Mechanism shaft seal mounting structure

Abstract

The utility model discloses a mechanism shaft seal installation structure which comprises a sealing flange which is arranged between an air box and a mechanism cover and allows a mechanism shaft to penetrate through in a sealing mode, the mechanism cover comprises a bottom plate fixedly connected to the outer wall of the air box, a first shaft hole penetrating through a connecting protrusion is formed in the bottom plate, and a second shaft hole is formed in the air box. The first sealing ring is arranged between the sealing flange and the connecting protrusion to achieve sealing connection between the bottom plate and the sealing flange, and the second sealing ring is arranged between the sealing flange and the gas tank to ensure that sealing connection is formed between the gas tank and the sealing flange. According to the technical scheme, only one flange is needed for sealing installation between the mechanism cover and the air box, the depth of a mechanism chamber is not increased, the mechanism shaft can be connected with the switch body in the air box only by penetrating through the sealing flange in a sealing mode, the installation structure is simplified, installation and connection are convenient and rapid, installation efficiency is improved, and the product protection grade is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of switch equipment operating mechanism, in particular to a mechanism shaft seal installation structure. Background Art

[0002] With the increasing maturity of power supply technology, the application of switch cabinets has become more and more common, and has spread across various large factories and living places. This type of switch cabinet includes ring network cabinets, inflatable cabinets, etc. At present, most of the operating mechanisms of switch cabinet products on the market are exposed to the air. If this continues, it will not only easily damage the mechanism and cause the mechanism to rust, but in severe cases, it is more likely to cause the mechanism to jam directly, seriously affecting the service life of the switch cabinet. For this reason, it is necessary to set a mechanism cover that can seal and accommodate the operating mechanism. This mechanism cover is installed on the outer wall of the gas box of the switch cabinet. According to the mechanism shaft of the operating mechanism, it needs to penetrate into the gas box and connect with the switch body. The switch body can be a circuit breaker or a load switch, etc. Based on the requirements of modularization of the operating mechanism and independent sealing after installation, the mechanism shaft is required to meet the sealing connection requirements with the mechanism cover and the gas box respectively, and the gas box and the mechanism cover need to be sealed with a flange respectively, so that the mechanism shaft needs to pass through two flanges, and the mechanism shaft needs to be connected between the two flanges with a coupling. The entire connection structure is complicated and the installation is relatively cumbersome. This sealing method will increase the depth of the mechanism cover and cannot be flush with the lower door panel, and the installation work efficiency is low. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the problem in the prior art that the air box and the mechanism cover are sealed with two flanges for connecting the mechanism shaft, and the mechanism shaft is connected between the two flanges with a coupling, and the entire connection structure is complicated, the installation is cumbersome and the efficiency is low.

[0004] To solve the above technical problems, the utility model provides a mechanism shaft seal installation structure, including an air box, a mechanism cover and a mechanism shaft, a sealing flange for the mechanism shaft seal to pass through is arranged between the air box and the mechanism cover, the mechanism cover includes a base plate fixedly connected to the outer wall of the air box, and a connecting protrusion extending on the bottom plate on the side away from the air box, and a first axial hole for connecting the sealing flange that passes through the base plate and the connecting protrusion, at least one first sealing ring is arranged between the connecting protrusion and the sealing flange, the air box is provided with a second axial hole corresponding to the first axial hole for connecting the sealing flange, and at least one second sealing ring is arranged around the second axial hole between the sealing flange and the air box.

[0005] As a preferred solution, the sealing flange includes a limiting boss that cooperates and abuts against the outer wall of the air box. The limiting boss is in a ring shape and surrounds the outside of the second axial hole, so that the second sealing ring is squeezed between the limiting boss and the air box.

[0006] As a preferred solution, the limiting boss is provided with a second annular groove suitable for installing a second sealing ring.

[0007] As a preferred embodiment, the connecting protrusion is a sealing sleeve integrally formed or fixedly connected to the side of the base plate facing away from the air box, the first axial hole is opened on the base plate and extends through the sealing sleeve, and the sealing sleeve extends a set distance along the axial direction of the first axial hole.

[0008] As a preferred embodiment, the sealing flange includes a first axial end and a second axial end respectively extending and connected to both sides of the limiting boss, the first axial end is matched and accommodated in the sealing sleeve through a first axial hole, the second axial end penetrates into the air box through a second axial hole, and a first annular groove suitable for installing a first sealing ring is provided on the outer wall of the first axial end.

[0009] As a preferred solution, a clearance step opposite to the limiting boss is formed between the sealing sleeve and the bottom plate, and a gap is left between the clearance step and the limiting boss.

[0010] As a preferred solution, a threaded structure is provided on the outer wall of the second shaft end, and is fixedly connected to a threaded sleeve arranged in the air box through the threaded structure.

[0011] As a preferred solution, at least one third sealing ring is arranged between the mechanism shaft and the sealing flange, and a third annular groove suitable for installing the third sealing ring is arranged on the mechanism shaft or the sealing flange.

[0012] As a preferred solution, the sealing flange includes a deep groove ball bearing and a lip seal ring sleeved on the mechanism shaft, and the deep groove ball bearing and the lip seal ring are arranged in the inner cavity of the first shaft end from the outside to the inside.

[0013] As a preferred solution, the sealing flange further includes a copper sleeve arranged in the inner cavity of the second shaft end.

[0014] Compared with the prior art, the technical solution of the utility model has the following advantages:

[0015] 1. In the mechanism shaft seal installation structure provided by the utility model, according to the sealing flange being installed between the bottom plate of the mechanism cover and the air box, a first axial hole penetrating the connecting protrusion is provided on the bottom plate, and a second axial hole is provided on the air box correspondingly, the sealing flange is installed in the first axial hole and the second axial hole, and the first axial hole position is sealed and surrounded by a first sealing ring arranged between the sealing flange and the connecting protrusion, thereby ensuring a sealed connection between the bottom plate of the mechanism cover and the sealing flange, and at the same time, according to the sealing flange being fitted against the outer wall of the air box during installation, the second axial hole position is sealed and surrounded by a second sealing ring arranged between the sealing flange and the air box, thereby ensuring a sealed connection between the air box and the sealing flange, such an installation design only requires one flange for sealing installation between the mechanism cover and the air box, and will not increase the depth of the mechanism chamber, and the operating mechanism is independently sealed in the mechanism cover, so that the mechanism shaft only needs to be sealed through the sealing flange to be connected to the switch body in the air box, which simplifies the installation structure, makes the installation connection convenient and quick, improves the installation efficiency, thereby also realizing the requirement of independent sealing installation of the operating mechanism, and improving the product protection level.

[0016] 2. In the mechanism shaft seal installation structure provided by the utility model, the sealing flange includes a limiting boss that cooperates and abuts against the outer wall of the air box, and a second annular groove suitable for installing a second sealing ring is arranged on the limiting boss, and the second annular groove plays a positioning role for the second sealing ring between the limiting boss and the air box. With this structural arrangement, when the sealing flange is installed, the limiting boss will be driven to abut against the outer wall of the air box, so that the limiting boss and the outer wall of the air box cooperate to press and contact the second sealing ring toward each other, thereby realizing the sealing installation between the sealing flange and the air box.

[0017] 3. In the mechanism shaft seal installation structure provided by the utility model, according to the connecting protrusion, a sealing sleeve is fixed on the side of the base plate facing away from the air box, and a first axial hole is opened on the base plate and extends through the sealing sleeve, so that the first axial end of the sealing flange is accommodated in the sealing sleeve, and a first sealing ring is arranged between the sealing sleeve and the first axial end. By arranging the sealing sleeve, the contact area with the sealing flange in the axial direction can be increased, and the first sealing ring can be stably and reliably arranged between the sealing sleeve and the first axial end, so as to realize the sealing installation of the sealing flange on the base plate, thereby achieving the sealing level required by the design and enhancing the connection structure strength of the sealing flange in the first axial hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the drawings required for use in the specific implementation or the description of the prior art will be briefly introduced below.

[0019] Figure 1 It is a schematic diagram of the installation of the mechanism shaft seal installation structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the split structure of the mechanism shaft seal installation structure of the utility model;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the mechanism shaft and the sealing flange of the utility model;

[0022] Figure 4 It is a cross-sectional structural diagram of the mechanism shaft and the sealing flange of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the sealing sleeve on the bottom plate of the utility model.

[0024] Explanation of the accompanying drawings: 1. Air box; 11. Second axial hole; 2. Mechanism cover; 21. Base plate; 22. First axial hole; 23. Gap; 3. Mechanism shaft; 4. Sealing flange; 41. Limiting boss; 42. First shaft end; 43. Second shaft end; 44. Deep groove ball bearing; 45. Lip seal ring; 46. Copper sleeve; 5. First seal ring; 6. Second seal ring; 7. Third seal ring; 8. Connecting protrusion. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example

[0029] The present embodiment is described in detail below with reference to the accompanying drawings:

[0030] This embodiment provides Figure 1-5A mechanism shaft seal installation structure shown in the figure includes an air box 1, a mechanism cover 2 and an operating mechanism arranged in the mechanism cover 2, the operating mechanism has a mechanism shaft that penetrates into the air box for connecting to a switch body, a sealing flange 4 is arranged between the air box 1 and the mechanism cover 2 for the mechanism shaft 3 of the operating mechanism to pass through in a sealed manner, the mechanism cover 2 includes a bottom plate 21 fixedly connected to the outer wall of the air box 1, and a connecting protrusion 8 extending on the bottom plate 21 on the side away from the air box 1, and a first axial hole 22 that passes through the bottom plate 21 and the connecting protrusion 8 for connecting to the sealing flange 4, at least one first sealing ring 5 is arranged between the connecting protrusion 8 and the sealing flange 4, the air box 1 is provided with a second axial hole 11 corresponding to the first axial hole 22 for connecting to the sealing flange 4, and at least one second sealing ring 6 is arranged around the second axial hole 11 between the sealing flange 4 and the air box 1.

[0031] The above implementation is the core technical solution of this embodiment. The sealing flange 4 is installed between the bottom plate 21 of the mechanism cover 2 and the air box 1. A first axial hole 22 penetrating the connecting protrusion 8 is provided on the bottom plate 21, and a second axial hole 11 is provided on the air box 1. The sealing flange 4 is installed in the first axial hole 22 and the second axial hole 11. The first sealing ring 5 provided between the sealing flange 4 and the connecting protrusion 8 seals and surrounds the first axial hole 22, thereby ensuring a sealed connection between the bottom plate 21 of the mechanism cover 2 and the sealing flange 4. At the same time, the sealing flange 4 is fitted against the outer wall of the air box 1 when installed. The second axial hole 11 is sealed and surrounded by a second sealing ring 6 arranged between the sealing flange 4 and the air box 1, thereby ensuring a sealed connection between the air box 1 and the sealing flange 4. In this way, the installation design only requires one flange for sealing installation between the mechanism cover 2 and the air box 1, and will not increase the depth of the mechanism chamber. In addition, the operating mechanism is independently sealed in the mechanism cover 2, so that the mechanism shaft only needs to seal through the sealing flange to be connected to the switch body in the air box, which simplifies the installation structure, makes the installation connection convenient and quick, and improves the installation efficiency, thereby also realizing the requirement of independent sealed installation of the operating mechanism and improving the product protection level.

[0032] Combine the following Figure 1-5 The specific setting method of the sealing flange is described in detail:

[0033] The sealing flange 4 includes a limiting boss 41 that cooperates and abuts against the outer wall of the air box 1. The limiting boss 41 is in a ring shape and surrounds the outside of the second axial hole 11, so that the second sealing ring 6 is squeezed between the limiting boss 41 and the air box 1, wherein the limiting boss 41 is provided with a second annular groove suitable for installing the second sealing ring 6, and the second annular groove plays a positioning and installation role for the second sealing ring 6 between the sealing flange 4 and the air box 1. With this structural arrangement, when the sealing flange 4 is installed, the limiting boss 41 will be driven to abut against the outer wall of the air box, so that the limiting boss 41 and the outer wall of the air box cooperate to press and contact the second sealing ring 6 toward each other, thereby forming a sealing joint surface between the limiting boss 41 and the outer wall of the air box 1 that seals and surrounds the second axial hole 11, so as to realize the sealed installation between the sealing flange 4 and the air box 1.

[0034] It is further preferred that the connection protrusion 8 is a sealing sleeve integrally formed or fixedly connected to the side of the bottom plate 21 facing away from the air box 1, the first axial hole 22 is opened on the bottom plate 21 and extends through the sealing sleeve, and the sealing sleeve extends along the axial direction of the first axial hole 22 for a set distance. Correspondingly, the sealing flange 4 includes a first axial end 42 and a second axial end 43 respectively extending and connected to both sides of the limiting boss 41, the first axial end 42 is matched and accommodated in the sealing sleeve through the first axial hole 22, the second axial end 43 penetrates into the air box 1 through the second axial hole 11, and the outer wall of the first axial end 42 is provided with a first annular groove suitable for installing the first sealing ring 5. The advantage of such a design is that since the front plate of the air box will deform when inflated, if the sealing ring is set in the hole opened in the bottom plate to cooperate with the flange, it is difficult to achieve complete contact, and the contact surface is small, and the sealing level IP67 required by the design cannot be achieved. To this end, by providing a sealing sleeve, the contact area with the sealing flange 4 in the axial direction can be increased, and the first sealing ring 5 can be stably and reliably arranged between the sealing sleeve and the first shaft end 42, so as to realize the sealing installation of the sealing flange 4 on the base plate 21, achieve the sealing level required by the design, and at the same time enhance the connection structure strength of the sealing flange 4 in the first shaft hole.

[0035] like Figure 1 As shown, a clearance step opposite to the limiting boss 41 is formed between the sealing sleeve and the bottom plate 21, and a gap 23 is left between the clearance step and the limiting boss 41. By leaving a small gap 23, it is ensured that the bottom plate 21 and the air box 1 can be in close contact during installation, so as to avoid the bottom plate being blocked by the position of the limiting boss and resulting in a loose connection with the air box.

[0036] In order to reliably realize the installation and fixation of the sealing flange, a threaded structure is provided on the outer wall of the second shaft end 43, and the switch body in the air box 1 is provided with a threaded sleeve threadedly connected to the second shaft end 43, that is, the sealing flange 4 is inserted into the air box 1 and is fixedly connected to the threaded sleeve through the threaded structure. Such installation can significantly improve the strength and wear resistance of the threaded connection to prevent loosening, thereby ensuring the sealing of the sealing flange fixedly installed between the mechanism cover and the air box.

[0037] In this embodiment, combined with Figure 3-4 As shown, at least one third sealing ring 7 is arranged between the mechanism shaft 3 and the sealing flange 4, and a third annular groove suitable for installing the third sealing ring 7 is arranged on the mechanism shaft 3 or the sealing flange 4. The third annular groove plays a role in positioning and installing the third sealing ring 7 between the mechanism shaft 3 and the sealing flange 4, and the dynamic sealing connection between the mechanism shaft 3 and the sealing flange 4 is realized through the third sealing ring 7. It is further preferably arranged that the sealing flange 4 includes a deep groove ball bearing 44 and a lip sealing ring 45 sleeved on the mechanism shaft 3, and the deep groove ball bearing 44 and the lip sealing ring 45 are arranged in the inner cavity of the first shaft end 42 from the outside to the inside, and the deep groove ball bearing 44 can be used to bear radial loads and reduce rolling friction, thereby playing a role in supporting and transmitting loads, and the lip sealing ring 45 is used as a sealing element and utilizes its elastic deformation characteristics to make it fit the sealed part tightly, thereby further improving the sealing effect between the sealing flange 4 and the mechanism shaft 3. The sealing flange 4 also includes a copper sleeve 46 disposed in the inner cavity of the second shaft end 43. The copper sleeve has high strength and hardness and can withstand a large load. The copper sleeve reduces friction, vibration, corrosion, and noise on the mechanism shaft.

[0038] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A mechanism shaft seal installation structure, comprising an air box (1), a mechanism cover (2) and a mechanism shaft (3), wherein a sealing flange (4) is provided between the air box (1) and the mechanism cover (2) for the mechanism shaft (3) to pass through in a sealed manner, and wherein: The mechanism cover (2) comprises a bottom plate (21) fixedly connected to the outer wall of the air box (1), a connecting protrusion (8) extending from the bottom plate (21) on the side facing away from the air box (1), and a first axial hole (22) penetrating the bottom plate (21) and the connecting protrusion (8) for connecting the sealing flange (4), at least one first sealing ring (5) being arranged between the connecting protrusion (8) and the sealing flange (4), the air box (1) being provided with a second axial hole (11) for connecting the sealing flange (4) corresponding to the first axial hole (22), and at least one second sealing ring (6) being arranged around the second axial hole (11) between the sealing flange (4) and the air box (1).

2. The mechanism shaft seal installation structure according to claim 1, characterized in that: The sealing flange (4) comprises a limiting boss (41) that cooperates and abuts against the outer wall of the air box (1); the limiting boss (41) is in a ring shape and surrounds the outside of the second axial hole (11), so that the second sealing ring (6) is squeezed between the limiting boss (41) and the air box (1).

3. The mechanism shaft seal installation structure according to claim 2, characterized in that: The limiting boss (41) is provided with a second annular groove suitable for installing a second sealing ring (6).

4. The mechanism shaft seal installation structure according to any one of claims 1 to 3, characterized in that: The connecting protrusion (8) is a sealing sleeve integrally formed or fixedly connected to the side of the base plate (21) facing away from the air box (1); the first axial hole (22) is opened on the base plate (21) and extends through the sealing sleeve; the sealing sleeve extends a set distance along the axial direction of the first axial hole (22).

5. The mechanism shaft seal installation structure according to claim 4, characterized in that: The sealing flange (4) comprises a first shaft end (42) and a second shaft end (43) respectively extending and connected to both sides of the limiting boss (41); the first shaft end (42) is matched and accommodated in the sealing sleeve through the first shaft hole (22); the second shaft end (43) penetrates into the air box (1) through the second shaft hole (11); and a first annular groove suitable for installing a first sealing ring (5) is provided on the outer wall of the first shaft end (42).

6. The mechanism shaft seal installation structure according to claim 5, characterized in that: A clearance step opposite to the limiting boss (41) is formed between the sealing sleeve and the bottom plate (21), and a gap (23) is left between the clearance step and the limiting boss (41).

7. The mechanism shaft seal installation structure according to claim 5, characterized in that: A threaded structure is provided on the outer wall of the second shaft end (43), and the switch body in the air box (1) is provided with a threaded sleeve threadably connected to the second shaft end (43).

8. The mechanism shaft seal installation structure according to claim 1, characterized in that: At least one third sealing ring (7) is arranged between the mechanism shaft (3) and the sealing flange (4), and a third annular groove suitable for installing the third sealing ring (7) is arranged on the mechanism shaft (3) or the sealing flange (4).

9. The mechanism shaft seal installation structure according to claim 8, characterized in that: The sealing flange (4) comprises a deep groove ball bearing (44) and a lip seal ring (45) sleeved on the mechanism shaft (3); the deep groove ball bearing (44) and the lip seal ring (45) are arranged in an inner cavity of the first shaft end (42) from the outside to the inside.

10. The mechanism shaft seal installation structure according to claim 9, characterized in that: The sealing flange (4) further comprises a copper sleeve (46) arranged in the inner cavity of the second shaft end (43).

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