Moving ring sealing ring used in mechanical seal

Abstract

The utility model discloses a moving ring sealing ring used in mechanical sealing, which relates to the technical field of mechanical sealing, and comprises an outer sealing ring, an inner sealing ring and a plurality of counterweights, the inner circle of the outer sealing ring is provided with a circle of limiting groove, the width of the inner sealing ring is larger than that of the limiting groove, and the counterweights are arranged in the limiting groove. The outer diameter of the inner sealing ring is larger than the inner diameter of the outer sealing ring, the inner sealing ring is inserted into the limiting groove in an interference fit mode, the outer ring of the inner sealing ring abuts against the bottom of the limiting groove, the multiple counter weights are evenly arranged between the outer ring of the inner sealing ring and the bottom of the limiting groove, and the density of the counter weights is larger than that of the outer sealing ring. The counter weight is arranged between the outer sealing ring and the inner sealing ring, the density of the counter weight is larger than that of the outer sealing ring, and in the working process, the counter weight rotating along with the moving ring pushes the outer sealing ring outwards in the radial direction through centrifugal force, so that the pressure of the outer sealing ring on the moving ring installation base is increased, lubricating oil is prevented from leaking due to the centrifugal force, and the sealing performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical seal technical field, concretely is a dynamic ring sealing ring for mechanical seal. BACKGROUND

[0002] In the mechanical seal, the dynamic ring realizes static sealing cooperation with the dynamic ring mounting seat through the dynamic ring sealing ring (such as O ring) to prevent the lubricating oil in the sealing cavity from leaking to the outside along the axial direction, and a kind of mechanical seal device for pump can be referred to patent CN208010579U.

[0003] However, when pump body works, dynamic ring, rotating shaft and the like rotate at high speed, internal lubricating oil migrates to peripheral direction (i.e. dynamic ring mounting seat side wall) under the action of centrifugal force ((centrifugal force F=m⋅ω 2⋅r, ω is angular velocity, r is rotation radius)), and the greater the rotational speed and radius, the greater the impact pressure, therefore, the position between the outer ring of ring sealing ring and mounting seat is impacted most.O ring relies on initial compression amount to realize static sealing, but its radial contact pressure cannot be dynamically adjusted with centrifugal force, and in addition, dynamic ring friction in mechanical seal can generate heat, which can cause temperature to rise, possibly leading to O ring elastic performance to decline.When rotational speed increases, lubricating oil continuously impacts the contact interface between the outer ring of dynamic ring sealing ring and mounting seat under the drive of centrifugal force, and sealing ring can be deformed, therefore, it can lead to interface sealing pressure deficiency and lubricating oil leakage problem. SUMMARY

[0004] In view of the above shortcomings of prior art, the utility model provides a dynamic ring sealing ring for mechanical seal, counterweight is arranged between outer sealing ring and inner sealing ring, the density of counterweight is greater than the density of outer sealing ring, and under working condition, counterweight rotating with dynamic ring pushes and extrudes outer sealing ring radially and outward, so as to increase the pressure of outer sealing ring to dynamic ring mounting seat, avoid lubricating oil from leaking due to centrifugal force, and improve sealing performance.

[0005] To achieve the above object, the utility model is realized by the following technical scheme: a dynamic ring sealing ring for mechanical seal, comprising outer sealing ring, inner sealing ring and multiple counterweights, a circle of limit slot is formed in the inner ring of outer sealing ring, the width of inner sealing ring is greater than the width of limit slot, the outer diameter of inner sealing ring is greater than the inner diameter of outer sealing ring, inner sealing ring is inserted into limit slot in interference fit, and the outer ring of inner sealing ring abuts on the bottom of limit slot, multiple counterweights are evenly arranged between the outer ring of inner sealing ring and the bottom of limit slot, and the density of counterweight is greater than the density of outer sealing ring.

[0006] Preferably, the counterweight is cylindrical, the outer sealing ring is uniformly provided with a plurality of semi-cylindrical inner grooves corresponding to the positions of the bottom of the limiting groove, the outer ring of the inner sealing ring is provided with a plurality of semi-cylindrical outer grooves corresponding to the inner grooves, and the counterweight is arranged between the inner grooves and the outer grooves.

[0007] Preferably, the counterweight is fixedly connected with the bottom of the limiting groove of the outer sealing ring.

[0008] Preferably, the counterweight is made of steel wire.

[0009] The utility model provides a dynamic ring sealing ring for mechanical seal has the following beneficial effects:

[0010] 1. The utility model discloses between outer sealing ring and inner sealing ring sets up counterweight, and the density of counterweight is greater than the density of outer sealing ring, and when working, the centrifugal force of counterweight that follows dynamic ring rotation pushes outwards radially to outer sealing ring to thereby increase the pressure of outer sealing ring to dynamic ring mounting seat, and the greater centrifugal force, the greater pressure of outer sealing ring to dynamic ring mounting seat, avoids lubricating oil and leak because of centrifugal force, and promotes the leakproofness.

[0011] 2. The utility model discloses that the bottom of the limiting groove of outer sealing ring is provided with an inner groove, and the outer ring of the inner sealing ring is provided with an outer groove, and the counterweight is arranged between the inner groove and the outer groove, so that the counterweight cannot be randomly worn, and the rotation is more stable, and the force acting on the outer sealing ring is more uniform. ACCURACY OF DRAWINGS

[0012] Figure 1 It is a front view of the dynamic ring sealing ring for mechanical seal of the utility model;

[0013] Figure 2 It is a left view of the dynamic ring sealing ring for mechanical seal of the utility model;

[0014] Figure 3 It is the utility model Figure 2 The schematic diagram before installation of A place in the utility model.

[0015] In the drawing: 1, outer sealing ring; 2, inner sealing ring; 3, counterweight; 4, limiting groove; 5, inner groove; 6, outer groove. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0017] AsFigures 1-3 As shown, a dynamic ring sealing ring for mechanical seal, comprising an outer sealing ring 1, an inner sealing ring 2 and a plurality of counterweights 3, the inner ring of the outer sealing ring 1 is provided with a limiting groove 4, the width of the inner sealing ring 2 is greater than the width of the limiting groove 4, the outer diameter of the inner sealing ring 2 is greater than the inner diameter of the outer sealing ring 1, the inner sealing ring 2 is inserted into the limiting groove 4 in interference fit and the outer ring of the inner sealing ring 2 abuts the bottom of the limiting groove 4, a plurality of counterweights 3 are uniformly arranged between the outer ring of the inner sealing ring 2 and the bottom of the limiting groove 4, the density of the counterweight 3 is greater than the density of the outer sealing ring 1; the counterweight 3 is cylindrical, the outer sealing ring 1 is uniformly provided with a plurality of semicylindrical inner grooves 5 corresponding to the position of the bottom of the limiting groove 4, the outer ring of the inner sealing ring 2 is provided with a plurality of semicylindrical outer grooves 6 corresponding to the inner grooves 5, and the counterweight 3 is arranged between the inner grooves 5 and the outer grooves 6; the counterweight 3 is fixedly connected with the bottom of the limiting groove 4 of the outer sealing ring 1; the counterweight 3 is made of steel wire.

[0018] The detailed connection means is a known technology in the art, and the working principle and process are mainly introduced as follows:

[0019] According to the description attached Figures 1-3It can be known that the utility model for use, the outer sealing ring 1, the inner sealing ring 2 and multiple counterweights 3 are assembled in advance, multiple counterweights 3 are evenly arranged at the bottom of the limiting groove 4 of the outer sealing ring 1, the inner sealing ring 2 is interference fitted into the limiting groove 4, the two sides of the limiting groove 4 can seal the two sides of the inner sealing ring 2, so that the inner sealing ring 2 and the outer sealing ring 1 form a whole, the outer circle of the inner sealing ring 2 and the bottom of the limiting groove 4 of the outer sealing ring 1 extrude the counterweight 3, and the stability thereof is improved.The outer sealing ring 1 and the inner sealing ring 2 are arranged between the dynamic ring and the dynamic ring mounting seat in the mechanical seal, the utility model is mainly suitable for the prior art of blocking and sealing in the axial direction, and refers to the patent CN208010579U, a kind of mechanical seal device for pump, when installation, the outer circle of the outer sealing ring 1 is in abutment with the inner side wall of dynamic ring mounting seat, the inner circle of the inner sealing ring 2 is in abutment with the outer side wall of dynamic ring, to reach the effect of sealing.Working, the outer sealing ring 1 and the inner sealing ring 2 rotate with dynamic ring and dynamic ring mounting seat, of course, internal lubricating oil also rotates, centrifugal force is generated, impact is the most at the position where the outer sealing ring 1 and dynamic ring mounting seat contact, but since the density of counterweight 3 is greater than that of outer sealing ring 1, i.e., in the same volume, the mass of counterweight 3 is greater than that of outer sealing ring 1, in the same position and same speed, the centrifugal force of counterweight 3 is greater than that of outer sealing ring 1, so that counterweight 3 exerts radial outward force on outer sealing ring 1, and further makes outer sealing ring 1, in addition to its elasticity and centrifugal force, also has the force brought by centrifugal force of counterweight 3, the greater the speed, the greater the force, improve the sealing between outer sealing ring 1 and dynamic ring mounting seat, can resist the impact of lubricating oil on the position where outer sealing ring 1 and dynamic ring mounting seat contact, avoid lubricating oil from leaking due to centrifugal force, improve the sealing property.Here, through calculation and simulation experiment, the person skilled in the art can select suitable weight of counterweight 3.

[0020] Among them, counterweight 3 is cylindrical, outer sealing ring 1 is uniformly provided with multiple semicylindrical inner grooves 5 at the position corresponding to the bottom of limiting groove 4, the outer circle of inner sealing ring 2 is provided with multiple semicylindrical outer grooves 6 corresponding to inner groove 5, counterweight 3 is arranged between inner groove 5 and outer groove 6, to ensure that it does not run through, and is more stable when rotating, and the force on outer sealing ring 1 is more uniform.Of course, counterweight 3 can also be fixed at the bottom of limiting groove 4 of outer sealing ring 1, using piercing or sticking method.Counterweight 3 can adopt steel wire, has certain weight, and is convenient to install.

[0021] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A ring seal for use in a mechanical seal, characterized by, The sealing ring comprises an outer sealing ring (1), an inner sealing ring (2) and a plurality of counterweights (3), the inner ring of the outer sealing ring (1) is provided with a limiting groove (4), the width of the inner sealing ring (2) is greater than that of the limiting groove (4), the outer diameter of the inner sealing ring (2) is greater than the inner diameter of the outer sealing ring (1), the inner sealing ring (2) is inserted into the limiting groove (4) in an interference fit, and the outer ring of the inner sealing ring (2) abuts against the bottom of the limiting groove (4), the plurality of counterweights (3) are uniformly arranged between the outer ring of the inner sealing ring (2) and the bottom of the limiting groove (4), and the density of the counterweight (3) is greater than that of the outer sealing ring (1).

2. A dynamic ring seal ring for use in mechanical seals according to claim 1, characterized in that The counterweight (3) is in a cylindrical shape, the outer sealing ring (1) is uniformly provided with a plurality of semicylindrical inner grooves (5) corresponding to the position of the bottom of the limiting groove (4), the outer ring of the inner sealing ring (2) is provided with a plurality of semicylindrical outer grooves (6) corresponding to the inner grooves (5), and the counterweight (3) is arranged between the inner grooves (5) and the outer grooves (6).

3. A dynamic ring seal ring for use in mechanical seals according to claim 1, wherein, The counterweight (3) is fixedly connected with the bottom of the limiting groove (4) of the outer sealing ring (1).

4. A dynamic ring seal ring for use in mechanical seals according to claim 1, wherein, The counterweight (3) is made of steel wire.

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