32results about How to "Eliminate bounce" patented technology

The invention provides a bounce-free plug-in type vacuum arc-extinguishing chamber. The bounce-free plug-in type vacuum arc-extinguishing chamber comprises a static contact, the static contact is provided with a contact portion used for plugging conduction with the outer peripheral face of a moving contact, the static contact is internally provided with a buffer contact used for contact cooperation with the end surface of the moving contact through elastic components. The bounce-free plug-in type vacuum arc-extinguishing chamber has the following advantages: the static contact is internally provided with the buffer contact used for contact cooperation with the end surface of the moving contact through the elastic components, such that when the moving contact is in plugging fit with the static contact, the end surface of the moving contact is in contact with the buffer contact, when the moving contact moves, under the effect of the elastic components, the buffer contact moves along with the moving contact, the elastic components are compressed, in such a process, kinetic energy of the moving contact is absorbed by the buffer contact and the elastic components, bounce of the moving contact is eliminated through proper design of the buffer contact and the elastic components, and the problem of easy wear caused to the outer peripheral face of the moving contact in a bounce process is also solved.

The invention discloses a seed guide device and a seeding monomer with the same. The seeding monomer comprises a rack, power and transmission devices, a covering device, a ditching device and a seeding system, which are arranged on the rack; the power and transmission devices are connected with the seeding system; the seeding system comprises a seed box, a seeding apparatus and a seed guide device; the seed box is arranged above the rack; the seeding apparatus is arranged below the seed box and connected with a seed charge port of the seed box; the seed guide device is arranged below the seeding apparatus; the seed guide device comprises a seed pipe, a seed guide mechanism and a transmission mechanism; the seed pipe is of a closed barrel structure; openings are respectively formed in the upper end and the lower end of the seed pipe; the seed pipe comprises a linear control section and a curve seed guide section, which are sequentially connected; the opening at the upper end of the seed pipe is formed in the linear control section correspondingly to the seed charge port of the seeding apparatus; the direction of the opening at the lower end of the seed pipe is reverse to the advancing direction of a seeder; and the seed guide mechanism is arranged inside the seed pipe correspondingly to the seed charge port and connected with the transmission mechanism.

A hydraulic system and a method of actively damping oscillations during actuation of a hydraulic cylinder in a hydraulic system is disclosed. The hydraulic cylinder is actuated by energizing a motor that rotatably drives a pump. The pump supplies a fluid to the hydraulic cylinder to actuate the cylinder. A pressure of the fluid is sensed during actuation of the hydraulic cylinder. A rotational speed of the motor is varied in response to the sensed pressure of the fluid. This varying of the rotational speed of the motor actively damps pressure oscillations during actuation of the hydraulic cylinder.

The invention discloses a method and a protection device for reducing object impulsion, and relates to the field of object collision protection technology. The method and the device are characterized in that: when an external force is exerted on an object, a liquid-filled main cavity of the protection device positioned on the stressed surface of the object is exerted by the external force and a preset value is reached, films of different levels break in a passive or active manner to make the fluid flows into a vacuum cavity arranged around the main cavity; the external force exerted on the object is dispersed and the collision rebound is eliminated by the flowing of the fluid, thereby achieving the purpose of effectively preventing damages on the object to be protected. The brand new protection method and the protection device have wide application prospect.

The invention relates to a beam of a steel plate straightener, and belongs to the technical field of steel strip straighteners. The beam is characterized in that the upper surfaces of the left end and the right end of an upper beam are fixedly and integrally connected with a left support and a right support respectively in a welding manner, a sensor and a hydraulic cylinder are mounted between the left support and the right support, the sensor is electrically connected with a tension PID (proportion integration differentiation) controller, the hydraulic cylinder is controlled by the tension PID controller, and the bottom end of the hydraulic cylinder and the top end of a piston rod are hinged to the left support and the right support respectively. The structure of a lower beam is as same as that of the upper beam, and the mounting direction of the lower beam is opposite to that of the upper beam. The beam has the advantages that flexible deformation of the upper beam and the lower beam in loading can be eliminated, and bounce in change of working load can also be eliminated.

The invention discloses a method and a device for vibration reduction of an arm support. The method comprises the following steps that a pressure value P required by each cavity of an oil cylinder iscalculated in real time when the arm support is in static balance in a current position state and under a load; when the set conditions that a variable-amplitude oil cylinder electromagnetically controls a reversing valve to be in a closed state and the oil pressure of the variable-amplitude oil cylinder is greater than P1 are simultaneously met, an electro-hydraulic proportional pressure overflowvalve is opened, the opening pressure of the overflow valve is synchronously set as P1; when the oil pressure of the variable-amplitude oil cylinder is stable and smaller than or equal to P1, the electro-hydraulic proportional pressure overflow valve is closed, the overflow valve is used as a stop valve, the vibration reduction process is finished; and the device at least comprises a lifting armsupport and the variable-amplitude oil cylinder, the variable-amplitude oil cylinder is a hydraulic oil cylinder, one end of the variable-amplitude oil cylinder is connected with the arm support, a balance valve is arranged on the variable-amplitude oil cylinder, and overflow valves are arranged on a rod cavity and a rodless cavity of the variable-amplitude oil cylinder correspondingly. The methodand the device for vibration reduction of the arm support are suitable for vibration reduction when the arm support stops suddenly in various working states.

The invention relates to an assembly method of a stainless steel tube shell and a capillary core in a loop heat pipe evaporator. By adopting a specially designed preparation tool and optimizing the heating temperature, heating time, assembly time and cooling mode in the assembly process, The precision interference fit between the stainless steel tube shell and the capillary core has been realized, and the steel pipe fixing seat of the assembly tool is provided with a vent hole, which can release the compressed air generated in the stainless steel tube shell when the capillary core is loaded into the stainless steel tube shell, ensuring that the capillary core It can be assembled in place; there is a "V"-shaped buffer part in the stainless steel tube shell to absorb the impact force generated during the capillary core's descent and eliminate the rebound of the capillary core; the guide part of the assembly tool is tapered, which can ensure the smooth installation of the capillary core Into the stainless steel tube shell, and can vertically drop into the stainless steel tube shell, the present invention improves the reliability of the capillary core through the above-mentioned assembly tooling and assembly method, and greatly improves the assembly quality of the loop heat pipe evaporator.

The invention discloses high speed wire package type neatening equipment including a finishing mill, a pinch roll, a spinning machine and a plurality of first cooling roll tables which are arranged successively. The first cooling roll tables are located below an exit of the spinning machine, a bending guide is arranged between the pinch roll and the spinning machine, the upper wall of an inner hole of the bending guide is in an arc shape, the spinning machine is provided with a deviation guiding plate and a spinning pipe arranged successively, a flow guiding groove is formed between the deviation guiding plate and the spinning pipe, one end of the spinning pipe is located in the flow guiding groove, the upper wall of an inner hole of the flow guiding groove is in an arc shape, a split plate is arranged on the outer side of the deviation guiding plate, a gap is arranged between the deviation guiding plate and the split plate, and a left carrying plate, a lower carrying plate and a rightcarrying plate are arranged on the lower half position in the split plate. The bending guide and the flow guiding groove make high speed wires move directionally and an only wire channel is formed inthe process of the spinning machine, the arrangement of the left carrying plate, the lower carrying plate and the right carrying plate can improve the stability of the falling of the high speed wires, the height of a first section of the first cooling roll table is adjusted, and bounce generated in the falling of coils can be eliminated, so that the problem that a high speed wire package type isprone to generate floating silk can be solved.

The present invention not only eliminates bouncing of a rod material during cutting but also makes replacement of a stationary blade and a pressing member and cleaning work of the stationary blade and the surrounding of the pressing member easy. A pressing member-side inclined surface (65) of a pressing member (6) is pressed downward by a clamp block-side inclined surface (542) of a clamp block (54), thereby press-clamping a rod material (13) with a pressing section (621) of a pressing bushing (62). The clamp block-side inclined surface (542) and pressing member-side inclined surface (65) are formed so as to have an inclination angle (Theta) of six degrees. Because this inclination angle (Theta) is set to an angle at which a component force of the pressing force becomes smaller than the maximum frictional force generated between the pressing member-side inclined surface (65) and clamp block-side inclined surface (542), the clamp block (54) and a piston rod (551) do not move back leftward (in the unclamping direction) even when a large reaction force has acted upon the pressing member (6) during the cutting of the rod material (13). Bouncing of the rod material (13) during the cutting is eliminated, thereby enabling manufacturing of stable billets with improved cutting precision.

The invention relates to a composite electrical contact, and belongs to the technical field of power switch equipment. The composite electric contact comprises a contact piece, at least one middle cupbase and a tail cup base which are arranged in sequence, elastic supporting structures are arranged in inner cavities of the middle cup base and the tail cup base, each elastic supporting structure comprises a positioning backing ring, and the positioning backing rings sequentially penetrate through a dish-shaped gasket and a supporting gasket. The supporting gasket is arranged on the lower surfaces of the contact blade and the middle cup base, the positioning backing ring is arranged on the upper surfaces of the middle cup base and the tail cup base, and a stop gap is reserved between the upper surface of the positioning backing ring and the lower surfaces of the contact blade and the middle cup base. Impact force of the contact during closing of the quick switch can be absorbed througha buffering effect, and closing bounce of the contact is eliminated.

The invention discloses an earthquake-resistant economic caisson wharf and a construction method thereof. The caisson wharf comprises a vibration isolation foundation, a caisson main body, a superstructure, a pressure reducing fill body, a pressure reducing backfill body and a concrete slab. The vibration isolation foundation is provided with the caisson main body, steel slag fragments are filled in the caisson main body, and the superstructure is arranged on the top of the caisson main body, the pressure reducing fill body is arranged on the side, near a shore, of the caisson main body, the pressure reducing backfill body is arranged between the pressure reducing fill body and undisturbed soil, the concrete slab is arranged above the pressure reducing backfill body, and the concrete slab is connected to the superstructure and the undisturbed soil respectively. The construction method includes the steps of the prefabrication of the caisson main body, the excavation of a foundation groove, the prefabrication of the vibration isolation foundation, the construction of the vibration isolation foundation, the transportation and installation of the caisson main body, the backfilling of the steel slag fragments of the caisson main body, the construction of the pressure reducing fill body, the construction of the pressure reducing backfill body, the construction of the concrete slab and the construction of the superstructure. The earthquake-resistant economic caisson wharf and construction method thereof reduces the engineering cost, has economic and environmental benefits, and solves the problems of sand and stone shortage day by day, and the recycling of waste steel slag fragments and waste tires.