Floating type sealing assembly

Abstract

The utility model relates to the field of floating type sealing assemblies, and particularly discloses a floating type sealing assembly which comprises a sealing body, the sealing body comprises a mounting cavity, a first opening and a second opening, the first opening and the second opening are respectively provided with a first sealing piece, and a second sealing piece is arranged in the mounting cavity. The outer wall of the second sealing piece abuts against the inner wall of the mounting cavity, the second sealing piece is in sliding fit with the inner wall of the mounting cavity, the second sealing piece is provided with a hollow cavity of an annular structure, the axis of the hollow cavity coincides with the axis of the second sealing piece, and drainage grooves are formed in the positions, located on the two sides of the second sealing piece, of the sealing body and communicate with the mounting cavity. The sealing body is connected with the working equipment through the second opening, the first sealing piece at the second opening can effectively reduce instantaneous impact of lubricating oil, the lubricating oil in the working equipment can enter and exit from the mounting cavity through the drainage groove, the instantaneous impact of the lubricating oil can be further reduced, and the stability of the working environment in the working equipment can be effectively enhanced.

Description

Technical Field

[0001] The utility model relates to the field of floating seal components, in particular to a floating seal component. Background Art

[0002] Oilfield water injection is one of the main processes for secondary oil recovery in oilfields, and is also an important measure to ensure stable and high production of oilfields. The plunger pump is a very important fluid boosting machine with the advantages of high efficiency, energy saving, and easy operation. It is a key equipment in the oilfield production process.

[0003] Existing plunger pumps usually adopt a completely sealed structure when connected to working equipment. When in use, the lubricating oil in the working equipment has a high instantaneous impact, which can easily cause damage to the equipment, causing the pump group to fail to work normally. Frequent replacement of spare parts increases operating costs, and the plunger of the plunger pump is prone to unstable jumping during operation, which can easily cause damage to the seal and affect the stability of the sealing performance. Utility Model Content

[0004] The utility model provides a floating seal assembly to solve the technical problems in the prior art that the lubricating oil in the working equipment has a high instantaneous impact, which is easy to damage the equipment, and the plunger of the plunger pump is prone to unstable jumping during the working process, which causes damage to the seal and affects the stability of the sealing performance.

[0005] To solve the above problems, the utility model provides a floating seal assembly adopts the following technical solution: it includes a sealing body, the sealing body includes an installation cavity, a first opening, and a second opening, a first seal is provided at the first opening and the second opening, a second seal is provided in the installation cavity, the outer wall of the second seal and the inner wall of the installation cavity abut against each other and the second seal and the inner wall of the installation cavity slide together, the second seal is provided with a hollow cavity with an annular structure, the axis of the hollow cavity and the second seal coincide with each other, and drainage grooves are provided on both sides of the second seal on the sealing body, and the drainage grooves are connected with the installation cavity.

[0006] Furthermore, a slip-aiding layer is provided on the side where the inner wall of the installation cavity contacts with the second sealing member, and the second sealing member is slidably matched with the slip-aiding layer.

[0007] Furthermore, the first seal and the second seal are both configured as an annular structure, and the axes of the first seal, the second seal and the sealing body coincide with each other.

[0008] Further, the inner diameter of the second sealing component is smaller than the inner diameter of the first sealing component, and the outer diameter of the second sealing component is larger than the outer diameter of the first sealing component.

[0009] Furthermore, the first sealing member is provided with a mounting groove, and the first sealing member is engaged and connected with the sealing body through the mounting groove.

[0010] Furthermore, the sealing body is provided with a pressure plate at the first opening and the second opening. The pressure plate is provided as an annular structure. The pressure plate is fixedly connected to the sealing body, and the pressure plate abuts against and fits against the first sealing member.

[0011] Furthermore, a connecting pin is provided on the pressing plate, and the connecting pin passes through the pressing plate and is fixedly connected to the sealing body.

[0012] The floating seal assembly provided by the utility model has the following beneficial effects: the first seal at the first opening is used to block dust from the external environment, the seal body is connected to the working equipment through the second opening, the first seal at the second opening can effectively reduce the instantaneous impact of the lubricating oil, the second seal reciprocates synchronously with the plunger of the plunger pump, the setting of the hollow cavity can effectively increase the elastic force of the second seal in the vertical direction, can ensure the pressure balance of the plunger pump when it is working, can maintain the stability of the sealing performance according to the elastic change when the plunger pump has unstable jumps, the setting of the leakage groove ensures the flow of the medium in the installation cavity, and then ensures the reciprocating motion of the second seal along the installation cavity, and is connected to the working equipment toward the leakage groove at the second opening, the lubricating oil in the working equipment can enter and exit the installation cavity through the leakage groove under the action of the reciprocating motion of the second seal, can further reduce the instantaneous impact of the lubricating oil, and can effectively enhance the stability of the working environment in the working equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0014] Figure 1 The utility model is a structural schematic diagram of a floating seal assembly.

[0015] Description of reference numerals:

[0016] 1. sealing body; 11. mounting cavity; 111. sliding layer; 12. first opening; 13. second opening; 14. drain groove;

[0017] 2. first sealing member; 21. mounting groove;

[0018] 3. second sealing member; 31. hollow cavity;

[0019] 4. Pressing plate; 41. Connecting pin. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0021] Any number of elements in the drawings is for illustration and not limitation, and any naming is for distinction only and does not have any limiting meaning.

[0022] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0023] The utility model provides a floating seal assembly, such as Figure 1 As shown, it includes a sealing body 1, which includes an installation cavity 11, a first opening 12, and a second opening 13. A first sealing member 2 is provided at the first opening 12 and the second opening 13. A second sealing member 3 is provided in the installation cavity 11. The outer wall of the second sealing member 3 and the inner wall of the installation cavity 11 abut against each other, and the second sealing member 3 and the inner wall of the installation cavity 11 slide in cooperation. The second sealing member 3 is provided with a hollow cavity 31 of an annular structure, and the axis of the hollow cavity 31 and the second sealing member 3 coincide with each other. The sealing body 1 is provided with leakage grooves 14 on both sides of the second sealing member 3, and the leakage grooves 14 are communicated with the installation cavity 11.

[0024] By adopting the above technical scheme, the first seal 2 at the first opening 12 is used to block dust from the external environment, and the sealing body 1 is connected to the working equipment through the second opening 13. The first seal 2 at the second opening 13 can effectively reduce the instantaneous impact of the lubricating oil. The second seal 3 reciprocates synchronously with the plunger of the plunger pump. The setting of the hollow cavity 31 can effectively increase the elastic force of the second seal 3 in the vertical direction, which can ensure the pressure balance of the plunger pump during operation, and can maintain the stability of the sealing performance according to the elastic change when the plunger pump has unstable jumps. The setting of the leakage groove 14 ensures the flow of the medium in the installation cavity 11, and then ensures that the second seal 3 reciprocates along the installation cavity 11, and is connected to the working equipment toward the leakage groove 14 at the second opening 13. The lubricating oil in the working equipment can enter and exit the installation cavity 11 through the leakage groove 14 under the action of the reciprocating motion of the second seal 3, which can further reduce the instantaneous impact of the lubricating oil and effectively enhance the stability of the working environment in the working equipment.

[0025] In this embodiment, the leakage groove located on the sealing body 1 facing the first opening 12 allows air to flow, and the leakage groove located on the sealing body 1 facing the second opening 13 allows lubricating oil to flow.

[0026] In this embodiment, a slip layer 111 is provided on the side where the inner wall of the installation cavity 11 is in contact with the second sealing member 3, and the second sealing member 3 and the slip layer 111 are slidably matched to ensure the sealing of the contact surface between the second sealing member 3 and the inner wall of the installation cavity 11, and to ensure the smoothness of the sliding of the second sealing member 3 along the inner wall of the installation cavity 11.

[0027] In this embodiment, the first sealing member 2 and the second sealing member 3 are both configured as annular structures, and the axes of the first sealing member 2, the second sealing member 3 and the sealing body 1 coincide with each other.

[0028] It should be noted that the first seal 2 and the second seal 3 are both made of elastic material. In the present embodiment, the inner diameter of the second seal 3 is smaller than the inner diameter of the first seal 2, so that the second seal 3 is more firmly fixed to the outer wall of the plunger of the plunger pump, ensuring that the second seal 3 reciprocates synchronously with the plunger. The outer diameter of the second seal 3 is larger than the outer diameter of the first seal 2, limiting the reciprocating stroke of the second seal 3.

[0029] In this embodiment, the first seal 2 is provided with a mounting groove 21 , and the first seal 2 is engaged with the sealing body 1 through the mounting groove 21 , which facilitates the installation of the first seal 2 and can effectively increase the stability of the installation of the first seal 2 on the sealing body 1 .

[0030] In this embodiment, the sealing body 1 is provided with a pressure plate 4 at the first opening 12 and the second opening 13. The pressure plate 4 is arranged in an annular structure. The pressure plate 4 is fixedly connected to the sealing body 1, and the pressure plate 4 is pressed against the first sealing member 2. The pressure plate 4 presses the first sealing member 2, which can further increase the stability and fixity of the first sealing member 2 on the sealing body 1.

[0031] In this embodiment, a connecting pin 41 is provided on the pressing plate 4 , and the connecting pin 41 penetrates the pressing plate 4 and is fixedly connected to the sealing body 1 , so as to realize the installation and fixation of the pressing plate 4 on the sealing body 1 .

[0032] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and other terms indicating orientation or position relationship are based on the orientation or position relationship shown in the drawings of this specification, which are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0033] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A floating seal assembly, characterized in that: The invention comprises a sealing body, which comprises an installation cavity, a first opening and a second opening. A first sealing member is arranged at the first opening and the second opening. A second sealing member is arranged in the installation cavity. The outer wall of the second sealing member abuts against the inner wall of the installation cavity and the second sealing member slides with the inner wall of the installation cavity. The second sealing member is provided with a hollow cavity of an annular structure. The axis of the hollow cavity and the second sealing member coincide with each other. The sealing body is provided with drainage grooves on both sides of the second sealing member, and the drainage grooves are connected with the installation cavity.

2. A floating seal assembly according to claim 1, characterized in that: A lubrication layer is arranged on the side where the inner wall of the installation cavity contacts with the second sealing member, and the second sealing member is slidably matched with the lubrication layer.

3. A floating seal assembly according to claim 1, characterized in that: The first seal and the second seal are both arranged as annular structures, and the axes of the first seal, the second seal and the sealing body coincide with each other.

4. A floating seal assembly according to claim 3, characterized in that: The inner diameter of the second sealing member is smaller than the inner diameter of the first sealing member, and the outer diameter of the second sealing member is larger than the outer diameter of the first sealing member.

5. A floating seal assembly according to claim 1, characterized in that: The first sealing member is provided with a mounting groove, and the first sealing member is engaged and connected with the sealing body through the mounting groove.

6. A floating seal assembly according to claim 1, characterized in that: The sealing body is provided with a pressure plate at the first opening and the second opening. The pressure plate is provided with an annular structure. The pressure plate is fixedly connected to the sealing body, and the pressure plate is pressed against and fits with the first sealing member.

7. A floating seal assembly according to claim 6, characterized in that: The pressing plate is provided with a connecting pin, which penetrates through the pressing plate and is fixedly connected with the sealing body.

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