CN213478518U - T-shaped joint surface sealing structure - Google Patents
T-shaped joint surface sealing structure Download PDFInfo
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- CN213478518U CN213478518U CN202022077700.4U CN202022077700U CN213478518U CN 213478518 U CN213478518 U CN 213478518U CN 202022077700 U CN202022077700 U CN 202022077700U CN 213478518 U CN213478518 U CN 213478518U
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Abstract
The utility model discloses a T type faying face seal structure relates to the engine sealing technology field, including gear chamber lid, cylinder body, cylinder cap and jar pad, the same one side of cylinder body and cylinder cap with the gear chamber lid encloses into the gear chamber, the gear chamber lid includes first combination terminal surface, the cylinder body includes second combination terminal surface and third combination terminal surface, the cylinder cap includes fourth combination terminal surface and fifth combination terminal surface, second combination terminal surface, fourth combination terminal surface are parallel with the first combination terminal surface respectively, and the fourth combination terminal surface is relative the interval of first combination terminal surface is greater than the interval of second combination terminal surface relative the first combination terminal surface; the third combination end surface and the fifth combination end surface are respectively vertical to the first combination end surface; the gasket is located between the third and fifth mating end surfaces. The utility model provides an among the device effective solution existing structure, T type faying face oil leak problem that cylinder body and cylinder cap lead to because the material coefficient of thermal expansion difference.
Description
Technical Field
The utility model relates to an engine seal technical field especially relates to a T type faying face seal structure.
Background
In an automobile engine structure, a plurality of T-shaped joint surface sealing structures exist, such as T-shaped joint surfaces formed by a cylinder body, a cylinder cover end surface and a gear chamber cover end surface. Due to the problem of structural design, the problem of oil leakage of the T-shaped joint surface is always a difficult problem which puzzles various engine products.
At present, a silicon-coated instant sealing mode is generally adopted for plane sealing, and the principle of silicon sealing is to absorb moisture in air and form a sealing rubber strip by curing at room temperature, so that the sealing effect is achieved. In order to ensure the strength of the adhesive tape and avoid the falling off of the cured adhesive tape, a long rectangular adhesive containing structure is usually added in the middle of the sealing surface during design. This is true even for the T-shaped joint surface sealing structure. The structure usually leaks under extreme working conditions, and the method for solving the leakage is to glue the area for multiple times, so that the operation wastes silica gel, the consistency and durability of the product are poor, and the production organization and the quality control of the product are not facilitated. The existing T-junction faces also face the following problems:
1. the flatness of the end face of the T-shaped joint face is usually controlled according to the requirement of +/-0.15 mm, the inconsistency of materials of various parts of the T-shaped joint face is not fully considered, the thermal expansion coefficients of the materials are different, the control requirements of the distance between the end faces are different, when the engine works, the part with the large thermal expansion coefficient greatly extends to polish silica gel coated on the end face of the part, after the engine is cooled, the T-shaped joint face is not sealed by the silica gel, oil seepage is prone to happen, and finally the reworking workload and cost waste of the engine are huge.
2. The sealing surface of the gear chamber cover is usually designed to be a smooth surface or the middle part of the sealing surface is provided with a glue containing groove. The sealing surface of the gear chamber cover is designed to be a smooth surface, the smeared silica gel is almost completely extruded along with the silica gel on the fastening sealing surface of the fastening bolt of the gear chamber cover, and the oil leakage is hardly ensured because the silica gel is not sealed. The design of sealed face middle part has the appearance gluey groove, and such design is also not good, should lean on moisture solidification for silica gel, and the appearance gluey groove at middle part will hardly solidify owing to hardly absorb the moisture, keeps liquid for a long time, can't play effective seal.
3. Generally, the higher the machining roughness of the sealing surfaces of the gear chamber cover and the cylinder cover, the better, and meanwhile, because the aluminum product is better in machining, the surface machining roughness easily reaches Ra0.8 or even Ra0.4. But the surface of the part is too smooth, so that the adhesion of silica gel is not facilitated, the silica gel cannot be adhered, and oil leakage is inevitable.
4. The cylinder body and the cylinder cover are usually sealed through cylinder gaskets, and the cylinder gaskets are usually flush with the end faces of the cylinder body and the cylinder cover. Because the aluminum cylinder cover has large thermal expansion coefficient and the steel cylinder cushion, the aluminum cylinder cover deforms far away from the steel cylinder cushion when the engine works, so that silica gel coated on the end face of the cylinder cushion is greatly pulled loose or broken and cannot be firmly attached to the end face of the cylinder cushion, and the oil of the engine leaks from the position.
5. The joint surface of the cylinder body and the cylinder cover is generally designed to flatly press the cylinder gasket, the end surface of the T-shaped joint surface needs to be coated with silica gel for sealing, the cylinder gasket is originally designed to be thin, and when an engine works, the aluminum cylinder cover is thermally expanded, the silica gel in a gap between the end surface of the cylinder body and the end surface of the cylinder cover without the cylinder gasket is further extruded to be thin, so that the repeated sealant is easily broken and separated, and oil seepage is caused.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides a T type faying face seal structure effectively solves current structure, and cylinder body and cylinder cap are because the different T type faying face oil leak problem that leads to of material thermal expansion coefficient.
In order to realize the purpose of the utility model, the technical scheme of the utility model is as follows:
a T-shaped joint surface sealing structure is characterized by comprising a gear chamber cover, a cylinder body, a cylinder cover and a cylinder gasket, wherein the same side of the cylinder body and the cylinder cover and the gear chamber cover enclose a gear chamber, the gear chamber cover comprises a first joint end surface, the cylinder body comprises a second joint end surface and a third joint end surface, the cylinder cover comprises a fourth joint end surface and a fifth joint end surface, wherein,
the second combination end face and the fourth combination end face are respectively parallel to the first combination end face, and the distance between the fourth combination end face and the first combination end face is larger than that between the second combination end face and the first combination end face;
the third combination end surface and the fifth combination end surface are respectively vertical to the first combination end surface;
the gasket is located between the third and fifth mating end surfaces.
Furthermore, an inner slope glue storage groove is formed in the intersection of the first combination end face and the inner wall of the gear chamber cover.
Furthermore, the first combining end surface and the fourth combining end surface are provided with first cross reticulate patterns at corresponding positions.
Further, a glue storage groove is further formed in the inner side of the middle of the first combining end face, and the glue storage groove is opposite to the third combining end face and the fifth combining end face.
Further, a chamfer is arranged at the intersection of the third combination end surface and the side wall of the gear chamber.
Further, the fourth joint end face is provided with a second cross reticulate pattern.
Further, a distance between one end of the gasket facing the first coupling end surface and the first coupling end surface is larger than a distance between the fourth coupling end surface and the first coupling end surface.
Further, the gasket is provided in a zigzag shape at an end facing the first coupling end surface.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model provides a T-shaped joint face seal structure, according to the thermal expansion coefficient of cylinder body and cylinder cover material, control T-shaped joint face cylinder body and cylinder cover and gear chamber cover joint terminal surface's interval respectively, avoid the cylinder cover hot rising when the engine work to crowd the light or pull the glue that the terminal surface was paintd and take off and lead to the oil leak;
2. an inner slope glue storage groove is formed at the intersection of the first combination end face and the inner wall of the gear chamber cover, so that after the bolt between the gear chamber cover and the cylinder body and the cylinder cover is tightened, the silica gel coated on the first combination end face of the gear chamber cover is extruded, and a circle of continuously closed glue line is formed on the first combination end face of the gear chamber cover, the second combination end face of the cylinder body and the fourth combination end face of the cylinder cover to play a role in sealing;
3. the first cross reticulate pattern is arranged on the corresponding part of the first combination end surface and the fourth combination end surface, so that the silica gel is firmly attached to the first combination end surface of the gear chamber cover and is not easy to fall off;
4. the glue storage groove is arranged on the inner side of the middle part of the first combination end face and is over against the third combination end face and the fifth combination end face, and because the thermal expansion coefficient of the aluminum cylinder cover is larger than that of the cylinder body made of cast iron material, the deformation of the fifth combination end face of the cylinder cover is larger than that of the third combination end face of the cylinder body when the engine works, and the glue storage groove can prevent the sealant of the T-shaped combination face, which is positioned on the fourth combination end face and the fifth combination end face of the cylinder cover, from being extruded or sheared off to cause oil leakage;
5. a chamfer is arranged at the intersection of the third combination end surface and the side wall of the gear chamber, so that silica gel coated on the T-shaped combination part is extruded, and a circle of sealed gel line is formed among the cylinder body, the cylinder gasket and the cylinder cover to play a role in sealing;
6. the fourth combination end face is provided with second cross reticulate patterns, so that the silica gel is firmly attached to the fourth combination end face of the cylinder cover and is not easy to fall off;
7. the distance between one end of the cylinder pad facing the first combination end face and the first combination end face is larger than the distance between the fourth combination end face and the first combination end face, so that the silica gel is more firmly attached between the cylinder cover and the cylinder body corresponding to the cylinder pad horn and is not easy to fall off;
8. one end of the cylinder pad, which faces the first combination end face, is arranged in a zigzag manner, so that the attachment of silica gel to the horn end face of the cylinder pad can be effectively improved.
Drawings
FIG. 1 is a schematic perspective view of a gear chamber cover, a cylinder body, a cylinder cover and a cylinder cushion structure according to an embodiment of the present invention;
fig. 2 is a schematic structural view of the T-shaped junction surface sealing structure according to the embodiment of the present invention;
FIG. 3 is an enlarged view of a portion M of FIG. 2;
FIG. 4 is a schematic structural view of a gear chamber cover according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along line D of FIG. 4;
FIG. 6 is a schematic view of a cylinder structure according to an embodiment of the present invention;
FIG. 7 is a sectional view taken along line B of FIG. 6;
FIG. 8 is a schematic view of a cylinder head structure according to an embodiment of the present invention;
FIG. 9 is a cross-sectional view taken along line C of FIG. 8;
fig. 10 is a schematic view of a gasket structure according to an embodiment of the present invention.
In the figure, 1-gear chamber cover, 11-first combined end face, 111-first cross reticulate pattern, 12-inner slope glue storage groove, 13-rectangular glue storage groove, 2-cylinder body, 21-second combined end face, 22-third combined end face, 23-chamfer, 3-cylinder cover, 31-fourth combined end face, 32-fifth combined end face, 311-second cross reticulate pattern, 4-cylinder cushion, 41-claw, 5-positioning pin and 6-gear chamber.
Detailed Description
In order to explain the technical content, the achieved objects and the effects of the present invention in detail, the following description is made in conjunction with the embodiments and the accompanying drawings.
As shown in fig. 1 to 3, a T-shaped joint surface sealing structure includes a gear chamber cover 1, a cylinder body 2, a cylinder cover 3 and a cylinder gasket 4, wherein bosses are respectively arranged on two sides of the same side of the cylinder body 2 and the cylinder cover 3, the same side of the cylinder body 2 and the same side of the cylinder cover 3, a gear chamber is defined by the corresponding bosses and the gear chamber cover 1, the cylinder body 2 is made of cast iron material, and the cylinder cover 3 is made of aluminum material. The gear chamber cover 1 comprises a first combination end surface 11, the cylinder body 2 comprises a second combination end surface 21 and a third combination end surface 22, the cylinder cover 3 comprises a fourth combination end surface 31 and a fifth combination end surface 32, wherein,
the third joint end surface 22 and the fifth joint end surface 32 are respectively perpendicular to the first joint end surface 11;
the second combination end surface 21 and the fourth combination end surface 31 are respectively parallel to the first combination end surface 11, and the first combination end surface 11, the second combination end surface 21, the third combination end surface 22, the fourth combination end surface 31 and the fifth combination end surface 32 form a T-shaped combination surface. The cylinder body 2 and the cylinder cover 3 are respectively sealed and combined through the second combination end face 21, the fourth combination end face 31 and the first combination end face 11 of the gear chamber cover 1 by adopting silica gel; the cylinder body 2 and the cylinder cover 3 are respectively sealed and combined by silica gel through the third combination end surface 22 and the fifth combination end surface 32.
The distance between the fourth joint end face 31 and the first joint end face 11 is greater than the distance between the second joint end face 21 and the first joint end face 11, the difference is H0, and the value of H0 is set according to the thermal expansion coefficients of the cast iron and the aluminum and the actual test results, which are not described herein. Because the thermal expansion coefficient of the aluminum cylinder cover is larger than that of the cylinder body made of cast iron, due to the arrangement of H0, when the engine works, the silicone rubber between the fourth combination end face 31 and the first combination end face 11 is not squeezed or pulled to be loosened to cause oil leakage. In other embodiments, the distance difference H0 between parts made of different materials on the sealing end face in the same direction of the T-shaped joint face can be controlled according to the thermal expansion coefficients of the different materials and the actual test result, so that oil leakage caused by burnishing or pulling and loosening of silica gel coated on the end face due to thermal expansion of the parts when an engine works is avoided.
The cylinder gasket 4 is positioned between the third combination end surface 22 and the fifth combination end surface 32, and a claw 41 is arranged at the corresponding position of the bosses of the cylinder body 2 and the cylinder cover 3.
The positioning among the cylinder cover 3, the cylinder cushion 4 and the cylinder body 2 is realized by controlling the machining size of parts and the positioning pin 5.
Preferably, as shown in fig. 4 and 5, an inner slope glue storage groove 12 is provided at the intersection of the first combining end surface 11 and the inner wall of the gear chamber cover 1, so that after the bolt between the gear chamber cover 1 and the cylinder body 2 and the cylinder cover 3 is tightened, the silica gel coated on the first combining end surface 11 of the gear chamber cover 1 is squeezed, and a circle of continuously closed glue line is formed on the first combining end surface 11 of the gear chamber cover 1, the second combining end surface 21 of the cylinder body 2 and the fourth combining end surface 31 of the cylinder cover 3, thereby achieving a sealing effect.
Preferably, the first cross-hatching 111 is disposed on the first combining end surface 11 and the corresponding portion of the fourth combining end surface 31, so that the silicone rubber is more firmly attached to the first combining end surface 11 of the gear chamber cover 1 and is not easy to fall off.
Preferably, two glue storage grooves 13 are further arranged on the inner side of the middle part of the first combination end surface 11, the length L2 of each glue storage groove 13 is 30mm, the width L1 of each glue storage groove is 5mm, and the depth H2 of each glue storage groove is 3 mm. The glue storage groove 13 is opposite to the third combination end surface 22 and the fifth combination end surface 32, because the thermal expansion coefficient of the aluminum cylinder cover 3 is larger than that of the cylinder body 2 made of cast iron material, the deformation of the fifth combination end surface 32 of the cylinder cover 3 is larger than that of the third combination end surface 22 of the cylinder body 2 when the engine works, and the glue storage groove can prevent the sealant of the T-shaped combination surface positioned on the fourth combination end surface 31 and the fifth combination end surface 32 of the cylinder cover 3 from being extruded or sheared off to cause oil leakage.
Preferably, as shown in fig. 6 and 7, a chamfer 23 is provided at the intersection of the third joint end surface 22 and the side wall of the gear chamber 6, so that the silicone applied to the T-shaped joint is squeezed to form a circle of sealing rubber lines between the cylinder block 2, the cylinder gasket 4 and the cylinder head 3, thereby achieving a sealing effect.
Preferably, as shown in fig. 8 and 9, the fourth joint end surface 31 is provided with a second cross-hatch 311, so that the silicone rubber is more firmly attached to the fourth joint end surface 31 of the cylinder head 3 and is less likely to fall off.
Preferably, the distance between the first coupling end surface 11 and one end of the gasket 4 facing the first coupling end surface 11 (i.e., the end surfaces of the two fillets 41) is greater than the distance between the fourth coupling end surface 31 and the first coupling end surface 11 by a difference of H1, so that the silicone rubber is more firmly attached between the cylinder head 3 and the cylinder block 2 corresponding to the gasket 4 and is less likely to fall off.
Preferably, as shown in fig. 10, the end of the pad 4 facing the first coupling end surface 11 (i.e., the end surfaces of the two horns 41) is zigzag, which can effectively improve the adhesion of the silicone rubber to the end surfaces of the horns 41 of the pad 4.
Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. A T-shaped joint surface sealing structure is characterized by comprising a gear chamber cover (1), a cylinder body (2), a cylinder cover (3) and a cylinder cushion (4), wherein the same side of the cylinder body (2) and the cylinder cover (3) and the gear chamber cover (1) enclose a gear chamber (6), the gear chamber cover (1) comprises a first joint end surface (11), the cylinder body (2) comprises a second joint end surface (21) and a third joint end surface (22), the cylinder cover (3) comprises a fourth joint end surface (31) and a fifth joint end surface (32), wherein,
the second combination end surface (21) and the fourth combination end surface (31) are respectively parallel to the first combination end surface (11), and the distance between the fourth combination end surface (31) and the first combination end surface (11) is larger than the distance between the second combination end surface (21) and the first combination end surface (11);
the third combination end surface (22) and the fifth combination end surface (32) are respectively vertical to the first combination end surface (11);
the gasket (4) is located between the third joint end surface (22) and the fifth joint end surface (32).
2. The T-shaped joint surface sealing structure according to claim 1, wherein an inner slope glue storage groove (12) is arranged at the intersection of the first joint end surface (11) and the inner wall of the gear chamber cover (1).
3. The T-shaped joint face seal structure according to claim 1, wherein a first cross-hatch (111) is provided on the first joint end face (11) at a position corresponding to the fourth joint end face (31).
4. The T-shaped joint surface sealing structure according to claim 1, wherein a glue storage groove (13) is further formed in the inner side of the middle of the first joint end surface (11), and the glue storage groove (13) is opposite to the third joint end surface (22) and the fifth joint end surface (32).
5. The T-shaped joint face sealing structure according to claim 1, wherein a chamfer (23) is provided at the intersection of the third joint end face (22) and the side wall of the gear chamber (6).
6. The T-shaped faying surface sealing structure according to claim 1, characterized in that the fourth faying end surface (31) is provided with a second cross-hatch (311).
7. The T-shaped joint surface sealing structure according to claim 1, wherein a distance between the gasket (4) and the first joint end surface (11) at an end facing the first joint end surface (11) is larger than a distance between the fourth joint end surface (31) and the first joint end surface (11).
8. The T-shaped joint face seal structure according to claim 5, wherein the gasket (4) is provided in a zigzag shape at an end facing the first joint end face (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022077700.4U CN213478518U (en) | 2020-09-21 | 2020-09-21 | T-shaped joint surface sealing structure |
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| CN202022077700.4U CN213478518U (en) | 2020-09-21 | 2020-09-21 | T-shaped joint surface sealing structure |
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| CN213478518U true CN213478518U (en) | 2021-06-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128013A (en) * | 2020-09-21 | 2020-12-25 | 广西玉柴机器股份有限公司 | T-shaped joint surface sealing structure |
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- 2020-09-21 CN CN202022077700.4U patent/CN213478518U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128013A (en) * | 2020-09-21 | 2020-12-25 | 广西玉柴机器股份有限公司 | T-shaped joint surface sealing structure |
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