CN213270097U - Fuel system for engine of hydraulic machine and hydraulic machine comprising same - Google Patents

Abstract

The utility model relates to a hydraulic machine that is used for the fuel oil system of hydraulic machine's engine (9) and includes this fuel oil system, hydraulic machine includes the hydraulic pump. The fuel system comprises a fuel pump arranged on the engine body of the engine, a filter (1) arranged in a pump chamber where a hydraulic pump (8) is located, a fuel pipeline (3) connected with the fuel pump and the filter, and a second support (5) arranged on the hydraulic pump (8) for fixing a first support (4) of the fuel pipeline and arranged on the engine body of the engine (9) for fixing the fuel pipeline. The utility model discloses a set up first support on the hydraulic pump and set up the second support with fixed fuel pipeline on the engine for fuel pipeline extends smoothly and preferably roughly horizontally, has avoided fuel pipeline overlength, loss of pressure among the prior art big and be difficult to the problem of installation and maintenance.

Description

Fuel system for engine of hydraulic machine and hydraulic machine comprising same

Technical Field

The utility model relates to a hydraulic machine, more specifically relate to the fuel oil system of engine among hydraulic machine.

Background

A hydraulic pump is generally disposed in a work machine such as a loader, a bulldozer, an excavator, or the like. The hydraulic pump is actuated by the engine to drive the actuator. The fuel system is an important component of the engine and is used for supplying fuel for the operation of the engine. The fuel system typically includes a fuel pump, a fuel filter, and a fuel line connecting the two.

In general, in a layout of a hydraulic machine, particularly a layout of a hydraulic excavator, a fuel pump is disposed in an engine room, and a filter is disposed in a pump room where the hydraulic pump is located, so that a user can easily maintain or replace the filter.

Because the fuel pump is arranged in the engine chamber and the filter is arranged in a separate pump chamber, the fuel pipeline of the fuel system of the current medium and large-sized excavator is generally arranged between the fuel pump and the filter in a way that the fuel pipeline goes downwards from the engine chamber, passes through the main vertical plate of the rotary platform of the engine, then is folded upwards in the pump chamber and is connected with the fuel filter. However, in the conventional arrangement mode of the fuel pipeline, the pipeline needs to go downwards and then return upwards, the arrangement method causes bending of the fuel pipeline, the pipeline is long, oil pressure loss is increased, the pipeline arrangement is complex and is inconvenient to operate, a lot of difficulties are caused to installation and use of a fuel system, and the maintenance is inconvenient after a fault occurs.

The present invention is directed to solving the above problems and/or other problems in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a fuel oil system for hydraulic machine's engine, hydraulic machine includes the hydraulic pump, and this fuel oil system is including setting up fuel pump on the organism of engine, setting filter, the connection in the pump chamber at hydraulic pump place the fuel pump with the fuel pipeline, the setting of filter are in with fixing on the hydraulic pump the first support and the setting of fuel pipeline are in with fixing on the organism of engine the second support of fuel pipeline.

The utility model also provides a hydraulic machine, it includes hydraulic pump, engine and foretell fuel oil system.

The beneficial effects of the utility model reside in that, through set up first support on the hydraulic pump, set up the second support with fixed fuel pipeline on the engine for fuel pipeline extends smoothly, preferably roughly horizontally, has avoided the problem of the fuel pipeline flex among the prior art, fuel pipeline overlength, structure complicacy, loss of pressure are big and be difficult to installation and maintenance. Furthermore, the utility model discloses a hydraulic machine's filter can include that colander and secondary filter, fuel pipeline include that three pipelines, fuel pump include two oil pumps to reach better fuel filter effect.

Drawings

FIG. 1 is a perspective view of an exemplary hydraulic machine including a fuel system according to the present disclosure;

FIG. 2 is a schematic perspective view of a fuel system for an engine according to an exemplary embodiment of the present disclosure; and

FIG. 3 illustrates a schematic perspective view of an exemplary fuel system for an engine, partially showing an engine compartment and a pump chamber.

Detailed Description

FIG. 1 illustrates an exemplary hydraulic machine. The hydraulic machine may be any type of work machine, such as an excavator, loader, dozer, etc., that performs operations associated with a particular industry (e.g., construction, mining, farming, transportation, etc.) and operates in a variety of work environments (e.g., construction site, mine site, farm, roadway, etc.).

Hereinafter, the hydraulic shovel 100 shown in fig. 1 will be described in detail as a preferred hydraulic machine.

Referring to fig. 1, a hydraulic excavator 100 includes a lower traveling body 101, and an upper revolving body that is rotatively fitted to the lower traveling body 101. The upper slewing body includes a cab 102, a working device 106 in front of the cab 102, and an engine room 104 behind the cab 102.

As shown in fig. 2 and 3, the hydraulic machine according to the present invention includes a hydraulic pump 8, an engine 9, and a fuel system for the engine. Fig. 3 shows, as an example, a perspective view of an engine and its fuel system, in which the engine room on the left side of the figure is shown with the engine 9 and the pump room on the right side with the hydraulic pump 8. As shown in fig. 3, the hydraulic pump 8 is provided in a separate pump chamber. As an example, as shown in the drawing, the fuel pump is provided at a substantially upper left position on the engine body. The filter 1 is arranged inside, i.e. on the side of, a vertical housing 13 for defining the pump chamber.

As an exemplary embodiment, the fuel system includes fuel pumps (a first oil pump 6 and a second oil pump 7 in a preferred example to be described later) provided on an engine body, a filter 1 provided in a pump chamber where a hydraulic pump 8 is located, a fuel line 3 connecting the fuel pumps and the filter, a first bracket 4 provided on the hydraulic pump 8 to fix the fuel line 3, and a second bracket 5 provided on the engine body to fix the fuel line.

In this example, the first bracket 4 for fixing the fuel pipeline 3 is directly arranged on the hydraulic pump 8, the second bracket 5 is arranged on the engine body of the engine 9, and the fuel pipeline 3 extending from the fuel pump arranged on the engine body is supported and fixed through the first bracket 4 and the second bracket 5, so that the fuel pipeline can extend smoothly, and especially compared with the existing scheme that the fuel pipeline firstly descends and then is folded upwards by a pump chamber to be connected with a fuel filter so that the fuel pipeline is folded, the length and the pressure loss of the fuel pipeline are reduced, and the fuel system is simple in structure and convenient to install and maintain.

Preferably, the fuel line 3 extends substantially horizontally between the first bracket 4 and the second bracket 5.

Illustratively, as schematically shown in fig. 3, a partition 14 is provided between a pump chamber in which the hydraulic pump is located and an engine room in which the engine is located, the partition separating the engine room and the pump chamber. The fuel line passes between the first bracket 4 and the second bracket 5 through an opening formed in the partition 14, which opening is substantially at the same level as the first bracket 4 and the second bracket 5, so that the fuel line 3 extends substantially horizontally between the first bracket 4 and the second bracket 5. Illustratively, the partition is a panel that can act as a firewall.

Preferably, the position of the fuel pump on the engine 9, the position of the filter 1 in the pump chamber, and the positions of the first bracket 4, the second bracket 5, and the opening of the partition are such that the fuel line 3 extends substantially horizontally as a whole.

It will be appreciated by those skilled in the art that although only two brackets are shown on the engine 9 and the hydraulic pump 8, those skilled in the art will appreciate that multiple brackets may be provided on the engine and/or the hydraulic pump as desired. These brackets may also be provided at various locations on the engine 9 and the hydraulic pump 8 for space setting requirements.

For example, to achieve a better filtering effect, the filter 1 may comprise a coarse filter 11 and a fine filter 2. The structure realizes the secondary filtration of the fuel.

Preferably, in the example illustrated, the fuel system comprises a first line 31, a second line 32 and a third line 33, the fuel pumps comprise a first oil pump 6 and a second oil pump 7, wherein the outlet of the coarse filter 11 is connected to the first oil pump 6 by the first line 31, the outlet of the first oil pump 6 is connected to the fine filter 12 by the second line 32, the outlet of the fine filter 12 is connected to the second oil pump 7 by the third line 33, and the second oil pump 7 is connected to the engine 9.

In the above example, both ends of the first pipe line 31 are connected to the strainer 11 and the first oil pump 6 through the joints 2, respectively. Both ends of the second pipe 32 are connected to the first oil pump 6 and the fine filter 12 through the joints 2, respectively, and both ends of the third pipe 33 are connected to the fine filter 12 and the second oil pump 7 through the joints 2, respectively. The first oil pump 6, also called a transfer pump, passes through the coarse filter 11 and then enters the first oil pump 6 through a first line 31, after which the first oil pump 6 delivers the fuel to the fine filter 12 through a second line 32. The fuel exiting the fine filter 12 is fed via a third line 33 to the second fuel pump 7. The second oil pump 7 serves as a high-pressure pump for pumping fuel into the engine. The fuel system with the structure realizes better filtering effect.

It will be understood by those skilled in the art that although the fuel line and fuel pump and filter arrangement described above are described in detail, the present invention is not limited thereto and the arrangement of the present invention is also applicable to fuel lines of other arrangements or configurations.

The utility model also provides a hydraulic machine, it includes hydraulic pump 8, engine 9 and according to the fuel oil system for engine of any above-mentioned example. The hydraulic machine has the advantages of simple pipeline structure, small pressure loss, simple and convenient pipeline arrangement and convenient maintenance.

Industrial applicability

According to the utility model discloses a hydraulic machine, the fuel oil system's of its engine arrangement mode makes the length of fuel oil pipeline little, loss of pressure little to do benefit to installation and maintenance. In addition, the fuel pump, the filter and the fuel pipeline of the fuel system can obtain better filtering effect.

In particular, the fuel line 3 of the hydraulic machine comprises, as an example, a first line 31, a second line 32 and a third line 33. The three lines 31, 32, 33 are fixed by a first bracket 4 provided on the hydraulic pump 8 and by a second bracket 5 provided on the body of the engine 9. The three tubes are bundled at the first and/or second stent, for example by a strap, to be conveniently fixed to the first and/or second stent. The fuel line of the first line 31, the second line 32 and the third line 33 extends substantially horizontally between the first bracket and the second bracket without the fuel line being bent. The fuel pipeline has small length and pressure loss, and is favorable for installation and maintenance.

When the fuel system of the hydraulic machine 100 is in operation, fuel from a fuel tank (not shown) enters the coarse filter 11 of the filter 1, is filtered by the coarse filter 11, reaches the first oil pump 6 from the outlet of the coarse filter 11 through the first pipeline 31, is transferred by the first oil pump 6, reaches the fine filter 12 through the second pipeline 32, is filtered by the fine filter 12, reaches the second oil pump 7 from the outlet of the fine filter 12 through the third pipeline 33, and is sent to the engine 9 by the second oil pump 7. The fuel oil system can achieve a good fuel oil filtering effect.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments disclosed above without departing from the scope or spirit of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples disclosed herein be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims and their equivalents.

Claims (7)

1. A fuel system for an engine (9) of a hydraulic machine comprising a hydraulic pump (8), characterized in that the fuel system comprises:

a fuel pump provided on a body of the engine (9);

a filter (1) provided in a pump chamber in which the hydraulic pump (8) is located;

a fuel line (3) connecting the fuel pump and the filter;

a first bracket (4) provided on the hydraulic pump (8) to fix the fuel line; and

a second bracket (5) provided on the body of the engine (9) to fix the fuel line (3).

2. Fuel system according to claim 1, characterized in that the fuel line (3) extends substantially horizontally between the first bracket (4) and the second bracket (5).

3. Fuel system according to claim 2, characterised in that a partition (14) is provided between the pump chamber and the engine compartment in which the engine is located, the fuel line passing between the first bracket (4) and the second bracket (5) through an opening formed in the partition (14), wherein the opening is substantially at the same level as the first bracket (4) and the second bracket (5).

4. Fuel system according to any one of claims 1-3, characterized in that the filter (1) comprises a coarse filter (11) and a fine filter (12).

5. Fuel system according to claim 4, characterized in that said fuel line comprises a first line (31), a second line (32) and a third line (33), said fuel pump comprising a first oil pump (6) and a second oil pump (7), wherein the outlet of said coarse filter (11) is in fluid communication with said first oil pump (6) through said first line (31), the outlet of said first oil pump (6) is in fluid communication with said fine filter (12) through said second line (32), the outlet of said fine filter (12) is in fluid communication with said second oil pump (7) through said third line (33), and said second oil pump (7) is connected to said engine (9).

6. Hydraulic machine, characterized in that it comprises a hydraulic pump (8), an engine (9) and a fuel system according to any one of claims 1-5.

7. The hydraulic machine of claim 6, wherein the hydraulic machine is a hydraulic excavator.

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