52results about How to "Solve the lack of pressure resistance" patented technology

A heat exchanging tube is provided with a flat tube main body having a predetermined length and a plurality of refrigerant passages extending in a tube longitudinal direction and arranged in a tube widthwise direction. The following relational equations (a) to (c) are satisfied: W=6 to 18 mm . . . (a); Ac / At×100=50 to 70% . . . (b) and P / L×100=350 to 450% . . . (c), where “W” is a width of the tube main body, “Ac” is a total cross-sectional area of the refrigerant passages, “At” is a total cross-sectional area of the tube main body ( including the refrigerant passages), “L” is an external perimeter of the tube main body and “P” is a total inner perimeter of the refrigerant passages. With this tube, enough pressure strength can be obtained and the passage resistance can be decreased while keeping the light weight, and further the heat exchanging performance can be improved.

A heat exchanging tube is provided with a flat tube main body having a predetermined length and a plurality of refrigerant passages extending in a tube longitudinal direction and arranged in a tube widthwise direction. The following relational equations (a) to (c) are satisfied: W=6 to 18 mm . . . (a); Ac / At×100=50 to 70% . . . (b) and P / L×100=350 to 450% . . . (c), where “W” is a width of the tube main body, “Ac” is a total cross-sectional area of the refrigerant passages, “At” is a total cross-sectional area of the tube main body ( including the refrigerant passages), “L” is an external perimeter of the tube main body and “P” is a total inner perimeter of the refrigerant passages. With this tube, enough pressure strength can be obtained and the passage resistance can be decreased while keeping the light weight, and further the heat exchanging performance can be improved.

The invention discloses a medium-voltage working electrolyte of an aluminum electrolytic capacitor. The electrolyte comprises constituents based on ratio by mass: 36.5-78% of main solvent, 3-20% of auxiliary solvent, 8-15% of main solute, 6-17% of auxiliary solute, 0.05-0.3% of waterproof mixture, 2-7% of voltage-resistant promoter, 1.5-3% of formation special modifier and 0.6-1.5% of hydrogen elimination agent, wherein the main solvent is ethylene glycol. A mixed solvent system is employed, high-temperature characteristic is ensured, and low-temperature characteristic is also compatible; theboiling point (245 DEG C) of diethylene glycol is high, the condensation point (-44 DEG C) of Gamma-butyrolactone is low, an appropriate amount of voltage resistant promoter is added, U<flash>=alg Rho+b (V), Rho is resistivity (ohm. cm) of the electrolyte, a and b are relevant constants of the electrolyte, thus, the electrical conductivity of the medium-voltage electrolyte is high to cause that the flash voltage is low, and enough voltage resistant capability can be ensured under the condition of high electrical conductivity by the introduction of the voltage resistant promoter; and moreover,with the addition of a corrosion resistant agent, the corrosion probability during long-term working is reduced, and the lifetime of a product is ensured.

The invention discloses a low leakage current working electrolyte for medium-voltage aluminum electrolytic capacitor and a preparation method thereof, wherein the working electrolyte comprises the following components in parts by weight: 40-80% of main solvent, 4-15% of auxiliary solvent, 7-20% of main solute, 5-15% of auxiliary solute, 0.05-2% of water-inhibiting agent, 0.5-5% of pressure-resistant promoting agent, 0.5-1.5% of oxidant, 0.5-1.5% of preservative and 0.5-1.5% of hydrogen-eliminating agent, wherein the main solvent is glycol. The invention has the advantages that sufficient voltage capacity is still ensured under the condition of high conductivity; the hydration of the aluminum foil during long-time work is reduced, the oxide film is more stable, the saturated vapor pressureof the oxide film is reduced, and the flash fire voltage is improved; the electrolyte oxidation efficiency is improved, and the corrosion probability of the anode lead of the capacitor is reduced; theleakage current is reduced, the hydrogen is eliminated, the capacitor bulge is prevented, and the service life of the product is prolonged.

There is provided a valve holding member for holding a valve of a pipe coupling. The valve holding member includes a hub part 33 having a guide hole 34 for a valve stem, two arm parts 32 diametrically opposing each other on the peripheral edge of the hub part, and spring holding parts 31 formed at the peripheral edge.

A heat exchanger comprises a header (2) and a plurality of tubes (1) connected to the header. The manifold (2) comprises: an inner peripheral wall portion (10) having a generally flat arcuate cross-sectional shape to which the tube (1) is connected; an outer peripheral wall portion (11), the outer peripheral wall portion (11) has a substantially semicircular cross-sectional shape, the outer peripheral wall portion (11) faces the inner peripheral wall portion (10); and the inner peripheral wall portion (10) and the The curved peripheral wall portion (12) connected to the peripheral wall portion (11) is connected. The parameters of the header (2) such as the outer radius of curvature Ra of the inner peripheral wall portion (10), the outer curvature radius Rb of the connecting curved peripheral wall portion (12), and the outer curvature radius of the outer peripheral wall portion (11) fall within a specific range, This reduces the header volume and weight while ensuring sufficient pressure resistance.

The invention provides a pLugging device for a shieLd tunneL. After the pLugging device carries out pLugging, a sensor in the pLugging device detects a Leakage point, the Leakage point is repaired intime, and therefore the seaLing effect of the pLugging device on the shieLd tunneL is improved. According to the pLugging device, the Leakage point can be searched for, compensation is carried out intime aiming at the Leakage point, the fit degree of the pLugging device and the tunneL is increased, and the pLugging effect is improved.

The invention discloses a magnetic liquid sealing device. The magnetic liquid sealing device comprises a shell, a rotating shaft, a plurality of shaft sleeves and a plurality of pole shoes; a cavity is formed in the shell; the rotating shaft is rotatably arranged in the cavity; the shaft sleeves are sleeved on the rotating shaft so as to rotate along with the rotating shaft; the plurality of shaft sleeves are arranged at intervals in the axial direction of the rotating shaft; the pole shoes are sleeved outside the shaft sleeves; the plurality of pole shoes are in one-to-one correspondence with the plurality of shaft sleeves; the inner circumferential surfaces of the pole shoes and the outer circumferential surfaces of the shaft sleeves are spaced in the radial direction of the rotating shaft to form sealing gaps; and magnetic liquid is arranged in the sealing gaps. The magnetic liquid sealing device has the advantages of being compact in structure and high in reliability.

A heat dissipation substrate for an LED has copper foil or copper alloy foil layered on one side of a polyimide film and also has aluminum foil or aluminum alloy foil layered on the other side thereof. The thermal resistance between the surface of the copper foil or the copper alloy foil and the surface of the aluminum foil or the aluminum alloy foil is 1.8 DEG C / W or less.

An inductor that includes a coil having a winding portion in which a conductor having a coating layer is wound, and a pair of lead-out portions formed by leading out the conductor from the winding portion; and a magnetic portion including magnetic powder and resin and configured to seal the coil. The magnetic powder includes first particles having a first average particle diameter, and second particles having a second average particle diameter smaller than the first average particle diameter, and a thickness of the coating layer has a value larger than the second average particle diameter.

A puncture repair liquid holding container includes: a container main body provided with and opening portion and a holding portion where puncture repair liquid is held; and a cap attached to the opening portion; wherein a cross-sectional shape of the holding portion is non-true circular, and a metal reinforcing member provided around an entire circumference of the holding portion is provided on at least a portion of the holding portion in a height direction.

The present invention provides: a selective-permeability membrane which has a coating layer composed of a phospholipid double membrane, the coating layer enduring the pressure applied during water treatment and not detaching; and a method for manufacturing the same. Provided is a selective-permeability membrane that has a membrane body having selective permeability and a coating layer that is formed on a surface of the membrane body and that is composed of a phospholipid double membrane containing a channel material. The selective-permeability membrane is characterized in that the phospholipid double membrane contains, as the phospholipid, a first phospholipid containing an unsaturated fatty acid in an acyl group and a second phospholipid in which two acyl groups comprise a saturated fatty acid with a carbon number of 16-24.

A decorative element including a number of stones (4) assembled in a closed frame (2) to form two decorative faces. The stones include two opposite external faces (10, 12) which are decorative, and internal faces serving as joints (20, 22) between these stones, and as edging (24, 26) with the interior contour of the frame (32). Some of these internal faces (22, 24) have grooves (28) arranged inside the volume of the frame (2) and accepting strips (34) the ends of which cross the contour of this frame at two opposing points in order to be secured. The decorative element is characterized in that the interior contour (32) of the frame (2) has a protruding cross section which fits into corresponding channels made in the internal edging faces (24, 26) of the stones (4). Applicable for example to the creation of jewelry.

Provided is a hydrogen-filled hose (1) capable of allowing high-pressure hydrogen gas to flow at a greater flow rate. The present invention is characterized by being provided with a reinforcing layer (3) coaxially laminated between an inner surface layer (2) and an outer surface layer (5), the inner surface layer (2) being formed from a thermoplastic resin having a dry hydrogen gas permeation coefficient of 1 * 10-8 cc * cm / cm2 * sec * cmHg or less at 90 DEG C, and the outer surface layer (5) being formed from a thermoplastic resin having a dry hydrogen gas permeation coefficient of 1 * 10-8 cc * cm / cm2 * sec * cmHg or less at 90 DEG C, the reinforcing layer (3) being laminated coaxially between the inner surface layer (2) and the outer surface layer (5). The diameter of a flow path (2a) formed by the inner surface layer (2) is 10-25 mm (inclusive), the number of the reinforcing layers (3) is 4-8 (inclusive), each reinforcing layer (3) has a spiral structure formed by helically winding a metal wire (4), and puncture holes (6) penetrating in the thickness direction are distributed in the outer surface layer (5), so that hydrogen gas h penetrating through the inner surface layer (2) can easily and smoothly flow out to the outside of the hose (1).

The invention relates to an inductor. The inductor includes an element assembly and a pair of outer electrodes. The element assembly includes a coil and a magnetic body. The coil includes a winding portion in which conductive wires each having a coating layer are spirally wound in two stages connected at their innermost segments and a pair of extension portions extended from their outermost segments in the stages of the winding portion. The magnetic body has a mounting surface, is made of magnetic powder and resin, and seals the coil such that the mounting surface is approximately parallel with a winding axis of the winding portion. The outer electrodes are disposed on the mounting surface. Each of the extension portions includes a first region and a second region. The element assembly hasa recess portion allowing the first regions and an outer surface of the winding portion positioned between the first regions to be exposed.

The invention discloses a magnetic liquid sealing device suitable for high-linear-speed rotating working conditions, belongs to the field of sealing of mechanical engineering, in particular, is suitable for sealing under high-linear-speed rotating working conditions, and can solve the problems of weak pressure resistance and lower reliability when the linear speed in the rotating shaft starting process of a traditional magnetic liquid centrifugal sealing structure is lower. The device consists of a rotating shaft (1), a shell (2), a left bearing (3), a first separation magnetic ring (4-1), a first pole shoe (5-1), a first sealing ring (6-1), a first permanent magnet (7-1) and the like. When the rotating shaft (1) rotates at low linear speed, an axial magnetic liquid sealing module achieves a sealing effect; and under the condition of sufficient axial space, the number of axial magnetic liquid sealing teeth can be increased, so that the pressure resistance is improved, the sealing reliability is improved, and the problem of weak pressure resistance in the rotating shaft starting process of the traditional magnetic liquid centrifugal sealing structure is solved.