Plunger pump oil seal assembly with pressing plate

Abstract

The utility model discloses an oil seal seat with a pressing plate for a plunger pump, which comprises an oil seal seat and an oil seal, a shaft hole is arranged at the center of the oil seal seat, a first annular groove is arranged on the inner side face of the shaft hole, the first annular groove comprises an upper groove wall, a groove bottom wall and a lower groove wall which are connected in sequence, and the upper groove wall, the groove bottom wall and the lower groove wall are connected in sequence. A first annular groove is formed in the outer side wall of the oil seal seat, a second annular groove is formed in the outer side wall of the oil seal seat, the oil seal is arranged in the first annular groove, the oil seal seat is composed of the seat ring body and the pressing plate, the first annular groove is formed by the annular groove in the lower portion of the seat ring body and the lower pressing plate, and the oil seal is arranged in the first annular groove so that the two-way limiting function can be achieved for the oil seal. According to the oil seal structure, the oil seal is prevented from shifting under the condition that the oil seal structure is applied to double pumps or multiple connected pumps, in addition, the oil seal structure is fewer in processing procedures and simpler in processing, and the manufacturing cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to an oil seal assembly for a plunger pump with a pressing plate. Background Art

[0002] An oil seal is the common name for a general seal, which simply means the seal of lubricating oil. It is a mechanical component used to seal grease (oil is the most common liquid substance in the transmission system, and generally refers to any liquid substance). It separates the parts that need lubrication in the transmission parts from the output parts, so as to prevent the leakage of lubricating oil. Seals used for static seals and dynamic seals (generally reciprocating motion) are called oil seals.

[0003] Generally, the oil seal seat oil on the market can only block the oil seal unidirectionally and is suitable for the operating conditions of a single plunger pump. When encountering the scenario of a combined plunger pump (i.e., two or more pumps connected), since the tail pressure of the front pump is often inconsistent with the housing pressure of the rear pump, it will push the oil seal to move axially and rub repeatedly, which will greatly consume the service life of the oil seal and thus generate a risk of oil leakage. Content of the Utility Model

[0004] The purpose of the utility model is to solve the above-mentioned deficiencies of the prior art and provide an oil seal assembly for a plunger pump with a pressing plate.

[0005] An oil seal assembly for a plunger pump with a pressing plate includes an oil seal seat and an oil seal. A shaft hole is provided at the center of the oil seal seat, and a first annular groove is provided on the inner side surface of the shaft hole. The first annular groove includes an upper groove wall, a groove bottom wall, and a lower groove wall that are connected in sequence. A second annular groove is provided on the outer side wall of the oil seal seat, and the oil seal is placed in the first annular groove.

[0006] Preferably, the oil seal seat is of a split structure and includes a seat ring body and a lower pressing plate. A ring groove penetrating the inner side surface of the seat ring body is provided on the lower end surface of the seat ring body. The lower pressing plate is of an annular structure, and its upper end surface is connected to the lower end surface of the seat ring body. The first annular groove is composed of the ring groove of the seat ring body and the lower pressing plate.

[0007] Preferably, a chamfer is provided at the connection between the upper end surface and the outer arc surface of the seat ring body.

[0008] Preferably, a hardened layer is provided on the outer peripheral wall of the seat ring body, and the depth of the hardened layer is 1 - 2.5 mm.

[0009] Beneficial Effects: Compared with the prior art, the utility model forms an oil seal seat through the combination of the seat ring body and the pressing plate. The first annular groove is formed by the ring groove below the seat ring body and the lower pressing plate. Placing the oil seal in the first annular groove can achieve the function of bidirectional limiting of the oil seal, preventing the oil seal from shifting in the case of a double pump or a multi-connected pump. In addition, this structure has fewer processing procedures and is simpler to process, effectively reducing the manufacturing cost. Description of the Drawings

[0010] Figure 1 It is a schematic diagram of a oil seal assembly for a plunger pump with a pressing plate;

[0011] In the figure, 1 is the seat ring body, 2 is the lower pressing plate, 3 is the oil seal, 4 is the shaft hole, 5 is the first annular groove, and 6 is the second annular groove. Detailed Description of the Preferred Embodiment

[0012] To deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0013] As Figure 1 shown, the seat ring body 1, the lower pressing plate 2, the oil seal 3, the shaft hole 4, the first annular groove 5, and the second annular groove 6;

[0014] An oil seal assembly for a plunger pump with a pressing plate includes an oil seal seat and an oil seal 3. An oil seal seat is provided with a shaft hole 4 at the center. The inner side surface of the shaft hole 4 is provided with a first annular groove 5. The first annular groove 5 includes an upper groove wall, a groove bottom wall, and a lower groove wall that are connected in sequence. The outer side wall of the oil seal seat is provided with a second annular groove 6, and the oil seal 3 is placed in the first annular groove 5.

[0015] In this embodiment, the oil seal seat is a split structure. The oil seal seat includes a seat ring body 1 and a lower pressing plate 2. The lower end surface of the seat ring body 1 is provided with a ring groove that penetrates the inner side surface of the seat ring body 1. The lower pressing plate 2 is a ring-shaped structure, and its upper end surface is connected to the lower end surface of the seat ring body 1. The first annular groove 5 is formed by the ring groove of the seat ring body 1 and the lower pressing plate 2.

[0016] In this embodiment, a chamfer is provided at the connection between the upper end surface of the seat ring body 1 and the outer arc surface.

[0017] In this embodiment, a hardened layer is provided on the outer peripheral wall of the seat ring body 1, and the depth of the hardened layer is 1 - 2.5 mm.

[0018] Instructions for use: A limit is set at one end of the seat ring body 1, and a lower pressing plate 2 is added at the other end, so that the oil seal 3 has the function of two-way limit and greatly increases the service life of the oil seal 3; in addition, the present invention has fewer processes and is simpler to process during manufacturing, effectively reducing the manufacturing cost.

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil seal assembly for a plunger pump with a pressure plate, characterized in that: It comprises an oil seal seat and an oil seal, wherein the oil seal seat has an axial hole at its center, the inner side of the axial hole has a first annular groove, the first annular groove comprises an upper groove wall, a groove bottom wall and a lower groove wall connected in sequence, the outer side wall of the oil seal seat has a second annular groove, and the oil seal is placed in the first annular groove; The oil seal seat is a split structure, and the oil seal seat includes a seat ring body and a lower pressure plate. The lower end face of the seat ring body is provided with an annular groove that penetrates the inner side of the seat ring body. The lower pressure plate is an annular structure, and its upper end face is connected to the lower end face of the seat ring body. The first annular groove is composed of the annular groove of the seat ring body and the lower pressure plate.

2. The oil seal assembly for a plunger pump with a pressure plate according to claim 1, characterized in that: A chamfer is provided at the connection between the upper end surface of the seat ring body and the outer arc surface.

3. The oil seal assembly for a plunger pump with a pressure plate according to claim 2, characterized in that: A hardened layer is provided on the outer peripheral wall of the seat ring body, and the depth of the hardened layer is 1-2.5 mm.

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