Return oil pressure impact resistant hydraulic oil tank and engineering machinery thereof

Abstract

The utility model discloses an oil return pressure impact resistant hydraulic oil tank and engineering machinery thereof, and belongs to the technical field of engineering machinery. The defects that in the prior art, when hydraulic oil of a traditional hydraulic oil tank returns, a filter element is damaged, and the service life of the filter element is affected are overcome. The main structure of the oil tank comprises an oil tank body, an oil return cylinder is arranged in the oil tank body, an oil return filter element is arranged in the oil return cylinder, an oil return pipe is arranged on the side wall of the oil tank body, the oil return pipe penetrates through the oil tank body and then is communicated with the interior of the oil return cylinder, and a second baffle is arranged at an outlet of the oil return pipe located in the oil return cylinder. The distance between the outlet end face of the oil return pipe and the arc face of the second baffle is L. The utility model is mainly applied to engineering machinery.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to a hydraulic oil tank capable of resisting oil return pressure shock and an engineering machinery thereof. Background Art

[0002] The hydraulic oil tank is an important part of the hydraulic system. It stores oil for the system, separates gas and impurities from the oil, and can dissipate heat. Air or impurities mixed in the hydraulic oil will cause oil contamination, oil deterioration, vibration and noise in the system, and cavitation of hydraulic components, which will seriously affect the stability of the hydraulic system and the life of hydraulic components. Especially when the hydraulic oil returns, it will have a certain impact on the oil and filter element inside the tank, and the oil level in the tank will shake and draw in air. Therefore, it is necessary to design and optimize the hydraulic oil tank structure well to ensure the stability of the flow of oil inside the tank and the oil flow back and out of the tank, and effectively prevent the mixing of air in the hydraulic oil.

[0003] The existing construction machinery hydraulic oil tank structure is as follows Figure 8 As shown, it is composed of an oil suction steel pipe, an oil suction filter element, a liquid level gauge, a box body, a breathing valve, an oil suction flange cover plate, an oil return flange cover plate, an oil return filter element, an oil return steel pipe and an oil return steel cylinder. The end of the oil return steel pipe directly leads to the oil return filter element through the oil return steel cylinder, and the partition is installed in the middle of the box body; but the shortcomings of the existing hydraulic oil tank are: 1. The filter assembly of the existing hydraulic oil tank is directly installed at the end of the return oil pipe. Since there will be a certain return oil pressure when the hydraulic oil returns, the filter element will be damaged, affecting the service life of the filter element; 2. The return oil impact will cause the oil inside the hydraulic oil tank to shake and splash, causing air entrainment, affecting the stability of the oil flow and thus affecting the performance of the hydraulic system; 3. There is no return oil pressure protection, which easily causes the oil tank to leak or oil overflow at the refueling port and exhaust port, thereby affecting the service life of the hydraulic oil tank. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a hydraulic oil tank and engineering machinery thereof which are resistant to oil return pressure shock.

[0005] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0006] A hydraulic oil tank resistant to return oil pressure shock comprises an oil tank body, an oil return cylinder is arranged inside the oil tank body, an oil return filter is arranged inside the oil return cylinder, an oil return pipe is arranged on the side wall of the oil tank body, the oil return pipe passes through the oil tank body and is connected with the interior of the oil return cylinder, a baffle plate 2 is arranged at the outlet of the oil return pipe located inside the oil return cylinder, and the distance between the outlet end face of the oil return pipe and the arc surface of the baffle plate 2 is L.

[0007] Preferably, baffle plate 1 is arranged below baffle plate 2, and baffle plate 1 is arranged inside the oil return cylinder.

[0008] Preferably, the second baffle is welded to the inner ring of the oil return cylinder.

[0009] Preferably, the baffle plate 1 is a circular ring structure, and the baffle plate 1 is arranged concentrically with the oil return cylinder.

[0010] Preferably, a gap is provided between the baffle plate 1 and the baffle plate 2.

[0011] Preferably, the baffle plate 1 is provided with more than one oil leakage hole.

[0012] Preferably, an oil suction flange pipe is provided at the bottom of the oil tank body, and an oil return flange cover plate, an oil suction flange cover plate and a breather installed on the oil suction flange cover plate are provided on the upper end surface; the oil return flange cover plate is connected to the oil return cylinder, and an oil suction filter element is provided on the upper end surface of the oil suction flange pipe.

[0013] Preferably, a liquid level gauge is provided on the outer surface of the oil tank body, and a partition is provided in the middle of the inside.

[0014] An engineering machine is provided with a hydraulic oil tank capable of resisting return oil pressure shock as described in any one of the above items.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. By welding baffle plate 2 inside the oil return cylinder and directly opposite to the outlet of the oil return pipe, when the hydraulic return oil is ejected through the outlet of the oil return pipe, baffle plate 2 blocks the outlet of the oil return pipe, thus preventing the impact of oil splashing on the oil return filter element when the hydraulic oil returns quickly through the oil return pipe, thereby protecting the filter element;

[0017] 2. By welding baffle plate 1 inside the oil return cylinder and directly below baffle plate 2, and providing a number of distributed oil leakage holes on baffle plate 1, the oil can flow out slowly through the oil leakage holes of baffle plate 1, which plays a certain role of buffering and damping, reduces the impact and collision of oil splashing caused by baffle plate 2 on the oil return, and makes the oil plane move smoothly, further solving the problem of oil seepage and leakage through the breather due to liquid surface impact;

[0018] In summary, the utility model reduces the damage to the oil return filter element caused by the return oil pressure, ensures that the hydraulic oil has good flow characteristics and enables the hydraulic system to work stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the oil return steel cylinder in the utility model;

[0022] Figure 4 This is a schematic diagram of the structure when the distance between baffle plate 1 and baffle plate 2 is H in the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the baffle plate 2 in the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the baffle plate 1 in the utility model;

[0025] Figure 7 This is a schematic diagram of the position relationship between the second baffle plate and the oil return steel pipe in the utility model;

[0026] Figure 8 It is a structural schematic diagram of the existing engineering machinery hydraulic oil tank structure.

[0027] In the figure: 1. Oil suction flange pipe; 2. Oil tank body; 3. Liquid level gauge; 4. Oil suction flange cover; 5. Breather; 6. Oil return flange cover; 7. Oil return pipe; 8. Oil return cylinder; 9. Partition; 10. Oil suction filter element; 11. Baffle 1; 12. Baffle 2; 13. Oil return filter element; 14. Oil leakage hole. DETAILED DESCRIPTION

[0028] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0029] Embodiment 1:

[0030] like Figure 1-3 As shown in Figure 7, a hydraulic oil tank resistant to return oil pressure shock includes a tank body 2, an oil return cylinder 8 is arranged inside the tank body 2, an oil return filter 13 is arranged inside the oil return cylinder 8, and an oil return pipe 7 is arranged on the side wall of the tank body 2. The oil return pipe 7 passes through the tank body 2 and is connected with the interior of the oil return cylinder 8. A baffle plate 12 is welded at the outlet of the oil return pipe 7 located inside the oil return cylinder 8. The distance between the outlet end face of the oil return pipe 7 and the arc surface of the baffle plate 12 is L, and the value range of L is: L≥1mm.

[0031] By welding a baffle 12 inside the oil return cylinder 8 and at a position directly opposite the outlet of the oil return pipe 7 for shielding, the oil return filter 13 can be prevented from being impacted by oil splashes when the hydraulic oil returns quickly through the oil return pipe 7, thereby protecting the oil return filter 13.

[0032] Embodiment 2:

[0033] like Figure 3 As shown, a hydraulic oil tank resistant to oil return pressure shock is different from the embodiment 1 in that a baffle 11 is provided below the baffle 2 12, the baffle 2 12 is welded to the inner ring of the oil return cylinder 8, and the baffle 1 11 is provided inside the oil return cylinder 8. In this embodiment, the baffle 1 11 and the baffle 2 12 are used to prevent the oil return shock from damaging the oil return filter element 13 and ensure the stability of the oil.

[0034] like Figure 6 As shown, the baffle 11 is a circular plane plate, and the baffle 11 is concentrically arranged with the oil return cylinder 8. The inner ring diameter of the baffle 11 is larger than the diameter of the oil return filter element 13, and the baffle 11 is provided with more than one oil leakage hole 14.

[0035] In this embodiment, baffle plate 11 is welded inside the oil return cylinder 8 and directly below baffle plate 2 12. Baffle plate 11 is welded to the inner circle of the oil return cylinder 8, and a plurality of distributed oil leakage holes 14 are provided on baffle plate 11. This can reduce the shielding of the return oil by baffle plate 2 12, thereby reducing the impact and collision of oil splashes on the lower layer of oil, and making the oil plane move smoothly, further solving the problem of oil seepage and leakage through the respirator 5 due to liquid surface impact.

[0036] like Figure 4 As shown, the distance between the baffle 1 11 and the baffle 2 12 is H, and the value range of H is: H≥1mm.

[0037] like Figure 5 and 7 As shown, the baffle plate 12 is a structure with two sides bent outward and an arc in the middle. The middle arc of the baffle plate 12 is concentric with the return oil filter element 13, and the radius of the middle arc is greater than or equal to the radius of the return oil filter element 13.

[0038] For example Figure 1-2 As shown, an oil suction flange pipe 1 is provided at the bottom of the oil tank body 2, and an oil return flange cover plate 6, an oil suction flange cover plate 4 and a breather 5 installed on the oil suction flange cover plate 4 are provided on the upper end surface. The oil return flange cover plate 6 is connected to the oil return cylinder 8, and an oil suction filter element 10 is provided on the upper end surface of the oil suction flange pipe 1; a liquid level gauge 3 is provided on the outer surface of the oil tank body 2, and a partition plate 9 is welded at the middle position inside the oil tank body 2 to separate the oil suction area and the oil return area.

[0039] Embodiment 3:

[0040] An engineering machine is provided with a hydraulic oil tank resistant to return oil pressure shock as described in the above-mentioned embodiment 1 or embodiment 2.

Claims

1. A hydraulic oil tank resistant to oil return pressure shock, comprising an oil tank body (2), characterized in that: An oil return cylinder (8) is arranged inside the oil tank body (2), an oil return filter element (13) is arranged inside the oil return cylinder (8), an oil return pipe (7) is arranged on the side wall of the oil tank body (2), the oil return pipe (7) passes through the oil tank body (2) and is connected with the inside of the oil return cylinder (8), a baffle plate 2 (12) is arranged at the outlet of the oil return pipe (7) inside the oil return cylinder (8), and the distance between the outlet end face of the oil return pipe (7) and the arc surface of the baffle plate 2 (12) is L.

2. The hydraulic oil tank resistant to oil return pressure shock according to claim 1, characterized in that: Baffle plate 1 (11) is arranged below baffle plate 2 (12), and baffle plate 1 (11) is arranged inside the oil return cylinder (8).

3. The hydraulic oil tank resistant to oil return pressure shock according to claim 2, characterized in that: The second baffle plate (12) is welded to the inner ring of the oil return cylinder (8).

4. The hydraulic oil tank resistant to oil return pressure shock according to claim 2, characterized in that: The baffle plate 1 (11) is a circular ring structure, and the baffle plate 1 (11) is arranged concentrically with the oil return cylinder (8).

5. The hydraulic oil tank resistant to oil return pressure shock according to claim 2, characterized in that: A gap is provided between the baffle plate 1 (11) and the baffle plate 2 (12).

6. The hydraulic oil tank resistant to oil return pressure shock according to claim 2, characterized in that: The baffle plate 1 (11) is provided with more than one oil leakage hole (14).

7. The hydraulic oil tank resistant to oil return pressure shock according to any one of claims 1 to 6, characterized in that: The bottom of the oil tank body (2) is provided with an oil suction flange pipe (1), the upper end surface is provided with an oil return flange cover plate (6), an oil suction flange cover plate (4) and a breather (5) mounted on the oil suction flange cover plate (4), the oil return flange cover plate (6) is connected to the oil return cylinder (8), and the upper end surface of the oil suction flange pipe (1) is provided with an oil suction filter element (10).

8. The hydraulic oil tank resistant to oil return pressure shock according to claim 7, characterized in that: The outer surface of the oil tank body (2) is provided with a liquid level gauge (3), and a partition plate (9) is provided in the middle of the inner portion.

9. An engineering machine, characterized in that: The engineering machinery is provided with a hydraulic oil tank capable of resisting return oil pressure shock as described in any one of claims 1 to 6.

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