Pressure-adjustable mechanical sealing element

Abstract

The utility model relates to the technical field of mechanical sealing elements, in particular to a pressure-adjustable mechanical sealing element which comprises a rotating shaft, a base and an adjusting assembly, the base is arranged on the surface of the rotating shaft, a movable ring module is installed on the surface of the rotating shaft, a static ring is installed on the inner wall of the base, the static ring is arranged on the surface of the rotating shaft in a sleeved mode, and the adjusting assembly is arranged on the rotating shaft. The static ring abuts against the sealing end of the movable ring module, and the adjusting assembly is arranged on the surface of the rotating shaft. The adjusting assembly comprises a limiting unit, the limiting unit comprises a T-shaped lantern ring, the T-shaped lantern ring is connected with the surface of the rotating shaft in a sleeved mode, a threaded hole is formed in the outer circumference of the T-shaped lantern ring, and an anti-loose gasket is installed on the portion, located on the inner wall of the threaded hole, of the T-shaped lantern ring. According to the mechanical sealing element, the adjusting assembly is arranged, so that the adjusting operation of the mechanical sealing element is more convenient, the problems that the adjusting structure of the mechanical sealing element is tedious and the applicability is poor are solved, and the applicability and the adjusting efficiency of the mechanical sealing element are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a pressure-adjustable mechanical seal. Background Art

[0002] Mechanical seals are one of the basic mechanical components with high precision and complex structure. They are key components of various pumps, reaction synthesis kettles, turbine compressors, submersible motors and other equipment. They can effectively prevent the sealed medium (such as liquid, gas, etc.) from leaking from the gap between the rotating shaft and the stationary parts, ensure the sealing performance of the equipment or system, maintain normal working pressure and prevent medium loss.

[0003] Prior art includes a utility model with publication number CN117869590A, which discloses a pressure-adjustable mechanical seal. The patent adopts a sealing shaft, an adjusting component is arranged inside the sealing shaft, a fixing component is arranged on the outer wall of the sealing shaft, the sealing shaft is plugged into the interior of the sealing component, the adjusting component includes a slot, the slot is opened at one end of the sealing shaft, a plug rod is plugged into the interior of the slot, a first screw hole is opened at one end of the plug rod, a first screw rod is connected to the internal thread of the first screw hole, the upper end of the first screw rod is slidably connected to the interior of the first clamping groove, the plug rod is driven to move by pushing the first screw rod, the plug rod drives the second screw rod to move, the second screw pushes the collar, and then the collar is adjusted to squeeze the spring so that the spring The elastic force changes, so that the pressure on the sliding ring can be adjusted, so that the sliding ring and the cone ring maintain a stable extrusion state, thus solving the problem of severe wear of the sliding ring or insufficient sealing shape, and solving the problem that the existing mechanical seal squeezes the sealing ring through the compensation mechanism, so that the mechanical seal always maintains a sufficient sealing effect. However, if the pressure provided by the spring is too low, the sealing effect of the sealing ring will be damaged. If the pressure provided by the spring is too large, the friction force on the sealing ring will increase, which will reduce the service life of the sealing ring. In addition, the friction surface of the existing sealing ring is a flat surface. When a concave friction surface is generated on the surface after friction, the sealing effect of the sealing ring will be damaged.

[0004] The inventors have discovered in their daily work that in the process of sealing equipment with the help of mechanical seals, there are existing adjustable mechanical seals such as the above-mentioned ones, whose adjustment structure design is complex and the operation is cumbersome. In addition, during the design, part of the structure is located inside the rotating shaft, which makes it difficult to set the adjustment structure. When faced with a rotating shaft of standard specifications, its adjustment structure is difficult to achieve the adjustment effect, which makes the adjustment structure less applicable and difficult to popularize. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that when facing a rotating shaft of standard specifications, its adjustment structure is difficult to achieve the adjustment effect, making the adjustment structure less applicable and difficult to popularize and utilize, and proposes a pressure-adjustable mechanical seal.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a pressure-adjustable mechanical seal, comprising a rotating shaft, a base and an adjusting assembly, wherein the base is arranged on the surface of the rotating shaft, a dynamic ring module is installed on the surface of the rotating shaft, a static ring is installed on the inner wall of the base, the static ring is sleeved on the surface of the rotating shaft, the static ring abuts against the sealing end of the dynamic ring module, and the adjusting assembly is arranged on the surface of the rotating shaft;

[0007] The adjustment assembly includes a limiting unit, and the limiting unit includes a T-shaped collar, the T-shaped collar is sleeved with the surface of the rotating shaft, a threaded hole is provided on the outer circumference of the T-shaped collar, an anti-loosening gasket is installed on the inner wall of the threaded hole of the T-shaped collar, a fastening bolt is threadedly connected to the inner wall of the threaded hole of the T-shaped collar, the fastening bolt abuts against the arc surface of the rotating shaft, a groove is provided on the outer circumference of the T-shaped collar, and a limiting hole is provided on the side surface of the T-shaped collar;

[0008] The adjustment assembly also includes an extrusion unit, which includes a guide column, which is fixedly connected to the side surface of the T-shaped ring, a guide sleeve is sleeved on the surface of the guide column, an extrusion ring is fixedly connected to the side surface of the guide sleeve, the extrusion ring abuts against the side surface of the dynamic ring module, the side surface of the extrusion ring is fixedly connected to a threaded sleeve, the T-shaped ring is rotatably connected to the inner wall of the limiting hole with an adjusting bolt, and the adjusting bolt is threadedly connected to the inner wall of the threaded sleeve.

[0009] Preferably, the number of the threaded holes is three, and the three threaded holes are arranged in a circular array about the T-shaped ring. The threaded holes opened on the surface of the T-shaped ring allow the operator to install the fastening bolt, so that the fastening bolt can be tightened in the threaded hole and the T-shaped ring is locked to the surface of the rotating shaft.

[0010] Preferably, the anti-loosening gasket is socketed with the threaded portion of the fastening bolt, and the number of the fastening bolts is three. The three fastening bolts are arranged in a circular array about the rotating shaft, and the fastening bolt abuts against the surface of the anti-loosening gasket. By installing the anti-loosening gasket on the surface of the fastening bolt, the stability of the fastening bolt in the fastened state can be increased, and the firmness of the fastening bolt can be improved.

[0011] Preferably, the groove is located directly below the limiting hole, and the inner wall of the groove is arranged in an arc shape. By opening the groove directly below the limiting hole, it is convenient for the staff to insert the tool into the slot on the surface of the adjusting bolt to perform the adjustment operation.

[0012] Preferably, there are two guide pillars, which are symmetrically arranged about the rotating shaft. The guide sleeve matches the number of guide pillars. Through the cooperation between the guide sleeve and the guide pillar, the position of the extrusion ring can be constrained and the stability of the extrusion ring in the moving state can be ensured.

[0013] Preferably, the extrusion ring is sleeved with the surface of the rotating shaft, and the height of the threaded sleeve is equal to that of the guide sleeve. By installing the extrusion ring at the junction of the rotating shaft and the dynamic ring module, when the staff rotates the adjusting bolt, the adjusting bolt and the threaded sleeve can be used to extrude the dynamic ring module, thereby adjusting the moving range of the dynamic ring module to achieve the adjustment of the sealing pressure.

[0014] Compared with the prior art, the advantages and positive effects of the utility model are:

[0015] In the utility model, by setting an adjustment component, when the pressure of the mechanical seal needs to be adjusted, the adjusting bolt is rotated, and the adjusting bolt rotates under the constraint of the T-shaped ring. The adjusting bolt engages with the threaded sleeve when rotating, and the threaded sleeve pushes the extrusion ring when engaging with the adjusting bolt. The extrusion ring is displaced under the guidance of the guide sleeve and the guide column, and squeezes the dynamic ring module during the movement. Under the extrusion of the extrusion ring, the movable distance of the dynamic ring module is compressed, and at the same time, the spring in the dynamic ring module is squeezed, and the pressure between the dynamic ring module and the static ring is increased, and then the pressure of the mechanical seal can be adjusted. By setting the adjustment component, the adjustment operation of the mechanical seal is more convenient, thereby reducing the problems of complicated adjustment structure and poor applicability of the mechanical seal, and further improving the applicability and adjustment efficiency of the mechanical seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of a pressure-adjustable mechanical seal is provided for the utility model;

[0017] Figure 2 A schematic cross-sectional structure diagram of a pressure-adjustable mechanical seal is provided for the utility model;

[0018] Figure 3 The utility model provides a schematic diagram of the structure of a mechanical seal with adjustable pressure when viewed from above;

[0019] Figure 4 A schematic diagram of the structure of an adjustment component of a pressure-adjustable mechanical seal is provided for the utility model;

[0020] Figure 5 The utility model proposes a pressure-adjustable mechanical seal Figure 4 Schematic diagram of the structure at point A in the middle.

[0021] Legend:

[0022] 1. Rotating shaft; 2. Base; 3. Moving ring module; 4. Static ring; 5. Adjusting assembly; 51. Limiting unit; 511. T-shaped collar; 512. Threaded hole; 513. Anti-loosening gasket; 514. Fastening bolt; 515. Groove; 516. Limiting hole; 52. Extrusion unit; 521. Guide column; 522. Guide sleeve; 523. Extrusion ring; 524. Threaded sleeve; 525. Adjusting bolt. DETAILED DESCRIPTION

[0023] See also Figure 1-5 The utility model provides a technical solution: a pressure-adjustable mechanical seal, including a rotating shaft 1, a base 2 and an adjusting component 5, the base 2 is arranged on the surface of the rotating shaft 1, a dynamic ring module 3 is installed on the surface of the rotating shaft 1, a static ring 4 is installed on the inner wall of the base 2, the static ring 4 is sleeved on the surface of the rotating shaft 1, the static ring 4 abuts against the sealing end of the dynamic ring module 3, and the adjusting component 5 is arranged on the surface of the rotating shaft 1.

[0024] In this embodiment: the adjustment component 5 includes a limiting unit 51, which includes a T-shaped collar 511, which is sleeved with the surface of the rotating shaft 1, and a threaded hole 512 is provided on the outer circumference of the T-shaped collar 511, and a locking gasket 513 is installed on the inner wall of the threaded hole 512 of the T-shaped collar 511, and a fastening bolt 514 is threadedly connected to the inner wall of the threaded hole 512 of the T-shaped collar 511, and the fastening bolt 514 abuts against the arc surface of the rotating shaft 1, and a groove 515 is provided on the outer circumference of the T-shaped collar 511, and a limiting hole 516 is provided on the side surface of the T-shaped collar 511;

[0025] The adjustment component 5 also includes an extrusion unit 52, which includes a guide column 521, which is fixedly connected to the side surface of the T-shaped ring 511, and a guide sleeve 522 is sleeved on the surface of the guide column 521. The side surface of the guide sleeve 522 is fixedly connected with an extrusion ring 523, which abuts against the side surface of the dynamic ring module 3, and the side surface of the extrusion ring 523 is fixedly connected with a threaded sleeve 524. The T-shaped ring 511 is rotatably connected to the inner wall of the limiting hole 516 with an adjusting bolt 525, and the adjusting bolt 525 is threadedly connected to the inner wall of the threaded sleeve 524.

[0026] Specifically, there are three threaded holes 512, which are arranged in a circular array about the T-shaped ring 511. The threaded holes 512 opened on the surface of the T-shaped ring 511 allow the operator to install the fastening bolt 514, so that the fastening bolt 514 can be tightened in the threaded holes 512 and the T-shaped ring 511 is locked to the surface of the rotating shaft 1.

[0027] Specifically, the anti-loosening gasket 513 is sleeved with the threaded portion of the fastening bolt 514 . There are three fastening bolts 514 . The three fastening bolts 514 are arranged in a circular array about the rotating shaft 1 . The fastening bolts 514 abut against the surface of the anti-loosening gasket 513 .

[0028] In this embodiment, the anti-loosening gasket 513 installed on the surface of the fastening bolt 514 can increase the stability of the fastening bolt 514 in the fastened state, thereby improving the firmness of the fastening bolt 514.

[0029] Specifically, the groove 515 is located directly below the limiting hole 516, and the inner wall of the groove 515 is arranged in an arc shape. By providing the groove 515 directly below the limiting hole 516, it is convenient for the staff to insert the tool into the slot on the surface of the adjusting bolt 525 to perform the adjustment operation.

[0030] In this embodiment, there are two guide posts 521 , which are disposed symmetrically with respect to the rotating shaft 1 , and the number of the guide sleeves 522 matches that of the guide posts 521 .

[0031] In this embodiment, the position of the extrusion ring 523 can be constrained by the cooperation between the guide sleeve 522 and the guide column 521, and the stability of the extrusion ring 523 in the moving state can be ensured.

[0032] Specifically, the extrusion ring 523 is sleeved on the surface of the rotating shaft 1, and the height of the threaded sleeve 524 is equal to that of the guide sleeve 522. By installing the extrusion ring 523 at the connection between the rotating shaft 1 and the dynamic ring module 3, when the staff rotates the adjusting bolt 525, the adjusting bolt 525 and the threaded sleeve 524 can be used to extrude the dynamic ring module 3, thereby adjusting the moving range of the dynamic ring module 3 to achieve the adjustment of the sealing pressure.

[0033] Working principle: when the pressure of the mechanical seal needs to be adjusted, the adjusting bolt 525 is rotated. The adjusting bolt 525 rotates under the constraint of the T-shaped collar 511. The adjusting bolt 525 engages with the threaded sleeve 524 when rotating. When the threaded sleeve 524 engages with the adjusting bolt 525, it pushes the extrusion ring 523. The extrusion ring 523 is displaced under the guidance of the guide sleeve 522 and the guide column 521, and squeezes the dynamic ring module 3 during the movement. Under the squeezing of the extrusion ring 523, the movable distance of the dynamic ring module 3 is compressed. At the same time, the spring in the dynamic ring module 3 is squeezed and the pressure between the dynamic ring module 3 and the static ring 4 is increased. Then, the pressure of the mechanical seal can be adjusted. By setting the adjustment component 5, the adjustment operation of the mechanical seal is more convenient, thereby reducing the cumbersome adjustment structure of the mechanical seal and the poor applicability, and further improving the applicability and adjustment efficiency of the mechanical seal.

Claims

1. A pressure-adjustable mechanical seal, comprising a rotating shaft (1), a base (2) and an adjustment assembly (5), characterized in that: The base (2) is arranged on the surface of the rotating shaft (1), a dynamic ring module (3) is installed on the surface of the rotating shaft (1), a static ring (4) is installed on the inner wall of the base (2), the static ring (4) is sleeved on the surface of the rotating shaft (1), the static ring (4) abuts against the sealing end of the dynamic ring module (3), and the adjustment component (5) is arranged on the surface of the rotating shaft (1); The adjustment assembly (5) comprises a limiting unit (51), the limiting unit (51) comprising a T-shaped collar (511), the T-shaped collar (511) being sleeved with the surface of the rotating shaft (1), the outer circumference of the T-shaped collar (511) being provided with a threaded hole (512), the inner wall of the threaded hole (512) of the T-shaped collar (511) being provided with an anti-loosening gasket (513), the inner wall of the threaded hole (512) of the T-shaped collar (511) being threadedly connected with a fastening bolt (514), the fastening bolt (514) being in contact with the arc surface of the rotating shaft (1), the outer circumference of the T-shaped collar (511) being provided with a groove (515), and the side surface of the T-shaped collar (511) being provided with a limiting hole (516); The adjustment assembly (5) further comprises an extrusion unit (52), wherein the extrusion unit (52) comprises a guide column (521), wherein the guide column (521) is fixedly connected to the side surface of the T-shaped collar (511), wherein a guide sleeve (522) is sleeved on the surface of the guide column (521), wherein the side surface of the guide sleeve (522) is fixedly connected to an extrusion ring (523), wherein the extrusion ring (523) abuts against the side surface of the dynamic ring module (3), wherein the side surface of the extrusion ring (523) is fixedly connected to a threaded sleeve (524), wherein an adjustment bolt (525) is rotatably connected to the inner wall of the T-shaped collar (511) located at the limiting hole (516), wherein the adjustment bolt (525) is threadedly connected to the inner wall of the threaded sleeve (524).

2. A pressure-adjustable mechanical seal according to claim 1, characterized in that: The number of the threaded holes (512) is three, and the three threaded holes (512) are arranged in a circular array about the T-shaped collar (511).

3. A pressure-adjustable mechanical seal according to claim 1, characterized in that: The anti-loosening gasket (513) is sleeved with the threaded portion of the fastening bolt (514); the number of the fastening bolts (514) is three; the three fastening bolts (514) are arranged in a circular array about the rotating shaft (1); the fastening bolts (514) abut against the surface of the anti-loosening gasket (513).

4. A pressure-adjustable mechanical seal according to claim 1, characterized in that: The groove (515) is located directly below the limiting hole (516), and the inner wall of the groove (515) is arranged in an arc shape.

5. The pressure-adjustable mechanical seal according to claim 1, characterized in that: The number of the guide posts (521) is two, and the two guide posts (521) are arranged symmetrically with respect to the rotating shaft (1), and the number of the guide sleeves (522) matches that of the guide posts (521).

6. A pressure-adjustable mechanical seal according to claim 1, characterized in that: The extrusion ring (523) is sleeved with the surface of the rotating shaft (1), and the height of the threaded sleeve (524) is equal to that of the guide sleeve (522).

Images