A coupling outer gear sleeve dismounting device

Abstract

The utility model discloses a kind of coupling outer gear sleeve dismounting devices, including shaft, outer gear sleeve and dismounting device;Shaft neck of shaft has taper, outer gear sleeve can be clamped on shaft neck, and oil injection passage is formed between shaft neck and the end surface of shaft;Dismounting device includes oil injection mechanism, push mechanism, connecting barrel and positioning ring;Oil injection mechanism can inject hydraulic oil to oil injection passage, to open outer gear sleeve on shaft neck;Connecting barrel is installed at the end of shaft, and there is the first outer cylinder surface concentric with shaft on connecting barrel, positioning ring is slidably sleeved on the first outer cylinder surface, and push mechanism is pushed out by positioning ring when pushing outer gear sleeve along the axial direction of shaft.The push mechanism is hollow jack, and hollow jack is sleeved on connecting barrel.The utility model installs outer gear sleeve on shaft neck, can ensure that outer gear sleeve is concentric with shaft neck, and simultaneously plays a protective role when outer gear sleeve is removed, prevent suddenly jumping out and hurt.

Description

Technical Field

[0001] This utility model relates to the field of power equipment maintenance, and in particular to a coupling external gear sleeve disassembly and assembly device. Background Technology

[0002] Currently, the external gear sleeve of the small steam turbine coupling is a clamping sleeve structure, which needs to be replaced after long-term use and wear. During replacement, the old external gear sleeve needs to be removed from the journal of the shaft, and then the new external gear sleeve needs to be pushed up and clamped onto the journal. However, it is difficult to ensure that the external gear sleeve and the journal are concentric by directly pushing the external gear sleeve. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a coupling external gear sleeve disassembly and assembly device, which can ensure that the external gear sleeve and the journal are concentric when the external gear sleeve is installed on the journal.

[0004] Technical Solution: To achieve the above objectives, this utility model provides a coupling external gear sleeve disassembly and assembly device, comprising a machine shaft, an external gear sleeve, and a disassembly and assembly device; the journal of the machine shaft has a taper, and the external gear sleeve can be clamped onto the journal, forming an oil injection channel between the journal and the end face of the machine shaft; the disassembly and assembly device includes an oil injection mechanism, a pushing mechanism, a connecting cylinder, and a positioning ring; the oil injection mechanism can inject hydraulic oil into the oil injection channel to open the external gear sleeve on the journal; the connecting cylinder is installed at the end of the machine shaft, and the connecting cylinder has a first outer cylinder surface concentric with the machine shaft, the positioning ring is slidably sleeved on the first outer cylinder surface, and when the pushing mechanism pushes out along the axial direction of the machine shaft, it pushes the external gear sleeve through the positioning ring.

[0005] Furthermore, the pushing mechanism is a hollow jack, which is sleeved on the connecting cylinder; the hollow jack is connected to the first oil pump, and when the first oil pump injects oil into the hollow jack, the hollow jack pushes out along the axial direction of the machine shaft.

[0006] Furthermore, the connecting cylinder is provided with a second outer cylinder surface, the second outer cylinder surface has an external thread structure, the hollow part of the hollow jack is provided with an internal thread structure, and the hollow jack is fitted onto the second outer cylinder surface of the connecting cylinder through threaded engagement.

[0007] Furthermore, the outer diameter of the first outer cylinder surface is smaller than that of the second outer cylinder surface, forming a stepped surface between the first and second outer cylinder surfaces; a buffer spring is fitted on the first outer cylinder surface, and the buffer spring is located between the positioning ring and the stepped surface.

[0008] Furthermore, the end of the machine shaft is provided with an external thread structure, and the inner wall of the connecting cylinder is provided with an internal thread structure. The connecting cylinder is installed at the end of the machine shaft through threaded engagement.

[0009] Furthermore, the oil injection mechanism includes an oil injection pipe, one end of which is connected to a second oil pump, and the other end of which passes through a connecting cylinder and is inserted into the oil injection channel from the end face of the machine shaft.

[0010] Furthermore, the oil injection channel is provided with an internal thread structure, and the end of the oil injection pipe is provided with an external thread structure. The oil injection pipe is connected to the oil injection channel through threaded connection.

[0011] Beneficial effects: The present invention provides a coupling external gear sleeve disassembly and assembly device, wherein a connecting cylinder is installed on the machine shaft, the connecting cylinder has a first outer cylinder surface concentric with the machine shaft, a positioning ring is slidably sleeved on the first outer cylinder surface, and a hollow jack indirectly pushes the external gear sleeve through the positioning ring, the end face of the positioning ring is in contact with the end face of the external gear sleeve to ensure that the external gear sleeve is concentric with the journal when installed on the journal. Attached Figure Description

[0012] Appendix Figure 1 This is a schematic diagram of the overall structure of the coupling;

[0013] Appendix Figure 2 A structural schematic diagram of the machine shaft, external gear sleeve, and disassembly / assembly device;

[0014] Appendix Figure 3 This is a schematic diagram of the connecting cylinder.

[0015] Appendix Figure 4 This is a schematic diagram of the oil injection pipe. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] As attached Figures 1 to 4 The aforementioned coupling external gear sleeve disassembly and assembly device includes a machine shaft 1, an external gear sleeve 2, and a disassembly and assembly device. The machine shaft 1 has a journal 3, which has a taper. The structure of the coupling is shown in the attached figure. Figure 1 As shown, the coupling consists of an outer gear sleeve 2, an inner gear sleeve 15, an intermediate sleeve 16, and a hinge bolt 17. The outer gear sleeve 2 of the small steam turbine coupling is a tension-fitting structure. After long-term use and wear, the outer gear sleeve 2 needs to be replaced. The outer gear sleeve 2 and the shaft 1 have a keyless conical fit, meaning that the inner circle of the outer gear sleeve 2 also has a certain taper. When the coupling is installed on the shaft 1, the outer gear sleeve 2 is correspondingly clamped onto the journal 3. An oil injection channel 4 is formed between the journal 3 and the end face of the shaft 1.

[0018] The disassembly and assembly device includes an oil injection mechanism and a pushing mechanism. The oil injection mechanism can inject hydraulic oil into the oil injection channel 4. After the hydraulic oil enters the mating gap between the journal 3 and the outer gear sleeve 2, it can open up the outer gear sleeve 2 on the journal 3.

[0019] During the disassembly of the old outer gear sleeve 2, after the oil injection mechanism expands the outer gear sleeve 2 by injecting oil, the outer gear sleeve 2 will pop outward due to the axial force generated by its taper. During the installation of the new outer gear sleeve 2, since the installation tightness is controlled by the axial push-in amount of the outer gear sleeve 2, a push-up mechanism is required to push the outer gear sleeve 2 to the required position during installation. Taking the taper of the inner circle of the outer gear sleeve 2 as 1:20 and the diameter of the large conical end of the journal 3 as Φ150mm as an example, the design requirement for the keyless conical fit tightness is 2‰ to 2.5‰ of the shaft diameter. Therefore, the axial push-in amount of the outer gear sleeve 2 is 150 × 2.5‰ × 20 = 7.5mm. However, if the outer gear sleeve 2 is directly pushed using the push-up mechanism, uneven force on the end face of the outer gear sleeve 2 is likely to occur, making it difficult to ensure that the outer gear sleeve 2 and the journal 3 are concentric.

[0020] To ensure concentricity between the outer gear sleeve 2 and the journal 3, this invention also includes a connecting cylinder 5 and a positioning ring 6. The connecting cylinder 5 is installed at the end of the machine shaft 1. Specifically, the end of the machine shaft 1 has an external thread structure, and the inner wall of the connecting cylinder 5 has an internal thread structure. The connecting cylinder 5 is installed at the end of the machine shaft 1 through a threaded fit. The connecting cylinder 5 has a first outer cylinder surface 7 concentric with the machine shaft 1, and the positioning ring 6 is slidably sleeved on the first outer cylinder surface 7, thus the positioning ring 6 is also concentric with the machine shaft 1. When the pushing mechanism pushes out along the axial direction of the machine shaft 1, the pushing mechanism pushes the outer gear sleeve 2 through the positioning ring 6. At this time, the end face of the positioning ring 6 is in close contact with the end face of the outer gear sleeve 2, and since the positioning ring 6 is concentric with the machine shaft 1, it also ensures that the outer gear sleeve 2 is concentric with the machine shaft 1.

[0021] To further ensure the concentricity of the outer gear sleeve 2 and the machine shaft 1, a hollow jack 8 is used as the pushing mechanism. The hollow jack 8 includes an outer cylinder and an inner piston with a hollow hole, allowing relative movement between the cylinder and the piston. A second outer cylinder surface 10 is provided on the connecting cylinder 5, with an external thread structure. The hollow part of the hollow jack 8 has an internal thread structure, meaning the inner wall of the cylinder has an internal thread structure. The hollow jack 8 is threaded onto the second outer cylinder surface 10 of the connecting cylinder 5. The hollow jack 8 is connected to a first oil pump 9. When the first oil pump 9 injects oil into the hollow jack 8, the piston of the hollow jack 8 can be pushed out along the axial direction of the machine shaft 1, thereby moving the positioning ring 6.

[0022] As attached Figure 2 and 3As shown, the outer diameter of the first outer cylinder surface 7 is smaller than that of the second outer cylinder surface 10, forming a stepped surface 11 between the first outer cylinder surface 7 and the second outer cylinder surface 10. A buffer spring 12 is fitted on the first outer cylinder surface 7, and the buffer spring 12 is located between the positioning ring 6 and the stepped surface 11. When disassembling the outer gear sleeve 2, oil is injected into the gap between the journal 3 and the outer gear sleeve 2, causing the outer gear sleeve 2 to be expanded. When the outer gear sleeve 2 expands until the tightness disappears, the outer gear sleeve 2 will pop out instantly due to the axial force generated by the taper. At this time, the positioning ring 6 and the connecting cylinder 5 play a protective and limiting role, preventing the outer gear sleeve 2 from directly detaching from the machine shaft 1 when it pops out. Because of the addition of the buffer spring 12, when the outer gear sleeve 2 pops out and hits the positioning ring 6, the buffer spring 12 will be compressed because it is between the positioning ring 6 and the stepped surface 11, thus playing a buffering role when the outer gear sleeve 2 pops out.

[0023] The oil injection mechanism includes an oil injection pipe 13, one end of which is connected to a second oil pump 14. In practical applications, the first oil pump 9 is a low-pressure oil pump, and the second oil pump 14 is a high-pressure oil pump. The oil injection channel 4 is formed by connecting axial and radial channels. One end of the axial channel is located at the center of the end face of the driven shaft 1, and the other end of the axial channel is connected to several radial channels, the other end of which extends to the journal 3. The other end of the oil injection pipe 13 passes through the connecting cylinder 5 and is inserted into the oil injection channel 4 from the end face of the driven shaft 1, that is, the oil injection pipe 13 is inserted into the axial channel of the oil injection channel 4. (See attached diagram) Figure 4 As shown, the end of the oil injection pipe 13 is provided with an external thread structure, while the oil injection channel 4 is provided with an internal thread structure. That is, the axial channel of the oil injection channel 4 has an internal thread structure, and the oil injection pipe 13 is connected to the oil injection channel 4 through threaded connection. The end of the oil injection pipe 13 that connects to the second oil pump 14 has a bent section, which is bent at a certain angle. In actual operation, due to the limited space, small coupling opening distance, and long high-pressure oil pipe joint, the oil injection pipe 13 is bent at a certain angle to facilitate on-site personnel installation and operation, and improve personnel safety.

[0024] The working principle of this utility model is as follows: The manual operation of the oil pump converts mechanical energy into hydraulic oil pressure energy, which is then transmitted to the working part via pipelines. When disassembling the old outer gear sleeve 2, high-pressure oil is injected into the fit gap between the outer gear sleeve 2 and the journal 3, causing the outer gear sleeve 2 to expand. When the outer gear sleeve 2 expands until the tightness disappears, the outer gear sleeve 2 will instantly pop out due to the axial force generated by the taper. At this time, the positioning ring 6, connecting cylinder 5, and buffer spring 12 can play a protective, limiting, and buffering role. When installing the new outer gear sleeve 2, the second oil pump 14 expands the fit gap of the outer gear sleeve 2 through the oil injection pipe 13, and feedback is provided through oil seeping out of the fit gap of the outer gear sleeve 2. The first oil pump 9 starts to inject oil into the hollow jack 8 to pressurize it. The hollow jack 8 pushes out axially, transmitting force to the end face of the outer gear sleeve 2 through the positioning ring 6. The outer gear sleeve 2 moves forward under force, reaching the required position, completing the press-fitting of the new outer gear sleeve 2.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A device for disassembling and assembling an external gear sleeve of a coupling, characterized in that: It includes a machine shaft (1), an outer gear sleeve (2), and a disassembly and assembly device; the journal (3) of the machine shaft (1) is tapered, and the outer gear sleeve (2) can be clamped on the journal (3). An oil injection channel (4) is formed between the journal (3) and the end face of the machine shaft (1); the disassembly and assembly device includes an oil injection mechanism, a push mechanism, a connecting cylinder (5), and a positioning ring (6); the oil injection mechanism can inject hydraulic oil into the oil injection channel (4) to open the outer gear sleeve (2) on the journal (3); the connecting cylinder (5) is installed at the end of the machine shaft (1), and the connecting cylinder (5) has a first outer cylinder surface (7) concentric with the machine shaft (1). The positioning ring (6) is slidably sleeved on the first outer cylinder surface (7). When the push mechanism pushes out along the axial direction of the machine shaft (1), it pushes the outer gear sleeve (2) through the positioning ring (6).

2. The coupling external gear sleeve disassembly and assembly device according to claim 1, characterized in that: The pushing mechanism is a hollow jack (8), which is fitted onto the connecting cylinder (5). The hollow jack (8) is connected to the first oil pump (9). When the first oil pump (9) injects oil into the hollow jack (8), the hollow jack (8) pushes out along the axial direction of the machine shaft (1).

3. The coupling external gear sleeve disassembly and assembly device according to claim 2, characterized in that: The connecting cylinder (5) is provided with a second outer cylinder surface (10), and the second outer cylinder surface (10) has an external thread structure. The hollow part of the hollow jack (8) is provided with an internal thread structure. The hollow jack (8) is fitted onto the second outer cylinder surface (10) of the connecting cylinder (5) through threaded engagement.

4. The coupling external gear sleeve disassembly and assembly device according to claim 3, characterized in that: The outer diameter of the first outer cylinder surface (7) is smaller than that of the second outer cylinder surface (10), and a stepped surface (11) is formed between the first outer cylinder surface (7) and the second outer cylinder surface (10); a buffer spring (12) is fitted on the first outer cylinder surface (7), and the buffer spring (12) is located between the positioning ring (6) and the stepped surface (11).

5. The coupling external gear sleeve disassembly and assembly device according to claim 1, characterized in that: The end of the machine shaft (1) is provided with an external thread structure, and the inner wall of the connecting cylinder (5) is provided with an internal thread structure. The connecting cylinder (5) is installed at the end of the machine shaft (1) through threaded engagement.

6. The coupling external gear sleeve disassembly and assembly device according to claim 1, characterized in that: The oil injection mechanism includes an oil injection pipe (13), one end of which is connected to a second oil pump (14), and the other end of which passes through a connecting cylinder (5) and is inserted into the oil injection channel (4) from the end face of the machine shaft (1).

7. The coupling external gear sleeve disassembly and assembly device according to claim 6, characterized in that: The oil injection channel (4) is provided with an internal thread structure, and the end of the oil injection pipe (13) is provided with an external thread structure. The oil injection pipe (13) is connected to the oil injection channel (4) by threaded connection.

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