2848 results about "Oil film" patented technology

The invention provides a quantitive type experimental device for dynamic and static performances of a static-pressure rotary table, and belongs to the field of machinery design and manufacture. According to the experimental device, a loading device (5) and a loading arm (6) are used for changing magnitude of loads or changing oil supply pressure to control the distance between a static-pressure oil cushion (10) and a rotary table disc chuck (7), a pressure sensor (12) is used for measuring pressure in an oil cavity, an eddy current displacement sensor (11) is used for measuring the thickness of an oil film, a thermocouple temperature sensor (3) is used for measuring oil temperature, a force sensor (4) is used for obtaining magnitude of loading force, a pressure gauge a (15) on a multi-head pump at an oil inlet in the oil cavity is used for measuring pressure of the oil inlet of the oil cavity, and a pressure gauge b (16) arranged between an oil pump and the multi-head pump is used for measuring the oil supply pressure of the static-pressure rotary table. By means of the experimental device, a test of the dynamic and static performances of the static-pressure rotary table is carried out under the condition that temperature is between minus 10 DEG C and 60 DEG C and pressure is not more than 100 MPa, and the experimental device provides guarantee for solving problems in engineering, optimizing structural parameters of the rotary table, and improving machining precision of the rotary table.

The invention relates to an ocean spilt oil film thickness hyperspectral remote sensing estimation method based on a parameter lookup table and belongs to the field of ocean environment monitoring research. The method includes the steps of obtaining and pre-processing standard oil film thickness continuous change hyperspectral data by designing a simulation experiment; obtaining and pre-processing ocean spilt oil satellite remote sensing data; resampling a standard oil film spectrum based on a satellite sensor performance index; normalizing spectral reflectivity; building an oil film thickness optical calculating model; building an attenuation parameter lookup table; normalizing the reflectivity of satellite data and conducting mask treatment; inquiring and building an optimal wave band of the satellite data and relevant parameters; and calculating the oil film thickness in the satellite data through the parameter lookup table and the optical model. Compared with a traditional observation means, by means of the ocean spilt oil film thickness hyperspectral remote sensing estimation method, field workload is less, the thickness of the spilt oil film can be quantized, the thickness of an oil film in a spilt oil area can be calculated without entering an ocean spilt oil pollution area, and requirements of ocean split oil emergency monitoring and evaluation can be met.

A rolling bearing for a turbomachine supporting a first shaft to rotate relative to a second shaft, and comprising: a plurality of rolling elements engaged between an inner annular ring mounted on the second shaft and an outer annular ring mounted on the first shaft; an oil film formed at an annular contact surface between said outer ring and said first shaft; at least one duct passing through said inner ring and opening out in an inner race for said rolling elements in order to lubricate them; and at least one additional duct passing through said inner ring and opening out outside the inner race in order to feed oil through said outer ring to said oil film under the effect of the centrifugal force generated by said second shaft rotating, said outer ring having an annular shoulder projecting radially towards the inside of said annular space, said shoulder having at least one channel opening out substantially in register with said additional duct and opening out into said oil film.

The invention relates to a method for measuring thickness of sea surface spilled oil film based on differential laser triangulation. The method uses dual laser triangulation ranging system, and laser beams emitted by two lasers are respectively irradiated to the upper and the lower surfaces of an oil film to be measured in any vertical direction; the off-plane displacements of the upper and the lower surfaces can be obtained simultaneously according to the size of image drift and configuration parameters of imaging system; the thickness of the measured oil film can be determined by subtracting; and the thickness distribution of oil film in spilled oil area can be obtained by multi-point sampling. The non-contact measuring method has the characteristics of simple theory, convenient measurement, low cost, high precision, small volume and the like, and can be applied to dynamic on-line measurement of oil film thickness at the surface of aqueous solution.

The invention provides a portable airborne marine oil spill remote sensing monitoring system, and relates to the marine pollution monitoring field. The system comprises an infrared/ultraviolet/multispectral digital camera, a central control and display system as well as a data management and image processing operation software system. The central control and display system records image information acquired by the infrared/ultraviolet/multispectral digital camera, and superposes the information with an electronic chart for on-line or off-line track playback; and the data management and image processing operation software system which is arranged in a portable industrial control computer of the central control and display system reads the image information, identifies oil spill on line, computes contaminated area on line and identifies thick oil film. The system has the advantages that the portable airborne marine oil spill remote sensing monitoring system can be expediently equipped on various ocean patrol planes without power supply from the planes; when a marine oil spill accident happens, the system can track the marine oil spill in real time, estimate oil spillage and the contaminated area, and evaluate the oil spill elimination effect.

The invention discloses a real-time oil film whirling fault diagnosis method for a large steam turbine generator set, belongs to the fields of mechanical vibration state monitoring and fault diagnosis, and relates to the real-time online monitoring of the vibration state of the large steam turbine generator set. The method comprises the following steps: collecting vibration signals of a rotor shaft of a steam turbine set to carry out necessary data preprocessing on vibration data, judging that the rotating speed of a shaft system of the set is less than twice of a first critical rotating speed of a rotor, further combining the Fast Fourier Transform (FFT) spectrum analysis method to carry out the real-time quantitative computation and analysis of the shaft vibration data such as unicity verification of the main frequency for the low frequency vibration of the shaft vibration, condition verification of the main frequency for the half-frequency vibration of the shaft vibration, the condition verification of the half-frequency vibration amplitude of the shaft vibration and the like, and automatically diagnosing whether an oil film whirling fault occurs in the set based the real-time quantitative computation and analysis and in conjunction with various verification results in a real-time and online manner. The method has the advantages of scientificness, reliable conclusion, automatic realization of the real-time online monitoring and fault diagnosis and the like.

The invention discloses a low-pollution combustion chamber with a main combustion stage adopting single-layer pre-film radial two-grade reverse rotational flow. The low-pollution combustion chamber adopts a single annular cavity structure, and comprises a diffuser, a combustion outdoor box, a combustion indoor box, a flame cylinder outer wall, a flame cylinder inner wall and a combustion chamber head part; the combustion chamber adopts a classification combustion scheme; the combustion head part is divided into a pre-combustion stage and the main combustion stage; the pre-combustion stage adopts a mode of combining rotational flow-stable diffusion combustion with rotational flow premixing combustion; the combustion mode reduces the pollutant discharge under small working conditions when not influencing stable combustion; and the main combustion stage adopts a premixing pre-evaporation combustion mode to be in favor of uniform combustion. The combustion chamber adopts a center classification structure; the pre-combustion stage is simple in structure; the main combustion grade adopts a two-grade reverse cyclone distributed in the radial direction; and two parts of reverse rotational flows shear an oil film, so that the atomization effect is greatly improved, the atomization of fuel of the main combustion stage and the mixing with air are enhanced, the premixing pre-evaporation of the fuel is reinforced, and the pollution discharge of whole landing and taking-off circulation of an aero-engine combustion chamber is further reduced.

The invention discloses an automatic double-sided oiling machine which comprises an oiling roller mechanism, an oil film adjusting mechanism and an oil groove mechanism. The oiling roller mechanism comprises an oiling roller which is placed in an oil groove of the oil groove mechanism. The oil film adjusting mechanism is arranged on the oiling surface of the oiling roller. The oiling roller consists of a first oiling roller and a second oiling roller. The second oiling roller is placed in the oil groove, and the roller faces of the first and second oiling rollers are tangential in the vertical direction compress each other. The automatic double-sided oiling machine provided by the invention has the benefits that the oiling film is uniform in thickness and easy to adjust and control, the deficiency of high dependency on manual operation in the manual oiling manner in a stretching, stamping and forming process of metal sheets is thoroughly solved, and the problem that the mould is easy to abrade and short in service life due to nonuniform manually oiled film is solved. Meanwhile, oil is saved, the labor intensity is reduced, and the production cost is saved. The automatic double-sided oiling machine is in particular suitable for double-sided automatic oiling for stainless steel thin plates which are hard to stamp and stretch.

The invention discloses a double-pre-film pneumatic nebulization low pollution combustor head structure. Combustion is organized in a combustor head in a center classification mode. The combustor head structure is divided into a main combustion level and a pre-combustion level. The pre-combustion level is of a double-level swirl cup structure, combustion is organized in a partially premixing mode, and the requirements for combustion stability and pollutant discharge of small working conditions are met. The main combustion level is of an axial swirler double-pre-film structure, combustion is conducted in a combustor in a premixing mode, and combustion pollutants can be effectively reduced through premixing combustion. The double-pre-film type main combustion level structure comprises two stages of independent oil collecting rings, two stages of axial swirlers and two stages of pre-film plate structures. Each stage of independent oil collecting ring is provided with a plurality of beveled fuel injection holes. Each stage of fuel is injected out through the fuel injection holes and then strikes the pre-film plates to be expanded into oil films. The structure is beneficial for fuel classification of the whole combustor under different working conditions, ensures reasonable oil-gas distribution, and further reduces the pollutant discharge level in the whole cycle of landing and taking off of the combustor of an aero-engine.

The invention relates to a lean oil premixing and pre-evaporating combustion chamber head structure with a cyclone/pre-film plate integrated primary combustion stage. A central staged combustion mode is adopted for the head structure and divided into a pre-combustion stage and the primary combustion stage, the mode of combining diffusive combustion and cyclone premixing combustion is adopted for the pre-combustion stage, the mode of premixing and pre-evaporating combustion mode is adopted for the primary combustion stage, and combustion pollutants can be effectively reduced. A cyclone/pre-film plate integrated structure is adopted for the primary combustion stage, the structure is simple and reliable, first-stage fuel and second-stage fuel form oil films on the same pre-film plate and are atomized, evaporated and mixed under the action of two strands of cyclones, an even oil and gas mixture can be easily formed at an outlet of the primary combustion stage, and the combustion pollutants are reduced. The design of dual oil paths of the primary combustion stage is beneficial to oil and gas matching of the combustion chamber under different working conditions, and the pollutant discharge level of the whole landing and take-off circulation of the combustion chamber of an aero-engine is further lowered. By means of the micro shrinkage type design of a primary combustion stage channel and the design of a backfire prevention ring, the backfire problem can be effectively solved, and the safety of the head of the combustion chamber is ensured.

The invention discloses a miniature slipper bearing lubricant film measuring instrument which comprises a frame, a miniature sliding block, a transparent round disk, a miniature sliding block fixing and adjusting unit, a transparent round disk revolving unit, a loading single end and a micro-interference measuring unit, wherein, a group of adjusting devices are used for adjusting and fixing the obliquity of the miniature sliding block. The instrument achieves high efficiency and high accuracy in adjusting the obliquity, and height difference of the two sides of an inclined surface has an adjustment accuracy of 0.2 micron. The utilization of the instrument can lead to the obtaining of a determined obliquity between a miniature sliding block work plane and the transparent optical round disk in a static condition. The adjustment of the obliquity includes the adjustment of size and direction.

The invention is a method for forecasting and setting friction coefficient in the cold continuous rolling high speed rolling course, executing on computer system the following steps of: a. collecting main equipment parameters of a cold continuous roller specific frame; b. collecting main lubricating process parameters of the cold continuous roller specific frame; c. collecting n groups of actual rolling process parameters of the cold continuous roller specific frame; d. according to the field experimental data of a specific leveler, establishing a plate surface roughness forecasting model for the specific leveler; e. using a, b as friction coefficient mechanism model parameters and to-be-found variants, constructing a friction coefficient mechanism model reflecting basic function relation between friction coefficient and lubricating oil film thickness; f. substituting the friction coefficient mechanism model parameters into a function equation reflecting relation between friction coefficient and lubricating oil film thickness and obtaining a friction coefficient forecasting and setting model in the cold continuous rolling high speed rolling course; and g. on-line forecasting and setting the friction coefficient in the cold continuous rolling high speed rolling course.

The invention discloses an ultrahigh rotating speed oil bearing for powder metallurgy and a manufacturing method thereof. The bearing comprises the following components in percentage by weight: 27-54% of Cu, 3-6% of Sn, 2.2-6% of MoS, 0.2-2% of La or Ce and the balance of Fe and inevitable impurities. The bearing is manufactured by carrying out processes of mixing, low-temperature diffusion, press forming, sintering, reshaping and oil immersion treatment on mixture formed by proportionally mixing the powders. Solid lubricant and rare earth which are used as an active catalyst and an enhancer for a basis material of the bearing are added to the bearing, thereby being benefical to grain refinement; and weeny through holes are generated on a sintering body, and the connectivity rate is more than 95 percent. When the bearing rotates at a high speed, an oil film is formed on the inner wall of the bearing by the lubricating oil, and the bearing is applicable to an ultrahigh rotating speed motor with the rotating speed being more than 34000 rpm.

The invention discloses a dynamic measuring method of lubricating films of a sliding bearing, and an optical fiber sensor that is used for measurement. Two reflection-typed optical fiber sensors with coaxial double loops that form a right angle are respectively arranged at the two end faces of a bearing bush of the sliding bearing, two distances from A to A' and from B to B' are directly measured, the coordinates of the two points A' and B' that are obtained by measurement and calculation are substituted into a standard circle equation of a shaft neck so as to calculate the values of x and y of a cross section circle of the shaft neck, and consequently, the eccentric offset of the shaft neck, the smallest oil film thickness h<min>, the position angle of the smallest oil film thickness Theta<min> and the thickness of the oil films on any point along the circumferential direction of the sliding bearing h(Theta) are obtained in order; in order to implement subsequent failure diagnosis, the multi-dimensional features of the lubricating films of the sliding bearing are represented and extracted. The optical fiber sensor that is used in the dynamic measuring method comprises an optical fiber probe, an incident optical fiber and a receiving optical fiber beam, and is characterized in that two loops of receiving optical fiber beams including an inner loop and an outer loop are arranged closely and coaxially surrounding the incident optical fiber.

The invention discloses a static-dynamic mixed oil film bearing, which comprises a static-dynamic mixed oil film bearing 1, a main shaft 2, a return chute 6, and an oil inlet hole 10. The static-dynamic mixed oil film bearing is characterized in that the surface of an inner hole of the static-dynamic mixed oil film bearing 1 is provided with three static cavities which mutually form 120 degrees; pressure oil enters each static cavity through the oil inlet hole 10; the pressure oil returns through three coaxial return chutes 6; three step holes mutually forming 120 degrees are arranged between the static cavities and the coaxial return chutes 6; and three dynamic cavities are formed on the oil seal surface between the step cavities and the coaxial return chutes 6. The static-dynamic mixed oil film bearing better solves the contact problem between the main shaft and the static-dynamic mixed oil film bearing when the main shaft is started, and greatly improves the dynamic pressure effect of the static-dynamic mixed oil film bearing when in operation work condition and therefore obtains an ideal dynamic pressure effect, can greatly improve the rigidity of the oil membrane and the effect of homogenizing errors, and can greatly improve the return precision of a main shaft system.

The invention relates to a continuous lubrication crystallizer used for casting aluminum alloy semi-continuously, wherein the inner wall of the crystallizer is inlaid with a graphite lining, a top cover of the crystallizer is internally provided with an independent oil cavity, the graphite lining presents up-down symmetric construction with a taper, a body of the crystallizer is provided with a top water cavity and a lower cavity which are independent, the top water cavity and the lower cavity are respectively opened with an independent water inlet and are respectively provided with a splash plate, the bottom of the top water cavity is provided with a row of water passing ports, the bottom of the lower water cavity is also provided with a row of water passing ports, the angel of the water passing ports of the top water cavity is different from and presents interlaced shape with the water passing ports of the lower water cavity's, when casting, a layer of continuous oil film forms via infiltrating oil forming the oil cavity to the graphite lining, which has effects of heatproof, reducing once cooling of ingot casting at the same time when improving graphite lubricating oil effects, two independent water cavities realize the independent or double water-cavity water supply, which improves the aftercooling effect on the premise of ensuring heat cracks not to appear at the early stage of aluminum alloy ingot casting, thereby realizing a low liquid level on the inner portion of the crystallizer, and distinctively improving surface quality of the ingot casting.

The invention relates to a static-pressure turntable dynamic response computing method based on an overall dynamical model. The method comprises the steps: computing the average oil film thickness of all bearing oil pads and the average oil film thickness of pre-pressed oil pads, computing bearing capacities of the pre-pressed oil pads and the bearing oil pads, building the overall dynamical model of a static-pressure turntable, and using Matlab to compute the numerical solution of the turntable dynamical model, so as to determine the dynamic response of the turntable. Aiming at the problem that by adopting the existing modeling method of the static-pressure turntable, considered factors are not comprehensive, so that the turntable response computing accuracy is influenced, the invention provides a static-pressure turntable dynamic response modeling and computing method considering the surface roughness of the oil pads and unbalance loading influence, the accuracy of the model and the dynamic response computing accuracy are improved, and a guiding function for further optimizing the dynamic performance of the static-pressure turntable is realized.