Dynamic test bench for rotor-end face sealing system with static ring axial propulsion device and movable and static ring inclination angle adjustable

Abstract

The invention relates to the technical field of dynamic and static ring sealing experiments, in particular to a dynamic test bed for a rotor-end face sealing system with an axial thrust device of a static ring and adjustable inclination angles of dynamic and static rings, and aims to solve the problem of vibration of an existing rotor-end face sealing system. The dynamic test bed comprises a spring guide sleeve, a water ring shell, a spring, a spring guide rod, the axial thrust device and a thrust bearing; a spring guide sleeve is arranged at the right end of the water ring shell, a spring guide rod is slidably connected into the spring guide sleeve, an annular sliding part is arranged at the right end of the water ring shell, the annular sliding part is slidably connected into the spring guide sleeve, the annular sliding part is slidably connected with the spring guide rod, and the spring is installed between the spring guide sleeve and the spring guide rod and enables the water ring shell to have the trend of moving in the direction away from the spring guide rod. The device is used for simulating relative inclination of the end face sealing movable ring and the end face sealing movable ring caused by vibration of a rotor in actual operation and recording experimental data.

Description

Technical Field

[0001] The invention relates to the technical field of dynamic and static ring sealing experiments, and in particular to a static ring axial propulsion device and a rotor-end face sealing system dynamics test bench with adjustable dynamic and static ring inclination angles. Background Art

[0002] During the operation of rotating machinery, rotor stability is restricted by many factors and is the core of rotor dynamics research, among which sealing and vibration issues are particularly prominent. In the rotor-end face sealing system, the sealing effect and the rotor vibration characteristics affect each other, and the rotor is more prone to instability, which places high demands on the stability of the rotor-end face sealing system.

[0003] In the existing rotor-end face sealing system test, the dynamic sealing ring installed on the rotor will vibrate with the vibration of the rotor, causing the dynamic and static rings in the end face seal to have relative tilting movement, the lubrication state to change, and the sealing excitation force to act on the rotor, causing its unstable vibration to intensify. In severe cases, the rotor may become unstable. Summary of the invention

[0004] The present invention aims to solve the vibration problem of the existing rotor-end face sealing system, to achieve the change of the sealing axial closing force of the sealing static ring and the sealing dynamic ring in the experiment, and to simulate the relative inclination of the end face sealing dynamic and static rings caused by the rotor vibration in actual operation, and further provides a static ring axial propulsion device and a rotor-end face sealing system dynamic test bench with adjustable dynamic and static ring inclination angles to solve the above-mentioned problems.

[0005] The technical solution of the present invention is:

[0006] A static ring axial propulsion device and a rotor-end face sealing system dynamics test bench with adjustable dynamic and static ring inclination angles, comprising a spring guide sleeve, a water ring shell, a spring, a spring guide rod and an axial propulsion device;

[0007] A spring guide rod is slidably connected in the spring guide sleeve, an annular sliding portion is arranged at the right end of the water ring shell, the annular sliding portion is slidably connected in the spring guide sleeve, the annular sliding portion is slidably connected to the spring guide rod, the spring is installed between the spring guide sleeve and the spring guide rod, the spring makes the water ring shell have a tendency to move away from the spring guide rod, an axial pushing device is installed at the right end of the spring guide sleeve, the axial pushing device is used to push the spring guide rod to move in a direction away from the right end face of the spring guide sleeve, and a fluid flow channel is opened in the water ring shell;

[0008] Furthermore, a sealing static ring is fixed to the left end of the water ring housing, and the center of the sealing static ring is connected to the fluid flow channel.

[0009] Furthermore, the sealing static ring comprises an outer sealing static ring and an inner sealing static ring, and a gap between the outer sealing static ring and the inner sealing static ring is communicated with the fluid flow channel.

[0010] Furthermore, a pressure gauge for measuring liquid pressure is provided in the fluid flow channel.

[0011] A dynamic test bench for a rotor-end face sealing system with adjustable dynamic and static ring inclination angles, comprising a fixed bracket, a static ring axial propulsion device, a bearing box, a bearing, a rotor, a sealing dynamic ring and a coupling;

[0012] The bearing box is installed on a fixed bracket at the left end, the bearing box is rotatably connected with a rotor through a bearing, a lubricating oil nozzle is installed in the bearing box, a coupling is fixed at the left end of the rotor, and a sealing dynamic ring is fixed at the right end of the rotor;

[0013] The stationary ring axial propulsion device is installed at the right end of the bearing box through two fixed brackets. The inclination angle of the stationary ring axial propulsion device is adjusted by changing the relative height of the two fixed brackets. The sealing stationary ring in the stationary ring axial propulsion device contacts the sealing dynamic ring at the right end of the rotor.

[0014] Further, the fixed bracket includes a bottom plate, a rib plate, a lower slider plate, a left slider, a right slider, an adjustment screw, an upper slider, a fixing member and a support seat;

[0015] The rib plate is fixed to the upper end of the bottom plate, and a lower slider plate is fixed to the upper end of the rib plate. A left slider and a right slider are slidably connected to the lower slider plate. The tops of the left slider and the right slider are both wedge surface I. Two wedge surfaces II are symmetrically arranged at the lower end of the upper slider. The two wedge surfaces II at the lower end of the upper slider are respectively in contact with the wedge surfaces I at the tops of the left slider and the right slider. The adjusting screws are respectively threadedly connected to the left slider and the right slider. The adjusting screws are used to adjust the spacing between the left slider and the right slider to push the upper slider to move up and down. The fixing piece is used to penetrate and fix the lower slider plate and the upper slider. A connecting portion is arranged at the upper end of the upper slider.

[0016] Furthermore, an axial eddy current displacement sensor is provided at the axial position of the rotor, a rotor cantilever is provided at the connection between the rotor and the sealing dynamic ring, and an eddy current displacement sensor perpendicular to the rotor cantilever and an eddy current displacement sensor parallel to the rotor cantilever are installed on the rotor cantilever.

[0017] Furthermore, the bearings are a pair of angular contact bearings.

[0018] Furthermore, a lubricating oil return pipe is also provided in the bearing box.

[0019] Furthermore, pads are provided between the three fixing brackets and the ground, and are fixedly connected to the ground by bolts.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. A stationary ring axial propulsion device is provided with a water ring shell which is the same as the fixed sealing stationary ring. The fluid flow channel in the water ring shell is connected with the sealing stationary ring to simulate the contact environment between the sealing stationary ring and the sealing dynamic ring and the sealed liquid during operation. A pressure gauge is provided in the fluid flow channel to measure the real-time changes of the sealing effect.

[0022] 2. This axial propulsion device pushes the static seal ring and the dynamic seal ring to be close together through the spring set inside, so as to simulate the pressure environment of the static seal ring and the dynamic seal ring when they are working. By operating the axial propulsion device, the compression amount of the spring can be adjusted, thereby changing the sealing axial closing force of the static seal ring and the dynamic seal ring, and then obtaining a variety of experimental data.

[0023] 3. A dynamic test bench for a rotor-end face sealing system with adjustable inclination angles of dynamic and static rings. The static ring axial propulsion device is fixed on two fixed brackets with adjustable heights. By adjusting the relative heights of the two fixed brackets, the sealing static ring in the static ring axial propulsion device and the sealing dynamic ring on the rotor are tilted in the axial direction, or the sealing static ring and the sealing dynamic ring are misaligned, which is used to study the vibration characteristics of the rotor-end face sealing system when the dynamic and static rings are relatively tilted.

[0024] 4. An axial eddy current displacement sensor is provided at the axial position of the rotor to measure the axial vibration of the rotor system; a rotor cantilever is provided at the connection between the rotor and the sealing dynamic ring, and an eddy current displacement sensor perpendicular to the rotor cantilever and an eddy current displacement sensor parallel to the rotor cantilever are installed on the rotor cantilever to measure the circumferential vibration of the rotor system from multiple angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a rotor-end face sealing system dynamics test bench with adjustable dynamic and static ring inclination angles in the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the gear box in the invention;

[0027] Figure 3 It is a schematic diagram of the structure of the stationary ring axial propulsion device in the present invention;

[0028] Figure 4 The structure of the fixed bracket in the present invention is shown in FIG. Figure Ⅰ ;

[0029] Figure 5 The structure of the fixed bracket in the present invention is shown in FIG. Figure II .

[0030] In the figure: 1. fixed bracket; 101. bottom plate; 102. rib plate; 103. lower slider slide plate; 104. left slider; 105. right slider; 106. adjustment screw; 107. upper slider; 108. fixing piece; 109. connecting part; 2. bearing box; 201. bearing; 202. rotor; 203. lubricating oil nozzle; 204. sealing dynamic ring; 205. lubricating oil return pipe; 301. spring guide sleeve; 302. water ring shell; 307. annular sliding part; 303. spring; 304. fluid flow channel; 305. spring guide rod; 306. axial pushing device; 308. sealing static ring; 3. static ring axial pushing device; 4. coupling. DETAILED DESCRIPTION

[0031] Specific implementation method 1: See Figure 3 A schematic diagram of the structure of the stationary ring axial propulsion device, introducing the working principle of the stationary ring axial propulsion device for adjusting the sealing axial closing force of the sealing stationary ring and the sealing dynamic ring, a stationary ring axial propulsion device, this embodiment includes a spring guide sleeve 301, a water ring shell 302, a spring 303, a spring guide rod 305 and an axial propulsion device 306;

[0032] A spring guide rod 305 is slidably connected in the spring guide sleeve 301, an annular sliding portion 307 is provided at the right end of the water ring shell 302, the annular sliding portion 307 is slidably connected in the spring guide sleeve 301, the annular sliding portion 307 is slidably connected to the spring guide rod 305, the spring 303 is installed between the spring guide sleeve 301 and the spring guide rod 305, the spring 303 makes the water ring shell 302 have a tendency to move away from the spring guide rod 305, an axial pushing device 306 is installed at the right end of the spring guide sleeve 301, the axial pushing device 306 is used to push the spring guide rod 305 to move in a direction away from the right end face of the spring guide sleeve 301, and a fluid flow channel 304 is opened in the water ring shell 302.

[0033] Furthermore, the spring guide sleeve 301 is a hollow cylindrical sleeve with an opening at the left end, and the spring guide rod 305 plays a supporting role for the spring 303. The right end of the spring 303 bears against the boss provided at the right end of the spring guide rod 305, and the left end of the spring 303 bears against the annular sliding portion 307 at the right end of the water ring shell 302. The water ring shell 302 is slidably connected to the spring guide sleeve 301 through the annular sliding portion 307, and the water ring shell 302 is slidably connected to the spring guide rod 305 through the annular sliding portion 307, so that the spring guide sleeve 301, the water ring shell 302 and the spring guide rod 305 can slide coaxially relative to each other. The axial pushing device 306 is a screw pushing device, and its movable end is rotatably connected to the spring guide rod 305 through a thrust bearing.

[0034] Furthermore, the spring 303 is used to push the sealing static ring 308 to be in close contact with the sealing dynamic ring 204, so as to simulate the pressure environment of the sealing static ring 308 and the sealing dynamic ring 204 when working. By operating the axial pushing device 306, the compression amount of the spring 303 is adjusted, thereby changing the sealing axial closing force of the sealing static ring 308 and the sealing dynamic ring 204, and then obtaining various experimental data.

[0035] Specific implementation method 2: See Figure 3 As shown, a sealing static ring 308 is fixed to the left end of the water ring housing 302 of this embodiment, and the center of the sealing static ring 308 is connected to the fluid flow channel 304.

[0036] Furthermore, the sealing static ring 308 is fixed to the left end of the water ring housing 302 by bolts to ensure the seal between the water ring housing 302, and the outer diameter of the fluid flow channel 304 is smaller than the inner diameter of the sealing static ring 308, so that the liquid pressure in the fluid flow channel 304 can be directly added between the sealing static ring 308 and the sealing dynamic ring 204.

[0037] Specific implementation method three: see Figure 3 As shown, the sealing static ring 308 of this embodiment includes an outer sealing static ring and an inner sealing static ring, and the gap between the outer sealing static ring and the inner sealing static ring is connected to the fluid flow channel 304.

[0038] Furthermore, the fluid channel 304 is annular, and the inner diameter of the fluid channel 304 is larger than the outer diameter of the inner sealing static ring, and the outer diameter of the fluid channel 304 is smaller than the inner diameter of the outer sealing static ring, so that the liquid in the fluid channel 304 can be injected into the gap between the outer sealing static ring and the inner sealing static ring.

[0039] Specific implementation method four: see Figure 3 As shown, a pressure gauge for measuring liquid pressure is provided in the fluid flow channel 304 of this embodiment.

[0040] Furthermore, in the experiment, high-pressure liquid was introduced into the fluid flow channel 304, and the experimental results were obtained by observing the amount of liquid overflowing from the sealing dynamic ring 204 and the sealing static ring 308 and the changing value of the pressure gauge.

[0041] Specific implementation method five: see Figure 1-5 , introduces the adjustment principle of the inclination angle on the axis of the sealing static ring and the sealing dynamic ring, a rotor-end face sealing system dynamic test bench with adjustable inclination angle of the dynamic and static rings using a static ring axial propulsion device according to one of claims 1-4, this embodiment includes a fixed bracket 1, a static ring axial propulsion device 3, a bearing box 2, a bearing 201, a rotor 202, a sealing dynamic ring 204 and a coupling 4;

[0042] The bearing box 2 is mounted on the fixed bracket 1 at the left end, the bearing box 2 is rotatably connected with the rotor 202 through the bearing 201, the bearing box 2 is installed with a lubricating oil nozzle 203, the left end of the rotor 202 is fixed with a coupling 4, and the right end of the rotor 202 is fixed with a sealing dynamic ring 204;

[0043] The stationary ring axial propulsion device 3 is installed at the right end of the bearing box 2 through two fixed brackets 1. The inclination angle of the stationary ring axial propulsion device 3 is adjusted by changing the relative height of the two fixed brackets 1. The sealing stationary ring 308 in the stationary ring axial propulsion device 3 contacts the sealing dynamic ring 204 at the right end of the rotor 202.

[0044] Furthermore, the two bearings 201 are fixed in the bearing box 2 by two sets of bearing glands and hexagonal screws, and the spray port of the lubricating oil nozzle 203 is facing the bearing, so that the lubricating oil can be sprayed directly on the bearing to lubricate and cool the bearing. The stationary ring axial propulsion device 3 is installed at the right end of the bearing box 2 through two fixed brackets 1. After adjusting the relative height of the two fixed brackets 1, the sealing stationary ring 308 in the stationary ring axial propulsion device 3 and the sealing dynamic ring 204 on the rotor 202 can be tilted in the axial direction; when the height of the two fixed brackets 1 is adjusted synchronously, the sealing stationary ring and the sealing dynamic ring can be misaligned, which is used to study the vibration characteristics of the rotor-end face sealing system when the dynamic and static rings are relatively tilted.

[0045] Specific implementation method six: see Figure 4-5 As shown, the fixing bracket 1 of this embodiment includes a bottom plate 101, a rib plate 102, a lower slider plate 103, a left slider 104, a right slider 105, an adjustment screw 106, an upper slider 107, a fixing member 108 and a connecting portion 109;

[0046] The rib plate 102 is fixed to the upper end of the bottom plate 101, and a lower slider plate 103 is fixed to the upper end of the rib plate 102. A left slider 104 and a right slider 105 are slidably connected to the lower slider plate 103. The tops of the left slider 104 and the right slider 105 are both wedge surface I. Two wedge surfaces II are symmetrically arranged at the lower end of the upper slider 107. The two wedge surfaces II at the lower end of the upper slider 107 are in contact with the wedge surfaces I at the tops of the left slider 104 and the right slider 105 respectively. The adjusting screws 106 are threadedly connected to the left slider 104 and the right slider 105 respectively. The adjusting screws 106 are used to adjust the distance between the left slider 104 and the right slider 105 to push the upper slider 107 to move up and down. The fixing member 108 is used to penetrate and fix the lower slider plate 103 and the upper slider 107. A connecting portion 109 is arranged at the upper end of the upper slider 107.

[0047] Furthermore, when adjusting the height of the fixed bracket 1, first remove the fixing part 108, then rotate the adjustment screw 106, adjust the distance between the left slider 104 and the right slider 105, and then drive the upper slider 107 to move up and down to a suitable height, and finally install the fixing part 108 to complete the height adjustment of the fixed bracket 1.

[0048] Specific implementation method seven: See Figure 2 As shown, an axial eddy current displacement sensor is provided at the axial position of the rotor 202 of this embodiment, and a rotor cantilever is provided at the connection between the rotor 202 and the sealing dynamic ring 204, and an eddy current displacement sensor perpendicular to the rotor cantilever and an eddy current displacement sensor parallel to the rotor cantilever are installed on the rotor cantilever.

[0049] Furthermore, the axial eddy current displacement sensor arranged at the axial position of the rotor 202 is used to measure the axial vibration of the rotor system; the eddy current displacement sensor perpendicular to the rotor cantilever and the eddy current displacement sensor parallel to the rotor cantilever installed on the rotor cantilever are used to measure the circumferential vibration of the rotor system from multiple angles.

[0050] Specific implementation method eight: See Figure 2 As shown, the bearing 201 of this embodiment is a pair of angular contact bearings.

[0051] Specific implementation method nine: See Figure 2 As shown, a lubricating oil return pipe 205 is also provided in the bearing box 2 of this embodiment.

[0052] Furthermore, the lubricating oil return pipe 205 and the lubricating oil nozzle 203 form a lubricating oil circulation loop. After being filtered and cooled, the lubricating oil is sprayed on the bearing 201 again to lubricate and cool the bearing 201 .

[0053] Specific implementation method ten: See Figure 4 As shown, pads are provided between the three fixing brackets 1 of this embodiment and the ground, and are fixedly connected to the ground by bolts.

[0054] Furthermore, the pad is used to absorb the deformation of the device when the stationary ring axial propulsion device 3 generates an inclination angle.

[0055] In the experiment, the seal dynamic ring 204 and the seal static ring 308 are installed, the fixing bracket 1 is adjusted so that the seal dynamic ring 204 and the seal static ring 308 form the experimental angle, the axial pushing device 306 is rotated to adjust the seal axial closing force between the seal dynamic ring 204 and the seal static ring 308 to the preset value of the experiment, and the high-pressure liquid is connected to the fluid flow channel 304 to drive the rotor 202 to rotate. The experimental results are finally obtained by observing the amount of liquid overflowed from the seal dynamic ring 204 and the seal static ring 308, and recording the change values ​​of multiple eddy current displacement sensors and pressure gauges.

Claims

1. A stationary ring axial propulsion device, characterized in that: It comprises a spring guide sleeve (301), a water ring shell (302), a spring (303), a spring guide rod (305) and an axial pushing device (306); A spring guide rod (305) is slidably connected in the spring guide sleeve (301), an annular sliding portion (307) is provided at the right end of the water ring shell (302), the annular sliding portion (307) is slidably connected in the spring guide sleeve (301), the annular sliding portion (307) is slidably connected to the spring guide rod (305), a spring (303) is installed between the spring guide sleeve (301) and the spring guide rod (305), the spring (303) makes the water ring shell (302) have a tendency to move in a direction away from the spring guide rod (305), an axial pushing device (306) is installed at the right end of the spring guide sleeve (301), the axial pushing device (306) is used to push the spring guide rod (305) to move in a direction away from the right end surface of the spring guide sleeve (301), and a fluid flow channel (304) is opened in the water ring shell (302).

2. The stationary ring axial propulsion device according to claim 1 is characterized in that: A sealing static ring (308) is fixed to the left end of the water ring housing (302), and the center of the sealing static ring (308) is connected to the fluid flow channel (304).

3. The stationary ring axial propulsion device according to claim 2 is characterized in that: The sealing static ring (308) comprises an outer sealing static ring and an inner sealing static ring, and a gap between the outer sealing static ring and the inner sealing static ring is connected to the fluid flow channel (304).

4. The stationary ring axial propulsion device according to claim 3 is characterized in that: The fluid flow channel (304) is provided with a pressure gauge for measuring liquid pressure.

5. A rotor-end face seal system dynamics test bench with adjustable inclination angles of dynamic and static rings using the static ring axial propulsion device according to any one of claims 1 to 4, characterized in that: It comprises a fixed support (1), a stationary ring axial propulsion device (3), a bearing box (2), a bearing (201), a rotor (202), a sealing dynamic ring (204) and a coupling (4); The bearing box (2) is mounted on a fixed bracket (1) at the left end, a rotor (202) is rotatably connected to the bearing box (2) via a bearing (201), a lubricating oil nozzle (203) is installed in the bearing box (2), a coupling (4) is fixed to the left end of the rotor (202), and a sealing dynamic ring (204) is fixed to the right end of the rotor (202); The stationary ring axial propulsion device (3) is installed at the right end of the bearing box (2) through two fixed brackets (1). The inclination angle of the stationary ring axial propulsion device (3) is adjusted by changing the relative height of the two fixed brackets (1). The sealing stationary ring (308) in the stationary ring axial propulsion device (3) contacts the sealing dynamic ring (204) at the right end of the rotor (202).

6. The rotor-end face seal system dynamics test bench with adjustable dynamic and static ring inclination angles according to claim 5 is characterized by: The fixed bracket (1) comprises a bottom plate (101), a rib plate (102), a lower slider plate (103), a left slider (104), a right slider (105), an adjustment screw (106), an upper slider (107), a fixing member (108) and a connecting portion (109); The rib plate (102) is fixed to the upper end of the bottom plate (101), a lower slider plate (103) is fixed to the upper end of the rib plate (102), a left slider (104) and a right slider (105) are slidably connected to the lower slider plate (103), the tops of the left slider (104) and the right slider (105) are both wedge surfaces I, the lower end of the upper slider (107) is symmetrically provided with two wedge surfaces II, the two wedge surfaces II at the lower end of the upper slider (107) are respectively connected to the left slider (104) and the right slider (105). The wedge surface I at the top of the slider (105) is in contact, and the adjusting screw (106) is threadedly connected to the left slider (104) and the right slider (105) respectively. The adjusting screw (106) is used to adjust the distance between the left slider (104) and the right slider (105) to push the upper slider (107) to move up and down. The fixing member (108) is used to penetrate and fix the lower slider plate (103) and the upper slider (107). The upper end of the upper slider (107) is provided with a connecting portion (109).

7. The rotor-end face seal system dynamics test bench with adjustable dynamic and static ring inclination angles according to claim 6 is characterized by: An axial eddy current displacement sensor is provided at the axial position of the rotor (202), a rotor cantilever is provided at the connection between the rotor (202) and the sealing dynamic ring (204), and an eddy current displacement sensor perpendicular to the rotor cantilever and an eddy current displacement sensor parallel to the rotor cantilever are installed on the rotor cantilever.

8. The rotor-end face seal system dynamics test bench with adjustable dynamic and static ring inclination angles according to claim 7 is characterized by: The bearings (201) are a pair of angular contact bearings.

9. The rotor-end face seal system dynamics test bench with adjustable dynamic and static ring inclination angles according to claim 8 is characterized by: The bearing box (2) is also provided with a lubricating oil return pipe (205).

10. The rotor-end face seal system dynamics test bench with adjustable dynamic and static ring inclination angles according to claim 9 is characterized in that: Pads are provided between the three fixing brackets (1) and the ground, and are fixedly connected to the ground via bolts.

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