4results about How to "Guaranteed high speed operation" patented technology

The invention relates to an assembly method of a dynamic balance test tool and the dynamic balance test tool thereof, and the assembly method of the dynamic balance test tool comprises the steps: machining an initial raw material to form a balance mandrel; wherein the outer diameter of the balance mandrel is gradually increased from one end to the other end, so that the two ends of the balance mandrel respectively form a small-diameter end and a large-diameter end; providing a to-be-tested part, wherein a through hole is formed in the to-be-tested part; the small-diameter end of the balance mandrel is inserted into the through hole, and the small-diameter end is in clearance fit with the through hole of the part to be tested, so that the balance mandrel is guided in without resistance; an insertion force F is continuously applied in the axial direction, so that the surface of the balance mandrel is attached to the part of the through hole, and axial displacement of the balance mandrel is stopped; and detecting the overall vibration amplitude of the balance mandrel and the to-be-tested part so as to verify the assembly stability and no additional unbalance between the balance mandrel and the to-be-tested part.

The present application relates to the field of fan, especially to Roots blower, pneumatic suction system and vehicle, comprising: shell and rotor; base, including base one and base two, front end cover, connected with base one, and form first cavity with base one, rear end cover, connected with base two, and form second cavity with base two, the rotor is internally provided with weight reduction cavity one and cavity two; the inside of base one and base two is provided with cooling channel for cooling. By setting base and end cover, forming first cavity and second cavity, and not communicating with rotor cavity, and setting cooling channel in base to cool the structure in each cavity, reducing the thermal expansion generated by each component when running at high speed, providing necessary guarantee for single machine operation still having high strength negative pressure; support assembly is respectively located at both ends of the rotor, improving the stability of the rotor, setting cavity one and cavity two on the rotor, which can realize the lightweight of the rotor, and ensure that the fan can run at high speed.

This application relates to the field of cooling systems for trackless rubber-tired vehicles in coal mines, and discloses a cooling system for such vehicles, including an oil tank, a drive motor, a dual hydraulic pump, a brake accumulator circuit, and a fan hydraulic motor. The dual hydraulic pump consists of a coaxially linked dual front pump and a dual rear pump. The redesigned cooling system of this invention uses dual hydraulic pumps to drive the dual front pumps to ensure vehicle braking power and the dual rear pumps to ensure the engine receives constant cooling. To achieve this, a portion of the oil in the brake main relief valve flows back to the oil tank, while another portion passes through a check valve and enters a transfer valve. The dual rear pumps, transfer valve, and fan hydraulic motor form an independent cooling hydraulic branch. These two branches are completely independent. This design ensures that while the braking system uses oil, the cooling fan driven by the fan hydraulic motor can also operate continuously at high speed, ensuring the stable operation of the vehicle's cooling system.

The utility model provides a kind of pin patch device, mechanism and workstation, solve the problem of low equipment utilization, low operating efficiency and increase production cost caused by using independent two equipment to complete pin operation and paste circuit board operation in prior art;Pin patch device includes: fixed plate;Pin assembly, pin assembly includes the pin vertical guide rail and pin driving part being set on fixed plate, pin mounting plate being slidably set on pin vertical guide rail, pin head and pin ejector structure being set on pin mounting plate, pin driving part is connected with pin mounting plate, drives pin mounting plate to slide along pin vertical guide rail vertically, pin ejector structure is used to push pin in pin head;Patch assembly, patch assembly includes the patch vertical guide rail and patch driving part being fixed on fixed plate, suction nozzle head being slidably set on patch vertical guide rail to adsorb circuit board, patch driving part drives suction nozzle head to slide along patch vertical guide rail vertically.