Circulating cooling and filtering system of oil tank

Abstract

The utility model provides a circulating cooling and filtering system of an oil tank, which comprises a hydraulic oil circuit, and the hydraulic oil circuit comprises an oil pump, a first-stage filter, a second-stage filter, a third-stage filter and a cooling module. The first-stage filter is arranged between the oil inlet end of the oil pump and the oil outlet end of the oil tank, the oil outlet end of the oil pump is connected with the second-stage filter through an oil outlet path, the second-stage filter is connected with the third-stage filter through the oil outlet path, and the third-stage filter is connected with the oil return end of the oil tank. A cooling module is arranged on an oil outlet path between the second-stage filter and the third-stage filter, the cooling module comprises a heat exchanger and a circulating water supply device, and the heat exchanger is arranged on the oil outlet path and connected with the circulating water supply device; by means of the structure, multi-stage filtering of hydraulic oil in the oil tank is achieved, the flowing efficiency of the hydraulic oil is high, and the filtering precision is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil tank oil way, specifically relates to a circulating cooling filter system of oil tank. BACKGROUND

[0002] The main function of the hydraulic system is to convert mechanical energy into hydraulic energy through hydraulic transmission, thereby completing various functions such as lifting, pushing and pulling, and rotating. The hydraulic system is composed of power elements, execution elements, control elements, auxiliary elements (accessories) and hydraulic oil. The hydraulic oil plays the role of transmitting pressure, lubrication, cooling and sealing in the hydraulic system. The hydraulic oil is generally stored in the hydraulic oil tank and the hydraulic circuit. With the operation of the engineering equipment, the hydraulic oil will be contaminated by metal powder, various oxides and other particulate matter. At the same time, the hydraulic oil flows between the power elements and the execution elements for a long time, which can easily cause the temperature to rise.

[0003] As disclosed in the patent document with Chinese patent application number 202410957175.5 and publication date 2024.09.17, a hydraulic oil filtering device for engineering machinery is disclosed, which includes a hydraulic oil filtering device for engineering machinery, used for filtering hydraulic oil in the hydraulic system of the engineering machinery. The hydraulic system includes a hydraulic oil tank, and the hydraulic oil filtering device includes a switching valve group, an oil filter and an oil storage tank. The oil filter and the oil storage tank are both connected to the switching valve group. When the hydraulic oil filtering device filters the hydraulic oil, the switching valve group is connected to the hydraulic oil tank through a pipeline. The hydraulic oil filtering device has a first oil filtering path and a second oil filtering path. The first oil filtering path is for the hydraulic oil to flow from the hydraulic oil tank, through the switching valve group, the oil filter, and then through the switching valve group to the oil storage tank. The second oil filtering path is for the hydraulic oil to flow from the oil storage tank, through the switching valve group, the oil filter, and then through the switching valve group to the hydraulic oil tank. The hydraulic oil filtering device for engineering machinery has a short operation time and high filtering efficiency.

[0004] As the prior art in the above-mentioned document, only one filtration is used. If the hydraulic oil needs to be filtered more carefully, a larger precision filtering device is required. However, particulate matter usually contains both large and small particles. If fine filtration is required, a larger precision filtering device is used to filter small particles, but this will cause large particles to block, making it difficult for the hydraulic oil to flow quickly through the filtering device, thereby affecting efficiency. Moreover, the problem of high oil temperature caused by filtration or other factors is not considered. SUMMARY

[0005] The utility model provides a circulating cooling filter system of oil tank, can realize to the hydraulic oil of oil tank carries out multistage filtration, makes the flow efficiency of hydraulic oil be high, and precision of filtration is high, and still can realize the cooling of hydraulic oil.

[0006] To achieve the above object, the technical scheme of the utility model is: a circulating cooling filter system of oil tank, including hydraulic oil circuit, the hydraulic oil circuit includes oil pump, primary filter, secondary filter, tertiary filter and cooling module, the primary filter sets up between the oil inlet end of oil pump and the oil outlet end of oil tank, the oil outlet end of oil pump is connected secondary filter through the oil outlet oil circuit, the secondary filter is connected with tertiary filter through the oil outlet oil circuit, and the tertiary filter is connected the oil return end of oil tank, and the cooling module is equipped on the oil outlet oil circuit between the secondary filter and the tertiary filter, the cooling module includes heat exchanger and circulating water supply device, the heat exchanger sets up on the oil outlet oil circuit, and the heat exchanger is connected circulating water supply device, and the water supply pipeline of circulating water supply device is connected one end of heat exchanger, and the other end of heat exchanger is connected the return pipeline of circulating water supply device, the primary filter is used for filtering large particle contaminants, the tertiary filter is used for filtering small particle contaminants, and the secondary filter is used for filtering particle contaminants between large particle contaminants and small particle contaminants.

[0007] The above structure, by setting hydraulic oil circuit on the oil tank, thereby through the oil pump from the oil tank carries out oil pumping, further makes hydraulic oil in turn through primary filter, secondary filter and tertiary filter, finally flows back to the oil tank and realizes hydraulic oil circulation, thereby, when hydraulic oil passes through filter, can be filtered through filter, and because the tertiary filter is set, the filtering effect of hydraulic oil is better, and the filtering precision is higher, because the primary filter is used for filtering large particle contaminants, small particle contaminants can directly pass through the primary filter, thereby reducing the plugging degree of the primary filter, and through the hierarchical filtering of the secondary filter and the tertiary filter, the efficiency of the hydraulic oil flowing through the filter is not easily affected by the size of the particle contaminants, and the heat exchanger is further provided on the oil outlet oil circuit, and the circulating water supply device constantly supplies water to the heat exchanger, thereby making the heat of the hydraulic oil be cooled through the cold and hot exchange of the heat exchanger, so as to ensure that the temperature of the hydraulic oil of the oil tank is not too high, thereby ensuring that when the hydraulic oil of the oil tank is applied to the hydraulic oil circuit of the equipment, the work is not easily affected by the high temperature of the hydraulic oil.

[0008] Further, the circulating water supply device includes a water tower, a water pump, and a manual on-off valve. The water pump is arranged in the water tower. The water outlet end of the water pump is connected to one end of the heat exchanger through a water supply pipeline. The other end of the heat exchanger is connected to the return pipeline of the water tower. The manual on-off valve is arranged on the water supply pipeline.

[0009] The above arrangement realizes water circulation by pumping water from the water tower to the heat exchanger through the water supply pipeline and back to the water tower through the return pipeline, thereby ensuring that the heat of the heat exchanger can be taken away when the water passes through the heat exchanger, thereby cooling the oil outlet pipeline and reducing the temperature of the hydraulic oil.

[0010] Further, a water supply check valve is arranged on the return pipeline, a water inlet end of the water supply check valve is connected with the heat exchanger through the return pipeline, and a water outlet end of the water supply check valve is connected with the water tower through the return pipeline.

[0011] The above arrangement places the water in the return pipeline back to the heat exchanger through the arrangement of the water supply check valve.

[0012] Further, the filtering precision of the first filter is less than that of the second filter, and the filtering precision of the second filter is less than that of the third filter.

[0013] The above arrangement enables the hydraulic oil to be filtered in multiple stages through the arrangement of filters with different filtering precisions, so that the filtering precision of the hydraulic oil is ensured to be higher while the flow efficiency of the hydraulic oil is not affected.

[0014] Further, the number of the second filters is two, and the two second filters are connected in series.

[0015] The above arrangement enables the particle size at the intermediate stage to be filtered multiple times.

[0016] Further, the filtering particle size of the first filter is 50-100 μm, the filtering particle size of the second filter is 10-50 μm, and the filtering particle size of the third filter is 5-10 μm.

[0017] The above arrangement ensures that the filtering particle size can be filtered more reliably. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a schematic diagram of a hydraulic oil circuit of the present application. DETAILED DESCRIPTION

[0019] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0020] As shown in Fig. 1, the hydraulic oil circuit of the present application comprises a heat exchanger, a water tower, a return pipeline, a first filter, a second filter and a third filter. Figure 1As shown, a circulating cooling filter system of an oil tank comprises a hydraulic oil circuit, the hydraulic oil circuit comprises an oil pump 1, a first filter 2, a second filter 3, a third filter 4 and a cooling module 5; the first filter 2 is arranged between an oil inlet end of the oil pump 1 and an oil outlet end 02 of the oil tank 01, an oil outlet end of the oil pump 1 is connected with the second filter 3 through an oil outlet oil circuit 11, the second filter 3 is connected with the third filter 4 through the oil outlet oil circuit 11, the third filter 4 is connected with an oil return end 03 of the oil tank 01, the cooling module 5 is arranged on the oil outlet oil circuit 11 between the second filter 3 and the third filter 4, the cooling module 5 comprises a heat exchanger 51 and a circulating water supply device, the heat exchanger 51 is arranged on the oil outlet oil circuit 11, the heat exchanger 51 is connected with the circulating water supply device 52, a water supply pipeline 501 of the circulating water supply device 52 is connected with one end of the heat exchanger 51, the other end of the heat exchanger 51 is connected with a return pipeline 502 of the circulating water supply device 52, the first filter 2 is used for filtering large-particle pollutants, the third filter 4 is used for filtering small-particle pollutants, and the second filter 3 is used for filtering particle pollutants between the large-particle pollutants and the small-particle pollutants; the filtering precision of the first filter 2 is less than the filtering precision of the second filter 3; the filtering precision of the second filter 3 is less than the filtering precision of the third filter 4. By arranging filters with different filtering precisions, the hydraulic oil can be filtered in multiple stages, so that the filtering precision of the hydraulic oil is higher while the flow efficiency of the hydraulic oil is not affected. In the embodiment, the filtering particle diameter of the first filter 2 is 50-100 μm, the filtering particle diameter of the second filter 3 is 10-50 μm, and the filtering particle diameter of the third filter 4 is 5-10 μm.

[0021] In the embodiment, the first filter and the second filter are existing filters, which will not be described here.

[0022] The circulating water supply device 52 comprises a water tower 53, a water pump 54 and a manual switch valve 55, the water pump 54 is arranged in the water tower 53, a water outlet end of the water pump 54 is connected with one end of the heat exchanger 51 through the water supply pipeline 501, the other end of the heat exchanger 51 is connected with the water tower 53 through the return pipeline 502, and the manual switch valve 55 is arranged on the water supply pipeline 501. Water is pumped from the water tower 53 to one end of the heat exchanger 51 through the water supply pipeline 501 by the water pump 54, and then flows back to the water tower 53 from the other end of the heat exchanger 51 through the return pipeline 502, so as to realize water circulation, thereby ensuring that the heat of the heat exchanger 51 can be taken away when water passes through the heat exchanger 51, so as to cool the oil outlet pipeline 11 and reduce the temperature of the hydraulic oil.

[0023] A water supply check valve 56 is arranged on the return pipeline 502, the water inlet end of the water supply check valve 56 is connected with the heat exchanger 51 through the return pipeline 502, and the water outlet end of the water supply check valve 56 is connected with the water tower 53 through the return pipeline 502. The water supply check valve 56 is arranged to prevent the water in the return pipeline 502 from flowing back to the heat exchanger.

[0024] The working principle of the utility model is: by setting hydraulic oil circuit on oil tank 01, thereby through oil pump 1 from oil tank 01 carry out oil pumping, further make hydraulic oil pass through primary filter 2, secondary filter 3 and tertiary filter 4 in turn, finally flow back to oil tank 01 and realize hydraulic oil circulation, thereby, when hydraulic oil passes through filter, can pass through filter and filter, and because set tertiary filter, make the filtering effect of hydraulic oil better, and the filtering precision is higher, because primary filter 2 is used for filtering large particle pollutants, in this way, small particle pollutants can directly pass through primary filter 2, thereby reduce the degree of primary filter 2 blockage, simultaneously pass through the level filtering of secondary filter 3 and tertiary filter 4, make hydraulic oil not easy because the size of particle pollutants influence the efficiency of flowing through filter, simultaneously, on oil outlet oil circuit 11 still be equipped with heat exchanger 51, through circulating water supply device 52 constantly to heat exchanger 51 carry out circulating water supply, thereby make the heat of hydraulic oil cool down through the cold and hot exchange of heat exchanger 51, thereby guarantee the temperature of oil tank 01 hydraulic oil not too high, thereby guarantee when oil tank 01 hydraulic oil is applied to the hydraulic oil circuit of equipment, not easy because the temperature of hydraulic oil is high and influence work.

Claims

1. A circulating cooling filtration system for an oil tank comprising a hydraulic oil circuit, characterized in that: The hydraulic oil circuit comprises an oil pump, a primary filter, a secondary filter, a tertiary filter and a cooling module; the primary filter is arranged between an oil inlet end of the oil pump and an oil outlet end of an oil tank, an oil outlet end of the oil pump is connected to the secondary filter through an oil outlet pipeline, the secondary filter is connected to the tertiary filter through the oil outlet pipeline, the tertiary filter is connected to an oil return end of the oil tank, the cooling module is arranged on the oil outlet pipeline between the secondary filter and the tertiary filter, the cooling module comprises a heat exchanger and a circulating water supply device, the heat exchanger is arranged on the oil outlet pipeline, the heat exchanger is connected to the circulating water supply device, a water supply pipeline of the circulating water supply device is connected to one end of the heat exchanger, the other end of the heat exchanger is connected to a return pipeline of the circulating water supply device, the primary filter is used for filtering large-particle contaminants, the tertiary filter is used for filtering small-particle contaminants, and the secondary filter is used for filtering particle contaminants between the large-particle contaminants and the small-particle contaminants.

2. A circulating cooling filtration system for an oil tank as claimed in claim 1, wherein: The circulating water supply device comprises a water tower, a water pump and a manual switch valve, the water pump is arranged in the water tower, an outlet end of the water pump is connected to one end of the heat exchanger through the water supply pipeline, the other end of the heat exchanger is connected to the water tower through the return pipeline, and the manual switch valve is arranged on the water supply pipeline.

3. A circulating cooling filter system for an oil tank as claimed in claim 2, wherein: A water supply check valve is arranged on the return pipeline, an inlet end of the water supply check valve is connected to the heat exchanger through the return pipeline, and an outlet end of the water supply check valve is connected to the water tower through the return pipeline.

4. A circulating cooling filtration system for an oil tank as claimed in claim 1, wherein: The filtering precision of the primary filter is less than that of the secondary filter, and the filtering precision of the secondary filter is less than that of the tertiary filter.

5. A circulating cooling filter system for an oil tank as claimed in claim 1, wherein: The number of the secondary filters is two, and the two secondary filters are connected in series.

6. A circulating cooling filter system for an oil tank as claimed in claim 1, wherein: The filtering particle size of the primary filter is 50-100 μm, the filtering particle size of the secondary filter is 10-50 μm, and the filtering particle size of the tertiary filter is 5-10 μm.

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