350 results about "Cycle oil" patented technology

The utility model discloses a compressor and refrigeration equipment, and belongs to the technical field of compressors, the compressor comprises a motor assembly, a pump body assembly, a crankshaft and a silencer, the motor assembly drives the crankshaft to rotate through a stator and a rotor, compressed air is discharged to the silencer through an exhaust port of an air cylinder, and exhaust noise is reduced through a silencing cavity; the crankshaft can penetrate through the first through hole of the cover body and the air outlet of the silencer, and due to the fact that the air outlet and the first through hole are oppositely arranged in the axial direction of the crankshaft, air is exhausted into the cover body through the air outlet and the first through hole, passes through the inner cavity of the cover body and then penetrates through the rotor through the vent hole to be exhausted; due to the fact that gas flows along the silencing cavity, the inner cavity of the cover body and the vent hole in sequence after being exhausted from the air cylinder, disturbance of airflow to a circulating oil way can be effectively reduced, circulating flow of lubricating oil is smoother, stability of oil return and oil spitting is guaranteed, a good lubricating effect is provided for a pump body assembly, and running reliability of the compressor is improved.

The invention provides a conduction oil boiler system optimization control method and system based on an adaptive algorithm. The method comprises the steps of data acquisition, data preprocessing, model training, parameter optimization and real-time control. The system comprises a sensor network, a data processing module, a model training module, an optimization calculation module and a control execution module. Boiler operation data are collected in real time through a sensor network, a combustion boiler natural gas dynamic prediction model and a circulating pump efficiency optimization model are constructed after preprocessing, parameters such as the number of boilers, the circulating pump frequency and the oil supply temperature are optimized through an adaptive differential evolution (ADE) algorithm, and finally closed-loop adjustment is achieved through a control execution module. According to the method, the data-driven modeling technology and the self-adaptive optimization capability are utilized, so that system parameters can quickly respond to process demand changes, the heat efficiency is remarkably improved, the energy consumption is reduced, the temperature fluctuation is reduced, the operation and maintenance cost is optimized, and the operation performance and the economical efficiency of the heat conduction oil boiler system are comprehensively improved.

The utility model relates to an oil way system, a cascade unit, energy-saving equipment and refrigeration equipment, the oil way system comprises a first heat exchanger, a first oil tank and a second oil tank, a first channel and a second channel are arranged in the first heat exchanger, and heat exchange can be conducted between the first channel and the second channel; two ends of the first oil tank are respectively communicated with the first channel to form a first circulating oil path; the two ends of the second oil tank communicate with the second channel to form a second circulating oil way. According to the oil way system, when the oil temperature in the first oil tank and the oil temperature in the second oil tank have a large temperature difference, the oil temperature of one oil tank is too low, and the oil temperature of the other oil tank is too high or too high, heat exchange between the two circulating oil ways can be achieved through the first heat exchanger; and therefore, the conditions of too low oil temperature and too high oil temperature are relieved synchronously, and normal operation of an oil way can be guaranteed. No extra heating assembly or oil cooling assembly is needed, and the power consumption and the manufacturing cost of the oil way system can be obviously reduced.

The invention provides an aviation tail thrust clutch system lubrication and cooling performance test verification system which comprises a motor driving module, a lubrication and control module, a flow measurement module and a temperature measurement module and is used for testing an aviation wet clutch to be tested. According to the invention, regulation and control of different rotating speeds, different loads, different working states and flow input can be carried out, the flow of inlet and return lubricating oil and the temperature of return oil are measured so as to carry out a comparative test and the like, and comparative analysis with a simulation result is carried out so as to verify the correctness of a simulation method; the lubrication design is full-system lubrication based on axis oil supply and considering the internal and external spline pair, the multi-piece friction pair and the bearing, key parts can be ensured to be lubricated and are closer to actual requirements, meanwhile, a circulating oil path is designed, oil waste in the test process can be reduced, the cost is saved, and therefore the test efficiency is improved. Good test conditions are provided for the research on the lubricating and cooling performance of the aviation tail thrust clutch system.

The utility model relates to an oil circulation mechanism of a gearbox running-in workbench, which comprises a shell, a polluted oil tank, a transition oil tank and a clean oil tank are sequentially arranged in the shell from right to left, and one side of the polluted oil tank and one side of the transition oil tank are connected with a dirty oil filtering assembly; and the running-in stations are symmetrically arranged on the two sides of the shell, two sets of running-in stations are arranged on each side, and each set of running-in stations comprises an operation panel, a circulating oil port connected with the gearbox and a circulating filtering assembly used for filtering oil liquid. The utility model relates to the technical field of gearbox running-in workbenches. According to the oil circulating mechanism of the gearbox running-in workbench, through the arrangement of the dirty oil filtering assembly and the circulating filtering assembly, dirty oil in a gearbox can be filtered in the gearbox running-in period, the oil is synchronously filtered in the gearbox running-in working period, the shutdown oil changing time is saved, the service life of the oil is prolonged, and the working efficiency is improved. The abrasion of equipment parts is reduced, the non-planned downtime of the equipment is shortened, and the oil pollution treatment cost is reduced.

The invention discloses a method for obtaining a regenerated oil product by comprehensively utilizing high-chlorine high-metal waste mineral oil and tire pyrolytic oil, and belongs to the technical field of post-treatment of waste mineral oil and tire pyrolytic oil. The method comprises the following steps: (1) mixing high-chlorine high-metal waste mineral oil with circulating oil, and feeding the mixture into a reactor A; (2) mixing the effluent of the reactor A with tire pyrolytic oil, and feeding the mixture into a reactor B; (3) separating effluent of the reactor B to obtain naphtha, an oil component A and residues; (4) the oil component A enters a reactor C for hydrogenation upgrading; and (5) separating the effluent of the reactor C to obtain a second oil phase, and enabling the second oil phase to enter a steam stripping stabilizing tower and a normal-pressure rectifying tower to obtain naphtha, light fuel oil, medium fuel oil and heavy fuel oil. The method can solve the problem that chlorine and metal elements are difficult to efficiently remove at the same time in the recycling of high-chlorine high-metal waste mineral oil and tire pyrolytic oil at present, and improves the quality and yield of regenerated oil products.

The invention relates to the technical field of oil gas recovery, and discloses a variable-flow-direction cold-carrying circulation oil gas recovery system which comprises a variable-flow-direction oil gas cooling liquefaction recovery subsystem and a cold-carrying circulation heat recovery subsystem. The variable-flow-direction oil gas cooling, liquefying and recycling subsystem comprises a first-stage cooling module, a second-stage cooling module, a third-stage cooling module and a fourth-stage heating module which are sequentially communicated through oil gas connecting pipes; the secondary refrigerant circulation heat recovery subsystem comprises a first-stage oil gas condenser A, a first-stage oil gas condenser B, a first secondary refrigerant valve, a second secondary refrigerant valve, a secondary refrigerant pump, a fourth-stage oil gas heater, a third secondary refrigerant valve and a fourth secondary refrigerant valve. The flow-direction-variable cold-carrying circulation oil gas recovery system has the advantages of being low in energy consumption, energy-saving, environment-friendly, simple in refrigerating system, low in cost, high in reliability and the like, and the energy-saving and environment-friendly performance, the cost performance and the operation reliability of the oil gas recovery system are greatly improved.

The invention belongs to the technical field of gear box cooling, and relates to a wind turbine generator gear box cooling system and method, which comprises a gear box, a filter, an air cooling radiator, a plurality of gear box oil temperature detection sensors and a controller, the filter is arranged in a circulating oil path of the gear box; the gear box oil temperature detection sensors are respectively arranged at an outlet and an inlet of a circulating oil path of the gear box and in the gear box; the air cooling radiator is arranged on a circulating oil way of the gear box; and a lubricating pump and a straight-through valve are arranged on a circulating oil path of the gear box. The oil temperature of the gearbox is adjusted through the air cooling radiator, the oil temperature of the gearbox can be effectively monitored and adjusted, a specific cooling control strategy is implemented according to the oil temperature of the gearbox, the oil temperature adjusting efficiency is improved, the oil temperature fault rate of the gearbox is reduced, and normal operation of a wind turbine generator is guaranteed.

A drive module for a vehicle including an electric machine, an inverter, a gearing assembly, and a cooling system. A first housing member thermally coupled with the inverter has a first set of heat exchange surfaces and a second housing member thermally coupled with the electric machine has a second set of heat exchange surfaces. The first and second sets of heat exchange surfaces each project into an interior volume cooled by an externally supplied liquid coolant which thereby defines a heat exchanger. A lower oil sump for collecting oil used to cool the electric machine may also include heat exchange surfaces projecting into the same heat exchanger. The gearbox may include an elevated oil sump which is supplied by the same oil pump circulating oil on the electric machine wherein the elevated oil sump gravity feeds oil onto selected surfaces within the gearbox.

The invention provides a water-oil combined heat dissipation power module. On the basis of an existing water-cooling power module, a circulating oil way defined by a second cavity, a flow guide cover, a heat dissipation device, a circulating oil pump and related necessary connecting pipelines is additionally arranged. When the power module works, cooling water flows in from the near end of the power module and flows out from the far end of the power module below the radiator, in the process, the water temperature rises while the cooling water dissipates heat of the bridge arm chips, and the heat dissipation effect of the cooling water on the bridge arm chips is sequentially decreased from the near end to the far end. Meanwhile, the cooling oil circularly flows, flows through a cavity formed by the flow guide cover and the radiator after flowing out of the circulating oil pump and is directly cooled on the surface of the power chip, the oil temperature is increased while the cooling oil dissipates heat of the bridge arm chips, the heat dissipation effect of the cooling oil on the bridge arm chips is sequentially decreased from the far end to the near end, and the heat dissipation efficiency of the cooling oil on the bridge arm chips is greatly improved. And the heat dissipation effect is just opposite to that of the cooling water path. According to the technical scheme, the problem that an existing power module is not uniform in heat dissipation can be solved.

The utility model belongs to the technical field of hydraulic pipe cleaning, and particularly discloses a hydraulic pipeline oil string washing device which comprises an oil tank, an oil supply pipeline, an oil inlet pipeline, an oil return pipeline and a cooling loop. The oil supply pipeline comprises a lightering oil pump, an oil supply valve and an oil supply main pipe; the oil inlet pipeline comprises a circulating oil pump, a first oil inlet header pipe and a first oil inlet control valve are arranged between the oil tank and the circulating oil pump, and a second oil inlet header pipe, a one-way valve and a second oil inlet control valve are arranged between the circulating oil pump and the cleaned pipeline system; the oil return pipeline comprises a fine filter, a first oil return header pipe is arranged between the cleaned pipeline system and the fine filter, a second oil return header pipe is communicated between the fine filter and the oil tank, first oil outlet control valves are arranged on the first oil return header pipe and the second oil return header pipe, the fine filter is further communicated with an impurity removal control valve, and the impurity removal control valve is communicated with an impurity removal header pipe. According to the device, safe and reliable cleaning can be provided for pipeline systems with different pressure bearing and precision requirements, and the oil temperature can be controlled to achieve the optimal cleaning effect.

The invention relates to the technical field of petroleum processing, in particular to a method for simultaneously preparing a needle coke raw material and coated asphalt, a device for simultaneously preparing the needle coke raw material and the coated asphalt, needle coke and a lithium ion battery negative electrode material. The method comprises the following steps: (1) carrying out first distillation cutting on catalytic diesel oil to obtain a monocyclic aromatic hydrocarbon enriched component, a bicyclic aromatic hydrocarbon enriched component and a tricyclic aromatic hydrocarbon enriched component; (2) performing thermal polycondensation reaction on the bicyclic aromatic hydrocarbon enriched component to obtain pyrolysis gas and a thermal polycondensation product; (3) carrying out second distillation cutting on the thermal polycondensation product to obtain cracked light oil I, cracked light oil II, circulating oil and polycondensation heavy components; and (4) carrying out reduced pressure distillation cutting on the polycondensation heavy component to obtain polycondensation wax oil and polycondensation asphalt which are respectively used as a needle coke raw material and coated asphalt. According to the method, on one hand, the preparation process of the carbon material is enriched, and on the other hand, the resource utilization of the catalytic diesel oil is widened.

The invention discloses an axial magnetic flux motor based on half-cycle oil injection cooling and an oil injection cooling method thereof.The axial magnetic flux motor comprises motor shells, the two motor shells are symmetrically installed, the two stator assemblies are arranged in the two motor shells respectively, the rotor assembly is arranged between the two stator assemblies through an output shaft, and the rotor assembly is arranged between the two stator assemblies through an output shaft. The two stator assemblies are arranged on the two motor shells, the half-cycle oil injection cooling assemblies are arranged on the two motor shells and correspond to the upper half parts of the two stator assemblies, and the confluence oil outlet assemblies are arranged on the two motor shells and correspond to the bottoms of the two stator assemblies. The heat exchange efficiency is far higher than that of indirect cooling, and meanwhile, the two rows of half-cycle arc-shaped oil nozzles ensure that the cooling oil covers all winding coils, shunt cooling and auxiliary casing flow channel structures, the heat dissipation uniformity is improved, and the problem that the heat dissipation effect of the motor is poor is solved.

According to the transformer cooling system provided by the invention, transformer oil led out from the transformer main body sequentially flows into the circulating oil pump and the Venturi tube through the oil outlet pipe. The circulating oil pump can provide strong power for circulation of the transformer oil, and the Venturi tube enables the transformer oil to be in a turbulent flow state. And then, the transformer oil in the turbulent flow state enters the heat dissipation device, and efficient heat dissipation treatment is carried out. And the transformer oil subjected to heat dissipation stably flows back to the transformer main body through the oil return pipe, so that a complete heat dissipation cycle is formed. In the system, through cooperation of the circulating oil pump and the Venturi tube, the circulating flowing speed of transformer oil is remarkably increased, the transformer oil can pass through the heat dissipation device at a higher speed, a boundary layer between hot oil and the surface of a heat medium channel of the heat dissipation device is effectively damaged, and therefore the heat transfer efficiency is improved, and the heat dissipation efficiency is improved. Therefore, heat can be conducted to the surface of the heat dissipation device more quickly, and the heat dissipation efficiency of the whole heat dissipation system is further improved.

This invention discloses an oil-immersed transformer with an oil passage cleaning function, comprising a housing for mounting the core and windings, an oil conservator at the upper end of the housing, an oil pump on the side wall of the housing, a blockage-clearing filter assembly for unblocking and cleaning the oil passages on one side of the housing and the oil conservator, a conduit and a trigger assembly for circulating oil connecting the housing and the oil conservator, and a controller at the upper end of the housing. This invention has a simple structure and reasonable design. Firstly, by controlling the pipe diameter, larger winding insulation impurities cannot leave the oil conservator and housing during normal circulation. Then, by adjusting the transformer oil circulation path, the blocking winding insulation impurities are guided into the oil filter for filtration and removal. This avoids prolonged overload and damage to the oil pump or other circulation equipment, effectively extending the service life of the oil pump and circulation equipment and reducing maintenance costs.

The invention relates to the technical field of axle assemblies, in particular to an axle frame of a wheel-side electric drive axle, the wheel-side electric drive axle and a vehicle. The bridge frame of the wheel-side electric drive bridge comprises a main shell, the two ends of the main shell are each provided with an installation base used for installing a wheel-side mechanism, an oil storage cavity is formed in an inner cavity of the main shell, the main shell is provided with an oil way connecting structure, and the oil way connecting structure is used for being connected with a circulating oil way used for supplying oil to the wheel-side mechanism in a circulating mode. The oil storage cavity is provided with a space used for being communicated with the oil outlet end and the oil return end of the circulating oil way. The oil bottom box is formed by utilizing the shell structure of the bridge, the oil storage cavity is formed by utilizing the size of the bridge while the normal bearing function of the bridge is ensured, the structure is compact, the space is saved, the influence on the ground clearance caused by arranging the oil bottom box at the bottom of the motor of the wheel side mechanism can be avoided, and the low floor of a vehicle can be realized.

The invention relates to the technical field of extra-high voltage power transformation project main equipment installation, and provides an EMD-combined LSTM main equipment installation hot oil circulation oil temperature prediction method, which comprises the steps of collecting time sequence data of instantaneous flow, water content, gas content, granularity, oil filter outlet oil temperature and transformer outlet oil temperature for oil temperature prediction in a main equipment installation hot oil circulation link; using an EMD decomposition method to decompose the transformer outlet oil temperature characteristic time sequence data into a plurality of IMF components and an RES component; calculating a Pearson's correlation coefficient, and screening and filtering components of which the correlation is lower than a preset threshold value; and inputting data obtained by combining the screened component after EMD decomposition of the transformer outlet oil temperature within a certain time range with the instantaneous flow rate, the water content, the gas content, the granularity and the oil filter outlet oil temperature into an LSTM model for multivariable oil temperature prediction. The method can effectively improve the prediction precision of the standard reaching time of the outlet oil temperature of the transformer.

The utility model provides a self-circulation oil immersed transformer which comprises an oil tank body, a ventilation pipeline, a condensation sleeve, heat dissipation fins, heat dissipation holes, an axial flow fan and installation screws, a transformer body is installed on the lower end face of the interior of the oil tank body, and a high-low voltage sleeve is arranged on the upper end face of the oil tank body and electrically connected with the transformer body. A cooling water tank is fixed to the right end face of the oil tank body, a refrigerator is fixed to the right end face of the cooling water tank, the annular face of the oil conveying pipeline is sleeved with a condensation sleeve, a ventilation pipeline is fixed to the upper end face of the cooling water tank, and the annular face of the oil conveying pipeline is sleeved with cooling fins. The protective net covers are fixed to the upper end face, the left end face and the right end face of the ventilation pipeline through installation screws, heat dissipation holes are formed in the inner wall of the ventilation pipeline, the axial fans are installed in the protective net covers, water cooling and air cooling are used in cooperation for heat dissipation of oil, the cooling efficiency is high, and practicability is good.

The invention discloses a sealed type safe anti-explosion mining transformer, and belongs to the technical field of transformers. Comprising a machine shell, fins are distributed on the outer wall of the machine shell, a collecting box is fixed to the machine shell, a circulating oil pump is fixedly installed in the collecting box, an oil storage tank is arranged in the collecting box, an oil outlet tank is fixed in the collecting box and connected with the oil outlet end of the circulating oil pump, a filter cartridge is fixedly installed in the oil outlet tank, and the oil storage tank is connected with an oil outlet pipe. The oil outlet pipe is connected with a backflow pipe extending into the oil outlet tank, the backflow pipe is rotationally connected with a back-flushing block located on the inner side of the filter cartridge, the back-flushing block is provided with a back-flushing groove facing the inner wall of the filter cartridge, and one-way valves are arranged in the oil outlet pipe and the backflow pipe. The sealed type safe anti-explosion mining transformer has the beneficial effects that through the arrangement of the oil storage tank, when oil in the machine shell expands at high temperature, and the pressure in the machine shell is increased, the oil is pumped out of the machine shell and then enters the oil storage tank, and the pressure in the machine shell is reduced.

The invention discloses cold-drawing equipment of a precise seamless steel pipe for a hydraulic front fork rod, and relates to the technical field of cold-drawing equipment.The cold-drawing equipment comprises a workbench, a cold-drawing die, an oil coating mechanism, an oil removing mechanism and a drawing mechanism. Lubricating oil is evenly smeared on the surface of the seamless steel pipe through an oil supply ring and a ball of the oil coating mechanism, cold-drawing operation is carried out, and the precision of the seamless steel pipe is improved; meanwhile, a residue filtering pipe is automatically rotated to the position between an oil discharging pipe and a circulating oil pipe through an extrusion plate of the oil removing mechanism, so that a pipeline is communicated, a seamless steel pipe is heated through a conical rubber sleeve and an air heater, lubricating oil on the seamless steel pipe slides into an oil collecting shell, and impurities are filtered through a filter screen in the residue filtering pipe; and when the extrusion plate is separated from the seamless steel pipe, the residue filtering pipe rotates into the residue collecting box, and the residue filtering pipe collides with the residue collecting box for multiple times under the action of the spring, so that the filter screen is prevented from being blocked.

The invention discloses a process for producing carbon black raw oil by using catalytic slurry oil and catalytic cycle oil. The preparation method comprises the following steps: adding catalytic cycle oil into catalytic slurry oil, fully mixing to form blend slurry oil, and then carrying out sedimentation and solid removal treatment on the blend slurry oil to obtain carbon black raw oil; wherein the mass ratio of the catalytic slurry oil to the catalytic circulating oil is (80-95): (5-20); the settling solid removal treatment mode is that an oil slurry deliming agent is used for deliming treatment, and the adding proportion of the oil slurry deliming agent is 0.02%-0.1% of the mass of the catalytic oil slurry. According to the invention, the purpose of producing the carbon black raw oil by using the catalytic slurry oil is realized, the product quality meets the index requirements of GB / T41957-2022 Carbon Black Raw Oil Petroleum Refining Catalytic Slurry Oil, and the production process is simple and feasible.

The utility model relates to the technical field of papermaking, in particular to a high-speed direct-drive papermaking vacuum pump which comprises a truss, a direct-drive motor, a lubricating system, a vacuum pump head and a frequency conversion controller, the direct-drive motor, the lubricating system, the vacuum pump head and the frequency conversion controller are fixedly arranged on the truss, a spindle is arranged in the direct-drive motor and is in transmission connection with the vacuum pump head, and the lubricating system comprises a lubricating oil tank, a circulating oil pump and a circulating oil pipe. The lubricating oil tank is fixedly arranged on the truss, the circulating oil pump is fixedly arranged on the lubricating oil tank, one end of the circulating oil pipe is inserted into the lubricating oil tank, and the other end is sequentially connected with the circulating oil pump and a direct-drive motor pipeline. The direct-drive motor serving as a driving mechanism is directly connected with the vacuum pump head, traditional belt type driving is replaced, a step-up gear box mechanism, a coupler transmission piece and the like are omitted, the transmission efficiency is improved, meanwhile, the fault probability of equipment such as belt breakage is reduced, and the service life of the equipment is prolonged. The device is high in efficiency, remarkable in energy conservation, lower in construction and operation cost, safe and reliable to use, convenient to install and maintain, small in occupied area and short in return on investment.

The invention relates to a method for controlling an integrated auxiliary fuel tank for a vehicle. During low-temperature wax precipitation, before engine ignition, fuel oil in an oil supply pipeline is pumped through by oil supply pressure of an oil pump, and multiple times of circulating impact oil supply is adopted in the oil supply initial stage of the oil pump. And after the fuel oil pipeline is opened, the ignition waiting time of the engine is determined according to the environment temperature and the fuel oil temperature. The ignition waiting time is judged according to multiple temperature intervals, and the heaters start heating in advance according to time set values. And after successful starting, the oil pump continuously supplies oil according to the set oil supply time. And when the starting operation time of the engine reaches a set value, the oil pump controls oil suction according to the multiple circulating oil suction processes until the multiple circulating oil suction processes are executed or the liquid level reaches the set value. And when the fuel temperature in the auxiliary fuel tank is higher than the set value, the fuel pump actively sucks fuel from the main fuel tank to the auxiliary fuel tank to reduce the fuel temperature in the auxiliary fuel tank. After the whole vehicle is powered off, when the liquid level of the auxiliary oil tank is lower than a set value, the oil pump actively sucks oil to the set value or the oil pump actively sucks oil for set time.

The present invention discloses a cooling device for a gearbox, comprising an oil circulation mechanism, the oil circulation mechanism including a circulating oil pipe and a hydraulic oil pump, the circulating oil pipe including an oil outlet pipe connected to the bottom of the case and an oil return pipe connected to the top of the case, the oil return pipe being connected to the oil inlet of the hydraulic oil pump, and the oil return pipe being connected to the oil outlet of the hydraulic oil pump, a refrigerator being provided on one side of the case, the refrigerator including a condenser pipe wound around the oil return pipe, the oil outlet pipe being provided with a control mechanism, the control mechanism including a fastening clamp sleeved around the oil outlet pipe, the fastening clamp including an annular portion with an open end and ear plates fixed to both ends of the annular portion, a high thermal expansion element being provided on the inner side of the annular portion, the high thermal expansion element increasing in volume upon heating, the high thermal expansion element being coated on the outer circumference of the oil outlet pipe, a detection assembly being provided on the ear plates, the detection assembly being used to control the start and stop of the refrigerator. The present invention has the effect of reducing energy loss in cooling the gearbox.

The present invention discloses a hydrocracking method for producing heavy naphtha. The method comprises a hydropretreatment reaction zone and a hydrocracking reaction zone, and the process comprises: a wax oil-containing raw material and hydrogen pass through the hydropretreatment reaction zone for hydropretreatment, the nitrogen content of the effluent of the hydropretreatment reaction zone is controlled to be below 30 mg / kg, the effluent of the hydropretreatment reaction zone is mixed with the circulating oil and then enters the hydrocracking reaction zone for reaction, and the effluent of the hydrocracking reaction zone is separated and fractionated to obtain dry gas, liquefied gas, light naphtha, heavy naphtha and tail oil, wherein the tail oil, at least part of the liquefied gas and at least part of the light naphtha are circulated back to the hydrocracking reaction zone as the circulating oil. The method of the present invention is suitable for processing conventional hydrocracking raw materials, and can realize the maximum production of heavy naphtha by single-stage full-cycle processing of hydrocarbon raw materials.

The invention discloses an automobile active suspension high-pressure oil pump testing device and a using method thereof. The device comprises a pre-pressing tank, a testing unit and a circulating oil way. The pre-pressing tank is used for storing oil and providing stable pre-pressure; the testing unit is used for mounting and driving a high-pressure oil pump with first and second pump ports; the circulating oil path is connected between the pre-pressing tank and two pump ports of the high-pressure oil pump to form a closed circulating loop, and comprises a loading module and a one-way valve assembly; the one-way valve assembly can automatically guide the flowing direction of oil according to the rotating direction of the high-pressure oil pump, so that any pump opening serves as an oil inlet when rotating forwards and serves as an oil outlet when rotating backwards. According to the design, self-adaptive switching of an oil way is achieved in a pure hydraulic mode, forward and reverse rotation performance testing of the oil pump can be completed without disassembling a pipeline, the problems of pre-pressure fluctuation, oil pollution and low efficiency caused by system opening in a traditional method are effectively solved, and the testing reliability and efficiency are remarkably improved.

The application relates to the technical field of oil liquid filtration, and particularly relates to an oil filtering device and a circulating oil washing system for surface lubrication of a rotor of a cooling fan of an automobile, an oil storage device, an oil washing tank connected with the oil storage device, a switching assembly connected with a circulating pump arranged on the oil washing tank, two groups of liquid outlets formed on the switching assembly, two groups of filtering pipes arranged on the oil washing tank and communicated with the two groups of liquid outlets, the switching assembly capable of circulating and pumping waste oil into the two groups of filtering pipes, an oil washing waste discharge pipeline connected with the filtering pipes, cleaning oil capable of entering the filtering pipes through the oil washing waste discharge pipeline, a screen pipe coaxially and rotatably connected with the filtering pipe, and a top of the screen pipe being provided with a follow-up disc, the follow-up disc capable of driving the filtering pipe to rotate when the oil washing waste discharge pipeline in the filtering pipe is conducted, so that non-stop cleaning is realized, and the cleaning speed is improved.

The present invention provides a lubrication and cooling performance test verification system for an aviation tail thrust clutch system, including a motor drive module, a lubrication and control module, a flow measurement module and a temperature measurement module, which are used to test an aviation wet clutch to be tested. The present invention can regulate different speeds, different loads, different working states and flow inputs, measure the flow of incoming and returning lubricating oil, measure the return oil temperature, so as to conduct comparative tests, etc., and also conduct comparative analysis with simulation results to verify the correctness of the simulation method; the lubrication design is based on axial oil supply, considering the lubrication of the entire system including internal and external spline pairs, multi-plate friction pairs, and bearings, which can ensure that key components are lubricated, which is closer to actual needs, and is designed as a circulating oil circuit, which can reduce oil waste during the test process and save costs. Therefore, it provides better test conditions for the study of lubrication and cooling performance of aviation tail thrust clutch systems.

The invention provides an excavator potential energy recovery hydraulic warm-up filtering system, which belongs to the technical field of excavators, and comprises a selector valve, an oil inlet of the selector valve is respectively connected with a small cavity of a bucket rod oil cylinder and a large cavity of a movable arm oil cylinder through oil pipes, and two oil outlets of the selector valve are respectively connected with an energy accumulator and a recovery oil way through oil pipes; the recycling oil way comprises an oil return motor, the oil return motor is a double-shaft hydraulic motor, an output shaft at one end of the double-shaft hydraulic motor is connected with a circulating pump, an output shaft at the other end of the double-shaft hydraulic motor is connected with a generator, an oil inlet and an oil outlet of the circulating pump are connected with a hydraulic oil tank through circulating oil pipes, and a temperature sensor is arranged on the hydraulic oil tank. And a heater is arranged in the hydraulic oil tank. Potential energy generated when the working device descends can be recycled and converted into electric energy or used for heating and filtering hydraulic oil, and effective utilization of consumed energy is achieved.

Fuel oil compositions, and methods for blending such fuel oil compositions, to enhance initial compatibility and longer term stability when such fuel oil compositions are blended to meet IMO 2020 low sulfur fuel oil requirements (ISO 8217). In one or more embodiments, asphaltenic resid base stocks are blended with high aromatic slurry oil to facilitate initial compatibility such that low sulfur cutter stocks, e.g., vacuum gas oil and / or cycle oil, may be further blended therein to cut sulfur content while maintaining longer term stability. These fuel oil compositions are economically advantageous when used as marine low sulfur fuel oils because greater concentrations of high viscosity resids are present in the final blend.