CN112727650A

CN112727650A - Fuel oil duplex filter

Info

Publication number: CN112727650A
Application number: CN202011522364.8A
Authority: CN
Inventors: 刘广才; 王昌庆; 李晓声; 浦卫华; 郭立君; 赵伟
Original assignee: 711th Research Institute of CSIC
Current assignee: Shanghai Marine Diesel Engine Research Institute; 711th Research Institute of CSIC
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-04-30

Abstract

The invention discloses a fuel duplex filter. The fuel duplex filter comprises: body, filter equipment, discharge valve and quick-operation joint. The filter device comprises at least two filter devices, wherein the filter devices are arranged in parallel and comprise cylindrical filter elements; the exhaust valve is arranged on the body; the quick connector is provided with a connecting part connected with the outside and is used for sampling or detecting oil parameters on line. Quick-operation joint has the connecting portion with external connection, and quick-operation joint is used for taking a sample or oil parameter on-line measuring, combines modern thing networking test technique to be provided with the unusual short-term test of filter function, and then can confirm the position of problem relatively fast, convenient timely processing. The design of the exhaust valve is adopted, so that the problem that when the fuel system is started after troubleshooting, maintenance or stopping for a period of time, the manual air release of a patrol worker is needed is solved, otherwise the fuel system is possibly abnormal, and even the damage of parts or the starting failure condition is caused.

Description

Fuel oil duplex filter

Technical Field

The invention relates to the field of marine diesel engines, in particular to a fuel duplex filter.

Background

High pressure common rail fuel injection systems have been widely used for their unique numerically precise control of injection characteristics. Along with the gradual increase of fuel injection pressure (over 160 MPa), severe requirements are put forward on main parts of a high-pressure common rail fuel injection system, for example, the clearance of a plunger pair of a high-pressure fuel pump is 6-8 mu m, and the clearance of a needle valve coupling is 3-5 mu m, which requires that fuel provided by a low-pressure fuel system of an engine has extremely high cleanliness requirement.

The fuel filter is used as the last safety guarantee of the high-pressure common rail fuel injection system, so that the safe and reliable operation of precision parts such as a high-pressure fuel pump, a fuel injector and the like is ensured, and the fuel filter plays a very important role in the performance and reliability of a diesel engine.

The fuel filter on the existing market is mostly used for a conventional mechanical fuel injection system, and can be repeatedly cleaned and used as a metal mesh filter element filter, the highest filtering precision is 10 mu m, the absolute filtering efficiency is not high, the fuel filter works for a long time in a single barrel mode, and the cleaning/replacement of the filter element is realized under the condition of no stop by adopting a duplex switching mode.

The marine diesel engine using the high-pressure common rail fuel injection system in the market is mostly a low-power high-speed diesel engine, the power of the whole diesel engine is not higher than 560kW, the high-precision fuel filter can be a low-flow rotary composite paper filter used by an automotive diesel engine, the filtering precision is 3 microns at most, the absolute filtering efficiency is high, the marine diesel engine is disposable, and the marine diesel engine is mostly used for single barrel work or multi-gang work. However, the mature products of the high-precision and high-flow fuel duplex filter suitable for the high-power marine diesel engine using the high-pressure common rail fuel injection system with the power of more than 1MW are few.

At present, the problems of the fuel oil duplex filter of the marine high-power diesel engine in the using process are as follows:

1. the cleanliness of the fuel oil entering the engine is abnormal, and the problem causes are not easy to lock quickly. On one hand, the marine high-power diesel engine has severe use environment, and brings possibility for abnormal and rapid blockage of a fuel filter due to aging of auxiliary equipment such as an oil pipeline, untimely maintenance and the like; on the other hand, filter element quality instability problem exists more commonly in domestic filter suppliers, and leads to the fuel filter to block up unusually fast.

2. The manual air release valve that current fuel filter generally set up has the risk of maloperation after the maintenance. When the fuel system is started after troubleshooting, maintenance or stopping for a period of time, manual air bleeding is needed, and the situation that the operator forgets the exhaust operation of the fuel system often occurs in the actual operation process, so that system parts are damaged and even the diesel engine fails to start is caused.

3. When the fuel filter element is normally maintained and replaced, the fuel in the filter barrel body cannot be smoothly discharged, inconvenience is brought to field operators, and meanwhile, the residual fuel in the filter barrel body is easily sprinkled beside a machine to influence the environment.

Disclosure of Invention

To address at least one of the above problems. The invention provides a fuel duplex filter. The fuel duplex filter comprises:

a body;

the filter device comprises at least two filter devices, wherein the filter devices are arranged in parallel and comprise cylindrical filter elements;

the exhaust valve is arranged on the body;

the quick connector is provided with a connecting part connected with the outside and is used for sampling or detecting oil parameters on line.

Quick-operation joint has the connecting portion with external connection, quick-operation joint is used for taking a sample or oil parameter on-line measuring, combines modern thing networking test technique to be provided with the unusual short-term test of filter function, and the interface is locked to the problem, and then can confirm the position of problem relatively fast, convenient timely processing.

The design of the exhaust valve is adopted, so that the problem that when the fuel system is started after troubleshooting, maintenance or stopping for a period of time, the manual air release of a patrol worker is needed is solved, otherwise the fuel system is possibly abnormal, and even the damage of parts or the starting failure condition is caused.

In an embodiment, the filtration device comprises:

the filter barrel body extends along the longitudinal direction, and the cylindrical filter element is sleeved in the filter barrel body;

and the oil drain valves are respectively arranged on the side wall and the bottom of the filter barrel body.

When the filter element needs to be replaced, the fuel oil remaining on the inner side (after filtration) of the filter element can be discharged by opening the fuel drain valve right below the filter barrel body. An oil drain valve is also arranged below the side of the filter barrel body. When the filter core is changed, open the fuel outlet valve 33 on the filter barrel body, the fuel in the filter barrel body will be from the intraductal outflow of fuel bleeder under the action of gravity and insert prepared container or sump oil case, treat to carry out the filter core again after the evacuation basically and change, with the weight of greatly reduced filter barrel body, improve on-the-spot maintenance personnel's convenience, also avoided because of the unable smooth discharge of the fuel in the filter barrel body, bring inconvenience for field operation personnel, the remaining fuel is also spilt the problem that influences the environment beside the machine easily in filter barrel body 31 simultaneously.

In an embodiment, the bottom of the cylindrical filter element is provided with a through hole communicated with the oil drain valve at the bottom of the filter barrel body.

In an embodiment, the fuel duplex filter further comprises:

and the differential pressure sensor joint is used for installing a differential pressure sensor so as to detect the pressure difference of the fuel oil duplex filter.

In an embodiment, the body is further provided with at least two oil inlet interfaces and at least two oil outlet interfaces, and the oil inlet interfaces and the oil outlet interfaces are respectively communicated with the filtering device.

In an embodiment, the number of the exhaust valves is two, and the two exhaust valves are respectively arranged at the oil inlet interface and the outlet and return interface.

In an embodiment, the fuel duplex filter further comprises:

the overflow valve is arranged on the body.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic front perspective view of a mounting base of a fuel duplex filter according to the present invention;

FIG. 2 is a schematic back perspective view of a mounting base of a fuel duplex filter according to the present invention;

FIG. 3 is a schematic view of an assembly structure of a fuel duplex filter according to the present invention;

FIG. 4 is a schematic view of the operation of an exhaust valve of a fuel duplex filter according to the present invention;

FIG. 5 is a schematic structural view of a filter unit of a fuel duplex filter according to the present invention;

fig. 6 is a partial structural schematic diagram of a filtering device of a fuel duplex filter according to the invention.

Detailed Description

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, it should be understood that these embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and various equivalent modifications of the present invention by those skilled in the art after reading the present invention fall within the scope of the appended claims.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-3, embodiments of the present invention provide a fuel duplex filter. The fuel duplex filter includes a body 10, namely a mounting seat 10. The mount 10 may be mounted on a diesel engine. Optionally, when the mounting seat 10 is designed, firstly, the design of the oil inlet and return channels of the filter is considered based on the above requirements, and meanwhile, the requirement of light weight needs to be considered, so that the mounting seat 10 adopts a casting channel core and a filter mounting seat 10 blank to realize the design of the special-shaped oil channel.

A plurality of interfaces, valve bodies and filtering devices are reasonably arranged on the mounting seat 10. The inside of the mounting seat 10 is formed with a fuel flow passage according to the use requirement. For example, the mount 10 may include a cartridge mounting interface (not shown) for mounting a cartridge; the differential pressure sensor joint 12 is used for installing a differential pressure sensor 60, so that the differential pressure of the fuel duplex filter is detected; an overflow valve mounting interface 13 for mounting an overflow valve; and the oil return interface 14, the automatic exhaust port 15 in front of the filter, the exhaust port 16 behind the filter, and the quick connectors 17 arranged in front of the filter and behind the filter can be used for oil product sampling (or other oil product parameter detection). The mounting seat 10 is further provided with at least two oil inlet interfaces 18 and at least two oil outlet interfaces 19, and the oil inlet interfaces 18 and the oil outlet interfaces 19 are respectively communicated with the filtering device. The mounting base 10 is further provided with a switching valve mounting hole 110.

Optionally, the quick coupling 17 has a connecting portion with external connection, the quick coupling 17 is used for sampling or oil parameter on-line measuring, and the combination of modern internet of things testing technology is provided with filter function abnormality quick measurement, problem locking interface

Two automatic exhaust valves 20 are also integrally mounted on the mounting base 10, and the exhaust valves 20 can automatically exhaust air mixed in the system when the low-pressure fuel system starts to work. The automatic exhaust valve 20 may include an exhaust valve body 21, an exhaust valve spool 22, and an elastic member 23 connected to the exhaust valve spool. The working principle of the automatic exhaust valve 20 is shown in fig. 4, the gas in the fuel pushes the exhaust valve core 22 upwards to move, the exhaust valve core 22 is separated from the lower interface of the exhaust valve body 21, the gas is exhausted therewith, and the exhaust valve core 22 is contacted with the upper part of the exhaust valve body 21 to further seal the exhaust channel. The design of the automatic exhaust valve 20 is adopted, so that the problem that when the fuel system is started after troubleshooting, maintenance or stopping for a period of time, the manual air release of a patrol worker is needed is solved, otherwise the fuel system is possibly abnormal, and even the damage of parts or the starting failure condition are caused.

Referring to fig. 5 and 6, the fuel duplex filter further includes a filter assembly 30. At least two of the filter devices 30. The filter devices 30 are arranged in parallel. The filter device comprises a filter barrel body 31 and a cylindrical filter element 32, wherein the filter element is made into a circular structure in order to realize the maximum flow area in the minimum space volume range based on the basic power function requirement of the fuel dual-filter. The strainer barrel 31 extends in the longitudinal direction. The cylindrical filter element 32 is sleeved in the filter barrel body 31. The oil drain valves 33 are respectively disposed on the side wall and the bottom of the filter barrel body 31. The fuel flows in the direction of the arrows in fig. 6, from outside into the inside of the filter element 32, through the filter element 32 and out of the top of the filter element 32. The filter barrel body 31 and the bottom of the filter element 32 are separated from the inner side and the outer side of the filter element 32 through sealing rings.

Referring to fig. 6, 8 circular holes 34 are formed right below the bottom of the cylindrical filter element 32, and the 8 circular holes are all located inside filter paper (filter element metal framework) of the filter element 32, so that when the filter element 32 needs to be replaced, the fuel drain valve 33 right below the filter barrel body 31 is opened, and the residual fuel inside the filter element 32 (after filtration) can be discharged. An oil drain valve 33 is also provided below the filter bowl 31 side. When the filter element 32 is replaced, the oil drain valve 33 on the filter barrel body 31 is opened, fuel oil in the filter barrel body 31 flows out from the fuel oil drain pipe under the action of gravity and is connected to a prepared container or a prepared sump oil tank, the filter element 32 is replaced after being basically emptied, the weight of the filter barrel body 31 is greatly reduced, the convenience of field maintenance personnel is improved, the problem that the environment is influenced due to the fact that the fuel oil in the filter barrel body 31 cannot be smoothly discharged is also avoided, inconvenience is brought to field operation personnel, and meanwhile, the residual fuel oil in the filter barrel body 31 is easy to spill beside a machine.

Any numerical value recited herein includes all values from the lower value to the upper value that are incremented by one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if it is stated that the number of a component or a value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended that equivalents such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also expressly enumerated in this specification. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are only examples of what is intended to be explicitly recited, and all possible combinations of numerical values between the lowest value and the highest value that are explicitly recited in the specification in a similar manner are to be considered.

Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. The use of "about" or "approximately" with a range applies to both endpoints of the range. Thus, "about 20 to about 30" is intended to cover "about 20 to about 30", including at least the endpoints specified.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional.

A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego such subject matter, nor should the inventors be construed as having contemplated such subject matter as being part of the disclosed subject matter.

Claims

1. A fuel dual filter, said fuel dual filter comprising:

a body;

the exhaust valve is arranged on the body;

2. The fuel duplex filter of claim 1, wherein said filter means comprises:

3. The fuel duplex filter according to claim 2, wherein the bottom of said cylindrical filter element is provided with a through hole for communicating with said fuel drain valve at the bottom of said filter barrel body.

4. The fuel dual filter as recited in claim 1, further comprising:

5. The fuel oil duplex filter according to claim 1, wherein said body is further provided with at least two oil inlet ports and at least two oil outlet ports, and said oil inlet ports and said oil outlet ports are respectively communicated with said filtering device.

6. The fuel oil duplex filter according to claim 5, wherein there are two exhaust valves, and the two exhaust valves are respectively disposed at the oil inlet port and the oil outlet port.

7. The fuel dual filter as recited in claim 1, further comprising:

the overflow valve is arranged on the body.

8. The fuel dual filter according to claim 1, wherein said body is formed by casting.