299results about How to "Improve lubrication conditions" patented technology

A planetary gearset includes a sun gear member having a sun gear body made of a steel material and an outer periphery with a plurality of teeth formed thereon. Each of the sun gear teeth has at least one mating surface for engaging mating surfaces on complementary teeth on at least one planet gear. A fatigue-resistant coating is applied to the mating surfaces of the sun gear teeth. The coating is harder and more abrasive than the mating surfaces of the planet gear teeth.

The invention provides a WS2/MoS2 solid lubricating multilayer film and a preparation method thereof, which firstly prepares a W/Mo multilayer film through double-target RF sputtering and a W layer and an Mo layer are deposited alternatively on a substrate, and then low temperature ion sulfurizing is carried out to the W/Mo multilayer film and the WS2/MoS2 solid lubricating multilayer film is prepared. The invention prepares a novel solid lubricating film, namely, the WS2/MoS2 solid lubricating nano multilayer film through two-step compound treatment. The sublayers of the WS2/MoS2 solid lubricating nano multilayer film have the same thickness and element sulfur is distributed evenly in the multilayer film, thus leading the multilayer film to have higher rigidity, good nano properties, elasticity modulus and yield strength, better practicability and excellent anti-friction and wear-resistant properties in nano mechanical properties and anti-friction and wear-resistant aspects as being compared with the existing nano multilayer films. The WS2/MoS2 solid lubricating multilayer film can be used on various friction surfaces of machinery equipment, particularly on precisely matching surfaces to reduce friction and improve lubrication conditions.

The invention discloses a plunger friction pair of a high-pressure seawater axial plunger pump with a bionic non-smooth surface. The plunger friction pair is mainly characterized in that through hole unit bodies communicated with an inner cavity of a plunger are arranged on the friction surface positioned in a cylinder body in the operation process of the outer surface of a plunger of the friction pair; the other friction surfaces of the plunger are provided with pit unit bodies. Preferably, a bush with the bionic non-smooth surface is added between the plunger and the cylinder body, a groove type trench is arranged on the outer wall of the bush, and the through hole unit bodies are regularly arranged at the bottom part of the trench. The plunger friction pair disclosed by the invention has the advantages that the lubricating capability, the bearing characteristic and the friction and wear properties of the plunger friction pair can be reasonably improved by high cost performance.

The invention relates to a surface modification processing method for the engine critical component, which belongs to the field of the steel surface chemistry thermal treatment processing technology. The processing method comprises: nitriding for the air valve finisher by using the plasma technology, adding carbon-containing gas in the nitrogen-containing gas at the late stage of nitriding and carrying out the nitrocarburizing, and placing the mould in the steam oxidizing furnace for surface oxidizing treatment. The mould treated by said technology has excellent mechanical property, improved surface hardness, improved compression resistance, improved wear resistance and improved thermal fatigue resistance.

The invention discloses a four-point contact ball bearing. The four-point contact ball bearing comprises a bearing inner ring, rolling balls and a bearing outer ring; the rolling balls are arranged between the bearing inner ring and the bearing outer ring; the bearing inner ring and the bearing outer ring are provided with an annular raceway respectively; each annular raceway and each rolling ball are contacted at two points; an included angle B between connecting lines of two contact points and the center of the rolling balls is between 30 and 120 degrees; as two contact points are between each of the annular raceways of the bearing inner ring and the bearing outer ring and each rolling ball, and the included angle B between the two contact points is between 30 and 120 degrees, radial force stressed by each contact point of each rolling ball is smaller than the radial force stressed by a rolling ball of a conventional ball bearing when the bearing is stressed by the equal load; the bearing can also bear the axial force; and as gaps are formed between the rolling balls and the annular raceways, lube or grease lubricant is convenient to store, the lubricating condition of the rolling balls is improved, and the service life of the bearing can be improved.

The invention relates to a two-row roller bearing (1) for supporting a mechanical part (2) rotatably relatively to a rotation axis. According to the invention, the roller bearing (1) has an outer ring (4) with the outer diameter of at least 1 m, a first inner ring (5), a second inner ring (6) arranged at the side of the first inner ring (5) axially relatively to the rotation axis, a group of first rolling bodies (7) rolling between the outer ring (4) and the first inner ring (5), a group of second rolling bodies (8) arranged at the side of the first rolling bodies (7) along the axial direction relatively to the rotation axis and rolling between the outer ring (4) and the second inner ring (6). The roller bearing (1) is characterized in that a first lubricating grease conveyor (21) is arranged at the first axial side of the outer ring (4) with respect to the rotation axis for supplying the first roller body with lubricating grease (22) and a second lubricating grease conveyor (27) is arranged at the second axial side of the outer ring (4) with respect to the rotation axis for supplying the second roller body with lubricating grease (22).

The present invention relates to a method using laser technology to process roll surface which can be used for cold-rolling thin sheet steel surface. Said invention uses proper laser single-pulser energy, and pulse width to make laser beam irradiate surface of roll according to a certain quantity out-of-focus in the course of processing roll by using laser, under the condition of proper pulse frequency and laser scanning speed said invention utilizes protective gas and side-blow melting bath according to a certain angle so as to obtain spherical coronal microconvex from on the surface of roll. Said roll surface processed by said invented laser technology can make coll-rolled thin-sheet steel (strip) surface from uniqu microhole lubricating structure so as to effectively reduce friction and wear-and-tear.

The invention discloses an online detection method for scrap iron content in pivoting support lubricating grease and a lubricating grease online detection device. Automatic sampling of solid lubricating grease is achieved by using a lubricating grease online detection device in the online detection method. The scrap iron content in the lubricating grease is determined by using an inductance value change of a detection coil caused by scrap iron mill grains in the lubricating grease, so as to effectively judge the abrasion degree inside a pivoting support raceway; a real-time detection value is compared with a preset pre-warning value to judge whether the lubricating grease loses efficacy, so as to provide reference for optimization of the lubricating condition of the raceway. By adopting the online detection method, the online sampling difficulty due to the fact that the solid lubricating grease cannot flow is radically solved, online detection is achieved, the problems of long analysis period, complicated detection process and the like in off-line detection are avoided, and the online detection method has important significance on evaluation of the pivoting support operation state, improvement of the lubricating condition, effective prolonging of the service life of the pivoting support, and improvement of the operation reliability. The method is simple, easy to achieve, and high in automatic degree.

The invention belongs to the technical field of non-circular gears and discloses a design method for a curved-tooth non-circular gear. The tooth profile of the curved-tooth non-circular gear is designed through a generating gear. The tooth profile equation is solved according to the curved surface of a counterpart rack, the kinematic relation of gear generation and the engagement principle. Compared with a straight gear, the curved-tooth non-circular gear designed through the method is high in contact ratio and bearing capacity. Compared with a bevel gear, the curved-tooth non-circular gear designed through the method does not generate axial force in the transmission process and has low requirements on bearings and installation. Through the arc tooth profile of the curved-tooth non-circular gear, lubricating oil is contained in the tooth surface, and therefore a quite good lubricating condition is achieved.

The present invention discloses one kind of nanometer multilayer FeS/MoS2 film prepared through one composite treating process including the first alternate deposition of Fe layers and Mo layers and the subsequent ionic sulfinuzing. The nanometer multilayer FeS/MoS2 film has the thickness ratio between the FeS layer and the MoS2 layer of 0.95-1.05, double layer thickness of 5-20 nm, and total thickness of 1-3 microns. The nanometer multilayer FeS/MoS2 film has excellent friction performance, excellent solid lubricating performance or so-called 'super lubricating performance'. It may be applied in various kinds of friction surface, especially precisely fitting surface, to reduce friction and improve lubricating condition.

There is provided a grease composition decreasing the load sensitivity to a running torque, maintaining necessary performances for a wheel supporting rolling bearing unit, and maintaining a good lubricated condition for a long time, and, a wheel supporting rolling bearing unit having the grease composition packed therein. The grease composition contains base oil, thickeners, rust inhibitors, and anti-wear agents, the base oil contains mineral oil, synthetic oil or blend oil of the mineral oil and the synthetic oil, a mix ratio (mass ratio) of the mineral oil and the synthetic oil is 0:100 to 20:80, a kinematic viscosity of the base oil at a temperature of 40° C. is 70 to 150 mm²/s, and a pour point of the base oil is equal to or lower than −40° C. The wheel supporting rolling bearing unit is packed with this grease composition.

The invention discloses a sliding-shoe friction pair of a high-pressure seawater axial plunger pump with a bionic non-smooth surface. The sliding-shoe friction pair is mainly characterized in that through hole unit bodies are arranged on an inclined disc regularly; the through hole unit bodies are respectively arranged in inwards-concave water grooves which are regularly arranged; and the water grooves are mutually communicated. Preferably, pit unit bodies are regularly arranged on the sliding-shoe friction surface matched with the inclined disc. The sliding-shoe friction pair disclosed by the invention has the advantages that the lubricating capability, the bearing characteristic and the friction and wear properties of the sliding-shoe friction pair in the lubricating environment of seawater and under the condition of high speed and heavy load can be reasonably improved by high cost performance.

The invention provides an eighteen-roller rolling mill structure. Side supporting devices of working rollers are respectively arranged in the front and at the back of as well as on and below a rolling mill machine frame assembly; each side supporting device comprises a side supporting bearing pedestal, a side roller and a side supporting roller; the side supporting device comprises a side driving cylinder which is provided with a displacement sensor and a servo valve for controlling the advancing and retreating positions of the side supporting device; when in a rolling work, the side supporting positions are set according to various technical parameters, so that the side deformation caused by the working rollers in a rolling process is counteracted and the rigidities of the working rollers are improved; with the adoption of the small-diameter working rollers and a side driving roller system mode, the demand of roller rigidity in the rolling process is ensured, and meanwhile, the rolling demand of an ultra-thin belt material is satisfied; and the rolling mill structure has the following advantages of high rolling mill opening degree, favorable lubrication for the roller and belt material, high speed, convenience to maintain equipment and low manufacturing cost of the equipment.

The invention discloses a five-shift car gearbox. The five-shift car gearbox comprises a shell, a first shaft assembly, a second shaft assembly and an individual intermediate shaft assembly. The shell comprises a front gearbox shell body, a main gearbox box and a rear gearbox shell body. The first shaft assembly comprises a shaft gear. The second shaft assembly supported in an inner ring of a first shaft and the rear gearbox shell body comprises a third-shift gear, a second-shift gear, a first-shift gear, a backward gear and an overdrive gear of the second shaft, and the third-shift gear, the second-shift gear, the first-shift gear, the backward gear and the overdrive gear of the second shaft sequentially sleeve on the second shaft along the power transmission direction; the intermediate shaft horizontally arranged under the second shaft assembly comprises an intermediate shaft transmission gear constantly meshed with the gear of the first shaft, an intermediate backward gear constantly meshed with the backward gear of the second shaft through the intermediate backward gear and an intermediate gear correspondingly and constantly meshed with the third-shift gear and the second-shift gear of the second shaft; the intermediate backward gear is simultaneously and constantly meshed with the first-shift gear of the second shaft; the intermediate backward gear is axially fixed on the joint of the main gearbox box and the rear gearbox shell body.

The invention relates to a turning driving device of crawler vehicle. Power output shaft connected with small gear is set in box body and the big gear on the shaft is mated with the small gear. The shaft is hollow. Small and big gears are cylinder gear. On the shaft left sun gear mated with left planetary gear connected with the left output shaft, right sun gear mated with right planetary gear connected with the right output shaft are set. Left ring gear connected with left bevel gear is mated with the left planetary gear and right ring gear connected with right bevel gear is mated with the right planetary gear. Left positioner is set on the left output shaft and right positioner is set on the right output shaft. Bearings are set between the left ring gear and the shaft, and between the right ring gear and the shaft. Bearings are set between left shaft sleeve connected with the left ring gear and the body, and between right shaft sleeve connected with the right ring gear and the body. Bearing is set between the left output shaft and the left shaft sleeve and bearing is set between the right output shaft and the right shaft sleeve. Turning control input shaft combined with turning bevel gear together is set on the body. The turning bevel gear is mated with the left bevel gear connected with the left ring gear and the right bevel gear connected with the right ring gear.

The invention belongs to the field of machine parts, and relates to an aligning sliding bearing for an efficient air valve of a subway. The aligning sliding bearing comprises a bearing block body (1),a sliding bearing (2), a bolt hole (3), a demounting hole (4) and an oil hole (5), wherein the bearing block body is fixed with an air valve framework by bolts; the sliding bearing is connected witha blade shaft; the demounting hole is arranged in a square shape along the radial direction of an inner hole of a bearing block; and a position which is in the radial direction of the inner hole of the bearing block and is vertical to the length direction of the bearing block is provided with the oil hole. The spherical contact surface of the sliding bearing is matched with the spherical contact surface on the bearing block, so a sliding ball is difficult to slide off in the bearing block and runs more stably, and the spherical surface assembling mode can automatically adjust the concentricityof two ends of a fan blade shaft so as to effectively solve the problem of unstable running caused by the two non-concentric ends of the fan blade shaft because the fan blade shaft is too long when the air valve is in operation. The design of the oil hole of the sliding bearing block can ensure the spherical surface lubricating condition, reduce the friction, and improve the transmission efficiency and the service life of a material.

The invention discloses a water-based honing liquid and a honing method for using the same. The water-based honing liquid comprises the following components in parts by mass: 10-30 parts of a cooling agent, 15-25 parts of a cleaning agent, 15-25 parts of a lubricating agent, 30-50 parts of an anti-rust agent, 1-5 parts of a coupling agent and 1-5 parts of a balancing agent, wherein the cooling agent consists of the following components in percentage by mass: 20-40 percent of an ethylene glycol high polymer and 60-80 parts of absolute ethanol. The water-based honing liquid has the effects of protecting the environment, cooling, cleaning, lubricating and preventing rust. Due to the adoption of the water-based honing liquid and the honing method disclosed by the invention, the processing efficiency of flat table net grains on an engine cylinder sleeve can be increased, and the quality of the flat table net grains can be enhanced.