52results about How to "Achieve a soft landing" patented technology

The invention provides an impact resisting check valve. The impact resisting check valve is composed of a valve body, a valve seat, a valve clack, an elastic piece and a valve cover. The valve clack is arranged on the valve seat in a vertical moving mode. The elastic piece is arranged on the valve clack in a sleeving mode to make the valve clack have the tendency of being closed to the valve seat. A guide sleeve and a fixing plug are fixedly arranged above a middle cavity of the valve body. The fixing plug is located in the middle of the guide sleeve and extends downwards. The upper portion of the valve clack is arranged in the guide sleeve in a vertical sliding fit mode. A receding space is arranged above the valve clack and located on the guide sleeve. A piston hole for the fixing plug to be inserted therein is formed in the valve clack. A through hole communicated with the middle cavity is formed in the bottom of the side wall of the piston hole. A buffering structure hole communicated with the piston hole and the middle cavity is formed above the through hole. The buffering structure hole vertically extends in the length direction of the buffering structure hole. The buffering structure hole is provided with an upper section and a lower section which are communicated. The moving speed of the valve clack is controlled through the relative position relation of the fixing plug and the buffering structure hole. Impact force produced between the valve clack and the valve seat when the valve clack is closed is prevented, and therefore the service life of the valve is prolonged.

The invention relates to a vehicle body correcting machine and a control system mounted on a base of the correcting machine, the vehicle body correcting machine comprises a lifting mechanism and a drawing tower, and a front position-limiting pile and a rear position-limiting pile are respectively fixedly mounted on the base of the lifting mechanism. The vehicle body correcting machine further comprises a locking arm for locking the drawing tower on the lifting mechanism, the locking arm is connected with an upper frame which is fixedly mounted on a tower column through a second articulated shaft at the middle part of the locking arm, and the front end of the locking arm is connected with a floating locking head through a first articulated shaft. The upper end of a locking oil cylinder is connected with the rear end of the locking arm through a third articulated shaft. A locking mechanism comprises two rolling wheels for matching with a platform track, the rolling wheels are connected with a revolution shaft through rotation shafts, the revolution shaft is mounted on a cross arm of the drawing tower and a directional wheel is further mounted on the revolution shaft. The control system is mounted on the correcting machine, the vehicle body correcting machine integrates parallel lifting and oblique lifting of a platform, locking of the drawing tower and the functions of the drawing tower into a whole and is controlled by virtue of remote control keys, and thus the automatic and continuous correction operation is further realized.

The invention relates to a mars soft landing guidance method, in particular to a mars probe landing guidance method based on fuel minimization, and belongs to the technical field of deep space exploration. The mars probe landing guidance method based on fuel minimization solves the problems that fuel minimization guidance can not be achieved through an existing explicit guidance law, and the optimal guidance law must store an entire track, so that a large storage space is occupied. The technical scheme includes the steps that a fuel optimal solution of a probe is acquired; path points are set and a path point library is established; a linear feedback guidance law is designed, if initial state information of the probe is matched with path point information of the path point library, landing is executed, and otherwise, landing is executed after the path points are fitted. Through the guidance strategy of the path points and the linear guidance law, the method can achieve the fuel optimal guidance of a power descent section of the mars probe based on a small storage space. The mars probe landing guidance method based on fuel minimization is suitable for the guidance law of the power descent section of the mars probe.

A laser cladding method for preparing a high-quality nickel-based alloy coating on the surface of titanium metal is characterized in that it consists of two steps of prefabrication of a mixed powder compacted sheet and laser cladding treatment. The prefabrication of the mixed powder compacted tablet means that the nickel-based self-fluxing alloy powder and the lanthanum oxide powder are firstly mixed uniformly by a ball mill, then dried, and finally pressed into a tablet on a press. The laser cladding treatment refers to placing the pressed sheet on the cleaned titanium surface, and then performing laser cladding processing. By adding lanthanum oxide (La2O3), the invention improves the absorption performance of the nickel-based coating powder on laser heat, and improves the interface fusion performance of the coating and the substrate. The cladding process of the present invention has excellent performance, dense coating structure, good interface bonding, and the hardness of the transition zone between the coating and the substrate changes continuously in a gradient, realizing a "soft landing" from the coating to the substrate, and the hardness of the coating is HV642.86 higher than that of the substrate The hardness HV350 is significantly improved.

The invention discloses an automatic receiving and transferring device for a pneumatic material conveying system. The automatic receiving and transferring device is connected to a pneumatic conveying pipeline unit used for conveying objects to be conveyed and comprises a cabinet body, and a receiving and transferring pipeline, a supporting and lifting platform unit and a manipulator unit are arranged inside the cabinet body; the upper end of the receiving and transferring pipeline is used for communicating with the pneumatic conveying pipeline unit; the supporting and lifting platform unit is matched with the receiving and transferring pipeline, does lifting motion below the receiving and transferring pipeline and is used for lifting the objects to be conveyed upwards, conveying the objects to be conveyed into the receiving and transferring pipeline for pneumatic conveyance and used for falling down after receiving the objects to be conveyed from the receiving and transferring pipeline; and the manipulator unit is arranged on one side of the lifting platform unit and is used for placing the objects to be conveyed from the exterior of the cabinet body on the lifting platform unit for lifting the objects and conveying the objects pneumatically and used for placing the objects to be conveyed on the lifting platform unit outside the cabinet body. The automatic receiving and transferring device has the advantages that the structure is simple and compact and the automation degree is high.

The invention discloses a buffering device used for a pneumatic material conveying system. The buffering device is arranged at one end of a pneumatic conveying pipeline, and comprises a buffering gas providing assembly and an air supply pipeline; the buffering gas providing assembly communicates with the pneumatic conveying pipeline through the air supply pipeline; and when conveyed objects are conveyed from the pneumatic conveying pipeline, the buffering gas providing assembly blows air into the pneumatic conveying pipeline through the air supply pipeline so that air pressure can be formed at one end of the pneumatic conveying pipeline and used for buffering the conveyed objects. The buffering device used for the pneumatic material conveying system has the advantages of being simple and compact in structure and good in buffering effect.

The invention relates to a conveyor with large torque output. The conveyor comprises a transmission rack which is erected upwards obliquely, a conveyer belt, a drive roller, a driven roller and a supporting roller, and is characterized in that the drive roller is connected to a second-level reduction gear which comprises a transmission motor, small belt pulleys A, B, big belt pulleys A, B and an intermediate shaft; the output shaft of the transmission motor is fixed with the small belt pulley A through a hinge pin; the small belt pulley A is connected with the big belt pulley A through a belt; the big belt pulley A is arranged on one end of the intermediate shaft through a hinge pin; the small belt pulley B is arranged on the other end of the intermediate shaft through a hinge pin, and is connected with the big belt pulley B through a belt; the big belt pulley B is directly fixed on a shaft of the drive roller through a hinge pin. The conveyor with large torque output has an ideal speed reducing effect, and the technical problem that the manufacturing cost of the traditional belt conveyor is high is solved.

An integrated device for conveying printed circuit board semi-finished products and bulkhead feeding includes a set of conveying rollers, a pair of adjustable guide assemblies, a pair of spaced limit support assemblies, a bulkhead storage rack, a bulkhead grabbing mechanism, a Partition boards set at intervals receive components. The limit support assembly includes a row of limit support columns arranged at intervals. Each limit support column is respectively arranged in the gap between two adjacent roller bodies of the conveying roller group. The bottom ends of a row of limit support columns are all connected to the same connection. The connecting plate is connected to a pair of movable ends of the first lifting cylinder, the first lifting cylinder is arranged on a base, and the base is arranged on the moving end of the first transverse linear mechanism. Realize the alignment and limit of the conveyance of printed circuit boards of different sizes, ensure that the printed circuit boards can be turned over normally when they are conveyed to the turning area, and the printed circuit boards are fed on the partition during the conveyance, so that after turning over There are partitions between the stacked printed circuit boards to protect the metal circuits on both sides of the semi-finished product.