Combustion engine composite cylinder gasket reliable in installation

Abstract

The utility model discloses an internal combustion engine composite cylinder gasket reliable in installation, and belongs to the technical field of engine sealing. The internal combustion engine composite cylinder gasket reliable in installation comprises a composite gasket body, a plurality of cylinder holes and a plurality of bolt holes are formed in the composite gasket body, bolt hole gaskets are arranged in the bolt holes, and the bolt hole gaskets are wrapped by bolt hole protection rings and limited on the composite gasket body. According to the composite cylinder gasket of the internal combustion engine, the bolt hole gasket is arranged in the bolt hole of the composite gasket body through the bolt hole protective ring, the compressive strength of the bolt hole is enhanced through the bolt hole protective ring and the gasket, the periphery of the composite gasket body is supported and limited, and when a bolt is used for locking, locking force acts on the bolt hole protective ring and the gasket, so that the locking effect is good. Deformation of the cylinder body or the cylinder cover is prevented, the problems that the composite cylinder gasket is damaged due to extrusion of the bolt and the bolt is prone to loosening are solved, the service life of the composite cylinder gasket is prolonged, and sealing reliability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cylinder gasket of internal combustion engine more specifically, relate to a reliable installation composite cylinder gasket of internal combustion engine. BACKGROUND

[0002] The cylinder gasket is installed between the cylinder body and the cylinder cover, which can compensate for the deformation caused by thermal load and achieve sealing effect. At the same time, the cylinder gasket is provided with water distribution holes, oil holes and bolt holes, etc. The liquid water and liquid oil on the cylinder body reach the cylinder cover through the water distribution holes and oil holes, and the bolt holes are used for connecting the bolts.

[0003] At present, the cylinder gaskets on the market are usually divided into two categories: one is a full-metal cylinder gasket, which has strong impact resistance and good sealing effect on the cylinder, but has high manufacturing cost, high manufacturing difficulty, low manufacturing efficiency and poor sealing performance of oil holes and water holes. The other is a composite cylinder gasket, which has good water sealing and oil sealing effect, high mechanical strength, strong impact resistance and good sealing effect of cylinder holes. For the composite cylinder gasket, the applicant has proposed relevant technical solutions, such as patent publication No. CN108412633B discloses "a multi-cylinder internal combustion engine cylinder gasket and its manufacturing method", and patent publication No. CN110513215A discloses "a composite metal sealing cylinder gasket of internal combustion engine", etc. Through the improvement of the metal ring and the guard ring in the cylinder hole, the strength of the sealing part between the adjacent cylinder holes of the composite gasket body is strengthened, and the cylinder hole sealing effect of the composite cylinder gasket is improved. However, the applicant found that during the use of the above-mentioned composite cylinder gasket, since it is installed between the cylinder body and the cylinder cover, and the cylinder body and the cylinder cover are locked by a plurality of bolts, the locking force of the bolts will directly extrude the cylinder gasket during the locking of the bolts. Since the gasket body itself has a certain elasticity, the locking force of the bolts will directly act on the gasket body around the bolt hole, which will cause the following adverse effects:

[0004] 1) Since the gasket body has a certain elasticity, and the cylinder body and the cylinder cover are limited by the metal ring and the guard ring with good rigidity at the cylinder hole, when the bolt pre-tightening force is large, the gasket body around will be extruded to produce a certain deformation, which will cause the deformation of the cylinder body or the cylinder cover after the bolt is locked;

[0005] 2) Due to the elastic characteristics of the gasket body, the stress of the cylinder hole of the composite cylinder gasket and the stress around are not uniform, and the deformation of the cylinder body or the cylinder cover will easily extrude the gasket body at the bolt hole and cause damage, affecting the sealing performance; and the bolt is also prone to looseness under vibration working condition. SUMMARY

[0006] 1. The technical problem to be solved by the utility model

[0007] The utility model discloses a reliable installation's internal combustion engine composite cylinder gasket, adopt the utility model discloses the technical scheme, set bolt hole washer through bolt hole retainer ring in the bolt hole of composite pad body, utilize bolt hole retainer ring and washer and strengthen the compression strength of bolt hole place, play the support limiting effect of composite pad body all around, when using bolt locking, locking force acts on bolt hole retainer ring and washer, reduce the extrusion to composite pad body, effectively solve the problem of composite cylinder gasket because bolt extrusion damage and bolt easy loosening, make cylinder hole and thread hole retainer ring part of cylinder gasket stress greater, more uniform simultaneously, improve the service life and sealing reliability of composite cylinder gasket, and prevent cylinder body or cylinder cover deformation.

[0008] 2. Technical scheme

[0009] To achieve the above object, the utility model provides a technical scheme:

[0010] A reliable installation's internal combustion engine composite cylinder gasket, comprising a composite pad body, the composite pad body has a plurality of cylinder holes and a plurality of bolt holes, the bolt hole is equipped with bolt hole washer, and the bolt hole washer is wrapped and positioned on the composite pad body by the bolt hole retainer ring.

[0011] Further, the outer diameter of the bolt hole washer is less than the inner diameter of the bolt hole opened on the composite pad body, the bolt hole retainer ring is wrapped on the two sides of the bolt hole washer by the outward flanging of the inner hole of the bolt hole washer, and the flanging edge of the bolt hole retainer ring is pressed on the composite pad body.

[0012] Further, the thickness of the bolt hole washer is not greater than the thickness of the composite pad body.

[0013] Further, the thickness of the bolt hole reinforcing ring formed by the combination of the bolt hole retainer ring and the bolt hole washer is consistent or basically consistent with the thickness of the reinforcing ring at the cylinder hole opening of the composite cylinder gasket.

[0014] Further, the composite pad body is a steel frame graphite composite pad or a steel frame fiber composite pad.

[0015] Further, the material of the bolt hole retainer ring and the bolt hole washer is copper or iron or stainless steel.

[0016] 3. Beneficial effects

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) The utility model discloses a reliable installation's internal -combustion engine composite cylinder gasket, it includes composite pad body, and the composite pad body has a plurality of cylinder holes and a plurality of bolt holes, and the bolt hole is equipped with bolt hole washer, and the bolt hole washer is wrapped by bolt hole retainer and is located on the composite pad body, and the bolt hole retainer and washer enhance the compression strength at the bolt hole, and play the support limiting effect of the composite pad body all around, when using the bolt locking, locking force acts on the bolt hole retainer and washer, reduces the extrusion to the composite pad body, effectively solves the problem of the composite cylinder gasket because of bolt extrusion damage and bolt easy loosening, simultaneously makes the cylinder hole and thread hole retainer part of cylinder gasket force greater, more uniform, improves the service life and sealing reliability of composite cylinder gasket, and prevents the deformation of cylinder block or cylinder cover,

[0019] (2) The utility model discloses a reliable installation's internal -combustion engine composite cylinder gasket, and the outer diameter of bolt hole washer is less than the bolt hole inner diameter that sets up on the composite pad body, and the bolt hole retainer is wrapped on the two sides of bolt hole washer by the inner hole of bolt hole washer to the outside, and the flanging edge of bolt hole retainer is pressed on the composite pad body, and the structure is simple, and the preparation is convenient,

[0020] (3) The utility model discloses a reliable installation's internal -combustion engine composite cylinder gasket, and the thickness of bolt hole washer is not greater than the thickness of composite pad body, so that the thickness after setting bolt hole retainer is basically same with the thickness of composite pad body, guarantees the sealing reliability of composite cylinder gasket,

[0021] (4) The utility model discloses a reliable installation's internal -combustion engine composite cylinder gasket, and the thickness of bolt hole retainer and bolt hole washer combination formed bolt hole reinforcing ring is same or basically same with the thickness of the reinforcing ring at the cylinder hole orifice of composite cylinder gasket, so that the reinforcing ring stress of bolt hole is greater, and is close to the reinforcing ring stress at the cylinder hole orifice, further improves the connection stress uniformity of cylinder block and cylinder cover,

[0022] (5) The utility model discloses a reliable installation's internal -combustion engine composite cylinder gasket, and the composite pad body is steel frame graphite composite pad or steel frame fiber composite pad, and the material of bolt hole retainer and bolt hole washer is copper or iron or stainless steel or metal, and the composite pad body is good in water sealing and oil sealing effect, and the retainer and washer are good in rigidity, and the locking firmness of bolt is improved. ACCURACY OF DRAWINGS

[0023] Figure 1 It is the structure schematic drawing of the utility model discloses a reliable installation's internal -combustion engine composite cylinder gasket,

[0024] Figure 2 It is Figure 1 The local section structure schematic drawing of A-A direction in,

[0025] The label explanation in schematic diagram:

[0026] 1. Composite pad; 1a. Steel frame; 1b. Composite material; 1-1. Cylinder bore; 1-2. Bolt hole; 2. Bolt hole retainer; 3. Bolt hole washer. Detailed Implementation

[0027] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0028] [Example]

[0029] Combination Figure 1 and Figure 2 As shown in this embodiment, a reliable composite cylinder head gasket for an internal combustion engine includes a composite gasket body 1. The composite gasket body 1 has a plurality of cylinder bores 1-1 and a plurality of bolt holes 1-2. The number of cylinder bores 1-1 depends on the number of cylinders in the internal combustion engine; it can be a single-cylinder or multi-cylinder cylinder head gasket. The number of bolt holes 1-2 depends on the number of bolts connecting the cylinder block and cylinder head, and is generally distributed around the perimeter of the composite gasket body 1. The reinforcing structure of the cylinder bores 1-1 can employ existing technologies, such as the "Multi-cylinder Internal Combustion Engine Cylinder Head Gasket and its Manufacturing Method" disclosed in patent publication number CN108412633B or the "Composite Metal Sealing Cylinder Head Gasket for Internal Combustion Engine" disclosed in patent publication number CN110513215A. By setting reinforcing rings at the cylinder bores 1-1, the strength of the cylinder bore sealing area is enhanced, improving the impact resistance and sealing performance of the composite gasket body 1. Depending on the needs, corresponding oil holes and water holes can also be provided on the composite gasket body 1. Unlike existing composite cylinder head gaskets, in this embodiment, a bolt hole washer 3 is provided inside the bolt hole 1-2. The bolt hole washer 3 is wrapped and confined on the composite gasket body 1 by the bolt hole retaining ring 2. Specifically, during manufacturing, the opening diameter of the bolt hole 1-2 on the composite gasket body 1 is slightly larger than the original bolt hole diameter. After installing the bolt hole retaining ring 2 and the bolt hole washer 3, the hole formed inside the bolt hole retaining ring 2 is the hole through which the bolt passes. Using the above-mentioned bolt hole structure, the bolt hole retaining ring and washer enhance the compressive strength at the bolt hole, providing support and confinement around the composite gasket body. When the bolt is tightened, the tightening force acts on the bolt hole retaining ring and washer, reducing the compression on the composite gasket body. This effectively solves the problems of composite cylinder head gasket damage due to bolt compression and easy bolt loosening. Simultaneously, it allows for greater and more uniform stress on the cylinder hole and threaded hole retaining ring areas of the cylinder head gasket, improving the service life and sealing reliability of the composite cylinder head gasket and preventing deformation of the cylinder block or cylinder head.

[0030] by Figure 1 Taking the internal combustion engine composite cylinder head gasket shown as an example, it has nine bolt holes 1-2 distributed around its perimeter. Each bolt hole 1-2 is reinforced with a bolt hole guard ring 2 and a bolt hole washer 3, making the force distributed more evenly after the bolts are tightened. (Refer to...) Figure 2As shown, the outer diameter of the bolt hole gasket 3 is smaller than the inner diameter of the bolt hole 1-2 formed on the composite gasket body 1, the bolt hole retainer 2 is wrapped on both sides of the bolt hole gasket 3 by flanging the inner hole of the bolt hole gasket 3 outward, and the flanged outer edge of the bolt hole retainer 2 is pressed on the composite gasket body 1. During manufacturing, the bolt hole gasket 3 and the one-side flanged bolt hole retainer 2 can be manufactured in advance, the bolt hole gasket 3 is sleeved on the sleeve of the bolt hole retainer 2, and then they are loaded into the bolt hole 1-2 of the composite gasket body 1 together, the outer diameter of the one-side flanged bolt hole retainer 2 is larger than the inner diameter of the bolt hole 1-2 formed on the composite gasket body 1, so that it is in abutment with the composite gasket body 1, and then the other end of the bolt hole retainer 2 is flanged by the edge pressing equipment and is pressed on the composite gasket body 1. The design is simple in structure and convenient to manufacture.

[0031] Connection Figure 2 As shown, in the embodiment, the thickness of the bolt hole gasket 3 is not greater than the thickness of the composite gasket body 1, and after being pressed, the overall thickness of the bolt hole retainer 2 wrapped on both sides of the bolt hole gasket 3 is equivalent to the thickness of the composite gasket body 1, which ensures the sealing reliability of the composite cylinder gasket. Preferably, the thickness of the bolt hole reinforcing ring formed by the combination of the bolt hole gasket 3 and the bolt hole retainer 2 is consistent or basically consistent with the thickness of the reinforcing ring at the cylinder hole 1-1 port of the composite cylinder gasket, so that the reinforcing ring at the bolt hole is subjected to greater force, and the force is close to that of the reinforcing ring at the cylinder hole port, which further improves the uniformity of the connection force between the cylinder block and the cylinder head, and effectively prevents the cylinder block or the cylinder head from being deformed after locking.

[0032] In the embodiment, the composite gasket body 1 is preferably a steel frame graphite composite gasket or a steel frame fiber composite gasket, which includes a steel frame 1a and a composite material 1b, the steel frame 1a is located on the inner side of the composite material 1b, the steel frame 1a serves as the framework of the gasket body, and the composite material 1b is used to provide sealing and high-temperature stability. When the composite gasket body 1 adopts a steel frame graphite composite gasket, the composite material 1b is a graphite plate; when the composite gasket body 1 adopts a steel frame fiber composite gasket, the composite material 1b is an asbestos fiber plate or a non-asbestos fiber plate. The materials of the above-mentioned bolt hole retainer 2 and bolt hole gasket 3 are preferably copper or iron or stainless steel or other metals, and further, the bolt hole retainer 2 can be made of relatively soft copper for easy flanging and pressing, and the bolt hole gasket 3 can be made of relatively hard iron or stainless steel to provide sufficient rigidity. The composite cylinder gasket of the internal combustion engine has good water and oil sealing effect of the composite gasket body, good rigidity of the retainer and gasket, and improved locking firmness of the bolt.

[0033] The reliable installation of the internal combustion engine composite cylinder gasket uses the composite cylinder gasket installed between the cylinder body and the cylinder cover to realize the channel sealing between the cylinder body and the cylinder cover, the connecting bolt between the cylinder body and the cylinder cover passes through the corresponding bolt hole 1-2 on the composite cylinder gasket, when the bolt is tightened, the locking force acts on the bolt hole gasket 3 and the bolt hole retainer 2, which can prevent excessive extrusion of the composite gasket body 1, balance the stress of the middle and periphery of the composite gasket body 1, and further reduce the deformation of the cylinder body or the cylinder cover caused by the extrusion deformation of the composite gasket body 1 after locking.

[0034] In summary, the reliable installation of the internal combustion engine composite cylinder gasket sets the bolt hole gasket in the bolt hole of the composite gasket body through the bolt hole retainer, uses the bolt hole retainer and the gasket to enhance the compression strength of the bolt hole, plays a supporting and limiting role around the composite gasket body, when the bolt is locked, the locking force acts on the bolt hole retainer and the gasket, reduces the extrusion of the composite gasket body, effectively solves the problems of damage and loose bolt of the composite cylinder gasket due to the bolt extrusion, and makes the cylinder hole and the thread hole retainer part of the cylinder gasket bear more and more uniform stress, improves the service life and sealing reliability of the composite cylinder gasket, and prevents the deformation of the cylinder body or the cylinder cover.

[0035] The above describes the utility model and its embodiments in a schematic manner, which is not restrictive, and the drawings shown are only one of the embodiments of the utility model, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby, without departing from the purpose of the utility model, similar structural modes and embodiments can be designed without creativity, which should belong to the protection scope of the utility model.

Claims

1. A reliable composite cylinder head gasket for an internal combustion engine, comprising a composite gasket body (1), wherein the composite gasket body (1) has a plurality of cylinder bores (1-1) and a plurality of bolt holes (1-2), characterized in that: The bolt hole (1-2) is provided with a bolt hole washer (3), which is wrapped by the bolt hole guard (2) and limited on the composite pad (1).

2. The reliable composite cylinder head gasket for internal combustion engines according to claim 1, characterized in that: The outer diameter of the bolt hole washer (3) is smaller than the inner diameter of the bolt hole (1-2) opened on the composite pad (1). The bolt hole guard ring (2) is turned outward from the inner hole of the bolt hole washer (3) and wrapped around both sides of the bolt hole washer (3). The outer edge of the turned edge of the bolt hole guard ring (2) is pressed onto the composite pad (1).

3. The reliably installed composite cylinder head gasket for internal combustion engines according to claim 2, characterized in that: The thickness of the bolt hole washer (3) is not greater than the thickness of the composite pad (1).

4. The reliably installed composite cylinder head gasket for internal combustion engines according to claim 2, characterized in that: The thickness of the bolt hole reinforcing ring formed by the combination of the bolt hole guard ring (2) and the bolt hole washer (3) is consistent with or basically consistent with the thickness of the reinforcing ring at the opening of the cylinder hole (1-1) of the composite cylinder gasket.

5. The reliably installed composite cylinder head gasket for internal combustion engines according to any one of claims 1 to 4, characterized in that: The composite pad (1) is a steel frame graphite composite pad or a steel frame fiber composite pad.

6. The reliably installed composite cylinder head gasket for internal combustion engines according to claim 5, characterized in that: The bolt hole retainer (2) and bolt hole washer (3) are made of copper, iron or stainless steel.

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