Eagle Industry Co., Ltd. Patente

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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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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 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.

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 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.

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.

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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 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.

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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.

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.

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.

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.

To provide a seal device with simple pressure control.A seal device 1 includes a tubular body 10 through which a rotating shaft 2 extends, and a seal ring 25 attached to the tubular body 10 and sealing between the tubular body 10 and the rotating shaft 2, the seal device having at least two seal spaces S5, S6 with the seal ring 25 interposed therebetween. A sealing fluid OL3 is introduced into a seal space S5 from outside, and the seal space S5 and a seal space S6 are in communication with each other via a flow passage 6. The seal device 1 further includes a pressure regulator 30 disposed in the flow passage 6 and configured to regulate pressure of the sealing fluid introduced into the seal space S5 and introduce the sealing fluid into the seal space S6.

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Provided are sliding components capable of maintaining low friction properties. Sliding components includes a pair of sliding rings 10 and 20 having sliding surfaces 11 and 21 which rotate relative to each other to define an outer radial space S1 and an inner radial space S2, the sliding surface 11 is provided with a circumferential groove 14 extending in a circumferential direction and a recess 18 communicating with the circumferential groove 14, and the circumferential groove 14 has a throttled opening portion AA in close vicinity to the sliding surface 11.

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A solenoid with high heat dissipation properties is provided. In a solenoid 1 including a cylindrical case 30 and a coil 39 disposed inside the case 30 and having an outer periphery portion covered by a resin molded portion 35, at least a part of an outer peripheral surface of the resin molded portion 35 is formed in an uneven shape having at least one convex portion.

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