High-pressure oil pipe sealing structure

Abstract

The utility model belongs to the technical field of engines, and discloses a high-pressure oil pipe sealing structure which comprises a base plate, a sealing piece and an elastic piece, a mounting hole is formed in the base plate, a sleeving part is arranged in the mounting hole, the sleeving part is provided with a through hole, and a first lip part and a second lip part are arranged on the two sides of the through hole respectively. The first lip part is used for circumferentially sealing the oil pipe locking nut, the second lip part is used for axially sealing the cylinder head cover, the elastic piece is embedded in the first lip part, and under the contraction action of the elastic piece, the contraction effect on circumferential sealing of the first lip part is achieved, so that the first lip part can still be effectively pressed on the outer side of the oil pipe locking nut, the sealing performance is good, and the service life of the oil pipe locking nut is prolonged. The oil pipe locking nut of the high-pressure oil pipe can be circumferentially sealed in a small space, it is guaranteed that the high-pressure oil pipe can still be reliably sealed under the large vibration load, meanwhile, axial end face sealing of the cylinder head cover is achieved, and reliable sealing can still be kept after long-time work.

Description

TECHNICAL FIELD

[0001] The utility model relates to engine technical field especially relates to high pressure oil pipe sealing structure. BACKGROUND

[0002] The high pressure oil pipe of diesel engine is installed through the cylinder cover, and a stepped hole is arranged on the cylinder cover, and a skeleton oil seal is arranged in the stepped hole to realize the sealing of the high pressure oil pipe penetrating into the cylinder cover, but in order to meet the lightweight requirements of reducing the weight and size of the whole machine, the position of the cylinder cover is insufficient to arrange the skeleton oil seal, so that the sealing effect cannot be realized.

[0003] In order to solve the above problems, the traditional O-shaped ring structure or multi-lip sealing is adopted, but due to the large vibration of the high pressure oil pipe during work, the O-shaped ring or multi-lip will deform, crack and other conditions after a long time of work, thereby leading to sealing failure.

[0004] Therefore, the high pressure oil pipe sealing structure is needed to solve the above problems. INVENTION CONTENTS

[0005] The utility model discloses a high pressure oil pipe sealing structure, which is used for circumferential sealing of the oil pipe locking nut and axial sealing of the cylinder cover, and can ensure reliable sealing of the high pressure oil pipe under large vibration load.

[0006] In order to solve the above problems existing in the prior art, the utility model adopts the following technical scheme:

[0007] The high pressure oil pipe sealing structure comprises:

[0008] A base plate is provided with a mounting hole;

[0009] A sealing element is provided, which comprises a sleeve joint part, a first lip part and a second lip part. The sleeve joint part is arranged in the mounting hole, and has a through hole for the oil pipe locking nut. The first lip part and the second lip part are arranged on both sides of the through hole along the circumferential direction of the sleeve joint part. The first lip part is sealingly connected to the outer periphery of the oil pipe locking nut along the central axis direction of the sleeve joint part, and the second lip part is sealingly connected to the end face of the cylinder cover.

[0010] An elastic element is embedded in the first lip part to press the first lip part against the oil pipe locking nut.

[0011] Preferably, the diameter of the first lip part is slightly smaller than the pipe diameter of the oil pipe locking nut.

[0012] Preferably, the diameter of the second lip part is slightly larger than the diameter of the first lip part.

[0013] Preferably, the outer diameter of the second lip portion gradually decreases in the direction of the substrate towards the cylinder head cover, and the inner diameter of the second lip portion is constant.

[0014] Preferably, the longitudinal section shape of the second lip portion is a triangular structure.

[0015] Preferably, the elastic member, the first lip portion and the second lip portion are all annular structures.

[0016] Preferably, the high-pressure oil pipe sealing structure further comprises a connecting piece, the substrate further has a communication hole, the cylinder head cover has a connecting hole, and the connecting piece passes through the communication hole and is connected to the connecting hole.

[0017] Preferably, the number of communication holes is two, the two communication holes are respectively arranged on the two sides of the mounting hole, and the number of connecting pieces is two, the two connecting pieces are respectively arranged one-to-one corresponding to the communication holes.

[0018] Preferably, the sleeve portion, the first lip portion and the second lip portion are integrally formed.

[0019] Preferably, the sealing member is made of rubber material.

[0020] The beneficial effects of the utility model are:

[0021] The high-pressure oil pipe sealing structure provided by the utility model has the following beneficial effects: the substrate has a mounting hole, the sealing member comprises a sleeve portion, a first lip portion and a second lip portion, the sleeve portion is arranged in the mounting hole, the sleeve portion has a through hole for the oil pipe locking nut to pass through, the first lip portion and the second lip portion are respectively arranged on the two sides of the through hole, the first lip portion is used for circumferentially sealing the oil pipe locking nut, the second lip portion is used for axially sealing the cylinder head cover, and the elastic member is embedded in the first lip portion. When the high-pressure oil pipe generates large vibration in work, the elastic member has a contraction effect on the circumferential sealing of the first lip portion, so that the first lip portion can still be effectively pressed on the outside of the oil pipe locking nut, the sealing performance is good, meanwhile, the elastic member is completely isolated from the external air and will not be affected by external factors to fail. The oil pipe locking nut of the high-pressure oil pipe is circumferentially sealed in a small space, the high-pressure oil pipe can still be reliably sealed under large vibration load, meanwhile, the axial end face of the cylinder head cover is sealed, and the sealing reliability can still be maintained after long time work. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a first installation schematic view of the high-pressure oil pipe sealing structure provided by the utility model embodiment;

[0023] Figure 2The second installation schematic view of the high-pressure oil pipe sealing structure is provided for the embodiment of the utility model.

[0024] Figure 3 The first structure schematic view of the high-pressure oil pipe sealing structure is provided for the embodiment of the utility model.

[0025] Figure 4 The second structure schematic view of the high-pressure oil pipe sealing structure is provided for the embodiment of the utility model.

[0026] Figure 5 The cross-sectional view of the high-pressure oil pipe sealing structure is provided for the embodiment of the utility model.

[0027] Figure 6 For Figure 5 The local enlarged view of A in the middle.

[0028] Reference signs:

[0029] 100, high-pressure oil pipe; 200, oil pipe locking nut; 300, cylinder head cover; 301, connecting hole;

[0030] 1, base plate; 11, communicating hole;

[0031] 2, sleeve joint part; 21, through hole;

[0032] 3, first lip part;

[0033] 4, elastic piece;

[0034] 5, second lip part. DETAILED DESCRIPTION

[0035] The utility model will be further explained in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0036] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, 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 or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0037] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature "on", "above" and "upper surface" of second feature include that first feature is directly above and obliquely above second feature, or only indicate that first feature horizontal height is higher than second feature. First feature "under", "below" and "under surface" of second feature include that first feature is directly below and obliquely below second feature, or only indicate that first feature horizontal height is less than second feature.

[0038] In the description of the embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, 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, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0039] As shown in the figure, Figures 1-6 In the embodiment, the high-pressure oil pipe 100 sealing structure includes a base plate 1, a sealing element and an elastic element 4. The base plate 1 is provided with a mounting hole, the sealing element includes a sleeve part 2, a first lip part 3 and a second lip part 5, the sleeve part 2 is arranged in the mounting hole, the sleeve part 2 has a through hole 21 for the oil pipe locking nut 200 to pass through, the first lip part 3 and the second lip part 5 are arranged on both sides of the through hole 21 respectively, along the circumferential direction of the sleeve part 2, the first lip part 3 is sealingly connected to the outer periphery of the oil pipe locking nut 200, along the central axis direction of the sleeve part 2, the second lip part 5 is sealingly connected to the end face of the cylinder head cover 300, and the elastic element 4 is embedded in the first lip part 3, so that the first lip part 3 is pressed against the oil pipe locking nut 200.

[0040] Specifically, the middle position of the substrate 1 is provided with a mounting hole, the sealing member is fixedly installed on the substrate 1 through the mounting hole, the through hole 21 side of the sleeve part 2 is provided with the first lip part 3, the first lip part 3 is sleeved on the outer periphery of the oil pipe locking nut 200, along the circumferential direction of the sleeve part 2, the first lip part 3 is used for circumferentially sealing the oil pipe locking nut 200. The inside of the first lip part 3 is covered with the elastic member 4, the elastic member 4 is a compression spring, the elastic member 4, the first lip part 3 and the second lip part 5 are all annular structures. When the high-pressure oil pipe 100 generates large vibration in work, under the contraction effect of the elastic member 4, the circumferential sealing of the first lip part 3 has a contraction effect, so that the first lip part 3 can still be effectively pressed on the outside of the oil pipe locking nut 200, and the sealing performance is good. At the same time, the elastic member 4 is completely isolated from the outside air, and will not be affected by external factors and fail. The other side of the through hole 21 of the sleeve part 2 is provided with the second lip part 5, along the central axis direction of the sleeve part 2, the second lip part 5 is in close contact with the end face of the cylinder head cover 300, and the second lip part 5 is used for axially sealing the cylinder head cover 300. The circumferential sealing of the oil pipe locking nut 200 of the high-pressure oil pipe 100 in a small space is realized, the sealing reliability of the high-pressure oil pipe 100 under large vibration load is ensured, and at the same time, the axial end face sealing of the cylinder head cover 300 is realized, and the sealing reliability can still be maintained after long time work.

[0041] Further, referring to Figure 1 , the caliber of the first lip part 3 is slightly smaller than the pipe diameter of the oil pipe locking nut 200. Specifically, the caliber of the first lip part 3 is determined by the pipe diameter of the oil pipe locking nut 200, the first lip part 3 has a certain amount of interference, which ensures that the first lip part 3 is interference-fitted with the oil pipe locking nut 200, the connection is firm, and the sealing performance is good.

[0042] Further, referring to Figures 3-5 , the caliber of the second lip part 5 is slightly larger than the caliber of the first lip part 3. Specifically, the difference between the caliber of the first lip part 3 and the second lip part 5 is less than 9mm, and the caliber of the second lip part 5 is slightly larger than the pipe diameter of the oil pipe locking nut 200, which can effectively reduce the installation space arrangement requirement of the cylinder head cover 300, reduce the volume of the cylinder head cover 300, so that the sealing can be realized in a small space, and the cost is reduced.

[0043] Further, referring to Figure 2 and Figure 5, the outer diameter of the second lip portion 5 gradually decreases in the direction of the substrate 1 towards the cylinder head cover 300, and the inner diameter of the second lip portion 5 is constant. Specifically, the longitudinal cross-sectional shape of the second lip portion 5 is a triangular structure, which is a right-angled triangle, that is, the height H of the second lip portion 5 near the inner side is higher, and the height h of the outer side gradually decreases, the height H is used to control the compression amount of the sealing structure of the second lip portion 5 during assembly, which not only meets the sealing requirements, but also ensures that the end face of the substrate 1 can be completely matched with the end face of the cylinder head cover 300. The cross-sectional shape of the triangular structure can ensure that the second lip portion 5 tilts to the same side during assembly, avoiding the formation of leakage points due to the compression of the second lip portion 5.

[0044] Further, with reference to Figure 1 , the high-pressure oil pipe 100 sealing structure further comprises a connecting piece, the substrate 1 is further provided with a communication hole 11, and the cylinder head cover 300 is provided with a connecting hole 301, and the connecting piece passes through the communication hole 11 and is connected to the connecting hole 301. Specifically, the connecting piece is a bolt, the number of communication holes 11 is two, the two communication holes 11 are respectively arranged on both sides of the mounting hole, and the number of connecting pieces is two, and the two connecting pieces are respectively arranged one by one corresponding to the corresponding communication holes 11. During assembly of the sealing structure, grease is pre-applied to the outside of the oil pipe locking nut 200, the first lip portion 3 and the second lip portion 5, then the sealing member is sleeved on the oil pipe locking nut 200, and after the high-pressure oil pipe 100 is assembled, the substrate 1 is assembled on the cylinder head cover 300 through the connecting piece, and the connecting piece is locked. The compression degree of the second lip portion 5 is controlled by the adhesion of the two side metal support plates of the substrate 1 to the cylinder head cover 300, and the compression amount is controlled to the distance from the protruding second lip portion 5 to the adhesion surface of the metal support plate to the cylinder cover, which effectively prevents poor sealing caused by excessive compression or insufficient compression. The sealing member is made of rubber material, and the connecting piece will not cause the problem of unreliable locking due to the sealing member of rubber material. When it is necessary to disassemble the high-pressure oil pipe 100, the locked connecting piece is first loosened, and then the oil pipe locking nut 200 is disassembled, which is convenient for disassembly and maintenance and simple to operate.

[0045] Preferably, the sleeve portion 2, the first lip portion 3 and the second lip portion 5 are integrally formed, that is, the sealing member is a whole structure, which is made of rubber material, and the substrate 1 is once stamped by metal material, which saves cost, and the metal substrate 1 and the rubber sealing member are simultaneously sealed and combined with the cylinder head cover 300, which not only ensures the compression amount of the sealing member, but also ensures that the sealing member can be reliably installed on the cylinder head cover 300.

[0046] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A high-pressure oil pipe (100) sealing structure characterized by comprising: The utility model relates to a high pressure oil pipe (100) sealing structure, which comprises a substrate (1) with a mounting hole, a sealing element, an elastic element (4) and a connecting element. The sealing element comprises a sleeve part (2), a first lip part (3) and a second lip part (5), the sleeve part (2) is arranged in the mounting hole, the sleeve part (2) has a through hole (21) for the oil pipe lock nut (200) to pass through, the first lip part (3) and the second lip part (5) are arranged on both sides of the through hole (21) respectively, the first lip part (3) is sealingly connected to the outer periphery of the oil pipe lock nut (200) along the circumferential direction of the sleeve part (2), and the second lip part (5) is sealingly connected to the end face of the cylinder head cover (300) along the central axis direction of the sleeve part (2). The elastic element (4) is embedded in the first lip part (3) to press the first lip part (3) against the oil pipe lock nut (200). The diameter of the first lip part (3) is slightly smaller than the pipe diameter of the oil pipe lock nut (200).

2. The high pressure oil pipe (100) sealing structure according to claim 1, characterized in that, The diameter of the second lip part (5) is slightly larger than the diameter of the first lip part (3).

3. The high pressure oil pipe (100) sealing structure according to claim 1, characterized in that, The outer diameter of the second lip part (5) gradually decreases along the direction of the substrate (1) towards the cylinder head cover (300), and the inner diameter of the second lip part (5) remains unchanged.

4. The high pressure oil pipe (100) sealing structure according to claim 1, characterized in that, The longitudinal section shape of the second lip part (5) is a triangular structure.

5. The high pressure oil pipe (100) sealing structure according to claim 1, characterized in that, The elastic element (4), the first lip part (3) and the second lip part (5) all have a ring structure.

6. The high pressure oil pipe (100) sealing structure according to claim 1, characterized in that, The high pressure oil pipe (100) sealing structure further comprises a connecting element, the substrate (1) is further provided with a communication hole (11), the cylinder head cover (300) is provided with a connecting hole (301), and the connecting element passes through the communication hole (11) and is connected to the connecting hole (301).

7. The high pressure oil pipe (100) sealing structure according to claim 1, characterized by, The number of communication holes (11) is two, the two communication holes (11) are arranged on both sides of the mounting hole respectively, and the number of connecting elements is two, the two connecting elements are arranged one by one corresponding to the communication holes (11) respectively.

8. The high pressure oil pipe (100) sealing structure according to claim 7, characterized in that, The sleeve part (2), the first lip part (3) and the second lip part (5) are integrally formed.

9. The high pressure oil pipe (100) sealing structure according to claim 1, characterized in that, The sealing element is made of rubber material.

10. The high pressure oil pipe (100) sealing structure according to claim 1, characterized in that, ​

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