73results about How to "Reduced sealing performance" patented technology

The so-called comb-type labyrinth sealing device (S1) is disposed in a gap between a rotor blade (2), i.e. a rotating member, and a labyrinth packing (9), i.e. a stationary member. The sealing device (S1) has a plurality of sealing fins (F1, F2) arranged on the opposite sides of the gap opposite to each other. The sealing fins are axially spaced apart at unequal pitches, and hence a possibility that some of the clearances between the opposite sealing fins (F1, F2) decrease when a casing holding the labyrinth packing (9) and a rotor (1) are axially displaced relative to each other due to the difference in thermal expansion between the rotator and the casing increases.

The refrigerating machine oil composition of the invention is characterized by containing a mixed base oil which has a kinematic viscosity at 40° C. of 0.11 to 8 mm²/s and which is composed of a low-viscosity base oil (A) having a kinematic viscosity at 40° C. of 5 mm²/s or lower, and a high-viscosity base oil (B) having a kinematic viscosity at 40° C. of 20 to 400 mm²/s, each of the base oil (A) and (B) being composed of at least one species selected from among a mineral oil, a synthetic hydrocarbon compound, an oxygen-containing compound, and a sulfur-containing compound. The refrigerating machine oil composition exhibits enhanced energy saving performance by virtue of its low viscosity, has excellent sealing performance and load resistance, and can be employed in various refrigeration means, particularly suitably in a closed-type refrigerator.

A carboxylic derivative composition derived from a carboxylated isobutylene-polyene copolymer having n ranging from about 200 to about 10,000, said copolymer having thereon from about 0.8 to about 7 moles per mole of copolymer of groups derived from at least one α,β-unsaturated carboxylic acid or reactive equivalent thereof, reacted with at least one of (a) amines characterized by the presence within their structure of at least one condensable H—N< group, (b) alcohols. (c) reactive metals or reactive metal compounds, and (d) a combination of two or more of any of (a) through (c), the components of (d) having been reacted with the carboxylated isobutylene-polyene copolymer simultaneously or sequentially, in any order. Also, a process for preparing carboxylic derivative compositions, additive concentrates and lubricating oil compositions containing the carboxylic derivative compositions and methods for increasing the viscosity index of lubricating oil compositions.

A method for manufacturing a DDR zeolite membrane element including the steps of: immersing a porous substrate in a raw material solution, forming a DDR zeolite membrane containing 1-adamanthanamine on a surface of the porous substrate by subjecting a DDR zeolite to hydrothermal synthesis in the presence of DDR zeolite seed crystals, applying a glass paste onto the surface of the porous substrate so as to contact the membrane, and heating the membrane at 500 to 800° C., thereby burning away the 1-adamanthanamine contained in the membrane and melting the glass paste to form a membrane-like glass seal contacting the membrane on the surface of the porous substrate. The method for manufacturing a DDR zeolite membrane element can inhibit the permeation of the DDR zeolite membrane from being hindered in a contact portion between the membrane and the glass seal and inhibit poor seal of the glass seal.

An apparatus for sealing a glass package by applying a force to a glass assembly while simultaneously irradiating a sealing material disposed between the two glass substrates with a beam of radiation. The applied force is translated in unison with the radiation beam. The radiation cures and/or melts the sealing material, depending upon the sealing material. The applied force beneficially improves contact between the glass substrates and the sealing material during the sealing process, therefore assisting in achieving a hermetic seal between the substrates.

Provided is a piping connection structure which assigns a function to restrict a pipe body from coming off to a member other than a resin tube, improves in sealing performance and can suppress the amount of fuel permeation. A resin tube comprises a tube body portion; a first diameter-expanding portion formed to increase in diameter from an axial end of the tube body portion and axially positioning seal members by holding the seal members in an axial gap with a retainer; and a second diameter-expanding portion formed to further increase in diameter from the first diameter-expanding portion, and to contact an outer circumferential side of the seal members and be connected to the retainer while in contact with the retainer. Thickness of the first diameter-expanding portion is equal to or greater than thickness of the tube body portion.

The invention relates to a seal box and a refrigerator with the same. The sealing box comprises a top cover and a drawer; the top cover is provided with a platy body, two extension portions downwardly extending out from the platy body and parallel to the longitudinal direction, and an extension portion parallel to the transverse direction; upper edges of two sides plates and a back plate of the drawer respectively extend outwardly to form flanges; the drawer is arranged relative to the top cover to enable an air gap to be formed between two sides, opposite to the corresponding extension portions, of each flange; cross sectional dimensions of the air gaps are configured to satisfy the condition that air surrounding the sealing box is partially blocked from flowing into the sealing box from the air gaps. Due to the air gaps, air surrounding the sealing box can be blocked from entering the sealing box, thus other food in the refrigerator can be prevented from influencing the food in the sealing box, and taint of odor can be effectively prevented.

Provided is a cap device for home use to temporarily cover the stoma resulting from a urostomy, colostomy or ileostomy procedure. It provides a favorable means of preventing leakage during routine cleaning around the stoma during the ostomy pouch replacement process. The device may include, in any combination, use of a flexible elastomeric material for creating low suction to assist with retention, a shaped lip for comfort and sealing, a disposable liner, or internal absorption material to help avoid spillage and leakage.

A water closet (WC) or toilet bowl usable in either in the: 1) sitting, 2) front facing squatting, or 3) rear facing squatting postures. The WC consists of an elongated receptacle (10) similar in ratio of length to width to an eastern squatting-type WC, with shrouds (11) at each end to contain urine spray and footrests on each side, at a slightly lower level than the receptacle, but at such a height above the floor that mounting the footrests is not uncomfortably precarious. The volume below the receptacle and footrests is used for a cistern, fed from a normal pressurised water supply, so that the flush water source is near the siphon jet entrance at the front part of the S-bend. A hinged seat, of suitable thickness/height so that when folded down and resting on the receptacle, forms a suitably high ring-shaped sitting surface.

A seal structure for a vehicle, which includes a door member and a seal member attached thereto. The seal member includes a horizontally extending upper seal lip which comes into elastic contact with a peripheral part of an opening provided on a vehicle body, and a vertically extending side seal lip which comes into elastic contact with another peripheral part of the opening. The upper seal lip and side seal lip are connected to each other by die forming, thus forming a connected portion thereof. The upper seal lip and side seal lip have, on a side of the connected portion to be proximate to the vehicle body when the door member is closed, a seal sheet member covering the connected portion.

A package includes an accommodation space portion, and a first base body that forms at least a part of the accommodation space portion. A first through-hole, which extends toward a second surface on an accommodation space portion side from a first main surface opposite to the accommodation space portion, is provided in the first base body, in a cross-sectional view of the first through-hole, the first through-hole includes a first inclined portion that is inclined from the second surface toward the first main surface, and a second inclined portion that is inclined from one end on a first main surface side of the first inclined portion toward the first main surface, a second angle made by the second inclined portion and the second surface is larger than a first angle made by the first inclined portion and the second surface, and the first through-hole is sealed with a sealing member.

An orbiting fluid machine has a feature that the speed of sliding movement is low, while vibrations are small, its performance is lowered when the rotational speed becomes high, and this problem is resolved by the following structure. A displacement fluid machine includes a displacer making an orbital motion within a casing into which a working fluid is drawn, thereby drawing and discharging the working fluid, in which an oil retaining mechanism or a seal mechanism is provided at each of opposite end surfaces of the displacer. This results that, axial gaps at the end surfaces of the displacer are effectively sealed so as to reduce a leakage loss, thereby achieving a high performance and a high reliability.

An apparatus comprises first and second members that are rotatable relative to each other. The second member is disposed in a circular hole defined in the first member. A main oil seal is disposed between the second member and an inner circumferential surface of the circular hole of the first member. A secondary oil seal is movable along a center line of the circular hole of the first member and is positioned on the opposite side of the main oil seal from the lubricant. A dust seal is positioned on the opposite side of the secondary oil seal from the lubricant. An annular groove is formed on one of the inner circumferential surface of the circular hole and an outer circumferential surface of the second member. The secondary oil seal is movable from a reserve position, which opposes the groove, to a sealing position, which does not oppose the groove.

A closure having an operating member, a lower member having a near end connected to the operating member and a far end spaced along an axial direction from the proximal end. One or more sealing members extend from the lower member. A first bore extends along the axial direction through the operating member and into the lower member. Second bores extend along the axial direction into the operating member. The second bores are located around the first bore with dividers between adjacent bores. The dividers are arranged to increase the compression stiffness of the operating member.

The invention provides a pumping oil cylinder and pumping equipment provided with the pumping oil cylinder. The pumping oil cylinder comprises a work cylinder, a pumping piston rod, a pumping piston, a positioning piston and a positioning piston rod, wherein an inner baffle ring, the pumping piston, the positioning piston, the positioning piston rod and the pumping piston rod divide the work cylinder into a first cavity, a second cavity, a third cavity and a fourth cavity, the first cavity, the second cavity, the third cavity and the fourth cavity are not communicated with one another, the second end of a rod inner cavity is communicated with the third cavity, and the work cylinder is provided with a first connecting port communicated with the first cavity, a second connecting port communicated with the second cavity, a third connecting port communicated with the third cavity and a fourth connecting port communicated with the fourth cavity. The pumping oil cylinder can achieve output of different pumping pressures simply and conveniently.

Provided is a spherical camera, including a first shell, a second shell, and a first waterproof ring installed at the joint of the first shell and the second shell; the first shell comprises a first rotating shaft; the second shell comprises a second rotating shaft; the first rotating shaft and the second rotating shaft fit with an support bracket for installing the spherical camera, to allow the spherical camera to rotate to different areas to acquire images; the first waterproof ring is a planar closed-loop waterproof ring; the combination surface between the first shell and the second shell is a plane, and the combination plane passes through the sphere center of the spherical camera.

The invention discloses a motor combined hermetically-sealed structure. The structure comprises a shaft extension end (1) and an end cover (3) of a rotor, wherein a reinforced seal (4) is arranged between the end cover (3) and the shaft extension end (1); a movable seal is arranged between the end cover (3) at the axial outer side of the reinforced seal (4) and the shaft extension end (1); the movable seal comprises a movable sealing ring (5) which is arranged on the side of the shaft extension end (1) and a static sealing ring (6) which is arranged on the side of the end cover (3); an axial labyrinth sealing structure is arranged on the contact part of the movable sealing ring (5) and the static sealing ring (6). The motor combined hermetically-sealed structure has the beneficial effects that the motor combined hermetically-sealed structure is simple in structure, convenient to install and change and reasonable in design; and a combined waterproof structure of a non-contact type movable seal and a contact type static seal is adopted, water, mud and sand can be effectively prevented from entering a motor, the reinforced seal is slightly influenced, accordingly, the sealing performance of the reinforced seal is improved, the service life of the reinforced seal is prolonged, and the structure is reliable in performance.

The invention discloses a dry gas seal system capable of automatically regulating a clearance, and a regulating method thereof. The system comprises a static ring, a moving ring, springs, a sensor, adata acquisition unit, a computer and a sectional type clapboard. The sensor is arranged on the sealed end surface of the static ring; the sensor is connected to an input end of the data acquisition unit; an output end of the data acquisition unit is connected with an input end of the computer; an output end of the computer link-controls the sectional type clapboard; the multiple springs are fixedly arranged between the sectional type clapboard and the non-sealed end surface of the static ring; a plurality of dynamical pressure slots are uniformly formed in the sealed end surface of the movingring along the circumferential direction; and the static ring sealed end surface and the moving ring sealed end surface are matched to form dry gas seal. The sensor transmits acquired data to the computer, the data is processed so as to obtain a sealed end surface gas film clearance value, a signal is provided to drive the sectional type clapboard to move, the springs are compressed, and the static ring bends and deflects for compensating the deformation of the end surfaces, so that the sealed end surfaces are tend to be parallel, the influence of the deformation on sealing is reduced, the stable operation of sealing is maintained, and the risk of seal failure is reduced.

A cylinder head gasket includes a metal plate having at least one cylinder bore and a plurality of bolt holes arranged around the at least one cylinder bore. A bead is formed on the metal plate to surround the at least one cylinder bore. The bead has at least one pointed shape portion pointed outwardly between two of the bolt holes.

Herein disclosed is a connection structure including a waterproof sheet disposed in an inner surface of a wire connection section and has an opening section in a position corresponding to a conductor exposed section, in which the waterproof sheet is configured such that a front end of the waterproof sheet is positioned on a front side from a front end of a conductor crimp section and a rear end of the waterproof sheet is positioned on a rear side from a rear end of the cover crimp section.

The invention discloses an anti-tilt type plastic cup sealing machine, and relates to the technical field of sealing machines. The anti-tilt type plastic cup sealing machine comprises a bottom box, astraight plate is fixedly connected between the top of the inner wall of the bottom box and the bottom of the inner wall of the bottom box, fixing devices are fixedly connected to two sides of the straight plate and two sides of the inner wall of the bottom box, top boxes are fixedly connected to two sides of the top of the bottom box through supporting columns, a motor is fixedly connected to thebottom of the inner wall of the top box, and a first belt pulley is fixedly connected to an output shaft of the motor. A second belt pulley is connected to the surface of the first belt pulley in a transmission mode, rotating rods are rotatably connected to two sides of the top of the inner wall of the top box through supporting rods, and a first rotating disc is fixedly connected between the opposite ends of the two rotating rods. The anti-tilt type plastic cup sealing machine prevents storage solution in a plastic cup from flowing out to reduce the sealing effect due to the fact that the plastic cup tilts during sealing through the matching use of a plastic fixing seat and the fixing devices; and a waste film barrel and a film sealing barrel can be conveniently disassembled and replacedby using a clamping device.

An oxygen mixing valve comprises a valve body. The valve body has an oxygen inlet, an air inlet, and a gas mixture outlet. A mixing chamber in communication with the gas mixture outlet, an oxygen chamber in communication with the oxygen inlet, and an air chamber in communication with the air inlet are disposed in the valve body. A first guide seat is elastically disposed in the oxygen chamber, and a second guide seat is elastically disposed in the air chamber. A first ball and a second ball are respectively disposed at inner ends of the first guide seat and the second guide seat. The first ball and the second ball are connected through a ball mandril. A mandril is movably disposed at an outer end of the first guide seat, a bearing capable of rotating is disposed at an outer side of the mandril, an involute cam is disposed at an outer side of the bearing, and the involute camis connected to an output shaft of a stepper motor. The oxygen mixing valve has advantages of simple structure, convenient mounting and maintenance, low manufacturing cost, capability of sensitively and precisely adjusting the ratio of the oxygen to air, and capability of controlling the tidal volume in conjunction with a common proportional valve.