2745 results about "Oil intake" patented technology

A constant-flow control valve group, an auxiliary arm control module, a complete hydraulic system, and a crane. The constant-flow control valve group comprises: a cartridge valve; a cartridge reversing valve, comprising a working oil port on one side and a main oil return port and a reversing valve oil inlet selectively connected to the working oil port on the other side, the working oil port being connected to a control oil port of the cartridge valve, and the reversing valve oil inlet being connected to a main oil inlet of the cartridge valve; and a feedback on-off valve, disposed in a working feedback oil path connected between the main oil inlet of the cartridge valve and a main feedback oil port of the constant-flow control valve group. The auxiliary arm control module comprises the constant-flow control valve group and a main reversing valve. The complete hydraulic system comprises the auxiliary arm control module and an auxiliary arm luffing cylinder, and may further comprise a load-sensitive oil pump and a main valve. The present application can achieve the effect of directly connecting an auxiliary arm hydraulic system to an existing complete hydraulic system as a sub-module without altering the original system.

The invention relates to the technical field of motor cooling, in particular to an oil-water composite cooling motor heat dissipation structure and a heat dissipation method thereof.The oil-water composite cooling motor heat dissipation structure comprises a machine shell, a stator iron core, a winding and a rotor are arranged in the machine shell, and a hollow shaft is inserted into the rotor in a penetrating mode. Water flows through the S-shaped water channel on the casing, the casing and the stator core are cooled when the water passes, most heat is taken away, and basic temperature control is maintained; cooling oil is guided into the first oil cooling channel, the second oil cooling channel and the third oil cooling channel through the oil inlets, it is guaranteed that all positions of the stator can make synchronous contact with heat dissipation oil in the first oil cooling channel, particularly, effective heat dissipation is conducted on a stator iron core, the oil enters an oil injection ring, and the cooling effect is improved. According to the utility model, oil is sprayed to a stator winding at 360 degrees circumferentially, heat dissipation is enhanced, the other two oil cooling channels guide oil to a bearing and a rotor respectively, a plurality of heating parts can be considered, a specific oil way is designed to directly cool the heating parts, the lubricating and heat dissipation efficiency is improved, and high-speed operation of the motor is realized.

A winch hydraulic control system includes a hydraulic oil tank, a hydraulic pump, and an electric motor. The hydraulic pump's oil inlet is connected to the hydraulic oil tank, the electric motor is connected to the hydraulic pump, and the hydraulic pump's oil outlet is connected to both port P of the main reversing valve assembly and port P of the control valve assembly. Ports A and B of the main reversing valve assembly are connected to port A of the first shuttle valve, port A of the balancing valve assembly, and port B of the control valve assembly, respectively. Port X is connected to port B of the second solenoid reversing valve. Ports B and C of the first shuttle valve are connected to port B of the balancing valve assembly and port B of the second shuttle valve, respectively. A third pressure reducing valve is connected in parallel with the second solenoid valve. Port P of the second solenoid reversing valve is connected to port X of the control valve assembly, port A of the second shuttle valve, and port SP of the balancing valve assembly. Port C of the second shuttle valve is connected to the rod chamber of the brake. The brake is connected to the hydraulic motor, and the oil outlet of the control valve assembly is connected to the oil inlet of the balancing valve assembly. This design can maintain constant wire rope tension and stable operation.

The invention discloses a system and method for testing flow, displacement and hydraulic power of a main valve element. The system comprises two displacement sensors, a tested balance valve and a hydraulic testing assembly. A main valve core and a pilot valve core of the tested balance valve are coaxially and oppositely arranged; the two displacement sensors are coaxially fixed with the main valve core and the control piston respectively; the hydraulic test assembly detects the pressure of an oil return port A, a load oil port B, a feedback spring cavity pressure measuring port Pc and a pilot oil inlet X through pressure sensors; the load pressure, the pilot pressure and the oil return back pressure are controlled through a main load oil way, a pilot control oil way and an oil return back pressure oil way respectively, and meanwhile the flow of the oil return is measured through a flow meter. According to the invention, the flow, displacement and hydraulic force of the main valve core under different working conditions can be synchronously and dynamically measured.

The utility model relates to the field of hydraulic braking, and discloses a parking braking system and agricultural machinery, the parking braking system comprises a parking brake, a first reversing valve, a second reversing valve and an energy accumulator, a working oil port of the first reversing valve is connected with a rod cavity of a brake cylinder of the parking brake, an oil inlet of the first reversing valve is connected with an oil inlet path, and an oil outlet of the second reversing valve is connected with an oil outlet path; an oil return port of the first reversing valve is connected with an oil return path, in a power-off state, a working oil port of the first reversing valve is communicated with the oil return port, an oil outlet of the second reversing valve is connected with the oil return path, in the power-off state, an oil inlet of the second reversing valve is communicated with the oil outlet, and the energy accumulator is connected with the oil inlet of the second reversing valve. According to the parking braking system, the situation that tires are locked when the agricultural machine loses power accidentally in the running process can be avoided, and meanwhile the agricultural machine can be slowly and stably decelerated till the agricultural machine is stopped and parked.

The invention discloses an in-situ detection device and system for dissolved gas in insulating oil. The device comprises an oil chamber, a pipe body and an oil-gas separation structure. An oil inlet is formed in the wall face of the oil chamber, and two oppositely-arranged lenses are further arranged on the wall face of the oil chamber. The pipe body is arranged in the oil chamber, two ends of the pipe body are respectively hermetically connected to the two lenses, and holes are formed in the side part of the pipe body. And the oil-gas separation structure is used for separating dissolved gas from the insulating oil and enabling the dissolved gas to enter the pipe body from the holes. After the oil inlet of the oil chamber is communicated with the oil sampling valve of the to-be-detected oil-immersed power equipment, insulating oil enters the oil chamber, and dissolved gas in the insulating oil is separated by the oil-gas separation structure and enters the pipe body from the hole, so that the dissolved gas interacts with laser emitted into the pipe body from a lens, and the laser is emitted into the pipe body from the lens. A Raman scattering signal capable of reflecting the concentration of each component of the gas is generated and is transmitted to the other lens through the tube body to be ejected out for detection, so that the in-situ high-sensitivity detection of the dissolved gas in the insulating oil is realized.

The utility model discloses a lubricating system of a gas turbine generator set and the gas turbine generator set, and relates to the field of power generation equipment. According to the lubricating system of the gas turbine generator set, the gas turbine generator set comprises a gas turbine, a generator and a gear box; the lubricating system comprises an oil tank, a main oil pump, an emergency oil pump, a first lubricating oil way and a second lubricating oil way, the oil inlet ends of the first lubricating oil way and the second lubricating oil way communicate with an oil outlet of the oil tank, the oil outlet end of the first lubricating oil way communicates with an oil inlet of the oil tank, and the oil outlet end of the second lubricating oil way is connected to the first lubricating oil way. The main oil pump is arranged on the first lubricating oil way. The emergency oil pump is arranged on the second lubricating oil way. The first lubricating oil way is used for being connected with the gas turbine, the generator and the gearbox, and the joint of the second lubricating oil way and the first lubricating oil way is located in the upstream area of the gas turbine, the generator and the gearbox. The problem that normal operation of a lubricating system is affected by oil pump faults can be solved.

The invention discloses a hydro-generator outer circulation bearing lubricating oil heating system, and belongs to the technical field of hydro-generator set bearing lubrication. The problems that in the prior art, rapid temperature rising cannot be achieved, heating is uneven, and dry burning is caused are solved. According to the technical key points, the constant-temperature heating module, the PID controller and the interlocking system are all arranged in the outer circulation unit, and the porous ring pipe structure is arranged in a bearing oil groove; an oil inlet of the oil inlet pipeline extends into the bottom of the bearing oil groove and is connected with a cold oil input ring pipe; an oil outlet of the oil outlet pipeline extends into the bottom of the bearing oil groove and is connected with a hot oil output ring pipe; and the arrangement height of the constant-temperature heating module is lower than the lowest oil level surface of the bearing oil groove. Space in the oil groove is not occupied, maintenance is convenient, the heater achieves oil return sealing of lubricating oil gravity, and oil cut-off and dry burning of the heater are avoided; cold oil in the bearing oil groove is evenly sucked in, hot oil is evenly sprayed out, lubricating oil in the bearing oil groove is evenly heated, and the temperature stratification phenomenon is avoided.

The invention discloses a stator structure of a motor and the motor, and relates to the technical field of motors, the stator structure of the motor comprises a stator iron core, the stator iron core is annular, a plurality of cooling oil channels are formed in the stator iron core, the plurality of cooling oil channels are sequentially arranged at intervals along the circumferential direction of the stator iron core, the cooling oil channels comprise yoke part oil channels and tooth part oil channels, and the yoke part oil channels are communicated with the tooth part oil channels. The yoke part oil ducts and the tooth part oil ducts extend in the axial direction of the stator iron core, the yoke part oil ducts and the tooth part oil ducts are arranged in the radial direction of the stator iron core, the yoke part oil ducts and the tooth part oil ducts are communicated, and the oil inlet and the oil outlet of the same cooling oil duct are located at the same end of the stator iron core in the axial direction of the stator iron core. According to the stator structure, the cooling oil can directly cool the yoke part and the tooth part of the stator core, the heat dissipation capability of the stator core can be improved, the stator core can be cooled uniformly, the heat dissipation efficiency of the stator core can be improved, the cooling effect of the stator core can be improved, and the working efficiency of a motor can be improved.

According to the filtering device for oil agent production, a tank body is provided with an oil inlet, hydraulic cylinders are arranged on the two sides of the oil inlet, an oil outlet pipe is arranged at the lower end of the tank body, a support is arranged at the upper end in the tank body, a pre-filtering assembly is arranged on the support, a lifting seat is arranged below the pre-filtering assembly, the hydraulic cylinders are correspondingly connected with the lifting seat, and a fine filtering assembly is arranged on the lifting seat; a blow-off pipe is arranged at the lower end of the fine filtering assembly, an oil outlet is formed in the bottom of the fine filtering assembly, a metal corrugated pipe is arranged between the oil outlet and the oil outlet pipe, a funnel-shaped groove is formed in the bottom of the tank body, the lowest position of the groove is communicated with the blow-off pipe, a rotating scraper is arranged above the groove in the radial direction of the tank body, and a rotating shaft penetrates through the center of the rotating scraper. A liquid level meter is arranged at the position, corresponding to the impurity collecting bin, of the outer side of the tank body; the utility model overcomes the defects of the prior art, realizes multi-stage fine filtration, automatic impurity cleaning, separation and collection, and ensures efficient and stable operation of filtration.

The invention discloses a hydraulic system and hydraulic equipment for self-adaptive buffering under impact. Comprising a hydraulic motor used for driving an execution element, a closed type pump set used for driving the hydraulic motor, and a first oil way used for connecting an oil outlet of the closed type pump set with an oil inlet of the hydraulic motor. The second oil way is used for connecting an oil outlet of the hydraulic motor with an oil inlet of the closed type pump set; the self-adaptive cushion valve set is used for weakening pressure impact of the oil way on the high-pressure side and avoiding pressure suction of the oil way on the low-pressure side; oil inlets and oil outlets of the two self-adaptive buffer valve groups are oppositely connected with the first oil way and the second oil way in parallel; the hydraulic closed system is ingenious in structure, the self-adaptive buffer valve group can weaken pressure impact of a high-pressure side oil way, meanwhile, the situation that the pressure of a low-pressure side is rapidly reduced or even air is sucked is avoided, normal work of the hydraulic closed system is guaranteed, and the service life of the hydraulic closed system and all elements can be prolonged.

The invention discloses a motor stator oil duct connectivity detection device and a detection method thereof, relates to the technical field of detection devices, and is used for solving the technical problem that the detection device cannot detect the connectivity of a stator oil duct with a zigzag section. The detection device comprises a base, a pressure plate, an air pump and a pressure detection device. The pressure plate can be detachably connected with the base, so that at least part of the stator is fixed between the base and the pressure plate; a sealed cavity is formed among the pressure plate, the base and the stator; the sealing cavity is suitable for being communicated with an oil inlet of the stator; an air inlet communicated with the sealing cavity is formed in the base; one of the air pump and the pressure detection device is communicated with the air inlet, and the other one is communicated with the oil outlet of the stator.

The utility model relates to a hydraulic system, in order to solve the problem that when an engine of an existing loader is started, an energy accumulator of a braking system is filled with liquid to increase the starting load of the engine, the hydraulic system of the loader comprises a liquid filling valve, a flow amplifying valve, a two-position three-way valve and a shuttle valve, an oil inlet of the prefill valve is connected with a CF port of a priority valve in the flow amplification valve; an oil inlet, an oil outlet and an oil return port of the two-position three-way valve are correspondingly connected with an S signal port of the prefill valve, a first oil inlet end of the shuttle valve and an oil tank loop, the oil outlet of the two-position three-way valve is selectively communicated with the oil inlet or the oil return port, and an LS1 signal port of the flow amplification valve is communicated with a second oil inlet end of the shuttle valve. And the oil outlet end of the shuttle valve is connected with a control signal port of the priority valve. The hydraulic system of the loader does not have a liquid filling load when the engine is started, and is easy to start.

The utility model discloses a motor and a stator core, and the motor comprises a housing which is provided with an oil inlet; the stator core is arranged in the shell; the winding is arranged on the stator core; in the radial direction, the middle part of the stator core and the shell jointly define a first oil inlet channel, the first oil inlet channel surrounds the middle part in the circumferential direction and communicates with an oil inlet of the shell, the middle part comprises a turbulent flow part, and the turbulent flow part defines a plurality of oil inlet branches communicating with one another in the first oil inlet channel; in the axial direction, the end parts of the stator iron core are arranged on the two opposite sides of the middle part, part of the end parts are in sealed connection with the shell, and each end part comprises a second oil inlet channel and an oil spraying hole; in the axial direction, one end of the second oil inlet channel communicates with the oil inlet branch, and the other end of the second oil inlet channel communicates with the oil spraying hole. The cooling device can improve the cooling effect and reduce the production cost.

The invention relates to an oil flow guide structure, a cooling device and a transformer coil, and is applied to the field of oil-immersed transformers. The oil guide assembly comprises a plurality of oil guide supporting strips, and the oil guide supporting strips can extend in the first direction and are attached to at least one side wall of a coil of the transformer; an oil guide cavity is formed in the oil guide supporting strip, an oil inlet used for inputting cooled insulating oil is formed in the oil inlet end of the oil guide supporting strip, an oil outlet is formed in the side, close to the closed end, of the surface of the oil guide supporting strip, and the oil outlet is used for conveying oil in the oil guide cavity to an upper coil of a transformer coil. According to the cooling device, the semiconductor chilling plate is used for generating cooled insulating oil, the cooled insulating oil is input into the oil guide cavity from the oil inlet and conveyed to the hot spot area of the upper coil of the transformer through the oil outlet communicated with the oil guide cavity, the cooled insulating oil is mixed with oil flow flowing in the upper coil, and therefore the average temperature of the oil flow is reduced, and the cooling efficiency is improved. Meanwhile, the oil flow is increased, and the heat dissipation capacity of the hot spot area of the upper coil of the coil is enhanced.

The invention relates to the technical field of motors, and discloses an oil injection direct-cooling heat dissipation structure which is installed inside a motor, an inner cavity of the motor is provided with a stator iron core used for fixing a metal coil, an oil inlet is formed in a machine base, an oil channel is formed in the annular wall of the stator iron core, and the oil injection direct-cooling heat dissipation structure further comprises two oil injection rings symmetrically arranged on the two sides of the stator iron core; the cooled oil passing through the interior of the iron core reaches the top ends of the two sides of the oil channel, enters the oil guide pipes from the top ends and finally reaches the oil injection rings symmetrically arranged on the two sides of the stator iron core. And the oil injection ring sprays and cools the end parts of the rotor and the stator iron core coil. Therefore, the cooling oil completes the cooling task of all the key heating areas. And the cooling oil after heat exchange is collected to the bottom of the motor under the action of gravity. Collected oil liquid is subjected to heat dissipation through an external cooling system, and is pumped into the oil inlet through the oil pump after being cooled, so that a complete cooling cycle is formed.

The invention relates to the technical field of hydraulic servo control, in particular to an integrated hydraulic execution device and method based on self-correcting force-displacement coupling, and the device comprises a hydraulic cylinder, a servo valve, a one-dimensional force sensor, a displacement sensor, an oil inlet pressure sensor, an oil outlet pressure sensor and an edge calculation unit; wherein the servo valve is mounted at an oil inlet of the hydraulic cylinder; the one-dimensional force sensor is mounted at the end of a hydraulic cylinder piston rod; the displacement sensor is arranged in the hydraulic cylinder barrel; the oil inlet pressure sensor and the oil outlet pressure sensor are respectively mounted at an oil inlet and an oil outlet of the hydraulic cylinder; the edge calculation unit is integrated on the outer wall of the hydraulic cylinder and is connected with all the sensors and the servo valve through signal lines; wherein the edge calculation unit operates a self-correcting force-displacement coupling control algorithm, residual error characteristics of all sensors are used as input, the corrected opening degree of a servo valve is output in real time, and closed-loop accurate control over the hydraulic cylinder is achieved.

The utility model belongs to the technical field of hydraulic valves, and discloses a two-stage buffer overflow valve and a fluid control assembly. The two-stage buffering overflow valve comprises a valve seat assembly, a valve body, a valve element mechanism, an oil passing channel and a buffering piston, the valve seat assembly is provided with an oil inlet, the valve body is arranged at the end, away from the oil inlet, of the valve seat assembly in a sleeving mode, the valve body is provided with an oil outlet, and the valve element mechanism comprises a sliding valve element arranged in the valve seat assembly in a sliding fit mode; the end, away from the oil inlet, of the sliding valve element is provided with a secondary pressure building cavity, the secondary pressure building cavity communicates with the oil inlet, at least part of the oil passing channel is arranged on the sliding valve element and / or the valve seat assembly and / or the valve body, and the oil passing channel communicates with the secondary pressure building cavity and the oil outlet; the buffer piston is arranged on the valve seat assembly in a sliding and sleeving mode and can block or open the oil outlet. By prolonging the completion time of secondary pressure establishment, the buffering effect is improved, and the impact generated when the hydraulic motor is started and braked is reduced.

The invention relates to the technical field of electronic oil pumps, in particular to an efficient internal circulation heat dissipation structure of an electronic oil pump and a control method. The interior of the outer shell is hollow, and the pump cover is arranged at an opening of the outer shell; the controller is arranged at the closed end of the shell; the center shaft is arranged in the shell in the axial direction, and the two ends of the center shaft are communicated to form a first oil channel of a hollow structure; a first assembling space used for assembling a pump body, a second assembling space used for assembling a motor and a third assembling space used for assembling a controller are sequentially formed in the inner space of the outer shell in the axis direction, one end of the first oil liquid channel is opposite to the oil inlet, and the other end of the first oil liquid channel is opposite to the second assembling space. A second oil channel is formed at the joint of the second assembly space and the third assembly space, and a third oil channel is formed between the inner side face of the outer shell and the outer diameter of the controller at intervals; internal circulation heat exchange efficiency of the electronic oil pump is improved, and working efficiency and service life of products are guaranteed.

The utility model discloses a novel lubricating pump oil outlet structure capable of adjusting the oil outlet amount, and relates to the technical field of lubricating pumps. The pump body is in threaded fit with the adjusting valve element seat, and the adjusting valve element seat is fixedly connected with the hexagon nut, so that after the hexagon nut is rotated, the valve element is driven to rotate clockwise or anticlockwise so as to adjust the size of the quantitative cavity, and the requirement for flexible adjustment of the oil outlet amount is met; according to the oil pump, the motor drives the cam to rotate and drives the pump core to do reciprocating motion, when the pump core moves rightwards, oil in the quantitative cavity is pushed, so that the valve element is pushed, finally, the oil in the quantitative cavity reaches an oil outlet channel through a through hole of an oil receiving groove of the valve element to be discharged, and when the cam is far away from the pump core, a reset spring of the pump core resets the pump core. And meanwhile, the valve element spring is adjusted to reset the valve element, at the moment, the oil inlet of the pump body sucks oil from the oil tank to fill the quantitative cavity, and the next oil outlet action of the pump element continues to be waited.

The invention provides a motor and a vehicle, and relates to the technical field of vehicles, the motor comprises a casing, a stator winding, a stator core, a first sealing ring and a second sealing ring, one end of the first sealing ring and one end of the second sealing ring are respectively in sealing connection with two axial ends of the stator core, and the other end of the first sealing ring and the other end of the second sealing ring are respectively in sealing connection with the casing. The first sealing ring, the stator iron core and the machine shell define a first oil cavity communicated with the oil inlet, the second sealing ring, the stator iron core and the machine shell define a second oil cavity communicated with the oil inlet, and the two axial ends of the stator winding are located in the first oil cavity and the second oil cavity respectively. The machine shell is provided with a first oil passing channel communicating with the first oil cavity and a second oil passing channel communicating with the second oil cavity, and the first oil passing channel and the second oil passing channel communicate with the oil outlet. Therefore, the stator winding can be soaked and cooled, and cooling oil can be prevented from entering a rotor air gap for oil stirring, so that the cooling effect and efficiency of the motor are improved.

The utility model relates to a lubricating oil monitoring system, and belongs to the technical field of lubricating oil recycling pipelines. The lubricating oil quality detection device comprises an oil tank, an oil pump, a lubricating oil using device, a lubricating oil quality detection sensor assembly and a control system, the inlet end of the oil pump is connected with the oil tank through an oil inlet pipe, and the outlet end of the oil pump is connected with an oil inlet of the lubricating oil using device through an oil outlet main pipe. An oil outlet of the lubricating oil using equipment is connected with the oil tank through a main oil return pipe, an oil coarse filter is arranged at the inlet end of the oil inlet pipe, an oil fine filter and a first oil cooler are sequentially installed on the main oil outlet pipe from front to back, a detection oil pipe is connected to the position, on the downstream side of the first oil cooler, of the main oil outlet pipe, and a detection box is connected to the tail end of the detection oil pipe. The detection box is connected with the oil tank through a bypass oil return pipe, the lubricating oil quality detection sensor assembly is arranged in the detection box, and a first temperature sensor and a first pressure gauge are arranged on the oil outlet main pipe and located on the downstream side of the connecting point of the detection oil pipe and the oil outlet main pipe.

The invention discloses a motor rotor cooling structure, a motor rotor and a motor, and relates to the technical field of motors, the cooling structure comprises a rotating shaft, two end plates and a rotor core, the rotating shaft is axially provided with a rotating shaft oil duct, the two sides of the rotating shaft are radially provided with at least one first oil inlet duct communicated with the rotating shaft oil duct, and the two end plates sleeve the two sides of the rotating shaft. At least one second oil inlet groove is formed in the middle of each end plate, at least one oil outlet groove is formed in the edge of each end plate, the rotor iron core is arranged outside the rotating shaft in a sleeving mode and located between the two end plates, and at least two oil passing channels are formed in the rotor iron core in the axial direction; one first oil inlet channel on any side of the rotating shaft is sequentially communicated with one second oil inlet groove and one oil passing channel of one corresponding end plate and one oil outlet groove of the other end plate, so that a cooling medium flows inwards from the two sides of the rotor core in two directions at the same time, and the condition that the oil temperature of the cooling oil outlet side is higher than that of the oil inlet is avoided; the cooling efficiency is improved, and the cooling quality and effect are guaranteed.

Disclosed is a loop switching valve, comprising a valve body and a valve core arranged in the valve body, wherein the valve core comprises a valve core oil drainage channel arranged in the valve core, and the valve body comprises an oil drainage port (L), a valve body oil drainage channel arranged in the valve body, and a plurality of oil inlets and working oil ports; and the oil inlet is in communication with the corresponding working oil port in a working state, the working oil port in a non-working state is in communication with the oil drainage port (L) by means of the valve core oil drainage channel and the valve body oil drainage channel, so as to discharge hydraulic oil from the working oil port in the non-working state, thereby preventing misoperation. The problems in the prior art of leakage, oil cross-flow and pressure building of a multi-way directional control valve during loop switching are solved, so that the reliability of the system is greatly improved, and the requirements for daily inspection and maintenance of apparatuses by an apparatus management user are also reduced. Further disclosed are a crawler crane chassis hydraulic system using the loop switching and a crawler crane.

The atomization device comprises a first shell, a second shell, an oil storage assembly, an atomization core assembly, a communication assembly, a first regulation and control assembly and a second regulation and control assembly, the second shell is detachably connected with the first shell, the oil storage assembly is located in the first shell, the oil storage assembly is provided with an oil outlet, and the atomization core assembly is located in the first regulation and control assembly. The atomizing core assembly is located in the first shell and provided with an oil inlet. The communicating assembly is located in the first shell and communicates between the oil outlet and the oil inlet. The first regulation and control assembly is located in the first shell and used for controlling the communicating state of the oil outlet and the oil inlet. And the second regulation and control assembly is located in the second shell, when the second regulation and control assembly is in the first operation state, the second regulation and control assembly controls the first regulation and control assembly to enable the oil outlet to communicate with the oil inlet, and when the second regulation and control assembly is in the second operation state, the second regulation and control assembly controls the first regulation and control assembly to block the space between the oil outlet and the oil inlet.

The invention discloses a lubricating structure for a front integrated type wind power gear box and the wind power gear box, relates to the technical field of wind power gear boxes, and aims to solve the technical problem of lubrication failure caused by large deformation of floating parts of the front integrated type gear box in the prior art. In the lubricating structure for the front integrated wind power gear box, lubricating oil is pumped into an oil inlet of a bearing cover, the oil inlet is connected to an inlet hole of an oil distribution ring through a first oil way, the lubricating oil flows into an interlayer of a hollow pipe through the oil inlet hole, and the hollow pipe is in clearance fit with the inner side of the oil distribution ring; when lubricating oil flows into an interlayer of the hollow pipe, namely the second oil way, all oil can reach an outlet of the second oil way through the annular structure, the outlet of the second oil way is communicated with the oil distribution flange, and the lubricating oil enters an inner hole of the oil distribution flange, namely the third oil way through the oil hole until reaching an unblocked outlet. The fourth oil way is all internal oil ways from the planet carrier to gear lubrication, an inlet of the fourth oil way is communicated with an outlet of the third oil way, and lubricating oil enters from the outlet to reach a gear lubrication point.

The invention discloses an underwater plugging technology of a watertight connector, and aims to provide a test device of an underwater plugging connector and a control method thereof, and the key points of the technical scheme are that the test device comprises a sealing test cabin which comprises a cylindrical cabin body, an upper end cover and a lower end cover; the plugging mechanical assembly comprises a guide structure arranged in the cabin body, a socket fixing plate is coaxially arranged in the middle of the cabin body, a support fixing plate is coaxially arranged in the cabin body close to the bottom, a plug moving plate located between the socket fixing plate and the support fixing plate is coaxially arranged in the cabin body, and a telescopic oil hydraulic cylinder is arranged on the top surface of the support fixing plate; an oil inlet and an oil outlet of the telescopic oil hydraulic cylinder are fixedly connected with oil pipes respectively, and the other ends of the oil pipes are fixedly connected with an external hydraulic oil source. The underwater motor assembly is used for generating simulated water flow in the cabin; the pressure adjusting module is used for simulating underwater pressure at different depths; the control system is used for controlling all the parts to operate cooperatively; the invention is suitable for the technical field of underwater plugging of the watertight connector.

The invention provides an integrated device and method for adjusting the air flow and heat of an aero-engine, and relates to the field of aero-engines. In the device, an air path shell is connected with an oil path shell, the first connecting end of a piston rod is connected with a main valve element through a connecting base, and the second connecting end of the piston rod is connected with the first connecting end of a piston; a third connecting end of the piston rod is connected with the linear displacement sensor; a second connecting end of the piston is in contact with the interior of the left valve sleeve; an oil inlet of the oil way shell is connected with an input oil port of the electro-hydraulic servo valve, an oil return port of the oil way shell is connected with an oil return port of the electro-hydraulic servo valve, the first working oil port is connected with the left valve sleeve, and the second working oil port is connected with the right valve sleeve. The adjusting method comprises the steps of air heat adjusting and air heat flow simultaneous adjusting. The flow and heat of air entering the air compressor can be distributed to prevent an aero-engine from freezing and surging, meanwhile, high-temperature gas is prevented from directly heating an oil way, and the requirements for light weight and integration of the aero-engine are met.

An overload protection device of a rotary cultivator is simple in structure, an overflow valve is mounted on an oil supply pipeline of a hydraulic motor, and when a rotary blade or a rotary blade shaft touches an obstacle which cannot be cut off, hydraulic pressure at an oil inlet of the hydraulic motor is increased suddenly, so that the overflow valve is opened to quickly release pressure, and the rotating speed and torque of the hydraulic motor are quickly reduced; therefore, impact is buffered, overload protection is achieved, and the rotary blade and the blade shaft can be protected. Meanwhile, after the rotary blade can rotate at a low speed to bypass an obstacle, the oil supply management hydraulic pressure is lowered, the overflow valve is closed, so that normal oil supply to the hydraulic motor is recovered, the working state of the rotary blade can be automatically recovered, manual operation is not needed, use is very convenient, and efficiency is high. In addition, a buffering assembly can be additionally arranged, the transmission tile is driven to be far away from the cutter shaft through hydraulic force generated when the oil pressure of the oil supply pipeline is increased suddenly, and therefore power between the rotary blade or the cutter shaft and the hydraulic motor is rapidly disconnected, impact force is rapidly buffered, and overload protection performance is further improved.

An electric motor of the present disclosure may comprise: a housing; a stator positioned inside the housing; and a rotor positioned inside the stator, wherein the stator may include: a hollow cylinder-shaped core having a slot formed to extend through opposite ends of the core in an axial direction of the core; a coil which is wound around the slot and through which a current flows; and a sleeve extending along the slot and surrounding a side surface of the coil, the sleeve forming a flow path between the sleeve and the coil, the core may include a hole formed from the outer circumferential surface of the core toward the slot and communicating with the flow path of the sleeve, and the housing may include an oil inlet formed in the housing.