Method for prolonging oil insulation life of electric drive assembly and integrated filter

Abstract

The invention discloses an integrated filter capable of prolonging the oil insulation life of an electric drive assembly, which comprises a filter body, the filter body is an existing electric drive assembly oil filter product and comprises a shell, a filter element, a central pipe, an oil inlet and an oil outlet, a cavity for assembling the filter element and the central pipe is arranged in the shell, and the filter element and the central pipe are arranged in the cavity. The filter element is arranged on the outer side of the central pipe, and a gap is formed between the outer side of the filter element and the inner wall of the shell to form an oil cavity; the oil inlet is communicated with the oil cavity, and the oil outlet is communicated with the upper part of the central pipe; the device further comprises an adsorbent, and the adsorbent is installed on the upper portion of the center pipe. The device has the advantages that the structure is simple, improvement is convenient, metal ions in electric drive assembly oil can be adsorbed, and the oil insulation service life of the electric drive assembly is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of electric drive assembly oil filters, and in particular to a method for extending the insulation life of electric drive assembly oil and an integrated filter. Background Art

[0002] The existing electric drive assembly of new energy electric vehicles has popularized oil-cooled motor technology. The motor and the reduction box share a cavity, and the electric drive assembly oil lubricates the reduction box and cools the motor at the same time. According to this application requirement, the electric drive assembly oil needs good insulation performance, copper corrosion resistance and extreme pressure and wear resistance. However, during the actual operation of the electric drive assembly, the motor copper wire or the reduction box will inevitably produce wear and corrosion, and the content of metal elements such as copper and iron in the lubricating oil will increase. These metal elements exist in the form of metal ions or metal particles with extremely small particle sizes and cannot be filtered by the filter element. The presence of metal elements will form an "electric bridge" under the action of the electric field, resulting in a decrease in the insulation effect of the lubricating oil. Studies have shown that metal ions in lubricating oil, especially copper ions, will seriously affect the insulation performance of the electric drive assembly oil, thereby affecting the service life of the oil, and may even cause the positive and negative poles of the motor to break down, damage the motor, and even endanger driving safety. There is no literature in the prior art that discloses the "electric bridge" phenomenon formed by metal debris in the electric drive assembly oil filter.

[0003] Unlike traditional automatic transmission oil, traditional automatic transmission oil extends the oil change mileage by adding additives, such as more antioxidants, extreme pressure anti-wear agents, and detergent dispersants. The purpose of extending the oil change mileage cannot be achieved by increasing the amount of additives in electric drive assembly oil. The extreme pressure anti-wear agent in gear oil is harmful to copper. Adding too much will corrode copper wire. Therefore, the electric drive assembly oil also needs to increase the metal deactivator to ensure that the metal is not corroded. However, the working principle of the extreme pressure anti-wear agent of sulfur phosphide is to react with the metal to form a protective layer to achieve the purpose of extreme pressure and anti-wear. This leads to the method of extending the oil change mileage by increasing the amount of additives. There is a limit, that is, the balance point between the metal deactivator and the extreme pressure anti-wear agent. In general, the method of using additives to adjust the life of oil products has limitations and is difficult to operate.

[0004] At present, additives are generally added to oil products to extend the service life of oil products. For example, the existing patent document CN111363607A discloses an ultra-long-life engine oil and its preparation method, which, by compounding five base oils, makes the engine oil have good shear stability, does not reduce viscosity, does not produce sludge, is resistant to high and low temperatures, is universal in winter and summer, has little evaporation loss, and does not lose oil, thereby achieving the effect of extending the service life of the engine oil, reducing the number of oil changes, and greatly reducing the oil consumption of the engine oil.

[0005] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0006] The (main) purpose of the present invention is to propose an integrated filter which can eliminate factors affecting the service life of oil products by physical methods, adsorb metal ions in electric drive assembly oil, and improve the insulation life of electric drive assembly oil.

[0007] To this end, the present invention provides a method for extending the oil insulation life of an electric drive assembly and an integrated filter.

[0008] Preferably, the present invention may also have the following technical features:

[0009] An integrated filter for extending the oil insulation life of an electric drive assembly comprises a filter body, wherein the filter body is an existing electric drive assembly oil filter product, and comprises a shell, a filter element, a center tube, an oil inlet and an oil outlet, wherein the interior of the shell is provided with a cavity for assembling the filter element and the center tube, and the filter element is arranged on the outside of the center tube, and there is a gap between the outside of the filter element and the inner wall of the shell to form an oil cavity; the oil inlet is connected to the oil cavity, and the oil outlet is connected to the upper part of the center tube; and an adsorbent is also included, and the adsorbent is installed on the upper part of the center tube.

[0010] Furthermore, the adsorbent is in a granular form, and its surface has a porous structure, and is a porous material.

[0011] Furthermore, it also includes a metal mesh bag, in which a plurality of the adsorbent particles are wrapped, and the pore size of the metal mesh bag is smaller than the particle size of the adsorbent particles.

[0012] Furthermore, the metal net bag is made of stainless steel or aluminum alloy.

[0013] Furthermore, the metal net bag is fixed to the central tube by snapping or welding.

[0014] Furthermore, the adsorbent is a modified Y-type molecular sieve, and the modified Y-type molecular sieve is a FAU structure molecular sieve with a silicon-aluminum ratio of 1.5-3.

[0015] Furthermore, the adsorbent is one of γ-alumina, type A silica gel and 801 adsorbent.

[0016] Furthermore, it also includes a magnetic attraction ring, which is installed at the lower part of the inner wall of the shell.

[0017] Furthermore, an annular groove is provided on the inner wall of the shell to assemble the magnetic attraction ring.

[0018] Furthermore, the magnetic attraction ring is a magnet.

[0019] A method for extending the insulation life of electric drive assembly oil comprises the above-mentioned integrated filter, and the integrated filter is used to adsorb metal ions in the electric drive assembly oil.

[0020] Compared with the prior art, the beneficial effects of the present invention include: after the electric drive assembly oil containing impurities, metal particles and metal ions enters the electric drive assembly oil filter, the magnetic metal grinding chips are first adsorbed by the magnetic adsorption ring, and then the mechanical impurities are filtered out by the filter paper of the filter element. After the electric drive assembly oil is filtered, it enters the central tube and is further adsorbed by the adsorbent to further reduce the metal ion content in the electric drive assembly oil. In this way, the content of mechanical impurities, metals and metal ions in the electric drive assembly oil coming out of the electric drive assembly oil filter is greatly reduced, and the oil maintains good insulation properties, thereby increasing the service life of the oil. Adding a magnetic adsorption ring and an adsorbent to the filter is convenient for modification and low in cost, and the magnetic adsorption ring, the adsorbent and the filter have the same service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a partial structural schematic diagram of the present invention.

[0023] Figure 3 This is a diagram showing the adsorption effect of the modified Y-type molecular sieve, γ-alumina, 801 adsorbent, and type A silica gel on copper ions. The four materials are used to run the engine under the same bench environment, and the difference is that the materials used for the adsorbent are different.

[0024] Description of Reference Numerals

[0025] 1. Center tube; 2. Oil hole; 3. Filter element; 4. Shell; 5. Magnetic adsorption ring; 6. Metal net bag; 7. Adsorbent. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with specific implementations and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present invention and its application.

[0027] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts unless otherwise specifically stated.

[0028] like Figures 1 to 3An integrated filter for extending the insulation life of electric drive assembly oil is shown, including a filter body, the filter body is an existing electric drive assembly oil filter product, which includes a housing 4, a filter element 3, a center tube 1, an oil inlet and an oil outlet, the interior of the housing 4 is provided with a cavity for assembling the filter element 3 and the center tube 1, and the filter element 3 is arranged on the outside of the center tube 1, and there is a gap between the outside of the filter element 3 and the inner wall of the housing 4, forming an oil chamber 8. The oil inlet is connected to the oil chamber, and the oil outlet is connected to the upper part of the center tube 1. The electric drive assembly oil enters the oil chamber 8 through the oil inlet, then passes through the filter element 3 into the center tube 1, and then flows from the oil outlet to the moving parts to be lubricated. It also includes an adsorbent 7, which is installed on the upper part of the central tube 1, preferably near the connection between the central tube 1 and the oil outlet pipe, so that most of the electric drive assembly oil passes through the adsorbent 7 before flowing into the pipeline of the oil outlet, and then adsorbs the copper ions in the electric drive assembly oil, thereby reducing the content of metal / metal ions in the electric drive assembly oil, maintaining the oil product with good insulation performance, and avoiding the formation of the "bridge" phenomenon. Preferably, the adsorbent 7 is granular, and its surface has a porous structure, and is a porous material. It also includes a metal net bag 6, in which a plurality of adsorbent particles are wrapped, and the pore size of the metal net bag 6 is smaller than the particle size of the adsorbent particles, so that the adsorbent 7 particles are confined in the metal net bag 6. More specifically, the metal net bag 6 is made of stainless steel or aluminum alloy, and is fixed to the central tube 1 by a metal buckle. The tube wall of the central tube 1 is provided with a plurality of oil holes 2 for oil penetration, and the metal buckle is connected to the central tube 1 by means of the oil holes 2. Alternatively, the metal net bag 6 and the central tube 1 are welded and fixed.

[0029] In some embodiments, the adsorbent 7 is a modified Y-type molecular sieve, which is a FAU structure molecular sieve with a silicon-aluminum ratio of 1.5 to 3, as an existing material. The modified Y-type molecular sieve has a poor adsorption effect on oxidants in the lubricating oil, does not reduce the anti-oxidation performance of the lubricating oil, and does not need to add antioxidants to the lubricating oil.

[0030] In other optional embodiments of adsorbents for removing copper ions, the adsorbent 7 is one of γ-alumina, type A silica gel and 801 adsorbent, and the adsorption effect on copper ions is: modified Y-type molecular sieve = γ-alumina> 801 adsorbent> type A silica gel. However, γ-alumina, type A silica gel and 801 adsorbent will also adsorb antioxidants in the lubricating oil during the adsorption of copper ions, resulting in a decrease in the anti-oxidation effect of the lubricating oil. Therefore, using modified Y-type molecular sieve to adsorb copper ions is a preferred embodiment.

[0031] In the above, when the working temperature of the electric drive assembly oil filter is 55-65°C, specifically when the working temperature of the electric drive assembly oil filter is 58-62°C, the modified Y-type molecular sieve has the best adsorption effect on copper ions in the electric drive assembly oil.

[0032] In a preferred embodiment, a magnetic adsorption ring 5 is also included. The magnetic adsorption ring 5 is a circular ring structure and is installed at the lower part of the inner wall of the shell 4. The inner wall of the shell 4 is provided with an annular groove to assemble the magnetic adsorption ring. The magnetic adsorption ring can not only adsorb magnetic particles such as iron filings in the electric drive assembly oil, but also play an early anti-interference role, preventing iron elements and copper elements from forming competitive adsorption in the modified Y-type molecular sieve, and reducing the ability to adsorb copper ions. The magnetic adsorption ring is a ring magnet.

[0033] In the above, after the electric drive assembly oil with impurities, metal particles and metal ions enters the electric drive assembly oil filter, the magnetic metal grinding chips are first adsorbed by the magnetic adsorption ring 5, and then the mechanical impurities are filtered out by the filter paper of the filter element 3. After the filtered electric drive assembly oil enters the central tube 1, it is further adsorbed by the adsorbent 7 to further reduce the metal ion content in the electric drive assembly oil. In this way, the mechanical impurities, metals and metal ion contents of the electric drive assembly oil coming out of the electric drive assembly oil filter are greatly reduced, and the oil maintains good insulation performance, thereby increasing the service life of the oil.

[0034] A method for extending the insulation life of electric drive assembly oil includes the above-mentioned integrated filter, and the integrated filter is used to adsorb metal ions in the electric drive assembly oil. Preferably, the adsorbent and the magnetic adsorption ring 5 adsorb iron ions and copper ions, thereby reducing the metal ions in the electric drive assembly oil and avoiding the "bridge" phenomenon.

[0035] Those skilled in the art will appreciate that numerous variations to the above description are possible, and that the examples and figures are intended only to describe one or more specific implementations.

[0036] Although what is considered as exemplary embodiments of the present invention has been described and described, it will be understood by those skilled in the art that various changes and substitutions may be made thereto without departing from the spirit of the present invention. In addition, many modifications may be made to adapt specific situations to the teachings of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but the present invention may also include all embodiments and their equivalents that fall within the scope of the present invention.

Claims

1. An integrated filter for extending the oil insulation life of an electric drive assembly, comprising a filter body including a housing, a filter element, a center tube, an oil inlet and an oil outlet, wherein a cavity for assembling the filter element and the center tube is provided inside the housing, and the filter element is arranged outside the center tube, and a gap is provided between the outside of the filter element and the inner wall of the housing to form an oil cavity; the oil inlet is connected to the oil cavity, and the oil outlet is connected to the upper part of the center tube; the characteristics are: The invention also includes an adsorbent installed on the upper part of the central tube.

2. An integrated filter for extending the oil insulation life of an electric drive assembly as claimed in claim 1, characterized in that: The adsorbent is in a granular form, and its surface has a porous structure, and is a porous material.

3. An integrated filter for extending the oil insulation life of an electric drive assembly as claimed in claim 2, characterized in that: It also includes a metal mesh bag, in which a plurality of the adsorbent particles are wrapped, and the pore size of the metal mesh bag is smaller than the particle size of the adsorbent particles.

4. An integrated filter for extending the oil insulation life of an electric drive assembly as claimed in claim 3, characterized in that: The metal net bag is made of stainless steel or aluminum alloy.

5. An integrated filter for extending the oil insulation life of an electric drive assembly as claimed in claim 4, characterized in that: The metal net bag is fixed on the central tube by buckling or welding.

6. An integrated filter for extending the oil insulation life of an electric drive assembly as claimed in claim 2, characterized in that: The adsorbent is a modified Y-type molecular sieve, and the modified Y-type molecular sieve is a FAU structure molecular sieve with a silicon-aluminum ratio of 1.5-3.

7. An integrated filter for extending the oil insulation life of an electric drive assembly as claimed in claim 2, characterized in that: The adsorbent is one of γ-alumina, type A silica gel and 801 adsorbent.

8. An integrated filter for extending the oil insulation life of an electric drive assembly as claimed in claim 1, characterized in that: It also includes a magnetic attraction ring, which is installed on the lower part of the inner wall of the shell.

9. An integrated filter for extending the oil insulation life of an electric drive assembly as claimed in claim 8, characterized in that: The inner wall of the shell is provided with an annular groove for assembling the magnetic attraction ring.

10. A method for extending the insulation life of electric drive assembly oil, characterized by: The integrated filter according to claim 1 is included, and the integrated filter is used to adsorb metal ions in the electric drive assembly oil.

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