A blind cavity assembly device for an engine rotor spring lock ring

Abstract

The present invention discloses a blind cavity assembly device for an engine rotor spring lock ring, comprising a fixed sleeve with an installation shaft disposed therein, the installation shaft being capable of axial movement along the interior of the fixed sleeve and circumferential rotation; a spring lock ring tightening assembly being disposed at the end of the installation shaft, the spring lock ring tightening assembly having driving ends on both sides, one driving end being connected to a first expansion block, and the other driving end being connected to a second expansion block, the first expansion block and the second expansion block being used to cooperate and fix the spring lock ring to be installed. The device disclosed by the present invention replaces the current situation of manually expanding the spring lock ring and inserting it into a deep cavity for blind installation, thereby reducing the difficulty of on-site manual installation and improving assembly efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of engine assembly, and relates to a blind cavity assembly device for a spring lock ring of an engine rotor. Background Art

[0002] An aircraft engine is a highly complex and sophisticated thermal machine that needs to operate under extremely harsh conditions of high temperature, high pressure, and high stress, and withstand alternating stresses such as airflow impact and vibration. Under various forces, the connection between the various engine components must be stable and reliable. Among them, the connection and fixation between the rotor shafts in the rotor system is a key factor affecting the imbalance of the rotor system and is also the basic guarantee for the reliable operation of the engine. In order to meet the assembly requirements of the engine and enable it to have a locking and fixing function, the locking ring is usually designed as a spring-type locking ring. After the parts are assembled, the locking ring is rotated and installed into the annular groove at the end assembly of the locked and fixed part, so that the parts are locked and fixed after assembly, preventing the engine parts from loosening under forces such as vibration, which will affect the engine connection reliability and performance.

[0003] However, the lock ring used to fix the low-pressure rotor connecting nut of a certain type of engine is installed in a deep cavity of about 1.2m, and the inlet size is only The size is only enough for the operator to blindly install it by hand without the help of tooling; and because the lock ring assembly position has a complex structure and a discontinuous ring groove shape, the lock ring is difficult to install. At present, the lock ring assembly process of a certain low-vortex connecting nut is completed manually. The operator needs to use one hand to open the spring-type lock ring with his fingers, so that the lock ring is in a single-turn state, and then manually send the lock ring into the blind cavity. First, rotate the lock ring head into the discontinuous ring groove. When screwing it in, you need to rely on feel to avoid the discontinuous part of the ring groove. If the gesture causes the lock ring head to be installed at the wrong angle or rotated out of the discontinuous groove, the operator needs to remove it and reassemble it until the lock ring is completely installed in the discontinuous ring groove to meet the assembly and use requirements.

[0004] At present, at a certain machine assembly site, when installing the lock ring for locking the low-vortex rotor nut, since the lock ring is assembled in the intermittent ring groove, the lock ring needs to be inserted into the ring groove little by little and completed through 6 intermittent opening parts, and the assembly process is completely carried out in a blind installation state. Before the assembly is completed, the worker's hands always have to be in a state of struggling to open the spring lock ring. It is very difficult to send it into the card slot in the blind cavity that is only 1.5mm wide, and if you are not careful, the spring lock ring will close again, resulting in repeated installation, long assembly cycle, and difficult assembly. It requires high operating skills of the workers, the assembly method is unscientific, and the assembly efficiency is low; there is also a risk of missed inspection after blind installation, which affects the assembly quality.

[0005] See also Figures 1 to 2 When the rotor lock ring of the aircraft engine is assembled in the blind cavity, the free diameter of the outer ring of the spring lock ring 1 is The size of the locking groove of the engine rotor 2 is In order to fit the large-sized spring lock ring 1 into the small-sized locking groove, it is necessary to expand the spring mouth of the spring lock ring 1 in the axial direction in advance, and use the space provided by the intermittent groove on the rotor 2 to screw the spring lock ring 1 into the locking groove. During the spring screwing process, if the rotation lead is too long and the locking groove height is only 1.8mm, the mouth of the spring lock ring 1 will slip out of the locking groove in the next intermittent groove, causing assembly failure. When the mouth of the spring lock ring 1 passes through more than three intermittent grooves in succession, the locking groove of the rotor 2 effectively limits the expansion of the spring lock ring. When the spring lock ring 1 is rotated and installed, the mouth of the spring lock ring 1 will not slip out of the intermittent groove; at the same time, the locking groove radially compresses the spring, causing the diameter of the spring lock ring 1 to deform, ultimately achieving the assembly of the spring lock ring 1 in the locking groove. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems in the prior art that spring lock rings are mainly blindly installed, which is time-consuming and labor-intensive, and that the spring lock rings need to be manually stretched and inserted during assembly, and that the spring lock rings are easily dislodged during assembly, making assembly difficult and the assembly efficiency low. A blind cavity assembly device for an engine rotor spring lock ring is provided.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An engine rotor spring lock ring blind cavity assembly device includes a fixed sleeve, wherein a mounting shaft is provided inside the fixed sleeve, and the mounting shaft can move axially along the inside of the fixed sleeve and can rotate circumferentially;

[0009] A spring lock ring tightening assembly is provided at the end of the installation shaft, and the two sides of the spring lock ring tightening assembly are driving ends, one driving end is connected to the first stretching block, and the other driving end is connected to the second stretching block. The first stretching block and the second stretching block are used to cooperate and fix the spring lock ring to be installed.

[0010] A further improvement of the present invention is:

[0011] The spring lock ring tightening assembly includes two tightening cylinders, which are arranged in parallel and spaced apart. The driving end of one tightening cylinder is connected to the first stretching block, and the driving end of the other tightening cylinder is connected to the second stretching block.

[0012] The first supporting block and the second supporting block are both provided with a slot for fixing a spring lock ring to be installed.

[0013] The first expanding block is also provided with an image acquisition unit.

[0014] The second opening block is connected to the tightening cylinder through a waist-shaped groove.

[0015] A cylinder fixing block is provided at the end of the installation shaft, and the two tightening cylinders are both fixed on the cylinder fixing block.

[0016] The cylinder fixing block is provided with a positioning pin, and the positioning pin is connected to the first support block.

[0017] The first support block and the second support block are both connected to the tightening cylinder via bolts.

[0018] A self-lubricating sleeve is provided inside the fixed sleeve, and the mounting shaft is fixed inside the self-lubricating sleeve.

[0019] The image acquisition unit is a camera.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention relates to a blind cavity assembly device for an engine rotor spring lock ring, comprising a first stretching block and a second stretching block for fixing the spring lock ring to be installed. The first stretching block and the second stretching block are driven by the spring lock ring tightening assembly to reciprocate to realize the expansion and retraction of the spring lock ring, and further the spring lock ring tightening assembly is driven by the installation shaft to move axially and rotate axially, thereby gradually screwing the spring lock ring to be installed into the locking groove. During the installation and movement process, the spring lock ring angle will not be tilted, and the spring lock ring will be prevented from slipping out. When the spring lock ring is installed to the specified position, the driving end of the spring lock ring tightening assembly retracts. At this time, the first stretching block and the second stretching block leave the spring lock ring, and the spring lock ring begins to rebound and restore to a free state, and automatically rebounds into the locking groove, so as to realize the function of assembling the spring lock ring into the intermittent annular groove of the rotor shaft end in the blind cavity or deep cavity of the engine. The device disclosed by the present invention replaces the current situation of manually stretching the spring lock ring and extending it into the deep cavity for blind installation, reduces the difficulty of manual installation on site, and improves assembly efficiency.

[0022] Furthermore, in the present invention, the second support block and the second connection block are connected via a waist-shaped groove, so that the corresponding installation positions of the second support block and the second connection block can be adjusted according to installation requirements.

[0023] Furthermore, a camera is provided on one side of the first support block in the present invention, and the internal installation status can be obtained through the camera, so that the installation position can be adjusted to achieve precise assembly, improve assembly quality, and avoid damage to parts during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is the structural drawing of the assembly parts;

[0026] Figure 2 for Figure 1 AA-directed structure diagram;

[0027] Figure 3 It is a structural diagram of the assembly device of the present invention;

[0028] Figure 4 For the present invention Figure 3 AA-directed structure diagram;

[0029] Figure 5 It is a perspective view of the assembly device of the present invention.

[0030] Among them: 1-spring lock ring; 2-rotor; 3-fixed shaft; 4-installation shaft; 5-self-lubricating sleeve; 6-cylinder fixing block; 7-tightening cylinder; 8-first support block; 9-second support block; 10-camera; 11-locating pin. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0034] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] The present invention is described in further detail below with reference to the accompanying drawings:

[0038] See also Figures 3 to 5 The present invention discloses a blind cavity assembly device for an engine rotor spring lock ring, comprising a fixed shaft sleeve 3, wherein a mounting shaft 4 is arranged inside the fixed shaft sleeve 3, and the mounting shaft 4 can move axially along the inside of the fixed shaft sleeve 3 and can rotate circumferentially; a spring lock ring tightening assembly is arranged at the end of the mounting shaft 4, and both sides of the spring lock ring tightening assembly are driving ends, one driving end is connected to a first stretching block 8, and the other driving end is connected to a second stretching block 9, and the first stretching block 8 and the second stretching block 9 are used to cooperate and fix the spring lock ring to be installed.

[0039] Furthermore, during installation, the fixed sleeve 3 is positioned on the head of the rotor 2, and the other end is fixed to the aircraft engine casing using bolts.

[0040] Furthermore, in an embodiment of the present invention, a self-lubricating sleeve 5 is installed inside the fixed sleeve 3, and the mounting shaft 4 is installed inside the self-lubricating sleeve 5. The mounting shaft 4 and the fixed shaft 3 are matched through the internal self-lubricating sleeve 5 to ensure that the mounting shaft 4 can rotate, and the mounting shaft 4 moves axially in the fixed sleeve 3.

[0041] Furthermore, in an embodiment of the present invention, the spring lock ring tightening assembly includes two tightening cylinders 7, and a cylinder fixing block 6 is installed at the end of the mounting shaft 4. The two tightening cylinders 7 are fixed on the cylinder fixing block 6, and the driving ends of the two tightening cylinders 7 reciprocate in opposite directions respectively. The driving end of one of the tightening cylinders 7 is connected to the first tightening block 8, and the driving end of the other tightening cylinder 7 is connected to the second tightening block 9.

[0042] Furthermore, in the embodiment of the present invention, a positioning pin 11 is installed between the first expansion block 8 and the cylinder fixing block 6. Driven by the expansion cylinder 7, the positioning pin 11 guides the expansion block to reciprocate with the cylinder.

[0043] Furthermore, in an embodiment of the present invention, a camera 10 is mounted on the first opening block 8. During installation, the camera 10 is aligned with the head of the spring lock ring 1. When the mounting shaft 4 rotates, the position of the spring lock ring head is observed through the camera 10 to ensure that the spring lock ring 1 is screwed from the intermittent groove into the locking groove. The position of the spring lock ring head is constantly monitored. When the spring lock ring head passes through the intermittent groove, there is a tendency for the spring lock ring head to screw downward out of the locking groove. In this case, the mounting shaft 4 needs to be pulled outward a certain distance to ensure that the spring lock ring 1 does not fall out of the locking groove during rotation, causing assembly failure.

[0044] Furthermore, in an embodiment of the present invention, a second expansion block 9 is fixedly mounted on the second mounting block. The second expansion block 9 is connected using a waist-shaped groove and a cylinder and has a certain degree of freedom of rotation and up and down movement, which facilitates the spring lock ring 1 to adjust the expansion distance and angle and to screw into the locking groove.

[0045] A tensioning cylinder 7 is installed at the head of the mounting shaft 4. After the cylinder is inflated, the push rod is moved, and the first expansion block 8 is used to expand the spring lock ring 1. The expansion block is guided by the positioning pin 11 to reciprocate with the cylinder, and the thrust of the tensioning cylinder 7 is used to fix the inner wall of the mouth of the spring lock ring 1 to achieve fixation. At the same time, a slot is designed on the second expansion block 9 at the other end to allow the spring lock ring to be pulled axially.

[0046] Furthermore, in an embodiment of the present invention, a first slot is provided on the side of the first support block 8 away from the tightening cylinder 7, and a second slot is provided on the side of the second support block 9 away from the tightening cylinder 7. The first slot and the second slot are used together to fix the spring lock ring 1 to be installed.

[0047] The installation and use process of the embodiment of the present invention is as follows:

[0048] Before assembly, install the head of the spring lock ring 1 into the slot of the first expansion block 8, leaving the head slightly exposed to facilitate viewing with camera 10. Install the lock ring into the slot of the second expansion block 9 at the other end, expanding the spring lock ring axially. Because the second expansion block 9 and the second mounting block are connected by a waist-shaped groove, the installation position can be adjusted according to the deformation trend of the spring lock ring before being secured with a nut.

[0049] After adjusting the position of the spring lock ring 1 , the tightening cylinder 7 is ventilated, and the tightening cylinder 7 pushes the first stretching block 8 and the second stretching block 9 to move to both sides, thereby fixing the spring lock ring 1 .

[0050] The assembly is mounted on the rotor 2, positioned by the opening of the fixed sleeve 3, with the other end secured to the engine casing. The mounting shaft 4, mated to the self-lubricating sleeve 5, ensures flexible rotation. The mounting shaft 4 moves axially within the fixed sleeve 3.

[0051] Use camera 10 to observe the assembly process. Thread the spring lock ring 1 into the locking groove from the intermittent groove of rotor 2. Start rotating the mounting shaft 4 to gradually thread the spring lock ring 1 into the locking groove. When the head of the spring lock ring 1 passes through the intermittent groove, pay attention to the position of the head of the spring lock ring 1. If it tends to move downward from the intermittent groove, move the fixing shaft 4 outward appropriately to prevent it from coming out.

[0052] After the spring lock ring 1 passes through three consecutive intermittent grooves, the air in the cylinder 7 is deflated, and the spring inside the cylinder forces the cylinder push rod to retract, disengaging the first and second expansion blocks 8 and 9 from the spring lock ring. The spring lock ring 1 begins to rebound and return to its free state, automatically snapping back into the locking groove. If it fails to snap back into the locking groove automatically, the assembly device is withdrawn and the spring lock ring 1 is manually pushed back into its original position to complete the assembly.

[0053] The device disclosed in the present invention enables the assembly of a spring lock ring into an intermittent ring groove at the end of a rotor shaft within a blind or deep cavity in an engine. This replaces the existing practice of manually stretching the spring lock ring and inserting it into a deep cavity for blind installation, reducing the difficulty of on-site manual installation and improving assembly efficiency. It also achieves precise assembly, improves assembly quality, and avoids damage to parts during installation. By guiding the lock ring within the intermittent ring groove, the ring avoids tilting during installation, slipping out of the intermittent groove, and repeated installation, thereby improving lock ring assembly efficiency.

[0054] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A blind cavity assembly device for an engine rotor spring lock ring, characterized in that: It comprises a fixed shaft sleeve (3), wherein a mounting shaft (4) is provided inside the fixed shaft sleeve (3), and the mounting shaft (4) is capable of axial movement along the inside of the fixed shaft sleeve (3) and circumferential rotation; The end of the installation shaft (4) is provided with a spring lock ring tightening assembly, and both sides of the spring lock ring tightening assembly are driving ends, one driving end is connected to the first expansion block (8), and the other driving end is connected to the second expansion block (9), and the first expansion block (8) and the second expansion block (9) are used to cooperate and fix the spring lock ring to be installed; The spring lock ring tightening assembly comprises two tightening cylinders (7), which are arranged in parallel and spaced apart, wherein the driving end of one tightening cylinder (7) is connected to the first stretching block (8), and the driving end of the other tightening cylinder (7) is connected to the second stretching block (9); The first support block and the second support block (9) are both provided with a slot, and the slot is used to fix the spring lock ring to be installed; The second opening block (9) is connected to the tightening cylinder (7) via a waist-shaped groove.

2. The blind cavity assembly device for an engine rotor spring lock ring according to claim 1, characterized in that: An image acquisition unit is also provided on the first opening block (8).

3. The blind cavity assembly device for an engine rotor spring lock ring according to claim 1, characterized in that: A cylinder fixing block (6) is provided at the end of the mounting shaft (4), and the two tightening cylinders (7) are both fixed on the cylinder fixing block (6).

4. The blind cavity assembly device for an engine rotor spring lock ring according to claim 3, characterized in that: A positioning pin (11) is provided on the cylinder fixing block, and the positioning pin (11) is connected to the first support block (8).

5. The blind cavity assembly device for an engine rotor spring lock ring according to claim 1, characterized in that: The first support block (8) and the second support block (9) are both connected to the tightening cylinder (7) via bolts.

6. The blind cavity assembly device for an engine rotor spring lock ring according to claim 1, characterized in that: A self-lubricating sleeve (5) is provided inside the fixed sleeve (3), and the mounting shaft (4) is fixed inside the self-lubricating sleeve (5).

7. The blind cavity assembly device for an engine rotor spring lock ring according to claim 2, characterized in that: The image acquisition unit is a camera (10).

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