Honeycomb sealing detection device

Abstract

The utility model discloses a honeycomb sealing detection device, which particularly relates to the technical field of sealing detection and comprises a box body, a driving cavity is arranged in the middle of the box body, and an air inlet cavity and a leakage cavity are sequentially arranged on any one of two sides of the box body; the end faces of the two sides of the box body are detachably connected with sealing covers correspondingly. The sealing cover is fixedly provided with a detection device which is communicated with the leakage cavity and is used for measuring the pressure intensity and the leakage amount in the leakage cavity; the sealing device and the detection device are symmetrically arranged on the two sides, sealing detection is conducted on the two sides at the same time, variable consistency can be guaranteed through synchronous rotating speed output by the two ends of the driving motor, balance is conducted through symmetrical arrangement, the stress deviation degrees of shaft bodies on the two sides are the same, measurement accuracy is improved, and comparison reference synchronous measurement is facilitated; the model selection speed is accelerated and the workload is reduced; and the detachable sealing cover, the sealing moving ring and the sealing static ring are arranged, so that measurement of honeycomb seals of different specifications can be realized by replacing the sealing moving ring and the sealing static ring.

Description

Technical Field

[0001] The utility model relates to the technical field of seal detection, and more specifically, to a honeycomb seal detection device. Background Art

[0002] Among the types of steam seals used in the turbomachinery industry, honeycomb seals are widely used due to their advanced seal structures. However, due to the relatively late introduction of technology in China and uneven manufacturing levels, the sealing effects vary greatly. Therefore, it is necessary to test the specifications and performance of honeycomb seals before use to avoid serious leakage accidents during equipment operation.

[0003] However, the existing detection devices still have the following problems during the detection process: 1. It is difficult to control the consistent variables during repeated disassembly and measurement, and it is difficult to screen out unqualified products; 2. When detecting by inflating, the air pressure causes the shaft body to shift, and when detecting by inflating, the air pressure causes the shaft body to be stressed and shift, resulting in increased seal wear and measurement errors; 3. It is difficult to measure honeycomb seals of different specifications. Summary of the Utility Model

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a honeycomb seal detection device.

[0005] To achieve the above object, the utility model provides the following technical solution: A honeycomb seal detection device, comprising a box body, a driving cavity is arranged in the middle of the box body, and an air inlet cavity and a leakage cavity are sequentially arranged on either side; the two end faces of the box body are respectively detachably connected with a sealing cover; the sealing cover is fixed with a detection device communicated with the leakage cavity for measuring the internal pressure and leakage amount of the leakage cavity; a driving motor is installed inside the driving cavity, and the two output ends of the driving motor are fixedly connected with a working shaft, the working shaft is rotationally connected with the box body and penetrates through the corresponding leakage cavity and air inlet cavity, and a rotating seal device is installed at the rotational connection of the working shaft and the box body;

[0006] A sealing dynamic ring is sleeved on the working shaft, and the sealing dynamic ring is located inside the leakage cavity; the sealing dynamic ring is sleeved with a honeycomb seal;

[0007] A sealing static ring matched with the honeycomb seal is further arranged inside the air inlet cavity, and the sealing static ring is detachably connected to the box body;

[0008] The leakage cavity is located between the sealing cover and the corresponding sealing static ring; the air inlet cavity is located between the sealing static ring and the corresponding rotating seal device, and an air inlet hole is opened at the top of the air inlet cavity, and the air inlet hole penetrates through the box body for pressurizing the air inlet cavity to perform multi-level air pressure measurement.

[0009] As a further preference of the present utility model, the detection device includes an exhaust port, a vent valve, a flow meter, and a differential pressure transmitter. The differential pressure transmitter is communicated with the leakage cavity, and a flow meter, a vent valve, and an exhaust port are sequentially communicated above it. The leakage amount at the leakage cavity is measured by the flow meter, and the pressure change is detected by the differential pressure transmitter, avoiding measurement errors caused by abnormal air leakage. The equipped differential pressure transmitter can monitor the gas pressure change in real time, and the reading of the flow meter is the actual leakage amount.

[0010] As a further preference of the present utility model, the rotary seal device includes a lip seal gasket, an angular contact ball bearing, and an end cover. The angular contact ball bearing is arranged between the working shaft and the box body; the end cover is arranged on both sides of the angular contact ball bearing, and the end cover is fixed to the static seal ring, and a second sealing ring is installed at the connection; the lip seal gasket is arranged between the end cover and the angular contact ball bearing and abuts against the working shaft for rotary sealing between the rotary shaft and the box body.

[0011] As a further preference of the present utility model, a first sealing ring abuts against the contact surface between the static seal ring and the box body to improve the sealing performance.

[0012] As a further preference of the present utility model, a working shaft keyway is provided on one side of the working shaft extending into the driving cavity, and a driving shaft keyway is provided at the output end of the driving motor. The working shaft keyway and the corresponding driving shaft keyway on the other side are clamped and linked through a coupling, and the working shaft and the output end of the driving motor are rigidly connected through a coupling for driving the working shaft.

[0013] As a further preference of the present utility model, a box cover is installed on the top of the box body. The box cover is located above the driving cavity and is used to seal the driving cavity. The box cover is convenient to open for the maintenance of the driving motor.

[0014] As a further preference of the present utility model, a retaining ring is sleeved on one side of the working shaft facing the sealing cover. The retaining ring is rotatably connected with the dynamic seal ring to improve the sealing performance and prevent the dynamic seal ring from moving axially.

[0015] As a further preference of the present utility model, the top of the exhaust port is communicated with a gas storage tank, and the two gas storage tanks are communicated to balance the outlet air pressure, avoiding the influence of the external environment and thus reducing errors.

[0016] Technical effects and advantages of the utility model:

[0017] 1. The utility model symmetrically arranges sealing devices and detection devices on both sides, conducts sealing detection simultaneously on both sides, can ensure consistent variables by outputting synchronous speeds at both ends of the driving motor, and achieves balance through symmetric arrangement, so that the stress offset degrees of the shaft bodies on both sides are the same, improves the measurement accuracy, facilitates comparative reference and synchronous measurement, speeds up the selection speed and reduces the workload.

[0018] 2. The utility model is provided with a detachable sealing cover, a sealing dynamic ring and a sealing static ring, which are used to measure honeycomb seals of different specifications by replacing the sealing dynamic ring and the sealing static ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a honeycomb seal detection device of the utility model.

[0020] Figure 2 It is a schematic diagram of the structure of the detection device in a honeycomb seal detection device of the utility model.

[0021] Figure 3 It is a schematic diagram of the partial structure at the connection between the working shaft and the box body of the utility model.

[0022] Figure 4 It is a schematic diagram of the partial structure at the connection between the working shaft and the driving motor of the utility model.

[0023] Reference numerals are: 1. Detection device; 2. Sealing cover; 3. Leakage cavity; 4. Sealing static ring; 5. Honeycomb seal; 6. Sealing dynamic ring; 7. Working shaft; 8. Rotating sealing device; 9. Air inlet hole; 10. Air inlet cavity; 11. Box body; 12. Driving cavity; 13. Box cover; 14. Coupling; 15. Driving motor; 16. Gas storage tank; 101. Exhaust port; 102. Bleed-off valve; 103. Flowmeter; 104. Differential pressure transmitter; 401. First sealing ring; 701. Working shaft key; 702. Retaining ring; 801. Lip seal gasket; 802. Angular contact ball bearing; 803. End cover; 804. Second sealing ring; 1501. Driving shaft key. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0025] As shown in the atta Figures 1-4A honeycomb seal 5 detection device 1 shown in the figure includes a box body 11. A driving cavity 12 is arranged in the middle of the box body 11. An air inlet cavity 10 and a leakage cavity 3 are sequentially arranged on either side of the two sides. Sealing covers 2 are detachably connected to the two end faces of the box body 11 respectively. A detection device 1 communicated with the leakage cavity 3 is fixed on the sealing cover 2 and is used for measuring the internal pressure and leakage amount of the leakage cavity 3.

[0026] A driving motor 15 is installed inside the driving cavity 12. Output ends on both sides of the driving motor 15 are fixedly connected with working shafts 7. The working shafts 7 are rotationally connected with the box body 11. A working shaft key 701 is arranged on one side of the working shaft 7 extending into the driving cavity 12. A driving shaft key 1501 is arranged at the output end of the driving motor 15. The working shaft key 701 and the corresponding driving shaft key 1501 on the corresponding side are clamped and linked through a coupling 14. And a rigid connection is carried out between the working shaft 7 and the output end of the driving motor 15 through the coupling 14 for driving the working shaft 7, and the working shaft 7 penetrates through the corresponding leakage cavity 3 and air inlet cavity 10. A rotating seal device 8 is installed at the rotational connection position of the working shaft 7 and the box body 11. A retaining ring 702 is sleeved on one side of the working shaft 7 facing the sealing cover 2. The retaining ring 702 is rotationally connected with the sealing dynamic ring 6 and is used for improving the sealing performance and preventing the sealing dynamic ring 6 from moving axially.

[0027] The working shaft 7 is sleeved with a sealing dynamic ring 6. The sealing dynamic ring 6 is located inside the leakage cavity 3.

[0028] The sealing dynamic ring 6 is sleeved with a honeycomb seal 5. A sealing static ring 4 matched with the honeycomb seal 5 is also arranged inside the air inlet cavity 10. The sealing static ring 4 is detachably connected to the box body 11. A first sealing ring 401 is abutted on the contact surface between the sealing static ring 4 and the box body 11.

[0029] The leakage cavity 3 is located between the sealing cover 2 and the corresponding sealing static ring 4. The air inlet cavity 10 is located between the sealing static ring 4 and the corresponding rotating seal device 8. An air inlet hole 9 is opened at the top of the air inlet cavity 10. The air inlet hole 9 penetrates through the box body 11 and is used for pressurizing the air inlet cavity 10, performing multi-level air pressure measurement, and improving the measurement consistency through symmetric arrangement on both sides, facilitating quick comparison and screening of the sealing performance of the honeycomb seal 5, and at the same time avoiding wear of the sealing structure caused by force on one side.

[0030] During the working process of the present utility model, the sealing cover 2 is opened, and the sealing static ring 4 and the sealing dynamic ring 6 are replaced to cooperate with honeycomb seals 5 of different specifications, and interference fit is carried out to ensure a stable sealing radius gap.

[0031] Such as Figure 2As shown in the figure, in the embodiment of the present utility model, the detection device 1 includes an exhaust port 101, a vent valve 102, a flowmeter 103, and a differential pressure transmitter 104. The differential pressure transmitter 104 is connected to the leakage cavity 3, and above it are successively connected with a flowmeter 103, a vent valve 102, and an exhaust port 101. The leakage amount at the leakage cavity 3 is measured by the flowmeter 103, and the pressure change is detected by the differential pressure transmitter 104. By comparing the pressure on the other side, it is avoided that inaccurate measurement is caused by gas leakage at other positions, and the reading of the flowmeter 103 is the actual leakage amount.

[0032] In the embodiment of the present utility model, the driving motor 15 is a dual-output motor. During the working process of the present utility model, the rotational speed of the testing machine can be steplessly variable between 0 - 10,000 r / min. Compressed air, after being regulated by a pressure regulating valve, is synchronously introduced into the two intake holes 9 to ensure the same intake air pressure, and then enters the intake cavity 10, and then leaks out from the sealing gap. The magnitude of the air leakage is measured by the flowmeter 103, which is convenient for quick comparison and screening.

[0033] As Figure 3 As shown in the figure, in the embodiment of the present utility model, the rotary seal device 8 includes a lip seal gasket 801, an angular contact ball bearing 802, and an end cover 803. The angular contact ball bearing 802 is arranged between the working shaft 7 and the box body 11; the end cover 803 is arranged on both sides of the angular contact ball bearing 802, and the end cover 803 is fixed to the static seal ring 4, and a second sealing ring 804 is installed at the connection; the lip seal gasket 801 is arranged between the end cover 803 and the angular contact ball bearing 802 and abuts against the working shaft 7 for rotary sealing between the rotating shaft and the box body 11. The selected angular contact ball bearing 802 can bear both radial load and axial load and can work at a relatively high rotational speed. The first sealing ring 401, the second sealing ring 804, and the lip seal gasket 801 are made of nitrile rubber, which can effectively seal in normal temperature and relatively humid environments.

[0034] As Figure 1 As shown in the figure, in the embodiment of the present utility model, a box cover 13 is installed on the top of the box body 11. The box cover 13 is located above the driving cavity 12 and is used to seal the driving cavity 12. After the box cover 13 is opened, it is convenient for the maintenance of the driving motor 15.

[0035] As Figure 2 As shown in the figure, in the embodiment of the present utility model, the top of the exhaust port 101 is connected to a gas storage tank 16, and the two gas storage tanks 16 are connected to balance the outlet air pressure after measurement and avoid the influence of the external environment and thus reduce errors.

[0036] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A honeycomb seal detection device, comprising a box body, characterized in that, A drive cavity is provided in the middle of the box body, and an air inlet cavity and a leakage cavity are sequentially arranged on either side of the two sides; detachable sealing covers are respectively connected to the end faces on both sides of the box body; a detection device communicating with the leakage cavity is fixed on the sealing cover for measuring the internal pressure and leakage amount of the leakage cavity; A drive motor is installed inside the drive cavity, and working shafts are fixedly connected to the output ends on both sides of the drive motor. The working shafts are rotationally connected to the box body and penetrate through the corresponding leakage cavity and air inlet cavity. A rotating sealing device is installed at the rotational connection of the working shafts and the box body; A sealing dynamic ring is sleeved on the working shaft, and the sealing dynamic ring is located inside the leakage cavity; a honeycomb seal is sleeved on the sealing dynamic ring; A sealing static ring cooperating with the honeycomb seal is further provided inside the air inlet cavity, and the sealing static ring is detachably connected to the box body; The leakage cavity is located between the sealing cover and the corresponding sealing static ring; the air inlet cavity is located between the sealing static ring and the corresponding rotating sealing device. An air inlet hole is opened at the top of the air inlet cavity, and the air inlet hole penetrates through the box body.

2. The honeycomb seal detection device according to claim 1, wherein: The detection device includes an exhaust port, a vent valve, a flowmeter and a differential pressure transmitter. The differential pressure transmitter communicates with the leakage cavity, and a flowmeter, a vent valve and an exhaust port are sequentially communicated above it. The leakage amount at the leakage cavity is measured by the flowmeter, and the pressure change is detected by the differential pressure transmitter.

3. A honeycomb seal detection device according to claim 1, characterized in that: The rotating sealing device includes a lip seal gasket, an angular contact ball bearing and an end cover. The angular contact ball bearing is arranged between the working shaft and the box body; the end covers are arranged on both sides of the angular contact ball bearing, and the end covers are fixed to the sealing static ring, and a second sealing ring is installed at the connection; the lip seal gasket is arranged between the end cover and the angular contact ball bearing and abuts against the working shaft.

4. A honeycomb seal detection device according to claim 1, characterized in that: A first sealing ring abuts against the contact surface between the sealing static ring and the box body.

5. A honeycomb seal detection device according to claim 1, characterized in that: A working shaft shaft key is opened on the side where the working shaft extends into the drive cavity, and a drive shaft shaft key is opened at the output end of the drive motor. The working shaft shaft key and the corresponding drive shaft shaft key are clamped and linked through a coupling, and the working shaft and the output end of the drive motor are rigidly connected through a coupling.

6. The honeycomb seal detection device according to claim 1, characterized in that: A box cover is installed on the top of the box body. The box cover is located above the drive cavity and is used to seal the drive cavity.

7. A honeycomb seal detection device according to claim 1, characterized in that: A retaining ring is sleeved on the side of the working shaft facing the sealing cover, and the retaining ring is rotationally connected to the sealing dynamic ring.

8. A honeycomb seal detection device according to claim 2, characterized in that: The top of the exhaust port communicates with a gas storage tank, and the two gas storage tanks communicate with each other.

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