Hydraulic dismounting tool for conical-face interference fit half-coupling

Abstract

The present application relates to semi-coupling hydraulic dismounting technical field, especially to a kind of conical face interference fit semi-coupling hydraulic dismounting tool, for connecting semi-coupling and manual high-pressure oil pump, nut, hydraulic stretcher, stud bolt, propulsion ring and hand rod;Stud bolt is arranged on the main shaft of semi-coupling, propulsion ring is sleeved on the outer side of stud bolt, for cooperating with the end face of semi-coupling close to the side of stud bolt;Hydraulic stretcher is sleeved on the outer side of stud bolt, and is in contact with propulsion ring, for connecting manual high-pressure oil pump;Nut is sleeved on the outer side of stud bolt, and is in contact with hydraulic stretcher;Hand rod is movably connected with nut.It is convenient to install and dismount semi-coupling, greatly improves work efficiency;Keyless cooperation ensures that rotor has enough high dynamic balance precision;Semi-coupling propulsion quantity is easy to control, and then ensure appropriate interference amount;On-site does not need to use open fire heat sleeve, improves the safety, reliability of equipment.

Description

Technical Field

[0001] This invention relates to the field of hydraulic disassembly and assembly technology of half-couplings, and in particular to a hydraulic disassembly and assembly tool for a conical surface interference fit half-coupling. Background Technology

[0002] As thermal power plants develop towards large-capacity, high-parameter, and high-power ultra-supercritical units, the transmission requirements between centrifugal pumps and power equipment are becoming increasingly stringent. Half-couplings must not only meet the demands of high torque and high-speed operation but also possess characteristics such as high tightening precision, convenient installation and disassembly, and safety and economy. High-torque half-couplings often employ cylindrical surface, cylindrical surface with key, and conical surface interference fit connections. The former two often require open flame heating during on-site installation, and poor temperature control can cause equipment deformation, affecting its precision control. Conical surface interference fit half-couplings can solve this problem. Power plant operating conditions are extremely harsh, such as ultra-high pressure and extremely confined spaces. If the hydraulic disassembly and assembly tools for half-couplings are poorly designed, hydraulic cylinders can easily burst, break, or twist, and excessive deformation of the support can lead to jamming and oil leaks, causing serious losses to the power plant. Therefore, the safety and reliability of hydraulic disassembly and assembly tools for half-couplings are particularly important. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide a hydraulic assembly / disassembly tool for a conical interference fit half-coupling. This tool utilizes a manual high-pressure oil pump to inject oil into a hydraulic tensioner and an electric high-pressure oil pump to inject oil into the half-coupling. Oil is injected while the coupling is advanced according to specified requirements until a predetermined advancement amount is reached, at which point the operation stops. This hydraulic assembly for conical interference fit couplings meets the installation and usage requirements of high-power, high-torque couplings. Installation and disassembly are convenient, greatly improving work efficiency. The keyless fit ensures sufficiently high dynamic balance accuracy of the rotor. The advancement amount of the half-coupling is easily controlled, thus ensuring an appropriate interference fit. On-site hot-fitting of the coupling does not require the use of an open flame, improving the safety and reliability of the equipment.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] This invention provides a hydraulic disassembly and assembly tool for a conical surface interference fit half coupling, used to connect the half coupling and a manual high-pressure oil pump, including a nut, a hydraulic tensioner, a double-ended bolt, a push ring, and a hand bar;

[0006] The double-ended bolt is mounted on the main shaft of the half-coupling. The push ring is sleeved on the outside of the double-ended bolt and is used to mate with the end face of the half-coupling near the double-ended bolt. The hydraulic tensioner is sleeved on the outside of the double-ended bolt and contacts the push ring, and is used to connect a manual high-pressure oil pump. The nut is sleeved on the outside of the double-ended bolt and contacts the hydraulic tensioner. The hand rod is movably connected to the nut.

[0007] The hand lever is used to screw in or out the nut; oil is added while pushing the lever according to the specified requirements until the predetermined amount of pushing is reached, at which point the operation can be stopped.

[0008] In one embodiment of the invention, the central axis of the propulsion ring, hydraulic tensioner, nut, and double-ended bolt is the same as the central axis of the main shaft of the half coupling.

[0009] In one embodiment of the present invention, the hydraulic tensioner includes a cylinder, a piston, and a seat;

[0010] The frame is L-shaped and includes a first annular crossbar and a first annular vertical bar. The first annular crossbar is in close contact with the outer surface of the double-ended bolt, and the first annular vertical bar is located on the side of the first annular crossbar near the half coupling and is in contact with the end face of the half coupling.

[0011] The cylinder body is L-shaped and includes a second annular horizontal bar and a second annular vertical bar. The second annular vertical bar is disposed on the side of the first annular horizontal bar away from the first annular vertical bar and is in contact with the upper surface of the first annular horizontal bar. The second annular horizontal bar is disposed on the side of the second annular vertical bar close to the first annular vertical bar, and the end of the second annular vertical bar away from the second annular horizontal bar is in contact with the first annular vertical bar.

[0012] The first annular horizontal bar, the first annular vertical bar, the second annular horizontal bar, and the second annular vertical bar form a hollow space, and a piston is installed in the hollow space.

[0013] In one embodiment of the present invention, a limit port is provided on the side of the piston away from the side that is close to the second annular crossbar to ensure that the operation does not exceed the maximum propulsion stroke. The limit port is painted red. When the stroke exceeds the limit area, i.e. the maximum propulsion stroke, pressure must not be applied to avoid accidents.

[0014] In one embodiment of the present invention, an oil injection pipe connected to a manual high-pressure oil pump is provided on the side of the piston near the second annular vertical rod.

[0015] In one embodiment of the present invention, an oil inlet is provided at the connection between the second annular vertical rod and the manual high-pressure oil pump. The oil inlet is connected to the manual high-pressure oil pump through a transition joint and does not require adjustment during use.

[0016] In one embodiment of the present invention, the oil inlet is connected to the hollow space via an oil inlet pipe.

[0017] In one embodiment of the present invention, a first annular groove is provided on the side of the cylinder body connected to the seat, and a retaining ring and an O-ring are provided in the first annular groove. The retaining ring is provided on the side close to the second annular vertical rod, and the O-ring is provided on the side close to the first annular horizontal rod, and is in close contact with the first annular horizontal rod and the retaining ring.

[0018] In one embodiment of the present invention, a polyurethane sealing ring is provided on the side of the piston near the second annular vertical rod, and the polyurethane sealing ring is in close contact with the upper surface of the first annular horizontal rod and the lower surface of the second annular horizontal rod.

[0019] The polyurethane sealing ring is made of polyurethane rubber I. After casting, the surface finish of the finished product is ensured. The polyurethane sealing ring is used to seal in mineral oil media under specified pressure conditions of -30℃ to +120℃.

[0020] In one embodiment of the present invention, the polyurethane sealing ring is provided with a second annular groove on the side near the second annular vertical rod.

[0021] The conical surface interference fit half-coupling hydraulic disassembly and assembly tool of the present invention makes it convenient to install and disassemble the half-coupling without the need for open flame on site, which improves the safety and reliability of the equipment and greatly improves work efficiency; the keyless fit ensures that the rotor has a sufficiently high dynamic balance accuracy; the half-coupling advance is easy to control, thereby ensuring an appropriate interference fit.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention provides a hydraulic assembly for installing and removing conical interference fit half-couplings. This makes installing and removing half-couplings convenient and greatly improves work efficiency. The keyless fit ensures that the rotor has a sufficiently high dynamic balance accuracy. The half-coupling advance is easy to control, thereby ensuring an appropriate interference fit. No open flame heat fitting is required on site, which improves the safety and reliability of the equipment. Attached Figure Description

[0024] Figure 1 This is an installation diagram of a hydraulic disassembly and assembly tool for a conical surface interference fit half coupling according to the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a hydraulic disassembly and assembly tool for a conical surface interference fit half coupling according to the present invention;

[0026] Labels in the diagram: 1. Double-ended bolt; 2. Nut; 3. Hydraulic tensioner; 301. Base; 3011. First annular crossbar; 3012. First annular vertical bar; 302. Cylinder body; 3021. Second annular crossbar; 3022. Second annular vertical bar; 30221. First annular groove; 30222. Oil inlet; 30223. Oil inlet pipe; 303. Piston; 3031. Limiting port; 304. O-ring seal; 305. Retaining ring; 306. Polyurethane sealing ring; 3061. Second annular groove; 4. Propulsion ring; 5. Hand rod; 6. Half coupling; 601. Half coupling spindle; 7. First high-pressure hose; 8. Second high-pressure hose; 9. Manual high-pressure oil pump; 10. Pressure indicator; 11. Electric high-pressure oil pump; 1101. Oil outlet; 1102. Oil inlet. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0028] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0031] Unless otherwise specified, all components used in the following embodiments are conventional components in the art.

[0032] Example 1

[0033] This embodiment provides a hydraulic disassembly and assembly tool for a conical surface interference fit half coupling.

[0034] An installation diagram of a hydraulic disassembly and assembly tool for a conical interference fit half-coupling in this embodiment is shown below. Figure 1 As shown, the half-coupling 6 and the manual high-pressure oil pump 9 are connected. The oil inlet 30222 is connected to the transition joint and is connected to the manual high-pressure oil pump 9 through the first high-pressure hose 7. The manual high-pressure oil pump 9 is equipped with a pressure display 10. The electric high-pressure oil pump 11 is equipped with an oil outlet 1101 and an oil inlet 1102, and the oil outlet 1101 is connected to the half-coupling 6 through the second high-pressure hose 8.

[0035] A schematic diagram of a hydraulic disassembly and assembly tool for a conical interference fit half-coupling in this embodiment is shown below. Figure 2 As shown, it includes nut 2, hydraulic tensioner 3, double-ended bolt 1, push ring 4, and hand bar 5;

[0036] The double-ended bolt 1 is mounted on the main shaft 601 of the half-coupling. The push ring 4 is sleeved on the outside of the double-ended bolt 1 and is used to mate with the end face of the half-coupling 6 near the double-ended bolt 1. The hydraulic tensioner 3 is sleeved on the outside of the double-ended bolt 1 and contacts the push ring 4. It is used to connect the manual high-pressure oil pump 9. The nut 2 is sleeved on the outside of the double-ended bolt 1 and contacts the hydraulic tensioner 3. The hand rod 5 is movably connected to the nut 2.

[0037] Furthermore, the central axis of the push ring 4, the hydraulic tensioner 3, the nut 2, and the double-ended bolt 1 is the same as the central axis of the main shaft of the half coupling 6;

[0038] The hydraulic tensioner 3 includes a cylinder body 302, a piston 303, and a seat 301. The seat 301 is L-shaped and includes a first annular crossbar 3011 and a first annular vertical bar 3012. The first annular crossbar 3011 is in close contact with the outer surface of the double-ended bolt 1, and the first annular vertical bar 3012 is located on the side of the first annular crossbar 3011 near the half-coupling 6 and is in contact with the end face of the half-coupling 6. The cylinder body 302 is L-shaped and includes a second annular crossbar 3021 and a second annular vertical bar 3022. The second annular vertical bar 3022 is located on the side of the first annular crossbar 3011 away from the first annular vertical bar 301. The second annular rod 3021 is located on one side of the second annular rod 3022 and is attached to the upper surface of the first annular rod 3011. The second annular rod 3022 is located on the side of the second annular rod 3022 close to the first annular rod 3012, and the end of the second annular rod 3022 away from the second annular rod 3021 is attached to the first annular rod 3012. The side of the second annular rod 3022 away from the first annular rod 3012 is attached to the nut. The first annular rod 3011, the first annular rod 3012, the second annular rod 3021 and the second annular rod 3022 form a hollow space, and a piston 303 is provided in the hollow space.

[0039] A limit port 3031 is provided on the side of piston 303 away from the side that is close to the second annular crossbar 3021 to ensure that the operation does not exceed the maximum propulsion stroke. The limit port 3031 is painted red. When the stroke exceeds the limit area, i.e. the maximum propulsion stroke, pressure must not be applied to avoid accidents. An oil injection pipe 30223 connected to the manual high-pressure oil pump 9 is provided on the side of piston 303 near the second annular vertical bar 3022.

[0040] The second annular vertical rod 3022 is provided with an oil inlet 30222 at the connection between it and the manual high-pressure oil pump 9. The oil inlet 30222 is connected to the manual high-pressure oil pump 9 through a transition joint and does not require adjustment during use. The oil inlet 30222 is connected to the hollow space through an oil inlet pipe 30223.

[0041] A first annular groove 30221 is provided on the side where the cylinder body 302 is connected to the seat 301. A retaining ring 305 and an O-ring seal 304 are provided in the first annular groove 30221. The retaining ring 305 is located on the side close to the second annular vertical rod 3022, and the O-ring seal 304 is located on the side close to the first annular horizontal rod 3011, and is in close contact with the first annular horizontal rod 3011 and the retaining ring 305.

[0042] A polyurethane sealing ring 306 is provided on the side of the piston 303 near the second annular vertical rod 3022. The polyurethane sealing ring 306 is in close contact with the upper surface of the first annular horizontal rod 3011 and the lower surface of the second annular horizontal rod 3021.

[0043] The polyurethane sealing ring 306 is made of polyurethane rubber I. After casting, the surface finish of the finished product is ensured. The polyurethane sealing ring 306 is used to seal in mineral oil media with hydraulic oil at -30℃ to +120℃ and specified pressure conditions. The polyurethane sealing ring 306 has a second annular groove 3061 on the side near the second annular vertical rod 3022.

[0044] When using it, use the hand lever 5 to screw in the nut 2, and add oil while pushing it in according to the specified requirements until the specified amount of pushing is reached, then stop the operation; and use an external dial indicator to measure the initial positioning dimension of the right end face of the half coupling 6;

[0045] During operation, clean the mating surfaces between the main shaft 601 and the half-coupling 6, check the smoothness, and recheck the contact area using the coloring method to ensure it is greater than 80%. Apply hydraulic oil evenly to the contact surfaces between the main shaft 601 and the half-coupling 6, and manually push the half-coupling 6 into place. At this point, the position of the half-coupling 6 on the main shaft 601 is zero. Install the hydraulic disassembly and assembly tool assembly, oil injection device, and auxiliary tooling as required, adjust the dial indicator to zero, and record the initial reading.

[0046] Use the manual high-pressure oil pump 9 to inject oil into the hydraulic tensioner 3, and the electric high-pressure oil pump 11 to inject oil into the half coupling 6. When using the hydraulic system, after the high-pressure pipeline is connected, the air needs to be purged until clean hydraulic oil without air bubbles flows out, and then tighten the plug at the side connector.

[0047] Use the manual high-pressure oil pump 9 to push the half-coupling 6 to the starting position, flattening the gap between the half-coupling spindle 601 and the half-coupling 6, establishing a certain pressure between the contact surfaces to prevent excessive oil leakage during oil injection; use the electric high-pressure oil pump 11 to allow hydraulic oil to enter the contact surface between the half-coupling spindle 601 and the half-coupling 6, establishing a certain pressure, and allowing the pressure to rise until oil overflows; simultaneously use the electric high-pressure oil pump 11 and the manual high-pressure oil pump to inject oil while advancing, while monitoring the pressure display 10 for oil overflow. The oil injection pressure should be increased slowly, and if oil overflows, wait a moment for the workpieces to expand before injecting oil; while advancing, monitor the reading of the advancing pressure display 10, and advance slowly; monitor the reading of the external dial gauge until the determined advancing amount is reached, then stop the operation.

[0048] After the half coupling 6 is pushed into place, the pressure of the pushing device needs to be maintained. Open the pressure relief valve of the electric high-pressure oil pump 11 to relieve pressure. Wait ≥5 minutes until the two contact surfaces are in direct contact and the inclined plane self-locking condition is met. Then open the pressure relief valve of the manual high-pressure oil pump 9 to relieve pressure. Then remove the tooling and fixtures.

[0049] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the interpretation of the present invention, without departing from the scope of the invention, should be within the protection scope of the present invention.

Claims

1. A hydraulic disassembly and assembly tool for a conical surface interference fit half-coupling, used to connect a half-coupling (6) and a manual high-pressure oil pump (9), characterized in that, Includes nut (2), hydraulic tensioner (3), double-ended bolt (1), push ring (4) and hand bar (5); The double-ended bolt (1) is mounted on the main shaft (601) of the half-coupling (6). The push ring (4) is sleeved on the outside of the double-ended bolt (1) and is used to mate with the end face of the half-coupling (6) near the double-ended bolt (1). The hydraulic tensioner (3) is sleeved on the outside of the double-ended bolt (1) and contacts the push ring (4) for connecting the manual high-pressure oil pump (9). The nut (2) is sleeved on the outside of the double-ended bolt (1) and contacts the hydraulic tensioner (3). The hand rod (5) is movably connected to the nut (2). The central axis of the push ring (4), hydraulic tensioner (3), nut (2) and double-headed bolt (1) is the same as the central axis of the main shaft (601) of the half coupling; The hydraulic tensioner (3) includes a cylinder (302), a piston (303), and a seat (301). The bracket (301) is L-shaped and includes a first annular crossbar (3011) and a first annular vertical bar (3012). The first annular crossbar (3011) is close to the outer surface of the double-headed bolt (1), and the first annular vertical bar (3012) is located on the side of the first annular crossbar (3011) near the half coupling (6) and is in contact with the end face of the half coupling (6). The cylinder body (302) is L-shaped and includes a second annular horizontal bar (3021) and a second annular vertical bar (3022). The second annular vertical bar (3022) is disposed on the side of the first annular horizontal bar (3011) away from the first annular vertical bar (3012) and is in contact with the upper surface of the first annular horizontal bar (3011). The second annular horizontal bar (3021) is disposed on the side of the second annular vertical bar (3022) close to the first annular vertical bar (3012), and the end of the second annular horizontal bar (3021) away from the second annular vertical bar (3022) is in contact with the first annular vertical bar (3012). The first annular horizontal bar (3011), the first annular vertical bar (3012), the second annular horizontal bar (3021), and the second annular vertical bar (3022) form a hollow space, and a piston (303) is provided in the hollow space. The conical interference fit half-coupling hydraulic disassembly and assembly tool is used to meet the installation requirements of high-power, high-torque couplings. The piston (303) has a limit port (3031) on the side away from the second annular crossbar (3021). The piston (303) is provided with an oil injection pipe (30223) connected to the manual high-pressure oil pump (9) on the side near the second annular vertical rod (3022). An oil inlet (30222) is provided at the connection between the second annular vertical rod (3022) and the manual high-pressure oil pump (9). The oil inlet (30222) is connected to the manual high-pressure oil pump (9) through a transition joint. The oil inlet (30222) is connected to the hollow space via an oil inlet pipe; The cylinder body (302) is provided with a first annular groove (30221) on the side connected to the seat (301). A retaining ring (305) and an O-ring seal (304) are provided in the first annular groove (30221). The retaining ring (305) is located on the side close to the second annular vertical rod, and the O-ring seal (304) is located on the side close to the first annular horizontal rod and is in close contact with the first annular horizontal rod and the retaining ring (305). A polyurethane sealing ring (306) is provided on the side of the piston (303) near the second annular vertical rod (3022). The polyurethane sealing ring (306) is in close contact with the upper surface of the first annular horizontal rod (3011) and the lower surface of the second annular horizontal rod (3021). The polyurethane sealing ring (306) has a second annular groove (3061) on the side near the second annular vertical rod (3022). The polyurethane sealing ring is made of polyurethane rubber I. After casting, the surface finish of the finished product is ensured. The polyurethane sealing ring is used to seal mineral oil media under specified pressure conditions of -120℃ to +120℃.

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