A shaft sleeve and dynamic ring connection structure

Abstract

The utility model discloses a shaft sleeve and moving ring connecting structure, comprising a shaft sleeve and a moving ring; a shaft sleeve retaining ring is integrally formed on the top of the shaft sleeve, a moving ring retaining ring is integrally formed on the inner wall of the moving ring, the moving ring retaining ring and the shaft sleeve retaining ring are matched, a moving ring pressure plate is arranged below the moving ring retaining ring; a clamping ring is abutted against the lower part of the moving ring pressure plate, a retaining ring is abutted against the lower part of the clamping ring, a retaining ring groove is provided on the shaft sleeve, and the retaining ring is clamped in the retaining ring groove; two arc-shaped pin grooves are symmetrically provided at the moving ring retaining ring of the moving ring, a pin hole is provided on the shaft sleeve, a locating pin is inserted in the pin hole, and an arc-shaped head is integrally formed on the end of the locating pin; the locating pin of the utility model is fixed to the side of the shaft sleeve, which makes the shaft sleeve retaining ring of the shaft sleeve only need to block the moving ring from displacing upward in the axial direction, and does not need to provide a pin hole, and the shaft sleeve retaining ring can be made very thin.

Description

Technical Field

[0001] The utility model relates to the field of mechanical seals, in particular to a connecting structure of a shaft sleeve and a moving ring. Background Art

[0002] A mechanical seal is a device that prevents fluid leakage by having at least one pair of end faces perpendicular to the axis of rotation, which remain in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of an auxiliary seal.

[0003] For example, the patent with authorization announcement number CN214578855U discloses a double-end mechanical seal structure, including a sleeve, a first moving ring, a first stationary ring, a sealing body and a second stationary ring; the sleeve is fixedly sleeved on the rotating shaft, the first moving ring, the first stationary ring, the sealing body, the second stationary ring and the second moving ring are all sleeved on the sleeve, the first stationary ring and the second stationary ring are fixed on the sealing body, the first moving ring and the second moving ring are fixed on the sleeve, and the first moving ring and the first stationary ring are abutted against each other, and the second stationary ring and the second moving ring are abutted against each other.

[0004] The above patent has reliable sealing, a long trial period, and a relatively long maintenance cycle; a flushing hole is provided to remove impurities at the contact between the moving ring and the stationary ring, thereby increasing the service life; however, the above patent uses a cylindrical locating pin between the moving ring and the sleeve to prevent the moving ring from rotating relative to the sleeve, and the locating pin is installed at the end face of the moving ring and the abutting portion of the moving ring, which requires the sleeve itself to have a thicker abutting portion of the moving ring.

[0005] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of the utility model is to provide a shaft sleeve and a moving ring connection structure to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A shaft sleeve and movable ring connection structure comprises a shaft sleeve and a movable ring; a shaft sleeve retaining ring is integrally formed on the top of the shaft sleeve, a movable ring retaining ring is integrally formed on the inner wall of the movable ring, the movable ring retaining ring and the shaft sleeve retaining ring are matched, and a movable ring pressure plate is arranged below the movable ring retaining ring; a clamping ring is abutted below the movable ring pressure plate, a retaining ring is abutted below the clamping ring, a retaining ring groove is provided on the shaft sleeve, and the retaining ring is clamped in the retaining ring groove; two arc-shaped pin grooves are symmetrically provided at the movable ring retaining ring of the movable ring, a pin hole is provided on the shaft sleeve, a locating pin is inserted in the pin hole, and at the same time, an arc-shaped head is integrally formed at the end of the locating pin, the arc-shaped head is clamped in the pin groove, and the outer side surface of the arc-shaped head is arc-shaped.

[0009] Furthermore, a first sealing ring is provided between the dynamic ring retaining ring and the shaft sleeve retaining ring.

[0010] Furthermore, a second sealing ring is provided between the dynamic ring pressure plate and the dynamic ring retaining ring.

[0011] Furthermore, the arc of the arc-shaped head is consistent with that of the pin groove.

[0012] Furthermore, the dynamic ring is made of silicon carbide, and the positioning pin is made of PEEK.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The arc head is consistent with the arc of the pin groove, and the moving ring is made of silicon carbide, and the positioning pin is made of PEEK, which has high temperature resistance and can keep its structure from being deformed due to high temperature when the moving ring is heated. At the same time, it has high mechanical strength and impact resistance. When in use, the shaft sleeve is installed on the rotating shaft, and the shaft sleeve drives the positioning pin to rotate. At this time, the arc head of the positioning pin is close to the inner wall of the pin groove. At this time, the contact between the arc head and the pin groove is surface-to-surface contact, the contact area is large, and the pressure of the arc head on the pin groove is small. At the same time, although the silicon carbide moving ring itself has high hardness, it is also brittle and is prone to breakage when it is hit hard. This solution uses a positioning pin made of PEEK. When the mechanical seal is started, the arc head of the PEEK positioning pin can be slightly deformed when impacting the pin groove, which helps to reduce the impact.

[0015] At the same time, the positioning pin of the utility model is fixed on the side of the shaft sleeve, so that the shaft sleeve retaining ring of the shaft sleeve only needs to prevent the moving ring from moving upward in the axial direction, and does not need to open a pin hole, so the shaft sleeve retaining ring can be made very thin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a structural schematic diagram of a shaft sleeve and a dynamic ring connection structure.

[0017] Figure 2 It is a front view of a shaft sleeve and a moving ring connection structure.

[0018] Figure 3 The figure is a side view of a connection structure between a shaft sleeve and a moving ring.

[0019] Figure 4 for Figure 2 Sectional view along AA direction.

[0020] Figure 5 for Figure 3 Cross-sectional view along the BB axis.

[0021] Figure 6 for Figure 3 Sectional view along CC direction.

[0022] Figure 7 An exploded diagram of a shaft sleeve and a dynamic ring connection structure.

[0023] Figure 8 The present invention is a schematic structural diagram of a positioning pin in a connection structure between a shaft sleeve and a moving ring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0025] See also Figure 1-8 , a shaft sleeve and a moving ring connection structure, comprising a shaft sleeve 1 and a moving ring 2;

[0026] A shaft sleeve retaining ring 3 is integrally formed on the top of the shaft sleeve 1, a moving ring retaining ring 4 is integrally formed on the inner wall of the moving ring 2, a first sealing ring 5 is arranged between the moving ring retaining ring 4 and the shaft sleeve retaining ring 3, the moving ring retaining ring 4 and the shaft sleeve retaining ring 3 are cooperatively arranged to limit the upward displacement of the moving ring 2 in the axial direction, a moving ring pressure plate 6 is arranged below the moving ring retaining ring 4, a second sealing ring 7 is arranged between the moving ring pressure plate 6 and the moving ring retaining ring 4, the first sealing ring 5 and the second sealing ring 7 are both used for sealing connection between the moving ring and the shaft sleeve; a clamping ring 8 is abutted below the moving ring pressure plate 6, a retaining ring 9 is abutted below the clamping ring 8, a retaining ring groove 10 is opened on the shaft sleeve 1, and the retaining ring 9 is clamped in the retaining ring groove 10;

[0027] like Figure 4-6 At the same time, two arc-shaped pin grooves 11 are symmetrically provided at the moving ring retaining ring 4 of the moving ring 2, and a pin hole 12 is provided on the shaft sleeve 1, and a positioning pin 13 is inserted into the pin hole 12. Figure 8 At the same time, the end of the positioning pin 13 is integrally formed with an arc head 14, the arc head 14 is clamped in the pin groove 11, the outer side of the arc head 14 is arc-shaped, and the positioning pin 13 is used to limit the rotation of the dynamic ring 2 compared to the shaft sleeve;

[0028] When assembling the utility model, insert the positioning pin 13 into the pin groove 11, and then install the first sealing ring 5, the dynamic ring 2, the second sealing ring 7, the dynamic ring pressure plate 6 and the clamping ring 8 in order from bottom to top, and then clamp the circlip 9 into the circlip groove 10. At this time, the dynamic ring 2 is fixed on the shaft sleeve 1.

[0029] The arc head 14 is consistent with the curvature of the pin groove 11, and the moving ring is made of silicon carbide, and the positioning pin 13 is made of PEEK, which has high temperature resistance and can keep its own structure from deformation due to high temperature when the moving ring is heated. At the same time, it has high mechanical strength and impact resistance. When in use, the sleeve 1 is installed on the rotating shaft, and the sleeve 1 drives the positioning pin 13 to rotate. At this time, the arc head 14 of the positioning pin is close to the inner wall of the pin groove 11. At this time, the contact between the arc head 14 and the pin groove 11 is surface-to-surface contact, the contact area is large, and the pressure of the arc head 14 on the pin groove 11 is small. At the same time, although the silicon carbide moving ring itself has a high hardness, it is also brittle and is prone to breakage when it is hit hard. This solution uses a positioning pin made of PEEK. When the mechanical seal is started, the arc head 14 of the positioning pin made of PEEK can be slightly deformed when impacting the pin groove 11, which helps to reduce the impact.

[0030] At the same time, the positioning pin of the utility model is fixed on the side of the sleeve, so that the sleeve retaining ring 3 of the sleeve only needs to block the upward displacement of the moving ring 2 in the axial direction, and there is no need to open a pin hole, and the sleeve retaining ring 3 can be made very thin.

[0031] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "connection" and the like should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

Claims

1. A shaft sleeve and a moving ring connection structure, comprising a shaft sleeve and a moving ring; characterized in that: A sleeve retaining ring is integrally formed with the top of the sleeve, and a movable ring retaining ring is integrally formed with the inner wall of the moving ring. The moving ring retaining ring and the sleeve retaining ring are matched with each other, and a moving ring pressure plate is arranged below the moving ring retaining ring; a clamping ring is abutted against the moving ring pressure plate, and a retaining ring is abutted against the clamping ring. A retaining ring groove is provided on the sleeve, and the retaining ring is clamped in the retaining ring groove; two arc-shaped pin grooves are symmetrically provided at the moving ring retaining ring of the moving ring, and a pin hole is provided on the sleeve, and a locating pin is inserted in the pin hole, and at the same time, an arc-shaped head is integrally formed at the end of the locating pin, and the arc-shaped head is clamped in the pin groove, and the outer side surface of the arc-shaped head is arc-shaped.

2. A connection structure of a sleeve and a moving ring according to claim 1, characterized in that: A first sealing ring is arranged between the dynamic ring retaining ring and the shaft sleeve retaining ring.

3. A connection structure of a sleeve and a moving ring according to claim 1, characterized in that: A second sealing ring is arranged between the dynamic ring pressure plate and the dynamic ring retaining ring.

4. A connection structure of a sleeve and a moving ring according to claim 1, characterized in that: The arc of the arc-shaped head is consistent with that of the pin groove.

5. The connection structure of a sleeve and a moving ring according to claim 1, characterized in that: The dynamic ring is made of silicon carbide, and the positioning pin is made of PEEK.

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