A test device for radial carbon ring seals

Abstract

The application discloses a kind of test devices for radial carbon ring seal, belong to carbon ring seal technical field, this test device for radial carbon ring seal, including helium mass spectrograph leak detector and sealed cavity, the helium mass spectrograph leak detector top is equipped with leak detection mouth, the sealed cavity is divided into sealed tank and sealing cover, the sealing cover is buckled on sealed tank, the sealed tank bottom is equipped with connecting port, the connecting port is communicated with leak detection mouth, the connecting port and leak detection mouth outside are provided with clamp;The servo motor is arranged on the upper side of the sealing cover, and the adjusting indicating mechanism for adjusting the position of the servo motor is arranged on the side wall of the servo motor.The test mechanism for clamping and rotating radial carbon ring seal is arranged in the sealed tank, and the adjusting indicating mechanism for facilitating the staff to master the opening degree of the test mechanism, so that the staff can better test the sealing performance of radial carbon ring seal of different sizes in the simulated working scene.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of carbon ring seals, and particularly relates to a test device for a radial carbon ring seal. BACKGROUND

[0002] The radial carbon ring seal is a non-contact and labyrinth type gas sealing device, which is mainly composed of a plurality of static carbon graphite rings stacked in the radial direction, and relies on a small gap and throttling effect to realize sealing of high-pressure fluid. The radial carbon ring seal is mainly applied to shaft end sealing of rotating equipment, and mainly comprises a carbon graphite ring, a sealing cavity, a spring and a blocking gas system. The carbon ring is a core component, which is usually composed of one or more annular rings made of special graphite material. The radial carbon ring seal has self-lubricating property, high temperature resistance and good chemical stability, and can realize effective sealing and low wear rate in slight contact with the metal shaft.

[0003] In the Chinese patent with the publication number CN220356606U, a carbon ring seal leakage detection device is mentioned. The utility model forms the sealing cavity of the carbon ring seal tool group by the nest shell sealing piece and the cover plate sealing piece, and separates the sealing cavity into a first chamber and a second chamber by a floating ring. The gas flow difference in the two chambers is monitored by a monitor, so as to detect the sealing effect of the carbon ring seal, thereby ensuring the detection of the sealing quality of the equipment before leaving the factory, making the leakage of the equipment controllable, and providing protection for the localization of core unit spare parts.

[0004] For the radial carbon ring seal, the most important capability is the sealing performance. When testing the sealing performance of the radial carbon ring seal with small size, a helium mass spectrum leak detector is usually used. In use, the staff will place the carbon ring seal in the prepared sealing cavity, then connect the sealing cavity with the leak detection port of the helium mass spectrum leak detector, and finally detect the sealing performance of the carbon ring seal in the sealing cavity. However, the carbon ring seal will be subjected to friction from the metal shaft and external pressure in actual work. Therefore, in order to be closer to the actual working condition of the carbon ring seal, test accessories for simulating the actual working environment of carbon ring seals of different sizes need to be additionally arranged in the sealing cavity. SUMMARY

[0005] The technical problem to be solved by the application is to overcome the shortcomings of the prior art and provide a test device for a radial carbon ring seal.

[0006] The technical scheme adopted to solve the above technical problem is:

[0007] A kind of test device for radial carbon ring seal, including helium mass spectrometer leak detector and sealed cavity, the helium mass spectrometer leak detector top is provided with leak detection mouth, the sealed cavity is divided into sealed tank and sealing cover, the sealing cover is buckled on sealed tank, the sealed tank bottom is provided with connecting port, the connecting port is communicated with leak detection mouth, the connecting port and leak detection mouth outside are provided with clamp;

[0008] The servo motor output is fixedly provided with driving gear, the driving gear other side wall is fixedly provided with top telescopic rod, the top telescopic rod is fixedly provided in the top of sealing cover, the top of sealing cover is also provided with bottom gear and top gear, the bottom gear and top gear are coaxially arranged, the top gear side wall is fixedly provided with scale line, the top gear is engaged with driving gear, the servo motor side wall is provided with adjusting indication mechanism for adjusting the position of servo motor;

[0009] The bottom gear top is fixedly provided with fixed ring, the bottom gear bottom is fixedly provided with sleeve, the sleeve is sealed through sealing cover, the top gear bottom is fixedly provided with inner rod, the inner rod passes through the inside of sleeve, the inner rod and sleeve extend into the inside of sealed tank and are provided with test mechanism for testing radial carbon ring seal.

[0010] Through the above technical scheme, the test mechanism for clamping and rotating radial carbon ring seal is arranged in the inside of sealed tank, and the adjusting indication mechanism for facilitating the staff to master the opening degree of test mechanism is arranged, so that the staff can better test the sealing performance of radial carbon ring seal of different sizes in the case of simulating working scene, and the clamp is arranged to better seal and connect the connecting port and leak detection mouth together, to improve the detection accuracy of radial carbon ring seal.

[0011] Further, the adjusting indication mechanism includes top ring, bottom ring, connecting rod, center plate, plug rod, side plate, finger plate, indication arrow, fixed clamping tooth and two side springs, the top ring is fixedly arranged at the tail of servo motor, the bottom ring is rotatably arranged on the side wall of servo motor output, the connecting rod is fixedly arranged between top ring and bottom ring, the connecting rod is U-shaped with opening facing top gear, the connecting rod both ends side wall is provided with through hole, the center plate passes through two through holes, the center plate side wall is provided with two limiting holes, the connecting rod side wall is provided with through hole, the plug rod passes through through hole and limiting hole in sequence, the side plate is fixedly arranged on the side wall of plug rod, two side springs are respectively fixedly arranged between side plate and connecting rod, the finger plate is fixedly arranged on the side wall of plug rod, the finger plate abuts against the side wall of connecting rod, the indication arrow is fixedly arranged at the bottom of connecting rod, the indication arrow points to scale line, the fixed clamping tooth is fixed at the bottom of indication arrow, and the fixed clamping tooth is engaged with bottom gear.

[0012] Through the technical scheme, the staff can drive the inserting rod to leave the limiting hole by moving the finger plate, and then adjust the position of the connecting rod and the servo motor. When the inserting rod is inserted into the limiting hole above, the indicating arrow is at the same height with the scale line, and the indicating arrow is opposite to the zero scale position of the scale line, so that the staff can master the rotation angle of the top gear. In addition, the scale line is arranged in a ring shape, so that the staff can determine the rotation angle of the top gear according to the inner diameter size of the radial carbon ring seal, and then perform the operation outside the field of view. When the sealing cover is buckled, the staff can still fix the radial carbon ring seal in the sealing tank.

[0013] Further, the top of the fixed tooth is rotationally connected with a rotating rod, the other end of the rotating rod is rotationally connected with the bottom of the indicating arrow, the rotating rod is externally sleeved with a top torsional spring, the top of the fixed tooth is fixedly provided with an arc-shaped bottom plate, the bottom of the indicating arrow is fixedly provided with an arc-shaped baffle, and the arc-shaped bottom plate abuts against the sidewall of the arc-shaped baffle.

[0014] Through the technical scheme, the arc-shaped baffle and the bottom plate are arranged together, so that the fixed tooth can only rotate in one direction, and the top torsional spring can further fix the fixed tooth when the bottom gear is ready to rotate clockwise, and the fixed tooth will not be fixed when the bottom gear rotates counterclockwise.

[0015] Further, the top of the center plate is fixedly provided with a fixed top plate, and the bottom of the fixed top plate abuts against the sidewall of the connecting rod.

[0016] Through the technical scheme, the fixed top plate can close the top of the center plate, so as to prevent the connecting rod from completely separating from the center plate, and the size of the fixed top plate can be greater than that of the connecting rod, so that the fixed top plate can more conveniently limit the connecting rod.

[0017] Further, the sleeve is externally fixedly provided with a fixed disc, the fixed disc is located in the sealing tank, and the inner rod penetrates through the sidewall of the fixed disc.

[0018] Through the technical scheme, the fixed disc is located in the sealing tank and does not contact the sealing cover, the fixed disc is fixedly connected with the sidewall of the sleeve and is not connected with the inner rod, so only the sleeve can drive the fixed disc to rotate or stop.

[0019] Further, the testing mechanism comprises a bidirectional screw rod, two moving blocks, a plurality of side supporting rods, a plurality of arc-shaped top plates and a plurality of telescopic inclined rods, the bidirectional screw rod is fixedly connected with the bottom of the inner rod, the two moving blocks are respectively arranged on two opposite threaded segments of the bidirectional screw rod, the plurality of side supporting rods are divided into two groups, one group of the side supporting rods is rotationally connected with the side wall of one moving block, the other group of the side supporting rods is rotationally connected with the side wall of the other moving block, the other ends of two side supporting rods located on the same straight line are rotationally connected with the side wall of the same arc-shaped top plate, and the plurality of telescopic inclined rods are rotationally connected with the bottom of the fixed disc.

[0020] Through the above technical scheme, the rotation of the servo motor can make the inner rod rotate with the bidirectional screw rod, so that the two moving blocks located on the two opposite threaded segments move towards each other or move in reverse, and due to the action of the side supporting rods, the arc-shaped top plate will gradually shrink or expand towards the direction of the bidirectional screw rod, thereby meeting the needs of abutting against radial carbon ring sealing elements of different sizes.

[0021] Further, the center ring is rotationally connected with the middle position of the bidirectional screw rod, the side wall of the center ring is fixedly connected with a plurality of side telescopic rods, and the other ends of the plurality of side telescopic rods are respectively fixedly connected with the side wall of the plurality of arc-shaped top plates.

[0022] Through the above technical scheme, the arrangement of the center ring and the side telescopic rods can limit the movement track of the arc-shaped top plate, and under the combined arrangement of the side supporting rods and the side telescopic rods, the arc-shaped top plate will only move along the direction of the side telescopic rods, which is more convenient for abutting against the radial carbon ring sealing element.

[0023] Further, a plurality of synchronous telescopic rods are fixedly arranged between the two moving blocks, a plurality of synchronous grooves are formed in the side wall of the center ring, and the plurality of synchronous telescopic rods are respectively clamped in the plurality of synchronous grooves.

[0024] Through the above technical scheme, the combined arrangement of the synchronous telescopic rods and the synchronous grooves can connect the center ring and the two moving blocks together, so that the center ring, the arc-shaped top plate, the telescopic inclined rod, the fixed disc and the sleeve are connected together, and thus only the sleeve needs to be prevented from rotating, so that the moving blocks and the center ring cannot rotate, and thus the moving blocks will not rotate when the bidirectional screw rod rotates, but will move along the direction of the bidirectional screw rod.

[0025] Further, an inner ratchet wheel is formed in the inner ring, the inner rod penetrates through the inner ratchet wheel, a center block is fixedly arranged on the side wall of the inner rod, and the side walls on both sides of the center block are respectively provided with ratchet teeth, and the two ratchet teeth are respectively abutted against the side wall of the inner ratchet wheel.

[0026] Through the technical scheme, the rotation of the inner ratchet wheel drives the rotation of the bottom gear, and the rotation of the bottom gear drives the rotation of the inner ratchet wheel, and the arrangement of the ratchet and the center block enables the inner rod to drive the inner ratchet wheel and the bottom gear to rotate only when the inner rod rotates in a specified direction, and when the inner rod rotates in another direction, the inner ratchet wheel and the bottom gear will not rotate with the inner rod.

[0027] Further, the center block is provided with a rotating groove on each side wall, a fixed rod is fixedly arranged in the rotating groove, the ratchet is arranged outside the fixed rod, and an internal torsion spring is arranged between the ratchet and the fixed rod.

[0028] Through the technical scheme, in the initial state, the arrangement of the internal torsion spring and the rotating groove enables the ratchet to always abut against the inner ratchet wheel, and the connection relationship between the ratchet and the inner ratchet wheel is more clearly indicated, and the abutting state of the ratchet and the inner ratchet wheel will not be affected regardless of the rotating direction.

[0029] The beneficial effects of the present application are as follows:

[0030] (1) The present application sets a test mechanism capable of clamping and rotating a radial carbon ring seal in the sealed tank, a plurality of arc-shaped top plates will abut against the inner wall of the radial carbon ring seal under the driving of the servo motor, and the top of the sealing cover is also provided with an adjusting indicating mechanism for facilitating the staff to master the opening degree of the test mechanism, so that the staff can better test the sealing performance of the radial carbon ring seal of different sizes in the simulated working scene by observing the relative position of the indicating arrow and the scale line.

[0031] (2) The present application sets the adjusting indicating mechanism on the top of the sealing cover, so that the staff can drive the insertion rod to move away from the limiting hole, thereby adjusting the position of the connecting rod and the servo motor, when the insertion rod is inserted into the limiting hole above, the indicating arrow is exactly at the same height as the scale line, at this time, the indicating arrow is directly opposite the zero scale position of the scale line, which facilitates the staff to master the rotating angle of the top gear, and the staff can select the appropriate angle of the top gear rotation according to the radial carbon ring seal of different sizes.

[0032] (3) The present application sets a synchronous telescopic rod and a synchronous groove between the moving block and the center ring, the synchronous telescopic rod and the synchronous groove are arranged together to connect the center ring and the two moving blocks together, thereby connecting the center ring, the arc-shaped top plate, the telescopic inclined rod, the fixed disc and the sleeve together, so that only the sleeve is prevented from rotating, the moving block and the center ring will not rotate, and the moving block will not rotate when the bidirectional screw rotates, but will move along the direction of the bidirectional screw. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1is the overall structure schematic diagram of the present application;

[0034] Figure 2 is the first perspective structure schematic diagram of the sealing cavity in the present application;

[0035] Figure 3 is the second perspective structure schematic diagram of the sealing cavity in the present application;

[0036] Figure 4 is the structure connection schematic diagram of the sealing tank and the sealing cover in the present application;

[0037] Figure 5 is the structure connection schematic diagram of the sealing cover in the present application;

[0038] Figure 6 is Figure 5 the local enlarged view of A in the figure;

[0039] Figure 7 is the structure connection schematic diagram of the indicating arrow and the fixed tooth in the present application;

[0040] Figure 8 is Figure 7 the local enlarged view of B in the figure;

[0041] Figure 9 is the structure connection schematic diagram of the testing mechanism in the present application;

[0042] Figure 10 is the structure connection schematic diagram between the fixed disc and the testing mechanism in the present application;

[0043] Figure 11 is the structure schematic diagram between the bottom gear and the fixed ring in the present application;

[0044] Figure 12 is the sectional view of the rotating groove in the present application.

[0045] Mark No. : 1, helium mass spectrometer leak detector; 2, leak detection port; 3, sealed tank; 4, sealing cover; 5, connecting port; 6, clamp; 7, servo motor; 8, drive gear; 9, top telescopic rod; 10, bottom gear; 11, top gear; 12, scale line; 13, fixed ring; 14, sleeve; 15, inner rod; 16, top ring; 17, bottom ring; 18, connecting rod; 19, center plate; 20, plug rod; 21, side plate; 22, finger plate; 23, indication arrow; 24, fixed clamping tooth; 25, side spring; 26, perforation; 27, limiting hole; 28, through hole; 29, rotating rod; 30, top torsional spring; 31, arc-shaped bottom plate; 32, arc-shaped baffle; 33, fixed top plate; 34, fixed disc; 35, bidirectional screw rod; 36, moving block; 37, side support rod; 38, arc-shaped top plate; 39, telescopic inclined rod; 40, center ring; 41, side telescopic rod; 42, synchronous telescopic rod; 43, synchronous groove; 44, inner ratchet wheel; 45, center block; 46, ratchet tooth; 47, rotating groove; 48, fixed rod; 49, internal torsional spring. DETAILED DESCRIPTION

[0046] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0047] As shown in Figure 1 - Figure 3 The embodiment provides a test device for radial carbon ring seal, which comprises a helium mass spectrometer leak detector 1 and a sealed cavity. The helium mass spectrometer leak detector 1 is provided with a leak detection port 2 at the top. The sealed cavity is divided into a sealed tank 3 and a sealing cover 4. The sealing cover 4 is buckled on the sealed tank 3. The sealed tank 3 is provided with a connecting port 5 at the bottom. The connecting port 5 is communicated with the leak detection port 2. The connecting port 5 and the leak detection port 2 are provided with a clamp 6 outside. The clamp 6 is arranged to better seal and connect the connecting port 5 and the leak detection port 2 together, thereby improving the detection accuracy of the radial carbon ring seal.

[0048] Further in combination with the contents in Figure 4 - Figure 7 The servo motor 7 is arranged above the sealing cover 4. The output end of the servo motor 7 is fixedly provided with a drive gear 8. The side wall of the other side of the drive gear 8 is fixedly provided with a top telescopic rod 9. The top telescopic rod 9 is fixedly arranged at the top of the sealing cover 4. The top of the sealing cover 4 is further provided with a bottom gear 10 and a top gear 11. The bottom gear 10 and the top gear 11 are coaxially arranged. The side wall of the top gear 11 is fixedly provided with a scale line 12. The scale line 12 is annularly arranged. Therefore, the staff can determine the rotation angle of the top gear 11 according to the inner diameter size of different radial carbon ring seals, thereby performing the operation outside the field of view.

[0049] With reference to the contents in Figure 5 - Figure 8 As can be seen from the contents in the top gear 11 and the drive gear 8 are engaged, the side wall of the servo motor 7 is provided with an adjusting indicating mechanism for adjusting the position of the servo motor 7, the adjusting indicating mechanism comprises a top ring 16, a bottom ring 17, a connecting rod 18, a center plate 19, a plug rod 20, a side plate 21, a finger plate 22, an indicating arrow 23, a fixed clamping tooth 24 and two side springs 25, the top ring 16 is fixedly arranged at the tail of the servo motor 7, the bottom ring 17 is rotatably arranged at the side wall of the output end of the servo motor 7, the connecting rod 18 is fixedly arranged between the top ring 16 and the bottom ring 17, the connecting rod 18 is U-shaped with the opening facing the top gear 11, the two ends of the connecting rod 18 are provided with through holes 26, the center plate 19 passes through the two through holes 26, the top of the center plate 19 is fixedly provided with a fixed top plate 33, the bottom of the fixed top plate 33 abuts against the side wall of the connecting rod 18, the staff can drive the plug rod 20 to move away from the limiting hole 27 by moving the finger plate 22, thereby adjusting the position of the connecting rod 18 and the servo motor 7, when the plug rod 20 is inserted into the upper limiting hole 27, the indicating arrow 23 is just at the same height with the scale line 12, the indicating arrow 23 is opposite to the zero scale position of the scale line 12, which is convenient for the staff to master the rotation angle of the top gear 11.

[0050] The side wall of the center plate 19 is provided with two limiting holes 27, the side wall of the connecting rod 18 is provided with a through hole 28, the plug rod 20 passes through the through hole 28 and the limiting hole 27 in sequence, the side plate 21 is fixedly arranged at the side wall of the plug rod 20, the two side springs 25 are respectively fixedly arranged between the side plate 21 and the connecting rod 18, the finger plate 22 is fixedly arranged at the side wall of the plug rod 20, the finger plate 22 abuts against the side wall of the connecting rod 18, the indicating arrow 23 is fixedly arranged at the bottom of the connecting rod 18, the indicating arrow 23 points to the scale line 12, the fixed clamping tooth 24 is fixed at the bottom of the indicating arrow 23, the fixed clamping tooth 24 is engaged with the bottom gear 10, the distance between the fixed clamping tooth 24 and the indicating arrow 23 is less than the distance between the bottom gear 10 and the sealing cover 4, so when the staff adjusts the indicating arrow 23 downward, even if the drive gear 8 contacts the bottom gear 10, the fixed clamping tooth 24 will not contact the sealing cover 4.

[0051] The top of the fixed clamping tooth 24 is rotatably connected with a rotating rod 29, the other end of the rotating rod 29 is rotatably connected with the bottom of the indicating arrow 23, the rotating rod 29 is externally sleeved with a top torsional spring 30, the top of the fixed clamping tooth 24 is fixedly provided with an arc-shaped bottom plate 31, the bottom of the indicating arrow 23 is fixedly provided with an arc-shaped baffle 32, the arc-shaped bottom plate 31 abuts against the side wall of the arc-shaped baffle 32, the arc-shaped baffle 32 and the bottom plate are jointly arranged, so that the fixed clamping tooth 24 can only rotate in one direction, and the arrangement of the top torsional spring 30 can further make the fixed clamping tooth 24 clamp the bottom gear 10 when the bottom gear 10 is ready to rotate clockwise, and the bottom gear 10 will not be affected by the fixing effect of the fixed clamping tooth 24 when rotating counterclockwise.

[0052] From Figure 9 As can be seen from the content in Figure 10 The bottom gear 10 is fixedly provided with a sleeve 14 at the bottom, the sleeve 14 is sealed through the sealing cover 4, the top gear 11 is fixedly provided with an inner rod 15 at the bottom, the inner rod 15 penetrates the inside of the sleeve 14, the sleeve 14 is fixedly provided with a fixed disc 34 outside, the fixed disc 34 is located inside the sealing tank 3, the inner rod 15 penetrates the side wall of the fixed disc 34, the fixed disc 34 is located inside the sealing tank 3 and does not contact the sealing cover 4, the fixed disc 34 is fixedly connected with the side wall of the sleeve 14 and is not connected with the inner rod 15, so only the sleeve 14 can drive the fixed disc 34 to rotate or stop.

[0053] The inner rod 15 and the sleeve 14 extend into the inside of the sealing tank 3 and are provided with a test mechanism for testing radial carbon ring seals, the test mechanism includes a bidirectional screw 35, two moving blocks 36, a plurality of side edge supporting rods 37, a plurality of arc-shaped top plates 38 and a plurality of telescopic inclined rods 39, the bidirectional screw 35 is fixedly connected with the bottom of the inner rod 15, the two moving blocks 36 are respectively arranged on two opposite threaded segments of the bidirectional screw 35, the plurality of side edge supporting rods 37 are divided into two groups, one group of side edge supporting rods 37 is rotatably connected with the side wall of one moving block 36, the other group of side edge supporting rods 37 is rotatably connected with the side wall of the other moving block 36, the other ends of two side edge supporting rods 37 located on the same straight line are rotatably connected with the side wall of the same arc-shaped top plate 38, the plurality of telescopic inclined rods 39 are rotatably connected with the bottom of the fixed disc 34, the other ends of the telescopic inclined rods 39 are rotatably connected with the top side wall of the arc-shaped top plate 38, the rotation of the servo motor 7 will make the inner rod 15 and the bidirectional screw 35 rotate together, and then make the two moving blocks 36 on the two opposite threaded segments move towards each other or move in reverse, due to the action of the side edge supporting rods 37, the arc-shaped top plate 38 will gradually shrink or expand towards the direction of the bidirectional screw 35, thereby meeting the needs of abutting against radial carbon ring seals of different sizes.

[0054] The center ring 40 is rotatably connected at the middle position of the bidirectional screw 35, the center ring 40 is fixedly connected with a plurality of side edge telescopic rods 41 on the side wall, the other ends of the plurality of side edge telescopic rods 41 are respectively fixedly connected with the side wall of the plurality of arc-shaped top plates 38, the setting of the center ring 40 and the side edge telescopic rods 41 can limit the movement track of the arc-shaped top plate 38, under the common setting of the side edge supporting rods 37 and the side edge telescopic rods 41, the arc-shaped top plate 38 will only move along the direction of the side edge telescopic rods 41, which is more convenient for the arc-shaped top plate 38 to abut against the radial carbon ring seal.

[0055] A plurality of synchronous telescopic rods 42 are fixedly arranged between the two moving blocks 36, a plurality of synchronous grooves 43 are formed in the side wall of the center ring 40, and the plurality of synchronous telescopic rods 42 are respectively clamped in the plurality of synchronous grooves 43. The synchronous telescopic rods 42 and the synchronous grooves 43 are arranged together to connect the center ring 40 and the two moving blocks 36 together, so that the center ring 40, the arc-shaped top plate 38, the telescopic inclined rod 39, the fixed disc 34 and the sleeve 14 are connected together. Therefore, only the sleeve 14 needs to be prevented from rotating, so that the moving block 36 and the center ring 40 cannot rotate. Therefore, the moving block 36 will not rotate when the bidirectional screw rod 35 rotates, but will move along the direction of the bidirectional screw rod 35.

[0056] From Figure 11 With Figure 12 As can be seen from the above, the bottom gear 10 is fixedly provided with a fixed ring 13 at the top, the fixed ring 13 is internally provided with an internal ratchet wheel 44, the internal rod 15 passes through the internal ratchet wheel 44, the internal rod 15 is fixedly provided with a center block 45 on the side wall, the center block 45 is provided with a ratchet tooth 46 on both side walls, the two ratchet teeth 46 are respectively abutted against the side wall of the internal ratchet wheel 44, the center block 45 is provided with a rotating groove 47 on both side walls, the rotating groove 47 is fixedly provided with a fixed rod 48, the ratchet tooth 46 is sleeved outside the fixed rod 48, and an internal torsion spring 49 is arranged between the ratchet tooth 46 and the fixed rod 48. The rotation of the internal ratchet wheel 44 drives the rotation of the bottom gear 10, and the rotation of the bottom gear 10 drives the rotation of the internal ratchet wheel 44. The arrangement of the ratchet tooth 46 and the center block 45 enables the internal rod 15 to rotate only in a specified direction, so as to drive the internal ratchet wheel 44 and the bottom gear 10 to rotate together. When the internal rod 15 rotates in another direction, the internal ratchet wheel 44 and the bottom gear 10 will not rotate with it. In the initial state, the arrangement of the internal torsion spring 49 and the rotating groove 47 enables the ratchet tooth 46 to always abut against the internal ratchet wheel 44, which more clearly indicates the connection relationship between the ratchet tooth 46 and the internal ratchet wheel 44. Regardless of the direction of rotation, the abutting state of the ratchet tooth 46 and the internal ratchet wheel 44 will not be affected.

[0057] The working principle of the embodiment is as follows. First, the radial carbon ring seal to be measured is placed in the middle position inside the sealing tank 3, then the sealing cover 4 is buckled, the bidirectional screw rod 35 and the arc-shaped top plate 38 are inserted into the middle of the radial carbon ring seal, the connecting port 5 is communicated with the leak detection port 2, and the two are tightly connected together by the clamp 6.

[0058] The servo motor 7 is driven, at this time, the driving gear 8 is in meshing state with the top gear 11, the indication arrow 23 is at the same height with the scale line 12 on the top of the top gear 11, the rotation of the servo motor 7 can make the top gear 11 rotate with the inner rod 15, at this time, the central block 45 and the ratchet 46 cannot drive the inner ratchet 44 to rotate, therefore, the rotation of the bidirectional screw rod 35 can make the two moving blocks 36 on the two opposite screw sections move reversely, due to the effect of the side edge support rod 37, the arc-shaped top plate 38 can gradually expand outward, and then abut against the inner wall of the radial carbon ring seal, the worker can determine the rotation angle of the top gear 11 by observing the scale line 12, so that the worker can fix the position of the radial carbon ring seal when the inside of the sealing tank 3 cannot be seen;

[0059] After the top gear 11 rotates to the specified angle, the worker can move the finger plate 22 transversely, so that the inserting rod 20 is away from the limiting hole 27, then the position of the connecting rod 18 and the servo motor 7 can be adjusted, so that the inserting rod 20 is inserted into the lower limiting hole 27, at this time, the driving gear 8 is in meshing state with the bottom gear 10, then the servo motor 7 is driven, so that the bottom gear 10 is rotated, the sleeve 14 fixed on the bottom of the bottom gear 10 can drive the telescopic inclined rod 39 and the arc-shaped top plate 38 to rotate with the radial carbon ring seal, so as to simulate the actual working environment, finally, the helium mass spectrometer is started to detect the sealing performance of the radial carbon ring seal.

[0060] The above merely describes the preferred embodiment of the present application, but not for limiting the protection scope of the present application.

Claims

1. A test device for radial carbon ring seals, comprising a helium mass spectrometer leak detector (1) and a sealed chamber, characterized in that: The helium mass spectrometer (1) top is provided with a leak detection port (2), the sealed cavity is divided into a sealed tank (3) and a sealing cover (4), the sealing cover (4) is buckled on the sealed tank (3), the bottom of the sealed tank (3) is provided with a connecting port (5), the connecting port (5) is communicated with the leak detection port (2), and the connecting port (5) and the leak detection port (2) are provided with a clamp (6) outside; The servo motor (7) is arranged above the sealing cover (4), the servo motor (7) is fixedly provided with a driving gear (8) at the output end, the driving gear (8) is fixedly provided with a top telescopic rod (9) on the other side wall, the top telescopic rod (9) is fixedly arranged on the top of the sealing cover (4), the top of the sealing cover (4) is also provided with a bottom gear (10) and a top gear (11), the bottom gear (10) and the top gear (11) are coaxially arranged, the side wall of the top gear (11) is fixedly provided with a scale line (12), the top gear (11) is engaged with the driving gear (8), and the side wall of the servo motor (7) is provided with an adjusting indicating mechanism for adjusting the position of the servo motor (7); The bottom gear (10) is fixedly provided with a fixed ring (13) on the top, the bottom gear (10) is fixedly provided with a sleeve (14) on the bottom, the sleeve (14) is sealed through the sealing cover (4), the bottom gear (11) is fixedly provided with an inner rod (15), the inner rod (15) passes through the inside of the sleeve (14), the sleeve (14) is fixedly provided with a fixed disc (34) outside, the fixed disc (34) is located in the inside of the sealed tank (3), and the inner rod (15) passes through the side wall of the fixed disc (34); The inner rod (15) and the sleeve (14) extend into the inside of the sealed tank (3) and are provided with a test mechanism for testing radial carbon ring seals, the test mechanism comprises a bidirectional screw (35), two moving blocks (36), a plurality of side supporting rods (37), a plurality of arc top plates (38) and a plurality of telescopic inclined rods (39), the bidirectional screw (35) is fixedly connected with the bottom of the inner rod (15), the two moving blocks (36) are arranged on two opposite threaded segments of the bidirectional screw (35) respectively, a plurality of the side supporting rods (37) are divided into two groups, one group of the side supporting rods (37) is rotatably connected with the side wall of one moving block (36), another group of the side supporting rods (37) is rotatably connected with the side wall of another moving block (36), two side supporting rods (37) located on the same straight line are rotatably connected with the side wall of the same arc top plate (38) at the other end, a plurality of the telescopic inclined rods (39) are rotatably connected with the bottom of the fixed disc (34), and the other end of the telescopic inclined rod (39) is rotatably connected with the top side wall of the arc top plate (38).

2. The test device for radial carbocyclic seals according to claim 1, characterized in that The adjusting indicating mechanism comprises a top ring (16), a bottom ring (17), a connecting rod (18), a center plate (19), a plug rod (20), a side plate (21), a finger plate (22), an indicating arrow (23), a fixed clamping tooth (24) and two side edge springs (25), the top ring (16) is fixedly arranged at the tail of the servo motor (7), the bottom ring (17) is rotatably arranged on the side wall of the output end of the servo motor (7), the connecting rod (18) is fixedly arranged between the top ring (16) and the bottom ring (17), the connecting rod (18) is U-shaped with an opening facing the top gear (11), the connecting rod (18) is provided with a through hole (26) on the side wall of each end, the center plate (19) passes through the two through holes (26), the side wall of the center plate (19) is provided with two limiting holes (27), the side wall of the connecting rod (18) is provided with a through hole (28), the plug rod (20) passes through the through hole (28) and the limiting hole (27) in sequence, the side plate (21) is fixedly arranged on the side wall of the plug rod (20), the two side edge springs (25) are fixedly arranged between the side plate (21) and the connecting rod (18) respectively, the finger plate (22) is fixedly arranged on the side wall of the plug rod (20), the finger plate (22) abuts against the side wall of the connecting rod (18), the indicating arrow (23) is fixedly arranged at the bottom of the connecting rod (18), the indicating arrow (23) points to the scale line (12), the fixed clamping tooth (24) is fixed at the bottom of the indicating arrow (23), and the fixed clamping tooth (24) is engaged with the bottom gear (10).

3. The test device for radial carbon ring seals according to claim 2, characterized in that The top of the fixed clamping tooth (24) is rotatably connected with a rotating rod (29), the other end of the rotating rod (29) is rotatably connected with the bottom of the indicating arrow (23), the outer portion of the rotating rod (29) is sleeved with a top torsional spring (30), the top of the fixed clamping tooth (24) is fixedly provided with an arc-shaped bottom plate (31), the bottom of the indicating arrow (23) is fixedly provided with an arc-shaped baffle (32), and the arc-shaped bottom plate (31) abuts against the side wall of the arc-shaped baffle (32).

4. The test device for radial carbon ring seals according to claim 2, characterized in that The top of the center plate (19) is fixedly provided with a fixed top plate (33), and the bottom of the fixed top plate (33) abuts against the side wall of the connecting rod (18).

5. The test device for radial carbocyclic seals of claim 1, wherein, The middle position of the bidirectional screw rod (35) is rotatably connected with a center ring (40), the side wall of the center ring (40) is fixedly connected with a plurality of side edge telescopic rods (41), and the other ends of the plurality of side edge telescopic rods (41) are fixedly connected with the side walls of a plurality of arc-shaped top plates (38) respectively.

6. The test device for radial carbon ring seals according to claim 5, characterized in that A plurality of synchronous telescopic rods (42) are fixedly arranged between the two moving blocks (36), the side wall of the center ring (40) is provided with a plurality of synchronous grooves (43), and the plurality of synchronous telescopic rods (42) are clamped in the plurality of synchronous grooves (43) respectively.

7. The test device for radial carbocyclic seals of claim 1, wherein, The fixed ring (13) is internally provided with an internal ratchet wheel (44), the internal rod (15) passes through the internal ratchet wheel (44), the internal rod (15) is fixedly provided with a center block (45) on the side wall, the center block (45) is provided with a ratchet tooth (46) on the side wall of both sides, and the two ratchet teeth (46) are respectively abutted against the side wall of the internal ratchet wheel (44).

8. The test device for radial carbon ring seals according to claim 7, characterized in that The center block (45) is provided with a rotating groove (47) on the side wall of both sides, a fixed rod (48) is fixedly arranged in the rotating groove (47), the ratchet tooth (46) is sleeved outside the fixed rod (48), and an internal torsion spring (49) is arranged between the ratchet tooth (46) and the fixed rod (48).

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