Puller for high-pressure pump assembly of aero-engine fuel pump and using method of puller

Abstract

The invention discloses a puller for a high-pressure pump assembly of an aero-engine fuel pump and a using method thereof.The puller comprises a clamping mechanism, a support and a jacking structure, the clamping mechanism comprises two clamping bodies with symmetrical structures, and each clamping body is provided with a semicircular through hole with the diameter larger than that of a circular ring part of a conical bearing; annular bulges matched with the annular grooves of the circular ring part are respectively arranged on the inner walls of the semicircular through holes; the support comprises a cross beam and two supporting connecting pieces. The upper end of the supporting connecting piece is connected to the cross beam in a sliding mode and can be positioned on the cross beam. The lower ends of the support connecting pieces are fixedly connected with the upper ends of the clamping bodies respectively; the jacking structure is located between the two supporting connecting pieces, and the jacking structure is detachably connected with the cross beam; the jacking structure faces the conical bearing and can move in the direction close to or away from the conical bearing under the action of external force. The device has the advantages that the structure is simple, the operation is simple, and the conical bearing cannot be damaged.

Description

Technical Field

[0001] The invention relates to the technical field of engine disassembly equipment, in particular to a puller for a high-pressure pump assembly of an aircraft engine fuel pump and a use method thereof. Background Art

[0002] The high-pressure pump assembly of a certain aircraft engine fuel pump has a tapered bearing 2, and the top end of the tapered bearing 2 is fixed by a locking nut 14. When disassembly maintenance is required, the locking nut 14 needs to be removed first, and then the tapered bearing 2 is pulled out.

[0003] like Figure 1 As shown, the high-pressure pump assembly includes a high-pressure pump housing 1, a tapered shaft 11, a tapered bearing 2 disposed on the shaft 11, a gasket 13, and a locking nut 14. The tapered bearing 2 includes a tapered bearing upper section and a tapered bearing lower section, the tapered bearing lower section is a gear portion 21, and the tapered bearing upper section is a circular ring portion 22 with an annular groove 221 on the outer side. The circular ring portion 22 is coaxially fixedly connected to the upper end of the gear portion 21.

[0004] The existing disassembly process is as follows: fix the tapered bearing 2 and the rotating shaft 11 to rotate by using a tool such as a wrench, and then remove the locking nut 14 at the top of the rotating shaft 11 by using a wrench.

[0005] The tapered bearing 2 is then removed. However, since there is only a slight gap between the lower end of the tapered bearing 2 and the upper surface of the high-pressure pump housing 1, ordinary tools cannot remove it, and using tools such as crowbars can easily damage the tapered bearing 2. Summary of the invention

[0006] The purpose of the present invention is to provide a puller for a high-pressure pump assembly of an aircraft engine fuel pump and a method for using the puller, which has a simple structure, is easy to operate and does not damage the tapered bearing, in view of the deficiencies of the prior art.

[0007] The technical purpose of the present invention is achieved by the following technical solutions: A puller for a high-pressure pump assembly of an aircraft engine fuel pump, comprising a clamping mechanism, a bracket and a top-pressing structure, wherein the clamping mechanism comprises two structurally symmetrical clamping bodies, the clamping bodies having a semicircular through hole with a diameter larger than the diameter of the annular portion of a tapered bearing; the inner walls of the semicircular through holes are respectively provided with annular protrusions that cooperate with the annular grooves of the annular portion; the bracket comprises a crossbeam and two supporting connectors; the upper end of the supporting connector is slidably connected to the crossbeam and can be positioned on the crossbeam; the lower ends of the supporting connectors are respectively fixedly connected to the upper ends of the clamping bodies; the top-pressing structure is located between the two supporting connectors, and the top-pressing structure is detachably connected to the crossbeam; the top-pressing structure faces the tapered bearing, and the top-pressing structure can move in a direction close to or away from the tapered bearing under the action of an external force.

[0008] Preferably, a threaded through hole passing through the upper and lower ends of the crossbeam is provided at the center thereof, and the top pressure structure includes a screw structure cooperating with the threaded through hole; through grooves are symmetrically provided at both ends of the crossbeam; the upper section of the supporting connecting piece is an upper threaded section, and the upper end of the upper threaded section passes through the through groove to connect with a clamping nut; the screw structure moves toward the direction approaching the tapered bearing under the action of external force, and its lower end is pressed against the top end of the rotating shaft of the high-pressure pump assembly.

[0009] Preferably, the length of the upper thread segment is greater than the height of the through groove, and the diameter of the middle section of the support connector close to the upper thread segment is less than or equal to the diameter of the upper thread segment.

[0010] Preferably, the supporting connector is detachably fixedly connected to the clamping body.

[0011] Preferably, the lower section of the supporting connector is a lower threaded section, and the upper end of the clamping body is provided with a threaded hole matched with the lower threaded section; the supporting connector and the clamping body are threadedly connected.

[0012] A force-adding column is arranged on one side of the clamping body away from the semicircular through hole.

[0013] The screw structure comprises an operating portion at an upper end, a threaded portion at a middle section and a tightening portion at a lower end, wherein the tightening portion is conical.

[0014] Preferably, the clamping body comprises a first clamping body and a second clamping body, and the first clamping body and the second clamping body are connected to each other via a clamping body connecting structure.

[0015] Preferably, the clamping body connection structure comprises connecting through holes respectively arranged on both sides of the semicircular through holes of the first clamping body and the second clamping body, and fastening bolts are installed in the connecting through holes; the first clamping body and the second clamping body are connected by the fastening bolts.

[0016] A method for using a puller for a high-pressure pump assembly of an aircraft engine fuel pump comprises the following steps: Step 1, loosen the fastening bolts of the clamping body to separate the first clamping body and the second clamping body; Loosen the clamping nut and adjust the distance between the crossbeam and the clamping body so that the crossbeam is disposed on the upper side of the top end of the rotating shaft of the high-pressure pump assembly, and the tightening portion of the screw structure is disposed on the upper side of the top end of the rotating shaft of the high-pressure pump assembly; Step 2, after the semicircular annular protrusion between the first clamping body and the second clamping body is embedded in the annular groove of the annular portion of the tapered bearing; tighten the fastening bolts so that the first clamping body and the second clamping body tightly embrace the annular portion of the tapered bearing; Step 3, controlling the screw structure to move downward through the operating part of the screw structure, so that the pressing part of the screw structure is pressed against the top end of the rotating shaft of the high-pressure pump assembly; Step 4: Control the screw structure to continue to apply downward force to the top of the rotating shaft, drive the first clamping body and the second clamping body to move upward, and pull the tapered bearing out of the rotating shaft.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention includes a clamping mechanism, a bracket and a top-pressing structure, wherein the clamping mechanism includes two clamping bodies arranged opposite to each other, each of which has a semicircular through hole with a diameter larger than the diameter of the annular portion of the tapered bearing; the inner walls of the semicircular through holes of the clamping bodies are respectively provided with annular protrusions matching the annular grooves of the annular portion. When one side of the semicircular through holes of the two clamping bodies is brought close to each other, the semicircular annular protrusions are embedded in the annular grooves of the annular portion. Then, the clamping mechanism is driven to move upward by the top-pressing structure to pull the tapered bearing out of the rotating shaft. The adoption of this technical measure has the advantages of simple structure, convenient operation, and can avoid damage to the tapered bearing.

[0018] 2. The clamping body of the present invention is provided with a force-adding column on one side away from the semicircular through hole. By adopting this technical measure, external force can be applied through a steel pipe or the like cooperating with the force-adding column, so that the clamping body will not rotate or have other problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the structure of a high-pressure pump assembly; Figure 2 yes Figure 1 Schematic diagram of the structure of the medium and high pressure pump housing and shaft; Figure 3 yes Figure 2 Schematic diagram of the structure of the tapered bearing; Figure 4 It is a schematic diagram of the structure of the present invention; Figure 5 yes Figure 4 Middle clamping mechanism; Figure 6 yes Figure 4 middle beam; Figure 7 yes Figure 4 Middle support connector; Reference numerals: 1—high-pressure pump housing; 11—rotating shaft; 12—top groove; 13—gasket; 14—locking nut; 2—conical bearing; 21—gear portion; 22—annular portion; 221—annular groove; 3—clamping mechanism; 31—first clamping body; 32—second clamping body; 33—semicircular through hole; 34—annular protrusion; 35—threaded hole; 36—connecting through hole; 4—Stand; 41—crossbeam; 411—through groove; 412—threaded through hole; 42—support connecting piece; 421—upper threaded section; 422—middle section of the support connecting piece; 423—lower threaded section; 43—tightening bolt; 5—screw structure; 51—operating part; 52—threaded part; 53—tightening part; 6—fastening bolts; 7—Strengthening column. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] like Figure 1 — Figure 7As shown, a puller for a high-pressure pump assembly of an aircraft engine fuel pump includes a clamping mechanism 3, a bracket 4 and a top-pressing structure. The clamping mechanism 3 includes two clamping bodies arranged opposite to each other, each of which has a semicircular through hole 33 with a diameter larger than the diameter of the annular portion 22 of the tapered bearing 2; the inner walls of the semicircular through holes 33 are respectively provided with annular protrusions 34 that match the annular grooves 221 of the annular portion 22; the bracket 4 includes a crossbeam 41 and two supporting connectors 42; the upper end of the supporting connector 42 is slidably connected to the crossbeam 41 and can be positioned on the crossbeam 41; the lower end of the supporting connector 42 is respectively fixedly connected to the upper end of the clamping body; the top-pressing structure is located between the two supporting connectors 42, and the top-pressing structure is detachably connected to the crossbeam 41; the top-pressing structure faces the tapered bearing 2, and the top-pressing structure can move toward or away from the tapered bearing 2 under the action of an external force. The adoption of this technical measure has the advantages of simple structure, convenient operation, and can avoid damage to the tapered bearing 2.

[0024] like Figure 4 , Figure 5 As shown, the clamping mechanism 3 includes two symmetrical clamping bodies. Specifically, the clamping mechanism 3 includes a first clamping body 31 and a second clamping body 32, and the first clamping body 31 and the second clamping body 32 are arranged opposite to each other; the first clamping body 31 and the second clamping body 32 respectively have a semicircular through hole 33 with a diameter larger than the diameter of the annular portion 22 of the tapered bearing 2, and the inner wall of the semicircular through hole 33 is respectively provided with a semicircular annular protrusion 34 that matches the annular groove 221 of the annular portion 22. When one side of the semicircular through hole 33 of the first clamping body 31 and the second clamping body 32 are close to each other, the semicircular annular protrusion 34 is embedded in the annular groove 221 of the annular portion 22. The adoption of this technical measure has a simple structure and can avoid damage to the tapered bearing 2.

[0025] like Figure 4 , Figure 6 , Figure 7 As shown, the bracket 4 includes a cross beam 41 and two support connectors 42; the upper end of the support connector 42 is slidably connected to the cross beam 41 and can be positioned on the cross beam 41; the lower end of the support connector 42 is fixedly connected to the upper end of the clamping body. In actual use, the structure of the cross beam 41 and the support connector 42 can be various, for example, a slide groove is provided on the outer side of the cross beam 41, and a slider and a locking structure that cooperate with the slide groove are provided on the upper end of the support connector 42. In this embodiment, the support connector 42 includes a first support connector and a second support connector, the lower end of the first support connector is fixedly connected to the upper end of the first clamping body 31, and the second support connector is fixedly connected to the upper end of the second clamping body 32.

[0026] like Figure 4As shown, the pressing structure is located between two supporting connectors 42 and is detachably connected to the crossbeam 41 ; the pressing structure faces the tapered bearing 2 and can move toward or away from the tapered bearing 2 under the action of external force. In actual use, a threaded through hole 412 is provided at the center of the crossbeam 41, which passes through its upper and lower ends. The top pressure structure includes a screw structure 5 that cooperates with the threaded through hole 412; through grooves 411 are symmetrically provided at both ends of the crossbeam 41; the upper section of the support connector 42 is an upper threaded section 421, and the upper end of the upper threaded section 421 passes through the through groove 411 to connect the clamping nut 43; the screw structure 5 moves toward the direction close to the tapered bearing 2 under the action of external force, and after its lower end is pressed against the top of the rotating shaft 11 of the high-pressure pump assembly, when the screw structure 5 continues to move downward, it will drive the crossbeam 41 to move upward, so that the crossbeam 41 drives the support connector 42 and the clamping body connected to the support connector 42 to move upward, thereby pulling the tapered bearing 2 out of the rotating shaft.

[0027] like Figure 4 , Figure 6 As shown, U-shaped through grooves 411 are symmetrically provided at both ends of the cross beam 41, and the upper section of the support connector 42 is an upper threaded section 421, and the upper end of the upper threaded section 421 passes through the through groove 411 to connect the compression nut 43. In actual use, the support connector 42 generally adopts a cylindrical structure. The overall length of the support connector 42 is greater than the distance from the top of the rotating shaft 11 of the high-pressure pump assembly to the annular portion 22 of the tapered bearing 2. The diameter of the upper threaded section 421 of the support connector 42 is smaller than the width of the through groove 411, The upper thread segment 421 can move left and right in the through slot 411 of the cross beam 41. The length of the upper thread segment 421 is greater than the height of the through slot 411. When the diameter of the middle segment 422 of the support connector is greater than the diameter of the upper thread segment 421, tighten the compression nut 43 to position the upper end of the support connector 42 on the cross beam 41.

[0028] When the diameter of the middle section 422 of the supporting connector is smaller than the diameter of the upper threaded section 421; after the semicircular annular protrusions of the first clamping body 31 and the second clamping body 32 have been embedded in the annular groove 221 of the annular portion 22, the screw structure 5 moves toward the direction close to the tapered bearing 2 under the action of external force, and the lower end of the screw structure 5 abuts against the top of the rotating shaft 11 of the high-pressure pump assembly. At this time, by tightening the clamping nut 43, the distance between the crossbeam 41 and the clamping body is fine-tuned. Then the screw structure 5 is operated to drive the clamping body to move upward, so that the tapered rotating shaft 11 is pulled off the rotating shaft 11. With this technical measure, the distance between the crossbeam 41 and the clamping body can be flexibly adjusted.

[0029] like Figure 4 , Figure 7As shown, the screw structure 5 includes an operating portion 51 at the upper end, a threaded portion 52 in the middle section, and a tightening portion 53 at the lower end. The operating portion 51 is in the shape of a polygonal column. The operating portion 51 can be in the shape of a hexagonal column. The threaded portion 52 in the middle section matches with the threaded through hole 412 of the crossbeam 41.

[0030] like Figure 4 As shown, the tightening portion 53 is conical. In actual use, the top of the rotating shaft 11 of the high-pressure pump assembly has a top groove 12; the tightening portion 53 adopts a conical structure, which can make the tightening portion 53 of the screw structure 5 and the top groove 12 cooperate with each other to prevent displacement. The use of this technical measure can improve the stability of the puller when in use.

[0031] like Figure 4 , Figure 5 As shown, the clamping body includes a first clamping body 31 and a second clamping body 32, and the first clamping body 31 and the second clamping body 32 are connected to each other through a clamping body connection structure. The clamping body connection structure can be bolted, snap-fitted, etc. By adopting this technical measure, the clamping body can stably clamp the annular portion 22, which can improve the stability of the puller when in use.

[0032] Specifically, the clamping body connection structure includes connection through holes 36 respectively arranged on both sides of the semicircular through holes 33 of the first clamping body 31 and the second clamping body 32, and the fastening bolts 6 are installed in the connection through holes 36; the first clamping body 31 and the second clamping body 32 are connected by the fastening bolts 6. When the semicircular annular protrusions of the first clamping body 31 and the second clamping body 32 have been embedded in the annular groove 221 of the annular portion 22, the first clamping body 31 and the second clamping body 32 are brought closer to each other by the fastening bolts 6, so that the first clamping body 31 and the second clamping body 32 can hold the annular groove 221 of the tapered bearing 2, thereby improving the stability of the puller when in use.

[0033] like Figure 4 , Figure 5 , Figure 7 As shown, the support connector 42 is detachably fixedly connected to the clamping body. Specifically, the lower section of the support connector 42 is a lower threaded section 423, and the upper end of the clamping body is provided with a threaded hole 35 that matches the lower threaded section 423; the support connector 42 is threadedly connected to the clamping body. Specifically, the upper ends of the first clamping body 31 and the second clamping body 32 are respectively provided with threaded holes 35, and the first clamping body 31 and the second clamping body 32 are respectively threadedly connected to the lower threaded sections 423 of the first support connector and the second support connector through the threaded holes 35. The adoption of this technical measure facilitates installation and disassembly, and can also allow the entire device to be split into multiple parts.

[0034] like Figure 4 , Figure 5As shown, a force-enhancing column 7 is provided on one side of the clamping body away from the semicircular through hole 33. Specifically, a force-enhancing column 7 is provided on one side of the first clamping body 31 and the second clamping body 32 away from the semicircular through hole 33. In actual use, there are problems such as the clamping body rotating when it is clamped on the annular portion 22 of the tapered bearing 2. By providing the force-enhancing column 7 and applying external force through a steel pipe or the like that cooperates with the force-enhancing column 7, the clamping body will not rotate.

[0035] A method for using a puller for a high-pressure pump assembly of an aircraft engine fuel pump comprises the following steps: Step 1: Loosen the fastening bolts 6 of the clamping body to separate the first clamping body 31 and the second clamping body 32. In actual use, the distance between the first clamping body 31 and the second clamping body 32 needs to be at least enough to allow the annular protrusion 34 to fit into the annular groove 221.

[0036] Loosen the clamping nut 43, adjust the distance between the cross beam 41 and the clamping body, so that the cross beam 41 is arranged on the upper side of the top end of the rotating shaft 11 of the high-pressure pump assembly, and the tightening portion 53 of the screw structure 5 is arranged on the upper side of the top end of the rotating shaft 11 of the high-pressure pump assembly. In actual use, after the annular protrusion 34 is aligned with the annular groove 221, the cross beam 41 and the tightening portion 53 of the screw structure 5 need to be arranged on the upper side of the top end of the rotating shaft 11 of the high-pressure pump assembly.

[0037] Step 2, after the semicircular annular protrusion 34 between the first clamping body 31 and the second clamping body 32 is embedded in the annular groove 221 of the annular portion 22 of the tapered bearing 2; tighten the fastening bolt 6 to make the first clamping body 31 and the second clamping body 32 tightly embrace the annular portion 22 of the tapered bearing 2; Step 3, controlling the screw structure 5 to move downward through the operating portion 51 of the screw structure 5, so that the pressing portion 53 of the screw structure 5 is pressed against the top of the rotating shaft 11 of the high-pressure pump assembly; Step 4: Control the screw structure 5 to continue to apply a downward force to the top of the rotating shaft 11 , driving the first clamping body 31 and the second clamping body 32 to move upward, and pulling the tapered bearing 2 out of the rotating shaft 11 .

[0038] This technical measure has the advantages of being easy to operate and not causing damage to the tapered bearing 2 .

[0039] In actual use, during step 3, the distance between the cross beam 41 and the clamping body can be fine-tuned by tightening the clamping nut 43 .

[0040] In actual use, when performing step 4, external force is applied through the steel pipe that cooperates with the reinforcement column 7, so that the clamping body will not rotate or have other problems.

[0041] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A puller for a high-pressure pump assembly of an aircraft engine fuel pump, characterized in that: Including clamping mechanism, bracket and top pressure structure, The clamping mechanism comprises two symmetrical clamping bodies, each of which has a semicircular through hole with a diameter larger than the diameter of the annular portion of the tapered bearing; the inner walls of the semicircular through holes are respectively provided with annular protrusions matching with the annular grooves of the annular portion; The support comprises a crossbeam and two supporting connectors; The upper end of the supporting connecting member can be slidably connected to the cross beam and can be positioned on the cross beam; the lower end of the supporting connecting member is fixedly connected to the upper end of the clamping body respectively; The top pressing structure is located between two supporting connectors, and the top pressing structure is detachably connected to the cross beam; The pressing structure faces the tapered bearing, and can move toward or away from the tapered bearing under the action of an external force.

2. The puller for the high-pressure pump assembly of an aircraft engine fuel pump according to claim 1, characterized in that: A threaded through hole is provided at the center of the crossbeam and passes through the upper and lower ends thereof, and the pressing structure is a screw structure matched with the threaded through hole; Through slots are symmetrically arranged at both ends of the crossbeam; the upper section of the support connector is an upper threaded section, and the upper end of the upper threaded section passes through the through slot and is connected to a clamping nut; The screw structure moves toward the tapered bearing under the action of external force, and its lower end is pressed against the top end of the rotating shaft of the high-pressure pump assembly.

3. The puller for the high-pressure pump assembly of an aircraft engine fuel pump according to claim 2, characterized in that: The length of the upper thread segment is greater than the height of the through groove, and the diameter of the middle section of the support connecting member close to the upper thread segment is less than or equal to the diameter of the upper thread segment.

4. The puller for the high-pressure pump assembly of an aircraft engine fuel pump according to claim 1, characterized in that: The supporting connecting piece and the clamping body are detachably fixedly connected.

5. The puller for the high-pressure pump assembly of an aircraft engine fuel pump according to claim 4, characterized in that: The lower section of the supporting connection piece is a lower threaded section, and the upper end of the clamping body is provided with a threaded hole matched with the lower threaded section; the supporting connection piece and the clamping body are threadedly connected.

6. The puller for the high-pressure pump assembly of an aircraft engine fuel pump according to claim 1, characterized in that: A force-adding column is arranged on one side of the clamping body away from the semicircular through hole.

7. The puller for the high-pressure pump assembly of an aircraft engine fuel pump according to claim 2, characterized in that: The screw structure comprises an operating portion at an upper end, a threaded portion at a middle section and a tightening portion at a lower end, wherein the tightening portion is conical.

8. The puller for the high-pressure pump assembly of an aircraft engine fuel pump according to claim 1, characterized in that: The clamping body comprises a first clamping body and a second clamping body, and the first clamping body and the second clamping body are connected to each other via a clamping body connecting structure.

9. The puller for the high-pressure pump assembly of an aircraft engine fuel pump according to claim 8, characterized in that: The clamping body connection structure comprises connection through holes respectively arranged on both sides of the semicircular through holes of the first clamping body and the second clamping body, and fastening bolts are installed in the connection through holes; the first clamping body and the second clamping body are connected by the fastening bolts.

10. A method for using a puller for a high-pressure pump assembly of an aircraft engine fuel pump according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1, loosen the fastening bolts of the clamping body to separate the first clamping body and the second clamping body; Loosen the clamping nut and adjust the distance between the crossbeam and the clamping body so that the crossbeam is disposed on the upper side of the top end of the rotating shaft of the high-pressure pump assembly, and the tightening portion of the screw structure is disposed on the upper side of the top end of the rotating shaft of the high-pressure pump assembly; Step 2, after the semicircular annular protrusion between the first clamping body and the second clamping body is embedded in the annular groove of the annular portion of the tapered bearing; tighten the fastening bolts so that the first clamping body and the second clamping body tightly embrace the annular portion of the tapered bearing; Step 3, controlling the screw structure to move downward through the operating part of the screw structure, so that the pressing part of the screw structure is pressed against the top end of the rotating shaft of the high-pressure pump assembly; Step 4: Control the screw structure to continue to apply downward force to the top of the rotating shaft, drive the first clamping body and the second clamping body to move upward, and pull the tapered bearing out of the rotating shaft.

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