Single-end-face packaging type mechanical seal

Abstract

The utility model provides a single-end-face packaging type mechanical seal, which belongs to the technical field of mechanical seals, and comprises a shaft sleeve, a movable ring is sleeved on the shaft sleeve, the movable ring is axially and fixedly connected with the shaft sleeve, and the movable ring is arranged to be positioned on a medium side; the protective ring sleeves the moving ring, and the inner circumferential surface of the protective ring is connected with the outer circumferential surface of the moving ring in an abutting manner, so that an anti-impact protective layer is formed on the outer circumferential surface of the moving ring; and the shaft sleeve is sleeved with the sealing disc, the sealing disc is provided with a static ring, and the static ring and the moving ring are attached to form a sealing face. The utility model has the beneficial effects that the protective ring is sleeved on the periphery of the moving ring, so that the direct impact of particles on the moving ring is reduced, the impact resistance of the moving ring is greatly improved, and the possibility of sealing failure caused by the impact of the moving ring is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical seals and relates to a single-end face assembled mechanical seal. Background Art

[0002] A mechanical seal is a device used to prevent fluid or gas leakage. It is mainly used in rotating equipment such as pumps, compressors, agitators, etc. A mechanical seal consists of two main parts: a stationary ring (mounted on the equipment housing) and a rotating ring (rotating with the shaft). These two rings are in close contact and form a sealing surface.

[0003] In the prior art, in the design of mechanical seals, the rotating ring is usually placed on the medium side, directly exposed to the working fluid and the sand and other particulate matters that may exist therein. This arrangement easily causes the rotating ring to be impacted by foreign impurities. Due to the material of the rotating ring itself, its impact resistance is poor, and the high-speed moving particles in the operating environment may impact the surface of the rotating ring. Over time, frequent particle impacts may cause micro-cracks or even overall fragmentation on the surface of the rotating ring, thereby destroying the sealing effect and causing leakage problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a single-end face assembled mechanical seal for the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved by the following technical solutions: A single-end face assembled mechanical seal includes:

[0006] A shaft sleeve, on which a rotating ring is sleeved. The rotating ring is axially fixedly connected to the shaft sleeve, and the rotating ring is arranged on the medium side.

[0007] A protective ring, which is sleeved on the rotating ring, and the inner circumferential surface of the protective ring is in contact with the outer circumferential surface of the rotating ring to form an impact-resistant protective layer on the outer circumferential surface of the rotating ring.

[0008] A sealing disc, which is sleeved on the shaft sleeve. A stationary ring is installed on the sealing disc, and the stationary ring is in contact with the rotating ring to form a sealing surface.

[0009] Preferably, a rotating ring seat is also sleeved on the shaft sleeve. The rotating ring is installed on the rotating ring seat. The rotating ring seat is circumferentially fixedly connected to the shaft sleeve, and the rotating ring seat is allowed to axially move relative to the shaft sleeve.

[0010] Preferably, a spring and a spring seat are also sleeved on the shaft sleeve. The spring seat is fixedly connected to the shaft sleeve. One end of the spring is in contact with the rotating ring seat and the other end is in contact with the spring seat. The spring applies a sealing pressure towards the stationary ring to the rotating ring through the rotating ring seat.

[0011] Preferably, a plurality of the springs are provided, and the springs are uniformly arranged around the sleeve.

[0012] Preferably, the spring seat is connected with a transmission screw, and the transmission screw penetrates into the moving ring seat.

[0013] Preferably, at least two sealing rings are arranged between the stationary ring and the sealing disc.

[0014] Preferably, the stationary ring and the sealing disc are circumferentially fixedly connected through a stop pin.

[0015] Preferably, a fastening ring is further sleeved on the sleeve, a positioning block is arranged between the fastening ring and the sealing disc, and the positioning block is connected with the sealing disc through a connecting screw.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] 1. By sleeving a protection ring on the outer periphery of the moving ring, the direct impact of particles on the moving ring is reduced, the impact resistance of the moving ring is greatly improved, and the possibility of seal failure caused by impact of the moving ring is reduced.

[0018] 2. The introduction of the moving ring seat can provide an installation base for the moving ring. The moving ring seat has a certain floating space in the axial direction, so that the moving ring can perform axial compensation during wear. At the same time, the moving ring seat is axially fixedly connected with the sleeve, and the moving ring is fixedly connected with the moving ring seat. This means that the moving ring can rotate together with the sleeve (rotating seat). When the moving ring wears, the moving ring seat moves towards the stationary ring under the action of the spring to compensate for the wear amount.

[0019] 3. A plurality of springs are uniformly distributed around the sleeve, which can ensure that the moving ring receives uniform sealing pressure in the entire circumferential direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic structural diagram of a single-end face assembled mechanical seal of the utility model.

[0021] Figure 2 FIG. is a partial schematic diagram of a single-end face assembled mechanical seal of the utility model.

[0022] In the figure, 100, sleeve; 110, spring; 120, spring seat; 130, transmission screw; 140, fastening ring; 141, set screw; 150, positioning block; 200, protection ring; 300, sealing disc; 310, stationary ring; 320, sealing ring; 330, stop pin; 400, moving ring seat; 410, moving ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following are specific embodiments of the present utility model, in combination with the accompanying drawings, to further describe the technical solutions of the present utility model. However, the present utility model is not limited to these embodiments.

[0024] As Figure 1 shown, a single-end face assembled mechanical seal includes: a shaft sleeve 100, a dynamic ring 410 is sleeved on the shaft sleeve 100, the dynamic ring 410 is axially fixedly connected to the shaft sleeve 100, and the dynamic ring 410 is arranged on the medium side; a protective ring 200, the protective ring 200 is sleeved on the dynamic ring 410, and the inner peripheral surface of the protective ring 200 is in contact connection with the outer peripheral surface of the dynamic ring 410 to form an anti-impact protective layer on the outer peripheral surface of the dynamic ring 410; a sealing disc 300, the sealing disc 300 is sleeved on the shaft sleeve 100, a static ring 310 is installed on the sealing disc 300, and the static ring 310 is in contact with the dynamic ring 410 to form a sealing surface.

[0025] The main purpose of adding the protective ring 200 in this design is to improve the anti-impact ability of the dynamic ring 410, reduce the impact of foreign impurities on the dynamic ring 410 due to its direct exposure to the medium, and thus reduce the possibility of damage to the dynamic ring 410 caused by impact and seal failure. The design of the protective ring 200 is to sleeve a protective layer on the outer peripheral surface of the dynamic ring 410, and the inner peripheral surface of the protective ring 200 is in contact connection with the outer peripheral surface of the dynamic ring 410, so that an anti-impact protective layer is formed on the outer peripheral surface of the dynamic ring 410. When the medium contains sand or other particulate matter, these particles first come into contact with the protective ring 200 rather than the dynamic ring 410. The protective ring 200 absorbs the impact energy of the particles, thereby reducing the chance of the particles directly hitting the surface of the dynamic ring 410. In this way, the protective ring 200 effectively reduces the risk of wear, cracks and even fragmentation on the surface of the dynamic ring 410, extends the service life of the mechanical seal, and improves the reliability of the seal.

[0026] The design of the protective ring 200 aims to reduce the direct impact of particulate matter on the dynamic ring 410, thereby improving the anti-impact ability of the dynamic ring 410 and reducing the possibility of seal failure. Preferably, the protective ring 200 can cover only a part of the dynamic ring 410 or completely cover the dynamic ring 410. Even if only partially covering the dynamic ring 410, the protective ring 200 can play an anti-impact effect to a certain extent, effectively reducing the wear of the dynamic ring 410 and reducing the probability of the dynamic ring 410 cracking due to impact.

[0027] It should be noted that the protective ring 200 has a certain hardness and wear resistance and can withstand the impact of particulate matter in the medium without being easily damaged. When the protective ring 200 partially covers the dynamic ring 410, it can provide protection in the key areas most vulnerable to impact. Although it is not a full-range protection, the protection in these key areas can significantly improve the service life of the dynamic ring 410 and the reliability of the seal system.

[0028] As Figure 1-2 shown, on the basis of the above-described embodiment, a moving ring seat 400 is further sleeved on the shaft sleeve 100. The moving ring 410 is installed on the moving ring seat 400. The moving ring seat 400 is circumferentially fixedly connected to the shaft sleeve 100, and the moving ring seat 400 is allowed to axially move relative to the shaft sleeve 100.

[0029] Introducing the moving ring seat 400 can provide an installation base for the moving ring 410. The moving ring seat 400 can have a certain floating space axially, enabling the moving ring 410 to axially compensate for wear. At the same time, the moving ring seat 400 is axially fixedly connected to the shaft sleeve 100, and the moving ring 410 is fixedly connected to the moving ring seat 400. This means that the moving ring 410 can rotate together with the shaft sleeve 100 (rotating seat). When the moving ring 410 wears, under the action of the spring 110, the moving ring seat 400 moves towards the direction close to the stationary ring 310 to compensate for the wear amount.

[0030] On the basis of the above-described embodiment, a spring 110 and a spring seat 120 are further sleeved on the shaft sleeve 100. The spring seat 120 is fixedly connected to the shaft sleeve 100. One end of the spring 110 is in contact connection with the moving ring seat 400 and the other end is in contact connection with the spring seat 120. The spring 110 applies a sealing pressure towards the stationary ring 310 to the moving ring 410 through the moving ring seat 400.

[0031] The addition of the spring 110 ensures that the moving ring 410 always maintains good contact with the stationary ring 310, and can maintain a stable sealing pressure even during the rotation of the shaft, improving the sealing reliability. At the same time, the spring 110 can also provide wear compensation for the moving ring 410. When the moving ring 410 wears, the spring 110 pushes the moving ring 410 to displace axially to compensate for the wear amount.

[0032] On the basis of the above-described embodiment, the number of the springs 110 is multiple, and each spring 110 is uniformly arranged around the shaft sleeve 100.

[0033] The multiple springs 110 are uniformly distributed around the shaft sleeve 100, which can ensure that the moving ring 410 receives uniform sealing pressure in the entire circumferential direction. This can avoid problems of poor sealing caused by too high or too low local pressure, such as severe wear on one side of the sealing surface and loose sealing on the other side. The uniform pressure distribution helps to maintain good contact between the moving ring 410 and the stationary ring 310, thereby improving the sealing reliability and reducing the risk of leakage.

[0034] On the basis of the above - mentioned embodiments, a transmission screw 130 is connected to the spring seat 120, and the transmission screw 130 penetrates into the moving ring seat 400. The spring seat 120 is fixedly connected to the shaft sleeve 100. The spring seat 120 can be regarded as a part of the shaft sleeve 100. The moving ring seat 400 is circumferentially fixedly connected to the spring seat 120 through the transmission screw 130, which means that the moving ring seat 400 is circumferentially fixedly connected to the shaft sleeve 100. At the same time, the transmission screw 130 also allows the moving ring seat 400 to axially move relative to the spring seat 120 (shaft sleeve 100) to compensate for the wear of the moving ring 410.

[0035] On the basis of the above - mentioned embodiments, at least two sealing rings 320 are arranged between the stationary ring 310 and the sealing disc 300. Increasing the number of the sealing rings 320 improves the sealing performance between the stationary ring 310 and the sealing disc 300, and further enhances the sealing effect.

[0036] On the basis of the above - mentioned embodiments, the stationary ring 310 and the sealing disc 300 are circumferentially fixedly connected through a stop pin 330. The design of the stop pin 330 ensures the relative position between the stationary ring 310 and the sealing disc 300 is fixed, preventing the stationary ring 310 from moving relative to the sealing disc 300 during operation.

[0037] On the basis of the above - mentioned embodiments, a fastening ring 140 is also sleeved on the shaft sleeve 100. A positioning block 150 is arranged between the fastening ring 140 and the sealing disc 300, and the positioning block 150 is connected to the sealing disc 300 through a connecting screw. Through the design of the fastening ring 140 and the positioning block 150, the positioning of the sealing disc 300 and the shaft sleeve 100 can be realized, improving the installation accuracy.

[0038] On the basis of the above - mentioned embodiments, a set screw 141 is connected to the fastening ring 140. The set screw 141 passes through the shaft sleeve 100 and can be connected to the rotating shaft, so that the shaft sleeve 100 is circumferentially fixed to the rotating shaft.

[0039] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, the directional indications will also change accordingly.

[0040] In addition, in the present invention, descriptions such as "first", "second", "one" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

Claims

1. A single-end face assembled mechanical seal, characterized in that Comprising: A bushing (100) with a moving ring (410) sleeved thereon. The moving ring (410) is axially fixedly connected to the bushing (100), and the moving ring (410) is arranged on the medium side; A protective ring (200) sleeved on the moving ring (410), and the inner peripheral surface of the protective ring (200) is in contact connection with the outer peripheral surface of the moving ring (410) to form an anti-impact protective layer on the outer peripheral surface of the moving ring (410); A sealing disc (300) sleeved on the bushing (100). A stationary ring (310) is installed on the sealing disc (300), and the stationary ring (310) is in contact with the moving ring (410) to form a sealing surface.

2. The single-end face assembled mechanical seal according to claim 1, characterized in that: A moving ring seat (400) is also sleeved on the bushing (100). The moving ring (410) is installed on the moving ring seat (400). The moving ring seat (400) is circumferentially fixedly connected to the bushing (100), and the moving ring seat (400) is allowed to axially move relative to the bushing (100).

3. The single-end face assembled mechanical seal according to claim 2, characterized in that: A spring (110) and a spring seat (120) are also sleeved on the bushing (100). The spring seat (120) is fixedly connected to the bushing (100). One end of the spring (110) is in contact connection with the moving ring seat (400) and the other end is in contact connection with the spring seat (120). The spring (110) applies a sealing pressure towards the stationary ring (310) to the moving ring (410) through the moving ring seat (400).

4. The single-end face assembled mechanical seal according to claim 3, characterized in that: The number of the springs (110) is multiple, and each of the springs (110) is uniformly arranged around the bushing (100).

5. The single-end face assembled mechanical seal according to claim 2, wherein: The spring seat (120) is connected with a transmission screw (130), and the transmission screw (130) penetrates into the moving ring seat (400).

6. The single-end face assembled mechanical seal according to claim 1, wherein: At least two sealing rings (320) are arranged between the stationary ring (310) and the sealing disc (300).

7. A single-end face assembled mechanical seal according to claim 1 or 6, characterized in that: The stationary ring (310) and the sealing disc (300) are circumferentially fixedly connected through a stop pin (330).

8. The single-end face assembled mechanical seal according to claim 1, characterized in that: A fastening ring (140) is also sleeved on the bushing (100). A positioning block (150) is arranged between the fastening ring (140) and the sealing disc (300), and the positioning block (150) is connected to the sealing disc (300) through a connecting screw.

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