Mechanical sealing device with good stability

Abstract

The mechanical sealing device with the good stability comprises a static ring, a movable ring, a spring, a spring seat and a plurality of guide screw rods, a fitting table is arranged at one end of the static ring, a fitting groove matched with the fitting table is formed in one end of the movable ring, and a plurality of connecting holes are evenly distributed in the surface of the other end of the movable ring along the circle center. A plurality of sliding holes are evenly distributed in the surface of the spring seat along the circle center, the guide screws penetrate through the sliding holes and are connected into the connecting holes in a screwed mode, a first sleeving part is arranged on the inner side of the end, away from the attaching groove, of the movable ring along the circle center, and a second sleeving part is arranged on the inner side of the end, close to the movable ring, of the spring seat along the circle center. The spring is arranged between the movable ring and the spring seat, and the two ends of the spring are arranged on the first sleeving part and the second sleeving part in a sleeving mode respectively. The dynamic stability, the compensation performance and the service life of the mechanical seal can be remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical seal technical field, concretely relates to a mechanical seal device with good stability. BACKGROUND

[0002] Mechanical seal, also known as face seal, is a device for the shaft seal device of rotating machinery, aiming at preventing fluid leakage. It is composed of at least a pair of end faces perpendicular to the rotation axis, which are kept in close contact and relative sliding under the action of fluid pressure and the elastic force (or magnetic force) of compensation mechanism, as well as the cooperation of auxiliary seal. Mechanical seal is widely used in centrifugal pump, centrifuge, reaction kettle and compressor and other equipment, because of its advantages such as small leakage and long service life, it becomes the most important shaft sealing method of these equipment.

[0003] The existing spring type mechanical seal may cause the dynamic ring to tilt during rotation and axial compensation process, resulting in uneven force on the sealing end face between the dynamic ring and the static ring, and causing local wear or leakage due to uneven spring force, shaft swing or installation deviation.

[0004] Therefore, the applicant has made beneficial design and found a method to solve the above problems. The technical scheme to be introduced below is generated in this background. CONTENT OF THE UTILITY MODEL

[0005] The utility model relates to a mechanical seal device with good stability to solve the problems raised in the background technology.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] A mechanical seal device with good stability, comprising a static ring, a dynamic ring, a spring, a spring seat, and a plurality of guide screws, the static ring is provided with a fitting table at one end, the dynamic ring is provided with a fitting groove matched with the fitting table at one end, the surface of the other end of the dynamic ring is uniformly distributed with a plurality of connecting holes along the center, the surface of the spring seat is uniformly distributed with a plurality of sliding holes along the center, a plurality of guide screws pass through a plurality of sliding holes and are screwed into a plurality of connecting holes, the inside of the end of the dynamic ring away from the fitting groove is provided with a sleeve part one along the circumference of the center, the inside of the end of the spring seat close to the dynamic ring is provided with a sleeve part two along the circumference of the center, the spring is arranged between the dynamic ring and the spring seat, and the two ends of the spring are sleeved in the sleeve part one and the sleeve part two respectively.

[0008] Preferably, the radial surface of the static ring is provided with a plurality of screw holes, and a locking screw is arranged in each of the plurality of screw holes.

[0009] Preferably, the static ring is sleeved with a static ring sealing ring on the outside, and the dynamic ring is sleeved with a dynamic ring sealing ring on the outside.

[0010] Preferably, the static ring, the dynamic ring, the spring and the spring seat are arranged in sequence and the shaft centers coincide with each other.

[0011] Advantages

[0012] The technical scheme provided by the mechanical sealing device with good stability has at least one of the following technical effects:

[0013] According to the technical scheme, the guide structure is provided between the dynamic ring and the spring seat by the guide screws, so that the radial movement of the dynamic ring is limited, the dynamic ring is forced to slide only in the axial direction, the parallel fitting between the end surface of the fitting groove and the fitting table is maintained, and the eccentric wear is avoided, so that the dynamic stability, compensation performance and service life of the mechanical sealing device can be improved significantly. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the utility model;

[0015] Figure 2 It is an explosion structure schematic view of the utility model;

[0016] Figure 3 It is a static ring structure schematic view of the utility model;

[0017] Figure 4 It is a dynamic ring structure schematic view of the utility model;

[0018] Figure 5 It is a spring seat structure schematic view of the utility model.

[0019] The corresponding relationship between the annotations of the drawings and the component names is as follows:

[0020] 1, static ring; 2, dynamic ring; 3, spring; 4, spring seat; 5, guide screw; 6, fitting table; 7, fitting groove; 8, connecting hole; 9, sliding hole; 10, sleeve part one; 11, sleeve part two; 12, screw hole; 13, locking screw; 14, static ring sealing ring; 15, dynamic ring sealing ring. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model will be described clearly and completely in combination with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] To avoid excessive and unnecessary details, well-known structures or functions will not be described in detail in the following embodiments.

[0025] like Figures 1-5 The diagram shown is a structural schematic of a mechanical seal device with good stability according to a preferred embodiment of the present invention.

[0026] In this embodiment, the device includes a stationary ring 1, a rotating ring 2, a spring 3, a spring seat 4, and several guide screws 5. One end of the stationary ring 1 has a mating platform 6, and one end of the rotating ring 2 has a mating groove 7 that mates with the mating platform 6. The other end of the rotating ring 2 has several connecting holes 8 evenly distributed along its center, all of which are threaded holes. The surface of the spring seat 4 has several sliding holes 9 evenly distributed along its center, all of which are circular holes. Several guide screws 5 pass through several sliding holes 9 and are screwed into several connecting holes 8. The inner walls of several sliding holes 9 are coated with lubricating grease to ensure smooth movement between the sliding holes 9 and the guide screws 5. The rotating ring 2 has a first sleeve portion 10 on the inner side of the end opposite to the fitting groove 7 along the center circle. The spring seat 4 has a second sleeve portion 11 on the inner side of the end near the rotating ring 2 along the center circle. The spring 3 is located between the rotating ring 2 and the spring seat 4. The two ends of the spring 3 are respectively fitted onto the first sleeve portion 10 and the second sleeve portion 11. A number of guide screws 5 provide a guiding structure between the rotating ring 2 and the spring seat 4 to limit the radial movement of the rotating ring 2 and force it to slide only along the axial direction, maintaining the parallel fit between the end faces of the fitting groove 7 and the fitting table 6, avoiding uneven wear, thereby significantly improving the dynamic stability, compensation performance and service life of the mechanical seal.

[0027] In the embodiment, the static ring 1 is provided with a plurality of screw holes 12 on the radial surface, and a locking screw 13 is arranged in each of the screw holes 12, and the static ring 1 is locked on the equipment shaft by tightening the locking screw 13.

[0028] In the embodiment, the static ring 1 is provided with a static ring sealing ring 14 on the outer side, and the dynamic ring 2 is provided with a dynamic ring sealing ring 15 on the outer side, and the static ring 1 and the dynamic ring 2 are sealed on the outer side by the static ring sealing ring 14 and the dynamic ring sealing ring 15.

[0029] In the embodiment, the static ring 1, the dynamic ring 2, the spring 4 and the spring seat 4 are arranged in sequence and the shaft centers are coincided with each other, so that the sealing end face is uniformly stressed and eccentric movement is avoided.

[0030] The mechanical sealing device with good stability of the utility model, its installation mode, connection mode or setting mode are all common mechanical mode, as long as can achieve its beneficial effect can be implemented.

[0031] The utility model is not carried out detailed explanation of the technology, and the content represented in the drawing is a part of the specification.

[0032] The above content is further detailed description of the utility model combined with specific embodiments, and cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary skilled in the art of the utility model, on the premise of not departing from the concept of the utility model, a number of simple deductions or substitutions can be made, which should be regarded as belonging to the protection scope determined by the claims of the utility model.

Claims

1. A mechanical seal device with high stability, characterized by: It include static ring (1), dynamic ring (2), spring (3), spring seat (4) and several guide screw (5), one end of static ring (1) is equipped with fitting platform (6), one end of dynamic ring (2) is equipped with fitting groove (7) matched with fitting platform (6), the surface of other end of dynamic ring (2) is evenly distributed and equipped with several connecting holes (8) along the center of circle, the surface of spring seat (4) is evenly distributed and equipped with several sliding holes (9) along the center of circle, several guide screw (5) respectively pass through several sliding holes (9) and are screwed into several connecting holes (8), the inside of one end of dynamic ring (2) away from fitting groove (7) is equipped with sleeve joint part one (10) along the center of circle, the inside of one end of spring seat (4) close to dynamic ring (2) is equipped with sleeve joint part two (11) along the center of circle, spring (3) is arranged between dynamic ring (2) and spring seat (4), both ends of spring (3) are respectively sleeved in sleeve joint part one (10) and sleeve joint part two (11).

2. The mechanical seal device according to claim 1, wherein: The radial surface of static ring (1) is equipped with several screw holes (12), several screw holes (12) are all equipped with locking screw (13).

3. The mechanical seal device according to claim 1, wherein: The outside of static ring (1) is sleeved with static ring sealing ring (14), the outside of dynamic ring (2) is sleeved with dynamic ring sealing ring (15).

4. The mechanical seal device according to claim 1, wherein: The static ring (1), dynamic ring (2), spring (3) and spring seat (4) are arranged in turn and the shafts of them coincide with each other.

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