Dynamic seal leakage characteristic test device

Abstract

This utility model discloses a dynamic seal leakage characteristic testing device, comprising: a housing, end caps, a rotating shaft, turntables, a radial displacement adjustment structure, a temperature sensor, a pressure sensor, and a flow meter. The end caps are fitted onto both ends of the housing and then onto the rotating shaft. An air inlet is located in the middle of the housing, and an air outlet is located on the end caps. Two turntables are spaced apart and installed on the outer circumference of the rotating shaft, located on either side of the air inlet. The outer circumference of the turntables and the inner circumference of the housing form an annular cavity for mounting the dynamic seal test piece. The radial displacement adjustment structure is connected to the housing and is used to drive the housing to move radially along the rotating shaft. The temperature sensor, pressure sensor, and flow meter are used to monitor the temperature and pressure at the air inlet and the gas flow rate at the air outlet, respectively. This dynamic seal leakage characteristic testing device can measure the leakage of brush seals under different pressure differentials, temperatures, and rotational speeds, and can also simulate radial interference conditions under large load impacts.

Description

Technical Field

[0001] This utility model relates to the field of dynamic sealing testing technology, and in particular provides a dynamic sealing leakage characteristic testing device. Background Technology

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

[0003] Studying the leakage characteristics of dynamic seals under actual working conditions is of great engineering significance. However, existing dynamic seal leakage characteristic testing devices usually test the leakage characteristics of seals under steady conditions, and cannot simulate the leakage characteristics under radial interference under large impact loads.

[0004] Therefore, providing a test device for dynamic seal leakage characteristics that can simulate radial interference under large impact loads has become an urgent problem to be solved. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a dynamic seal leakage characteristic testing device to at least solve the problems existing in the prior art.

[0006] The technical solution provided by this utility model is: a dynamic seal leakage characteristic testing device, comprising: a shell, end caps, a rotating shaft, a turntable, a radial displacement adjustment structure, a temperature sensor, a pressure sensor, and a flow meter. The shell is cylindrical and fixedly installed. Air inlets are spaced circumferentially at intervals along the middle of the shell. Two end caps are respectively fitted and installed at both ends of the shell. Each end cap has a rotating shaft mounting hole and an air outlet. The rotating shaft mounting hole is located in the middle of the end cap, and the air outlets are evenly distributed circumferentially around the rotating shaft mounting hole. The rotating shaft is fixedly installed. The shell and end caps are connected... The rotating shaft is fitted with a mounting hole through which two rotating disks are installed on the outer side of the rotating shaft. The two rotating disks are installed at intervals on the outer periphery of the rotating shaft and on both sides of the air inlet. The outer periphery of the rotating disks and the inner periphery of the housing are spaced apart to form annular cavities for corresponding installation of rotating and stationary parts of the dynamic sealing test piece. The air inlet and the air outlet are connected within the housing only through the annular cavity. The radial displacement adjustment structure is connected to the housing and is used to drive the housing to move radially along the rotating shaft. The temperature sensor, pressure sensor and flow meter are used to monitor the temperature and pressure at the air inlet and the gas flow rate at the air outlet, respectively.

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

[0008] Further preferably, the first support frame is a rectangular frame structure consisting of a first base plate, four spaced-apart first side plates and a top plate, and four first slides are installed on the inner sides of the four first side plates respectively. The housing is located on the inner side 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 further includes a rotary drive structure, wherein the rotary drive structure includes a second support frame and a drive motor, the drive motor is fixedly installed on the second support frame and its output shaft is connected to the radial displacement adjustment structure, and is used to drive the housing 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 being vertically connected to both ends of the second base plate, the drive motor being mounted on one of the second side plates and its output shaft being connected to one side of the radial displacement adjustment structure, and the other second side plate being 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 housing is mounted on the third support frame via 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 set in a stepped shape along the axial direction of the rotating shaft.

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

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

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

[0015] The dynamic seal leakage characteristic test device provided by this utility model has a reasonable structure. It can measure the leakage of dynamic seal test pieces under different pressure differences, different temperatures, and different rotation speeds. It can also simulate radial interference conditions under large impact loads to obtain leakage data under corresponding conditions. Among them, adjusting the rotation speed of the shaft can simulate different rotor speeds. Pressure and temperature sensors can monitor the pressure and temperature of the air inlet in real time. The flow meter can detect the gas flow rate at the outlet. The radial displacement adjustment structure can adjust the radial offset between the housing and the shaft to obtain the leakage under corresponding conditions. Attached Figure Description

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments: Figure 1 A schematic diagram of the dynamic seal leakage characteristic testing device provided by this utility model; Figure 2 A cross-sectional view of the dynamic seal leakage characteristic testing device provided by this utility model. Detailed Implementation

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

[0018] To simulate the radial interference condition of an engine under heavy load impact, leakage data was obtained under the condition of radial interference between the shaft and the seal, such as... Figure 1 , Figure 2As shown, this utility model provides a dynamic seal leakage characteristic testing device, including: a housing 1, end caps 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). The housing 1 is cylindrical and fixedly installed. Air inlets 11 are spaced circumferentially at intervals along the middle of the housing 1. Two end caps 2 are respectively fitted and installed at both ends of the housing 1. Each end cap 2 has a rotating shaft mounting hole and an air outlet 21. The rotating shaft mounting hole is located in the middle of the end cap 2, and the air outlets 21 are evenly arranged circumferentially around the rotating shaft mounting hole. The rotating shaft 3 is fixedly installed. The housing 1 and the end caps 2 are connected through the rotating shaft mounting hole. The housing is assembled 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 on both sides of the air inlet 11. The outer periphery of the rotating disks 4 and the inner periphery of the housing 1 are spaced apart to form annular cavities for corresponding installation of rotating and stationary parts of the dynamic sealing test piece. The air inlet 11 and the air outlet 21 are connected in the housing 1 only through the annular cavity. The radial displacement adjustment structure is connected to the housing 1 and is used to drive the housing 1 to move radially along 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 rate at the air outlet 21, respectively. The flow meter can be installed only on one side of the air outlet or on both sides of the air outlet.

[0019] This dynamic seal leakage characteristic testing device has a reasonable structure and can measure the leakage of dynamic seal test pieces under different pressure differences, temperatures, and rotational speeds. It can also simulate radial interference conditions under large impact loads to obtain leakage data under corresponding conditions. Among them, adjusting the rotational speed of the shaft can simulate different rotor speeds, pressure and temperature sensors can monitor the pressure and temperature of the air inlet in real time, the flow meter can detect the gas flow rate at the air inlet, and the radial displacement adjustment structure can adjust the radial offset between the housing and the shaft to obtain the seal leakage under corresponding conditions.

[0020] As an improvement to the technical solution, such as 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 under the drive of the first slide 52.

[0021] As an improvement to the technical solution, such as Figure 1 , Figure 2As shown, the first support frame 51 is a rectangular frame structure composed of a first base plate, four spaced first side plates, and a top plate. There are four first slides 52, which are installed on the inner sides of the four first side plates. The housing 1 is located inside 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 in detail here. Preferably, a support block with a flat bottom surface and a top surface that fits with the outer periphery of the housing 1 is fixedly installed at the bottom of the housing 1. 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 to the technical solution, such as Figure 1 , Figure 2 As shown, the dynamic seal leakage characteristic test device also includes a rotary drive structure, wherein the rotary drive structure includes a second support frame 71 and a drive motor (not shown in the figure). The drive motor is fixedly installed on the second support frame 71 and its output shaft is connected to the radial displacement adjustment structure. It is used to drive the housing 1 to rotate by driving the radial displacement adjustment structure to rotate. The output shaft of the drive motor is set 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 to the technical solution, such as 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 mounted on one of the second side plates and its output shaft is connected to one side of the radial displacement adjustment structure. 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 rotary drive structure are fixedly provided on both sides of the radial displacement adjustment structure. The drive motor can drive the second side plate connected to it to rotate, thereby driving the radial displacement adjustment structure to rotate.

[0024] As an improvement to the technical solution, such as Figure 1 , Figure 2 As shown, the dynamic seal leakage characteristic test device also includes an axial displacement adjustment structure. This axial displacement adjustment structure 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 stepped along the axial direction of the rotating shaft 3. In this structure, the axial displacement adjustment structure drives the housing 1 to move axially along the rotating shaft 3, which adjusts the sealing gap of the dynamic seal test piece installed in the annular cavity, avoiding the problem of frequently replacing the rotating shaft to adjust the sealing gap. Preferably, as shown... Figure 1 , Figure 2 As shown, the rotary drive structure is mounted across the two second slides and is used to drive the housing to move axially along the axis of rotation under the drive of the axial displacement adjustment structure.

[0025] As an improvement to the technical solution, such as 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 mounted on a fixed bearing seat.

[0026] As an improvement to the technical solution, such as Figure 1 , Figure 2 As shown, the rotating shaft 3 is horizontally positioned.

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

[0028] The specific embodiments of this utility model are written in a progressive manner, emphasizing the differences between each implementation scheme, and the similar parts can be referred 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. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A dynamic seal leakage characteristic test apparatus characterized by comprising: include: The system comprises a housing (1), end caps (2), a rotating shaft (3), a turntable (4), a radial displacement adjustment structure, a temperature sensor, a pressure sensor, and a flow meter. The housing (1) is cylindrical and fixedly mounted. An air inlet (11) is spaced circumferentially at the center of the housing (1). Two end caps (2) are respectively fitted onto both ends of the housing (1). Each end cap (2) has a rotating shaft mounting hole and an air outlet (21). The rotating shaft mounting hole is located in the center of the end cap (2). The air outlet (21) is evenly spaced circumferentially around the rotating shaft mounting hole. The rotating shaft (3) is fixedly mounted. The housing (1) and end caps (2) are fitted together through the rotating shaft mounting hole. On the outside of the rotating shaft (3), there are two turntables (4). The two turntables (4) are installed at intervals on the outer periphery of the rotating shaft (3) and on both sides of the air inlet (11). The outer periphery of the turntable (4) and the inner periphery of the housing (1) are spaced apart to form an annular cavity for corresponding installation of the rotating and stationary parts of the dynamic sealing test piece. The air inlet (11) and the air outlet (21) are connected in the housing (1) only through the annular cavity. The radial displacement adjustment structure is connected to the housing (1) and is used to drive the housing (1) to move radially along 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 device of claim 1, wherein: 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) under the drive of the first slide (52).

3. The apparatus of claim 2, wherein: The first support frame (51) is a rectangular frame structure consisting of a first base plate, four first side plates spaced apart, and a top plate. There are four first slides (52) and they are installed on the inner side of the four first side plates. The housing (1) is located on the inner side of the four first slides (52) and is fixedly connected to the sliders on the first slides (52).

4. The apparatus of claim 1, wherein: It also includes a rotary drive structure, wherein the rotary drive structure includes a second support frame (71) and a drive motor, the drive motor is fixedly installed on the second support frame (71) and its 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 perpendicular to the rotating shaft (3).

5. The apparatus of claim 4, wherein: 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 mounted on one of the second side plates and its output shaft is connected to one side of the radial displacement adjustment structure. The other second side plate is rotatably connected to the other side of the radial displacement adjustment structure.

6. The dynamic seal leakage characteristic testing device according to claim 1, characterized in that: It 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 set in a stepped shape along the axial direction of the rotating shaft (3).

7. The dynamic seal leakage characteristic testing 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 installed on the fixed bearing seat.

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

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

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