CN116818221B - Microminiature electric gear fuel pump tightness detection system - Google Patents
Microminiature electric gear fuel pump tightness detection system Download PDFInfo
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- CN116818221B CN116818221B CN202311091884.1A CN202311091884A CN116818221B CN 116818221 B CN116818221 B CN 116818221B CN 202311091884 A CN202311091884 A CN 202311091884A CN 116818221 B CN116818221 B CN 116818221B
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- 239000000446 fuel Substances 0.000 title claims abstract description 48
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 169
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 230000003287 optical effect Effects 0.000 claims description 10
- 230000007306 turnover Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention discloses a microminiature electric gear fuel pump tightness detection system, belonging to the technical field of equipment detection; the device comprises a workbench and a placing plate, wherein a first sealing cover and a second sealing cover are arranged above the placing plate, the first sealing cover and the second sealing cover are connected with the placing plate through a moving mechanism, and barometers are arranged inside the first sealing cover and the second sealing cover; two symmetrically arranged sliding grooves I are formed in the sealing cover I, and two symmetrically arranged through holes I are formed in one end, away from the sealing cover II, of the sealing cover I; the inside of the second sealing cover is provided with two symmetrically arranged sliding grooves, one end, far away from the first sealing cover, of the second sealing cover is provided with a second through hole, and the central axis of the second through hole coincides with the central axis of the second sealing cover. According to the invention, the tightness detection of the fuel pump is automatically completed through the pitching adjusting mechanism, the moving mechanism and the heating cylinder, and the fuel pump is simple in structure and convenient to operate.
Description
Technical Field
The invention belongs to the technical field of equipment detection, and particularly relates to a tightness detection system of a miniature electric gear fuel pump.
Background
Along with the continuous development of technology and the progress of industry, the microminiature electric gear fuel pump is widely applied in the fields of automobiles, aviation, aerospace and the like. These miniature electric gear fuel pumps play a vital role in the engine and can be used to deliver fuel to the nozzle, ensuring proper operation of the engine. Therefore, the performance and the working efficiency of the miniature electric gear fuel pump are directly related to the working efficiency of the engine, especially the sealing performance, and can be directly related to the normal operation of the engine. Therefore, when the miniature electric gear fuel pump leaves the factory, it is necessary to detect the tightness of the miniature electric gear fuel pump.
The Chinese patent publication No. CN112696300B discloses a negative pressure-based electronic injection fuel pump detection system, which comprises a mounting plate, a support column, a support plate, a negative pressure pump, a vacuum tank and the like. The invention can detect the tightness of the electronic injection fuel pump in a static state, but can not detect the tightness of the fuel pump in various states and can not find the part with poor tightness specifically when detecting. In order to solve the problems, the invention provides a tightness detection system of a miniature electric gear fuel pump.
Disclosure of Invention
Aiming at the technical problems, the invention adopts the following technical scheme: a microminiature electric gear fuel pump tightness detection system comprises a workbench, wherein a placement plate is arranged above the workbench.
The workbench is connected with the placing plate through a pitching adjusting mechanism, a first sealing cover and a second sealing cover are arranged above the placing plate, the first sealing cover and the second sealing cover are connected with the placing plate through a moving mechanism, central axes of the first sealing cover and the second sealing cover coincide, and barometers are arranged inside the first sealing cover and the second sealing cover; the inside of the first sealing cover is provided with two symmetrically arranged sliding grooves I, and one end, far away from the second sealing cover, of the first sealing cover is provided with two symmetrically arranged through holes I.
The inside of the second sealing cover is provided with two symmetrically arranged sliding grooves, one end, far away from the first sealing cover, of the second sealing cover is provided with a second through hole, and the central axis of the second through hole coincides with the central axis of the second sealing cover.
Further, the moving mechanism comprises a driving assembly, the driving assembly comprises two symmetrically arranged moving ferrules, the two moving ferrules are respectively and fixedly connected with a first sealing cover and a second sealing cover in a coaxial center, the moving ferrules are in threaded fit with a lead screw, the moving ferrules are in sliding fit with an optical axis, a second reset spring is arranged between the two moving ferrules, the second reset spring is sleeved on an outer ring of the optical axis, two ends of the lead screw and the optical axis are rotationally connected with an axle bracket, and the axle bracket is fixedly arranged on a placing plate.
Further, the moving mechanism also comprises a turnover assembly, the turnover assembly comprises two symmetrically arranged driving gears, the driving gears are fixedly arranged on a gear shaft in a coaxial center, and the gear shaft is connected with the placing plate through a shaft bracket.
Further, the moving mechanism also comprises a motor, the motor is fixedly arranged on the placing plate, an output shaft of the motor penetrates through a shaft support where the lead screw is located and one end fixedly connected with a spline shaft, one end of the spline shaft, which is far away from the motor, is rotationally connected with the shaft support where the gear shaft is located, the spline shaft is located below the lead screw and the gear shaft, a first belt pulley is arranged on the lead screw and the gear shaft, one end of the first belt pulley is connected with one end of the belt, the other end of the belt is connected with a second belt pulley, an inner ring of the second belt pulley is provided with meshing teeth, the second belt pulley is rotationally arranged on the shaft support, a gear is slidably arranged on the spline shaft, the gear is rotationally connected with a connecting plate, the connecting plate is fixedly connected with the output shaft of the first cylinder, and the first cylinder is fixedly arranged on the placing plate.
Further, the first sealing ring is fixedly arranged on the outer ring coaxial center of the first sealing cover, the second sealing ring is fixedly arranged on the outer ring coaxial center of the second sealing cover, and when the fuel pump is detected, the first sealing ring is contacted with the second sealing ring.
Further, a guide bracket is fixedly arranged on each of the first sealing cover and the second sealing cover, the guide bracket is in sliding fit with the placing plate, a first connecting plate is fixedly connected to the guide bracket close to the first sealing cover, two symmetrically arranged round holes I are formed in the first connecting plate, and central axes of the first through holes and the first round holes coincide; the guide bracket close to the sealing cover II is fixedly connected with a connecting plate II, a round hole II is formed in the connecting plate II, the central axis of the through hole II coincides with the central axis of the round hole II, the connecting plate I and the connecting plate II are respectively and rotatably connected with a driven gear, and the driven gears are respectively and fixedly arranged on the sealing cover I and the sealing cover II.
Further, two gas hoods are fixedly installed on the first connecting plate, one gas hood is fixedly installed on the second connecting plate, the two gas hoods located on the first connecting plate are overlapped with the central axis of the first round hole, the gas hood located on the second connecting plate is overlapped with the central axis of the second round hole, the gas hoods on the first connecting plate and the second connecting plate are communicated with one end of a gas pipe, and the other end of the gas pipe is connected with a gas pump fixedly installed on the placing plate.
Further, the inner walls of the first sealing cover and the second sealing cover are both provided with heating cylinders in a sliding mode, one end of a straight rod is fixedly arranged on each heating cylinder, one end of a first reset spring is fixedly connected to the other end of the straight rod, the first reset spring in the first sealing cover is fixedly connected with the first sealing cover, and the straight rod in the first sealing cover is in sliding fit with the first sliding groove; the first return spring positioned in the second sealing cover is fixedly connected with the second sealing cover, the straight rod positioned in the second sealing cover is in sliding fit with the second sliding groove, and the heating cylinder is internally provided with a heating wire.
Further, the pitching adjusting mechanism comprises a first wedge block, a second wedge block, a third reset spring and a telescopic rod, wherein the first wedge block is slidably arranged on the workbench, the first wedge block is connected with the linear motion assembly, the second wedge block is fixedly arranged below the placing plate, and the inclined plane on the first wedge block is parallel to the inclined plane on the second wedge block; the three return springs have four, the one end of the third return spring with place board fixed connection, the other end of the third return spring and workstation fixed connection, the telescopic link have two, two return spring's one end is articulated with placing the board, the other end of the third return spring is articulated with the workstation.
Compared with the prior art, the invention has the beneficial effects that: (1) According to the invention, the tightness detection of the fuel pump is automatically completed through the pitching adjusting mechanism, the moving mechanism and the heating cylinder, so that the structure is simple, and the operation is convenient; (2) When the tightness of the fuel pump is detected, different positions can be detected, positions with poor tightness can be detected one by one, and the working efficiency can be improved; (3) The invention can simulate the states of the fuel pump at high temperature, rotation and inclination, and detect the tightness of various states, and has strong practicability.
Drawings
Fig. 1 is a front view of the overall structure of the present invention.
Fig. 2 is a left side view of the overall structure of the present invention.
Fig. 3 is a top view of the overall structure of the present invention.
Fig. 4 is a cross-sectional view taken along the direction A-A in fig. 3.
Fig. 5 is a schematic diagram of a portion of the structure of the present invention.
Fig. 6 is a sectional view taken along the direction B-B in fig. 5.
Fig. 7 is a schematic view of a partial enlarged structure at a in fig. 6.
Fig. 8 is a schematic diagram of a portion of the structure of the second embodiment of the present invention.
Fig. 9 is a cross-sectional view taken along the direction C-C in fig. 8.
Fig. 10 is a schematic view of a partially enlarged structure at B in fig. 9.
FIG. 11 is a schematic diagram of a portion of the third embodiment of the present invention.
Fig. 12 is a schematic view of a partially enlarged structure at C in fig. 11.
Fig. 13 is a schematic diagram of a portion of the structure of the present invention.
Fig. 14 is a schematic view of a partially enlarged structure at D in fig. 13.
Fig. 15 is a schematic view of the fuel pump structure.
Reference numerals: 1-a workbench; 2-placing a plate; 3-sealing cover I; 4-a first sliding groove; 5-through hole I; 6, sealing the cover II; 7-a second sliding groove; 8-a second through hole; 9-heating the cylinder; 10-a straight rod; 11-a first return spring; 12-moving the ferrule; 13-a first sealing ring; 14-a second sealing ring; 15-a driven gear; 16-connecting the first plate; 17-a first round hole; 18-connecting a plate II; 19-a second round hole; 20-an air hood; 21-a guide bracket; 22-screw rod; 23-optical axis; 24-a second reset spring; 25-shaft support; 26-an electric motor; 27-spline shaft; 28-a belt; 29-pulley one; 30-gear; 31-connecting plates; 32-cylinder I; 33-a second cylinder; 34-wedge one; 35-wedge II; 36-a return spring III; 37-telescoping rod; 38-a fuel pump; 3801-pump body; 3802-piston rod; 3803-oil inlet; 3804-oil outlet; 39-a gas pipe; 40-a drive gear; 41-gear shaft; 42-pulley two.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
Examples: the tightness detection system of the miniature electric gear fuel pump as shown in fig. 1-15 comprises a workbench 1, and a placement plate 2 is arranged above the workbench 1.
The workbench 1 is connected with the placing plate 2 through a pitching adjusting mechanism, a first sealing cover 3 and a second sealing cover 6 are arranged above the placing plate 2, the first sealing cover 3 and the second sealing cover 6 are connected with the placing plate 2 through a moving mechanism, central axes of the first sealing cover 3 and the second sealing cover 6 coincide, and barometers are arranged inside the first sealing cover 3 and the second sealing cover 6; two symmetrically arranged sliding grooves I4 are arranged in the sealing cover I3, and two symmetrically arranged through holes I5 are arranged at one end, far away from the sealing cover II 6, of the sealing cover I3.
Two symmetrically arranged sliding grooves II 7 are formed in the second sealing cover 6, a through hole II 8 is formed in one end, away from the first sealing cover 3, of the second sealing cover 6, and the central axis of the through hole II 8 coincides with the central axis of the second sealing cover 6.
The moving mechanism comprises a driving assembly, the driving assembly comprises two symmetrically arranged moving ferrules 12, the two moving ferrules 12 are respectively and fixedly connected with the first sealing cover 3 and the second sealing cover 6 in a coaxial center, the moving ferrules 12 are in threaded fit with a lead screw 22, the moving ferrules 12 are in sliding fit with an optical axis 23, a second reset spring 24 is arranged between the two moving ferrules 12, the second reset spring 24 is sleeved on the outer ring of the optical axis 23, both ends of the lead screw 22 and the optical axis 23 are respectively and rotatably connected with a shaft bracket 25, and the shaft bracket 25 is fixedly arranged on the placing plate 2.
The moving mechanism further comprises a turnover assembly, the turnover assembly comprises two symmetrically arranged driving gears 40, the driving gears 40 are fixedly arranged on a gear shaft 41 in the same axis, and the gear shaft 41 is connected with the placing plate 2 through a shaft bracket 25.
The moving mechanism further comprises a motor 26, the motor 26 is fixedly arranged on the placing plate 2, an output shaft of the motor 26 penetrates through a shaft support 25 where a lead screw 22 is located to be fixedly connected with one end of a spline shaft 27, one end, far away from the motor 26, of the spline shaft 27 is rotatably connected with the shaft support 25 where a gear shaft 41 is located, the spline shaft 27 is located below the lead screw 22 and the gear shaft 41, a belt pulley I29 is arranged on each of the lead screw 22 and the gear shaft 41, the belt pulley I29 is connected with one end of a belt 28, the other end of the belt 28 is connected with a belt pulley II 42, meshing teeth are arranged on the inner ring of the belt pulley II 42, the belt pulley II 42 is rotatably arranged on the shaft support 25, a gear 30 is slidably arranged on the spline shaft 27, the gear 30 is rotatably connected with a connecting plate 31, the connecting plate 31 is fixedly connected with the output shaft of a cylinder I32, and the cylinder I32 is fixedly arranged on the placing plate 2.
Specifically, when the extending end of the first cylinder 32 extends, the connecting plate 31 and the gear 30 are pushed to slide on the spline shaft 27, so that the gear 30 extends into the first pulley 29 rotatably mounted on the shaft bracket 25 where the gear shaft 41 is located, the spline shaft 27 thus rotated drives the gear 30 to rotate, and the gear 30 drives the belt 28 and the gear shaft 41 to rotate through the first pulley 29; when the extending end of the first cylinder 32 is contracted, the gear 30 slides into the first pulley 29 rotatably connected to the shaft bracket 25 on which the screw 22 is positioned, so that the belt 28 and the screw 22 are rotated by the gear 30 when the spline shaft 27 is rotated.
In addition, the shaft bracket 25 and the belt 28 connected to the screw 22 and the gear shaft 41 are identical in structure, material, and the like, and only the length is different because the screw 22 and the gear shaft 41 are different in height from the placement plate 2, but the shaft bracket 25 and the belt 28 are identical in function.
The outer ring coaxial center of the first sealing cover 3 is fixedly provided with a first sealing ring 13, the outer ring coaxial center of the second sealing cover 6 is fixedly provided with a second sealing ring 14, and when the fuel pump 38 is detected, the first sealing ring 13 is contacted with the second sealing ring 14.
The sealing cover I3 and the sealing cover II 6 are fixedly provided with guide brackets 21, the guide brackets 21 are in sliding fit with the placing plate 2, the guide brackets 21 close to the sealing cover I3 are fixedly connected with a connecting plate I16, the connecting plate I16 is provided with two symmetrically arranged round holes I17, and central axes of the through holes I5 and the round holes I17 coincide; a second connecting plate 18 is fixedly connected to a guide bracket 21 close to the second sealing cover 6, a second round hole 19 is formed in the second connecting plate 18, central axes of the second through hole 8 and the second round hole 19 coincide, the first connecting plate 16 and the second connecting plate 18 are respectively and rotatably connected with a driven gear 15, and the two driven gears 15 are respectively and fixedly arranged on the first sealing cover 3 and the second sealing cover 6.
Two gas hoods 20 are fixedly arranged on the first connecting plate 16, one gas hood 20 is fixedly arranged on the second connecting plate 18, the two gas hoods 20 on the first connecting plate 16 are overlapped with the central axis of the first round hole 17, the gas hood 20 on the second connecting plate 18 is overlapped with the central axis of the second round hole 19, the gas hoods 20 on the first connecting plate 16 and the gas hoods 20 on the second connecting plate 18 are communicated with one end of a gas pipe 39, and the other end of the gas pipe 39 is connected with a gas pump fixedly arranged on the placing plate 2.
Specifically, the air delivery pipe 39 is made of an elastic material, i.e., the air delivery pipe 39 is stretchable.
The inner walls of the first sealing cover 3 and the second sealing cover 6 are both provided with a heating cylinder 9 in a sliding manner, one end of a straight rod 10 is fixedly arranged on the heating cylinder 9, one end of a return spring 11 is fixedly connected to the other end of the straight rod 10, the return spring 11 positioned in the first sealing cover 3 is fixedly connected with the first sealing cover 3, and the straight rod 10 positioned in the first sealing cover 3 is in sliding fit with the first sliding groove 4; the first return spring 11 positioned in the second sealing cover 6 is fixedly connected with the second sealing cover 6, the straight rod 10 positioned in the second sealing cover 6 is in sliding fit with the second sliding groove 7, and a heating wire is arranged in the heating cylinder 9.
The pitching adjusting mechanism comprises a first wedge block 34, a second wedge block 35, a third reset spring 36 and a telescopic rod 37, wherein the first wedge block 34 is slidably arranged on the workbench 1, the first wedge block 34 is connected with the linear motion assembly, the second wedge block 35 is fixedly arranged below the placing plate 2, and the inclined plane I on the first wedge block 34 and the inclined plane II on the second wedge block 35 are parallel; the three return springs 36 are four, one end of the three return springs 36 is fixedly connected with the placing plate 2, the other end of the three return springs 36 is fixedly connected with the workbench 1, the two telescopic rods 37 are arranged, one end of the two return springs 36 is hinged with the placing plate 2, and the other end of the three return springs 36 is hinged with the workbench 1.
Specifically, four return springs three 36 are respectively located on four corners of the workbench 1, two telescopic rods 37 are located on one side of the workbench 1, the linear motion assembly is a cylinder two 33, the extending end of the cylinder two 33 is fixedly connected with a wedge block one 34, and the cylinder two 33 is fixedly installed on the workbench 1.
Working principle: when the tightness of the fuel pump 38 is detected, the pump body 3801 on the fuel pump 38 is clamped by a manipulator, and then the fuel pump 38 is moved between the first seal cover 3 and the second seal cover 6, so that the central axis of the pump body 3801 coincides with the central axes of the first seal cover 3 and the second seal cover 6.
The motor 26 is started, the output shaft of the motor 26 drives the spline shaft 27 to rotate, in an initial state, the gear 30 extends into the first belt pulley 29 below the screw 22, that is, the gear 30 forms meshing engagement with meshing teeth arranged on the inner ring of the first belt pulley 29 below the screw 22, and the spline shaft 27 and the gear 30 form sliding engagement through splines, so when the spline shaft 27 rotates, the gear 30 rotates, the first belt pulley 29 connected with the gear 30 rotates, so that the belt 28 and the screw 22 rotate, the threads of the two moving ferrules 12 in threaded engagement on the screw 22 are opposite, so that the two moving ferrules 12 move in the approaching direction, that is, the moving ferrules 12 slide in the approaching direction along the optical axis 23, in the process, the second return spring 24 is compressed, and the second return spring 24 plays a role of assisting in resetting the moving ferrules 12.
The movable ferrule 12 is fixedly connected with the first sealing cover 3 and the second sealing cover 6 respectively, so that in the process of mutually approaching the movable ferrule 12, the first sealing cover 3 and the second sealing cover 6 can mutually approach, the guide bracket 21 connected with the first sealing cover 3 and the second sealing cover 6 can slide along the rectangular groove on the placing plate 2, and the guide bracket 21 plays a role in guiding and supporting. In the process that the first sealing cover 3 and the second sealing cover 6 are close to each other, the two heating cylinders 9 are close to each other, and in the initial state, the two heating cylinders 9 extend out of the first sealing cover 3 and the second sealing cover 6 respectively, so that the two heating cylinders 9 are firstly contacted with the pump body 3801, the outer wall of the pump body 3801 and the inner wall of the heating cylinder 9 are mutually slid, after the two heating cylinders 9 are contacted with the manipulator, the two heating cylinders 9 complete supporting the pump body 3801, the manipulator is withdrawn at the moment, the first sealing cover 3 and the second sealing cover 6 are continuously close to each other, so that the two heating cylinders 9 are contacted, in the process that the first sealing cover 3 and the second sealing cover 6 are close to each other, the heating cylinders 9 on the first sealing cover 3 slide in the first sealing cover 3, the straight rod 10 slides along the sliding groove 4 in the first sealing cover 3, the straight rod 10 in the second sealing cover 6 is compressed, the straight rod 10 in the second sealing cover 6 slides in the inner part of the second sealing cover 3801, the sliding groove 7 arranged on the second sealing cover 6 is withdrawn, the first heating cylinder 11 in the second sealing cover 9 is also slid along the sliding groove 7 arranged on the first sealing cover 6, the first heating cylinder 11 and the second heating cylinder 9 is completely extended out of the sealing cover 3808, the first heating cylinder 9 is completely extended out of the sealing cover 3 and the first heating cylinder 3 is completely extended out of the sealing cover 3, and the second heating cylinder is completely extended out of the sealing cover 38 is completely extended out of the sealing cover 3, and the first heating cylinder is completely extended out of the sealing cylinder 3 is completely extended out of the sealing cover 3, and the sealing cylinder is completely extended out of the sealing cylinder is completely, and is completely extended out from the sealing cylinder 3, and is completely extended out from the sealing cylinder is completely, and is completely extended. During the movement of the first seal cover 3 and the second seal cover 6, the gas cover 20 on the first seal cover 3 and the gas cover 20 on the second seal cover 6 both pull the gas pipe 39 to move, but the gas pipe 39 is telescopic, so that interference and breakage are not generated, and when the fuel pump 38 is fixed, the first seal cover 3 is contacted with the heating cylinder 9, at the moment, the first seal ring 13 on the first seal cover 3 is contacted with the second seal ring 14 on the second seal cover 6, and the first seal ring 13 is intersected with the second seal ring 14, so that the tightness of the contact position of the first seal cover 3 and the second seal cover 6 can be improved, and a sealed space is formed inside the first seal cover 3 and the second seal cover 6.
After the fuel pump 38 is fixed, the air tightness of the fuel pump 38 is detected in a natural state, the air pump is started, air is conveyed into the air conveying pipe 39 through the air pump, the air enters the air hood 20 through the air conveying pipe 39, and enters the piston rod 3802, the oil inlet 3803 and the oil outlet 3804 from the air hood 20 into the pump body 3801 respectively, then the barometer observes the pressure in a sealed space formed by the first sealing hood 3 and the second sealing hood 6, if the pressure does not change, the air tightness of the fuel pump 38 is good, if the pressure changes, the air tightness of the fuel pump 38 is bad, and at the moment, the air can be conveyed to the piston rod 3802, the oil inlet 3803 and the oil outlet 3804 independently for detection, so that the place with bad air tightness can be detected through a control variable method.
After the natural state air tightness detection is completed on the fuel pump 38, the air tightness detection is performed on the fuel pump 38 in a rotating state, the first cylinder 32 is started, the extending end of the first cylinder 32 drives the connecting plate 31 to slide along the placing plate 2, the gear 30 rotationally connected to the connecting plate 31 slides along the spline shaft 27, the gear 30 gradually approaches the driving gear 40, and the gear 30 is finally inserted into the first pulley 29 below the gear shaft 41, so that the gear 30 forms meshing fit with meshing teeth in the guide support 21 below the gear shaft 41, and in the moving process of the first seal cover 3 and the second seal cover 6, the driven gears 15 fixedly connected to the first seal cover 3 and the second seal cover 6 move to the positions of the driving gears 40, and the two driven gears 15 respectively form meshing fit with the two driving gears 40. At this time, the motor 26 is started, the output shaft of the motor 26 drives the spline shaft 27 to rotate, the spline shaft 27 drives the belt 28 connected with the gear shaft 41 to rotate through the gear 30, the gear shaft 41 rotates on the shaft bracket 25, the driving gear 40 fixedly connected with the gear shaft 41 rotates, the driving gear 40 is meshed with the driven gear 15, so that the driven gear 15 drives the sealing cover I3 and the sealing cover II 6 to rotate, and the connecting plate I16, the connecting plate II 18 are rotationally connected with the driven gear 15, and the connecting plate I16 and the connecting plate II 18 are fixedly connected with the guide bracket 21, so that the sealing cover I3 and the sealing cover II 6 can drive the fuel pump 38 to rotate at this time, and then the air pump is used for carrying out air tightness detection on the fuel pump 38 again.
After the air tightness detection in the rotating state is completed, the air tightness detection in the inclined state is performed on the fuel pump 38, namely, the condition that an ascending slope occurs in the running process of an automobile is simulated, at the moment, the fuel pump is in the inclined state, specifically, the second cylinder 33 is started, the extending end of the second cylinder 33 drives the first wedge block 34 to slide on the workbench 1, the inclined surface on the first wedge block 34 is parallel to the inclined surface on the second wedge block 35, so that the first wedge block 34 is close to the second wedge block 35 and contacts with the second wedge block 35, the sliding first wedge block 34 pushes the second wedge block 35, and one end of the placing plate 2 provided with the second wedge block 35 is lifted upwards, then the end of the placing plate 2 far away from the second wedge 35 is lowered, so that the fuel pump 38 on the placing plate 2 is inclined, the third return spring 36 on one side of the placing plate 2 is stretched, the third return spring 36 on the other side of the placing plate 2 is compressed, the third return spring 36 is used for assisting the resetting of the placing plate 2, the telescopic rod 37 is positioned at the end of the placing plate 2 far away from the second wedge 35, so that the telescopic rod 37 is shortened, the telescopic rod 37 is hinged with the workbench 1 and the placing plate 2, interference is not generated, after the fuel pump 38 is inclined, the fuel pump 38 starts to deliver air, the air tightness detection is carried out, and the detection flow and the detection mode are the same as those in a natural state and are not repeated here.
After the tightness detection in the natural state, the rotation state and the inclination state, the heating wire in the heating cylinder 9 can be started to enable the fuel pump 38 to be in a high-temperature environment, and then the fuel pump 38 is detected according to the detection flow and method in the natural state. This is done to simulate the airtight condition of the fuel pump 38 when in use, which generates heat when exposed to a high temperature environment. It should be noted that, in this embodiment, the air tightness detection in the heating state is performed separately, and in the actual detection process, the detection operation can be performed simultaneously with the detection operation in other states, which can be implemented by those skilled in the art, and the detection result of the barometer is transmitted to the computer terminal, which also belongs to the prior art, and is not described herein again.
Claims (2)
1. The utility model provides a microminiature electric gear fuel pump leakproofness detecting system, includes workstation (1), is located the top of workstation (1) and has arranged board (2), its characterized in that:
the workbench (1) is connected with the placing plate (2) through a pitching adjusting mechanism, a first sealing cover (3) and a second sealing cover (6) are arranged above the placing plate (2), the first sealing cover (3) and the second sealing cover (6) are connected with the placing plate (2) through a moving mechanism, central axes of the first sealing cover (3) and the second sealing cover (6) coincide, and barometers are arranged inside the first sealing cover (3) and the second sealing cover (6); two symmetrically arranged sliding grooves I (4) are formed in the sealing cover I (3), and two symmetrically arranged through holes I (5) are formed in one end, away from the sealing cover II (6), of the sealing cover I (3);
two symmetrically arranged sliding grooves (7) are formed in the second sealing cover (6), a through hole (8) is formed in one end, far away from the first sealing cover (3), of the second sealing cover (6), and the central axis of the through hole (8) coincides with the central axis of the second sealing cover (6);
the movable mechanism comprises a driving assembly, the driving assembly comprises two symmetrically arranged movable ferrules (12), the two movable ferrules (12) are fixedly connected with a first sealing cover (3) and a second sealing cover (6) in a coaxial center respectively, the movable ferrules (12) are in threaded fit with a lead screw (22), the movable ferrules (12) are in sliding fit with an optical axis (23), a second return spring (24) is arranged between the two movable ferrules (12), the second return spring (24) is sleeved on the outer ring of the optical axis (23), the lead screw (22) and two ends of the optical axis (23) are both in rotary connection with a shaft bracket (25), and the shaft bracket (25) is fixedly arranged on a placing plate (2);
the moving mechanism further comprises a turnover assembly, the turnover assembly comprises two symmetrically arranged driving gears (40), the driving gears (40) are fixedly arranged on a gear shaft (41) in a coaxial mode, and the gear shaft (41) is connected with the placing plate (2) through a shaft bracket (25);
the moving mechanism further comprises a motor (26), the motor (26) is fixedly arranged on the placing plate (2), an output shaft of the motor (26) penetrates through a shaft support (25) where the lead screw (22) is located and is fixedly connected with one end of a spline shaft (27), one end, far away from the motor (26), of the spline shaft (27) is rotatably connected with the shaft support (25) where a gear shaft (41) is located, the spline shaft (27) is located below the lead screw (22) and the gear shaft (41), a belt pulley I (29) is arranged on the lead screw (22) and the gear shaft (41), the belt pulley I (29) is connected with one end of a belt (28), the other end of the belt (28) is connected with a belt pulley II (42), an inner ring of the belt pulley II (42) is provided with meshing teeth, the belt pulley II (42) is rotatably arranged on the shaft support (25), a gear (30) is slidably arranged on the spline shaft (27), the gear (30) is rotatably connected with a connecting plate (31), the output shaft (31) is fixedly connected with a cylinder I (32), and the cylinder I is fixedly arranged on the placing plate (2);
the pitching adjusting mechanism comprises a first wedge block (34), a second wedge block (35), a third reset spring (36) and a telescopic rod (37), wherein the first wedge block (34) is slidably arranged on the workbench (1), the first wedge block (34) is connected with the linear motion assembly, the second wedge block (35) is fixedly arranged below the placing plate (2), and the inclined plane I on the first wedge block (34) and the inclined plane II on the second wedge block (35) are parallel to each other; the three return springs (36) are four, one end of the three return springs (36) is fixedly connected with the placing plate (2), the other end of the three return springs (36) is fixedly connected with the workbench (1), the two telescopic rods (37) are arranged, one end of the two return springs (36) is hinged with the placing plate (2), and the other end of the three return springs (36) is hinged with the workbench (1);
the outer ring coaxial center of the first sealing cover (3) is fixedly provided with a first sealing ring (13), the outer ring coaxial center of the second sealing cover (6) is fixedly provided with a second sealing ring (14), and when the fuel pump (38) is detected, the first sealing ring (13) is contacted with the second sealing ring (14);
the sealing cover I (3) and the sealing cover II (6) are fixedly provided with guide brackets (21), the guide brackets (21) are in sliding fit with the placing plate (2), the guide brackets (21) close to the sealing cover I (3) are fixedly connected with a connecting plate I (16), the connecting plate I (16) is provided with two symmetrically arranged round holes I (17), and central axes of the through holes I (5) and the round holes I (17) coincide; a second connecting plate (18) is fixedly connected to a guide bracket (21) close to the second sealing cover (6), a second round hole (19) is formed in the second connecting plate (18), central axes of the second through hole (8) and the second round hole (19) coincide, the first connecting plate (16) and the second connecting plate (18) are respectively and rotatably connected with a driven gear (15), and the two driven gears (15) are respectively and fixedly arranged on the first sealing cover (3) and the second sealing cover (6);
two gas hoods (20) are fixedly mounted on the first connecting plate (16), one gas hood (20) is fixedly mounted on the second connecting plate (18), the two gas hoods (20) located on the first connecting plate (16) are overlapped with the central axis of the first round hole (17), the gas hoods (20) located on the second connecting plate (18) are overlapped with the central axis of the second round hole (19), the gas hoods (20) on the first connecting plate (16) and the gas hoods (20) on the second connecting plate (18) are communicated with one end of a gas pipe (39), and the other end of the gas pipe (39) is connected with a gas pump fixedly mounted on the placing plate (2).
2. The miniature electric gear fuel pump tightness detection system according to claim 1, wherein: the inner walls of the first sealing cover (3) and the second sealing cover (6) are respectively provided with a heating cylinder (9) in a sliding manner, one end of a straight rod (10) is fixedly arranged on the heating cylinder (9), one end of a return spring I (11) is fixedly connected to the other end of the straight rod (10), the return spring I (11) positioned in the first sealing cover (3) is fixedly connected with the first sealing cover (3), and the straight rod (10) positioned in the first sealing cover (3) is in sliding fit with the first sliding groove (4); the first return spring (11) positioned in the second sealing cover (6) is fixedly connected with the second sealing cover (6), the straight rod (10) positioned in the second sealing cover (6) is in sliding fit with the second sliding groove (7), and a heating wire is arranged in the heating cylinder (9).
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