Diesel engine cylinder block cylinder hole sealing structure

Abstract

The application provides a diesel engine cylinder hole sealing structure, which comprises a sealing plate, bolts, a screw rod, a top head and a sealing gasket, the sealing plate is fixed to the cylinder surface of the diesel engine through a plurality of bolts, a through hole is formed on the sealing plate corresponding to each cylinder hole on the cylinder surface, a plurality of plugging holes are formed around each through hole, the plugging holes correspond to water holes on the cylinder surface, the screw rod is screwed into the plugging hole, the movable top head is connected to the end of the screw rod, and the sealing gasket is sleeved on the front part of the top head. The application has the beneficial effects that the screw rod is fixed on the sealing plate, the top head is connected to the end of the screw rod, and the sealing gasket is arranged on the top head, so that the top head can be movable while being connected to the end of the screw rod, and flexible contact with the cylinder surface is realized, and the cylinder surface is not damaged. The top head is used to plug the water holes on the cylinder surface, when water leakage occurs, the screw rod can be adjusted to change the pressing force on the top head, and the top head can be pressed to seal the water holes better.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of diesel engine body cylinder hole sealing, in particular to a diesel engine body cylinder hole sealing structure. BACKGROUND

[0002] Engine air leakage, oil leakage and water leakage are important problems for evaluating the reliability of the sealing system, which will seriously affect the user satisfaction. The cooling module sealing system is mainly used for sealing the cooling liquid in the engine body, and the working environment is harsh. Especially under thermal shock conditions, the cooling module flange surface will be subjected to alternating water temperature, oil temperature and different deformation caused by different thermal expansion coefficients of different materials, etc. Air leakage, oil leakage and water leakage failures are prone to occur. In view of this, the production enterprises will carry out sealing test on the water cavity, oil channel and other parts after the engine body is processed to simulate the state of the medium (such as temperature, pressure, etc.) during the running of the engine to ensure that the structure of the parts does not leak. In this process, the cylinder hole sealing structure is used to seal the cylinder hole. The structure holes on the cylinder head joint surface of the engine body are distributed differently and the number is large. The sealing structure for sealing these holes is heavy in design, inconvenient for workers to operate, and the sealing effect gradually deteriorates under the action of high-pressure medium after a period of use, which cannot meet the requirements of the sealing test. SUMMARY

[0003] Therefore, the present application aims to overcome the above-mentioned problems in the prior art and provides a diesel engine body cylinder hole sealing structure.

[0004] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0005] A diesel engine body cylinder hole sealing structure, comprising a sealing plate, bolts, a screw rod, a top head and a sealing gasket, the sealing plate is fixed to the cylinder surface of the diesel engine by a plurality of bolts, a through hole is formed on the sealing plate corresponding to each cylinder hole on the cylinder surface, a plurality of plugging holes are formed around each through hole, and the plugging holes correspond to the water holes on the cylinder surface, the screw rod is screwed into the plugging hole, and the movable top head is connected at the end of the screw rod, and the sealing gasket is sleeved in front of the top head.

[0006] Further, mounting holes are provided on both sides of each plugging hole on the sealing plate, and the mounting holes correspond to the connecting holes on the cylinder surface. The sealing plate is fixed to the cylinder surface by the cooperation of the bolts, mounting holes and connecting holes.

[0007] Further, a threaded hole is arranged at the middle of the rear end face of the top head, a movable slot is arranged in the top head and is communicated with the threaded hole, the cross-sectional dimension of the movable slot is larger than that of the threaded hole, a connecting block is arranged at the end of the screw rod, a connecting table with a cross-sectional dimension larger than that of the connecting block is arranged at the front end of the connecting block, and an external thread is arranged on the circumferential surface of the connecting table, the connecting table can be screwed in the threaded hole of the top head and can pass through the threaded hole and enter the movable slot, a connecting column is arranged at the middle of the front part of the top head, a limiting block with a cross-sectional dimension larger than that of the connecting column is arranged at the front side of the connecting column, and the sealing gasket is sleeved on the connecting column.

[0008] Further, the center axes of the movable slot and the threaded hole are arranged coincidently.

[0009] Further, the top head, the connecting column and the limiting block are integrally formed.

[0010] Further, the front side of the limiting block is arranged as a spherical surface structure.

[0011] Compared with the prior art, the present application has the following advantages:

[0012] The diesel engine cylinder hole sealing structure of the present application fixes the screw rod on the sealing plate, connects the top head at the end of the screw rod, and arranges the sealing gasket on the top head, so that the top head is connected at the end of the screw rod and can also move, realizing flexible contact with the cylinder surface of the engine body and not damaging the joint surface of the engine body. Here, the top head is used to block the water hole on the cylinder surface of the engine body, when water leakage occurs, the screw rod can be adjusted to change the pressing force on the top head, so that the top head can be pressed more tightly to seal the water hole. The top head can be adjusted by the screw rod, which can conveniently adjust the situation that the sealing plate is not parallel to the cylinder surface of the engine body after installation, and ensure that each water hole can be well sealed. The structure is convenient to install and maintain, the sealing is adjustable, and the sealing performance is good. BRIEF DESCRIPTION OF DRAWINGS

[0013] The drawings constituting a part of the present application are used to provide a further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0014] Figure 1 The sealing state diagram of the diesel engine cylinder hole sealing structure of the present application is shown on the cylinder head of the engine body;

[0015] Figure 2 The sealing state diagram of the diesel engine cylinder hole sealing structure of the present application is shown on the cylinder head of the engine body; Figure 1 The sectional view in the direction of A-A in the diesel engine cylinder hole sealing structure of the present application;

[0016] Figure 3 The sectional view in the direction of A-A in the diesel engine cylinder hole sealing structure of the present application; Figure 2 The enlarged view of the part B in the diesel engine cylinder hole sealing structure of the present application;

[0017] Explanation of reference signs:

[0018] 1, sealing plate; 11, mounting hole; 12, plugging hole; 13, through hole; 2, bolt; 3, screw; 31, connecting block; 32, connecting table; 4, top head; 41, threaded hole; 42, movable groove; 43, connecting column; 44, limiting block; 45, spherical surface; 5, sealing gasket; 6, cylinder surface of machine body. DETAILED DESCRIPTION

[0019] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0020] In the description of the present application, 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 the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0021] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0022] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0023] As shown in the figure, a diesel engine cylinder hole sealing structure comprises a sealing plate 1, bolts 2, screws 3, a top head 4 and a sealing gasket 5, the sealing plate 1 is fixed on the cylinder surface 6 of the diesel engine through the bolts 2, a through hole 13 is formed on the sealing plate 1 corresponding to each cylinder hole on the cylinder surface 6, a plurality of plugging holes 12 are formed around each through hole 13, the plugging holes 12 correspond to the water holes on the cylinder surface 6, the screws 3 are screwed in the plugging holes 12, the movable top head 4 is connected at the end of the screw 3, and the sealing gasket 5 is sleeved on the front part of the top head 4. In this embodiment, when installing, the sealing plate 1 is placed on the cylinder surface 6, the through hole 13 is aligned with the cylinder hole, the sealing plate 1 is fixed through the bolts 2, the top head 4 is driven by the screw 3 to approach the water hole, and then the top head 4 is tightly pressed, so that the sealing gasket 5 on the front part of the top head 4 is pressed against the edge of the water hole to avoid water leakage.

[0024] A mounting hole 11 is arranged on each side of the plugging hole 12 of the sealing plate 1, the mounting hole 11 corresponds to the connecting hole on the cylinder surface 6, and the sealing plate 1 is fixed on the cylinder surface 6 through the cooperation of the bolts 2, the mounting holes 11 and the connecting holes. In this embodiment, the bolts 2 are arranged on each side of the plugging hole 12 to ensure the fastening and stability of the sealing plate 1 near the plugging hole 12.

[0025] A threaded hole 41 is formed in the middle of the rear end surface of the top head 4, a movable groove 42 is formed in the inside of the top head 4 and communicates with the threaded hole 41, the cross-sectional size of the movable groove 42 is larger than that of the threaded hole 41, a connecting block 31 is arranged at the end of the screw 3, a connecting table 32 with a cross-sectional size larger than that of the connecting block 31 is arranged at the front end of the connecting block 31, an outer thread is arranged on the circumferential surface of the connecting table 32, the connecting table 32 can be screwed in the threaded hole 41 of the top head 4 and can pass through the threaded hole 41 to enter the movable groove 42, a connecting column 43 is arranged in the middle of the front part of the top head 4, a limiting block 44 with a cross-sectional size larger than that of the connecting column 43 is arranged on the front side of the connecting column 43, and the sealing gasket 5 is sleeved on the connecting column 43 and is limited by the limiting block 44. In this embodiment, the top head 4 cannot fall out after being screwed into the screw 3, but relative movement can still occur between the top head 4 and the screw 3, and flexible contact with the cylinder surface 6 is achieved to avoid damage to the cylinder surface. In this embodiment, the screw 3 can conveniently adjust the situation that the sealing plate 1 is not parallel to the cylinder surface 6 after installation, and ensure that each water hole of the cylinder can be well sealed.

[0026] The center axes of the movable groove 42 and the threaded hole 41 are arranged to coincide.

[0027] The top head 4, the connecting column 43 and the limiting block 44 are integrally formed.

[0028] The front side of the limiting block 44 is arranged as a spherical surface 45 structure to facilitate the sealing of the water hole on the cylinder surface 6.

[0029] In the embodiment, the sealing structure adopts 45# steel material, is convenient for processing, has simple structure, introduces light weight design concept, and saves time and labor in installation operation.

[0030] The working process of the embodiment is as follows:

[0031] The screw rod 3 is screwed into the sealing plate 1 and forms a consistent height, subsequent adjustment is convenient, the sealing gasket 5 is installed on the top head 4, the top head 4 is screwed into the aforementioned installed screw rod 3, the sealing plate 1 is placed on the cylinder surface 6 of the machine body to perform preliminary adjustment, after leveling, the bolt 2 is installed into the connecting hole to perform pre-tightening. After the sealing structure is installed, pressure test is performed, if there is still water leakage phenomenon of individual water holes after pressure rises, the screw rod 3 is slightly adjusted to perform rubber pad pressure adjustment, until the water hole does not leak water.

[0032] The above only describes the preferred embodiment of the present application and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A diesel engine cylinder bore sealing structure, characterized in that: It includes a sealing plate, bolts, screws, a plug and a sealing gasket. The sealing plate is fixed to the cylinder surface of the diesel engine by multiple bolts. The sealing plate is provided with a through hole corresponding to each cylinder hole on the cylinder surface of the engine body. Multiple blocking holes are provided around each through hole, and the blocking holes correspond to the water holes on the cylinder surface of the engine body. The screw is screwed into the blocking hole, and a movable plug is connected to the end of the screw. The sealing gasket is sleeved on the front of the plug. A threaded hole is provided in the middle of the rear end surface of the mandrel, and a movable groove connected to the threaded hole is provided inside the mandrel, and the cross-sectional size of the movable groove is larger than the cross-sectional size of the threaded hole. A connecting block is provided at the end of the screw, and a connecting platform with a cross-sectional size larger than the cross-sectional size of the connecting block is provided at the front end of the connecting block, and an external thread is provided on the circumferential surface of the connecting platform. The connecting platform can be screwed to the threaded hole of the mandrel and can pass through the threaded hole into the movable groove. A connecting column is provided in the middle of the front part of the mandrel, and a limit block with a cross-sectional size larger than the cross-sectional size of the connecting column is provided on the front side of the connecting column, and a sealing gasket is sleeved on the connecting column.

2. A diesel engine cylinder bore sealing structure according to claim 1, characterized in that: There are mounting holes on both sides of each blocking hole in the sealing plate, and the mounting holes correspond to the connecting holes on the cylinder surface of the body. The sealing plate is fixed to the cylinder surface of the body through the cooperation of bolts, mounting holes and connecting holes.

3. The diesel engine cylinder bore sealing structure according to claim 1, characterized in that: The movable groove and the central axis of the threaded hole are arranged to coincide with each other.

4. The diesel engine cylinder bore sealing structure according to claim 1, characterized in that: The top head, connecting column and limiting block are an integrally formed structure.

5. The diesel engine cylinder bore sealing structure according to claim 1, characterized in that: The front side of the limit block is set as a spherical structure.

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