CN211397754U

CN211397754U - Automatic exhaust structure and system of diesel fine filter

Info

Publication number: CN211397754U
Application number: CN201922163026.9U
Authority: CN
Inventors: 桑志勇; 张彦峰; 于树广; 王胜胜
Original assignee: Henan Peace Filters Co ltd
Current assignee: Henan Peace Filters Co ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-09-01
Anticipated expiration: 2029-12-06

Abstract

The utility model provides a diesel oil secondary filter self-bleeding structure and system, one of them diesel oil secondary filter self-bleeding structure includes the secondary filter of vertical setting, be equipped with the feed liquor chamber on the upper portion of secondary filter and go out the liquid chamber, the feed liquor chamber all communicates with each other with the filter chamber that sets up in the secondary filter with going out the liquid chamber, be equipped with the cushion chamber directly over secondary filter upper portion is located the feed liquor chamber, the lower part and the feed liquor chamber of cushion chamber communicate with each other, upper portion at the secondary filter is equipped with the exhaust hole, the inner in exhaust hole communicates with each other with the top in cushion chamber, the external oil pipe that returns of outer end in exhaust. The exhaust hole is positioned at the unfiltered side of the filter, so that the diesel oil flowing out through the exhaust hole is prevented from being filtered repeatedly; a one-way valve is added on an oil return pipe connected with the oil tank, so that air can only return to the oil tank through the oil return pipe, and the oil return pipe is prevented from sucking back; when the engine starts for the first time, the air in the filter can be automatically exhausted through the oil pumping of the manual oil pump or the electric oil delivery pump, the air exhaust through the manual unscrewing of the air release bolt is not needed, and the oil liquid is prevented from flowing out.

Description

Automatic exhaust structure and system of diesel fine filter

Technical Field

The utility model relates to a diesel engine oil feeding system, concretely relates to diesel oil secondary filter self-bleeding structure and system.

Background

The diesel fine filter does not exhaust air: in the driving process of a vehicle, especially under the condition of less oil quantity, the oil tank cannot avoid vibration, air mixed in oil can enter the fine filter, if the oil cannot be discharged in time, the oil can enter the engine along with the oil after a certain quantity is accumulated, the oil supply of the engine is insufficient, and the effects of blockage, flameout and the like are caused.

SUMMERY OF THE UTILITY MODEL

To the problem among the prior art, the utility model provides a diesel oil secondary filter self-bleeding structure.

The utility model provides a diesel oil secondary filter automatic exhaust structure, includes the secondary filter of vertical setting the upper portion of secondary filter is equipped with feed liquor chamber and play liquid chamber, feed liquor chamber and play liquid chamber all with the filter chamber that sets up in the secondary filter communicates with each other, its characterized in that: the upper part of the fine filter is provided with a buffer cavity which is positioned right above the liquid inlet cavity, the lower part of the buffer cavity is communicated with the liquid inlet cavity, the upper part of the fine filter is provided with an exhaust hole, the inner end of the exhaust hole is communicated with the top of the buffer cavity, and the outer end of the exhaust hole is externally connected with an oil return pipe.

Further comprises the following steps: the aperture range of the exhaust hole is more than or equal to 0.5mm and less than or equal to 0.7 mm. Has the air exhaust capacity and simultaneously meets the pressure loss requirement.

Further comprises the following steps: the straight-through pipe is connected to the oil return pipe in series, a strip-shaped joint is arranged on the straight-through pipe, one end of the strip-shaped joint is fixedly connected with the straight-through pipe, and the exhaust hole penetrates through the strip-shaped joint; the upper part of the fine filter is provided with an inserting hole, the inner end of the inserting hole is communicated with the top of the buffer cavity, the end part of the inner end of the strip-shaped joint is positioned in the inserting hole and is in threaded fit and sealed connection with the inserting hole, one end of the exhaust hole is communicated with the inserting hole, and the other end of the exhaust hole is communicated with the straight-through pipe. Is convenient for processing and assembling.

An automatic exhaust system of a diesel fine filter is characterized in that: the oil inlet of the liquid inlet cavity is communicated with an oil outlet of the oil tank after sequentially passing through an oil transfer pump and a prefilter, the oil outlet of the liquid outlet cavity is sequentially communicated with an oil return port of the oil tank through an oil return pipe after passing through an oil supply system and an oil nozzle, and an outer end port of the exhaust hole is communicated with the oil return pipe.

Further comprises the following steps: and a one-way valve is arranged between the fine filter and the oil tank on the oil return pipe.

The utility model has the advantages that: the exhaust hole is positioned at the unfiltered side of the filter, so that the diesel oil flowing out through the exhaust hole is prevented from being filtered repeatedly.

Secondly, in order to avoid air suction, a one-way valve is added on an oil return pipe connected with the oil tank, and air can only return to the oil tank through the oil return pipe, so that the oil return pipe is prevented from sucking back.

When the engine is started for the first time, air in the filter can be automatically exhausted through pumping oil by the manual oil pump or the electric oil delivery pump, and the air is not required to be exhausted by manually unscrewing the air release bolt, so that oil is prevented from flowing out.

Drawings

Fig. 1 is a schematic view of an exhaust structure of a middle fine filter of the present invention;

FIG. 2 is a diagram of an automatic exhaust system of the diesel fine filter of the present invention;

fig. 3 is a pressure testing system diagram of the middle fine filter of the present invention.

In the figure, 1, a fine filter; 11. a liquid inlet cavity; 12. a buffer chamber; 13. inserting holes; 14. a straight-through pipe; 15. an exhaust hole; 16. a filter chamber; 17. a strip joint; 2. an oil transfer pump; 3. a prefilter; 4. an oil tank; 5. an oil supply system; 6. an oil jet; 61. an internal combustion engine; 7. an oil return pipe.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings. It should be noted that the terms of orientation such as left, middle, right, up and down in the examples of the present invention are only relative to each other or are referred to the normal use status of the product, and should not be considered as limiting.

An automatic exhaust structure of a diesel fine filter is shown in figure 1 and comprises a fine filter 1 which is vertically arranged, wherein a liquid inlet cavity 11 and a liquid outlet cavity are arranged on the upper portion of the fine filter 1, the liquid inlet cavity 11 and the liquid outlet cavity are both communicated with a filter cavity 16 arranged in the fine filter 1, a buffer cavity 12 is arranged on the upper portion of the fine filter 1 and located right above the liquid inlet cavity 11, the lower portion of the buffer cavity 12 is communicated with the liquid inlet cavity 11, an exhaust hole 15 is arranged on the upper portion of the fine filter 1, the inner end of the exhaust hole 15 is communicated with the top of the buffer cavity 12, the outer end of the exhaust hole 15 is externally connected with an oil return pipe 7, and the aperture range of the exhaust hole 15 is more than or equal to 0.5mm and less than or equal to 0.7 mm.

The oil return device comprises a straight-through pipe 14, wherein the straight-through pipe 14 is connected to the oil return pipe 7 in series, a strip-shaped joint 17 is arranged on the straight-through pipe 14, one end of the strip-shaped joint 17 is fixedly connected with the straight-through pipe 14, and an exhaust hole 15 penetrates through the strip-shaped joint 17; the upper part of the fine filter 1 is provided with an inserting hole 13, the inner end of the inserting hole 13 is communicated with the top of the buffer cavity 12, the end part of the inner end of the strip-shaped joint 17 is positioned in the inserting hole 13 and is in threaded fit and sealed connection with the inserting hole 13, one end of the exhaust hole 15 is communicated with the inserting hole 13, and the other end of the exhaust hole 15 is communicated with the straight-through pipe 14.

As shown in fig. 3, in order to test the pressure at both sides of the liquid outlet and the liquid inlet of the fine filter, the liquid inlet of the fine filter is connected with the liquid outlet of the oil tank after passing through the oil transfer pump, and the liquid outlet of the fine filter is connected with the oil return port of the oil tank through a straight pipe and directly connected with the oil return port of the oil tank; therefore, whether the performance of the fine filter meets the requirements after the structure is used and the effectiveness of the structure are verified.

Pressure loss test

Theoretically, the larger the vent hole, the better the venting effect, but the test method for the pressure loss requirement of the filter must be satisfied: gradually enlarging the exhaust hole and measuring pressure loss data;

the test conditions are as follows: flow rate: 3.5L/min

Testing oil: JIS K22042 light oil

Oil temperature: 38 + -3 deg.C

Required values: less than or equal to 10kPa

The test data are as follows:

from the data, the pressure loss changes less and less after the aperture of the vent hole is less than or equal to 0.7mm, and the specification requirement of the product can be completely met. In addition, the air efficiency is affected by too small exhaust holes, and the exhaust effect is best when the aperture of the exhaust holes ranges from 0.5mm to 0.7mm (both inclusive) in comprehensive consideration, and the pressure loss is satisfied.

Installation test

The original problems are that the engine is difficult to start again the next day after the engine is stopped, the manual oil pump must be pressed again to start the engine, and ignition is needed for multiple times. The 20 fine filters with the structure are manufactured and installed on excavator engines of three companies, tests are carried out in inner Mongolia places, Hubei places and the like, the problem is solved after the fine filters with the structure are installed, starting is smooth on the second day after shutdown, a manual oil pump does not need to be pressed, and one-time ignition is successful.

The utility model provides a diesel oil fine filter automatic exhaust system, as shown in fig. 1 and fig. 2, includes fine filter 1, the oil inlet that feed liquor chamber 11 set up communicates with each other with the oil-out of oil tank 4 behind oil transfer pump 2 and prefilter 3 in proper order, the oil-out that goes out the liquid chamber and sets up in proper order through oil feeding system 5 and fuel sprayer 6 after through return oil pipe 7 with the oil return opening of oil tank 4 communicates with each other, the outer end port of exhaust hole 15 with return oil pipe 7 communicates with each other. A one-way valve is arranged on the oil return pipe 7 and between the fine filter 1 and the oil tank 4. The oil nozzle 6 is arranged on the internal combustion engine 61, and the straight-through pipe 14 on the fine filter 1 is connected in series with the oil return pipe 7.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a diesel oil secondary filter automatic exhaust structure, includes the secondary filter of vertical setting the upper portion of secondary filter is equipped with feed liquor chamber and play liquid chamber, feed liquor chamber and play liquid chamber all with the filter chamber that sets up in the secondary filter communicates with each other, its characterized in that: the upper part of the fine filter is provided with a buffer cavity which is positioned right above the liquid inlet cavity, the lower part of the buffer cavity is communicated with the liquid inlet cavity, the upper part of the fine filter is provided with an exhaust hole, the inner end of the exhaust hole is communicated with the top of the buffer cavity, and the outer end of the exhaust hole is externally connected with an oil return pipe.

2. The automatic exhaust structure of the fine filter for diesel oil as claimed in claim 1, wherein: the aperture range of the exhaust hole is more than or equal to 0.5mm and less than or equal to 0.7 mm.

3. An automatic exhaust structure of a fine filter for diesel oil as claimed in claim 1 or 2, wherein: the straight-through pipe is connected to the oil return pipe in series, a strip-shaped joint is arranged on the straight-through pipe, one end of the strip-shaped joint is fixedly connected with the straight-through pipe, and the exhaust hole penetrates through the strip-shaped joint; the upper part of the fine filter is provided with an inserting hole, the inner end of the inserting hole is communicated with the top of the buffer cavity, the end part of the inner end of the strip-shaped joint is positioned in the inserting hole and is in threaded fit and sealed connection with the inserting hole, one end of the exhaust hole is communicated with the inserting hole, and the other end of the exhaust hole is communicated with the straight-through pipe.

4. An automatic exhaust system of a diesel fine filter is characterized in that: the fine filter comprises the fine filter as claimed in claim 1 or 2, wherein an oil inlet arranged in the liquid inlet cavity is communicated with an oil outlet of an oil tank after sequentially passing through an oil transfer pump and a pre-filter, an oil outlet arranged in the liquid outlet cavity is communicated with an oil return port of the oil tank through an oil return pipe after sequentially passing through an oil supply system and an oil nozzle, and an outer end port of the exhaust hole is communicated with the oil return pipe.

5. An automatic exhaust system of a fine filter for diesel fuel as claimed in claim 4, wherein: and a one-way valve is arranged between the fine filter and the oil tank on the oil return pipe.