Gas turbine rolling bearing inner ring puller in narrow space
By using a combined design of hydraulic cylinder and clamp in the rolling bearing inner ring pull-up tool of the gas turbine, the difficulty of disassembly of the bearing inner ring in a narrow space is solved, and rapid and safe disassembly is achieved, and the use of the equipment is extended through threaded connections and nuts. life.
Patent Information
- Application Number
- CN202420074363.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-11
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-01-11
AI Technical Summary
There is difficulty in disassembling the inner ring of the rolling bearing of the gas turbine in a narrow space, and the assembly and decomposition methods of the prior art are not effective enough, especially in high temperature, high pressure and low vibration environments, which make it difficult to achieve rapid and safe disassembly.
A gas turbine rolling bearing inner ring pulling tool including a roof plate, pulling drum, pressure cylinder and hydraulic cylinder is designed. Through the pressure transmission of the hydraulic cylinder and the design of the clamp plate, the bearing inner ring is quickly pulled out, and the bearing inner ring is connected through threads and Nut settings extend service life.
It realizes rapid, safe and reliable disassembly of the bearing inner ring in a narrow space, prevents the shaking of the pressure cylinder and extends the service life of the equipment.
Smart Images
Figure CN222360121U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a gas turbine rolling bearing inner ring puller in a narrow space, belonging to the technical field of gas turbine assembly. Background Art
[0002] Rolling bearings are commonly used in gas turbine engine rotor bearings. The harsh working conditions of gas turbines, such as high temperature, high speed, high pressure and low vibration, place strict requirements on bearing assembly and disassembly. The inner ring of the gas turbine engine rotor bearing is fitted with the shaft neck by interference fit, and the interference is usually between 0.01-0.1. During assembly, the inner ring of the bearing is heated, installed on the shaft, and pressure is applied until the inner ring of the bearing cools down to ensure that the inner ring of the bearing is pressed into place; during disassembly, it is at room temperature. The conventional disassembly method is to apply pressure through a hydraulic cylinder and use a clamp to pull out the inner ring of the bearing. Due to the load distribution of some gas turbine rotors, it is necessary to design the bearings supporting the rotor at both ends of the support frame, so that the bearings are in a relatively small space. When disassembling, a simple and effective bearing inner ring puller needs to be designed. Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a gas turbine rolling bearing inner ring puller in a narrow space, thereby realizing rapid, safe and reliable disassembly of the bearing inner ring in the narrow space.
[0004] The utility model discloses a gas turbine rolling bearing inner ring puller in a narrow space, comprising a top plate, a puller barrel, a pressure barrel and a hydraulic cylinder. The hydraulic cylinder is inserted into the puller barrel upside down, the hydraulic cylinder body passes through the top of the puller barrel and is fixedly connected to the puller barrel, the top plate is placed in the puller barrel, the bottom end of the top plate abuts against the top end of the shaft neck, the top end of the top plate is detachably connected to the end of the hydraulic cylinder output shaft, the pressure barrel is placed between the top plate and the puller barrel, and the puller barrel and the pressure barrel are sleeved on the outer periphery of the shaft neck;
[0005] The lower part of the puller cylinder includes a plurality of clamping plates, which are arranged at intervals and form a cylindrical shape. A clamping groove is arranged inwardly at the bottom of the clamping plate corresponding to the inner ring of the bearing. A handle is arranged on the upper part of the pressure cylinder, and the handle and the pressure cylinder are detachably arranged. Vertical holes are symmetrically arranged on the upper wall of the puller cylinder, and the handle passes through the vertical holes.
[0006] Apply downward force to the handle on the pressure cylinder to move the handle downward in the vertical bar hole. When the handle moves to the lowest end, continue to apply pressure to transfer the force to the puller cylinder. The puller cylinder is subjected to downward force, so that the clamping plate moves downward. The clamping groove at the bottom of the clamping plate is engaged with the inner ring of the bearing, and the hydraulic cylinder is started. The puller cylinder moves upward with the hydraulic cylinder body, and the inner ring of the bearing is immediately pulled out.
[0007] The upper wall of the puller cylinder is provided with a horizontal hole, which is connected with the vertical hole in an L-shape. The handle is turned into the horizontal hole to prevent the pressure cylinder from moving up and to prevent the pressure cylinder from shaking up and down during the working process.
[0008] The upper part of the pressure cylinder is provided with a second threaded hole, the connecting end of the handle and the pressure cylinder is provided with an external thread, and the handle passes through the second threaded hole and is connected to the pressure cylinder by threads. The threaded connection has little damage to the handle and the pressure cylinder, and can extend the service life.
[0009] The number of the handles is at least two, evenly distributed on the outer circumference of the pressure cylinder, and the number of the second threaded holes is consistent with the number of the handles. The two handles are convenient for users to operate and save effort.
[0010] The top of the puller barrel is provided with a first threaded hole, the outer periphery of the hydraulic cylinder body near the output shaft is provided with threads, the hydraulic cylinder body passes through the first threaded hole and is connected with the first threaded hole by threads. The hydraulic cylinder body is connected with the first threaded hole by threads, so that the hydraulic cylinder and the puller barrel can be disassembled, and the threaded connection has little damage to the hydraulic cylinder body and the puller barrel, and can extend the service life.
[0011] The invention also includes a nut, which penetrates the middle of the top plate and sets a connecting hole corresponding to the output end of the hydraulic cylinder, and sets a third threaded hole inwardly at the end of the output shaft of the hydraulic cylinder. The nut penetrates the connecting hole and the third threaded hole in sequence to connect the top plate with the output shaft of the hydraulic cylinder. By setting the nut, the connecting hole and the third threaded hole, the detachable connection between the top plate and the output shaft of the hydraulic cylinder is realized, and the damage to the top plate and the output shaft of the hydraulic cylinder is reduced, so that the service life can be extended.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] (1) The utility model realizes the rapid, safe and reliable removal of the inner ring of the bearing in a narrow space by providing a top plate, a puller cylinder, a pressure cylinder and a hydraulic cylinder.
[0014] (2) A horizontal hole is provided on the upper wall of the puller cylinder, and the horizontal hole is connected with the vertical hole to form an L-shape. The handle is turned into the horizontal hole to prevent the pressure cylinder from moving upward and to prevent the pressure cylinder from shaking up and down during operation.
[0015] (3) It also includes a nut, which passes through the middle of the top plate to set a connecting hole corresponding to the output end of the hydraulic cylinder, and a third threaded hole is set inward at the end of the hydraulic cylinder output shaft. The nut passes through the connecting hole and the third threaded hole in sequence to connect the top plate to the hydraulic cylinder output shaft. By setting the nut, the connecting hole and the third threaded hole, the top plate and the hydraulic cylinder output shaft are detachably connected, and the damage to the top plate and the hydraulic cylinder output shaft is reduced, which can extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1It is a schematic cross-sectional structural diagram of the utility model embodiment 1 after installation;
[0017] Figure 2 It is a schematic diagram of the main structure of the puller barrel;
[0018] Figure 3 It is a schematic diagram of the main structure of the pressure cylinder;
[0019] Figure 4 is a top view schematic diagram of the pressure cylinder;
[0020] Figure 5 It is a schematic diagram of the main structure after the top plate, puller cylinder, pressure cylinder and hydraulic cylinder are assembled.
[0021] In the figure: 1, journal; 2, top plate; 3, pressure cylinder; 4, handle; 5, puller cylinder; 6, hydraulic cylinder body; 7, hydraulic cylinder output shaft; 8, nut; 9, bearing inner ring; 10, vertical bar hole; 11, horizontal bar hole; 12, clamping plate; 13, clamping groove. DETAILED DESCRIPTION
[0022] The utility model is further described below in conjunction with embodiments:
[0023] Example 1
[0024] like Figure 1 to Figure 5 As shown, the utility model discloses a gas turbine rolling bearing inner ring puller in a narrow space, comprising a top plate 2, a puller barrel 5, a pressure barrel 3 and a hydraulic cylinder. The hydraulic cylinder is inserted into the puller barrel 5 upside down, and the hydraulic cylinder body 6 passes through the top of the puller barrel 5 and is fixedly connected to the puller barrel 5. The top plate 2 is placed in the puller barrel 5, and the bottom end of the top plate 2 abuts against the top end of the shaft neck 1. The shaft neck 1 is a hollow cylinder. A positioning protrusion is provided at the end of the top plate 2 close to the shaft neck 1. The positioning protrusion has a guiding function when the top plate 2 is installed. The top end of the top plate 2 is detachably connected to the end of the hydraulic cylinder output shaft 7. The pressure barrel 3 is placed between the top plate 2 and the puller barrel 5. The puller barrel 5 and the pressure barrel 3 are sleeved on the outer periphery of the shaft neck 1.
[0025] like Figure 2-Figure 4 As shown, the lower part of the puller cylinder 5 includes a plurality of clamping plates 12, which are arranged at intervals and form a cylindrical shape, and a clamping groove 13 is arranged inwardly at the bottom of the clamping plate 12 corresponding to the inner ring of the bearing 9; a handle 4 is arranged on the upper part of the pressure cylinder 3, and the handle 4 and the pressure cylinder 3 are detachably arranged, and vertical holes 10 are symmetrically arranged on the upper wall of the puller cylinder 5, and the handle 4 is arranged through the vertical holes 10.
[0026] like Figure 2 As shown, a horizontal hole 11 is provided on the upper wall of the puller tube 5, and the horizontal hole 11 is connected with the vertical hole 10 to form an L-shape.
[0027] like Figure 3 and Figure 4As shown, a second threaded hole is provided on the upper part of the pressure cylinder 3, an external thread is provided at the connection end of the handle 4 and the pressure cylinder 3, and the handle 4 passes through the second threaded hole and is threadedly connected to the pressure cylinder 3. There are two handles 4, which are evenly distributed on the outer periphery of the pressure cylinder 3, and the number of the second threaded holes is consistent with the number of the handles 4.
[0028] A first threaded hole is arranged at the top of the puller tube 5, and threads are arranged on the outer circumference of the hydraulic cylinder body 6 near the output shaft. The hydraulic cylinder body 6 passes through the first threaded hole and is connected with the first threaded hole by threads.
[0029] like Figure 1 As shown, it also includes a nut 8, which passes through the middle of the top plate 2 to set a connecting hole corresponding to the hydraulic cylinder output end, and a third threaded hole is set inward at the end of the hydraulic cylinder output shaft 7. The nut 8 passes through the connecting hole and the third threaded hole in sequence to connect the top plate 2 with the hydraulic cylinder output shaft 7.
[0030] Working process: apply downward force to the handle 4 on the pressure cylinder 3, so that the handle 4 moves downward in the vertical bar hole 10. When the handle 4 moves down to the lowest end, continue to apply pressure to transmit the force to the puller cylinder 5. The puller cylinder 5 is subjected to the downward force, so that the clamping plate 12 moves downward, and the clamping groove 13 at the bottom of the clamping plate 12 is clamped with the bearing inner ring 9. Turn the handle 4 to the horizontal bar hole 11, lift the pressure cylinder 3 upward by hand, confirm that the clamping groove 13 on the puller cylinder 5 is clamped with the bearing inner ring 9, start the hydraulic cylinder, and the puller cylinder 5 moves upward with the hydraulic cylinder body 6, and the bearing inner ring 9 is immediately pulled out, and then rotate the handle 4 on the pressure cylinder 3 to the vertical bar hole 10, pull the handle 4 upward, release the pressure applied by the pressure cylinder 3 to the puller cylinder 5, and the clamping plate 12 on the puller cylinder 5 is separated from the bearing inner ring 9.
[0031] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.
Claims
1. A gas turbine rolling bearing inner ring puller in a narrow space, characterized in that: It comprises a top plate (2), a puller barrel (5), a pressure barrel (3) and a hydraulic cylinder. The hydraulic cylinder is inserted upside down into the puller barrel (5). The hydraulic cylinder body (6) passes through the top of the puller barrel (5) and is fixedly connected to the puller barrel (5). The top plate (2) is placed in the puller barrel (5). The bottom end of the top plate (2) abuts against the top end of the shaft neck (1). The top end of the top plate (2) is detachably connected to the end of the hydraulic cylinder output shaft (7). The pressure barrel (3) is placed between the top plate (2) and the puller barrel (5). The puller barrel (5) and the pressure barrel (3) are sleeved on the outer periphery of the shaft neck (1). The lower part of the puller cylinder (5) comprises a plurality of clamping plates (12), which are arranged at intervals and form a cylindrical shape, and the bottom of the clamping plates (12) is provided with a clamping groove (13) inwardly corresponding to the inner ring of the bearing (9); the upper part of the pressure cylinder (3) is provided with a handle (4), and the handle (4) and the pressure cylinder (3) are detachably provided; the upper wall of the puller cylinder (5) is symmetrically provided with vertical bar holes (10), and the handle (4) is provided through the vertical bar holes (10).
2. The inner ring puller for rolling bearing of a gas turbine in a narrow space according to claim 1, characterized in that: A transverse hole (11) is arranged on the upper wall of the puller tube (5), and the transverse hole (11) is connected to the vertical hole (10) to form an L-shape.
3. The inner ring puller for rolling bearing of a gas turbine in a narrow space according to claim 1, characterized in that: A second threaded hole is arranged on the upper part of the pressure cylinder (3), an external thread is arranged at the connection end between the handle (4) and the pressure cylinder (3), and the handle (4) passes through the second threaded hole and is connected to the pressure cylinder (3) by means of threads.
4. The inner ring puller for rolling bearing of a gas turbine in a narrow space according to claim 3, characterized in that: The number of the handles (4) is at least two and they are evenly distributed on the outer circumference of the pressure cylinder (3), and the number of the second threaded holes is consistent with the number of the handles (4).
5. The inner ring puller for rolling bearing of a gas turbine in a narrow space according to claim 1, characterized in that: A first threaded hole is arranged at the top of the puller tube (5), a thread is arranged on the outer periphery of the hydraulic cylinder body (6) close to the output shaft, and the hydraulic cylinder body (6) passes through the first threaded hole and is connected to the first threaded hole by threads.
6. The inner ring puller for rolling bearing of a gas turbine in a narrow space according to any one of claims 1 to 5, characterized in that: It also includes a nut (8) which passes through the middle of the top plate (2) and is provided with a connecting hole corresponding to the output end of the hydraulic cylinder. A third threaded hole is provided inwardly at the end of the hydraulic cylinder output shaft (7). The nut (8) passes through the connecting hole and the third threaded hole in sequence to connect the top plate (2) to the hydraulic cylinder output shaft (7).