32results about How to "Flow obstruction" patented technology

The invention provides a power supply apparatus for a vehicle, wherein the rigidity and the cooling performance of the support plate which supports and cools the battery modules. The support plate 11 supports the battery modules and includes a first plate (15) and a second plate (14). The first plate (15) thermally contacts bottom surfaces of the battery modules. The second plate (14) is placed on a bottom surface of the first plate to define cooling spaces where a coolant flows. The first reinforcing projections (14c, 14d) project into the cooling spaces and extend in in a flow direction of the coolant. The plurality of second reinforcing projections (15d) is provided on a top surface of the first plate (15) and extending in a direction crossing the flow direction of the coolant. Rigidity against bending of the support plate in two directions can be secured by the first reinforcing projections and the second reinforcing projections, and the first reinforcing projections projecting into the cooling spaces extend in the flow direction of the coolant, and the second reinforcing projections project out of the cooling spaces, and the second reinforcing projections (15d) project out of the cooling spaces. Therefore the first and second reinforcing projections do not interfere with the flow of the coolant, thereby securing the cooling performance.

The invention discloses a temperature-resistant foam gel as well as a preparation method and application thereof. The temperature-resistant foam gel comprises the following components in percentage bymass: 0.3% of a polymer; 0.15%-0.35% of a cross-linking agent; 0.05%-0.15% of a foaming agent; and the balance water; the cross-linking agent is a cross-linking agent A or a mixture of the cross-linking agent A and a cross-linking agent B, and the cross-linking agent A is resorcinol; and the cross-linking agent B is formaldehyde. It is found by observing microstructures of water-based foam, polymer solution foam and the foam gel by using a microscope and a scanning electron microscope that common foam and polymer cannot keep stable for a long time due to flowing of a liquid film at normal temperature, and the liquid film of the foam gel forms a reticular gel structure, so that the viscosity and strength of the liquid film are enhanced, the flowing of the liquid film is hindered, and the foam gel has better stability at high temperature. It is shown by low-permeability fracture type rock core plugging experiment, the foam gel system can form effective plugging in rock cores, has a goodgas breakthrough inhibition effect, and has a wide application prospect in low-permeability oil reservoir.

The invention relates to the field of medical teaching instruments and particularly relates to a uterine cavity gauze packing teaching model. The uterine cavity gauze packing teaching model comprisesa base; a transparent die body is arranged on the base; reversible heat-sensitive achromatic ink is applied to the die body; the die body is internally provided with the uterine cavity; and a heater is arranged on the base. In the scheme, a student can observe the specific structure and the construction of the uterine cavity through the teaching model while a teacher makes an explanation; and whenthe student simulates packing of the uterine cavity, the model can shield the sight of the student, and the student is ensured to judge whether gauze packing is corrected or not through own learningexperience.

The invention provides an aero-engine turbine rim sealing structure. The aero-engine turbine rim sealing structure comprises multiple stages of rotor blades, multiple stages of stator blades, multiplestages of rotating discs and interstage sealing discs, the multiple stages of rotor blades and the corresponding multiple stages of rotating discs are vertically connected in a one-to-one correspondence mode, and the rotor blades and the stator blades are arranged at intervals. The interstage sealing discs are arranged between every two adjacent rotating discs. A labyrinth structure is arranged at the top of each interstage sealing disc and located below the corresponding stator blades, at least one first vent hole is formed between tooth parts of the labyrinth structure, part of cooling gasflows into a cavity between the tooth parts through the first vent holes. The mixed gas flows into a rear edge wheel sealing cavity of each stator blade after being mixed with sealing gas. According to the aero-engine turbine rim sealing structure, a small flow path is added to exhaust air between tooth parts of the labyrinth structure, so that radial impact jet flow is formed while the back pressure of backward flowing of front sealing airflow is improved, and the flowing of axial backward airflow of tooth tips is hindered.

The invention discloses a hydraulic driving system of a lifting platform. The hydraulic driving system comprises a brake, a motor and a damping reversing device, wherein the motor is communicated with an oil pump and an oil tank by virtue of the damping reversing device, the flow direction of hydraulic oil in the motor can be controlled by the damping reversing device, and the flow of the hydraulic oil in the motor is blocked after the oil supply is stopped. When braking is needed, the brake is operated, the oil supply to the motor is stopped, so that the flow of the hydraulic oil in the motor is blocked, the oil return backpressure of the motor is increased, the speed of the motor is reduced, and the brake is matched, so that the braking distance can be shortened, and the stability and comfort are increased. The invention further discloses the lifting platform, which comprises the hydraulic driving system.

The invention discloses a universal inner wall corrosion prevention and film forming device for bent and straight pipes, and belongs to the field of pipe inner wall corrosion prevention. The universalinner wall corrosion prevention and film forming device for the bent and straight pipes comprises a scraping plate and a sealing plate, wherein the end, close to the sealing plate, of the scraping plate is fixedly connected with a positioning plate, and an inner adaptive applying pipe is fixedly connected between the sealing plate and the positioning plate. According to the universal inner wall corrosion prevention and film forming device for the bent and straight pipes, the space between the sealing plate and the positioning plate is fully filled with a corrosion inhibitor, the corrosion inhibitor makes full contact with the inner wall of a pipe in the area, meanwhile, a plurality of soft brushes are used for brushing the inner wall of the pipe, so that the air gap between the corrosioninhibitor and the inner wall part of the pipe is effectively eliminated, and a uniform and complete anti-corrosion film is formed on the inner wall of the pipe; and the device has the characteristicsof high quality and high benefit in film formation, can be simultaneously suitable for the straight pipes and the irregular bent pipes through the internal adaptive applying pipe consisting of a rubber hose, elastic belts and the soft brushes, can carry out coating film formation process with the same effect on the straight and bent pipes, and has the characteristic of ultrahigh practicability.

The invention relates to a self-circulation flue gas dust collecting device and a method. A porous impeller structure is applied to a dust collecting device cavity, a cleaning fluid acts with potential energy to flow from top to bottom so as to drive a dust collecting impeller to rotate clockwise, no additional action is needed, and a self-circulation function of the device is realized; an impeller rotation process also has a certain promotion function on feeding flue gas; with the novel porous impeller structure, pollutant particles in the flue gas can be adsorbed and washed separately, so that the dust collecting efficiency is greatly improved; meanwhile, the dust collecting impeller is made of heat insulation materials, the tail end of the impeller is tightly connected with the shell, and the contraflow of the flue gas and the cleaning fluid is utilized for driving the dust collecting impeller to rotate clockwise, so that the flue gas is prevented from directing contacting the cleaning fluid, the loss of flue gas waste heat during a dust collecting process is avoided, meanwhile, the dust collecting process is prevented from obstructing the flowing of the flue gas, and the power consumption in the dust collecting process is reduced to a greater extent. The whole device has the characteristics of high dust collecting efficiency, low manufacturing and operating cost, wide application temperature range, and the like.

The invention relates to a wedge groove curvature sealing structure for dynamic and static gaps for a nuclear main pump. A static component of a nuclear main pump is provided with a sealing ring; the inner surface of the sealing ring is provided with a curvature sealing groove; the sealing groove is arranged at the inner surface of the sealing ring according to the opposite direction of the rotation of a rotor; a rotary component rotates to drive a fluid to rotate; and a working medium enters the curvature sealing groove, flowing which is opposite to the direction of a leakage flow is formed, the fluid forms the pressure resistance at the inlet of the sealing groove to block the leakage flow. The nuclear main pump provided by the invention is used under the condition of a high-pressure high-temperature high-speed large flow rate working condition, leakage flow rate can be controlled steadily and temporarily under a backflow extreme working condition, and is safe, durable and has a good leakage control effect.

The invention discloses a preparation method of polyurethane waterproof paint. The preparation method comprises the following steps: S1, dehydrating and cooling 15.04-17.8 parts by weight of polypropylene oxide glycol and 1.54-2.81 parts by weight of propylene oxide to 68-70 DEG C, then mixing with 20 parts by weight of diphenylmethane diisocyanate, raising the temperature to 76-78 DEG C, reactingfor 3.5-4.5 hours, keeping stirring in the reaction process to obtain a prepolymer; adding a surfactant and a solid filler into a ball mill, conducting ball milling for 45-60 minutes, keeping the ball milling temperature at 90-98 DEG C, then cooling to 40-50 DEG C, adding 0.5-0.7 part by weight of a defoamer, 12-15 parts by weight of methyl ethyl ketone and 0.6-0.8 part by weight of dioctyl phthalate, conducting ball milling for 30 minutes to obtain a component A; and sequentially adding 1.7-2.5 parts by weight of polyurethane acrylic resin, 17-19 parts by weight of the component A, 0.8-1.3 parts by weight of o-phenylenediamine, 0.021-0.023 part by weight of di-n-butyltin dilaurate and 0.6-1.1 parts by weight of dibutyl phthalate into 20-24 parts by weight of a prepolymer, and stirring evenly at the temperature of 52-55 DEG C to obtain the waterproof paint. The preparation method solves the problem of poor mobility of the existing single-component polyurethane waterproof paint.

The invention provides a carburetor, and fluctuation of an oil level of a fuel in a float chamber without increasing the diameter of the float chamber. A floator (7) forms a shape of a major arc which surrounds a fuel boss (1a) and is open in a pivot (9) side, and an arc-shaped upper longitudinal rib (23) protruding downward from a lower outer peripheral edge of the floator (7) is formed on the floator (7); and, on the other hand, an arc-shaped lower longitudinal rib (25) is formed on the float chamber (5), and the lower longitudinal rib (25) is erected from the bottom of the float chamber (5) to the lower surface of the floator (7) and is disposed on the inner side of the upper longitudinal rib (23).

A ventilation system (10) for an enclosure (16) containing a liquid, the system comprising a ventilation module (12) including a housing defining a channel (30) and a flow control module (14) (24), a diaphragm (20) retained within the channel, and a sorbent (22) retained within the channel; the flow control module (14) is associated with the ventilation module and includes a valve (52) having an internal channel (70) , air can flow through the valve through the internal channel (70) in a first direction and a second opposite direction, wherein the flow control module (14) acts as a liquid to flow from the enclosure (16) towards the sorbent (22) through the valve (52) barrier pieces.

The invention disclose a hydro-pneumatic suspension damping system of an underground multifunctional service vehicle. The hydro-pneumatic suspension damping system comprises a connecting rod, a piston and a cylinder barrel, the peripheral side of the piston is in sliding sealing connection with the inner wall of the cylinder barrel, the lower side of the piston is connected with the upper end of the connecting rod, a partition plate located above the piston is fixed to the inner wall of the cylinder barrel, and a damping through hole is formed in the partition plate; a sliding rod penetrates through the damping through hole in a sliding and sealing mode, the lower end of the sliding rod is connected with the upper side of the piston, an inner sunken groove is formed in the peripheral side of the sliding rod in the length direction of the sliding rod, a guide deep groove is formed in the inner sunken groove in the length direction of the inner sunken groove, and a sliding inserting rod is installed in the guide deep groove in a sliding and sealing mode; and a liquid guide hole communicating the interior and exterior of the lower portion of the guide deep groove is formed in the peripheral side of the sliding rod. According to the hydro-pneumatic suspension damping system, different oil damping effects in the compression stroke and the recovery stroke are achieved, rapid resetting of the hydro-pneumatic suspension damping system in the recovery stroke is achieved, the amplitude of the compression stroke is guaranteed, the damping effect of the hydro-pneumatic suspension damping system is guaranteed, and the change of oil flowing damping caused by the fact that oil is pressed and heated is reduced.

The present invention relates to a piston (10) for an internal combustion engine, comprising a piston head (11) and a piston skirt (15) delimited by a lower skirt edge (18), wherein the piston skirt (15) comprises a running surface (16) associated with the pressure side (DS) of the piston skirt and a running surface (17) associated with the counter-pressure side (GDS) of the piston skirt and a zone (21, 21') is associated with each of the two running surfaces (16, 17), which zone starts from the lower skirt edge (18) and is exposed to a maximum load during the operation of the internal combustion engine. According to the invention, the zone (21) of the running surface (16) associated with the pressure side (DS) and/or the zone (21') of the running surface (17) associated with the counter-pressure side (GDS) is provided with a coating (23, 23') which has vertically extending grooves (24, 24').

The invention discloses a gas exhausting device of a motorcycle engine. The gas exhausting device is used for connecting two gas exhausting channels of an air cylinder head. The gas exhausting device comprises two front pipes for connecting the two gas exhausting channels of an air cylinder correspondingly, an outer pipe, a piece of silencing cotton and a silencer connected to the two front pipes. A plurality of through holes are formed in one of the front pipes; the outer pipe is arranged on the front pipe provided with the through holes in a surrounding mode; the outer pipe and the front pipe provided with the through holes are arranged in a spaced mode to define a gas chamber communicating with the through holes; and the silencing cotton is arranged in the gas chamber. Through the through holes communicating with the gas chamber and the silencing cotton, noise generated by the corresponding front pipe can be reduced, meanwhile, the situation that the other front pipe generates resonance is avoided, and thus the effect that generation of the metal striking sound of the other front pipe is avoided is achieved.