CN107699312B - Large-scale component sliding lubricating oil and blending method and blending device thereof - Google Patents
Large-scale component sliding lubricating oil and blending method and blending device thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/22—Compounds containing sulfur, selenium or tellurium
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/063—Tunnels submerged into, or built in, open water
- E02D29/073—Tunnels or shuttering therefor assembled from sections individually sunk onto, or laid on, the water-bed, e.g. in a preformed trench
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
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- C10M2201/066—Molybdenum sulfide
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/055—Particles related characteristics
- C10N2020/06—Particles of special shape or size
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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Abstract
The invention relates to the technical field of immersed tube tunnels, in particular to large member sliding lubricating oil, a blending method and a blending device thereof, wherein the large member sliding lubricating oil comprises 67-77% of engine oil and 23-33% of molybdenum sulfide by weight percentage, so that the large member is safe in the whole sliding process, including power equipment, abrasion deformation, service life and the like, the components in the percentage are adopted, the friction coefficient of the ten thousand tons of large members can be controlled within the design requirement range, the large member can be smoothly transferred, the lubricating oil with the ratio achieves the best lubricating effect, the blending method adopts the mode of coating lubricating oil with different ratios on a sliding plate and a supporting panel and sequentially increasing the number of the sliding plates for measurement and calculation, thereby measuring the lubricating oil ratio of the maximum static friction force and the minimum friction coefficient, and achieving the purpose of simulating and pushing the large members with different weights, the prepared lubricant is suitable for the occasions of large-scale component slippage.
Description
Technical Field
The invention relates to the technical field of immersed tube tunnels, in particular to a large member sliding lubricating oil, a blending method and a blending device.
Background
The total length of a submarine immersed tube tunnel in the tunnel engineering of the hong Kong Zhu-Auao bridge island is 5664m, the submarine immersed tube tunnel is composed of 33 pipe joints, the length of a single standard pipe joint is 180m, the weight is about 7.2 ten thousand tons, each pipe joint is composed of 8 sections with the length of 22.5m, the weight of each section also reaches several thousand tons, and the pipe joints adopt the cross section form of a pipe gallery with two holes and one pipe gallery with the width of 37.95m and the height of 11.4 m.
The pipe section prefabrication adopts a section matching prefabrication method: completing construction of the No. 1 segment on a pouring pedestal, pushing and moving the pipe segment forwards by 22.5m (namely the length of a single segment) after the concrete of the No. 1 segment reaches the pushing and moving strength, and matching and pouring the No. 2 segment; after the 2# segment reaches the pushing moving strength, the 1# segment is pushed forwards and moved for 22.5m together with the pushing moving strength, and the 3# segment is cast in a matched mode; and by analogy, the pouring of the 8# segment is completed, and finally, the pipe joint consisting of the 8 segments is pushed forwards and moved by about 130m to the shallow dock area.
The movement of the pipe joint adopts a process of bottom multi-point support continuous pushing: the bottom of the pipe joint is provided with 4 pushing sliding beam tracks which are arranged below the two side walls and the two middle walls, multipoint supports are arranged on the tracks, and pushing jacks are used for providing jacking force of the pipe joint. A plurality of supporting jacks are arranged on the pushing sliding track, a base of each supporting jack needs to be provided with a plurality of PTFE sliding plates before the supporting jacks are placed, and in the pushing process, the jacks slide in contact with the track through the sliding plates.
Based on selecting the top to push the way and moving the tube coupling, when using the top pushes the system top to push the tube coupling, because the distance of lapse is long, top pushes the weight greatly, need strict control jack and track between the friction coefficient, if the friction coefficient is too high, will lead to pushing the difficulty, make the top push the system need overcome the biggest static friction too big, this will lead to top push the system pump package trouble frequently, and also make the PTFE slide plate to be more the wearing and tearing deformation, shorten life. Therefore, how to control and reduce the friction coefficient of the relative motion between the jack and the rail becomes the key point of the whole pushing process.
The large member referred to in the present invention means a member having a geometric size of more than 30m × 10 m.
Disclosure of Invention
The invention aims to: the invention provides a large member sliding lubricating oil, a preparation method and a preparation device thereof, aiming at the problems that power equipment for providing a power source is easy to break down and abrasion deformation is easy to occur on a sliding base surface due to overlarge friction coefficient of a large member in the sliding process of the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme:
the large-scale component sliding lubricating oil comprises the following components in percentage by weight: 70-77% of engine oil and 23-30% of molybdenum sulfide.
Because the large-scale member has the characteristics of large volume and heavy weight, molybdenum sulfide is used as a component of the large-scale member, the molybdenum sulfide is suitable for a high-pressure environment, the molybdenum disulfide is solid powder prepared by chemically purifying natural molybdenum concentrate powder and changing the molecular structure, and the molybdenum disulfide is added into engine oil, can form an alternate state without adhesion, greatly increases the lubricity of the engine oil, protects a sliding plate, and prolongs the service life of the sliding plate.
After the molybdenum sulfide is formed by supersonic airflow crushing, the granularity of the molybdenum sulfide can reach 325-2500 meshes, the hardness of micro particles is 1-1.5, the friction coefficient is 0.05-0.1, and the molybdenum sulfide can play a good antifriction role when being added into engine oil.
The sliding plate has the advantages that the sliding plate adopts the engine oil and the molybdenum sulfide, has a better antifriction effect compared with other lubricants, and simultaneously adopts the mixing ratio to achieve a better effect, greatly reduce the friction coefficient, meet the design requirement of the friction coefficient, avoid frequent faults of power equipment for providing power sources for the sliding of large components, effectively protect the sliding plate for supporting the sliding of the large components, avoid the abrasion deformation of the sliding plate and prolong the service life of the sliding plate.
Preferably, the lubricating oil comprises the following components in percentage by weight: 73-76% of engine oil and 24-27% of molybdenum sulfide.
The friction coefficient of a strict controller must be controlled in the sliding process of a large member, and when the friction coefficient is controlled within a design range, the whole sliding process is safe, including power equipment, abrasion deformation, service life and the like. The components in the percentage are adopted, the friction coefficient of a large member of ten thousand tons can be controlled within 6 percent, the large member can be smoothly transferred, and the lubricating effect of the lubricating oil with the proportion is optimal.
Preferably, the lubricating oil comprises the following components in percentage by weight: 75% of engine oil and 25% of molybdenum sulfide.
By adopting the proportion, the lowest friction coefficient of the lubricating oil can be ensured to the greatest extent, and the lubricating property and the lubricating effect of the lubricating oil reach peak values.
Correspondingly, the invention provides a blending method for preparing the large component sliding lubricating oil, which comprises the following steps:
a. determining the components of the sliding lubricating oil;
b. preparing sliding lubricating oil, and weighing each component of the lubricating oil according to different weight proportions to obtain the sliding lubricating oil with different proportions;
c. b, measuring and calculating friction force and friction coefficient, respectively measuring and calculating the maximum static friction force for pushing the sliding plates lubricated by the lubricating oil with different proportions obtained in the step b on the same test platform, and obtaining related friction coefficient, and when measuring and calculating the sliding plates lubricated by the lubricating oil with the same proportion, respectively measuring and calculating each condition of sequentially increasing the number of the sliding plates;
d. and comparing the friction coefficients of the lubricating oil in different proportions, and obtaining the weight percentage of each component by taking the proportion of the lubricating oil of which the friction coefficient meets the design requirement.
By adopting the mode, the maximum static friction force of the sliding plates lubricated by the lubricating oil with different proportions is respectively measured and calculated, the friction coefficient of the lubricating oil under each proportion is obtained, and during measurement and calculation, the mode of sequentially increasing the number of the sliding plates (one sliding plate, two sliding plates and three sliding plates …) is adopted for measurement and calculation, so that the purpose of simulating and pushing large members with different weights is achieved, the prepared lubricating agent is suitable for occasions where the large members slide, and by adopting the mode, the measured and calculated data are more accurate and have reference and comparison values.
Because the weight of the sliding plate is doubled when one sliding plate and two sliding plates are pushed, the maximum static friction force to be overcome also has great difference aiming at the lubricating oil with different proportions, and the total weight of the sliding plate is increased greatly when three sliding plates are pushed, the proportion of the lubricating oil suitable for the sliding working condition of a large member can be obtained by comparing the change of the maximum static friction force and the friction coefficient under the condition, not only the maximum static friction force of the sliding block with the same weight is compared, but also the method is completely different from the common blending method.
Preferably, the step a specifically includes the following steps:
a1, preparing various lubricating oils of different types;
a2, measuring and calculating friction force and friction coefficient, respectively coating a plurality of prepared lubricating oils on the same experiment platform, and measuring and calculating the maximum static friction force which is overcome to the same sliding plate under the same moving distance, thereby obtaining the friction coefficient of different lubricating oils;
a3, comparing the friction coefficients of different lubricating oils, and taking the lubricating oil with the minimum friction coefficient as the component of the large member dressing lubricating oil.
By adopting the mode, the friction coefficient under different lubricating oil is measured and calculated by adopting the same sliding plate, so that the type and the component of the lubricating oil with the minimum friction coefficient are obtained and used as the constituent components for further proportioning the proportion.
Preferably, the plurality of lubricating oils in step a1 includes hydraulic oil, graphite powder, engine oil, lithium grease, engine oil graphite powder mixture, engine oil lithium grease mixture, and engine oil molybdenum disulfide mixture.
Correspondingly, the invention also provides a blending device for blending the large component sliding lubricating oil, which comprises a sliding rail and a sliding plate for sliding on the sliding rail, wherein the sliding rail comprises a base and a supporting panel arranged on the base, the size of the sliding plate corresponds to that of the sliding plate for supporting the large component, and gaps for lubricating oil to infiltrate are arranged on the supporting panel and the sliding plate.
The size of the sliding plate is set to correspond to that of the sliding plate for supporting the large-scale component, so that the stress surface and stress condition of the sliding plate in the actual application process are simulated, the prepared lubricating oil is particularly suitable for the sliding plate, and the lubricating oil is ensured to meet the design requirement in the use process; meanwhile, gaps are formed in the supporting panel and the sliding plate, so that lubricating oil can be thoroughly immersed into the gaps, the purpose of sufficient lubrication is achieved, and the measurement and calculation are accurate and reasonable.
Preferably, the gap is opened on the binding face of support panel and slide.
Preferably, the material of the support panel is stainless steel.
Preferably, the sliding plate is made of PTFE.
The material of supporting panel and slide also simulates its in-service behavior, satisfies actual demand, makes the test condition and the service behavior of lubricating oil more be close to obtain the lubricating oil ratio under this operating mode.
Preferably, the supporting panel comprises a plurality of strip-shaped plates arranged side by side, and gaps for overflowing lubricating oil are reserved between the strip-shaped plates.
The gap is arranged for overflowing lubricating oil, so that the friction coefficient of the lubricating oil is measured more accurately.
Preferably, the size of the slide plate is 1000mm (length) × 210mm (width) × 16mm (thickness) or 1000mm (length) × 210mm (width) × 18mm (thickness).
The slide plate also simulates the actual use working condition, the actual requirement is met, the test working condition and the use working condition of the lubricating oil are relatively close, and therefore the lubricating oil proportion under the working condition is obtained.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. because the weight of the sliding plate is doubled when one sliding plate and two sliding plates are pushed, the maximum static friction force which needs to be overcome is greatly different for lubricating oil with different proportions, when three sliding plates are pushed, the total weight increase range of the sliding plate is large, the lubricating oil proportion suitable for the sliding working condition of a large-scale component can be obtained by comparing the change of the maximum static friction force and the friction coefficient under the condition, but the maximum static friction force of the sliding block under the same weight is not only compared, which is completely different from the common allocation method, the scheme measures and calculates the maximum static friction force of the sliding plate lubricated by lubricating oil with different proportions and obtains the friction coefficient of the lubricating oil under each proportion, and when the measure and calculate, the measure and calculate is carried out by adopting a mode of sequentially increasing the number of the sliding plates (one sliding plate, two sliding plates and three sliding plates …), thereby achieving the purpose of simulating and pushing the large-scale components with different weights, the prepared lubricant is suitable for occasions where large-scale components slide, and by adopting the mode, the measured and calculated data are more accurate and have reference contrast value;
2. the lubricating oil and the molybdenum sulfide have better antifriction effect than other lubricants, and meanwhile, the components in percentage by weight given in the scheme are adopted, so that the lubricating effect is better, the friction coefficient can be greatly reduced, the friction coefficient meeting the design requirement is met, frequent faults of power equipment providing a power source for the sliding of a large member are avoided, meanwhile, the sliding plate for supporting the sliding of the large member is effectively protected, the abrasion deformation of the sliding plate is avoided, and the service life of the sliding plate is prolonged;
3. the size of the sliding plate is set to correspond to the size of the sliding plate for supporting the large-scale component, so that the stress surface and stress condition of the sliding plate in the practical application process are simulated, the prepared lubricating oil is particularly suitable for the sliding plate, the lubricating oil is ensured to meet the design requirement in the use process, meanwhile, gaps are formed in the supporting panel and the sliding plate, the lubricating oil is thoroughly immersed into the gaps between the supporting panel and the sliding plate, the purpose of sufficient lubrication is achieved, and the measurement and calculation are more accurate and reasonable.
Drawings
FIG. 1 is a flow chart of the steps of the method for blending the sliding lubricant oil for large components according to the present invention.
FIG. 2 is a schematic structural diagram of a large component sliding lubricant blending device according to the present invention.
FIG. 3 is a line graph showing the friction coefficient of lubricating oils of different compounding ratios.
FIG. 4 is a line graph of the friction coefficient when the E23 pipe joint in example 2 is pushed to slip.
FIG. 5 is a line graph of the friction coefficient when the E23 pipe joint in example 2 is pushed and slipped.
FIG. 6 is a line graph of the friction coefficient when the E23 pipe joint in example 2 is pushed to slip.
The labels in the figure are: 1-sliding plate, 2-sliding rail, 21-supporting panel and 22-base.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
The large-scale component sliding lubricating oil comprises the following components in percentage by weight: 70-77% of engine oil and 23-30% of molybdenum sulfide.
Because the large-scale member has the characteristics of large volume and heavy weight, molybdenum sulfide is used as a component of the large-scale member, the molybdenum sulfide is suitable for a high-pressure environment, the molybdenum disulfide is solid powder prepared by chemically purifying natural molybdenum concentrate powder and changing the molecular structure, and the molybdenum disulfide is added into engine oil, can form an alternate state without adhesion, greatly increases the lubricity of the engine oil, protects a sliding plate, and prolongs the service life of the sliding plate.
After the molybdenum sulfide is formed by supersonic airflow crushing, the granularity of the molybdenum sulfide can reach 325-2500 meshes, the hardness of micro particles is 1-1.5, the friction coefficient is 0.05-0.1, and the molybdenum sulfide can play a good antifriction role when being added into engine oil.
The sliding plate has the advantages that the sliding plate adopts the engine oil and the molybdenum sulfide, has a better antifriction effect compared with other lubricants, and simultaneously adopts the mixing ratio to achieve a better effect, greatly reduce the friction coefficient, meet the design requirement of the friction coefficient, avoid frequent faults of power equipment for providing power sources for the sliding of large components, effectively protect the sliding plate for supporting the sliding of the large components, avoid the abrasion deformation of the sliding plate and prolong the service life of the sliding plate.
Further, the lubricating oil comprises the following components in percentage by weight: 73-76% of engine oil and 24-27% of molybdenum sulfide.
The friction coefficient of a strict controller must be controlled in the sliding process of a large member, and when the friction coefficient is controlled within a design range, the whole sliding process is safe, including power equipment, abrasion deformation, service life and the like. The components in the percentage are adopted, the friction coefficient of a large member of ten thousand tons can be controlled within 5 percent, the large member can be smoothly transferred, and the lubricating effect of the lubricating oil with the proportion is optimal.
Optimally, the lubricating oil comprises the following components in percentage by weight: 75% of engine oil and 25% of molybdenum sulfide.
By adopting the proportion, the lowest friction coefficient of the lubricating oil can be ensured to the greatest extent, and the lubricating property and the lubricating effect of the lubricating oil reach peak values.
Respectively weighing the engine oil and the molybdenum sulfide according to the proportion of 1.5:1, 2:1, 2.5:1, 3:1, 3.5:1, 4:1 and 4.5:1 by utilizing a tension meter, placing the engine oil and the molybdenum sulfide in a marked experimental vessel, cleaning a 2-meter long track as an experimental track, respectively coating the matched lubricating oil on the experimental slide plate, respectively testing the maximum static friction force which is overcome by pushing one slide plate, two slide plates and three slide plates, calculating the related friction coefficient according to a conventional technical calculation method, and drawing a friction coefficient statistical chart of the lubricating oil with different mix proportions according to the experimental result, wherein the statistical chart is shown in figure 3.
According to the relationship between the lubricating oil mix proportion and the friction coefficient shown in fig. 3, the friction coefficient meeting the requirement is taken to be 8.2%, the lubricating oil mix proportions of two end points are correspondingly obtained, namely the lubricating oil of 77% molybdenum sulfide 23% and the lubricating oil of 70% molybdenum sulfide 30%, then the lubricating oil is prepared according to the mix proportions, the method is further used for testing and calculating the accurate friction coefficient, the module coefficient of the lubricating oil of 77% molybdenum sulfide 23% is obtained to be 8.16%, the requirement is met, the module coefficient of the lubricating oil of 70% molybdenum sulfide 30% is obtained to be 8.18%, and the requirement of the friction coefficient of the lubricating oil of 8.2% is met.
Further taking the friction coefficient of 6%, correspondingly obtaining the lubricating oil mix proportions of two end points, namely 24% of the 76% molybdenum sulfide of the engine oil and 27% of the 73% molybdenum sulfide of the engine oil, then preparing the lubricating oil according to the mix proportions, further testing according to the method and calculating the accurate friction coefficient, obtaining the module coefficient of 5.83% of the 76% molybdenum sulfide of the engine oil under 24%, meeting the requirements, and the module coefficient of 5.77% of the 73% molybdenum sulfide of the engine oil under 27%, wherein the module coefficients are all within 6%.
When the engine oil is 75 percent and the molybdenum sulfide is 25 percent, the friction coefficient of the lubricating oil is 5.5 percent and reaches the lowest.
Example 2
In this embodiment, the corresponding engine oil and molybdenum sulfide mix ratio when the friction coefficient is lowest is adopted: 25% of molybdenum sulfide in 75% of engine oil, applying the lubricating oil with the mixing ratio to jacking of immersed tube joints of a Hongkong Zhuao bridge, testing jacking friction coefficients of three tube joints E23, E25 and E27, wherein the length of each tube joint is 180m, the weight of each tube joint is about 7.2 ten thousand tons, each tube joint consists of 8 segments with the length of 22.5m, including S1, S2, S3, S4, S5, S6, S7 and S8, the width of each segment is 37.95m, the height of each segment is 11.4m, the segment poured first is S8, jacking is carried out after the S8 pouring is finished, then S7 is poured at the end part of the S8 tube joint, jacking is carried out together with S8 after the S7 pouring is finished, and so on the like, jacking is carried out until the last tube joint S1 is finished, and jacking is carried out to all tube joints in place, namely jacking is carried out, and jacking is carried.
The pushing friction coefficient of three pipe joints E23, E25 and E27 is measured to obtain a graph shown in figures 4, 5 and 6, and as can be seen from the graph, the friction coefficient is the largest when large pushing is carried out, but only reaches 5.7 percent, and completely meets the design requirements, so that the safety of the whole sliding process is effectively ensured, the components comprise power equipment, abrasion deformation, service life and the like, 25 percent of molybdenum sulfide 75 percent of engine oil is adopted, the friction coefficient of ten thousand tons of pipe joints in the sliding process can be controlled within the required range, large-scale components can be smoothly transferred, and the lubricating effect of the lubricating oil with the proportion reaches the best.
Example 3
As shown in FIG. 1, the blending method of the large component sliding lubricating oil comprises the following steps:
a. determining the components of the sliding lubricating oil;
b. preparing sliding lubricating oil, and weighing each component of the lubricating oil according to different weight proportions to obtain the sliding lubricating oil with different proportions;
c. b, measuring and calculating friction force and friction coefficient, respectively measuring and calculating the maximum static friction force for pushing the sliding plates lubricated by the lubricating oil with different proportions obtained in the step b on the same test platform, and obtaining related friction coefficient, and when measuring and calculating the sliding plates lubricated by the lubricating oil with the same proportion, respectively measuring and calculating each condition of sequentially increasing the number of the sliding plates;
d. and comparing the friction coefficients of the lubricating oil in different proportions, and obtaining the weight percentage of each component by taking the proportion of the lubricating oil of which the friction coefficient meets the design requirement.
By adopting the mode, the maximum static friction force of the sliding plates lubricated by the lubricating oil with different proportions is respectively measured and calculated, the friction coefficient of the lubricating oil under each proportion is obtained, and during measurement and calculation, the mode of sequentially increasing the number of the sliding plates (one sliding plate, two sliding plates and three sliding plates …) is adopted for measurement and calculation, so that the purpose of simulating and pushing large members with different weights is achieved, the prepared lubricating agent is suitable for occasions where the large members slide, and by adopting the mode, the measured and calculated data are more accurate and have reference and comparison values.
Because the weight of the sliding plate is doubled when one sliding plate and two sliding plates are pushed, the maximum static friction force to be overcome also has great difference aiming at the lubricating oil with different proportions, and the total weight of the sliding plate is increased greatly when three sliding plates are pushed, the proportion of the lubricating oil suitable for the sliding working condition of a large member can be obtained by comparing the change of the maximum static friction force and the friction coefficient under the condition, not only the maximum static friction force of the sliding block with the same weight is compared, but also the method is completely different from the common blending method.
When determining the components of the sliding lubricating oil, the method mainly comprises the following operation steps:
a1, preparing various lubricating oils of different types;
a2, measuring and calculating friction force and friction coefficient, respectively coating a plurality of prepared lubricating oils on the same experiment platform, and measuring and calculating the maximum static friction force which is overcome to the same sliding plate under the same moving distance, thereby obtaining the friction coefficient of different lubricating oils;
a3, comparing the friction coefficients of different lubricating oils, and taking the lubricating oil with the minimum friction coefficient as the component of the large member dressing lubricating oil.
The various lubricating oils to be selected comprise hydraulic oil, graphite powder, engine oil, lithium grease butter, an engine oil graphite powder mixture, an engine oil lithium grease butter mixture and an engine oil molybdenum disulfide mixture.
Because the weight of the sliding plate is doubled when the sliding plate and the two sliding plates are respectively pushed, the maximum static friction force to be overcome also has larger difference aiming at the lubricating oil with different proportions, and the total weight increase range of the sliding plate is larger when the three sliding plates are pushed.
By adopting the above manner, the embodiment can obtain the lubricating oil proportion suitable for the sliding working condition of the large member by comparing the change of the maximum static friction force and the friction coefficient under the condition, rather than just comparing the maximum static friction force of the sliding block under the same weight, which is completely different from the common blending method, the embodiment measures and calculates the maximum static friction force of the sliding plate lubricated by the lubricating oil with different proportions respectively to obtain the friction coefficient of the lubricating oil under each proportion, during measurement, the number of the sliding plates (one sliding plate, two sliding plates and three sliding plates …) is increased in sequence for measurement, so that the aim of simulating and pushing large members with different weights is fulfilled, the prepared lubricant is suitable for the occasions where the large members slide, and by adopting the mode, the measured and calculated data are more accurate and have reference contrast value.
Example 4
As shown in FIG. 2, the device for dispensing sliding lubricant for large components comprises a sliding rail 2 and a sliding plate 1 for sliding on the sliding rail 2, wherein the sliding rail 2 comprises a base 22 and a support panel 21 mounted on the base, the size of the sliding plate 1 corresponds to the size of the sliding plate for supporting the large components, and gaps for lubricant to enter are arranged on the support panel 21 and the sliding plate 1.
The size of the sliding plate is set to correspond to that of the sliding plate for supporting the large-scale component, so that the stress surface and stress condition of the sliding plate in the actual application process are simulated, the prepared lubricating oil is particularly suitable for the sliding plate, and the lubricating oil is ensured to meet the design requirement in the use process; meanwhile, gaps are formed in the supporting panel and the sliding plate, so that lubricating oil can be thoroughly immersed into the gaps, the purpose of sufficient lubrication is achieved, and the measurement and calculation are accurate and reasonable.
In a preferred embodiment, the slit is formed in a contact surface between a support panel made of stainless steel and a slide plate made of PTFE.
The material of supporting panel and slide also simulates its in-service behavior, satisfies actual demand, makes the test condition and the service behavior of lubricating oil more be close to obtain the lubricating oil ratio under this operating mode.
In one preferred embodiment, the supporting panel includes a plurality of strip-shaped plates arranged side by side, and a gap for overflowing the lubricating oil is left between the strip-shaped plates.
The gap is arranged for overflowing lubricating oil, so that the friction coefficient of the lubricating oil is measured more accurately.
The size of the slide plate of the present embodiment is set to 1000mm (length) × 210mm (width) × 16mm (thickness) or 1000mm (length) × 210mm (width) × 18mm (thickness), which is equivalent to the size of the slide plate for pushing the large member.
The slide plate also simulates the actual use working condition, the actual requirement is met, the test working condition and the use working condition of the lubricating oil are relatively close, and therefore the lubricating oil proportion under the working condition is obtained.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A blending method of sliding lubricating oil for large-scale components is characterized by comprising the following steps:
a. determining the components of the sliding lubricating oil:
a1, preparing various lubricating oils of different types; the multiple lubricating oils comprise hydraulic oil, graphite powder, engine oil, lithium-based grease butter, engine oil graphite powder mixture, engine oil lithium-based grease butter mixture and engine oil molybdenum disulfide mixture;
a2, calculating friction force and friction coefficient: respectively smearing a plurality of prepared lubricating oils on the same experiment platform, and measuring and calculating the maximum static friction force which is overcome on the same sliding plate under the same moving distance, thereby obtaining the friction coefficient of different lubricating oils;
a3, comparing the friction coefficients of different lubricating oils, and screening the lubricating oil with the minimum friction coefficient as the constituent of the large member sliding lubricating oil; the lubricating oil with the minimum friction coefficient in the plurality of lubricating oils is an engine oil molybdenum disulfide mixture;
b. preparing a sliding lubricating oil: weighing each component of the lubricating oil according to different weight proportions to obtain the sliding lubricating oil with different proportions;
c. measuring and calculating friction force and friction resistance coefficient: on the same test platform, respectively measuring and calculating the maximum static friction force for pushing the sliding plates lubricated by the lubricating oil with different proportions obtained in the step b, and obtaining related friction coefficient, and when measuring and calculating the sliding plates lubricated by the lubricating oil with the same proportion, respectively measuring and calculating each condition of sequentially increasing the number of the sliding plates;
d. and comparing the friction resistance coefficients of the lubricating oil in different proportions, and finishing blending by taking the lubricating oil proportion with the friction resistance coefficient meeting the design requirement, wherein the engine oil molybdenum disulfide mixture comprises the following components in percentage by weight: 70-77% of engine oil and 23-30% of molybdenum disulfide.
2. The method for preparing sliding lubricant for large members according to claim 1, wherein the experimental platform comprises a slide rail and a slide plate for sliding on the slide rail, the slide rail comprises a base and a support panel mounted on the base, the size of the slide plate corresponds to the size of the slide plate for supporting the large member, and the support panel and the slide plate are provided with gaps for immersing lubricant.
3. The method of claim 2, wherein the gap is formed on the abutting surface of the support panel and the sliding plate.
4. The method for blending sliding lubricant for large members according to claim 3, wherein the support panel is made of stainless steel and the sliding plate is made of PTFE.
5. The blending method of sliding lubricant for large members according to claim 4, wherein the supporting panel comprises a plurality of strip-shaped plates arranged side by side, and gaps for overflowing lubricant are left between the strip-shaped plates.
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