Mechanical sealing device with improved structure

Abstract

The utility model relates to the field of mechanical sealing, in particular to a mechanical sealing device with an improved structure, which comprises a moving ring and a static ring, the surfaces of the moving ring and the static ring are abutted and matched for use, a spring is fixedly connected onto the moving ring, the other end of the spring is abutted and provided with a fixed seat, a lubricating mechanism is arranged on the moving ring, and the fixed seat is provided with a sealing ring. The lubricating mechanism comprises an oil cavity, the oil cavity is formed in the movable ring, lubricating oil is stored in the oil cavity, a plurality of oil outlet holes distributed at equal intervals in the circumferential direction of the movable ring are formed in the outer wall face, close to the static ring, of the movable ring, and a wiping mechanism capable of absorbing redundant lubricating oil is fixedly arranged on the static ring. The wiping mechanism comprises a sponge which is arranged at the intersection of the movable ring and the static ring and can absorb redundant lubricating oil, the redundant lubricating oil is absorbed through oil absorption materials such as the sponge, cleanliness and dryness of a sealing interface are kept, and the problem that excessive lubricating oil overflows along the contact face of the movable ring and the static ring to affect the sealing performance is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a mechanical seal device with an improved structure. Background Art

[0002] A mechanical seal is a device that prevents fluid leakage by maintaining the stationary ring and the rotating ring in contact and relative sliding under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal.

[0003] Chinese patent CN216975772U discloses a mechanical seal device that is easy to lubricate. Through the coordinated use of a dynamic ring, a sealing cover, an oil inlet pipe, and an oil outlet hole, before use, the mechanical seal device is disassembled, the sealing cover is opened, and lubricating oil is added from the oil inlet pipe to the oil storage tank. During the rotation process, the lubricating oil can automatically seep out from the oil outlet hole to continue to maintain the sealing and lubrication process between the dynamic and static rings, solving the problem that the traditional mechanical seal device cannot automatically compensate for the lubricating liquid.

[0004] However, in the application, during the rotation process, the lubricating oil can automatically seep out from the oil outlet hole, and the excessive lubricating oil that seeps out will overflow along the contact surface of the moving ring and the stationary ring, causing waste and inconvenience in the use of the device. At the same time, too much lubricating oil will also affect the sealing effect.

[0005] Based on this, a mechanical sealing device with an improved structure is now provided to eliminate the disadvantages of the existing device. Utility Model Content

[0006] In view of the above problems, a mechanical sealing device with an improved structure is provided. By setting a wiping mechanism, excess lubricating oil is absorbed by oil-absorbing materials such as sponges to keep the sealing interface clean and dry, thereby solving the problem in the background technology that excessive lubricating oil will overflow along the contact surface of the dynamic ring and the static ring.

[0007] In order to solve the existing technical problems, the utility model provides the following technical solutions:

[0008] A mechanical sealing device with an improved structure comprises a dynamic ring and a static ring, the surfaces of the dynamic ring and the static ring are used in abutment with each other, a spring is fixedly connected to the dynamic ring, the other end of the spring is abutted with a fixed seat, a lubrication mechanism is provided on the dynamic ring, the lubrication mechanism comprises an oil cavity, the oil cavity is arranged in the dynamic ring, lubricating oil is stored in the oil cavity, a plurality of oil outlet holes equidistantly distributed along the circumferential direction of the dynamic ring are arranged on the outer wall surface of the dynamic ring close to the static ring, a wiping mechanism capable of absorbing excess lubricating oil is fixedly provided on the static ring, the wiping mechanism comprises a sponge which is arranged at the intersection of the dynamic ring and the static ring and can absorb excess lubricating oil.

[0009] Preferably, the wiping mechanism also includes a fixed ring, which is fixed on the stationary ring. The fixed ring is divided into a first annular chamber and a second annular chamber by an annular partition. The side of the first annular chamber that contacts the stationary ring is open. The sponge is fixed in the first annular chamber. The first annular chamber is provided with an extrusion piece for squeezing the sponge after absorbing the lubricating oil, and the second annular chamber is provided with a collecting piece.

[0010] Preferably, the extrusion member includes a sliding rod, which slides through the top wall of the first annular chamber, and a pressure plate is fixedly provided at one end of the sliding rod located in the inner cavity of the first annular chamber, and an operating plate is fixedly provided at the other end of the sliding rod. A return spring is sleeved on the sliding rod, and both ends of the return spring are respectively abutted against the outer wall of the first annular chamber and the outer wall of the operating plate.

[0011] Preferably, the collecting member comprises a plurality of leakage holes arranged in a matrix on an annular partition plate, and an oil outlet pipe is fixedly provided on the bottom surface of the second annular chamber.

[0012] Preferably, a sliding surface inclined toward the oil outlet pipe is provided in the second annular chamber.

[0013] Preferably, the lubrication mechanism further comprises an oil inlet, and a sealing plug is provided on the oil inlet.

[0014] Preferably, a sealing ring is arranged around the edge of one side of the dynamic ring close to the static ring.

[0015] Preferably, the stationary ring is rotatably mounted on the stationary ring mounting seat via a bearing.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model provides a wiping mechanism, when the moving ring rotates, the lubricating oil is evenly smeared on the contact surface of the moving ring and the stationary ring through the oil outlet hole, and the excess lubricating oil is absorbed by the oil-absorbing material such as sponge, so as to keep the sealing interface clean and dry; when the excess lubricating oil needs to be cleaned, the sliding rod is pushed downward by the operating panel to compress the pressing plate to squeeze out the absorbed lubricating oil, and the lubricating oil flows from the leakage hole into the second annular chamber for collection; after the device is used, the collected lubricating oil can be discharged through the oil outlet pipe for recovery, so as to achieve the effect of absorbing the excess lubricating oil and avoiding affecting the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a mechanical sealing device with an improved structure Figure 1 .

[0019] Figure 2 The present invention is a three-dimensional exploded diagram of a mechanical sealing device with an improved structure.

[0020] Figure 3 The present invention is a schematic diagram of a cross-sectional three-dimensional structure of a mechanical sealing device with an improved structure.

[0021] Figure 4 The present invention is a three-dimensional structural schematic diagram of a lubrication mechanism of a mechanical sealing device with an improved structure.

[0022] Figure 5 The present invention is a partial three-dimensional structural schematic diagram of a wiping mechanism of a mechanical sealing device with an improved structure.

[0023] Figure 6 The invention is a schematic cross-sectional three-dimensional structure diagram of a wiping mechanism of a mechanical sealing device with an improved structure.

[0024] Figure 7 It is a three-dimensional enlarged view of an extruded part of a mechanical seal device with an improved structure.

[0025] Figure 8 The present invention is a three-dimensional structural schematic diagram of a leakage hole of a mechanical sealing device with an improved structure.

[0026] Notes on figure numbers: 100, fixed seat; 101, spring; 102, dynamic ring; 103, static ring; 104, static ring mounting seat; 105, bearing; 200, wiping mechanism; 201, fixed ring; 202, sponge; 203, pressure plate; 204, operating panel; 205, slide rod; 206, return spring; 207, second annular chamber; 208, oil outlet pipe; 209, leakage hole; 300, lubrication mechanism; 301, oil inlet; 302, oil chamber; 303, oil outlet hole; 304, sealing ring. DETAILED DESCRIPTION

[0027] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] See also Figure 1-Figure 8As shown, a mechanical sealing device with an improved structure includes a dynamic ring 102 and a static ring 103, the surfaces of the dynamic ring 102 and the static ring 103 are used in abutment with each other, a spring 101 is fixedly connected to the dynamic ring 102, and the other end of the spring 101 is abutted with a fixed seat 100, a lubrication mechanism 300 is provided on the dynamic ring 102, and the lubrication mechanism 300 includes an oil cavity 302, and the oil cavity 302 is opened in the dynamic ring 102, and lubricating oil is stored in the oil cavity 302, and a plurality of oil outlet holes 303 are equidistantly distributed along the circumferential direction of the dynamic ring 102 are provided on the outer wall surface of the dynamic ring 102 close to the static ring 103, and a wiping mechanism 200 capable of absorbing excess lubricating oil is fixedly provided on the static ring 103, and the wiping mechanism 200 includes a sponge 202 which is arranged at the intersection of the dynamic ring 102 and the static ring 103 and can absorb excess lubricating oil.

[0029] The moving ring 102 and the stationary ring 103 are the main components of the mechanical sealing device. Their surfaces are tightly matched to form a sealing interface. The spring 101 provides a pre-tightening force for the moving ring 102 to ensure that the moving ring 102 and the stationary ring 103 always maintain close contact to form an effective seal. The oil chamber 302 is opened inside the moving ring 102 to store lubricating oil. When the moving ring 102 rotates, the lubricating oil is evenly applied to the contact surface of the moving ring 102 and the stationary ring 103 through the oil outlet 303, which plays a role in lubrication and reducing wear. At the same time, the lubricating oil can also play a role in cooling and cleaning, further extending the service life of the sealing device. During the lubrication process, excess lubricating oil may be generated. If the excess lubricating oil is not removed in time, it may affect the sealing performance. Therefore, by designing a wiping mechanism 200, an oil-absorbing material such as a sponge 202 is used to absorb excess lubricating oil to keep the sealing interface clean and dry.

[0030] See also Figure 3-Figure 7 As shown, the wiping mechanism 200 also includes a fixed ring 201, and the fixed ring 201 is fixed on the stationary ring 103. The fixed ring 201 is divided into a first annular chamber and a second annular chamber 207 by an annular partition. The side of the first annular chamber that contacts the stationary ring 103 is open, and the sponge 202 is fixed in the first annular chamber. The first annular chamber is provided with an extrusion piece for extruding the sponge 202 after absorbing the lubricating oil, and the second annular chamber 207 is provided with a collecting piece.

[0031] After the sponge 202 absorbs a certain amount of lubricating oil, it needs to be squeezed to release the lubricating oil. The squeezing member squeezes the sponge 202 to squeeze out the absorbed lubricating oil. In order to prevent the squeezed lubricating oil from scattering everywhere, a collecting member is designed to collect the lubricating oil for subsequent processing or recycling.

[0032] See also Figure 5-Figure 7As shown, the extrusion member includes a slide rod 205, which slides through the top wall of the first annular chamber. A pressure plate 203 is fixedly provided at one end of the slide rod 205 located in the inner cavity of the first annular chamber, and an operating plate 204 is fixedly provided at the other end of the slide rod 205. A return spring 206 is sleeved on the slide rod 205, and the two ends of the return spring 206 are respectively abutted against the outer wall of the first annular chamber and the outer wall of the operating plate 204.

[0033] When it is necessary to clean up the excess lubricating oil, the slide bar 205 is pushed downward through the operating plate 204 so that the slide bar 205 compresses the pressure plate 203 to squeeze out the absorbed lubricating oil. After squeezing out, the operating plate 204 is released, and under the action of the return spring 206, the slide bar 205 is driven to slide upward to release the squeezing of the sponge 202.

[0034] See also Figure 5 and Figure 8 As shown, the collecting member includes a plurality of leakage holes 209 arranged in a matrix on the annular partition plate, and an oil outlet pipe 208 is fixedly provided on the bottom surface of the second annular chamber 207 .

[0035] After the sponge 202 is squeezed to release the lubricating oil, the lubricating oil flows from the leakage hole 209 into the second annular chamber 207 for collection. After the device is used, the collected lubricating oil can be discharged through the oil outlet pipe 208 for recovery.

[0036] See also Figure 5-Figure 8 As shown, a sliding surface inclined toward the oil outlet pipe 208 is provided in the second annular chamber 207 .

[0037] It is convenient to collect and export the squeezed lubricating oil from the oil outlet pipe 208.

[0038] See also Figure 1 As shown, the lubrication mechanism 300 further includes an oil inlet 301 , and a sealing plug is provided on the oil inlet 301 .

[0039] Lubricating oil is injected into the oil chamber 302 through the oil inlet 301 . When the moving ring 102 rotates, the sealing plug is tightly closed to prevent the lubricating oil from flowing out of the oil chamber 302 .

[0040] See also Figure 4 As shown, a sealing ring 304 is arranged around the edge of one side of the dynamic ring 102 close to the static ring 103 .

[0041] The sealing ring 304 can shield the lubricating oil applied on the contact surface and reduce the overflow of the lubricating oil.

[0042] See also Figure 2 As shown, the stationary ring 103 is rotatably mounted on the stationary ring mounting seat 104 via a bearing 105 .

[0043] The stationary ring 103 is mounted on the stationary ring mounting seat 104 via the bearing 105, so that the stationary ring 103 can be flexibly rotated and adjusted while maintaining the stability of the sealing performance.

[0044] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A mechanical sealing device with an improved structure, comprising a dynamic ring (102) and a static ring (103), wherein the surfaces of the dynamic ring (102) and the static ring (103) are used in a conflicting manner, characterized in that: The movable ring (102) is fixedly connected with a spring (101), and the other end of the spring (101) is abutted against a fixed seat (100). The movable ring (102) is provided with a lubricating mechanism (300), and the lubricating mechanism (300) comprises an oil chamber (302), and the oil chamber (302) is provided in the movable ring (102). Lubricating oil is stored in the oil chamber (302). The outer wall surface of the movable ring (102) close to the stationary ring (103) is provided with a plurality of oil outlet holes (303) equidistantly distributed along the circumferential direction of the movable ring (102). The stationary ring (103) is fixedly provided with a wiping mechanism (200) capable of absorbing excess lubricating oil, and the wiping mechanism (200) comprises a sponge (202) arranged at the intersection of the movable ring (102) and the stationary ring (103) and capable of absorbing excess lubricating oil.

2. A mechanical sealing device with an improved structure according to claim 1, characterized in that: The wiping mechanism (200) further comprises a fixed ring (201), wherein the fixed ring (201) is fixedly mounted on the stationary ring (103), and the fixed ring (201) is divided into a first annular chamber and a second annular chamber (207) by an annular partition, wherein the side of the first annular chamber in contact with the stationary ring (103) is open, and the sponge (202) is fixedly mounted in the first annular chamber, and an extrusion member for extruding the sponge (202) after absorbing the lubricating oil is provided on the first annular chamber, and a collecting member is provided in the second annular chamber (207).

3. A mechanical sealing device with an improved structure according to claim 2, characterized in that: The extrusion member includes a slide rod (205), the slide rod (205) slides through the top wall of the first annular chamber, a pressure plate (203) is fixedly provided at one end of the slide rod (205) located in the inner cavity of the first annular chamber, an operating plate (204) is fixedly provided at the other end of the slide rod (205), a return spring (206) is sleeved on the slide rod (205), and the two ends of the return spring (206) are respectively abutted against the outer wall of the first annular chamber and the outer wall of the operating plate (204).

4. A mechanical sealing device with an improved structure according to claim 2, characterized in that: The collecting member comprises a plurality of leakage holes (209) arranged in a matrix on an annular partition plate, and an oil outlet pipe (208) is fixedly arranged on the bottom surface of the second annular chamber (207).

5. A mechanical sealing device with an improved structure according to claim 4, characterized in that: The second annular chamber (207) is provided with a sliding surface inclined toward the oil outlet pipe (208).

6. A mechanical sealing device with an improved structure according to claim 1, characterized in that: The lubrication mechanism (300) further comprises an oil inlet (301), and a sealing plug is provided on the oil inlet (301).

7. A mechanical sealing device with an improved structure according to claim 6, characterized in that: A sealing ring (304) is arranged around the edge of one side of the dynamic ring (102) close to the static ring (103).

8. A mechanical sealing device with an improved structure according to claim 1, characterized in that: The stationary ring (103) is rotatably mounted on the stationary ring mounting seat (104) via a bearing (105).

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