Nut mounting device for drum-type compressor rotor shaft journal and mounting method

Abstract

This invention relates to the field of aero-engine rotor assembly equipment technology, specifically to a nut installation device and method for the journal of a drum compressor rotor. The nut installation device includes a support assembly for horizontally positioning the drum compressor rotor, a torque multiplier, a first tightening mechanism, and a second tightening mechanism. A space for accommodating the drum and blades is provided between the first and second supports of the support assembly. The torque multiplier is coaxially arranged with the drum compressor rotor to transmit input torque to the rotor shaft. With the cooperation of the first and second tightening mechanisms, the nut and the drum compressor rotor undergo circumferential relative movement, gradually tightening the nut. This nut installation device for the journal of a drum compressor rotor enables the assembly of the round nut at the shaft end while the rotor is in a horizontal state, ensuring that the round nut meets the tightening torque requirements and improving the tightening effect.

Description

Technical Field

[0001] This invention relates to the field of aero-engine rotor assembly equipment technology, specifically to a nut mounting device and method for the journal of a drum compressor rotor. Background Technology

[0002] The drum compressor rotor is a key component of the compressor section in an aero-engine. Its main function is to compress the air entering the engine, increasing its pressure and temperature to provide high-pressure, high-temperature air to the combustion chamber, thereby increasing combustion efficiency and engine thrust. The drum compressor rotor consists of a drum, blades, a shaft, and a balancing device. The shaft connects the drum to the engine's drive structure and transmits power. The drum is mounted on the shaft, and the blades are mounted on the outer edge of the drum. The balancing device ensures the balance of the compressor rotor during high-speed rotation, reducing vibration and improving operational stability.

[0003] For example, to ensure the overall assembly effect of the compressor rotor, a dynamic balancing test is required before final assembly. This is achieved by installing balance blocks or removing materials to meet the compressor rotor's requirements for imbalance. Therefore, in the above process, to further reduce the difficulty of assembling, storing, and hoisting the compressor rotor, it is necessary to keep the compressor rotor's axis horizontal.

[0004] During dynamic balancing tests, the shaft end of a disc compressor rotor is supported on rolling bearings and secured with a round nut. The tightening torque of the round nut typically needs to reach over 700 Nm. Because the disc compressor rotor has a radial blade structure, radial clamping is not possible during round nut assembly to protect the blades. Existing technology places the disc compressor rotor on a tool cart, using the cart to support the rotor shaft end. However, during round nut assembly, the compressor rotor still retains rotational freedom, making it difficult to achieve the preset tightening torque.

[0005] As a result, when the tightening torque of the round nut is small, although the locking ring ensures that the round nut does not come out, the tightening torque does not meet the requirements, which leads to the problem of not being able to accurately simulate the imbalance when the real compressor rotor is working.

[0006] A search revealed that Chinese patent document CN109968012A discloses a tightening method for a helium turbine shaft system and an axial loading tightening fixture. This fixture tightens the shaft system by applying an axial tensile load to the shaft, causing elastic deformation, tightening the nut in the elastic deformation state, and generating a preload after the elastic deformation recovers. During the tightening process, there is no relative movement between the nut end face and the contact surface of the part under compression.

[0007] However, the aforementioned tightening fixture is not suitable for assembling the round nuts on the disc compressor rotor. The disc compressor rotor has a large mass and high rigidity, and the aforementioned tightening fixture cannot tighten the round nuts to the required tightening torque when the disc compressor rotor is in a horizontal position.

[0008] In existing technologies, when assembling the round nut on a drum compressor rotor, a common installation structure involves locking one end of the shaft and tightening the round nut on the other end. However, the excessive tightening torque of the round nut poses a risk of tipping over to the entire compressor rotor structure.

[0009] In addition, during the tightening of the round nut using tooling, assemblers often use a hammering method, taking advantage of the rotor's weight to quickly achieve a large tightening torque. Even so, it is still impossible to obtain a tightening torque of over 700 Nm for the round nut, making it difficult to capture the imbalance of the disc compressor rotor under actual operating conditions. Furthermore, the assembly method of tightening the round nut using hammering tooling results in a rapid and non-uniform tightening, which can easily cause significant damage to the threads at the compressor rotor journal, thus greatly affecting the overall assembly quality of the disc compressor rotor. Summary of the Invention

[0010] The technical problem to be solved by the present invention is how to provide an installation device during the assembly of a disc compressor rotor, so as to enable the disc compressor rotor to be in a horizontal state for the assembly of the shaft end round nut, ensuring that the round nut meets the tightening torque requirements and improving the tightening effect of the round nut.

[0011] To solve the above-mentioned technical problems, on the one hand, the present invention proposes a nut mounting device for the journal of a drum compressor rotor, including a support assembly for forming a horizontally placed drum compressor rotor, a torque multiplier for transmitting input torque, a first tightening mechanism and a second tightening mechanism.

[0012] The support assembly includes a first support for supporting a first journal of a drum compressor rotor and a second support for supporting a second journal of a drum compressor rotor, with a space provided between the first support and the second support for accommodating the drum and blades.

[0013] The torque multiplier is coaxially arranged with the drum compressor rotor and is used to transmit the input torque to the shaft of the drum compressor rotor.

[0014] The first journal has a first spline groove at its end, and the second journal has a second spline groove at its end.

[0015] The first tightening mechanism includes a first wrench head and a first spline shaft for matching the first spline groove; the second tightening mechanism includes a second wrench head and a second spline shaft for matching the second spline groove.

[0016] The first wrench head has a first channel inside for accommodating the first spline shaft, and the second wrench head has a second channel inside for accommodating the second spline shaft.

[0017] Both the connecting end of the first spline shaft and the connecting end of the second spline shaft are provided with countersunk holes for matching the output shaft of the torque multiplier. Both the limiting end of the first wrench head and the limiting end of the second wrench head are provided with limiting holes, which match the middle section of the torque multiplier. Both the engaging end of the first wrench head and the engaging end of the second wrench head match the nut.

[0018] The nut installation device for the journal of the disc compressor rotor utilizes a support assembly to support the first and second journals of the disc compressor rotor, allowing the disc compressor rotor to be placed horizontally and rotate freely within the placement space. The first and second wrench heads respectively engage and lock the nuts on the journals. The input torque of the torque multiplier drives the disc compressor rotor to rotate through the first and second splined shafts, causing the nuts to move circumferentially relative to the disc compressor rotor, thereby tightening the nuts.

[0019] On the other hand, the present invention also proposes an installation method using the above-mentioned nut mounting device for the rotor journal of a disc compressor, comprising the following steps:

[0020] Hoist the disc compressor rotor from above the support assembly into the space between the first and second supports of the support assembly. The first support supports the first journal of the disc compressor rotor, and the second support supports the second journal of the disc compressor rotor. Adjust the disc compressor rotor to be placed in a horizontal position.

[0021] Pre-tighten the nuts by screwing them into the rotor of the drum compressor from the ends of the first and second journals, respectively.

[0022] A tightening mechanism is provided, with a first tightening mechanism on one side of the first journal and a second tightening mechanism on one side of the second journal. The first spline shaft in the first tightening mechanism is located inside the first wrench head, and the second spline shaft in the second tightening mechanism is located inside the second wrench head. The first spline shaft is embedded into the first spline groove of the first journal, and the first wrench head engages with the side wall of the nut on the first journal. The second spline shaft is embedded into the second spline groove of the second journal, and the second wrench head engages with the side wall of the nut on the second journal.

[0023] Install the nut, align the output shaft of the torque multiplier with the rotor of the drum compressor, and insert the output shaft of the torque multiplier into the connecting ends of the first and second splined shafts respectively. This allows the input torque of the torque multiplier to be transmitted to the drum compressor rotor via the first and second splined shafts. The limiting ends of the first and second wrench heads engage with the middle section of the torque multiplier. The input torque of the torque multiplier drives the drum compressor rotor to rotate, and the nut and the drum compressor rotor generate circumferential relative motion, gradually tightening the nut.

[0024] The nut mounting device and method for the journal of a disc compressor rotor provided by this invention have the following outstanding substantive features and significant improvements compared with the prior art: This nut mounting device for the journal of a disc compressor rotor utilizes a support assembly to support the first and second journals of the disc compressor rotor, allowing the disc compressor rotor to be placed horizontally and rotate freely within the placement space. This further reduces the difficulty of assembling, storing, and hoisting the compressor rotor. Simultaneously, the first and second wrench heads respectively engage and lock the nut on the journal. The input torque of the torque multiplier, through the first and second splined shafts, drives the disc compressor rotor to rotate, causing the nut to engage with the journal. The disc compressor rotor generates circumferential relative motion, thereby achieving nut tightening. Compared to the existing technology where the shaft is locked at one end and a round nut is tightened at the other, this nut installation device allows the disc compressor rotor to rotate freely, avoiding the risk of the entire compressor rotor structure tipping over due to excessive tightening torque. In addition, driven by the torque multiplier, the rotor shaft of the disc compressor can rotate evenly relative to the nut, allowing the nut to be evenly locked at the shaft end, greatly reducing damage to the threads at the rotor journal, ensuring assembly quality, and enabling the nut tightening torque to smoothly reach over 700 Nm, ensuring that the nut meets the tightening torque requirements and improving the tightening effect. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of a nut mounting device for the rotor journal of a drum compressor according to an embodiment of the present invention.

[0026] Figure 2 This is a three-dimensional structural diagram of the first support in an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the assembly structure of the first support and the first tightening mechanism in an embodiment of the present invention.

[0028] Figure 4 yes Figure 3A schematic diagram of the cross-sectional structure at point AA.

[0029] Figure 5 This is a three-dimensional structural diagram of the second support in an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the assembly structure of the second support and the second tightening mechanism in an embodiment of the present invention.

[0031] Figure 7 yes Figure 6 A schematic diagram of the structure along direction B.

[0032] Figure 8 This is a three-dimensional structural diagram of the first wrench head in an embodiment of the present invention.

[0033] Figure 9 This is a three-dimensional structural diagram of the second wrench head in an embodiment of the present invention.

[0034] Reference numerals: 1. Support assembly; 2. Torque multiplier; 3. First tightening mechanism; 4. Second tightening mechanism; 5. First journal; 6. Second journal; 7. Countersunk hole; 8. Limiting hole; 9. Locking groove; 10. Lifting bolt; 11. First support; 12. Second support; 13. Bracket; 14. Adjustment device; 15. Limiting structure; 31. First wrench head; 32. First splined shaft; 41. Second wrench head; 42. Second splined shaft; 151. Limiting bracket; 152. Stop. Detailed Implementation

[0035] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0036] like Figures 1-9 As shown in the figure, this embodiment of the invention proposes a nut installation device for the journal of a drum compressor rotor. The purpose is to ensure that the drum compressor rotor is in a horizontal state during the assembly process so that the round nut at the shaft end can be assembled, ensuring that the round nut meets the tightening torque requirements and improving the tightening effect of the round nut.

[0037] This invention presents a nut installation device for the journal of a disc compressor rotor. Addressing the difficulty in clamping disc compressor rotors due to their structural characteristics, this device utilizes a support assembly 1 to support the first journal 5 and the second journal 6 of the disc compressor rotor. This allows the rotor to be placed horizontally and rotate freely within its placement space, further reducing the difficulty of assembling, storing, and hoisting the compressor rotor. Simultaneously, the nut installation device uses a first wrench head 31 and a second wrench head 41 to engage and lock the nut on the journal. The input torque from the torque multiplier 2, transmitted through the first spline shaft 32 and the second spline shaft 42, drives the disc compressor rotor to rotate, causing circumferential relative motion between the nut and the rotor. This achieves nut tightening, ensuring the nut meets the tightening torque requirements and improving the tightening effect.

[0038] like Figure 1 As shown, a nut mounting device for a drum compressor rotor journal includes a support assembly 1 for horizontally positioning the drum compressor rotor, a torque multiplier 2 for transmitting input torque, a first tightening mechanism 3, and a second tightening mechanism 4.

[0039] The support assembly 1 includes a first support 11 for supporting a first journal 5 of a disc compressor rotor, and a second support 12 for supporting a second journal 6 of the disc compressor rotor. A space for accommodating the disc and blades is provided between the first support 11 and the second support 12. A first spline groove is provided at the end of the first journal 5. A second spline groove is provided at the end of the second journal 6. Both the first and second spline grooves are used to transmit torque for the disc compressor rotor. Figure 1 As shown, the first journal 5 is located at the front shaft end of the drum compressor rotor, and the second journal 6 is located at the rear shaft end of the drum compressor rotor.

[0040] Torque multiplier 2 is coaxially mounted with the drum compressor rotor and is used to transmit input torque to the rotor shaft. The input shaft of torque multiplier 2 is connected to a hand tool or power tool to apply the input torque. For example, the input torque is amplified via a planetary gear mechanism and transmitted to the output shaft of torque multiplier 2.

[0041] like Figure 3 Combination Figure 6 As shown, the first tightening mechanism 3 includes a first wrench head 31 and a first spline shaft 32 for mates with the first spline groove. The second tightening mechanism 4 includes a second wrench head 41 and a second spline shaft 42 for mates with the second spline groove. The first wrench head 31 has a first channel inside for receiving the first spline shaft 32. The second wrench head 41 has a second channel inside for receiving the second spline shaft 42.

[0042] like Figure 3 Combination Figure 6 As shown, both the connecting end of the first splined shaft 32 and the connecting end of the second splined shaft 42 are provided with countersunk holes 7 for matching the output shaft of the torque multiplier 2. Figure 8 Combination Figure 9 As shown, both the limiting end of the first wrench head 31 and the limiting end of the second wrench head 41 are provided with limiting holes 8. The limiting holes 8 match the middle section of the torque multiplier 2. The engaging ends of the first wrench head 31 and the second wrench head 41 are both matched with nuts. For example, the countersunk hole 7 is a square hole, and the limiting hole 8 is a hexagonal hole.

[0043] The output shaft of the torque multiplier 2 is embedded in the connecting end of the first splined shaft 32 and the connecting end of the second splined shaft 42, respectively, to transmit the input torque of the torque multiplier 2 to the drum compressor rotor through the first splined shaft 32 and the second splined shaft 42. The limiting ends of the first wrench head 31 and the second wrench head 41 are engaged with the middle section of the torque multiplier 2. The input torque of the torque multiplier 2 drives the drum compressor rotor to rotate, and the nut and the drum compressor rotor generate circumferential relative motion, gradually tightening the nut.

[0044] To further reduce the difficulty of using the torque multiplier 2, such as Figure 2 Combination Figure 5 As shown, the support assembly 1 also includes a bracket 13 for supporting the torque multiplier 2. The bracket 13 is provided on the outer side of both the first support 11 and the second support 12. When using this nut mounting device for the rotor journal of a drum compressor, the torque multiplier 2 is placed on the bracket 13, facilitating adjustment of its installation position and allowing a single operator to complete the assembly work.

[0045] To further improve the compatibility of the nut mounting device for the rotor journal of the disc compressor with torque multipliers 2 of different specifications, such as... Figure 4 As shown, the bracket 13 is equipped with an adjustment device 14 for raising and lowering the torque multiplier 2. The fixed end of the adjustment device 14 is mounted on the bracket 13. The telescopic end of the adjustment device 14 is arranged along the height direction of the bracket 13.

[0046] According to a preferred embodiment of the present invention, the adjusting device 14 may be a power cylinder, such as a hydraulic cylinder or a pneumatic cylinder. The cylinder body of the hydraulic cylinder or the pneumatic cylinder is mounted on the first support 11 and the second support 12. The torque multiplier 2 is adjusted by driving the piston rod end of the hydraulic cylinder or the piston rod end of the pneumatic cylinder to ensure that the output shaft of the torque multiplier 2 of different specifications can be coaxially arranged with the rotating shaft of the drum compressor rotor.

[0047] For example, the adjusting device 14 can also be a set screw structure, which can be used to adjust the height of the torque multiplier 2 by engaging the set screw.

[0048] To further improve the stability of the first wrench head 31 and the second wrench head 41, such as Figure 4 Combination Figure 5 As shown, locking grooves 9 are provided on the side walls of both the first wrench head 31 and the second wrench head 41. The locking grooves 9 are used to axially limit the first wrench head 31 and the second wrench head 41 and restrict their circumferential rotation.

[0049] like Figure 2 Combination Figure 7 As shown, a limiting structure 15 is provided on the bracket 13. The limiting structure 15 includes a limiting bracket 151 and a stop 152 for embedding into the locking groove 9. The limiting bracket 151 is mounted on the bracket 13. The stop 152 is mounted on the limiting bracket 151. In this way, the stop 152 is embedded in the locking groove 9, further ensuring the stability of the first wrench head 31 and the second wrench head 41.

[0050] To further reduce the assembly difficulty of the nut mounting device used for the rotor journal of a disc compressor, such as Figure 1 As shown, both the first support 11 and the second support 12 are equipped with lifting bolts 10. The lifting bolts 10 are used to facilitate the lifting operation of the support assembly 1.

[0051] The nut mounting device for the rotor journal of a drum compressor proposed in this embodiment of the invention includes the following steps when in use:

[0052] The disc compressor rotor is hoisted from above the support assembly 1 into the placement space between the first support 11 and the second support 12 of the support assembly 1. The first support 11 supports the first journal 5 of the disc compressor rotor, and the second support 12 supports the second journal 6 of the disc compressor rotor. The disc compressor rotor is then adjusted to be placed in a horizontal position.

[0053] Pre-tighten the nuts by screwing them into the rotor of the drum compressor from the end of the first journal 5 and the end of the second journal 6, respectively.

[0054] A tightening mechanism is provided. A first tightening mechanism 3 is provided on one side of the first journal 5, and a second tightening mechanism 4 is provided on one side of the second journal 6. The first spline shaft 32 in the first tightening mechanism 3 is provided inside the first wrench head 31, and the second spline shaft 42 in the second tightening mechanism 4 is provided inside the second wrench head 41. The first spline shaft 32 is embedded into the first spline groove of the first journal 5, and the first wrench head 31 engages with the side wall of the nut on the first journal 5. The second spline shaft 42 is embedded into the second spline groove of the second journal 6, and the second wrench head 41 engages with the side wall of the nut on the second journal 6.

[0055] Install the nut, and arrange the output shaft of the torque multiplier 2 coaxially with the drum compressor rotor. Insert the output shaft of the torque multiplier 2 into the connecting end of the first spline shaft 32 and the connecting end of the second spline shaft 42, respectively, to transmit the input torque of the torque multiplier 2 to the drum compressor rotor through the first spline shaft 32 and the second spline shaft 42. The limiting end of the first wrench head 31 and the limiting end of the second wrench head 41 are engaged with the middle section of the torque multiplier 2, respectively. The input torque of the torque multiplier 2 drives the drum compressor rotor to rotate, and the nut and the drum compressor rotor generate circumferential relative motion, gradually tightening the nut.

[0056] In order to improve the compatibility of torque multipliers 2 with different specifications during the installation of nuts, the height of torque multipliers 2 is adjusted by using adjustment device 14.

[0057] According to a preferred embodiment of the present invention, the step of installing the nut further includes further limiting the first wrench head 31 and the second wrench head 41. The side walls of the first wrench head 31 and the second wrench head 41 are provided with locking grooves 9. The brackets 13 are respectively installed on the first support 11 and the second support 12, and the limiting structure 15 is installed on the bracket 13. The limiting bracket 151 in the limiting structure 15 is installed on the bracket 13, and the stop block 152 in the limiting structure 15 is installed on the limiting bracket 151, with one end of the stop block 152 embedded in the locking groove 9.

[0058] The nut installation device for the journal of a disc compressor rotor proposed in this embodiment utilizes a support assembly 1 to support the first journal 5 and the second journal 6 of the disc compressor rotor, allowing the disc compressor rotor to be placed horizontally and rotate freely within the placement space. This helps to further reduce the difficulty of assembling, storing, and hoisting the compressor rotor. Simultaneously, the first wrench head 31 and the second wrench head 41 respectively engage and lock the nut on the journal. The input torque of the torque multiplier 2, combined with the first spline shaft 32 and the second spline shaft 42, drives the disc compressor rotor to rotate, causing the nut and the disc compressor rotor to move circumferentially relative to each other, thereby achieving nut tightening.

[0059] Compared to the existing technology where the shaft is locked at one end and a round nut is tightened at the other end, the nut mounting device for the rotor journal of the disc compressor allows the disc compressor rotor to rotate freely during use, avoiding the risk of the entire compressor rotor structure tipping over due to excessive tightening torque of the nut.

[0060] In addition, compared to the method of tightening nuts by striking the tool, the rotor shaft of the drum compressor can rotate evenly relative to the nut under the drive of the torque multiplier 2, so that the nut can be evenly locked at the shaft end, which greatly reduces the damage to the threads at the rotor journal, ensures the assembly quality, and the tightening torque of the nut can smoothly reach more than 700Nm, ensuring that the nut meets the tightening torque requirements and improving the tightening effect of the nut.

Claims

1. A nut mounting arrangement for a drum disk compressor rotor journal, characterized by, It includes a support assembly for horizontally positioning the drum compressor rotor, a torque multiplier for transmitting input torque, a first tightening mechanism, and a second tightening mechanism. The support assembly includes a first support for supporting a first journal of a drum compressor rotor and a second support for supporting a second journal of a drum compressor rotor, with a space provided between the first support and the second support for accommodating the drum and blades. The torque multiplier is coaxially arranged with the drum compressor rotor and is used to transmit the input torque to the shaft of the drum compressor rotor. The first journal has a first spline groove at its end, and the second journal has a second spline groove at its end. The first tightening mechanism includes a first wrench head and a first spline shaft for matching the first spline groove; the second tightening mechanism includes a second wrench head and a second spline shaft for matching the second spline groove. The first wrench head has a first channel inside for accommodating the first spline shaft, and the second wrench head has a second channel inside for accommodating the second spline shaft. Both the connecting end of the first spline shaft and the connecting end of the second spline shaft are provided with countersunk holes for matching the output shaft of the torque multiplier. Both the limiting end of the first wrench head and the limiting end of the second wrench head are provided with limiting holes, which match the middle section of the torque multiplier. Both the engaging end of the first wrench head and the engaging end of the second wrench head match the nut.

2. A nut mounting arrangement for a disc wheel compressor rotor journal according to claim 1, characterized in that The support assembly also includes a bracket for supporting the torque multiplier, and brackets are provided on the outer sides of both the first support and the second support.

3. A nut mounting arrangement for a disc wheel compressor rotor journal according to claim 2, characterized in that The bracket is equipped with an adjustment device for raising and lowering the torque multiplier. The fixed end of the adjustment device is installed on the bracket, and the telescopic end of the adjustment device is arranged along the height direction of the bracket.

4. The nut mounting arrangement for a disc wheel compressor rotor journal according to claim 2, characterized in that Both the first and second wrench heads have locking grooves on their side walls.

5. The nut mounting arrangement for a disc wheel compressor rotor journal according to claim 4, characterized in that The bracket is provided with a limiting structure, which includes a limiting bracket and a stop for being embedded in a locking groove. The limiting bracket is installed on the bracket, and the stop is installed on the limiting bracket.

6. The nut mounting arrangement for a disc wheel compressor rotor journal according to claim 1, characterized in that The countersunk hole is a square hole, and the limiting hole is a hexagonal hole.

7. The nut mounting device for the rotor journal of a disc compressor according to claim 1, characterized in that, Both the first and second supports are equipped with lifting bolts.

8. The installation method of the nut mounting device for the rotor journal of a disc compressor according to any one of claims 1-7, characterized in that, Includes the following steps: Hoist the disc compressor rotor from above the support assembly into the space between the first and second supports of the support assembly. The first support supports the first journal of the disc compressor rotor, and the second support supports the second journal of the disc compressor rotor. Adjust the disc compressor rotor to be placed in a horizontal position. Pre-tighten the nuts by screwing them into the rotor of the drum compressor from the ends of the first and second journals, respectively. A tightening mechanism is provided, with a first tightening mechanism on one side of the first journal and a second tightening mechanism on one side of the second journal. The first spline shaft in the first tightening mechanism is located inside the first wrench head, and the second spline shaft in the second tightening mechanism is located inside the second wrench head. The first spline shaft is embedded into the first spline groove of the first journal, and the first wrench head engages with the side wall of the nut on the first journal. The second spline shaft is embedded into the second spline groove of the second journal, and the second wrench head engages with the side wall of the nut on the second journal. Install the nut, align the output shaft of the torque multiplier with the rotor of the drum compressor, and insert the output shaft of the torque multiplier into the connecting ends of the first and second splined shafts respectively. This allows the input torque of the torque multiplier to be transmitted to the drum compressor rotor via the first and second splined shafts. The limiting ends of the first and second wrench heads engage with the middle section of the torque multiplier. The input torque of the torque multiplier drives the drum compressor rotor to rotate, and the nut and the drum compressor rotor generate circumferential relative motion, gradually tightening the nut.

9. The installation method of the nut mounting device for the rotor journal of a disc compressor according to claim 8, characterized in that, The process of installing the nut also includes adjusting the height of the torque multiplier using an adjustment device.

10. The installation method of the nut mounting device for the rotor journal of a disc compressor according to claim 8, characterized in that, The step of installing the nut also includes further limiting the first wrench head and the second wrench head. Locking grooves are provided on the side walls of the first wrench head and the second wrench head. Brackets are installed on the first support and the second support respectively, and limiting structures are installed on the brackets. The limiting bracket in the limiting structure is installed on the bracket, and the stop block in the limiting structure is installed on the limiting bracket, with one end of the stop block embedded in the locking groove.

Images