77results about How to "Improve oil storage capacity" patented technology

The invention discloses a cone crusher, which comprises a frame and a movable cone main shaft arranged in the frame, wherein the lower end of the movable cone main shaft is provided with an eccentric mechanism, the eccentric mechanism is in transmission connection with a transmission assembly, a supporting assembly for supporting the movable cone main shaft is arranged below the eccentric mechanism, a hydraulic lifting system for changing the height of the supporting assembly is arranged below the supporting assembly, the hydraulic lifting system comprises a hydraulic cylinder body which is fixed on the lower part of the frame and provided with a cavity and a piston which is arranged in the cavity and moves up and down, the supporting assembly is arranged at the upper end of the piston, and the lower end of the hydraulic cylinder body is provided with a hydraulic oil port which is externally connected with a hydraulic station and communicated with the cavity. The cone crusher has the advantages of novel and unique structure and stable operation, improves the rotational speed of an eccentric sleeve, improves the work efficiency and yield thereof, prolongs the service life of a machine, reduces the use cost and avoids 'teleflex' and running vehicle.

The invention discloses a walking type chassis of a symmetrical type multi-freedom-degree four-wheel all-wheel-drive walking type excavator and belongs to the field of application of engineering machinery. The walking type chassis comprises a front right leg (1), a rotation base (2), a rear right leg (3), a lifting oil cylinder (4), a front left leg (6) and a rear front leg (5). The structure of the front right leg and the structure of the front left leg are symmetrical. The structure of the rear right leg and the structure of the rear left leg are symmetrical. The rotation base is of a symmetrical structure and is composed of a central oil tank and two side oil tanks, wherein the two side oil tanks are located at the two sides of the central oil tank in a stepped mode in the vertical direction. The rotation base is connected with the front right leg, the rear right leg, the front left leg and the rear left leg through a lifting oil cylinder (4) and a corresponding sleeve A. According to the walking type chassis, oil streams in the rotation base can be communicated with each other between the central oil tank and the side oil tanks, so that oil storage does not only depend on the inner space of the central oil tank, and the oil storage capacity is increased by at least one time; on the condition of field operation, when fuel oil in a main oil tank is used up, fuel oil in the chassis can be extracted, and therefore the field self-sustaining capacity is high.

The invention discloses a cone crusher. The cone crusher comprises a machine frame, and a movable cone main shaft which is arranged in the machine frame; the lower end of the movable cone main shaft is provided with an eccentric mechanism which is in drive connection with a drive assembly; a support assembly which supports the movable cone main shaft is arranged below the eccentric mechanism; the lower part of the support assembly is provided with a hydraulic lifting system which can change the height of the support assembly; the hydraulic lifting system comprises a hydraulic cylinder which is fixed on the lower part of the machine frame and is provided with an inner cavity, and a piston which can vertically move in the inner cavity; the support assembly is arranged at the upper end of the piston; and the lower end of the hydraulic cylinder is provided with a hydraulic oil port which is externally connected with a hydraulic station and is communicated with the inner cavity. The cone crusher has a novel and unique structure, runs stably, improves the rotation speed of an eccentric bushing, and avoids rotation and galloping; and the working efficiency and yield of the cone crusher are improved, the service life of a machine is prolonged, and the using cost is reduced.

The invention discloses a high-strength antifriction double-layered iron base powder metallurgy material and a preparation method thereof. The preparation method comprises the following steps that a densification enhancer is mixed in a matrix, so that a matrix material is dense and high in strength; a compound pore-forming agent is mixed in a surface layer to enable a surface layer material to be porous and oil-bearing, and besides, the requirements on the hardness and the wear resistance of the surface layer are met, and the contact interface and the lubricating condition of a friction pair are kept stable, so that the novel high-strength antifriction double-layered iron base powder metallurgy material is prepared. The bearing property, the wear resistance and the antifriction anti-seizing property of the iron base powder metallurgy material are improved remarkably, and high strength and a high lubricating property are effectively combined.

The invention relates to the technical field of a metal plate, in particular to a hot galvanized plate and a preparation method thereof. The hot galvanized plate comprises a steel board layer and a frosted galvanized layer covered on an outer surface of the steel board layer, wherein, a frosted surface is arranged in an even circular structure and the controllable density of distribution thereof is in the scope of 1 * 1 to 10 * 10mm <-2> while the controllable roughness Ra is in the scope of 1.0 to 10.0 micron and the Rpc value is 10 to 100cm <-1>. The preparation method of the galvanized plate comprises the steps of pickling of a hot-rolled substrate board, cold rolling of the pickled substrate board, degreasing of the surface of the hard-rolled substrate board, annealing of the hard-rolled substrate board, galvanizing of the annealed substrate board and frosted finish of the galvanized plate so as to obtain the frosted hot galvanized plate; in addition, the surface of an equalizing roller body used in the frosted finish of the plate is processed with laser frosted treatment. Meanwhile, the hot galvanized plate of the invention mainly solves the problems that the surface of the current galvanized plate is highly bright, and follow-up coatings and the substrate board have poor adhesion.

The invention discloses a fuel-saving Cr-O-N nanocrystalline composite ceramic coated piston ring of a diesel engine and a preparation method of the fuel-saving Cr-O-N nanocrystalline composite ceramic coated piston ring of the diesel engine. The nanocrystalline composite ceramic coated piston ring which is composed of Cr, CrN and a Cr-O-N nanometer crystal layer in sequence is generated by means of the technology of arc ion plating. The fuel-saving type Cr-O-N nanocrystalline composite ceramic coated piston ring of the diesel engine and the preparation method of the fuel-saving Cr-O-N nanocrystalline composite ceramic coated piston ring are reasonable in structural design and achieve gradual change of components and the hardness gradient. In addition, the prepared Cr-O-N nanocrystalline composite ceramic coating layer and the piston ring have the advantages that good binding force, good wear-resistant property and corrosion-resistent property are provided, higher oil storage capability and hardness are provided, the defects that existing piston rings are poor in wear-resistant property and insufficient in oil storage capacity are overcome, long-term stable work of the piston ring is ensured, and the using performance of the piston ring is enabled to be greatly improved. Moreover, the fuel-saving type Cr-O-N nanocrystalline composite ceramic coated piston ring of the diesel engine has the advantages of being stable in quality in the process of coating, high in processing efficiency, and capable of reducing production cost of factories and having good industrial application prospect.

The invention discloses a method for producing an austempered ductile iron (ADI) cylinder sleeve, belongs to metal materials, and in particular relates to the technical field of production processes for ADI supercharged engine cylinder sleeves. The method comprises the steps of casting an ADI cylinder sleeve casting blank, finely machining the cylinder sleeve casting blank, performing isothermal quenching treatment and shot blasting treatment and machining platform reticulate patterns. The method solves the problem that the fatigue property and the abrasion resistance of the conventional service materials such as boron cast iron, boron-copper cast iron, chromium-molybdenum-copper cast iron, high-phosphorus alloy cast iron, high-phosphorus cast iron, high-content chromium-molybdenum-nickel cast iron and chromium-molybdenum-copper-boron alloy cast iron cannot meet the service requirements of high strength engines.

The invention discloses a method for preparing an efficiently hydrophobic and oil-absorbing sponge with a fluorine-containing silane coupling agent as a cross-linking agent. According to the method, a porous sponge is taken as a base body, an organosilicone hydrophobic layer is formed on the surface of the sponge through simple soaking and curing operations, the original water-absorbing and oil-absorbing amphiphilic sponge becomes a hydrophobic and oil-absorbing selective sponge, and the method is a surface modification method with which the performance of the sponge can be changed simply and efficiently. The original high porosity of the porous sponge is remained due to the organosilicone hydrophobic layer, and efficiently hydrophobic and oil absorbing characteristics are obtained. According to the method, the preparation process is simple, the reaction conditions are mild, raw materials are low in price and easy to obtain, and the prepared sponge has oil-water selective absorption, enables oil and water to be quickly, efficiently and automatically separated, has high oil storage capacity and recycling performance and can be squeezed repeatedly for recovery of oils.

The invention discloses a single-upright-column mooring type wellhead production operation platform. The platform comprises an upright column body, a positioning and mounting assembly, a rotating platform, an oil extraction operation platform and at least one inner well slot, wherein the upright column body is of a hollow structure, the positioning and mounting assembly is arranged on the bottom of the upright column body, the rotating platform is arranged on the outer portion of the upright column body and can rotate around the axis of the upright column body, and the rotating platform comprises a mooring connection device; the oil extraction operation platform is arranged on the top of the upright column body and positioned on the rotating platform, and the oil extraction operation platform is provided with an oil extraction operation component; and at least one inner well slot is arranged inside the upright column body, wherein at least one inner well slot can be connected with theoil extraction operation platform. The single-upright-column mooring type wellhead production operation platform can adapt to an economy index for marginal oil field exploitation.

The invention relates to an oil storage device of a high-pressure motor bearing, which is mainly used for improving the protection grade of the high-pressure motor bearing, such as the functions of dust prevention and water prevention. An oil throwing disk is fixed on a rotating shaft of a motor, a V-shaped ring is put in the outer end of an inner ring of a left cover of the bearing to improve the protection grade, and the inner side of a bearing set is fixed through a right cover of the bearing. The oil storage device is characterized in that labyrinth parts are arranged on an inner cover and an outer cover of the bearing, and the left cover of the bearing is internally and additionally provided with the inner ring. The oil storage device has simple, compact and reasonable structure and obvious effect. Under the condition of not changing structure materials, the protection grade of the motor is effectively improved through additionally arranging a labyrinth ring and the labyrinth parts on the inner cover and the outer cover of the bearing and the oil throwing disk. The inner ring is additionally arranged in the left cover of the bearing, and lubricating oil is thrown into an oil storage cavity in the inner ring and the bearing due to the action of centrifugal force, thus the oil storage capacity is greatly enhanced. For part processing, the oil storage device is simple and reasonable and has no influence on mechanical property of workpieces, and for mechanical deviation, because a single radial edge is preserved with an allowance of 1mm and a single axial edge is preserved with an allowance of 2mm, the assembly of the parts have no problems.

Provided is a tensioner which can ensure, with a simple structure, both the stability of the installation state of a check valve and the capacity of an oil storage chamber. A tensioner has a plunger, a housing, a check valve, and a coil spring. The plunger has a front-side plunger part having a pressing front end portion, and a rear-side plunger part disposed on the rear side of the front-side plunger part and having a valve movement restricting portion. The check valve is disposed on the rear side of the valve movement restricting portion. The coil spring is disposed so that one end thereof is in contact with a housing bottom portion and the other end thereof is in contact with the rear side of the check valve.

The invention relates to an iron-based oil-containing bearing material of a controllable pore structure and a preparation method of the iron-based oil-containing bearing material. Hair and titanium hydride powder are mixed as a composite pore forming agent to be placed in an iron matrix blank. According to the bearing material, in the friction and wear process, oil in pores flows to the surface toform a lubricating oil film, friction is reduced, meanwhile, micro grooves in the surface of a friction pair can be filled with C60 nanoparticles in the oil so as to reduce roughness, and the effectof reducing friction is achieved. The ball grinding process is adopted, the composite pore forming agent and iron powder are mechanically alloyed, the shape of the pore forming agent is regular, the shape of the pore forming agent has geometric heritability to the pore forms, and therefore generated pores are regular in size and are evenly distributed in an iron matrix. The blank is placed in inert gas to be sintered, titanium hydride is subjected to dehydrogenation at high temperature in the sintering process, open pores are formed in the iron matrix, the hair is decomposed at high temperature, a large number of micron-order bridge pore channels are formed to penetrate through the open pores formed by titanium hydride, and connectivity of the pores is improved.

The invention discloses a forming method of a large-capacity oil pan. The method comprises the following steps of blanking; stretching and pre-forming, wherein a blank steel sheet is stamped and stretched to obtain a pre-formed oil pan, the pre-formed oil pan comprises a cuboid shallow oil pan body, the top of the shallow oil pan body is provided with an opening and a reserved edge part extendingalong the edge of the opening in parallel, and the bottom of a cavity of the shallow oil pan body is further provided with a deep oil pan body which continues to be recessed; annealing; internal pressurization forming, wherein the pre-formed oil pan is placed in an internal pressurization forming die, so that the side walls, located on the two sides of the width direction of the shallow oil pan body, of the deep oil pan body protrude outwards and form externally protruding expanding parts; trimming; flanging. According to the forming method, the structure is simple, it can be ensured that thelarge-capacity oil pan has a large oil storage capacity, and meanwhile the production efficiency and yield of the large-capacity oil pan can be improved.

The invention discloses a composite coating piston ring inlaid with wear-resistant particles. The composite coating piston ring comprises a cast iron body and a composite coating layer plated on the outer circle of the main body, wherein the composite coating layer is a mesh-patterned electroplating coating inlaid with the wear-resistant particles; and the wear-resistant particles are one or more selected from silicon carbide, silicon dioxide, aluminium trioxide and diamond. A processing method of the composite coating piston ring inlaid with the wear-resistant particles comprises the steps of preparing a composite plating solution with a concentration of chromic anhydride being 200-400 g / L, a concentration of sulfuric acid being 2-6 g / L, a concentration of benzoic acid being 4-10 g / L and 100-130 g / L of the wear-resistant particles; forming a hard chrome layer on the surface of the piston main body by applying a forward current; carrying out reverse etching by applying a backward current, the wear-resistant particles being adsorbed to cracks during the reverse etching process; and repeating the reverse etching process, so that the wear-resistant particles are inlaid in the composite plating layer. The composite coating piston ring inlaid with the wear-resistant particles has good wear-resistant performance, high oil storage property and long service life. The production method provided by the invention is simple in operations and is stable.

The invention discloses a semi-submersible oil storage platform system for well drilling. The semi-submersible oil storage platform system for well drilling comprises a semi-submersible main platform and a plurality of floating sub-platforms, wherein the floating sub-platforms are movably connected with the main platform through connecting arms, and motion of the floating sub-platforms is coupled with motion of the main platform. Due to the fact that the motion of the floating sub-platforms is coupled with the motion of the main platform in a deep sea environment with severe wind wave conditions, multi-freedom-degree motion of the main platform can be greatly reduced, the semi-submersible oil storage platform system for well drilling can have good adaptability, and the self-maintenance capacity of the semi-submersible oil storage platform system for well drilling under the storm condition is improved. Due to the fact that the floating sub-platforms in the four directions of the central main platform can play a role in storage of crude oil, the oil storage capacity of a semi-submersible oil storage platform for well drilling is greatly improved. Due to the fact that fuel compartments or fresh water tanks can also be arranged in the floating sub-platforms, the space of the main platform is effectively saved. Due to the fact that the floating sub-platforms are far away from the main platform, better operation safety is achieved.

The invention relates to a preparation method of an efficient oil absorption material. According to the method, (perfluorobutyl)ethylene is introduced into polymerization as a comonomer, a long--carbon-chain fluorine-containing monomer is introduced on the basis of isobutyl acrylate and divinylbenzene, and the hydrophobic performance of the long-carbon-chain fluorine-containing monomer allows compatibility of the resin to oil to be improved and allows the oil adsorption and keeping capability to be enhanced. The soft component isobutyl acrylate is introduced into polymerization so as to provide a long-carbon-chain branch structure, thus optimizing the three-dimensional space structure of the resin molecule, enhancing oil molecule capturing capability of the three-dimensional space structure of the resin molecule, and significantly enhancing the comprehensive oil adsorption performance of the resin. Therefore, an acrylic acid series resin with high oil adsorption and high performances is developed. The introduction of the fluorine-containing group enhances the corrosion resistance of the resin skeleton and protects the sphere surface, thus prolongs the service lifetime.

The invention discloses a preparation method of a high efficient oil storage type oil absorbent felt material, and belongs to the field of oil pollution treatment. Oyster mushroom bran is processed byplasma to increase the content of polar groups on the surface so as to improve the lipophilic property and oil adsorption performance; methyl methacrylate and butyl acrylate are used to prepare composite resin, which can increase the oil absorption amount and has good mechanical stability and lipophilic-hydrophobic properties; processed chitosan is added to enhance the oil absorbing performance of the oil absorbent felt material, moreover, chitosan has excellent thermal stability and a good solid-solid phase change performance; when the oil absorbent felt material is used in an environment with a large temperature difference, during the solid-solid phase change process, the chitosan can maintain a relatively stable volume in the oil absorbent felt material, and thus other components can well exert their functions. The problem that the oil absorbing performance and oil storage performance of a conventional oil absorbent felt are not good is solved.

The invention relates to a preparation method of a surface anti-friction and oil storage membrane layer of a rubber sealing part. The method comprises the following steps: (1) preparing a base material: after mixing a rubber elastomer and a curing agent, pouring a mixture on a mother board mold; baking and peeling to form a uniform micro-pit array, so as to obtain the base material; (2) washing and drying the base material to obtain a treated base material; (3) after cooling the treated base material to room temperature, putting the treated base material into a vacuum chamber and vacuumizing until the pressure is 1.0*10<-2> Pa; (4) introducing purified air into the vacuum chamber and carrying out air plasma bombardment by utilizing a high-power pulse ion source; (5) introducing Ar, H2 andCH4 gas into the vacuum chamber and carrying out ionization deposition by utilizing the high-power pulse ion source, so as to obtain uneven and partitioned diamond-like membranes at the bottoms and side parts of pits on the surface of rubber; after cooling the temperature of the vacuum chamber to room temperature, taking out the diamond-like membranes. The preparation method has the advantages ofsimple technology and easiness for industrial application; the obtained hard diamond-like membranes have good performance.

The invention relates to an impact-resistant steel wire rope for a pile driver. The impact-resistant steel wire rope is characterized by comprising a steel wire rope core strand, an inner-layer steelwire strand, a filling fiber strand and an outer-layer steel wire strand, wherein the steel wire rope core strand, the inner-layer steel wire strand, the filling fiber strand and the outer-layer steelwire strand are sequentially arranged from inside to outside; the steel wire rope core strand adopts the single high-elasticity shear-resistant fiber strand, and the filling fiber strand is arrangedbetween the inner-layer steel wire strand and the outer-layer steel wire strand, so that a gap between the middle strands of the steel wire rope is greatly reduced, the effective area of the steel wire rope is increased, the compactness of the steel wire rope is improved, the breaking force of the whole steel wire rope is not influenced, the service life is also prolonged, the fatigue resistance is further improved due to the increase of the oil storage capacity, the inter-strand friction buffering impact force can be effectively reduced by filling the fiber strand, the breaking force of the whole steel wire rope is improved, the contact area between each steel wire in the steel wire rope and equipment is increased, and the purpose of prolonging the service life of the steel wire rope is achieved.

The invention relates to a ball maintenance chain, its preparation method and a linear movement mechanism. The ball maintenance chain is characterized in that holes on a long flat strip are aligned in longitudinal direction; spacers are formed between the holes to separate two adjacent holes; upper and lower spacer blocks are combined on the spacers; the surfaces between the upper and lower spacer blocks and the holes are smooth surfaces, a portion of which are ball-shaped coating surfaces and smoothly connected with hole surfaces; each ball-shaped coating surface has an opening, which is disposed between the axial vertical plane and the axial side face of the long flat strip; ball-shaped coating surfaces are disposed in opposite directions and formed by side directional open and shut of left and right moulds; a smooth cylindrical surface on each end of the long flat strip, is connected with an indentation surface inside or outside the long flat strip, and can be curved inward or outside to turn smoothly.

The invention relates to a method for processing a flexible metal-plastic thrust bearing bush of a main transmission box for milling equipment with laser, belonging to the metallurgical field. The graphite is used as coating, and the impact wave induced by strong laser is used to impact the surface of the flexible metal-plastic thrust bearing bush with laser so as to improve the density of a plastic layer on the surface, form a small pit of a certain depth on the surface of the plastic layer and increase the adhesion and the oil storage performance of a lubricating oil film on the surface. When the supply of the high-pressure lubricating oil interrupts, the lubricating oil stored in the small pit on the surface of the plastic layer can maintain the existence of the lubricating oil film, and the graphite particles embedded in the plastic layer can fulfill the lubricating function after the lubricating oil film disappears and before the surface of the flexible metal-plastic thrust bearing bush is impacted with laser so as to shorten the time of real unlubricated friction and reduce the wear of the plastic layer due to unlubricated friction.

The invention discloses a casting process for high abrasion-resistant and dust-resistant cylinder sleeve suitable for western area. The cylinder sleeve comprises 3.0-3.3% of C, 2.1-2.4% of Si, 0.8-1.1% of Mn, 0.1-0.2% of P, 0.02-0.08% of S, 0.35-0.45% of Ti, 0.2-0.4% of Sb, 0.8-1.1% of Cu, 0.25-0.35% of Cr and 90.62-92.38% of Fe. The casting process for the cylinder sleeve comprises the following steps of firstly processing Ti and Sb into synthetic particles with the diameter of 2-3 mm for use; mixing the alloy according to proportions and melting; adding the synthetic particles when a melting temperature reaches 1,550 DEG C; purifying for 6 minutes after the particles are added; then carrying out twice inoculations, firstly inoculating a nucleating agent in a large ladle and then inoculating in a casting ladle, wherein a casting temperature is 1,350 DEG C-1,320 DEG C; a casting speed is 2 kg / s; a cooling intensity is water-cooled 120 seconds; putting a blank with a temperature of about 600 DEG C into a solution for quenching; and transferring a metallographic structure of the cylinder sleeve into a lower bainite. The cylinder sleeve can increase usage performance and abrasion performance of the engine, prolongs service life, reduces energy consumption, improves exhaust quality of the engine and protects natural environment.

The invention discloses high-abrasion-resistance anti-dust cylinder liner casting technology. The casting technology is characterized by including following alloy elements of 3.0-3.3% of C, 2.1-2.4% of Si, 0.8-1.1% of Mn, 0.1-0.2% of P, 0.02-0.08% of S, 0.35-0.45% of Ti, 0.2-0.4% of Sb, 0.8-1.1% Cu, 0.25-0.35% of Cr and 90.62- 92.38% of Fe. A production technology method includes: firstly, processing the Ti and Sb into synthetic particles 2-3mm in size for standby application; secondly, compounding and smelting alloy proportionally, adding the synthetic particles proportionally when the smelting temperature reaches to 1550 DEG C, purifying for 6 minutes after the particles are added, then performing inoculation twice by inoculating an inoculant in a bale prior to inoculating in a pouring ladle, and controlling the pouring temperature to be 1350-1320 DEG C, pouring speed to be 2kg / s and cooling intensity to be water cooling for 120 seconds; thirdly, when a blank stripped from a die is at the temperature of 600 DEG C, placing the blank into a solution for quenching to enable a metallographic structure of a cylinder liner to be changed into a lower bainite.

The invention relates to an oil bearing which is provided with a cylindrical body which is internally provided with a perforation; the upper circumferential edge of the body forms a crown with enlarged round diameter; the length of the crown is less than the length of the body; furthermore, the internal edge of the top end of the body is provided with a ring trough which is arranged in the crown; the surface of the crown is provided with a plurality of troughs; the bottom of the body is provided with an oil trough; the circumferential edge of the oil trough is provided with a plurality of troughs which are staggered with the troughs on the surface of the crown. By the design, the internal effect of the lacing force on the perforation of the oil bearing is reduced, thus reducing the lacing center situation; furthermore, the length of the body is more than that of the crown, therefore, the oil storage volume of the oil bearing inside a sleeve can be increased; furthermore, a plurality of troughs in staggered type which are arranged at the bottom of the body and on the surface of the crown can prevent the overflowing and dispersing of oil products.

The invention discloses a cylinder sleeve casting technology. Ti and Sb are processed into compound particles; materials are blended proportionally and smelted into an alloy; inoculation is performed twice, that is, an inoculant is inoculated first in a bale and then in a casting ladle; casting and quenching treatments are performed. According to the cylinder sleeve casting technology, Ti and Sb compound particles are dispersed uniformly, a cylinder sleeve has a compact texture and is good in thermal stability, the process is simple, the cost is low, industrialized production is easy to implement, and the wear resistance is enhanced. Inoculation is performed twice to refine the metallographic texture further and enhance the mechanical property.

A column type hydraulic tappet includes a housing; a plunger correspondingly installed in the housing; and a high pressure chamber for a hydraulic medium formed between the bottom face of the plunger and the bottom of the housing and is sealed by a check valve opening toward the high pressure chamber. The housing includes an external circumferential groove on the outer diameter for passing the hydraulic medium and an inner circumferential groove on the inner diameter for passing the hydraulic medium. One or more housing oil holes are disposed between the outer circumferential groove and the inner circumferential groove. The plunger includes a sealed hemisphere head portion, a shaft portion and a body portion. An indent neck portion between the head and shaft portions of the plunger has a wall thickness 105%-120% of the wall thickness of the other portions of the plunger.

The invention discloses a semi-submersible oil storage platform system for well drilling. The semi-submersible oil storage platform system for well drilling comprises a semi-submersible main platform and a plurality of floating sub-platforms, wherein the floating sub-platforms are movably connected with the main platform through connecting arms, and motion of the floating sub-platforms is coupled with motion of the main platform. Due to the fact that the motion of the floating sub-platforms is coupled with the motion of the main platform in a deep sea environment with severe wind wave conditions, multi-freedom-degree motion of the main platform can be greatly reduced, the semi-submersible oil storage platform system for well drilling can have good adaptability, and the self-maintenance capacity of the semi-submersible oil storage platform system for well drilling under the storm condition is improved. Due to the fact that the floating sub-platforms in the four directions of the central main platform can play a role in storage of crude oil, the oil storage capacity of a semi-submersible oil storage platform for well drilling is greatly improved. Due to the fact that fuel compartments or fresh water tanks can also be arranged in the floating sub-platforms, the space of the main platform is effectively saved. Due to the fact that the floating sub-platforms are far away from the main platform, better operation safety is achieved.

The invention provides a cylinder jacket based on a scale structure. A piston moves in the cylinder jacket; the cylinder jacket comprises multiple V-shaped groove sets arranged on the inner surface ofthe cylinder jacket and uniformly distributed in the piston moving direction to form the scale structure; and the V-shaped groove sets comprise multiple V-shaped grooves and multiple transition arcs.The multiple V-shaped groove sets in the scale shape are designed on the surface of the cylinder jacket, so that the oil storage is facilitated, the wear is reduced, and the service life of an engineis prolonged.