Centrifugal pump labyrinth oil seal

Abstract

The utility model belongs to the technical field of labyrinth oil seals, and discloses a centrifugal pump labyrinth oil seal which comprises a centrifugal pump shaft body, a static ring body is installed outside the centrifugal pump shaft body, one side of the static ring body is connected with a movable ring body, and O-shaped rings are arranged on the outer wall of the static ring body and the inner wall of the movable ring body. According to the movable ring of the centrifugal pump, the scraping assembly structure is arranged, the pressing plate can drive the scraping plate to move towards the inner side of the annular plate under the elastic force effect of the spring, one end of the scraping plate is made to make close contact with the outer wall of the shaft body of the centrifugal pump, and in the rotating process of the shaft body of the centrifugal pump, the scraping plate can be driven to move towards the inner side of the annular plate. According to the centrifugal pump, the scraper can scrape dust accumulated on the outer wall of the shaft body of the centrifugal pump, so that the dust on the outer wall of the shaft body of the centrifugal pump can be quickly removed, an operator does not need to manually clean the centrifugal pump, the dust is effectively prevented from entering the space between the labyrinth oil seal and the shaft body, and normal use of the labyrinth oil seal is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of labyrinth oil seal, specifically relates to a centrifugal pump labyrinth oil seal. BACKGROUND

[0002] The PT device centrifugal pump has been using skeleton oil seal, and its working principle is to produce sealing effect through the elastic deformation of the lip structure, but when the lip seal is used for a long time, aging, hardening and medium leakage and other phenomena are prone to occur, which affects the normal operation of the device, and a new type of seal is urgently needed to solve the problem, and after investigation and comprehensive consideration, it is decided to use the labyrinth oil seal, which has the advantages of long service life and no damage to the shaft.

[0003] However, the existing labyrinth oil seal will accumulate a large amount of dust between the labyrinth oil seal and the shaft body during long-term use, which needs to be cleaned manually by the operator, and it is difficult to quickly remove the dust, which can easily lead to dust entering between the labyrinth oil seal and the shaft, causing wear between the shaft and the labyrinth oil seal, and is not conducive to the normal use of the labyrinth oil seal. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a centrifugal pump labyrinth oil seal to solve the problem that the existing labyrinth oil seal will accumulate a large amount of dust between the labyrinth oil seal and the shaft body, which is difficult to quickly remove the dust.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a centrifugal pump labyrinth oil seal, comprising: a centrifugal pump shaft body, a static ring body is installed outside the centrifugal pump shaft body, a dynamic ring body is connected to one side of the static ring body, and O-rings are arranged on the outer wall of the static ring body and the inner wall of the dynamic ring body; a scraping assembly is arranged on one side of the dynamic ring body, the scraping assembly comprises an annular plate, the annular plate is connected to one side of the dynamic ring body, a cavity is formed in the inside of the annular plate, a spring is connected to one side of the inner wall of the cavity, a pressing plate is connected to one end of the spring, a scraper is connected to the bottom of the pressing plate, and one end of the scraper penetrates the inside of the bottom side of the annular plate; a dismounting assembly is arranged between the annular plate and the dynamic ring body.

[0006] Preferably, the dismounting assembly comprises two arc-shaped plates, the two arc-shaped plates are symmetrically connected to one side of the outer wall of the dynamic ring body, and the two arc-shaped plates are connected to the screw rods through penetration, the screw rods are threadedly connected with the arc-shaped plates, and the two side walls of the annular plate are provided with limiting grooves matched with the screw rods.

[0007] Preferably, the bottom end of the scraper is provided with inclined surfaces on both sides.

[0008] Preferably, the top of the pressing plate is connected with a pull rod, one end of the pull rod penetrates the top of the annular plate, and the end of the pull rod penetrating the annular plate is connected with a pull ring.

[0009] Preferably, the bottom of the annular plate is provided with an opening.

[0010] Preferably, one end of the screw rod is connected with a torsion plate, and arc grooves are formed on both sides of the torsion plate.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] (1) The utility model discloses a scraping assembly is set up, and the pressing plate moves to the inside of the annular plate under the elastic force of the spring, so that the one end of the scraper is in close contact with the outer wall of the centrifugal pump shaft body, when the centrifugal pump shaft body rotates, the scraper can scrape the dust accumulated on the outer wall of the centrifugal pump shaft body, so that the dust on the outer wall of the centrifugal pump shaft body is removed quickly, and the operator need not clean it manually, so that the dust is prevented from entering the labyrinth oil seal and the shaft body, and the normal use of the labyrinth oil seal is facilitated.

[0013] (2) The utility model discloses a dismounting assembly, when the annular plate and the movable ring body need to be separated, two screw rods are screwed, the screw rod is connected with the arc plate through a thread, so that the screw rod moves outward on the arc plate, in this process, one end of the screw rod is separated from the limiting groove, so that the annular plate is released from the limiting of the movable ring body, the annular plate and the movable ring body are quickly disassembled, the dismounting efficiency of the device is improved, the scraper can be cleaned and replaced regularly, and the convenience of the device is improved. ACCURATE DRAWINGS

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

[0015] Figure 2 It is a partial structural schematic diagram of the right view of the utility model;

[0016] Figure 3 It is Figure 1 the enlarged view of A;

[0017] In the drawing: 1, centrifugal pump shaft body; 2, static ring body; 3, movable ring body; 4, O ring; 5, annular plate; 6, cavity groove; 7, spring; 8, pressing plate; 9, scraper; 10, pull rod; 11, pull ring; 12, inclined plane; 13, opening; 14, arc plate; 15, screw rod; 16, limiting groove; 17, torsion plate; 18, arc groove. CONCRETE IMPLEMENTATION

[0018] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] Referring to Figures 1-3 The utility model provides technical scheme as follows: A centrifugal pump labyrinth oil seal, include: centrifugal pump shaft body 1, centrifugal pump shaft body 1 outside installation has static ring body 2, static ring body 2 one side is connected with dynamic ring body 3, and the outer wall of static ring body 2 and the inner wall of dynamic ring body 3 are all provided with O type ring 4, the scraping assembly is set up in dynamic ring body 3 one side, and the scraping assembly includes annular plate 5, and annular plate 5 is connected in dynamic ring body 3 one side, and the inside of annular plate 5 is provided with cavity groove 6, and the inner wall one side of cavity groove 6 is connected with spring 7, and one end of spring 7 is connected with pressing plate 8, and the bottom of pressing plate 8 is connected with scraper 9, and one end of scraper 9 is penetrated in the inside bottom side of annular plate 5, and the dismounting assembly is set up between annular plate 5 and dynamic ring body 3.

[0020] Through the above technical scheme,

[0021] Specifically, when the dust near the dynamic ring body 3 of the centrifugal pump shaft body 1 needs to be cleaned, the pressing plate 8 will drive the scraper 9 to move to the inside of the annular plate 5 under the elastic force of the spring 7, so that one end of the scraper 9 is in close contact with the outer wall of the centrifugal pump shaft body 1. During the rotation of the centrifugal pump shaft body 1, the scraper 9 will scrape the dust accumulated on the outer wall of the centrifugal pump shaft body 1, thereby avoiding the accumulation of dust on the centrifugal pump shaft body 1.

[0022] In the utility model, further implementation is provided, referring to Figure 2 The dismounting assembly includes two arc-shaped plates 14, which are symmetrically connected to one side of the outer wall of the dynamic ring body 3, and the two arc-shaped plates 14 are both penetrated and connected with the screw rod 15. The screw rod 15 is threadedly connected with the arc-shaped plate 14, and the two side walls of the annular plate 5 are both provided with a limiting groove 16 matched with the screw rod 15.

[0023] Through the above technical scheme,

[0024] Specifically, when the annular plate 5 needs to be separated from the dynamic ring body 3, the two screw rods 15 are screwed. Since the screw rod 15 is threadedly connected with the arc-shaped plate 14, the screw rod 15 moves outward on the arc-shaped plate 14. During this process, one end of the screw rod 15 is separated from the limiting groove 16, so that the annular plate 14 is released from the limiting on the dynamic ring body 3, thereby separating the annular plate 5 from the dynamic ring body 3.

[0025] Referring to Figures 1-3 , the bottom end of the scraper 9 is provided with an inclined surface 12 on both sides, the top of the pressing plate 8 is connected with a pull rod 10, one end of the pull rod 10 penetrates the top of the annular plate 5, and the end of the pull rod 10 penetrating the annular plate 5 is connected with a pull ring 11, the bottom of the annular plate 5 is provided with an opening 13, one end of a screw rod 15 is connected with a twist plate 17, and the two sides of the twist plate 17 are provided with arc grooves 18.

[0026] Through the above technical scheme:

[0027] Specifically, the inclined surface is arranged to facilitate the scraper 9 to quickly scrape off dust, the pull rod 10 and the pull ring 11 are arranged to facilitate the scraper 9 to move upward, the opening 13 is arranged to facilitate the dust scraped off to fall from the opening 13, and the twist plate 17 and the arc grooves 18 are arranged to facilitate the screw rod 15 to be screwed.

[0028] It should be noted that in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A centrifugal pump labyrinth oil seal characterized by, Include: Centrifugal pump shaft (1), the static ring body (2) is installed outside the centrifugal pump shaft (1), one side of the static ring body (2) is connected with the dynamic ring body (3), the outer wall of the static ring body (2) and the inner wall of the dynamic ring body (3) are provided with O ring (4); Scraping assembly, the scraping assembly is arranged on one side of the dynamic ring body (3), the scraping assembly includes annular plate (5), the annular plate (5) is connected to one side of the dynamic ring body (3), and the inside of the annular plate (5) is provided with cavity groove (6), one side of the inner wall of the cavity groove (6) is connected with spring (7), one end of the spring (7) is connected with pressing plate (8), the bottom of the pressing plate (8) is connected with scraper (9), one end of the scraper (9) penetrates the inside bottom side of the annular plate (5); Disassembly assembly, the disassembly assembly is arranged between the annular plate (5) and the dynamic ring body (3).

2. A centrifugal pump labyrinth oil seal according to claim 1, characterized in that: The disassembly assembly includes arc-shaped plate (14), two arc-shaped plates (14) are symmetrically connected to one side of the outer wall of the dynamic ring body (3), and two arc-shaped plates (14) are connected with screw rod (15) penetratingly, the screw rod (15) and the arc-shaped plate (14) are connected in screw thread, both side walls of the annular plate (5) are provided with limiting groove (16) matched with the screw rod (15).

3. A centrifugal pump labyrinth oil seal according to claim 1, characterized in that: The bottom end of the scraper (9) is provided with inclined plane (12) on both sides.

4. A centrifugal pump labyrinth oil seal according to claim 1, characterized in that: The top of the pressing plate (8) is connected with pull rod (10), one end of the pull rod (10) penetrates the top of the annular plate (5), and one end of the pull rod (10) penetrating the annular plate (5) is connected with pull ring (11).

5. A labyrinth oil seal for a centrifugal pump according to claim 1, characterized in that: The bottom of the annular plate (5) is provided with opening (13).

6. A centrifugal pump labyrinth oil seal according to claim 2, characterized in that: One end of the screw rod (15) is connected with torsion plate (17), both sides of the torsion plate (17) are provided with arc groove (18).

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