Marine diesel engine piston cooling nozzle inspection tool

Abstract

The present invention relates to the field of cooling nozzle detection technology, and discloses a marine diesel engine piston cooling nozzle detection tool, which includes a tool body and a simulation chamber. The bottom of the tool body is designed with a mounting surface, and the mounting surface is used to simulate the assembly surface of an actual diesel engine cylinder body. Two positioning pin holes are provided on the mounting surface, and four end face pins are distributed in a rectangular shape on the outside of the four corners of the mounting surface, wherein the surfaces of the two end face pins diagonally opposite to each other are provided with a first detection hole, and two inclined inclined plates are integrally connected at the edge of the upper surface of the tool body, and one side of the surface of the two inclined plates is provided with a second detection hole. The present design adopts an integrated design, and when detecting and identifying the position of the nozzle shape size of the cooling nozzle, the spatial matching position accuracy of the nozzle inner hole and the inner cooling oil channel hole of the piston can also be effectively detected and identified, thereby improving the detection degree of the injection accuracy of the piston cooling nozzle product and improving the product quality.

Description

Technical Field

[0001] The invention relates to the technical field of cooling nozzle detection, in particular to a cooling nozzle detection tool for a marine diesel engine piston. Background Art

[0002] At present, in order to reduce the heat load of the piston, most marine high-speed and high-power diesel engines are equipped with piston cooling nozzles (see the attached manual). Figure 7 The piston cooling nozzle shown in the figure sprays engine oil into the piston cooling oil channel to cool the piston. This requires that the assembled cooling nozzle itself, on the one hand, maintains a certain design gap with the surrounding pistons, crankshafts, connecting rods and other moving parts, and on the other hand, ensures that the injected engine oil can be accurately sprayed into the oil inlet of the piston cooling oil channel, which places very high demands on the spatial position accuracy of the cooling nozzle product nozzle. The current spatial position accuracy of the nozzle of cooling nozzle products cannot be effectively detected and identified during the production process. The existing detection technology uses a special inspection fixture for detection, which is mainly composed of three parts: a fixed seat, a nozzle insertion hole and a pin. The detection principle is to place the nozzle product on the fixed seat, insert the nozzle into the corresponding inspection fixture hole to determine whether the position of the outer cylindrical surface of the nozzle is qualified, and finally insert the pin into the inner hole of the product nozzle to determine whether the position of the inner hole is qualified.

[0003] However, the existing detection technology or detection tooling can only use independent detection equipment to detect the position of the outer cylindrical surface and the inner hole of the nozzle, and cannot simultaneously detect the spatial position of the inner hole of the nozzle extending to the target hole, or only detect the spatial position of the inner hole of the nozzle extending to the target hole. It is impossible for one detection device to simultaneously realize the accuracy detection of the external dimensions of the nozzle product and the accuracy detection of the spatial position matching between the nozzle and the cooling oil channel hole in the piston; this will result in the target shooting efficiency and accuracy of the nozzle product cannot be detected and identified in a timely and effective manner; if the unqualified product is sent to the customer for installation, it will cause the piston to fail due to failure to cool and lubricate in time, causing cylinder pulling failure, causing immeasurable and irreparable economic losses to the customer and the company. Therefore, technical personnel in this field provide a marine diesel engine piston cooling nozzle detection tooling to solve the problems raised in the above background technology. Summary of the invention

[0004] The purpose of the present invention is to provide a marine diesel engine piston cooling nozzle detection tooling to solve the problem that the above-mentioned background technology can only detect the dimensional accuracy of the nozzle product to ensure that there is no interference with moving parts such as the piston, crankshaft, connecting rod after assembly, but cannot detect the spatial position matching accuracy of the nozzle and the cooling oil channel hole in the piston.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a marine diesel engine piston cooling nozzle detection tool, the detection tool comprising a tool body, one end face of the tool body is a simulation chamber, the other end face of the tool body is a mounting surface of a simulated cylinder body, the mounting surface is used to simulate the assembly surface of an actual diesel engine cylinder body, a chamber for assembling a piston cooling nozzle to be detected is provided on the mounting surface, and two positioning pin holes are provided on the outer side of the chamber;

[0006] Four end face pins are distributed in a rectangular shape at the corners of the mounting surface, wherein two end face pins at diagonally opposite corners are each provided with a first detection hole;

[0007] The tool body is integrally connected with inclined plates at both side edges of one end surface of the simulation chamber, and one side of the surface of the two inclined plates is provided with a second detection hole.

[0008] As a further solution of the present invention: one of the positioning pin holes is used to install a cylindrical pin; the other positioning pin hole is used to install a diamond pin.

[0009] As a further solution of the present invention: the two first detection holes correspond to the two second detection holes respectively, and the first detection holes and the second detection holes are located on the same center line.

[0010] As a further solution of the present invention, a measuring rod and a detection sleeve are also included for use with the detection tooling to complete the detection of the cooling nozzle.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the marine diesel engine piston cooling nozzle detection tool designed by the present invention is used for the cooling nozzle to be detected. By using the cooperation of the detection sleeve and the measuring rod, the nozzle shape size position of the cooling nozzle can be effectively detected and identified; the measuring rod can be used in conjunction with the detection tool to effectively detect and identify the spatial matching position accuracy of the nozzle inner hole and the inner cooling oil channel hole of the piston, thereby greatly improving the detection degree of the injection accuracy of the piston cooling nozzle product and improving the product quality; the detection of the nozzle shape size position of the cooling nozzle and the detection degree of the injection accuracy of the piston cooling nozzle product can be realized at the same time. The integrated design of the detection tool solves the tediousness of the existing cooling nozzle detection, which requires multiple detection equipment to coordinate the detection, and further improves the detection accuracy. It can detect and find the poor performance of the product in time during the product production process, so as to make timely adjustments, greatly improving the product qualification rate, on the one hand avoiding the economic losses caused by product scrapping, and on the other hand avoiding the flow of defective products to customers, causing immeasurable losses to the company. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the installation surface in the detection tooling;

[0013] Figure 2 It is a schematic diagram of the structure of the detection tooling;

[0014] Figure 3 This is a cross-sectional view of the cooling nozzle during inspection of the tooling;

[0015] Figure 4 This is a schematic diagram of the assembly of the test tool for testing the cooling nozzle;

[0016] Figure 5 It is the structural diagram of the measuring rod;

[0017] Figure 6 It is a schematic diagram of the structure of the detection set;

[0018] Figure 7 This is a schematic diagram of the structure of the piston cooling nozzle.

[0019] In the figure: 1. tooling body; 2. mounting surface; 3. measuring rod; 4. inspection sleeve; 5. positioning pin hole; 6. end face pin; 7. first inspection hole; 8. second inspection hole; 9. simulation chamber; 10. nozzle; 11. cooling nozzle; 12. inclined plate. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figures 1 to 7 In an embodiment of the present invention, the detection tool includes a tool body 1, one end face of the tool body 1 is a simulation chamber 9, and the other end face of the tool body 1 is a mounting surface 2 of a simulated cylinder body, and a chamber for assembling a piston cooling nozzle to be detected is provided on the mounting surface 2, and two locating pin holes 5 are provided on the outer side of the chamber; one of the locating pin holes 5 is used to install a cylindrical pin, and the other locating pin hole 5 is used to install a diamond pin.

[0022] like Figure 1 As shown, four end surface pins 6 are distributed in a rectangular shape at the corners of the mounting surface 2 , wherein two end surface pins 6 at diagonally opposite corners are each provided with a first detection hole 7 .

[0023] like Figure 1 , Figure 2 and Figure 3As shown, the tooling body 1 is integrally connected with an inclined plate 12 at the edges of both sides of one end face of the simulation chamber 9, and a second detection hole 8 is opened on one side of the surface of the two inclined plates 12; the two first detection holes 7 correspond to the two second detection holes 8 respectively, and the first detection holes 7 and the second detection holes 8 are on the same center line.

[0024] Through the cooperation of the mounting surface 2 and the positioning pin hole 5, the cooling nozzle 11 to be tested can be installed and fixed on the tooling body 1, and the position of the cooling nozzle 11 can be ensured, so that the nozzle 10 on the cooling nozzle 11 can correspond to the first detection hole 7, wherein the first detection hole 7 is used to detect the accuracy of the external position size of the nozzle 10 itself, and the second detection hole 8 simulates the oil inlet hole of the cooling oil channel in the diesel engine piston, which is the spatial position at the top dead center of the piston, and is used to detect and determine whether the oil column injection can accurately penetrate the spatial position accuracy of the hole. The cooling nozzle 11 to be tested is assembled on the mounting surface 2 of the tooling body 1 through the positioning pin hole 5.

[0025] like Figure 5 and 6 As shown, a measuring rod 3 and a detection sleeve 4 are also provided for use in conjunction with the detection tool to detect the quality of the piston cooling nozzle.

[0026] The specific operation method of the detection tool designed by the present invention is as follows:

[0027] In this embodiment: the distance between the inclined plate 12 and the end face pin 6 plus the sum of the thicknesses of the inclined plate 12 and the end face pin 6 is equal to 210 mm, the inner diameter of the first detection hole 7 is 12 mm, and the inner diameter of the second detection hole 8 is 10 mm; the outer diameter of the detection sleeve 4 is 12 mm, the inner diameter is 8.5 mm, and the length of the detection sleeve 4 is 20 mm, the length of the measuring rod 3 is 250 mm, the diameter is 8 mm, and the diameter deviation of the measuring rod 3 is ±0.01 mm.

[0028] The first step is to assemble the cooling nozzle 11 onto the mounting surface 2 at the bottom of the tooling body 1 using the positioning pin hole 5, and ensure the position of the cooling nozzle 11 so that the nozzle 10 corresponds to the first detection hole 7;

[0029] The second step is, Figure 3 As shown, the tool body 1 is turned over so that the second detection hole 8 is turned over to be horizontal and upward, and then the detection sleeve 4 is placed in the first detection hole 7. If the detection sleeve 4 can be easily placed in or taken out of the first detection hole 7, and the outer circumferential surface of the nozzle 10 of the cooling nozzle 11 does not interfere with the detection sleeve 4, it is determined that the outer shape position size of the nozzle 10 of the cooling nozzle 11 is qualified, otherwise, it is unqualified;

[0030] In the third step, the measuring rod 3 is inserted from the top of the second detection hole 8, requiring that the measuring rod 3 does not interfere with the second detection hole 8, and passes through the second detection hole 8 and the first detection hole 7 respectively, and then inserted into the inner hole of the nozzle 10. If the upper end of the measuring rod 3 does not interfere with the first detection hole 7, it is determined that the spatial position size of the nozzle 10 of the cooling nozzle 11 is qualified, otherwise, it is unqualified. When the measuring rod 3 is inserted into the inner hole of the nozzle 10, it does not interfere with the inner wall of the nozzle 10, and it is determined that the inner hole size of the nozzle 10 is qualified, otherwise, it is unqualified.

[0031] According to the above detection method, it can be ensured that the piston cooling nozzle 11 does not interfere with moving parts such as the piston, connecting rod, and crankshaft after installation, and at the same time ensure that the engine oil sprayed by the nozzle 10 can accurately enter the oil inlet hole of the inner cooling oil channel of the piston. The detection tooling designed in this invention can not only effectively detect and identify the position of the outer dimensions of the nozzle 10, but also effectively detect and identify the spatial matching position accuracy of the inner hole of the nozzle 10 and the inner cooling oil channel hole of the piston, thereby greatly improving the detection degree of the oil injection accuracy of the cooling nozzle 11 and improving product quality.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. Marine diesel engine piston cooling nozzle detection tooling, characterized in that: The detection tool comprises a tool body (1), one end surface of the tool body (1) is a simulation chamber (9), the other end surface of the tool body (1) is a mounting surface (2) of a simulated cylinder body, a chamber for assembling a piston cooling nozzle to be detected is provided on the mounting surface (2), and two positioning pin holes (5) are provided on the outer side of the chamber; Four end surface pins (6) are distributed in a rectangular shape at the corners of the mounting surface (2), wherein two end surface pins (6) at diagonally opposite corners are each provided with a first detection hole (7); The tool body (1) is integrally connected with inclined plates (12) at both side edges of one end surface of the simulation chamber (9), and a second detection hole (8) is provided on one side of the surface of the two inclined plates (12).

2. The marine diesel engine piston cooling nozzle detection tool according to claim 1, characterized in that: One of the positioning pin holes (5) is used to install a cylindrical pin, and the other positioning pin hole (5) is used to install a diamond pin.

3. The marine diesel engine piston cooling nozzle detection tool according to claim 1, characterized in that: The two first detection holes (7) correspond to the two second detection holes (8) respectively, and the first detection holes (7) and the second detection holes (8) are located on the same center line.

4. The marine diesel engine piston cooling nozzle detection tool according to any one of claims 1 to 3, characterized in that: Also included in the detection tooling for completing the detection of the cooling nozzle is a measuring rod (3) and a detection sleeve (4).

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