CN214534491U

CN214534491U - Split mechanical seal

Info

Publication number: CN214534491U
Application number: CN202120172798.3U
Authority: CN
Inventors: 刘广栋; 苏浩; 刘娜娜; 严孝东; 邹杰; 崔东久
Original assignee: Qingdao Hangbao Electromechanical Equipment Co ltd
Current assignee: Qingdao Hangbao Electromechanical Equipment Co ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-10-29
Anticipated expiration: 2031-01-22

Abstract

The utility model discloses a divide half formula mechanical seal, including first machine gland, second machine gland and first locating hole, one side of first machine gland is provided with second machine gland, the inside one side of first machine gland is provided with first locating hole, the top of first machine gland opposite side is provided with drive mechanism, the upper end of first machine gland opposite side is provided with the spring holder. The shaft sleeve of the utility model adopts a split design, the two half components are respectively positioned by the first positioning pin and the second positioning pin, respectively locked by the first locking screw and the second locking screw, and respectively sealed by the first sealing gasket and the second sealing gasket, so that the overall processing precision requirement and the sealing performance of the combined body after the split structure combination are reliable, namely, the reasonable structure design, the combined body can be firmly combined and the form and position tolerance is reasonable, and the overall performance requirement of the mechanical seal is met; the first sealing gasket, the second sealing gasket and the O-shaped sealing ring are combined for application to ensure reliable sealing.

Description

Split mechanical seal

Technical Field

The utility model relates to a mechanical seal technical field specifically is half formula mechanical seal.

Background

The mechanical seal is a shaft seal device for rotary fluid machinery, and is used for equipment such as centrifugal pumps, centrifuges, reaction kettles and compressors, a circumferential gap exists between a shaft and an equipment cavity, and equipment media leak from the circumferential gap, so a leakage-stopping device is required to be arranged. Because of mechanical seal has the advantage such as leak few, longe-lived, has become main shaft seal mode, also called end face seal, and traditional mechanical seal comprises axle sleeve, seal ring subassembly, quiet ring seat, gland etc. still can have following problem in the use:

1. the pump shaft needs to be firstly disassembled during the current disassembly and assembly, and in some special occasions, the pump set is complex in structure, large in disassembly and assembly difficulty and long in period, the time cost for replacing and overhauling the mechanical seal is high, the maintenance cost is high, and the system benefit of the pump set is influenced.

2. When the semi-metal sealing ring is used, the structural design of each semi-part has defects, and the machining precision of the semi-metal component, the sealing performance after the semi-metal sealing ring is combined and the auxiliary sealing performance of the semi-metal component need to be improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a divide half formula mechanical seal to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a split mechanical seal comprises a first mechanical seal cover, a second mechanical seal cover and a first positioning hole, wherein the second mechanical seal cover is arranged on one side of the first mechanical seal cover, the first positioning hole is formed in one side inside the first mechanical seal cover, a transmission mechanism is arranged at the top end of the other side of the first mechanical seal cover, a spring seat is arranged at the upper end of the other side of the first mechanical seal cover, a stop pin is arranged at the bottom of the spring seat, an O-shaped seal ring is arranged on the other side inside the first mechanical seal cover, an auxiliary seal ring is arranged at the bottom of the O-shaped seal ring, a first positioning pin is arranged on the other side inside the first mechanical seal cover, a first seal gasket is arranged at the bottom of the other side inside the first mechanical seal cover, a positioning mechanism is arranged at the top end of one side of the second mechanical seal cover, and a spring strip is arranged on one side inside the second mechanical seal cover, the bottom side of bullet strip is provided with quiet ring, the bottom of quiet ring is provided with the rotating ring, the bottom of second machine gland one side is provided with the axle sleeve, the inside threaded connection of axle sleeve has first lock screw, the bottom of second machine gland one side is provided with the second locating hole, one side of second machine gland is provided with the sealed pad of second, second machine gland opposite side is provided with the second lock screw, the upper end and the bottom side of second lock screw all are provided with the second locating pin.

Preferably, the first positioning hole is connected with the second positioning pin, and the first positioning pin is connected with the second positioning hole.

Preferably, one side of the first sealing cover is provided with screw holes with the same number as the first locking screws and the second locking screws.

Preferably, one side of the first mechanical seal cover is provided with two groups of O-shaped sealing rings, and the bottom end of the other side of the second mechanical seal cover is provided with a groove matched with the O-shaped sealing rings.

Preferably, the shape of the second sealing gasket is 7-shaped, and a clamping groove matched with the second sealing gasket is formed in the second mechanical sealing cover.

Preferably, the inside of the second mechanical sealing cover is provided with a limiting groove matched with the elastic strip.

Preferably, the first mechanical seal cover, the second mechanical seal cover, the transmission mechanism, the auxiliary sealing ring and the shaft sleeve are designed in a split mode.

Compared with the prior art, the utility model provides a divide half formula mechanical seal, possess following beneficial effect:

1. the shaft sleeve of the utility model adopts a split design, the two half components are respectively positioned by the first positioning pin and the second positioning pin, respectively locked by the first locking screw and the second locking screw, and respectively sealed by the first sealing gasket and the second sealing gasket, so that the overall processing precision requirement and the sealing performance of the combined body after the split structure combination are reliable, namely, the reasonable structure design, the combined body can be firmly combined and the form and position tolerance is reasonable, and the overall performance requirement of the mechanical seal is met; the first sealing gasket, the second sealing gasket and the O-shaped sealing ring are combined for application to ensure reliable sealing.

2. The first machine seal gland and the second machine seal gland of the utility model adopt a split design, a first positioning pin and a second positioning pin are adopted between two half components for respectively positioning, a first locking screw and a second locking screw are respectively locked, and a first sealing gasket and a second sealing gasket are respectively sealed, so that the overall processing precision requirement and the sealing performance of the combined body after split structure combination are reliable, namely, the reasonable structure design is solved, the combined body can be firmly combined, the form and position tolerance is reasonable, and the overall performance requirement of the machine seal is met; the first sealing gasket, the second sealing gasket and the O-shaped sealing ring are combined for application to ensure reliable sealing.

3. The utility model discloses supplementary sealing washer divides half design, solves after supplementary sealing washer makes up into O type sealing washer, satisfies the mechanical seal requirement.

4. The utility model discloses drive mechanism divides half design, solves the whole machining precision of the assembly after dividing half formula structural grouping and satisfies the requirement, realizes reliable transmission, and reasonable structural design promptly ensures that the assembly can make up firmly, the geometric tolerances is reasonable, and overall structure intensity satisfies mechanical seal overall performance requirement.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is a top view of the present invention;

fig. 3 is a side view of the shaft sleeve of the present invention.

In the figure: 1. a first machine seal gland; 2. a second mechanical seal gland; 3. a first positioning hole; 4. a transmission mechanism; 5. a spring seat; 6. a retaining pin; 7. an O-shaped sealing ring; 8. an auxiliary seal ring; 9. a first positioning pin; 10. a first gasket; 11. a positioning mechanism; 12. a spring bar; 13. a stationary ring; 14. a moving ring; 15. a shaft sleeve; 16. a first locking screw; 17. a second positioning hole; 18. a second gasket; 19. a second locking screw; 20. and a second positioning pin.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides an embodiment: a split mechanical seal comprises a first mechanical seal cover 1 and a second mechanical seal cover 2, wherein one side of the first mechanical seal cover 1 is provided with the second mechanical seal cover 2, one side inside the first mechanical seal cover 1 is provided with a first positioning hole 3, the top end of the other side of the first mechanical seal cover 1 is provided with a transmission mechanism 4, the upper end of the other side of the first mechanical seal cover 1 is provided with a spring seat 5, the bottom of the spring seat 5 is provided with a stop pin 6, the other side inside the first mechanical seal cover 1 is provided with an O-shaped seal ring 7, the bottom of the O-shaped seal ring 7 is provided with an auxiliary seal ring 8, the other side inside the first mechanical seal cover 1 is provided with a first positioning pin 9, the bottom of the other side inside the first mechanical seal cover 1 is provided with a first seal gasket 10, the top end of one side of the second mechanical seal cover 2 is provided with a positioning mechanism 11, one side inside the second mechanical seal cover 2 is provided with a spring strip 12, the bottom side of bullet strip 12 is provided with quiet ring 13, the bottom of quiet ring 13 is provided with rotating ring 14, the bottom of second machine seal gland 2 one side is provided with axle sleeve 15, the inside threaded connection of axle sleeve 15 has first lock screw 16, the bottom of second machine seal gland 2 one side is provided with second locating hole 17, one side of second machine seal gland 2 is provided with the sealed 18 of second, second machine seal gland 2 opposite side is provided with second lock screw 19, the upper end and the bottom side of second lock screw 19 all are provided with second locating pin 20.

In this embodiment, the first positioning hole 3 is connected with the second positioning pin 20, and the first positioning pin 9 is connected with the second positioning hole 17, which helps to improve the tightness of the first mechanical seal cover 1 and the second mechanical seal cover 2.

In the present embodiment, the same number of screw holes as the first locking screws 16 and the second locking screws 19 are respectively provided on one side of the first machine seal cover 1, which contributes to improving the tightness of the first machine seal cover 1 and the second machine seal cover 2.

In this implementation, one side of the first mechanical seal cover 1 is provided with two sets of O-ring seals 7, and the bottom of the other side of the second mechanical seal cover 2 is provided with a groove matched with the O-ring seals 7, which is helpful for improving the sealing performance of the first mechanical seal cover 1 and the second mechanical seal cover 2.

In this embodiment, the second sealing gasket 18 is shaped like a letter "7", and a clamping groove matched with the second sealing gasket 18 is arranged in the second mechanical sealing cover 2, so as to meet the mechanical sealing requirement.

In this embodiment, the inside of the second mechanical seal cover 2 is provided with a limiting groove matched with the elastic strip 12, so that the stability of the elastic strip 12 is improved.

In this embodiment, the first mechanical seal cover 1, the second mechanical seal cover 2, the transmission mechanism 4, the auxiliary seal ring 8 and the shaft sleeve 15 are all designed in a split manner, so that the sealing performance of the first mechanical seal cover 1 and the second mechanical seal cover 2 is improved.

The working principle is as follows: the first machine seal gland 1, the second machine seal gland 2 and the shaft sleeve 15 are respectively connected with a second positioning hole 17 through a first positioning pin 9, the first positioning hole 3 is connected with a second positioning pin 20, a first locking screw 16 and a second locking screw 19 respectively lock one side of the first machine seal gland 1, and the first sealing gasket 10 and the second sealing gasket 18 are respectively sealed, and the auxiliary sealing ring 8 is combined into an O-shaped sealing ring 7.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims

1. Divide half formula mechanical seal, including first machine gland lid (1) and second machine gland lid (2), its characterized in that: a second machine sealing cover (2) is arranged on one side of the first machine sealing cover (1), a first positioning hole (3) is formed in one side of the inner portion of the first machine sealing cover (1), a transmission mechanism (4) is arranged on the top end of the other side of the first machine sealing cover (1), a spring seat (5) is arranged at the upper end of the other side of the first machine sealing cover (1), a stop pin (6) is arranged at the bottom of the spring seat (5), an O-shaped sealing ring (7) is arranged on the other side of the inner portion of the first machine sealing cover (1), an auxiliary sealing ring (8) is arranged at the bottom of the O-shaped sealing ring (7), a first positioning pin (9) is arranged on the other side of the inner portion of the first machine sealing cover (1), a first sealing gasket (10) is arranged at the bottom of the other side of the inner portion of the first machine sealing cover (1), and a positioning mechanism (11) is arranged on the top end of one side of the second machine sealing cover (2), the mechanical sealing device is characterized in that an elastic strip (12) is arranged on one side of the interior of the second mechanical sealing cover (2), a static ring (13) is arranged on the bottom side of the elastic strip (12), a movable ring (14) is arranged at the bottom end of the static ring (13), a shaft sleeve (15) is arranged at the bottom end of one side of the second mechanical sealing cover (2), a first locking screw (16) is connected to the inner thread of the shaft sleeve (15), a second positioning hole (17) is formed in the bottom of one side of the second mechanical sealing cover (2), a second sealing gasket (18) is arranged on one side of the second mechanical sealing cover (2), a second locking screw (19) is arranged on the other side of the second mechanical sealing cover (2), and a second positioning pin (20) is arranged on the upper end and the bottom side of the second locking screw (19).

2. The mechanical seal of claim 1, wherein: the first positioning hole (3) is connected with the second positioning pin (20), and the first positioning pin (9) is connected with the second positioning hole (17).

3. The mechanical seal of claim 1, wherein: one side of the first machine sealing cover (1) is provided with screw holes with the same number as the first locking screws (16) and the second locking screws (19).

4. The mechanical seal of claim 1, wherein: one side of the first mechanical seal gland (1) is provided with two groups of O-shaped sealing rings (7), and the bottom end of the other side of the second mechanical seal gland (2) is provided with a groove matched with the O-shaped sealing rings (7).

5. The mechanical seal of claim 1, wherein: the shape of the second sealing gasket (18) is 7-shaped, and a clamping groove matched with the second sealing gasket (18) is formed in the second mechanical sealing cover (2).

6. The mechanical seal of claim 1, wherein: and a limiting groove matched with the elastic strip (12) is arranged in the second mechanical seal pressing cover (2).

7. The mechanical seal of claim 1, wherein: the first mechanical seal gland (1), the second mechanical seal gland (2), the transmission mechanism (4), the auxiliary sealing ring (8) and the shaft sleeve (15) are all designed in a split mode.