CN214945449U

CN214945449U - Filtering system of oil tank of engineering machinery and engineering machinery with filtering system

Info

Publication number: CN214945449U
Application number: CN202121291078.5U
Authority: CN
Inventors: 贺电; 汪锋维
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-11-30
Anticipated expiration: 2031-06-09

Abstract

The utility model provides a filtration system of engineering machine tool's oil tank and engineering machine tool who has it, wherein, the filtration system of engineering machine tool's oil tank includes: a filter system of a work machine, comprising: the oil tank is of a hollow structure and forms a cavity; the oil pumping device is arranged on the oil tank and is provided with an oil suction port and an oil outlet, and the oil suction port is positioned in the cavity of the oil tank; the driving device is used for driving the oil pumping device; the filtering device is arranged on the oil tank and is at least partially positioned in the oil tank; and one end of the oil outlet pipeline is connected with the filtering device, and the other end of the oil outlet pipeline is communicated with the oil outlet. The technical scheme of the utility model the engineering machine tool's among the prior art defect that hydraulic pressure filtration system filter effect is poor has been solved.

Description

Filtering system of oil tank of engineering machinery and engineering machinery with filtering system

Technical Field

The utility model relates to an engineering equipment technical field, concretely relates to filtration system of engineering machine's oil tank and engineering machine who has it.

Background

In the operation process of engineering machinery such as a concrete pump truck and the like, a hydraulic system is an important system for driving the hydraulic system to normally work, and the guarantee of the cleanliness of hydraulic oil is an important condition for normal work of various working elements in the hydraulic system. In the existing hydraulic system, impurities of oil in a filter filtering system are added on an oil return path of the hydraulic system, and an oil absorption filter is added on the oil inlet path of some important elements to ensure that the cleanliness of the oil entering the system meets working requirements.

For the oil return filter, although the oil in the hydraulic system can be always in a filtering state in the circulation process, the oil can reach the filter through all elements of the hydraulic system to generate a filtering effect. For the oil absorption filter, the difficulty of oil absorption of the system can be increased by adding the high-precision filter on an oil inlet path, the oil pump is vacuumed under severe conditions, cavities and cavitation are generated, and the service life of each element in the system is greatly reduced. Further, for the oil suction filter and the oil return filter, the filtering efficiency depends on the flow during the operation of the hydraulic system, and a hydraulic oil filtering condition with stable flow cannot be formed.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the poor defect of engineering machine tool's hydraulic pressure filtration system filter effect among the prior art to a filtration system of engineering machine tool's oil tank and engineering machine tool who has it is provided.

In order to solve the above problem, the utility model provides an engineering machine's filtration system, include: the oil tank is of a hollow structure and forms a cavity; the oil pumping device is arranged on the oil tank and is provided with an oil suction port and an oil outlet, and the oil suction port is positioned in the cavity of the oil tank; the driving device is used for driving the oil pumping device; the filtering device is arranged on the oil tank and is at least partially positioned in the oil tank; and one end of the oil outlet pipeline is connected with the filtering device, and the other end of the oil outlet pipeline is communicated with the oil outlet.

Optionally, the driving device comprises an engine or an electric machine of the work machine.

Optionally, the filtering device is a return oil filter of the oil tank.

Optionally, a one-way circulation device is arranged on the oil outlet pipeline and located between the oil outlet and the oil return filter.

Optionally, the oil intake and the oil outlet end of the filter device are located on opposite sides of the oil tank.

Optionally, the driving device further comprises an oil pump and a gear motor, the oil pumping device comprises a centrifugal pump, wherein a main shaft of the oil pump is driven by the engine to rotate, the oil pump and the gear motor are connected through a pipeline, the main shaft of the gear motor is connected with the main shaft of the centrifugal pump, and the oil suction port and the oil outlet are arranged on the centrifugal pump.

Optionally, a first connecting flange and a second connecting flange are arranged on two sides of the centrifugal pump, the first connecting flange is suitable for being connected with the side wall of the oil tank, and the second connecting flange is suitable for being connected with the gear motor.

Optionally, the driving device further comprises a power takeoff, the oil pumping device comprises a centrifugal pump, the power takeoff is connected between the engine and the centrifugal pump, and the oil suction port and the oil outlet are arranged on the centrifugal pump, or the oil pumping device comprises a gear pump, a main shaft of the gear pump is driven by the engine to rotate, and the oil suction port and the oil outlet are arranged on the gear pump.

Optionally, the oil suction port is disposed near the oil outlet end of the filtering device, the filtering system further includes an oil suction pipeline, a first end of the oil suction pipeline is connected to the oil suction port, a second end of the oil suction pipeline is located in the oil tank, and the second end of the oil suction pipeline and the oil outlet end of the filtering device are located on opposite sides of the oil tank.

The utility model also provides an engineering machine tool, including foretell filtration system.

The utility model has the advantages of it is following:

utilize the technical scheme of the utility model, oil pumping unit and oil outlet pipeline form independent hydraulic oil filtration system. Meanwhile, the oil pumping device is driven by the driving device, so that the oil pumping device can filter hydraulic oil in the oil tank in real time. Furthermore, the rotating speed of the oil pumping device is not related to the working condition of the hydraulic main system, so that the flow of the oil pumping device is in a stable state, and the filtering effect is good. Consequently the technical scheme of the utility model the engineering machine tool's among the prior art defect that hydraulic pressure filtration system filter effect is poor has been solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 shows a schematic partial cross-sectional view of a filtration system according to an embodiment of the present invention;

FIG. 2 shows a schematic connection diagram of the filtration system of FIG. 1; and

fig. 3 shows a schematic connection diagram of a filtration system according to another embodiment of the present invention.

Description of reference numerals:

15. a centrifugal pump; 17. a gear pump; 20. an oil suction pipeline; 30. an oil outlet pipeline; 40. a filtration device; 50. a one-way flow device; 100. an oil tank; 200. a drive device.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example one

As shown in fig. 1 to 2, a filtering system for an oil tank of a construction machine according to a first embodiment includes an oil tank 100, an oil pumping device, a driving device 200, a filtering device 40, and an oil outlet line 30. The oil tank 100 is a hollow structure and forms a cavity. The oil pumping device is installed on the oil tank 100, and the oil pumping device has an oil suction port and an oil outlet, and the oil suction port is located in the cavity of the oil tank 100. The driving device 200 is used for driving the oil pumping device. The filter device 40 is mounted on the tank and is at least partially located within the tank 100. One end of the oil outlet pipeline 30 is connected with the filtering device 40, and the other end of the oil outlet pipeline 30 is communicated with the oil outlet.

And preferably, the driving device 200 includes an engine of the construction machine. In other embodiments of the present application, the driving device 200 may not be an engine, but may be a motor. In other embodiments of the present application, the driving device 200 is not limited to the engine and the motor, but may be other conventional driving mechanisms.

By using the technical scheme of the embodiment, the oil pumping device and the oil outlet pipeline 30 form an independent hydraulic oil filtering system. Meanwhile, the oil pumping device is driven by an engine of the engineering machinery, so that the oil pumping device can pump oil no matter the engineering machinery is in a running state or a working state, and the hydraulic oil in the oil tank can be filtered in real time. Furthermore, the rotating speed of the oil pumping device is not related to the working condition of the hydraulic main system, so that the flow of the oil pumping device is in a stable state, and the filtering effect is good. Therefore, the technical scheme of the embodiment overcomes the defect that the hydraulic filtering system of the engineering machinery in the prior art is poor in filtering effect.

The oil pickup device described above refers to a working machine that can pump hydraulic oil from the oil tank 100 to the oil outlet line 30.

It should be noted that in the present embodiment, the oil suction opening is directly installed on the sidewall of the oil tank 100 and is located in the cavity of the oil tank 100. Of course, in some embodiments, not shown, an oil suction line 20 may also be provided on the oil suction opening.

The filtering device 40 may be disposed on the oil suction line 20 or on the oil outlet line 30, and the filtering devices may be disposed on both the oil suction line 20 and the oil outlet line 30.

As shown in fig. 1, in the technical solution of the present embodiment. A second end of the oil outlet line 30 is connected to an oil return filter of the oil tank 100. Specifically, the hydraulic oil in the oil tank 100 is introduced from the oil suction line 20 and discharged from the oil discharge line 30 by the oil pumping device, and is connected to the oil return filter. That is, in the present embodiment, the return oil filter of the hydraulic system forms the filter device 40. Of course, it is also possible to provide a single filter on the outlet line 30 as the filter device 40, i.e. the filter device 40 and the return oil filter of the hydraulic system are two separate filter structures.

Preferably, the flowline 30 is provided with a one-way flow-through device 50. Specifically, the one-way flow device 50 allows the hydraulic oil in the oil outlet line 30 to flow only to the oil return filter, so as to prevent the hydraulic oil from flowing back to the oil pumping device when the hydraulic system returns oil. Further, the one-way flow device is a check valve.

As shown in fig. 1, in the solution of the present embodiment, in order to prevent the hydraulic oil passing through the filtering device 40 from being drawn back by the oil pumping device, it is necessary to set the distance between the oil suction port of the oil pumping device and the oil outlet end of the filtering device 40 as far as possible. Preferably, the oil suction port and the oil outlet end of the filter device 40 are disposed at two opposite sides of the oil tank 100, so that the distance between the two is as far as possible.

Further, in order to prevent the hydraulic oil passing through the filter device 40 from being drawn back by the oil pickup device, the second end of the oil suction line 20 may be provided long, so that although the oil suction port is provided near the oil outlet end of the filter device 40, the second end of the oil suction line 20 and the oil outlet end of the filter device 40 may be located on opposite sides of the oil tank 100 (e.g., on opposite sides of the oil tank 100 in the up-down direction).

As shown in fig. 2, in the solution of the present embodiment, the driving device 200 further includes an oil pump and a gear motor, and the oil pumping device includes a centrifugal pump 15. The main shaft of the oil pump is driven by an engine to rotate, the oil pump is connected with the gear motor through a pipeline, the main shaft of the gear motor is connected with the main shaft of the centrifugal pump 15, and the oil suction port and the oil outlet are arranged on the centrifugal pump 15. Specifically, a main shaft of the oil pump is driven by an engine of the construction machine and outputs hydraulic oil, the hydraulic oil drives a main shaft of the gear motor to rotate through a pipeline, and the main shaft of the gear motor drives a main shaft of the centrifugal pump 15 to rotate when rotating, so that the centrifugal pump 15 is driven to pump oil.

In the above structure, no matter the engineering vehicle is in a running state or a working state, the engine of the engineering vehicle can drive the oil pump to operate, and further drive the centrifugal pump to pump oil, so that the hydraulic oil in the oil tank 100 is filtered in real time through the filtering device 40. Meanwhile, the rotating speed of the main shaft of the centrifugal pump 15 is not related to a hydraulic system, so that the flow of pump oil is in a stable state, and the filtering effect is good.

In the solution of this embodiment, the centrifugal pump 15 is provided with a first connecting flange and a second connecting flange on two sides, the first connecting flange is suitable for being connected with the side wall of the oil tank 100, and the second connecting flange is suitable for being connected with the gear motor. In particular, the first connecting flange allows the centrifugal pump 15 to be mounted directly on the tank wall and the gear motor to be mounted directly on the second connecting flange. Thus, a mounting bracket is not needed, and the assembly of all structures is simplified.

Preferably, the oil suction line 20 is disposed at the bottom of the oil tank 100 and the oil discharge line 30 is disposed at the top of the oil tank 100 in this embodiment.

Example two

The filtering system of the second embodiment is different from the first embodiment in that the oil pump is a supplementary oil pump of the main oil pump. Specifically, the oil supply pump is driven by the main shaft of the main oil pump, and therefore in the second embodiment, when the engineering machine is in the running state, the main oil pump of the hydraulic system does not work, and therefore the oil supply pump does not work, and the centrifugal pump 15 does not pump oil. When the engineering machinery is in a working state, the main oil pump of the hydraulic system works to further drive the oil supplementing pump to work, so that the centrifugal pump 15 works to filter hydraulic oil in the oil tank 100.

Example three:

compared with the first embodiment, the filtering system of the third embodiment is different in that the driving device 200 further includes a power takeoff, the oil pumping device includes a centrifugal pump 15, the power takeoff is connected between the engine and the centrifugal pump 15, and the oil suction port and the oil outlet are disposed on the centrifugal pump 15. Specifically, the power takeoff can directly distribute a part of the power of the engine to the centrifugal pump 15, and therefore, in the third embodiment, it is not necessary to provide an oil pump and a gear motor, thereby simplifying the structure.

Example four

As shown in fig. 3, the filtering system of the fourth embodiment is different from the first embodiment in that the oil pumping device includes a gear pump 17, a main shaft of the gear pump 17 is driven by the engine to rotate, and an oil suction port and an oil discharge port are provided on the gear pump 17. Specifically, the gear pump 17 may be directly connected to the engine, so that the centrifugal pump 15 structure is omitted, and the circuit can be further simplified.

The application also provides engineering machinery, and the engineering machinery comprises the filtering system of the oil tank. The working machine may be a variety of equipment, such as an excavator, a pump truck, a crane, etc.

According to the structure, the filtering system has the following advantages:

1. because the hydraulic oil tank is always in a self-circulation filtering state, an oil absorption filter does not need to be arranged in the system, and the working conditions that an oil pump sucks air and generates cavities and cavitation are reduced;

2. the independent oil return enables most of the oil in the system to reach the filter for filtering without passing through each element of the hydraulic system. The risks of sticking, abrasion and oil leakage caused by hydraulic oil pollution of each element in the system are reduced, and the reliability of the system is improved;

3. the oil pumping device is directly driven by the engine, and the rotating speed of the oil pumping device is not related to the working condition of the main system, so that the flow of pump oil is in a stable state, and the operation process of the main system is irrelevant to the filtering efficiency of the independent system;

4. in the standby process of the system, although no hydraulic oil circulates, the independent system still ensures that the independent circulating system always works as long as the engine is started.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A filter system of a construction machine, comprising:

a fuel tank (100) which is a hollow structure and forms a cavity;

the oil pumping device is arranged on the oil tank (100) and is provided with an oil suction port and an oil outlet, and the oil suction port is positioned in a cavity of the oil tank (100);

the driving device (200) is used for driving the oil pumping device;

a filter device (40) mounted on the tank (100) and located at least partially within the tank (100);

and one end of the oil outlet pipeline (30) is connected with the filtering device (40), and the other end of the oil outlet pipeline (30) is communicated with the oil outlet.

2. A filter system according to claim 1, characterised in that the drive means (200) comprises an engine or an electric motor of the working machine.

3. A filtering system according to claim 1 or 2, wherein the filtering means (40) is a return oil filter of the oil tank (100).

4. A filtering system according to claim 3, wherein a one-way flow-through device (50) is arranged on the oil outlet line (30), the one-way flow-through device (50) being located between the oil outlet and the oil return filter.

5. A filtering system according to claim 1 or 2, wherein the suction opening and the outlet end of the filtering means (40) are located on opposite sides of the tank (100).

6. The filtration system according to claim 2, wherein the driving device (200) further comprises an oil pump and a gear motor, the oil pumping device comprises a centrifugal pump (15), wherein a main shaft of the oil pump is driven by the engine to rotate, the oil pump and the gear motor are connected through a pipeline, the main shaft of the gear motor is connected with the main shaft of the centrifugal pump (15), and the oil suction port and the oil outlet are arranged on the centrifugal pump (15).

7. A filter system according to claim 6, wherein the centrifugal pump (15) is provided on both sides with a first connecting flange adapted to be connected with a side wall of a tank (100) and with a second connecting flange adapted to be connected with the gear motor.

8. A filter system according to claim 2, wherein the drive means (200) further comprises a power take-off, the oil well pumping means comprising a centrifugal pump (15), the power take-off being connected between the engine and the centrifugal pump (15), the oil intake and the oil outlet being provided on the centrifugal pump (15), or,

the oil pumping device comprises a gear pump (17), a main shaft of the gear pump (17) is driven by the engine to rotate, and the oil suction port and the oil outlet are arranged on the gear pump (17).

9. The filtering system according to claim 1, wherein the suction opening is arranged close to the outlet end of the filtering device (40), the filtering system further comprising a suction line (20), a first end of the suction line (20) being connected to the suction opening, a second end of the suction line (20) being located inside the oil tank (100), the second end of the suction line (20) and the outlet end of the filtering device (40) being located on opposite sides of the oil tank (100).

10. A working machine, characterized in that it comprises a filter system according to any one of claims 1 to 9.