CN103670849B - A kind of engine and fuel filter thereof - Google Patents

Abstract

The invention discloses a fuel filter for an engine. The fuel filter includes an oil inlet and an oil outlet, and at least includes a first-stage filter cup, a second-stage filter cup and a third-stage filter cup. And the main oil passage independently connected with the inlet and outlet of the filter cups of each level, wherein the oil inlet is formed at the inlet end of the main oil passage, and the oil outlet is formed at the outlet end of the main oil passage; The filter cups are independently connected to the main oil circuit, and the filter cups of each level form an independent fuel flow circuit. When one or two stages of filter cups are replaced, the normal operation of the other filter cups will not be affected, thus realizing the fuel filter. The filter cup is replaced under normal working conditions, which avoids the impact on the engine when the filter cup is replaced, and improves the work efficiency. The invention also discloses an engine comprising the above-mentioned fuel filter.

Description

A kind of engine and its fuel filter

technical field

The invention relates to the technical field of engine auxiliary devices, in particular to a fuel filter for an engine. The invention also relates to an engine comprising the above-mentioned fuel filter.

Background technique

The ubiquitous impurities in the fuel and the dirt deposited in the fuel tank for a long time will affect the purity of the fuel. If these impurities and dirt enter the engine, they will cause blockage of the relevant parts of the engine and affect the normal operation of the engine. Therefore, before the fuel enters the engine , it is usually necessary to filter out the more harmful impurities. The fuel filter is a device that filters solid impurities such as iron oxide and dust in the fuel. The installation of the fuel filter can prevent solid impurities from entering the engine, prevent the fuel system, especially the fuel injection nozzle from clogging, and reduce engine wear.

In order to ensure the filtering effect, a three-stage filter cup is generally used at present. The traditional three-stage filter cup fuel filter includes an oil inlet, the oil inlet is connected to the inlet of the first-stage filter cup, the outlet of the first-stage filter cup is connected to the inlet of the second-stage filter cup, and the second-stage filter cup The outlet of the third-stage filter cup is connected to the inlet of the third-stage filter cup, and the outlet of the third-stage filter cup is connected to the oil outlet of the system. There are filter parts in each filter cup; in this way, when the fuel enters the fuel filter through the oil inlet When it passes through the first-stage filter cup, the second-stage filter cup and the third-stage filter cup in turn, after being filtered layer by layer in each filter cup, the clean fuel flows out from the oil outlet, and then enters the engine.

However, the filter cups of the traditional three-stage fuel filter are arranged in series. When a filter cup of a certain stage is worn and needs to be replaced, the entire fuel filter must be stopped, that is, the engine needs to be stopped to complete the process. The replacement of a filter cup at a certain level cannot be replaced without stopping the machine, which affects the normal operation of the engine.

Therefore, how to realize the non-stop replacement of the filter cup of the three-stage fuel filter, and avoid affecting the normal operation of the engine when the fuel filter replaces the filter cup, has become an urgent problem to be solved by those skilled in the art.

Contents of the invention

The object of the present invention is to provide a fuel filter for an engine, which can replace the filter cup under normal working conditions, avoiding the impact on the engine when the filter cup is replaced, and improving the working efficiency. Another object of the present invention is to provide an engine including the above-mentioned fuel filter.

In order to solve the above technical problems, the present invention provides a fuel filter for an engine, which includes an oil inlet and an oil outlet; and at least includes a first-stage filter cup, a second-stage filter cup and a third-stage filter cup, And the main oil passage independently connected with the inlet and outlet of the filter cups of each stage; the oil inlet is formed at the inlet end of the main oil passage, and the oil outlet is formed at the outlet end of the main oil passage.

Preferably, a first valve is further included, through which the first inlet of the first-stage filter cup communicates with or is blocked from the main oil circuit.

Preferably, the first valve includes a first oil inlet pipeline communicated with the main oil passage, and a first oil outlet pipeline communicated with the first inlet; the first oil outlet pipeline is hinged to the first An oil inlet pipeline is capable of rotating around a hinge shaft relative to the first oil inlet pipeline.

Preferably, a second valve is also included, and the second inlet of the second-stage filter cup communicates with or is blocked from the main oil circuit through the second valve.

Preferably, the second valve includes a second oil inlet pipeline communicated with the main oil pipeline, and a second oil outlet pipeline communicated with the second inlet; the second oil outlet pipeline is hinged to the first The second oil inlet pipeline is capable of rotating around the hinge shaft relative to the second oil inlet pipeline.

Preferably, a third valve is further included, and the third inlet of the third-stage filter cup is communicated with or blocked from the main oil circuit through the third valve.

Preferably, the third valve includes a third oil inlet pipeline communicated with the main oil pipeline, and a third oil outlet pipeline communicated with the third inlet; the third oil outlet pipeline is hinged to the first There are three oil inlet pipelines, which can rotate relative to the third oil inlet pipeline around the hinge shaft.

Preferably, a filter seat is also included, and the filter cups of each level are respectively installed in the filter seat.

The present invention also provides an engine, comprising a body and a fuel filter connected to the oil passage of the body, and the fuel filter is the fuel filter as described above.

Further, it is specifically a marine diesel engine.

The fuel filter provided by the present invention is used for an engine, and the fuel filter includes an oil inlet and an oil outlet, and at least includes a first-stage filter cup, a second-stage filter cup and a third-stage filter cup, and is connected with each The inlet and outlet of the stage filter cup are independently connected to the main oil circuit, wherein the oil inlet is formed at the inlet end of the main oil circuit, and the oil outlet is formed at the outlet end of the main oil circuit; specifically, the main oil circuit and The first inlet of the first-stage filter cup is connected to the first outlet. The fuel flowing in from the oil inlet enters the first-stage filter cup through the first inlet. Oil circuit; the main oil circuit is connected with the second inlet and the second outlet of the second-stage filter cup. stage filter cup, and re-enter the main oil circuit; the main oil circuit is connected with the third inlet and third outlet of the third stage filter cup, and the fuel flowing into the oil inlet enters the third stage filter cup through the third inlet. The fuel flows out of the third-stage filter cup through the third outlet and re-enters the main oil circuit; the fuel re-enters the main oil circuit after being filtered by the filter cups of all levels, and flows out of the fuel filter through the oil outlet.

In this way, the filter cups of each level are independently connected to the main oil circuit, and the filter cups of each level form an independent fuel circulation circuit. When one or two filter cups are replaced, the normal operation of the other filter cups will not be affected, thus realizing The filter cup of the fuel filter is replaced under normal working conditions, which avoids the impact on the engine when the filter cup is replaced, and improves the working efficiency.

In a specific embodiment, the fuel filter provided by the present invention also includes a first valve, and the first inlet of the first-stage filter cup is communicated with or blocked from the main oil circuit through the first valve; thus, in normal working condition Next, the first valve is opened, and the fuel in the main oil circuit enters the first-stage filter cup through the first inlet, and after being filtered, it returns to the main oil circuit from the first outlet; when the first-stage filter cup needs to be removed, Close the first valve, switch the connection between the first-stage filter cup and the main oil circuit, and the fuel directly enters the second-stage filter cup from the main oil circuit, thus avoiding the fuel from the first-stage filter cup when the first-stage filter cup is removed. The filter bowl falls off, improving the performance of the fuel filter.

In another specific embodiment, the first valve of the fuel filter provided by the present invention includes a first oil inlet pipeline communicated with the main oil pipeline, and a first outlet pipeline communicated with the first inlet Oil pipeline; the first oil outlet pipeline is hinged to the first oil inlet pipeline, and can rotate relative to the first oil inlet pipeline around a hinge shaft. When the first-stage filter cup is working normally, the position of the first oil outlet pipeline is connected to the first inlet, so as to realize the communication between the first-stage filter cup and the main oil circuit; when the first-stage filter cup needs to be removed When the cup is removed, the rotation of the first oil outlet pipeline around the first oil inlet pipeline makes the first oil outlet pipeline stagger from the first inlet, thereby cutting off the communication between the first stage filter cup and the main oil circuit. In this way, the on-off of the first-stage filter cup and the main oil circuit is realized through the rotating pipe-section valve, and the structure is simple and easy to control.

Description of drawings

Fig. 1 is a perspective view of a specific embodiment of a fuel filter provided by the present invention;

Fig. 2 is a structural schematic diagram of the fuel filter shown in Fig. 1 when the three-stage filter cups are in normal operation;

Fig. 3 is a structural schematic diagram of the fuel filter shown in Fig. 1 when the first-stage filter cup stops working;

Fig. 4 is a structural schematic diagram of the fuel filter shown in Fig. 1 when the second-stage filter cup stops working;

FIG. 5 is a structural schematic diagram of the fuel filter shown in FIG. 1 when the filter cup of the third stage stops working.

detailed description

The core of the present invention is to provide a fuel filter for an engine, which can replace the filter cup under normal working conditions, avoiding the impact on the engine when the filter cup is replaced, and improving the working efficiency. Another core of the present invention is to provide an engine including the above-mentioned fuel filter.

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to Figure 1 to Figure 5, Figure 1 is a perspective view of a specific embodiment of the fuel filter provided by the present invention; Figure 2 is the structure of the fuel filter shown in Figure 1 when the three-stage filter cups are working normally Schematic diagram; Fig. 3 is a structural schematic diagram of the fuel filter shown in Fig. 1 when the first-stage filter cup stops working; Fig. 4 is a structural schematic diagram of the fuel filter shown in Fig. 1 when the second-stage filter cup stops working; FIG. 5 is a structural schematic diagram of the fuel filter shown in FIG. 1 when the filter cup of the third stage stops working.

The fuel filter provided by the present invention is used for an engine, and the fuel filter includes an oil inlet 1 and an oil outlet 2, and at least includes a first-stage filter cup 31, a second-stage filter cup 32 and a third-stage filter cup 33, and the main oil passage 4 that communicates independently with the inlet and outlet of the filter cups of each level, wherein the oil inlet 1 is formed at the inlet end of the main oil passage 4, and the oil outlet 2 is formed at the end of the main oil passage 4 outlet port; specifically, the main oil circuit 4 communicates with the first inlet 311 and the first outlet 312 of the first-stage filter cup 31, and the fuel flowing in from the oil inlet 1 enters the first-stage filter cup 31 through the first inlet 311, and passes through After completion, flow out of the first-stage filter cup 31 through the first outlet 312, and re-enter the main oil circuit 4; the main oil circuit 4 communicates with the second inlet 321 and the second outlet 322 of the second-stage filter cup 32, and the oil inlet 1 The inflowing fuel enters the second-stage filter cup 32 through the second inlet 321, and flows out of the second-stage filter cup 32 through the second outlet 322 after completion, and re-enters the main oil circuit 4; the main oil circuit 4 and the third-stage filter cup The third inlet 331 of 33 communicates with the third outlet 332, and the fuel flowing in from the oil inlet 1 enters the third-stage filter cup 33 through the third inlet 331, and flows out of the third-stage filter cup 33 through the third outlet 332 after completion. Re-enter the main oil circuit 4; the fuel re-entering the main oil circuit 4 after filtering by the filter cups at all levels flows out of the fuel filter through the oil outlet 2.

The above-mentioned filter cups of all levels can be installed in the filter seat 6 respectively, and the filter seat 6 has an integrated structure so that the filter cups of all levels can be integrated.

In this way, the filter cups of each level are independently connected to the main oil circuit 4, and the filter cups of each level form an independent fuel circulation circuit. When one or two filter cups are replaced, the normal operation of the other filter cups will not be affected, thereby realizing It prevents the fuel filter from changing the filter cup under normal working conditions, avoids the impact on the engine when the filter cup is replaced, and improves the work efficiency.

In the above specific embodiment, the fuel filter provided by the present invention also includes a first valve 51, and the first inlet 311 of the first-stage filter cup 31 communicates with or stops the main oil circuit 4 through the first valve 51; thus, Under normal working conditions, the first valve 51 is opened, and the fuel in the main oil circuit 4 enters the first-stage filter cup 31 through the first inlet 311, and after being filtered, returns to the main oil circuit 4 from the first outlet 312; When the first-stage filter cup 31 needs to be removed, the first valve 51 is closed, and the communication between the first-stage filter cup 31 and the main oil circuit 4 is switched, and the fuel directly enters the second-stage filter cup 32 from the main oil circuit 4 , Thereby it is avoided that when the first-stage filter cup 31 is disassembled, the fuel falls from the first-stage filter cup 31, and the performance of the fuel filter is improved.

The above-mentioned first valve 51 includes a first oil inlet pipeline communicated with the main oil passage 4, and a first oil outlet pipeline communicated with the first inlet 311; the first oil outlet pipeline is hinged to the first oil inlet pipe way, and can rotate around the hinge axis relative to the first oil inlet pipeline. When the first-stage filter cup 31 is working normally, the position of the first oil outlet pipeline is the position communicating with the first inlet 311, so as to realize the communication between the first-stage filter cup 31 and the main oil circuit 4; When the first stage filter cup 31 is used, the rotation of the first oil outlet pipeline around the first oil inlet pipeline makes the first oil outlet pipeline and the first inlet 311 stagger, thereby cutting off the first stage filter cup 31 and the main oil circuit 4 connection between. In this way, the on-off of the first-stage filter cup 31 and the main oil circuit 4 is realized through the rotating pipe-section valve, which has a simple structure and is easy to control.

Theoretically speaking, the first valve 51 is not limited to the above-mentioned structure, as long as the first valve 51 can realize the on-off of the first-stage filter cup 31 and the main oil circuit 4, for example, the first valve 51 can also be a flip Plate valves and other valve structures commonly used in this field.

In the above specific embodiment, the fuel filter provided by the present invention also includes a second valve 52, and the second inlet 321 of the second-stage filter cup 32 communicates with or blocks off the main oil circuit 4 through the second valve 52; thus, Under normal working conditions, the second valve 52 is opened, and the fuel in the main oil circuit 4 enters the second-stage filter cup 32 through the second inlet 321, and after filtering, it returns to the main oil circuit 4 from the second outlet 322; When the second-stage filter cup 32 needs to be removed, the second valve 52 is closed, and the communication between the second-stage filter cup 32 and the main oil circuit 4 is switched, and the fuel directly enters the second-stage filter cup 32 from the main oil circuit 4 . Therefore, fuel leakage from the second-stage filter cup 32 is avoided when the second-stage filter cup 32 is disassembled, and the performance of the fuel filter is improved.

The second valve 52 includes a second oil inlet pipeline communicated with the main oil passage 4, and a second oil outlet pipeline communicated with the second inlet 321; the second oil outlet pipeline is hinged to the second oil inlet pipeline , and can rotate around the hinge axis relative to the second oil inlet pipeline. When the second-stage filter cup 32 is working normally, the position of the second oil outlet pipeline is the position communicating with the second inlet 321, thereby realizing the communication between the second-stage filter cup 32 and the main oil circuit 4; When the second-stage filter cup 32 is used, the rotation of the second oil outlet pipeline around the second oil inlet pipeline makes the second oil outlet pipeline and the second inlet 321 stagger, thereby cutting off the second-stage filter cup 32 and the main oil circuit 4 connection between. In this way, the on-off of the second-stage filter cup 32 and the main oil circuit 4 is realized through the rotating pipe-section valve, which has a simple structure and is easy to control.

Theoretically speaking, the second valve 52 is not limited to the above-mentioned structure, as long as the second valve 52 can realize the on-off of the second-stage filter cup 32 and the main oil circuit 4, for example, the second valve 52 can also be turned Plate valves and other valve structures commonly used in this field.

It should be pointed out that the fuel filter provided by the present invention is not limited to only three-stage filter cups. In theory, multi-stage filter cups larger than three stages can also be set, for example, four-stage filter cups, Five-stage filter cups, etc., the structure of the newly added filter cups at all levels is similar to the structure of the above-mentioned filter cups, and will not be repeated here. The specific number of stages of the filter cup should be determined according to the actual filtration requirements and equipment space.

In the above-mentioned specific embodiment, the fuel filter provided by the present invention also includes a third valve 53, and the third inlet 331 of the third-stage filter cup 33 is communicated or blocked with the main oil circuit 4 through the third valve 53; thus, Under normal working conditions, the third valve 53 is opened, and the fuel in the main oil circuit 4 enters the third-stage filter cup 33 through the third inlet 331, and after filtering, it returns to the main oil circuit 4 from the third outlet 332; When the third-stage filter cup 33 needs to be removed, the third valve 53 is closed, and the communication between the third-stage filter cup 33 and the main oil circuit 4 is switched, and the fuel directly enters the second-stage filter cup 32 from the main oil circuit 4 , Therefore, when the third-stage filter cup 33 is disassembled, fuel oil is prevented from leaking from the third-stage filter cup 33, and the performance of the fuel filter is improved.

The third valve 53 includes a third oil inlet pipeline communicated with the main oil passage 4, and a third oil outlet pipeline communicated with the third inlet 331; the third oil outlet pipeline is hinged to the third oil inlet pipeline and can rotate around the hinge axis relative to the third oil inlet pipeline. When the third-stage filter cup 33 is working normally, the position of the third oil outlet pipeline is the position communicating with the third inlet 331, so as to realize the communication between the third-stage filter cup 33 and the main oil circuit 4; When the third-stage filter cup 33 is used, the rotation of the third oil outlet pipeline around the third oil inlet pipeline makes the third oil outlet pipeline and the third inlet 331 stagger, thereby cutting off the third-stage filter cup 33 and the main oil circuit 4 connection between. In this way, the connection between the third stage filter cup 33 and the main oil circuit 4 is realized through the rotating pipe section valve, which has a simple structure and is easy to control.

Theoretically speaking, the third valve 53 is not limited to the above-mentioned structure, as long as the third valve 53 can realize the on-off of the third-stage filter cup 33 and the main oil circuit 4, for example, the third valve 53 can also be turned Plate valves and other valve structures commonly used in this field.

Preferably, the first valve 51 , the second valve 52 and the third valve 53 exist at the same time, obviously, any one or any two valves can also be set independently.

It should be pointed out that the ordinal numerals such as "first, second, third" mentioned in the text are used to distinguish different structures with the same name, and are only for the convenience of description, and do not indicate a certain order, and should not be understood as any limitation.

Hereinafter, the working process of the fuel filter provided by the present invention will be briefly described by taking the above specific implementation as an example.

As shown in Figure 2, when the first valve 51, the second valve 52 and the third valve 53 are all open, the fuel in the main oil circuit 4 enters the first-stage filter cup 31 through the first inlet 311, and passes through the first The outlet 312 flows out of the first-stage filter cup 31; enters the second-stage filter cup 32 through the second inlet 321, flows out of the second-stage filter cup 32 through the second outlet 322; enters the third-stage filter cup 33 through the third inlet 331, and passes through The third outlet 332 flows out of the filter cup 33 of the third stage; the filter cups of all stages are in normal working condition.

As shown in Figure 3, when the first valve 51 is closed and the second valve 52 and the third valve 53 are opened, the fuel flows through the first inlet 311, and because the first inlet 311 is closed, the fuel cannot enter the first stage filter cup 31 , enter the second stage filter cup 32 directly through the second inlet 321, flow out of the second stage filter cup 32 through the second outlet 322; enter the third stage filter cup 33 through the third inlet 331, and flow out of the third stage through the third outlet 332 Filter cup 33; at this time, the first-stage filter cup 31 is not working, the second-stage filter cup 32 and the third-stage filter cup 33 are in normal working condition, and the first-stage filter cup 31 can be replaced.

As shown in Figure 4, when the second valve 52 is closed and the first valve 51 and the third valve 53 are opened, the fuel enters the first-stage filter cup 31 through the first inlet 311 and flows out of the first-stage filter cup through the first outlet 312 31; After the second inlet 321, because the second inlet 321 is closed, the fuel cannot enter the second-stage filter cup 32, and directly enters the third-stage filter cup 33 through the third inlet 331, and flows out of the third-stage filter cup through the third outlet 332 Cup 33; at this moment, the second-stage filter cup 32 is not working, the first-stage filter cup 31 and the third-stage filter cup 33 are in normal working condition, and the second-stage filter cup 32 can be replaced.

As shown in Figure 5, when the third valve 53 is closed and the first valve 51 and the second valve 52 are opened, the fuel enters the first-stage filter cup 31 through the first inlet 311 and flows out of the filter cup through the first outlet 312; The second inlet 321 enters the second-stage filter cup 32, and flows out of the second-stage filter cup 32 through the second outlet 322; after passing through the third inlet 331, because the third inlet 331 is closed, the fuel cannot enter the third-stage filter cup 33 and flows directly To the oil outlet 2; at this time, the third-stage filter cup 33 is not working, the first-stage filter cup 31 and the second-stage filter cup 32 are in normal working condition, and the third-stage filter cup 33 can be replaced.

In addition to the above-mentioned fuel filter, the present invention also provides an engine including the above-mentioned fuel filter. For the structure of other parts of the engine, please refer to the prior art, which will not be repeated here.

Specifically, the above-mentioned engine may be a marine diesel engine or a vehicle diesel engine.

The engine and its fuel filter provided by the present invention have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (9)

1. for a fuel filter for engine, including oil-in (1) and oil-out (2)； It is characterized in that, the most at least include first order filter bowl (31), second level filter bowl (32) and Three grades of filter bowls (33), and the main oil independently connected with the inlet and outlet of filter bowls at different levels Road (4)；Described oil-in (1) is formed at the entrance point of described working connection (4), described in go out Hydraulic fluid port (2) is formed at the port of export of described working connection (4)；

Described fuel filter also includes the first valve (51), described first order filter bowl (31) The first import (311) connected with described working connection (4) by described first valve (51) Or cut-off.

Fuel filter for engine the most according to claim 1, its feature exists In, described first valve (51) includes the first in-line connected with described working connection (4), And the first outlet line connected with described first import (311)；Described first outlet line hinge It is connected to described first in-line, and can turn relative to described first in-line around jointed shaft Dynamic.

Fuel filter for engine the most according to claim 1, its feature exists In, also include the second valve (52), second import (321) of described second level filter bowl (32) Connect by described second valve (52) with described working connection (4) or end.

Fuel filter for engine the most according to claim 3, its feature exists In, described second valve (52) includes the second in-line connected with described working connection (4), And the second outlet line connected with described second import (321)；Described second outlet line hinge It is connected to described second in-line, and can turn relative to described second in-line around jointed shaft Dynamic.

Fuel filter for engine the most according to claim 1, its feature exists In, also include the 3rd valve (53), the triple feed inlet (331) of described third level filter bowl (33) Connect by described 3rd valve (53) with described working connection (4) or end.

Fuel filter for engine the most according to claim 5, its feature exists In, described 3rd valve (53) includes the 3rd in-line connected with described working connection (4), And the 3rd outlet line connected with described triple feed inlet (331)；Described 3rd outlet line hinge It is connected to described 3rd in-line, and can turn relative to described 3rd in-line around jointed shaft Dynamic.

7. according to the fuel filter for engine described in any one of claim 1 to 6, It is characterized in that, also include filter block (6), filter bowls at different levels are respectively arranged in described filter block (6).

8. an engine, including body and the fuel filter that is connected with described body oil circuit, It is characterized in that, described fuel filter is the fuel oil as described in any one of claim 1 to 7 Cleaner.

Engine the most according to claim 8, it is characterised in that be specially bavin peculiar to vessel Oil machine.