JP6019828B2 - Hydraulic regeneration device - Google Patents

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 plurality of first relief valves, a hydraulic motor, and a generator driven by this hydraulic motor And a second relief valve connected in parallel with the hydraulic motor between the first relief valve and the tank.

  However, in the conventional hydraulic regenerative device described above, a large number of paths for connecting the plurality of first relief valves, the second relief valves, and the hydraulic motor to each other are bent or crossed, resulting in pressure loss. There is a problem that the energy recovery efficiency is poor due to the increase in size.

  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. 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 the pressure loss in the passage is small, the energy recovery efficiency is high, and the failure of the generator and the equipment where the generated power is used can be reliably prevented. An object of the present invention is to provide a hydraulic regenerative device that does not cause a function stop or a function deterioration of the entire device even if a failure or a failure of a device used for generated power occurs.

In order to solve the above problems, the hydraulic regeneration device of the present invention provides:
A plurality of first relief valves;
A straight intermediate pressure passage connected to the outlet side of the plurality of first relief valves;
A hydraulic motor to which hydraulic oil from the plurality of first relief valves is supplied via the intermediate pressure passage;
A generator driven by this hydraulic motor;
A second relief valve connected in parallel with the hydraulic motor between the intermediate pressure passage and the tank;
An on-off valve connected between the intermediate pressure passage and the hydraulic motor ,
The intermediate pressure passage is provided in a substantially hexahedral main manifold,
A main block is formed by the main manifold, the plurality of first relief valves, the second relief valve, and the on-off valve,
On the surface different from both end surfaces in the extending direction of the intermediate pressure passage of the main manifold,
A connection port for the plurality of first relief valves, the second relief valve, and the on-off valve is provided .

  According to the hydraulic regeneration device having the above configuration, the intermediate pressure passage to which the plurality of first relief valves, the second relief valves, and the on-off valves are connected is straight, so that the number of times the passage of the entire hydraulic regeneration device is bent or intersects The number of times to do is decreasing.

  Therefore, according to this hydraulic regeneration device, the pressure loss is reduced and the energy recovery efficiency is improved.

  If the generator cannot adjust the torque for some reason, the on-off valve is closed, the supply of oil to the hydraulic motor is stopped, and the hydraulic oil is discharged from the second relief valve. The 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 , connection ports for the plurality of first relief valves, the second relief valves, and the opening / closing valves are provided on a surface different from both end surfaces of the main manifold in the extending direction of the intermediate pressure passage. Therefore, piping for connecting the functional parts such as the plurality of first relief valves is not necessary, the cost of piping can be reduced, the number of assembly steps can be reduced, and there is no mistake in connecting piping. .

  In addition, since the connection ports are not provided on both end faces in the extending direction of the intermediate pressure passage of the main manifold and there are no functional parts such as the plurality of first relief valves on the end faces, Functional parts such as 1 relief valve do not obstruct the connection of the sub-manifold.

In one embodiment,
A sub-manifold having an intermediate pressure passage and an input port;
A sub-block is formed by this sub-manifold and the additional first relief valve,
The main manifold and sub-manifold are stacked to form a stack structure.
The intermediate pressure passage between the main manifold and sub-manifold forms a straight line,
A connection port for the additional first relief valve is provided on a surface different from the end surface in the extending direction of the intermediate pressure passage of the sub-manifold.

  According to the embodiment, the main manifold and the sub-manifold are stacked to form a stack structure, and the intermediate pressure passage between the main manifold and the sub-manifold forms a straight line, and the intermediate pressure passage of the sub-manifold Since the connection port of the additional first relief valve is provided on a surface different from the end surface in the extending direction, the sub-manifold can be easily added, and the first relief valve can be easily added. it can.

  In addition, piping for connecting functional parts such as the plurality of first relief valves and additional relief valves is no longer necessary, reducing piping costs, reducing assembly man-hours, and incorrect piping connections. Will also disappear.

  In addition, since the connection ports are not provided on both end faces in the extending direction of the intermediate pressure passage of the sub manifold and there are no functional parts on the end faces, the functional parts such as the plurality of first relief valves are sub Does not obstruct manifold connection.

  According to the present invention, the pressure loss in the passage is small, the energy recovery efficiency is high, and it is possible to reliably prevent the failure of the generator and the failure of the equipment where the generated power is used. It is possible to provide a hydraulic regenerative device that can prevent the function of the entire device from being stopped and the function from being deteriorated even if a failure occurs in the device where the generated power is used.

It is a circuit diagram of the hydraulic regeneration device of one embodiment of this invention. It is a perspective view of the main manifold and submanifold 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, the hydraulic regeneration device includes a main block 100, sub-blocks 110 and 120, a hydraulic motor 8, and a generator 10.

  The main 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 oil discharged from the first relief valves 1 and 2 is supplied to the straight intermediate pressure passage 15, the electromagnetic switching valve 5, and the output port. It is supplied to the hydraulic motor 8 via PM. The hydraulic motor 8 drives the generator 10.

On the other hand, the second relief valve 3 and the tank port T are connected between the intermediate pressure passage 15 and the tank 101 . 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 101 .

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

  On the other hand, the sub-blocks 110 and 120 have additional first relief valves 11 and 12, intermediate pressure passages 25 and 35, and input ports C and D, respectively. Additional first relief valves 11 and 12 are connected between the input ports C and D and the intermediate pressure passages 25 and 35, respectively.

  The intermediate pressure passage 15 of the main block 100 and the intermediate pressure passages 25 and 35 of the sub blocks 110 and 120 are connected in a straight line.

  As shown in FIG. 2, the main block 100 has a substantially hexahedral main manifold 105, and the sub blocks 110 and 120 have substantially hexahedral sub manifolds 115 and 125, respectively.

  The main manifold 105 and the sub-manifolds 115 and 125 have a stack structure and are integrally fixed by through bolts (not shown). Although not shown in FIG. 2, passages such as the intermediate pressure passages 15, 25, and 35 shown in FIG. 1 are formed in the main manifold 105 and the sub manifolds 115 and 125. , 25 and 35 form a straight line in the horizontal direction.

  In FIG. 2, A, B, C, and D are input ports, T is a tank port, PM is an output port, and N is a plug of the intermediate pressure passage 15.

  Although not shown in the drawing, the surface of the main manifold 105 and the sub-manifolds 115 and 125 is different from the end surface 201 in the extending direction of the straight intermediate pressure passages 15, 25, and 35. Connection ports for valves 1 and 2, second relief valve 3, electromagnetic switching valve 5 and additional relief valves 11 and 12 are provided.

  In FIG. 1, reference numeral 21 denotes a drain passage.

  According to the hydraulic regeneration device having the above configuration, the intermediate pressure passage 15 to which the plurality of first relief valves 1 and 2, the second relief valve 3 and the electromagnetic switching valve 5 of the main block 100 are connected is straight. The number of times the passage is bent and the number of intersections are reduced, and the intermediate pressure passages 15, 25 and 35 of the main block 100 and the sub-blocks 110 and 120 are in a straight line. The pressure loss is reduced.

  Therefore, according to this hydraulic regeneration device, the energy recovery efficiency is improved.

  Further, as shown in FIG. 2, the main manifold 105 and the sub-manifolds 115 and 125 are stacked to form a stack structure, and the straight intermediate pressure passages 15, 25, 35 (see FIG. 1) on a surface different from the end surface 201 in the extending direction, that is, the back surface, the plurality of first relief valves 1, 2, the second relief valve 3, the electromagnetic switching valve 5, and an additional Since the connection ports with the relief valves 11 and 12 are provided, and the connection ports are not provided at both end surfaces 201 in the extending direction of the intermediate pressure passages 15, 25 and 35, the plurality of first relief valves are provided. Piping for connecting functional parts such as 1 and 2 is unnecessary, the cost of piping can be reduced, the number of assembly steps can be reduced, and further, there is no mistake in connecting piping.

  In addition, the end faces in the extending direction of the straight intermediate pressure passages 15, 25, 35 of the main manifold 105 and the sub-manifolds 115, 125 do not have the connection port, and the first relief valves 1, 2, etc. Since the functional parts are not attached, these functional parts do not interfere with the further addition of the sub-manifold and can facilitate the further addition of the sub-manifold.

Further, in the above hydraulic regenerative device, 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 oil can be discharged from the second relief valve 3 to the tank 101 and the hydraulic motor 8 can be stopped.

  As a result, it is possible to prevent a serious failure of the generator 10 and to reliably prevent a failure of a device where the generated power is used, and even when a failure of the generator or a device where the generated power is used occurs. It is possible to prevent the function of the entire device from being stopped and the function from being lowered.

  In the above embodiment, the two sub blocks 110 and 120 are provided, but the number of sub blocks may be three or more, or there may be no main block but only a main block.

  In the above embodiment, the main block 100 is provided with two first relief valves 1 and 2, and each of the sub-blocks 110 and 120 is provided with one additional first relief valve 11 and 12. However, the number of the first relief valves provided in the main block and the sub block may be any number of 1 or more.

  Moreover, in the said embodiment, although the electromagnetic switching valve 3 was used as an on-off valve, you may use a manual switching valve.

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

1, 2, 11, 12 First relief valve 3 Second relief valve 5 Electromagnetic switching valve 8 Hydraulic motor 10 Generator 100 Main block 110, 120 Sub-block 105 Main manifold 115, 125 Sub-manifold

Claims (2)

A plurality of first relief valves (1, 2);
A straight intermediate pressure passage (15) connected to the outlet side of the plurality of first relief valves (1, 2);
A hydraulic motor (8) to which hydraulic oil from the plurality of first relief valves (1, 2) is supplied via the intermediate pressure passage (15);
A generator (10) driven by the hydraulic motor (8);
A second relief valve (3) connected in parallel with the hydraulic motor (8) between the intermediate pressure passage (15) and the tank ( 101 );
The intermediate pressure passage (15) and connected to on-off valve between the hydraulic motor (8) (5) and Bei give a,
The intermediate pressure passage (15) is provided in a main manifold (105) having a substantially hexahedron shape,
A main block (100) is formed by the main manifold (105), the plurality of first relief valves (1, 2), the second relief valve (3), and the on-off valve (5).
The plurality of first relief valves (1, 2) and the second relief valves (3) are arranged on a surface different from both end surfaces (201) in the extending direction of the intermediate pressure passage (15) of the main manifold (105). ) And an opening / closing valve (5) . The hydraulic regeneration device according to claim 1 ,
A sub-manifold (115, 125) having an intermediate pressure passage (25, 35) and an input port (C, D);
A sub block (110, 120) is formed by the sub manifold (115, 125) and the additional first relief valve (11, 12).
The main manifold (105) and the sub-manifolds (115, 125) are stacked to form a stack structure.
The intermediate pressure passages (15, 25, 35) between the main manifold (105) and the sub-manifolds (115, 125) form a straight line,
A connection port for the additional first relief valve (11, 12) is provided on a surface different from the end surface in the extending direction of the intermediate pressure passage (25, 35) of the sub-manifold (115, 125). A hydraulic regeneration device characterized by that.

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