CN116378994A - Double-end-face mechanical sealing structure and corrosion-resistant pump - Google Patents

Abstract

The utility model relates to a bi-polar face mechanical seal structure and corrosion-resistant pump, including the quiet ring subassembly that has the quiet ring of medium side, have the rotating ring subassembly and the cooling module of the rotating ring of medium side, the quiet ring of medium side with the impeller shaft is worn to locate in proper order to the rotating ring of medium side, the quiet ring of medium side has first ladder portion and second ladder portion, first ladder portion butt is in the pump cover, be provided with the quiet ring seal of main between first ladder portion and the pump cover, the rotating ring of medium side has contact portion, contact portion butt is in the second ladder portion of the quiet ring of medium side, be provided with the drive ring sealing washer between rotating ring of medium side and the impeller shaft. The corrosion-resistant pump comprises the double-end-face mechanical sealing structure, and the effect of contact between each part and a corrosive medium is reduced.

Description

Double-end-face mechanical sealing structure and corrosion-resistant pump

Technical Field

The application relates to the field of pumps, in particular to a double-end-face mechanical sealing structure and a corrosion-resistant pump.

Background

The plastic pump is widely applied to the industry for conveying various clear liquids or slurries of acid, alkali, salt, oil and the like, and the overflow parts contacted with the medium have strong corrosion resistance by adopting a plastic lining process. Therefore, the pump can replace pumps made of special materials such as Monel alloy, hastelloy alloy, titanium alloy and the like in a specific environment, and the cost is greatly saved.

Since the conveying medium of the plastic pump is mostly a highly corrosive medium, each part contacted with the medium by the mechanical seal must resist the corrosion of the medium, otherwise, the parts need to be replaced frequently under the corrosion of the medium, and the parts are small and precise, so that the conventional material lining plastic process cannot be adopted, and therefore special materials need to be specified. Many special materials are expensive and difficult to process, thus increasing manufacturing costs.

Disclosure of Invention

In order to reduce replacement of parts and reduce manufacturing cost, the application provides a corrosion-resistant pump and a double-end-face mechanical sealing structure for reducing contact between each part and corrosive media.

In a first aspect, the present application provides a double-end-face mechanical seal structure, which adopts the following technical scheme:

the utility model provides a bi-polar face mechanical seal structure, includes the quiet ring subassembly that has the quiet ring of medium side, has the moving ring subassembly and the cooling module of the quiet ring of medium side, the quiet ring of medium side with the impeller shaft is worn to locate in proper order to the medium side moving ring, the quiet ring of medium side has first ladder portion and second ladder portion, first ladder portion butt is in the pump cover, be provided with main quiet ring seal between first ladder portion and the pump cover, the moving ring of medium side has contact portion, contact portion butt is in the second ladder portion of the quiet ring of medium side, be provided with the initiative ring seal between moving ring and the impeller shaft.

By adopting the technical scheme, when the impeller shaft rotates, the medium side stationary ring is not moved, the medium side movable ring and the impeller shaft synchronously rotate, and the main stationary ring sealing ring is arranged between the first step part of the medium side stationary ring and the pump cover, so that pumped medium cannot leak out from between the first step part and the pump cover; a driving ring sealing ring is arranged between the medium side moving ring and the impeller shaft, so that pumped medium cannot leak out from between the first step part and the pump cover, and the contact part is abutted against the second step part of the medium side stationary ring, so that leakage of medium liquid from between the medium side stationary ring and the medium side moving ring is prevented in a mechanical sealing mode. Therefore, pumped media only contact the medium side static ring and the medium side moving ring, contact of the media to all parts of other mechanical seals is reduced, the parts of the mechanical seals are not corroded, the frequency of replacing the parts is reduced, cost is reduced, and the cooling assembly is used for cooling the medium side static ring and the medium side moving ring so as to prolong the service life of equipment.

Optionally, the first step part includes a circumferential first step ring surface and an axial first step ring surface, the circumferential first step ring surface is abutted against the pump cover and forms an included angle smaller than or equal to 90 ° with the axial first step ring surface, and the main static ring seal ring is abutted against the axial first step ring surface or the circumferential first step ring surface; the stationary ring assembly further comprises a gland seat, and the gland seat is abutted to the second step portion.

By adopting the technical scheme, when the included angle between the circumferential first stepped annular surface and the axial first stepped annular surface is 90 degrees, the medium side static ring can be conveniently machined. When the included angle between the circumferential first stepped annular surface and the axial first stepped annular surface is smaller than 90 degrees and forms an acute angle, a reaction force is generated when the first stepped portion of the medium side static ring is abutted against the pump cover, so that the pump cover can generate a pushing component force on the first stepped portion, and the component force is in the axial direction of the medium side static ring, so that the compacting effect can be further improved. Meanwhile, in the process that the medium liquid permeates from the circumferential first stepped annular surface to the axial first stepped annular surface, the angle required to rotate is an obtuse angle, and the medium liquid is subjected to more resistance, so that the permeation is reduced, and the sealing effect of the pump cover and the medium side static ring is improved. The gland seat is abutted against the second step part, and the pump cover and the gland seat limit the static ring on the medium side, so that the static ring on the medium side is limited to move in the axial direction of the impeller shaft in a clamping mode. Thereby improving the stability of the static ring at the medium side.

Optionally, the moving ring assembly further comprises a shaft sleeve and a spring seat, the shaft sleeve is sleeved on the impeller shaft, one end of the shaft sleeve is abutted against the driving ring sealing ring, the other end of the shaft sleeve is fixedly connected with the impeller shaft through a screw, the spring seat is sleeved on the shaft sleeve and is fixedly connected with the shaft sleeve, a spring in the spring seat is abutted against one end, far away from the contact part, of the medium side moving ring, and the shaft sleeve or the spring seat drives the medium side moving ring to rotate when rotating.

Through adopting above-mentioned technical scheme, the axle sleeve cover is established on the impeller shaft, makes the spring holder can match the diameter of axle of impeller shaft, can make things convenient for the spring holder to embolia the impeller shaft under the effect of axle sleeve to can reduce when the impeller shaft is moving because the phenomenon that the direction skew appears in vibration, the spring holder has elasticity, can guarantee that medium side moving ring can directly butt in the contact surface of medium side stationary ring, reduces the medium liquid and spills from between medium side moving ring and the medium side stationary ring, has certain elasticity compensation simultaneously, can realize that the impeller shaft makes medium side moving ring and the relative rotation of medium side stationary ring when rotating.

Optionally, the spring holder is provided with the transmission arch, the medium side moving ring set up with the transmission recess of transmission protruding looks adaptation.

Through adopting above-mentioned technical scheme, when the transmission protrusion on the spring holder and entering transmission recess, make the spring holder can let medium side moving ring also transmission relatively when rotating, the spring holder can dismantle the setting with medium side moving ring moreover, can conveniently change the medium side moving ring after wearing and tearing for a long time.

Optionally, the axle sleeve has seted up the cotter way, the transmission groove has been seted up to the medium side rotating ring, the cotter way with install the driving pin in the transmission groove, the driving pin has the butt portion, one of them face butt of butt portion in the inside wall of transmission groove, the another side butt of butt portion in the outer annular of axle sleeve.

Through adopting above-mentioned technical scheme, set up the transfer pin between cotter way and the transfer slot, realize that the axle sleeve can drive medium side movable ring through the transfer pin when pivoted and rotate, one of them face butt of butt in the inside wall of transfer slot keeps the state of butt always, can directly transmit the force to medium side movable ring when the axle sleeve rotates, and can not make the butt bump into the inside wall of transfer slot, avoid impact load, the other face butt of butt in the outer ring face of axle sleeve, can make the most component that the transfer pin bore reduce the moment of flexure that the transfer pin received for the shearing force, thereby improve the life of transfer pin.

Optionally, the holding tank has been seted up to the contact, be provided with clearance piece and elastic piece in the holding tank, elastic piece one end is fixed in the holding tank inside wall, the other end butt of elastic piece in clearance piece forces clearance piece towards the quiet ring direction of medium side motion, clearance piece is close to medium side quiet ring direction has the scraping portion, the elastic piece forces scraping portion butt in the quiet ring of medium side.

Through adopting above-mentioned technical scheme, the holding tank can provide the displacement space for the clearance piece, and the elastic sheet butt clearance piece keeps holding the power state always, can force scraping portion butt always in the quiet ring of medium side. The elastic piece has compensation effect to the displacement of clearance piece, and after the medium side movable ring was worn and torn, the striking-off portion of clearance piece can clear up the granule of wearing and tearing, and striking-off portion is because the butt strength to the medium side stationary ring is not strong simultaneously, can not cause excessive wearing and tearing.

Optionally, the cooling assembly includes the machine seal gland, the machine seal gland with have the cooling chamber between the medium side movable ring, be provided with the guide holder in the cooling chamber, the machine seal gland has cooling entry and cooling export, the guide holder separates into first chamber and second chamber with the cooling chamber, the cooling entry with first chamber intercommunication, first chamber with second chamber intercommunication, the second chamber with cooling export intercommunication.

By adopting the technical scheme, the mechanical sealing gland is taken as the shell to protect the mechanical sealing structure, meanwhile, a cooling cavity is formed between the medium side movable rings, cooling water can flow into the cooling cavity, and the heat of the medium side movable rings during working can be reduced; the cooling cavity is divided into the first cavity and the second cavity by the flow guide seat, the first cavity is communicated with the cooling inlet, the first cavity plays a buffering role, cooling water is enabled to enter the first cavity from the cooling inlet and then impact on the flow guide seat without directly impacting on the medium side stationary ring and the medium side movable ring to be contacted, and impact load can be reduced. The second cavity can enable cooling water to flow out of the cooling outlet through the medium side static ring, the medium side dynamic ring and the spring seat in sequence, so that the flow path of the cooling water in the cooling cavity is prolonged, and the cooling effect of the friction surface is improved.

Optionally, the cooling inlet and the cooling outlet are respectively connected with a circulating cooling pipe, the circulating cooling pipe is connected with a circulating device, the circulating device is arranged on the impeller shaft, the impeller shaft is connected with a gear ring, and the gear ring is a driving part of the circulating device.

By adopting the technical scheme, the circulating device can realize the flow of cooling water; the circulating cooling pipe is respectively communicated with the cooling inlet and the cooling outlet and then is connected with the circulating device, so that circulating cooling is realized, a gear ring in the circulating device is arranged on the impeller shaft, and the power of the impeller shaft can be used as a driving shaft, so that when the impeller shaft works, cooling water can enter into the circulating device immediately, and the cooling efficiency is improved.

Optionally, the junction of cooling outlet with the circulative cooling pipe is provided with the water filling port, the water filling port is plugged up by the stopper, the stopper is fixed with the filter ring, the filter ring is kept away from the one end of stopper stretches into in the cooling outlet.

Through adopting above-mentioned technical scheme, the water filling mouth can pour the coolant liquid into the cooling chamber, and the stopper plugs up the cooling mouth and makes the cooling chamber be in the closed state to can provide the cooling. Since the cooling water is directed in a single direction, the cooling water passes through the filter ring, and the filter ring can filter out worn metal particles in the cooling water, so that the service life of the cooling water can be prolonged.

In a second aspect of the present invention,

the application provides a corrosion-resistant pump, corrosion-resistant pump is provided with above-mentioned bi-polar face mechanical seal structure

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

1. by arranging the driving ring sealing ring and the main static ring sealing ring, pumped media can only contact with the medium side static ring and the medium side dynamic ring, so that the contact of the media to all parts of other mechanical seals is reduced, the parts of the mechanical seals cannot be corroded, the frequency of part replacement is reduced, and the cost is reduced.

2. The scraping part of the cleaning piece can clean worn particles, and meanwhile, the scraping part is not strong in abutting strength to the static ring at the medium side, so that excessive wear cannot be caused.

Drawings

Fig. 1 is a schematic view of the overall structure of a corrosion-resistant pump according to the first embodiment.

Fig. 2 is a schematic cross-sectional view of the mechanical seal structure inside the corrosion-resistant pump according to the first embodiment.

Fig. 3 is an enlarged schematic view of the structure at a in fig. 2.

Fig. 4 is a partial schematic view of a spring seat.

Fig. 5 is a schematic view of the structure of the medium side ring and the sleeve in the second embodiment.

Fig. 6 is an enlarged schematic view of the structure at D in fig. 5.

Fig. 7 is a schematic view showing the external structure of a cooling module according to the third embodiment.

Fig. 8 is a schematic cross-sectional view of the mechanical seal structure inside the corrosion-resistant pump of the third embodiment.

Fig. 9 is an enlarged schematic view of the structure at B in fig. 8.

Fig. 10 is a schematic cross-sectional view of the mechanical seal structure inside the corrosion-resistant pump of the third embodiment.

Fig. 11 is an enlarged schematic view of the structure at C in fig. 3.

Fig. 12 is a schematic structural view of a medium side ring in the third embodiment.

Fig. 13 is a schematic structural view of the cleaning member.

Fig. 14 is a schematic view showing the overall structure of the corrosion-resistant pump of the fourth embodiment.

Reference numerals illustrate: 1. a stationary ring assembly; 11. a medium side stationary ring; 111. a first step portion; 1111. a circumferential first stepped annulus; 1112. an axial first stepped annulus; 1113. a circumferential first stepped annular groove; 112. a second step portion; 1121. a circumferential second stepped annulus; 1122. a contact surface; 1123. a gland groove; 12. a primary stationary ring seal ring; 13. an atmospheric stationary ring; 14. a transition surface; 15. a secondary stationary ring seal ring; 2. a moving ring assembly; 21. a media side ring; 211. a contact portion; 212. sealing grooves; 22. a drive ring seal ring; 23. a shaft sleeve; 231. a pin slot; 232. a transmission groove; 2321. a lateral opening; 233. a drive pin; 2331. an abutting portion; 234. an outer annulus; 24. a spring seat; 241. a transmission protrusion; 242. a transmission groove; 25. an atmosphere-side moving ring; 3. a cooling assembly; 31. a circulating cooling pipe; 311. externally connected with a cooling water tank; 32. a circulation device; 33. a gear ring; 34. a cooling inlet; 35. a cooling outlet; 36. a water filling port; 37. a plug; 38. a cooling chamber; 381. a first chamber; 382. a second chamber; 39. a diversion seat; 371. an arc-shaped block; 372. a filter ring; 4. a receiving groove; 41. cleaning the piece; 411. a scraping section; 4111. a guide groove; 42. an elastic sheet; 101. an impeller shaft; 102. a pump cover; 103. a gland seat; 104. and (5) mechanically sealing the gland.

Detailed Description

The present application is described in further detail below in conjunction with fig. 1-14.

The embodiment of the application discloses a double-end-face mechanical sealing structure.

Embodiment one:

referring to fig. 1 and 2, a double-end-face mechanical seal structure comprises a stationary ring assembly 1 and a movable ring assembly 2, wherein the stationary ring assembly 1 and the movable ring assembly 2 are respectively arranged on an impeller shaft 101 in a penetrating manner, the stationary ring assembly 1 rotates relative to the axis of the impeller shaft 101, and the movable ring assembly 2 is static relative to the axis of the impeller shaft 101.

Referring to fig. 3, the stationary ring assembly 1 includes a medium side stationary ring 11 and an atmosphere side stationary ring 13; the moving ring assembly 2 comprises a medium side moving ring 21, an atmosphere side moving ring 25 and a spring seat 24 with a spring inside, one end of an impeller shaft 101 is an impeller, the other end of the impeller shaft is an axis, and when the impeller is installed, a pump cover 102 is sleeved into the impeller shaft 101 from the axis, so that the pump cover 102 is close to the impeller. Then, the medium-side stationary ring 11, the medium-side movable ring 21, the spring seat 24, the atmosphere-side movable ring 25, and the atmosphere-side stationary ring 13 are sleeved in order from the bearing of the impeller.

One side of the stationary ring 11 abuts against the pump cover 102, and the other side abuts against the gland seat 103. The cross section of the medium-side stationary ring 11 is in a convex shape, and the side of the medium-side stationary ring 11 facing the pump cover 102 is provided with a first step 111 and the side facing away from the pump cover 102 is provided with a second step 112.

The first step portion 111 has a circumferential first step annular surface 1111 and an axial first step annular surface 1112, the pump cover 102 is provided with a circumferential first step annular groove 1113 adapted to the circumferential first step annular surface 1111, and in this embodiment, the diameter of the circumferential first step annular groove 1113 is equal to or slightly smaller than the circumferential first step annular surface 1111, so that the circumferential first step annular surface 1111 of the medium side stationary ring 11 is mounted to the circumferential first step annular groove 1113, and tight fit between the pump cover 102 and the medium side stationary ring 11 can be achieved. For ease of machining, the circumferential first stepped annular surface 1111 and the axial first stepped annular surface 1112 may be 90 °, or in other embodiments, the two surfaces may be smaller than 90 ° so that the circumferential first stepped annular surface 1111 and the axial first stepped annular surface 1112 form an acute angle therebetween. A main static ring sealing ring 12 is arranged between the circumferential first stepped annular surface 1111 and the pump cover 102, the main static ring sealing ring 12 is made of rubber materials, and the axial first stepped annular surface 1112 can extrude the main static ring sealing ring 12 during installation, so that the sealing effect is improved.

The axial first stepped annular surface 1112 and the second stepped portion 112 are connected by a transition surface 14, the transition surface 14 also being a close fit with the pump cap 102. In this embodiment, a secondary static ring seal 15 is disposed between the transition surface 14 and the pump cover 102. In other embodiments, the primary static ring seal 12 may be disposed between the circumferential first stepped annular surface 1111 and the circumferential first stepped annular groove 1113; a secondary static ring seal 15 is disposed between the axial first stepped annular surface 1112 and the pump cap 102.

The second stepped portion 112 has a circumferential second stepped annular surface 1121 and a contact surface 1122, the circumferential second stepped annular surface 1121 being located on a side of the transition surface 14 remote from the circumferential first stepped annular surface 1111. The gland seat 103 has a gland groove 1123, and when installed, the gland groove 1123 snaps into the circumferential second stepped annular surface 1121 and the contact surface 1122. The gland seat 103 and the pump cover 102 are clamped with each other to fix the medium side stationary ring 11.

Referring to fig. 4, the medium side moving ring 21 has a contact portion 211, and the spring in the spring seat 24 urges the medium side moving ring 21 so that the contact portion 211 of the medium side moving ring 21 is forced to abut against the contact surface 1122 of the medium side stationary ring 11. The medium-side ring 21 has a seal groove 212, and a drive ring seal 22 is provided in the seal groove 212. The moving ring assembly 2 further comprises a shaft sleeve 23, the medium side moving ring 21 passes through the impeller shaft 101 and is sleeved with the driving ring seal 22, then the shaft sleeve 23 is sleeved, the end part of the shaft sleeve 23 pushes the driving ring seal 22 into the sealing groove 212, the diameter of the sealing groove 212 is smaller than the outer ring diameter of the driving ring seal 22, the driving ring seal 22 is made of elastic materials in the embodiment, the driving ring seal 22 is pushed by the shaft sleeve 23, the driving ring seal 22 enters the sealing groove 212, the shaft sleeve 23 can force the driving ring seal 22 to abut against the axial side wall of the sealing groove 212, and meanwhile, the axial side wall of the sealing groove 212 can abut against the driving ring seal 22 due to the fact that the diameter of the sealing groove 212 is smaller than that of the driving ring seal 22, and the driving ring seal can abut against the shaft 101.

Referring to fig. 3 and 4, a spring seat 24 is fitted over the sleeve 23, and then sequentially fitted into the atmosphere-side moving ring 25 and the atmosphere-side stationary ring 13. The springs are arranged in a plurality along the axial direction of the shaft sleeve 23, and the spring seats 24 are used for limiting the springs so that the distance between each two springs is equal. One end of the spring pushes the medium side movable ring 21 to force the medium side movable ring 21 to be abutted against the medium side stationary ring 11, so that mechanical sealing of one end face is realized; the other end of the spring pushes the atmosphere side movable ring 25, so that the atmosphere side movable ring 25 is forced to be abutted against the atmosphere side static ring 13, and mechanical sealing of the other end face is realized.

Referring to fig. 3 and 4, the spring seat 24 is provided with a plurality of driving protrusions 241, the driving protrusions 241 are circumferentially arranged along the axial direction of the spring seat 24, and the medium side moving ring 21 is provided with driving grooves 242 adapted to the driving protrusions 241. When the spring seat 24 is installed, the transmission boss 241 of the spring seat 24 is inserted into the transmission groove 242, the spring seat 24 is fixedly connected with the shaft sleeve 23 through a bolt, and the shaft sleeve 23 is fixedly connected with the impeller shaft 101 through a bolt. When the impeller shaft 101 rotates, the shaft sleeve 23 and the spring seat 24 are driven to rotate, and the spring seat 24 drives the medium side movable ring 21 to rotate through the transmission boss 241. Thereby achieving a stationary media side ring 21 relative to the impeller shaft 101.

The embodiment of the application also discloses a corrosion-resistant pump, which comprises the double-end-face mechanical sealing structure.

The implementation principle of the first embodiment is as follows: when the corrosion-resistant pump works, the medium liquid contacts with the medium side movable ring 21 and the medium side static ring 11, and the impeller shaft 101 rotates to drive the circulating device 32 to rotate, so that cooling water in the cooling cavity 38 enters the circulating work to cool the medium side static ring 11, the medium side movable ring 21, the atmosphere side movable ring 25 and the atmosphere side static ring 13.

Embodiment two:

referring to fig. 5 and 6, the present embodiment is different from the first embodiment in that the transmission manner of the medium side ring 21 is driven by the shaft sleeve 23. The shaft sleeve 23 is provided with a pin slot 231, the medium side moving ring 21 is provided with a transmission slot 232, the transmission slot 232 is connected with the pin slot 231 through a transmission pin 233, the medium side moving ring 21 is sleeved on the impeller shaft 101, then the transmission pin 233 is inserted into the pin slot 231 of the shaft sleeve 23, the transmission pin 233 is partially exposed out of the pin slot 231, the exposed part is an abutting part 2331 of the transmission pin 233, the transmission slot 232 is provided with a lateral opening 2321, the shaft sleeve 23 provided with the transmission pin 233 is sleeved on the impeller shaft 101, then the abutting part 2331 of the transmission pin 233 is aligned with the lateral opening 2321 of the transmission slot 232, and the abutting part 2331 of the transmission slot 232 is pushed into the transmission slot 232 through the lateral opening 2321. For convenience of processing, the abutting portion 2331 of the driving pin 233 is semicircular, and the driving groove 232 of the shaft sleeve 23 is also semicircular. After the abutting part 2331 of the transmission pin 233 is mounted to the transmission groove 232, the cambered surface of the transmission groove 232 abuts against the cambered surface of the inner side wall of the transmission groove 232, so that surface contact is realized. In this embodiment, for convenience of processing, the portion of the abutting portion 2331 abutting against the outer annular surface 234 of the sleeve 23 is a plane, and the two are in line contact. In other embodiments, the abutting portion 2331 and the outer ring surface 234 of the shaft sleeve 23 may be processed into an arc, and the arc is equal to the arc of the outer ring surface 234 of the shaft sleeve 23, so as to form surface contact, thereby reducing the concentrated load applied to the driving pin 233 and improving the driving effect.

Embodiment III:

fig. 7 is a difference between the present embodiment and the first and second embodiments in that the double mechanical seal structure further includes a cooling module 3.

Referring to fig. 3, 8 and 9, the cooling assembly 3 includes a machine seal gland 104 and a guide seat 39, the machine seal gland 104 is fixedly connected with a gland seat 103 through bolts, a cooling cavity 38 is arranged between the interior of the machine seal gland 104 and the medium side moving ring 21, the guide seat 39 is installed in the cooling cavity 38 to divide the cooling cavity 38 into a first cavity 381 and a second cavity 382, the guide seat 39 is in a hollow annular cylinder shape, the first cavity 381 is positioned on the outer ring of the annular cylinder shape, the second cavity 382 is positioned on the outer ring of the annular cylinder shape, the first cavity 381 is communicated with the second cavity 382 to enable the cooling cavity 38 to be in a U shape, the machine seal gland 104 is also provided with a cooling inlet 34 and a cooling outlet 35, the first cavity 381 is communicated with the cooling inlet 34, the second cavity 382 is communicated with the cooling outlet 35, and the cooling inlet 34 and the cooling outlet 35 are positioned at two end parts of the U-shaped cooling cavity 38; in this embodiment, the dashed arrow indicates the flow direction of the cooling water, and the cooling water enters from the cooling inlet 34 to contact the guide seat 39 first, thereby reducing the flow buffering, and then flows out from the cooling outlet 35 after passing through the contact surface 1122 of the medium side stationary ring 11, the contact portion 211 of the medium side movable ring 21, the spring seat 24, the atmosphere side movable ring 25, and the atmosphere side stationary ring 13 in this order under the guide of the guide seat 39.

Referring to fig. 3, 9 and 10, the cooling inlet 34 and the cooling outlet 35 are connected with a circulation cooling pipe 31, and the circulation cooling pipe 31 has two sections, one section is connected with the cooling inlet 34, the other section is connected with the cooling outlet 35, and the two sections of circulation cooling pipes 31 are respectively connected with the outlet and the inlet of the circulation device 32. The circulation device 32 in this embodiment is a gear pump, and in other embodiments may be a cam pump, which may be used to realize a water pump for cooling water flow, the impeller shaft 101 is provided with a gear ring 33, the impeller shaft 101 is used as a power source to drive the circulation device 32 to work, the circulation device 32 is provided on the impeller shaft 101, and the casing of the impeller shaft 101 is fixedly connected with the casing of the pump. When the impeller shaft 101 rotates, the circulation device 32 starts to work, so that the cooling water can be circulated and cooled through the cooling cavity 38.

A water injection port 36 and a plug 37 are arranged between the cooling outlet 35 and the circulating cooling pipe 31, and the water injection port 36 is funnel-shaped, so that the cooling liquid can be conveniently injected. The cooling liquid may be water or other liquid for cooling. The plug 37 is used for plugging the water injection port 36 in a threaded manner, and the end part and the tail part of the threaded section of the plug 37 are provided with sealing rubber rings so as to realize sealing of the water injection port 36. One end of the plug 37 is provided with an arc-shaped block 371 which is convenient to rotate, the other end of the plug 37 is fixedly provided with a filter ring 372, after the plug 37 is installed on the water injection port 36, the filter ring 372 is positioned in the cooling outlet 35, cooling liquid flows out of the cooling outlet 35, passes through the filter ring 372 and then enters the circulating cooling pipe 31, and particles worn by two friction end faces of the mechanical seal are filtered by the filter ring 372.

Referring to fig. 11, the contact portion 211 of the medium side moving ring 21 is provided with a receiving groove 4, a cleaning member 41 and an elastic piece 42 are mounted in the receiving groove 4, one end of the elastic piece 42 is fixed to a groove wall of the receiving groove 4, the other end of the elastic piece 42 is in contact with the cleaning member 41, the cleaning member 41 is forced to move toward an opening direction of the receiving groove 4, and the opening of the receiving groove 4 faces the contact surface 1122 of the medium side stationary ring 11. The cleaning tool 41 has a scraping portion 411 on a side close to the contact surface 1122 of the medium-side stationary ring 11, and the scraping portion 411 is constantly abutted against the contact surface 1122 by the elastic piece 42. After the contact portion 211 is worn for a long time, the accommodating groove 4 and the elastic piece 42 elastically compensate the cleaning member 41, so that the scraping portion 411 can abut against the contact surface 1122 of the medium side stationary ring 11 on the one hand, and cannot abut tightly against the contact surface 1122 of the medium side stationary ring 11 due to the action of the elastic piece 42 on the other hand, thereby reducing the wear between the medium side stationary ring 11 and the cleaning member.

Referring to fig. 12 and 13, when the scraper 411 is curved away from the axis of the impeller shaft 101 and the medium-side movable ring 21 rotates, the scraper 411 can scrape away wear particles generated by friction between the contact portion 211 of the medium-side movable ring 21 and the contact surface 1122 of the medium-side stationary ring 11 by centrifugal force. The scraping portion 411 is further provided with a guide groove 4111, when the scraping portion 411 works, cooling water is thrown out from the position, negative pressure is easy to form, and cooling water at other positions can flow through the guide groove 4111 to reduce negative pressure.

The implementation principle of the third embodiment is as follows: when the corrosion-resistant pump works, the medium liquid contacts with the medium side movable ring 21 and the medium side static ring 11, and the impeller shaft 101 rotates to drive the circulating device 32 to rotate, so that cooling water in the cooling cavity 38 enters the circulating work to cool the medium side static ring 11, the medium side movable ring 21, the atmosphere side movable ring 25 and the atmosphere side static ring 13.

Embodiment four:

referring to fig. 14, the present embodiment is different from the third embodiment in that three circulation cooling pipes 31 are provided, the first circulation cooling pipe 31 has both ends connected to the cooling outlet 35 and the inlet of the external cooling water tank 311, the second circulation cooling pipe 31 connects the outlet of the external cooling water tank 311 and the inlet of the circulation device 32, and the third circulation cooling pipe 31 connects the inlet of the circulation device 32 and the cooling inlet 34. Through three circulating cooling water pipes, cooling water is pumped into the cooling cavity from the cooling cavity to the external cooling water tank 311, and then the cooling water in the external cooling water tank 311 is pumped into the cooling cavity through the circulating cooling device, so that cooling of the stationary ring and the movable ring in the cooling cavity is realized, and it is to be noted that the external cooling water tank 311 in the drawing is only schematic, and the specific structure and the mounting position of the external cooling water tank 311 are not specific.

The foregoing are preferred embodiments of the present application, and are not intended to limit the scope of the present application, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. The utility model provides a bi-polar face mechanical seal structure which characterized in that: including quiet ring assembly (1) that has medium side quiet ring (11), have moving ring assembly (2) and cooling module (3) of medium side moving ring (21), medium side quiet ring (11) with medium side moving ring (21) wear to locate impeller shaft (101) in proper order, medium side quiet ring (11) have first step portion (111) and second step portion (112), first step portion (111) butt is in pump cover (102), be provided with main quiet ring seal circle (12) between first step portion (111) and pump cover (102), medium side moving ring (21) have contact portion (211), contact portion (211) butt is in second step portion (112) of medium side quiet ring (11), be provided with drive ring seal circle (22) between medium side moving ring (21) and impeller shaft (101).

2. The double-ended mechanical seal of claim 1, wherein: the first step part (111) comprises a circumferential first step annular surface (1111) and an axial first step annular surface (1112), the circumferential first step annular surface (1111) is abutted against the pump cover (102) and forms an included angle smaller than or equal to 90 degrees with the axial first step annular surface (1112), and the main static ring seal ring (12) is abutted against the axial first step annular surface (1112) or the circumferential first step annular surface (1111); the static ring assembly (1) further comprises a gland seat (103), and the gland seat (103) is abutted to the second step part (112).

3. The double-ended mechanical seal of claim 2, wherein: the movable ring assembly (2) further comprises a shaft sleeve (23) and a spring seat (24), the shaft sleeve (23) is sleeved on the impeller shaft (101), one end of the shaft sleeve (23) is abutted against the driving ring sealing ring (22), the other end of the shaft sleeve (23) is fixedly connected with the impeller shaft (101) through a screw, the spring seat (24) is sleeved on the shaft sleeve (23) and is fixedly connected with the shaft sleeve (23), a spring in the spring seat (24) is abutted against one end, far away from the contact part (211), of the medium side movable ring (21), and the shaft sleeve (23) or the spring seat (24) drives the medium side movable ring (21) to rotate when rotating.

4. A double-ended mechanical seal according to claim 3, wherein: the spring seat (24) is provided with a transmission bulge (241), and the medium side moving ring (21) is provided with a transmission groove (242) matched with the transmission bulge (241).

5. A double-ended mechanical seal according to claim 3, wherein: the shaft sleeve (23) is provided with a pin groove (231), the medium side moving ring (21) is provided with a transmission groove (232), the pin groove (231) and the transmission groove (232) are internally provided with a transmission pin (233), the transmission pin (233) is provided with a butt joint part (2331), one face of the butt joint part (2331) is butt-jointed with the inner side wall of the transmission groove (232), and the other face of the butt joint part (2331) is butt-jointed with the outer annular surface (234) of the shaft sleeve (23).

6. A double-ended mechanical seal according to any one of claims 1-5, wherein: the utility model discloses a cleaning device, including contact portion (211), holding tank (4) has been seted up, be provided with clearance piece (41) and elastic sheet (42) in holding tank (4), elastic sheet (42) one end is fixed in holding tank (4) inside wall, the other end butt of elastic sheet (42) in clearance piece (41) forces clearance piece (41) towards medium side quiet ring (11) direction motion, clearance piece (41) are close to medium side quiet ring (11) direction has scraper (411), elastic sheet (42) force scraper (411) butt in medium side quiet ring (11).

7. A double-ended mechanical seal according to any one of claims 1-5, wherein: the cooling assembly (3) comprises a machine seal gland (104), a cooling cavity (38) is formed between the machine seal gland (104) and the medium side movable ring (21), a guide seat (39) is arranged in the cooling cavity, the machine seal gland (104) is provided with a cooling inlet (34) and a cooling outlet (35), the guide seat (39) divides the cooling cavity (38) into a first cavity (381) and a second cavity (382), the cooling inlet (34) is communicated with the first cavity (381), the first cavity (381) is communicated with the second cavity (382), and the second cavity (382) is communicated with the cooling outlet (35).

8. The double-ended mechanical seal of claim 7, wherein: the cooling inlet (34) and the cooling outlet (35) are respectively connected with a circulating cooling pipe (31), the circulating cooling pipe (31) is connected with a circulating device (32), the circulating device (32) is arranged on the impeller shaft (101), the impeller shaft (101) is connected with a gear ring (33), and the gear ring (33) is a driving piece of the circulating device (32).

9. The double-ended mechanical seal of claim 8, wherein: the cooling outlet (35) with the junction of circulation cooling tube (31) is provided with water filling port (36), water filling port (36) are plugged up by stopper (37), stopper (37) are fixed with filter ring (372), filter ring (372) keep away from one end of stopper (37) stretches into in cooling outlet (35).

10. A corrosion-resistant pump, characterized by: the corrosion-resistant pump is provided with the double-ended mechanical seal structure as claimed in any one of claims 1 to 9.

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