Single-end-face mechanical sealing element

Abstract

The utility model discloses a single-end-face mechanical sealing piece, which belongs to the technical field of sealing devices, and comprises a shaft core, a spring seat, a push ring, a movable ring and a protective cover, the device is novel in design and ingenious, the protective cover is arranged between the spring seat and the push ring and located outside the first spring, the protective cover is made of an elastic material and has a telescopic effect, the protective cover can be automatically retracted according to the actual use condition, meanwhile, the first spring can be effectively protected, and the service life of the first spring is prolonged. The first spring is arranged on the protective cover, oxidation caused by air, humidity and the like due to the fact that the first spring is exposed outside is reduced, and therefore the service life of the first spring is prolonged, and the sealing performance of an O-shaped sealing ring is improved. And a second spring is extruded to enable a round hole in a movable plate to be separated from a limiting rod, so that the protective cover can be rapidly taken down, subsequent rapid installation of the protective cover is facilitated, the using effect is improved, and the practicability of the device is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of sealing devices, and in particular to a single-end mechanical seal. Background Art

[0002] The published patent with authorization announcement number CN214404693U discloses a pre-positioning mechanical seal, which includes a compression assembly, which includes a spring seat and a push ring. The spring seat is provided with a positioning hole and a plug-in hole. The push ring includes a horizontal section and a vertical section. The vertical section is arranged at one end of the horizontal section away from the spring seat, and the horizontal section is plugged into the plug-in hole. The horizontal section is provided with a limit hole aligned with the positioning hole, which has the effect of improving the work efficiency of the staff during installation.

[0003] In the pre-positioned mechanical seal in the above patent, the spring portion is exposed to the outside for a long time, which causes the spring to oxidize and deform due to factors such as air and humidity. This not only accelerates the service life of the spring, but also reduces the sealing performance of the O-ring when the elastic force of the spring is affected to a certain extent.

[0004] To this end, the present application proposes a single-end mechanical seal. Utility Model Content

[0005] The present application proposes a single-end mechanical seal to solve the problems raised in the above-mentioned background technology; by arranging a protective cover between the spring seat and the push ring and outside the first spring, the protective cover is made of elastic material and has a retractable function. It can not only be scaled according to actual usage, but also effectively protect the first spring, reduce the first spring from being exposed to the outside and oxidized due to air, humidity, etc., thereby increasing the service life of the first spring and improving the sealing performance of the O-ring. By arranging an installation mechanism on the protective cover, when the first spring needs to be replaced and inspected, the movable plate can be moved, and the circular hole on the movable plate can be disengaged from the limit rod by squeezing the second spring, so that the protective cover can be quickly removed and the subsequent quick installation of the protective cover is facilitated, thereby improving the use effect and greatly enhancing the practicality of the device.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] A single-end mechanical seal includes a shaft core, a spring seat, a push ring, a dynamic ring and a protective cover. The spring seat, push ring and dynamic ring are all arranged outside the shaft core, and the push ring is located between the spring seat and the dynamic ring. A mounting mechanism is provided on both of the protective covers. The mounting mechanism includes a mounting block, a mounting groove, a movable groove, a limit groove, a limit rod, a second spring, a movable plate and a circular hole. Each of the mounting blocks is fixedly connected to the protective cover. A mounting groove and a movable groove are opened inside each of the mounting blocks, and each of the mounting grooves and the movable groove is connected.

[0008] As a preferred embodiment, a plurality of limiting grooves are formed inside the two push rings, a limiting rod is fixedly connected to the inside of each limiting groove, a second spring is provided inside each mounting groove, one end of each second spring is fixedly connected to a movable plate, and the bottom of each movable plate extends into the limiting groove;

[0009] By arranging a mounting mechanism on the protective cover, the protective cover can be quickly removed and the protective cover can be quickly installed later, thereby improving the use effect and thus enhancing the practicality of the device.

[0010] As a preferred embodiment, a circular hole is provided inside each of the movable plates, and one end of each of the limiting rods passes through the circular hole and penetrates the interior of the movable plate;

[0011] By arranging an installation mechanism on the protective cover, when the first spring needs to be replaced and inspected, the movable plate can be moved, and the circular hole on the movable plate can be disengaged from the limit rod by squeezing the second spring, so that the protective cover can be quickly removed and the subsequent quick installation of the protective cover is facilitated, thereby improving the use effect and enhancing the practicality of the device.

[0012] As a preferred embodiment, a fixing hole is formed inside the spring seat, a fastening screw is connected to the internal thread of the fixing hole, and the spring seat is abutted against the shaft core through the fixing hole and the fastening screw. A positioning hole is formed inside the spring seat, a positioning screw is connected to the internal thread of the positioning hole, and one end of the positioning screw extends into the interior of the push ring;

[0013] During the installation of the mechanical seal parts, the positioning screw is threadedly connected to the positioning hole and passes through the push ring, so that the position of the push ring and the spring seat is fixed on the shaft core, which is convenient for the staff to install quickly and improves the work efficiency. The fixing hole is threadedly connected to the fastening screw and the fastening screw is installed to fasten the spring seat on the shaft core. At the same time, the fastening screw and the fixing hole are easy to disassemble and install and are easy to put into place and can be reused, which is convenient for the staff to use during work, thereby improving the practicality of the device.

[0014] As a preferred embodiment, the push ring includes a horizontal section and a vertical section, the vertical section is arranged on one end of the horizontal section away from the spring seat, and the horizontal section is inserted into the spring seat;

[0015] The first spring exerts a pressing force on the vertical section, so that the vertical section drives the horizontal section to press against the O-ring, thereby ensuring the sealing of the dynamic ring during movement and improving the practicality of the device.

[0016] As a preferred embodiment, a first spring is provided between the spring seat and the push ring, one end of the first spring is connected to the spring seat, and one end of the first spring away from the spring seat abuts against the vertical section;

[0017] When the horizontal section moves horizontally toward the spring seat, the first spring continues to apply an extrusion force toward the vertical section, so that the horizontal section can continue to move toward the dynamic ring after moving toward the spring seat, so that the horizontal section always presses the O-ring into the placement groove, further ensuring the sealing performance at this location, thereby improving the practicality of the device.

[0018] As a preferred embodiment, a placement groove is provided inside the dynamic ring, and an O-ring is provided inside the placement groove;

[0019] When the dynamic ring rotates, the O-ring reduces the possibility of lubricating oil leakage, and the setting of the O-ring makes the installation part between the dynamic ring and the horizontal section compact, which can achieve a better sealing effect, thereby improving the practicality of the device.

[0020] As a preferred embodiment, a transmission hole is opened inside the push ring, a transmission pin is arranged inside the transmission hole, a rotation hole is opened inside the movable ring, and one end of the transmission pin extends into the rotation hole;

[0021] During the rotation of the vertical section and the moving ring, the linear speeds of the end of the vertical section away from the shaft core and the end of the moving ring away from the shaft core are the same, and the two can rotate synchronously, which facilitates the subsequent adjustment of the rotational speed, thereby improving the practicality of the device.

[0022] Beneficial effects of this application:

[0023] 1. This single-end mechanical seal features a protective cover located between the spring seat and the push ring and outside the first spring. The cover is made of an elastic material and is retractable. It can be scaled according to actual usage and effectively protects the first spring, reducing oxidation caused by exposure to air, humidity, and other factors. This increases the service life of the first spring and improves the sealing performance of the O-ring, greatly enhancing the practicality of the device.

[0024] 2. This single-end mechanical seal is equipped with an installation mechanism on the protective cover. When the first spring needs to be replaced and inspected, the movable plate can be moved, and the circular hole on the movable plate can be disengaged from the limit rod by squeezing the second spring. In this way, the protective cover can be quickly removed, and the subsequent rapid installation of the protective cover is facilitated, thereby improving the use effect and greatly enhancing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the interior of the device of this application;

[0026] Figure 2 A schematic diagram of the upper half of the device of the present application;

[0027] Figure 3 For this application Figure 2 Enlarged view of point A in the middle.

[0028] Numbers in the figure: 1. Shaft core; 2. Spring seat; 21. Fixing hole; 22. Fastening screw; 23. Positioning hole; 24. Positioning screw; 3. Push ring; 31. Horizontal section; 32. Vertical section; 4. Moving ring; 5. Protective cover; 50. Mounting mechanism; 51. Mounting block; 52. Mounting slot; 53. Movable slot; 54. Limiting slot; 55. Limiting rod; 56. Second spring; 57. Movable plate; 58. Round hole; 6. First spring; 7. Placement slot; 8. O-ring; 9. Transmission hole; 10. Transmission pin; 11. Rotating hole. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0030] Reference Figure 1-3 A single-end mechanical seal includes a shaft core 1, a spring seat 2, a push ring 3, a dynamic ring 4 and a protective cover 5. The spring seat 2, push ring 3 and dynamic ring 4 are all arranged outside the shaft core 1, and the push ring 3 is located between the spring seat 2 and the dynamic ring 4.

[0031] The two protective covers 5 are both provided with a mounting mechanism 50, which includes a mounting block 51, a mounting slot 52, a movable slot 53, a limiting slot 54, a limiting rod 55, a second spring 56, a movable plate 57 and a circular hole 58. Each mounting block 51 is fixedly connected to the protective cover 5, and a mounting slot 52 and a movable slot 53 are provided inside each mounting block 51. Each mounting slot 52 and the movable slot 53 are connected. A plurality of limiting slots 54 are provided inside the two push rings 3, and a limiting rod 55 is fixedly connected to the inside of each limiting slot 54. A second spring 56 is provided inside each mounting slot 52, and one end of each second spring 56 is fixedly connected to a movable plate 57, and the bottom of each movable plate 57 extends to the inside of the limiting slot 54. By arranging the mounting mechanism 50 on the protective cover 5, the protective cover 5 can be quickly removed, and the subsequent quick installation of the protective cover 5 is facilitated, thereby improving the use effect and thus enhancing the practicality of the device.

[0032] A circular hole 58 is provided inside each movable plate 57, and one end of each limiting rod 55 passes through the inside of the movable plate 57 through the circular hole 58; by arranging the installation mechanism 50 on the protective cover 5, when the first spring 6 needs to be replaced and inspected, the movable plate 57 can be moved, and the circular hole 58 on the movable plate 57 can be separated from the limiting rod 55 by squeezing the second spring 56, so that the protective cover 5 can be quickly removed and the subsequent quick installation of the protective cover 5 is facilitated, thereby improving the use effect and thus enhancing the practicality of the device.

[0033] A fixing hole 21 is provided inside the spring seat 2, and a fastening screw 22 is connected to the internal thread of the fixing hole 21, and the spring seat 2 is abutted against the shaft core 1 through the fixing hole 21 and the fastening screw 22. A positioning hole 23 is provided inside the spring seat 2, and a positioning screw 24 is connected to the internal thread of the positioning hole 23, and one end of the positioning screw 24 extends into the inside of the push ring 3; during the installation of the mechanical sealing parts, the positioning screw 24 is threadedly connected to the positioning hole 23 and passes through the push ring 3, so that the position of the push ring 3 and the spring seat 2 is fixed on the shaft core 1, which is convenient for the staff to install quickly and improves the work efficiency. By threading the fixing hole 21 and the fastening screw 22 and installing the fastening screw 22, the spring seat 2 is fastened to the shaft core 1. At the same time, the fastening screw 22 and the fixing hole 21 are easily disassembled and assembled and can be reused, which is convenient for the staff to use during work, thereby improving the practicality of the device.

[0034] The push ring 3 includes a horizontal section 31 and a vertical section 32. The vertical section 32 is arranged on the end of the horizontal section 31 away from the spring seat 2, and the horizontal section 31 is inserted into the spring seat 2; the first spring 6 has a tightening force on the vertical section 32, so that the vertical section 32 drives the horizontal section 31 to press against the O-ring 8, ensuring the sealing performance of the dynamic ring 4 during movement, thereby improving the practicality of the device.

[0035] A first spring 6 is provided between the spring seat 2 and the push ring 3, one end of the first spring 6 is connected to the spring seat 2, and the end of the first spring 6 away from the spring seat 2 abuts against the vertical section 32; when the horizontal section 31 moves horizontally toward the spring seat 2, the first spring 6 continues to exert an extrusion force toward the vertical section 32, so that the horizontal section 31 can continue to move toward the dynamic ring 4 after moving toward the spring seat 2, so that the horizontal section 31 always presses the O-ring 8 into the placement groove 7, further ensuring the sealing performance of the location, thereby improving the practicality of the device.

[0036] A placement groove 7 is provided inside the dynamic ring 4, and an O-ring 8 is provided inside the placement groove 7; when the dynamic ring 4 rotates, the O-ring 8 reduces the possibility of lubricating oil leakage, and the setting of the O-ring 8 makes the installation part between the dynamic ring 4 and the horizontal section 31 compact, which can achieve a better sealing effect, thereby improving the practicality of the device.

[0037] A transmission hole 9 is provided inside the push ring 3, a transmission pin 10 is provided inside the transmission hole 9, a rotating hole 11 is provided inside the movable ring 4, and one end of the transmission pin 10 extends to the inside of the rotating hole 11; during the rotation of the vertical section 32 and the movable ring 4, the linear speeds of the end of the vertical section 32 away from the shaft core 1 and the end of the movable ring 4 away from the shaft core 1 are the same, and the two can rotate synchronously, which is convenient for the subsequent adjustment of the rotation speed, thereby improving the practicality of the device.

[0038] Working principle: A protective cover is set between the spring seat and the push ring and outside the first spring. The protective cover is made of elastic material and has a retractable effect. It can not only be scaled according to actual usage, but also effectively protect the first spring, reduce the first spring from being exposed to the outside and oxidation caused by air, humidity, etc., thereby increasing the service life of the first spring and improving the sealing performance of the O-ring. By setting an installation mechanism on the protective cover, when the first spring needs to be replaced and inspected, the movable plate can be moved, and the circular hole on the movable plate can be disengaged from the limit rod by squeezing the second spring, thereby quickly removing the protective cover and facilitating the subsequent quick installation of the protective cover, thereby improving the use effect and greatly enhancing the practicality of the device.

[0039] During the installation of the mechanical sealing parts, the positioning screw 24 is threadedly connected to the positioning hole 23 and passes through the push ring 3, so that the position of the push ring 3 and the spring seat 2 is fixed on the shaft core 1, which is convenient for the staff to install quickly and improves work efficiency. The fixing hole 21 is threadedly connected to the fastening screw 22, and the fastening screw 22 is installed to fasten the spring seat 2 on the shaft core 1. At the same time, the fastening screw 22 and the fixing hole 21 are matched and disassembled and easily put into place, can be reused, and are convenient for the staff to use during work, thereby improving the practicality of the device.

[0040] The first spring 6 exerts a pressing force on the vertical section 32, so that the vertical section 32 drives the horizontal section 31 to press against the O-ring 8, thereby ensuring the sealing performance of the dynamic ring 4 during movement and improving the practicality of the device.

[0041] When the horizontal section 31 moves horizontally toward the spring seat 2, the first spring 6 continues to apply an extrusion force toward the vertical section 32, so that the horizontal section 31 can continue to move toward the dynamic ring 4 after moving toward the spring seat 2, so that the horizontal section 31 always presses the O-ring 8 into the placement groove 7, further ensuring the sealing performance at this location, thereby improving the practicality of the device.

[0042] When the dynamic ring 4 rotates, the O-ring 8 reduces the possibility of lubricating oil leakage, and the setting of the O-ring 8 makes the installation part between the dynamic ring 4 and the horizontal section 31 compact, which can achieve a better sealing effect, thereby improving the practicality of the device.

[0043] During the rotation of the vertical section 32 and the moving ring 4, the linear speeds of the end of the vertical section 32 away from the shaft core 1 and the end of the moving ring 4 away from the shaft core 1 are the same, and the two can rotate synchronously, which is convenient for subsequent adjustment of the rotation speed, thereby improving the practicality of the device.

[0044] The above are only preferred specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present application within the technical scope disclosed in the present application, and they should be covered by the protection scope of the present application.

Claims

1. A single-end mechanical seal, comprising a shaft core (1), a spring seat (2), a push ring (3), a dynamic ring (4) and a protective cover (5), characterized in that: The spring seat (2), the push ring (3) and the movable ring (4) are all arranged outside the shaft core (1), and the push ring (3) is located between the spring seat (2) and the movable ring (4). A mounting mechanism (50) is provided on each of the two protective covers (5), and the mounting mechanism (50) includes a mounting block (51), a mounting groove (52), a movable groove (53), a limiting groove (54), a limiting rod (55), a second spring (56), a movable plate (57) and a circular hole (58). Each of the mounting blocks (51) is fixedly connected to the protective cover (5), and a mounting groove (52) and a movable groove (53) are provided inside each of the mounting blocks (51), and each of the mounting grooves (52) and the movable groove (53) are communicated with each other.

2. A single-end mechanical seal according to claim 1, characterized in that: A plurality of limiting grooves (54) are provided inside the two push rings (3), a limiting rod (55) is fixedly connected inside each limiting groove (54), a second spring (56) is provided inside each mounting groove (52), one end of each second spring (56) is fixedly connected to a movable plate (57), and the bottom of each movable plate (57) extends into the limiting groove (54).

3. A single-end mechanical seal according to claim 2, characterized in that: A circular hole (58) is provided inside each movable plate (57), and one end of each limiting rod (55) passes through the interior of the movable plate (57) through the circular hole (58).

4. The single-end mechanical seal according to claim 1, characterized in that: A fixing hole (21) is provided inside the spring seat (2), a fastening screw (22) is connected to the internal thread of the fixing hole (21), and the spring seat (2) is in contact with the shaft core (1) through the fixing hole (21) and the fastening screw (22), a positioning hole (23) is provided inside the spring seat (2), a positioning screw (24) is connected to the internal thread of the positioning hole (23), and one end of the positioning screw (24) extends to the inside of the push ring (3).

5. The single-end mechanical seal according to claim 1, characterized in that: The push ring (3) comprises a horizontal section (31) and a vertical section (32), wherein the vertical section (32) is arranged on an end of the horizontal section (31) away from the spring seat (2), and the horizontal section (31) is inserted into the spring seat (2).

6. A single-end mechanical seal according to claim 5, characterized in that: A first spring (6) is provided between the spring seat (2) and the push ring (3), one end of the first spring (6) is connected to the spring seat (2), and one end of the first spring (6) away from the spring seat (2) abuts against the vertical section (32).

7. The single-end mechanical seal according to claim 1, characterized in that: A placement groove (7) is provided inside the dynamic ring (4), and an O-shaped sealing ring (8) is provided inside the placement groove (7).

8. The single-end mechanical seal according to claim 1, characterized in that: A transmission hole (9) is provided inside the push ring (3), a transmission pin (10) is provided inside the transmission hole (9), a rotation hole (11) is provided inside the movable ring (4), and one end of the transmission pin (10) extends into the rotation hole (11).

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