CN221278438U - Pressure test sealing device for crankcase inlet channel on diesel engine - Google Patents
Pressure test sealing device for crankcase inlet channel on diesel engine Download PDFInfo
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- CN221278438U CN221278438U CN202322912592.1U CN202322912592U CN221278438U CN 221278438 U CN221278438 U CN 221278438U CN 202322912592 U CN202322912592 U CN 202322912592U CN 221278438 U CN221278438 U CN 221278438U
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- 238000007789 sealing Methods 0.000 title claims abstract description 104
- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 238000003825 pressing Methods 0.000 claims abstract description 103
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 3
- 238000005266 casting Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a pressure test sealing device for an upper crankcase inlet channel of a diesel engine, wherein a cylinder cover air inlet sealing tool comprises an inner pressing plate, an outer pressing plate and a pressing bolt, and the pressing bolt is locked through a locking cap; the surface of the inner pressing plate is provided with a groove, and a nut of the compression bolt is clamped in the groove; the outer pressing plate is provided with a first sealing element, and the locking cap is provided with a second sealing element; the machine body free end air inlet channel sealing tool comprises a free end pressing plate, and a sealing piece is arranged between the air inlet channel pressing plate and the surface of the machine body; the engine body output end air inlet sealing tool comprises an output end pressing plate, an engine body output end air inlet port sealing piece is arranged between the output end pressing plate and the engine body surface, and a pressing tool connecting hole is formed in the output end pressing plate. The invention has the advantages of convenient use, simple installation and operation, and capability of uniformly distributing the sealing force on the sealing surface, thereby achieving better sealing effect, bearing high pressure in the pressure test process and improving the accuracy and efficiency of pressure test.
Description
Technical Field
The invention belongs to the technical field of engine manufacturing and maintenance, and particularly relates to a pressure test sealing device for an upper crankcase air inlet passage of a diesel engine.
Background
A diesel engine is an internal combustion engine that generates power by compressing diesel fuel to drive a vehicle. Because the diesel engine is in a high-temperature and high-pressure environment when in operation, and casting defects such as sand holes and the like can cause the air inlet channel and the exhaust channel to be connected together in the casting process, the condition not only can reduce the output power of the diesel engine, but also greatly influences the operation safety, stability and service life of the diesel engine. Therefore, it is an essential important step to perform a compression test on the intake duct before the diesel engine is assembled to ensure that it is in a closed state. Because the periphery of the upper crankcase air inlet channel of the trial-manufacture diesel engine is not provided with bolt holes, the prior sealing clamp is used for tightly pressing 4 bolt holes at the cylinder cover by adopting the upper part of the upper crankcase air inlet channel, and the cover plate 200 is tightly pressed by tightly screwing the fixing bolts 100 at the 4 bolt holes for sealing the air inlet channel. That is, as shown in fig. 14, the 4 bolt holes above the air inlet channel are adopted to provide the pressing force for the cover plate, but the provided pressing force cannot directly act on the upper part of the air inlet channel, so that the Fang Yajin force on the sealing channel is insufficient, the pressing force is uneven, the sealing effect is poor, air leakage is easy, and the pressure test of the air inlet channel cannot be effectively performed. In addition, the cover plate adopted by the existing tool is used with a large amount of materials and is particularly heavy, so that the waste of materials is generated, and the cover plate is too heavy during pressure test, so that the operation is inconvenient during pressure test. And most of the existing tools are sealed by an integral silica gel sealing gasket or an integral asbestos gasket, and the sealing effect is poor due to uneven pressing force acting on the integral sealing gasket. Accordingly, there is a need for improvements over existing sealing devices.
Disclosure of Invention
Therefore, the invention aims to overcome the defects in the prior art, and provides the pressure testing sealing device for the crankcase inlet channel on the diesel engine, which solves the problems that the crankcase on the diesel engine is not provided with uniformly distributed bolt holes around the pressure testing channel, and the positive and uniform pressing force cannot be provided for the pressing plate, so that the sealing effect is poor.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
A pressure test sealing device for an upper crankcase air inlet of a diesel engine comprises an air inlet sealing tool of a cylinder cover, an air inlet sealing tool of a free end air inlet of a machine body and an air inlet sealing tool of an output end of the machine body; the cylinder cover air inlet sealing tool comprises an inner pressing plate, an outer pressing plate and a pressing bolt on the inner pressing plate, wherein one end of a screw rod of the pressing bolt, which extends outwards out of the outer pressing plate, is locked through a locking cap, and the locking cap comprises a cap body and a pressing plate at the opening end of the cap body; a groove is formed in the surface of one side, far away from the outer pressing plate, of the inner pressing plate, and a nut of the compression bolt is clamped in the groove; a first sealing piece is arranged between the outer pressing plate and the outer wall of the air inlet of the upper crankcase, and a second sealing piece is arranged between the pressing plate of the locking cap and the outer pressing plate; the machine body free end air inlet sealing tool comprises a free end pressing plate fixed on the machine body free end through a screw, and a machine body free end air inlet port sealing piece is arranged between the air inlet pressing plate and the surface of the machine body; the engine body output end air inlet sealing tool comprises an output end pressing plate fixed at the engine body output end through screws, an engine body output end air inlet sealing piece is arranged between the output end pressing plate and the engine body surface, and a pressing tool connecting hole is formed in the output end pressing plate.
Further, the pressing tool connecting hole adopts a threaded hole.
Further, the first sealing piece, the second sealing piece, the air inlet opening sealing piece at the free end of the machine body and the air inlet opening sealing piece at the output end of the machine body are all sealing rings.
Further, a first seal mounting groove is formed in the side, facing the air inlet, of the outer pressing plate, and the first seal piece is mounted in the mounting groove.
Further, a second seal mounting groove is formed in the surface of one side, facing the outer pressing plate, of the pressing plate, and a second seal piece is mounted in the mounting groove.
Further, an output end sealing mounting groove is formed in one side, facing the machine body, of the output end pressing plate, and an air inlet opening sealing piece of the output end of the machine body is arranged in the mounting groove.
Further, a machine body free end sealing mounting groove is formed in one side, facing the machine body, of the free end pressing plate, and a machine body free end air inlet port sealing piece is arranged in the mounting groove.
Further, the compression bolt is in clearance fit with the penetrating hole in the outer pressing plate and the penetrating hole in the inner pressing plate.
Further, steps matched with the air inlet of the cylinder cover are arranged on the outer pressing plate and the inner pressing plate, and the outer edges of the steps are in clearance fit with the inner wall of the air inlet of the cylinder cover.
Further, the nut adopts an external hexagonal structure, and the groove is an internal hexagonal groove matched with the nut.
Compared with the prior art, the invention has the following advantages:
The sealing device provided by the invention is convenient to use, simple to install and operate, and capable of uniformly distributing sealing force on the sealing surface, so that a better sealing effect is achieved, high pressure can be born in the pressure test process, the use is light and flexible, and the accuracy and the efficiency of pressure test of the crankcase inlet channel on the diesel engine can be improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute an undue limitation on the invention. In the drawings:
FIG. 1 is a schematic view of a side of an air inlet at the free end of a body according to the present invention;
FIG. 2 is a cross-sectional view of the cylinder head port seal tooling portion A-A of FIG. 1;
FIG. 3 is a schematic view of the locking cap of the present invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a schematic view of an outer platen of the present invention;
FIG. 6 is a cross-sectional view taken along the direction C-C in FIG. 5;
FIG. 7 is a schematic view of an inner platen in accordance with the present invention;
FIG. 8 is a cross-sectional view taken along the direction D-D in FIG. 7;
FIG. 9 is a schematic view of the inlet side of the output end of the inventive engine block;
FIG. 10 is a schematic illustration of the free end platen of the present invention;
FIG. 11 is a cross-sectional view taken in the direction B-B of FIG. 10;
FIG. 12 is a schematic view of an output platen in accordance with the present invention;
FIG. 13 is a schematic view of an arrangement of the tool for sealing the cylinder head air inlet;
Fig. 14 is a schematic diagram of a prior art pressure test tooling arrangement in which 4 bolt holes above an air inlet are used to provide a pressing force for a cover plate.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the invention, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
The pressure test sealing device for the air inlet of the upper crankcase of the diesel engine comprises a cylinder cover air inlet sealing tool, an engine body free end air inlet sealing tool and an engine body output end air inlet sealing tool as shown in figures 1 to 13; the cylinder cover air inlet sealing tool comprises an inner pressing plate 1, an outer pressing plate 2 and a pressing bolt 3 on the inner pressing plate, wherein one end of a screw rod of the pressing bolt, which extends outwards out of the outer pressing plate, is locked through a locking cap 4, and the locking cap comprises a cap body 5 and a pressing plate 6 at the opening end of the cap body; a groove 7 is formed in the surface of one side, far away from the outer pressing plate, of the inner pressing plate, and a nut of the compression bolt is clamped in the groove; a first sealing piece 8 is arranged between the outer pressing plate and the outer wall of the air inlet of the upper crankcase, and a second sealing piece 9 is arranged between the pressing plate of the locking cap and the outer pressing plate. The nut adopts an external hexagonal structure, and the groove is an internal hexagonal groove matched with the nut.
The machine body free end air inlet sealing tool comprises a free end pressing plate 10 fixed on the machine body free end through screws, and a machine body free end air inlet port sealing piece is arranged between the air inlet pressing plate and the surface of the machine body; the free end pressing plate is provided with a machine body free end sealing mounting groove 11 towards one side of the machine body, and a machine body free end air inlet port sealing element is arranged in the mounting groove. The free end pressing plate is pressed by the bolts, so that sealing treatment of the air inlet channel at the free end of the machine body is realized.
The engine body output end air inlet sealing tool comprises an output end pressing plate 12 fixed at the engine body output end through screws, an engine body output end air inlet sealing piece is arranged between the output end pressing plate and the engine body surface, and a pressing tool connecting hole 13 is formed in the output end pressing plate. By way of example, the tool attachment hole is a threaded hole. The output end pressing plate is provided with an output end sealing mounting groove 14 towards one side of the machine body, and an air inlet opening sealing piece of the output end of the machine body is arranged in the mounting groove. The output end pressing plate is pressed by the bolts, so that sealing treatment of the air inlet channel at the output end of the machine body is realized.
For example, the first sealing member, the second sealing member, the air inlet opening sealing member at the free end of the machine body, and the air inlet opening sealing member at the output end of the machine body all adopt sealing rings. The outer pressure plate is provided with a first seal mounting groove 15 on the side facing the air inlet, in which the first seal is fitted. The platen has a second seal mounting groove 16 in its side facing the outer platen, in which a second seal is seated. It should be pointed out that, interior clamp plate can be made into rectangular shape to in order to stretch into the inlet opening inboard, when this device installs and use, can wear to establish compression bolt on interior clamp plate earlier, then the slope stretches into the inlet opening inboard with interior clamp plate, then put interior clamp plate flat to make interior clamp plate both ends support respectively the inlet opening inboard, then suit outer clamp plate on compression bolt, finally by locking cap can.
The outer side of the locking cap can be designed into an outer hexagonal structure, so that screwing operation is facilitated. In general, the compression bolt is in clearance fit with the through hole 18 on the outer pressing plate and the through hole 19 on the inner pressing plate, the steps 17 matched with the air inlet of the air cylinder cover are arranged on the outer pressing plate and the inner pressing plate, and the outer edges of the steps are in clearance fit with the inner wall of the air inlet of the air cylinder cover, so that the assembly and the disassembly operation are very convenient.
The concrete installation mode is, recess and the outer hexagonal cooperation of hold-down bolt on the interior clamp plate, make outer hexagonal card in the recess to put into the air inlet with interior clamp plate, with the step card of interior clamp plate on the air inlet lateral wall, portable holding the bolt, pass the bolt with the outer clamp plate of installing the rubber ring and install the air inlet passageway top, and with the step card of outer clamp plate on the air inlet lateral wall, later twist the locking cap of installing the rubber ring on hold-down bolt, and compress tightly it with the spanner, realize the sealed of cylinder head air inlet department. And the air inlet channel of the free end of the machine body is connected with a threaded hole corresponding to the free end of the machine body through a bolt, and the free end pressing plate is pressed tightly, so that the air inlet channel of the free end is sealed. And the air inlet channel of the output end of the machine body is connected with a threaded hole corresponding to the output end of the machine body through a bolt, and the output end pressing plate is pressed tightly, so that the air inlet channel of the output end is sealed.
When pressure test, will beat the instrument of pressing and be connected with the instrument connecting hole of pressing on the output clamp plate, beat the pressure to the intake duct, then soak the organism in the water tank and observe the condition that the bubble produced, judge the casting leakproofness of intake duct. The sealing device provided by the invention is convenient to use, simple to install and operate, and capable of uniformly distributing sealing force on the sealing surface, so that a better sealing effect is achieved, high pressure can be born in the pressure test process, the use is light and flexible, and the accuracy and the efficiency of pressure test of the crankcase inlet channel on the diesel engine can be improved.
The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a crankcase intake duct pressure testing sealing device on diesel engine which characterized in that: the device comprises a cylinder cover air inlet sealing tool, a machine body free end air inlet sealing tool and a machine body output end air inlet sealing tool; the cylinder cover air inlet sealing tool comprises an inner pressing plate, an outer pressing plate and a pressing bolt on the inner pressing plate, wherein one end of a screw rod of the pressing bolt, which extends outwards out of the outer pressing plate, is locked through a locking cap, and the locking cap comprises a cap body and a pressing plate at the opening end of the cap body; a groove is formed in the surface of one side, far away from the outer pressing plate, of the inner pressing plate, and a nut of the compression bolt is clamped in the groove; a first sealing piece is arranged between the outer pressing plate and the outer wall of the air inlet of the upper crankcase, and a second sealing piece is arranged between the pressing plate of the locking cap and the outer pressing plate; the machine body free end air inlet sealing tool comprises a free end pressing plate fixed on the machine body free end through a screw, and a machine body free end air inlet port sealing piece is arranged between the air inlet pressing plate and the surface of the machine body; the engine body output end air inlet sealing tool comprises an output end pressing plate fixed at the engine body output end through screws, an engine body output end air inlet sealing piece is arranged between the output end pressing plate and the engine body surface, and a pressing tool connecting hole is formed in the output end pressing plate.
2. The pressure test sealing device for an upper crankcase inlet of a diesel engine according to claim 1, wherein: the pressing tool connecting hole adopts a threaded hole.
3. The pressure test sealing device for an upper crankcase inlet of a diesel engine according to claim 1, wherein: the first sealing piece, the second sealing piece, the air inlet opening sealing piece at the free end of the machine body and the air inlet opening sealing piece at the output end of the machine body are all sealing rings.
4. A crankcase inlet pressure test seal assembly for a diesel engine according to claim 1 or 3, wherein: the outer pressure plate is provided with a first sealing installation groove towards one side of the air inlet, and a first sealing element is arranged in the installation groove.
5. A crankcase inlet pressure test seal assembly for a diesel engine according to claim 1 or 3, wherein: and a second sealing installation groove is formed in the surface of one side of the pressure plate, which faces the outer pressure plate, and a second sealing element is arranged in the installation groove.
6. A crankcase inlet pressure test seal assembly for a diesel engine according to claim 1 or 3, wherein: the output end pressing plate is provided with an output end sealing installation groove towards one side of the machine body, and an air inlet opening sealing piece of the output end of the machine body is installed in the installation groove.
7. A crankcase inlet pressure test seal assembly for a diesel engine according to claim 1 or 3, wherein: the free end pressing plate is provided with a machine body free end sealing mounting groove towards one side of the machine body, and a machine body free end air inlet port sealing piece is arranged in the mounting groove.
8. The pressure test sealing device for an upper crankcase inlet of a diesel engine according to claim 1, wherein: the compression bolt is in clearance fit with the penetrating hole in the outer pressing plate and the penetrating hole in the inner pressing plate.
9. The pressure test sealing device for an upper crankcase inlet of a diesel engine according to claim 1, wherein: the outer pressing plate and the inner pressing plate are respectively provided with a step matched with the air inlet of the cylinder cover, and the outer edge of the step is in clearance fit with the inner wall of the air inlet of the cylinder cover.
10. The pressure test sealing device for an upper crankcase inlet of a diesel engine according to claim 1, wherein: the nut adopts an external hexagonal structure, and the groove is an internal hexagonal groove matched with the nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322912592.1U CN221278438U (en) | 2023-10-30 | 2023-10-30 | Pressure test sealing device for crankcase inlet channel on diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322912592.1U CN221278438U (en) | 2023-10-30 | 2023-10-30 | Pressure test sealing device for crankcase inlet channel on diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221278438U true CN221278438U (en) | 2024-07-05 |
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ID=91694432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322912592.1U Active CN221278438U (en) | 2023-10-30 | 2023-10-30 | Pressure test sealing device for crankcase inlet channel on diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221278438U (en) |
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2023
- 2023-10-30 CN CN202322912592.1U patent/CN221278438U/en active Active
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