Protection mechanism for sealing ring pressure detection

Abstract

The utility model relates to a protection mechanism for sealing ring pressure detection, which comprises a detection cylinder, a rotating shaft, a sealing ring sleeved on the rotating shaft and positioned in the detection cylinder, and a driving mechanism for driving the rotating shaft to rotate, the rotating shaft is further sleeved with a bearing, the bearing is mounted in a bearing seat, and two ends of the detection cylinder are closed. The end, facing the detection cylinder, of the rotating shaft extends into the detection cylinder, the sealing ring is used for dividing an inner cavity of the detection cylinder into a pressurizing cavity and a pressure maintaining cavity, the detection cylinder is provided with an air inlet and an air outlet which are used for being communicated with the pressurizing cavity, the detection cylinder is further provided with an air inlet pipe and an air outlet pipe which are communicated with the pressure maintaining cavity, and the air inlet pipe is provided with a first electromagnetic switch valve. An air pressure sensor and a second electromagnetic switch valve are arranged on the air outlet pipe. The axial force generated by the pressurizing cavity on the rotating shaft can be counteracted, and the bearing is prevented from being damaged, so that the bearing is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of part detection, and particularly relates to a protection mechanism for seal ring pressure detection. Background Art

[0002] In some high-pressure working conditions, seal rings are required. Therefore, some seal rings need to be tested for their compression conditions under high-pressure working conditions before leaving the factory. As Figure 3 shown, it is an existing detection device, including a detection cylinder body, a rotating shaft, a seal ring sleeved on the rotating shaft and located inside the detection cylinder body, and a motor for driving the rotating shaft to rotate. Both ends of the detection cylinder body are closed. One end of the rotating shaft extends into the detection cylinder body. A bearing is also sleeved outside the rotating shaft, and the bearing is installed on a bearing seat. An air inlet and an air outlet are provided on the detection box. However, when high-pressure gas is filled into the detection box and a pressurized cavity is formed in the inner cavity of the detection box to detect the compression condition of the seal ring, the pressurized cavity will generate a large axial force on the rotating shaft, which is likely to damage the bearing. Content of the Utility Model

[0003] Aiming at the problems existing in the prior art, the utility model provides a protection mechanism for seal ring pressure detection.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a protection mechanism for seal ring pressure detection, including a detection cylinder body, a rotating shaft, a seal ring sleeved on the rotating shaft and located inside the detection cylinder body, and a driving mechanism for driving the rotating shaft to rotate. A bearing is also sleeved on the rotating shaft, and the bearing is installed in a bearing seat. Both ends of the detection cylinder body are closed. One end of the rotating shaft facing the detection cylinder body extends into the detection cylinder body. The seal ring is used to divide the inner cavity of the detection cylinder body into a pressurized cavity and a pressure-holding cavity. An air inlet and an air outlet for communicating with the pressurized cavity are provided on the detection cylinder body. An air inlet pipe and an air outlet pipe communicating with the pressure-holding cavity are also provided on the detection cylinder body. A first electromagnetic switch valve is provided on the air inlet pipe, and a pressure sensor and a second electromagnetic switch valve are provided on the air outlet pipe.

[0005] As a preferred solution, one end of the detection cylinder body facing the rotating shaft is provided with an opening, and a baffle is provided at the opening. A through hole for the rotating shaft to pass through is provided on the baffle, and a leakage space for gas to pass through is formed between the through hole and the rotating shaft.

[0006] As a preferred solution, a third electromagnetic switch valve is provided at the air inlet.

[0007] As a preferred solution, a fourth electromagnetic switch valve is provided at the air outlet.

[0008] As a preferred solution, the diameter of the through hole is larger than the outer diameter of the rotating shaft.

[0009] As a preferred solution, the driving mechanism includes a driving motor, and the output shaft of the driving motor is connected to the rotating shaft through a coupling.

[0010] The beneficial effects of this application are as follows: 1. By providing an intake pipe, high-pressure gas can enter the pressure-holding chamber. With the provision of an outlet pipe, in cooperation with a pressure sensor and a second electromagnetic switching valve,

[0011] it is convenient to adjust the pressure of the pressure-holding chamber, making it easy to equalize the pressure of the pressure-holding chamber with that of the pressurizing chamber, thus offsetting the axial force generated by the pressurizing chamber on the rotating shaft and preventing damage to the bearing, thereby protecting the bearing.

[0012] 2. By providing a leakage space, direct contact between the rotating shaft and the baffle is avoided, reducing the friction with the baffle and ensuring the stability of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is Figure 1 a partial enlarged view of part A in

[0015] Figure 3 a schematic structural diagram of the prior art.

[0016] Reference numerals in the drawings: 1. Detection cylinder body, 11. Pressurizing chamber, 12. Pressure-holding chamber, 13. Baffle, 2. Rotating shaft, 21. Leakage space, 3. Sealing ring, 4. Bearing, 5. Driving motor, 6. Air inlet, 61. Third electromagnetic switching valve, 7. Air outlet, 71. Fourth electromagnetic switching valve, 8. Intake pipe, 81. First electromagnetic switching valve, 9. Outlet pipe, 91. Pressure sensor, 92. Second electromagnetic switching valve, 10. Coupling. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that in the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0018] Please refer to Figure 1-2, an embodiment of the utility model provides a protection mechanism for seal ring pressure detection, which includes a detection cylinder body 1, a rotating shaft 2, a seal ring 3 sleeved on the rotating shaft 2 and located inside the detection cylinder body 1, and a driving mechanism for driving the rotation of the rotating shaft 2. A bearing 4 is also sleeved on the rotating shaft 2, and the bearing 4 is installed in a bearing seat. Both ends of the detection cylinder body 1 are closed, and one end of the rotating shaft 2 facing the detection cylinder body 1 extends into the detection cylinder body 1. The seal ring 3 is used to divide the inner cavity of the detection cylinder body 1 into a pressurizing cavity 11 and a pressure maintaining cavity 12. An air inlet 6 and an air outlet 7 for communicating with the pressurizing cavity 11 are provided on the detection cylinder body 1. An air inlet pipe 8 and an air outlet pipe 9 communicating with the pressure maintaining cavity 12 are also provided on the detection cylinder body 1. A first electromagnetic switch valve 81 is provided on the air inlet pipe 8, and a pressure sensor 91 and a second electromagnetic switch valve 92 are provided on the air outlet pipe 9.

[0019] Among them, as shown in Figure 1 , one end of the detection cylinder body 1 facing the rotating shaft 2 is provided with an opening, and a baffle 13 is provided at the opening. A through hole for the rotating shaft 2 to pass through is provided on the baffle 13, and a leakage space 21 for gas to pass through is formed between the through hole and the rotating shaft 2. It should be noted that parts not detailed in this application are all prior arts.

[0020] Specifically, a third electromagnetic switch valve 61 is provided at the air inlet 6, and a fourth electromagnetic switch valve 71 is provided at the air outlet 7. The diameter of the through hole is larger than the outer diameter of the rotating shaft 2.

[0021] In addition, the driving mechanism includes a driving motor 5. The output shaft of the driving motor 5 is connected to the rotating shaft 2 through a coupling, and the driving motor 5 drives the rotating shaft 2 to rotate.

[0022] In this application, by providing the air inlet pipe 8, high-pressure gas can enter the pressure maintaining cavity 11. By providing the air outlet pipe 9, cooperating with the pressure sensor 92 and the second electromagnetic switch valve 91, it is convenient to adjust the pressure of the pressure maintaining cavity 12, and it is convenient to make the pressure of the pressure maintaining cavity 12 equal to the pressure of the pressurizing cavity 11, so as to offset the axial force generated by the pressurizing cavity 11 on the rotating shaft 2 and avoid damage to the bearing 4, thereby protecting the bearing 4.

[0023] Of course, the utility model is not limited to the above-described embodiments. The following also provides several other embodiments based on the design concept of the utility model.

[0024] For example, in other embodiments, different from the above-described embodiments, the baffle 13 is in a disc shape, and the detection cylinder body 1 is welded to the baffle 13.

[0025] For example, in other embodiments, different from the above-described embodiments, there are two bearings 4, and correspondingly, there are also two bearing seats.

[0026] It should be noted that the above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above embodiments. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A sealing ring pressure detection protection mechanism, characterized in that: The invention comprises a detection cylinder (1), a rotating shaft (2), a sealing ring (3) sleeved on the rotating shaft (2) and located inside the detection cylinder (1), and a driving mechanism for driving the rotating shaft (2) to rotate. The rotating shaft (2) is also sleeved with a bearing (4), which is installed in a bearing seat. Both ends of the detection cylinder (1) are closed, and one end of the rotating shaft (2) facing the detection cylinder (1) extends into the detection cylinder (1). The sealing ring (3) is used to divide the inner cavity of the detection cylinder (1) into a pressurizing cavity (11) and a pressure-maintaining cavity (12). The detection cylinder (1) is provided with an air inlet (6) and an air outlet (7) for communicating with the pressurizing cavity (11). The detection cylinder (1) is also provided with an air inlet pipe (8) and an air outlet pipe (9) for communicating with the pressure-maintaining cavity (12). The air inlet pipe (8) is provided with a first electromagnetic switch valve (81), and the air outlet pipe (9) is provided with an air pressure sensor (91) and a second electromagnetic switch valve (92).

2. A sealing ring pressure detection protection mechanism according to claim 1, characterized in that: An opening is provided at one end of the detection cylinder (1) facing the rotating shaft (2), and a baffle (13) is provided at the opening. A through hole for the rotating shaft (2) to pass through is provided on the baffle (13), and a gas leakage space (21) for gas to pass through is formed between the through hole and the rotating shaft (2).

3. A sealing ring pressure detection protection mechanism according to claim 1, characterized in that: A third electromagnetic switch valve (61) is provided at the air inlet (6).

4. A sealing ring pressure detection protection mechanism according to claim 1, characterized in that: A fourth electromagnetic switch valve (71) is provided at the gas outlet (7).

5. A sealing ring pressure detection protection mechanism according to claim 2, characterized in that: The diameter of the through hole is greater than the outer diameter of the rotating shaft (2).

6. A sealing ring pressure detection protection mechanism according to claim 1, characterized in that: The driving mechanism comprises a driving motor (5), and an output shaft of the driving motor (5) is connected to the rotating shaft (2) via a coupling (10).

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