89results about How to "Avoid loss of tightness" patented technology

A structure for connecting a crimp terminal and an electric wire includes: a crimp terminal that includes a conductor crimping portion and a coating crimping portion serially and includes an electric wire connector that is to be crimped to the electric wire; and a water stop sheet having an opening for bringing a conductor into contact with the conductor crimping portion, and laid between the electric wire connector and the electric wire. When a joint is swaged and crimped, the swaged and crimped joint has a second included angle θ2 between the bottom plate and a second line that is larger than a first included angle θ1 between the bottom plate and a first line in a cross section that is perpendicular to a bottom plate of the electric wire connector and that includes an electric wire axial line.

Sealing structures (7, 8) are installed to seal opposite open ends of an annular bearing space between an outer member (1) and an inner member (2). A wheel mounting flange (2a) of the inner member (2) is provided with a shielding plate (11). The shielding plate (11) has a tubular wall (11a) forming a labyrinth seal (10) in the vicinity of an outer peripheral surface (1b) of an outboard end of the outer member (1). The outer peripheral surface (1b) is provided with a guide structure (1c) for guiding downwardly water, flowing in between the shielding plate (11) and the outer member (1) along the flange (2a) and the shielding plate (11), and water flowing in between the shielding plate (11) and the outer member (1) along the outer peripheral surface of the outer member (1). The guide structure (1c) is constituted by an annular groove or projection.

Each of the fuel cell units making up a fuel cell stack includes a first separator, a second separator, and a third separator. A predetermined number of load receivers are provided integrally on outer ends of the first separator, the second separator, and the third separator. The load receivers of the second separator protrude toward the casing beyond the other load receivers. Resin clips are inserted into the load receivers, such that the first separator, the second separator, and the third separator are fixed together by the resin clips.

A mechanical seal that prevents deposition of a degradation material generated on a sliding interface is to be provided. In a mechanical seal including a sleeve that rotates with a rotating shaft, a seal cover fixed to a housing, a rotating ring attached to the sleeve and a fixed ring attached to the seal cover and disposed in sliding-contact with the rotating ring via a sliding interface perpendicular to the rotating shaft, a scraping member is provided on the sleeve at a position close to an inner edge of the sliding interface so as to remove a degradation material from the inner edge of the sliding interface. Alternatively a discharging structure is formed on the sleeve so as to discharge the fluid stuck to the sleeve 4 to outside of the seal cover by the rotation of the sleeve. Otherwise, a solvent or an inert gas may be filled in a space defined by the sleeve 4, the rotating ring 6, the fixed ring 7 and the seal cover 5.

The invention provides a check valve, which has a simple structure and can prevent a stop closure part (31) of a valve plate (30) opened or closed on a convection outlet (21b) from being excessively opened and reduce the flow path resistance during a valve opening process. The check valve comprises a path forming part (21) and a valve plate formed by cutting and bending a flexible thin plate. The path forming part comprises an installing part (24) for installing the valve plate. The valve plate comprises a stop closure part, an installed part (34) and a flexible deforming part (36). The installing part has an opening-degree limit part (28) provided with a limiting plane (28a). The limiting plane is provided with a following space which substantially keeps an angle bending state and meanwhile performs flexible deformation with a part connecting the flexible deforming part and the installed part as a pivot when the stop closure part is pushed by the fluids flowing through a path (21a). By the abutting against the flexible deforming part of the limiting plane, the opening angle of the stop closure part relative to the fluid outlet is limited.

The present invention provides a sealing chain, capable of preventing lubricant between a connecting pin and a sleeve from leaking as well as preventing dust from enterring, avoiding the sleeve and an outer link plate to sliding contact with each other directly, so to play excellent sealing performance for a long time and have long sealing lifetime without implementing surface thin processing to the outer link plate. The sealing mechanism (160) of the sealing chain (100) setting between the outer link plate (150) and an inner link plate (110) includes: a ring sealing piece supporting component (161), a first elastic sealing piece (162), a second elastic sealing ring (163) and a steeliness sealing ring (164).

The invention discloses an improved roadway boring machine. The upper portion of a rack is connected with a hydraulic motor and a cantilever, the outer side of the cantilever is connected with a cutting head, a nozzle is arranged on the outside of the cutting head, and a water injection pipe is further arranged inside the cantilever; a first through hole is formed between the cantilever and the water injection pipe, the hydraulic motor is connected with a water injection ring through a support frame, and the water injection ring is connected with a water inlet pipe through a water pipe joint; and the outside of the bearings are sleeved with sealing rings, each sealing ring comprises a first rubber ring and two second rubber rings, and the two second rubber rings are respectively located on both sides of each bearing, first springs are arranged between the second rubber rings and the first rubber rings, the two sides of the second rubber rings and the first rubber rings are connected through connection rigs, annular cavities are further formed inside the first rubber rings, two second through holes are formed inside the annular cavities, and the outside of two first rubber rings are sleeved with sleeve tubes. The improved roadway boring machine can improve the deficiencies of the prior art, and a spray structure of the improved roadway boring machine has a better sealing and a cooling effect.

An image forming apparatus, includes a liquid jet head; a container main body; an air opening mechanism configured to open and close an air opening path in the container main body. The air opening mechanism includes a holding part, and an opening member movably provided at the holding part. The opening member includes an air communicating path, a filter member, and an air room. An opening cross-sectional area of the air room in a direction perpendicular to an air flow-in direction is greater than an opening cross-sectional area of the air communicating path in a direction perpendicular to an air flow-in direction.

The invention discloses a positioning assembly device which is used for mounting of an on-shaft seal ring (8) of a countershaft (9). The positioning assembly device comprises a sleeve (5), a taper ring (6), a spring (4), a retainer ring (7) and a positioning ferrule (3). The top end of the sleeve (5) is provided with a hole with the diameter smaller than that of a cavity of the sleeve (5); the outer wall of the taper ring (6) is closely attached to the inner wall of the sleeve (5), taper ring (6) is capable of moving axially along the sleeve (5), and the center of the taper ring (6) is provided with a taper hole with the diameter smaller than that of the bottom end; the spring (4) is arranged in the sleeve (5) and positioned between the taper ring (6) and the top end of the sleeve (5); the retainer ring (7) is arranged in the sleeve (5) and positioned in a cylindrical opening at the bottom end of the taper ring (6); and the positioning ferrule (3) is sleeved on the sleeve (5), and the inner wall of the positioning ferrule (3) is attached to the outer side wall of the on-shaft seal ring (8). Using the positioning assembly device for mounting the on-shaft seal ring, scratch damage between the on-shaft seal ring and a shell can be prevented, and weakening of tightness caused by scratch of the on-shaft seal ring by the shell due to improper mounting can be avoided.

A first housing (10) has a frame (11) with concave accommodation portions (20). A sub-connector (31) with female terminal fittings (33) is accommodated in the concave accommodation portions (20). A collective rubber stopper (36) is accommodated inside the concave accommodation portions (20) to seal a gap between a peripheral surface of an electric wire (34) pulled out of the sub-connector (31) and an inner peripheral surface of each concave accommodation portion (20). A first cam follower (19) is formed on an outer surface of the frame (11) and can engage an operation member (80). The frame (11) has an outer wall (12) defining an outer surface thereof where the first cam follower (19) is formed and an inner wall (18) separated from the outer wall part (12) via separated spaces (17) and constructing the inner peripheral surface of each concave accommodation portions (20).

A heat storage type gas processing apparatus capable of providing a high sealing function by a simple structure. A gas to be treated (G) and a treated gas (G') are passed, in this order, through a plurality of heat storage chambers (3) having one ends allowed to communicate with a combustion chamber (6) by oppositely communicating a supply port (33) for the gas to be treated formed on the valve element (11) side and an exhaust port (35) for the treated gas, in this order, with supply and exhaust ports (16) formed on the distributor (10) side according to the rotation of the valve element (11). The apparatus also comprises an energizing means (44A) for the valve element supporting the valve element (11) in the state of being displaceable in the longitudinal direction to the distributor (10), and pressing the valve element (11) to the distributor (10) side in the non-acting state on an atmospheric chamber (13).

The invention discloses a radiation low-pressure environment simulation cabin, which comprises a protection frame and a simulation cabin. The inner side of the protection frame and the outer side of the simulation cabin are fixedly installed, and the simulation cabin comprises a heat preservation cabin body, a low-pressure cabin body, a ventilation hole plate, a circulating fan, a heating unit, a refrigerating unit, an evaporator, a vacuum unit and a temperature sensor. According to the radiation low-pressure environment simulation cabin, the refrigerating unit, the heating unit and the circulating fan are started to send the adjusted temperature to the position above the ventilation hole plate in the heat preservation cabin body through the air pipe, then the adjusted temperature is evenly sent into the heat preservation cabin body through the ventilation hole plate, and the adjusted air evenly radiates the six wall faces of the low-pressure cabin body under the flowing condition; the purpose of controlling and adjusting the temperature in the low-pressure cabin body is achieved, air in the heat preservation cabin body returns to the temperature adjusting section through the air pipe, circulation in the heat preservation cabin body is formed, meanwhile, the circularly flowing air can be dehumidified and dried at the position where the air passes through the evaporator, and dew condensation on the wall face of the low-pressure cabin body is further avoided.

A yarn of exfoliated graphite as a base material that is improved so as to have enriched flexibility free from any stick-out of exfoliated graphite at ordinary bending processing, thereby avoiding any partial loss of exfoliated graphite at twisting or braiding operation for preparing of a gland packing. Yarn (1) for gland packing is produced by filling the interior of tubular member (3) obtained by knitting or folding Inconel wire (2) of 0.1 mm diameter with fibrous exfoliated graphite (4) in the form of a fiber with a cross section set so as to exhibit an aspect ratio, being a quotient of width (h=w/t) divided by thickness (t), of 1 to 5.

The invention discloses a water pump having a good sealing effect. The water pump includes a pump body, a motor is arranged at the top of the pump body, a water inlet is arranged on one side of the pump body, and a water outlet is arranged on the other side of the pump body. First flanges are disposed on one side of the water inlet and one side of the water outlet, one side of each first flange isprovided with a second flange, one side of the second flange is provided with an external water pipe, the surface of one side of the first flange is provided with a sealing groove, the surface of oneside of the second flange is provided with a seal ring groove, a seal ring is disposed in the seal ring groove, and one side of the seal ring is provided with a sliding push plate. The top and the bottom of the inner wall of the seal ring groove are provided with sliding plates, and one side of the sliding push plate is provided with a telescopic rod. The sliding push plate is disposed on one side of the seal ring, a spring is disposed on one side of the sliding push plate, and through the tension action of the spring, the seal ring always presses the sealing groove to avoid loosening the seal ring.