阅读说明：本技术 一种润滑油氧化性能测试设备及其测试方法 (Lubricating oil oxidation performance testing equipment and testing method thereof ) 是由 沈丽新 朱佳清 钱炜 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种润滑油氧化性能测试设备及其测试方法,包括：设置在装配箱体内的检测组件,装配箱体通过隔板分为第一安装腔和第二安装腔,第一安装腔内设置高温油箱,第一安装腔左侧设置第二安装腔。检测组件包括：设置在第二安装腔底部的液压缸,液压缸通过液压柱连接装配板,装配板上方放置检测箱,检测箱右侧设置进油口和出油口,检测箱外壁设置中空隔层；第二安装腔顶部设置驱动电机,驱动电机下部设置驱动轴,检测箱上部设置轴承轮,轴承轮下端连接搅拌构件。在基于SH/T0193中标准试验方法的基础上进行优化改进,结合参照样品,不断积累润滑油的配方数据,能够进行新配方前期筛选、仿制样品对照等工作,从而不断优化产品。(The invention discloses a device and a method for testing the oxidation performance of lubricating oil, wherein the device comprises: the detection assembly is arranged in the assembly box body, the assembly box body is divided into a first installation cavity and a second installation cavity through a partition plate, a high-temperature oil tank is arranged in the first installation cavity, and the second installation cavity is arranged on the left side of the first installation cavity. The detection assembly comprises: the hydraulic cylinder is arranged at the bottom of the second mounting cavity and is connected with the assembling plate through a hydraulic column, the detection box is placed above the assembling plate, the right side of the detection box is provided with an oil inlet and an oil outlet, and the outer wall of the detection box is provided with a hollow interlayer; the top of the second installation cavity is provided with a driving motor, the lower part of the driving motor is provided with a driving shaft, the upper part of the detection box is provided with a bearing wheel, and the lower end of the bearing wheel is connected with a stirring component. Optimization and improvement are carried out on the basis of an SH/T0193 standard test method, and the formula data of the lubricating oil is continuously accumulated by combining a reference sample, so that the work of preliminary screening of a new formula, comparison of a simulated sample and the like can be carried out, and the product is continuously optimized.)

1. An apparatus for testing oxidation performance of lubricating oil, comprising: a detection component arranged in the assembly box body, which is characterized in that,

the assembly box body is divided into a first installation cavity and a second installation cavity through a partition plate, a high-temperature oil tank is arranged in the first installation cavity, an oil inlet pipe and an oil outlet pipe are arranged on the high-temperature oil tank, the left side of the first installation cavity is provided with the second installation cavity, and a detection assembly is arranged in the second installation cavity;

the detection assembly comprises: the hydraulic cylinder is arranged at the bottom of the second mounting cavity and is connected with an assembly plate through a hydraulic column, a detection box is placed above the assembly plate, an oil inlet and an oil outlet are formed in the right side of the detection box, a hollow interlayer is arranged on the outer wall of the detection box and is respectively communicated with the oil inlet and the oil outlet;

the top of the second installation cavity is provided with a driving motor, the lower part of the driving motor is provided with a driving shaft, the upper part of the detection box is provided with a bearing wheel, and the lower end of the bearing wheel is connected with a stirring component.

2. The apparatus for testing oxidation performance of lubricating oil according to claim 1, wherein: the bottom surface of the inner side of the detection box is provided with fixing blocks in a linear array mode, and the fixing blocks are used for fixing copper wires.

3. The apparatus for testing oxidation performance of lubricating oil according to claim 1, wherein: the drive shaft lower part sets up the joint arch, the bearing wheel upper surface sets up the joint groove, the joint detain with the joint groove is mutually supported.

4. The apparatus for testing oxidation performance of lubricating oil according to claim 1, wherein: the bottom surface of the detection box is provided with a plurality of guide bulges, the upper surface of the assembly plate is provided with a plurality of guide grooves, and the guide grooves are matched with the guide bulges.

5. The apparatus for testing oxidation performance of lubricating oil according to claim 1, wherein: the stirring member includes: and the stirring rod is fixed on the lower end face of the bearing wheel, and a plurality of stirring blades are arranged on the circumferential side face of the stirring rod.

6. The apparatus for testing oxidation performance of lubricating oil according to claim 1, wherein: the side of the partition board is provided with a matching groove, the surface of the matching groove is provided with a plurality of mounting holes, and the mounting holes are respectively used for fixing the oil inlet pipe and the oil outlet pipe.

7. The apparatus for testing oxidation performance of lubricating oil according to claim 1, wherein: the front part of the assembly box body is provided with a sealing door, and the sealing door is connected to the assembly box body through a precise hinge.

8. The apparatus for testing oxidation performance of lubricating oil according to claim 1, wherein: the front of the assembling box body is provided with a ventilator which is used for exchanging the air inside and outside the assembling box body.

9. The method for testing the equipment for testing the oxidation performance of the lubricating oil according to claim 1, characterized by comprising the following steps:

step S1: placing a copper wire on the fixed block, adding lubricating oil and a copper catalyst into the detection box, pushing the detection box above the hydraulic column until the buckle is buckled with the clamping groove, and extending the hydraulic column to drive the detection box to ascend until the stirring rod enters the detection box;

step S2: at the moment, the oil outlet pipe is tightly connected with the oil inlet, the oil inlet pipe is tightly connected with the oil outlet, the high-temperature oil tank circularly fills hot oil into the detection box until the preset temperature is reached and the temperature is kept unchanged, the stirrer is started to stir the lubricating oil in the detection box, and meanwhile, the ventilator is used for exchanging and assembling the air inside and outside the box body;

step S3: and (4) comparing and judging the acid value, viscosity, insoluble matter, catalyst weight gain and loss, and copper wire appearance of the oil product before and after the combination test to obtain the oxidability of the lubricating oil and various performance indexes of the lubricating oil.

10. The method for testing the equipment for testing the oxidation performance of the lubricating oil according to claim 9, wherein: in the step S2, the temperature is set to 140-180 ℃, the stirring time is 3-6 hours, and the stirring speed is 60-80 r/min.

Technical Field

The invention relates to the technical field of lubricating oil research and development, in particular to lubricating oil oxidation performance testing equipment and a testing method thereof.

Background

The lubricating oil is a liquid or semisolid lubricating agent used on various types of automobiles and mechanical equipment to reduce friction and protect machines and workpieces, and mainly plays roles in lubrication, cooling, rust prevention, cleaning, sealing, buffering and the like. The main components of the lubricating oil are base oil and additives. As the oil is used, the additives are gradually consumed, and the base oil is gradually oxidized. Oxidation of the lubricating oil is initiated by the generation of free radicals due to the action of light, heat, transition metals, and the like. The free radicals react with oxygen to produce peroxy radicals, the peroxy radicals react with other molecules to produce hydrogen peroxide and free radicals, and the hydrogen peroxide is further decomposed to produce oxidizing free radicals and peroxy radicals, thus forming a chain reaction. The end result of the chain reaction is the formation of ketones, aldehydes, organic acids, and finally the acid and reaction proceeds, thus forming sludge and varnish, which affects the lubrication effect.

Aging of the base oil, consumption of additives, formation of oxidation deposits are important indicators in determining the aging of transmission oil. The aging of the base oil is represented by the change of the kinematic viscosity of the new and old oils, the consumption of the additive has no index which can be directly measured, but can be represented by detecting the change of the acid value of the oil, and the formation of the oxidized deposit can be realized by the spot test and the oxidation tube rating of the evaluation test method. Currently, the evaluation methods related to the aging of lubricating oils are mainly oxidation stability measurement methods. The oxidation stability measurement method is generally based on the same principle, and generally involves introducing oxygen gas or purified and dried air directly into a sample, and measuring changes in indexes such as viscosity and acid value of the sample after a predetermined time at a predetermined temperature under the action of a catalyst such as a metal. The test conditions vary from one oil to another.

Most of the test methods have some defects, for example, the method GB/T12581 which is commonly used at present has a long test period, and the rapid detection of oil products cannot be realized; meanwhile, the lubricating oil evaluation method in the prior art cannot stably control the temperature, is not real in a simulated environment, and is difficult to obtain more accurate detection data, so that more accurate lubricating oil evaluation data are difficult to obtain. Therefore, a new lubricating oil evaluation apparatus and evaluation method are needed to improve the detection accuracy of lubricating oil.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides equipment and a method for testing the oxidation performance of lubricating oil.

In order to achieve the purpose, the invention adopts the technical scheme that: a lubricating oil oxidation performance test device and a test method thereof comprise: the detection assembly is arranged in the assembly box body, the assembly box body is divided into a first installation cavity and a second installation cavity through a partition plate, a high-temperature oil tank is arranged in the first installation cavity, an oil inlet pipe and an oil outlet pipe are arranged on the high-temperature oil tank, the second installation cavity is arranged on the left side of the first installation cavity, and the detection assembly is arranged in the second installation cavity.

The detection assembly comprises: the hydraulic cylinder is arranged at the bottom of the second mounting cavity and is connected with an assembly plate through a hydraulic column, a detection box is placed above the assembly plate, an oil inlet and an oil outlet are formed in the right side of the detection box, a hollow interlayer is arranged on the outer wall of the detection box and is respectively communicated with the oil inlet and the oil outlet; the top of the second installation cavity is provided with a driving motor, the lower part of the driving motor is provided with a driving shaft, the upper part of the detection box is provided with a bearing wheel, and the lower end of the bearing wheel is connected with a stirring component.

In a preferred embodiment of the invention, the inner bottom surface of the detection box is provided with fixing blocks in a linear array manner, and the fixing blocks are used for fixing copper wires.

In a preferred embodiment of the present invention, the driving shaft is provided with a locking protrusion at a lower portion thereof, the bearing wheel is provided with a locking groove at an upper surface thereof, and the locking buckle is engaged with the locking groove.

In a preferred embodiment of the invention, the bottom surface of the detection box is provided with a plurality of guide protrusions, the upper surface of the assembly plate is provided with a plurality of guide grooves, and the guide grooves are matched with the guide protrusions.

In a preferred embodiment of the present invention, the stirring member includes: and the stirring rod is fixed on the lower end face of the bearing wheel, and a plurality of stirring blades are arranged on the circumferential side face of the stirring rod.

In a preferred embodiment of the present invention, a fitting groove is formed on a side surface of the partition plate, a plurality of mounting holes are formed on a surface of the fitting groove, and the plurality of mounting holes are respectively used for fixing the oil inlet pipe and the oil outlet pipe.

In a preferred embodiment of the invention, a sealing door is arranged at the front part of the assembly box body, and the sealing door is connected to the assembly box body through a precise hinge.

In a preferred embodiment of the invention, a ventilator is arranged in front of the assembly box body and used for exchanging air inside and outside the assembly box body.

In a preferred embodiment of the present invention, the method comprises the following steps:

step S1: placing a copper wire on the fixed block, adding lubricating oil and a copper catalyst into the detection box, pushing the detection box above the hydraulic column until the buckle is buckled with the clamping groove, and extending the hydraulic column to drive the detection box to ascend until the stirring rod enters the detection box;

step S2: at the moment, the oil outlet pipe is tightly connected with the oil inlet, the oil inlet pipe is tightly connected with the oil outlet, the high-temperature oil tank circularly fills hot oil into the detection box until the preset temperature is reached and the temperature is kept unchanged, the stirrer is started to stir the lubricating oil in the detection box, and meanwhile, the ventilator is used for exchanging and assembling the air inside and outside the box body;

step S3: and (4) comparing and judging the acid value, viscosity, insoluble matter, catalyst weight gain and loss, and copper wire appearance of the oil product before and after the combination test to obtain the oxidability of the lubricating oil and various performance indexes of the lubricating oil.

In a preferred embodiment of the present invention, in the step S2, the temperature is set to 140-180 ℃, and the stirring time is 3-6 hours.

The invention solves the defects in the background technology, and has the following beneficial effects:

(1) the invention carries out optimization and improvement on the basis of a standard test method in SH/T0193, combines the comparison judgment of the acid value, the viscosity, the insoluble matter, the weight increase and loss of the catalyst and the appearance of copper wires of the oil product before and after the test, combines a reference sample, continuously accumulates the formula data of the lubricating oil, and can carry out the work of preliminary screening of a new formula, sample imitation comparison and the like, thereby continuously optimizing the product. On the other hand, the improved equipment has better applicability, can be suitable for common small and medium-sized laboratories, can be put into different markets required by new product development, and meets the requirements of more experimental conditions.

(2) According to the invention, the high-temperature oil tank is used for circularly supplying oil to the hollow interlayer of the detection box, so that the temperature of the lubricating oil in the detection box is always kept constant, the temperature fluctuation phenomenon is avoided, more accurate detection data can be obtained on the appearance of the copper wire and sediments in the lubricating oil liquid, namely, the performance data of the lubricating oil after oxidation is changed, and the accuracy of oil oxidation detection is effectively improved.

(3) The invention mainly establishes a basis on product early-stage research and formula adjustment, makes basic data research by combining actual bench test and application, can further judge the oxidation trend of oil products, guides product formula research by judging results, analyzes and compares test results, and changes performance data after oxidation to realize rapid performance comparison with reference samples, thereby realizing formula optimization of lubricating oil and obtaining lubricating oil products with better performance.

(4) According to the invention, through the stirring component arranged in the detection box, the working state of the lubricating oil can be accurately simulated, the obtained oxidation data of the lubricating oil is more real, and the occurrence of accidental errors is reduced, so that more accurate detection data can be obtained.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of an assembled housing according to a preferred embodiment of the present invention;

FIG. 2 is a schematic plan view of a preferred embodiment of the present invention;

fig. 3 is a perspective view of a detection box according to a preferred embodiment of the present invention.

Specifically, 100-assembling a box body, 110-a partition plate, 111-a matching groove, 112-a mounting hole, 120-a high-temperature oil tank, 130-an assembling plate, 131-a guide groove, 140-a driving shaft, 141-a clamping protrusion, 150-a driving motor, 160-a sealing door,

200-a detection box, 210-a hydraulic cylinder, 211-a hydraulic column, 220-a stirring member, 221-a stirring rod, 222-a stirring blade, 230-a bearing wheel, 231-a clamping groove, 240-a fixed block, 241-a copper wire, 250-an oil outlet, 260-a guide bulge, 270-a hollow interlayer and 280-an oil inlet.

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.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "oil level", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

As shown in fig. 1, a device and a method for testing oxidation performance of lubricating oil includes: the detection assembly of setting in assembly box 100, assembly box 100 divide into first installation cavity and second installation cavity through baffle 110, set up high temperature oil tank 120 in the first installation cavity, are provided with into oil pipe and play oil pipe on the high temperature oil tank 120, and first installation cavity left side sets up the second installation cavity, is provided with detection assembly in the second installation cavity.

In a preferred embodiment of the present invention, the high temperature oil tank 120 supplies oil to cyclically supply oil to the hollow partition 270 of the detection box 200, so that the temperature of the lubricating oil in the detection box 200 is always kept constant, and the temperature fluctuation phenomenon is avoided, so that the appearance of the copper wire 241 and the sediments in the lubricating oil can obtain more accurate detection data, i.e. the performance data of the lubricating oil after oxidation changes, and the accuracy of oil oxidation detection is effectively improved.

As shown in fig. 1, in a preferred embodiment of the present invention, a fitting groove 111 is formed on a side surface of a partition plate 110, a plurality of mounting holes 112 are formed on a surface of the fitting groove 111, an oil inlet pipe and an oil outlet pipe are respectively fixed through the mounting holes 112, a sealing door 160 is formed on a front portion of an assembly box 100, the sealing door 160 is connected to the assembly box 100 through a precision hinge, and the arrangement of bees can perform a certain heat preservation function in the assembly box 100 and ensure the cleanness and stability of the internal environment.

As shown in fig. 2 and 3, the detecting assembly includes: the hydraulic cylinder 210 is arranged at the bottom of the second mounting cavity, the hydraulic cylinder 210 is connected with the assembly plate 130 through a hydraulic column 211, the detection box 200 is placed above the assembly plate 130, the right side of the detection box 200 is provided with an oil inlet 280 and an oil outlet 250, the outer wall of the detection box 200 is provided with a hollow interlayer 270, and the hollow interlayer 270 is respectively communicated with the oil inlet 280 and the oil outlet 250; the top of the second installation cavity is provided with a driving motor 150, the lower part of the driving motor 150 is provided with a driving shaft 140, the upper part of the detection box 200 is provided with a bearing wheel 230, the lower end of the bearing wheel 230 is connected with a stirring member 220, and the stirring member 220 comprises: the stirring rod 221 is fixed on the lower end surface of the bearing wheel 230, and a plurality of stirring blades 222 are arranged on the circumferential side surface of the stirring rod 221.

In a preferred embodiment of the present invention, the stirring member 220 disposed in the detection box 200 can accurately simulate the operating state of the lubricant, so that the obtained oxidation data of the lubricant is more real, and the occurrence of accidental errors is reduced, thereby obtaining more accurate detection data, and meanwhile, the ventilator is used to exchange air inside and outside the assembly box 100, thereby further improving the authenticity of the operating environment of the lubricant and improving the accuracy of the oxidation detection data of the lubricant.

In a preferred embodiment of the present invention, the fixing blocks 240 are disposed on the inner bottom surface of the detection box 200 in a linear array manner, and the fixing blocks 240 are used for fixing the copper wires 241, so that the result is more universal by performing multiple sets of simultaneous detection, thereby improving the accuracy of the monitoring data of the oxidability of the lubricating oil, and meanwhile, the copper wires 241 are spirally disposed in the detection box 200, thereby effectively increasing the maximum contact surface of the lubricating oil, further accelerating the reaction thereof, and improving the detection efficiency.

In a preferred embodiment of the invention, optimization and improvement are carried out on the basis of a standard test method in SH/T0193, the comparison judgment of the acid value, the viscosity, the insoluble matter, the catalyst weight increase and loss, the copper wire 241 appearance and the oil appearance of the oil product before and after the test is combined, the formula data of the lubricating oil is continuously accumulated by combining a reference sample, and the work of preliminary screening, sample imitation comparison and the like in the new formula can be carried out, so that the product is continuously optimized. On the other hand, the improved equipment has better applicability, can be suitable for common small and medium-sized laboratories, can be put into different markets required by new product development, and meets the requirements of more experimental conditions.

In a preferred embodiment of the present invention, the lower portion of the driving shaft 140 is provided with a locking protrusion 141, the upper surface of the bearing wheel 230 is provided with a locking groove 231, and the locking buckle and the locking groove 231 are engaged with each other, so that the driving shaft 140 is tightly engaged with the bearing wheel 230, and the rotation of the stirring member 220 is realized. On the other hand, the bottom surface of the detection box 200 is provided with a plurality of guide protrusions 260, the upper surface of the assembly plate 130 is provided with a plurality of guide grooves 131, and the detection box 200 can be accurately placed on the assembly plate 130 through the mutual matching of the guide grooves 131 and the guide protrusions 260, so that the oil inlet pipe and the oil outlet pipe are respectively and accurately butted with the oil inlet 280 and the oil outlet 250.

It should be noted that the invention is based on the product early-stage research and the formula adjustment, and the basic data research is done by combining the actual bench test and the application, so that the oxidation trend of the oil product can be further judged, the judgment result guides the product formula research, the test result is analyzed and compared, and the performance data changes after oxidation, so as to realize the rapid performance comparison with the reference sample, thereby realizing the formula optimization of the lubricating oil and obtaining the lubricating oil product with better performance.

When the detection device is used, the copper wire 241 is placed on the fixed block 240, lubricating oil and a copper catalyst are added into the detection box, the detection box is pushed above the hydraulic column 211 until the buckle and the clamping groove are buckled with each other, the hydraulic column 211 extends to drive the detection box to ascend until the stirring rod 221 enters the detection box; at the moment, the oil outlet pipe is tightly connected with the oil inlet 280, the oil inlet pipe is tightly connected with the oil outlet 250, the high-temperature oil tank circularly fills hot oil into the detection box until the temperature reaches 150 ℃ and is kept unchanged, the stirrer is started to stir the lubricating oil in the detection box, the stirring speed is 70r/min, the stirring is stopped after 5 hours to finish the detection, and meanwhile, the air inside and outside the assembly box body 100 is exchanged by the ventilator; in step S2, the oxidability of the lubricating oil and various performance indexes of the lubricating oil are obtained by combining the comparison and judgment of the acid value, viscosity, insoluble matter, catalyst weight gain and loss, and copper wire 241 appearance with the oil appearance before and after the test, and the formula data of the lubricating oil is continuously accumulated by combining with the reference sample, so that the work of preliminary screening of a new formula, sample imitation comparison and the like can be performed, and the product is continuously optimized.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.