Eagle Industry Co., Ltd. Patente

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There is provided a sliding component that can prevent a sliding ring from falling off. A sliding component U that is disposed at a relative rotation position between a housing 4 and a shaft 1 inserted into the housing 4 includes a sliding ring 10, a sleeve 11 that includes a support piece 11a for supporting the sliding ring 10 in a radial direction, a biasing member 13 that biases the sliding ring 10 to one side in an axial direction, and holding member 15 that is fixed to the sleeve 11 and holds the biasing member 13 in a state in which the biasing member 13 is contracted in the axial direction.

To provide a differential pressure switching valve that can switch between flow paths at an appropriate timing. A differential pressure switching valve includes a low-pressure inlet port P3, a high-pressure outlet port P4, a first port P1, and a second port P2. Differential pressure on-off valves 2, 3 are provided in a flow path between the low-pressure inlet port P3 and the first port P1 and in a flow path between the low-pressure inlet port P3 and the second port P2, respectively. The high-pressure outlet port P4 is in communication with the first port P1 and the second port P2, and differential pressure on-off valves 4, 5 are provided by which flow paths for an outflow to the high-pressure outlet port P4 are switched depending on the pressures at the first port P1 and the second port P2.

To provide a sliding component having high floating effect.A sliding component 3 is disposed between a housing 2 and a shaft 1 extending through the housing 2, and has a pair of sliding surfaces 11, 21 that rotate relative to each other. At least one of the sliding surfaces 11 is provided with a dynamic pressure generating groove 13 having an introduction portion 14 on a radially outer side that communicates with an outer space S1 and an introduction portion 15 on a radially inner side that communicates with an inner space S2, and a tip portion 17B where both the introduction portions 14, 15 meet on a relative rotation downstream side. The dynamic pressure generating groove 13 is shallower on a side of the tip portion 17B than on a side of the introduction portion 14 and a side of the introduction portion 15.

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There is provided a sliding component that can reliably introduce a fluid into a dynamic pressure generating groove. There is provided a sliding component formed by a pair of sliding rings 10 and 20 having sliding surfaces 11 and 12 which are rotated relative to each other and which defines a radially outer space S1 and a radially inner space S2. At least one sliding surface 11 is provided with a dynamic pressure generating groove 12 that extends in a circumferential direction, and a deep groove 14 which extends in the circumferential direction and of which a circumferential end portion 14a on a relative rotation downstream side communicates with a relative rotation upstream end portion 12b of the dynamic pressure generating grooves 12.

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To provide a shaft sealing device having high followability of a case with respect to a rotating shaft. A shaft sealing device 1 includes: a tube 2 through which a rotating shaft 3 extends; a case 4 having an elastic portion 40 which has elasticity and through which the rotating shaft 3 extends; a rubber hose 7 externally fitted across the case 4; a fastening member 8 configured to fasten the rubber hose 7 to the case 4; and a seal device 5, 6 configured to seal between the rotating shaft 3 and the case 4. The case 4 is disposed axially outward of an end of the tube 2 in an axial direction, and a rigid member 41 having higher hardness than the elastic portion 40 is installed on a radially inner side of the fastening member 8 and axially outward of the end of the tube 2 in the axial direction.

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A rotary electric machine that can be cooled while maintaining a rotational force is provided. In a rotary electric machine 1 including: a housing 10; a rotary shaft 20 inserted through the housing 10; a stator 40 connected to the housing 10 side; and a rotor 30 connected to the rotary shaft 20 side, the stator 40 has a plurality of teeth 41a arranged in a circumferential direction and coils 43 wound on the teeth 41a, and a gap 48 in an axial direction is provided between adjoining two of the coils 43 in a circumferential direction, and the rotary electric machine 1 further includes a nozzle 84 configured for spraying a refrigerant toward the gap 48.

To provide a mechanical seal that is capable of stabilizing surface pressure.One seal ring 10 and a case 20 are in contact with each other in an axial direction. A gasket 30 has a radial-direction extending portion 32 located between the one seal ring 10 and the case 20 in the axial direction. The radial-direction extending portion 32 is disposed in a recessed portion 14 that is formed so as to be recessed in the axial direction from at least one of the one seal ring 10 and the case 20. An axial gap Al is formed between the radial-direction extending portion 32 and at least one of the one seal ring 10 and the case 20.

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There is provided a fluid machine state monitoring apparatus capable of frequently performing diagnosis. A fluid machine state monitoring apparatus 102 which is used for a fluid pressure circuit 101 including a pump 2, a pressure accumulator 5 and a supplied circuit 8 to which a fluid is supplied from the pump 2 and the pressure accumulator 5, and which is configured to diagnose a state of the pressure accumulator 5 includes: a pressure detection device 6 configured for detecting a pressure of a working fluid in the fluid pressure circuit 101; a timer 10a; and a determination device 10 configured for detecting the pressure of the working fluid at least two arbitrary time points using the pressure detection device 6 and the timer 10a, and determining the state of the pressure accumulator 5.

There is provided a fluid machine state monitoring apparatus capable of accurately diagnosing a state. A fluid machine state monitoring apparatus 102 which is used for a fluid pressure circuit 101 including a pump 2 and a pressure accumulator 5, and which is configured to diagnose a state of the pressure accumulator 5 includes: pressure detection device 6 configured for detecting a pressure of a working fluid in the fluid pressure circuit 101; and output device 10 configured for outputting a determination result at a predetermined frequency among detection results from the pressure detection device 6.

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There is provided a seal ring capable of maintaining parallelism between sliding surfaces. A seal ring includes a sliding surface 3a that slides relative to one of a shaft 1 and a housing 2 through which the shaft 1 is inserted; and an installation surface 3b that intersects the sliding surface 3a and that is installed on remaining one of the shaft 1 and the housing 2. The seal ring partitions one space H, which is located on a side opposite to a side on which the sliding surface 3a intersects the installation surface 3b, off from another space L disposed on the side on which the sliding surface 3a intersects the installation surface 3b. The sliding surface 3a is provided with a dynamic pressure generation mechanism 36 communicating with the one space H and including a dynamic pressure generation portion 39b, and a fluid recovery mechanism 37 disposed between the dynamic pressure generation portion 39b and the one space H.

There is provided a seal ring capable of maintaining parallelism between sliding surfaces. A seal ring 3 includes a sliding surface 3a that rotates and slides relative to one of a shaft 1 and a housing 2 through which the shaft 1 is inserted; and an installation surface 3b that intersects the sliding surface 3a and that is installed on remaining one of the shaft 1 and the housing 2. The seal ring 3 partitions one space H, which is located on a side opposite to a side on which the sliding surface 3a intersects the installation surface 3b, off from another space L disposed on the side on which the sliding surface 3a intersects the installation surface 3b. The sliding surface 3a includes a dynamic pressure generation mechanism 36 communicating with the one space H and including a dynamic pressure generation portion 39b, and a fluid recovery mechanism 37 that is disposed closer to the one space H side than the dynamic pressure generation portion 39b to communicate with a relative rotation downstream side of the dynamic pressure generation mechanism 36, and that does not communicate with the one space H side.

A fluid pressure circuit in which efficiency of pressure accumulation is high is provided. A fluid pressure circuit 100 includes a plurality of drive portions 5, 6, 7 connected to a single load 4, and an accumulator 10 configured for accumulating pressure. The drive portions 5, 6, 7 include at least one drive portion 7 of which a return flow passage 23-2 branches and is connected to the accumulator 10.

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Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

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A seal ring capable of maintaining parallelism between sliding surfaces is provided. The seal ring includes a sliding surface 3a that rotates and slides relative to a shaft 1 or a housing 2 through which the shaft 1 is inserted; and an installation surface 3b installed on the other of the shaft 1 and the housing 2. The seal ring partitions a first space H, which is located on a side opposite to a side on which the sliding surface 3a intersects the installation surface 3b, off from a second space L disposed on the side on which the sliding surface 3a intersects the installation surface 3b. The sliding surface 3a is provided with a dynamic pressure generation mechanism 36 communicating with the first space H and including a dynamic pressure generation portion 36b, and a fluid recovery mechanism 37 communicating with the first space H and disposed closer to the first space H side than the dynamic pressure generation portion 36b.

A seal ring capable of maintaining parallelism between sliding surfaces is provided. The seal ring includes a sliding surface 3a that rotates and slides relative to one of a shaft 1 or a housing 2 through which the shaft 1 is inserted; and an installation surface 3b installed on the other of the shaft 1 and the housing 2. The seal ring partitions one space H, which is located on a side opposite to a side on which the sliding surface 3a intersects the installation surface 3b, off from the other space L disposed on the side on which the sliding surface 3a intersects the installation surface 3b. The seal ring 3 partitions the one space H positioned opposite to the installation surface 3b off from the other space L positioned on the installation surface 3b side. The sliding surface 3a is provided with a dynamic pressure generation mechanism 36 communicating with the one space H and including a dynamic pressure generation portion 39b, and a fluid recovery mechanism 37 disposed closer to the one space H side than the dynamic pressure generation portion 39b and communicating with a relative rotation upstream side of the dynamic pressure generation mechanism 36.