47results about How to "Large axial load" patented technology

A guide device for guiding a variable-pitch blade, in particular in a turbomachine compressor, the blade having a pivot formed by a cylindrical axial shank mounted in a cylindrical housing of a casing and pivotally guided about an axis in said housing by bearings, where the bearings are abutment bearings with conical rollers, the axes of the rollers being substantially perpendicular to the pivot axis of the blade.

The invention provides a clamp-driven integrated type piezoelectric-drive high-precision rotary actuator and method thereof. The actuator comprises an actuator pedestal, a lower thrust ball bearing being installed at the pedestal and being capable of bearing an axial load, a lower drive structure arranged above the pedestal, an upper drive structure connected with the lower drive structure 3 into one, an output shaft being capable of being clamped and limited by the lower drive structure and the upper drive structure after installation, an upper thrust ball bearing installed above the output shaft, and a top cover installed above the thrust ball bearing. In addition, the invention also discloses an actuating method for the actuator. Piezoelectric ceramic units are driven according to a certain order to realize bidirectional large-angle rotation driving. The upper drive structure and the lower drive structure have completely identical geometric dimensions; and with slow feeding, one-time processing moulding is realized, the processing and assembling flow is simplified, and the implementation is high. Moreover, the actuator employs the piezoelectric ceramic units as driving elements. The actuator has characteristics of large output stroke, high output resolution, and power-off self-locking.

The invention discloses an integral shaft-connect type fan clutch bearing. The bearing adopts a row of rollers and double-row steel balls, the double-row steel balls adopt an angular contact structure in a geometric form, the bearing comprises a bearing outer ring, a mandrel, a steel ball holder, a roller holder and a seal ring, wherein channels and a raceway are machined on the bearing outer ring and used for bearing the rolling elements and guiding the rotation of rolling elements, the rolling elements comprise the steel balls and the cylindrical rollers, the mandrel is inserted into the bearing outer ring in the axial direction, inner channels are machined on the outer diameter of the mandrel and used for bearing the steel balls and guiding the rotation of the steel balls, an inner raceway is further machined on the outer diameter of the mandrel and used for bearing the cylindrical rollers, the steel ball holder is arranged between the bearing outer ring and the mandrel and makes the steel balls distributed in the channels at equal intervals, the roller holder adopts a design of a cylinder-shaped structure and a spring collar structure, a spring collar is assembled on the bearing outer ring in a matched mode to prevent the cylindrical rollers from springing out in the axial direction, and the sealing ring is installed in a seal groove formed in the end of the bearing outer ring in a pressed mode and remains still with the bearing outer ring.

The invention relates to a bearing device of a direct current vertical motor, which comprises a rotating shaft, a bearing outer cover, a bearing sleeve, a bearing group and a bearing inner cover; the bearing sleeve is supported and assembled on to the rotating shaft through the bearing group; the bearing inner cover is assembled on the inner side of the bearing group in a sealing way, and the bearing outer cover is assembled on the outer side of the bearing group in a sealing way. The bearing device of the direct current vertical motor is characterized in that: the bearing group mainly comprises two single row angular contact bearings which are arranged back to back. The bearing device of the direct current vertical motor has a simple and reasonable structure, good sealing performance, high reliability and low manufacturing cost, can bear quite large axial load in an upward direction and a downward direction when the safety and the reliability of the motor are ensured, has higher rigidity, can meet the use requirements of the vertical motor, and has an obvious effect.

In this double-row self-aligning roller bearing (1), rollers (4, 5) are interposed, between an inner race (2) and an outer race (3), in two rows beside each other in the axial width direction of the bearing, a raceway surface (3a) of the outer race (3) is spherical, and the outer peripheral surfaces of the two rows of rollers (4, 5) have a cross-sectional shape that conforms to the raceway surface(3a) of the outer race (3). The two rows of rollers (4, 5) have different lengths (L1, L2) and the length (L1) of the long roller (5) is at least 39% of the bearing width (B). The ratio of the contact angle (theta1) of the short roller (4) to the contact angle (theta2) of the long roller (5) is within the range 1:2 to 1:4. Thus, the present invention can simultaneously receive both axial load andradial load, can be used in applications in which loads of different sizes act on two rows of rollers beside each other in the axial direction, and makes it possible to sufficiently increase, withinthe constraints of boundary dimensions, the load capacity of the roller in the row that receives the axial load.

A rigid endoscope includes an outer housing subassembly that supports an optics subassembly. The outer housing subassembly includes concentric tubes with optical fiber for providing object illumination. The optics subassembly includes a tubular sheath sealed at both ends for carrying lenses and other optical elements. First and second positioners associated with the optics subassembly and the outer housing subassembly, respectively, limit the transfer of axial forces from the proximal end of the endoscope to the tubular sheath.

The invention provides a magnetic suspension bearing, a motor, a compressor and an air conditioner. The magnetic suspension bearing comprises an axial magnetic field control part, a radial magnetic field control part and a rotor assembly, the rotor assembly comprises a rotor iron core, the axial magnetic field control part comprises an axial control end opposite to the end face of the rotor iron core, the axial control end is provided with an axial control winding, each radial magnetic field control part comprises a radial control end arranged opposite to the peripheral surface of the rotor iron core, each radial control end is provided with a radial control winding, permanent magnets are arranged between the axial magnetic field control parts at the two ends and the radial magnetic field control parts respectively, the permanent magnets provide bias magnetic fields for the axial magnetic field control parts at the ends where the permanent magnets are located, the permanent magnets at the two ends jointly provide the bias magnetic field for the radial magnetic field control part. According to the magnetic suspension bearing, front and rear axial control magnetic fields can be mutually independent and do not interfere with each other, front and rear axial control systems are independent, the control logic is simplified, and the system stability is improved.

The invention relates to a ball screw performance testing testbed based on motor servo loading. Rolling guide rails are arranged on a bed body, a movable pair is formed by the rolling guide rails and guide rail sliding blocks, the guide rail sliding blocks are fixedly connected with a workbench, a load ball screw pair is arranged in a middle groove in the bed body, a load nut seat is fixedly connected with the workbench, linear motor permanent magnet guide rails are arranged in outer inner grooves symmetrically formed in the bed body, a movable pair is formed by the linear motor permanent magnet guide rails and linear motor sliding blocks, and the linear motor sliding blocks are fixedly connected with the workbench. The ball screw performance testing testbed can simulate static or dynamic loads through a rotary servo motor or a linear servo motor, meanwhile, the locating precision, repeated locating precision, reverse errors, temperature rise and friction torque of the load ball screw pair are examined, the feasibility of the ball screw performance testing testbed in practical work is verified, the testbed has the advantages of being flexible in loading mode, high in loading precision and stable in loading process, and load lead screws of different lengths and the identical specification can be used for tests on the same performance testbed.

The pedal bearing unit has a pedal bearing axle (3) connected to the pedal cranks (4,5) and housed rotatable in a housing (2) through two spaced rolling bearings formed as axial inclined needle bearings (8,9) whose bearing needles (8.5, 9.5) have rotary axles (8.7, 9.7) which roll at an angle inclined to a bearing axle on associated tracks between two flat metal washer disc (8.1,8.2, 9.1,9.2). The inclined needle bearings are tensioned against one another through conical contact bearing faces (2.1, 10.1, 11.1) The flat washer discs are made through chipless shaping and subjected to a hardening process.

The invention discloses a double-outer-ring full ball bearing. The double-outer-ring full ball bearing comprises an inner ring, a first outer ring and a ball, wherein rolling channels are correspondingly formed in the inner ring and the first outer ring. The double-outer-ring full ball bearing is characterized in that the first outer ring is composed of two symmetricalhalf outer rings; the two half outer rings are clamped through a second outer ring; sealing grooves are formed in the corresponding positions of the inner ring and the first outer ring, and rubber sealing rings are arranged in the sealing grooves in a matching manner; retainer rings are tightly clamped on the outer sides of the rubber sealing rings and between the second outer ring and the first outer ring; and the inner sides of the retainer rings are stuck with second rubber rings which are matched with the rubber sealing rings in an abutting manner; and sealing lips, which are in abutting contact with the first outer ring and the inner ring, are arranged on the inner sides of the rubber sealing rings.

The invention discloses an integral shaft-connect type fan clutch bearing. The bearing adopts a row of rollers and double-row steel balls, the double-row steel balls adopt an angular contact structure in a geometric form, the bearing comprises a bearing outer ring, a mandrel, a steel ball holder, a roller holder and a seal ring, wherein channels and a raceway are machined on the bearing outer ring and used for bearing the rolling elements and guiding the rotation of rolling elements, the rolling elements comprise the steel balls and the cylindrical rollers, the mandrel is inserted into the bearing outer ring in the axial direction, inner channels are machined on the outer diameter of the mandrel and used for bearing the steel balls and guiding the rotation of the steel balls, an inner raceway is further machined on the outer diameter of the mandrel and used for bearing the cylindrical rollers, the steel ball holder is arranged between the bearing outer ring and the mandrel and makes the steel balls distributed in the channels at equal intervals, the roller holder adopts a design of a cylinder-shaped structure and a spring collar structure, a spring collar is assembled on the bearing outer ring in a matched mode to prevent the cylindrical rollers from springing out in the axial direction, and the sealing ring is installed in a seal groove formed in the end of the bearing outer ring in a pressed mode and remains still with the bearing outer ring.

The invention discloses a water-lubricated thrust bearing assembly. The assembly comprises a thrust disc and a stainless steel thrust disc, wherein the thrust disc comprises a hard metal substrate, the annular end surface of the metal substrate at the contact sides of the thrust disc sector-ring shaped friction blocks is covered with a non-metal wear-resisting layer, the stainless steel thrust disc comprises a stainless steel annular substrate and a plurality of sector-ring shaped friction blocks on one side of the annular substrate, a lubrication water channel is formed between the adjacent sector-ring shaped friction blocks, the corresponding number of the stainless steel sector-ring shaped support blocks with the sector-ring shaped friction blocks are arranged on the other side of the annular substrate, a cool water channel is formed between the adjacent sector-ring shaped support blocks, the sector-ring shaped support blocks and the sector-ring shaped friction blocks are arranged in the circumferential direction in the staggered way, the symmetry axis of the sector-ring shaped support block coincides with the projection of the middle line of the lubrication water channel in the annular end surface of the substrate. The water-lubricated thrust bearing assembly has features of great axial bearing capacity, good cooling effect, great wear resisting capacity, high corrosion resistance, low operation resistance, and long service life.

The invention provides an air quenching method and device suitable for engine pistons. The method includes the following steps: Step 1: Clamp the engine piston to be quenched between upper and lower clamping rods, and the clamping rods respectively include clamping rods. Hold the head and bearing; Step 2: Set up a compressed air nozzle that is eccentric to the left and right of the axis of the engine piston around the engine piston, and spray compressed air to the engine piston through the compressed air nozzle, so that the engine piston will revolve around its own axis under the action of compressed air Rotary, where the engine piston is cast from aluminum alloy or aluminum matrix composite. The present invention utilizes the compressed air generally available at the production site as the air source for the air quenching of the engine piston. The high-speed airflow formed by the compressed air ejected from the nozzle in the compressed state itself has the cooling effect of expanding and absorbing heat. At the same time, the high flow rate can Takes heat away quickly.

The invention discloses a turbocharger, comprising a turbine housing, a turbine, a rotary shaft, a radial thrust bearing and an axial thrust bearing, an impeller and an impeller housing, wherein the turbine is arranged in the turbine housing; the rotary shaft is connected with the turbine; each of the radial thrust bearing and the axial thrust bearing sleeves the rotary shaft; the impeller is connected with the other end of the rotary shaft; the radial thrust bearing is an air dynamic pressure foil radial thrust bearing; the axial thrust bearing is an air static pressure axial thrust bearing. The turbocharger has the advantages that a turbocharger rotor system is supported by a combined structure of the air static pressure axial thrust bearing and the air dynamic pressure foil radial thrust bearing, so that the effects of no lubricating oil, high efficiency, high rotation speed and the like are achieved; the air static pressure axial thrust bearing can bear great axial load; two types of gas differing in medium and respectively positioned at a turbine end and an impeller end can be isolated by a high-pressure air film formed by the air static pressure axial thrust bearing; meanwhile, the air dynamic pressure foil radial thrust bearing can be adapted to a high temperature environment, and no cooling device is needed in the turbocharger.

A caster structure has a screw hole formed at the middle of a carrying plate and provided for passing, screwing, and pressing a screw, and then screwing and pressing tightly with a nut, so that the installed screw has a smaller thickness to lower the center of gravity of an installed wheel in addition to giving a dual nut fixing effect. The caster has bearings which are mainly thrust bearings for bearing a relatively larger axial gravity to prevent the bearing from being damaged by gravity and the balls from falling out. The bearings are limited and positioned securely to prevent installation gaps and dusts, to maintain a flexible rotation of the caster.

The present invention relates to a bearing device. The present invention comprises a bearing seat (1) and at least a bearings (2 and 3), the bearing is fixed by the bearing seat (1), the bearing seat (1) has at least a round gas (4), and under the installation state of the bearings (2 and 3), the gap surrounds the periphery extension of at least bearing rings (5 and 6) of the bearings (2 and 3). In order to simplify the installation of the bearing device, according to the present invention, the bearing seat (1) forms at least two parts (1 and <1>), wherein one part (1) of the bearing seat (1)is formed to enable the gap (4) of the bearing rings (5 and 6) of at least the bearings (2 and 3) to be extended more than 180 degrees of the periphery, and at least two parts (1 and <1>) of the bearing seat (1) are durably and mutually connected.

The invention discloses a gas static pressure bearing with a floating thrust surface. The gas static pressure bearing comprises a bearing body, a bearing lining, a floating thrust surface body and an elastic plate, wherein the bearing body sleeves the bearing lining; one end of the bearing body is connected with one end of the elastic plate in a sealing manner; the other end of the elastic plate is connected with the floating thrust surface body in the sealing manner; the elastic plate and the floating thrust body are connected with one end, in the axial direction, of the bearing body in sequence; a plurality of gas holes which are communicated in a matched manner are formed in the bearing body, the elastic plate and the floating thrust body; the elastic plate is made of an elastic material. According to the technical scheme, the thrust surface is changed to be in a floating type structure, so that a gas film clearance between the gas bearing and a shaft body is uniform, eccentric force of the bearing is reduced, and the axial bearing capacity of the gas bearing is greatly improved; and therefore, the gas bearing can be used for bearing a high axial load and achieving the high flow and the high rotating speed.