35results about How to "Reduce radial pressure" patented technology

A magnetic suspension combined ball bearing comprises an internal ring, an external ring and balls that are movably matched between the internal ring and the external ring; the internal ring and the external ring have the same central line; the ball consists of an upper ball cover, a lower ball cover, a through pipe and a movable magnetic pole; the upper ball cover is matched with an upper nozzleof the through pipe in an interference fit mode; the lower ball cover is matched with an lower nozzle of the through pipe in the interference fit mode; the movable magnetic pole is arranged in a cavity that is formed by the through pipe, the upper ball cover and the lower ball cover; the internal ring is provided with an internal fixed magnetic pole; and the external ring is provided with an external fixed magnetic pole. As the ball is internally provided with the movable magnetic pole, the internal ring is provided with the internal fixed magnetic pole and the external ring is provided with the external fixed magnetic pole, the balls bear the repulsion force of the internal fixed magnetic pole of the internal ring and the suction force of the external fixed magnetic pole of the external ring so that the balls are suspended on the internal ring between the internal ring and the external ring, the radial pressure of the balls on the internal ring is reduced, and the service life of thebearing is prolonged.

Method for producing a piston ring provided with a butt joint, in that an annular metallic main body is provided with at least one hard layer at least in the area of the outer circumferential surface of said main body, wherein after this coating the inner circumferential surface of the piston ring is at least partially subjected to a wall-thickness-reducing material removal process.

A convertible plunger is provided comprising an internal portion and a generally cylindrical exterior surface. At least a portion of the exterior surface is maintained in an initial expanded state by a property of the internal portion. The expanded state is reducible to a constricted state by an operation that is applied to the internal portion of the plunger to alter the property. A film coating may also be applied to a sidewall of the sleeve to reduce a sliding friction between the sleeve and barrel. A film coating may also be applied to a nose cone of the plunger to provide a barrier between the plunger and product in the barrel.

The invention relates to a bearing, in particular a chassis bearing for the rear axle of a motor vehicle, with an outer bearing sleeve, an inner bearing sleeve, at least one elastomer body arranged between the outer and inner bearing sleeves and two chambers which are arranged laterally opposite each other on the outer bearing sleeve. The chambers each have an adjusting element. The adjusting elements are displaceable. When subjected to pressure, the adjusting elements are displaced inwardly against the inner bearing sleeve. The adjusting elements can be clamped in their axial position by clamping rings which can be reduced in size radially, for example by means of air pressure. The inner bearing sleeve is thereby fixed and the rigidity of the bearing increased.

The invention provides a water-supply device of a rock drill. The water-supply device of the rock drill is positioned outside the rock drill and is installed on a bit shank of the rock drill. The water-supply device comprises a water-sealing device, a connecting sheath, and a drill rod with a central hole, wherein one end of the drill rod stretches into the connecting sheath and is fixedly connected with the connecting sheath; the water-sealing device is sleeved outside the connecting sheath and forms a rotary sealing fit with the connecting sheath; a water inlet is formed in the water-sealing device; and the water inlet is communicated with the central hole of the drill rod. The invention further provides a rock drill comprising the water-supply device. According to the technical scheme of the water-supply device, the water-sealing device is not limited in the radial direction so as to decrease the radial pressure from the connecting sheath, decrease the abrasion of the water-sealing device and prolong the service life; the water-sealing device is arranged outside the rock drill, so that the maintenance and the replacement are easily achieved and the cost is lowered; and the water-supply device is arranged outside, so that even if the water sealing device is worn, water cannot flow into the rock drill, and therefore emulsified hydraulic oil cannot be generated.

The invention discloses a method for improving large-specification electrically-upset end face concave and promoting grain refining, the sinking depth can be reduced, and grain refining can be promoted. The method comprises the following steps that rod material pretreatment is conducted; material reduction treatment is conducted on the edge areas on the two end faces of a rod material, and the contact area between the two end faces of the rod material, an anvil electrode and an upsetting cylinder can be reduced; the concave face type anvil electrode is adopted for conducting electric upsettingon the rod material on an electric upsetting device, pre-contact is provided for the peripheral face of a garlic head through the concave face type anvil electrode, plastic deformation happens to thepre-contact part, and accordingly sinking depth increasing is hindered; meanwhile, due to material reduction treatment, axial upsetting force is transmitted to the center of the garlic head in a centralized manner, and accordingly the concave of the end face of the garlic head is corrected; and along with improvement of the concave degree, garlic head grains are evenly refined.

The invention discloses a supporting and anchoring integrated resistance-limiting energy-consuming large-deformation tunnel primary supporting structure, and belongs to the field of tunnel construction. The primary supporting structure is composed of a steel grating and an anchor rod and damper integrated structure; the anchor rod and damper integrated structure comprises a resistance limiting steel plate and an anchor rod support; a damper is composed of an upper connecting plate, a lower connecting plate, stiffening ribs and the resistance limiting steel plate; an anchoring hole is reservedin the center of the resistance limiting steel plate; and the resistance limiting steel plate is arranged between the two connecting plates and is parallel to surrounding rock. The primary supportingstructure achieves active and passive combined supporting of a deeply-buried soft rock large-deformation tunnel, allows the generation of certain deformation amount of the surrounding rock, and releases radial and circumferential stress of the surrounding rock of the tunnel.

A system and method for an asymmetric K-ring is disclosed. The system and method is for forming a K-ring with the dynamic sealing surface (514) closer to one edge or face (506) of the k-ring than the other edge or face (504) . The asymmetrically placed dynamic sealing surface creates a larger bevel (510) on one side of the K-ring thereby reducing the sealing force produced by the K-ring when pressure is applied to the side of the K-ring with the larger bevel

The present invention discloses a bottle mouth crystallization heating method, which makes use of external heat energy. When a preform is mounted onto a plug finger of a base by the preform, a first heating source directly heats the external side of the bottle mouth to crystallize the bottle mouth, and a second heating source heats the plug finger of the preform being exposed from the bottom of the plug finger, so that after a heat absorber absorbs the heat, the heat absorber conducts heat energy to the plug finger. The plug finger with heat energy heats the internal side of the bottle mouth simultaneously, therefore to disperse heat energy evenly and rapidly to the internal and external sides of the bottle mouth for crystallization.

The invention belongs to the technical field of gear manufacture and specifically provides a forging technology of a single-oil-groove bevel gear. A gear rolling machine adopted in the forging technology comprises a machine frame; the top of the machine frame is fixedly connected with a horizontal sliding rail, and the horizontal sliding rail is in sliding connection with a worktable; the worktable is rotationally connected with a round rotary disk used for fixing a gear blank; one side of the machine frame is fixedly connected with a first sliding rail, and the first sliding rail is in sliding connection with a drive unit used for driving a rolling wheel to rotate and squeeze the circumference of the gear blank to form a tooth shape; a second sliding rail is arranged on the side, away from the rolling wheel, of the worktable and is in sliding connection with a supporting unit; and the supporting unit is fixedly connected with a support, the end, away from the supporting unit, of the support is rotationally connected with a supporting wheel, and a conic part is arranged at the end, away from the support, of the supporting wheel and matched with the shoulder on the outer edge of thegear. The shoulder on the outer edge of the gear is supported by the conic part, deformation of the gear blank in the tooth rolling process is reduced, and gear machining accuracy is improved.

Closure element for tightly closing a bore, the closure body of which closure element can be pressed into the bore with an oversize. In order to avoid damage to the bore, the closure body is designed as a hollow body. In this way, the closure body can deform slightly as the closure body is pressed into the bore and can thereby reduce the radial pressure on the wall of the borehole. At the same time, the weight of the closure element is reduced. The closure element is preferably a hollow sphere having uniform wall thickness.

The invention belongs to the technical field of automobile components, and provides a clutch master pump structure. The clutch master pump structure comprises a master pump push rod pushing a piston to move and a check ring installed at the end, close to the master pump push rod, of a cylinder. A conical groove is formed in the end, close to the piston, of the check ring. The master pump push rod comprises a push rod body and a ball head. The piston side of the ball head abuts against the piston. The check ring side is provided with a conical structure matched with the conical groove. The conical structure is inserted in the conical groove. The push rod body penetrates the check ring to be connected to the check ring side. The conical structure is arranged on the master pump push rod, the check ring is provided with the conical groove, and by means of the cooperation of conical surfaces, the master pump push rod is limited and is prevented from swinging; and thus the pressure and friction force between the piston and the cylinder are reduced, abrasion between the piston and the cylinder is reduced, the maser pump push rod moves more smoothly, and the performance of a clutch is guaranteed.

The invention relates to a water tap, and provides a rotary regulating-and-controlling-type water purification tap which is reasonable in structure, is low in cost, has a good axial positioning effect for a water outlet pipe, is smooth in rotation, and has a good seal performance and long service life, wherein the rotary regulating-and-controlling-type water purification tap comprises a tap body, a water purification pipe body, a rotary centering and a water outlet pipe, wherein the water purification pipe body is arranged on the water outlet of the tap body; the rotary centering is arranged on the water outlet of the water purification pipe body; one end of the water outlet pipe is provided with a rotary connector; the rotary connector is provided with O-shaped seal rings at intervals from top to bottom; the water outlet pipe can be arranged on the rotary centering in a rotation mode through the rotary connector on the water outlet pipe; an axial positioning device is also arranged between the rotary connector and the rotary centering; the axial positioning device comprises a clamping spring; an annular platform is formed in the rotary centering; a clamping spring groove is arranged on the part of the rotary connector positioned above the annular platform; and the clamping spring is arranged in the clamping spring groove of the rotary connector and is arranged on the annular platform of the rotary centering.

The invention provides an expansion sleeve type damping coupler. The expansion sleeve type damping coupler is formed by sequentially arranging a left expansion sleeve, a damping elastic set and a right expansion sleeve. The inner end face of the left expansion sleeve and the inner end face of the right expansion sleeve extend in the axial direction to form two or more metal claws respectively. The metal claws are evenly distributed along the circumferential positions of the end faces. An axial gap is formed between every two adjacent metal claws. The damping elastic set comprises a rigid intermediate body and two soft intermediate bodies, wherein the two soft intermediate bodies are located on the two sides of the rigid intermediate body. The soft intermediate bodies are provided with a plurality of soft grooves in the circumferential direction, wherein the shape of the soft grooves is the same as that of the metal claws. The rigid intermediate body is provided with a plurality of rigid grooves in the circumferential direction, wherein the shape of the rigid grooves is the same as that of the metal claws. The metal claws on the end face of the left expansion sleeve and the metal claws on the end face of the right expansion sleeve are all inserted into the grooves in the intermediate bodies. The expansion sleeve type damping coupler has the advantages that due to the design of the rigid intermediate body and the two soft intermediate bodies, the radial pressure on a mounting shaft is reduced to the maximum degree, the damping effect is obvious, and hazards caused by resonance are effectively restrained.

The invention relates to a double wrap spring and to a rotation device with the double wrap spring according to the invention, and to a system to be actuated. The double wrap spring (20) comprises aninner winding region (21) and an outer winding region (22), and also a transition region (23) mechanically connecting the inner winding region (21) to the outer winding region (22). In the non-installed state of the double wrap spring, the winding regions (21, 22) are arranged eccentrically with respect to each other. With the double wrap spring proposed here, elastic deformation of a transition region between the inner winding region and the outer winding region can be greatly restricted, and therefore energy input into the double wrap spring, the energy being input in the form of a torsionalmoment, is not absorbed by the transition region, but rather is substantially completely and immediately used for braking or blocking the components making contact with the double wrap spring.

The invention concerns an osteosynthesis screw (1) formed from a core (2) externally provided with a helical thread (3), said screw comprising a distal penetration portion and a proximal portion forming the head of the screw (6) and having a conical longitudinal section characterised in that the proximal portion comprises annular notches which are formed in the thickness of the core (2) and in the gaps between the threads of said proximal portion in such a way as to reduce the radial pressure during screwing.—Surgical device.

The invention relates to a generator set and a mobile charging vehicle and relates to the technical field of generator sets. The generator set comprises an engine and a generator. The engine comprisesa first shell and a first rotor shaft rotationally installed on the first shell. The generator comprises a second shell and a second rotor shaft which is in insertion fit with the second shell. The first rotor shaft is fixedly connected with the second rotor shaft and drives the second rotor shaft to rotate. The second shell is fixedly connected with the first shell. The second rotor shaft is rotationally connected to the second shell. The generator set relieves the technical problems that in the prior art, a generator set is large in volume, and connection precision between the engine and the generator is poor.