194results about How to "Avoid abnormal wear" patented technology

A power transmission device includes a pulley 1 and a hub 2 having an inner hub 21, a rubber damper 22 and an outer hub 23. A hub side engagement portion 24 formed of an elastic material and arranged either one, or both, of inner peripheral surface and outer peripheral surface of the outer hub engages with a pulley side engagement portion 12, arranged at a position corresponding to the outer hub, of the pulley in concavo-convex fitting to thereby constitute a torque transmission structure between the hub and the pulley. The hub side engagement portion and the pulley side engagement portion have a concavo-convex outer shape and mesh with each other.

A cage of a cylindrical roller bearing includes an annular section, a plurality of pillars that extend axially in an integrated, continuous manner from the inside surface of the annular section, and a plurality of pockets, which are formed between the inner circumferential direction side faces of adjacent pillars, and hold the cylindrical rollers in a freely rotatable manner. The circumferential direction side faces of the pillars incorporate a circular arc surface formed in both the inside and outside diameter directions from the pocket PCD which passes through the pocket center of the pocket, and a roll-off section (lubricant reservoir) provided at the tip end inner circumferential section.

The present invention relates to the cutting insert having a cutting edge which has a corner section that forms a convex arc shape when seen in a planar view from direction facing the rake face and a linear section that is in contact with the corner section at least at one end of the corner section and extends linearly. The cutting edge is provided with a first region along the corner section when seen in a planar a second region along the linear section and a third region between the first region and the second region. A rake angle of the cutting edge in the third region is made greater than rake angles of the cutting edges in the first region and the second region.

The present invention provides hybrid diesel fuels and methods for manufacturing hybrid diesel fuels. In embodiments, fuel compositions comprise at least one petrochemical fuel, at least one biosynthetic oil and at least one stabilizer mixture. The percentage by volume of the petrochemical fuel can be greater than 0% and less than 100%, and the percentage by volume of the stabilizer mixture can be between about 0.001% and about 0.5%.

In a split cage for a rolling bearing, cage segments each having a plurality of pockets that accommodate rolling elements are arranged in a circular manner along the circumferential direction. Protrusions are formed on end faces of rims of one of the adjacent cage segments, and grooves are formed in end faces of rims of the other one of the adjacent cage segments. By fitting the protrusions into the grooves, the adjacent cage segments are prevented from moving relative to each other in the radial direction.

The present invention provides a conductive lubricant composition, characterized in that the composition contains a lubricating base oil (A) other than a silicone oil, and a non-metallic antistatic agent (B), and exhibits a kinematic viscosity of 25 mm²/s or less at 40° C., a viscosity index of 100 or higher, a flash point of 150° C. or higher, and a volume resistivity of 1×10¹⁰ Ω·cm or less at 25° C. The invention also provides a bearing oil formed from the lubricant composition.

The invention belongs to the technical field of rubber tire manufacturing and particularly relates to a special patterned tire for a high-speed car. A tire ground connection surface comprises a central rib, two main drainage channels, two side drainage channels, connecting block type bionic pattern blocks and closed type outer tire shoulders. The design of the central rib guarantees the optimum longitudinal rigidity of the tire and enables control force of the tire to be directly transferred onto the road surface from the tire. 3D grooves in the positions of curve grooves break airflow, generating noise, in longitudinal grooves and reduce tire noise. Transverse grooves and single guide patterns keep the same direction, and thus the traction property and drainage property of the tire are improved. The fluency design of the patterns improves the contact between the patterns and the ground and greatly increases ground holding force. Due to the design of the connecting block type bionic pattern blocks, the strength and appearance individuality of the pattern blocks are improved. Due to the design of the closed type outer tire shoulders, abrasion and noise of the tire are reduced, and meanwhile high traction force, a shorter braking distance and accurate turning performance of the tire are guaranteed.

A transmission mechanism with intermittent output movement includes an output shaft rotatably mounted to first and second cams and a sun gear mounted to the output shaft. A first rocker includes a first planet gear meshed with the sun gear and first and second rollers rotatably mounted on opposite sides of the first planet gear and respectively in contact with the first and second cams. A second rocker includes a second planet gear meshed with the sun gear. An end of a first connecting rod is mounted to the first rocker. An end of a second connecting rod is mounted to the second rocker. Two ends of a link are rotatably mounted to the other ends of the first and second connecting rods. A planet gear carrier is mounted to an input shaft coaxial to the input shaft and includes an end rotatably mounted to the first rocker.

The invention provides a ship tail bearing and tail pipe water lubrication device which comprises tail bearings, tail pipes and supporting seats. The tail bearings and the tail pipes are fixed to a ship through the supporting seats, each tail bearing is composed of two half structures which can be separated in the axial direction of the tail bearing, each tail pipe is divided into an upper half part tail pipe and a lower half tail pipe part which can be separated in the axial direction, and a copper jacket is arranged outside each tail bearing and is composed of two half structures which can be separated in the axial direction of the copper jacket. As the tail bearings, the tail pipes and the copper jackets can be halved in the axial direction, no paddle or shaft is detached when the tail bearings are checked or maintained or replaced, the maintenance period is shortened, and the maintenance cost is lowered. A cooling water inlet is formed in the front end of each tail bearing and used for being connected with an independent special seawater cooling water pump and a cooling water purification treatment device, cooling seawater is forcibly drained into the first tail bearing through the corresponding cooling water inlet, all the subsequent water lubrication tail bearings can be cooled and lubricated due to the guiding effect of the tail pipes, and abnormal abrasion to the water lubrication bearings due to insufficient water supply or bad water quality can be avoided.

In a belt for a continuously variable transmission, a first line on a lower edge of an element body of a metal element is determined, and a second line straightforwardly connecting a lower end of a V-face to which a load is applied from a V-groove in a pulley and an inner end of a saddle surface is determined, so that when a downward load is applied from a metal ring assembly to an outer end of the saddle surface, the folding-resistant strength of the element body is uniform laterally. The position of the recess is determined in the vicinity of a point of intersection of the first and second lines. The lower edge of the element body is defined by the first line inside the recess and by the second line outside the recess. The durability of the metal element can be enhanced by devising the shape of the lower edge of the element body of the metal element in this manner.

The invention discloses an online detection and evaluation method of fuel impingement. The online detection and evaluation method comprises the following steps of calculating the current position of a piston and the volume in a cylinder of an engine according to cylinder diameter, stroke, connecting rod length, rotating speed, cam shaft phase and compression ratio collected; calculating the density and the temperature of gas in the current cylinder according to the current position of the piston and the volume in the cylinder of the engine, the gas quality and flow, the pressure after intercooling, the temperature after intercooling, EGR (Exhaust Gas Recirculation) rate and calibration parameter; calculating the real-time spraying pressure of the whole spraying process according to the diameter of spraying holes, the conical angle of the spraying holes, the number of the spraying holes, the flow coefficient of a spraying nozzle, the rail pressure, the electrifying time and the calibration parameter; judging whether the phenomenon of fuel impingement occurs according to the density and the temperature of gas in the cylinder, the real-time spraying pressure of the whole spraying process, the diameter of spraying holes, the number of the spraying holes and the flow coefficient of the spraying nozzle. The online detection and evaluation method disclosed by the invention has the advantages that by the arrangement, the fuel impingement can be accurately evaluated in real time.

The invention provides a slip sheet of a vane type compressor and the vane type compressor. The slip sheet comprises a first side face (71) and a second side face (72), wherein the first side face (71) and the second side face (72) are arranged back to back; a side face oil groove (73) for accommodating high pressure oil is formed in the second side face (72); and the side face oil groove (73) is formed in the direction towards the first side face (71) from the second side face (72) and does not penetrate through the first side face (71). According to the invention, high pressure oil can be fed in through the side face oil groove, so that pressure perpendicular to the slip sheet is formed on the second side face of the slip sheet to balance or reduce biasing force, moment of force is enabled to reach balance as much as possible, the slip sheet is prevented from abnormal abrasion generated by line contact formed between the slip sheet and a slip sheet notch due to the biasing force, surface contact is formed, the service life of the slip sheet is prolonged to certain degree, and the frictional power consumption at the part is reduced, wherein the biasing force is generated when the front end of the slip sheet is subjected to pressure of a high-pressure cavity and a lower-pressure cavity on two sides.

An object of the invention is to provide a spark plug having a discharge portion made of a precious metal tip, in which peeling of the precious metal tip from a surface of the discharge portion can be suppressed while spark abrasion, oxidation abrasion and abnormal abrasion of the discharge portion can be suppressed.

The invention comprises a center electrode (3), and a ground electrode (4) disposed so that its side surface is opposite to a leading end portion of the center electrode (3), characterized in that: a center electrode-side precious metal tip (31′) or a ground electrode-side precious metal tip (32′) is welded to at least one of the center electrode (3) and the ground electrode (4) to thereby form a center electrode-side discharge portion (31) having a center electrode-side discharge-surface (31t) or a ground electrode-side discharge portion (32) having a ground electrode-side discharge surface (32t) in a position opposite to a spark discharge gap g; and the center electrode-side precious metal tip (31′) or the ground electrode-side precious metal tip (32′) contains Ir as a main component, Rh, and Ni and further contains at least one of Pt and Pd.

The present invention prevents concentration of a sealed fluid near the sliding surfaces of a fixed sealing ring and a rotating sealing ring without increasing the number of parts and without providing a large scale external circulation device. Provided is a sealing device characterized in that: a shaft-sealing section comprises a radial slide bearing (11, 25) supporting a rotating shaft (2), and a sealing means (4, 30) for sealing a sealed fluid opposite to the source of the sealed fluid for the radial slide bearing (11, 25) in the rotation axis direction; and the radial slide bearing (11, 25) is provided with fluid introduction holes (20) for connecting the sealed fluid source side with the vicinity of the high pressure fluid side of the sealing means (4, 30).

The invention discloses a tire temperature and tire pressure monitoring and deflated tire anti-drop supporting device. The tire temperature and tire pressure monitoring and deflated tire anti-drop supporting device comprises a supporting assembly and a temperature and pressure sensing and radio frequency module, wherein the supporting assembly is formed by sequentially connecting a plurality of supporting pieces surrounding the outside circumference of a hub in series; the supporting pieces arranged on two ends of the supporting assembly are respectively connected with one locking piece; the two locking pieces are fixedly connected through an adjustable locking bolt; a pin shaft hole hinged to the corresponding supporting piece is formed in one end of each locking piece; the temperature and pressure sensing and radio frequency module is arranged in a sealed shell; the sealed shell is arranged on one locking piece. According to the tire temperature and tire pressure monitoring and deflated tire anti-drop supporting device disclosed by the invention, a tire pressure and tire temperature sensor and a deflated tire emergency supporting piece are integrated, so that simultaneous promotion of active prevention and passive defense can be realized, the risk of tire bursting can be reduced to the maximum, the tire bursting is avoided, and the safety performance of a vehicle is greatly improved.

The invention provides a valve timing changing device, by which a vane rotor is kept at a central position when the engine is started to prevent sloshing, knocking noise and wearing. The device includes a housing rotor (30), a vane rotor (2), an advance angle passageway (13) communicated with an advance angle chamber for operating oil to pass through, a lag angle passageway (14) communicated with a lag angle chamber for the operating oil to pass through, and a lock mechanism (40) which locks the vane rotor at a center position relative to the housing rotor and unlocks the lock by means of the hydraulic pressure of the operating oil. The lock mechanism includes an advance angle lock bar (42) and a lag angle lock bar (44). The advance angle passageway (13) guides the hydraulic pressure to unlock the lock of the advance angle lock bar and the lag angle lock bar, and the lag angle passageway (14) guides the hydraulic pressure to maintain the unlocking of the lock of the lag angle lock bar. The vane rotor is kept at the central position when the engine is started so as to ensure the stable starting performance of the engine.

The present invention provides a base oil that uses polyglycol lubricant or poly-alpha-olefin as lubricating oil in a compressor that uses carbon dioxide as a natural cooling medium to prevent abnormal wear of rollers and blades, Rotary compressor with high reliability. The method is to use carbon dioxide as a cooling medium, use polyglycol lubricants, or poly-alpha-olefins, or mineral oils as base oils in rotary compressors, and use them at the sliding contact between the blades and the rollers. Radius of curvature (Rv) (cm) of the blade expressed by the following formula (1): T