34results about How to "Avoid overflow loss" patented technology

The invention relates to a hydraulic control oil circuit, and provides a negative flow hydraulic control oil circuit in order to solve the problems of high oil consumption and high oil temperature caused by large overflow flow when a main pump operates at high pressure and full power in an existing negative flow hydraulic control system. The negative flow hydraulic control oil circuit comprises amain pump, a main control valve and a pressure shutoff valve. A neutral position oil returning throttle hole is formed in a neutral position oil returning channel of the main control valve, and the pressure cut-off valve includes a normally closed hydraulic control reversing valve, a pressure reducing valve and a shuttle valve. The liquid control end of the hydraulic control reversing valve is connected with the oil inlet end, and a pump opening of the main pump is connected with the oil inlet end through a pipe. The oil inlet end of the pressure reducing valve is connected with the oil outletend of the hydraulic control reversing valve, and the oil outlet end of the pressure reducing valve is connected with the second oil inlet end of the shuttle valve. The first oil inlet end of the shuttle valve is connected with the oil inlet end of the neutral position oil returning throttle hole, and a negative flow displacement controller of a main pump displacement regulator is connected withthe oil outlet end of the shuttle valve. According to the negative flow hydraulic control oil circuit, the displacement of the main pump is reduced when a machine operates under high pressure conditions, so that the main pump can operate at low power, high flow overflow loss is avoid, energy is saved, and the oil temperature is reduced.

The invention provides a valve control method and device, a valve, a storage medium and an electronic device. The method comprises the following steps that a flow value of a medium passing through a pipeline is collected; whether the flow value exceeds a first preset threshold or not is judged; and when the flow value exceeds the first preset threshold, a motor is controlled to close the valve ofthe pipeline. According to the method and device, the valve, the storage medium and the electronic device, the technical problem that in the prior art, the valve cannot be automatically controlled issolved.

The invention relates to a proportional valve and servo valve testing table. The table comprises an oil tank and a test valve group, wherein the oil tank is provided with an oil outlet pipe. The oil outlet pipe from the oil tank to the test valve group is sequentially provided with an oil pump, an oil filter, a pressure gage and an energy accumulator; the test valve group comprises a flow measuring device, a first three-way ball valve, a second three-way valve and a two-way ball valve; the three ports of the first three-way ball valve are separately connected with an oil outlet of the oil outlet pipe, one of the end of the flow measuring device, and an oil inlet of an oil return pipe; the three ports of the second three-way ball valve are separately connected with an oil outlet of the oiloutlet pipe, the other end of the flow measuring device and the oil inlet of the oil return pipe; the joint of the first three-way ball valve and the oil return pipe is arranged above the two-way ballvalve; and the oil outlet of the oil return pipe is connected with the oil tank. According to the table, most of the hydraulic oil in the testing process is supplied by the energy accumulator, so that the motor capacity is greatly reduced, and the problem of equipment noise is also completely solved.

The invention discloses a vacuum formation method of a lithium ion battery. In the method, an electrolyte injection process and a formation process of the battery are completed by adopting an integrated fixture with electrolyte-injecting and charging functions and a vacuum formation device with charging and vacuumizing functions. The vacuum formation device charges the battery arranged in the integrated fixture, and the battery is electrically connected with the vacuum formation device by the integrated fixture. The vacuum formation method of the invention provides an enclosed and controllable microenvironment, thereby reducing electrolyte waste, avoiding overflow loss of electrolyte and corrosion on a battery casing, the fixture or charging equipment, and effectively reducing environmental pollution.

The invention relates to a laser splicing welding method for a galvanized steel sheet. The laser splicing welding method is characterized by comprising the following steps: step 1, base metal is provided and located; step 2, a laser welding system is provided; step 3, the laser welding system is started up, a protective gas sprayer nozzle blows a protective gas, and a laser beam transmitted by a laser welding head is perpendicularly irradiated onto the upper surface of a workpiece; step 5, a temperature sensor acquires the temperature of the back side of the base metal in real time, and the laser welding head and a high-pressure gas column nozzle are rotated when the acquired temperature reaches or exceeds the gasification temperature value of the base metal to ensure that the laser welding head is inclined relative to the upper surface of the workpiece and the high-pressure gas column nozzle is perpendicularly aligned with the upper surface of the workpiece; step 6, a gas supply valve of the high-pressure gas column nozzle is controlled to ensure that inert gas columns jetted by the high-pressure gas column nozzle penetrate welding pores and the laser welding head continues to perform welding; and step 7, the welding process is finished. The high-pressure tiny gas column assist in maintaining the pores, so that the stability of the welding pores and a weld pool is improved.

The invention relates to a method for laser deep penetration-brazing connection of a dissimilar material. The method comprises the steps that a laser welding head, a high-pressure gas column nozzle and a protective gas spray pipe can move relative to a base material, when the backside temperature of the base material reaches or exceeds the gasification temperature value of the base material, the laser welding head and the high-pressure gas column nozzle are rotated, the laser welding head is made to incline relative to the upper surface of a workpiece, the high-pressure gas column nozzle is vertically aligned with the upper surface of the workpiece, a high-pressure gas column nozzle gas supply valve is controlled, and an inert gas column sprayed by the high-pressure gas column nozzle penetrates a small welding hole. According to the method for laser deep penetration-brazing connection of the dissimilar material, the high-pressure tiny gas column is used for assisting in maintaining the small hole, uniform distribution of laser energy in the depth direction of the small welding hole is optimized, it is avoided that the laser energy overflows and is lost, and groove-free laser deep penetration-brazing connection of the dissimilar material is achieved.

The invention relates to the field of quadruped robot hydraulic systems, and discloses a quadruped robot hydraulic system based on two-stage energy supply and load port independent valve control, including a hydraulic two-stage oil source unit, and a first hydraulic system based on load port independent valve control. The hydraulic drive unit and the second hydraulic drive unit, the first hydraulic drive unit and the second hydraulic drive unit are connected to the hydraulic two-stage oil source unit through a high pressure bus, a low pressure bus and an oil return bus. Through the design of the hydraulic two-stage oil source unit and the first hydraulic drive unit and the second hydraulic drive unit based on the independent valve control of the load port located at the two stages, two kinds of pressure are used for energy supply, and the pressure switching is realized through the pressure switching valve, so that the hydraulic drive During the working process of the unit, the outlet throttling is ensured while the inlet throttle valve is in a state of large opening, so that the efficiency of the hydraulic drive unit can be improved, thereby reducing the energy consumption of the hydraulic drive unit and improving the efficiency.