CN217301539U

CN217301539U - Vacuum pump with fluid dynamic pressure spiral groove sealing surface mechanical seal

Info

Publication number: CN217301539U
Application number: CN202122990183.4U
Authority: CN
Inventors: 胡滨
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-08-26
Anticipated expiration: 2031-12-01

Abstract

A vacuum pump with a mechanical seal for a sealing surface of a fluid dynamic pressure spiral groove comprises a gear oil tank and a lubricating oil tank cavity, wherein a rotor shaft of the vacuum pump is positioned by a front bearing and a rear bearing between a front gear oil tank and a rear lubricating oil tank, a static ring is installed in the gear oil tank and the lubricating oil tank cavity by a static ring seat, a gap between the static ring seat and a gear box and a lubricating oil tank is sealed by a rubber O-shaped ring I, a rubber O-shaped ring and a rubber O-shaped ring II, and a movable ring part consisting of a movable ring, a push ring, a butterfly spring and a spring seat is installed on the rotor shaft of the vacuum pump and is closely positioned and fixed by the bearings, so that the problem that the mechanical pump works continuously for a long time and the lubricating oil in the gear box and the oil tank is easy to generate high temperature to cause seal failure due to no cooling circulation is solved.

Description

Vacuum pump with fluid dynamic pressure spiral groove sealing surface mechanical seal

Technical Field

The utility model relates to a gear box and the sealed technical field of oil tank bearing end of vacuum pump, fan, compressor specifically are vacuum pump with sealed face mechanical seal of fluid dynamic pressure helicla flute.

Background

The gear boxes and oil tanks of the vacuum pump, the fan and the compressor in the prior art are sealed by oil, friction heating is generated by adopting the traditional mechanical seal for a long time, and the oil tank is burnt out and fails, so that only the framework seal can be adopted, but the sealing mode has the defects of short service life and high maintenance cost and has certain limitation, and therefore, the vacuum pump with the fluid dynamic pressure spiral groove sealing surface mechanical seal is provided.

Disclosure of Invention

1. The technical problem to be solved.

To the problems existing in the prior art, the utility model aims to provide an application such as vacuum pump with fluid dynamic pressure spiral groove sealing face mechanical seal, it is through setting up a set of logarithm spiral groove the same with the axle direction of rotation, can produce the pump effect, go into the oil pump and produce the liquid membrane in the sealing face, make mechanical seal face rub in the liquid state entirely, thereby prevented dry friction and heated up, burn out rubber O shape circle and make mechanical seal inefficacy, and then can guarantee the life and the result of use of this mechanical seal, long service life, and the cost of maintenance is lower; the matching surface of the movable ring and the tetrafluoro wedge-shaped auxiliary sealing ring adopts a wedge-shaped structure, so that the leakage of the groove-shaped structure due to the deformation of the auxiliary sealing ring can be avoided, the actual sealing effect can be further ensured, the actual using effect can be ensured, and the stability is good; the problem of machinery long-time continuous operation, lubricating oil does not have cooling cycle in gear box and the oil tank and produces high temperature easily and lead to sealed inefficacy is solved.

2. Technical scheme

In order to solve the above problem, the utility model adopts the following technical scheme:

a vacuum pump with mechanical sealing of a sealing surface of a fluid dynamic pressure spiral groove comprises a vacuum pump rotor shaft, a spring seat, a butterfly spring, a push ring, a tetrafluoro wedge-shaped auxiliary sealing ring, a movable ring, a static ring, a rubber O-shaped ring I, a rubber O-shaped ring, a static ring seat, a rubber O-shaped ring II, a gear oil tank, a lubricating oil tank cavity and a bearing, wherein the vacuum pump rotor shaft is arranged between the front end gear oil tank and the rear end lubricating oil tank cavity, the static ring is installed in the gear oil tank and the lubricating oil tank cavity through the static ring seat, a gap between the static ring seat and the gear tank and between the static ring seat and the lubricating oil tank is sealed by the rubber O-shaped ring I, the rubber O-shaped ring and the rubber O-shaped ring II, the movable ring and the push ring, the butterfly spring and the spring seat form a movable ring part which is installed on the vacuum pump rotor shaft and is closely positioned and fixed by the bearing, the movable ring and the spring seat are in matched transmission by an R groove, and the tetrafluoro wedge-shaped auxiliary sealing ring and the vacuum pump rotor shaft are sealed, the dynamic ring is tightly attached to the static ring under the action of a spring force and rotates at a relatively high speed to form a mechanical sealing element, and a group of logarithmic spiral grooves in the same direction as the rotation direction of the shaft are machined on the sealing surface of the dynamic ring or the static ring.

As an optimized proposal of the utility model, the sealing surface of the dynamic ring or the static ring is provided with a group of logarithmic spiral grooves with fluid dynamic pressure effect.

As an optimized proposal of the utility model, the matching surface of the movable ring and the tetrafluoro wedge-shaped auxiliary sealing ring adopts a wedge-shaped structure.

As an optimized proposal of the utility model, the inside of the static ring seat is provided with a water channel.

As an optimal scheme of the utility model, spring holder, butterfly spring, throw-out collar, auxiliary seal circle, rotating ring, quiet ring, rubber O shape circle one, rubber O shape circle, quiet ring seat and rubber O shape circle two set up at the gear oil tank of vacuum pump rotor shaft front end and the bearing and the cavity end seal department of rear end lubricating-oil tank.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

(1) processing has a set of logarithmic spiral wire casing the same with axle direction of rotation on this scheme rotating ring or the quiet sealed face of ring, through setting up a set of logarithmic spiral wire casing the same with axle direction of rotation, can produce the pump effect, go into the oil pump and produce liquid membrane in the sealing face, make mechanical seal face rub in the liquid state entirely, thereby prevented dry friction and risen temperature, burn out rubber O shape circle and make mechanical seal inefficacy, and then can guarantee this mechanical seal's life and result of use, long service life, and the cost of maintenance is lower.

(2) The matching surface of this scheme rotating ring and tetrafluoro wedge auxiliary seal circle adopts the wedge structure, can avoid groove-shaped structure to leak because auxiliary seal circle produces the deformation through this kind of setting to can further guarantee the sealed effect of reality, and the steadiness can be good, be difficult for taking place deformation, cost of maintenance is low.

(3) The mechanical long-time continuous operation is solved to this scheme, and lubricating oil does not have the cooling cycle in gear box and the oil tank and produces the problem that high temperature leads to sealed inefficacy easily, long service life, and low in use cost, and simple structure, preparation simple process, the facilitate promotion utilizes, and the practicality is extremely strong.

Drawings

Fig. 1 is a structural diagram of the mechanical sealing element of the present invention.

Fig. 2 is the installation schematic diagram of the mechanical sealing element in the vacuum pump of the present invention.

Fig. 3 is the structure diagram of the logarithmic spiral groove formed on the sealing surface of the moving ring or the stationary ring of the present invention.

The reference numbers in the figures illustrate:

1. a vacuum pump rotor shaft; 2. a spring seat; 3. a butterfly leaf spring; 4. a push ring; 5. a tetrafluoro wedge-shaped auxiliary sealing ring; 6. a moving ring; 7. a stationary ring; 8. a rubber O-shaped ring I; 9. a rubber O-ring; 10. a stationary ring seat; 11. a rubber O-shaped ring II; 12. a gear oil tank and a lubricating oil tank cavity; 13. and a bearing.

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. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," 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 should be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like, are to be interpreted broadly, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment is as follows:

referring to fig. 1-3, a vacuum pump with mechanical seal for fluid dynamic pressure spiral groove sealing surface comprises a vacuum pump rotor shaft 1, a spring seat 2, a butterfly spring 3, a push ring 4, a tetrafluoro wedge-shaped auxiliary seal ring 5, a movable ring 6, a stationary ring 7, a rubber O-ring 8, a rubber O-ring 9, a stationary ring seat 10, a rubber O-ring 11, a gear oil tank and lubricant oil tank cavity 12 and a bearing 13, wherein the vacuum pump rotor shaft 1 is arranged between the gear oil tank and the lubricant oil tank cavity 12, the stationary ring 7 is arranged in the gear oil tank and lubricant oil tank cavity 12 by the stationary ring seat 10, a gap between the stationary ring seat 10 and the gear oil tank and the lubricant oil tank is sealed by the rubber O-ring 8, the rubber O-ring 9 and the rubber O-ring 11, the movable ring 6, the push ring 4, the butterfly spring 3 and the spring seat 2 form a movable ring part which is arranged on the vacuum pump rotor 1 and is closely positioned and fixed by the bearing 13, and the movable ring 6 and the spring seat 2 are in matched transmission through an R groove, the auxiliary sealing ring 5 is sealed with the vacuum pump rotor shaft 1, the movable ring 6 is tightly attached to the static ring 7 through the action of a spring force and rotates at a relatively high speed to form a mechanical sealing element, and a group of logarithmic spiral grooves in the same direction as the rotation direction of the shaft are processed on the sealing surface of the movable ring 6 or the static ring 7.

In the embodiment, by arranging the spring seat 2, the butterfly spring 3, the push ring 4 and the tetrafluoro wedge-shaped auxiliary seal ring 5, the movable ring part consisting of the movable ring 6 is positioned, fixed and installed by a bearing, and has good stability and good use effect, the movable ring 6 is tightly attached to the static ring 7 under the action of spring force and rotates at a relatively high speed to form a mechanical seal element, the reliability of the static ring 7 can be ensured by arranging the static ring seat 10, the rubber O-shaped ring 8 and the rubber O-shaped ring 9, the tightness of the movable ring 6 and the static ring 7 can be ensured under the matching of the spring seat 2 and the static ring seat 10, so that the movable ring 6 and the static ring 7 are not easy to slip or lose efficacy, the practicability is extremely strong, a group of logarithmic spiral grooves in the same axial rotation direction are processed on the sealing surface of the movable ring 6 or the static ring 7, a group of logarithmic spiral grooves in the same axial rotation direction are arranged, a pump effect can be generated, a liquid film is generated in the oil pump to enable the mechanical sealing surface to rub in a full liquid state, therefore, dry friction heating is prevented, the rubber O-shaped ring is burnt out, the mechanical seal fails, the service life and the use effect of the mechanical seal can be further ensured, the service life is long, and the maintenance cost is low.

Specifically, a dynamic fluid pressure spiral groove which is consistent with the rotation direction of the rotor shaft is machined on the dynamic ring or the static ring seal.

In this embodiment, tetrafluoro wedge circle has high temperature resistant, low temperature resistant, corrosion-resistant, weather resistant, high lubrication and the advantage of non-adhesion, and sealed effect is good, and performance is good, and the practicality is strong.

Specifically, the matching surface of the movable ring 6 and the auxiliary sealing ring 5 adopts a wedge-shaped structure.

In this embodiment, can avoid groove-shaped structure to leak because auxiliary seal ring 5 produces the deformation through this kind of setting to can further guarantee the sealed effect of reality, thereby can guarantee the in-service use effect, and the steadiness can be good, difficult emergence deformation, cost of maintenance is low.

Specifically, a water channel is formed inside the stationary ring seat 10.

In this embodiment, can realize the used circulation of cooling water through setting up the water course to can realize the heat dissipation cooling effect of internals, and then can guarantee actual result of use, the effect of work is good.

Specifically, a spring seat 2, a butterfly spring 3, a push ring 4, a tetrafluoro wedge-shaped auxiliary sealing ring 5, a movable ring 6, a static ring 7, a rubber O-shaped ring I8, a rubber O-shaped ring 9, a static ring seat 10 and a rubber O-shaped ring II 11 are respectively arranged at the sealing positions of bearings and cavities of a gear oil tank at the front end and a lubricating oil tank at the rear end of a vacuum pump rotor.

In this embodiment, through setting up spring holder 2, butterfly leaf spring 3, the installation steadiness of rotating ring 6 can be guaranteed to throw-out collar 4 and tetrafluoro wedge auxiliary seal circle 5, rotating ring 6 and throw-out collar 4, butterfly leaf spring 3, the rotating ring part is installed at epaxial by bearing 13 near the location to spring holder 2 constitution rotating ring part, through setting up rubber O shape circle one 8, rubber O shape circle 9, quiet ring seat 10 and second 11 of the rubber O shape circle can guarantee the installation leakproofness of quiet ring 7, quiet ring 7 is installed by quiet ring seat 10 and is sealed by rubber O shape circle one 8 and rubber O shape circle 9 in gear oil tank and lubricating-oil tank cavity, thereby can guarantee actual result of use, therefore, the clothes hanger is strong in practicability.

The working principle is as follows: a vacuum pump rotor shaft 1 is arranged between a front end gear oil tank and a rear end lubricating oil tank cavity 12, a static ring 7 is arranged in the gear oil tank and lubricating oil tank cavity 12 through a static ring seat 10, a gap between the static ring seat 10 and the gear box and lubricating oil tank is sealed by a rubber O-shaped ring I8, a rubber O-shaped ring 9 and a rubber O-shaped ring II 11, a water channel is arranged in the static ring seat 10, and cooling water can be recycled through the water channel, so that the heat dissipation and cooling effects of internal parts can be realized, and the actual using effect can be ensured, a movable ring part consisting of a movable ring 6, a push ring 4, a butterfly spring 3 and a spring seat 2 is arranged on the vacuum pump rotor shaft 1 and is positioned and fixed by a front pair of bearings 13 and a rear pair of bearings 13, the working effect is good, the movable ring 6 and the spring seat 2 are in matched transmission through an R groove, an auxiliary sealing ring 5 is sealed with the vacuum pump rotor shaft 1, the auxiliary sealing ring 5 adopts a tetrafluoro wedge ring, the PTFE wedge ring has the advantages of high temperature resistance, low temperature resistance, corrosion resistance, weather resistance, high lubrication and non-adhesion, the sealing effect is good, the matching surface of the movable ring 6 and the auxiliary sealing ring 5 adopts a wedge structure, the leakage of the groove structure caused by the deformation of the auxiliary sealing ring 5 can be avoided through the arrangement, the actual sealing effect can be further ensured, the actual using effect can be ensured, the stability is good, the deformation is not easy to occur, the movable ring 6 is tightly adhered to the static ring 7 through the action of the butterfly spring 3 and rotates at a relatively high speed to form a mechanical sealing element, a group of logarithmic spiral wire grooves in the same direction as the shaft rotation direction are processed on the sealing surface of the movable ring 6 or the static ring 7, the pump effect can be generated through the group of logarithmic spiral wire grooves in the same direction as the shaft rotation direction, the gear oil is pumped into the sealing surface to generate a liquid film, and the mechanical sealing surface is rubbed in a full liquid state, therefore, dry friction heating is prevented, the rubber O-shaped ring is burnt out, the mechanical seal fails, the service life and the use effect of the mechanical seal can be further ensured, the service life is long, and the maintenance cost is low.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the modified concept of the present invention within the technical scope disclosed in the present invention.

Claims

1. Vacuum pump with sealed face mechanical seal of fluid dynamic pressure helicla flute, including vacuum pump rotor shaft (1), spring holder (2), butterfly leaf spring (3), throw-out collar (4), tetrafluoro wedge auxiliary seal circle (5), rotating ring (6), quiet ring (7), rubber O shape circle (8), rubber O shape circle (9), quiet ring seat (10), rubber O shape circle two (11), gear oil tank and lubricating-oil tank cavity (12) and bearing (13), its characterized in that: a vacuum pump rotor shaft (1) is arranged between the gear oil tank and the lubricating oil tank cavity (12), the static ring (7) is installed in the gear oil tank and the lubricating oil tank cavity (12) through a static ring seat (10), a gap between the static ring seat (10) and the gear oil tank and the lubricating oil tank is sealed by a rubber O-shaped ring I (8), a rubber O-shaped ring (9) and a rubber O-shaped ring II (11), the dynamic ring (6), the push ring (4), the butterfly spring (3) and the spring seat (2) form a dynamic ring part which is installed on the vacuum pump rotor shaft (1) and is tightly fixed by a bearing (13), the dynamic ring (6) and the spring seat (2) are in matched transmission through an R groove, the tetrafluoro wedge-shaped auxiliary sealing ring (5) is sealed with the vacuum pump rotor shaft (1), and the dynamic ring (6) is tightly attached to the static ring (7) through the action of a spring force and rotates at a relatively high speed to form a mechanical sealing element, and a group of logarithmic spiral grooves in the same direction as the rotation direction of the shaft are processed on the sealing surface of the movable ring (6) or the static ring (7).

2. A vacuum pump having a hydrodynamic spiral groove seal face mechanical seal according to claim 1, wherein: and a logarithmic spiral groove with a group of fluid dynamic pressure effects is processed on the sealing surface of the dynamic ring or the static ring.

3. A vacuum pump having a hydrodynamic spiral groove seal face mechanical seal according to claim 1, wherein: the matching surface of the movable ring (6) and the tetrafluoro wedge-shaped auxiliary sealing ring (5) adopts a wedge-shaped structure.

4. A vacuum pump having a hydrodynamic spiral groove sealing face mechanical seal according to claim 1, wherein: a water channel is formed in the static ring seat (10).

5. A vacuum pump having a hydrodynamic spiral groove sealing face mechanical seal according to claim 1, wherein: the vacuum pump rotor shaft is characterized in that the spring seat (2), the butterfly leaf spring (3), the push ring (4), the tetrafluoro wedge-shaped auxiliary sealing ring (5), the movable ring (6), the static ring (7), the rubber O-shaped ring I (8), the rubber O-shaped ring (9), the static ring seat (10) and the rubber O-shaped ring II (11) are arranged in a gear oil tank at the front end of the vacuum pump rotor shaft and a lubricating oil tank at the rear end of the vacuum pump rotor shaft.