43results about How to "Avoid oil seepage" patented technology

A compact type redundant sealing structure is characterized by comprising a first shell (1), a second shell (2), an oil introducing pin (3), a first sealing ring (4), a second sealing ring (6) and a third sealing ring (8); the oil introducing pin (3) is arranged at the joint between the first shell (1) and the second shell (2); the side faces of the two ends of the oil introducing pin (3) are provided with a first sealing ring groove and a second sealing ring groove respectively; the first sealing ring (4) and the second sealing ring (6) are arranged in the first sealing ring groove and the second sealing ring groove respectively; the first shell (1) or the second shell (2) is further provided with a third sealing ring groove or an annular hole; the third sealing ring (8) is arranged in the third sealing ring groove or the annular hole; the third sealing ring (8) and the first sealing ring (4) form a redundant sealing structure on one side; and the third sealing ring (8) and the second sealing ring (6) form a redundant sealing structure on the other side. The compact type redundant sealing structure is compact in structure, good in reliability, and capable of achieving dual seal of the compact-structure portion and effectively preventing oil leakage which frequently appears on a single-seal structure.

The invention belongs to the field of polymeric sealants and specifically relates to a silicone sealant and a preparation method thereof. The silicone sealant is used for solving the technical problems of tool low modulus and unideal adhesive property to concrete of an existing silicone sealant. The silicone sealant is prepared from such components in parts by weight as 100 parts of hydroxyl-terminated polydimethylsiloxane, 1-150 parts of nano calcium carbonate, 1-5 parts of fumed silica, 1-12 parts of coupling agent, 8-60 parts of plasticizer, 0.1-4 parts of tackifier, 0.1-1.8 parts of mold-proof agent and 0.1-5 parts of catalyst. The invention also provides the preparation method of the silicone sealant. The silicone sealant has excellent adhesion to building materials such as concrete, is good in weather ageing resistance and good waterproof effect, and can be applied to relatively severe environments.

The invention discloses stable and non-oil-leaking type transparent silica gel for an electronic component. The stable and non-oil-leaking type transparent silica gel for the electronic component is composed of a component A and a component B in a mass ratio of 1:1, wherein the component A is composed of vinyl-terminated polysiloxane, polysiloxane one vinyl-terminated end of which is provided with an organic group and a catalyst; and the component B is composed of vinyl-terminated polysiloxane, polysiloxane one hydroxyl-terminated end of which is provided with an organic group, hydroxyl-terminated polysiloxane, hydrogen-containing silicone oil and an inhibitor. The stable and non-oil-leaking type transparent silica gel for the electronic component can not produce an oil leaking phenomenon as time goes on after being cured, and an oil leaking phenomenon of a non-functional plasticizer is avoided; polysiloxane one hydroxyl-terminated end of which is provided with an organic group and hydroxyl-terminated polysiloxane are adopted as raw materials, and chain extension is effectively carried out, so that strength of silica gel is improved while hardness of the silica gel is reduced and elasticity of the silica gel is improved.

The assembly process of the double oil cylinder pushing mechanism for injection molding machine disclosed in the present invention, S1, inserting the first plunger into the first flow cavity in the cylinder body; S2, contacting the side wall of the annular protrusion on the second piston One end surface is coated with abrasive, and then the second piston coated with abrasive is placed into the second flow chamber through the second flow chamber port in the cylinder; S3, the side with abrasive on the second piston and The side wall of the annular protrusion is in close contact with and rotates after applying pressure to the second piston at the same time. The side wall of the annular protrusion and the side with abrasive on the second piston are ground mutually so that the side wall of the annular protrusion and the second piston Sealing is achieved between one side of the piston; S4. Use the third end cover and the sealing ring to close the port of the second flow chamber, and insert the pressurized plunger on the third end cover through the perforation of the second piston In the pressurized chamber at the end of the first plunger. It improves the driving efficiency, and the end surface of the piston has a high tightness with the surface in contact with it.

The invention discloses a pump body of a lubricating pump, comprising a pump shaft support hole, a rotor cavity and a big end surface. The big end surface is used for mounting the pump cover and recesses inwards along the radial direction of the rotor cavity to form stepped-holes. The invention also discloses a pump cover of the lubricating pump, comprising the pump body and the pump cover. The pump cover is embedded into the stepped-holes and matched with the stepped-holes in transition. The invention also discloses a lubricating pump, comprising the pump body, the pump cover, an inner rotor, an outer rotor and a pump shaft. The edge of the pump cover is matched with the stepped-holes in transition and seals the rotor cavity, the pump shaft passes through the pump shaft support hole, theend part of the pump shaft extends into the support hole at the end part of the pump shaft, the pump shaft is also internally provided with an overflow circumfluence hole which extends from one end of the pump shaft far from the pump cover along the radial direction of the pump shaft, and the axial length of the overflow circumfluence hole is shorter than that of the pump shaft. The invention improves the locating accuracy and the locating strength of the pump cover, simplifies the assembling flow, improves the working efficiency, avoids the engine oil leakage phenomenon, and has simple and compact structure and easy implementation.

The invention discloses an electric driving transmission system for an electric vehicle. The electric driving transmission system comprises a driving shell, wherein an input shaft sub-assembly, an output shaft sub-assembly and a differential mechanism sub-assembly are arranged in the driving shell; the input shaft sub-assembly is matched with the output shaft sub-assembly; the output shaft sub-assembly is matched with the differential mechanism sub-assembly. The electric driving transmission system is technically characterized in that a brake mechanism sub-assembly is further arranged in the driving shell; the differential mechanism sub-assembly comprises a differential mechanism driven gear meshed with shaft teeth of an output shaft and a differential mechanism positioned in the differential mechanism driven gear; the brake mechanism sub-assembly comprises a gear-shifting arm, a parking control shaft, a gear-shifting disk with four gear grooves, a lock rod which is limited in the driving shell and is provided with a V-shaped block, a plate spring which is fixed in the driving shell and is matched with the gear-shifting disk, a pawl rotating shaft which is limited in the driving shell, and a pawl which is fixed on the pawl rotating shaft. The problems that an existing electric vehicle transmission mechanism is short in maintenance period, short in service life, low in operation stability, poor in sealing property during high rotating speed, likely to burn and the like are fundamentally solved.

The invention discloses a medical operation table, comprising a base, a lifting cylinder and a rotating cylinder, wherein the lifting cylinder is installed at the top of the base, a seat plate is installed at the top of the lifting cylinder in a rotating mode, a back plate is installed at one end of the seat plate in a rotating mode, a leg plate is installed at the other end of the seat plate in a rotating mode, and a head plate opposite to the seat plate is installed on the end face of the back plate in a rotating mode; the lifting cylinder comprises an outer cylinder at the top of the base and an inner cylinder at the top of the base, the inner cylinder is arranged inside the outer cylinder, an outer cylinder jacket capable of moving up and down sleeves the outer cylinder, the top of the outer cylinder jacket is matched with the seat plate, one end of the rotating cylinder is arranged on the side wall of the outer cylinder jacket, and the other end of the rotating cylinder is arranged at the bottom of the seat plate. The medical operation table can bear larger torque in longitudinal and horizontal directions, is firmer, and can greatly reduce the possibility of oil leak or oil seepage of a hydraulic device and greatly improve the reliability.

A compact redundant sealing structure is characterized in that it includes a first housing (1), a second housing (2), an oil pin (3), a first sealing ring (4), a second sealing ring ( 6) and the third sealing ring (8); the joint of the first casing (1) and the second casing (2) is provided with an oil passage pin (3), and the sides of the oil passage pin (3) are respectively provided with The first seal ring groove and the second seal ring groove, the first seal ring groove and the second seal ring groove are respectively provided with a first seal ring (4) and a second seal ring (6); the first housing (1) Or the second casing (2) is further provided with a third sealing ring groove or an annular hole, and a third sealing ring (8) is arranged in the third sealing ring groove or the annular hole. The third sealing ring (8), the first sealing ring (4) and the second sealing ring (6) respectively constitute a redundant sealing structure on one side. The invention has compact structure and good reliability, can realize double-channel sealing in the compact structure, and effectively avoid oil leakage often occurring in the single-channel sealing structure.

The invention discloses a vertical replaceable graded filter oil filter, comprising a filter body, the top of the filter body is threadedly connected with a sealing cover, and the inner cavity of the sealing cover is fixedly connected with a second filter The inner cavity of the sealing cover is located at the bottom of the second filter screen and filter paper is arranged, the bottom of the sealing cover is fixedly connected with a protective cover by bolts, and the surface of the protective cover is fixedly connected with the first filter screen. The present invention uses a filter body, a sealing cover, a protective cover, a sleeve rod, a limit plate, an annular spacer, a first filter element, a damping rod, a second filter element, a first filter screen, an oil inlet passage, a filter paper, and an oil outlet passage. , the second filter screen, limit spring, moving plate and vertical rod, which solves the problem that the oil filter on the existing market does not have a detachable and graded filter structure. During use, once the filter element is replaced, the overall The cost of dismantling and discarding is high, which is not conducive to the sustainable development of resources.

The invention discloses an anti-icing asphalt concrete, which comprises the following components by weight: 37-39 parts of gravel with a particle size of greater than 11mm and less than or equal to 15mm; 13-15 parts of gravel with a particle size of greater than 6mm and less than or equal to 11mm; 4 parts of gravel with a particle size of greater than 3mm and less than or equal to 6mm; 40-42 parts of stone chips with a particle size of greater than 0 and less than or equal to 3mm; 3 parts of mineral powder; 5-6 parts of modified asphalt; and 5-6 parts of an admixture. The invention also discloses a preparation method of the anti-icing asphalt concrete. The preparation method provided by the invention not only ensures that the road anti-icing admixture is wrapped by asphalt, but also prevents a too high breakage rate of the road anti-icing admixture due to too long stirring time. With the proportion adopted by the invention, the porosity of the mixture is much smaller than that of a common asphalt mixture. After compaction, because of good compactness, the anti-icing asphalt concrete is not affected even in rainy days, the previous phenomenon that a honeycomb structure can appear on the pavement after completion of anti-icing asphalt concrete construction for a period of time can be completely eradicated, the pavement strength can be more durable, and the pavement service life can be prolonged.