阅读说明：本技术 一种掘进机类闭式液压系统 (Closed hydraulic system of development machine ) 是由 丁振华 卢明亮 刘兴利 吕振开 冯欣 姜光辉 华正然 孙鹏飞 张然 于 2020-12-08 设计创作，主要内容包括：本发明公开了一种掘进机类闭式液压系统,包括双滤芯结构的空气过滤器、负压报警传感器和油箱,所述油箱上表面安装有双滤芯结构的空气过滤器、负压报警传感器,双滤芯结构的空气过滤器包括过滤器外壳、外层滤芯、内层精滤芯、底座,底座安装与油箱的上表面,底座上端安装有过滤器外壳,过滤器外壳内设有外层滤芯,外层滤芯内设有内层精滤芯。本发明在油箱中设置高抗污染空气过滤器,增加空气过滤器纳污能力,提高空气过滤的可靠性,确保液压油箱的清洁度,延长使用寿命。本发明设置负压报警装置,形成闭环控制,在空气过滤器堵塞的情况下,及时报警提示更换,避免产生故障。(The invention discloses a heading machine closed hydraulic system which comprises an air filter with a double-filter-element structure, a negative pressure alarm sensor and an oil tank, wherein the upper surface of the oil tank is provided with the air filter with the double-filter-element structure and the negative pressure alarm sensor, the air filter with the double-filter-element structure comprises a filter shell, an outer-layer filter element, an inner-layer fine filter element and a base, the base is arranged on the upper surface of the oil tank, the upper end of the base is provided with the filter shell, the outer-layer filter element is arranged in the filter shell, and the inner-layer fine filter element is. According to the invention, the high-pollution-resistance air filter is arranged in the oil tank, so that the pollutant carrying capacity of the air filter is increased, the reliability of air filtration is improved, the cleanliness of the hydraulic oil tank is ensured, and the service life is prolonged. The invention is provided with the negative pressure alarm device to form closed-loop control, and can alarm and prompt replacement in time under the condition that the air filter is blocked, thereby avoiding generating faults.)

1. The utility model provides a entry driving machine class closed hydraulic system, includes air cleaner (1), negative pressure alarm sensor (2), oil tank (3) of two filter core structures, a serial communication port, oil tank (3) upper surface mounting has air cleaner (1) and negative pressure alarm sensor (2) of two filter core structures, and wherein air cleaner (1) of two filter core structures includes filter housing (4), outer filter core (5), inlayer essence filter core (6) and base (7), and base (7) are installed in the upper surface of oil tank (3), and filter housing (4) are installed to base (7) upper end, are equipped with outer filter core (5) in filter housing (4), are equipped with inlayer essence filter core (6) in outer filter core (5).

2. The closed hydraulic system of the heading machine according to claim 1, wherein the filtration precision of the outer filter element (5) is 20um, and the filtration precision of the inner fine filter element (6) is 10 um.

3. A closed hydraulic system of a heading machine based on claim 1, characterized in that: the working principle of the hydraulic system is as follows: produce the jam when air cleaner (1) of two filter core structures is used for a long time, oil tank (3) are obstructed with external circulation of air, oil tank (3) inside will form the negative pressure, negative pressure alarm sensor (2) warning suggestion this moment, change air cleaner (1) of two filter core structures, if not change, negative pressure sensor (2) can detect oil tank (3) interior negative pressure, give the electrical system controller with negative pressure signal transmission, the controller can be according to negative pressure signal, send the instruction of shutting down and make equipment oil pump motor stop work, air cleaner (1) of avoiding two filter core structures continue to use under the ineffective effect, comparatively thick dust impurity of granule is filtered in outer filter core (5), comparatively meticulous dust impurity is filtered in inlayer fine filter core (6).

Technical Field

The invention relates to the technical field of hydraulic systems, in particular to a closed hydraulic system of a heading machine.

Background

The working condition of the development machine is quite severe, a large amount of coal dust exists in the working environment, and the highest concentration can reach 800-³And the coal dust can enter the oil tank through an air filter of the hydraulic oil tank, and the polluted hydraulic oil causes the fault of the hydraulic system polluted by the hydraulic system. The cleanliness control of an oil tank of a hydraulic system of the existing heading machine is to arrange an air filter on the upper part of the oil tank, filter out impurities such as coal dust in the air through a filter element of the air filter and keep the hydraulic system clean.

The prior art has the following defects: 1. the oil tank of entry driving machine of prior art carries out the circulation of air through air cleaner and outside and is mutual, and current air cleaner product is not suitable for high concentration dust environment, and the filter core blocks up easily, loses filter effect after the filter core blocks up, and local conquassation can appear in the filter core, leads to the dust to get into the inside hydraulic system that causes of oil tank and pollutes. 2. Closed-loop control can not be made, the existing air filter has no blocking alarm device, and the blocking cannot be found and replaced in time, if the replacement is not in time, the air can not be supplemented into the oil tank in time, negative pressure is formed in the oil tank, and the oil pump is vacuumed to cause damage. Therefore, the invention provides a closed hydraulic system of a heading machine, which aims to solve the problems in the background technology.

Disclosure of Invention

The invention aims to provide a closed hydraulic system of a heading machine, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a entry driving machine class closed hydraulic system, includes air cleaner, negative pressure alarm sensor, the oil tank of two filter core structures, surface mounting has air cleaner, the negative pressure alarm sensor of two filter core structures on the oil tank, and air cleaner of two filter core structures includes filter housing, outer filter core, inlayer essence filter core, base, and the filter housing is installed to the upper end of base installation and the upper surface of oil tank, is equipped with outer filter core in the filter housing, is equipped with inlayer essence filter core in the outer filter core.

As a further scheme of the invention, the filtering precision of the outer-layer filter element is 20um, and the filtering precision of the inner-layer fine filter element is 10 um.

Compared with the prior art, the invention has the beneficial effects that: 1. according to the invention, the high-pollution-resistance air filter is arranged in the oil tank, so that the pollutant carrying capacity of the air filter is increased, the reliability of air filtration is improved, the cleanliness of the hydraulic oil tank is ensured, and the service life is prolonged.

2. The invention is provided with the negative pressure alarm device to form closed-loop control, and can alarm and prompt replacement in time under the condition that the air filter is blocked, thereby avoiding generating faults.

Drawings

Fig. 1 is a schematic structural diagram of a closed hydraulic system of a heading machine.

Fig. 2 is a schematic structural diagram of an air filter with a double-filter-element structure in a heading machine closed hydraulic system.

In the figure: 1. the air filter has a double-filter-element structure; 2. a negative pressure alarm sensor; 3. an oil tank; 4. a filter housing; 5. an outer layer filter element; 6. inner fine filter element; 7. a base.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, in the embodiment of the invention, a heading machine closed hydraulic system includes an air filter 1 with a double-filter-element structure, a negative pressure alarm sensor 2 and an oil tank 3, the air filter 1 with the double-filter-element structure and the negative pressure alarm sensor 2 are mounted on the upper surface of the oil tank 3, the air filter 1 with the double-filter-element structure includes a filter housing 4, an outer-layer filter element 5, an inner-layer fine filter element 6 and a base 7, the base 7 is mounted on the upper surface of the oil tank 3, the filter housing 4 is mounted on the upper end of the base 7, the outer-layer filter element 5 is arranged in the filter housing 4, the inner-layer fine filter element 6 is arranged in the outer-layer filter element 5, the filtering accuracy of the outer-layer filter element 5 is.

The working principle of the invention is as follows: when the air filter 1 of two filter core structures is used for a long time, produce the jam, the circulation of air of oil tank 3 and external world is obstructed, 3 inside negative pressures that will form of oil tank, negative pressure alarm sensor 2 warning suggestion this moment, change the air filter 1 of two filter core structures, if not change, negative pressure sensor 2 can detect the interior negative pressure of oil tank 3, give the electrical system controller with negative pressure signal transmission, the controller can be according to negative pressure signal, send out the instruction of shutting down and make equipment oil pump motor stop work, avoid the air filter 1 of two filter core structures to continue to use under the inefficacy, outer filter core 5 filters comparatively coarse dust impurity of granule, comparatively meticulous dust impurity is filtered to inlayer fine filter 6.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.