Dynamic seal leakage characteristic testing device

Abstract

The invention discloses a dynamic seal leakage characteristic test device, which comprises a shell, end covers, a rotating shaft, two turntables, a radial displacement adjusting structure, a temperature sensor, a pressure sensor and a flowmeter, and is characterized in that the end covers are cooperatively installed at two ends of the shell and then cooperatively installed on the rotating shaft, the middle part of the shell is provided with an air inlet, the end covers are provided with air outlets, and the number of the turntables is two; the two rotating discs are installed on the periphery of the rotating shaft in a spaced mode and located on the two sides of the air inlet, the peripheries of the rotating discs and the inner periphery of the shell form an annular cavity used for installing a dynamic seal test piece, and the radial displacement adjusting structure is connected with the shell and used for driving the shell to move in the radial direction of the rotating shaft. And the temperature sensor, the pressure sensor and the flowmeter are respectively used for monitoring the temperature and the pressure at the air inlet and the air flow at the air outlet. The dynamic seal leakage characteristic test device can measure the leakage rate of the brush seal under the conditions of different pressure differences, different temperatures and different rotating speeds, and can simulate the radial interference working condition under the impact of a large load.

Description

Technical Field

[0001] The invention relates to the technical field of dynamic seal testing, and in particular provides a dynamic seal leakage characteristic testing device. Background Art

[0002] Dynamic seals are key components in mechanical equipment that prevent fluid leakage. They are widely used in applications involving rotating, reciprocating, or spiral motion, such as engines, hydraulic systems, and compressors. Dynamic seals include brush seals, fingertip seals, graphite seals, lip seals, and grate seals.

[0003] Studying the leakage characteristics of dynamic seals under actual working conditions is of great engineering significance. However, existing dynamic seal leakage characteristic test equipment usually detects the sealing leakage characteristics under stable conditions and cannot simulate the leakage characteristics under large impact load radial interference conditions.

[0004] Therefore, providing a dynamic seal leakage characteristic test device that can simulate the radial interference state of a large impact load has become an urgent problem to be solved. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a dynamic seal leakage characteristic test device to at least solve the problems existing in the prior art.

[0006] The technical solution provided by the present invention is: a dynamic seal leakage characteristic test device, comprising: a shell, an end cover, a rotating shaft, a rotating disk, a radial displacement adjustment structure, a temperature sensor, a pressure sensor and a flow meter, wherein the shell is cylindrical and fixedly arranged, the middle part of the shell is provided with air inlets at intervals along the circumferential direction, the end covers are two and are respectively mounted on the two ends of the shell, the end covers are provided with a rotating shaft mounting hole and an air outlet, the rotating shaft mounting hole is located in the middle part of the end cover, the air outlet is centered on the rotating shaft mounting hole and is evenly arranged along the circumference of the rotating shaft mounting hole, the rotating shaft is fixedly arranged, and the shell and the end covers are connected by a rotating shaft mounting hole. The shaft mounting hole is fitted on the outer side of the shaft, there are two turntables, which are installed at intervals on the outer periphery of the shaft and located on both sides of the air inlet, and the outer periphery of the turntable and the inner periphery of the shell are spaced apart to form an annular cavity for correspondingly installing the rotating part and the stationary part of the dynamic sealing test piece, the air inlet and the air outlet are connected in the shell only through the annular cavity, the radial displacement adjustment structure is connected to the shell, and is used to drive the shell to move radially along the shaft, and the temperature sensor, pressure sensor and flow meter are used to monitor the temperature and pressure at the air inlet and the gas flow at the air outlet respectively.

[0007] Preferably, the radial displacement adjustment structure includes a first support frame and a first slide, and the housing is mounted on the first support frame via the first slide and can move radially relative to the rotating shaft driven by the first slide.

[0008] Further preferably, the first support frame is a rectangular frame structure consisting of a first bottom plate, four first side plates arranged at intervals and a top plate, there are four first slides and they are correspondingly installed on the inner sides of the four first side plates, and the shell is located on the inner sides of the four first slides and is fixedly connected to the sliders on the first slides respectively.

[0009] Further preferably, the dynamic seal leakage characteristic test device also includes a rotation drive structure, wherein the rotation drive structure includes a second support frame and a drive motor, the drive motor is fixedly mounted on the second support frame and the output shaft is connected to the radial displacement adjustment structure, and is used to drive the shell to rotate by driving the radial displacement adjustment structure to rotate, wherein the output shaft of the drive motor is arranged perpendicular to the rotating shaft.

[0010] Further preferably, the second support frame includes a second base plate and two second side plates, the two second side plates are respectively vertically connected to the two ends of the second base plate, the drive motor is installed on one second side plate and the output shaft is connected to one side of the radial displacement adjustment structure, and the other second side plate is rotatably connected to the other side of the radial displacement adjustment structure.

[0011] Further preferably, the dynamic seal leakage characteristic test device also includes an axial displacement adjustment structure, which includes a third support frame and a second slide. The shell is installed on the third support frame through the second slide and can move axially relative to the rotating shaft under the drive of the second slide. The outer periphery of the turntable is arranged in a stepped shape along the axial direction of the rotating shaft.

[0012] Further preferably, one end of the rotating shaft is connected to the output shaft of the fixed motor, and the other end is mounted on a fixed bearing seat.

[0013] Further preferably, the rotating shaft is arranged horizontally.

[0014] Further preferably, the gas outlet is provided with a temperature measuring point for detecting the gas temperature at the gas outlet.

[0015] The dynamic seal leakage characteristic test device provided by the present invention has a reasonable structure and can measure the leakage amount of the dynamic seal test piece under different pressure difference, different temperature and different speed conditions. It can also simulate the radial interference working condition under large impact load, and thus obtain the leakage data under the corresponding working condition. Among them, adjusting the rotation speed of the rotating shaft can simulate different rotation speeds of the rotor, the pressure sensor and the temperature sensor can monitor the pressure and temperature of the air inlet in real time, the flow meter can detect the gas flow rate of the air outlet, and the radial displacement adjustment structure can adjust the radial offset between the shell and the rotating shaft, and thus obtain the leakage amount under the corresponding conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments: Figure 1 A schematic structural diagram of a dynamic seal leakage characteristic test device provided by the present invention; Figure 2 This is a cross-sectional view of the dynamic seal leakage characteristic test device provided by the present invention. DETAILED DESCRIPTION

[0017] The present invention will be further explained below with reference to specific embodiments, but the present invention is not limited thereto.

[0018] In order to simulate the radial interference working condition of the engine under large load impact, the leakage data under the radial interference state between the shaft and the seal is obtained, such as Figure 1 、 Figure 2As shown, the present invention provides a dynamic seal leakage characteristic test device, comprising: a shell 1, an end cover 2, a rotating shaft 3, a turntable 4, a radial displacement adjustment structure, a temperature sensor (not shown in the figure), a pressure sensor (not shown in the figure) and a flow meter (not shown in the figure), wherein the shell 1 is cylindrical and fixedly arranged, and an air inlet 11 is arranged at intervals along the circumferential direction in the middle part of the shell 1, and the end cover 2 is two and respectively mounted on the two ends of the shell 1, and a rotating shaft mounting hole and an air outlet 21 are provided on the end cover 2, and the rotating shaft mounting hole is located in the middle part of the end cover 2, and the air outlet 21 is centered on the rotating shaft mounting hole and is evenly arranged along the circumference of the rotating shaft mounting hole, the rotating shaft 3 is fixedly arranged, and the shell 1 and the end cover 2 are matched through the rotating shaft mounting hole. It is mounted on the outside of the rotating shaft 3, and there are two turntables 4. The two turntables 4 are installed at intervals on the outer periphery of the rotating shaft 3 and are located on both sides of the air inlet 11. The outer periphery of the turntable 4 and the inner periphery of the shell 1 are arranged at intervals to form an annular cavity for correspondingly installing the rotating parts and stationary parts of the dynamic sealing test piece. The air inlet 11 and the air outlet 21 are connected in the shell 1 only through the annular cavity. The radial displacement adjustment structure is connected to the shell 1 to drive the shell 1 to move radially along the rotating shaft 3. The temperature sensor, pressure sensor and flow meter are respectively used to monitor the temperature and pressure at the air inlet 11 and the gas flow at the air outlet 21. The flow meter can be installed only at the air outlet on one side or at the air outlets on both sides at the same time.

[0019] The dynamic seal leakage characteristic test device has a reasonable structure and can measure the leakage of the dynamic seal test piece under different pressure differences, different temperatures, and different speeds. It can also simulate radial interference working conditions under large impact loads, and thus obtain leakage data under corresponding working conditions. Among them, adjusting the rotation speed of the rotating shaft can simulate different rotation speeds of the rotor, the pressure sensor and temperature sensor can monitor the pressure and temperature of the air inlet in real time, the flow meter can detect the gas flow rate of the air outlet, and the radial displacement adjustment structure can adjust the radial offset between the shell and the rotating shaft, and thus obtain the seal leakage under corresponding working conditions.

[0020] As an improvement of the technical solution, Figure 2 As shown, the radial displacement adjustment structure includes a first support frame 51 and a first slide 52 . The housing 1 is mounted on the first support frame 51 via the first slide 52 and can move radially relative to the rotating shaft 3 driven by the first slide 52 .

[0021] As an improvement of the technical solution, Figure 1 、 Figure 2As shown, the first support frame 51 is a rectangular frame structure consisting of a first bottom plate, four first side plates arranged at intervals and a top plate. There are four first slides 52 and they are correspondingly installed on the inner sides of the four first side plates. The shell 1 is located on the inner sides of the four first slides 52 and is fixedly connected to the sliders on the first slides 52 respectively. The sliding structure is an existing structure and will not be described here. Preferably, a support block with a flat bottom surface and a top surface that cooperates with the outer periphery of the shell 1 is fixedly installed at the bottom of the shell 1, and the sliders on the four first slides 52 are fixedly connected to the four corner positions of the support block respectively.

[0022] As an improvement of the technical solution, Figure 1 、 Figure 2 As shown, the dynamic seal leakage characteristic test device also includes a rotation drive structure, wherein the rotation drive structure includes a second support frame 71 and a drive motor (not shown in the figure), the drive motor is fixedly mounted on the second support frame 71 and the output shaft is connected to the radial displacement adjustment structure, and is used to drive the shell 1 to rotate by driving the radial displacement adjustment structure to rotate, wherein the output shaft of the drive motor is arranged perpendicular to the rotating shaft 3, which can simulate the working condition where the sealing cavity and the rotating shaft form an angle.

[0023] As an improvement of the technical solution, Figure 1 、 Figure 2 As shown, the second support frame 71 includes a second base plate and two second side plates, the two second side plates are respectively vertically connected to the two ends of the second base plate, the drive motor is installed on one second side plate and the output shaft is connected to one side of the radial displacement adjustment structure, and the other second side plate is rotatably connected to the other side of the radial displacement adjustment structure. Preferably, additional side plates connected to the rotation drive structure are fixedly provided on both sides of the radial displacement adjustment structure, and the drive motor can drive the second side plates connected thereto to rotate, thereby driving the radial displacement adjustment structure to rotate.

[0024] As an improvement of the technical solution, Figure 1 、 Figure 2 As shown, the dynamic seal leakage characteristic test device also includes an axial displacement adjustment structure, which includes a third support frame 81 and a second slide 82. The housing 1 is mounted on the third support frame 81 through the second slide 82 and can be axially moved relative to the rotating shaft 3 under the drive of the second slide 82. The outer periphery of the turntable 4 is arranged in a stepped shape along the axial direction of the rotating shaft 3. In the above structure, the sealing gap of the dynamic seal test piece installed in the annular cavity can be adjusted by driving the housing 1 along the axial movement of the rotating shaft 3 through the axial displacement adjustment structure, thereby avoiding the problem of frequently replacing the rotating shaft to adjust the sealing gap. Preferably, as Figure 1 、 Figure 2 As shown, the rotation drive structure is installed across the two second slides, and is used to drive the shell to move axially along the rotating shaft under the drive of the axial displacement adjustment structure.

[0025] As an improvement of the technical solution, Figure 1 、 Figure 2 As shown, one end of the rotating shaft 3 is connected to the output shaft of the fixed motor, and the other end is installed on a fixed bearing seat.

[0026] As an improvement of the technical solution, Figure 1 、 Figure 2 As shown, the rotating shaft 3 is arranged horizontally.

[0027] As an improvement to the technical solution, the gas outlet 21 is provided with a temperature measuring point for detecting the gas temperature at the gas outlet. The temperature information of the gas outlet can be used to evaluate the frictional heat characteristics of the dynamic seal.

[0028] The detailed description of the present invention is written in a progressive manner, emphasizing the differences between the various implementation schemes, and similar parts thereof can be referenced to each other.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in this field without departing from the scope of the present invention.

Claims

1. A dynamic seal leakage characteristic test device, characterized in that: include: A shell (1), an end cover (2), a rotating shaft (3), a rotating disk (4), a radial displacement adjustment structure, a temperature sensor, a pressure sensor and a flow meter, wherein the shell (1) is cylindrical and fixedly arranged, an air inlet (11) is arranged at intervals along the circumferential direction in the middle of the shell (1), two end covers (2) are respectively mounted on the two ends of the shell (1), a rotating shaft mounting hole and an air outlet (21) are arranged on the end cover (2), the rotating shaft mounting hole is located in the middle of the end cover (2), the air outlet (21) is centered on the rotating shaft mounting hole and is evenly arranged along the circumference of the rotating shaft mounting hole, the rotating shaft (3) is fixedly arranged, and the shell (1) and the end cover (2) are fitted in the rotating shaft mounting hole. On the outside of the rotating shaft (3), there are two rotating disks (4), which are installed at intervals on the outer periphery of the rotating shaft (3) and located on both sides of the air inlet (11). The outer periphery of the rotating disk (4) and the inner periphery of the shell (1) are arranged at intervals to form an annular cavity for correspondingly installing the rotating part and the stationary part of the dynamic sealing test piece. The air inlet (11) and the air outlet (21) are connected in the shell (1) only through the annular cavity. The radial displacement adjustment structure is connected to the shell (1) and is used to drive the shell (1) to move along the radial direction of the rotating shaft (3). The temperature sensor, pressure sensor and flow meter are used to monitor the temperature and pressure at the air inlet (11) and the gas flow at the air outlet (21), respectively.

2. The dynamic seal leakage characteristic test device according to claim 1, characterized in that: The radial displacement adjustment structure comprises a first support frame (51) and a first slide (52); the housing (1) is mounted on the first support frame (51) via the first slide (52) and is capable of radially moving relative to the rotating shaft (3) driven by the first slide (52).

3. The dynamic seal leakage characteristic test device according to claim 2, characterized in that: The first support frame (51) is a rectangular frame structure consisting of a first bottom plate, four first side plates arranged at intervals, and a top plate. There are four first slides (52) and they are correspondingly installed on the inner sides of the four first side plates. The shell (1) is located on the inner sides of the four first slides (52) and is fixedly connected to the sliders on the first slides (52).

4. The dynamic seal leakage characteristic test device according to claim 1, characterized in that: The invention also includes a rotation drive structure, wherein the rotation drive structure includes a second support frame (71) and a drive motor, wherein the drive motor is fixedly mounted on the second support frame (71) and the output shaft is connected to the radial displacement adjustment structure, and is used to drive the housing (1) to rotate by driving the radial displacement adjustment structure to rotate, wherein the output shaft of the drive motor is arranged perpendicular to the rotating shaft (3).

5. The dynamic seal leakage characteristic test device according to claim 4, characterized in that: The second supporting frame (71) comprises a second base plate and two second side plates, the two second side plates being vertically connected to the two ends of the second base plate respectively, the driving motor being mounted on one second side plate and having its output shaft connected to one side of the radial displacement regulating structure, and the other second side plate being rotatably connected to the other side of the radial displacement regulating structure.

6. The dynamic seal leakage characteristic test device according to claim 1, characterized in that: The invention also includes an axial displacement adjustment structure, which includes a third support frame (81) and a second slide (82). The housing (1) is mounted on the third support frame (81) via the second slide (82) and can move axially relative to the rotating shaft (3) under the drive of the second slide (82). The outer periphery of the turntable (4) is arranged in a stepped shape along the axial direction of the rotating shaft (3).

7. The dynamic seal leakage characteristic test device according to claim 1, characterized in that: One end of the rotating shaft (3) is connected to the output shaft of the fixed motor, and the other end is mounted on a fixed bearing seat.

8. The dynamic seal leakage characteristic test device according to claim 1, characterized in that: The rotating shaft (3) is arranged horizontally.

9. The dynamic seal leakage characteristic test device according to claim 1, characterized in that: The gas outlet (21) is provided with a temperature measuring point for detecting the gas temperature at the gas outlet.

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