Oil seal structure

Abstract

The utility model discloses an oil seal structure and relates to the field of sealing elements, the oil seal structure comprises an oil baffle disc and an edge cover fixed at one end of the oil baffle disc, a flange is arranged on one side of the edge cover, a gap is reserved between the edge cover and the flange, and a rubber sealing element used for sealing is movably arranged on the side, located on the flange, of the edge cover. A metal inserting plate used for tensioning, a rubber ring and a spring ring are sequentially arranged between the rubber sealing piece and the side cover. The rubber ring can extrude the metal inserting plate to push the rubber sealing piece to be tightly attached to the surface of the flange, then the sealing effect is achieved, lubricating oil can be effectively prevented from entering the space between the oil baffle disc and the side face of the flange, and then the risk of oil leakage of the device is reduced.

Description

Technical Field

[0001] The present application relates to the field of sealing elements, and in particular to an oil seal structure. Background Art

[0002] The boric acid recirculation pump is a recirculation pump commonly used in nuclear power plants. The function of the boric acid recirculation pump is to prevent the boric acid in the boric acid injection tank from crystallizing during the operation of the nuclear power plant. The boric acid recirculation pump continuously circulates the boric acid solution in the boric acid injection tank to ensure constant concentration and temperature of the boric acid solution. Another function of this pump is to complete the initial filling of the boric acid injection tank. The boric acid recirculation pump needs to use an oil seal to seal the pump body to prevent oil leakage.

[0003] For example, the bearing body mounting structure for a boric acid recirculation pump disclosed in patent number CN202597175U has the following deficiencies when used:

[0004] The above patent sets a gap between the side cover and the flange of the oil baffle plate to create an oil collection chamber. However, when used, it is found that the oil will flow through the gap to other positions of the pump body, which may cause the risk of oil leakage. Therefore, it is necessary to design an oil seal structure to seal it. Utility Model Content

[0005] In order to improve the sealing performance of the pump body structure, the present application provides an oil seal structure.

[0006] The oil seal structure provided in this application adopts the following technical solution:

[0007] An oil seal structure includes an oil baffle plate and a side cover fixed to one end of the oil baffle plate, a flange is provided on one side of the side cover and a gap is left between the side cover and the flange, a rubber seal for sealing is movably provided on the side cover at one side of the flange, and a metal plug plate, a rubber ring and a spring ring for tensioning are sequentially provided between the rubber seal and the side cover.

[0008] By adopting the above technical solution, the spring ring applies pressure to the metal plug plate and the rubber ring, thereby making the rubber seal fit more tightly to the flange surface, thereby improving the barrier and sealing effects and preventing oil leakage.

[0009] Preferably, the side cover is provided with a slide groove on one side of the flange, and the metal insert plate, rubber ring and spring ring are all located in the slide groove.

[0010] By adopting the above technical solution, the slide groove limits the metal plug plate, allowing the metal plug plate to move longitudinally in the slide groove, thereby preventing the metal plug plate from being offset due to force, causing the angle of the rubber seal to change when contacting the flange, affecting the sealing effect.

[0011] Preferably, one side of the spring ring abuts against the rubber ring, and the other end abuts against the bottom of the inner cavity of the slide groove, and the rubber ring is flexible rubber.

[0012] By adopting the above technical solution, the rubber ring can fix the spring ring more stably.

[0013] Preferably, the rubber ring is fixed to one side of the metal insert plate away from the spring ring, and the metal insert plates are provided in a plurality.

[0014] By adopting the above technical solution, the metal plug plate can make the rubber seal more evenly stressed.

[0015] Preferably, a socket is formed at one end of the metal plug plate, and an inner plug strip which can be detachably plugged into the socket is fixed to the end of the metal plug plate opposite to the socket.

[0016] By adopting the above technical solution, the inserting strip is inserted into the socket to splice several metal inserting plates to form a ring.

[0017] Preferably, a plurality of the metal plug plates are connected end to end to form a circle.

[0018] By adopting the above technical solution, the circular arrangement can evenly apply force to the surface of the rubber seal and cause it to be squeezed.

[0019] Preferably, the rubber seal is provided with front lips for primary sealing on both sides of the flange, and the rubber seal is provided with a plurality of secondary sealing strips at equal intervals adjacent to the front lips.

[0020] By adopting the above technical solution, the front lip and the baffle strip can achieve primary sealing.

[0021] Preferably, a second baffle bar fixedly connected to the rubber seal is provided in the gap between every two of the first baffle bars, and the end surfaces of the two ends of the second baffle bar are lower than the end surface of the first baffle bar.

[0022] By adopting the above technical solution, the second baffle can seal the flange when the front lip and the first baffle lose their sealing properties, thereby extending the sealing effect of the device.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The front lip and the baffle strip can be used to seal the gap between the oil baffle plate, the side cover and the flange for the first time, effectively blocking the lubricating oil, limiting the flow of lubricating oil, and reducing the risk of oil leakage of the equipment;

[0025] 2. When the front lip and the first baffle lose their sealing effect due to wear, the second baffle will contact the flange to achieve the sealing effect, so that the device has the sealing barrier effect again. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of a cross-sectional partial oil seal structure of the pump body of the present application;

[0027] Figure 2 For this application Figure 1 The enlarged schematic diagram at A in the middle;

[0028] Figure 3 This is a schematic diagram of the connection between the rubber ring and the spring ring of the present application;

[0029] Figure 4 This is a schematic cross-sectional view of the rubber seal of the present application.

[0030] Reference numerals: 1, oil baffle plate; 2, flange; 3, slide groove; 4, rubber ring; 5, spring ring; 6, metal insert plate;

[0031] 7. Rubber seal; 71. Front lip; 72. Baffle bar 1; 73. Baffle bar 2;

[0032] 8. Socket; 9. Insert; 10. Side cover. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-4 This application is described in further detail.

[0034] The embodiment of the present application discloses an oil seal structure.

[0035] Example 1

[0036] Reference Figure 1-3, an oil seal structure, including an oil baffle plate 1 and a side cover 10 integrally formed and fixed at one end of the oil baffle plate 1, a flange 2 is arranged on one side of the side cover 10 and a gap is left between the side cover 10 and the flange 2, the side cover 10, the flange 2 and the oil baffle plate 1 connection structure are all structures in patent number CN202597175U, and this case is improved locally. Other structures of this device adopt the above patent structure, so it will not be described in detail, the side cover 10 is located on one side of the flange 2 and is provided with a slide groove 3, the slide groove 3 is set in an annular shape, and a rubber seal 7 for sealing is movably arranged in the upper half of the slide groove 3, and the lower half of the rubber seal 7 is located in the slide groove 3, and the rubber seal A metal plug plate 6, a rubber ring 4 and a spring ring 5 for tensioning are arranged in sequence from top to bottom between the part 7 and the bottom of the inner cavity of the slide groove 3 of the side cover 10. The rubber ring 4 is provided with an arc groove on one side of the spring ring 5. The surface of one side of the spring ring 5 abuts against the inner wall of the arc groove of the rubber ring 4. The arc groove wraps half of the width of the spring ring 5, thereby making the connection between the rubber ring 4 and the spring ring 5 more stable and avoiding separation of the two. The other end surface of the spring ring 5 abuts against the bottom of the inner cavity of the slide groove 3. The rubber ring 4 is preferably flexible rubber. The side of the rubber ring 4 away from the spring ring 5 is set as a curved surface, and the curved surface of the rubber ring 4 is fixed to one side of the metal plug plate 6 by glue. The rubber seal 7 is set to be ring-shaped.

[0037] Through the above arrangement, when the device is operating normally, the lubricating oil will be thrown onto the surface of the oil baffle plate 1. Since the gap between the side cover 10 of the oil baffle plate 1 and the flange 2 is filled by the rubber seal 7, a sealing effect is achieved. The spring ring 5 is always in an open state. Therefore, the rubber ring 4 will be squeezed under the reaction force of the spring ring 5, causing the rubber ring 4 to deform. The rubber ring 4 will squeeze the metal insert plate 6 to push the rubber seal 7 to fit tightly against the surface of the flange 2, thereby achieving a sealing effect. The lubricating oil can be effectively prevented from entering the space between the oil baffle plate 1 and the side of the flange 2, thereby reducing the risk of oil leakage from the device.

[0038] Reference Figure 2 , 3 A plurality of metal plug plates 6 are provided and are all arranged in an arc shape. A curved socket 8 is provided on a narrow surface at one end of the metal plug plate 6. An insert strip 9 is fixed to the opposite end of the metal plug plate 6 to the socket 8. The insert strip 9 can be removably plugged into the socket 8 and a gap is left between the front end surface of the insert strip 9 and the bottom of the inner cavity of the socket 8 for further insertion of the insert strip 9. A plurality of metal plug plates 6 are connected end to end to form a circle.

[0039] Through the above arrangement, multiple metal plug plates 6 are connected end to end and surround the oil baffle plate 1. When the multiple metal plug plates 6 are subjected to a force toward the axis, the insert strip 9 of the metal plug plate 6 will be inserted into the socket 8 of another metal plug plate 6, thereby changing the diameter of the circle formed by the multiple metal plug plates 6, thereby effectively squeezing the rubber seal 7.

[0040] Reference Figure 4 The rubber seal 7 is located on both sides of the flange 2 and is integrally formed with a front lip 71 for preliminary sealing. The two front lips 71 are inclined so that one side of them abuts against the surface of the flange 2, and the contact area is small, so the sealing effect is good. The rubber seal 7 is adjacent to the front lip 71 and is integrally formed with a plurality of secondary sealing baffles 72 at equal intervals. The plurality of baffles 72 are inclinedly arranged in the same manner as the front lip 71, and one edge line of the baffle 72 abuts against the surface of the flange 2 and realizes secondary sealing. The gap between every two baffles 72 is provided with a baffle 2 73 integrally formed with the rubber seal 7. The baffle 2 73 is arranged in a "human" shape, and the two end faces of the baffle 2 73 are 2 to 3 mm lower than the end faces of the baffle 1 72, and do not abut against the surface of the flange 2 under normal conditions.

[0041] Through the above-mentioned arrangement, under the pressure of the spring coil 5, the front lip 71 and the baffle bar 1 72 abut against the surface of the flange 2, thereby achieving a barrier sealing effect. When the end faces of the front lip 71 and the baffle bar 1 72 are worn, there will be loss. Under the pressure of the spring coil 5, the side edge of the end face of the baffle bar 2 73 abuts against the surface of the flange 2 to further achieve sealing, so that the device will not lose its sealing function, thereby ensuring the effect of the oil seal and making the device have a longer-lasting oil sealing effect.

[0042] The implementation principle of an oil seal structure in an embodiment of the present application is as follows: the gap between the flange 2 and the side cover 10 can be sealed by the provided rubber seal 7, thereby preventing the lubricating oil splashed onto the oil baffle plate 1 from entering between the oil baffle plate 1 and the flange 2, thereby reducing the assembly gap generated by the structural assembly of the device, thereby improving the oil leakage prevention effect of the device.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An oil seal structure, comprising an oil baffle plate (1) and a side cover (10) fixed to one end of the oil baffle plate (1), wherein a flange (2) is provided on one side of the side cover (10) and a gap is left between the side cover (10) and the flange (2), characterized in that: The side cover (10) is movably provided with a rubber seal (7) for sealing on one side of the flange (2), and a metal plug plate (6), a rubber ring (4) and a spring ring (5) for tensioning are sequentially provided between the rubber seal (7) and the side cover (10).

2. An oil seal structure according to claim 1, characterized in that: The side cover (10) is provided with a slide groove (3) on one side of the flange (2), and the metal plug plate (6), the rubber ring (4) and the spring ring (5) are all located in the slide groove (3).

3. An oil seal structure according to claim 2, characterized in that: One side of the spring ring (5) abuts against the rubber ring (4), and the other end abuts against the bottom of the inner cavity of the slide groove (3); the rubber ring (4) is flexible rubber.

4. An oil seal structure according to claim 3, characterized in that: The side of the rubber ring (4) away from the spring ring (5) is fixed to one side of the metal plug plate (6), and the metal plug plates (6) are provided in a plurality.

5. An oil seal structure according to claim 4, characterized in that: A socket (8) is provided at one end of the metal plug plate (6), and an inner plug strip (9) which can be detachably plugged into the inner part of the socket (8) is fixed to the end of the metal plug plate (6) opposite to the socket (8).

6. An oil seal structure according to claim 5, characterized in that: A plurality of the metal plug plates (6) are connected end to end to form a circle.

7. An oil seal structure according to claim 1, characterized in that: The rubber seal (7) is provided with front lips (71) for primary sealing on both sides of the flange (2), and the rubber seal (7) is provided with a plurality of secondary sealing stop bars (72) at equal intervals adjacent to the front lips (71).

8. An oil seal structure according to claim 7, characterized in that: A second baffle (73) fixedly connected to the rubber seal (7) is provided in the gap between each two of the first baffles (72), and the two end surfaces of the second baffle (73) are lower than the end surfaces of the first baffle (72).

Images