High-pressure oil pump sealing gasket

Abstract

The utility model discloses a high-pressure oil pump sealing gasket which comprises a metal ring formed by a metal bottom plate in a surrounding mode, and a plurality of fixing holes fixed with an oil pump are formed in the metal ring in the circumferential direction of the metal ring. The sealing body comprises an inner sealing gasket and an outer sealing gasket, the inner sealing gasket is fixed to the inner side of the metal ring in a surrounding mode, and the outer sealing gasket is fixed to the outer side of the metal ring in a surrounding mode. Thus, the inner sealing gasket and the outer sealing gasket are fixed to the inner side and the outer side of the metal ring respectively, the sealing face of the inner sealing gasket bears high-pressure oil liquid in the oil pump, the sealing face of the outer sealing gasket blocks invasion of media such as water, air and silt outside the oil pump and can also seal oil liquid seeping from the inside, and the fixing holes in the metal bottom plate are used for being fixed to the oil pump. And upper and lower shells of the oil pump are conveniently mounted. Therefore, the sealing main body is combined with the metal bottom plate, so that the cost is reduced, the structure is simple, and the sealing performance is good; and the requirements on the surface state of a sealing material and a sealing surface and the requirement on the pre-tightening force of the bolt are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure oil pump technical field especially relates to a high pressure oil pump sealing gasket. BACKGROUND

[0002] Oil pump is a kind of important indispensable device that oil liquid is sent to other oil liquid required site after pressurization.It is widely used in automobile, engineering machinery and other fields. With the development of automobile and engineering machinery, the demand of high pressure oil pump is more and more.

[0003] The sealing of high pressure oil pump is extremely critical, high pressure oil pump sealing gasket is installed between oil pump main body and shell, prevents the oil liquid in oil pump from leaking, also prevents the medium such as air, water, silt outside from entering the inside of oil pump, is one of the key components of high pressure oil pump. How to develop the sealing gasket that is good in sealing performance under high oil pressure, durable and reliable is one of the important work of domestic high pressure sealing industry localization at present.

[0004] The sealing of existing high pressure oil pump generally uses metal seal, and the cost is high, the structure is complex, the sealing material and the surface state of sealing surface are required to be high, and the bolt pre-tightening force is required to be high. CONTENT OF THE UTILITY MODEL

[0005] To solve the technical problems in the background art, the utility model provides a high pressure oil pump sealing gasket.

[0006] The utility model provides a high pressure oil pump sealing gasket, which comprises:

[0007] Metal ring, it is surrounded by metal bottom plate, and a plurality of fixed holes for fixing oil pump are formed on the circumference of the metal ring;

[0008] Sealing body, comprising inner sealing gasket and outer sealing gasket, the inner sealing gasket is fixed on the inner side of the metal ring, and the outer sealing gasket is fixed on the outer side of the metal ring.

[0009] Preferably, the inner sealing gasket and the outer sealing gasket are vulcanized on the inner side and the outer side of the metal ring respectively by adhesive.

[0010] Preferably, the upper and lower end faces of the free end of the inner sealing gasket and the outer sealing gasket are provided with symmetrical convex sealing surfaces along the thickness direction of the metal bottom plate.

[0011] Preferably, the connecting parts of the inner sealing gasket and the metal bottom plate and the connecting parts of the outer sealing gasket and the metal bottom plate are provided with glue sealing grooves.

[0012] Preferably, the inner sealing gasket is provided with an inwardly inclined inner guide bevel, and the outer sealing gasket is provided with an outwardly inclined outer guide bevel.

[0013] Preferably, the sealing body is made of acrylate rubber and rubber processing aids.

[0014] Preferably, the fixing holes are bolt holes I, which correspond to bolt holes II on the oil pump shell.

[0015] In summary, the utility model has the following beneficial effects: by fixing the inner sealing gasket and the outer sealing gasket on the inner side and the outer side of the metal ring respectively, the sealing surface of the inner sealing gasket bears high-pressure oil in the oil pump, the sealing surface of the outer sealing gasket blocks the invasion of water, air, silt and other media outside the oil pump, and can also seal the oil seepage from the inside, the fixing holes on the metal base plate are used for fixing with the oil pump, and the upper and lower shell bodies of the oil pump are conveniently installed.

[0016] Additional aspects and advantages of the utility model will be partially given in the following description, some will become apparent from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the high-pressure oil pump sealing gasket of the utility model embodiment;

[0018] Figure 2 It is a top view of the high-pressure oil pump sealing gasket of the utility model embodiment;

[0019] Figure 3 It is Figure 2 A-A direction cross-sectional view.

[0020] In the figure:

[0021] 1, metal ring; 11, metal base plate; 111, bolt hole I; 2, inner sealing gasket; 21, inner guide bevel; 22, inner sealing gasket bonding site; 3, outer sealing gasket; 31, outer guide bevel; 32, outer sealing gasket bonding site; 4, sealing surface; 5, sealing glue groove. DETAILED DESCRIPTION

[0022] The embodiments of the utility model will be described in detail below, and the examples of the embodiments are represented in the drawings, wherein the same or similar symbols represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0023] As Figures 1-3 Indicated, a high-pressure oil pump sealing gasket proposed in the embodiment includes:

[0024] A metal ring 1 is surrounded by a metal base plate 11, and a plurality of fixing holes are arranged on the circumference of the metal ring 1 for fixing the oil pump.

[0025] A sealing body is composed of an inner sealing gasket 2 and an outer sealing gasket 3, the inner sealing gasket 2 is fixed on the inner side of the metal ring 1, and the outer sealing gasket 3 is fixed on the outer side of the metal ring 1.

[0026] Specifically, the fixing holes are bolt holes Ⅰ 111, which are corresponding to bolt holes Ⅱ on the oil pump shell, to ensure the correct installation position and facilitate the installation of the upper and lower shells of the oil pump.

[0027] In this way, by fixing the inner sealing gasket 2 and the outer sealing gasket 3 on the inner side and the outer side of the metal ring 1 respectively, and with the support of the metal base plate 11, the sealing surface 4 of the inner sealing gasket 2 can withstand the high-pressure oil in the oil pump without moving, and can well seal the high-pressure oil inside; the sealing surface 4 of the outer sealing gasket 3 can block the invasion of external media such as water, air and sand, protect the internal structure from the influence of external substances, and also can seal the oil seepage from the inside, the fixing holes on the metal base plate 11 are used for fixing the oil pump, facilitating the installation of the upper and lower shells of the oil pump, the sealing body and the metal base plate 11 form an integral whole, and the assembly of the inner sealing gasket 2 and the outer sealing gasket 3 is also very convenient, and the corresponding oil pump shell does not need to be processed with a conventional sealing groove, and can realize automatic assembly. In this way, the combination of the sealing body and the metal base plate 11 reduces the cost, has a simple structure and good sealing performance; and reduces the requirements for the sealing material and the surface state of the sealing surface and the bolt pre-tightening force, and the deformation amount of the metal base plate 11 under the bolt compression force is very small.

[0028] Further, the inner sealing gasket 2 and the outer sealing gasket 3 are vulcanized on the inner side and the outer side of the metal ring 1 respectively by an adhesive.

[0029] Specifically, the sealing body is made of acrylate rubber and rubber processing aids, the acrylate rubber has good high and low temperature resistance and oil resistance on the one hand; and has the performance of low compression permanent deformation, which can effectively meet the sealing problem of the sealing gasket, the rubber processing aid effectively improves the sealing performance, durability and mechanical properties of the sealing body, and prolongs the service life. In the actual production process, the acrylate rubber and the rubber processing aid are mixed and uniformly prepared by a rubber internal mixer, and then a rubber preformed part is extruded by a forming machine; and then the preformed part and the pretreated metal base plate 11 are injected and vulcanized in a vulcanization mold to be made.

[0030] Further, the connection parts of the inner sealing gasket 2 and the metal base plate 11, and the connection parts of the outer sealing gasket 3 and the metal base plate 11 are all provided with a glue sealing groove 5. It is ensured that the rubber on the inner side or the outer side does not overflow onto the metal base plate 11 during vulcanization, avoiding the overflow of glue affecting the compression rate of the inner sealing gasket 2 or the outer sealing gasket 3 and the appearance of the product.

[0031] In this embodiment, the inner sealing gasket 2 is provided with an inwardly inclined inner guide bevel 21, and the outer sealing gasket 4 is provided with an outwardly inclined outer guide bevel 31. The connection parts of the inner guide bevel 21 and the outer guide bevel 31 with the metal base plate 11 are all transitioned by circular arcs, and the connection parts of the inner guide bevel 21 and the outer guide bevel 31 with the sealing surface 4 are also transitioned by circular arcs. The use of corresponding circular arc transitions can avoid local stress concentration of the sealing gasket and prevent the sealing gasket from being damaged when it is pressed.

[0032] The height of the inner sealing gasket bonding part 22 is consistent with the thickness of the metal base plate 11, and the inner sealing gasket bonding part 22 is vulcanized and bonded to the inner side of the metal base plate 11 by means of high-strength adhesive, and will not fall off from the metal base plate 11 during use. The inner guide bevel 21 guides the inner sealing gasket 2 to deform inwardly when the inner sealing gasket 2 is sealed under pressure, thereby preventing the inner sealing gasket 2 from being pressed to one side of the metal base plate 11 and causing damage. The inner guide bevel 21 is inwardly inclined, and under the action of high-pressure oil on the inner side, the greater the pressure on the inner side, the tighter the inner sealing gasket 2 is pressed, thereby improving the sealing effect. The sealing surface 4 of the inner sealing gasket 2 is deformed under pressure after installation of the two parallel sealing surfaces, and applies a reverse sealing reaction force to the two installation surfaces, thereby sealing the high-pressure oil on the inner side.

[0033] The height of the outer sealing gasket bonding part 32 is consistent with the thickness of the metal base plate 11, and the outer sealing gasket bonding part 32 is vulcanized and bonded to the outer side of the metal base plate 11 by means of high-strength adhesive, and will not fall off from the metal base plate 11 during use. The outer guide bevel 32 guides the outer sealing gasket 3 to deform outwardly when the outer sealing gasket 3 is sealed under pressure, thereby preventing the outer sealing gasket 3 from being pressed to one side of the metal base plate 11 and causing damage. The outer guide bevel 31 is outwardly inclined, and if there is pressure on the outer side, the outer sealing gasket 3 will be pressed tighter, thereby improving the sealing effect. The sealing surface 4 of the outer sealing gasket 3 is deformed under pressure after installation of the two parallel sealing surfaces, and applies a reverse sealing reaction force to the two installation surfaces, thereby sealing the sand, water, air and other media on the outer side.

[0034] The thickness direction of the metal base plate 11 can limit the compression amount of the inner sealing gasket 2 and the outer sealing gasket 3, ensuring good sealing while avoiding damage caused by excessive compression of the sealing body.

[0035] It should be noted that the metal base plate 11 in this embodiment is made of high-strength aluminum alloy sheet and is formed by stamping, and then undergoes pretreatment processes such as sandblasting, cleaning and adhesive coating, so as to be vulcanized and bonded with rubber later.

[0036] It should be understood that the orientation or positional relationship indicated by terms such as "central", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely intended to facilitate the description of the present application and simplify the description, and is not intended to 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.

[0037] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0038] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, 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 or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the present application, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0040] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application. It should be covered within the protection scope of the present application.

Claims

1. A high pressure oil pump gasket, characterized by, The application relates to a sealing body for an oil pump. The sealing body comprises an inner sealing gasket and an outer sealing gasket, the inner sealing gasket is fixed on the inner side of the metal ring, and the outer sealing gasket is fixed on the outer side of the metal ring. The inner sealing gasket and the outer sealing gasket are vulcanized on the inner side and the outer side of the metal ring respectively by an adhesive.

2. The high pressure oil pump gasket of claim 1, wherein, The upper and lower end faces of the free ends of the inner sealing gasket and the outer sealing gasket are provided with symmetrical convex sealing surfaces along the thickness direction of the metal bottom plate.

3. The high pressure oil pump gasket of claim 1, wherein, The connecting parts of the inner sealing gasket and the metal bottom plate and the connecting parts of the outer sealing gasket and the metal bottom plate are provided with glue sealing grooves.

4. The high pressure oil pump gasket of claim 2, wherein, The inner sealing gasket is provided with an inner guide bevel angle which is inclined inward, and the outer sealing gasket is provided with an outer guide bevel angle which is inclined outward.

5. The high pressure oil pump gasket of claim 4, wherein, The sealing body is made of acrylate rubber and rubber processing aids.

6. The high pressure oil pump gasket of claim 1, wherein, The fixing holes are bolt holes I, and the bolt holes I correspond to bolt holes II on the oil pump shell.

7. The high pressure oil pump gasket of claim 1, wherein, ​

Images