Diesel engine cylinder head filtration system

Abstract

The present invention discloses a diesel engine cylinder head filtering system, comprising a primary oil filter installed at the outlet of the diesel engine cylinder head, a secondary oil filter arranged above the primary oil filter, and a connecting pipe connected between the primary oil filter and the secondary oil filter; a first oil recovery pipe is connected to the bottom of the primary oil filter; and a second oil recovery pipe is connected to the bottom of the secondary oil filter. The diesel engine cylinder head filtering system of the present invention fully cools and recovers the oil mist discharged by the diesel engine through the arrangement of the two-stage oil filter, thereby avoiding the oil mist from being discharged into the atmosphere and causing environmental pollution; the oil in the oil filter can be recovered by arranging the oil recovery pipe, thereby avoiding accumulation in the oil filter, reducing the maintenance burden, and ensuring the normal operation of equipment such as the diesel engine.

Description

Technical Field

[0001] The invention relates to the technical field of diesel engines, and in particular to a diesel engine cylinder head filtering system. Background Art

[0002] Each large diesel engine has two or more cylinder heads equipped with exhaust ports to discharge the excess air pressure in the crankcase to reduce the negative pressure of the crankcase. Each cylinder head exhaust port is equipped with an oil and gas filter (oil filter). Due to the high temperature inside the crankcase, the oil has formed oil mist in the crankcase, and the discharged gas carries more oil mist. When the oil mist reaches the oil filter, it is blocked by the filter screen so that the oil is not discharged. The gas mist passes through the filter and enters the exhaust pipe to the upper exhaust port. If the diesel engine is installed indoors, a fire blocker will be added to the exhaust port to prevent external fire sources from entering the diesel engine through the exhaust pipe and causing a fire.

[0003] The CAT4.4KW generator set on the offshore oil drilling platform had a small cylinder head outlet filter and no waste oil recovery device. After working for a long time, the accumulated oil leaked into the cylinder head, which brought certain risks. The flame blocker where the exhaust pipe reaches the outside did not recover the waste oil. Due to the high temperature, the oil mist floated in the air, causing environmental pollution. The gas discharged from the cylinder head is mostly oil mist. By installing two oil filters at the cylinder head outlet, when the oil mist reaches the oil filter, the density of the oil filter's filter screen causes the oil mist to solidify into liquid during the interlacing and not be discharged outdoors. The oil filter cannot filter all the oil and gas. The remaining oil mist gas passes through the oil filter and enters the indoor pipeline. The length of the pipeline is determined by the position of the machine body in the room. The longer the pipeline, the less oil mist reaches the outdoor. Through the cooling of the pipeline, part of the oil mist condenses into oil and flows downward into the oil filter; the shorter the pipeline, the shorter the cooling time of the pipeline, and most of it reaches the outdoor flame blocker. The inside of the flame blocker has the same effect as the oil filter in blocking the oil mist. Another part of the oil mist condenses into oil here and flows into the oil filter through the pipeline. If the unit runs for a long time, the oil filter, pipeline, and flame blocker will have a reduced condensation effect when the temperature continues to rise, and a large amount of oil mist will be discharged into the atmosphere, causing environmental pollution.

[0004] In actual work, due to work needs and sometimes because the equipment is running for too long, the oil filter is not cleaned and maintained in time, resulting in a large amount of oil stored in the oil filter. At this time, the external oil mist increases greatly, the negative pressure of the crankcase increases, and it is easy to cause equipment failure. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a diesel engine cylinder head filtering system which improves the oil mist cooling and recovery effect.

[0006] The technical solution adopted by the present invention to solve the technical problem is: to provide a diesel engine cylinder head filtering system, comprising a primary oil filter installed at the outlet of the diesel engine cylinder head, a secondary oil filter arranged above the primary oil filter, and a connecting pipe connected between the primary oil filter and the secondary oil filter; the oil mist discharged by the diesel engine enters the primary oil filter for cooling, and the uncooled part of the oil mist is transported to the secondary oil filter through the connecting pipe for re-cooling;

[0007] The bottom of the primary oil filter is connected to a first oil recovery pipe; the bottom of the secondary oil filter is connected to a second oil recovery pipe.

[0008] Preferably, the primary oil filter comprises a sealed first shell and a plurality of first heat dissipation pipes spaced apart and arranged transversely in the first shell;

[0009] The top of the first shell is provided with a first exhaust port connected to the connecting pipe; at least one side wall of the first shell is provided with a first air inlet connected to the outlet of the diesel engine cylinder head; the bottom of the first shell is provided with a first recovery port connected to the first recovery oil pipe.

[0010] Preferably, opposite ends of the first heat dissipation pipe are respectively fixed on opposite side walls of the first shell and penetrate the side walls, so that the inner channel of the first heat dissipation pipe is connected with the external air to form a heat dissipation channel for air to pass through and exchange heat with oil mist.

[0011] Preferably, the primary oil filter further comprises at least one first flow partition plate vertically arranged in the first housing;

[0012] The top of the first flow partition is connected to the inner top surface of the first shell, and the bottom of the first flow partition is separated from the inner bottom of the first shell, so that the internal space of the first shell is divided into at least two cooling spaces connected through the bottom, and the plurality of first heat dissipation pipes are distributed in all the cooling spaces.

[0013] Preferably, the bottom of the first shell is conical or inverted trapezoidal.

[0014] Preferably, the secondary oil filter comprises a sealed second shell and a plurality of second heat dissipation pipes spaced apart and arranged transversely in the second shell;

[0015] The bottom of the second shell is provided with a second air inlet connected to the connecting pipe and a second recovery port connected to the second oil recovery pipe; the upper end of at least one side wall of the second shell is provided with a second exhaust port.

[0016] Preferably, the opposite ends of the second heat dissipation pipe are respectively fixed on the opposite side walls of the second shell and penetrate the side walls, so that the internal channel of the second heat dissipation pipe is connected with the external air to form a heat dissipation channel for air to pass through and exchange heat with oil mist.

[0017] Preferably, the secondary oil filter further comprises a plurality of second flow partitions vertically arranged in the second housing;

[0018] A plurality of the second flow partitions are staggeredly connected to the inner top and the inner bottom of the second shell, so as to form a cooling flow channel in the second shell that is bent and turned in sequence along the plurality of the second flow partitions;

[0019] One end of the cooling channel is connected to the second air inlet, and the other end is connected to the second air outlet.

[0020] Preferably, a guide plate is provided in the second shell body between the cooling flow channel and the second air inlet; a first end of the guide plate is connected to the bottom plate of the second shell body at the edge of the second air inlet, and an opposite second end extends obliquely upward in the second shell body relative to the second air inlet; the cooling flow channel is connected to the second air inlet through the gap between the second end of the guide plate and the inner wall surface of the second shell body;

[0021] The second recovery port is arranged on the bottom plate connected to the guide plate, close to the second exhaust port.

[0022] Preferably, a baffle is provided above the second exhaust port, and the baffle extends obliquely downward relative to the second exhaust port.

[0023] The diesel engine cylinder head filtering system of the present invention can fully cool and recover the oil mist discharged from the diesel engine by setting up a two-stage oil filter, thereby preventing the oil mist from being discharged into the atmosphere and causing environmental pollution; and can recover the oil in the oil filter by setting up a recovery oil pipe, thereby preventing the oil from accumulating in the oil filter, reducing the maintenance burden, and ensuring the normal operation of equipment such as the diesel engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0025] Figure 1 It is a structural schematic diagram of a diesel engine cylinder head filter system according to an embodiment of the present invention;

[0026] Figure 2 , Figure 3 They are Figure 1 Schematic diagram of the cross-sectional structure of the middle-stage oil filter in two relatively vertical directions;

[0027] Figure 4 yes Figure 1Schematic diagram of the cross-sectional structure of the secondary oil filter in one direction. DETAILED DESCRIPTION

[0028] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0029] like Figure 1 As shown, a diesel engine cylinder head filtering system according to an embodiment of the present invention comprises a primary oil filter 10 installed at the outlet of a diesel engine cylinder head 1, a secondary oil filter 20 arranged above the primary oil filter 10, and a connecting pipe 30 connected between the primary oil filter 10 and the secondary oil filter 20. The oil mist discharged from the diesel engine enters the primary oil filter 10 for cooling, and the uncooled part of the oil mist is transported to the secondary oil filter 20 through the connecting pipe 30 for re-cooling, and the gas that will not condense after cooling is discharged from the upper end of the secondary oil filter 20.

[0030] The bottom of the primary oil filter 10 is connected to a first oil recovery pipe 40, which can timely discharge the oil condensed in the primary oil filter 10 and can be discharged to a recovery tank. The bottom of the secondary oil filter 20 is connected to a second oil recovery pipe 50, which can timely discharge the oil condensed in the secondary oil filter 20 and can also be discharged to a recovery tank. Alternatively, the end of the second oil recovery pipe 50 can be connected to the first oil recovery pipe 40, and the oil is collected in the first oil recovery pipe 40 and then transported to the recovery tank.

[0031] like Figure 2 , 3 As shown, the primary oil filter 10 includes a sealed first shell 11 and a plurality of first heat dissipation pipes 12 which are spaced apart and arranged transversely in the first shell 11 .

[0032] The first housing 11 is provided with a first exhaust port 13, at least one first air inlet 14 and a first recovery port 15. The first exhaust port 13 is located at the top of the first housing 11 and is connected to the connecting pipe 30; the uncooled oil mist in the primary oil filter 10 is transported to the secondary oil filter 20 through the first exhaust port 13 and the connecting pipe 30. The first air inlet 14 is arranged on at least one side wall of the first housing 11, and is used to connect with the outlet of the diesel engine cylinder head 1. According to whether the diesel engine has one or two (or more) cylinder heads 1, one or two (or more) first air inlet 14 are correspondingly arranged. The first recovery port 15 is arranged at the bottom of the first housing 11 and is connected to the first oil recovery pipe 40. The oil accumulated in the first housing 11 flows into the first oil recovery pipe 40 through the first recovery port 15 under gravity.

[0033] Specifically, on the primary oil filter 10, opposite ends of the first heat dissipation pipe 12 are respectively fixed on opposite side walls of the first housing 11 and penetrate the side walls, so that the internal channel of the first heat dissipation pipe 12 is connected with the external air, forming a heat dissipation channel for air to pass through and exchange heat with the oil mist. The first heat dissipation pipe 12 is connected with the external air to form an air cooling pipe, and the oil mist is cooled by the circulation of air, so that the oil mist is condensed into oil liquid for recovery.

[0034] Preferably, the side wall through which the end of the first heat dissipation tube 12 passes and the side wall where the first air inlet 14 is located are different side walls of the first shell 11 .

[0035] Furthermore, the primary oil filter 10 further includes at least one first flow partition 16 vertically disposed in the first housing 11. The top of the first flow partition 16 is connected to the inner top surface of the first housing 11, and the bottom is separated from the inner bottom of the first housing 11, so that the first flow partition 16 is suspended in the first housing 11. The first flow partition 16 divides the internal space of the first housing 11 into at least two cooling spaces connected through the bottom. A plurality of first heat dissipation pipes 12 are distributed in all cooling spaces.

[0036] In the cooling space in the first shell 11, the first air inlet 14 is connected to the adjacent cooling space, and another cooling space away from the first air inlet 14 is connected to the first exhaust port 13, so that the oil mist entering the first shell 11 through the first air inlet 14 passes through the adjacent cooling space and then turns from the bottom to enter another cooling space connected to the first exhaust port 13. The direction of the oil mist is as follows: Figure 2 The oil mist exchanges heat with the air passing through the first heat dissipation pipe 12 in the cooling space, condenses into oil liquid and then drips onto the inner bottom surface of the first shell 11 , and the uncondensed oil mist and gas go upward through the first exhaust port 13 into the connecting pipe 30 to be transported to the secondary oil filter 20 .

[0037] Preferably, the bottom of the first shell 11 is conical or inverted trapezoidal, so that the inner bottom surface of the first shell 11 forms a guiding inclined surface to guide the oil dripping thereon to the first recovery port 15 .

[0038] The primary oil filter 10 further includes a first filter screen (not shown) disposed at the first air inlet 14 to filter the oil mist entering the first housing 11 , and the oil therein is blocked by the first filter screen.

[0039] Combination Figure 1 , 4 The secondary oil filter 20 includes a sealed second shell 21 and a plurality of second heat dissipation pipes 22 which are spaced apart and arranged transversely in the second shell 21 .

[0040] The second shell 21 is provided with a second air inlet 23, a second recovery port 24 and a second exhaust port 25. The second air inlet 23 and the second recovery port 24 are both arranged at the bottom of the second shell 21; the second air inlet 23 is connected to the connecting pipe 30, and the oil mist enters the second shell 21 through the connecting pipe 30 and the second air inlet 23; the second recovery port 24 is spaced from the second air inlet 23, such as being distributed at both ends of the bottom of the second shell 21, and the second recovery port 24 is connected to the second oil recovery pipe 50, and the oil accumulated in the second shell 21 is discharged to the second oil recovery pipe 50 through the second recovery port 24. The second exhaust port 25 is arranged at the upper end of at least one side wall of the second shell 21, and is used to discharge the gas separated from the oil mist after cooling.

[0041] A baffle plate 26 is disposed above the second exhaust port 25. The baffle plate 26 extends downwardly relative to the second exhaust port 25, and the angle α between the baffle plate 26 and the plane where the second exhaust port 25 is located is less than 90°, and can be preferably 45°. The baffle plate 26 can shield the second exhaust port 25 from wind and rain, and can also guide the flow direction of the exhaust gas.

[0042] Specifically, the opposite ends of the second heat dissipation pipe 22 are respectively fixed on the opposite side walls of the second housing 21 and penetrate the side walls, so that the internal channel of the second heat dissipation pipe 22 is connected to the external air, forming a heat dissipation channel for air to pass through and exchange heat with the oil mist. The second heat dissipation pipe 22 is connected to the external air to form an air-cooled pipe, and the oil mist is cooled by the circulation of air, so that the oil mist is condensed into oil liquid for recovery.

[0043] Preferably, the side wall through which the end of the second heat dissipation tube 22 passes and the side wall where the second exhaust port 25 is located are different side walls of the second housing 21 .

[0044] Furthermore, the secondary oil filter 20 further includes a plurality of second flow partitions 27 vertically disposed in the second housing 21. The plurality of second flow partitions 27 are staggeredly connected to the inner top and inner bottom of the second housing 21. For example, two adjacent second flow partitions 27 have a top connected to the inner top of the second housing 21 and a bottom separated from the inner bottom of the second housing 21; and another second flow partition 27 has a bottom connected to the inner bottom of the second housing 21 and a top separated from the inner top of the second housing 21.

[0045] The staggered arrangement of the plurality of second flow partitions 27 forms a cooling channel in the second housing 21 that bends and turns in sequence along the plurality of second flow partitions 27. One end of the cooling channel is connected to the second air inlet 23, and the other end is connected to the second air outlet 25. The arrangement of the second heat dissipation pipe 22 and the second flow partition 27 in the secondary oil filter 20 enables the secondary oil filter 20 to function as a flame blocker, which can replace an outdoor flame blocker.

[0046] In this embodiment, a guide plate 28 is provided in the second shell 21 between the cooling flow channel and the second air inlet 23. The first end of the guide plate 28 is connected to the bottom plate of the second shell 21 at the edge of the second air inlet 23 (the edge of one side close to the second recovery port 24), and can also serve as the bottom plate part of the second shell 21; the second end of the guide plate 28 opposite to the second air inlet 23 extends obliquely upward in the second shell 21. The cooling flow channel is connected to the second air inlet 23 through the gap between the second end of the guide plate 28 and the inner wall surface of the second shell 21. The angle between the guide plate 28 and the plane where the second air inlet 23 is located is less than 90°.

[0047] The oil mist enters the second shell 21 through the second air inlet 23, and enters the cooling channel through the gap between the second end of the guide plate 28 and the inner wall of the second shell 21; along the direction of the cooling channel, it flows upward through the gap between the bottom of a second flow partition 27 and the inner bottom surface of the second shell 21, and then passes through the gap between the top of another adjacent second flow partition 27 and the inner top surface of the second shell 21, thus passing through all the second flow partitions 27, and finally reaches the second exhaust port 25. The flow direction is as follows: Figure 4 As shown by the arrow in the middle, the oil mist exchanges heat with the air passing through the second heat dissipation pipe 22 during its flow in the cooling channel, condenses and separates into oil and gas, and the oil drips onto the inner bottom surface (bottom plate) of the second housing 21 and flows toward the second recovery port 24 along the inner bottom surface.

[0048] The second recovery port 24 is arranged on the bottom plate connected to the guide plate 28, near the second exhaust port 25; the oil dripping onto the guide plate 28 flows along the guide plate 28 and the bottom plate to the second recovery port 24. Furthermore, the bottom plate connected around the second recovery port 24 is provided with a guide slope to guide the oil dripping thereon to the second recovery port 24.

[0049] The secondary oil filter 20 further includes a second filter (not shown) disposed at the second exhaust port 25 to filter the exhausted gas.

[0050] In the diesel engine cylinder head filtering system of the present invention, the primary oil filter 10 is located indoors, the secondary oil filter 20 is located outdoors, and the length of the connecting pipe 30 is set according to the distance between the two. During operation, the oil mist discharged from the diesel engine cylinder head 1 is cooled by the primary oil filter 10 and the secondary oil filter 20 in turn, and the condensed oil is discharged to the recovery tank, and the separated gas is finally discharged to the outside through the second exhaust port 25 of the secondary oil filter 20.

[0051] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A diesel engine cylinder head filter system, characterized in that: It comprises a primary oil filter installed at the outlet of the cylinder head of the diesel engine, a secondary oil filter arranged above the primary oil filter, and a connecting pipe connected between the primary oil filter and the secondary oil filter; the oil mist discharged by the diesel engine enters the primary oil filter for cooling, and the uncooled part of the oil mist is transported to the secondary oil filter through the connecting pipe for re-cooling; The bottom of the primary oil filter is connected to a first oil recovery pipe; the bottom of the secondary oil filter is connected to a second oil recovery pipe; The secondary oil filter comprises a sealed second shell and a plurality of second heat dissipation pipes spaced apart and arranged transversely in the second shell; The bottom of the second shell is provided with a second air inlet connected to the connecting pipe and a second recovery port connected to the second oil recovery pipe; the upper end of at least one side wall of the second shell is provided with a second exhaust port; The secondary oil filter further comprises a plurality of second flow partitions vertically arranged in the second housing; A plurality of the second flow partitions are staggeredly connected to the inner top and the inner bottom of the second shell, so as to form a cooling flow channel in the second shell that is bent and turned in sequence along the plurality of the second flow partitions; One end of the cooling channel is connected to the second air inlet, and the other end is connected to the second air outlet; A guide plate is provided in the second shell body between the cooling flow channel and the second air inlet; a first end of the guide plate is connected to the bottom plate of the second shell body at the edge of the second air inlet, and a second end opposite to the second air inlet extends obliquely upward in the second shell body relative to the second air inlet; the cooling flow channel is connected to the second air inlet through the gap between the second end of the guide plate and the inner wall surface of the second shell body; The second recovery port is arranged on the bottom plate connected to the guide plate, close to the second exhaust port; The cooling channel is connected to the second air inlet through the gap between the second end of the guide plate and the inner wall surface of the second shell, and the angle between the guide plate and the plane where the second air inlet is located is less than 90°. The oil mist enters the second shell through the second air inlet and enters the cooling channel through the gap between the second end of the guide plate and the inner wall surface of the second shell; a plurality of the second flow partitions and a plurality of the second heat dissipation pipes are arranged from above the second end of the guide plate to above the bottom plate of the second shell.

2. The diesel engine cylinder head filter system according to claim 1, characterized in that: The primary oil filter comprises a sealed first shell and a plurality of first heat dissipation pipes spaced apart and arranged transversely in the first shell; The top of the first shell is provided with a first exhaust port connected to the connecting pipe; at least one side wall of the first shell is provided with a first air inlet connected to the outlet of the diesel engine cylinder head; the bottom of the first shell is provided with a first recovery port connected to the first recovery oil pipe.

3. The diesel engine cylinder head filter system according to claim 2, characterized in that: The opposite ends of the first heat dissipation pipe are respectively fixed on the opposite side walls of the first shell and penetrate the side walls, so that the internal channel of the first heat dissipation pipe is connected with the external air to form a heat dissipation channel for air to pass through and perform heat exchange with oil mist.

4. The diesel engine cylinder head filter system according to claim 3, characterized in that: The primary oil filter further comprises at least one first flow partition plate vertically disposed in the first housing; The top of the first flow partition is connected to the inner top surface of the first shell, and the bottom of the first flow partition is separated from the inner bottom of the first shell, so that the internal space of the first shell is divided into at least two cooling spaces connected through the bottom, and the plurality of first heat dissipation pipes are distributed in all the cooling spaces.

5. The diesel engine cylinder head filter system according to claim 2, characterized in that: The bottom of the first shell is in a cone shape or an inverted trapezoidal shape.

6. The diesel engine cylinder head filter system according to claim 1, characterized in that: The opposite ends of the second heat dissipation pipe are respectively fixed on the opposite side walls of the second shell and penetrate the side walls, so that the internal channel of the second heat dissipation pipe is connected with the external air to form a heat dissipation channel for air to pass through and perform heat exchange with oil mist.

7. The diesel engine cylinder head filter system according to claim 1, characterized in that: A baffle is provided above the second exhaust port, and the baffle extends obliquely downward relative to the second exhaust port.

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