An erosion and abrasion resistant mechanical seal structure

Abstract

The utility model discloses a kind of erosion-resistant, abrasion-resistant mechanical sealing structure, relate to mechanical sealing technical field, including main shaft and fixed sleeve set on the shaft sleeve of main shaft, the shaft sleeve is fixedly installed with outer end cap, annular base is installed in outer end cap inside, annular base inside is installed with mounting seat, mounting seat inside is installed with wear-resistant sealing seat;The annular base inside is also installed with the stationary ring that can be displaced along the main shaft axis direction, stationary ring is sealed with mounting seat cooperation, and the inner end of shaft sleeve is installed with the rotating ring that is sealed with stationary ring rotation cooperation, shaft sleeve, rotating ring, stationary ring, wear-resistant sealing seat, mounting seat, annular base and outer end cap are cooperated to form cooling cavity.The utility model can effectively play erosion-resistant, abrasion-resistant, so that mechanical sealing structure can be more stably normal work, prolong the service life of mechanical sealing structure.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and more specifically, to a mechanical seal structure that is resistant to erosion and wear. Background Technology

[0002] In most industries such as petroleum, chemical, papermaking, and power, mechanical seals are used in more than 80% of fluid transport equipment. In mining, metallurgy, and other industries, most working media not only contain solid particles but also have a high solid content. The erosion and wear caused by these solid particles have always been a problem for mechanical seals during normal use. At the same time, the adaptability and extended service life of mechanical seals have always been the research and development directions in the field of mechanical seals. For mechanical seals to work properly, the rational design of each component and the appropriate selection of materials are required to meet the usage requirements.

[0003] Therefore, there is an urgent need for a mechanical seal structure that is resistant to erosion and wear, so as to solve the problem of normal use of mechanical seals in special working conditions containing solid particles and with high solid content. Utility Model Content

[0004] The purpose of this utility model is to provide a mechanical seal structure that is resistant to erosion and wear, effectively resisting erosion and wear, enabling the mechanical seal structure to work more stably and extending its service life.

[0005] To achieve the purpose of this utility model, the technical solution adopted is as follows: a mechanical seal structure that is resistant to erosion and wear, including a main shaft and a bushing fixedly sleeved on the main shaft. An outer end cover is fixedly installed on the bushing, an annular base is installed inside the outer end cover, a mounting seat is installed inside the annular base, and a wear-resistant sealing seat is installed inside the mounting seat. A stationary ring that can move along the axis of the main shaft is also installed inside the annular base. The stationary ring is sealed with the mounting seat, and a rotating ring that rotates and seals with the stationary ring is installed inside the bushing. The bushing, rotating ring, stationary ring, wear-resistant sealing seat, mounting seat, annular base, and outer end cover work together to form a cooling chamber.

[0006] Furthermore, the stationary ring, wear-resistant sealing seat, and rotating ring are all made of stainless steel, and the parts of the stationary ring, wear-resistant sealing seat, and rotating ring that are in direct contact with the internal medium of the equipment all have a wear-resistant hard alloy layer.

[0007] Furthermore, the rotating ring is sleeved on both the bushing and the main shaft, and a transmission pin is also installed on the bushing. A semi-circular key is installed on the transmission pin, and the semi-circular key is embedded in the rotating ring.

[0008] Furthermore, the semicircular key is made of copper.

[0009] Furthermore, a compression spring is also installed between the stationary ring and the annular base.

[0010] Furthermore, the stationary ring is also equipped with an anti-rotation pin extending toward the annular base, and the annular base has a guide hole that slides with the anti-rotation pin.

[0011] Furthermore, a positioning plate is provided on the outer side of the outer end cover, and the positioning plate is connected to the outer end cover by bolts.

[0012] Furthermore, the outer end cap, at the end furthest from the annular base, is also provided with a sealing ring that seals with the bushing.

[0013] Furthermore, the outer end cover is also provided with a cooling water inlet and a cooling water outlet that are connected to the cooling chamber.

[0014] The beneficial effects of this utility model are:

[0015] 1. The mechanical seal structure provided by this utility model effectively resists erosion and wear in special working conditions containing solid particles and with high solid content. Compared with conventional mechanical seals, it can better protect the core components, enabling the mechanical seal structure to work more stably, extending the service life of the mechanical seal structure, and is economical and practical.

[0016] 2. The stationary ring, mounting base, and rotating ring in this utility model are made of stainless steel, and a wear-resistant hard alloy layer is provided at the parts that directly contact the internal medium of the equipment. This not only facilitates the installation of the stationary ring, mounting base, and rotating ring, but also allows the wear-resistant hard alloy layer to wrap around the main body of the mechanical seal structure, preventing the main body from being washed away or eroded by the medium.

[0017] 3. The semi-circular key in this utility model is made of copper, so that it will not be subjected to excessive torque during operation, thus avoiding unnecessary damage to the rotating ring transmission mechanism; at the same time, through the cooperation of the semi-circular key and the transmission screw, the bushing can effectively transmit torque while being subjected to scouring under the centrifugal force of the rotating ring when it drives the rotating ring to rotate synchronously. Attached Figure Description

[0018] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0019] Figure 1 This is a structural diagram of the erosion-resistant and wear-resistant mechanical seal structure provided by this utility model.

[0020] The attached diagram shows the markings and corresponding component names:

[0021] 1. Spindle, 2. Outer end cover, 3. Annular base, 4. Mounting seat, 5. Wear-resistant sealing seat, 6. Stationary ring, 7. Rotating ring, 8. Transmission screw, 9. Semicircular key, 10. Anti-rotation pin, 11. Guide hole, 12. Compression spring, 13. Sealing ring, 14. Positioning plate, 15. Cooling water outlet, 16. Bushing, 17. Cooling chamber. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0023] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figure 1 As shown, the present invention provides a mechanical seal structure that is resistant to erosion and wear, including a main shaft 1 and a bushing 16 fixedly sleeved on the main shaft 1, with the bushing 16 and the main shaft 1 in a sealing fit. An outer end cover 2 is installed at the end of the bushing 16 away from the inside of the equipment. An annular base 3 is fixedly installed on the side of the outer end cover 2 near the inside of the equipment by bolts. An mounting seat 4 is fixedly installed on the side of the annular base 3 near the inside of the equipment by bolts, and a wear-resistant sealing seat 5 is fixedly installed on the side of the mounting seat 4 near the inside of the equipment. At the same time, a rotating ring 7 is also installed at the end of the bushing 16 near the inside of the equipment, and a stationary ring 6 that can be displaced along the axis of the main shaft 1 is installed on the side of the mounting seat 4 near the inside of the equipment. The stationary ring 6 and the mounting seat 4 are in a rotating sealing fit, and the wear-resistant sealing seat 5 is in a sealing fit with the stationary ring 6.

[0025] In this invention, after the bushing 16, rotating ring 7, stationary ring 6, wear-resistant sealing seat 5, mounting seat 4, annular base 3, and outer end cover 2 are installed, the bushing 16, rotating ring 7, stationary ring 6, wear-resistant sealing seat 5, mounting seat 4, annular base 3, and outer end cover 2 work together to form a sealed cooling chamber 17. Cooling medium can be injected into the cooling chamber 17, so that the sealing structure can cool the spindle 1 while maintaining its sealing performance, thereby avoiding the failure of the sealing performance of the sealing structure.

[0026] Through the combined action of the rotating ring, stationary ring 6, wear-resistant sealing seat 5, and mounting seat 4, the mechanical seal structure effectively resists erosion and wear in special working conditions containing solid particles and with high solid content. Compared with conventional mechanical seals, it can better protect the core components, enabling the mechanical seal structure to operate more stably and extending its service life.

[0027] In this utility model, in order to facilitate the installation of the stationary ring 6, the wear-resistant sealing seat 5 and the rotating ring 7, the stationary ring 6, the wear-resistant sealing seat 5 and the rotating ring 7 are all made of stainless steel. In order to further improve the erosion resistance and wear resistance of the mechanical seal structure, the parts of the stationary ring 6, the wear-resistant sealing seat 5 and the rotating ring 7 that are in direct contact with the internal medium of the equipment are all covered with a wear-resistant hard alloy layer, and the wear-resistant sealing seat 5 is fixed to the mounting base 4 by embedding.

[0028] In this invention, during installation, the rotating ring 7 is fitted onto both the bushing 16 and the main shaft 1. The bushing 16 has a radially extending threaded hole into which a transmission pin 8 is installed. The extended end of the transmission pin 8 is pin-shaped. A semi-circular key 9 is embedded in the rotating ring 7. The center of the semi-circular key 9 has a pin hole for inserting the extended end of the transmission pin 8, thus connecting the transmission pin 8 and the semi-circular key 9. In this invention, the transmission of the rotating ring 7 is achieved through the cooperation of the semi-circular key 9 and the transmission pin 8. This allows the bushing 16 to effectively transmit torque while the rotating ring 7 is subjected to centrifugal force and scouring, as it rotates synchronously.

[0029] In this invention, the semicircular key 9 is made of copper, and the semicircular key 9 can be pure copper or copper alloy, so that it will not cause unnecessary damage to the transmission mechanism of the rotating ring 7 due to excessive torque during operation.

[0030] In this utility model, a compression spring 12 is also installed between the stationary ring 6 and the rotating base. One end of the compression spring 12 is fixed to the stationary ring 6, and the other end of the compression spring 12 is embedded in the rotating base. This not only enables the compression spring 12 to be stably installed, but also ensures that the stationary ring 6 is always pressed against the rotating ring 7 by the elastic force of the compression spring 12, thus ensuring that the stationary ring 6 and the rotating ring 7 are always in a rotating and sealed fit.

[0031] To ensure that the stationary ring 6 remains in a straight line when it moves along the axis of the main shaft 1, an anti-rotation pin 10 is installed on the side of the stationary ring 6 near the rotating base. The axis of the anti-rotation pin 10 is aligned with the axis of the main shaft 1, and the extended end of the anti-rotation pin 10 extends toward the rotating base. The rotating base is also provided with a guide hole 11 for inserting the anti-rotation pin 10 and slidingly engaging with it. This not only ensures that the stationary ring 6 can move along the axis of the main shaft 1, but also ensures the coaxiality of the stationary ring 6 and the rotating ring 7, thus guaranteeing the rotational seal between the stationary ring 6 and the rotating ring 7.

[0032] In this utility model, in order to ensure the installation of the outer end cover 2, a positioning plate 14 is provided on the outer side of the outer end cover 2, and the positioning plate 14 is connected to the outer end cover 2 by bolts.

[0033] In this invention, to ensure the sealing of the cooling chamber 17, a sealing ring 13, which is a lip seal, is installed on the inner surface of the outer end cover 2 away from the annular base 3 to seal against the outer wall of the bushing 16. To ensure the sealing between the rotating ring 7 and the main shaft 1 and the bushing 16, O-rings are also embedded on the bushing 16 and the rotating ring 7. To ensure the sealing between the wear-resistant sealing seat 5 and the stationary ring 6, an O-ring is also embedded on the wear-resistant sealing seat 5. To ensure the sealing between the annular base 3 and the outer end cover 2 and the mounting seat 4, O-rings are also embedded on both sides of the rotating base.

[0034] In this utility model, in order to ensure the cooling medium enters the cooling chamber 17 and the cooling medium in the cooling chamber 17 is discharged, the outer end cover 2 is also provided with a cooling water inlet (not shown in the figure) and a cooling water outlet 15 communicating with the cooling chamber 17. In order to prevent the cooling medium entering the cooling chamber 17 from being discharged directly from the cooling water outlet 15 without sufficient heat exchange, the cooling water inlet is located at the lower part of the outer end cover 2 and the cooling water outlet 15 is located at the upper part of the outer end cover 2.

[0035] When this utility model is in operation, the bushing 16 rotates synchronously with the main shaft 1. While the bushing 16 rotates, it drives the rotating ring 7 to rotate synchronously through the transmission screw 8 and the semi-circular key 9. During this process, the outer end cover 2, the annular base 3, the mounting seat 4, the wear-resistant sealing seat 5, and the stationary ring 6 do not rotate with the rotating ring 7, so that the stationary ring 6 and the rotating ring 7 form relative motion. At the same time, the compression spring 12 pushes the stationary ring 6 to always be in contact with the rotating ring 7 through its own elastic force, so that the stationary ring 6 and the rotating ring 7 maintain a sealing effect.

[0036] The O-rings on the inner surface of the outer end cover 2, the O-rings between the rotating part and the main shaft 1, the O-rings between the rotating part and the bushing 16, the O-rings between the wear-resistant sealing seat 5 and the stationary ring 6, the O-rings between the mounting seat 4 and the annular base 3, and the O-rings between the annular base 3 and the outer end cover 2 work together to effectively prevent media leakage.

[0037] In addition, during the use of the mechanical seal structure, the cooling medium enters the cooling chamber 17 through the cooling water inlet. The cooling medium in the cooling chamber 17 exchanges heat with the heat transferred to the spindle 1 and the bushing 16, and is then discharged through the cooling water outlet 15 after the heat exchange.

[0038] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A mechanical seal structure that is resistant to erosion and wear, characterized in that, The assembly includes a main shaft (1) and a bushing (16) fixedly sleeved on the main shaft (1). An outer end cover (2) is fixedly installed on the bushing (16). An annular base (3) is installed inside the outer end cover (2). An mounting seat (4) is installed inside the annular base (3). A wear-resistant sealing seat (5) is installed inside the mounting seat (4). A stationary ring (6) that can move along the axis of the main shaft (1) is also installed inside the annular base (3). The stationary ring (6) is sealed to the mounting seat (4). A rotating ring (7) that rotates and seals with the stationary ring (6) is installed inside the bushing (16). The bushing (16), rotating ring (7), stationary ring (6), wear-resistant sealing seat (5), mounting seat (4), annular base (3) and outer end cover (2) work together to form a cooling chamber (17).

2. The erosion-resistant and wear-resistant mechanical seal structure according to claim 1, characterized in that, The stationary ring (6), wear-resistant sealing seat (5) and rotating ring (7) are all made of stainless steel, and the parts of the stationary ring (6), wear-resistant sealing seat (5) and rotating ring (7) that are in direct contact with the internal medium of the equipment are all covered with wear-resistant hard alloy layers.

3. The erosion-resistant and wear-resistant mechanical seal structure according to claim 1, characterized in that, The rotating ring (7) is sleeved on the bushing (16) and the main shaft (1), and a transmission pin (8) is also installed on the bushing (16). A semi-circular key (9) is installed on the transmission pin (8), and the semi-circular key (9) is embedded in the rotating ring (7).

4. The erosion-resistant and wear-resistant mechanical seal structure according to claim 3, characterized in that, The semicircular key (9) is made of copper.

5. The erosion-resistant and wear-resistant mechanical seal structure according to claim 1, characterized in that, A compression spring (12) is also installed between the stationary ring (6) and the annular base (3).

6. The erosion-resistant and wear-resistant mechanical seal structure according to claim 5, characterized in that, The stationary ring (6) is also equipped with an anti-rotation pin (10) extending toward the annular base (3), and the annular base (3) has a guide hole (11) that slides with the anti-rotation pin (10).

7. The erosion-resistant and wear-resistant mechanical seal structure according to claim 1, characterized in that, A positioning plate (14) is provided on the outer side of the outer end cover (2), and the positioning plate (14) is connected to the outer end cover (2) by bolts.

8. The erosion-resistant and wear-resistant mechanical seal structure according to claim 1, characterized in that, The outer end cap (2) is also provided with a sealing ring (13) that seals with the bushing (16) at the end away from the annular base (3).

9. The erosion-resistant and wear-resistant mechanical seal structure according to claim 1, characterized in that, The outer end cap (2) is also provided with a cooling water inlet and a cooling water outlet (15) that are connected to the cooling chamber (17).

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