Valve seat ring assembling and positioning device for gas turbine cylinder head

Abstract

The utility model discloses a valve seat ring assembling and positioning device for a gas turbine cylinder head, which belongs to the technical field of gas turbine cylinder head maintenance and comprises a fixing plate, a positioning column matched with a cylinder head valve hole is arranged on the fixing plate, and a spring clamping strip is axially arranged on the side face of the positioning column. The positioning column is provided with a containing groove corresponding to the spring clamping strip, the bent section can be contracted into the containing groove when pressed, the positioning column is sleeved with the valve seat ring, the bent section can abut against the surface of the valve seat ring, and in the installation process, it is guaranteed that the valve seat ring and a cylinder head valve hole are coaxial, so that the sealing performance of the valve seat ring is improved. The end cap and the check block are matched to enable the positioning column to slide in the strip-shaped hole, so that the deviation of the position of the cylinder head valve hole is overcome, the position of the positioning column is locked through the positioning bolt, the sliding rods are arranged on the cylinder head valve hole, the fixing disc and the base plate, the linkage between the positioning reference and the cylinder head valve hole is improved, and the positioning accuracy is improved. The expansion directions of the fixed disc and the base plate are ensured.

Description

Technical Field

[0001] This utility model belongs to the field of gas turbine cylinder head repair technology, specifically relating to a valve seat assembly and positioning device for gas turbine cylinder heads. Background Technology

[0002] As a key component controlling gas exchange, the cylinder head of an internal combustion engine in a gas generator directly affects the engine's efficiency and reliability through the sealing performance of its valve seats. The valve seats are installed within the valve seat bores of the cylinder head and must maintain a tight seal between the valve and the cylinder head under complex conditions of high temperature, high pressure, and high-frequency mechanical impact. However, valve seat installation and maintenance primarily rely on manual positioning followed by hammering, which requires a high level of operational experience and lacks precise positioning references.

[0003] Traditional assembly methods have the following main problems: Firstly, because maintenance personnel cannot quickly determine the coaxiality of the valve seat and cylinder head mounting holes, the parallelism deviation between the seat mounting plane and the cylinder head reference surface exceeds design requirements. This further leads to uneven stress on the seat during hammering and pressing, causing damage such as edge chipping and sealing surface deformation. Secondly, the repeated adjustments to the positioning process result in a single cylinder head assembly taking 40-60 minutes, severely impacting maintenance efficiency.

[0004] Currently, although some mechanical positioning tools exist on the market, they generally adopt a rigid positioning structure with a fixed height. This cannot accommodate the positional deviations of the mounting holes caused by machining tolerances in different cylinder head models. Furthermore, the fit accuracy between the positioning datum and the cylinder head bolt holes is insufficient, making it difficult to meet the high sealing requirements of gas generator assembly. Therefore, there is an urgent need to design a positioning device that combines adjustability and high precision to solve the problems of inaccurate positioning and installation damage during valve seat assembly. Utility Model Content

[0005] To address the problems existing in the background art, this utility model provides a valve seat ring assembly and positioning device for gas turbine cylinder heads.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a valve seat assembly and positioning device for a gas turbine cylinder head, comprising a fixing plate, a positioning post matching the cylinder head valve hole provided on the fixing plate, a spring retainer arranged axially on the side of the positioning post, and a receiving groove corresponding to the spring retainer provided on the positioning post. The valve seat is fixed to the positioning post by the spring retainer. The positioning post is pressed into the cylinder head valve hole by external force pressing down on the fixing plate. At the same time, the spring retainer is deformed and contracted into the receiving groove by the pressure of the inner wall of the cylinder head valve hole, thus assembling the valve seat into the cylinder head valve hole.

[0007] As a further supplement to the above technical solution, the spring clip includes a fixed section, a bent section, and a clip head section. The bent section is fixed in the receiving groove by the fixed section, and the clip head section is fixed at the free end of the bent section. The elasticity of the bent section is used to limit and fix the valve seat ring on the positioning post.

[0008] As a further supplement to the above technical solution, a strip-shaped hole is provided in the fixing plate, and an end cap and a stop block are respectively provided on the positioning post, and the two cooperate to slide the positioning post in the strip-shaped hole.

[0009] As a further supplement to the above technical solution, positioning bolts are provided on both sides of the end cap, and positioning grooves are provided on the fixing plates located on both sides of the strip hole. The positioning bolts lock the positioning pins onto the fixing plates by rotating and abutting against the positioning grooves.

[0010] As a further supplement to the above technical solution, it also includes a pad and two sliding rods. The pad has a through hole and a first insertion hole connected to it. The two ends of the sliding rods are respectively provided with an end and a second insertion hole. The fixed plate is symmetrically provided with auxiliary ear holes. The two sliding rods pass through the screw hole, auxiliary ear hole and through hole of the gas turbine cylinder head in sequence and are inserted into the first insertion hole and the second insertion hole through a pin to connect the fixed plate and the pad. A jack is provided between the fixed plate and the pad. The jack presses the fixed plate toward the gas turbine cylinder head with the cooperation of the pad.

[0011] As a further explanation and limitation of the above technical solution, a support is provided at the center of the fixed plate, and at least two positioning blocks are provided on the support for fixing the base of the jack.

[0012] As a further supplement to the above technical solution, multiple reinforcing ribs are radially arranged around the center of the fixing plate. The reinforcing ribs are distributed in a cross pattern with the strip holes. The reinforcing ribs are used to enhance the overall structural strength of the fixing plate and prevent deformation during the pressing process.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. This utility model distributes positioning pins evenly on a fixed plate, and arranges multiple spring clips axially on each positioning pin. The valve seat ring is fitted onto the positioning pin using the clip head section of the spring clip. During the process of pressing the positioning pin into the cylinder head valve hole, the valve seat ring is coaxially assembled into the cylinder head valve hole. This solves the problem of coaxiality between the valve seat ring and the cylinder head mounting hole, and also solves the problem of long assembly time for a single cylinder head and serious impact on maintenance efficiency in the traditional assembly method.

[0015] 2. This utility model, through the cooperation of the end cap and the stop block, allows the position of the positioning pin to be slidably adjusted, accommodating the positional deviation of the mounting holes caused by machining tolerances in different cylinder head models. Simultaneously, the positioning bolts lock the position of the positioning pin, preventing it from shifting during installation and meeting the high sealing requirements of the gas generator assembly.

[0016] 3. This utility model adds a pad, a sliding rod, and a matching pin, which, together with the use of a jack, makes the entire assembly process simple, greatly shortens the assembly time of a single cylinder head, and improves maintenance efficiency.

[0017] 4. This utility model adds a reinforcing rib design to the fixing plate, which further improves the load-bearing capacity and deformation resistance of the fixing plate, ensuring that all positioning columns remain stable during high-pressure assembly. This effectively avoids the decrease in assembly accuracy caused by structural deformation, and can also solve the damage problems such as edge cracking and sealing surface deformation caused by uneven force on the seat ring during press-fitting in traditional assembly. Attached Figure Description

[0018] Figure 1 A perspective view of the valve seat ring assembly and positioning device for the cylinder head of this utility model;

[0019] Figure 2 This is a structural diagram of the spring clip according to an embodiment of the present utility model;

[0020] Figure 3 This is an exploded view of the fixing plate, positioning post, and positioning bolts in an embodiment of this utility model;

[0021] Figure 4 This is a cross-sectional view of an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram showing the assembly of the pad, slide bar, and fixing plate in an embodiment of this utility model;

[0023] Figure 6 for Figure 5 Exploded view of the structure at point A.

[0024] In the diagram: 1. Fixing plate; 101. Strip hole; 102. Positioning groove; 103. Support; 104. Positioning block; 105. Reinforcing rib; 2. Positioning post; 201. End cap; 202. Stop block; 3. Spring clip; 301. Fixing section; 302. Bending section; 303. Clip section; 4. Receiving groove; 5. Positioning bolt; 6. Pad; 601. Through hole; 602. First insertion hole; 7. Slide rod; 701. End; 702. Second insertion hole; 8. Auxiliary ear hole; 9. Pin; 10. Jack. Detailed Implementation

[0025] To further illustrate the technical solution of this utility model, the following description is in conjunction with the appendix. Figures 1 to 6 The present invention will be further described in detail through three embodiments. Example 1

[0026] As attached Figures 1 to 2 As shown, this embodiment provides a valve seat assembly and positioning device for a gas turbine cylinder head. The device mainly includes a fixing plate 1 and a positioning post 2. A positioning post 2, matching the cylinder head valve bore, is provided on the fixing plate 1. A spring retainer 3 is axially arranged on the side of the positioning post 2, and a corresponding receiving groove 4 is provided on the positioning post 2. The spring retainer 3 consists of a fixed section 301, a bent section 302, and a retaining head section 303. The bent section 302 is fixed in the receiving groove 4 by the fixed section 301, and the retaining head section 303 is fixed to the free end of the bent section 302. The retaining head section 303 uses the elasticity of the bent section 302 to limit and fix the valve seat on the positioning post 2. The positioning post 2 is pressed into the cylinder head valve bore by external force pressing down on the fixing plate 1. Simultaneously, the spring retainer 3 is deformed and contracted into the receiving groove 4 by the pressure of the inner wall of the cylinder head valve bore, thus assembling the valve seat into the cylinder head valve bore.

[0027] In this embodiment, multiple reinforcing ribs 105 are radially arranged on the fixing plate 1 with its center. The reinforcing ribs 105 are distributed in a cross pattern with the strip holes 101. The reinforcing ribs 105 are used to enhance the overall structural strength of the fixing plate 1 and prevent deformation during the pressing process. Example 2

[0028] As attached Figure 3 and attached Figure 4 As shown, based on Embodiment 1, to accommodate the deviation in mounting hole position caused by machining tolerances in different cylinder head models, a strip-shaped hole 101 is provided on the fixing plate 1. Additionally, an end cap 201 and a stop block 202 are respectively provided on the positioning post 2. The end cap 201 and the stop block 202 cooperate to slide the positioning post 2 in the strip-shaped hole 101, increasing the flexibility of the positioning post 2. Positioning bolts 5 are provided on both sides of the end cap 201, and positioning grooves 102 are provided on the fixing plate 1 on both sides of the strip-shaped hole 101. After rotation, the positioning bolts 5 can abut against the positioning grooves 102, thereby locking the position of the positioning post 2 on the fixing plate 1. Example 3

[0029] As attached Figure 5 and attached Figure 6As shown, to improve maintenance efficiency and reduce the labor intensity of maintenance personnel, we have added the following auxiliary mechanisms. The specific scheme is as follows: This assembly positioning device also includes a pad 6 and two sliding rods 7. The pad 6 has a through hole 601 and a first insertion hole 602 connected to it. The two ends of the sliding rods 7 are respectively provided with an end 701 and a second insertion hole 702. Auxiliary ear holes 8 are symmetrically arranged on the fixed plate 1. Simultaneously, a support 103 is provided at the center of the fixed plate 1, and at least two positioning blocks 104 are provided on the support 103. Furthermore, a jack 10 is provided between the fixed plate 1 and the pad 6.

[0030] Its usage and working principle:

[0031] Before use, the maintenance personnel slide the positioning pin 2 in the strip hole 101 according to the measured position of the cylinder head valve hole, so that it fits the position of the cylinder head valve hole. After adjustment, rotate the positioning bolt 5 so that it abuts against the positioning groove 102 to lock the position of the positioning pin 2. Then, put the valve seat ring on the positioning pin 2. At this time, the bent section 302 of the spring clip 3 is first squeezed and contracted into the receiving groove 4 by the valve seat ring, and then pops out by its own elasticity. The clip section 303 abuts against the valve seat ring, completing the installation of the valve seat ring on the positioning pin 2. Next, place the fixing plate 1 on the cylinder head, ensuring that the auxiliary ear hole 8 is aligned with the screw hole of the gas turbine cylinder head and the positioning pin 2 is aligned with the cylinder head valve hole. Pass the sliding rod 7 through the screw hole of the gas turbine cylinder head, the auxiliary ear hole 8 and the through hole 601 on the pad 6 in sequence, and then insert the pin 9 into the first insertion hole 602 and the second insertion hole 702 to connect the fixing plate 1 and the pad 6. Place the jack 10 inside the positioning block 104, and activate the jack 10 to widen the gap between the fixing plate 1 and the pad 6 until the slide rod 7 can no longer rise. Finally, apply downward pressure to the fixing plate 1 to press the positioning pin 2 into the cylinder head valve hole, completing the valve seat assembly. After assembly, the spring clip 3 moves out of the cylinder head valve hole along with the positioning pin 2.

[0032] This device utilizes the elastic limiting effect of the spring clip 3 to ensure the stable installation of the valve seat ring on the locating pin 2, and ensures that the valve seat ring is coaxial with the cylinder head valve bore during installation. Through the sliding of the locating pin 2 within the slotted hole 101 and the locking of the locating bolt 5, the position of the locating pin 2 can be flexibly adjusted and fixed to accommodate different cylinder head valve bore position deviations. The sliding rod 7, the pad 6, and the jack 10 work together, and with the force of the jack 10, the locating pin 2 and the valve seat ring are smoothly pressed into place, thus efficiently and accurately completing the assembly of the valve seat ring within the cylinder head valve bore.

[0033] The foregoing has shown and described the main features and advantages of this utility model. It will be apparent to those skilled in the art that the specific embodiments of this utility model are not limited to the details of the exemplary embodiments described above. Furthermore, without departing from the spirit or essential characteristics of this utility model, the inventive concept and design ideas of this utility model can be implemented in other specific forms, and these should be equivalently included within the protection scope disclosed in the technical solution of this utility model. Therefore, in all respects, the embodiments should be considered exemplary and non-limiting. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included within this utility model.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A valve seat assembly and positioning device for a gas turbine cylinder head, comprising a fixing plate (1), characterized in that: A positioning post (2) matching the cylinder head valve hole is provided on the fixing plate (1). A spring clip (3) is axially arranged on the side of the positioning post (2). A receiving groove (4) corresponding to the spring clip (3) is provided on the positioning post (2). The valve seat ring is fixed on the positioning post (2) by the spring clip (3). The positioning post (2) is pressed into the cylinder head valve hole by the fixing plate (1) under external force. At the same time, the spring clip (3) is deformed and contracted into the receiving groove (4) by the squeezing of the inner wall of the cylinder head valve hole and assembles the valve seat ring into the cylinder head valve hole.

2. The valve seat assembly and positioning device for a gas turbine cylinder head according to claim 1, characterized in that: The spring clip (3) includes a fixed section (301), a curved section (302), and a clip head section (303). The curved section (302) is fixed in the receiving groove (4) by the fixed section (301), and the clip head section (303) is fixed at the free end of the curved section (302). The elasticity of the curved section (302) is used to limit and fix the valve seat ring on the positioning post (2).

3. The valve seat insert assembly positioning device for a cylinder head of a combustion engine according to claim 1, characterized in that: The fixing plate (1) has a strip hole (101), and the positioning post (2) is provided with an end cap (201) and a stop block (202), which cooperate to slide the positioning post (2) in the strip hole (101).

4. The valve seat insert assembly positioning device for a cylinder head of a combustion engine according to claim 3, characterized in that: Positioning bolts (5) are provided on both sides of the end cap (201), and positioning grooves (102) are provided on the fixing plates (1) located on both sides of the strip hole (101). The positioning bolts (5) lock the positioning post (2) onto the fixing plate (1) by rotating and abutting in the positioning grooves (102).

5. A valve seat insert assembly positioning device for a combustion engine cylinder head according to any one of claims 1 to 4, characterized in that: It also includes a pad (6) and two sliding rods (7). The pad (6) is provided with a through hole (601) and a first insertion hole (602) connected thereto. The two ends of the sliding rod (7) are respectively provided with an end (701) and a second insertion hole (702). The fixed plate (1) is symmetrically provided with auxiliary ear holes (8). The two sliding rods (7) pass through the screw hole, auxiliary ear hole (8) and through hole (601) of the gas turbine cylinder head in sequence and are inserted into the first insertion hole (602) and the second insertion hole (702) through the pin (9) to connect the fixed plate (1) and the pad (6). A jack (10) is provided between the fixed plate (1) and the pad (6). The jack (10) presses the fixed plate (1) onto the gas turbine cylinder head with the cooperation of the pad (6).

6. The valve seat ring assembly and positioning device for a gas turbine cylinder head according to claim 5, characterized in that: A support (103) is provided at the center of the fixed plate (1), and at least two positioning blocks (104) are provided on the support (103) for fixing the base of the jack (10).

7. The valve seat insert assembly positioning device for a cylinder head of a combustion engine according to claim 3, characterized in that: Multiple reinforcing ribs (105) are arranged radially around the center of the fixed plate (1). The reinforcing ribs (105) are intersected with the strip holes (101). The reinforcing ribs (105) are used to enhance the overall structural strength of the fixed plate (1) and prevent deformation during the pressing process.

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