Positioning and pressing clamp special for turbine nozzle ring pressing pin
By designing a special positioning and pressing fixture for turbine nozzle ring pressing pins, and utilizing the cooperation of the push ring assembly and positioning tooling, the problem of unstable turbine nozzle ring pressing pins was solved, realizing automated pressing, reducing the defect rate and improving machining accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN HUAPEI POWER TECH CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-21
AI Technical Summary
In the absence of stable fixtures and tooling, existing turbine nozzle ring pressing pins are difficult to press into place stably, resulting in a high defect rate.
A special positioning and pressing fixture for turbine nozzle ring pressing pins has been designed, including a push ring assembly, a positioning fixture and a pressing pin cylinder. Through the cooperation of the push ring assembly and the positioning fixture, and by using structures such as vacuum suction cups, alignment blocks and snap-fit blocks, the turbine nozzle ring is ensured not to shift or deflect during the pressing pin process, thus achieving automated pressing.
This improved processing efficiency, reduced the defect rate, ensured that the turbine nozzle ring was not damaged during the pressing process, and improved processing accuracy and reliability.
Smart Images
Figure CN224526436U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of turbine nozzle ring pressing pin technology, specifically a special positioning and pressing clamp for turbine nozzle ring pressing pin. Background Technology
[0002] The turbine nozzle ring is a core component of a turbine, typically located in front of the turbine impeller. It is a key structure connecting the combustion chamber and the turbine rotor. In equipment such as aero engines, gas turbines, and automotive turbochargers, the design precision of the turbine nozzle ring directly affects turbine efficiency, impacting the power output, fuel economy, and reliability of the power unit. It is a crucial element in improving the overall performance of the machine. The turbine nozzle ring pressure pin is a key fastening component used to fix the nozzle ring blades to the inner and outer rings. It plays a core positioning role in the high-temperature and high-pressure turbine working environment. It is usually a cylindrical or stepped metal pin that fastens the dispersed blades and the ring body into a whole, ensuring that the blades maintain the design angle under the impact of high-speed airflow and preventing loosening or displacement that would lead to aerodynamic performance degradation.
[0003] Existing turbine nozzle ring pressing pins are often manually pressed into the pre-drilled holes of the turbine nozzle ring using pressing tools. In actual operation, due to the lack of stable fixtures, it is impossible to guarantee that the metal pins are pressed into the pre-drilled holes stably, and the pressing pins may not be in place, resulting in a high defect rate. To address this, we propose a special positioning and pressing fixture for turbine nozzle ring pressing pins. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a dedicated positioning and pressing fixture for turbine nozzle ring pressing pins, thereby solving the problems mentioned in the background.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a special positioning and pressing fixture for turbine nozzle ring pressing pins, comprising a push ring assembly, a positioning fixture, and a pressing pin cylinder, as well as a right bracket, a left bracket, and a top bracket for fixing the push ring assembly, the positioning fixture, and the pressing pin cylinder. A turbine nozzle ring is provided between the push ring assembly and the positioning fixture. The turbine nozzle ring has nozzle blades installed in a ring at equal intervals on the side near the positioning fixture. A base is provided at the lower part of the right bracket and the left bracket, and both are fixedly connected to the base by bolts. The push ring assembly is fixedly connected to the movable end of the push ring cylinder. The pressing pin cylinder is fixedly connected to the top bracket. The movable end of the pressing pin cylinder passes through the top bracket and is fixedly installed with a pressing pin rod. A pressing pin head is fixedly installed at the end of the pressing pin rod away from the pressing pin cylinder.
[0008] Preferably, the push ring assembly includes a push ring frame, three ear seats are fixedly installed on the outer side of the push ring frame, a vacuum suction cup is fixedly installed on the outer side of the push ring frame through the ear seats, a guide frame is fixedly installed on the lower part of the push ring frame, sliders are fixedly installed at both ends of the lower part of the guide frame, the sliders are sleeved on the outer side of the guide rail, and the push ring frame has a first alignment block installed in a ring at equal intervals on the side facing the positioning fixture;
[0009] The positioning fixture includes an outer positioning ring and an inner positioning ring. Both the outer positioning ring and the inner positioning ring are fixedly connected to the left bracket by bolts. The outer positioning ring has a first blade locking block, a second blade locking block and a third blade locking block fixedly installed on the side facing the push ring assembly. The inner positioning ring has a second alignment block installed in a ring at equal intervals on the side facing the push ring assembly.
[0010] The above technical solution, through the cooperation of the push ring assembly and the positioning fixture, can fix the turbine nozzle ring, ensuring that the turbine nozzle ring will not shift during the pressing process, without the need for manual intervention, thereby improving processing efficiency and reducing the defect rate.
[0011] Preferably, the connection between the positioning fixture and the left support is provided with a first fixing seat and a second fixing seat. The cross-section of the first fixing seat is "L" shaped and the cross-section of the second fixing seat is "I" shaped. Both the first fixing seat and the second fixing seat are in contact with the outer positioning ring. Both the first fixing seat and the second fixing seat are fixedly connected to the left support by bolts.
[0012] Through the above technical solution, the design of the first and second fixed seats can support the connection between the positioning fixture and the left bracket, ensuring that it will not shift due to its own weight, thus avoiding damage to the nozzle blades of the turbine nozzle ring caused by the displacement of the positioning fixture.
[0013] Preferably, the ear seat and the vacuum suction cup are provided with three identical ones, and two adjacent vacuum suction cups are distributed at a 90° angle. The vacuum suction cup extends to the outside of the push ring frame, and the vacuum suction cup is adsorbed to the turbine nozzle ring.
[0014] The above technical solution uses three vacuum suction cups distributed at 90° angles to firmly attach the turbine nozzle ring to the outside of the push ring assembly. Combined with the push ring cylinder and its lower guide frame, slider and guide rail, it can achieve smooth pushing and pressing, effectively avoiding abnormal alignment of the turbine nozzle ring.
[0015] Preferably, there are multiple identical first and second alignment blocks, and the cross-sections of the multiple first and second alignment blocks are all "C" shaped. The first and second alignment blocks are in contact connection, and the opposite surfaces of the first and second alignment blocks are covered with rubber sleeves.
[0016] Through the above technical solution, the design of the first alignment block and the second alignment block can limit the movement of the push ring assembly, ensuring that the turbine nozzle ring is engaged in the positioning fixture and preventing damage to the turbine nozzle ring due to excessive thrust. In addition, the rubber sleeves covering the opposing surfaces of the first alignment block and the second alignment block can act as a buffer.
[0017] Preferably, the contact portions of the first blade locking block, the second blade locking block, and the third blade locking block with the nozzle blade are all designed with an arc shape. The first blade locking block and the second blade locking block are adapted to the concave surface of the nozzle blade, and the third blade locking block is adapted to the convex surface of the nozzle blade.
[0018] The above technical solution, through the design of the first blade locking block, the second blade locking block and the third blade locking block, can lock the nozzle blades on the outside of the turbine nozzle ring, ensuring that they will not deflect during the pressing process.
[0019] Preferably, the pin-pressing cylinder, pin-pressing rod, and pin-pressing head are located directly above the positioning fixture, and the pin-pressing rod is slidably connected to the top bracket.
[0020] Through the above technical solution, the movable end of the pressing cylinder transmits power to the pressing head through the pressing rod, and the pressing head performs the pressing operation on the turbine nozzle ring.
[0021] Compared with the prior art, this utility model provides a special positioning and pressing fixture for turbine nozzle ring pressing pins, which has the following advantages:
[0022] 1. This turbine nozzle ring pressing pin special positioning and pressing fixture is equipped with a horizontally movable push ring assembly and a fixedly installed positioning fixture. Through the cooperation of the push ring assembly and the positioning fixture, the two firmly clamp the turbine nozzle ring. With the help of the pressing pin cylinder, pressing pin rod and pressing pin head, the pressing pin operation is performed without manual intervention, which improves processing efficiency and reduces the defect rate.
[0023] 2. This turbine nozzle ring clamping pin special positioning and pressing fixture, through the design of the first blade clamping block, the second blade clamping block and the third blade clamping block, can clamp the nozzle blade on the outside of the turbine nozzle ring, ensuring that it will not deflect during the pressing process. The design of the first alignment block and the second alignment block can limit the push ring assembly, which can not only ensure that the turbine nozzle ring is clamped in the positioning fixture, but also avoid damage to the turbine nozzle ring due to excessive thrust. In addition, the rubber sleeves covering the opposing parts of the first alignment block and the second alignment block can play a buffering role, making it highly practical. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;
[0025] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;
[0026] Figure 3 This is a schematic diagram of the disassembled structure of the push ring assembly and positioning tooling of this utility model;
[0027] Figure 4 This is a schematic diagram of the installation structure of the push ring assembly and the right bracket of this utility model;
[0028] Figure 5 This is a schematic diagram of the turbine nozzle ring mounting structure of this utility model;
[0029] Figure 6 This is a schematic diagram of the disassembled structure of the turbine nozzle ring and positioning fixture of this utility model. Figure 1 ;
[0030] Figure 7 This is a schematic diagram of the disassembled structure of the turbine nozzle ring and positioning fixture of this utility model. Figure 2 ;
[0031] Figure 8 This is a schematic diagram of the cross-sectional structure of this utility model;
[0032] Figure 9 This is a schematic diagram of the positioning tooling installation structure of this utility model;
[0033] Figure 10 This is a schematic diagram of the installation structure of the turbine nozzle ring and thrust ring assembly of this utility model;
[0034] Figure 11 This is a schematic diagram of the disassembled structure of the outer positioning ring and turbine nozzle ring of this utility model. Figure 1 ;
[0035] Figure 12 This is a schematic diagram of the three-dimensional structure of the outer positioning ring of this utility model.
[0036] The components are as follows: 1. Base; 2. Right bracket; 3. Push ring cylinder; 4. Push ring assembly; 401. Push ring frame; 402. Ear seat; 403. Vacuum suction cup; 404. Guide frame; 405. Slider; 406. Guide rail; 407. First alignment block; 5. Left bracket; 6. Top bracket; 7. Pressing pin cylinder; 8. Pressing pin rod; 9. Pressing pin head; 10. First fixed seat; 11. Second fixed seat; 12. Positioning fixture; 1201. Outer positioning ring; 1202. Inner positioning ring; 1203. Second alignment block; 1204. First blade locking block; 1205. Second blade locking block; 1206. Third blade locking block; 13. Turbine nozzle ring; 14. Nozzle blade. Detailed Implementation
[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0038] Example 1:
[0039] like Figures 1-12 As shown, the present invention provides a special positioning and pressing fixture for turbine nozzle ring pressing pins, including a push ring assembly 4, a positioning fixture 12, and a pressing pin cylinder 7, as well as a right bracket 2, a left bracket 5, and a top bracket 6 for fixing the push ring assembly 4, the positioning fixture 12, and the pressing pin cylinder 7. A turbine nozzle ring 13 is provided between the push ring assembly 4 and the positioning fixture 12. The turbine nozzle ring 13 has nozzle blades 14 installed in a ring at equal intervals on the side near the positioning fixture 12. A base 1 is provided at the lower part of the right bracket 2 and the left bracket 5. Both are fixedly connected to the base 1 by bolts. The push ring assembly 4 is fixedly connected to the movable end of the push ring cylinder 3. The pressing pin cylinder 7 is fixedly connected to the top bracket 6. The movable end of the pressing pin cylinder 7 passes through the top bracket 6 and is fixedly installed with a pressing pin rod 8. A pressing pin head 9 is fixedly installed at the end of the pressing pin rod 8 away from the pressing pin cylinder 7.
[0040] Specifically, the push ring assembly 4 includes a push ring frame 401, three lugs 402 are fixedly mounted on the outer side of the push ring frame 401, a vacuum suction cup 403 is fixedly mounted on the outer side of the push ring frame 401 through the lugs 402, a guide frame 404 is fixedly mounted on the lower part of the push ring frame 401, sliders 405 are fixedly mounted on both ends of the lower part of the guide frame 404, the sliders 405 are sleeved on the outer side of the guide rail 406, and the push ring frame 401 has a first alignment part installed in a ring at equal intervals on the side facing the positioning fixture 12. Block 407; The positioning fixture 12 includes an outer positioning ring 1201 and an inner positioning ring 1202. Both the outer positioning ring 1201 and the inner positioning ring 1202 are fixedly connected to the left bracket 5 by bolts. On the side of the outer positioning ring 1201 facing the push ring assembly 4, a first blade locking block 1204, a second blade locking block 1205, and a third blade locking block 1206 are fixedly installed. On the side of the inner positioning ring 1202 facing the push ring assembly 4, there are second alignment blocks 1203 installed in a ring at equal intervals. The advantage is that, through the cooperation of the push ring assembly 4 and the positioning fixture 12, the turbine nozzle ring 13 can be fixed, ensuring that the turbine nozzle ring 13 will not shift during the pressing process, without the need for manual intervention, thus improving processing efficiency and reducing the defect rate.
[0041] Example 2:
[0042] like Figures 2-12 As shown, as an improvement on the previous embodiment, in order to accurately push the turbine nozzle ring 13 into the positioning fixture 12, a first fixing seat 10 and a second fixing seat 11 are provided at the connection between the positioning fixture 12 and the left support 5. The first fixing seat 10 has an "L"-shaped cross-section, and the second fixing seat 11 has an "I"-shaped cross-section. Both the first fixing seat 10 and the second fixing seat 11 are in contact with the outer positioning ring 1201, and both the first fixing seat 10 and the second fixing seat 11 are fixedly connected to the left support 5 by bolts. The advantage is that the design of the first fixing seat 10 and the second fixing seat 11 can support the connection between the positioning fixture 12 and the left support 5, ensuring that it will not shift due to its own weight, and avoiding damage to the nozzle blade 14 of the turbine nozzle ring 13 due to the displacement of the positioning fixture 12.
[0043] Example 3:
[0044] like Figures 2-12As shown, as an improvement over the previous embodiment, to achieve accurate alignment, the lug 402 and the vacuum suction cup 403 are each provided with three identical ones. Two adjacent vacuum suction cups 403 are distributed at a 90° angle. The vacuum suction cups 403 extend to the outside of the push ring frame 401, and are adsorbed onto the turbine nozzle ring 13. The advantage is that the three vacuum suction cups 403 distributed at 90° angles can firmly adhere the turbine nozzle ring 13 to the outside of the push ring assembly 4. Combined with the push ring cylinder 3 and its lower guide frame 404, slider 405, and guide rail 406, they can smoothly push and press the ring, effectively preventing abnormal alignment of the turbine nozzle ring 13.
[0045] Example 4:
[0046] like Figures 2-12 As shown, as an improvement on the previous embodiment, to provide cushioning for the push ring assembly 4 and the positioning fixture 12, multiple identical first alignment blocks 407 and second alignment blocks 1203 are provided. The cross-sections of these multiple first alignment blocks 407 and second alignment blocks 1203 are all C-shaped. The first alignment blocks 407 and second alignment blocks 1203 are in contact connection, and their opposing surfaces are covered with rubber sleeves. The advantage is that the design of the first alignment blocks 407 and second alignment blocks 1203 can limit the push ring assembly 4, ensuring that the turbine nozzle ring 13 is engaged in the positioning fixture 12 and preventing damage to the turbine nozzle ring 13 due to excessive thrust. Furthermore, the rubber sleeves covering the opposing surfaces of the first alignment blocks 407 and second alignment blocks 1203 provide cushioning.
[0047] Example 5:
[0048] like Figures 2-12 As shown, as an improvement on the previous embodiment, to ensure that deflection does not occur during the pressing process, the contact portions of the first blade retaining block 1204, the second blade retaining block 1205, and the third blade retaining block 1206 with the nozzle blade 14 are all designed with an arc shape. The first blade retaining block 1204 and the second blade retaining block 1205 are adapted to the concave surface of the nozzle blade 14, and the third blade retaining block 1206 is adapted to the convex surface of the nozzle blade 14. The advantage is that, through the design of the first blade retaining block 1204, the second blade retaining block 1205, and the third blade retaining block 1206, the nozzle blade 14 on the outer side of the turbine nozzle ring 13 can be held in place, ensuring that it will not deflect during the pressing process.
[0049] Specifically, the pin-pressing cylinder 7, the pin-pressing rod 8, and the pin-pressing head 9 are located directly above the positioning fixture 12, and the pin-pressing rod 8 is slidably connected to the top bracket 6. The advantage is that the moving end of the pin-pressing cylinder 7 transmits power to the pin-pressing head 9 through the pin-pressing rod 8, and the pin-pressing head 9 performs the pin-pressing operation on the turbine nozzle ring 13.
[0050] Working principle: During use, an external robotic arm places the turbine nozzle ring 13 in front of the push ring assembly 4. The vacuum suction cup 403 on the side of the push ring assembly 4 facing the positioning fixture 12 adsorbs and grips the turbine nozzle ring 13. After the turbine nozzle ring 13 is gripped, the movable end of the push ring cylinder 3 pushes the push ring assembly 4 towards the positioning fixture 12. During the movement, the slider 405 and the guide rail 406 guide the guide frame 404 and the push ring frame 401. When the nozzle blade 14 on the outer side of the turbine nozzle ring 13 is fully engaged with the first blade engaging block... After the second blade locking block 1204 and the third blade locking block 1205 are connected, the first alignment block 407 and the second alignment block 1203 collide and abut against each other. The rubber sleeves covering the outside of the first alignment block 407 and the second alignment block 1203 can play a buffering role. The pin pressing cylinder 7 presses the pin completely into the turbine nozzle ring 13 through the pin pressing rod 8 and the pin pressing head 9, thus completing the assembly. After the assembly is completed, the push ring cylinder 3 drives the push ring assembly 4 to push back. The external robot removes the turbine nozzle ring 13 and inserts a new turbine nozzle ring 13 to repeat the above operation.
[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A special positioning and pressing fixture for turbine nozzle ring pressing pins, comprising a push ring assembly (4), a positioning fixture (12), and a pressing pin cylinder (7), and a right bracket (2), a left bracket (5), and a top bracket (6) for fixing the push ring assembly (4), the positioning fixture (12), and the pressing pin cylinder (7), characterized in that: A turbine nozzle ring (13) is provided between the push ring assembly (4) and the positioning fixture (12). The turbine nozzle ring (13) has nozzle blades (14) installed in a ring at equal intervals on the side near the positioning fixture (12). The lower part of the right bracket (2) and the left bracket (5) is provided with a base (1). Both are fixedly connected to the base (1) by bolts. The push ring assembly (4) is fixedly connected to the movable end of the push ring cylinder (3). The pin-pressing cylinder (7) is fixedly connected to the top bracket (6). The movable end of the pin-pressing cylinder (7) passes through the top bracket (6) and is fixedly installed with a pin-pressing rod (8). The end of the pin-pressing rod (8) away from the pin-pressing cylinder (7) is fixedly installed with a pin-pressing head (9).
2. The turbine nozzle ring pressing pin special positioning clamp according to claim 1, characterized in that: The push ring assembly (4) includes a push ring frame (401), three ear seats (402) are fixedly installed on the outside of the push ring frame (401), a vacuum suction cup (403) is fixedly installed on the outside of the push ring frame (401) through the ear seats (402), a guide frame (404) is fixedly installed on the lower part of the push ring frame (401), and sliders (405) are fixedly installed at both ends of the lower part of the guide frame (404). The sliders (405) are sleeved on the outside of the guide rail (406), and the push ring frame (401) has a first alignment block (407) installed in a ring at equal intervals on the side facing the positioning fixture (12). The positioning fixture (12) includes an outer positioning ring (1201) and an inner positioning ring (1202). Both the outer positioning ring (1201) and the inner positioning ring (1202) are fixedly connected to the left bracket (5) by bolts. The outer positioning ring (1201) has a first blade locking block (1204), a second blade locking block (1205) and a third blade locking block (1206) fixedly installed on the side facing the push ring assembly (4). The inner positioning ring (1202) has a second alignment block (1203) installed in a ring at equal intervals on the side facing the push ring assembly (4).
3. The turbine nozzle ring pressing pin special positioning clamp according to claim 1, characterized in that: The positioning fixture (12) and the left bracket (5) are provided with a first fixed seat (10) and a second fixed seat (11). The first fixed seat (10) has an "L" shaped cross section and the second fixed seat (11) has an "I" shaped cross section. Both the first fixed seat (10) and the second fixed seat (11) are in contact with the outer positioning ring (1201). Both the first fixed seat (10) and the second fixed seat (11) are fixedly connected to the left bracket (5) by bolts.
4. A special positioning and pressing fixture for turbine nozzle ring pressing pins according to claim 2, characterized in that: The ear seat (402) and the vacuum suction cup (403) are each provided with three identical ones. Two adjacent vacuum suction cups (403) are distributed at a 90° angle. The vacuum suction cup (403) extends to the outside of the push ring frame (401). The vacuum suction cup (403) and the turbine nozzle ring (13) are connected by adsorption.
5. A special positioning and pressing fixture for turbine nozzle ring pressing pins according to claim 2, characterized in that: The first alignment block (407) and the second alignment block (1203) are provided in multiple identical quantities. The cross-sections of the multiple first alignment blocks (407) and second alignment blocks (1203) are all in a "C" shape. The first alignment blocks (407) and the second alignment blocks (1203) are in contact connection. The opposite surfaces of the first alignment blocks (407) and the second alignment blocks (1203) are covered with rubber sleeves.
6. A special positioning and pressing fixture for turbine nozzle ring pressing pins according to claim 2, characterized in that: The contact portions of the first blade locking block (1204), the second blade locking block (1205), and the third blade locking block (1206) with the nozzle blade (14) are all designed with an arc shape. The first blade locking block (1204) and the second blade locking block (1205) are adapted to the concave surface of the nozzle blade (14), and the third blade locking block (1206) is adapted to the convex surface of the nozzle blade (14).
7. A special positioning and pressing fixture for turbine nozzle ring pressing pins according to claim 1, characterized in that: The pin-pressing cylinder (7), pin-pressing rod (8) and pin-pressing head (9) are located directly above the positioning fixture (12), and the pin-pressing rod (8) is slidably connected to the top bracket (6).