A comb guide mechanism to enhance mechanical seal protection circulation

Abstract

The utility model relates to mechanical seal flow guide mechanism technical field discloses a kind of comb tooth flow guide mechanism of enhanced mechanical seal protection circulation, including comb tooth flow guide ring, gland and shaft sleeve, gland is sleeved in the outer side surface of comb tooth flow guide ring, comb tooth flow guide ring is sleeved in the outer side surface of shaft sleeve, be provided with inclined slot on comb tooth flow guide ring, gland is provided with annular groove, and straight groove is equipped on the circumferential outer side surface of shaft sleeve.The utility model's inclined slot on comb tooth flow guide ring can effectively strengthen shaft sleeve rotating pumping effect, and enhance the circulating protection hydraulic head of mechanical seal protection circulation.In some small space, the circulating pumping structure that cannot be implemented other flow channel processing, using the utility model structure effect is better.

Description

Technical Field

[0001] This utility model relates to the technical field of mechanical seal flow guiding mechanism, specifically a comb-tooth flow guiding mechanism that enhances the protection circulation of mechanical seals. Background Technology

[0002] Mechanical seals are used to seal the rotating shaft of rotating equipment at the junction of the internal cavity and the external environment. In order to improve the stability and reliability of mechanical seals, two single-end face seals are usually used in series to form a double-end face mechanical seal, which can make the sealed medium achieve low leakage or zero leakage. Double-end face mechanical seals require the use of auxiliary systems for protection circulation to ensure that the mechanical seal end faces operate under appropriate temperature and pressure.

[0003] Mechanical seal auxiliary systems are usually independent protection circulation systems that are connected to the mechanical seal. The system circulation driving force usually comes from the mechanical seal itself, and the driving pressure is not large. There are often situations where the protection circulation system cannot circulate due to insufficient driving force, causing the mechanical seal to fail at high temperature because the frictional heat cannot be carried away in time.

[0004] To address the aforementioned issues, we propose a comb-tooth flow guiding mechanism that enhances the protection circulation of mechanical seals. Utility Model Content

[0005] The purpose of this invention is to provide a comb-tooth flow guiding mechanism that enhances the protection circulation of mechanical seals, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a comb-tooth flow guiding mechanism for enhancing the protection circulation of mechanical seals, comprising a comb-tooth flow guiding ring, a pressure cap, and a bushing; the pressure cap is sleeved on the outer side of the comb-tooth flow guiding ring; the comb-tooth flow guiding ring is sleeved on the outer side of the bushing; the comb-tooth flow guiding ring has an oblique groove; the pressure cap has an annular groove; and the bushing has a straight groove on its outer circumferential surface.

[0007] Preferably, the comb-tooth guide ring is provided with a plurality of oblique grooves evenly distributed along the circumference.

[0008] Preferably, the centerline of the oblique groove forms an angle with the tangent of the comb guide ring.

[0009] Preferably, the inclination direction of the oblique groove is in the same direction as the rotation direction of the bushing.

[0010] Preferably, the annular groove is connected to an external circulation device.

[0011] Preferably, the comb-tooth guide ring is made of heat-resistant steel.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The inclined groove on the comb-tooth guide ring can effectively enhance the pumping effect of the bushing rotation and strengthen the circulation protection hydraulic head of the mechanical seal protection circulation.

[0014] 2. In some confined spaces where other flow channel treatments are not feasible, the structure of this utility model is more effective. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the cross-section at point A;

[0017] Figure 3 This is a schematic diagram of the comb-tooth guide ring in this utility model.

[0018] In the figure: 1-First mechanical seal, 2-Second mechanical seal, 3-Comb-tooth guide ring, 31-Slanted groove, 4-Gland, 41-Annular groove, 5-Shaft sleeve, 51-Straight groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 , Figure 2 , Figure 3 This utility model provides a technical solution: a comb-tooth flow guiding mechanism for enhancing the protection circulation of a mechanical seal, comprising a comb-tooth flow guiding ring 3, a pressure cap 4, and a bushing 5. The comb-tooth flow guiding ring 3 has multiple oblique grooves 31 machined on it, an annular groove 41 machined at a corresponding position on the pressure cap 4, and a straight groove 51 machined on the corresponding outer circumferential surface of the bushing 5. The comb-tooth flow guiding mechanism of this utility model is located between the first mechanical seal 1 and the second mechanical seal 2.

[0021] Furthermore, the angle between the centerline of the oblique groove (31) and the tangent of the comb guide ring (3) is α; α is 45 degrees.

[0022] Furthermore, the inclination direction of the oblique groove (31) is in the same direction as the rotation direction of the bushing.

[0023] Furthermore, the annular groove (41) is connected to an external circulation device to facilitate the circulation of the protective liquid.

[0024] Furthermore, the comb-tooth guide ring (3) is made of heat-resistant steel. GX23CrMoV12-1 heat-resistant steel, after being air-cooled and quenched at 1040℃~1060℃ and tempered at 730℃~750℃, can meet the requirements of strength grade of 540MPa~740MPa, yield strength at 550℃ and ≥290MPa, while deformation is controlled by stress-relieving annealing after welding at 730℃. The tempered martensitic structure of heat-resistant steel has both strength and toughness at high temperatures, and is suitable for the manufacture of thin-walled ring castings (such as bushings and guide rings).

[0025] Working principle: When the bushing 5 rotates at high speed, the straight groove 51 on it drives the circulating protective fluid to rotate circumferentially. Under the action of the oblique groove 31 on the comb guide ring 3, more circulating protective fluid enters the annular groove 41 of the pressure cap 4, forming a certain pressure head, and flows out at the outlet on the annular groove 41, forming a protective circulation drive.

[0026] The oblique groove 31 on the comb-tooth guide ring 3 forms a 45-degree angle with the tangent at its location and is in the same direction as the rotation of the inner bushing 5. The comb-tooth structure is arranged in a circle, which is beneficial to the enhanced pumping effect driven by the rotation of the bushing 5.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A comb-tooth flow guiding mechanism for enhancing the protection circulation of a mechanical seal, wherein the comb-tooth flow guiding mechanism is disposed between a first mechanical seal (1) and a second mechanical seal (2), characterized in that, It includes a comb-tooth guide ring (3), a pressure cap (4), and a bushing (5); the pressure cap (4) is sleeved on the outer side of the comb-tooth guide ring (3); the comb-tooth guide ring (3) is sleeved on the outer side of the bushing (5); the comb-tooth guide ring (3) has a slanted groove (31); the pressure cap (4) has an annular groove (41); and the bushing (5) has a straight groove (51) on its outer circumference.

2. A comb guide mechanism to enhance mechanical seal protection cycling according to claim 1, wherein, The comb-tooth guide ring (3) is uniformly provided with multiple oblique grooves (31) along the circumference.

3. A comb guide mechanism to enhance mechanical seal protection cycling according to claim 2, wherein, The angle between the centerline of the oblique groove (31) and the tangent of the comb guide ring (3) is α; α is 45 degrees.

4. A comb guide mechanism to enhance mechanical seal protection cycling according to claim 3, wherein, The inclined direction of the oblique groove (31) is in the same direction as the rotation direction of the bushing.

5. The comb-tooth guide mechanism for enhancing mechanical seal protection circulation according to claim 1, characterized in that, The annular groove (41) is externally connected to an external circulation device.

6. A comb guide mechanism to enhance mechanical seal protection cycling according to claim 1, wherein, The comb-tooth guide ring (3) is made of heat-resistant steel.

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