Disassembling wrench for compressor impeller fixing nut

Abstract

The utility model discloses a disassembling wrench for a fixing nut of a compressor impeller, which relates to the technical field of compressors and comprises a wrench with a fixing ring at the front end and a sleeve arranged on the outer wall of the fixing ring and along the direction of a central line, the fixing ring is sleeved on the fixing nut, an inserting hole is arranged on the fixing ring, and the inserting hole is communicated with the fixing ring. The center line of the inserting hole coincides with the center line of the middle hole of the sleeve and forms a communicated stepped hole, and the hole diameter of the inserting hole is smaller than that of the middle hole. The bolt positioning rod is connected with the stepped hole in an inserted mode and connected with the stepped hole in a telescopic mode, the locking device is used for locking the bolt positioning rod, the bolt positioning rod is a stepped rod matched with the stepped hole, and the large-diameter section of the stepped rod is connected with the sleeve. And the end part of the small-diameter section of the stepped rod extends out of the insertion hole so as to be inserted into a dismounting hole in the side wall of the fixing nut. The dismounting wrench can complete dismounting of the fixing nut after the fastening glue is solidified under the condition that the structure of the impeller fixing nut is not changed.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a disassembly wrench for fixing a nut of a compressor impeller. Background Art

[0002] As an important industrial equipment, centrifugal compressors are constantly developing towards high efficiency and high pressure ratio. The aerodynamic design of the impeller 1 is crucial to the performance of the centrifugal compressor. Figure 1 As shown, impeller 1 is the only element in a centrifugal compressor that performs work on the gas medium. Driven by the high-speed rotating impeller 1, the gas medium rotates with it, thereby acquiring velocity energy that is partially converted into pressure energy by the diffuser. The impeller 1 rotates at speeds of 30,000 to 100,000 rpm, so the impeller 1 and rotor must be securely installed. During installation, the impeller 1's retaining nut 3 is connected to the tie rod 13, and thread lock is applied to the retaining nut 3 and tie rod 13 to prevent loosening. The hydraulic tensioner 4 is connected to the tensioning head 6 via a butt bolt 5, and the tensioning head 6 is connected to the tie rod 13. During installation, the hydraulic tensioner 4 is used to tighten the tie rod 13, and the cylindrical pin 2 is used to drive the retaining nut 3 into contact with the impeller 1 to achieve the tightening effect. Since the thread locker generally fully cures after 24 to 26 hours after assembly, the cured thread locker acts as a preventive measure.

[0003] However, during the removal process, the fixing nut 3 cannot be removed normally due to the effect of the solidification and loosening of the fastening glue. The fixing nut 3 must be knocked out with a hammer and a pin punch, causing the fixing nut 3 to be scrapped. In even worse cases, it cannot be knocked out and the pull rod 13 must be cut with an angle grinder, causing the impeller 1, the pull rod 13, and the fixing nut 3 to be scrapped.

[0004] In summary, how to provide a disassembly wrench that can complete the disassembly of the fixing nut after the fastening glue is cured without changing the structure of the impeller fixing nut is a problem that technicians in this field urgently need to solve. Utility Model Content

[0005] The utility model aims to provide a disassembly wrench for a compressor impeller fixing nut, which can complete the disassembly of the fixing nut after the fastening glue is cured without changing the structure of the impeller fixing nut.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A disassembly wrench for a compressor impeller fixing nut, comprising a wrench with a fixing ring at the front end, a sleeve arranged on the outer wall of the fixing ring and along the center line direction, the fixing ring being sleeved on the fixing nut, a socket being provided on the fixing ring, the socket coinciding with the center line of the center hole of the sleeve and forming a connected step hole, the aperture of the socket being smaller than the aperture of the center hole; and also comprising a pin positioning rod plugged into and telescopically connected to the step hole, and a locking device for locking the pin positioning rod, the pin positioning rod being a stepped rod cooperating with the step hole, the large diameter section of the stepped rod being connected to the sleeve, and the small diameter section end of the stepped rod extending from the socket to be inserted into the disassembly hole on the side wall of the fixing nut.

[0008] Preferably, the stepped rod includes a push rod and a T-shaped cylindrical pin. The cross-section of the lower section of the push rod in the direction perpendicular to the axis is smaller than the cross-section of the upper section. The upper section cooperates with the sleeve. The end face of the lower section of the push rod abuts against the cross rod of the T-shaped cylindrical pin, and the vertical rod is inserted into the socket.

[0009] Preferably, the locking device is a thread provided on the upper section of the push rod, and the thread of the upper section is screw-matched with the sleeve to lock the latch positioning rod;

[0010] Alternatively, the locking device further comprises a locking nut threadedly engaged with the upper portion of the upper section, and after the position of the latch positioning rod is adjusted, the locking nut is used to lock the latch positioning rod.

[0011] Preferably, a compression spring is mounted on the small-diameter section of the step rod, and the compression spring is located between the step surface of the step hole and the step surface of the step rod.

[0012] Preferably, a handle perpendicular to the axis of the push rod is provided on the top of the push rod; a rubber sleeve is provided on the bottom side wall of the T-shaped cylindrical pin; and a through hole is provided on the wrench.

[0013] Preferably, magnets that attract each other are provided in the disassembly hole of the fixing nut and at the end of the stepped rod.

[0014] Preferably, it further comprises a reminder device for detecting whether the latch positioning rod is inserted into the bottom of the disassembly hole, the reminder device comprising:

[0015] a contact piece provided on the bottom surface of the disassembly hole;

[0016] A contact point provided on the bottom surface of the vertical rod and cooperating with the contact piece;

[0017] A reminder mechanism is connected to the contact point and is used to send a reminder signal when the contact point contacts the contact piece.

[0018] Preferably, it also includes multiple adjustment arcs arranged inside the fixed ring, the adjustment arc is connected to the fixed ring along the circumferential direction through an adjusting screw, the spacing between the adjustment arc and the fixed ring is adjustable, and the adjustment arc facing the socket is provided with a socket aligned with the socket.

[0019] Preferably, the center line of the wrench passes through the center of the fixing ring, and the wrench includes an outer sleeve connected to the fixing ring and an inner sleeve fitted with the outer sleeve, and the outer sleeve is slidably connected to the inner sleeve.

[0020] Preferably, an annular groove is provided on the outer wall of the fixing ring, the wrench is slidably connected to the annular groove, and a plurality of clamping holes are provided on the annular groove, and the wrench is clamped into one of the clamping holes.

[0021] The utility model provides a disassembly wrench for fixing a compressor impeller nut. The front end of the wrench has a fixing ring that fits over the fixing nut to facilitate engagement with the fixing nut. A sleeve is disposed on the outer wall of the fixing ring, with the sleeve's axis oriented along the centerline of the fixing ring. The sleeve has a central hole, the fixing ring has an insertion hole, and the fixing nut has a disassembly hole on its side wall. The centerlines of the central hole, insertion hole, and disassembly hole coincide. The insertion hole and the sleeve form a connected stepped hole. The insertion hole has a smaller diameter than the central hole, forming a stepped surface at the junction of the central hole and insertion hole. The latch positioning rod is a stepped rod. The large-diameter section of the stepped rod fits snugly into the central hole of the sleeve, while the small-diameter section of the stepped rod fits snugly into the insertion hole of the fixing ring. The stepped rod is pluggably connected to the stepped hole, telescopically moving along the axial direction of the stepped hole. The length of the stepped rod's end extending from the insertion hole is adjustable. The end of the stepped rod can extend from the insertion hole of the fixing ring and be inserted into the disassembly hole of the fixing nut, thereby achieving positioning of the disassembly wrench and the fixing nut. After the extension length of the step rod is determined, the locking device locks the position of the latch positioning rod.

[0022] The disassembly wrench for the compressor impeller fixing nut provided by the utility model does not require any changes to other existing structures of the centrifugal compressor and can directly replace the existing disassembly tools; the impeller fixing nut can be disassembled without the aid of other tools, which is convenient and quick, and the assembly and disassembly will not cause damage to the product parts; it is conducive to batch assembly production, and can improve the assembly and disassembly efficiency while effectively reducing the scrapping of parts due to disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of a typical method of using a hydraulic tensioner in conjunction with a cylindrical pin to move a fixing nut in the prior art;

[0025] Figure 2 A schematic structural diagram of a disassembly wrench for fixing a nut of a compressor impeller provided in a specific embodiment of the present invention;

[0026] Figure 3 is a cross-sectional view of a disassembly wrench for fixing a nut on a compressor impeller;

[0027] Figure 4 Schematic diagram of the use of a disassembly wrench for fixing the compressor impeller nut.

[0028] Reference numerals:

[0029] Impeller 1, cylindrical pin puller 2, fixing nut 3, hydraulic tensioner 4, docking bolt 5, tensioning head 6, wrench 7, push rod 8, handle 9, locking nut 10, wrench T-shaped cylindrical pin 11, compression spring 12, pull rod 13. DETAILED DESCRIPTION

[0030] The core of the utility model is to provide a disassembly wrench for the compressor impeller fixing nut, which can complete the disassembly of the fixing nut after the fastening glue is cured without changing the impeller fixing nut structure.

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Please refer to Figures 2 to 4 , Figure 2 A schematic structural diagram of a disassembly wrench for fixing a compressor impeller nut provided in a specific embodiment of the present invention; Figure 3 is a cross-sectional view of a disassembly wrench for fixing a nut on a compressor impeller; Figure 4 Schematic diagram of the use of a disassembly wrench for fixing the compressor impeller nut.

[0033] In a specific embodiment, the disassembly wrench for the compressor impeller fixing nut provided by the utility model includes a wrench 7 with a fixing ring at the front end, a sleeve arranged on the outer wall of the fixing ring and along the center line direction, the fixing ring is sleeved on the fixing nut 3, and a socket is provided on the fixing ring, the socket coincides with the center line of the middle hole of the sleeve and forms a connected step hole, the aperture of the socket is smaller than the aperture of the middle hole; it also includes a pin positioning rod that is plugged into the step hole and telescopically connected to the step hole, and a locking device for locking the pin positioning rod, the pin positioning rod is a stepped rod that cooperates with the step hole, the large diameter section of the stepped rod is connected to the sleeve, and the small diameter section end of the stepped rod extends from the socket to be inserted into the disassembly hole on the side wall of the fixing nut 3.

[0034] In the above structure, the wrench for removing the compressor impeller fixing nut includes a wrench 7, a sleeve, a latching rod, and a locking device. The front end of the wrench 7 has a fixing ring that fits over the fixing nut 3 to facilitate docking with the fixing nut 3. Preferably, the fixing ring is an annular structure with a rubber pad provided on the inner side of the fixing ring. The fixing ring tightly embraces the fixing nut 3, increasing the friction between the fixing ring and the fixing nut 3. The sleeve is disposed on the outer wall of the fixing ring, with the axis of the sleeve aligned with the centerline of the fixing ring. The sleeve has a central hole, the fixing ring has a socket, and the side wall of the fixing nut 3 has a removal hole. The centerlines of the central hole, the socket, and the removal hole coincide. The socket and the sleeve form a connected stepped hole. The diameter of the socket is smaller than that of the central hole, forming a stepped surface at the junction of the central hole and the socket. The latching rod is a stepped rod. The large-diameter section of the stepped rod fits into the central hole of the sleeve, and the small-diameter section of the stepped rod fits into the socket of the fixing ring. The stepped rod is pluggably connected to the stepped hole, allowing it to telescope along the axial direction of the stepped hole. The length of the stepped rod's end extending from the hole is adjustable. The end of the stepped rod can be extended from the hole in the retaining ring and inserted into the removal hole of the retaining nut 3. The removal wrench 7 is positioned with the retaining nut 3. Once the extended length of the stepped rod is determined, a locking device locks the position of the latch positioning rod.

[0035] As attached Figure 4 As shown, the specific operation method of the disassembly wrench for the compressor impeller fixing nut includes:

[0036] Slide the fixing ring of the wrench 7 onto the fixing nut 3, and then rotate the upper end of the large-diameter section of the step rod to drive the lower end of the small-diameter section of the step rod into the disassembly hole of the fixing nut 3. When the lower end of the small-diameter section of the step rod enters the disassembly hole, rotate the locking device to lock the step rod, and then rotate the wrench 7 to disassemble.

[0037] The disassembly wrench for the compressor impeller fixing nut provided by the utility model does not require any changes to other existing structures of the centrifugal compressor and can directly replace the existing disassembly tools; the impeller 1 fixing nut 3 can be disassembled without the aid of other tools, which is convenient and quick, and the assembly and disassembly will not cause damage to the product parts; it is conducive to batch assembly production, and can improve the assembly and disassembly efficiency while effectively reducing the scrapping of parts due to disassembly.

[0038] Based on the above-mentioned specific embodiments, the stepped rod includes a push rod 8 and a T-shaped cylindrical pin 11. The cross-section of the lower section of the push rod 8 in the direction perpendicular to the axis is smaller than the cross-section of the upper section. The upper section cooperates with the sleeve. The end face of the lower section of the push rod 8 abuts against the horizontal rod of the T-shaped cylindrical pin 11, and the vertical rod is inserted into the socket.

[0039] In one embodiment, the push rod 8 comprises an upper section and a lower section. The diameter of the upper section is larger than that of the lower section. The upper section is adapted to the size of the central hole of the sleeve. The push rod 8 and the sleeve are aligned to reduce the shaking of the stepped rod in the sleeve. The diameter of the lower section is smaller than that of the central hole to prevent the lower section from colliding with the inner wall of the sleeve and causing jamming.

[0040] The T-shaped cylindrical pin 11 comprises a horizontal rod and a vertical rod. The axial direction of the vertical rod is aligned with the axial direction of the socket, and the vertical rod is inserted into the socket. The horizontal rod is perpendicular to the vertical rod and its length is greater than the diameter of the socket. The horizontal rod is located above the stepped surface, limiting the stepped rod and preventing it from falling out of the socket. At the same time, the lower section abuts the upper surface, with a large contact area, preventing the lower end face of the push rod 8 from slipping from the upper end face of the T-shaped cylindrical pin 11, causing the push rod 8 to misalign with the T-shaped cylindrical pin 11.

[0041] It should be noted that the lower end surface of the push rod 8 is connected to the crossbar of the T-shaped cylindrical pin 11, and the connection length is long, and the connection is convenient and firm.

[0042] Based on the aforementioned embodiments, the locking mechanism comprises threads on the upper section of push rod 8, which engage with the sleeve to lock the latch pin. Adjusting the length of engagement between the threads and the sleeve's internal threads adjusts the extension of the lower end of the T-shaped cylindrical pin 11, locking the latch pin and sleeve in place. This simple structure eliminates the need for additional locking components.

[0043] Alternatively, the locking device further includes a locking nut 10 threadedly engaged with the upper portion of the upper section. Once the latch rod is positioned correctly, the locking nut 10 is used to lock the latch rod. The threaded engagement between the latch rod and the sleeve, combined with the threaded engagement between the locking nut 10 and the latch rod, creates a double-threaded locking mechanism, preventing the latch rod and sleeve from rotating relative to each other and becoming loose, providing a more secure and reliable locking mechanism.

[0044] On the basis of the above-mentioned specific embodiments, a compression spring 12 is mounted on the small diameter section of the step rod, and the compression spring 12 is located between the step surface of the step hole and the step surface of the step rod. Figure 3 As shown, compression spring 12 functions as a telescopic positioning mechanism. As the stepped rod moves toward the socket, compression spring 12 deforms and increases its elastic force. When T-shaped cylindrical pin 11 is disconnected from push rod 8, and the locking nut 10, sleeve, and latch rod are loosened, the elastic force of compression spring 12 recedes, pushing T-shaped cylindrical pin 11 back into the socket, resetting it. This allows the retaining ring to be smoothly fitted onto retaining nut 3 the next time, protecting T-shaped cylindrical pin 11.

[0045] Based on the above-mentioned specific embodiments, a handle 9 is provided at the top of the push rod 8, perpendicular to its axis. This allows the operator to rotate the handle 9 to drive the push rod 8 to rotate, thereby extending or retracting the latch positioning rod, thereby engaging the removal hole of the fixing nut 3 and driving the fixing nut 3 to rotate, thereby removing the fixing nut 3. Preferably, a through hole is provided at the top of the push rod 8, into which the handle 9 is inserted. The handle 9 is detachably connected to the push rod 8, and when not in use, the handle 9 is removed from the push rod 8 for easy storage.

[0046] In the above embodiment, the operator can more easily grasp handle 9 and apply force to rotate push rod 8. The direction of the force is perpendicular to the axis of push rod 8. The handle 9, being perpendicular to the axis, transmits force more efficiently, thus reducing force loss. This simple and effective method of transmitting and converting motion makes operation more labor-saving and precise.

[0047] Based on the aforementioned specific embodiments, a rubber sleeve is provided on the bottom sidewall of the T-shaped cylindrical pin 11. The rubber sleeve follows the T-shaped cylindrical pin 11 and is inserted into the removal hole of the fixing nut 3. The rubber sleeve contacts the inner wall and bottom surface of the removal hole. During the design process, the material and hardness of the rubber sleeve, as well as the method of fixing it to the T-shaped cylindrical pin 11, need to be considered to ensure that the rubber sleeve maintains good performance after long-term use. Furthermore, the wear resistance and aging resistance of the rubber sleeve are also factors that need to be considered during the design to ensure its reliable operation in various environmental conditions.

[0048] In the above embodiment, the rubber sleeve can reduce direct metal contact between the T-shaped cylindrical pin 11 and the inner wall of the disassembly hole, thereby reducing wear and extending service life; the elasticity of the rubber can absorb the impact force during the disassembly process and reduce damage to the components; the rubber sleeve can increase the friction between the T-shaped cylindrical pin 11 and the inner wall of the disassembly hole, preventing the T-shaped cylindrical pin 11 from slipping out of the disassembly hole, making the disassembly process smoother and reducing the difficulty of disassembly.

[0049] On the basis of the above-mentioned various specific embodiments, the wrench 7 is provided with through holes. For example, four through holes are provided at the wrench 7 to reduce the weight of the wrench 7 and facilitate operation.

[0050] On the basis of the above-mentioned specific embodiments, magnets that attract each other are provided in the disassembly hole of the fixing nut 3 and at the end of the stepped rod.

[0051] In one embodiment, magnets are positioned within the removal hole of the fixing nut 3 and at the end of the stepped rod, allowing for quick removal and installation of the end of the stepped rod and the removal hole. The magnets provide a strong attraction force, securing the fixing nut 3 and the stepped rod together. Furthermore, due to the properties of the magnets, this connection allows for quick removal and reuse, making it ideal for applications where the removal wrench 7 and fixing nut 3 require frequent installation and removal.

[0052] The magnet's adsorption force can be adjusted by adjusting the spacing between the magnets or using different types of magnets to accommodate different load requirements. Furthermore, the choice of magnetic material is also important. Commonly used magnetic materials include neodymium iron boron and ferrite, which have different magnetic properties and can be selected based on the actual application requirements.

[0053] During design, the magnet's magnetic circuit design must also be considered to ensure effective magnetic force transmission and adsorption. For example, a Halbach array can be used to optimize the magnet's magnetic field distribution, enhancing the magnetic field on one side of the array while nearly canceling it out on the other side. This array is characterized by ideally generating a near-ideal unilateral magnetic field on one side while leaving the field near zero on the other side, enhancing the field strength in a single direction and thus improving magnetic adsorption.

[0054] Based on the above specific embodiments, a reminder device for detecting whether the latch positioning rod is inserted into the bottom of the disassembly hole is further included. The reminder device includes:

[0055] A contact piece provided on the bottom surface of the disassembly hole;

[0056] A contact point provided on the bottom surface of the vertical rod and cooperating with the contact piece;

[0057] A reminder mechanism connected to the contact point, used to send a reminder signal when the contact point contacts the contact piece.

[0058] In practical applications, the reminder device is a sensor used to detect whether the latch rod is fully inserted into the removal hole of the fixing nut 3. This device consists of three main parts: a contact piece, a contact point, and a reminder mechanism. The contact piece is located on the bottom surface of the removal hole and is triggered when the latch rod is fully inserted. The contact point is located on the bottom surface of the vertical rod and cooperates with the contact piece. When the latch rod is inserted into place, the contact point and the contact piece contact. The reminder mechanism is connected to the contact point. Once the contact point and the contact piece contact, the reminder mechanism will issue a prompt signal to inform the operator that the latch rod has been fully inserted. The reminder mechanism can be audible (such as a buzzer), visual (such as an LED light), tactile (such as a vibration motor), or other types of indicators, depending on the design and application requirements. The function of the reminder device is to provide immediate feedback to ensure the correctness and safety of operation, thereby reducing operating errors and improving work efficiency.

[0059] The working principle of the reminder device is based on mechanical contact and signal transmission. The following are the detailed steps of its workflow:

[0060] When the latch positioning rod is inserted into the disassembly hole of the fixing nut 3, it moves downward along the hole until its bottom surface contacts the bottom surface of the disassembly hole.

[0061] A contact piece is provided on the bottom surface of the removal hole. When the latch positioning rod is fully inserted into place, the contact point on its bottom surface will make physical contact with the contact piece.

[0062] The contact between the contact point and the contact blade is designed to close a circuit. Before the contact, the circuit may be open; once the contact point and the contact blade come into contact, the circuit is closed.

[0063] After the circuit is closed, the reminder mechanism receives the current, is activated, and sends out a reminder signal.

[0064] The purpose of the prompt signal is to immediately inform the operator that the latch positioning rod has been fully inserted. This signal can be auditory (such as a beep), visual (such as a flashing light), tactile (such as vibration) or other forms of feedback.

[0065] Once the latch positioning rod is pulled out, the contact is separated from the contact piece, the circuit is disconnected, and the reminder device stops sending signals and waits for the next trigger.

[0066] The reminder mechanism consists of a simple switch circuit, which can be a micro switch, reed switch, or other type of mechanical switch. It is designed to ensure that the circuit is closed and the reminder mechanism is triggered only when the latch retaining rod is fully inserted. This improves the accuracy and safety of the operation, especially in situations where vision is limited when inserting the latch retaining rod into the removal hole or when it is necessary to ensure that the latch retaining rod is correctly assembled.

[0067] On the basis of the above-mentioned specific embodiments, it also includes multiple adjustment arcs arranged inside the fixed ring. The adjustment arc is connected to the fixed ring along the circumferential direction through an adjusting screw. The spacing between the adjustment arc and the fixed ring is adjustable. A socket aligned with the socket is provided on the adjustment arc facing the socket.

[0068] In practical applications, the aperture of the fixing ring is not limited to the diameter, and the aperture is determined according to the size of the stretching head 6 tooling, so as to be suitable for removing fixing nuts 3 of different diameters.

[0069] In another embodiment, the interior of the retaining ring features multiple adjustable arc segments, referred to as adjustment arcs. These segments form a ring structure that fits over and secures the retaining nut 3. The adjustment arc is positioned within the retaining ring and connected to the retaining ring via one or more screws, which can be threaded rods, for adjusting the position of the adjustment arc along the circumferential direction. The threaded screws connect the two, allowing the adjustment arc to be circumferentially fixed to the retaining ring. By rotating the adjustment screws, the spacing between the adjustment arc and the retaining ring can be adjusted, enabling fine-tuning and individual adjustments at different positions. An adjustment arc on the retaining ring is specifically designed to align with a specific receptacle. This adjustment arc has a socket located directly opposite the receptacle, aligned with the receptacle, and its shape and size match the desired latch positioning rod. When the adjustment arc is moved to the appropriate position, the socket is precisely aligned with the receptacle, facilitating insertion of the latch positioning rod.

[0070] In the above embodiment, there is no need to replace the disassembly wrench 7 for fixing nuts 3 of different sizes. The size and shape of the annular structure that holds the fixing nut 3 can be accurately controlled by adjusting the arc and the adjusting screw. The scope of use is wide and the use is more convenient and flexible.

[0071] Based on the above specific embodiments, the center line of the wrench 7 passes through the center of the fixing ring. The wrench 7 includes an outer sleeve connected to the fixing ring and an inner sleeve fitted with the outer sleeve. The outer sleeve and the inner sleeve are slidably connected.

[0072] In one specific embodiment, the wrench 7 is inserted axially into the tensioning head 6 fixture, connected to the retaining ring and operated, and rotated radially and circumferentially to remove the retaining nut 3. The centerline of the wrench 7 refers to the axis of the wrench 7 and serves as the primary reference line for the rotation and force application of the wrench 7. The centerline of the wrench 7 passes through the center point of the retaining ring. This design ensures that when the wrench 7 rotates, its force application point is located at the center of the retaining ring, thereby achieving uniform and effective force transmission.

[0073] Wrench 7 consists of two parts: an outer sleeve, which is directly connected to the retaining ring. The other part of wrench 7 is an inner sleeve, which fits within the outer sleeve. The outer and inner sleeves are connected by a sliding mechanism, allowing them to slide relative to each other, allowing the length or shape of wrench 7 to be adjusted as needed. This sliding connection may be achieved through threads, snaps, or other mechanical devices to ensure that wrench 7 remains stable and secure when force is applied.

[0074] In the above embodiment, the wrench 7 may be used in situations where it is necessary to operate in a tight space or in a hard-to-reach location, or when the length of the wrench 7 needs to be adjusted to suit different working conditions. By combining the outer sleeve and the inner sleeve, the user can adjust the length and adaptability of the wrench 7 as needed.

[0075] On the basis of the above-mentioned specific embodiments, an annular groove is provided on the outer wall of the fixing ring, and the wrench 7 is slidably connected to the annular groove. The annular groove is provided with a plurality of clamping holes, and the wrench 7 selects one of the clamping holes for clamping.

[0076] In one specific embodiment, a retaining ring is slidably connected to the wrench 7, allowing the wrench 7 to be precisely adjusted on the retaining ring to accommodate different operational requirements. The retaining ring is an annular component with a continuous annular groove on its outer wall, known as a chute. The chute acts as a guide rail, allowing the wrench 7 to slide along it. The wrench 7 is designed with a component that can be inserted into the annular chute, allowing the wrench 7 to slide freely along the chute, allowing the wrench 7 to be adjusted to accommodate different operational requirements.

[0077] On the annular chute, a number of clamping holes are provided at equal or unequal intervals. These clamping holes are used to limit the sliding of the wrench 7 and can fix the wrench 7 at a specific position. The wrench 7 can slide to any clamping hole on the annular chute and clamp therewith, thereby fixing the position of the wrench 7. The specific clamping method can be that the clamping hole is a cross hole, and the connecting end of the wrench 7 has a transverse clamping shaft, and the direction of the clamping shaft is adjusted to achieve connection, positioning and disassembly with the cross hole. In this way, the wrench 7 can be fixed in one of multiple preset positions to adapt to different usage scenarios. The connection between the wrench 7 and the fixing ring by mechanical snap connection is only a preferred embodiment, not the only one. It can also be achieved by threaded fastening or other fastening methods. For example, a plurality of threaded holes are provided on the side wall of the fixing ring in the circumferential direction, and the connecting end of the wrench 7 has a thread that matches the threaded hole, and the wrench 7 is connected to the threaded hole at the appropriate position.

[0078] In the above embodiment, the operator can adjust the position of the wrench 7 as needed and fix it in the appropriate position through the clamping hole to ensure the accuracy and convenience of operation. By selecting different clamping holes, the operator can quickly adjust the position of the wrench 7 to adapt to specific working conditions.

[0079] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0080] The above is a detailed introduction to the disassembly wrench for the compressor impeller fixing nut provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A disassembly wrench for fixing the impeller nut of a compressor, characterized in that: The invention comprises a wrench (7) with a fixing ring at the front end, a sleeve arranged on the outer wall of the fixing ring and along the center line direction, the fixing ring is sleeved on the fixing nut (3), the fixing ring is provided with a socket, the socket coincides with the center line of the center hole of the sleeve and forms a connected step hole, the aperture of the socket is smaller than the aperture of the center hole; and further comprises a pin positioning rod plugged into the step hole and telescopically connected to the step hole, and a locking device for locking the pin positioning rod, the pin positioning rod is a stepped rod matched with the step hole, the large diameter section of the stepped rod is connected to the sleeve, and the small diameter section end of the stepped rod extends from the socket to be inserted into the disassembly hole on the side wall of the fixing nut (3).

2. The disassembly wrench for fixing the compressor impeller nut according to claim 1, characterized in that: The step rod comprises a push rod (8) and a T-shaped cylindrical pin (11); the cross section of the lower section of the push rod (8) is smaller than the cross section of the upper section in the direction perpendicular to the axis; the upper section cooperates with the sleeve; the end face of the lower section of the push rod (8) abuts against the cross rod of the T-shaped cylindrical pin (11); and the vertical rod is inserted into the socket.

3. The disassembly wrench for fixing the compressor impeller nut according to claim 2, characterized in that: The locking device is a thread provided on the upper section of the push rod (8), and the thread of the upper section is screw-matched with the sleeve to lock the latch positioning rod; Alternatively, the locking device further comprises a locking nut (10) threadedly engaged with the upper portion of the upper section, and after the position of the latch positioning rod is adjusted, the locking nut (10) is used to lock the latch positioning rod.

4. The disassembly wrench for fixing the compressor impeller nut according to claim 3, characterized in that: A compression spring (12) is sleeved on the small-diameter section of the step rod, and the compression spring (12) is located between the step surface of the step hole and the step surface of the step rod.

5. The disassembly wrench for fixing the compressor impeller nut according to claim 2, characterized in that: The top of the push rod (8) is provided with a handle (9) perpendicular to the axis direction thereof; the bottom side wall of the T-shaped cylindrical pin (11) is provided with a rubber sleeve; and the wrench (7) is provided with a through hole.

6. The disassembly wrench for fixing the compressor impeller nut according to claim 1, characterized in that: The disassembly hole of the fixing nut (3) and the end of the stepped rod are provided with magnets that attract each other.

7. The disassembly wrench for fixing the compressor impeller nut according to claim 5, characterized in that: It also includes a reminder device for detecting whether the latch positioning rod is inserted into the bottom of the disassembly hole, and the reminder device includes: a contact piece provided on the bottom surface of the disassembly hole; A contact point provided on the bottom surface of the vertical rod and cooperating with the contact piece; A reminder mechanism is connected to the contact point and is used to send a reminder signal when the contact point contacts the contact piece.

8. The disassembly wrench for fixing the compressor impeller nut according to any one of claims 1 to 7, characterized in that: It also includes multiple adjustment arcs arranged inside the fixed ring, the adjustment arcs are connected to the fixed ring along the circumferential direction through adjusting screws, the spacing between the adjustment arcs and the fixed ring is adjustable, and the adjustment arc facing the socket is provided with a socket aligned with the socket.

9. The disassembly wrench for fixing the compressor impeller nut according to claim 8, characterized in that: The center line of the wrench (7) passes through the center of the fixing ring. The wrench (7) comprises an outer sleeve connected to the fixing ring and an inner sleeve fitted with the outer sleeve. The outer sleeve is slidably connected to the inner sleeve.

10. The disassembly wrench for fixing the compressor impeller nut according to claim 8, characterized in that: An annular slot is provided on the outer wall of the fixing ring, and the wrench (7) is slidably connected to the annular slot. A plurality of clamping holes are provided on the annular slot, and the wrench (7) is clamped into one of the clamping holes.

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