A rotary machine shaft seal leak testing device

Abstract

The utility model discloses a rotating machinery shaft seal leak testing device, including the device body, the upper end of device body is close to rear side fixed setting and has the fixed frame, the upper end fixed penetration of fixed frame is provided with electric telescopic handle, the lower end fixed connection of electric telescopic handle has the support sliding bracket, the lower end of support sliding bracket is close to the front side and is equipped with two limit sliding slot, the limit sliding slot in sliding connection has the support, the lower end fixed connection of support has the first interface board frame, the first interface board frame lower end is fixedly connected with the second interface board frame through the first bolt, through the mechanical shaft seal penetration setting in the sleeve outer ring, installs in the sealed detection cylinder, through both sides sealed detection cylinder for building the sealed environment simulation of mechanical shaft seal use, through waterproof motor, pivot, second gear and first gear drive sleeve rod rotation, and sleeve rod drives sleeve rotation through key block, key groove, thereby drive the dynamic ring rotation of mechanical shaft seal, for simulating the situation of mechanical shaft seal use.

Description

Technical Field

[0001] This utility model relates to the field of rotating machinery shaft seal testing technology, specifically a rotating machinery shaft seal leak testing device. Background Technology

[0002] Mechanical shaft seals mainly consist of stationary rings, rotating rings, elastic elements, and auxiliary seals. Mechanical shaft seals are crucial in rotating machinery; for example, the sealing performance of pumps and compressors directly affects equipment operation. Therefore, during the production or testing of mechanical shaft seals, leak testing is usually required to test their sealing performance. Common shaft seal testing methods include pneumatic testing, hydrostatic testing, vacuum testing, and soap bubble testing. Among these, the soap bubble method is suitable for rapid qualitative leak detection. The soap bubble method typically involves directly applying soapy water to all exposed gaps and stationary mating surfaces of the shaft seal where leaks are possible, and observing whether bubbles are generated to quickly determine the sealing condition. However, when testing shaft seals using the existing soap bubble method, the mechanical shaft seal must be completely stationary during the test, which cannot simulate the testing effect of the shaft seal under normal use. Utility Model Content

[0003] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of this section, the abstract, and the title, and such simplifications or omissions should not be used to limit the scope of this utility model.

[0004] In view of the problems existing in the above and / or existing rotary machinery shaft seal leak testing devices, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a rotary mechanical shaft seal leak testing device. The mechanical shaft seal is installed through the outer ring of a sleeve and inside a sealing detection cylinder. The sealing detection cylinders on both sides are used to simulate the sealing environment during the use of the mechanical shaft seal. A waterproof motor, rotating shaft, second gear, and first gear drive the sleeve rod to rotate. The sleeve rod, through a key block and keyway, drives the sleeve to rotate, thereby causing the rotating ring of the mechanical shaft seal to rotate, simulating the conditions during use. External compressed gas is blown into the sealing detection cylinder through inlet pipes on both sides. The sealing detection cylinder is then immersed in a soapy water tank. By observing whether a continuous and stable chain of bubbles continuously emerges, the seal leakage situation can be quickly determined.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0007] A rotary machinery shaft seal leak testing device includes a device body. A fixed frame is fixedly mounted on the upper end of the device body near the rear side. An electric telescopic rod is fixedly threaded through the upper end of the fixed frame. A supporting slide is fixedly connected to the lower end of the electric telescopic rod. Two limiting grooves are formed on the lower end of the supporting slide near the front side. A bracket is slidably connected within the limiting grooves. A first receiving plate frame is fixedly connected to the lower end of the bracket. A second receiving plate frame is fixedly connected to the lower end of the first receiving plate frame by a first bolt. The second receiving plate frame is fixedly mounted on the outer end of a sealing detection cylinder. Four sealing detection cylinders are fixedly arranged in a ring array on the inner wall of the sealing detection cylinder. A mounting base has a first bearing outer ring mounted on the left side via a first external fastening bolt, and a second bearing outer ring mounted on the right side via a second external fastening bolt. A sleeve is located inside the first bearing outer ring, and a sleeve rod is located inside the second bearing outer ring. The sleeve rod and sleeve are engaged. A first gear is fixedly inserted through the outer ring of the sleeve rod near the right side, and the first gear meshes with a second gear. The second gear is fixedly inserted through the outer ring of a rotating shaft, which is connected to the output shaft of a waterproof motor. The waterproof motor is located inside a sealing detection cylinder on the right side.

[0008] As a preferred embodiment of the rotary mechanical shaft seal leak testing device of the present invention, a groove is provided through the upper end of the device body near the front side, and a soap water tank is placed in the groove.

[0009] In a preferred embodiment of the rotary machinery shaft seal leak testing device of this utility model, the rear side of the support slide is slidably connected to the fixed frame via a limiting slider, and the limiting slider is fixedly mounted on the side wall of the fixed frame.

[0010] In a preferred embodiment of the rotary machinery shaft seal leak testing device of this utility model, two of the second receiving plate frame and two of the sealing detection cylinders are provided, and the two sealing detection cylinders are connected by a screw and a fixing nut.

[0011] As a preferred embodiment of the rotary machinery shaft seal leak testing device of this utility model, an outlet pipe and an inlet pipe are connected to the upper end of the seal detection cylinder, and a pressure relief valve is provided on the outlet pipe.

[0012] In a preferred embodiment of the rotary machinery shaft seal leak testing device of this utility model, a first mounting hole is provided through the outer ring of the first bearing, a first inner ring is provided inside the outer ring of the first bearing, a first ball is provided between the inner ring of the first bearing and the outer ring of the first bearing, a second bolt is provided through the inner ring of the first bearing, the inner end of the second bolt is in contact with the sleeve, the sleeve is provided through the inner ring of the inner ring of the first bearing, and a keyway is provided on the inner wall of the sleeve.

[0013] In a preferred embodiment of the rotary machinery shaft seal leak testing device of this utility model, a second mounting hole is provided through the outer ring of the second bearing, a second inner ring is provided inside the outer ring of the second bearing, a second ball is provided between the inner ring of the second bearing and the outer ring of the second bearing, a third bolt is provided through the inner ring of the second bearing, the inner end of the third bolt is in contact with the sleeve rod, the sleeve rod is provided through the inner ring of the inner ring of the second bearing, and a key block is fixedly provided on the outer ring of the sleeve rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: By installing the mechanical shaft seal through the outer ring of the sleeve and inside the sealing detection cylinder, the sealing detection cylinders on both sides are used to simulate the sealing environment when the mechanical shaft seal is in use. The sleeve rod is driven to rotate by the waterproof motor, rotating shaft, second gear and first gear. The sleeve rod drives the sleeve to rotate through the key block and keyway, thereby driving the rotating ring of the mechanical shaft seal to rotate, which is used to simulate the situation when the mechanical shaft seal is in use. External compressed gas is blown into the sealing detection cylinder through the inlet pipes on both sides. The sealing detection cylinder is immersed in a soapy water tank. By observing whether there is a continuous and stable chain of bubbles, the sealing leakage can be quickly judged. When there is no leakage, when the gas pressure inside the sealing detection cylinder reaches a certain level, it is released through the outlet pipe. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the supporting slide and limiting slide groove structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the sealing detection cylinder of this utility model;

[0019] Figure 4 This is a schematic diagram of the outer ring of the first bearing and the first mounting hole of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the second bearing outer ring and the second mounting hole of this utility model;

[0021] Figure 6 This is a cross-sectional view of the sealing detection cylinder and a schematic diagram of the mounting base structure of this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the sleeve, keyway, sleeve rod, and key block of this utility model.

[0023] In the diagram: 1. Device body; 2. Tank; 3. Soap water tank; 4. Fixing frame; 5. Electric telescopic rod; 6. Support slide; 7. Limiting slider; 8. Limiting slide groove; 9. Bracket; 10. First connecting plate frame; 11. First bolt; 12. Second connecting plate frame; 13. Sealing detection cylinder; 14. Outlet pipe; 15. Inlet pipe; 16. Screw; 17. Fixing nut; 18. Mounting seat; 19. First bearing outer ring; 20. Second bearing outer ring; 21. First mounting hole; 22. First bearing inner ring; 23. First ball; 24. Sleeve; 25. Keyway; 26. Second bolt; 27. Second mounting hole; 28. Second bearing inner ring; 29. ​​Second ball; 30. Sleeve rod; 31. Third bolt; 32. First gear; 33. Second gear; 34. Waterproof motor; 35. Key block. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0027] This utility model provides a rotary mechanical shaft seal leak testing device. The mechanical shaft seal is installed through the outer ring of a sleeve and inside a sealing detection cylinder. The sealing detection cylinders on both sides are used to simulate the sealing environment when the mechanical shaft seal is in use. A waterproof motor, a rotating shaft, a second gear, and a first gear drive the sleeve rod to rotate. The sleeve rod drives the sleeve to rotate through a key block and a keyway, thereby driving the rotating ring of the mechanical shaft seal to rotate, simulating the conditions when the mechanical shaft seal is in use. External compressed gas is blown into the sealing detection cylinder through the inlet pipes on both sides. The sealing detection cylinder is immersed in a soapy water tank. By observing whether a continuous and stable chain of bubbles continuously emerges, the sealing leakage situation can be quickly determined.

[0028] Figures 1-7 The diagram shown is an overall structural schematic of one embodiment of the rotary machinery shaft seal leak testing device of this utility model. Please refer to [link / reference]. Figures 1-7 This embodiment of a rotary machinery shaft seal leak testing device includes a device body 1. A fixed frame 4 is fixedly installed on the upper end of the device body 1 near the rear side. An electric telescopic rod 5 is fixedly installed through the upper end of the fixed frame 4. A support slide 6 is fixedly connected to the lower end of the electric telescopic rod 5. Two limiting slide grooves 8 are opened on the lower end of the support slide 6 near the front side. A bracket 9 is slidably connected in the limiting slide grooves 8. A first receiving plate frame 10 is fixedly connected to the lower end of the bracket 9. A second receiving plate frame 12 is fixedly connected to the lower end of the first receiving plate frame 10 by a first bolt 11. The second receiving plate frame 12 is fixedly installed on the outer end of the sealing detection cylinder 13. Four sealing detection cylinders are fixedly arranged in a ring array on the inner wall of the sealing detection cylinder 13. Mounting base 18, the left mounting base 18 is equipped with a first bearing outer ring 19 by a first external fastening bolt, the right mounting base 18 is equipped with a second bearing outer ring 20 by a second external fastening bolt, a sleeve 24 is provided inside the first bearing outer ring 19, a sleeve rod 30 is provided inside the second bearing outer ring 20, the sleeve rod 30 and the sleeve 24 are engaged and connected, a first gear 32 is fixedly and through the outer ring of the sleeve rod 30 near the right side, the first gear 32 is engaged with a second gear 33, the second gear 33 is fixedly and through the outer ring of the rotating shaft, the rotating shaft is connected to the output shaft of the waterproof motor 34, the waterproof motor 34 is located inside the sealing detection cylinder 13 on the right side.

[0029] The bracket 9 is slidably connected to the set slider and the limiting slide groove 8. The bracket 9 slides and adjusts within the limiting slide groove 8 to allow the sealing detection cylinders 13 on both sides to move closer or further apart. The sealing detection cylinders 13 on both sides are connected and fixed by the screw 16 and the fixing nut 17. The first connecting plate frame 10 is connected by the first bolt 11 and the second connecting plate frame 12 for the installation, fixing or disassembly of the sealing detection cylinders 13, which is convenient for replacing different sealing detection cylinders 13 according to different mechanical shaft seals. The sleeve rod 30 is driven to rotate by the waterproof motor 34, the rotating shaft, the second gear 33 and the first gear 32. The key block 35 and keyway 25 drive the sleeve 24 to rotate, thereby driving the rotating ring of the mechanical shaft seal to rotate. This is used to simulate the use of the mechanical shaft seal. The specific installation method of the mechanical shaft seal, and how it is installed inside the sealing test cylinder 13, refers to existing mechanical shaft seal installation methods. This patent mainly simulates leak testing of the mechanical shaft seal during normal installation and use; therefore, its installation method is the same as existing installations. The installation structure is not specifically shown in the accompanying drawings, and the specific installation will not be described in detail in this patent. After the mechanical shaft seal is installed, the left and right spaces of the sealing test cylinders 13 on both sides are... The sealing barrier is in place. External compressed gas is blown into the sealing test cylinder 13 through the inlet pipes 15 on both sides. If there is a problem with the mechanical shaft seal, a continuous and stable chain of bubbles will emerge when the sealing test cylinder 13 is immersed in the soapy water tank 3. If there is no problem with the seal and no leakage, the gas pressure inside the sealing test cylinder 13 will reach a certain level and be released through the outlet pipe 14. The specific pressure value for releasing pressure is set according to the test results. To avoid other possible interference, the sealing test cylinder 13 is first immersed in the soapy water tank 3, gas is introduced, and it is observed whether continuous bubbles are generated before operation. The drive simulates the normal operation of the mechanical shaft seal for seal testing. It observes whether there is continuous bubble generation, indicating a seal leakage problem. The generated bubbles are a continuous and stable chain, and the bubbles are generated at the connection of the seal detection cylinder 13, rather than possible interference bubbles. They appear randomly in different locations, vary in size, and are easily broken. A through pipe is provided at the upper end of the seal detection cylinder 13 on the right side, and the upper end of the through pipe is at a similar height to the inlet pipe 15. It is used for the connection between the internal waterproof motor 34 and the external one. If the waterproof motor 34 is a hydraulic motor, it is used for the passage of hydraulic oil pipe. A seal is provided at the end of the through pipe.

[0030] The upper end of the device body 1 has a through groove 2 near the front side, and a soap water tank 3 is placed in the groove 2. The rear side of the support slide 6 is slidably connected to the fixed frame 4 through a limiting slider 7. The limiting slider 7 is fixedly set on the side wall of the fixed frame 4.

[0031] The limiting slider 7 enhances the sliding stability of the support slide 6, which is slidably connected to the limiting slider 7 through the opening of the slide groove.

[0032] Two second plate holders 12 and two sealing test cylinders 13 are provided. The two sealing test cylinders 13 are connected by a screw 16 and a fixing nut 17. An outlet pipe 14 and an inlet pipe 15 are connected to the upper end of the sealing test cylinder 13. A pressure relief valve is provided on the outlet pipe 14.

[0033] The second connecting plate frame 12 has a first bolt hole, which corresponds to the third mounting hole on the first connecting plate frame 10. The first bolt 11 is threaded through the third mounting hole and connected to the first bolt hole. The sealing detection cylinder 13 has a fourth mounting hole, which is threaded through the fourth mounting hole and connected to the nut 17 for fixing. The sealing detection cylinder 13 is connected and fixed.

[0034] A first mounting hole 21 is provided through the outer ring 19 of the first bearing. A first inner ring 22 is provided inside the outer ring 19 of the first bearing. A first ball 23 is provided between the inner ring 22 and the outer ring 19 of the first bearing. A second bolt 26 is provided through the inner ring 22 of the first bearing. The inner end of the second bolt 26 is in contact with the sleeve 24. The sleeve 24 is provided through the inner ring of the inner ring 22 of the first bearing. A keyway 25 is provided on the inner wall of the sleeve 24.

[0035] The outer ring 19 of the first bearing passes through the first mounting hole 21 and is threaded into the second bolt hole on the mounting base 18 on the left side under the action of the first external fastening bolt.

[0036] A second mounting hole 27 is provided through the outer ring 20 of the second bearing. A second inner ring 28 is provided inside the outer ring 20 of the second bearing. A second ball 29 is provided between the inner ring 28 of the second bearing and the outer ring 20 of the second bearing. A third bolt 31 is provided through the inner ring 28 of the second bearing. The inner end of the third bolt 31 is in contact with the sleeve 30. The sleeve 30 is provided through the inner ring of the inner ring 28 of the second bearing. A key block 35 is fixedly provided on the outer ring of the sleeve 30.

[0037] The outer ring 20 of the second bearing passes through the second mounting hole 27 and is threaded into the third bolt hole on the mounting base 18 on the right side under the action of the second external fastening bolt. It is used by the key block 35 and the keyway 25 to drive the sleeve 24 to rotate through the sleeve rod 30.

[0038] Combination Figures 1-7The specific usage process of the rotary mechanical shaft seal leak test device of this embodiment is as follows: The bracket 9 is slidably connected by the set slider and the limiting slide groove 8. The bracket 9 is slidably adjusted in the limiting slide groove 8 to allow the sealing test cylinders 13 on both sides to move closer or further apart. The sealing test cylinders 13 on both sides are connected and fixed by the screw 16 and the fixing nut 17. The first connecting plate frame 10 is connected by the first bolt 11 and the second connecting plate frame 12 for the installation, fixing or disassembly of the sealing test cylinders 13, so as to facilitate the replacement of different sealing test cylinders 13 according to different mechanical shaft seals. The electric telescopic rod 5 pushes the support slide 6 to slide stably on the limiting slider 7. The sealing test cylinder 13 is first immersed in the soap water tank 3 and gas is introduced to observe whether continuous bubbles are generated. Then, the waterproof motor 34, the rotating shaft, the second gear 33 and the first gear 32 drive the sleeve rod 30 to rotate. The sleeve rod 30 drives the sleeve 24 to rotate through the key block 35 and the keyway 25, thereby driving the rotating ring of the mechanical shaft seal to rotate, which is used to simulate the situation when the mechanical shaft seal is in use and to observe whether bubbles are generated.

[0039] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A rotating machinery shaft seal leak testing device, comprising a device body (1), characterized in that: A fixed frame (4) is fixedly installed on the upper end of the device body (1) near the rear side. An electric telescopic rod (5) is fixedly installed through the upper end of the fixed frame (4). A support slide (6) is fixedly connected to the lower end of the electric telescopic rod (5). Two limiting slide grooves (8) are opened on the lower end of the support slide (6) near the front side. A bracket (9) is slidably connected in the limiting slide groove (8). A first connecting plate frame (10) is fixedly connected to the lower end of the bracket (9). A second connecting plate frame (12) is fixedly connected to the lower end of the first connecting plate frame (10) by a first bolt (11). The second connecting plate frame (12) is fixedly installed on the outer side of the sealing detection cylinder (13). Four mounting seats (18) are fixedly installed in a ring array on the inner wall of the sealing detection cylinder (13). The mounting seat on the left side (18) is equipped with a first bearing outer ring (19) by a first external fastening bolt. The mounting base (18) on the right side is equipped with a second bearing outer ring (20) by a second external fastening bolt. A sleeve (24) is provided inside the first bearing outer ring (19). A sleeve rod (30) is provided inside the second bearing outer ring (20). The sleeve rod (30) and the sleeve (24) are engaged. A first gear (32) is fixedly provided through the outer ring of the sleeve rod (30) near the right side. The first gear (32) is meshed with a second gear (33). The second gear (33) is fixedly provided through the outer ring of the rotating shaft. The rotating shaft is connected to the output shaft of the waterproof motor (34). The waterproof motor (34) is located inside the sealing detection cylinder (13) on the right side.

2. A rotary mechanical shaft seal leak detector according to claim 1, wherein: The upper end of the device body (1) has a groove (2) that extends through the front side, and a soap water tank (3) is placed inside the groove (2).

3. A rotary mechanical shaft seal leak detector as claimed in claim 1, wherein: The rear side of the support slide (6) is slidably connected to the fixed frame (4) by a limiting slider (7), and the limiting slider (7) is fixedly installed on the side wall of the fixed frame (4).

4. A rotary mechanical shaft seal leak detector as claimed in claim 1, wherein: The second receiving plate frame (12) and the sealing detection cylinder (13) are both provided in twos, and the two sealing detection cylinders (13) are connected to each other by a screw (16) and a fixing nut (17).

5. A rotary mechanical shaft seal leakage detection device as claimed in claim 1, wherein: The upper end of the sealing detection cylinder (13) is connected to an outlet pipe (14) and an inlet pipe (15), and a pressure relief valve is provided on the outlet pipe (14).

6. A rotary mechanical shaft seal leak detector as claimed in claim 1, wherein: A first mounting hole (21) is provided through the outer ring (19) of the first bearing. A first bearing inner ring (22) is provided inside the outer ring (19). A first ball (23) is provided between the first bearing inner ring (22) and the first bearing outer ring (19). A second bolt (26) is provided through the inner ring (22). The inner end of the second bolt (26) is in contact with the sleeve (24). The sleeve (24) is provided through the inner ring of the first bearing inner ring (22). A keyway (25) is provided on the inner wall of the sleeve (24).

7. A rotary mechanical shaft seal leak detector as claimed in claim 1, wherein: A second mounting hole (27) is provided through the outer ring (20) of the second bearing. A second inner ring (28) is provided inside the outer ring (20) of the second bearing. A second ball (29) is provided between the inner ring (28) of the second bearing and the outer ring (20) of the second bearing. A third bolt (31) is provided through the inner ring (28) of the second bearing. The inner end of the third bolt (31) is in contact with the sleeve rod (30). The sleeve rod (30) is provided through the inner ring of the inner ring (28) of the second bearing. A key block (35) is fixedly provided on the outer ring of the sleeve rod (30).

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