CN113442091B - Pump core assembly disassembling device of main fuel pump of engine - Google Patents
Pump core assembly disassembling device of main fuel pump of engine Download PDFInfo
- Publication number
- CN113442091B CN113442091B CN202110790542.3A CN202110790542A CN113442091B CN 113442091 B CN113442091 B CN 113442091B CN 202110790542 A CN202110790542 A CN 202110790542A CN 113442091 B CN113442091 B CN 113442091B
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- Prior art keywords
- assembly
- main fuel
- fuel pump
- tensioning
- pulling
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/56—Reuse, recycling or recovery technologies of vehicles
Abstract
The invention discloses a pump core assembly disassembly device of a main fuel pump of an engine, which comprises a compression assembly, a tensioning and pulling assembly, a centering assembly and a guide seat; the self-aligning assembly is characterized in that the aligning assembly and the pressing assembly are arranged on the tensioning and pulling assembly, the guide seat is sleeved outside the pressing assembly, the tensioning and pulling assembly and the aligning assembly, the guide seat is connected with the main fuel pump shell, the tensioning and pulling assembly stretches into the main fuel pump shell, and the pressing assembly is propped against the main fuel pump shell.
Description
[ field of technology ]
The invention relates to the technical field of engines, in particular to a pump core assembly disassembling device of a main fuel pump of an engine.
[ background Art ]
The main fuel pump core assembly has a complex structure, and as shown in fig. 1 to 3, the pump core assembly is divided into a driving gear assembly 100, a driven gear assembly 101, a driving sleeve assembly 102 and a driven sleeve assembly 103, wherein the driving gear assembly 100 and the driven gear assembly 101 comprise parts such as a gasket 104, a bearing outer ring 105, a fixed gasket 106, a gear 107 and the like, and the driving sleeve assembly 102 and the driven sleeve assembly 103 comprise parts such as a movable gasket 108, a rolling rod 109, a sleeve 110 and the like.
The pump core assembly is clearance fit with the internal bore of the pump main fuel pump housing 200 with a maximum clearance of 0.065mm and a minimum clearance of 0.018mm, wherein the thickness of the stationary and movable gaskets 106, 108 is only 7.5mm, and the thickness of the stationary and movable gaskets 106, 108 is thin due to the large fit clearance of the pump core assembly, resulting in easy destabilization of the stationary and movable gaskets 106, 108 upon disassembly.
The existing pump core assembly disassembling device adopts an elastic expansion sleeve drawing type combined structure, the assembly is disassembled in two steps, the driving gear assembly 100 and the driven gear assembly 101 are disassembled first, the driving sleeve assembly 102 and the driven sleeve assembly 103 are disassembled, the driving gear assembly 100 and the driven gear assembly 101 are expanded by using the elastic expansion sleeve, the inner holes of the driving sleeve assembly 102 and the driven sleeve assembly 103 are expanded, and the pump core assembly is separated from the main fuel pump shell by spiral drawing.
Because the device only has the function of the tensioning assembly, the unstability of the fixed gasket 106 and the movable gasket 108 in the main fuel pump shell 200 can not be controlled, so that the fixed gasket 106 and the movable gasket 108 are both deflected, the pump core assembly is blocked in the main fuel pump shell 200, the assembly separating the parts of the main fuel pump shell 200 can not be ensured to still move along the axis (the assembly plays a guiding role before the main fuel pump shell is not separated), and the assembly separating the parts of the main fuel pump shell is deflected outside the main fuel pump shell, so that the non-decomposed pump core assembly is blocked.
When the pump core assembly is blocked, the end face of the pump core assembly needs to be knocked by a copper rod to adjust and reset, and the operation is performed repeatedly until the pump core assembly is successfully decomposed. The existing pump core assembly disassembly device cannot smoothly realize disassembly, time and labor are wasted in the disassembly process, and if the pump core assembly is forcibly disassembled after being blocked, the inner hole of the main fuel pump shell 200 is scratched, so that the quality of products is directly affected.
In view of the foregoing, it would be desirable to provide a new type of engine main fuel pump core assembly disassembly apparatus that overcomes the above-described drawbacks.
[ invention ]
The invention aims to provide a pump core assembly disassembly device of a main fuel pump of an engine, which can automatically adjust the concentricity of a pump core assembly when a compression assembly and a tension pulling assembly are combined into a whole, does not change the axial stress direction of the pump core assembly in the disassembly process, does not deviate the upward moving axis of the pump core assembly, and can ensure that a gear assembly separating a shell part of the main fuel pump still moves upwards along the axis of a base body, thereby solving the problems of the clamping and the incapability of smooth disassembly of the gear assembly.
In order to achieve the above purpose, the invention provides a pump core assembly disassembly device of a main fuel pump of an engine, which comprises a compression component, a tensioning and pulling component, a aligning component and a guide seat; the self-aligning assembly and the compression assembly are both arranged on the tension pulling assembly, the guide seat is sleeved outside the compression assembly, the tension pulling assembly and the self-aligning assembly, the guide seat is connected with the main fuel pump shell, the tension pulling assembly stretches into the main fuel pump shell, and the compression assembly is propped against the main fuel pump shell.
Preferably, the tensioning and pulling assembly comprises an operating rod, a pull rod, a support plate, a tensioning shaft and a tensioning sleeve; the operation rod is arranged in the horizontal direction, the pull rod is vertically connected with the operation rod, the support plate is sleeved on the pull rod, the expansion shaft is inserted on the support plate, the expansion sleeve is sleeved on one side of the expansion shaft, and the aligning assembly is sleeved on the expansion shaft and located on the other side of the support plate.
Preferably, the tensioning and pulling assembly further comprises a fastener, wherein the fastener is sleeved on the tensioning shaft and clamps the aligning assembly between the support plate and the fastener.
Preferably, the compression assembly is sleeved on the expansion sleeve of the expansion pull assembly and is abutted against the main fuel pump shell, and the expansion shaft and the expansion sleeve extend into the main fuel pump shell.
Preferably, a conical frustum is formed at one end of the expansion shaft, a conical hole is formed at the head of the expansion sleeve, a slot is formed in the outer wall of the expansion sleeve, the slot extends from the head of the expansion sleeve to a direction close to the support plate, and the conical hole of the expansion sleeve is in contact with the conical frustum of the expansion shaft.
Preferably, the aligning assembly comprises a first spherical washer and a second spherical washer sleeved on the expansion shaft, and the cambered surface of the first spherical washer is contacted with the cambered surface of the second spherical washer.
Preferably, the tension pulling assembly further comprises a second support plate, the pull rod penetrates through the second support plate to be connected with the operation rod, and the second support plate is pressed on the cushion block.
Preferably, the guide seat is arranged outside the compression assembly, the tension pulling assembly and the aligning assembly and is connected with the main fuel pump shell.
Preferably, the guide seat comprises a seat body and a cushion block; the cushion block is provided with a pin, and the cushion block is inserted into the guide seat through the pin.
Preferably, fourteen first jacks and two first positioning pin holes are formed in the lower end face of the base body of the guide seat, fourteen second jacks in one-to-one correspondence with the fourteen first jacks and two second positioning pin holes in one-to-one correspondence with the two first positioning pin holes are formed in the upper end face of the main fuel pump shell, and the base body of the guide seat and the main fuel pump shell are installed in the first jacks, the first positioning pin holes, the second jacks and the second positioning pin holes through bolts.
Compared with the prior art, the pump core assembly disassembling device of the main fuel pump of the engine has the following beneficial effects: the concentricity of the pump core assembly can be automatically adjusted when the compression assembly is integrated, the axial stress direction of the pump core assembly is not changed in the decomposition process, the upward moving axis of the pump core assembly is not deflected, and meanwhile, the gear assembly for separating the shell part of the main fuel pump can still move upwards along the axis of the base body, so that the problems that the gear assembly is blocked and cannot be successfully decomposed are solved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a prior art primary fuel pump core assembly;
FIG. 2 is a cross-sectional view of a drive gear assembly, a driven gear assembly of the primary fuel pump core assembly shown in FIG. 1;
FIG. 3 is a block diagram of the driving sleeve assembly and the driven sleeve assembly shown in FIG. 1;
FIG. 4 is a schematic diagram of a pump core assembly disassembly device for a main fuel pump of an engine according to the present invention;
FIG. 5 is a perspective view of a tension pull assembly of the pump core assembly disassembly device of the main fuel pump of the engine of FIG. 4;
FIG. 6 is a cross-sectional view of a self-aligning assembly of the pump core assembly disassembly device of the main fuel pump of the engine shown in FIG. 4;
FIG. 7 is a perspective view of a rod guide of the pump core assembly disassembly device of the main fuel pump of the engine of FIG. 4;
fig. 8 is a perspective view of an exploded assembly of the pump core assembly of the main fuel pump of the engine of fig. 4.
[ detailed description ] of the invention
In order to make the objects, technical solutions and advantageous technical effects of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and detailed description. It should be understood that the detailed description is intended to illustrate the invention, and not to limit the invention.
It is to be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. It will be apparent to those skilled in the art that the terms described above have the particular meaning in the present invention, as the case may be.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", or the like, may include one or more such features, either explicitly or implicitly. Furthermore, the meaning of "a plurality of", "a number" means two or more, unless specifically defined otherwise.
Referring to fig. 4, the invention provides a pump core assembly disassembling device of a main fuel pump of an engine, which comprises a compressing component 1, a tensioning and pulling component 2, a aligning component 3 and a guide seat 4; the aligning assembly 3 and the pressing assembly 1 are arranged on the tensioning and pulling assembly 2, the guide seat 4 is sleeved outside the pressing assembly 1, the tensioning and pulling assembly 2 and the aligning assembly 3, the guide seat 4 is fixedly connected with the main fuel pump shell 5, the tensioning and pulling assembly 2 stretches into the main fuel pump shell 5, and the pressing assembly 1 is propped against the main fuel pump shell 5.
Referring to fig. 5 to 8, further, the tension pulling assembly 2 includes an operation rod 21, a pull rod 22, a support plate 23, a tension shaft 24, and a tension sleeve 25; the operation rod 21 is arranged in the horizontal direction, the pull rod 22 is vertically connected with the operation rod 21, the support plate 23 is sleeved on the pull rod 22, the expansion shaft 24 is inserted on the support plate 23 and is parallel to the pull rod 22, the expansion sleeve 25 is sleeved on the expansion shaft 24 and is positioned on one side of the support plate 23, and the aligning assembly 3 is sleeved on the expansion shaft 24 and is positioned on the other side of the support plate 23.
Furthermore, the compressing component 1 is provided with a hollow cylindrical through hole 11, so that when the compressing component and the tensioning and pulling component 2 are combined into a whole, the through hole 11 of the compressing component can automatically adjust the concentricity of the pump core assembly, the axial stress direction of the pump core assembly is not changed in the process of decomposition, the upward moving axis of the pump core assembly is not deflected,
further, the tension pulling assembly 2 further includes a fastener 26 (such as a hexagonal nut), and the fastener 26 is sleeved on the tension shaft 24 and clamps the aligning assembly 3 between the support plate 23 and the fastener 26.
Further, the compression assembly 1 is sleeved on the expansion sleeve of the tension pulling assembly 2 and abuts against the main fuel pump shell 5, and the expansion shaft 24 and the expansion sleeve 25 extend into the main fuel pump shell 5.
Specifically, a truncated cone 241 is formed at one end of the expansion shaft 24, the expansion sleeve 25 is made of spring steel (65 Mn) material, and the expansion sleeve 25 has high strength and good toughness after heat treatment; the thickness of the expansion sleeve 25 is 1 mm-1.5 mm, a conical hole 251 is formed at the head of the expansion sleeve 25, three grooves 252 which are uniformly distributed are formed on the outer wall of the expansion sleeve 25, the grooves 252 extend from the head of the expansion sleeve 25 to the direction close to the support plate 23, and the conical hole 251 of the expansion sleeve 25 is in contact with the conical frustum 241 of the expansion shaft 24.
When the fastener 26 (hexagonal nut) is screwed down, the expansion shaft 24 is driven to move upwards, the expansion sleeve 25 is expanded, and then the operation rod 21 is rotated to drive the compression assembly 1, the tension pulling assembly 2, the aligning assembly 3 and the guide seat 4 to move upwards through the pull rod 22.
Further, the aligning assembly 3 includes a first spherical washer 31 and a second spherical washer 32 sleeved on the expansion shaft 24, where the arc surface of the first spherical washer 31 contacts with the arc surface of the second spherical washer 32.
Further, the guide seat 4 includes a seat body 41 and a cushion block 42; the cushion block 42 is provided with a pin, and the cushion block 42 is inserted into the guide seat 4 through the pin.
Further, the tension pulling assembly 2 further includes a second support plate 27, the pull rod 22 passes through the second support plate 27 to be connected with the operation rod 21, and the second support plate 27 is pressed on the cushion block 42.
Specifically, the guide seat 4 is installed outside the compression assembly 1, the tension pulling assembly 2 and the aligning assembly 3 and is fixedly connected with the main fuel pump shell 5. In this way, the lower end surface of the seat body 41 of the guide seat 4 contacts with the upper end surface of the main fuel pump housing 5.
Further, fourteen first insertion holes 411 and two first positioning pin holes 412 are formed in the lower end face of the base 41 of the guide seat 4, fourteen second insertion holes corresponding to the fourteen first insertion holes 411 one to one and two second positioning pin holes corresponding to the two first positioning pin holes 412 one to one are formed in the upper end face of the main fuel pump housing 5, and the base 41 of the guide seat 4 and the main fuel pump housing 5 are installed in the first insertion holes 411, the first positioning pin holes 412, the second insertion holes and the second positioning pin holes in a penetrating mode through cylindrical bolts.
When the oil pump is used, the guide seat 4 is arranged on the main fuel pump shell 5, the fastener 26 is screwed down, the expansion sleeve 25 expands the inner hole, and the compression mechanism 1 is in a compression state. When the fastener 26 is screwed down, the tensioning and pulling mechanism 2 needs to be slightly rocked, so that the function of automatically adjusting concentricity is realized;
rotating the operating rod 21, and moving the pull rod 22 upwards under the action of the operating rod 21, and simultaneously moving the gear assembly 51 in the main fuel pump shell 5 upwards, separating part of the gear assembly 51 of the main fuel pump shell 5 from the part of the gear assembly 51 of the main fuel pump shell 5 into the seat body 41 of the guide seat 4, and still moving part of the gear assembly 51 upwards along the axis of the seat body under the guide action of the seat body 41;
when the fastener 26 is loosened, the tension sleeve 25 loses tension, the tension pulling mechanism 2 is removed, and the gear assembly 51 in the main fuel pump housing 5 of the main fuel pump is disassembled.
The present invention is not limited to the details and embodiments described herein, and thus additional advantages and modifications may readily be made by those skilled in the art, without departing from the spirit and scope of the general concepts defined in the claims and the equivalents thereof, and the invention is not limited to the specific details, representative apparatus and examples shown and described herein.
Claims (8)
1. The pump core assembly disassembling device of the main fuel pump of the engine is characterized by comprising a compression assembly (1), a tensioning and pulling assembly (2), a centering assembly (3) and a guide seat (4); the self-aligning device comprises a main fuel pump shell (5), a tensioning and pulling assembly (2), a guide seat (4), a tensioning and pulling assembly (2) and a self-aligning assembly (3), wherein the self-aligning assembly (3) and the tensioning and pulling assembly (1) are arranged on the tensioning and pulling assembly (2), the guide seat (4) is sleeved outside the tensioning and pulling assembly (1), the tensioning and pulling assembly (2) and the self-aligning assembly (3), the guide seat (4) is connected with the main fuel pump shell (5) and the tensioning and pulling assembly (2) stretches into the main fuel pump shell (5), and the tensioning and pulling assembly (1) is propped against the main fuel pump shell (5);
the tensioning and pulling assembly (2) comprises an operation rod (21), a pull rod (22), a support plate (23), a tensioning shaft (24) and a tensioning sleeve (25); the operation rod (21) is arranged in the horizontal direction, the pull rod (22) is vertically connected with the operation rod (21), the support plate (23) is sleeved on the pull rod (22), the expansion shaft (24) is inserted on the support plate (23), the expansion sleeve (25) is sleeved on one side of the expansion shaft (24), and the aligning assembly (3) is sleeved on the expansion shaft (24) and is positioned on the other side of the support plate (23);
the aligning assembly (3) comprises a first spherical washer (31) and a second spherical washer (32) which are sleeved on the expanding shaft (24), and the cambered surface of the first spherical washer (31) is contacted with the cambered surface of the second spherical washer (32).
2. The pump core assembly disassembly device of a main fuel pump of an engine according to claim 1, wherein the tensioning and pulling assembly (2) further comprises a fastener (26), the fastener (26) is sleeved on the tensioning shaft (24) and clamps the aligning assembly (3) between the support plate (23) and the fastener (26).
3. The pump core assembly disassembly device of the main fuel pump of the engine according to claim 1, wherein the compression component (1) is sleeved on a tension sleeve (25) of the tension pulling component (2) and is abutted against the main fuel pump shell (5), and the tension shaft (24) and the tension sleeve (25) extend into the main fuel pump shell (5).
4. The pump core assembly disassembly device of the main fuel pump of the engine according to claim 1, wherein a cone table (241) is formed at one end of the expansion shaft (24), a conical hole (251) is formed at the head of the expansion sleeve (25), a slot (252) is formed on the outer wall of the expansion sleeve (25), the slot (252) extends from the head of the expansion sleeve (25) to a direction approaching the support plate (23), and the conical hole (251) of the expansion sleeve (25) is contacted with the cone table (241) of the expansion shaft (24).
5. The pump core assembly disassembly device of a main fuel pump of an engine according to claim 1, wherein the tension pull assembly (2) further comprises a second support plate (27), the pull rod (22) is connected with the operating rod (21) through the second support plate (27), and the second support plate (27) is pressed on the cushion block (42).
6. The pump core assembly disassembly device of the main fuel pump of the engine according to claim 1, wherein the guide seat (4) is arranged outside the compression component (1), the tensioning and pulling component (2) and the aligning component (3) and is connected with the main fuel pump shell (5).
7. The pump core assembly disassembly device of a main fuel pump of an engine according to claim 1, wherein the guide holder (4) comprises a holder body (41) and a cushion block (42); the cushion block (42) is provided with a pin, and the cushion block (42) is inserted into the guide seat (4) through the pin.
8. The pump core assembly disassembly device of the main fuel pump of the engine according to claim 7, wherein fourteen first jacks (411) and two first positioning pin holes (412) are formed in the lower end face of the base body (41) of the guide seat (4), fourteen second jacks which are in one-to-one correspondence with the fourteen first jacks (411) and two second positioning pin holes which are in one-to-one correspondence with the two first positioning pin holes (412) are formed in the upper end face of the main fuel pump shell (5), and the base body (41) of the guide seat (4) and the main fuel pump shell (5) are inserted into the first jacks (411), the first positioning pin holes (412), the second jacks and the second positioning pin holes through bolts to be installed together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110790542.3A CN113442091B (en) | 2021-07-13 | 2021-07-13 | Pump core assembly disassembling device of main fuel pump of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110790542.3A CN113442091B (en) | 2021-07-13 | 2021-07-13 | Pump core assembly disassembling device of main fuel pump of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113442091A CN113442091A (en) | 2021-09-28 |
| CN113442091B true CN113442091B (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110790542.3A Active CN113442091B (en) | 2021-07-13 | 2021-07-13 | Pump core assembly disassembling device of main fuel pump of engine |
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| CN (1) | CN113442091B (en) |
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| CN104493782A (en) * | 2014-12-16 | 2015-04-08 | 武汉航达航空科技发展有限公司 | Expansion-sleeve-type bearing drawing device |
| CN108214394A (en) * | 2017-12-28 | 2018-06-29 | 中国航发四川燃气涡轮研究院 | A kind of device of fast decoupled bearing |
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- 2021-07-13 CN CN202110790542.3A patent/CN113442091B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202592313U (en) * | 2012-04-27 | 2012-12-12 | 玉柴联合动力股份有限公司 | Internal-tension self-locking bearing drawing tool |
| DE102013209991A1 (en) * | 2012-06-14 | 2013-12-19 | Schaeffler Technologies AG & Co. KG | Device for mounting and/or dismounting dual clutch in clutch housing of transmission housing gear shaft of dual clutch transmission for use with vehicle, has contact point whose axial movement is provided at end facing support sleeve |
| CN202656139U (en) * | 2012-06-20 | 2013-01-09 | 中国石油集团西部钻探工程有限公司 | Tool for dismantling piston rod of blowout preventer |
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| CN113442091A (en) | 2021-09-28 |
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