37results about How to "Avoid wear failure" patented technology

The invention discloses a dynamic and static pressure ceramic sliding bearing lubricated by water or water-based lubricating liquid, which comprises a bearing sleeve, wherein a flange is arranged at one end of the bearing sleeve, and external threads are arranged at the other end of the bearing sleeve; a ceramic shaft sleeve is assembled at the outer layer of the bearing sleeve; a ceramic shaft bushing which comprises a special liquid cavity and a liquid hole structure is arranged outside the ceramic shaft sleeve; a shaft bushing sleeve with the special liquid cavity and the liquid hole structure is assembled at the outer layer of the ceramic shaft bushing; and the bearing of the invention also comprises a bearing end cover, wherein a ceramic ring is assembled at the inner end of the bearing end cover, and internal threads matched with the external threads of the bearing sleeve are arranged on the inner ring of the bearing end cover. The bearing of the invention can improve the wear resistance and the corrosion resistance, can operate in the poor water condition where sandy solid particles are contained, can be lubricated by the water-based lubricating liquid formed by adding other additives into water or water-based liquid; at the same time, the bearing has larger carrying capacity and rigidity, and can ensure a safe and stable operating state, thereby greatly prolonging the operation life.

The invention relates to a major diameter soil-pressure balance shield machine full stratum cutter comprises a cutter flange, a landing leg structure, a cutter center, a cutter periphery, a cutter outer ring, a cutter spoke, a cutter panel, and a opening area; the main structure of the cutter adopts a high strength steel plate; the front face of the cutter is connected to a wear-resisting composite steel plate in a paving and welded mode; the two faces of the composite steel plate are made of different materials, the wear-resisting side is chromium carbide steel plate and the other side has good welding performance to ensure the quality of the paving welding, and the position that cannot pave the wear-resisting composite steel plate surfacing is bead welded with a wear-resisting layer; twosteel pipes with diameters being 25mm are laid on the surface of the front face of the cutter in the cutter diameter direction in a cross mode; hydraulic oil is filled in the steel pipes and the steel pipes are connected to a hydraulic circuit; whether the cutter is worn or not is judged by the pressure change of the hydraulic circuit; the wear-resisting property of the cutter is improved by using the major diameter soil-pressure balance shield machine full stratum cutter, and the service life is prolonged; and wear pattern of a tool and the cutter can be monitored in real time, the tool canbe replaced timely to prevent the tool form wearing, and the major diameter soil-pressure balance shield machine full stratum cutter is suitable for shield full stratum geological condition.

An improved composite sealer of compact vertical probe in blast furnace is installed between bearing supports and both ends of a body. One end of a coiling shaft assembly works in high temperature zone and the other works in Three sealers are designed at the hot terminal, first one consisting of sealing cover, pressing cover and filler ring; second one consisting of sealing cover and pressing cover in zigzag way; and third one arranged between shaft and pressing cover. A pre-fastened sealer is arranged at cool terminal, consisting of transparent cover, sealing ring with coil and seat. Sealing structure is respectively used at both ends of the bearing seat with water cooling tank. The sealing structure is high-temperature resisting, dust-proof and leakage-proof so as have long service life.

The embodiment of the invention provides a monitoring type dynamic pressure sealing device and method for monitoring the opening and closing state of a sealing end face so as to solve the problem thatthe critical rotating speed of the opening and closing state of a sealing end face cannot be accurately judged in real time in the prior art. The monitoring type dynamic pressure sealing device comprises a sealing moving ring, a sealing static ring, a static ring gasket, a static ring seat, an elastic element and a sensor assembly. According to the embodiment of the invention, the sensor elementis used for detecting a shearing resistance value for preventing the sealing static ring from rotating; under the condition that the shearing resistance is reduced, it is determined that the sealing end face between the sealing moving ring and the sealing static ring is opened; under the condition that the shearing resistance is increased, it is determined that the sealing end face between the sealing moving ring and the sealing static ring is closed; and under the condition that the shearing resistance is not changed, it is determined that the opening and closing state of the sealing end facebetween the sealing moving ring and the sealing static ring is not changed. During use of a seal, the rotating speed can be rapidly increased until the seal end face is opened, a wear rotating speedinterval can be effectively avoided, and seal end face wear failure caused by long-time non-opening of the seal end face is avoided.

The invention relates to a hydraulic servo-motor control seat spring box. The spring box comprises a box body, a guide rod (4), a guide sleeve, a spring and a connector rod (15) are arranged in the box body, the guide rod (4) is connected with the box body, one end of the guide sleeve is connected with the box body, the other end of the guide sleeve is connected with the connector rod (15) in a sliding mode, the guide sleeve and the connector rod (15) are sleeved with the spring, a wear-resistant copper sleeve is installed at the end, close to the guide rod (4), of the guide sleeve and connected with the guide rod (4) in a mechanical contact mode. The hydraulic servo-motor control seat spring box has the advantages of vibration prevention, vibration resistance, impact and abrasion resistance, collision and abrasion prevention, long service life and the like. Under the conditions of large torque, long stroke and horizontal installation, the vibration amplitude and impact abrasion of equipment can be effectively reduced, the abrasion failure of the spring is avoided, the reliability of the hydraulic servo-motor control seat spring box is greatly improved, and the safe and stable operation of a unit is effectively ensured.

The invention relates to a water passing device and a maintenance method thereof. The water passing device comprises a cylinder ring end disc water passing hole and a cylinder ring connecting disc water passing hole which are formed in the cylinder ring, an end disc water passing groove, an end disc connecting water passing groove and an end disc water passing hole which are formed in the end disc, and blade water passing grooves and blade water passing holes which are formed in the blades. The water inlet channel is formed in the connecting disc, the triangular water tank is arranged at the joint of the end disc and the starting end of the blade, the water inlet channel, the cylinder ring connecting disc water through hole, the blade water through groove and the blade water through hole are sequentially communicated, and the cylinder ring end disc water through hole, the end disc connecting water through groove, the end disc water through groove and the end disc water through hole are communicated. The triangular water tank is communicated with the blade water through tank and the end disc connecting water through tank at the same time; the maintenance method of the water supply device comprises the step of respectively inserting flexible steel bars into the water channels in the end disc and the blades to clean the corresponding water channels. Abrasion and sealing-off failure in use can be avoided, maintenance is easy, the service life of the roller can be prolonged, and the safety of the underground working environment is improved.

The invention discloses an exhaust brake valve for an engine. The exhaust brake valve for the engine comprises a control cylinder, a supporting plate, a valve body, and a cover; a piston push rod of the control cylinder is connected to a first valve plate and a second valve plate in the valve body through a control mechanism; the control mechanism comprises a first connecting rod, a second connecting rod, a first rotating shaft, and a second rotating shaft, wherein the first rotating shaft and the second rotating shaft are symmetrically arranged relative to the piston push rod; a first rockerarm is installed on the first rotating shaft, the first rocker arm is connected to the first connecting rod through a first movable pin, the first connecting rod is connected to the piston push rod, and the first rotating shaft is connected to the first valve plate; a second rocker arm is installed on the second rotating shaft, the second rocker arm is connected to the second connecting rod through a second movable pin, the second connecting rod is connected to the piston push rod, and the second rotating shaft is connected to the second valve plate; and a leaf spring is arranged on the side edge of the first connecting rod. According to the exhaust brake valve for the engine, the problems of failure of the control mechanism and eccentric grinding and jamming of the piston push rod are effectively solved, operation is simple and convenient, reliability is high, and the sealing performance is good.

The invention relates to an all-formation cutter for an earth pressure balance shield machine, comprising a cutter flange, leg structures, a cutter center, a cutter periphery, a cutter outer ring, cutter spokes, a cutter panel, an opening area and the like; main structure of the cutter is made with high-strength steel plates; a wear-resistant composite steel plate is laid and welded to the front of the cuter; two sides of the wear-resistant composite steel plate are different in material, the wear-resistant side is made with a chromium carbide steel plate, the other side has good welding performance in order to ensure the quality of laying welding, and the part where a wear-resistant composite steel plate is unable to be laid is provided with a wear-resistant welded layer by surfacing; twosteel tubes 20 mm inn diameter are laid on the front surface of the cutter along the diameter direction of the cutter in crossing manner; the steel tubes are filled with hydraulic oil and connected to a hydraulic oil line; whether the cutter is abraded is judged according to changes in the pressure of the hydraulic oil line. The all-formation cutter has the advantages that wear resistance of thecutter can be improved, the service life of the cutter can be extended, abrasion of a tool and the cutter can be monitored in real time, the tool can be changed in time to prevent abrasion of the cutter, and the all-formation cutter is applicable to shielding for all-formation geological conditions.

The invention discloses steel for a pre-embedded fastener of a glass curtain wall, and a production method thereof. The steel for the pre-embedded fastener of the glass curtain wall comprises the following chemical components in percentage by mass: 0.06%-0.09% of C, not greater than 0.10% of Si, 0.30%-0.40% of Mn, 0.40%-0.45% of Cr, 0.40%-0.44% of Ni, 0.35%-0.40% of Mo, 0.20%-0.25% of Cu, 0.020%-0.050% of Al, 0.010%-0.030% of Ti, not greater than 0.018% of P, not greater than 0.010% of S, not greater than 0.0015% of [O], and the balance Fe, wherein As+Sn+Sb+Pb+Bi is not greater than 0.035%. According to the steel for the pre-embedded fastener of the glass curtain wall, and the production method thereof, low C content, Si content and Mn content are designed, and appropriate amounts of elements Cr, Ni, Mo, Cu, Ti, Al and the like are added in the steel, so that the toughness and the corrosion resistance of the steel are improved while the strength is guaranteed, and meanwhile, the weldability is improved. According to the production method, compared with a common Q355B steel plate, cutting procedures for the steel plate, and material waste are reduced, and therefore, the production method has the advantages of being efficient, economic, safe and the like, is capable of greatly overcoming the defects of a method for manufacturing a pre-embedded fastener from the Q355B steel plate,realizes efficient and energy-saving production, and improves the market competitiveness.