Dry gas sealing structure for pump

Abstract

The utility model discloses a pump dry gas sealing structure which comprises a mounting plate, a through hole is formed in the mounting plate, a dry gas sealer body is arranged on one side of the mounting plate, a sealing ring groove is formed in the side, away from the dry gas sealer body, of the mounting plate, and a sealing ring is arranged in the sealing ring groove. A shaft sleeve is arranged at the end, away from the mounting plate, of the dry gas sealer body, and a baffle is arranged in the shaft sleeve. The dry gas sealing structure for the pump is rapidly connected with the pump through the arranged mounting plate, leakage between the pump and the mounting plate is prevented through the arranged sealing ring, the dry gas sealing structure can be connected with an output shaft of the pump through the arranged baffle, and dry gas sealing is carried out when the pump works through the arranged dry gas sealer body; compared with labyrinth sealing, mechanical sealing, packing sealing and the like, the sealing mode of the pump can be rapidly changed, and the sealing effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of dry gas seals, and particularly relates to a dry gas seal structure for a pump. Background Art

[0002] The dry gas seal, namely "dry running gas seal", is a new type of shaft end seal that applies the slotted seal technology to gas seals and belongs to non-contact seals. The principle of the dry gas seal is as follows: when the rotating ring with hydrodynamic grooves on the outer side of the end face rotates, the hydrodynamic grooves pump the high-pressure isolation gas on the outer diameter side (referred to as the upstream side) into the space between the seal end faces. The gas film pressure gradually increases from the outer diameter to the groove diameter, and gradually decreases from the groove diameter to the inner diameter. Due to the increase in the end face film pressure, the opening force formed is greater than the closing force acting on the seal ring, and a very thin gas film is formed between the friction pairs, so that the seal works in a non-contact state. The formed gas film completely blocks the leakage channel of the relatively low-pressure sealed medium, achieving zero leakage or zero escape of the sealed medium. The seals of pumps include labyrinth seals, mechanical seals, packing seals, etc. Once the above-mentioned seal methods fail, it is not only inconvenient for maintenance, but also the sealing effect is not good after maintenance. Content of the Utility Model

[0003] Aiming at the above deficiencies in the prior art, the utility model provides a dry gas seal structure for a pump, and its purpose is to provide a dry gas seal structure that is convenient for quick maintenance and has a good sealing effect when seals such as labyrinth seals, mechanical seals, and packing seals fail.

[0004] In order to achieve the above utility model purpose, the technical scheme adopted by the utility model is as follows:

[0005] A dry gas seal structure for a pump includes a mounting plate. A through hole is provided on the mounting plate. A dry gas seal body is provided on one side of the mounting plate. A sealing ring groove is provided on the side of the mounting plate away from the dry gas seal body. A sealing ring is provided in the sealing ring groove. A shaft sleeve is provided at the end of the dry gas seal body away from the mounting plate. A baffle is provided inside the shaft sleeve.

[0006] Further, the mounting plate is fixedly and sealingly connected to the stationary ring of the dry gas seal body.

[0007] Further, the shaft sleeve is fixedly and sealingly connected to the rotating ring of the dry gas seal body.

[0008] Further, the mounting plate is provided with first mounting holes.

[0009] Further, two symmetrically arranged second mounting holes are provided on the baffle.

[0010] Further, the baffle is fixedly and sealingly connected to the inner wall of the shaft sleeve.

[0011] Further, a keyway is provided on one side of the bushing away from the dry gas seal body.

[0012] The beneficial effects of the present utility model are as follows:

[0013] A dry gas seal structure for a pump of the present utility model is quickly connected to the pump through the provided mounting plate. Through the provided sealing ring, leakage between the pump and the mounting plate is prevented. Through the provided baffle, it can be connected to the output shaft of the pump. Through the provided dry gas seal body, dry gas sealing is performed when the pump is working. Compared with labyrinth seals, mechanical seals, packing seals, etc., the sealing method of the pump can be quickly changed, and the sealing effect is better. Description of the Drawings

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0015] Figure 2 is a three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 3 is an exploded structural schematic diagram of the present utility model.

[0017] Correspondence Table of Reference Numerals in the Drawings:

[0018] 1, mounting plate; 2, through hole; 3, dry gas seal body; 4, sealing ring groove; 5, sealing ring; 6, bushing; 7, baffle; 8, first mounting hole; 9, second mounting hole; 10, keyway. Detailed Embodiments

[0019] The following will further illustrate the detailed embodiments of the present utility model with reference to the drawings. Among them, the same components are denoted by the same reference numerals.

[0020] It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0021] In order to make the content of the present utility model more clearly understood, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

[0022] As Figures 1 to 3 shown, a dry gas seal structure for a pump includes a mounting plate 1. A through hole 2 is formed on the mounting plate 1, and a first mounting hole 8 is provided on the mounting plate 1.

[0023] Pumps are generally driven by motors. The output shaft of the motor is fixedly connected to the output shaft of the pump. The sealing methods between the output shaft of the pump and the pump housing include labyrinth seals, mechanical seals, packing seals, etc.

[0024] After the seal between the output shaft of the pump and the pump housing fails, separate the motor from the pump, drill a threaded hole in the pump housing, and fix the mounting plate 1 to the pump housing with bolts.

[0025] One side of the mounting plate 1 is provided with a dry gas seal body 3, and the mounting plate 1 is fixedly and sealingly connected to the stationary ring of the dry gas seal body 3.

[0026] A sealing ring groove 4 is provided on the side of the mounting plate 1 away from the dry gas seal body 3, and a sealing ring 5 is provided in the sealing ring groove 4. The sealing ring 5 prevents the medium in the pump from overflowing between the pump housing and the mounting plate 1.

[0027] A shaft sleeve 6 is provided at one end of the dry gas seal body 3 away from the mounting plate 1. The shaft sleeve 6 is fixedly and sealingly connected to the moving ring of the dry gas seal body 3. A baffle 7 is provided in the shaft sleeve 6. The baffle 7 is fixedly and sealingly connected to the inner wall of the shaft sleeve 6. Two symmetrically arranged second mounting holes 9 are provided on the baffle 7. Drill two threaded holes in the output shaft of the pump, and fix the baffle 7 to the output shaft of the pump. A rubber pad or the like can be used for sealing between the output shaft of the pump and the baffle 7.

[0028] A keyway 10 is provided on the side of the shaft sleeve 6 away from the dry gas seal body 3. Install the motor on the shaft sleeve 6, and the installation is completed.

[0029] When the pump is running, the dry gas seal body 3 can perform dry gas seal on the pump. The dry gas seal body 3 is a prior art and will not be described in detail here.

[0030] The above are only the preferred embodiments of the utility model patent, and are not intended to limit the utility model patent. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model patent shall be included in the protection scope of the utility model patent.

Claims

1. A dry gas seal structure for a pump, characterized in that: The invention comprises a mounting plate (1), wherein a through hole (2) is formed on the mounting plate (1), a dry gas seal body (3) is formed on one side of the mounting plate (1), a sealing ring groove (4) is formed on the side of the mounting plate (1) away from the dry gas seal body (3), a sealing ring (5) is formed in the sealing ring groove (4), and a shaft sleeve (6) is formed on the end of the dry gas seal body (3) away from the mounting plate (1), and a baffle (7) is formed in the shaft sleeve (6).

2. A dry gas seal structure for a pump according to claim 1, characterized in that: The mounting plate (1) is fixedly and sealingly connected to the stationary ring of the dry gas sealer body (3).

3. A dry gas seal structure for a pump according to claim 1, characterized in that: The shaft sleeve (6) is fixedly and sealingly connected to the dynamic ring of the dry gas sealer body (3).

4. A dry gas seal structure for a pump according to claim 1, characterized in that: The mounting plate (1) is provided with a first mounting hole (8).

5. A dry gas seal structure for a pump according to claim 1, characterized in that: The baffle (7) is provided with two symmetrically arranged second mounting holes (9).

6. A dry gas seal structure for a pump according to claim 1, characterized in that: The baffle (7) is fixedly and sealingly connected to the inner wall of the shaft sleeve (6).

7. A dry gas seal structure for a pump according to claim 1, characterized in that: A keyway (10) is provided on the side of the shaft sleeve (6) away from the dry gas seal body (3).

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