21results about How to "Avoid vacuuming" patented technology

The utility model belongs to the technical field of motors, and provides a shell oil baffle rib structure which comprises an oil stirring gear, an oil baffle plate, an oil baffle rib and a shell. Wherein the oil baffle plate is mounted in an inner cavity of the shell, and the oil stirring gear is rotationally mounted on one surface of the oil baffle plate; the multiple oil baffle ribs are located on the shell and located on the surface, away from the oil stirring gear, of the oil baffle plate, and an inner space defined by the multiple oil baffle ribs, the oil baffle plate and the shell serves as an oil storage cavity; the oil storage cavity is located in an inner cavity of the shell, communicates with the inner cavity of the shell and is used for keeping dynamic balance with the height of oil in the inner cavity of the shell and collecting backflow oil. According to the utility model, the oil storage cavity is formed in the inner cavity of the shell by adopting the structures such as the oil baffle plate and the oil baffle rib, and the oil storage cavity is communicated with the inner cavity of the shell, so that the height of oil in the inner cavity of the shell keeps dynamic balance, and the backflow oil is collected.

The utility model relates to mechanical and manufacturing technical field mainly relates to a kind of dacron-polyester composite window curtain fabric roll bagging equipment, it includes conveying device, bagging device and sealing device, conveying device horizontal conveying cloth roll, along the conveying direction of cloth roll, bagging device and sealing device are sequentially provided, bagging device includes bagging mechanism, bag opening mechanism and bagging mechanism, bagging mechanism and bag opening mechanism link, bagging mechanism one by one adsorbed packing bag is lifted, this bag opening mechanism receives the packing bag of bagging mechanism lifting and carries out bag opening processing, bagging mechanism and bag opening mechanism side by side, the bagging mechanism is located above the conveying path of conveying device, and the bagging mechanism is packed into the packing bag opened by bag opening mechanism in the cloth roll conveyed by conveying device, sealing device includes horizontal moving mechanism, shaping mechanism and sewing machine, horizontal moving mechanism carries the cloth roll after bagging to the packing bag bag mouth of cloth roll clamped by shaping mechanism after place is sewn by sewing machine, realizes effective sealing and automation.

This invention discloses an anti-shock hydraulic closed-loop pump control system and hydraulic machinery. The anti-shock hydraulic closed-loop pump control system includes a closed-loop pump assembly and a power component, as well as two anti-shock valve assemblies arranged in parallel with the power component. The inlet of one anti-shock valve assembly is connected to the first end of the power component, and the inlet of the other anti-shock valve assembly is connected to the second end of the power component. Each anti-shock valve assembly includes an externally controlled buffer valve, a buffer damper, and an accumulator. The externally controlled buffer valve has a feedback end and a control end on opposite sides of its valve core. The control end has a spring for driving the valve core to move and close towards the feedback end. The inlet of the externally controlled buffer valve has a feedback oil circuit connected to the feedback end and a control oil circuit connected to the control end. The buffer damper and the accumulator are sequentially arranged on the control oil circuit. The anti-shock hydraulic closed-loop pump control system provided by this invention can reduce pressure shocks on the high-pressure side of the oil circuit and prevent rapid pressure drops on the low-pressure side of the oil circuit.

The present invention provides an anti-cavitation hydraulic control system and an operating machine. The anti-cavitation hydraulic control system includes a first oil circuit and a second oil circuit, one end of the first oil circuit is connected to the first oil chamber of the hydraulic actuator, one end of the second oil circuit is connected to the second oil chamber of the hydraulic actuator, and also includes a pressure regulating valve and a first non-return valve; one end of the valve stem of the pressure regulating valve is provided with a hydraulic control end, and the other end of the valve stem is provided with an elastic end; the oil circuit channel of the pressure regulating valve is provided in at least one of the first oil circuit and the second oil circuit, and the first non-return valve is connected in parallel to the two ends of the oil circuit channel of the pressure regulating valve; when the oil circuit channel of the pressure regulating valve is provided in the first oil circuit, the hydraulic control end of the pressure regulating valve is connected to the second oil chamber; when the oil circuit channel of the pressure regulating valve is provided in the second oil circuit, the hydraulic control end of the pressure regulating valve is connected to the first oil chamber. The present invention can not only avoid the energy loss of the hydraulic actuator due to the excessive back pressure on the return oil side, but also prevent cavitation from occurring on the oil inlet side of the hydraulic actuator.

The utility model discloses an air suction prevention structure of a fuel tank, which belongs to the field of fuel tanks, can ensure that fuel supply does not suck air through a rotatable extended fuel suction pipe and a rotary adjusting piece at the end part of the extended fuel suction pipe when the fuel of an excavator is less and the working inclination angle is larger, and is simple in structure and low in cost. The device mainly comprises a fuel tank, a fixed oil suction pipe is fixedly arranged at the bottom of the fuel tank, the fixed oil suction pipe is rotationally connected with an extended oil suction pipe through a rotary joint, and a rotary adjusting piece is arranged at the end of the extended oil suction pipe. The anti-empty-suction device is mainly used for preventing empty suction of the fuel tank.

This invention discloses a torque balancing device and an oil supply and return system, belonging to the technical field of submersion motion test equipment. The torque balancing device is installed on a submersion motion test bench, which includes a column, a platform located inside the column, a crossbeam fixed to the top of the column, and a lifting actuator fixed above the crossbeam. The movable end of the lifting actuator is connected to the platform. The torque balancing device is located between the column and the platform. It is used to counteract the overturning torque caused by the control error of the lifting actuator and the overturning torque caused by a malfunction in the control system of the submersion motion test bench, thus enabling the platform to move vertically along the column. The torque balancing device includes a torque balancing cylinder, a ball joint, and a hydrostatic support plate. The torque balancing cylinder is fixed to the corner beam of the platform, and the hydrostatic support plate is attached to the surface of the column. The piston rod of the torque balancing cylinder is connected to the ball head of the ball joint by screws, and the ball socket of the ball joint is connected to the hydrostatic support plate by screws.

The invention discloses a hydraulic cooler control valve bank, a hydraulic system and a control method.The hydraulic cooler control valve bank comprises a first electromagnetic valve, a second electromagnetic valve, an overflow valve, a first one-way valve, a control valve bank port P, a control valve bank port T, a control valve bank port A1, a control valve bank port A and a control valve bank port B; a main oil inlet P of the first electromagnetic valve is communicated with a port P of the control valve group, a control oil port A of the first electromagnetic valve is communicated with a port A1 of the control valve group, a control oil port B of the first electromagnetic valve is divided into two paths, one path is communicated with an oil inlet of the overflow valve, and the other path is communicated with a main oil inlet P of the second electromagnetic valve; a control oil port A of the second electromagnetic valve is communicated with a port A of the control valve set, a control oil port B of the second electromagnetic valve is connected with a port B of the control valve set, the inlet end of the first one-way valve is communicated with the port B of the control valve set, and the outlet end of the first one-way valve is communicated with the port A of the control valve set. And a control oil port B of the second electromagnetic valve, a main oil return port T of the second electromagnetic valve, an oil outlet of the overflow valve and a port B of the control valve group are respectively communicated with a port T of the control valve group. The intelligent cooling system is good in intelligent degree, cooling effect and safety performance.

This application belongs to the field of hydraulic valve assemblies, and particularly relates to an overflow replenishing valve assembly and mechanical device for a power head motor. One end of the first and second main oil passages of the overflow replenishing valve assembly is connected to the inlet and outlet of the power head motor, respectively. The other end of the first and second main oil passages is used to connect to the oil supply system. The first return port is connected to the main return oil circuit of the oil supply system, and the second return port is connected to a drain port on the power head motor. The first and second overflow valves limit the maximum pressure of the overflow replenishing valve assembly and the power head motor. The first and second check valves replenish oil when negative pressure occurs at the oil port of the power head motor. The third check valve directs oil to the low-pressure side of the inlet and outlet of the power head motor when the drain pressure of the motor housing exceeds the preset pressure, ensuring that the pressure of the motor housing does not exceed the preset pressure. The third check valve also provides nearby oil replenishment to the low-pressure side of the inlet and outlet of the power head motor, preventing cavitation.

The invention discloses a method for bonding surface nanocrystallization copper columns in an air environment, and belongs to the field of electronic packaging. The method comprises the following steps: depositing metal Ti and Cu on a silicon substrate; photoetching and developing to prepare an array pattern; a copper column array is obtained through electro-deposition; preparing a Cu nanowire array through anodic oxidation electrochemical reduction; and preparing an organic reducing agent, coating and carrying out thermocompression bonding. The patterned copper nanowire array salient points can be prepared, and the high-temperature-resistant photoresist is combined to serve as a heat-conducting medium, so that an additional filling step is not needed; high-quality copper-copper interconnection can be realized in a low-temperature air environment, and the defects of overhigh copper interconnection temperature and dependence on a bonding environment are overcome; the copper nanowires with a certain height are compressed in the direction perpendicular to the substrate during interconnection, the requirement for surface flatness is lowered, the chemical mechanical polishing process is not needed, and meanwhile the interconnection defect caused by alignment deviation is overcome. The method is simple in preparation process, low in cost and suitable for a low-temperature interconnection technology for three-dimensional packaging and superfine pitch packaging.

The utility model belongs to the technical field of hydraulic systems, and discloses a hydraulic control system and engineering machinery, the hydraulic control system comprises an oil tank, an oil pump, a reversing valve, a first hydraulic motor, a second hydraulic motor and an oil supplementing piece, the oil tank is communicated with an oil inlet of the reversing valve through the oil pump, and a working oil port A1 of the reversing valve is communicated with an oil port B1 of the first hydraulic motor; an oil port B2 of the first hydraulic motor communicates with an oil port C1 of the second hydraulic motor through a first communicating pipe, an oil port C2 of the second hydraulic motor communicates with a working oil port A2 of the reversing valve through a third communicating pipe, and the oil supplementing part is used for conveying hydraulic oil to the first communicating pipe or conveying the hydraulic oil of the first communicating pipe to the third communicating pipe; the engineering machinery comprises the hydraulic control system. The hydraulic control system provided by the utility model is used for engineering machinery and can avoid air suction or pressure building of an oil way caused by inconsistent rotating speeds of the two hydraulic motors during turning, so that the problem of differential speed is solved.

The present disclosure provides an anti-sloshing tank, belonging to the technical field of hydraulic equipment. The anti-sloshing tank comprises an outer tank body, an inner tank body, a support assembly and an electromagnetic assembly; the inner tank body is located in the outer tank body; the support assembly is located in the outer tank body, and the support assembly is connected with the inner tank body and the outer tank body respectively, so that the inner tank body can rotate relative to the support assembly; the electromagnetic assembly is located between the inner wall of the outer tank body and the outer wall of the inner tank body, and the electromagnetic assembly is configured to drive the inner tank body to rotate after being powered. The present disclosure can effectively inhibit the sloshing of the oil in the tank body through the anti-sloshing tank.

The utility model provides a flow control oil supply system which comprises a first filter and a flow distribution valve, an inlet of the first filter is connected with an oil tank, and an outlet of the first filter is respectively connected with a lubricating pump and an oil supplementing pump. An outlet of the lubricating pump is connected with a heat dissipation unit, and an outlet of the heat dissipation unit is connected with a lubricating connector. An outlet of the oil recharging pump is provided with an oil recharging control unit; the oil recharging control unit is connected with a closed system oil recharging interface; an inlet of the flow distribution valve is connected with the oil supplementing control unit, a first outlet of the flow distribution valve is connected with the heat dissipation unit, and a second outlet of the flow distribution valve is connected with an outlet of the first filter. According to the utility model, through the lubricating pump and the oil supplementing pump, the oil supply of the lubricating system and the oil supplementing system is realized, the use of a large-displacement pump is omitted, the occupied space is small, the cost is reduced, and the volumetric efficiency is improved; and the flow of each path of oil can be adjusted according to requirements.

The utility model discloses a recycling device for circulating acid pump cooling water, including collecting liquid tank, inlet automatic valve, filter, circulating pump, outlet automatic valve, external exhaust pipeline, emergency water supply pipe, pressure gauge, circulating pipeline and temperature detection meter, and collecting liquid tank is equipped with ph detection meter, return pipeline and apron, and apron is located in the upper end of collecting liquid tank, and return pipeline one end stretches into collecting liquid tank, and ph detection meter is located in the upper end of apron, and inlet automatic valve, filter, circulating pump, outlet automatic valve and temperature detection meter are installed from left to right on circulating pipeline, and circulating pipeline one end stretches into collecting liquid tank, and pressure gauge, external exhaust pipeline and emergency water supply pipe are installed from left to right on circulating pipeline output end, and the utility model discloses the pH detection meter monitoring cooling water acidity, combines external exhaust pipeline and emergency water supply pipe and realizes automatic blowdown, water replenishment, and temperature detection meter monitors cooling water temperature, ensures that temperature maintains in safety threshold, and filter filters the impurity in cooling water, can effectively avoid pipeline blockage.

The invention, which relates to the technical field of the water eddy current dynamometer, discloses a high-power high-rotation-speed superposed water eddy current load dynamometer comprising a base, a dynamometer main body and a rotating shaft, the rotating shaft is installed at the output end of the dynamometer main body, and a driving locking shaft head is installed at the outer end of the rotating shaft. The outer supporting diameter adjusting arc plate is arranged on the outer side of the driving locking shaft head, and the pull-back pressing arc strip plate is installed on the outer side of the outer supporting diameter adjusting arc plate. The disc body locking assembly is arranged at the outer end of the rotating shaft, after the rotor sleeve and the disc body are installed, the disc body is stably limited by the disc body locking assembly, vibration generated in the high-speed rotating process of the disc body is effectively reduced through multiple stable limiting, it is ensured that the disc body is kept balanced in the rotating process, and the rotating speed is improved. The stable disc body can reduce the energy loss caused by vibration or imbalance, so that the dynamometer can respond to the output change of the tested equipment more quickly in the testing process, and the testing stability and accuracy are improved.

The application provides a hydraulic control system, method and excavator. The hydraulic control system comprises: a first oil circuit, which is communicated with a rodless cavity of a boom cylinder; a second oil circuit, which is communicated with an oil tank; a third oil circuit, which is communicated with a rod cavity of the boom cylinder; a proportional valve, which comprises an oil inlet communicated with the first oil circuit, an oil return communicated with the second oil circuit and an oil outlet communicated with the third oil circuit; wherein the proportional valve comprises a forward proportional valve and a reverse proportional valve arranged in parallel, the oil return of the forward proportional valve is kept communicated with the oil inlet, and the oil return of the reverse proportional valve is kept communicated with the oil outlet. When the boom is lowered, the hydraulic oil flowing out of the rodless cavity can flow to the oil tank through the forward proportional valve, so that the hydraulic oil can flow more and more timely into the rod cavity through the reverse proportional valve with a larger flow area, thereby preventing the boom cylinder from being sucked or exploded, avoiding causing significant damage to the hydraulic control system and elements thereof, and prolonging the service life of the hydraulic control system.

The utility model relates to the technical field of waste water recovery, in particular to a waste water recovery device which comprises a device frame, a liquid storage tank is mounted in the device frame, a mounting seat is mounted on the surface of the top of the liquid storage tank through screws, and a controller is mounted on the surface of the device frame. An indicator lamp is installed on the surface of the controller, a stainless steel centrifugal pump is installed on the surface of the top of the mounting base, a liquid level detection mechanism is arranged on the surface of the liquid storage tank, and a vacuumizing prevention mechanism is arranged on the surface of the liquid storage tank. When the recovery device is used, the stainless steel centrifugal pump can be automatically controlled to be started or closed, water shortage protection and overflow prevention can be carried out on the interior of the liquid storage tank when the recovery device is used, and the phenomenon that water cannot enter the liquid storage tank due to vacuum pumping or internal pressure can be prevented when the recovery device is used.

This application discloses a hydraulic control system for a rotary drilling rig and a rotary drilling rig itself, relating to the field of rotary drilling rig technology. The hydraulic control system includes a power head motor with a forward rotation port and a reverse rotation port. The forward rotation port is connected to a forward rotation port oil circuit, and the reverse rotation port is connected to a reverse rotation port oil circuit. When the power head motor reverses, the hydraulic oil in the forward rotation port oil circuit flows to the oil tank through the return port. The hydraulic control system also includes a balance valve assembly and a replenishment oil circuit. The balance valve assembly is located in the forward rotation port oil circuit and is used to generate pressure when the drill rod releases its elastic torsional force to resist drill rod reset. The replenishment oil circuit is connected to the return port and the reverse rotation port oil circuit and is used to replenish the hydraulic oil from the return port to the reverse rotation port to prevent the power head motor from sucking in cavitation. The above-mentioned hydraulic control system for a rotary drilling rig solves the problem that after forward drilling is completed, the drill rod's elastic torsional rebound causes the power head to reverse rapidly, resulting in motor stall and cavitation.

The bubble generating device is suitable for being detachably installed on a faucet and comprises a body, a sealing piece, a liquid conveying piece and an air blowing piece. The body is provided with a water inlet hole, a liquid storage cavity and a foam outlet which are sequentially communicated, the water inlet hole is suitable for being communicated with a faucet, and a medium suitable for being mixed with water to form foam liquid is stored in the liquid storage cavity; the sealing piece is arranged on the body and is suitable for opening the water inlet hole under the action of water pressure, so that water can enter the liquid storage cavity through the water inlet hole to be mixed with a medium to form foam liquid, and when the body is arranged on a faucet and a faucet water path is opened, enough impact can be generated due to large water power generated by the faucet, so that the water and the medium are fully mixed. And compared with hand-operated mixing, the operation is more convenient and labor-saving, and the child can also realize the operation without disassembling to pour the water into the liquid storage cavity. The sealing piece seals the water inlet hole when not subjected to the water pressure effect, and therefore the situation that when the body is detached from the faucet, media or foam liquid flows out of the water inlet hole, and waste is caused is prevented.

The utility model provides a kind of hydraulic pump anti-suction empty device and tractor hydraulic pump mounting structure, and hydraulic pump anti-suction empty device includes: oil tank, its inside is equipped with oil storage cavity;Oil suction pipe, it is fixed on the oil tank, and the lower end of oil suction pipe is equipped with the first joint that can be used to connect external oil supplement device;External oil outlet pipe, it is fixed on the lower side of the oil tank, and the upper end of external oil outlet pipe is lower than the upper end of the oil suction pipe, and the lower end of external oil outlet pipe is equipped with the second joint that can be used to connect external hydraulic pump;The upper end of the oil suction pipe and the upper end of external oil outlet pipe are all communicated with the oil storage cavity.Using the utility model, oil liquid in oil tank interior can always immerse the upper end of external oil outlet pipe, when external oil supplement device is not stable to the oil supply of external oil outlet pipe, and oil liquid in oil tank interior guarantees the normal oil suction of hydraulic pump, effectively avoids the condition of pump suction empty, and the working performance of hydraulic pump is reliable.

The present invention discloses a sand-throwing fire extinguisher impeller rotation control valve group and a hydraulic system. The sand-throwing fire extinguisher impeller rotation control valve group includes a solenoid valve, a relief valve, a first logic valve and an electro-hydraulic reversing valve; the hydraulic system includes a sand-throwing fire extinguisher impeller rotation control valve group, a variable plunger pump, a quantitative gear pump and an externally controlled oil source valve. The present invention can realize the rotation speed change requirements of the impeller, reverse the impeller in the case of material blockage, and help the material to be discharged; the sand-throwing fire extinguisher impeller rotation control valve group can realize more energy saving when the system is unloaded, prevent impact protection system when the system overflows, and prevent system air suction caused by inertial rotation when the system is replenished with oil. The externally controlled external leakage electro-hydraulic reversing valve has a large flow rate, strong interchangeability, and better reversing performance, which provides a strong guarantee for the realization of the functions of the sand-throwing fire extinguisher.

The invention relates to the field of oil quality monitoring, in particular to a steady-flow and constant-pressure oil quality monitoring oil way adjusting mechanism which comprises an oil duct, a dynamic monitoring unit arranged on the oil duct, an adjusting unit arranged on the oil duct and located at the downstream end of the dynamic monitoring unit, a filter arranged on the adjusting unit and a liquid inlet end connected with the liquid outlet end of the filter, oil flowing in the detection channel is monitored through the detection terminal, meanwhile, kinetic energy generated by flowing of the oil impacts fan blades to drive spiral scraping pieces to circularly scrape the inner wall of the detection channel, the oil monitoring accuracy of the detection terminal is ensured, meanwhile, the detection efficiency is improved, and meanwhile the detection efficiency is improved. And when it is monitored that many impurities exist in the oil liquid, the transmission chain controls the sealing piece to seal the oil channel between the two first flow guide assemblies at the moment, so that the oil channel communicates with the second connecting pipe, and the oil liquid is filtered and adjusted through the filter in cooperation with suction of the power-assisted oil pump.