A new oil distribution disc structure

Abstract

The utility model discloses a novel oil distribution disc structure, including the disc body, be provided with the flow distribution window and the oil seal band of the disc body two end faces, the oil seal band all distributes the micro -texturing structure. The micro -texturing structure of laser texturing treatment is additionally arranged at the oil seal band, can ensure that oil film is not completely extruded under high pressure, and the width size is matched with oil viscosity, avoids the oil film rupture and causes dry friction. The newly added micro -texturing structure can increase the oil storage capacity nearly three times, and the oil film keeps time at least 60s when stopping machine protection.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic pumps, specifically a novel oil distribution plate structure. Background Technology

[0002] The distributor plate is a core component of hydraulic motors and pumps, managing high and low pressure oil distribution through piston chamber pressure management and oil circuit switching. Research revealed that the distributor plate structure of CN207377788U, while employing an oil sealing strip, relies solely on this strip for isolation and sealing, resulting in limited oil storage capacity. This is especially problematic during shutdown protection, where the oil film's duration is limited, leading to wear issues. Summary of the Invention

[0003] The technical problem to be solved by this utility model is:

[0004] How to solve the problem of insufficient oil storage, which leads to insufficient oil film retention time during shutdown protection and subsequent disc wear?

[0005] To solve the above-mentioned technical problems, the inventors, through practice and summarization, derived the technical solution of this invention, which adopts the following technical solution:

[0006] A novel oil distribution plate structure includes a plate body, on which oil distribution windows are provided and oil sealing strips are located on two end faces of the plate body 10. Both oil sealing strips are distributed with micro-woven structures.

[0007] In the oil distribution plate structure, the microwoven structure is laser-textured pits with a diameter of Φ70-85μm, a depth of 10-20μm, and a surface density of 15-25%.

[0008] In the oil distribution plate structure, the side of the plate facing the cylinder block is the cylinder block mating surface, and the cylinder block mating surface has a spherical structure.

[0009] In the oil distribution plate structure, an oil unloading groove and an auxiliary support belt are provided on the side of the plate body facing away from the cylinder block mating surface.

[0010] In the oil distribution plate structure, the oil distribution window includes an oil suction window and an oil discharge window. An unloading groove one and an unloading groove two are respectively provided on one side of the oil suction window and the oil discharge window. The unloading groove one and the unloading groove two are centrally symmetrically distributed about the axis of the plate body and are distributed on the cylinder block mating surface.

[0011] In the oil distribution plate structure, the plate body is provided with pressure relief holes. The pressure relief holes are distributed in the unloading groove near the tail end. The pressure relief holes are through holes with one end larger than the other. The side closer to the cylinder body mating surface is the larger hole with a diameter of 2-4mm, and the side farther away from the cylinder body mating surface is the smaller hole with a diameter of 0.5-1.0mm.

[0012] In the oil distribution plate structure, a pressure relief groove is provided on the plate body, which is used to connect the large hole of the pressure relief hole and the oil drain window.

[0013] In the oil distribution plate structure, the end of the oil suction window near the oil discharge window is provided with a laminar flow surface that gradually shifts inward from the end away from the cylinder block mating surface.

[0014] In the oil distribution plate structure, the distance between the end of the unloading groove furthest from the oil suction window and the oil suction window is equal to the width of the oil hole on the cylinder block.

[0015] In the oil distribution plate structure, a sulfur-permeable layer is provided on the friction pair surface of the plate body, and the thickness of the sulfur-permeable layer is 8-12μm.

[0016] In the oil distribution plate structure, the oil drain window is provided with multiple waist-shaped sub-window holes. There are three sets of waist-shaped sub-window holes. The two ends of the three sets of sub-window holes are semi-circular structures, namely sub-window hole one, sub-window hole two, and sub-window hole three. Sub-window hole two is located between sub-window hole one and sub-window hole three. The arc angles between the two ends of sub-window hole one, sub-window hole two, and sub-window hole three are 13.5°, 18.95°, and 15.9°, respectively. Sub-window hole one is distributed on the side of the oil drain window that is close to the unloading groove one.

[0017] In the oil distribution plate structure, the depth of the first unloading groove decreases linearly upward at an angle of 7.3° along the side away from the oil suction window, and the depth of the second unloading groove decreases linearly upward at an angle of 3.6° along the side away from the oil discharge window.

[0018] In the oil distribution plate structure, a sulfur-permeable layer is provided on the friction pair surface of the plate body, and the thickness of the sulfur-permeable layer is 8-12μm.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This utility model provides oil sealing strips on both end faces of the disc body, and provides micro-woven structures obtained by laser texturing on the oil sealing strips. This ensures that the oil film is not completely squeezed out under high pressure, and strictly limits its diameter size to match the oil viscosity, avoiding dry friction caused by oil film rupture. The newly added micro-woven structure can increase the oil storage capacity by nearly three times, and the oil film retention time is at least 60 seconds during shutdown protection.

[0021] 2. This utility model provides a pressure relief hole and a pressure relief groove in the unloading groove of the oil drain window. The function of the pressure relief hole is to eliminate the closed volume effect in the flow distribution process, avoid pressure peaks, and suppress hydraulic shock; provide a smooth pressure transition zone to prevent cavitation erosion from damaging the friction pair surface; reduce flow and pressure pulsation and optimize the pump noise level; reduce endogenous wear debris caused by impact and cavitation, maintain the cleanliness of the system oil, and improve the overall reliability of the machine.

[0022] 3. This utility model provides a sulfur-permeable layer on the surface of the friction pair, with FeS phase content >90%. The friction coefficient of the sulfur-permeable layer is reduced from the original μ=0.15 to μ=0.08, thereby reducing the starting torque by about 42%. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the oil distribution plate of this utility model;

[0024] Figure 2 This is a front view of the oil distribution plate of this utility model;

[0025] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0026] Figure 4 This is a rear view of the oil distribution plate of this utility model;

[0027] Figure 5 This is a schematic diagram showing the oil distribution plate from the rear view of this utility model;

[0028] Figure 6 This is a side view of the oil distribution plate of this utility model;

[0029] Figure 7 This is a cross-sectional view of the unloading groove of this utility model;

[0030] Figure 8 This is a cross-sectional view of the unloading groove II of this utility model.

[0031] In the diagram: 10. Disc; 12. Oil sealing strip; 13. Cylinder block mating surface; 14. Oil unloading groove; 15. Auxiliary support strip; 16. Oil suction window; 17. Oil discharge window; 18. Unloading groove one; 19. Unloading groove two; 110. Pressure relief hole; 111. Pressure relief groove; 112. Laminar flow surface. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0033] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Example 1

[0035] like Figure 1 and Figure 2 , Figure 4 As shown, a novel oil distribution plate structure includes a plate body 10, an oil distribution window and oil sealing strips 12 located on two end faces of the plate body 10, and micro-woven structures are distributed on both oil sealing strips 12.

[0036] The microwoven structure consists of laser-textured pits with a diameter of Φ70-85μm, a depth of 10-20μm, and a surface density of 15-25%. Preferably, the pits have a diameter of Φ85μm, a depth of 15μm, and a surface density of 20±2%.

[0037] The sealing belt is equipped with a micro-woven structure obtained by laser texturing, which ensures that the oil film is not completely squeezed out under high pressure, strictly limits its diameter size to match the oil viscosity, and can also balance the surface pressure on both sides to ensure mechanical balance, reduce noise, and avoid dry friction caused by oil film rupture. The newly added micro-woven structure can increase the oil storage capacity by nearly three times, and the oil film retention time is at least 60 seconds during shutdown protection.

[0038] Example 2

[0039] Based on the above embodiment 1, such as Figure 6 As shown, the side of the disc 10 facing the cylinder body is the cylinder body mating surface 13, and the cylinder body mating surface 13 has a spherical structure.

[0040] like Figure 4 As shown, the side of the disc 10 facing away from the cylinder body mating surface 13 is provided with an oil unloading groove 14 and an auxiliary support belt 15.

[0041] like Figure 2 As shown, the oil distribution window includes an oil suction window 16 and an oil discharge window 17. An unloading groove 18 and an unloading groove 2 19 are respectively provided on one side of the oil suction window 16 and the oil discharge window 17. The unloading groove 18 and the unloading groove 2 19 are centrally symmetrically distributed about the axis of the disc body 10. The unloading groove 18 and the unloading groove 2 19 are distributed on the cylinder block mating surface 13.

[0042] In the oil distribution plate structure, the oil drain window 17 is provided with multiple waist-shaped sub-window holes. There are three sets of waist-shaped sub-window holes. The two ends of the three sets of sub-window holes are semi-circular structures, namely sub-window hole one, sub-window hole two, and sub-window hole three. Sub-window hole two is located between sub-window hole one and sub-window hole three. The arc angles between the two ends of sub-window hole one, sub-window hole two, and sub-window hole three are 13.5°, 18.95°, and 15.9°, respectively. Sub-window hole one is distributed on the side of the oil drain window 17 near the unloading groove one 18.

[0043] In the aforementioned oil distribution plate structure, such as Figure 7 and Figure 8As shown, the depth of the unloading groove 18 decreases linearly upward at an angle of 7.3° along the side away from the oil suction window 16, and the depth of the unloading groove 19 decreases linearly upward at an angle of 3.6° along the side away from the oil discharge window 17.

[0044] like Figure 7 and Figure 5 As shown, the disc body 10 is provided with pressure relief holes 110. The pressure relief holes 110 are distributed near the tail of the unloading groove 18. The pressure relief holes 110 are through holes with one end larger than the other. The side closer to the cylinder body mating surface 13 is the larger hole with a diameter of 2-4 mm, and the side farther away from the cylinder body mating surface 13 is the smaller hole with a diameter of 0.5-1.0 mm.

[0045] The disc body 10 is provided with a pressure relief groove 111, which is used to connect the large hole of the pressure relief hole 110 and the oil drain window 17.

[0046] The spherical structure of the cylinder block mating surface 13 is adapted to the cylinder block to complete relative rotation during operation, ensuring the stability of the structure. Since there are high-pressure oil areas and low-pressure oil areas in the oil distribution plate, the unloading groove is used to switch between the two. However, local high pressure will appear at the position of the unloading groove 19. The pressure is relieved by the pressure relief hole 110, but a high-pressure oil surface will be formed on the back of the oil distribution plate, resulting in the problem of pressure imbalance on the oil distribution plate surface. The high-pressure oil surface is diverted to the oil drain window 17 side through the pressure relief groove 111 to ensure surface pressure balance, eliminate noise and burn-out problems.

[0047] Example 3

[0048] In the first embodiment, as Figure 2 As shown, the oil suction window 16 is provided with a laminar flow surface 112 at the end near the oil discharge window 14, which gradually shifts inward from the end away from the cylinder block mating surface 13 towards the inside of the oil suction window 16. In the traditional form, the surface is vertical, which can cause turbulence and damage to the disc during the transition between high-pressure and low-pressure oil zones. The laminar flow surface is used to guide the oil to form a laminar flow surface to avoid the problem of disc damage.

[0049] The distance between the end of the unloading groove 18 furthest from the oil suction window 16 and the oil suction window 16 is equal to the width of the oil hole on the cylinder block, that is, the distance between the two is equal to the size of the oil hole on the cylinder block. Utilizing the high-pressure and low-pressure switching, if the distance is smaller than the oil hole width, the high and low-pressure oil zones will be connected; if it is too large, it will increase the switching time between the high and low-pressure oil zones, leading to problems such as burnt plates and noise.

[0050] Example 4

[0051] In Embodiment 1, a sulfur-permeable layer with a thickness of 8-12 μm is provided on the friction pair surface of the disc body 10. The friction coefficient μ=0.15 is reduced to μ=0.08 by the sulfur-permeable layer, thereby reducing the starting torque by approximately 42%.

[0052] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A novel oil distribution plate structure, comprising a plate body (10), wherein the plate body (10) is provided with an oil distribution window and an oil sealing strip (12) located on two end faces of the plate body (10), characterized in that: Both of the oil sealing strips (12) have microwoven structures distributed on them; The microwoven structure consists of laser-textured pits with a diameter of Φ70-85μm, a depth of 10-20μm, and a surface density of 15-25%.

2. The novel oil distribution plate structure according to claim 1, characterized in that, The side of the disc (10) facing the cylinder is the cylinder mating surface (13), which is a spherical structure.

3. The novel oil distribution plate structure according to claim 2, characterized in that, The disc body (10) is provided with an oil unloading groove (14) and an auxiliary support belt (15) on the side opposite to the cylinder body mating surface (13).

4. The novel oil distribution plate structure according to claim 2, characterized in that, The oil distribution window includes an oil suction window (16) and an oil discharge window (17). An unloading groove one (18) and an unloading groove two (19) are respectively provided on one side of the oil suction window (16) and the oil discharge window (17). The unloading groove one (18) and the unloading groove two (19) are centrally symmetrically distributed about the axis of the disc body (10). The unloading groove one (18) and the unloading groove two (19) are distributed on the cylinder body mating surface (13).

5. The novel oil distribution plate structure according to claim 4, characterized in that, The disc (10) is provided with pressure relief holes (110). The pressure relief holes (110) are distributed in the unloading groove (18) near the tail. The pressure relief holes (110) are through holes with one end larger than the other. The side closer to the cylinder mating surface (13) is a large hole with a diameter of 2-4 mm, and the side away from the cylinder mating surface (13) is a small hole with a diameter of 0.5-1.0 mm.

6. The novel oil distribution plate structure according to claim 5, characterized in that, The disc body (10) is provided with a pressure relief groove (111), which is used to connect the large hole of the pressure relief hole (110) and the oil drain window (17).

7. The novel oil distribution plate structure according to claim 4, characterized in that, The oil suction window (16) is provided with a laminar flow surface (112) that gradually shifts towards the inside of the oil suction window (16) from the end away from the cylinder body joint surface (13).

8. The novel oil distribution plate structure according to claim 4, characterized in that, The distance between the end of the unloading groove (18) away from the oil suction window (16) and the oil suction window (16) is equal to the width of the oil hole on the cylinder.

9. The novel oil distribution plate structure according to claim 1, characterized in that, A sulfur-permeable layer with a thickness of 8-12 μm is provided on the friction pair surface of the disc body (10).

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