Hydraulic dynamic balance catcher

Abstract

The utility model discloses a hydraulic dynamic balance catcher and an assembling structure thereof, which relate to the technical field of hydraulic catchers, and comprise a hydraulic dynamic balance catcher which comprises a shaft head, a hydraulic part and an external connecting part, the shaft head is sleeved with the hydraulic part, and the hydraulic part is in interference fit with the shaft head; one or more hydraulic through holes which penetrate through the axis and are perpendicular to the axis are formed in the end, inserted into the hydraulic part, of the shaft head. A plurality of thread grooves which are uniformly distributed at equal distances from the axis are formed in the side wall, close to the tip of the shaft head, of the hydraulic part; the external connecting piece is provided with threaded through holes and inner hexagonal screw holes corresponding to the threaded grooves, the threaded through holes and the inner hexagonal screw holes are formed alternately, and the external connecting piece is connected with the hydraulic piece through harness cords and inner hexagonal bolts. And the damage effect caused by rubbing and grinding of the baking receiving hand is avoided, the production efficiency is improved, and the waste of materials is also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic joints, and more specifically, to a hydraulic dynamic balancing joint. Background Art

[0002] A dynamic balancing joint is a mechanical transmission device used to connect the dynamic balancing machine and the turbine rotor so that they rotate together, thereby transmitting torque and motion. In the past, dynamic balancing tests for turbine and compressor rotors generally used snap-on joints and baking-in joints.

[0003] However, in the actual working process, for the joint type joint, it is necessary to make more joints according to the rotor shaft end pitch and the size of the screw hole, and because the screw hole positions are different, the rotors of the same specifications require a variety of tooling joints, which results in serious waste of materials. In addition, for some special rotors, the screw hole and the shaft head O-groove are close to each other, resulting in the screw hole and the sealing groove being connected during the machining process, causing the shaft head to be repaired (Note: the hydraulic coupling cannot be installed after the connection). In addition, the number of joint type joints manufactured for a long time is large, and the types are complicated, which results in serious waste of materials. Due to the close distance between the screw hole and the shaft head O-groove ( Figure 1 The distance between the two parts (enlarged view of part I in the middle) is too close, which causes the screw hole and the groove to penetrate during the machining process, resulting in machining defects on the shaft head.

[0004] In addition, for some special rotor shaft heads that do not have screw holes, the only option is to calculate the interference fit and bake the adapter. After the baked-in adapter is heated and expanded and assembled on the rotor, the straight mouth that matches the dynamic balancing machine needs to be reprocessed. This method not only reduces production efficiency, but also makes it easy for the shaft head to be bumped or scratched when using the baked-in adapter. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a hydraulic dynamic balancing joint.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydraulic dynamic balancing joint, comprising a shaft head, a hydraulic component and an external component; the hydraulic component is sleeved on the shaft head, and the hydraulic component is interference fit with the shaft head; the shaft head is inserted into the hydraulic component and one end is provided with a hydraulic through hole that passes through the axis and is perpendicular to the axis, and there are one or more hydraulic through holes; the hydraulic component is provided with a plurality of threaded grooves uniformly distributed at equal distances from the axis on the side wall near the tip of the shaft head; the external component is provided with threaded through holes and hexagonal screw holes corresponding to the threaded grooves, and the threaded through holes and hexagonal screw holes are alternately provided, and the external component is connected to the hydraulic component by a through thread and a hexagonal screw bolt.

[0007] As a further preferred embodiment of the present invention, the assembly structure that cooperates with the hydraulic dynamic balancing joint includes a drawing washer, an external press-in part, an internal press-in part, a coupling pressure joint, a plug, a high-pressure oil circuit, and a low-pressure oil circuit; the internal press-in part abuts the tip of the shaft head; the external press-in part is sleeved on the outside of the internal press-in part, and the external press-in part abuts against the hydraulic part through the drawing washer; the coupling pressure joint passes through the internal press-in part and is connected to the hydraulic through hole inside the shaft head, and its other end is connected to the high-pressure oil circuit; the external press-in part is provided with a groove on the side away from the shaft head, and the internal press-in part expands outward away from the shaft head side and is slidably connected to the groove, and its sliding gap forms a cavity, and the cavity is connected to the low-pressure oil circuit; the plug is installed on the internal press-in part to seal the cavity.

[0008] As a further preference of the present invention, the evenly distributed thread grooves are spaced at an angle of 30°, and the threaded through holes and hexagonal screw holes are alternately distributed at a corresponding angle of 30°, which is used for standardized settings, facilitates standardized assembly, and reduces processing difficulty.

[0009] As a further preferred embodiment of the present invention, the inner side wall of the outer press-in part close to the tip of the shaft head is grooved, and an outer pressure part O-ring is provided in the groove, and the outer pressure part O-ring abuts against the inner pressure part, and the outer pressure part O-ring abuts against the outer pressure part back ring close to the shaft head; the outer side wall of the inner press-in part away from the tip of the shaft head is grooved, and an inner pressure part O-ring is provided in the groove, and the inner pressure part O-ring abuts against the outer press-in part, and the inner pressure part O-ring abuts against the inner pressure part back ring away from the shaft head, thereby improving the sealing of the device. At the same time, the provision of the back ring prevents the O-ring from deforming under pressure.

[0010] As a further preferred embodiment of the present invention, the hydraulic component is grooved near the inner side wall away from the tip of the shaft head, an O-ring for a hole is provided in the groove, and the O-ring for the hole is abutted against a back ring on the side away from the tip of the shaft head; the shaft head is grooved on the side wall close to the tip, an O-ring for a shaft is provided in the groove, and the O-ring for the shaft is abutted against a back ring on the side close to the shaft tip to improve the sealing performance of the device, and at the same time, the provision of the back ring prevents the O-ring from deforming under pressure.

[0011] As a further preferred embodiment of the present invention, the external component is provided with a protrusion on the side facing the hydraulic component; the connection side of the hydraulic component and the external component is provided with a groove that cooperates with the protrusion to facilitate the positioning of the external component.

[0012] Technical effects and advantages of the utility model:

[0013] 1. The hydraulic dynamic balancing coupling is fixed by the interference fit between the inner hole of the hydraulic coupling and the shaft. The interference fit formed by the hydraulic coupling hoop on the shaft is not only sufficient to prevent slippage caused by the maximum torque, but also avoids scratches on the shaft head cone surface caused by the friction and damage of the drying coupling, so as to achieve the connection effect, effectively avoid material waste and damage to the shaft head cone surface, and solve the problems of difficult rotor dynamic balancing connection and difficult coupling disassembly. It realizes the simplicity of rotor dynamic balancing connection components, improves the efficiency of rotor balancing work, and avoids the problems of previous drying and clamping couplings in processing, inventory, and materials.

[0014] 2. Through standardized settings, multiple thread grooves are evenly distributed at equal distances from the axis center on the side wall of the hydraulic parts near the tip of the shaft head, avoiding the screw hole and the O-groove of the shaft head being too close, resulting in the screw hole and the groove being connected during the machining process, thereby causing damage. This not only improves production efficiency, but also avoids material waste, and promotes the standardization of tooling management in actual production applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of a hydraulic dynamic balancing joint in the utility model.

[0016] Figure 2 The utility model is a structural schematic diagram of the hydraulic assembly structure of a hydraulic dynamic balancing joint.

[0017] Figure 3 The utility model is a structural schematic diagram of a hydraulic dynamic balancing joint for the middle and outer joints.

[0018] Figure 4 for Figure 3 Cross-sectional view at AA.

[0019] The accompanying drawings are marked as follows: 1. Washer for drawing; 2. External press-fit part; 3. Internal press-fit part; 4. Back ring of external press-fit part; 5. O-ring of external press-fit part; 6. Back ring of internal press-fit part; 7. O-ring of internal press-fit part; 8. Pressurized joint of coupling; 9. Plug; 10. Hydraulic part; 11. High-pressure oil circuit; 12. Low-pressure oil circuit; 13. Shaft head; 14. O-ring for hole; 15. O-ring for shaft; 16. External connection part; 17. Hexagon socket screw hole;

[0020] 18. Threaded through hole; 19. Hydraulic through hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See attached Figure 2-4 As shown, in order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydraulic dynamic balancing joint, comprising a shaft head 13, a hydraulic component 10 and an external component 16; the hydraulic component 10 is sleeved on the shaft head 13, and the hydraulic component 10 and the shaft head 13 are interference fit; the shaft head 13 is inserted into the hydraulic component 10, and one end is provided with a hydraulic through hole 19 that passes through the axis and is perpendicular to the axis, and the hydraulic through hole 19 has one or more; the hydraulic component 10 is provided with a plurality of thread grooves uniformly distributed at equal distances from the axis on the side wall near the tip of the shaft head 13; the external component 16 is provided with threaded through holes corresponding to the thread grooves 18 and a hexagonal screw hole 17, the threaded through hole 18 and the hexagonal screw hole 17 are alternately opened, the external component 16 is connected to the hydraulic component 10 by a through wire and a hexagonal screw bolt, the hydraulic component 10 is grooved near the inner side wall away from the tip of the shaft head 13, and an O-ring 14 for a hole is provided in the groove, and the side of the O-ring 14 for a hole away from the tip of the shaft head 13 is abutted with a back ring; the shaft head 13 is grooved near the side wall of the tip, and an O-ring 15 for a shaft is provided in the groove, and the O-ring 15 for a shaft is abutted with a back ring near the side of the shaft tip to improve the sealing of the device. At the same time, the setting of the back ring prevents the O-ring from deforming under pressure.

[0023] like Figure 3 As shown, in the embodiment of the present invention, the evenly distributed thread grooves are spaced at an angle of 30°, and the threaded through holes 18 and the hexagonal screw holes 17 are alternately distributed at a corresponding interval angle of 30°, which is used for standardized settings, facilitates standardized assembly, and reduces processing difficulty.

[0024] like Figure 1As shown, in an embodiment of the present utility model, an assembly structure that cooperates with the hydraulic dynamic balancing joint is adopted, including a drawing washer 1, an external press-in part 2, an internal press-in part 3, a coupling pressure joint 8, a plug 9, a high-pressure oil circuit 11, and a low-pressure oil circuit 12; the internal press-in part 3 abuts the tip of the shaft head 13; the external press-in part 2 is sleeved on the outside of the internal press-in part 3, and the external press-in part 2 abuts against the hydraulic part 10 through the drawing washer 1; the coupling pressure joint 8 passes through the internal press-in part 3 and is connected to the hydraulic through hole 19 inside the shaft head 13, and its other end is connected to the high-pressure oil circuit 11; the external press-in part 2 is provided with a groove on the side away from the shaft head 13, and the internal press-in part 3 is expanded outward away from the side of the shaft head 13 and is slidably connected to the groove, and its sliding gap forms a cavity, which is connected to the low-pressure oil circuit 12; the plug 9 is installed on the internal press-in part 3 to seal the cavity.

[0025] In an embodiment of the present invention, the inner side wall of the external press-in part 2 close to the tip of the shaft head 13 is grooved, and an external pressure part O-ring 5 is provided in the groove, and the external pressure part O-ring 5 abuts against the internal press-in part 3, and the external pressure part O-ring 5 abuts against the external pressure part back ring 4 on the side close to the shaft head 13; the outer side wall of the internal press-in part 3 away from the tip of the shaft head 13 is grooved, and an internal pressure part O-ring 7 is provided in the groove, and the internal pressure part O-ring 7 abuts against the external press-in part 2, and the internal pressure part O-ring 7 abuts against the internal pressure part back ring 6 on the side away from the shaft head 13, thereby improving the sealing of the device. At the same time, the setting of the back ring prevents the O-ring from deforming under pressure.

[0026] like Figure 1 and Figure 3 As shown, in the embodiment of the present utility model, the external component 16 is provided with a protrusion toward the hydraulic component 10 ; the connection side of the hydraulic component 10 and the external component 16 is provided with a groove that cooperates with the protrusion to facilitate the positioning of the external component 16 .

[0027] During the operation of the present utility model, the installation steps are as follows: gently install the hydraulic component 10 on the shaft until it no longer moves, check the fit and contact, and check the distance required for oil pressure pressing; install the assembly structure, connect the low-pressure oil circuit 12 and the high-pressure oil circuit 11, and push through the low-pressure oil circuit 12. Install a pressure gauge with a range of 100MPa on the low-pressure oil circuit 12, and install a dial indicator for detecting the displacement on the end face of the hydraulic component 10. Install a pressure gauge with a range of 300MPa on the high-pressure oil circuit 11. Increase the pressure of the oil pump of the low-pressure oil circuit 12 to fully press the hydraulic component 10 on the shaft end. Then slowly increase the pressure of the high-pressure pump of the high-pressure oil circuit 11, and push while increasing the pressure. Use the minimum expansion oil pressure to push the hydraulic component 10 to the required push position, and record the maximum expansion oil pressure during push as a reference for disassembly. Maintain the oil pressure of the low-pressure pump of the thruster and relieve the pressure of the high-pressure pump; after the high-pressure pump has been relieved for about an hour, relieve the oil pressure of the low-pressure pump, disassemble the assembly structure, and allow all the oil in the shaft hole to flow out; recheck the recessed depth of the shaft head 13, which should be measured at the original measured position to confirm that it is consistent with the thrust position determined by the press-in amount; install the external component 16 on the hydraulic component 10, use the groove on the hydraulic component 10 to position it, and secure it with the hexagonal screw hole 17 and the through-wire.

[0028] During the working process of the present invention, the disassembly steps are as follows: install the assembly structure; push the assembly structure close to the end face of the hydraulic component 10 so that the axial distance between the drawing washer 1 and the hydraulic component 10 does not exceed 2.0 mm to prevent the shaft end thread from being damaged when the hydraulic component 10 is withdrawn at high speed, connect the low-pressure oil circuit 12 to keep the drawing washer 1 in contact with the end face of the hydraulic component 10; connect the high-pressure oil circuit 11, slowly increase the oil pressure, and check whether there is any oil leakage or abnormality in various parts of the oil pipe joint; continue to increase the oil pressure, and after reaching the expansion oil pressure recorded during the previous assembly, stabilize for a period of time, and then slightly increase the pressure until the inner hole of the hydraulic component 10 expands and loosens and withdraws from the shaft head 13; remove the assembly structure after the oil pump oil pressure is released, and remove the hydraulic component 10 from the shaft.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic dynamic balancing adapter, comprising a shaft head, characterized in that: It also includes hydraulic components and external components; The hydraulic component is sleeved on the shaft head, and the hydraulic component and the shaft head are interference fit; One end of the shaft head inserted into the hydraulic component is provided with a hydraulic through hole penetrating the axis and perpendicular to the axis, and there are one or more hydraulic through holes; The hydraulic component is provided with a plurality of thread grooves evenly distributed at equal distances from the axis on the side wall near the tip of the shaft head; The external connection member is provided with a threaded through hole and a hexagonal screw hole corresponding to the thread groove, the threaded through hole and the hexagonal screw hole are alternately provided, and the external connection member is connected to the hydraulic component by a through thread and a hexagonal screw bolt.

2. The hydraulic dynamic balancing adapter according to claim 1, characterized in that: It also includes a drawing washer, an external press-in part, an internal press-in part, a coupling pressure joint, a plug, a high-pressure oil circuit, and a low-pressure oil circuit; the internal press-in part abuts the tip of the shaft head; the external press-in part is sleeved on the outside of the internal press-in part, and the external press-in part abuts against the hydraulic part through the drawing washer; the coupling pressure joint passes through the internal press-in part and is connected to the hydraulic through hole inside the shaft head, and its other end is connected to the high-pressure oil circuit; the external press-in part is provided with a groove away from the shaft head side, and the internal press-in part expands outward away from the shaft head side and is slidably connected to the groove, and its sliding gap forms a cavity, and the cavity is connected to the low-pressure oil circuit; the plug is installed on the internal press-in part to seal the cavity.

3. The hydraulic dynamic balancing adapter according to claim 1, characterized in that: The evenly distributed thread grooves are spaced at an angle of 30°, and the threaded through holes and hexagonal screw holes are alternately distributed at an angle of corresponding 30°.

4. The hydraulic dynamic balancing adapter according to claim 2, characterized in that: The outer side wall of the outer press-in part close to the tip of the shaft head is grooved, and an outer pressure part O-ring is provided in the groove. The outer pressure part O-ring abuts against the inner press-in part, and the outer pressure part O-ring abuts against the outer pressure part back ring close to the shaft head; the outer side wall of the inner press-in part away from the tip of the shaft head is grooved, and an inner pressure part O-ring is provided in the groove. The inner pressure part O-ring abuts against the outer press-in part, and the inner pressure part O-ring abuts against the inner pressure part back ring away from the shaft head.

5. The hydraulic dynamic balancing adapter according to claim 1, characterized in that: The hydraulic component is grooved near the inner side wall away from the tip of the shaft head, and an O-ring for a hole is provided in the groove, and the side of the O-ring for the hole away from the tip of the shaft head abuts against a back ring; the shaft head is grooved near the tip side wall, and an O-ring for a shaft is provided in the groove, and the side of the O-ring for the shaft abuts against a back ring near the tip of the shaft head.

6. The hydraulic dynamic balancing adapter according to claim 1, characterized in that: The external connection part is provided with a protrusion facing the hydraulic part; the connection side of the hydraulic part and the external connection part is provided with a groove matched with the protrusion.

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