CN221462953U - High-stability mechanical sealing element - Google Patents

Abstract

A high-stability mechanical seal comprises a stationary ring assembly and a dynamic ring assembly. The stationary ring assembly comprises a stationary ring seat, a static contact ring, a spring, and a first stationary ring sealing ring. The stationary ring seat comprises a stationary ring seat body and an oil hole. The static contact ring comprises a static contact ring seat and a static contact ring body. The dynamic ring assembly comprises a dynamic ring seat, a dynamic contact ring, a first dynamic ring sealing ring, and a second dynamic ring sealing ring. The dynamic ring seat comprises a dynamic ring seat body, a dynamic contact ring mounting groove, and a second sealing ring mounting groove. The dynamic contact ring comprises a dynamic contact ring body and a third sealing ring mounting groove. When the stationary ring assembly and the dynamic ring assembly are assembled together, the dynamic ring seat is accommodated in the stationary ring seat, and the oil hole corresponds to the gap between the static contact ring body and the dynamic contact ring body. The high-stability mechanical seal has a reasonable structure, is easy to install, has stable transmission, avoids interference, and improves the heat dissipation effect.

Description

A high stability mechanical seal

Technical Field

The utility model belongs to the technical field of mechanical seals, in particular to a high-stability mechanical seal.

Background technique

Mechanical seals are one of the basic mechanical components with high precision and complex structure, and are key components of various pumps, reaction reactors, turbine compressors, submersible motors and other equipment. Basic concept of mechanical seals: Mechanical seals refer to devices that prevent fluid leakage by maintaining contact and relative sliding of at least one pair of end faces perpendicular to the axis of rotation under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and the cooperation of auxiliary seals.

For example, the Chinese patent mechanical seal, application number CN201810230518.2, includes matching stationary ring assembly and dynamic ring assembly, the stationary ring assembly includes a stationary ring seat and a stationary ring; the dynamic ring assembly includes a coaxially arranged dynamic ring seat, a dynamic ring, a rubber bellows, a transmission card, a tightening ring, a spring and a transmission sleeve, the first stationary ring and the second stationary ring tend to move away from each other under the action of the compression spring, after assembly, the compression spring is always compressed, so the compression spring will always apply force to the first stationary ring and the second stationary ring so that the first stationary ring is always tightly pressed against the first moving ring, and the second stationary ring is always tightly pressed against the second moving ring, so that the end face of the moving ring and the end face of the static ring are kept in a fitting state, but in the process of shaft transmission, only the end face of the moving ring and the end face of the static ring are exposed to the outside, the end face of the moving ring and the end face of the static ring are easily disturbed, affecting the stability of the mechanical seal.

Utility Model Content

In view of this, the utility model provides a high-stability mechanical seal to meet industrial needs.

A high-stability mechanical seal includes a stationary ring assembly and a dynamic ring assembly arranged at one end of the stationary ring assembly. The stationary ring assembly includes a stationary ring seat, a static contact ring inserted in the stationary ring seat, at least two springs arranged between the stationary ring seat and the static contact ring, and a first stationary ring sealing ring arranged between the stationary ring seat and the static contact ring. The stationary ring seat includes a stationary ring seat body, two oil holes penetrated on the side wall of the stationary ring seat body, and the static contact ring includes a stationary contact ring seat and a static contact ring body arranged at one end of the stationary contact ring seat. The static contact ring body protrudes from one end of the static contact ring seat. The contact surface between the stationary ring seat and the static contact ring is stepped. The stationary ring seat and the static contact ring are clearance-matched. The first stationary ring sealing ring and the spring are arranged in the gap between the stationary ring seat and the static contact ring. The dynamic ring assembly includes a dynamic ring seat, a dynamic contact ring arranged on the dynamic ring seat, a first dynamic ring sealing ring arranged on the dynamic ring seat, and a second dynamic ring sealing ring arranged on the dynamic contact ring. The dynamic ring seat includes a dynamic ring seat body, a dynamic contact ring mounting groove arranged at one end of the dynamic ring seat body, and a second sealing ring mounting groove arranged in the dynamic contact ring mounting groove. The dynamic contact ring includes a dynamic contact ring body and a third sealing ring mounting groove arranged on the inner side wall of the dynamic contact ring body. The outer diameter of the dynamic ring seat is equal to the inner diameter of the stationary ring seat. The first dynamic ring sealing ring is accommodated in the second sealing ring mounting groove, and the second dynamic ring sealing ring is accommodated in the third sealing ring mounting groove. When the stationary ring assembly and the dynamic ring assembly are assembled together, the dynamic ring seat is accommodated in the stationary ring seat, the static contact ring body and the dynamic contact ring body abut against each other, and the oil hole corresponds to the gap between the static contact ring body and the dynamic contact ring body.

Furthermore, the stationary ring assembly also includes a second stationary ring sealing ring arranged at an end of the stationary ring seat facing away from the dynamic ring assembly.

Furthermore, the stationary ring seat also includes a first sealing ring installation groove arranged at an end of the stationary ring seat body facing away from the dynamic ring assembly.

Furthermore, when the stationary ring seat is fixedly disposed on the mounting member, a gap between the first sealing ring mounting groove and the mounting member is at least 2.8 mm.

Furthermore, in a cross section along the central axis of the static contact ring, the outer contour of the static contact ring is in an "L" shape.

Furthermore, the third sealing ring installation groove is arranged at the center of the inner side wall of the dynamic ring seat body.

Furthermore, the dynamic ring seat also includes at least one limiting pin arranged in the dynamic contact ring installation groove.

Furthermore, the dynamic contact ring further comprises at least one inserting groove arranged on the dynamic contact ring body, and the limiting pin is in the inserting groove.

Compared with the prior art, the high-stability mechanical seal provided by the utility model is inserted into the stationary ring seat of the stationary ring assembly through the dynamic ring assembly, so that the movement between the dynamic ring assembly and the stationary ring assembly is stable. A static contact ring is inserted into the stationary ring seat in the stationary ring assembly, a spring and a first stationary ring sealing ring are arranged between the stationary ring seat and the static contact ring, an oil hole is penetrated on the side wall of the stationary ring seat body, the dynamic ring assembly is provided with a dynamic contact ring at one end of the stationary contact ring seat, a first dynamic ring sealing ring is arranged on the dynamic ring seat, and a second dynamic ring sealing ring is arranged on the dynamic contact ring, the outer diameter of the dynamic ring seat is equal to the inner diameter of the stationary ring seat, and the outer diameter of the dynamic ring seat is inserted into the stationary ring seat, so that the position of the dynamic ring seat in the stationary ring assembly is stable. In addition, when the stationary ring assembly and the dynamic ring assembly are assembled together, the dynamic ring seat is accommodated in the stationary ring seat, the stationary contact ring body and the dynamic contact ring body abut against each other, the oil hole and the gap between the stationary contact ring body and the dynamic contact ring body correspond to each other, and the oil hole is used to transmit the heat dissipation oil to between the stationary contact ring and the dynamic ring assembly to achieve heat dissipation between the stationary ring assembly and the dynamic ring assembly. It can be seen from this that the high-stability mechanical seal has a reasonable structure, convenient installation, stable transmission, avoids interference, and improves the heat dissipation effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic cross-sectional view of the high-stability mechanical seal provided by the utility model.

Detailed ways

The following is a further detailed description of the specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

As shown in FIG1 , it is a schematic cross-sectional view of the high-stability mechanical seal provided by the utility model. The high-stability mechanical seal includes a stationary ring assembly 10 and a dynamic ring assembly 20 disposed at one end of the stationary ring assembly 10. The high-stability mechanical seal also includes some other functional modules, such as assembly components, etc., which should be well known to those skilled in the art and will not be described in detail here.

The stationary ring assembly 10 includes a stationary ring seat 11, a stationary contact ring 12 arranged on the stationary ring seat 11, at least two springs 13 arranged between the stationary ring seat 11 and the stationary contact ring 12, and a first stationary ring sealing ring 14 arranged between the stationary ring seat 11 and the stationary contact ring 12, and a second stationary ring sealing ring 15 arranged at one end of the stationary ring seat 11 facing away from the dynamic ring assembly 20.

The stationary ring seat 11 includes a stationary ring seat body 111, two oil holes 112 penetrating the side wall of the stationary ring seat body 111, and a first sealing ring installation groove 113 provided at one end of the stationary ring seat body 111 facing away from the dynamic ring assembly 20. The stationary ring seat body 111 is a tubular structure, and the oil hole 112 is used to transfer heat dissipation oil to between the stationary contact ring 12 and the dynamic ring assembly 20 described below to improve the heat dissipation effect. The oil hole 112 will be described in detail in conjunction with the dynamic ring assembly 20. The first sealing ring installation groove 113 is used to install the first stationary ring sealing ring 14, so that the first stationary ring sealing ring 14 is stable in the position of the stationary ring seat 11.

The static contact ring 12 includes a static contact ring seat 121 and a static contact ring body 122 disposed at one end of the static contact ring seat 121. The static contact ring seat 121 is installed together with the static ring seat 11, and the static contact ring body 122 protrudes from one end of the static contact ring seat 121 so that the static contact ring body 122 contacts the dynamic ring assembly 20, and the outer contour of the static contact ring 12 is in an "L" shape on the cross section along the central axis of the static contact ring 12. The contact surface between the static ring seat 11 and the static contact ring 12 is stepped, and the static ring seat 11 and the static contact ring 12 are gap-matched. The first static ring seal 14 and the spring 13 are disposed in the gap between the static ring seat 11 and the static contact ring 12.

The spring 13 is disposed between the stationary ring seat 11 and the stationary contact ring 12 . The stationary contact ring 12 is pushed against the dynamic ring assembly 20 by the elastic force of the spring 13 . The spring 13 is a prior art and will not be described in detail herein.

The first stationary ring seal 14 is disposed in the gap between the stationary ring seat 11 and the stationary contact ring 12 to seal one end of the gap between the stationary ring seat 11 and the stationary contact ring 12. When the oil hole 112 is used to transfer the heat dissipation oil to between the stationary contact ring 12 and the dynamic ring assembly 20, the heat dissipation oil can also flow into the gap between the stationary ring seat 11 and the stationary contact ring 12, so that the heat dissipation oil takes away the temperature of the stationary ring seat 11 and the stationary contact ring 12. The first stationary ring seal 14 blocks the heat dissipation oil from flowing out of the gap between the stationary ring seat 11 and the stationary contact ring 12. The first stationary ring seal 14 is a prior art and will not be described in detail here.

The second stationary ring sealing ring 15 is arranged at one end of the stationary ring seat 11 to improve the seal between the stationary ring seat 11 and the mounting part. When the stationary ring seat 11 is fixedly set on the mounting part, the gap between the first sealing ring mounting groove 113 and the mounting part is at least 2.8 mm to adapt to sealing rings of different specifications.

The dynamic ring assembly 20 includes a dynamic ring seat 21 , a dynamic contact ring 22 disposed at one end of the static contact ring seat 21 , a first dynamic ring sealing ring 23 disposed on the dynamic ring seat 21 , and a second dynamic ring sealing ring 24 disposed on the dynamic contact ring 22 .

The dynamic ring seat 21 includes a dynamic ring seat body 211, a dynamic contact ring mounting groove 212 disposed at one end of the dynamic ring seat body 211, a second sealing ring mounting groove 213 disposed in the dynamic contact ring mounting groove 212, and at least one stop pin 214 disposed in the dynamic contact ring mounting groove 212. The outer diameter of the dynamic ring seat 21 is equal to the inner diameter of the stationary ring seat 11, so that the dynamic ring seat 21 is stable in position in the stationary ring assembly 10.

The dynamic contact ring 22 includes a dynamic contact ring body 221, a third sealing ring installation groove 222 provided on the inner side wall of the dynamic contact ring body 221, and at least one plug-in groove 223 provided on the dynamic contact ring body 221. The dynamic contact ring body 22 is installed in the dynamic contact ring installation groove 212, so that the dynamic contact ring 22 is fixed in the dynamic ring seat 21. The stop pin 214 is inserted in the plug-in groove 223, so that the dynamic contact ring 22 is stable on the dynamic ring seat 21.

The first dynamic ring seal ring 23 is accommodated in the second seal ring installation groove 213, and the second dynamic ring seal ring 24 is accommodated in the third seal ring installation groove 222. The first dynamic ring seal ring 23 and the second dynamic ring seal ring 24 improve the sealing performance of the dynamic contact ring 22 on the dynamic ring seat 21.

The third sealing ring installation groove 222 is arranged at the center of the inner wall of the dynamic ring seat body 211, so that the second dynamic ring sealing ring 24 is also arranged at the center of the inner wall of the dynamic ring seat body 211 to ensure that the position of the second dynamic ring sealing ring 24 on the dynamic ring seat body 211 is stable.

When the stationary ring assembly 10 and the dynamic ring assembly 20 are assembled together, the dynamic ring seat 21 is accommodated in the stationary ring seat 11, the static contact ring body 121 and the dynamic contact ring body 221 abut against each other, the oil hole 112 and the gap between the static contact ring body 121 and the dynamic contact ring body 221 correspond to each other, and the oil hole 112 is used to transfer the heat dissipation oil to between the static contact ring 12 and the dynamic ring assembly 20 described below, so as to realize the heat dissipation between the stationary ring assembly 10 and the dynamic ring assembly 20.

Compared with the prior art, the high-stability mechanical seal provided by the utility model is inserted into the stationary ring seat 11 of the stationary ring assembly 10 through the dynamic ring assembly 20, so that the dynamic ring assembly 20 and the stationary ring assembly 10 can move stably. The stationary ring seat 11 in the stationary ring assembly 10 is inserted with a static contact ring 12, a spring 13 and a first stationary ring seal ring 14 are arranged between the stationary ring seat 11 and the static contact ring 12, the stationary ring seat 11 is provided with an oil hole 112 on the side wall of the stationary ring seat body 111, the dynamic ring assembly 20 is provided with a dynamic contact ring 22 at one end of the static contact ring seat 21, a first dynamic ring seal ring 23 is arranged on the dynamic ring seat 21, and a second dynamic ring seal ring 24 is arranged on the dynamic contact ring 22, the outer diameter of the dynamic ring seat 21 is equal to the inner diameter of the stationary ring seat 11, and the outer diameter of the dynamic ring seat 21 is inserted into the stationary ring seat 11, so that the dynamic ring seat 21 is stable in position in the stationary ring assembly 10. In addition, when the stationary ring assembly 10 and the dynamic ring assembly 20 are assembled together, the dynamic ring seat 21 is accommodated in the stationary ring seat 11, the stationary contact ring body 121 and the dynamic contact ring body 221 abut against each other, the oil hole 112 and the gap between the stationary contact ring body 121 and the dynamic contact ring body 221 correspond to each other, and the oil hole 112 is used to transmit the heat dissipation oil to between the stationary contact ring 12 and the dynamic ring assembly 20 described below, so as to achieve heat dissipation between the stationary ring assembly 10 and the dynamic ring assembly 20. It can be seen from this that the high-stability mechanical seal has a reasonable structure, convenient installation, stable transmission, avoids interference, and improves the heat dissipation effect.

The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims (8)

1. A high-stability mechanical seal, characterized in that: the high-stability mechanical seal comprises a stationary ring assembly and a dynamic ring assembly arranged at one end of the stationary ring assembly, the stationary ring assembly comprises a stationary ring seat, a static contact ring inserted in the stationary ring seat, at least two springs arranged between the stationary ring seat and the static contact ring, and a first stationary ring sealing ring arranged between the stationary ring seat and the static contact ring, the stationary ring seat comprises a stationary ring seat body, two oil holes penetrated on the side wall of the stationary ring seat body, the static contact ring comprises a stationary contact ring seat, and a static contact ring body arranged at one end of the stationary contact ring seat, the static contact ring body protrudes from one end of the static contact ring seat, the contact surface between the stationary ring seat and the static contact ring is stepped, the stationary ring seat and the static contact ring are gap-matched, the first stationary ring sealing ring and the spring are arranged in the gap between the stationary ring seat and the static contact ring, the dynamic ring assembly comprises a dynamic ring seat, a stationary ring seat, a stationary contact ring, a first stationary ring sealing ring and a spring are arranged in the gap between the stationary ring seat and the static contact ring, the dynamic ring assembly comprises a dynamic ring seat, a stationary ring seat, a stationary contact ring, a first stationary ring sealing ring and a spring are arranged in the gap between the stationary ring seat and the static contact ring, the dynamic ring assembly comprises a stationary ring seat, a stationary ring seat, a stationary contact ring, a first stationary ring sealing ring and a first stationary ring sealing ring ... A ring seat, a dynamic contact ring arranged on the dynamic ring seat, a first dynamic ring sealing ring arranged on the dynamic ring seat, and a second dynamic ring sealing ring arranged on the dynamic contact ring, the dynamic ring seat includes a dynamic ring seat body, a dynamic contact ring mounting groove arranged at one end of the dynamic ring seat body, and a second sealing ring mounting groove arranged in the dynamic contact ring mounting groove, the dynamic contact ring includes a dynamic contact ring body, a third sealing ring mounting groove arranged on the inner side wall of the dynamic contact ring body, the outer diameter of the dynamic ring seat is equal to the inner diameter of the stationary ring seat, the first dynamic ring sealing ring is accommodated in the second sealing ring mounting groove, and the second dynamic ring sealing ring is accommodated in the third sealing ring mounting groove, when the stationary ring assembly and the dynamic ring assembly are assembled together, the dynamic ring seat is accommodated in the stationary ring seat, the static contact ring body and the dynamic contact ring body abut against each other, and the oil hole corresponds to the gap between the static contact ring body and the dynamic contact ring body. 2. The high-stability mechanical seal according to claim 1 is characterized in that: the stationary ring assembly also includes a second stationary ring seal ring arranged at an end of the stationary ring seat facing away from the dynamic ring assembly. 3. The high-stability mechanical seal according to claim 1 is characterized in that: the stationary ring seat also includes a first sealing ring installation groove arranged at an end of the stationary ring seat body facing away from the dynamic ring assembly. 4. The high-stability mechanical seal as described in claim 3 is characterized in that when the stationary ring seat is fixedly arranged on the mounting member, the gap between the first sealing ring mounting groove and the mounting member is at least 2.8 mm. 5. The high-stability mechanical seal according to claim 1, characterized in that: in the cross section along the central axis of the static contact ring, the outer contour of the static contact ring is in an "L" shape. 6 . The high-stability mechanical seal according to claim 1 , wherein the third sealing ring installation groove is arranged at the center of the inner side wall of the dynamic ring seat body. 7. The high stability mechanical seal according to claim 1, characterized in that the dynamic ring seat further comprises at least one stop pin disposed in the dynamic contact ring mounting groove. 8. The high-stability mechanical seal according to claim 7, characterized in that: the dynamic contact ring further comprises at least one insertion groove arranged on the dynamic contact ring body, and the limit pin is in the insertion groove.