Detection equipment for aero-engine oil nozzle production

Abstract

The invention discloses detection equipment for production of an aero-engine oil nozzle, the detection equipment comprises a sealing detection mechanism, an oil cleaning mechanism and an oil nozzle body, the sealing detection mechanism comprises a bottom plate, and a square support frame is fixedly mounted at the top of the bottom plate, and the invention relates to the technical field of oil nozzle detection. According to the detection equipment for production of the aero-engine oil nozzle, the sealing detection mechanism and the oil cleaning mechanism are combined for use, and the two mechanisms are arranged, so that sealing detection can be performed twice before and after oil injection detection of the oil nozzle body, the sealing performance of the oil nozzle body is ensured, and the sealing performance of the oil nozzle body is ensured while a square frame is pulled. And the arc clamping plate can be driven to clamp and correct the bottom end of the oil nozzle body through cooperation between the structures, and after oil injection detection is completed, the carving cylinder can be pressed and limited through the lower arc plate, so that the carving cylinder can be more stable when an air bag ring conducts oil scraping cleaning on the carving cylinder subsequently.

Description

Technical Field

[0001] This invention relates to the field of fuel injector testing technology, specifically to a testing device for the production of aero-engine fuel injectors. Background Technology

[0002] Fuel injectors for aircraft engines are key components in the design of combustion chambers in aerospace engineering. Their main function is to atomize or vaporize fuel, accelerate the formation of the air-fuel mixture to ensure stable combustion and improve combustion efficiency. The main types include centrifugal injectors, pneumatic injectors, evaporative injectors, and oil slinger nozzles. In order to ensure the quality of fuel injectors during use, they usually need to be tested during production. However, the testing process requires manual installation and connection of the fuel injectors by workers, which is cumbersome. Patent documents have now improved this process.

[0003] For example, Chinese patent CN222166532U discloses a testing device for lubricating oil nozzles used in aircraft engines. The device includes a testing oil tank and a mounting frame fixedly connected to the top of the testing oil tank. Multiple oil distribution pipes are connected to the mounting frame via a lifting oil distribution unit, which drives the oil distribution pipes to move up and down. A placement plate is fixedly connected to the mounting frame. Multiple placement holes are provided through the top of the placement plate, and these holes are aligned vertically with the oil distribution pipes. By using an electric actuator to move the oil distributor, oil distribution pipes, and rack plate up and down, multiple fuel injectors can be quickly installed, fixed, or unfixed during the testing process. This allows for rapid installation and removal of the fuel injectors, making operation more convenient for staff and enabling quick testing of the fuel injectors, thereby improving testing efficiency.

[0004] The equipment mentioned above, while enabling rapid installation and removal of fuel injectors and improving testing efficiency, still has significant shortcomings in practical use, such as: After the fuel injector is placed in the device, the oil pipe is connected to the fuel injector by the pressure of the electric actuator alone. This method not only cannot achieve precise alignment, but also results in poor sealing due to the lack of a sealing component. Furthermore, the fuel injector has high internal pressure when injecting fuel, making it easy for the fuel to leak out. Like traditional testing equipment on the market, this device uses a measuring cup to measure the amount of fuel injected. However, the fuel must be drained after each test. Since the fuel is adhesive, it will stick to the inner wall of the measuring cup. Waiting for the fuel on the inner wall to completely drain out takes a long time, but not cleaning it will lead to inaccurate fuel measurement in subsequent tests. Disassembly and cleaning are too cumbersome.

[0005] Therefore, a testing device for the production of aero-engine fuel injectors has been designed to improve testing efficiency and accuracy in order to address this type of defect. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a testing device for the production of aero-engine fuel injectors, which solves the problems of low efficiency and instability of existing fuel injector testing equipment.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a testing device for the production of aero-engine fuel injectors, comprising a sealing testing mechanism, an oil cleaning mechanism, and a fuel injector body. The sealing testing mechanism includes a base plate, a square support frame fixedly mounted on the top of the base plate, and side boxes mounted on both sides of the square support frame through openings. A U-shaped seat is provided in the inner cavity of the side box, and a rotating rod is rotatably connected to the inner wall of the U-shaped seat via a bearing. The end of the rotating rod away from the U-shaped seat passes through the U-shaped seat and extends to the inner side of the square support frame. A flipping frame is fixedly connected between the opposite ends of the two rotating rods. A graduated cylinder is provided on the inner side of the flipping frame, and several graduated cylinders are provided. A gear is fixedly connected to the surface of the rotating rod and located on the inner side of the U-shaped seat. A magnetic plate is fixedly mounted on the side of the inner cavity of the side box away from the U-shaped seat, and a rectangular opening is provided at the rear of the side box.

[0008] Preferably, an electric telescopic rod is fixedly installed on the rear side of the top of the square support frame via a bracket. The bottom end of the electric telescopic rod is fixedly connected to a first mountain-shaped frame that cooperates with the fuel injector body. An arc-shaped cover is fixedly installed on the surface of the first mountain-shaped frame, and several arc-shaped covers are provided. A buffer rod is fixedly connected to the bottom end of the first mountain-shaped frame. A second mountain-shaped frame is fixedly connected to the bottom end of the buffer rod. A first spring is sleeved on the surface of the buffer rod.

[0009] Preferably, a sealing ring cover is fixedly connected to the surface of the second mountain-shaped frame, and the number of sealing ring covers is the same as that of the arc pressure cover. The fuel injector body is located inside the sealing ring cover. A rubber ring seat is fixedly installed at the bottom of the sealing ring cover. A first crossbar and a second crossbar are provided at the front and rear of the two side boxes, and the first crossbar and the second crossbar are slidably connected to a number of sealing ring covers. The bottom of the first crossbar and the second crossbar are fixedly connected to an arc clamp plate that cooperates with the fuel injector body through a bracket, and a number of arc clamp plates are provided in groups of two. The arc clamp plate is located at the bottom of the sealing ring cover.

[0010] Preferably, both ends of the first and second crossbars pass through the side box and extend into the interior of the side box. The right end of the first crossbar and the left end of the second crossbar are fixedly connected to arc-shaped abutments that cooperate with the U-shaped seat. An insertion interface is provided on the opposite side of the two arc-shaped abutments. A magnetic block that cooperates with the magnetic plate is fixedly connected to the opposite side of the two arc-shaped abutments through an opening. A lifting rod is fixedly connected to the bottom of the arc-shaped abutments through a fixing block. A toothed plate frame that meshes with the gear is slidably installed on the surface of the lifting rod. A second spring is sleeved on the surface of the lifting rod and above the toothed plate frame.

[0011] Preferably, the front of both sides of the top of the base plate is fixedly connected to an inclined top plate, and the rear of both sides of the top of the base plate is slidably installed with a pull-back spring rod via a sliding plate. The front end of the pull-back spring rod is fixedly connected to a U-shaped plate that cooperates with the inclined top plate, and a third spring is sleeved on the surface of the pull-back spring rod.

[0012] Preferably, the oil cleaning mechanism includes a square frame, which is located at the front of the square support frame. L-shaped rods are fixedly connected to both sides of the square frame, and the rear ends of the L-shaped rods pass through the side box and the U-shaped seat in sequence and extend to the rear of the side box. A trapezoidal block that cooperates with the rectangular opening and the arc-shaped abutment is fixedly connected to one end of the L-shaped rod extending to the rear of the side box. A lower arc plate is fixedly installed on the surface of the square frame by a bracket, and several lower arc plates are provided.

[0013] Preferably, a base plate is fixedly connected to the rear of the square frame, and several base plates are provided. The front and rear parts of the bottom of the inner cavity of the base plate are provided with sliding grooves. A toggle rod is slidably installed on the inner side of the sliding groove. An elastic piece that cooperates with the base plate is fixedly connected between the top ends of two toggle rods, and an oil-absorbing paper is provided on the top of the elastic piece. A positioning base rod is fixedly connected to the bottom of the base plate. U-shaped clamping plates that cooperate with the toggle rods are slidably installed on both sides of the surface of the positioning base rod. A fourth spring is sleeved on both sides of the surface of the positioning base rod.

[0014] Preferably, an arched frame is fixedly connected to the rear of the square support frame, and a triangular plate that cooperates with the U-shaped card plate is fixedly installed on the surface of the arched frame, and a plurality of triangular plates are provided.

[0015] Preferably, a guide rod is fixedly connected to the surface of the side box, a pull-out plate is slidably installed between the surfaces of the two guide rods, a round hole frame is fixedly connected to the rear of the pull-out plate through a bracket, and an air cylinder is slidably installed on the inner side of the round hole frame. An air compressor rod is fixedly connected to the rear of the pull-out plate, and the rear end of the air compressor rod extends to the inner side of the air cylinder. A fifth spring is sleeved on the surface of the air compressor rod.

[0016] Preferably, the surface of the air injection cylinder is provided with a first air hole, the rear part of the surface of the air injection cylinder is fixedly connected with an air bag ring, the surface of the air injection cylinder and the inner side of the air bag ring are provided with a second air hole, and both sides of the bottom of the circular hole frame are fixedly connected with vertical rods, and the surface of the vertical rods is slidably mounted with an arc-shaped bottom block that cooperates with the U-shaped plate and the inclined top plate.

[0017] This invention provides a testing device for the production of fuel injectors for aircraft engines. Compared with existing technologies, it has the following advantages: (1) The testing equipment for the production of aero-engine fuel injectors combines a sealing testing mechanism and an oil cleaning mechanism. The combination of these two mechanisms allows for two sealing tests on the fuel injector body before and after the fuel injection test, thus ensuring the sealing performance of the fuel injector body. While pulling the square frame, the mechanism can also use the inter-structure cooperation to drive the arc clamp plate to clamp and correct the bottom end of the fuel injector body. After the fuel injection test is completed, the lower arc plate can press and limit the measuring cylinder, making the subsequent oil scraping and cleaning of the measuring cylinder by the airbag ring more stable. This effectively facilitates the use of the equipment by the staff and improves the testing quality.

[0018] (2) The testing equipment for the production of aero-engine fuel injectors has a sealing ring cover on the inner side of the square support frame, and a toothed plate frame and an arc-shaped abutment block inside the side box. It is used in conjunction with an electric telescopic rod and an arc pressure cover. The structure can use the thrust of the electric telescopic rod to make the toothed plate frame rotate the measuring cylinder, which is convenient for docking with the sealing ring cover and subsequent oil discharge. It can also use the rubber ring seat and the arc pressure cover to improve the stability of the fuel injector body and the sealing during fuel injection, so that the fuel injector body can be stable during fuel injection and there will be no oil leakage. When the square frame is pulled, it can also drive the trapezoidal block to squeeze the arc-shaped abutment block, thereby pushing the first crossbar and the second crossbar to make the arc clamp plate hold the fuel injector body for fixation and correction. It can also push the arc-shaped abutment block to the top of the U-shaped seat, which is convenient for the subsequent descent of the sealing ring cover.

[0019] (3) The testing equipment for the production of fuel injectors for aircraft engines is equipped with a base plate and a lower arc plate at the rear and surface of the square frame, respectively, and is used in conjunction with a triangular plate. The setup of these structures allows for pre-injection sealing testing and post-injection sealing testing of the fuel injector body after the base plate is pulled back and forth. During testing, the U-shaped clamp can limit the lever to prevent the elastic plate from shifting. However, when the base plate reaches the rear, the triangular plate squeezes the U-shaped clamp to release the lever from the limit, thus facilitating the replacement of the oil-absorbing paper. At the same time, the lower arc plate will press the graduated cylinder to limit the movement when it moves backward.

[0020] (4) The testing equipment for the production of fuel injectors for aircraft engines is equipped with a compressor rod and an air injection cylinder at the front of the square support frame, and is used in conjunction with an air bag ring, an arc-shaped bottom block and a U-shaped plate. The configuration of these structures allows the air bag ring to be inflated and fit against the inner wall of the measuring cylinder by pressing the U-shaped plate against the air injection cylinder after the oil is poured out laterally from the measuring cylinder. This allows the oil to be scraped out quickly and effectively when the device moves forward. After the pull plate is pulled to the front, the arc-shaped bottom block is separated from the U-shaped plate by the pressure of the inclined top plate, which makes it convenient for the staff to use. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a rear view of the structure of the sealing detection mechanism and the oil cleaning mechanism of the present invention; Figure 3 This is a cross-sectional view of the square support frame structure of the present invention; Figure 4 For the present invention Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is a schematic diagram of the electric telescopic pole, the first mountain-shaped frame, and the arc-shaped cover structure of the present invention; Figure 6 This is a schematic diagram of the lifting rod, toothed plate frame, and second spring structure of the present invention; Figure 7 This is a schematic diagram of the sealing ring cover, rubber ring seat and first crossbar structure of the present invention; Figure 8 This is a top view of the internal structure of the sealing ring cover of the present invention; Figure 9 This is a cross-sectional view of the side box structure of the present invention; Figure 10 This is a side view of the internal structure of the side box of the present invention; Figure 11 This is a schematic diagram of the flipping frame, measuring cylinder, and gear structure of the present invention; Figure 12 This is a schematic diagram of the inclined top plate, pull-back spring rod, and U-shaped plate structure of the present invention; Figure 13 This is a schematic diagram of the oil cleaning mechanism structure of the present invention; Figure 14 This is a cross-sectional view of the base plate structure of the present invention; Figure 15 This is a schematic diagram of the positioning base rod, U-shaped clamping plate, and fourth spring structure of the present invention; Figure 16 This is a schematic diagram of the bow-shaped frame and triangular plate structure of the present invention; Figure 17 This is a cross-sectional view of the air injection cylinder structure of the present invention; Figure 18 For the present invention Figure 18 A magnified view of a section at point B.

[0022] In the diagram: 1. Sealing detection mechanism; 2. Oil cleaning mechanism; 3. Injector body; 101. Base plate; 102. Square support frame; 103. Side box; 104. U-shaped seat; 105. Rotating rod; 106. Tilting frame; 107. Measuring cylinder; 108. Gear; 109. Magnetic plate; 110. Electric telescopic rod; 111. First mountain-shaped frame; 112. Arc pressure cover; 113. Buffer rod; 114. Second mountain-shaped frame; 115. First spring; 116. Sealing ring cover; 117. Rubber ring seat; 118. First crossbar; 119. Second crossbar; 120. Arc clamp plate; 121. Arc surface abutment; 122. Insertion interface; 123. Magnetic block; 124. Lifting rod; 125. Toothed plate frame; 126. Second spring; 127. Sloping top plate; 128. Retractable spring rod; 129. U-shaped plate; 130. Third spring; 131. Rectangular opening; 201. Square frame; 202. L-shaped rod; 203. Trapezoidal block; 204. Lower arc plate; 205. Base plate; 206. Sliding groove; 207. Actuating rod; 208. Elastic sheet; 209. Oil-absorbing paper; 210. Positioning bottom rod; 211. U-shaped clamping plate; 212. Fourth spring; 213. Bow-shaped frame; 214. Triangular plate; 215. Guide rod; 216. Pull-out plate; 217. Round hole frame; 218. Air cylinder; 219. Air compressor rod; 220. Fifth spring; 221. First air hole; 222. Airbag ring; 223. Second air hole; 224. Vertical rod; 225. Arc-shaped bottom block. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1-18 The present invention provides a technical solution: a testing device for the production of aero-engine fuel injectors, comprising a sealing testing mechanism 1, an oil cleaning mechanism 2, and a fuel injector body 3; Please refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12 The diagram illustrates the overall structure of the sealing testing mechanism 1. The sealing testing mechanism 1 includes a base plate 101, with a square support frame 102 fixedly mounted on the top of the base plate 101. Side boxes 103 are installed on both sides of the square support frame 102 through openings. A U-shaped seat 104 is provided inside the side box 103. A rotating rod 105 is rotatably connected to the inner wall of the U-shaped seat 104 via bearings. The end of the rotating rod 105 away from the U-shaped seat 104 passes through the U-shaped seat 104 and extends... Inside the square support frame 102, a flipping frame 106 is fixedly connected between the opposite ends of the two rotating rods 105. A measuring cylinder 107 is provided inside the flipping frame 106, and several measuring cylinders 107 are provided. A gear 108 is fixedly connected to the surface of the rotating rod 105 and inside the U-shaped seat 104. A magnetic plate 109 is fixedly installed on the side of the side box 103 away from the U-shaped seat 104. A rectangular opening 131 is opened at the rear of the side box 103. An electric telescopic rod 110 is fixedly installed on the rear side of the top of the square support frame 102 via a bracket. The bottom end of the electric telescopic rod 110 is fixedly connected to a first mountain-shaped frame 111 that cooperates with the fuel injector body 3. An arc pressure cover 112 is fixedly installed on the surface of the first mountain-shaped frame 111, and several arc pressure covers 112 are provided. A buffer rod 113 is fixedly connected to the bottom end of the first mountain-shaped frame 111, and a second mountain-shaped frame 114 is fixedly connected to the bottom end of the buffer rod 113. A first spring 115 is sleeved on the surface of the buffer rod 113, and a sealing ring cover 116 is fixedly connected to the surface of the second mountain-shaped frame 114. The sealing ring cover 116 is connected to the arc pressure cover 114. The number of covers 112 is the same. The injector body 3 is located inside the sealing ring cover 116. A rubber ring seat 117 is fixedly installed at the bottom of the sealing ring cover 116. A first crossbar 118 and a second crossbar 119 are provided at the front and rear of the two side boxes 103. The first crossbar 118 and the second crossbar 119 are slidably connected to several sealing ring covers 116. The bottom of the first crossbar 118 and the second crossbar 119 are fixedly connected to an arc clamp plate 120 that cooperates with the injector body 3 through a bracket. Several arc clamp plates 120 are provided in groups of two. The arc clamp plates 120 are located at the bottom of the sealing ring cover 116. Both ends of the first crossbar 118 and the second crossbar 119 pass through the side box 103 and extend into the interior of the side box 103. The right end of the first crossbar 118 and the left end of the second crossbar 119 are fixedly connected to the arc-shaped abutment 121 that cooperates with the U-shaped seat 104. The two arc-shaped abutments 121 are provided with insertion interfaces 122 on opposite sides. The two arc-shaped abutments 121 are fixedly connected to the magnetic blocks 123 that cooperate with the magnetic plates 109 through openings on opposite sides. The bottom of the arc-shaped abutment 121 is fixedly connected to the lifting rod 124 through a fixing block. The surface of the lifting rod 124 is slidably mounted with a toothed plate frame 125 that meshes with the gear 108. The surface of the lifting rod 124 and the upper part of the toothed plate frame 125 are fitted with a second spring 126. The front of both sides of the top of the base plate 101 is fixedly connected to the inclined top plate 127. The rear of both sides of the top of the base plate 101 is slidably installed with a pull-back spring rod 128 via a sliding plate. The front end of the pull-back spring rod 128 is fixedly connected to a U-shaped plate 129 that cooperates with the inclined top plate 127. A third spring 130 is sleeved on the surface of the pull-back spring rod 128.

[0025] In use, first place the injector body 3 to be tested inside several sealing ring covers 116 in sequence. Then connect the oil supply pipe to the oil inlet at the top of several injector bodies 3. Then, pull the square frame 201 by hand. During the limiting process of the L-shaped rod 202, the trapezoidal block 203 and the base plate 205 move synchronously. When the base plate 205 moves forward, the triangular plate 214 no longer squeezes the two U-shaped clamps 211, so that the U-shaped clamps 211 limit and fix the lever 207 through the elastic force of the fourth spring 212. Then, when the base plate 205 moves forward, the oil-absorbing paper 209 will contact the bottom of the injector body 3 to test the injector body 3 when it is not spraying. Regarding the sealing of the nozzle body 3, if oil stains appear on the oil-absorbing paper 209, the sealing of the nozzle body 3 is compromised. The process continues until several base plates 205 are simultaneously pulled to the front of the square support frame 102. At this point, two trapezoidal blocks 203 pass through the rectangular opening 131 and press against two curved abutment blocks 121. The curved abutment blocks 121 on both sides then push the first horizontal bar 118 and the second horizontal bar 119 to move laterally relative to each other, causing one end of the first horizontal bar 118 and the second horizontal bar 119 to be inserted into the inner side of the insertion interface 122. Furthermore, the movement of the first horizontal bar 118 and the second horizontal bar 119 will cause the two curved clamping plates 120 in the same group to close and clamp the nozzle body 3. While holding the nozzle, the clamping plate 120 also corrects the nozzle body 3 so that the bottom end of the nozzle body 3 is vertically downward. After the arc surface block 121 is pressed, it is located directly above the inside of the U-shaped seat 104. At this time, the electric telescopic rod 110 is activated to push the first mountain-shaped frame 111 and the arc pressure cover 112 down. The second mountain-shaped frame 114 also descends under the elastic thrust of the first spring 115. First, the toothed plate frame 125 will use the meshing of the gear 108 to drive the rotating rod 105, the flipping frame 106 and several measuring cylinders 107 to rotate 90 degrees, so that the measuring cylinders 107 are in a vertical state. At this time, the toothed plate frame 125 abuts against the bottom of the inner cavity of the U-shaped seat 104 and no longer descends. The first mountain-shaped frame 111 will continue to descend, while the second mountain-shaped frame 114 will also descend as the lifting rod 124 descends, until the second mountain-shaped frame 114 pushes the sealing ring cover 116 to engage with the measuring cylinder 107. The rubber ring seat 117 then provides a sealing function. If the second mountain-shaped frame 114 cannot descend further, the first mountain-shaped frame 111 will continue to descend via the buffer rod 113, causing the arc pressure cover 112 to press against the top of the injector body 3 to fix it in place. At this point, the oil pump is activated to allow the injector body 3 to spray oil inside the measuring cylinder 107. The quality of the injector body 3 is then judged by observing the amount of oil in the measuring cylinder 107 and the spraying status from the outside.

[0026] Please refer to Figure 13 , Figure 14 , Figure 15 , Figure 16 , Figure 17 and Figure 18The diagram illustrates the overall structure of the oil cleaning mechanism 2. The oil cleaning mechanism 2 includes a square frame 201, located at the front of a square support frame 102. L-shaped rods 202 are fixedly connected to both sides of the square frame 201. The rear ends of the L-shaped rods 202 sequentially pass through the side box 103 and the U-shaped seat 104, extending to the rear of the side box 103. A trapezoidal block 203, which mates with the rectangular opening 131 and the arc-shaped abutment 121, is fixedly connected to the end of the L-shaped rod extending to the rear of the side box 103. A lower arc plate 204 is fixedly mounted on the surface of the square frame 201 via a bracket, and several lower arc plates 204 are provided. A base is fixedly connected to the rear of the square frame 201. The base plate 205 is provided with several plates. The bottom of the inner cavity of the base plate 205 is provided with sliding grooves 206 at the front and rear. A lever 207 is slidably installed on the inner side of the sliding groove 206. An elastic sheet 208 that cooperates with the base plate 205 is fixedly connected between the top ends of the two levers 207. The elastic sheet 208 is a thin steel sheet with elasticity. An oil-absorbing paper 209 is provided on the top of the elastic sheet 208. A positioning base rod 210 is fixedly connected to the bottom of the base plate 205. U-shaped clamping plates 211 that cooperate with the levers 207 are slidably installed on both sides of the surface of the positioning base rod 210. A fourth spring 212 is sleeved on both sides of the surface of the positioning base rod 210. A bow-shaped frame 213 is fixedly connected to the rear of the square support frame 102. A triangular plate 214 that cooperates with the U-shaped card plate 211 is fixedly installed on the surface of the bow-shaped frame 213. Several triangular plates 214 are provided. A guide rod 215 is fixedly connected to the surface of the side box 103. A pull-out plate 216 is slidably installed between the surfaces of the two guide rods 215. A round hole frame 217 is fixedly connected to the rear of the pull-out plate 216 through a bracket. An air cylinder 218 is slidably installed on the inner side of the round hole frame 217. A pressure rod 219 is fixedly connected to the rear of the pull-out plate 216. The surface of the pressure rod 219 is covered with a rubber layer to increase the sealing. The rear end of the pressure rod 219 extends to the inner side of the air cylinder 218. A fifth spring 220 is sleeved on the surface of the pressure rod 219. The surface of the air cylinder 218 has a first air hole 221. An air bag ring 222 is fixedly connected to the rear of the surface of the air cylinder 218. The surface of the air bag ring 222 is covered with dense coral wool for oil absorption. The air bag ring 222 is made of oil-resistant rubber. Its expanded diameter is 0.5 mm larger than the inner diameter of the measuring cylinder 107 to ensure that it fits the inner wall. The density of the coral wool is 200 strands per square centimeter. It is sewn onto the surface of the air bag ring to ensure oil absorption efficiency. A second air hole 223 is provided on the surface of the air cylinder 218 and on the inner side of the air bag ring 222. Vertical rods 224 are fixedly connected to both sides of the bottom of the round hole frame 217, and an arc-shaped bottom block 225 that cooperates with the U-shaped plate 129 and the inclined top plate 127 is slidably installed on the surface of the vertical rods 224.

[0027] After the test is completed, the electric telescopic rod 110 is activated to first pull the first mountain-shaped frame 111 and the arc pressure cover 112 upward without pressing the injector body 3. Then, the bottom end of the buffer rod 113 will pull the sealing ring cover 116 and the arc surface block 121 upward. At this time, the sealing ring cover 116 separates from the graduated cylinder 107 until the arc surface block 121 and the sealing ring cover 116 both rise to the top. As the toothed plate frame 125 rises, the rotating rod 105 and the flipping frame 106 drive the graduated cylinder 107 to rotate in the opposite direction, rotating the graduated cylinder 107 to a horizontal position to allow the oil to flow out. Then, the square frame 201 is pushed backward by hand. When it moves backward, the trapezoidal block 203 will first exit from the rectangular opening 131 and no longer press the arc surface block 121. At this time, the arc surface block 121 is ready to use. The magnetic plate 109 reverses the repulsive force on the magnetic block 123, causing it to move and reset. Simultaneously, the arc clamp 120 no longer holds the nozzle body 3. Then, the rearward movement of the base plate 205 causes the oil-absorbing paper 209 to contact the bottom of the nozzle body 3 again. The sealing performance of the nozzle body 3 after injection is then checked. This continues until the base plate 205 is fully pushed to the rear of the square support frame 102. At this point, the triangular plate 214 will press the two U-shaped clamps 211 apart. The U-shaped clamps 211 no longer limit the movement of the lever 207. Then, by hand, the two levers 207 are pinched to compress the elastic sheet 208 and replace the oil-absorbing paper 209. Finally, the pull plate 216 is pushed backward, causing several graduated cylinders 107 to be pressed by the lower arc plate 204, thus maintaining stability. At this time, the elastic pull plate 216 of the fifth spring 220 will push the air cylinder 218 backward through the round hole frame 217 until the air bag ring 222 enters the inside of the measuring cylinder 107. Then, when the rear end of the air cylinder 218 abuts against the rear of the inner cavity of the measuring cylinder 107, as the pull plate 216 continues to push, the air compressor 219 moves inside the air cylinder 218, thereby injecting air into the inside of the air cylinder 218 through the first air hole 221. Then, the gas enters the air bag ring 222 through the second air hole 223, supporting the entire air bag ring 222. The air compressor 219 blocks the first air hole 221 to prevent the gas inside the air bag ring 222 from leaking out. At this time, the air bag ring 222 is tightly fitted to the inner wall of the measuring cylinder 107, and at the same time, the arc-shaped bottom block 225 and the U-shaped The rear of plate 129 is engaged, and the spring force of the third spring 130 synchronously locks the air compressor 219 and the air injection cylinder 218. Then, pulling the pull plate 216 backward causes the air injection cylinder 218 to move forward along with the air bladder ring 222. The air bladder ring 222 then scrapes off the residual oil on the inner wall of the measuring cylinder 107 until it moves out of the measuring cylinder 107. At this point, the inclined top plate 127 inserts into the middle of the U-shaped plate 129 and squeezes the arc-shaped bottom block 225, thereby sliding the arc-shaped bottom block 225 upward and separating it from the U-shaped plate 129. The U-shaped plate 129 then returns to its original position by moving backward via the third spring 130. The air compressor 219 then moves forward, exposing the first air hole 221. The gas inside the air bladder ring 222 is then discharged and its volume is reduced.Then replace the fuel injector body 3 for the next batch of testing.

[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A testing device for the production of fuel injectors for aircraft engines, comprising a sealing testing mechanism (1), an oil cleaning mechanism (2), and a fuel injector body (3), characterized in that: The sealing detection mechanism (1) includes a base plate (101), a square support frame (102) is fixedly installed on the top of the base plate (101), and side boxes (103) are installed on both sides of the square support frame (102) through openings. A U-shaped seat (104) is provided in the inner cavity of the side box (103). A rotating rod (105) is rotatably connected to the inner wall of the U-shaped seat (104) through a bearing. The end of the rotating rod (105) away from the U-shaped seat (104) passes through the U-shaped seat (104) and extends to the square support frame (102). Inside the side box (103), a flipping frame (106) is fixedly connected between the opposite ends of the two rotating rods (105). A measuring cylinder (107) is provided inside the flipping frame (106), and several measuring cylinders (107) are provided. A gear (108) is fixedly connected to the surface of the rotating rod (105) and inside the U-shaped seat (104). A magnetic plate (109) is fixedly installed on the side of the side box (103) away from the U-shaped seat (104). A rectangular opening (131) is opened at the rear of the side box (103).

2. The testing equipment for the production of aero-engine fuel injectors according to claim 1, characterized in that: An electric telescopic rod (110) is fixedly installed on the rear side of the top of the square support frame (102) by a bracket. The bottom end of the electric telescopic rod (110) is fixedly connected to a first mountain-shaped frame (111) that works in conjunction with the fuel injector body (3). An arc pressure cover (112) is fixedly installed on the surface of the first mountain-shaped frame (111), and several arc pressure covers (112) are provided. A buffer rod (113) is fixedly connected to the bottom end of the first mountain-shaped frame (111). A second mountain-shaped frame (114) is fixedly connected to the bottom end of the buffer rod (113). A first spring (115) is sleeved on the surface of the buffer rod (113).

3. The testing equipment for the production of aero-engine fuel injectors according to claim 2, characterized in that: The surface of the second mountain-shaped frame (114) is fixedly connected with a sealing ring cover (116), and the number of sealing ring covers (116) is the same as that of the arc pressure cover (112). The fuel injector body (3) is located inside the sealing ring cover (116). A rubber ring seat (117) is fixedly installed at the bottom of the sealing ring cover (116). A first crossbar (118) and a second crossbar (119) are provided at the front and rear of the two side boxes (103). The first crossbar (118) and the second crossbar (119) are slidably connected to several sealing ring covers (116). The bottom of the first crossbar (118) and the second crossbar (119) are fixedly connected to an arc clamp plate (120) that cooperates with the fuel injector body (3) through a bracket. Several arc clamp plates (120) are provided in groups of two. The arc clamp plate (120) is located at the bottom of the sealing ring cover (116).

4. The testing equipment for the production of aero-engine fuel injectors according to claim 3, characterized in that: Both ends of the first crossbar (118) and the second crossbar (119) pass through the side box (103) and extend into the interior of the side box (103). The right end of the first crossbar (118) and the left end of the second crossbar (119) are fixedly connected to an arc-shaped abutment (121) that cooperates with the U-shaped seat (104). An insertion interface (122) is provided on the opposite side of the two arc-shaped abutments (121). A magnetic block (123) that cooperates with the magnetic plate (109) is fixedly connected to the opposite side of the two arc-shaped abutments (121) through an opening. A lifting rod (124) is fixedly connected to the bottom of the arc-shaped abutment (121) through a fixing block. A toothed plate frame (125) that meshes with the gear (108) is slidably installed on the surface of the lifting rod (124). A second spring (126) is sleeved on the surface of the lifting rod (124) and above the toothed plate frame (125).

5. The testing equipment for the production of aero-engine fuel injectors according to claim 1, characterized in that: The front of both sides of the top of the base plate (101) is fixedly connected to a sloping top plate (127). The rear of both sides of the top of the base plate (101) is slidably installed with a pull-back spring rod (128) via a sliding plate. The front end of the pull-back spring rod (128) is fixedly connected to a U-shaped plate (129) that cooperates with the sloping top plate (127). A third spring (130) is sleeved on the surface of the pull-back spring rod (128).

6. The testing equipment for the production of aero-engine fuel injectors according to claim 4, characterized in that: The oil cleaning mechanism (2) includes a square frame (201), and the square frame (201) is located at the front of the square support frame (102). Both sides of the square frame (201) are fixedly connected with L-shaped rods (202), and the rear ends of the L-shaped rods (202) pass through the side box (103) and the U-shaped seat (104) in sequence and extend to the rear of the side box (103). One end of the L-shaped rod (202) extending to the rear of the side box (103) is fixedly connected with a trapezoidal block (203) that cooperates with the rectangular opening (131) and the arc-shaped abutment (121). The surface of the square frame (201) is fixedly installed with a lower arc plate (204) by a bracket, and several lower arc plates (204) are provided.

7. The testing equipment for the production of aero-engine fuel injectors according to claim 6, characterized in that: The rear of the square frame (201) is fixedly connected to a base plate (205), and several base plates (205) are provided. The front and rear parts of the bottom of the inner cavity of the base plate (205) are provided with sliding grooves (206). A lever (207) is slidably installed on the inner side of the sliding groove (206). An elastic piece (208) that cooperates with the base plate (205) is fixedly connected between the top ends of the two levers (207). An oil-absorbing paper (209) is provided on the top of the elastic piece (208). A positioning base rod (210) is fixedly connected to the bottom of the base plate (205). U-shaped plates (211) that cooperate with the levers (207) are slidably installed on both sides of the surface of the positioning base rod (210). A fourth spring (212) is sleeved on both sides of the surface of the positioning base rod (210).

8. The testing equipment for the production of aero-engine fuel injectors according to claim 7, characterized in that: The rear of the square support frame (102) is fixedly connected to an arched frame (213), and a triangular plate (214) for use with a U-shaped card plate (211) is fixedly installed on the surface of the arched frame (213), and several triangular plates (214) are provided.

9. The testing equipment for the production of aero-engine fuel injectors according to claim 8, characterized in that: A guide rod (215) is fixedly connected to the surface of the side box (103). A pull plate (216) is slidably installed between the surfaces of the two guide rods (215). A round hole frame (217) is fixedly connected to the rear of the pull plate (216) through a bracket. An air cylinder (218) is slidably installed on the inner side of the round hole frame (217). A pressure rod (219) is fixedly connected to the rear of the pull plate (216). The rear end of the pressure rod (219) extends to the inner side of the air cylinder (218). A fifth spring (220) is sleeved on the surface of the pressure rod (219).

10. The testing equipment for manufacturing aero-engine fuel injectors according to claim 9, characterized in that: The surface of the air cylinder (218) is provided with a first air hole (221), and an air bag ring (222) is fixedly connected to the rear part of the surface of the air cylinder (218). A second air hole (223) is provided on the surface of the air cylinder (218) and inside the air bag ring (222). Vertical rods (224) are fixedly connected to both sides of the bottom of the round hole frame (217), and an arc-shaped bottom block (225) that cooperates with the U-shaped plate (129) and the inclined top plate (127) is slidably installed on the surface of the vertical rod (224).

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