JP2014013045A - Hydraulic recovery apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic recovery apparatus which surely prevents malfunction of a generator and malfunction of an apparatus as a use destination of generated power, and which causes neither function breakdown nor function deterioration of the entirety of the apparatus even upon occurrence of the malfunction of the generator and the malfunction of the apparatus as the use destination of the generated power.SOLUTION: A hydraulic motor 8 and a second relief valve 3 are coupled in parallel between first relief valves 1 and 2 and a tank 11. A solenoid selector valve 5 is coupled to between the first relief valves 1 and 2 and the hydraulic motor 8. The hydraulic motor 8 drives a generator 10. Upon failure in torque adjustment in the generator 10, the solenoid selector valve 5 is closed to stop oil supply to the hydraulic motor 8, and the oil is discharged from a second relief valve 3 into the tank 11, and the hydraulic motor 8 is stopped.

Description

  The present invention relates to a hydraulic regenerative apparatus that generates power by effectively using hydraulic energy.

  Conventionally, as this type of hydraulic regenerative device, as described in JP 2012-82953 A (Patent Document 1), a first relief valve, a hydraulic motor, a generator driven by the hydraulic motor, Some have a second relief valve connected in parallel with the hydraulic motor between the first relief valve and the tank.

  This hydraulic regenerative device has an advantage that it can generate electric power by collecting hydraulic oil energy in a hydraulic motor with a simple configuration.

  However, in the above-described conventional hydraulic regenerative device, if the generator cannot adjust the torque for any reason, the amount of oil supplied to the hydraulic motor may not be suppressed, which is the worst case. In some cases, a serious failure may occur in the generator, or a device to which the generated power is used may be damaged, which may cause the entire device to stop functioning or deteriorate.

JP 2012-82953 A

  Therefore, the problem of the present invention is that it is possible to reliably prevent a failure of a generator and a device at a destination of generated power, and even if a failure of a generator or a device at a destination of generated power occurs, the entire apparatus It is an object of the present invention to provide a hydraulic regenerative device that does not cause a function stop or a function deterioration.

In order to solve the above problems, the hydraulic regeneration device of the present invention provides:
A first relief valve;
A hydraulic motor to which hydraulic oil is supplied from the first relief valve;
A generator driven by this hydraulic motor;
A second relief valve connected in parallel with the hydraulic motor between the first relief valve and the tank;
An on-off valve connected between the first relief valve and the hydraulic motor is provided.

  According to the hydraulic regeneration device having the above configuration, when the generator cannot adjust the torque, the on-off valve is closed, the supply of oil to the hydraulic motor is stopped, and the oil is discharged from the second relief valve. Thus, the hydraulic motor can be stopped.

  As a result, it is possible to prevent a serious failure of the generator, to surely prevent a failure of the device where the generated power is used, and even if a failure of the generator or a device where the generated power is used occurs It is possible to prevent the entire function from being stopped or lowered.

  According to the present invention, it is possible to prevent a serious failure of the generator, to reliably prevent a failure of a device where the generated power is used, and to cause a failure of the generator or a device where the generated power is used. However, it is possible to prevent the function of the entire apparatus from being stopped and the function from being lowered.

It is a circuit diagram of the hydraulic regeneration device of one embodiment of this invention.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  As shown in FIG. 1, this hydraulic regeneration device includes a block 100, a hydraulic motor 8, and a generator 10. The block 100 includes input ports A and B, a tank port T, an output port PM, first relief valves 1 and 2, a second relief valve 3, and an electromagnetic switching valve 5 as an example of an on-off valve. Have.

  The first relief valves 1 and 2 are connected to the input ports A and B, and the hydraulic fluid discharged from the first relief valves 1 and 2 is passed through the intermediate pressure passage 6, the electromagnetic switching valve 5, and the output port PM. To the hydraulic motor 8. The hydraulic motor 8 drives the generator 10.

  On the other hand, a second relief valve 3 and a tank port T are connected between the intermediate pressure passage 6 and the tank 11. Therefore, the second relief valve 3 is connected in parallel with the electromagnetic switching valve 5 and the hydraulic motor 8 between the first relief valves 1 and 2 and the tank 11.

  The set pressure of the second relief valve 3 is set lower than the set pressure of the first relief valves 1 and 2.

  In the hydraulic regenerative device having the above configuration, when the torque of the generator 10 cannot be adjusted for any reason, the electromagnetic switching valve 5 is immediately closed, and the supply of hydraulic oil to the hydraulic motor 8 is stopped. The hydraulic oil is discharged from the second relief valve 3 to the tank 11 and the hydraulic motor 8 is stopped.

  Thereby, the serious failure of the generator 10 can be prevented, and the failure of the apparatus of the use place of generated electric power can be prevented reliably.

  In the above embodiment, the electromagnetic switching valve 5 is used as the on-off valve, but a manual switching valve may be used.

  The elements such as the first relief valves 1 and 2 of the block 100 may be connected by a manifold or may be connected by piping.

1, 2 1st relief valve 3 2nd relief valve 5 Electromagnetic switching valve 8 Hydraulic motor 10 Generator 100 Block

Claims (1)

A first relief valve (1, 2);
A hydraulic motor (8) to which hydraulic oil is supplied from the first relief valves (1, 2);
A generator (10) driven by the hydraulic motor (8);
A second relief valve (3) connected in parallel with the hydraulic motor (8) between the first relief valve (1, 2) and the tank (11);
A hydraulic regenerative device comprising an on-off valve (5) connected between the first relief valve (1, 2) and the hydraulic motor (8).

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