Diesel engine, oil mist detection device and oil mist guide pipe of oil mist detection device

Abstract

The utility model discloses a diesel engine, an oil mist detection device and an oil mist guide pipe thereof, the oil mist guide pipe of the oil mist detection device comprises a guide pipe body and a shielding assembly, the guide pipe body is a hollow pipe body structure, one end of the guide pipe body is an air inlet end, and the other end of the guide pipe body is a measuring end. The shielding assembly is arranged on the guide pipe body and comprises a plurality of flow guide baffles, the flow guide baffles are sequentially arranged on the inner wall of the guide pipe body in the direction from the air inlet end to the measuring end, and a turbulent flow channel is formed by the flow guide baffles and the guide pipe body. During use, the oil mist conduit is mounted on a crankcase wall, the air inlet end of the conduit body is located in a crankcase body where a crankshaft is located, and the measuring end of the conduit body is connected with an oil mist detector. According to the oil mist guide pipe, the detection precision of the oil mist detector is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil mist detection, and particularly relates to a diesel engine, an oil mist detection device and an oil mist conduit thereof. Background Art

[0002] The oil mist explosion of a diesel engine will cause serious economic consequences and personal injuries. Requirements: For diesel engines with a cylinder diameter of more than 300 mm or a power of more than 2250 kW, an oil mist detector or a temperature detection device for all bearing parts or other similar detection instruments must be installed for fire prevention. With the wide application of oil mist detectors in large-bore diesel engines.

[0003] However, due to the limited space in the crankcase, splashing oil easily enters the oil mist conduit, resulting in oil stains on the photoelectric tube of the sensor of the oil mist detector, false alarms of the oil mist detector, and further reduction of the detection accuracy of the mist detector.

[0004] Therefore, how to improve the detection accuracy of the oil mist detector is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a diesel engine, an oil mist detection device and an oil mist conduit thereof to improve the detection accuracy of the oil mist detector.

[0006] The oil mist conduit of the oil mist detection device provided by this application includes:

[0007] A conduit body, which is a pipe body structure with a hollow interior, one end being an air inlet end and the other end being a measurement end;

[0008] A shielding component, which is arranged on the conduit body. The shielding component includes a plurality of diversion baffles. The plurality of diversion baffles are sequentially arranged on the inner wall of the conduit body along the direction from the air inlet end to the measurement end, and form a turbulent flow channel with the conduit body.

[0009] Optionally, in the oil mist conduit of the above oil mist detection device, the conduit body is a bent pipe structure.

[0010] Optionally, in the oil mist conduit of the above oil mist detection device, the conduit body is an L-shaped pipe, and the conduit body includes:

[0011] A horizontal pipe, and the measurement end is the free end of the horizontal pipe;

[0012] A vertical pipe, which is connected to one end of the horizontal pipe away from the free end. The bottom end of the vertical pipe is the air inlet end. The vertical pipe is located below the horizontal pipe, and the shielding component is arranged on the vertical pipe.

[0013] Optionally, in the oil mist conduit of the above oil mist detection device:

[0014] Projecting from top to bottom, at least part of the projections of two adjacent flow guiding baffles do not overlap;

[0015] And / or, the angle between the flow guiding baffle and the horizontal plane is an acute angle, the top end of the flow guiding baffle is connected to the inner wall of the vertical pipe, and the bottom end of the flow guiding baffle is close to the center of the vertical pipe.

[0016] Optionally, in the oil mist conduit of the above oil mist detection device, the shielding assembly further includes an intermediate connecting column, the flow guiding baffles are sequentially installed on the intermediate connecting column, the length direction of the intermediate connecting column extends along the air inlet end to the measurement end direction, and the flow guiding baffle is a sector structure.

[0017] Optionally, in the oil mist conduit of the above oil mist detection device, the shielding assembly further includes an end baffle, the end baffle is connected to the end of the intermediate connecting column, and the end baffle is located at the air inlet end, and an air vent is formed between the edge of the end baffle and the inner wall of the conduit body.

[0018] Optionally, in the oil mist conduit of the above oil mist detection device, the air vent is an inclined opening with an acute angle with the horizontal plane, and the bottom end of the air vent is closer to the crankshaft than the top end of the air vent.

[0019] Optionally, in the oil mist conduit of the above oil mist detection device, the oil mist conduit is an integrally formed structure.

[0020] An oil mist detection device includes an oil mist detector and further includes an oil mist conduit. The oil mist conduit is the oil mist conduit described in any one of the above, and the oil mist detector is installed at the measurement end of the oil mist conduit.

[0021] A diesel engine includes a crankcase and an oil mist detection device installed on the crankcase wall of the crankcase. The oil mist detection device is the oil mist detection device described above.

[0022] In the above technical solution, the oil mist conduit of the oil mist detection device provided by the present invention includes a conduit body and a shielding assembly. The conduit body is a hollow tube structure with one end as the air inlet end and the other end as the measurement end. The shielding assembly is arranged in the conduit body. The shielding assembly includes a plurality of flow guiding baffles. The plurality of flow guiding baffles are sequentially arranged on the inner wall of the conduit body along the air inlet end to the measurement end direction and form a flow disturbance channel with the conduit body. When in use, the oil mist conduit is installed on the crankcase wall, the air inlet end of the conduit body is located in the box body where the crankshaft is located, and the measurement end of the conduit body is connected to the oil mist detector.

[0023] As can be seen from the above description, in the oil mist detection device provided by the present application, by arranging an occlusion component inside the catheter body, a turbulence channel is formed by a plurality of diversion baffles of the occlusion component, so as to prevent the oil mist at the crankshaft position from smoothly passing through the hollow structure inside the catheter and splashing to the position of the oil mist detector. Therefore, the oil mist catheter provided by the present application improves the detection accuracy of the oil mist detector. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0025] Figure 1 Schematic diagram of the installation position of the oil mist detection device provided by the embodiment of the present invention;

[0026] Figure 2 Schematic cross-sectional structure diagram of the measurement end position of an oil mist catheter provided by the embodiment of the present invention;

[0027] Figure 3 For Figure 2 Partial schematic diagram of the measurement end position of the oil mist catheter shown along the A direction;

[0028] Figure 4 For Figure 2 Three-dimensional structure diagram of the cross-section of the measurement end position of the oil mist catheter shown;

[0029] Figure 5 For Figure 4 Partial enlarged view of the cross-section of the measurement end position of the oil mist catheter shown;

[0030] Figure 6 Schematic cross-sectional structure diagram of the measurement end position of another oil mist catheter provided by the embodiment of the present invention;

[0031] Figure 7 Schematic cross-sectional structure diagram of the measurement end position of yet another oil mist catheter provided by the embodiment of the present invention.

[0032] Wherein Figure 1-7 In:

[0033] 1 - oil mist catheter, 101 - catheter body, 10101 - horizontal pipe, 10102 - vertical pipe, 10103 - measurement end, 10104 - intake end, 102 - turbulence channel, 103 - intermediate connection column, 104 - diversion baffle, 105 - ventilation port, 106 - end baffle;

[0034] 2 - Oil mist detector;

[0035] 3 - Crankcase wall;

[0036] 4 - Crankshaft. Specific implementation manner

[0037] The core of the present utility model is to provide a diesel engine, an oil mist detection device and an oil mist conduit thereof, so as to improve the detection accuracy of the oil mist detector.

[0038] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below with reference to the drawings and implementation manners.

[0039] Please refer to Figures 1 to 7 .

[0040] In a specific implementation manner, the oil mist conduit of the oil mist detection device provided by the specific embodiment of the present utility model includes a conduit body 101 and a shielding assembly. The conduit body 101 is hollow inside, and has a tube structure with one end being an air inlet end 10104 and the other end being a measurement end 10103. Specifically, the conduit body 101 can be a straight tube or a bent tube structure. Specifically, the conduit body 101 can be an L-shaped tube. Specifically, the outer shape of the conduit body 101 is an L-shaped bent tube, and one end can be installed outside the crankcase for installing the conduit body 101 on the crankcase.

[0041] In order to facilitate the smooth passage of the aerosol through the conduit body 101, preferably, the inner wall corner position of the conduit body 101 has a smooth transition. For example, the inner wall corner of the conduit body 101 is provided as an arc.

[0042] For the convenience of processing, preferably, the conduit body 101 is a pipe fitting structure with the same inner diameter.

[0043] The shielding assembly is arranged on the conduit body 101, and the shielding assembly can be bonded to the conduit body 101.

[0044] The shielding assembly includes a plurality of flow guiding baffles 104, and the flow guiding baffles 104 can be flat plates or bent plate structures. The plurality of flow guiding baffles 104 are sequentially arranged on the inner wall of the conduit body 101 along the direction from the air inlet end to the measurement end. A turbulent flow channel 102 is formed between the plurality of flow guiding baffles 104 and the inner wall of the conduit body 101. Specifically, the distance between two adjacent flow guiding baffles 104 can be equal or unequal.

[0045] Specifically, the flow guiding baffle 104 can be connected by a rectangular plate member or an arc-shaped plate member, and the side wall of the flow guiding baffle 104 is connected to the inner wall of the conduit body 101.

[0046] During use, the oil mist conduit 1 is installed on the crankcase wall 3. The intake end 10104 of the conduit body 101 is located in the housing where the crankshaft 4 is located, and the measurement end 10103 of the conduit body 101 is connected to the oil mist detector 2.

[0047] As can be seen from the above description, in the oil mist detection device provided in the specific embodiment of the present application, by arranging a shielding component in the conduit body 101, a turbulence channel 102 is formed by a plurality of diversion baffles 104 of the shielding component, preventing the oil mist at the position of the crankshaft 4 from smoothly passing through the hollow structure inside the conduit and splashing to the position of the oil mist detector 2. Therefore, the oil mist conduit 1 provided in the present application improves the detection accuracy of the oil mist detector 2.

[0048] In a specific embodiment, the conduit body 101 includes a horizontal pipe 10101 and a vertical pipe 10102, and the measurement end 10103 is the free end of the horizontal pipe 10101. The vertical pipe 10102 is connected to one end of the horizontal pipe 10101 away from the free end. Specifically, the horizontal pipe 10101 can be a horizontally arranged pipe fitting, or the horizontal pipe 10101 is inclined downward toward the end close to the vertical pipe 10102. Of course, the horizontal pipe 10101 and the vertical pipe 10102 can be vertically arranged, and the vertical pipe 10102 is vertically arranged with respect to the horizontal plane.

[0049] Among them, both the vertical pipe 10102 and the horizontal pipe 10101 can be straight pipe structures.

[0050] The horizontal pipe 10101 and the vertical pipe 10102 can be connected by means such as bonding, welding or screwing. To improve the assembly efficiency and reduce the labor intensity of the staff, preferably, the horizontal pipe 10101 and the vertical pipe 10102 are integrally formed structures.

[0051] The bottom end of the vertical pipe 10102 is the intake end 10104. The vertical pipe 10102 is located below the horizontal pipe 10101, and the shielding component is arranged in the vertical pipe 10102. Specifically, the intake port of the intake end 10104 can be arranged parallel to the cross-section of the vertical pipe 10102. The shielding component can be fixedly connected to the inner wall of the vertical pipe 10102, or the shielding component is integrally formed with the vertical pipe 10102.

[0052] To improve the turbulence effect, preferably, when projected from top to bottom, at least part of the projections of two adjacent diversion baffles 104 do not overlap. With this setting, when the fluid flows from the intake end 10104 to the measurement end 10103, the oil mist needs to bypass the diversion baffle 104, and at least part of the projections of two adjacent diversion baffles 104 do not overlap, thereby more effectively blocking the oil mist, further preventing the oil mist from contacting the oil mist detector 2, and thus improving the detection accuracy of the oil mist detector 2.

[0053] Specifically, the flow guiding baffle 104 can be a semi-circular plate structure. When projected from top to bottom, the projections of two adjacent flow guiding baffles 104 form an annular structure. Alternatively, when projected from top to bottom, the projections of two adjacent flow guiding baffles 104 form a sector structure.

[0054] As Figure 2 and Figure 4 shown, in a specific embodiment, the angle between the flow guiding baffle 104 and the horizontal plane is an acute angle. At this time, the flow guiding baffle 104 can be a flat plate structure. The top end of the flow guiding baffle 104 is connected to the inner wall of the vertical pipe 10102, and the bottom end of the flow guiding baffle 104 is close to the center of the vertical pipe 10102. At this time, the bottom end of the flow guiding baffle 104 can be suspended.

[0055] Specifically, the angle between the flow guiding baffle 104 and the horizontal plane is designed to be 10° - 20°. For example, the angle between the flow guiding baffle 104 and the horizontal plane is designed to be 15°. As a result, the splashing oil entering from the bottom of the oil mist conduit 1 body slides down under the action of gravity and flows back into the crankcase. This enables the splashing oil entering the conduit body 101 to be discharged in a timely manner, effectively solving the problem of oil stain accumulation.

[0056] As Figure 2 and Figure 4 shown, the shielding assembly further includes an intermediate connecting column 103. The flow guiding baffles 104 are sequentially installed on the intermediate connecting column 103. Specifically, the flow guiding baffles 104 can be adhered to the intermediate connecting column 103, and the intermediate connecting column 103 can be a cylindrical body or a rectangular column body, etc.

[0057] The length direction of the intermediate connecting column 103 extends along the direction from the intake end to the measurement end. The flow guiding baffle 104 is a sector structure. Specifically, the shapes and sizes of each flow guiding baffle 104 can be the same or different. By setting the intermediate connecting column 103, the free ends of adjacent flow guiding baffles 104 are connected through the intermediate connecting column 103, achieving relative fixation, improving the installation stability of the flow guiding baffle 104, and at the same time enabling the oil mist liquid converging at the bottom end of the flow guiding baffle 104 to fall along the intermediate connecting column 103, preventing the oil mist from splashing again.

[0058] As Figure 4 shown, the shielding assembly further includes an end baffle 106, and the end baffle 106 is connected to the end of the intermediate connecting column 103. Specifically, the end baffle 106 is connected to the intermediate connecting column 103 by an adhesive method. To improve the assembly efficiency and reduce the labor intensity of the staff, preferably, the end baffle 106 and the intermediate connecting column 103 are integrally formed.

[0059] The end baffle 106 is located at the air inlet end 10104. The edge of the end baffle 106 and the inner wall of the duct body 101 form an air vent 105. The shielding assembly of the present application makes the oil mist passage in the duct body 101 form a "labyrinth" structure, increasing the travel of the oil mist passage and effectively shielding liquid splashing oil in all directions so that it cannot reach the phototube part in the measurement channel of the oil mist sensor in the oil mist detector 2. At the same time, the multi-layer "labyrinth" cavity design forms a turbulent flow channel 102, enabling the oil mist gas to flow normally into the measurement channel of the oil mist sensor and ensuring the detection accuracy of the oil mist detector 2.

[0060] Of course, the shielding assembly may not include the middle connecting column 103, and the edge of the end baffle 106 is connected to the inner wall of the duct body 101 through a connecting piece.

[0061] As Figure 6 shown, the air vent 105 is an inclined opening with an acute angle with the horizontal plane, and the bottom end of the air vent 105 is closer to the crankshaft 4 than the top end of the air vent 105. Specifically, the angle between the air vent 105 and the horizontal plane is 30° - 60°. For example, the angle between the air vent 105 and the horizontal plane is 45°. By setting the air vent 105 as an inclined opening and the position of the air vent 105 deviating from the crankshaft 4, splashing

[0062] Of course, as Figure 7 shown, the air vent 105 can also be a flat opening structure parallel to the horizontal plane.

[0063] To improve the assembly efficiency and reduce the assembly difficulty, preferably, the oil mist duct 1 is an integrally formed structure. To extend the service life, preferably, the oil mist duct 1 can be a stainless steel pipe. Specifically, the shielding assembly can be of stainless steel structure.

[0064] During specific assembly, the diversion baffle 104 is welded to the middle connecting column 103, the end of the middle connecting column 103 is welded to the end baffle 106, and part of the edge of the end baffle 106 is welded to the oil mist duct 1.

[0065] Due to problems such as high power density, high crankcase pressure and temperature, and limited installation space in the crankcase of large-bore high-speed diesel engines, especially for the characteristics of small installation space, high pressure, and high temperature in the crankcase of large-bore high-speed diesel engines, the present application effectively solves the situation that after the splashing oil enters the oil mist duct 1 and then contaminates the measurement channel of the oil mist sensor, resulting in false alarms, and improves the reliability, accuracy, and applicability of the oil mist detector 2.

[0066] An oil mist detection device provided by the present application includes an oil mist detector 2 and an oil mist conduit, wherein the oil mist conduit is any one of the above-mentioned oil mist conduits 1. The oil mist detector 2 is installed at the measuring end 10103 of the oil mist conduit 1. The specific structure of the oil mist conduit 1 has been described above. The present application includes the above-mentioned oil mist conduit 1 and also has the above-mentioned technical effects.

[0067] A diesel engine provided by the present application includes a crankcase and an oil mist detection device. The oil mist detection device is installed on the crankcase wall 3 of the crankcase, and the oil mist detection device is any one of the above-mentioned oil mist detection devices, that is, it includes the above-mentioned oil mist conduit 1 and also has the above-mentioned technical effects.

[0068] During specific assembly, the oil mist detector 2 is located outside the crankcase.

[0069] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts among the various embodiments, reference can be made to each other.

[0070] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An oil mist duct of an oil mist detection device, characterized in that: include: A catheter body (101), wherein the catheter body (101) is hollow inside and has a tube structure with one end being an air inlet end (10104) and the other end being a measuring end (10103); A shielding component, wherein the shielding component is arranged on the catheter body (101), and the shielding component includes a plurality of guide baffles (104), and the plurality of guide baffles (104) are sequentially arranged on the inner wall of the catheter body (101) along the direction from the air inlet end (10104) to the measuring end (10103), and form a spoiler channel (102) with the catheter body (101).

2. The oil mist conduit of the oil mist detection device according to claim 1, characterized in that: The catheter body (101) is a curved tube structure.

3. The oil mist conduit of the oil mist detection device according to claim 2, characterized in that: The catheter body (101) is an L-shaped tube, and the catheter body (101) comprises: A transverse tube (10101), wherein the measuring end (10103) is a free end of the transverse tube (10101); A vertical pipe (10102), wherein the vertical pipe (10102) is connected to an end of the horizontal pipe (10101) away from the free end, the bottom end of the vertical pipe (10102) is the air inlet end (10104), the vertical pipe (10102) is located below the horizontal pipe (10101), and the shielding component is arranged on the vertical pipe (10102).

4. The oil mist conduit of the oil mist detection device according to claim 3, characterized in that: When projected from top to bottom, at least part of the projections of two adjacent flow guide baffles (104) do not overlap; And / or, the angle between the guide baffle (104) and the horizontal plane is an acute angle, the top end of the guide baffle (104) is connected to the inner wall of the vertical pipe (10102), and the bottom end of the guide baffle (104) is close to the center of the vertical pipe (10102).

5. The oil mist conduit of the oil mist detection device according to claim 1, characterized in that: The shielding assembly also includes an intermediate connecting column (103), and the guide baffle (104) is sequentially installed on the intermediate connecting column (103). The length direction of the intermediate connecting column (103) extends from the air inlet end (10104) to the measuring end (10103), and the guide baffle (104) is a fan-shaped structure.

6. The oil mist conduit of the oil mist detection device according to claim 5, characterized in that: The shielding assembly also includes an end baffle (106), which is connected to the end of the middle connecting column (103), and the end baffle (106) is located at the air inlet end (10104), and the edge of the end baffle (106) and the inner wall of the duct body (101) form a vent (105).

7. The oil mist conduit of the oil mist detection device according to claim 6, characterized in that: The vent (105) is an oblique opening with an acute angle to the horizontal plane, and the bottom end of the vent (105) is closer to the crankshaft (4) relative to the top end of the vent (105).

8. The oil mist conduit of the oil mist detection device according to any one of claims 1 to 7, characterized in that: The oil mist conduit is an integrally formed structure.

9. An oil mist detection device, comprising an oil mist detector (2), characterized in that: It also includes an oil mist conduit, which is the oil mist conduit of the oil mist detection device according to any one of claims 1 to 8, and the oil mist detector (2) is installed at the measuring end (10103) of the oil mist conduit.

10. A diesel engine comprising a crankcase and an oil mist detection device mounted on a crankcase wall (3) of the crankcase, characterized in that: The oil mist detection device is the oil mist detection device according to claim 9.

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