CN219827290U - Hydraulic system for baler - Google Patents

Abstract

The present utility model provides a hydraulic system for a baler, the hydraulic system comprising: the hydraulic system comprises an oil tank, a hydraulic pump and a hydraulic cylinder, wherein the oil tank is communicated with the hydraulic pump through a first oil inlet pipeline, the hydraulic pump is communicated with the hydraulic cylinder through a second oil inlet pipeline, the hydraulic system further comprises an energy accumulator, and a main interface of the energy accumulator is communicated with the second oil inlet pipeline through a third oil inlet pipeline. According to the scheme, the energy accumulator is arranged, so that energy storage in a non-packaging period can be conveniently realized through the energy accumulator, the speed is conveniently increased during packaging, and the energy consumption can be reduced.

Description

Hydraulic system for baler

Technical Field

The utility model relates to the field of hydraulic pressure, in particular to a hydraulic system for a packer.

Background

The existing packer is used for packing and pressing aluminum scraps, a standby pump can be prepared for improving packing speed and meeting production requirements, and the standby pump can be opened when packing operation is carried out, and then the standby pump is closed after packing is completed. However, the use of the backup pump inevitably causes frequent switching of the currently used hydraulic pump and the backup pump, which reduces the service life of the pump, and on the other hand, frequent switching of the pump causes larger pressure impact, so that the pipeline vibrates greatly, thereby causing frequent damage and serious leakage of the pipeline. Furthermore, starting the backup pump inevitably increases power consumption.

Accordingly, there is a need to provide a hydraulic system for a baler that at least partially addresses the above-described problems.

Disclosure of Invention

The utility model provides a hydraulic system for a packer, which can improve packing speed, reduce energy consumption loss and avoid using a standby pump. The hydraulic system provided by the utility model comprises: the hydraulic system comprises an oil tank, a hydraulic pump and a hydraulic cylinder, wherein the oil tank is communicated with the hydraulic pump through a first oil inlet pipeline, the hydraulic pump is communicated with the hydraulic cylinder through a second oil inlet pipeline, the hydraulic system further comprises an energy accumulator, and a main interface of the energy accumulator is communicated with the second oil inlet pipeline through a third oil inlet pipeline.

Preferably, the hydraulic cylinder is in communication with the tank via an oil return line, on which a filter is arranged.

Preferably, at least a portion of the second inlet line adjacent to the hydraulic pump and/or the hydraulic cylinder is a hose.

Preferably, both end joints of the hose are provided with double cone seals.

Preferably, the accumulator is a bellows accumulator.

Preferably, a shut-off valve and/or a safety valve is provided on the energy store.

Preferably, the hydraulic cylinder includes a main push cylinder and a side push cylinder connected in parallel to the second oil feed line.

Preferably, the main push cylinder and the side push cylinder each have a respective control valve.

Preferably, a pre-filter is arranged on the first oil inlet pipeline.

Preferably, the volume of the accumulator is 30-50L.

According to the hydraulic system, the energy accumulator is additionally arranged on the main oil inlet pipeline, so that the energy accumulator can store energy in a non-compaction period conveniently. Therefore, when packing compaction operation is performed, the accumulator and the hydraulic pump can simultaneously supplement hydraulic energy to the hydraulic cylinder, so that packing speed can be improved. The scheme can reduce the use of the standby pump, avoid additionally increasing energy consumption, ensure that the pressure of the system is more stable, reduce the vibration of a pipeline and avoid the leakage of hydraulic oil caused by the damage of the pipeline.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present utility model, reference should be made to the preferred embodiments illustrated in the accompanying drawings. The same or similar reference numbers in the drawings refer to the same or similar parts. It will be appreciated by persons skilled in the art that the drawings are intended to schematically illustrate preferred embodiments of the utility model, and that the scope of the utility model is not limited in any way by the drawings, and that the various components are not drawn to scale.

FIG. 1 is a schematic illustration of a hydraulic system for a baler according to a preferred embodiment of the utility model;

FIG. 2 is a schematic illustration of a bellows accumulator in the hydraulic system shown in FIG. 1;

fig. 3 is a schematic partial cross-sectional view of a hose-end fitting in the hydraulic system shown in fig. 1.

Detailed Description

Hereinafter, a hydraulic system according to a preferred embodiment of the present utility model will be described in detail with reference to the accompanying drawings. It is to be understood that what follows is merely a preferred embodiment according to the present utility model, and that other ways of implementing the utility model will occur to those skilled in the art on the basis of the preferred embodiment and are intended to fall within the scope of the utility model.

It should be noted that the terms of direction and position in the present utility model should be understood as relative direction and position, not absolute direction and position.

A hydraulic system for a baler according to a preferred embodiment of the present utility model will be described in detail with reference to fig. 1.

As shown in fig. 1, the hydraulic system 100 includes a tank 10, a hydraulic pump 7, and a hydraulic cylinder. The oil tank 10 is communicated with the hydraulic pump 7 through a first oil inlet pipeline 13, and the hydraulic pump 7 is communicated with the inlet end of the hydraulic cylinder through a second oil inlet pipeline 4. The second oil feed line 4 may also be referred to as the main oil feed line. The hydraulic system 100 further comprises an accumulator 1, the main connection of the accumulator 1 being connected to the second oil feed line 4 in parallel with the hydraulic pump 7 via a third oil feed line 11, i.e. the accumulator 1 being in communication with the second oil feed line 4 via the third oil feed line 11.

Preferably, the accumulator 1 is a bellows accumulator. As shown in fig. 2, the bellows accumulator 1 is composed of a rubber bellows 16 with airtight spacers, an oil portion, and a housing 17. Rubber bladder 16 is typically filled with nitrogen. The housing 17 may be configured as a steel cylinder. The oil liquid around the rubber bag 16 is communicated with the third oil inlet pipeline 11 through a main interface. In general, when the external oil pressure is raised to be higher than the charging pressure of the rubber bellows 16, the oil enters the bellows accumulator 1, whereby the gas in the rubber bellows 16 is compressed, and the compression is stopped when the gas pressure compressed into the bellows is equal to the oil pressure. When the external pressure drops, the compressed gas expands, thereby pressing the oil into the circuit. The leather bag type energy accumulator has wide application range and strong universality and can reduce cost. The construction of a bellows accumulator is known in the art and will not be described in detail herein for the sake of brevity. It will be appreciated that other types of accumulators, such as spring accumulators or piston accumulators, etc., may also be used as desired by those skilled in the art.

Preferably, the accumulator 1 is provided with a shut-off valve. The provision of a shut-off valve may facilitate the operator to supply oil to the accumulator 1 as required, increasing the flexibility of operation.

In actual operation, when the packer is in the non-compaction stage, the stop valve of the accumulator 1 can be opened, the accumulator 1 is connected to the second oil inlet pipeline 4, and the hydraulic pump 7 is started, so that the hydraulic pump 7 can pump oil in the oil tank 10 into the accumulator 1, and the accumulator can store energy for standby. It will be appreciated that in this case, because of the non-compaction period, the valves controlling the cylinders need to be closed to avoid oil flow to the cylinders. When the packer performs the packing compaction operation, the accumulator 1 and the hydraulic pump 7 together can simultaneously supply a large amount of hydraulic oil to the hydraulic cylinders.

According to the hydraulic system 100 of the above-described aspect, by adding the accumulator 1 to the second oil feed line 4, that is, to the main oil feed line, the accumulator 1 can store energy in the non-compaction period. Thus, the accumulator 1 and the hydraulic pump 7 can simultaneously replenish hydraulic pressure to the hydraulic cylinders together at the time of packing operation, so that packing speed can be increased. The scheme can reduce the use of the standby pump, avoid additionally increasing energy consumption, ensure that the pressure of the system is more stable, reduce the vibration of a pipeline and avoid the leakage of hydraulic oil caused by the damage of the pipeline.

Preferably, the volume of the accumulator 1 is set to 30 to 50L. Further preferably, the volume of the accumulator 1 is 40L.

Preferably, the hydraulic system 100 comprises double hydraulic cylinders, namely a main push cylinder 2 and a side push cylinder 3, the main push cylinder 2 and the side push cylinder 3 being connected in parallel to the second oil feed line 4. The double hydraulic cylinders can improve packing speed and packing efficiency. Further preferably, the main push cylinder 2 is connected with a control valve 14 associated therewith, and the side push cylinder 3 is also connected with a control valve 15 associated therewith, so as to control the on-off of the oil passages to the main push cylinder 2 and the side push cylinder 3, respectively, as needed.

As shown in fig. 1, the outlet ends of the main push cylinder 2 and the side push cylinder 3 are communicated with an oil tank 10 through an oil return pipeline 5. Preferably, a filter 9 is arranged on the return line 5. This arrangement can improve the cleanliness of the hydraulic oil that flows back into the oil tank 10. The filtering accuracy of the filter 9 may be set to 10um, for example.

Preferably, the accumulator 1 is further provided with a safety valve, and the safety valve can improve the safety performance of the accumulator 1. For example, the safety valve may be opened when the accumulator 1 is serviced, and when the safety valve is opened, the accumulator 1 may discharge excess hydraulic oil through the oil drain line 12.

Since vibration near the hydraulic pump 7 is large, in order to avoid leakage of hydraulic oil due to damage of a pipe line thereat, it is preferable that a portion of the second oil feed pipe 4 near the hydraulic pump 7 is provided as a hose 6. Additionally or alternatively, a portion of the second oil feed line 4 adjacent to the hydraulic cylinder may also be provided as a hose. The hose can be set up to the rubber tube, for increase strength, the inboard of rubber tube can also set up the wire net. The arrangement of the hose can well absorb the generated vibration, and avoid the damage of the pipeline. The other pipe sections of the second oil feed line 4 may be provided as, for example, hard pipes mainly made of metal materials to improve line strength.

To improve the tightness of the pipe, the two end fittings of the hose 6 are preferably provided with a double cone seal 20. As shown in fig. 3, the double cone seal 20 includes a seal ring 19 provided in the joint, the seal ring 19 being provided between cone-shaped members engaged with each other. The double cone seal 20 further includes a fastening nut 18, and the fastening nut 18 is fastened to the outer circumference of the cone member, so that the stability of the joint can be improved. The scheme can improve the tightness of the joint of the hose and the hard pipe or the joint of the hose and the hydraulic pump and the hydraulic cylinder. Since the double cone seals are structures known in the art, they are not described in detail herein for brevity.

With continued reference to fig. 1, the first inlet line 13 is preferably further provided with a pre-filter 8, which may increase the cleanliness of the hydraulic oil.

The foregoing description of various embodiments of the utility model has been presented for the purpose of illustration to one of ordinary skill in the relevant art. It is not intended that the utility model be limited to the exact embodiment disclosed or as illustrated. As above, many alternatives and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the above teachings. Thus, while some alternative embodiments have been specifically described, those of ordinary skill in the art will understand or relatively easily develop other embodiments. The present utility model is intended to embrace all alternatives, modifications and variations of the present utility model described herein and other embodiments that fall within the spirit and scope of the utility model described above.

Claims (10)

1. A hydraulic system for a baler, characterized in that the hydraulic system (100) comprises: the hydraulic system comprises an oil tank (10), a hydraulic pump (7) and a hydraulic cylinder, wherein the oil tank is communicated with the hydraulic pump through a first oil inlet pipeline (13), the hydraulic pump (7) is communicated with the hydraulic cylinder through a second oil inlet pipeline (4), the hydraulic system further comprises an energy accumulator (1), and a main interface of the energy accumulator is communicated with the second oil inlet pipeline (4) through a third oil inlet pipeline (11).

2. Hydraulic system according to claim 1, characterized in that the hydraulic cylinder communicates with the tank (10) via an oil return line (5) on which a filter (9) is arranged.

3. Hydraulic system according to claim 1, characterized in that at least a part of the second oil feed line (4) near the hydraulic pump (7) and/or the hydraulic cylinder is a hose (6).

4. A hydraulic system according to claim 3, characterized in that both end fittings of the hose (6) are provided with double cone seals.

5. The hydraulic system of claim 1, wherein the accumulator is a bellows accumulator.

6. Hydraulic system according to claim 1, characterized in that the accumulator is provided with a shut-off valve and/or a safety valve.

7. Hydraulic system according to claim 1, characterized in that the hydraulic cylinder comprises a main push cylinder (2) and a side push cylinder (3), which are connected in parallel to the second oil feed line (4).

8. The hydraulic system of claim 7, wherein the main push cylinder and the side push cylinder each have a respective control valve.

9. Hydraulic system according to claim 1, characterized in that the first oil feed line (13) is provided with a pre-filter (8).

10. Hydraulic system according to claim 1, characterized in that the volume of the accumulator (1) is 30-50L.