Anti-corrosion double-end-face mechanical sealing assembly

Abstract

The utility model relates to the technical field of double-end-face mechanical sealing assemblies, and discloses an anti-corrosion double-end-face mechanical sealing assembly which comprises an outer shell, the two ends of the outer shell are both movably connected with static ring fixing shells, static rings are both fixedly connected in the two static ring fixing shells, a spring support is fixedly connected in the outer shell, and the spring support is fixedly connected in the outer shell. The two sides of the spring support are each provided with four symmetrical cylindrical grooves, by adjusting the distance between the two adjusting rings, the telescopic length of the spring is adjusted, and under the condition that the spring has small-amplitude elastic fatigue, it is guaranteed that the two movable rings can be pushed to be elastically attached to the two static rings through the elastic force of the two attaching rings, so that the two static rings are elastically attached to each other; therefore, the service life of the device is prolonged, the spring replacement frequency is reduced, and practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to double -sided mechanical seal assembly technical field, concretely is a kind of anticorrosive double -sided mechanical seal assembly. BACKGROUND

[0002] Double-sided mechanical seal principle and single-sided mechanical seal are basically same, are the device for preventing fluid leakage by the end face (friction pair) perpendicular to rotation axis under the action of fluid pressure and compensation mechanism elasticity and the cooperation of auxiliary seal and relative sliding and constitute.

[0003] Double-sided mechanical seal assembly generally by two dynamic rings and two static rings cooperation work, and dynamic ring needs to be connected by the elastic force of spring and static ring, and spring is prone to spring deformation contraction under the condition of high frequency deformation, generally spring deformation contraction, leading to the reduction of elastic interval, so as to reduce the sealing efficiency of sealing assembly, reduce the service life of device.

[0004] Therefore, it is necessary to design a kind of anticorrosive double -sided mechanical seal assembly to solve the above problems. INVENTION CONTENTS

[0005] The utility model discloses a kind of anticorrosive double -sided mechanical seal assembly, to solve the technical problem proposed in above background art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: an anticorrosive double-end-face mechanical seal assembly, including the shell, both ends of the shell are all movably connected with static ring fixed shell, and the inside of two static ring fixed shell is all fixed with static ring, and the inside of the shell is fixed with spring support, both sides of the spring support are all provided with four symmetrical cylindrical grooves, and the inside of four cylindrical grooves of the same side is all slidably inserted with sliding sheet, one side of the sliding sheet is fixed with first connecting column, the other side of the sliding sheet is fixed with second connecting column, one sliding ring is commonly fixed to the one end of four first connecting columns, and four springs of cross distribution are fixed to one side of the sliding ring, and one sticking ring is commonly fixed to the one end of four springs, and the dynamic ring is stuck to one side of the sticking ring, one adjusting ring is commonly fixed to the one end of four second connecting columns, and the inner wall of the spring support is provided with annular groove, the inner wall of the annular groove is provided with four slide grooves that are two by two symmetrical, two adjusting rings are slidably arranged in the inside of two annular grooves, and the outer surfaces of two adjusting rings are both fixed with two sliding blocks, and four sliding blocks are respectively slidably arranged in the inside of four slide grooves, and the outer surface of the spring support is provided with operation groove, a two-way threaded rod is commonly screwed into the inside of two sliding blocks at the top, one end of the two-way threaded rod penetrates the inside of the operation groove, and a knob is fixed to one end of the two-way threaded rod in the inside of the operation groove, a positioning rod is commonly inserted between two sliding blocks at the bottom, and two sliding blocks are slidably inserted in the outer surface of the positioning rod, and the outer surfaces of two static rings and the inner walls of two dynamic rings are both clamped with sealing rings.

[0007] Preferably, one side of the two static ring fixed shells is fixed with an insertion ring, and both sides of the shell are provided with insertion interfaces, two insertion rings are respectively slidably inserted into the insertion interfaces, and the two insertion rings are threadedly connected with the shell through two bolts.

[0008] Preferably, the number of springs is eight, and four springs are two groups, two ends of two groups of springs are respectively fixed between a sticking ring and a sliding ring, and four first connecting columns are two groups, one end of two groups of first connecting columns is respectively flush with one side of two sliding rings.

[0009] Preferably, four sliding blocks are respectively slidably arranged in the inside of four slide grooves, and two sides of four sliding blocks are respectively attached to two sides of four slide grooves.

[0010] Preferably, the diameters of two adjusting rings are equal to the diameter of the spring support, and the outer surfaces of eight sliding sheets are respectively attached to the outer surfaces of eight cylindrical grooves.

[0011] Preferably, two said dynamic rings are respectively arranged on one side of two said static rings, and two said dynamic rings are respectively matched with two said static rings, and the material of said sealing ring on the outer surface of two said static rings and the material of said sealing ring inside two said dynamic rings are HNBR hydrogenated nitrile rubber.

[0012] Compared with the prior art, the technical scheme provided by the utility model has the beneficial effects as follows.

[0013] The utility model discloses the interval adjustment of two adjusting rings, and the elastic fatigue of spring is adjusted, the elastic force of two static rings is pushed to two dynamic rings respectively, the service life of the device is improved, the frequency of spring replacement is reduced, and the practicality is strong. ACCURACY OF DRAWINGS

[0014] Figure 1 It is the structural schematic diagram of the utility model;

[0015] Figure 2 It is the exploded schematic diagram of the shell structure of the utility model;

[0016] Figure 3 It is the exploded schematic diagram of the spring support structure of the utility model;

[0017] Figure 4 It is Figure 2 It is the enlarged structure schematic diagram of A place in the utility model;

[0018] In the drawing: 1, shell;2, static ring fixed shell;3, operation groove;4, static ring;5, knob;6, two -way thread rod;7, sliding slot;8, sliding block;9, positioning rod;10, insert ring;11, spring support;12, sliding ring;13, spring;14, first connecting column;15, static ring;16, dynamic ring;17, adjusting ring;18, second connecting column;19, sliding sheet;20, cylindrical groove;21, annular groove;22, plug interface. DETAILED DESCRIPTION

[0019] The technical scheme in the utility model embodiment will be clearly and completely described below with reference to the drawings in the utility model embodiment.

[0020] Obviously, a plurality of specific details are set forth in the following description in order to provide a thorough understanding of the utility model, but the utility model can also be implemented in other ways different from the description, therefore, the utility model is not limited to the specific embodiments disclosed in the following description.

[0021] Please refer to Figures 1-4This utility model provides a corrosion-resistant double-end mechanical seal assembly, including a housing 1. Both ends of the housing 1 are movably connected to stationary ring fixing shells 2, and stationary rings 4 are fixedly connected inside each of the two stationary ring fixing shells 2. A spring support 11 is fixedly connected inside the housing 1. Four symmetrical cylindrical grooves 20 are formed on both sides of the spring support 11, and sliding plates 19 are slidably inserted into the four cylindrical grooves 20 on the same side. A first connecting post 14 is fixedly connected to one side of the sliding plate 19, and a second connecting post 18 is fixedly connected to the other side of the sliding plate 19. One end of each of the four first connecting posts 14 is fixedly sleeved with a sliding plate. A moving ring 12 and a sliding ring 12 are fixedly connected to one side of four springs 13 arranged in a cross pattern. One end of each of the four springs 13 is fixedly connected to a retaining ring 15. One side of the retaining ring 15 is attached to a moving ring 16. One end of each of the four second connecting posts 18 is fixedly connected to an adjusting ring 17. The inner wall of the spring support 11 is provided with an annular groove 21. The inner wall of the annular groove 21 is provided with four symmetrical sliding grooves 7. The two adjusting rings 17 are slidably disposed inside the two annular grooves 21. The outer surface of each adjusting ring 17 is fixedly connected to two sliding blocks 8. The four sliding blocks 8 are respectively slidably disposed in the four... Inside the slide groove 7, and on the outer surface of the spring support 11, there is an operating groove 3. A bidirectional threaded rod 6 is threadedly inserted into the two top sliding blocks 8, with one end of the bidirectional threaded rod 6 penetrating the inside of the operating groove 3. A knob 5 is fixed to one end of the bidirectional threaded rod 6 inside the operating groove 3. A positioning rod 9 is inserted between the two bottom sliding blocks 8, and both sliding blocks 8 are slidably inserted into the outer surface of the positioning rod 9. Sealing rings are fitted onto the outer surfaces of the two stationary rings 4 and the inner walls of the two moving rings 16. When the four springs 13 of each pair begin to show a slight loss of elasticity, it can be... Rotating knob 5 allows the four sliding blocks 8 to slide within the four sliding grooves 7 via the bidirectional threaded rod 6. This adjusts the two adjusting rings 17 to push the two sliding rings 12 away from the sides of the spring support 11 in the direction of the two moving rings 16. By shortening the opening distance of the eight springs 13, even when the springs 13 shrink in elasticity, the elasticity of the springs 13 can still be used to push the two contact rings 15 to push the two moving rings 16 into contact with the two stationary rings 4. This improves the overall service life of the device and prevents the need to replace the springs due to minor fatigue, thus reducing the efficiency of the device.

[0022] To facilitate the movable connection between the two stationary ring fixing shells 2 and the outer shell 1, thereby making disassembly easier, each of the two stationary ring fixing shells 2 has a plug ring 10 fixedly connected to one side, and the outer shell 1 has a plug interface 22 on both sides. The two plug rings 10 are slidably inserted into the inside of the plug interface 22, and the two plug rings 10 are threadedly connected to the outer shell 1 by two bolts.

[0023] To facilitate the use of the elastic sliding of the two contact rings 15 to make the two moving rings 16 fit with the two stationary rings 4 respectively, there are eight springs 13, and four springs 13 form a group of two groups. The two ends of the two groups of springs 13 are respectively fixed between a contact ring 15 and a sliding ring 12. The four first connecting posts 14 form a group of two groups. One end of the two groups of first connecting posts 14 is flush with the side of the two sliding rings 12 that is far away from each other.

[0024] To ensure the sliding stability of the four sliding blocks 8, the four sliding blocks 8 are respectively slidably disposed inside the four sliding grooves 7, and the two sides of the four sliding blocks 8 are respectively attached to the two sides of the four sliding grooves 7.

[0025] Furthermore, in order to avoid the two adjusting rings 17 from obstructing the insertion connection of the output shaft, the diameter of the two adjusting rings 17 is equal to the diameter of the spring support 11, and the outer surfaces of the eight sliding plates 19 respectively fit against the outer surfaces of the eight cylindrical grooves 20.

[0026] To improve the corrosion resistance and sealing performance of the device, the two rotating rings 16 are respectively rotatably mounted on one side of the two contact rings 15, and the two rotating rings 16 are respectively attached to the two stationary rings 4. The sealing rings on the outer surface of the two stationary rings 4 and the sealing rings inside the two rotating rings 16 are both made of HNBR hydrogenated nitrile butadiene rubber.

[0027] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0028] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0029] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A corrosion-resistant double-end mechanical seal assembly, comprising a housing (1), characterized in that: Both ends of the outer shell (1) are movably connected to stationary ring fixing shells (2), and stationary rings (4) are fixedly connected inside the two stationary ring fixing shells (2). A spring support (11) is fixedly connected inside the outer shell (1). Four symmetrical cylindrical grooves (20) are opened on both sides of the spring support (11), and sliding pieces (19) are slidably inserted into the four cylindrical grooves (20) on the same side. A first connecting post (14) is fixedly connected to one side of the sliding piece (19). On the other side of the first connecting post (14), a second connecting post (18) is fixedly connected. One end of each of the four first connecting posts (14) is fixedly fitted with a sliding ring (12). One side of the sliding ring (12) is fixedly connected with four springs (13) arranged in a cross pattern. One end of each of the four springs (13) is fixedly connected with a retaining ring (15). One side of the retaining ring (15) is fitted with a moving ring (16). One end of each of the four second connecting posts (18) is fixedly connected with an adjusting ring (17). The spring support (14) is fixedly connected with a second connecting post (18). 1) The inner wall of the spring support (11) is provided with an annular groove (21), and the inner wall of the annular groove (21) is provided with four symmetrical sliding grooves (7). The two adjusting rings (17) are slidably disposed inside the two annular grooves (21), and the outer surface of the two adjusting rings (17) is fixed with two sliding blocks (8). The four sliding blocks (8) are respectively slidably disposed inside the four sliding grooves (7). The outer surface of the spring support (11) is provided with an operating groove (3), and the two sliding blocks (8) at the top are provided with an operating groove (3). A bidirectional threaded rod (6) is inserted into the common internal thread, and one end of the bidirectional threaded rod (6) passes through the inside of the operating groove (3). A knob (5) is fixed to one end of the bidirectional threaded rod (6) inside the operating groove (3). A positioning rod (9) is inserted between the two sliding blocks (8) at the bottom, and the two sliding blocks (8) are slidably inserted into the outer surface of the positioning rod (9). Sealing rings are snapped onto the outer surface of the two stationary rings (4) and the inner wall of the two moving rings (16).

2. The corrosion-resistant double-end mechanical seal assembly according to claim 1, characterized in that: Each of the two stationary ring fixing shells (2) is fixedly connected to one side with a plug ring (10), and both sides of the outer shell (1) are provided with plug interfaces (22). The two plug rings (10) are slidably inserted into the inside of the plug interface (22), and both plug rings (10) are threadedly connected to the outer shell (1) by two bolts.

3. The corrosion-resistant double-end mechanical seal assembly according to claim 1, characterized in that: The number of springs (13) is eight, and four springs (13) form a group of two groups. The two ends of the two groups of springs (13) are respectively fixed between a retaining ring (15) and a sliding ring (12). The four first connecting posts (14) form a group of two groups. One end of the two groups of first connecting posts (14) is flush with the side of the two sliding rings (12) that is far away from each other.

4. The corrosion-resistant double-end mechanical seal assembly according to claim 1, characterized in that: The four sliding blocks (8) are respectively slidably disposed inside the four sliding grooves (7), and the two sides of the four sliding blocks (8) are respectively attached to the two sides of the four sliding grooves (7).

5. The corrosion-resistant double-end mechanical seal assembly according to claim 1, characterized in that: The diameters of the two adjusting rings (17) are equal to the diameter of the spring support (11), and the outer surfaces of the eight sliding plates (19) are respectively in contact with the outer surfaces of the eight cylindrical grooves (20).

6. The corrosion-resistant double-end mechanical seal assembly according to claim 1, characterized in that: The two moving rings (16) are respectively rotatably disposed on one side of the two adhesive rings (15), and the two moving rings (16) are respectively attached to the two stationary rings (4), and the sealing rings on the outer surface of the two stationary rings (4) and the sealing rings inside the two moving rings (16) are both made of HNBR hydrogenated nitrile rubber.

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