Mechanical seal with shaft sleeve locking assembly

Abstract

The utility model discloses a mechanical seal with a shaft sleeve locking component, which comprises a rotating shaft and a shaft sleeve sleeved outside the rotating shaft, the shaft sleeve is in interference fit with the rotating shaft, the mechanical seal further comprises an oil box, a moving ring component is arranged on the shaft sleeve, and a static ring component matched with the moving ring component is arranged in the oil box. The sealing device further comprises a locking assembly used for pressing the shaft sleeve downwards, the locking assembly comprises a T-shaped cylinder arranged outside the rotating shaft in a sleeving mode and connected to the upper end face of the shaft sleeve in an abutting mode, and the T-shaped cylinder is sleeved with a cambered surface sleeve. The stability of the internal structure is improved; the oil injection hole is formed in the oil box, a worker can replace lubricating oil in the oil box to remove chippings generated by mutual friction of the static ring and the movable ring, and the service life of the sealing device is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical seal technical field especially relates to a mechanical seal with shaft sleeve locking assembly. BACKGROUND

[0002] Mechanical seal is a device for rotating machinery shaft seal, it is mainly used for preventing fluid (such as liquid or gas) between rotating shaft and equipment shell leakage.

[0003] Mechanical seal is generally provided with a dynamic ring and static ring, in order to make the dynamic ring and static ring between the compression degree of adjustment, in the application No. 202221564912.8 disclosed a kind of adjustable mechanical seal, however, the dynamic ring in this machine seal is directly arranged on shaft body, and shaft body is not provided with shaft sleeve, this makes shaft body and dynamic ring possibly exist greater wear, reduce the service life of equipment, however, if it is directly in shaft body outside setting shaft sleeve, again, dynamic ring is installed in shaft sleeve outside, under the action of spring in this machine seal, shaft sleeve is easy to move upward, therefore, it needs to be improved, to make machine seal can limit the shaft sleeve outside shaft body. SUMMARY

[0004] In view of the deficiencies of prior art, the utility model provides a kind of mechanical seal with shaft sleeve locking assembly to solve the problems mentioned in the above background art.

[0005] The utility model provides the following technical scheme: a kind of mechanical seal with shaft sleeve locking assembly, including rotating shaft and the shaft sleeve of sleeve in rotating shaft outside, the shaft sleeve is on the rotating shaft with interference fit, still include oil box, the dynamic ring component of being provided with on the shaft sleeve, and the static ring component of being provided with in the oil box with the dynamic ring component cooperation;

[0006] Still include the locking assembly for the shaft sleeve of down-pressing, the locking assembly includes T type cylinder of being sleeved in rotating shaft outside and being abutted on the upper end surface of shaft sleeve, arc surface sleeve is sleeved in the T type cylinder, the diameter of arc surface sleeve is set as first increases and then decreases along downward direction to constitute a curved surface, and the upper and lower sliding connection of two lock sleeves is connected outside the T type cylinder, the inner side of two locking sleeves is the curved surface of sticking to the arc surface sleeve, and two locking sleeves are compared with the arc surface sleeve and symmetrically set up, two locking sleeves are connected by fastener.

[0007] Preferably, the fastener is a No. one bolt, the head of No. one bolt is attached to the upper side of the upper side of the locking sleeve, and the screw rod part of No. one bolt is threadedly connected in the lower side of the locking sleeve.

[0008] Preferably, the dynamic ring component includes spring seat arranged outside the shaft sleeve, and the dynamic ring is loaded in the spring seat.

[0009] Preferably, the static ring assembly comprises an inner ring groove arranged in the upper side of the oil box, and a static ring is arranged in the inner ring groove, the static ring abuts against the lower end of the dynamic ring, and the dynamic ring can rotate relative to the static ring.

[0010] Preferably, the outer edge of the upper side of the static ring is sunken to form an outer ring groove, and a static ring gland is arranged in the outer ring groove, and the static ring gland is connected to the oil box by the second bolt.

[0011] Preferably, an oil injection hole is arranged in the side of the oil box, the oil injection hole is communicated with the inner hole of the dynamic ring and the static ring, a retaining ring is further arranged in the oil box, the retaining ring extends to the upper side of the contact surface of the dynamic ring and the static ring, and a plug is arranged in the oil injection hole.

[0012] Preferably, a fixed adjusting ring and a compression ring are arranged outside the shaft sleeve, the spring seat is connected to the lower side of the compression ring by a spring, and a third bolt is threadedly connected in the fixed adjusting ring, and the lower end of the third bolt abuts against the upper side of the compression ring.

[0013] Preferably, the dynamic ring is a bellows dynamic ring, the dynamic ring comprises a lower ring, an upper ring and a bellows sleeve connecting the lower ring and the upper ring, the lower ring is fixed in the spring seat and abuts against the static ring, the upper ring is fixed to the inner side of the compression ring, and the upper ring is slidingly connected to the outer side of the shaft sleeve.

[0014] Preferably, a first sealing ring is arranged in the shaft sleeve and adheres to the rotating shaft, and a second sealing ring is arranged in the upper ring and adheres to the curved surface of the shaft sleeve.

[0015] Preferably, a convex ring is integrally formed on the curved surface of the shaft sleeve, and the fixed adjusting ring abuts against the lower side of the convex ring.

[0016] The utility model provides a mechanical seal with shaft sleeve locking assembly has the following beneficial effects:

[0017] The pressure between the inner static ring and the dynamic ring can be adjusted, and the up-down position of the shaft sleeve is locked in the utility model, so that the structural stability of the utility model is increased.

[0018] The utility model is provided with an oil injection hole in the oil box, and the staff can replace the lubricating oil in the oil box to remove the debris generated by the mutual friction of the static ring and the dynamic ring, so that the service life of the utility model is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structure schematic view in the utility model;

[0020] Figure 2 It isFigure 1 Enlarged schematic view at A in the figure.

[0021] In the figure:

[0022] 11, rotating shaft; 12, shaft sleeve; 13, blocking ring; 14, oil box; 15, T-shaped cylinder; 16, cambered sleeve; 17, locking sleeve; 18, spring seat; 19, moving ring; 20, inner ring groove; 21, static ring; 22, outer ring groove; 23, static ring gland; 24, oil injection hole; 25, fixed adjusting ring; 26, compression ring; 28, spring; 29, No. 3 bolt; 30, convex ring; 41, lower ring; 42, upper ring; 43, corrugated sleeve. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, examples of which are shown in the drawings. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0024] In the description of the present application, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0026] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] Reference Figures 1-2According to the embodiment of the utility model discloses a mechanical seal with shaft sleeve locking assembly, including the shaft 11 and the sleeve of shaft sleeve 12 that sets up on the shaft 11 outside, the shaft sleeve 12 is on the shaft 11 with interference fit, still include oil box 14, the shaft sleeve 12 is provided with dynamic ring assembly, and the oil box 14 is provided with static ring assembly with dynamic ring assembly cooperation in.

[0028] In the embodiment, in order to avoid the shaft sleeve 12 upward movement, still include the locking assembly for pressing down the shaft sleeve 12, the locking assembly includes the T type cylinder 15 that sets up on the shaft 11 outside and abuts on the upper end surface of the shaft sleeve 12, the T type cylinder 15 is equipped with cambered surface sleeve 16, the outer diameter of cambered surface sleeve 16 is set as first increases and then decreases along the downward direction to constitute a curved surface, and the T type cylinder 15 is slidably connected with two lock sleeves 17 outside, the inner side of two the lock sleeve 17 is the curve of cambered surface sleeve 16, and two the lock sleeve 17 is compared with cambered surface sleeve 16 and is symmetrically arranged, two the lock sleeve 17 is connected through fastener, in the embodiment, the fastener is a bolt, the head of the bolt is attached to the upper side of the lock sleeve 17, and the screw rod of the bolt is screwed into the lock sleeve 17, the staff can tighten the bolt, so that two the lock sleeve 17 is close to each other, and the cambered surface sleeve 16 is pressed inward, thereby increasing the friction between the T type cylinder 15 and the shaft 11, so that the T type cylinder 15 locks the up-down position, and avoids the shaft sleeve 12 upward movement.

[0029] In addition, the dynamic ring assembly includes a spring seat 18 disposed outside the shaft sleeve 12, and the spring seat 18 is provided with a dynamic ring 19, the static ring assembly includes an inner ring groove 20 disposed in the upper side of the oil box 14, and the inner ring groove 20 is provided with a static ring 21, the static ring 21 abuts against the lower end of the dynamic ring 19, and the dynamic ring 19 can rotate relative to the static ring 21.

[0030] In order to lock the relative position and angle between the static ring 21 and the oil box 14, the outer edge of the upper side of the static ring 21 is sunken to form an outer ring groove 22, and the outer ring groove 22 is provided with a static ring gland 23, and the static ring gland 23 is connected to the oil box 14 by a second bolt.

[0031] Further, in order to adjust the force of the dynamic ring 19 pressing on the static ring 21, a fixed adjusting ring 25 and a compression ring 26 are provided outside the shaft sleeve 12, the spring seat 18 is connected to the lower side of the compression ring 26 by a spring 28, and the fixed adjusting ring 25 is provided with a third bolt 29 screwed therein, and the lower end of the third bolt 29 abuts against the upper side of the compression ring 26.

[0032] Furthermore, the outer curved surface of the bushing 12 is integrally formed with a convex ring 30, and the fixed adjustment ring 25 abuts against the lower side of the convex ring 30. Under the action of the locking component, the bushing 12 can be regarded as being relatively stationary with respect to the rotating shaft 11, thereby allowing the convex ring 30 to limit the fixed adjustment ring 25. The operator can rotate the No. 3 bolt 29 to adjust the vertical position of the clamping ring 26 relative to the bushing 12, thereby adjusting the elastic potential energy of the spring 28 and the degree of clamping between the moving ring 19 and the stationary ring 21.

[0033] Furthermore, to further improve the sealing effect, the moving ring 19 is a bellows moving ring, and the moving ring 19 includes a lower ring 41, an upper ring 42, and a bellows sleeve 43 connecting the lower ring 41 and the upper ring 42. The lower ring 41 is fixed inside the spring seat 18 and abuts against the stationary ring 21. The upper ring 42 is fixed to the inner side of the clamping ring 26, and the upper ring 42 is slidably connected to the outside of the bushing 12. A first sealing ring is provided inside the bushing 12 and attached to the rotating shaft 11. A second sealing ring is provided inside the upper ring 42 and attached to the outer curved surface of the bushing 12.

[0034] In a second embodiment of the mechanical seal with a bushing locking assembly, to facilitate the discharge of debris generated by the friction between the rotating ring 19 and the stationary ring 21, a retaining ring 13 is fitted inside the oil box 14 and sleeved on the outside of the rotating shaft 11. There is a certain gap between the retaining ring 13 and the rotating shaft 11, and the retaining ring 13 extends to the upper side of the contact surface between the stationary ring 21 and the rotating ring 19. An oil filling hole 24 is provided in the side of the oil box 14, and the oil filling hole 24 communicates with the inner hole of the rotating ring 19 and the stationary ring 21. The oil box 14 also includes a plug for sealing the oil filling hole 24.

[0035] Through the design of the retaining ring 13, the debris generated by friction between the moving ring 19 and the stationary ring 21 will be blocked outside the retaining ring 13, and the operator can periodically change the lubricating oil in the oil filling hole 24 to remove debris. In addition, the mechanical seal with a bushing locking assembly can only... Figure 1 The vertical arrangement shown is to prevent the retaining ring 13 from failing.

[0036] A gasket is provided between the stationary ring cover 23 and the stationary ring 21, and between the stationary ring 21 and the bottom surface of the inner ring groove 20, for shock absorption.

[0037] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A mechanical seal with a bush locking assembly, comprising a rotating shaft (11) and a bush (12) sleeved on the rotating shaft (11), characterized in that: The shaft sleeve (12) is interference fitted on the rotating shaft (11), further comprising an oil box (14), the shaft sleeve (12) is provided with a dynamic ring assembly, and the oil box (14) is provided with a static ring assembly matched with the dynamic ring assembly; Further comprising a locking assembly for pressing down the shaft sleeve (12), the locking assembly comprises a T-shaped cylinder (15) sleeved on the rotating shaft (11) and abutting against the upper end surface of the shaft sleeve (12), an arc surface sleeve (16) is sleeved on the T-shaped cylinder (15), the diameter of the arc surface sleeve (16) is designed to increase first and then decrease along the downward direction to form a curved surface, and two lock sleeves (17) are slidably connected to the upper and lower sides of the T-shaped cylinder (15), the inner side surfaces of the two lock sleeves (17) are attached to the curved surface of the arc surface sleeve (16), and the two lock sleeves (17) are symmetrically arranged on the upper and lower sides of the arc surface sleeve (16), and the two lock sleeves (17) are connected by fasteners.

2. A mechanical seal with a bushing lock assembly in accordance with claim 1, wherein: The fastener is a first bolt, the head of the first bolt is attached to the upper side surface of the upper lock sleeve (17), and the threaded rod of the first bolt is threadedly connected to the inner side surface of the lower lock sleeve (17).

3. A mechanical seal with a bushing lock assembly in accordance with claim 1, wherein: The dynamic ring assembly comprises a spring seat (18) arranged outside the shaft sleeve (12), and the spring seat (18) is provided with a dynamic ring (19).

4. A mechanical seal with a bushing lock assembly in accordance with claim 3, wherein: The static ring assembly comprises an inner ring groove (20) arranged in the upper side surface of the oil box (14), and the inner ring groove (20) is provided with a static ring (21), the static ring (21) abuts against the lower end of the dynamic ring (19), and the dynamic ring (19) can rotate relative to the static ring (21).

5. A mechanical seal with a bushing lock assembly in accordance with claim 4, wherein: The upper side surface of the static ring (21) is sunken at the outer edge to form an outer ring groove (22), and the outer ring groove (22) is provided with a static ring gland (23), and the static ring gland (23) is connected to the oil box (14) by a second bolt.

6. A mechanical seal with a bushing lock assembly in accordance with claim 4, wherein: The oil box (14) is provided with an oil injection hole (24) in the side surface, the oil injection hole (24) is communicated with the inner holes of the dynamic ring (19) and the static ring (21), the oil box (14) is further provided with a check ring (13), the check ring (13) extends to the upper side of the contact surface between the static ring (21) and the dynamic ring (19), and the oil injection hole (24) is provided with a plug.

7. A mechanical seal with a bushing lock assembly in accordance with claim 4, wherein: The shaft sleeve (12) is provided with a fixed adjusting ring (25) and a compression ring (26), the spring seat (18) is connected to the lower side surface of the compression ring (26) by a spring (28), and the fixed adjusting ring (25) is threadedly connected with a third bolt (29), and the lower end of the third bolt (29) abuts against the upper side surface of the compression ring (26).

8. A mechanical seal with a bushing lock assembly in accordance with claim 7, wherein: The dynamic ring (19) is a bellows dynamic ring, the dynamic ring (19) comprises a lower ring (41), an upper ring (42) and a bellows cover (43) connecting the lower ring (41) and the upper ring (42), the lower ring (41) is fixed in the spring seat (18) and abuts on the static ring (21), the upper ring (42) is fixed on the inner side of the compression ring (26), and the upper ring (42) is slidingly connected to the outer side of the shaft sleeve (12).

9. A mechanical seal with a bushing lock assembly according to claim 8, wherein: A first sealing ring is arranged in the shaft sleeve (12) and attached to the rotating shaft (11), and a second sealing ring is arranged in the upper ring (42) and attached to the outer curved surface of the shaft sleeve (12).

10. A mechanical seal with a bushing lock assembly in accordance with claim 7, wherein: The outer curved surface of the shaft sleeve (12) is integrally formed with a convex ring (30), and the fixed adjusting ring (25) abuts on the lower side of the convex ring (30).

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