Large rotating vane type steering engine test general tool

Abstract

The utility model discloses a general tool for testing a large-scale rotating vane type steering engine, which comprises a central screw arranged along an inner hole of a rotor, an upper pressing plate and a lower pressing plate, the exposed ends of the central screw at the two ends of the inner hole of the rotor are provided with external threads, the upper pressing plate is pressed at an opening at the upper end of the steering engine and seals the opening, and the lower pressing plate is pressed at the lower end of the steering engine. The lower pressing plate upwards abuts against an opening in the lower end of the steering engine and seals the opening, the external thread ends at the two ends of the center screw rod penetrate through the upper pressing plate and the lower pressing plate respectively, the external threads at the two ends of the center screw rod are in threaded connection with pressing nuts respectively, the pressing nuts on the two sides move close to each other and clamp the upper pressing plate and the lower pressing plate, and a sealed pressing test environment is formed in the steering engine; nut sealing devices are arranged between the pressing nuts and the upper pressing plate and between the pressing nuts and the lower pressing plate. The utility model discloses a general tool for a voltage withstanding test of a large-scale porsGrunn rotating vane type steering engine. The problem that a large rotating vane type steering engine cannot be subjected to a pressure test by using an existing tool due to the fact that the steering engine is too large in appearance in the pressure test can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of marine rotary vane hydraulic steering gears, in particular to a universal tooling for testing large rotary vane steering gears. Background Art

[0002] Steering gear is a crucial component of ship steering in the shipping industry. It controls the rudder shaft to change the direction of the rudder blades, thereby controlling the ship's direction. Therefore, strict technical requirements must be met during the processing, assembly, and testing of steering gear. Due to the large size of this large porsgrunn rotary vane steering gear, the rotor bore is too large, and there is no suitable mandrel, making the production of a new mandrel too expensive.

[0003] In view of the above, it is necessary to propose a universal test fixture for large rotary vane servo to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects in the prior art and provide a universal tooling for testing large rotary vane steering gears.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a general tooling for testing large-scale rotary vane steering gears, comprising a center screw arranged along the inner hole of a rotor, the center screw having external threads at the exposed ends at both ends of the inner hole of the rotor, and an upper pressure plate and a lower pressure plate, the upper pressure plate being pressed onto the opening at the upper end of the steering gear and sealing it, the lower pressure plate being pressed upward against the opening at the lower end of the steering gear and sealing it, the external threaded ends at both ends of the center screw respectively pass through the upper pressure plate and the lower pressure plate, and a clamping nut is respectively screwed on the external threads at both ends of the center screw, the clamping nuts are respectively located on the outside of the upper pressure plate and the lower pressure plate, the clamping nuts on both sides move close to each other and clamp the upper and lower pressure plates, so that a sealed pressure test environment is formed inside the steering gear; a nut sealing device is provided between the clamping nut and the upper and lower pressure plates.

[0006] Furthermore, it also includes a piston assembly, which is detachably arranged at the opening of the upper end or lower end of the servo, so that the upper pressure plate or the lower pressure plate is attached to the outside of the piston assembly; the piston assembly is an annular hydraulic piston, the annular cylinder body of the piston assembly is installed on the opening of the servo, and the upper pressure plate or the lower pressure plate is installed at the annular telescopic rod end of the piston assembly, and sealing gaskets are provided between the upper and lower ends of the piston assembly and the servo and pressure plate.

[0007] Furthermore, a pressure interface connected to an external pressure device is provided on the upper pressure plate or the lower pressure plate, and the pressure interface is connected to a pressure injection pipeline connected to the pressure test space inside the steering gear.

[0008] Furthermore, the nut sealing device includes a deformable gasket and an extrusion gasket, both of which are annular, and the inner diameters of the deformable gasket and the extrusion gasket are matched with the diameter of the external thread;

[0009] The deformation gasket piece is provided with an annular groove on one side facing the extrusion gasket piece, and the side surface of the extrusion gasket is provided with a convex ring portion which is clamped into the annular groove and causes the annular groove to expand.

[0010] Furthermore, an annular notch is provided at the inner bottom of the annular groove, an oil filling pipe is provided in the convex ring portion, one end of the oil filling pipe is connected to the annular notch, and the other end is provided with an oil filling interface on the side away from the deformable gasket member;

[0011] The deformable gasket is provided with a plurality of hoop rings on the outside of the annular notch, and the hoop rings restrict the deformable gasket from expanding radially outward on the outside of the annular notch, and the inside of the annular notch expands inward under the action of hydraulic pressure;

[0012] The cross section of the hoop is V-shaped so that the deformable gasket has an elastic deformation margin in the axial direction.

[0013] Furthermore, the nut sealing device includes a sealing ring formed by two semicircular tiles, and the sealing ring sleeve is arranged between the center screw and the center hole of the pressure plate. The outer ring of the sealing ring forms an outer conical surface, and the inner ring of the center hole forms an inner conical surface. When the sealing ring and the pressure plate move closer to each other, the two semicircular tiles move closer to each other under the guidance of the conical surface and seal the external thread. A tile seal is provided on the inner side of the semicircular tile.

[0014] Furthermore, the two ends of the two semicircular tiles are joined together to form a stepped joint, the two ends of one tile form a protruding step on the upper side, which is the upper tile, and the two ends of the other tile form a protruding step on the lower side, which is the lower tile; the stepped joint of the two semicircular tiles forms a tortuous gap seal.

[0015] Furthermore, the inner wall of the tile seal is provided with a half-plate internal thread that is threadably matched with the external thread, and the two semicircular tiles are spliced ​​together to form an internal thread that is threadedly connected to the external thread.

[0016] Furthermore, when the two semicircular tiles are spliced ​​together, the upper end surface of the upper tile is higher than the upper end surface of the lower tile, forming a height difference. The height difference is smaller than the pitch of the center screw, so that when the tightening nut presses down the sealing ring, the upper tile is pressed down first, and the horizontal gap in the stepped gap is fit and tightened first, and fits on the upper end surface of the lower tile within a subsequent rotation of the tightening nut, forming uniform downward pressure on the two tiles.

[0017] The advantages and beneficial effects of the present invention are as follows: the present invention discloses a universal tooling for pressure testing of large-scale Porsgrunn rotary vane servos. It can solve the problem that the existing tooling cannot be used for pressure testing of large-scale Porsgrunn rotary vane servos due to the large size of the servos. When working, first install the upper pressure block, screw, nut and nut sealing ring and then install the entire unit into the servo; next, install the lower pressure plate, nut and nut sealing ring; next, tighten the upper and lower nuts and tighten them with the piston assembly to ensure that the nut sealing ring is compacted to seal; finally, install the parts used for pressure testing. The tooling is safe and reliable, has a low production cost, and can efficiently complete the pressure testing of large-scale Porsgrunn rotary vane servos, saving the high cost of core rod manufacturing. It can also be used for pressure testing of large-scale servos of other specifications in the future, and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a universal tooling for testing large-scale rotary vane steering gears in the utility model;

[0019] Figure 2 It is a three-view drawing of the medium pressure plate of the utility model;

[0020] Figure 3 This is a schematic structural diagram of the compression nut in the utility model;

[0021] Figure 4 This is a schematic structural diagram of the second embodiment of the present utility model;

[0022] Figure 5 This is an exploded view of the third embodiment of the present invention;

[0023] Figure 6 It is a longitudinal cross-sectional schematic diagram of the semicircular tile in the present invention;

[0024] In the figure: 1. Inner hole of rotor; 2. Servo; 3. Center screw; 4. External thread; 5. Upper pressure plate; 6. Lower pressure plate; 7. Pressurizing nut; 8. Nut sealing device; 9. Piston assembly; 10. Cylinder body; 11. Telescopic rod; 12. Pressurization interface; 13. Injection pressure pipeline; 14. Deformation gasket; 15. Extrusion gasket; 16. Annular groove; 17. Raised ring; 18. Annular notch; 19. Oil filling pipe; 20. Oil filling interface; 21. Hoop; 22. Semicircular tile; 23. External conical surface; 24. Internal conical surface; 25. Tile seal; 26. Stepped joint; 27. Upper tile; 28. Lower tile; 29. ​​Internal thread; 30. Step. DETAILED DESCRIPTION

[0025] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0026] Example 1:

[0027] A universal tool for testing large rotary vane steering gears, such as Figure 1 As shown, it includes a center screw 3 arranged along the rotor inner hole 1, and the center screw 3 is provided with external threads 4 at the exposed ends at both ends of the rotor inner hole 1, and also includes an upper pressure plate 5 and a lower pressure plate 6. The upper pressure plate 5 is pressed on the opening at the upper end of the steering gear 2 and seals it. Since the rotor inner hole 1 of the large rotary vane steering gear 2 is relatively large, this embodiment adopts the method of arranging the center screw 3 in the rotor inner hole 1, which can greatly reduce the cost of processing special tooling in the test. When the lower pressure plate 6 is pressed upward against the opening at the lower end of the steering gear 2 and seals it, the external threads 4 at both ends of the center screw 3 respectively pass through the upper pressure plate 5 and the lower pressure plate 6, and the external threads 4 at both ends of the center screw 3 are respectively screwed with a clamping nut 7. The schematic diagram of the clamping nut 7 is shown as follows Figure 3 As shown, when in use, the upper pressure plate 5 is used to seal the upper end of the servo 2, and similarly, the lower pressure plate 6 is used to seal the lower end. The clamping nuts 7 are respectively located on the outside of the upper and lower pressure plates 5, 6. The clamping nuts 7 on both sides move close to each other and clamp the upper and lower pressure plates 6. The clamping nuts 7 are used to apply pressure and maintain the sealing between the pressure plates and the openings. It can be understood that appropriate sealing gaskets are provided between the pressure plates and the openings to form a sealed pressure test environment inside the servo 2; a nut sealing device 8 is provided between the clamping nuts 7 and the upper and lower pressure plates 5, 6. Since it is necessary to improve the versatility of this tooling, the external threads 4 at both ends of the center screw 3 need to meet a certain length so that the pressure plates at both ends can be adjusted in the axial direction, so that it is suitable for pressure tests of different models of servos 2, and the sealing of the external threads 4 of the center screw 3 needs to be maintained in particular, otherwise leakage is very likely to occur along the thread gap.

[0028] Furthermore, it also includes a piston assembly 9, such as Figure 1As shown, the piston assembly 9 can be detachably arranged at the opening of the upper end or lower end of the servo 2, so that the upper pressure plate 5 or the lower pressure plate 6 fits on the outside of the piston assembly 9; the piston assembly 9 is an annular hydraulic piston, and the annular cylinder body 10 of the piston assembly 9 is installed on the opening of the servo 2, and the upper pressure plate 5 or the lower pressure plate 6 is installed at the end of the annular telescopic rod 11 of the piston assembly 9. Sealing gaskets are provided between the upper and lower ends of the piston assembly 9 and the servo 2 and the pressure plate. It can be understood that the clamping nuts 7 at both ends are mainly used to adjust the position of the upper and lower pressure plates 6 over a large range. In this embodiment, when the position of the pressure plates at both ends is adjusted to the appropriate range, the pressure of the pressure plate on the opening can be increased by hydraulically lifting the pressure plate on one side through the piston assembly 9, so that it can be suitable for use under high pressure. In specific implementation, such as Figure 1 As shown, a piston assembly 9 is placed on the upper opening of the servo 2, a sealing gasket is set between the base of the piston assembly 9 and the opening, and then the upper pressure plate 5 is placed on the piston assembly 9, and then the center screw 3 is inserted. At this time, the upper end of the center screw 3 has been pre-screwed with a clamping nut 7 to form an upper limit, and then the lower pressure plate 6 is installed from the lower end, and the clamping nut 7 at the lower end is tightened. After the pre-installation is completed, the upper and lower pressure plates 6 are pressed against the openings at both ends through the extension of the piston assembly 9 to form a sealed and pressurized environment.

[0029] like Figure 2 As shown, the upper or lower pressure plate 5 or 6 is provided with a pressure port 12 for connection to an external pressure test device. This port is connected to a pressure injection line 13 that leads to the pressure test space inside the steering gear 2. The external pressure test line is connected to the pressure port 12. A pressure medium is injected into the steering gear 2 through the pressure injection line 13, and parameters such as the pressure drop and duration are observed to determine whether the sealing effect of the steering gear 2 meets the requirements.

[0030] Example 2:

[0031] Furthermore, the nut sealing device 8 includes a deformation gasket 14 and an extrusion gasket 15, such as Figure 4 As shown, the deformable gasket member 14 and the extrusion gasket member 15 are both annular sheets, and the inner diameters of the deformable gasket and the extrusion gasket are matched with the diameter of the external thread 4; since the sealing between the external thread 4 and the center hole of the pressure plate is more critical and is the difficulty of sealing, in this embodiment, the irregularly shaped external thread 4 and the center hole use a deformable gasket member 14 and an extrusion gasket member 15. In this embodiment, the extrusion gasket member 15 is a fixed shape and can be made of materials such as stainless steel, while the deformable gasket member 14 is a gasket structure that can undergo a certain directional deformation. Specifically, as shown in FIG. Figure 4As shown, the deformable gasket member 14 is provided with an annular groove 16 on the side facing the extrusion gasket member 15. The inward roll of the annular groove 16 forms an inwardly deflected lip. The side of the extrusion gasket is provided with a protruding ring portion 17 that engages with the annular groove 16 and causes the annular groove 16 to expand. When the extrusion gasket member 15 moves downward and the protruding ring portion 17 is inserted into the annular groove 16, because the outer roll of the protruding ring portion 17 and the annular groove 16 is a vertical annular surface and the inner circle is an inclined annular surface, when the extrusion gasket moves downward, the protruding ring portion 17 is inserted into the annular groove 16, causing the inner circle of the annular groove 16 to be squeezed inward and bulged. The bulged portion engages with the external thread 4 to form a seal against the external thread 4.

[0032] Furthermore, an annular notch 18 is provided at the inner bottom of the annular groove 16, and an oil filling pipe 19 is provided in the convex ring portion 17. One end of the oil filling pipe 19 is connected to the annular notch, and the other end is provided with an oil filling interface 20 on the side away from the deformation gasket member 14; as an improvement, in order to increase the deformation amount of the inner side of the annular groove 16, hydraulic oil is injected into the annular notch 18 and the annular groove 16 through the oil filling pipe 19 from the oil filling interface 20. The additional expansion caused by the injection of hydraulic oil can make the inner side of the annular groove 16 obtain a larger deformation amount, thereby having a better sealing effect on the external thread 4.

[0033] In order to make the expansion occur more in the inner ring of the annular groove 16, a plurality of hoop rings 21 are provided on the outer side of the annular notch 18 of the deformable gasket 14. The hoop rings 21 limit the deformation gasket 14 from expanding radially outward on the outer side of the annular notch 18, and the inner side of the annular notch 18 expands inward under the action of hydraulic pressure; thus, the inner side can be expanded inward to seal during injection molding. Figure 4 As shown, the cross-section of the hoop 21 is V-shaped so that the deformed gasket member 14 has an elastic deformation margin in the axial direction. The V-shaped hoop 21 can be compressed and thinned under the pressure of the extrusion gasket member 15, and it has a certain elasticity. After the tightening nut 7 is loosened, the hoop 21 can be deformed to restore the thickness.

[0034] Example 3:

[0035] As another example, Figure 5As shown, the nut sealing device 8 includes a sealing ring formed by two semicircular tiles 22, and the sealing ring sleeve is arranged between the center screw 3 and the center hole of the pressure plate. The outer ring of the sealing ring forms an outer conical surface 23, and the inner ring of the center hole forms an inner conical surface 24. It can be understood that the outer conical surface 23 and the inner conical surface 24 can form a seal during the process of fitting and pressing. In order to maintain the sealing effect, the surface of the outer conical surface 23 can be processed and made of a metal that can produce a certain deformation under pressure, such as soft metals such as aluminum and copper. The two conical surfaces are sealed during the extrusion process, which is equivalent to setting a sealing gasket; and the sealing form between the semicircular tile 22 and the external thread 4 is emphasized.

[0036] Specifically, when the sealing ring and the pressure plate move toward each other, the two semicircular tiles 22 are guided by the conical surface to move toward each other and seal against the external thread 4. A tile seal 25 is provided on the inner side of the semicircular tile 22. The tile seal 25 in this embodiment can be formed into an internal thread 29 that matches the external thread 4, thereby completely filling the gap in the external thread 4 and achieving a better sealing effect. That is, the inner wall of the tile seal 25 is provided with a semi-plate-shaped internal thread 29 that threadably matches the external thread 4. When the two semicircular tiles 22 are assembled, they form an internal thread 29 that is screwed to the external thread 4.

[0037] But if Figure 5 As shown, when the ends of the two semicircular tiles 22 are joined, an axial gap is formed, and leakage is likely to occur along the axial gap when the pressure is high. As an improvement, the two ends of the two semicircular tiles 22 are joined to form a stepped 30-shaped joint 26, as shown in FIG. Figure 6 As shown, the two ends of one tile form a protruding step 30 on the upper side, which is the upper tile 27, and the two ends of the other tile form a protruding step 30 on the lower side, which is the lower tile 28; the step 30-shaped joint 26 of the two semicircular tiles 22 forms a tortuous gap seal.

[0038] Furthermore, when the two semicircular tiles 22 are assembled, the upper end surface of the upper tile 27 is higher than the upper end surface of the lower tile 28, forming a height difference. The height difference is smaller than the pitch of the center screw 3, so that when the tightening nut 7 presses down the sealing ring, the upper tile 27 is pressed down first, and the horizontal gap in the step 30-shaped gap is first fitted and tightened, and fits on the upper end surface of the lower tile 28 within a subsequent rotation of the tightening nut 7, forming a uniform downward pressure on the two tiles. Since the ends of the two semicircular tiles 22 are spliced ​​in a step-like 30 shape, the steps 30 at both ends are meshed when tightened, so the original axial gap is changed into a step-like 30 gap composed of a horizontal gap and multiple axial gaps, thereby improving the sealing effect, and a height difference is added to the upper end of the upper tile 27. After splicing and during the tightening process by the clamping nut 7, the upper tile 27 with the height difference first contacts the clamping nut 7, so that the upper tile 27 moves down first, so that the horizontal gap is squeezed closed first. Since the height difference is smaller than the nut of the external thread 4, whether the clamping nut 7 is used for screw pressing or the piston assembly 9 is used for tightening, the upper end faces of the two semicircular tiles 22 can be pressed against the clamping nut 7, thereby applying uniform pressure to the two semicircular tiles 22 to ensure the sealing effect at the external thread 4.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A universal tool for testing large rotary vane steering gear, characterized in that: The invention comprises a central screw (3) arranged along the inner hole of the rotor (1), wherein the exposed ends of the central screw (3) at both ends of the inner hole of the rotor (1) are provided with external threads (4), and further comprises an upper pressure plate (5) and a lower pressure plate (6), wherein the upper pressure plate (5) is pressed on the opening at the upper end of the steering gear (2) and seals it, and the lower pressure plate (6) is pressed upward against the opening at the lower end of the steering gear (2) and seals it, and the external threads (4) at both ends of the central screw (3) pass through the upper pressure plate (5) and the lower pressure plate (6) respectively, and the external threads (4) at both ends of the central screw (3) are respectively screwed with a clamping nut (7), and the clamping nut (7) is respectively located on the outer side of the upper pressure plate (5) and the lower pressure plate (6), and the clamping nuts (7) on both sides move close to each other and clamp the upper and lower pressure plates (6), so that a sealed pressure test environment is formed inside the steering gear (2); and a nut sealing device (8) is provided between the clamping nut (7) and the upper pressure plate (5) and the lower pressure plate (6).

2. A universal tool for testing large rotary vane steering gear according to claim 1, characterized in that: The invention also includes a piston assembly (9), which is detachably arranged at the opening of the upper end or the lower end of the steering gear (2), so that the upper pressure plate (5) or the lower pressure plate (6) is attached to the outer side of the piston assembly (9); the piston assembly (9) is an annular hydraulic piston, the annular cylinder body (10) of the piston assembly (9) is installed on the opening of the steering gear (2), the upper pressure plate (5) or the lower pressure plate (6) is installed at the end of the annular telescopic rod (11) of the piston assembly (9), and sealing gaskets are provided between the upper and lower ends of the piston assembly (9) and the steering gear (2) and the pressure plate.

3. The universal tooling for testing large rotary vane steering gear according to claim 2, characterized in that: The upper pressure plate (5) or the lower pressure plate (6) is provided with a pressure interface (12) connected to an external pressure device, and the pressure interface (12) is connected to a pressure injection pipeline (13) connected to the pressure test space inside the steering gear (2).

4. A universal tool for testing large rotary vane steering gear according to claim 1 or 2, characterized in that: The nut sealing device (8) comprises a deformable gasket (14) and an extrusion gasket (15), wherein the deformable gasket (14) and the extrusion gasket (15) are both annular, and the inner diameters of the deformable gasket and the extrusion gasket are matched with the diameter of the external thread (4); The deformable gasket piece (14) is provided with an annular groove (16) on the side facing the extrusion gasket piece (15), and the side surface of the extrusion gasket is provided with a convex ring portion (17) that is engaged with the annular groove (16) and causes the annular groove (16) to expand.

5. The universal tooling for testing large rotary vane steering gear according to claim 4, characterized in that: An annular notch (18) is provided at the inner bottom of the annular groove (16), an oil filling pipe (19) is provided in the convex ring portion (17), one end of the oil filling pipe (19) is connected to the annular notch, and the other end is provided with an oil filling interface (20) on the side away from the deformation gasket (14); The deformable gasket (14) is provided with a plurality of hoop rings (21) on the outside of the annular notch (18), and the hoop rings (21) restrict the deformable gasket (14) from expanding radially outward on the outside of the annular notch (18), and the inside of the annular notch (18) expands inward under the action of hydraulic pressure; The cross section of the hoop (21) is V-shaped so that the deformable gasket (14) has an elastic deformation margin in the axial direction.

6. A universal tool for testing large rotary vane steering gear according to claim 1 or 2, characterized in that: The nut sealing device (8) includes a sealing ring formed by splicing two semicircular tiles (22), and the sealing ring sleeve is arranged between the central screw (3) and the central hole of the pressure plate. The outer ring of the sealing ring forms an outer conical surface (23), and the inner ring of the central hole forms an inner conical surface (24). When the sealing ring and the pressure plate move closer to each other, the two semicircular tiles (22) move closer to each other under the guidance of the conical surface and seal the external thread (4). The inner side of the semicircular tile (22) is provided with a tile seal (25).

7. The universal tooling for testing large rotary vane steering gear according to claim 6, characterized in that: The two ends of the two semicircular tiles (22) are joined together to form a step (30)-shaped joint opening (26); the two ends of one tile form a protruding step (30) on the upper side, which is an upper tile (27); the two ends of the other tile form a protruding step (30) on the lower side, which is a lower tile (28); the step (30)-shaped joint opening (26) of the two semicircular tiles (22) forms a tortuous gap seal.

8. The universal tooling for testing large rotary vane steering gear according to claim 7, characterized in that: The inner wall of the tile seal (25) is provided with a semi-plate-shaped internal thread (29) threadably matched with the external thread (4); the two semicircular tiles (22) are assembled to form the internal thread (29) threadedly connected with the external thread (4).

9. The universal tooling for testing large rotary vane steering gear according to claim 8, characterized in that: When the two semicircular tiles (22) are assembled, the upper end surface of the upper tile (27) is higher than the upper end surface of the lower tile (28), forming a height difference. The height difference is smaller than the pitch of the center screw (3), so that when the clamping nut (7) presses down the sealing ring, the upper tile (27) is pressed down first, and the horizontal gap in the step (30)-shaped gap is first fitted and pressed, and fits on the upper end surface of the lower tile (28) within a subsequent rotation of the clamping nut (7), forming a uniform downward pressure on the two tiles.

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