Air tightness test device for single-end-face mechanical seal with shaft sleeve

Abstract

The utility model discloses a single-end-face mechanical seal air tightness test device with a shaft sleeve, which comprises a shell, the shell is arranged in a water tank, and an air tightness test cavity and a water cavity are arranged in the shell; a fixed ring and a movable ring are arranged on the outer side of the shaft sleeve; a spring is arranged at the bottom of the movable ring; a spring seat is arranged at the bottom of the spring; a second thrust bearing is arranged at the top of the shaft sleeve through a sealing plate; compared with the prior art, the utility model has the advantages that the synchronous air tightness test with the original shaft sleeve can be realized, the shaft sleeve does not need to be disassembled, and the test efficiency is improved; during testing, compression amount adjustment and airtightness inspection during sealing rotation can be realized, and the performance of the mechanical seal is comprehensively detected; during an air tightness test, non-mechanical sealing parts are all soaked in water, leakage of the test device can be visually found, and the test accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seal testing, in particular to an air tightness testing device for a single-end mechanical seal with a shaft sleeve. Background Art

[0002] During the replacement of single-end mechanical seals in centrifugal pumps and other equipment, the traditional sealing inspection method mostly uses non-pressurized kerosene or pressurized water. This method is prone to water or kerosene residue and is not accurate enough for sealing inspection. However, airtightness inspection is more accurate for mechanical seal sealing quality inspection due to the small size of gas molecules.

[0003] Therefore, developing a device capable of performing airtightness tests is of great significance for ensuring the installation quality of mechanical seals. Utility Model Content

[0004] The utility model aims to solve the problems mentioned in the background technology and provides a single-end mechanical seal air tightness test device with a shaft sleeve.

[0005] In order to solve the above technical problems, the utility model provides a technical solution: a single-end mechanical seal airtightness test device with a shaft sleeve, comprising a shell, the shell is arranged in a water pool, the shell includes an airtightness test chamber and a water chamber, and the water chamber is located below the airtightness test chamber;

[0006] A shaft sleeve is provided in the airtight test chamber, a first thrust bearing and a piston are provided at the bottom of the shaft sleeve through a bearing sealing sleeve, a static ring and a dynamic ring are provided on the outside of the shaft sleeve, a spring is provided at the bottom of the dynamic ring, a spring seat is provided at the bottom of the spring, a second thrust bearing is provided at the top of the shaft sleeve through a sealing plate, and the top of the second thrust bearing is connected to the shaft sleeve to fix the pneumatic cylinder through a connecting rod;

[0007] The piston separates the water chamber from the airtight test chamber;

[0008] A stationary ring mounting seat is provided on the top of the housing to achieve quick installation of the stationary ring;

[0009] A pressure pump is provided in the water pool, and the pressure pump is connected to the water cavity through a water pipe;

[0010] The water pool is connected to the water cavity through a water pipe, and is connected to the airtight test cavity through a vent line. The airtight test cavity is provided with a ventilation pipe connected to an air source, and a flow meter and a pressure gauge are provided on the ventilation pipe.

[0011] As a preferred solution, the sleeve-fixing pneumatic cylinder is provided with a controller and is connected to an air source.

[0012] As a preferred solution, a laser rangefinder is provided on the sleeve-fixing pneumatic cylinder to measure the piston height.

[0013] Compared with the prior art, the utility model has the following advantages: a synchronous air tightness test can be carried out with the original shaft sleeve without disassembling the shaft sleeve, thereby improving the test efficiency; during the test, the compression amount can be adjusted and the air tightness check can be carried out when the seal rotates, thereby comprehensively testing the performance of the mechanical seal; during the air tightness test, the non-mechanical seal parts are immersed in water, so the leakage of the test device can be visually found, thereby improving the test accuracy; the test device has a simple structure, is easy to operate, and the test process is quick. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] As shown in the figure: 1. Shell, 2. Water tank, 3. Airtight test chamber, 4. Water chamber, 5. Bushing, 6. Bearing sealing sleeve, 7. First thrust bearing, 8. Piston, 9. Static ring, 10. Moving ring, 11. Spring, 12. Spring seat, 13. Sealing plate, 14. Second thrust bearing, 15. Connecting rod, 16. Bushing fixed pneumatic cylinder, 17. Pressure pump, 18. Vent line, 19. Flow meter, 20. Pressure gauge, 21. Controller, 22. Laser rangefinder, 23. Static ring mounting seat. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0017] In the description of the embodiments of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0018] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0019] In the description of the embodiments of the present invention, "multiple" means at least 2.

[0020] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] In conjunction with the accompanying drawings, a single-end mechanical seal airtightness test device with a shaft sleeve 5 includes a housing 1, the housing 1 is arranged in a water pool 2, the housing 1 includes an airtightness test chamber 3 and a water chamber 4, and the water chamber 4 is located below the airtightness test chamber 3;

[0022] A shaft sleeve 5 is provided in the airtight test chamber 3, a first thrust bearing 7 and a piston 8 are provided at the bottom of the shaft sleeve 5 through a bearing sealing sleeve 6, a static ring 9 and a dynamic ring 10 are provided on the outside of the shaft sleeve 5, a spring 11 is provided at the bottom of the dynamic ring 10, a spring seat 12 is provided at the bottom of the spring 11, a second thrust bearing 14 is provided at the top of the shaft sleeve 5 through a sealing plate 13, and the top of the second thrust bearing 14 is connected to the shaft sleeve fixing pneumatic cylinder 16 through a connecting rod 15, and the first thrust bearing 7 and the second thrust bearing 14 function to simulate the airtightness test under the rotating working condition of the mechanical seal;

[0023] The piston 8 separates the water chamber 4 from the airtight test chamber 3;

[0024] A stationary ring mounting seat 23 is provided on the top of the housing 1 to achieve quick installation of the stationary ring 9;

[0025] A pressure pump 17 is provided in the water pool 2, and the pressure pump 17 is connected to the water chamber 4 through a water pipe, and is used to adjust the height of the piston, which is to adjust the compression amount of the mechanical seal;

[0026] The water pool 2 is connected to the water chamber 4 through a water pipe, and is connected to the airtight test chamber 3 through a vent line 18. The airtight test chamber 3 is provided with a ventilation pipe connected to an air source, and a flow meter 19 and a pressure gauge 20 are provided on the ventilation pipe.

[0027] The shaft sleeve fixing pneumatic cylinder 16 is provided with a controller 21 and is connected to an air source.

[0028] The sleeve fixing pneumatic cylinder 16 is provided with a laser rangefinder 22 for measuring the height of the piston 8 .

[0029] When the utility model is implemented, a synchronous air tightness test can be carried out with the original shaft sleeve without removing the shaft sleeve, thereby improving the test efficiency; during the test, the compression amount can be adjusted and the air tightness check can be carried out when the seal rotates, thereby comprehensively detecting the performance of the mechanical seal; during the air tightness test, the non-mechanical seal parts are immersed in water, so the leakage of the test device can be intuitively found, thereby improving the test accuracy; the test device has a simple structure, is easy to operate, and the test process is quick.

[0030] The above describes the utility model and its implementation methods, which are not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and do not deviate from the purpose of the invention of the utility model, they can creatively design a structure and embodiment similar to the technical solution, which should belong to the protection scope of the utility model.

Claims

1. A single-end mechanical seal air tightness test device with a sleeve, characterized in that: It comprises a shell, wherein the shell comprises an airtight test chamber and a water chamber, and the water chamber is located below the airtight test chamber; A shaft sleeve is provided in the airtight test chamber, a first thrust bearing and a piston are provided at the bottom of the shaft sleeve through a bearing sealing sleeve, a static ring and a dynamic ring are provided on the outside of the shaft sleeve, a spring is provided at the bottom of the dynamic ring, a spring seat is provided at the bottom of the spring, a second thrust bearing is provided at the top of the shaft sleeve through a sealing plate, and the top of the second thrust bearing is connected to the shaft sleeve to fix the pneumatic cylinder through a connecting rod; The piston separates the water chamber from the airtight test chamber; A stationary ring mounting seat is provided on the top of the housing to achieve quick installation of the stationary ring; A pressure pump is provided on the side of the shell, and the pressure pump is connected to the water cavity through a water pipe; The airtight test chamber is provided with a ventilation pipe connected to an air source, and the ventilation pipe is provided with a flow meter and a pressure gauge.

2. The air tightness test device of a single-end mechanical seal with a sleeve according to claim 1, characterized in that: The shaft sleeve fixing pneumatic cylinder is provided with a controller and is connected to an air source.

3. The air tightness test device of a single-end mechanical seal with a sleeve according to claim 1, characterized in that: The shaft sleeve fixing pneumatic cylinder is provided with a laser rangefinder for measuring the piston height.

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