shaped topographic groove structure is not only simple in structure but also extremely strong, and has no restrictions on its direction of use. Currently, this crescent-shaped topographic groove structure has been applied to a certain type of hydraulic housing product.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should be covered within the protection scope of this utility model.

Claims

1. A crescent-shaped topography functional groove structure, characterized in that, Located within the functional hole (4) at the center of the hydraulic housing, the crescent-shaped topography functional groove structure includes: a crescent-shaped topography functional groove (1), an annular groove (2), and a sealing surface (3); wherein: Multiple annular grooves (2) are provided inside the functional hole (4), and a sealing surface (3) is formed between two adjacent annular grooves (2); One of the annular grooves (2) has a crescent-shaped topography groove (1) at its bottom; The crescent-shaped topography groove (1) and the annular groove (2) are milled by a T-shaped tool into the functional hole (4).

2. The crescent-shaped topography functional groove structure according to claim 1, characterized in that, The annular groove (2) is also provided with chamfers (5) on both sides, so that the cross section of the annular groove (2) is trapezoidal.

3. The crescent-shaped topography functional groove structure according to claim 1, characterized in that, The diameter of the annular groove d2 is 0.5-1mm larger than the diameter of the functional hole d1.

4. The crescent-shaped topography functional groove structure according to claim 1, characterized in that, The angle of the crescent topography groove (1) located in the annular groove (2) is adjusted according to the hydraulic housing oil circuit layout requirements, and the axial width is determined according to the size of the oil circuit hole that intersects with it, so as to meet the oil passage area requirements of the oil circuit hole.

5. The crescent-shaped topography functional groove structure according to claim 3, characterized in that, The diameter d3 of the crescent topography function groove (1) is not greater than the diameter d1 of the function hole; the eccentricity d4 of the crescent topography function groove (1) is adjusted according to the distance L1 between the annular groove (2) and the opening of the function hole (4).

6. The crescent-shaped topography functional groove structure according to claim 5, characterized in that, d1=31.52mm, d2=32.52mm, d3=31.52mm, d4=4.00mm, L1=129.5mm.

7. The crescent-shaped topography functional groove structure according to claim 5, characterized in that, d1=28.35mm, d2=29.4mm, d3=28.35mm, d4=4.00mm, L1=126.5mm.

8. The crescent-shaped topography functional groove structure according to claim 1, characterized in that, d1=18.75mm, d2=19.75mm, d3=18.75mm, d4=2.5mm, L1=34.8mm.

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