阅读说明：本技术 一种中、低压活塞式机械密封装置 (Medium-low pressure piston type mechanical sealing device ) 是由 李太明 钟天伟 刘滔 于 2019-12-04 设计创作，主要内容包括：本发明涉及机械密封技术领域,且公开了一种中、低压活塞式机械密封装置,包括壳体,所述壳体的内部设有轴体,所述轴体的右侧在壳体的内部固定连接有摩擦环,所述摩擦环的上下两端在壳体内部设有滚轮,所述滚轮的一端在壳体的内壁上固定连接有支撑座,所述支撑座的底部的两端固定连接有轴承,所述轴体的中部设有活塞套,所述活塞套的内壁的形状为中部凸起的圆弧形,所述活塞套的内侧在轴体上开有三个环形凹槽。该发明通过油孔顶部的密封塞,壳体左端的密封盖和密封盖中部的密封圈配合密封圈上下两端的弹簧二,使设备的密封性能达到提高,通过壳体内部的夹紧环和夹紧环两端的弹簧一,使轴体的在运行过程更加稳定。(The invention relates to the technical field of mechanical sealing, and discloses a medium-low pressure piston type mechanical sealing device which comprises a shell, wherein a shaft body is arranged inside the shell, a friction ring is fixedly connected to the right side of the shaft body inside the shell, rollers are arranged at the upper end and the lower end of the friction ring inside the shell, one end of each roller is fixedly connected with a supporting seat on the inner wall of the shell, bearings are fixedly connected to the two ends of the bottom of each supporting seat, a piston sleeve is arranged in the middle of the shaft body, the inner wall of each piston sleeve is in the shape of a circular arc with a raised middle, and three annular grooves are formed in the shaft body on the inner side of each piston sleeve. According to the invention, the sealing performance of the equipment is improved by the sealing plug at the top of the oil hole, the sealing cover at the left end of the shell and the sealing ring in the middle of the sealing cover to be matched with the springs II at the upper end and the lower end of the sealing ring, and the operation process of the shaft body is more stable by the clamping ring in the shell and the springs I at the two ends of the clamping ring.)

1. The utility model provides a well, low pressure piston mechanical seal device, includes casing (1), the inside of casing (1) is equipped with axis body (2), its characterized in that: the right side of the shaft body (2) is fixedly connected with a friction ring (3) in the shell (1), the upper end and the lower end of the friction ring (3) are provided with rollers (4) in the shell (1), one end of each roller (4) is fixedly connected with a supporting seat (5) on the inner wall of the shell (1), two ends of the bottom of each supporting seat (8) are fixedly connected with bearings (7), the middle of the shaft body (2) is provided with a piston sleeve (9), the inner wall of each piston sleeve (9) is in the shape of a circular arc with a raised middle part, the inner side of each piston sleeve (9) is provided with three annular grooves on the shaft body (2), the piston sleeve (9) and two ends of the inner wall of the shaft body (2) are fixedly connected with rubber rings (10), the top of each piston sleeve (9) is provided with an oil hole (11), and the top of each oil hole (11) is spliced with, the oil hole (11) penetrates into the inner wall of the top of the shell (1), the oil hole (11) extends to the right end of the shell (1), the right end of the shell (1) is fixedly connected with a rotating sleeve (13), the oil hole (11) extends into the rotating sleeve (13), the right end of the shaft body (2) is provided with a cylindrical protrusion, the middle part of the cylindrical protrusion is provided with a circle of annular groove, the cylindrical protrusion at the right end of the shaft body (2) is movably connected with the rotating sleeve (13), the left side surface of the shaft body (2) is provided with a clamping ring (6), the surface of the clamping ring (6) is fixedly connected with a connecting block (14), the number of the connecting blocks (14) is six, one end of the connecting block (6) is provided with a groove in the inner wall of the shell (1), a first spring (15) is fixedly connected in the groove, and one end of the first spring (15) is fixedly, the inner wall opening of the groove is fixedly connected with a first rubber pad (16), the left side of the shell (1) is provided with a sealing cover (17), one end of the sealing cover (17) is fixedly connected with a second rubber pad (18), one end of the second rubber pad (18) is fixedly connected with a third rubber pad (19) at one end of the shell (1), the sealing cover (17) is fixedly connected with the shell (1) through four bolts (20) around the sealing cover, and a sealing ring (21) is arranged in the middle of the sealing cover (17).

2. A medium and low pressure piston machine seal as claimed in claim 1 in which: the shell (1) is made of aluminum alloy, and an anti-corrosion coating is arranged on the surface of the shell.

3. A medium and low pressure piston machine seal as claimed in claim 1 in which: the friction ring (3) is made of wear-resistant ceramic, the thickness of the friction ring (3) is 2mm, two arc-shaped grooves are formed in the friction ring (3), and the grooves surround the friction ring (3) for a whole circle.

4. A medium and low pressure piston machine seal as claimed in claim 1 in which: the idler wheels (4) are two, the idler wheels (4) are fixedly connected through a rotating shaft (5), and two ends of the rotating shaft (5) are movably connected with bearings (7) at two ends of the bottom of the supporting seat (8).

5. A medium and low pressure piston machine seal as claimed in claim 1 in which: the piston sleeve (9) is made of wear-resistant ceramic and is 3cm thick. The width is 8 cm.

6. A medium and low pressure piston machine seal as claimed in claim 1 in which: the rotating sleeve (13) is arranged on the right side of the inner wall of the shell (1) and does not penetrate through the shell (1).

7. A medium and low pressure piston machine seal as claimed in claim 1 in which: the clamping ring (6) is composed of two semicircular wear-resistant ceramic plates, rubber is filled in the ceramic plates, and the ceramic plates are fixedly connected through a silica gel pad.

8. A medium and low pressure piston machine seal as claimed in claim 1 in which: the sealing ring (21) is composed of two semicircular rubber rings, and the two rubber rings are fixedly connected with the sealing cover (17) through a second spring (22).

Technical Field

The invention relates to the technical field of mechanical sealing, in particular to a medium-pressure and low-pressure piston type mechanical sealing device.

Background

The mechanical seal (mechanical seal) is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to a rotation axis, and the end faces are kept in fit and relatively slide under the action of fluid pressure and the elasticity (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal, and the mechanical seal of which the elasticity loading mechanism and the auxiliary seal are metal bellows is called as a metal bellows seal. In light sealing, a rubber corrugated pipe is used as auxiliary sealing, the elasticity of the rubber corrugated pipe is limited, and a spring is generally required to be supplemented to meet the loading elasticity. The "mechanical seal" is generally referred to as "mechanical seal" for short, and is a shaft seal device of a rotating machine. Such as centrifugal pumps, centrifuges, reaction kettles, compressors, and the like. Since the drive shaft extends through the inside and outside of the apparatus, there is a circumferential gap between the shaft and the apparatus through which the medium in the apparatus leaks out, and if the pressure in the apparatus is lower than atmospheric pressure, air leaks into the apparatus, so that a shaft seal device must be provided to prevent leakage. The shaft seal has many kinds, and the mechanical seal has the advantages of small leakage amount, long service life and the like, so the mechanical seal is the most important shaft sealing mode in the devices in the world. Mechanical seals, also called face seals, are defined in the relevant national standards as follows: "means for preventing fluid leakage, which is composed of at least one pair of end faces perpendicular to the rotation axis, and which are kept in fit and relatively slide under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and the cooperation of the auxiliary seal.

The common device has poor sealing performance and poor stability, and influences the normal operation of equipment.

Disclosure of Invention

The invention aims to provide a medium-pressure and low-pressure piston type mechanical sealing device to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a middle-low pressure piston type mechanical sealing device comprises a shell, wherein a shaft body is arranged inside the shell, a friction ring is fixedly connected to the right side of the shaft body inside the shell, rollers are arranged at the upper end and the lower end of the friction ring inside the shell, one end of each roller is fixedly connected with a supporting seat on the inner wall of the shell, bearings are fixedly connected to two ends of the bottom of each supporting seat, a piston sleeve is arranged in the middle of the shaft body, the inner wall of the piston sleeve is in a shape of a circular arc with a raised middle part, three annular grooves are formed in the inner side of the piston sleeve on the shaft body, rubber rings are fixedly connected to two ends of the inner walls of the piston sleeve and the shaft body, an oil hole is formed in the top of the piston sleeve, a sealing plug is inserted into the top of the oil hole, the oil hole penetrates through the inner wall of the top of the shell, the, the oil hole extends to the inside of the rotating sleeve, the right end of the shaft body is provided with a cylindrical bulge, the middle part of the cylindrical bulge is provided with a circle of annular groove, a cylindrical bulge at the right end of the shaft body is movably connected with the rotating sleeve, a clamping ring is arranged on the left side surface of the shaft body, the surface of the clamping ring is fixedly connected with six connecting blocks, one end of each connecting block is provided with a groove on the inner wall of the shell, a first spring is fixedly connected in the groove, one end of the first spring is fixedly connected with the connecting block, the inner wall opening of the groove is fixedly connected with a first rubber pad, the left side of the shell is provided with a sealing cover, one end of the sealing cover is fixedly connected with a second rubber pad, one end of the rubber pad is fixedly connected with a third rubber pad at one end of the shell, the sealing cover is fixedly connected with the shell through four bolts on the periphery of the sealing cover, and a sealing ring is arranged in the middle of the sealing cover.

Preferably, the shell is made of aluminum alloy, and the surface of the shell is provided with an anti-corrosion coating.

Preferably, the friction ring is made of wear-resistant ceramic, the thickness of the friction ring is 2mm, two arc-shaped grooves are formed in the friction ring, and the grooves surround the friction ring for a whole circle.

Preferably, the number of the rollers is two, the two rollers are fixedly connected through a rotating shaft, and two ends of the rotating shaft are movably connected with the bearings at two ends of the bottom of the supporting seat.

Preferably, the piston sleeve is made of wear-resistant ceramic, and the thickness of the piston sleeve is 3 cm. The width is 8 cm.

Preferably, the rotating sleeve is sleeved on the right side of the inner wall of the shell and does not penetrate through the shell.

Preferably, the clamping ring consists of two semicircular wear-resistant ceramic plates, rubber is filled in the two ceramic plates, and the two ceramic plates are fixedly connected through a silica gel pad.

Preferably, the sealing ring is composed of two semicircular rubber rings, and the two rubber rings are fixedly connected with the sealing cover through a second spring.

The invention provides a medium-low pressure piston type mechanical sealing device. The method has the following beneficial effects:

(1) according to the invention, the sealing performance of the equipment is improved by the sealing plug 12 at the top of the oil hole 11, the sealing cover 17 at the left end of the shell 1 and the sealing ring 21 in the middle of the sealing cover matching with the second springs 22 at the upper end and the lower end of the sealing ring 21.

(2) According to the invention, the clamping ring 6 in the shell 1 and the springs 15 at two ends of the clamping ring 6 roll, the piston sleeve 9 in the middle of the shaft body 2 and the roller 4 at the right end of the shaft body 2 roll, so that the shaft body 2 is more stable in the operation process, and the purpose of stable operation of equipment is achieved.

(3) According to the invention, the cylindrical bulge at the right end of the shaft body 2 is movably connected with the rotating sleeve 13, so that the balance of the shaft body 2 is increased, and the purpose of stable operation is achieved.

(4) According to the invention, the sealing cover 17 is firmly fixed through the bolt 20, so that oil in the sealing cover does not overflow when the equipment works, and the stability of the equipment is further improved.

Drawings

FIG. 1 is a cross-sectional view in elevation of the present invention;

FIG. 2 is a block diagram of a side view of the clamp ring of the present invention;

FIG. 3 is a structural view in side elevation of the sealing lid of the present invention;

FIG. 4 is a side view of the piston sleeve 9 of the present invention;

FIG. 5 is a partial enlarged view of FIG. 1A;

FIG. 6 is a partial enlarged view of FIG. 1B;

fig. 7 is a partial enlarged view of fig. 1C.

In the figure: the device comprises a shell 1, a shaft body 2, a friction ring 3, rollers 4, a rotating shaft 5, a clamping ring 6, a bearing 7, a support seat 8, a piston sleeve 9, a rubber ring 10, an oil hole 11, a sealing plug 12, a rotating sleeve 13, a connecting block 14, a spring I15, a rubber gasket I16, a sealing cover 17, a rubber gasket II 18, a rubber gasket III 19, a bolt 20, a sealing ring 21 and a spring II 22.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1 to 7, the present invention provides a technical solution: a middle-low pressure piston type mechanical sealing device comprises a shell 1, wherein the shell 1 is made of aluminum alloy, and the surface of the shell is provided with an anti-corrosion coating, so that equipment cannot rust to cause the reduction of the precision of the device under the condition of being exposed to air for a long time and the use of the device is influenced, a shaft body 2 is arranged in the shell 1, a friction ring 3 is fixedly connected to the right side of the shaft body 2 in the shell 1, when the shaft body 2 rotates, a roller 4 rotates around a friction ring 3, the service life of the friction ring 3 is greatly prolonged due to the material of friction wear-resistant ceramic, so that the service life of the friction ring 2 is indirectly prolonged, the service life of the friction ring 3 is greatly prolonged due to the material of the friction wear-resistant ceramic, the service life of the shaft body 2 is indirectly prolonged, the thickness of the friction ring 3 is 2mm, and two arc-shaped grooves are arranged, and the grooves surround the friction ring, the upper and lower both ends of friction ring 3 are equipped with gyro wheel 4 in 1 inside of casing, gyro wheel 4 is equipped with two, two gyro wheels 4 are through 5 fixed connection of pivot, the both ends of pivot 5 and the bearing 7 swing joint at 8 bottom both ends of supporting seat, it is more stable when setting up two gyro wheels 4 and making 2 pivoted of axis body, the skew can not take place, improve the stability of device, fixedly connected with supporting seat 5 on casing 1's inner wall of the one end of gyro wheel 4, the both ends fixedly connected with bearing 7 of supporting seat 8's bottom, the middle part of axis body 2 is equipped with piston housing 9, the material of piston housing 9 is wear-resisting pottery, its thickness is 3 cm. The width is 8cm, the inner wall of the piston sleeve 9 is in the shape of a circular arc with a convex middle part, three annular grooves are formed in the inner side of the piston sleeve 9 on the shaft body 2, rubber rings 10 are fixedly connected to two ends of the inner walls of the piston sleeve 9 and the shaft body 2, an oil hole 11 is formed in the top of the piston sleeve 9, a sealing plug 12 is inserted into the top of the oil hole 11, the sealing plug 12 is arranged to prevent oil in the shell 1 from overflowing to affect the use of equipment, the sealing plug 12 at the top of the oil hole 11 is used, a sealing cover 17 at the left end of the shell 1 and a sealing ring 21 in the middle of the sealing cover are matched with two springs 22 at the upper end and the lower end of the sealing ring 21 to improve the sealing performance of the equipment, the oil hole 11 penetrates through the inner wall at the top of the shell 1, the oil hole 11 extends to the right end of the shell 1, a rotating sleeve 13 is fixedly, the right end of the shaft body 2 is provided with a cylindrical bulge and a cylindrical bulge, the middle part of the cylindrical bulge is provided with a circle of annular groove, when the shaft body 2 rotates, oil is filled with the annular groove, the friction force between the shaft body 2 and the rotating sleeve 13 is reduced, thereby the service life of the whole body is prolonged, the cylindrical bulge at the right end of the shaft body 2 is movably connected with the rotating sleeve 13, the balance of the shaft body 2 is increased, the purpose of stable operation is achieved, the left side surface of the shaft body 2 is provided with a clamping ring 6, a shaft body 2 is tightly fixed by the clamping ring 6 through a clamping ring 6 inside the shell 1 and springs one 15 at two ends of the clamping ring 6, thereby the shaft body 2 can not deviate when rotating, the stability of the equipment is improved, a piston sleeve 9 at the middle part of the shaft body 2 and an, thereby achieving the purpose of stable operation of the equipment, the clamping ring 6 is composed of two semicircular wear-resistant ceramic plates, rubber is filled in the two ceramic plates, the two ceramic plates are fixedly connected through a silica gel pad, the gap between the shaft body 2 and the clamping ring 6 is smaller by the centrifugal force generated when the shaft body 2 rotates, the sealing performance is improved, the stable operation of the device is achieved, the surface of the clamping ring 6 is fixedly connected with a connecting block 14, the connecting block 14 is provided with six, one end of the connecting block 14 is provided with a groove on the inner wall of the shell 1, a first spring 15 is fixedly connected in the groove, one end of the first spring 15 is fixedly connected with the connecting block 14, the inner wall opening of the groove is fixedly connected with a first rubber pad 16, the left side of the shell 1 is provided with a sealing cover 17, one end of the sealing cover 17 is fixedly connected with, one end of the second rubber pad 18 is fixedly connected with a third rubber pad 19 at one end of the shell 1, the sealing cover 17 is fixedly connected with the shell 1 through four bolts 20 around the sealing cover 17, the sealing cover 17 is firmly fixed through the bolts 20, and when the equipment works, the inside oil cannot overflow, so that the stability of the equipment is further improved, the middle part of the sealing cover 17 is provided with a sealing ring 21, the sealing ring 21 is composed of two semicircular rubber rings, and the two rubber rings are fixedly connected with the sealing cover 17 through a second spring 22.

The working principle is as follows: in the middle of, when low pressure piston mechanical seal device used, the sealing plug 12 at 11 tops of oilhole, the sealed lid 17 at the 1 left end of casing and the sealing washer 21 at sealed lid middle part cooperate the spring two 22 at both ends about the sealing washer 21, make the sealing performance of equipment reach the improvement, the clamp ring 6 of casing 1 inside and the spring one 15 at the 6 both ends of clamp ring, the piston bush 9 at 2 middle parts of axis body and the gyro wheel 4 roll of 2 right-hand members of axis body, make 2 more stable at the operation process of axis body, thereby reach the steady operation's of equipment purpose, the cylinder arch and the rotation cover 13 swing joint of 2 right-hand members of axis body, make the equilibrium of axis body 2 increase, reach the steady operation's purpose, bolt 20 is firmly fixed with sealed lid 17, make equipment during operation, inside fluid can not spill over, thereby further.

In conclusion, the sealing performance of the device is improved by the sealing plug 12 at the top of the oil hole 11, the sealing cover 17 at the left end of the shell 1 and the sealing ring 21 in the middle of the sealing cover matching with the springs II (22) at the upper end and the lower end of the sealing ring 21, and the piston sleeve 9 in the middle of the shaft body 2 and the roller 4 at the right end of the shaft body 2 roll by the clamping ring 6 in the shell 1 and the springs I15 at the two ends of the clamping ring 6, so that the running process of the shaft body 2 is more stable, and the purpose of stable running of the device is.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.