8results about How to "Avoid vacuuming" patented technology

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.

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 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 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 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 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.