Motor air tightness detection device

Abstract

The present invention relates to the field of motor detection technology, and specifically to a motor airtightness detection device for sealing and clamping a motor, comprising a cavity shell assembly, a movable end cover, an end sealing assembly, and a circumferential sealing assembly; the cavity shell assembly comprises a cavity shell base, a downward pressure channel, and an upward pressure channel; the movable end cover is slidably arranged above the cavity shell assembly, and the movable end cover comprises an end cover ring body, a lower circular tube, a stop ring, an active pressure rod, etc.; the end sealing assembly is used to seal the lower end of the motor, and the circumferential sealing assembly is used to seal the circumferential outer wall of the motor. The airtightness detection device described in this case is used to detect the sealing of the motor, and this case is particularly suitable for motors with a smooth lower end face and a smooth circumferential side face; the airtightness detection device described in this case can simultaneously seal the end and circumference of the motor.

Description

Technical Field

[0001] The present application relates to the technical field of motor detection, and in particular to a motor air tightness detection device. Background Art

[0002] Motor sealing is an important part of motor design and manufacturing. Its main purpose is to prevent liquids, gases and impurities from entering the interior of the motor, and to prevent lubricants, coolants, etc. inside the motor from leaking into the external environment. The airtightness test chamber at the motor shaft extension is an important part of the motor seal test. The test device includes at least a fixture for installing, fixing and sealing the motor, and passing positive pressure into the fixture to test the motor shaft extension seal. However, the process of installing the motor with the test device in the prior art is complicated, and the sealing between the motor and the fixture of the test device is difficult to ensure, resulting in air leakage that affects the motor test. Summary of the Invention

[0003] A motor air tightness detection device is used to seal and clamp the motor, comprising a cavity shell assembly, a movable end cover, an end seal assembly, and a circumferential seal assembly;

[0004] The cavity shell assembly includes a cavity shell base, a downward pressure channel, and an upward channel. The cavity shell base includes a circular cylinder, an upper opening provided at the upper end of the circular cylinder, a lower through hole provided below the upper opening, a sealed circular cavity provided outside the lower through hole, an annular convex edge provided on the lower end surface of the sealed circular cavity at the outer edge of the lower through hole, a circumferential sealing ring provided around the annular convex edge, an inner convex ring provided on the inner wall of the lower through hole, a downward pressure sealing ring provided above the inner convex ring, and an annular groove provided on the outer wall of the circular cylinder; There are three downward pressure channels, and the downward pressure channels are circumferentially evenly distributed above the annular groove; there are three upward channels, and the upward channels are circumferentially evenly distributed above the sealing circular cavity. The upward channels and the downward pressure channels are staggered, and the upward channels include a driven longitudinal hole connected to the sealing circular cavity, a connecting transverse hole provided on the right side of the driven longitudinal hole, an active longitudinal hole provided on the right side of the connecting transverse hole, a guide transverse rod provided on the right side of the active longitudinal hole and passing through the connecting transverse hole, and a limiting transverse rod provided above the inner wall of the active longitudinal hole;

[0005] The movable end cover is slidably arranged above the cavity shell assembly, and the movable end cover comprises an end cover ring body, a lower circular tube arranged at the inner edge of the lower end surface of the end cover ring body, a stop ring arranged below the outer edge of the lower circular tube, and an active pressure rod uniformly distributed circumferentially on the lower end surface of the end cover ring body, the active pressure rod corresponds to the active longitudinal hole one by one and is plugged into and matched with the active pressure rod, the active pressure rod is provided with a limiting through hole plugged into and matched with the limiting cross bar, the lower end of the active pressure rod is provided with an upper inclined surface gradually inclined upward from the outside to the inside, the lower end of the active pressure rod is also provided with an accommodating opening for accommodating the guide cross bar, the inner wall of the end cover ring body is provided with a plug ear with a hole, and the plug ear with a hole is rotatably provided with an arc baffle;

[0006] The end sealing assembly is used to seal the lower end of the motor. The end sealing assembly includes an external threaded ring rotatably arranged in the annular groove, an internal threaded tube screwed on the external threaded ring, a driven gear arranged on the outer wall of the internal threaded tube, a driving motor arranged on the side of the circular cylinder, and a driving gear driven by the output shaft of the driving motor and meshing with the driven gear. The upper end surface of the external threaded ring is circumferentially distributed with downward pressure rods that are plugged into and matched with the downward pressure channels one by one. The upper end of the downward pressure rod is provided with a rod clamp that is clamped above the stop ring.

[0007] The circumferential sealing assembly is used to seal the circumferential outer wall of the motor. The circumferential sealing assembly includes a sliding push ring slidably arranged in the sealing circular cavity, an inverted conical surface with a wider upper part and a narrower lower part arranged on the upper inner edge of the sliding push ring, a driven plug rod uniformly distributed circumferentially on the upper end surface of the sliding push ring and plugged into the driven longitudinal hole one by one, a driven horizontal hole arranged in the driven plug rod, and a lower inclined surface arranged on the upper end surface of the driven horizontal hole and gradually inclined downward from the outside to the inside. A transmission slider is slidably provided on the guide cross bar, a right inclined surface is provided on the right side of the transmission slider to cooperate with the upper inclined surface, and a left inclined surface is provided on the left side of the transmission slider to cooperate with the lower inclined surface. The circumferential sealing assembly also includes a reset compression spring arranged at the upper end of the driven longitudinal hole and above the driven plug rod.

[0008] Further:

[0009] The inner wall of the end cover ring is provided with a baffle slot which is plugged into and matched with the distal end of the arc-shaped baffle.

[0010] Further:

[0011] The inner edge of the lower end surface of the circumferential sealing ring is provided with a sealing ring inner ring for accommodating an annular convex edge.

[0012] Further:

[0013] The outer periphery of the circumferential sealing ring is provided with an inverted conical surface which matches the inverted conical surface.

[0014] Beneficial effects:

[0015] The air tightness detection device described in this case is used to detect the sealing of a motor. This case is particularly suitable for motors with a smooth lower end surface and a smooth circumferential side surface.

[0016] The airtightness detection device described in this case can simultaneously seal the ends and circumference of the motor:

[0017] The end seal assembly squeezes the seal ring to seal the lower end face of the motor, i.e., the shaft end face;

[0018] The circumferential seal assembly squeezes the circumferential seal ring to achieve sealing of the circumferential side of the motor.

[0019] The air tightness detection device described in this case is simple to operate. A driving motor can drive the movable end cover to move longitudinally and simultaneously drive the end sealing assembly and the circumferential sealing assembly to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of an embodiment of the motor air tightness detection device.

[0022] Figure 2 It is a schematic diagram of another embodiment of the motor air tightness detection device.

[0023] Figure 3 It is a front view of an embodiment of the motor air tightness detection device.

[0024] Figure 4 is a schematic diagram of an embodiment of the motor.

[0025] Figure 5 It is a cross-sectional view of an embodiment of the motor air tightness detection device.

[0026] Figure 6 It is a schematic diagram of an embodiment of the movable end cover.

[0027] Figure 7 It is a front view of an embodiment of the movable end cover.

[0028] Figure 8 It is a cross-sectional view of an embodiment of the cavity shell assembly.

[0029] Figure 9 It is a cross-sectional view of an embodiment of the motor air tightness detection device.

[0030] In the picture:

[0031] 9. Motor;

[0032] 1. Cavity shell assembly;

[0033] 11. Cavity shell base, 111. Circular cylinder, 112. Upper opening, 113. Lower through hole, 114. Sealed circular cavity, 115. Annular ridge, 116. Circumferential sealing ring, 117. Internal convex ring, 118. Lower pressure sealing ring, 119. Annular groove;

[0034] 12. Downward pressure channel;

[0035] 13. Upward channel, 131. Driven longitudinal hole, 132. Connecting transverse hole, 133. Active longitudinal hole, 134. Guide crossbar, 135. Limit crossbar;

[0036] 2. Movable end cover, 21. End cover ring, 22. Lower circular tube, 23. Stop ring, 24. Active pressure rod, 25. Limiting through hole, 26. Upper inclined surface, 27. Accommodating opening, 28. Hole-shaped plug ear, 29. Arc baffle;

[0037] 3. End seal assembly, 31. Externally threaded ring, 32. Internally threaded tube, 33. Driven gear, 34. Drive motor, 35. Active gear, 36. Down-holding rod, 37. Rod clamp;

[0038] 4. Circumferential seal assembly, 41. Sliding push ring, 42. Inverted conical surface, 43. Driven plug rod, 44. Driven horizontal hole, 45. Lower inclined surface, 46. Transmission slider, 47. Right inclined surface, 48. Left inclined surface, 49. Reset compression spring. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0040] A motor air tightness detection device for sealing and clamping a motor 9, comprising a cavity housing assembly 1, a movable end cover 2, an end sealing assembly 3, and a circumferential sealing assembly 4;

[0041] The chamber shell assembly 1 includes a chamber shell base 11, a down-pressure channel 12, and an up-flow channel 13. The chamber shell base 11 includes a circular cylinder 111, an upper opening 112 provided at the upper end of the circular cylinder 111, a lower through hole 113 provided below the upper opening 112, a sealed circular cavity 114 provided outside the lower through hole 113, an annular convex edge 115 provided on the lower end surface of the sealed circular cavity 114 at the outer edge of the lower through hole 113, a circumferential sealing ring 116 provided around the annular convex edge 115, a built-in convex ring 117 provided on the inner wall of the lower through hole 113, a down-pressure sealing ring 118 provided above the built-in convex ring 117, and an annular groove 116 provided on the outer wall of the circular cylinder 111. 19; There are three downward pressure channels 12, and the downward pressure channels 12 are circumferentially evenly distributed above the annular groove 119; There are three upward channels 13, and the upward channels 13 are circumferentially evenly distributed above the sealed circular cavity 114. The upward channels 13 and the downward pressure channels 12 are staggered, and the upward channels 13 include a driven vertical hole 131 connected to the sealed circular cavity 114, a connecting horizontal hole 132 provided on the right side of the driven vertical hole 131, an active vertical hole 133 provided on the right side of the connecting horizontal hole 132, a guide cross bar 134 provided on the right side of the active vertical hole 133 and passing through the connecting cross hole 132, and a limiting cross bar 135 provided above the inner wall of the active vertical hole 133;

[0042] The movable end cover 2 is slidably arranged above the cavity shell assembly 1, and the movable end cover 2 includes an end cover ring body 21, a lower circular tube 22 arranged at the inner edge of the lower end surface of the end cover ring body 21, a stop ring 23 arranged below the outer edge of the lower circular tube 22, and an active pressure rod 24 uniformly distributed circumferentially on the lower end surface of the end cover ring body 21, the active pressure rod 24 corresponds to the active longitudinal hole 133 one by one and is plugged into and matched with the active pressure rod 24, and a limiting through hole 25 is provided on the active pressure rod 24 to be plugged into and matched with the limiting cross bar 135, and an upper inclined surface 26 gradually tilted upward from the outside to the inside is provided at the lower end of the active pressure rod 24, and an accommodating opening 27 for accommodating the guide cross bar 134 is further provided at the lower end of the active pressure rod 24, and an inner wall of the end cover ring body 21 is provided with a plug ear 28 with a hole, and an arc-shaped baffle 29 is rotatably provided on the plug ear 28 with a hole;

[0043] The end sealing assembly 3 is used to seal the lower end of the motor 9. The end sealing assembly 3 includes an externally threaded ring 31 rotatably provided in the annular groove 119, an internally threaded tube 32 screwed on the externally threaded ring 31, a driven gear 33 provided on the outer wall of the internally threaded tube 32, a driving motor 34 provided on the side of the circular cylinder 111, and a driving gear 35 driven by the output shaft of the driving motor 34 and meshing with the driven gear 33. The upper end surface of the externally threaded ring 31 is circumferentially evenly distributed with downward pressure rods 36 that are plugged into and matched with the downward pressure channels 12. The upper end of the downward pressure rod 36 is provided with a rod clamp 37 that is clamped above the stop ring 23.

[0044] The circumferential sealing assembly 4 is used to seal the circumferential outer wall of the motor 9. The circumferential sealing assembly 4 includes a sliding push ring 41 slidably arranged in the sealing circular cavity 114, an inverted conical surface 42 with a wider upper part and a narrower lower part arranged along the upper part of the sliding push ring 41, driven plug rods 43 uniformly distributed circumferentially on the upper end surface of the sliding push ring 41 and plugged into the driven longitudinal holes 131 one by one, driven transverse holes 44 arranged in the driven plug rods 43, and a lower inclined surface 45 arranged on the upper end surface of the driven transverse holes 44 and gradually inclined downward from the outside to the inside. A transmission slider 46 is slidably provided on the guide cross bar 134, and a right inclined surface 47 is provided on the right side of the transmission slider 46 to cooperate with the upper inclined surface 26, and a left inclined surface 48 is provided on the left side of the transmission slider 46 to cooperate with the lower inclined surface 45. The circumferential sealing assembly 4 also includes a reset compression spring 49 arranged at the upper end of the driven longitudinal hole 131 and above the driven plug rod 43.

[0045] Further:

[0046] The inner wall of the end cover ring body 21 is provided with a baffle slot that is plugged into and matched with the distal end of the arc-shaped baffle 29.

[0047] Further:

[0048] The inner edge of the lower end surface of the circumferential sealing ring 116 is provided with a sealing ring inner ring for accommodating the annular convex edge 115 .

[0049] Further:

[0050] The outer periphery of the circumferential sealing ring 116 is provided with an inverted conical surface that matches the inverted conical surface 42 .

[0051] The specific method is as follows:

[0052] Step 1, insert motor 9:

[0053] Insert the motor 9 into the end cover ring 21, the upper opening 112, the lower through hole 113, and the sealed circular cavity 114, and the motor shaft of the motor 9 is passed through the built-in convex ring 117;

[0054] As the instruction manual Figure 2 、 6 As shown:

[0055] Rotate the arc-shaped baffle 29 to flip it over and stop it above the motor 9;

[0056] Step 2, end face sealing:

[0057] The driving motor 34 rotates to drive the driving gear 35 to rotate;

[0058] The driving gear 35 rotates to drive the driven gear 33 and the internal threaded tube 32 to rotate, and the internal threaded tube 32 rotates to pull the external threaded ring 31, the downward pressing rod 36, and the rod clamp 37 downward;

[0059] As the instruction manual Figure 9 As shown:

[0060] The pull rod clamp 37 acts on the stop ring 23 to drive the movable end cover 2 downward as a whole, and the arc baffle 29 drives the motor 9 downward;

[0061] The lower end face of the motor 9 squeezes the lower pressure seal ring 118 to achieve end face sealing;

[0062] Step 3, circumferential sealing:

[0063] The upper inclined surface 26 moves downward and presses the right inclined surface 47 to move the transmission slider 46 to the left along the guide cross bar 134;

[0064] The left-mounted inclined surface 48 acts on the lower-mounted inclined surface 45 to drive the driven rod 43, the sliding push ring 41, and the inverted conical surface 42 upward;

[0065] The inverted conical surface 42 squeezes the circumferential sealing ring 116 to achieve circumferential sealing of the motor 9 .

[0066] It should be noted that the portion of the motor 9 in this case where the end face close to the output shaft contacts the down-pressure sealing ring 118 is formed into a plane, and the outer periphery of the lower half of the motor 9 is formed into a smooth cylindrical shape.

[0067] It should be noted that the lower end of the lower through hole 113 is sealed and connected to a positive pressure gas source, and the gas enters the shaft extension at the lower end of the motor 9 through the lower through hole 113 and the built-in convex ring 117. Due to the double sealing of the lower pressure sealing ring 118 and the circumferential sealing ring 116, the gas will not leak from between the motor 9 and the detection device, and the air pressure in the lower through hole 113 is kept stable; when the air pressure in the lower through hole 113 decreases, it indicates that there is a gas leak at the shaft extension of the motor 9.

Claims

1. A motor airtightness detection device for sealing and clamping a motor (9), characterized in that: The chamber shell assembly (1) includes a chamber shell base (11), a downward pressure channel (12), and an upward pressure channel (13); A movable end cover (2) slidably disposed above the cavity shell assembly (1); An end seal assembly (3) for sealing the lower end of the motor (9); A circumferential seal assembly (4) for sealing the circumferential outer wall of the motor (9); The chamber shell base (11) includes a circular cylinder (111), an upper opening (112) provided at the upper end of the circular cylinder (111), a lower through hole (113) provided below the upper opening (112), a sealing circular cavity (114) provided outside the lower through hole (113), an annular convex edge (115) provided on the lower end surface of the sealing circular cavity (114) at the outer edge of the lower through hole (113), a circumferential sealing ring (116) provided around the annular convex edge (115), an inner convex ring (117) provided on the inner wall of the lower through hole (113), a downward pressure sealing ring (118) provided above the inner convex ring (117), and an annular groove (119) provided on the outer wall of the circular cylinder (111); There are three downward pressure channels (12), and the downward pressure channels (12) are evenly distributed circumferentially above the annular groove (119); There are three upward channels (13), and the upward channels (13) are uniformly distributed circumferentially above the sealing circular cavity (114). The upward channels (13) and the downward pressure channels (12) are staggered. The upward channels (13) include a driven longitudinal hole (131) connected to the sealing circular cavity (114), a connecting transverse hole (132) provided on the right side of the driven longitudinal hole (131), an active longitudinal hole (133) provided on the right side of the connecting transverse hole (132), a guide transverse rod (134) provided on the right side of the active longitudinal hole (133) and passing through the connecting transverse hole (132), and a limiting transverse rod (135) provided above the inner wall of the active longitudinal hole (133).

2. The motor air tightness detection device according to claim 1, characterized in that: The movable end cover (2) comprises an end cover ring body (21), a lower circular tube (22) provided on the inner edge of the lower end surface of the end cover ring body (21), a stop ring (23) provided below the outer edge of the lower circular tube (22), and active pressure rods (24) uniformly distributed circumferentially on the lower end surface of the end cover ring body (21), the active pressure rods (24) corresponding to the active longitudinal holes (133) one by one and plugged in, the active pressure rods (24) are provided with a limiting through hole (25) plugged in with the limiting cross bar (135), the lower end of the active pressure rod (24) is provided with an upper inclined surface (26) gradually tilted upward from the outside to the inside, the lower end of the active pressure rod (24) is also provided with an accommodating opening (27) for accommodating the guide cross bar (134), the inner wall of the end cover ring body (21) is provided with a holed plug ear (28), and the holed plug ear (28) is rotatably provided with an arc-shaped baffle (29); The end sealing assembly (3) includes an external threaded ring (31) rotatably arranged in the annular groove (119), an internal threaded tube (32) screwed on the external threaded ring (31), a driven gear (33) arranged on the outer wall of the internal threaded tube (32), a driving motor (34) arranged on the side of the circular cylinder (111), and a driving gear (35) driven by the output shaft of the driving motor (34) and meshed with the driven gear (33). The upper end surface of the external threaded ring (31) is uniformly distributed with downward pressure rods (36) that are plug-fitted into the downward pressure channel (12) one by one. The upper end of the downward pressure rod (36) is provided with a rod clamp (37) that is clamped above the stop ring (23).

3. The motor air tightness detection device according to claim 2, characterized in that: The circumferential seal assembly (4) comprises a sliding push ring (41) slidably disposed in the sealing circular cavity (114), an inverted conical surface (42) disposed on the upper edge of the sliding push ring (41) and having a wider upper portion and a narrower lower portion, driven plug rods (43) uniformly distributed on the upper end surface of the sliding push ring (41) and plugged into the driven longitudinal holes (131) one by one, driven transverse holes (44) disposed in the driven plug rods (43), and a driven transverse hole (44) disposed on the upper end surface of the driven transverse hole (44) gradually extending from the outside to the inside. A lower inclined surface (45) is tilted downward, a transmission slider (46) is slidably provided on the guide cross bar (134), a right inclined surface (47) is provided on the right side of the transmission slider (46) to cooperate with the upper inclined surface (26), and a left inclined surface (48) is provided on the left side of the transmission slider (46) to cooperate with the lower inclined surface (45), and the circumferential seal assembly (4) further includes a return compression spring (49) provided at the upper end of the driven longitudinal hole (131) and located above the driven plug rod (43).

4. The motor air tightness detection device according to claim 3, characterized in that: The inner wall of the end cover ring body (21) is provided with a baffle slot that is plugged into and matched with the distal end of the arc-shaped baffle (29).

5. The motor air tightness detection device according to claim 4, characterized in that: The inner edge of the lower end surface of the circumferential sealing ring (116) is provided with a sealing ring inner ring for accommodating the annular convex edge (115).

6. The motor air tightness detection device according to claim 5, characterized in that: The outer periphery of the circumferential sealing ring (116) is provided with an inverted conical surface that matches the inverted conical surface (42).

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