Floating seal split mount tool

Abstract

The utility model discloses a kind of floating seal split type installation tools, comprising: pedestal, positioning screw, installation O-ring, fixed distance plate, the appearance of pedestal is annular section, the top end surface of pedestal is provided with rectangular groove, rectangular groove includes: with the coaxial first inner periphery, second inner periphery, third inner periphery and inner plane of annular section, a plurality of threaded holes are provided on third inner periphery, positioning screw is installed in threaded hole, installation O-ring is located in second inner periphery inside, fixed distance plate is located in top end surface side portion.The utility model can improve the installation efficiency of floating seal, especially large size floating seal.

Description

Technical Field

[0001] This utility model belongs to the field of floating oil seal maintenance technology, specifically relating to a floating seal split installation tool. Background Technology

[0002] Floating oil seal is a common name for floating seal. It belongs to the category of mechanical seals among dynamic seals. It has excellent sealing performance in harsh working environments such as those with coal dust, mud, sand, water, and gas. It is a compact mechanical seal and is mainly used in low-speed, heavy-load applications.

[0003] A floating oil seal consists of two metal rings and two O-rings, which are installed face-to-face in separate grooves in the housing and centered. After proper installation of the housings on both sides, the axial force generated by the compression deformation of the O-rings presses the two metal rings together to achieve a seal. Its working principle is that a pair of rubber rings, supported by the metal rings, form a closed space with the cavity (but do not contact the shaft). During rotation, the two ground surfaces of the metal rings fit tightly and slide relative to each other, ensuring smooth operation while effectively sealing off external dust, water, sludge, etc., protecting the internal lubricating grease from leakage. The sealing principle of the floating oil seal is that the two floating rings, due to the axial compression deformation of the O-rings, generate a pressing force on the sealing end faces of the floating rings. As the sealing end faces wear evenly, the elastic energy stored in the O-rings is gradually released, thus providing axial compensation.

[0004] For large-sized floating seals, it is difficult to install them into the trench, which affects subsequent maintenance and upkeep. Utility Model Content

[0005] The purpose of this utility model is to provide a separate installation tool for floating seals, which can improve the installation efficiency of floating seals, especially large-size floating seals.

[0006] To achieve the above objectives, the technical solution used in this utility model is as follows:

[0007] The floating seal split-type installation tool includes: a base, positioning screws, an O-ring, and a spacer plate. The base is annular in shape, and a rectangular groove is provided on the top end face of the base. The rectangular groove includes a first inner circumferential surface, a second inner circumferential surface, a third inner circumferential surface, and an inner plane, all coaxial with the annular segment. The inner plane is parallel to the top end face. The first, second, and third inner circumferential surfaces are parallel to each other and perpendicular to the inner plane. The radius of the third inner circumferential surface is smaller than that of the first inner circumferential surface, and the radius of the second inner circumferential surface is larger than that of the first inner circumferential surface. Multiple threaded holes are provided on the third inner circumferential surface, and the positioning screw is installed in the threaded holes. The O-ring is located inside the second inner circumferential surface, and the spacer plate is located on the side of the top end face.

[0008] Furthermore, the positioning screw includes a head and a screw rod, the end of the screw rod being connected to the bottom of the head, the outer circumferential surface of the head being knurled, and the screw rod being installed in a threaded hole.

[0009] Furthermore, the O-ring is installed as a ring-shaped elastomer with a circular cross-section.

[0010] Furthermore, the spacer plate is a cuboid with a rectangular cross-section.

[0011] Furthermore, it includes 3 bases, 6 positioning screws, 1 mounting O-ring, and 3 spacer plates.

[0012] Furthermore, the diameter of the first inner circumferential surface is equal to the diameter of the outer circumferential surface of the metal ring of the floating seal assembly.

[0013] The technical effects of this utility model include:

[0014] The floating seal installation tools described above are simple in structure and easy to operate, which can improve the installation efficiency of floating seals, especially large-size floating seals. Attached Figure Description

[0015] Figure 1a This is an exploded view of the floating sealing assembly in this utility model;

[0016] Figure 1b yes Figure 1a Enlarged view of point B in the middle.

[0017] Figure 2a This is a cross-sectional view of the floating sealing assembly after installation in this utility model;

[0018] Figure 2b yes Figure 2a Enlarged view at point B;

[0019] Figure 2c yes Figure 2b An enlarged view of the rotating housing.

[0020] Figure 3a This is a schematic diagram of the base structure in this utility model;

[0021] Figure 3b This is the front view of Figure 2;

[0022] Figure 3c yes Figure 3b Cross-sectional view;

[0023] Figure 4 This is a schematic diagram of the structure for installing the O-ring in this utility model;

[0024] Figure 5 This is a schematic diagram of the positioning screw in this utility model;

[0025] Figure 6 This is a schematic diagram of the distance plate in this utility model.

[0026] Figure 7 This is an isometric view of the floating seal assembly installed on the floating seal split-type installation tool in this utility model;

[0027] Figure 8 yes Figure 7 A cross-sectional view.

[0028] Figure 9 This is an isometric view of the floating seal split-type installation tool of this utility model placed on the rotating housing;

[0029] Figure 10 yes Figure 9 A cross-sectional view.

[0030] Figure 11 This is an isometric view of the floating sealing assembly pressed into the housing in this utility model;

[0031] Figure 12 yes Figure 10 Enlarged sectional view of the cross section.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Static shell;

[0034] 2-Rotating housing, 21-Groove, 21a-Mounting arc surface, 21b-Transition arc surface, 21d-Inner conical surface, 22-End face;

[0035] 3-Bearings;

[0036] 4-Floating seal assembly, 41-Metal ring, 41a-Sealing end face, 41b-Rear bevel, 41c-Outer conical surface, 41d-Throat arc surface, 41e-Outer peripheral surface, 41f-Inner conical surface, 42-O-ring;

[0037] 5-End cap; 6-Fastening component; 7-Sealing ring;

[0038] 9-Installation tool, 91-Base, 91a-First inner circumferential surface, 91b-Second inner circumferential surface, 91c-Third inner circumferential surface, 91d-Inner plane, 91f-Threaded hole, 91g-End face, 92-Positioning screw, 92a-Head, 92b-Screw, 93-Installation O-ring, 94-Distance plate.

[0039] S1 - Internal cavity space. Detailed Implementation

[0040] The following description fully illustrates specific embodiments of the present invention to enable those skilled in the art to practice and reproduce it.

[0041] like Figure 1a The diagram shown is an exploded view of the floating sealing component 4 in this invention; as shown... Figure 1b As shown, is Figure 1a Enlarged view of point B in the middle.

[0042] The composition of the floating sealing assembly 4 and the structure of the metal ring 41 are described below.

[0043] The floating sealing assembly 4 includes two metal rings 41 and two O-rings 42, which are symmetrical in structure. The metal rings 41 and O-rings 42 are annular structures extending in the circumferential direction. The side of the metal rings 41 is provided with an annular sealing groove, and the O-rings 42 are installed in the annular sealing groove.

[0044] Two floating sealing assemblies 4 are arranged side by side and in contact with each other. The contact surface is the sealing end face 41a, and the bottom is the inner conical surface 41f. The annular sealing groove includes an outer peripheral surface 41e, a rear inclined surface 41b, an outer conical surface 41c, and a throat arc surface 41d, which are connected sequentially. The outer peripheral surface 41e is connected to the sealing end face 41a.

[0045] The diameter of the outer conical surface 41c gradually increases as it approaches the sealing end face 41a, while the diameter of the inner conical surface 41f gradually decreases as it approaches the sealing end face 41a. The throat arc surface 41d is tangent to the outer conical surface 41c. Furthermore, the throat arc surface 41d is a concave arc pointing inward, meaning that the lowest point of the throat arc surface 41d is also the lowest point of the annular sealing groove.

[0046] like Figure 2a The figure shown is a cross-sectional view of the floating sealing component 4 after installation in this utility model; as shown Figure 2b As shown, is Figure 2a An enlarged view at point B; as shown Figure 2c As shown, is Figure 2b An enlarged view of the rotating housing 1.

[0047] Since the floating seal is a symmetrical type, the grooves 21 of the rotating housing 2 and the stationary housing 1 are opposite to each other. The floating seal assembly 4 is installed in the groove 21. The grooves 21 on the rotating housing 2 and the stationary housing 1 for installing the floating seal are exactly the same. Therefore, the grooves of the rotating housing 2 will be described only.

[0048] The rotating housing 2 is provided with a groove 21 for mounting the floating sealing assembly 4. The groove 21 includes: a mounting arc surface 21a, a transition arc surface 21b, and an inner conical surface 21d, which are connected in sequence.

[0049] The end face 22 of the rotating housing 2 is tangent to the mounting arc surface 21a and is a concave arc protruding inward. The inner conical surface 21d gradually decreases in diameter as it moves away from the end face 22, and the transition arc surface 21b is tangent to both the mounting arc surface 21a and the inner conical surface 21d. Correspondingly, the inner diameter of the mounting arc surface 21a is smaller than the outer diameter of the transition arc surface 21b, that is, the groove 21 has a diameter-contracting shape near the end face 22.

[0050] The rotating housing 2 is supported on the stationary housing 1 in a rotatable manner by means of bearings 3. The end cap 5 is mounted on one side of the rotating housing 2 by means of fastening members 6, and a sealing ring 7 is provided between the end cap 5 and the rotating housing 2. The floating sealing assembly 4 is disposed between the stationary housing 1 and the rotating housing 2. The floating oil seal assembly 4 consists of two metal rings 41 and two O-rings 42, which are installed face-to-face in the grooves 21 of the stationary housing 1 and the rotating housing 2, respectively, and are centered.

[0051] O-rings 42 contact the inner conical surface 21d and the outer conical surface 41c respectively. The axial force generated by the compression deformation of the O-rings 42 presses the two metal rings 41 together, and the sealing end faces 41a of the two metal rings 41 contact each other and are pressed together. This isolates the inner cavity space S1 from the outside, thereby achieving a sealing effect.

[0052] Simultaneously, the compressed and deformed O-ring 42 generates friction with the inner conical surface 21d of the shell groove and the outer conical surface 41c of the metal ring, thereby enabling the rotating shell 2 and the metal ring 41 in contact with the O-ring 42 to rotate synchronously. That is, the O-ring 42 and the metal ring 41 installed in the stationary shell 1 remain stationary, while the O-ring 42 and the metal ring 41 installed in the rotating shell 2 rotate synchronously with the rotating shell 2.

[0053] Accordingly, during installation, the floating sealing assembly 4 requires the independent installation of an O-ring 42 and a metal ring 41 in both the stationary housing 1 and the rotating housing 2. After the stationary housing 1 and the rotating housing 2 are finally installed, the O-ring 42 is further compressed to achieve the aforementioned sealing effect.

[0054] The grooves 21 for installing the floating seal on the rotating housing 2 and the stationary housing 1 are exactly the same. Accordingly, the method for installing the floating seal assembly 4 in the rotating housing 2 and the stationary housing 1 is exactly the same. Therefore, the following description focuses only on the rotating housing 2 and describes a specific embodiment of the installation tool.

[0055] like Figure 3a The diagram shown is a structural schematic of the base 91 in this utility model; as shown... Figure 3b The image shown is the front view of Figure 2; as shown... Figure 3c As shown, is Figure 3b Cross-sectional view; such as Figure 4The diagram shown is a schematic representation of the structure for installing the O-ring 93 in this utility model; as shown... Figure 5 The diagram shown is a structural schematic of the positioning screw 92 in this utility model; as shown... Figure 6 The diagram shown is a structural schematic of the spacer plate 94 in this utility model.

[0056] The floating seal split installation tool 9 includes: base 91, positioning screw 92, installation O-ring 93, and spacer plate 94.

[0057] The base 91 is an annular segment. The top of the base 91 is provided with a top end face 91g. The top end face 91g is provided with a rectangular groove. The rectangular groove includes a first inner circumferential surface 91a, a second inner circumferential surface 91b, a third inner circumferential surface 91c, and an inner plane 91d, which are coaxial with the annular segment. The inner plane 91d is parallel to the top end face 91g. The first inner circumferential surface 91a, the second inner circumferential surface 91b, and the third inner circumferential surface 91c are parallel to each other. The first inner circumferential surface 91a, the second inner circumferential surface 91b, and the third inner circumferential surface 91c are perpendicular to the inner plane 91d. The radius of the third inner circumferential surface 91c is smaller than the radius of the first inner circumferential surface 91a, and the radius of the second inner circumferential surface 91b is larger than the radius of the first inner circumferential surface 91a. Multiple threaded holes 91f are provided on the third inner circumferential surface 91c.

[0058] The first inner circumferential surface 91a of the base 91 has the same diameter as the outer circumferential surface 41e of the metal ring 41.

[0059] The positioning screw 92 includes a head 92a and a screw 92b, the end of which is connected to the bottom of the head 92a, and the outer circumferential surface of the head 92a is knurled. The screw 92b of the positioning screw 92 is installed in the threaded hole 91f of the base 91.

[0060] The mounting O-ring 93 is a ring-shaped elastic body with a circular cross-section. The mounting O-ring 93 is located inside the second inner circumferential surface 91b.

[0061] The spacer plate 94 is a cuboid with a rectangular cross-section. The spacer plate 94 is located below the top end face 91g.

[0062] In this preferred embodiment, the installation tool 9 has a total of 3 bases 91, one installation O-ring 93, 6 positioning screws 92, and 3 spacer plates.

[0063] like Figure 7 The image shown is an isometric view of the floating seal assembly 4 installed onto the floating seal split-type installation tool 9 in this utility model; as shown... Figure 8 As shown, is Figure 7 A cross-sectional view.

[0064] The specific steps for using the floating seal split-type installation tool are as follows:

[0065] 1. The base 91 is installed on the metal ring 41 of the floating sealing assembly 4. The first inner circumferential surface 91a of the base 91 contacts the outer circumferential surface 41e of the metal ring 41, and the inner plane 91d of the base 91 contacts the sealing end face 41a of the metal ring 41. The positioning screw 92 is installed into the threaded hole 91f on the base 91. The positioning screw 92 fixes the metal ring 41 in the rectangular groove of the base 91.

[0066] 1.1 Place the metal ring 41 on a horizontal surface with the sealing end face 41a facing downwards. Install the O-ring 93 onto the metal ring 41. Install the O-ring 42 of the floating sealing assembly 4 onto the throat arc surface 41d of the metal ring 41, so that the O-ring 93 is located between the O-ring 42 and the rear inclined surface 41b.

[0067] O-ring 93 is mounted on metal ring 41, positioned between O-ring 42 and rear bevel 41b. Since O-ring 42 is an elastic body, it will slide along the back of metal ring 41 and be confined at the throat arc surface 41d. The metal ring 41 is then flipped so that O-ring 42 faces downwards.

[0068] 1.2 Place the base 91 of the installation tool 9 on the metal ring 41, so that the first inner circumferential surface 91a of the base 91 contacts the outer circumferential surface 41e of the metal ring 41, and the inner plane 91d of the base 91 contacts the sealing end face 41a of the metal ring 41; screw the positioning screw 92 into the threaded hole 91f on the base 91, rotate the head 92a so that the end face of the screw 92b contacts and presses the inner conical surface 41f of the metal ring 41, and fix the metal ring 41 in the rectangular groove of the base 91;

[0069] At this time, the O-ring 93 is surrounded by the rear inclined surface 41b of the metal ring 41, the outer conical surface 41c, the O-ring 42, and the second inner circumferential surface 91b of the base 91. The O-ring 93 restricts the movement of the O-ring 42 along the outer conical surface 41c, thereby fixing the O-ring 42.

[0070] The remaining bases 91 are installed on the metal ring 41 in the same manner at equal intervals.

[0071] like Figure 9 The image shown is an isometric view of the installation tool 9 placed on the rotating housing 2 in this utility model; as shown... Figure 10 As shown, is Figure 9 A cross-sectional view.

[0072] 2. Make the groove 21 of the rotating housing 2 face upward and keep the end face 22 horizontal; place the metal ring 41 with the base 91 on the rotating housing 2, and place the spacer plate 94 between the end face 91g of the base 91 and the end face 22 of the housing.

[0073] Position the rotating housing 2 so that its groove 21 faces upward and its end face 22 remains horizontal.

[0074] The spacer plate 94 ensures that the distance between the O-ring 42 of the floating seal assembly 4 and the groove 21 remains consistent. The metal ring 41 is adjusted appropriately so that the center of the floating seal assembly 4 coincides with the center of the groove 21.

[0075] Anhydrous alcohol is sprayed between groove 21 and O-ring 42 to achieve lubrication between the two.

[0076] like Figure 11 The image shown is an isometric view of the floating sealing component 4 pressed into the housing in this invention; as shown... Figure 12 As shown, is Figure 10 Enlarged sectional view of the cross section.

[0077] 3. After the distance is determined, remove the spacer plate 94 and press the base 91 down so that the end face 91g contacts the end face 22 of the rotating housing 2. The metal ring 41 applies downward pressure to the O-ring 93 with the help of the rear inclined surface 41b. The O-ring 93 presses down on the O-ring 42, and the O-ring 42 enters the groove 21.

[0078] Since the mounting arc surface 21a at the connection position between the groove 21 and the end face 22 is an inwardly protruding arc surface, the metal ring 41 and the O-ring 42 contact the mounting arc surface 21a and are supported on it.

[0079] Press down firmly on the bases 91 that are evenly distributed on the metal ring 41 until the end faces 91g of all the bases are in contact with the end face 22.

[0080] During the downward pressing process, the pressure acting on the base 91 is applied to the sealing end face 41a through the inner plane 91d, that is, to the metal ring 41. The metal ring 41 applies downward pressure to the mounting O-ring 93 with the help of the rear inclined surface 41b. Furthermore, since the mounting O-ring 93 is in a closed space, the O-ring 93 presses the O-ring 42 downward until it crosses the mounting arc surface 21a of the groove 21 and enters the groove 21.

[0081] 4. Loosen the positioning screw 92, remove the base 91 and install the O-ring 93; the O-ring 42 is elastically constrained at the throat arc surface 41d of the metal ring 41, and the metal ring 41 is installed in the groove 21 along with the O-ring 42.

[0082] Since the O-ring 42 is an elastic body, it will move within the groove 21 until it is confined to the transition arc surface 21b. Because the mounting arc surface 21a protrudes inward, the O-ring 42 cannot pass over it due to its own elasticity; therefore, the O-ring 42 is installed in the groove 21. Simultaneously, since the O-ring 42 is also confined at the throat arc surface 41d of the metal ring 41, the metal ring 41 is also installed in the groove 21. At this point, the floating seal assembly 4 is installed.

[0083] The terminology used in this invention is descriptive and exemplary, and not restrictive. Since this invention can be embodied in various forms without departing from the spirit or essence of the technical solution, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A floating seal split-type installation tool, characterized in that, include: The base consists of a base, positioning screws, an O-ring, and a spacer plate. The base is annular in shape, and a rectangular groove is provided on the top end face of the base. The rectangular groove includes a first inner circumferential surface, a second inner circumferential surface, a third inner circumferential surface, and an inner plane, all coaxial with the annular segment. The inner plane is parallel to the top end face. The first, second, and third inner circumferential surfaces are parallel to each other and perpendicular to the inner plane. The radius of the third inner circumferential surface is smaller than that of the first inner circumferential surface, and the radius of the second inner circumferential surface is larger than that of the first inner circumferential surface. Multiple threaded holes are provided on the third inner circumferential surface, and the positioning screw is installed in the threaded holes. The O-ring is located inside the second inner circumferential surface, and the spacer plate is located on the side of the top end face.

2. The floating seal split-type installation tool as described in claim 1, characterized in that, The positioning screw includes a head and a shank, the end of which is connected to the bottom of the head. The outer circumferential surface of the head is knurled, and the shank is installed in a threaded hole.

3. The floating seal split-type installation tool as described in claim 1, characterized in that, The O-ring is a ring-shaped elastic body with a circular cross-section.

4. The floating seal split-type installation tool as described in claim 1, characterized in that, The spacer plate is a cuboid with a rectangular cross-section.

5. The floating seal split-type installation tool as described in claim 1, characterized in that, It includes 3 bases, 6 positioning screws, 1 mounting O-ring and 3 spacer plates.

6. The floating seal split-type installation tool as described in claim 1, characterized in that, The diameter of the first inner circumferential surface is equal to the diameter of the outer circumferential surface of the metal ring of the floating seal assembly.

Images