A rotor cold press assembly device and method for a compressor

Abstract

This invention provides a cold-pressing assembly device and method for compressor rotors, relating to the field of compressor development and debugging. Addressing the problem of assembly deviations caused by the difficulty in controlling the posture of the crankshaft when pressing it into the rotor, the invention sets up a mandrel that engages with a cylinder block. The mandrel passes through the rotor and engages with the crankshaft of the compressor. The cylinder block pushes the rotor to move and retracts the mandrel into the shaft hole of the cylinder block, allowing the rotor to be smoothly transferred from the mandrel to the crankshaft of the compressor. This solves the problem of assembly deviations between the crankshaft and the rotor, improving assembly accuracy.

Description

Technical Field

[0001] This invention relates to the field of compressor development and debugging, and specifically to a compressor rotor cold pressing assembly device and method. Background Technology

[0002] In the process of compressor structure development, performance indicators are an important standard for determining whether a compressor is qualified. The motor component is a crucial link affecting performance indicators. Therefore, whether the rotor component matches the core is a very important factor in the development process. Currently, in the compressor assembly process, the rotor component pressing process requires mass production automated lines. Automated lines are only suitable for mass production assembly of the same model. This is very inconvenient for small-scale production assembly and rotor component replacement in the compressor development process.

[0003] Using automated assembly lines not only affects the production output of these lines but also requires significant time to adjust tooling for different compressor models, impacting production line efficiency and making it difficult to simultaneously meet the demands of both the development process and production efficiency. Chinese patent (publication number: CN217571660U) discloses a compressor rotor-pump body axial clearance rework device, which adjusts the clearance between the rotor and crankshaft by applying axial pressure. However, during the press-fitting process, the core component is prone to tilting when pressed into the rotor. The varying press-fitting resistance at different positions between the crankshaft and rotor countersunk holes leads to assembly deviations between the crankshaft and rotor, resulting in assembly errors and affecting operational performance. Furthermore, it can only prototype the assembly of compressor rotor components for the same model at a time, and readjustments are required for different models, making it difficult to meet the need for separate debugging of different core component specifications during the development process. Summary of the Invention

[0004] The purpose of this invention is to address the deficiencies of existing technologies by providing a cold-press assembly device and method for compressor rotors. The device and method involve setting up a mandrel that mates with a cylinder, passing through the rotor and engaging with the crankshaft of the compressor body. The cylinder body pushes the rotor to move and retracts the mandrel into the shaft hole of the cylinder body, allowing the rotor to be smoothly transferred from the mandrel to the crankshaft of the compressor body. This solves the problem of assembly deviation between the crankshaft and the rotor and improves assembly accuracy.

[0005] The first objective of this invention is to provide a rotor cold-pressing assembly device for a compressor, which adopts the following solution:

[0006] include:

[0007] The spindle is a stepped shaft formed by the docking of the positioning shaft section and the fitting shaft section. One end of the fitting shaft section is slidably set in the shaft hole of the cylinder body, and the end of the positioning shaft section faces the pressing component to coaxially cooperate with the positioning hole of the crankshaft of the movement.

[0008] The pressing assembly is mounted above the cylinder axis and has a pressing component arranged coaxially with the positioning shaft section. The pressing component and the cylinder end face form a pressing area to accommodate the movement.

[0009] The telescopic component is connected to the other end of the cylinder away from the pressure assembly and is used to adjust the distance between the cylinder and the pressure assembly.

[0010] Furthermore, the diameter of the positioning shaft segment is smaller than the diameter of the sleeve shaft segment, and one end of the sleeve shaft segment located in the shaft hole abuts against an elastic element, which acts axially on the end of the mandrel.

[0011] Furthermore, the end of the sleeve shaft segment away from the positioning shaft segment is provided with a sliding shaft segment, which slides in conjunction with the shaft hole and abuts against the elastic element.

[0012] Furthermore, the mandrel is provided in multiple parts, and the mandrel is detachably connected to the cylinder body. An anti-detachment ring is provided at the end of the shaft hole facing the pressing component. The diameters of the sleeve shaft sections of different mandrels are arranged differently, and the diameters of the sliding shaft sections are equal and can fit against the inner wall of the shaft hole.

[0013] Furthermore, the end of the positioning shaft segment facing the pressing component has a tapered tip, and a tapered transition section is provided at the joint between the positioning shaft segment and the sleeve shaft segment.

[0014] Furthermore, an annular guard plate is connected to the end of the cylinder body facing the pressure assembly. The annular guard plate is arranged around the spindle, and the spindle and the annular guard plate together with the end face of the cylinder body form a bearing area that constrains the position of the rotor.

[0015] Furthermore, the pressure-blocking assembly also includes a support member and a pressure monitoring element. The pressure monitoring element is located inside the support member, with one end of the support member connected to the frame and the other end connected to the pressure-blocking component.

[0016] Furthermore, the pressing member and the supporting member are coaxially rotatably connected. The pressing member includes a circular pressing plate and an arc-shaped guard plate arranged coaxially. The arc-shaped guard plate is connected to the edge of the circular pressing plate to form a semi-enclosed structure that adapts to the end of the crankshaft of the movement.

[0017] A second object of the present invention is to provide a method of operation, utilizing the compressor rotor cold pressing assembly apparatus as described in the first object, comprising:

[0018] The rotor countersunk hole passes through the positioning shaft section and is sleeved outside the mounting shaft section, with one end of the rotor abutting the cylinder end face;

[0019] The movement is positioned in the press-fitting area, with the positioning shaft section coaxially engaged with the positioning hole. The telescopic component drives the cylinder, rotor, and movement until the end of the movement crankshaft away from the positioning hole contacts the abutment component.

[0020] The telescopic component pushes the rotor to move, and the sleeve shaft section of the spindle gradually retracts into the shaft hole until the rotor is disengaged from the sleeve shaft section and fitted onto the crankshaft. The telescopic component then resets, and the core after the rotor is pressed in is removed.

[0021] Furthermore, the diameter of the sleeve shaft segment is equal to that of the crankshaft mounting rotor segment, and the crankshaft mounting rotor segment is kept coaxial with the mandrel during installation.

[0022] Compared with the prior art, the advantages and positive effects of this invention are:

[0023] (1) To address the problem of assembly deviation caused by the difficulty in controlling the posture of the crankshaft when pressing it into the rotor, a mandrel is designed to cooperate with the cylinder block. The mandrel passes through the rotor and can cooperate with the crankshaft of the mechanism. The cylinder block pushes the rotor to move and retracts the mandrel into the shaft hole of the cylinder block, so that the rotor can be smoothly transferred from the mandrel to the crankshaft of the mechanism, thus solving the problem of assembly deviation between the crankshaft and the rotor and improving the assembly accuracy.

[0024] (2) The mandrel is a stepped shaft, which is divided into different functional sections along the axial direction. The positioning shaft section cooperates with the positioning hole of the crankshaft of the mechanism to realize the positioning constraint of the pressing direction. The mounting shaft section preloads the rotor and guides the rotor when pushing the rotor to press, so as to avoid the rotor from deviating. Combined with the sliding shaft section at the end of the positioning shaft section, the mandrel posture can be kept coaxial with the shaft hole. The mandrel can slide to cooperate with the shaft hole to realize the extension and retraction action, which meets the action requirements in the pressing process.

[0025] (3) A limiting ring is provided at the opening position of the shaft hole. The limiting ring can constrain the spindle from coming out. At the same time, after removing the limiting ring, different specifications of spindles can be replaced to adapt to different specifications of rotors and crankshafts. The sliding shaft sections corresponding to different spindles are the same, so that they are in the required coaxial state after being fitted with the shaft hole. The required accuracy can be achieved before and after replacing different specifications, thereby improving the adjustment speed and thus improving the debugging efficiency.

[0026] (4) The end of the positioning shaft section of the mandrel has a tapered tip to assist the positioning shaft section of the mandrel in cooperating with the positioning hole. The tapered transition section can reduce the collision between the mandrel and the stepped hole on the rotor, and reduce assembly errors caused by rotor damage. Attached Figure Description

[0027] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0028] Figure 1 This is a schematic diagram of the compressor rotor cold pressing assembly device in Embodiments 1 and 2 of the present invention.

[0029] Figure 2This is a side view schematic diagram of the compressor rotor cold pressing assembly device in Embodiments 1 and 2 of the present invention.

[0030] Figure 3 This is a schematic diagram of the mandrel and cylinder in Embodiments 1 and 2 of the present invention.

[0031] Figure 4 This is a schematic diagram of the mandrel and cylinder body in Embodiments 1 and 2 of the present invention.

[0032] Figure 5 This is a front view schematic diagram of the pressing component in Embodiments 1 and 2 of the present invention.

[0033] Figure 6 This is a side view schematic diagram of the pressing component in Embodiments 1 and 2 of the present invention.

[0034] Figure 7 This is a schematic diagram of the end face of the pressing member of the pressing assembly in Embodiments 1 and 2 of the present invention.

[0035] Figure 8 This is a schematic diagram showing the relative positions of the rotor and crankshaft in embodiments 1 and 2 of the present invention.

[0036] Among them, 1. cylinder block, 2. rotor, 3. mechanism, 4. pressure assembly, 5. pressure monitoring element, 6. pressure component, 7. telescopic component, 8. frame, 9. spindle, 10. annular guard plate, 11. elastic component, 12. base plate, 13. positioning shaft section, 14. sleeve shaft section, 15. sliding shaft section, 16. circular pressure plate, 17. arc-shaped guard plate, 18. crankshaft. Detailed Implementation

[0037] Example 1

[0038] In a typical embodiment of the present invention, such as Figures 1-8 As shown, a rotor cold pressing assembly device for a compressor is presented.

[0039] The rotor 2 press-fitting equipment currently used in the development laboratory setting is inconvenient to control the press-fitting posture. Due to the different press-fitting resistance at different positions between the crankshaft 18 and the countersunk hole of the rotor 2, it will cause assembly deviation between the crankshaft 18 and the rotor 2, resulting in assembly errors and affecting the operation effect.

[0040] Based on this, this embodiment provides a compressor rotor cold pressing assembly device, which is particularly suitable for the pressing process of rotor 2 in laboratory scenarios. It can use the telescopic mandrel 9 to position and guide rotor 2, control the posture of rotor 2 during the pressing process, reduce the assembly deviation between rotor 2 and crankshaft 18. The mandrel 9 and the cylinder 1 it is paired with are detachably connected, and the mandrel 9 can be replaced to adapt rotor 2 and crankshaft 18 of different specifications, increasing its applicable scenarios and thus improving pressing efficiency.

[0041] The rotor cold pressing assembly device for the compressor described above will now be described in detail with reference to the accompanying drawings.

[0042] See Figure 1 The compressor rotor cold pressing assembly device mainly includes a spindle 9, a cylinder 1, a pressing component 4, a telescopic component 7, and a frame 8. The frame 8 includes a base frame and a top plate. The telescopic component 7 is installed on the base frame. The cylinder 1 is installed at the output end of the telescopic component 7. The spindle 9 is slidably installed in the shaft hole of the cylinder 1. The pressing component 4 is installed on the base frame, so that the pressing component 4 is mounted above the cylinder 1 and the spindle 9. The pressing component 4 is provided with a pressing component 6 coaxial with the spindle 9. The pressing component 6 and the end face of the cylinder 1 form a pressing area to accommodate the core 3.

[0043] The compressor core 3 is equipped with a crankshaft 18, such as Figure 8 As shown, one end of the crankshaft 18 is connected to the connecting rod, and the other end extends to the bottom of the movement 3 to form a stepped shaft. The stepped shaft is connected to a stepped hole pre-set in the rotor 2. The end face of the segment of the crankshaft 18 that is connected to the rotor 2 is provided with a positioning hole.

[0044] During use, the stepped hole on the rotor 2 is fitted over the spindle 9, and the end face of the rotor 2 abuts against the end face of the cylinder 1, so that one end of the spindle 9 is inserted into the positioning hole. At this time, the telescopic component 7 drives the cylinder 1, rotor 2, and core 3 to rise slowly and uniformly. One end of the crankshaft 18 of the connecting rod contacts the pressing component 6. As the telescopic component 7 continues to push forward, the rotor 2 is gradually pressed into the stepped shaft of the crankshaft 18 of the core 3. At this time, the pressure monitoring element 5 set on the pressing component 4 can be observed. When the rotor 2 is pressed into the required pressure value, the telescopic component 7 retracts to release the pressure. After retracting into place, the rotor 2 and core 3 after pressing are removed, and the pressing is completed.

[0045] The telescopic component 7 can be a jack, hydraulic cylinder, electric cylinder, pneumatic cylinder, etc. The telescopic component 7 can drive the cylinder body 1 to reciprocate along the axial direction of its shaft hole, such as... Figure 1 , Figure 2 As shown, the motion stroke of the telescopic component 7 at the output end is set according to the pressing stroke and the spacing of the pressing area to meet the motion requirements of pressing and retraction.

[0046] Optionally, taking the telescopic component 7 as an example, the top of the jack is connected to an upper plate, which is adapted to the bottom surface of the cylinder 1. The upper plate also has connecting holes, allowing the cylinder 1 to be fixed to the top of the jack via connecting parts. The bottom of the jack is connected to a lower plate, which also has connecting holes, allowing the cylinder 1 to be fixed to the base frame of the machine frame 8 via connecting parts. The connecting parts can be detachable fasteners such as bolts and screws, or non-detachable connecting parts such as clips and rivets.

[0047] Optionally, the frame 8 is designed as a detachable structure, with the top plate and the base frame connected by a support rod. One end of the support rod is detachably connected to the top plate, and the other end is detachably connected to the base frame. After the top plate is connected to the support rod, it serves as a reaction frame for the pressure-blocking component 4. At the same time, after the base frame is connected to the support rod, it serves as a reaction frame for the telescopic component 7.

[0048] In other alternative embodiments, the end of the support rod may be machined with external threads, and threaded holes may be machined at the locations where the top plate and base frame connect to the support rod, establishing a connection through the engagement of the threaded holes and the external threads. Additionally, at least two support rods may be configured, such as... Figure 1 As shown, two symmetrically distributed support rods are used.

[0049] The mandrel 9 and the cylinder 1 together form a cold pressing head assembly. The cold pressing head assembly is installed on the telescopic component 7 and is driven by the telescopic component 7 to adjust its position and complete the pressing and retraction actions.

[0050] The spindle 9 is a stepped shaft formed by the docking of the positioning shaft section 13 and the sleeve shaft section 14. One end of the sleeve shaft section 14 is slidably disposed in the shaft hole of the cylinder body 1, and the other end is located outside the shaft hole of the cylinder body 1. By sliding the spindle 9 relative to the shaft hole, the length of the spindle 9 outside the shaft hole is changed, thereby achieving the action of extension and shortening. The end of the positioning shaft section 13 faces the pressing component 4, keeping the positioning shaft section 13 and the positioning hole coaxially distributed. After the telescopic component 7 drives the cylinder body 1 and the spindle 9 to move, the positioning shaft section 13 of the spindle 9 can be coaxially matched with the positioning hole of the crankshaft 18 of the movement 3.

[0051] After the pressing assembly 4 is mounted above the axis of the cylinder body 1, the pressing part 6 on it faces the end of the positioning shaft section 13. At the same time, the pressing part 6 and the positioning shaft section 13 are arranged coaxially. The pressing part 6 and the end face of the cylinder body 1 form a pressing area to accommodate the core 3. The core shaft 9 is used to position the rotor 2 to be pressed.

[0052] like Figure 1 As shown, the telescopic component 7 is connected to the other end face of the cylinder 1 away from the pressing component 4. When the telescopic component 7 drives the cylinder 1 to move, it can adjust the distance between the cylinder 1 and the pressing component 6.

[0053] like Figure 3 , Figure 4 As shown, the diameter of the positioning shaft section 13 is smaller than the diameter of the sleeve shaft section 14. One end of the sleeve shaft section 14 located in the shaft hole abuts against the elastic element 11. The elastic element 11 acts axially on the end of the mandrel 9. The end of the sleeve shaft section 14 away from the positioning shaft section 13 is provided with a sliding shaft section 15. The sliding shaft section 15 slides with the shaft hole and abuts against the elastic element 11.

[0054] It should be noted that the elastic element 11 provides a restoring force to the mandrel 9, keeping the sleeve shaft section 14 of the mandrel 9 outside the shaft hole of the cylinder body 1 before applying the pressing force to the rotor 2, thus providing positioning for the rotor 2. Optionally, the elastic element 11 can be a compression spring, leaf spring, or other similar component. The maximum deformation stroke of the elastic element 11 is greater than the maximum displacement path of the mandrel 9 relative to the shaft hole, thereby maintaining the effect of the elastic element 11 on the mandrel 9.

[0055] In other alternative embodiments, the radial dimension of the elastic element 11 is slightly smaller than the shaft hole dimension, and it can stably abut against the sliding shaft section 15 of the mandrel 9.

[0056] In addition, such as Figure 4 As shown, the sleeve shaft section 14 can also be slidably engaged with the shaft hole on the bushing, with the sliding shaft section 15 located inside the shaft hole and serving as an abutment structure to maintain contact with the elastic element 11. It can be understood that the sliding engagement between the mandrel 9 and the shaft hole of the cylinder body 1 constrains the position of the mandrel 9 and enables the mandrel 9 to move axially. Therefore, both the sliding engagement between the sleeve shaft section 14 and the shaft hole, and the sliding engagement between the sliding shaft section 15 and the shaft hole, can achieve the aforementioned action requirements.

[0057] The cylinder body 1 has a cylindrical structure with a shaft hole in the middle. The shaft hole can be a hole of equal diameter or a hole of other diameters. Figure 4 The stepped hole is shown. A base plate 12 that abuts against the elastic member 11 is connected to the end face of the cylinder body 1 corresponding to one end of the shaft hole.

[0058] To address the issue that current rotor 2 press-fitting equipment cannot adapt to various specifications of rotor 2 and crankshaft 18, multiple mandrels 9 of different specifications are configured to adapt to different specifications of rotor 2. The mandrel 9 is detachably connected to the cylinder block 1, and press-fitting of rotor 2 of different specifications can be achieved by replacing the mandrel 9.

[0059] Specifically, there are multiple spindles 9. The spindles 9 are detachably connected to the cylinder body 1. An anti-detachment ring is provided at the end of the shaft hole facing the pressing component 4. The spindles 9 can be replaced by removing and installing the anti-detachment ring.

[0060] The different mandrels 9 are arranged with different diameters in the sleeve shaft section 14, and the sliding shaft section 15 has the same diameter and can fit against the inner wall of the shaft hole, keeping the mandrel 9 and the shaft hole coaxial, thereby keeping the rotor 2 constrained by the mandrel 9 and the crankshaft 18 of the mechanism 3 coaxial.

[0061] A limiting ring is provided at the shaft hole opening position. The limiting ring can restrain the spindle 9 from coming out. At the same time, after removing the limiting ring, different specifications of spindle 9 can be replaced to adapt to different specifications of rotor 2 and crankshaft 18. The sliding shaft section 15 corresponding to different spindle 9 is the same, so that it is in the required coaxial state after it is engaged with the shaft hole. The required accuracy can be achieved before and after changing different specifications, thereby improving the adjustment speed and thus improving the debugging efficiency.

[0062] In addition, the end of the positioning shaft section 13 facing the pressing component 4 has a tapered tip, and a tapered transition section is provided at the joint between the positioning shaft section 13 and the mounting shaft section 14. The tapered tip at the end of the positioning shaft section 13 of the mandrel 9 assists in the fit between the positioning shaft section 13 of the mandrel 9 and the positioning hole. The tapered transition section reduces the collision between the mandrel 9 and the stepped hole on the rotor 2, and reduces assembly errors caused by damage to the rotor 2.

[0063] The cylinder body 1 is connected to an annular guard plate 10 at one end facing the pressing component 4. The annular guard plate 10 is arranged around the spindle 9. The spindle 9 and the annular guard plate 10 together with the end face of the cylinder body 1 form a bearing area that constrains the position of the rotor 2.

[0064] like Figure 5 , Figure 6 , Figure 7 As shown, the pressure-blocking assembly 4 includes a pressure-blocking component 6, a support component, and a pressure monitoring element 5. The pressure monitoring element 5 is located inside the support component. One end of the support component is connected to the frame 8, and the other end is connected to the pressure-blocking component 6.

[0065] The pressing component 6 is coaxially rotatably connected to the support component. The pressing component 6 includes a circular pressing plate 16 and an arc-shaped guard plate 17 arranged coaxially. The arc-shaped guard plate 17 is connected to the edge of the circular pressing plate 16 to form a semi-enclosed structure that fits the end of the crankshaft 18 of the movement 3, so as to avoid the connecting rod structure that the crankshaft 18 is matched with, and keep the end face of the circular pressing plate 16 in contact with the end of the crankshaft 18 to bear the force during the pressing process.

[0066] Optionally, the support component consists of two sections of solid round steel joined together. To ensure its compressive strength and prevent deformation of the pressure-resistant component 4, the steel used must be at least 6mm thick, and materials such as cast iron, 45# steel, and aluminum alloy can be used. A pressure monitoring element 5 is sandwiched between the two sections of solid round steel to measure axial pressure data; the pressure monitoring element 5 can be a pressure sensor, etc.

[0067] It is understandable that the end of the crankshaft 18 with the positioning hole is eccentrically set with the other end of the crankshaft 18. After the spindle 9 is coaxially set with the positioning hole, the axis of the other end of the crankshaft 18 is parallel to but does not coincide with the positioning hole. Therefore, the area of ​​the pressing surface of the circular pressing plate 16 is larger than the end face area of ​​the other end of the crankshaft 18, so that it can keep the other end of the crankshaft 18 in contact with the crankshaft 18 in various states and apply a reaction force.

[0068] The pressure member 6 and the support member are connected by a bearing for rotation. In order to achieve axial force, the bearing can be a thrust ball bearing, tapered roller bearing, etc.

[0069] During the cold pressing process of rotor 2, the pressure value is measured by a pressure sensor, and the gap between rotor 2 components and core 3 required for the test can be accurately assembled through simple calculation.

[0070] The central axes of the spindle 9, the pressing part 6, the shaft hole, and the telescopic part 7 are all kept aligned to ensure that the core 3 will not tilt during the process of pressing into the rotor 2 component, thus preventing assembly errors.

[0071] The mandrel 9 is a stepped shaft, divided into different functional sections along the axial direction. The positioning shaft section 13 cooperates with the positioning hole of the crankshaft 18 of the movement 3 to realize the positioning constraint of the pressing direction. The mounting shaft section 14 preloads the rotor 2 and guides the rotor 2 when pushing it for pressing, so as to avoid the rotor 2 from deviating. Combined with the sliding shaft section 15 at the end of the positioning shaft section 13, the mandrel 9 can be kept coaxial with the shaft hole. The mandrel 9 can slide and cooperate with the shaft hole to realize the extension and retraction action, which meets the action requirements in the pressing process.

[0072] Example 2

[0073] In another typical embodiment of the present invention, such as Figures 1-8 As shown, a working method is presented.

[0074] The compressor rotor cold pressing assembly apparatus as described in Example 1 includes the following steps:

[0075] The rotor 2 is countersunk through the positioning shaft section 13 and sleeved on the outer side of the mounting shaft section 14, with one end of the rotor 2 abutting the end face of the cylinder body 1;

[0076] The mechanism 3 is positioned in the press-fitting area, the positioning shaft section 13 is coaxially engaged with the positioning hole, and the telescopic component 7 drives the cylinder 1, rotor 2 and mechanism 3 to move until the end of the crankshaft 18 of mechanism 3 away from the positioning hole contacts the abutment component;

[0077] The telescopic component 7 pushes the rotor 2 to move, and the sleeve shaft section 14 of the spindle 9 gradually retracts into the shaft hole until the rotor 2 is disengaged from the sleeve shaft section 14 and fitted onto the crankshaft 18. The telescopic component 7 is reset, and the core 3 after pressing the rotor 2 is removed.

[0078] Optionally, the diameter of the mounting shaft segment 14 is equal to that of the segment on which the rotor 2 is mounted on the crankshaft 18, and the segment on which the rotor 2 is mounted on the crankshaft 18 is kept coaxial with the spindle 9 during installation.

[0079] In addition, the pressure monitoring element 5 can be used to monitor the pressure during the pressing process. After the required pressure value is reached during the pressing process, it is determined that the rotor 2 is pressed in place and the telescopic part 7 is controlled to retract.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rotor cold-pressing assembly device for a compressor, characterized in that, include: The spindle is a stepped shaft formed by the docking of the positioning shaft section and the fitting shaft section. One end of the fitting shaft section is slidably set in the shaft hole of the cylinder body, and the end of the positioning shaft section faces the pressing component to coaxially cooperate with the positioning hole of the crankshaft of the movement. The pressing assembly is mounted above the cylinder axis and has a pressing component arranged coaxially with the positioning shaft section. The pressing component and the cylinder end face form a pressing area to accommodate the movement. The telescopic component is connected to the other end of the cylinder away from the pressure assembly and is used to adjust the distance between the cylinder and the pressure assembly. The diameter of the positioning shaft section is smaller than the diameter of the sleeve shaft section. One end of the sleeve shaft section located in the shaft hole abuts against an elastic element, and the elastic element acts axially on the end of the mandrel. The end of the sleeve shaft section away from the positioning shaft section is provided with a sliding shaft section, which slides in fit with the shaft hole and abuts against the elastic element; The mandrel is provided in multiple parts, and the mandrel is detachably connected to the cylinder body. An anti-detachment ring is provided at the end of the shaft hole facing the pressing component. The diameter of the sleeve shaft sections of different mandrels is arranged differently, and the diameter of the sliding shaft sections is equal and can fit against the inner wall of the shaft hole. The cylinder body is connected to an annular guard plate at the end facing the pressure assembly. The annular guard plate is arranged around the spindle, and the spindle and the annular guard plate together with the cylinder body end face form a bearing area that constrains the position of the rotor. The pressure-blocking assembly also includes a support member and a pressure monitoring element. The pressure monitoring element is located inside the support member, and one end of the support member is connected to the frame, while the other end is connected to the pressure-blocking component. The pressing member and the supporting member are coaxially rotatably connected. The pressing member includes a circular pressing plate and an arc-shaped guard plate arranged coaxially. The arc-shaped guard plate is connected to the edge of the circular pressing plate to form a semi-enclosed structure that adapts to the end of the crankshaft of the movement.

2. The cold press-fitting device for a compressor rotor according to claim 1, characterized by The end of the positioning shaft section facing the pressing component has a tapered tip, and a tapered transition section is provided at the joint between the positioning shaft section and the sleeve shaft section.

3. A method of working, using the cold press-fitting device for a rotor of a compressor according to any one of claims 1 to 2, characterized by, include: The rotor countersunk hole passes through the positioning shaft section and is sleeved outside the mounting shaft section, with one end of the rotor abutting the cylinder end face; The movement is positioned in the pressing area, with the positioning shaft section coaxially engaged with the positioning hole. The telescopic component drives the cylinder, rotor, and movement to move until the end of the movement crankshaft away from the positioning hole contacts the pressing component. The telescopic component pushes the rotor to move, and the sleeve shaft section of the spindle gradually retracts into the shaft hole until the rotor is disengaged from the sleeve shaft section and fitted onto the crankshaft. The telescopic component then resets, and the core after the rotor is pressed in is removed.

4. The method of claim 3, wherein, The diameter of the assembled shaft segment is equal to that of the crankshaft-mounted rotor segment, and the crankshaft-mounted rotor segment is kept coaxial with the spindle during installation.

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