Mechanical sealing element with sealing ring convenient to replace

Abstract

The utility model relates to the technical field of mechanical sealing elements, in particular to a mechanical sealing element with a sealing ring convenient to replace, which comprises a static ring and a moving ring arranged on the static ring, an annular groove is arranged at the top end of the static ring, the sealing ring convenient to replace is arranged in the annular groove, and the top end of the sealing ring is attached to the bottom end of the moving ring. The top end of the static ring is fixedly connected with an annular connecting table, threaded holes which are evenly distributed are formed in the top end of the annular connecting table, and the threaded holes are connected with a pressing assembly through bolts. The mechanical sealing piece can be quickly disassembled and replaced through the sealing piece, the bolt and the annular groove, so that when the sealing performance becomes poor, the sealing piece can be quickly replaced, the situation of overall replacement is avoided, the living cost is greatly reduced, the movable ring is helped to be pressed through the pressing assembly, and meanwhile the sealing performance of the mechanical sealing piece is improved. And the balls can effectively reduce the friction force of the movable ring, and the rotating efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical sealing technical field especially relates to a mechanical sealing convenient to replace sealing ring. BACKGROUND

[0002] Mechanical sealing is a kind of shaft sealing device for rotating machinery, it is mainly composed of static ring, dynamic ring, elastic element (such as spring) and auxiliary sealing ring etc. component. Its working principle is through the close adhesion of dynamic ring and static ring, and under the pre-tightening force of elastic element and the action of medium pressure, a stable sealing surface is formed between the relative rotating motion surface, prevents the sealed medium (such as liquid, gas) leakage, is widely used in pump, compressor, reaction kettle etc. equipment, can effectively improve the sealing property and reliability of equipment.

[0003] The main sealing element in mechanical sealing is composed of dynamic ring and static ring, and its operating principle is that dynamic ring keeps close contact with the end face of static ring during rotation. Due to its rotary motion, a dynamic seal is formed between it and static ring to prevent internal liquid or gas from leaking out, but during long-term use, the dynamic ring and static ring will inevitably be worn when they are rotated in close contact, which seriously affects the sealing effect of the mechanical sealing element. The existing mechanical sealing element can only be replaced as a whole when the sealing effect is poor, which is inconvenient to replace and greatly increases the use cost. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the existing in long-term use, dynamic ring and static ring close rotation inevitably will produce wear, thereby seriously influence mechanical sealing element's sealing effect, the existing mechanical sealing element can only be replaced as a whole when the sealing effect is poor, and inconveniently replace, use cost greatly increases'shortcoming, and propose a kind of mechanical sealing convenient to replace sealing ring of element.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of mechanical sealing convenient to replace sealing ring of element, including static ring, dynamic ring being set on the static ring, the top of the static ring is equipped with annular groove, the annular groove is equipped with the sealing ring convenient to replace, the top of the sealing ring is in close contact with the bottom of dynamic ring, the top of the static ring is fixedly connected with annular connecting table, the top of the annular connecting table is equipped with the thread hole that is evenly distributed, the thread hole is connected with pressure assembly by lock bolt.

[0007] Preferably, the outer wall of the dynamic ring is fixedly connected with an extension ring.

[0008] Preferably, the outer wall of the sealing ring is provided with uniformly distributed through holes with internal threads, the inner wall of the sealing ring is provided with a soft sealing pad, and bolts are arranged on the through holes.

[0009] Preferably, the outer wall of the static ring is provided with counterbores, the positions of the counterbores are matched with the positions of the through holes, and the bolts pass through the through holes and the matched counterbores to connect the static ring and the sealing ring.

[0010] Preferably, the pressing assembly comprises uniformly distributed sliding grooves, balls, springs, sliding plates and a shell, the sliding grooves are arranged on the inner wall of the shell, one end of the spring is fixedly connected with the top end of the inner wall of the shell, the other end of the spring is fixedly connected with the top end of the sliding plate, and the sliding plate is in sliding connection with the inner wall of the shell.

[0011] Preferably, the bottom end of the shell is in abutment with the top end of the annular connecting table, the sliding plate is in sliding connection with the sliding groove, and the balls are arranged on the top end of the inner wall of the shell and the bottom end of the sliding plate respectively.

[0012] Compared with the prior art, the mechanical sealing piece with the sealing ring convenient to replace has the following beneficial effects:

[0013] In use, the sealing ring, the bolt and the annular groove are arranged to realize quick dismounting and replacement of the mechanical sealing piece, so that the sealing piece can be quickly replaced when the sealing performance is poor, the overall replacement is avoided, and the living cost is greatly reduced.

[0014] In use, the pressing assembly is arranged to help the dynamic ring to be pressed and to play a two-layer sealing role, the balls can effectively reduce the friction of the dynamic ring and improve the rotation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A three-dimensional structure schematic view of the mechanical sealing piece with the sealing ring convenient to replace is provided in the utility model;

[0016] Figure 2 A half-cut three-dimensional structure schematic view of the mechanical sealing piece with the sealing ring convenient to replace is provided in the utility model;

[0017] Figure 3 A three-dimensional structure schematic view of the static ring of the mechanical sealing piece with the sealing ring convenient to replace is provided in the utility model;

[0018] Figure 4 A three-dimensional structure schematic view of the sealing ring of the mechanical sealing piece with the sealing ring convenient to replace is provided in the utility model;

[0019] Figure 5 A three-dimensional structure schematic view of the dynamic ring of the mechanical sealing piece with the sealing ring convenient to replace is provided in the utility model;

[0020] Figure 6 The utility model provides a kind of mechanical seal's compression assembly solid structure schematic diagram of sealing ring convenient to replace of new.

[0021] In the drawing: 1, static ring;2, dynamic ring;21, extension ring;3, annular groove;4, sealing ring;41, through hole;42, sealing pad;43, bolt;5, annular connecting platform;6, threaded hole;7, compression assembly;71, sliding groove;72, ball;73, spring;74, sliding plate;75, shell. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] Reference Figures 1-6 A kind of mechanical seal of sealing ring convenient to replace, including static ring 1, setting on static ring 1 dynamic ring 2, the top of static ring 1 is equipped with annular groove 3, annular groove 3 is equipped with the sealing ring 4 convenient to replace, the top of sealing ring 4 is consistent with the bottom of dynamic ring 2, the top of static ring 1 is fixedly connected with annular connecting platform 5, the top of annular connecting platform 5 is equipped with the threaded hole 6 of being evenly distributed, threaded hole 6 is connected with compression assembly 7 by locking bolt.

[0024] It should be noted that static ring 1 and dynamic ring 2 are prior art, and the specific model specification needs to be selected and determined according to the actual specification of the device. The specific selection calculation method uses existing technology in the art, so it is not described in detail.

[0025] Further, the outer wall of dynamic ring 2 is fixedly connected with extension ring 21.

[0026] Among them, extension ring 21 is mainly used to contact with the internal structure of compression assembly 7, cooperate with the use of compression assembly 7.

[0027] Further, the outer wall of sealing ring 4 is equipped with the through hole 41 of evenly distributed inner thread, the inner wall of sealing ring 4 is provided with relatively soft sealing pad 42, and bolt 43 is arranged on through hole 41.

[0028] Among them, sealing pad 42 mainly prevents liquid or gas from flowing through, and plays a role in enhancing sealing effect.

[0029] Further, the outer wall of the static ring 1 is provided with a countersunk hole, the position of the countersunk hole is matched with the position of the through hole 41, and the bolt 43 is used to connect the static ring 1 and the sealing ring 4.

[0030] The sealing ring 4 is convenient to disassemble, mainly by connecting the sealing ring 4 and the static ring 1 through the bolt 43, and the sealing ring 4 can be replaced by only disassembling the bolt 43 on the outer wall of the static ring 1, so that the sealing property is ensured and the disassembly is simple.

[0031] Further, the compression assembly 7 comprises uniformly distributed sliding grooves 71, balls 72, springs 73, sliding plates 74 and an outer shell 75, the sliding grooves 71 are arranged on the inner wall of the outer shell 75, one end of the spring 73 is fixedly connected with the top end of the inner wall of the outer shell 75, the other end of the spring 73 is fixedly connected with the top end of the sliding plate 74, and the sliding plate 74 is slidably connected with the inner wall of the outer shell 75.

[0032] The compression assembly 7 wraps the dynamic ring 2 and the static ring 1 in the middle through the outer shell 75, the sliding plate 74 below the spring 73 abuts against the top end of the dynamic ring 2, so that the dynamic ring 2 can always be close to the bottom.

[0033] Further, the bottom end of the outer shell 75 abuts against the top end of the annular connecting table 5, the sliding plate 74 is slidably connected with the sliding groove 71, and the balls 72 are arranged at the top end of the inner wall of the outer shell 75 and the bottom end of the sliding plate 74 respectively.

[0034] The balls 72 distributed at different positions all play a role in compressing the dynamic ring 2 without affecting the rotation of the dynamic ring 2, the ball 72 at the top end of the inner wall of the outer shell 75 rolls with the top end of the dynamic ring 2, and the ball 72 at the bottom end of the sliding plate 74 rolls with the top end of the extension ring 21.

[0035] Working principle: when the sealing ring 4 needs to be replaced, the locking bolt on the outer shell 75 can be disassembled first, then the compression assembly 7 is taken out from the top, at this time the static ring 1, the dynamic ring 2 and the sealing ring 4 are exposed, the dynamic ring 2 is taken out from the top, then the bolt 43 is unscrewed by using a tool, the sealing ring 4 can be taken out from the top of the annular groove 3, after the new sealing ring 4 is replaced, the sealing ring 4 can be inserted into the annular groove 3 again, the through hole 41 is aligned with the countersunk hole on the static ring 1, and the sealing ring 4 is connected through the bolt 43, then the dynamic ring 2 and the compression assembly 7 are reinstalled.

[0036] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A mechanical seal facilitating replacement of a seal ring, comprising a static ring (1), a dynamic ring (2) provided on the static ring (1), characterized in that, The top end of the static ring (1) is provided with an annular groove (3), a replaceable sealing ring (4) is arranged in the annular groove (3), the top end of the sealing ring (4) is attached to the bottom end of the dynamic ring (2), the top end of the static ring (1) is fixedly connected with an annular connecting table (5), the top end of the annular connecting table (5) is provided with uniformly distributed threaded holes (6), and the threaded holes (6) are connected with a pressing assembly (7) through locking bolts.

2. The mechanical seal with a seal ring replacement facilitation according to claim 1, characterized in that, The outer wall of the dynamic ring (2) is fixedly connected with an extension ring (21).

3. The mechanical seal with a seal ring replacement facilitation according to claim 1, characterized in that, The outer wall of the sealing ring (4) is provided with uniformly distributed through holes (41) with internal threads, the inner wall of the sealing ring (4) is provided with a relatively soft sealing gasket (42), and the through holes (41) are provided with bolts (43).

4. A mechanical seal with a seal ring that is easy to replace according to claim 3, characterized in that The outer wall of the static ring (1) is provided with a countersunk hole, the position of the countersunk hole is matched with the position of the through hole (41), and the bolts (43) pass through the through hole (41) and the matched hole to connect the static ring (1) and the sealing ring (4).

5. The mechanical seal with a seal ring replacement facilitation according to claim 1, characterized in that, The pressing assembly (7) comprises uniformly distributed sliding grooves (71), balls (72), springs (73), sliding plates (74) and housings (75), the sliding grooves (71) are arranged on the inner wall of the housing (75), one end of the spring (73) is fixedly connected with the top end of the inner wall of the housing (75), the other end of the spring (73) is fixedly connected with the top end of the sliding plate (74), and the sliding plate (74) is slidingly connected with the inner wall of the housing (75).

6. A mechanical seal with a seal ring that is easy to replace according to claim 5, characterized in that The bottom end of the housing (75) is abutted with the top end of the annular connecting table (5), the sliding plate (74) is slidingly connected with the sliding groove (71), and the balls (72) are respectively arranged on the top end of the inner wall of the housing (75) and the bottom end of the sliding plate (74).

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