A clamping fixture for scraper ring of fuel engine

Abstract

The present invention relates to a clamping fixture for a scraper ring of a fuel engine, comprising a loading rod and a clamp body arranged on the loading rod, the upper and lower ends of the clamp body are provided with upper and lower clamping plates for clamping the scraper ring clamped on the clamp body, the clamp body is composed of a cylindrical clamp tube, the bottom of the clamp tube is provided with a first assembly hole for the loading rod to be inserted and assembled, and the outer wall surface of the clamp tube is provided with convex strips protruding from the outer wall surface arranged along the length of the clamp tube. The clamping fixture provided by the present invention can reliably clamp the scraper ring, improve the efficiency of the scraper ring clamping operation and the loading amount, and ensure the quality of the scraper ring coating treatment.

Description

Technical Field

[0001] The invention relates to the field of scraper ring production, and in particular to a clamping fixture for scraper rings of fuel engines. Background Art

[0002] The piston ring is the core component inside the fuel engine. It completes the sealing of fuel gas together with the cylinder and piston. The fuel engine piston ring is divided into three categories: oil ring, gas ring and scraper ring. It has the functions of sealing, oil control, heat conduction and guidance. It is widely used in various power machinery, such as steam engine, diesel engine, gasoline engine, compressor, etc.

[0003] The forces acting on the piston ring include gas pressure, the ring's own elastic force, the inertia of the ring's reciprocating motion, the friction between the ring and the cylinder and the ring groove, etc. Due to the action of these forces, the ring will produce basic movements such as axial movement, radial movement, and rotational movement. In addition, due to its movement characteristics, the piston ring is accompanied by irregular movement, and it is inevitable that there will be suspension and axial vibration caused by axial irregular movement, radial irregular movement and vibration, twisting movement, etc., so there are extremely high requirements for the wear resistance, hardness and other properties of the piston ring. At the same time, the working environment of the piston ring is a high-temperature environment, and various compressed air, gas, lubricating oil, and substances produced after combustion are mixed with the piston ring, so there are also extremely high requirements for the corrosion resistance, thermal stability and other properties of the piston ring. Piston ring surface treatment technology can significantly improve its performance, such as thermal spraying, electroplating, chrome plating, gas nitriding, vacuum coating, surface coating, zinc-manganese phosphating, etc. Among them, vacuum coating is the most advanced treatment method, which can significantly improve the wear resistance, corrosion resistance, thermal stability, etc. of the piston ring, greatly improving the function of the piston ring, so the piston ring has a great demand for surface coating treatment.

[0004] Due to the notched shape and different sizes of the piston ring, there is no suitable fixture to clamp the piston ring during surface coating, which affects the efficiency and quality of the coating. The scraper ring is a special type of piston ring. Due to its extremely thin thickness and tiny notch, the scraper ring and other piston rings cannot use similar clamping fixtures. The clamping of the scraper ring has always been time-consuming, laborious, and uneven, so it is necessary to solve this problem. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a clamping fixture for a scraper ring of a fuel engine, which can effectively improve the efficiency of the scraper ring clamping operation and the furnace loading capacity.

[0006] The technical solution adopted by the present invention is specifically as follows.

[0007] A clamping fixture for a scraper ring of a fuel engine, characterized in that it includes a loading rod and a clamp body arranged on the loading rod, the upper and lower ends of the clamp body are provided with upper and lower clamping plates for clamping the scraper ring clamped on the clamp body, the clamp body is composed of a cylindrical clamp tube, the bottom of the clamp tube is provided with a first assembly hole for the loading rod to be inserted and assembled, and the outer wall surface of the clamp tube is provided with a convex strip protruding from the outer wall surface along its body length.

[0008] The specific operation is: the tube mouth of the clamp tube is arranged downward, the clamp tubes are assembled in a stacked shape, and assembly connectors are arranged at the intersection of adjacent clamp tubes.

[0009] The fixture body is provided with a plating section, and the plating section is used for assembling the plating sheet.

[0010] An annular boss is arranged on the outer wall surface of the clamp tube at the tube mouth, and the distance between the outer surface of the convex strip and the center line of the clamp tube is consistent with the radius of the outer peripheral surface of the annular boss.

[0011] The assembly connecting piece and the bottom of the clamp tube are detachably assembled and connected. The assembly connecting piece is composed of a circular connecting plate. The connecting plate includes a first circular connecting plate body and a second circular connecting plate body that are arranged in an overlapping manner. The first circular connecting plate body is arranged closer to the bottom of the clamp tube than the second circular connecting plate body. The outer diameter of the first circular connecting plate body is larger than the outer diameter of the second circular connecting plate body. The outer diameter of the first circular connecting plate body is smaller than the inner tube diameter of the clamp tube. A second assembly hole for inserting and assembling the loading rod is provided in the middle of the connecting plate.

[0012] The accompanying plating section is composed of an accompanying plating clamping piece, which includes a cap-shaped cap body, which is detachably assembled on the bottom of the clamp tube in a covering shape, and a third assembly hole for the loading rod to be inserted and assembled is arranged at the bottom of the cap body, and a vacant portion and a clamping portion are arranged on the outer peripheral wall of the cap body, and the vacant portion is used for assembling with the convex strip, and the clamping portion includes two L-shaped clamping jaws arranged oppositely and a clamping block located between the two clamping jaws, and the distance between the clamping block and the cap bottom is greater than the distance between the clamping jaws and the cap bottom.

[0013] Two clamping parts are arranged opposite to each other on the outer peripheral wall of the cap body, and the vacant part is arranged between the two clamping parts.

[0014] The upper clamping plate is composed of a circular upper plate body, which includes a first circular upper plate body portion and a second circular upper plate body portion arranged in an overlapping manner. The first circular upper plate body portion is arranged closer to the bottom of the clamp tube than the second circular upper plate body portion. The outer diameter of the first circular upper plate body portion is greater than the outer diameter of the second circular upper plate body portion. The outer diameter of the first circular upper plate body portion is greater than the outer tube diameter of the clamp tube. A fourth assembly hole is provided in the middle of the upper plate body for inserting and assembling the loading rod.

[0015] The lower clamping plate is composed of a circular lower plate body, the outer diameter of the lower plate body is larger than the outer diameter of the clamp tube, and a fifth assembly hole for inserting and assembling the loading rod is arranged in the middle of the lower plate body.

[0016] The fixture cylinder, the upper and lower clamping plates, the accompanying plating clamping parts and the assembly connecting parts are made of stainless steel.

[0017] The clamping fixture provided by the present invention can reliably clamp the scraper ring, improve the efficiency of the scraper ring clamping operation and the furnace loading amount, and ensure the quality of the scraper ring coating treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of the clamp cylinder.

[0020] Figure 3 It is a schematic diagram of the structure of the plating fixture.

[0021] Figure 4 It is the assembly diagram of the upper clamping plate and the clamp cylinder.

[0022] Figure 5 It is a schematic diagram of the structure of the assembly connector.

[0023] Figure 6 It is a structural schematic diagram of the present invention in use state.

[0024] The reference numerals in the figure are: 100 - loading rod, 110 - clamp cylinder, 111 - convex strip, 112 - annular boss, 120 - upper clamp, 130 - lower clamp, 140 - plating clamp, 141 - vacant part, 142 - clamp, 143 - clamp block, 150 - assembly connector, 160 - scraper ring. Implementation

[0025] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0026] As used herein, the terms "parallel," "perpendicular," and the like are not limited to their strict geometric definitions, but include tolerances for reasonable and inconsistent machining or human errors.

[0027] like Figures 1 to 6As shown, a clamping fixture for a scraper ring 160 of a fuel engine comprises a loading rod 100 and a clamp body arranged on the loading rod 100, the upper and lower ends of the clamp body are provided with upper and lower clamping plates 130 for clamping the scraper ring 160 clamped on the clamp body, the clamp body is composed of a cylindrical clamp barrel 110, the bottom of the clamp barrel 110 is provided with a first assembly hole for inserting and assembling the loading rod 100, and the outer wall surface of the clamp barrel 110 is provided with a convex strip 111 protruding from the outer wall surface arranged along the length of the clamp barrel 110. The barrel mouth of the clamp barrel 110 is arranged downward, the clamp barrel 110 is assembled in a stacked shape, and an assembly connector 150 is provided at the intersection of adjacent clamp barrels 110. The outer diameter of the clamp tube 110 is 0.2 to 0.5 mm smaller than the inner diameter of the installed scraper ring 160, so that the scraper ring 160 can be easily put on the clamp tube 110 without being too loose; the height of the clamp tube 110 should match the effective coating height of the coating equipment used. For a short coating height (less than 300 mm), only one clamp tube 110 can be set; for a long coating height (greater than 300 mm), multiple clamp tubes 110 can be set. For example, for a coating height of 750 mm, three clamp tubes 110 with a height of 250 mm can be set; the tube height of the clamp tube 110 is set between 200 and 300 mm. A tube height that is too long will increase the difficulty of clamping and lead to increased damage and deformation of the port of the scraper ring 160 during the clamping process. A tube height that is too small will lead to an increase in the area between tubes and occupy the clamping space of the scraper ring 160.

[0028] The first assembly hole is used for inserting and assembling the loading rod 100. The shape and size are determined by the shape and size of the loading rod 100. There are usually three structures: circular, quadrilateral and hexagonal. Four threaded holes are reserved on the periphery of the first assembly hole for detachable assembly of the upper clamping plate 120, the assembly connector 150 and the accompanying plating clamp 140. The height of the convex strip 111 is consistent with the radial thickness of the corresponding scraper ring 160, and the width of the convex strip 111 is 0.1 to 0.2 mm smaller than the opening size of the corresponding scraper ring 160; the convex strip 111 can keep the scraper ring 160 clamped on the clamp tube 110 basically in a neat arrangement.

[0029] An annular boss 112 is provided on the outer wall surface at the mouth of the clamp barrel 110, and the distance between the outer surface of the convex strip 111 and the center line of the clamp barrel 110 is consistent with the radius of the outer peripheral surface of the annular boss 112. The outer diameter of the annular boss 112 is about 1.5 mm larger than the outer diameter of the clamp barrel 110. The annular boss 112 is used to support the scraper ring 160. The height of the annular boss 112 is about 1.5 mm. If the height is too large, it will occupy the clamping space of the scraper ring 160, and if it is too small, it will be easy to wear.

[0030] like Figure 3As shown, the fixture body is provided with a plating section, which is used to assemble the plating sheet. The plating section is composed of a plating clamp 140, which includes a cap body in the shape of a cap, which is detachably assembled on the bottom of the fixture tube 110, and a third assembly hole for inserting and assembling the loading rod 100 is provided at the bottom of the cap body, and a vacant portion 141 and a clamping portion are provided on the outer peripheral wall of the cap body, and the vacant portion 141 is used to assemble with the convex strip 111, and the clamping portion includes two L-shaped clamping jaws 142 arranged oppositely and a clamping block 143 located between the two clamping jaws 142, and the distance between the clamping block 143 and the bottom of the cap is greater than the distance between the clamping jaws 142 and the bottom of the cap. Two clamping portions are arranged oppositely on the outer peripheral wall of the cap body, and the vacant portion 141 is arranged between the two clamping portions. The accompanying plating clamp 140 is used to place the accompanying plating sheet. Due to the extremely thin characteristics of the scraper ring 160 itself, the key indicators of the film layer such as hardness and bonding strength cannot be directly tested on the scraper ring 160, so it is necessary to place the accompanying plating sheet when the scraper ring 160 is plated; the accompanying plating clamp 140 of the above structure can place the accompanying plating sheet while meeting the requirements of occupying the minimum clamping space of the scraper ring 160 and reflecting the film layer status to the greatest extent. The square accompanying plating sheet is clamped between the clamp block 143 and the clamp claw 142, which is convenient for assembly and unloading. Each furnace of the accompanying plating clamp 140 needs to have and only needs one rod. Placing too many will occupy the clamping space of the scraper ring 160.

[0031] like Figure 5 As shown, the assembly connector 150 and the bottom of the clamp tube 110 are detachably assembled and connected. The assembly connector 150 is composed of a circular connecting plate. The connecting plate includes a first circular connecting plate body and a second circular connecting plate body arranged in a superimposed manner. The first circular connecting plate body is arranged closer to the bottom of the clamp tube 110 than the second circular connecting plate body. The outer diameter of the first circular connecting plate body is greater than the outer diameter of the second circular connecting plate body. The outer diameter of the first circular connecting plate body is smaller than the inner diameter of the clamp tube 110. The middle part of the connecting plate is provided with a second assembly hole for inserting and assembling the loading rod 100. The assembly connector 150 and the bottom of the clamp tube 110 are connected and fixed by a stainless steel screw. The diameter (the outer diameter of the first circular connecting plate body) is smaller than the inner diameter of the clamp tube 110 by 0.1 to 0.2 mm. On the one hand, it can be covered by the clamp tube 110 above and does not occupy the clamping space of the scraper ring 160. On the other hand, it is used to limit the displacement of the clamp tube 110 placed above so that it will not deviate greatly. The thickness of the assembly connector 150 can be about 3 mm. If it is too thin, it will not play a limiting role, and if it is too thick, it will increase material consumption and weight, causing waste and making it difficult to operate.

[0032] like Figure 4As shown, the upper clamping plate 120 is composed of a circular upper plate body, which includes a first circular upper plate body and a second circular upper plate body arranged in a superimposed manner. The first circular upper plate body is arranged closer to the bottom of the clamp tube 110 than the second circular upper plate body. The outer diameter of the first circular upper plate body is greater than the outer diameter of the second circular upper plate body. The outer diameter of the first circular upper plate body is greater than the outer diameter of the clamp tube 110. The middle of the upper plate body is provided with a fourth assembly hole for inserting and assembling the loading rod 100. The main function of the upper clamping plate 120 is to be placed on the upper part of the uppermost clamp tube 110 to press the scraper ring 160, to cover the uppermost scraper ring 160 and prevent it from moving up and being lost. The lower clamping plate 130 is composed of a circular lower plate body. The outer diameter of the lower plate body is greater than the outer diameter of the clamp tube 110. The middle of the lower plate body is provided with a fifth assembly hole for inserting and assembling the loading rod 100. During specific operation, the structure of the lower clamping plate 130 can be set to be consistent with the structure of the upper clamping plate 120. Preferably, the clamping tube 110, the upper and lower clamping plates 130, the accompanying plating clamping piece 140, and the assembly connector 150 are made of stainless steel.

[0033] The clamping fixture provided by the present invention can reliably clamp the scraper ring 160 , thereby improving the efficiency of the clamping operation of the scraper ring 160 and the furnace loading amount, and ensuring the coating quality of the scraper ring 160 .

[0034] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A clamping fixture for a scraper ring of a fuel engine, characterized in that: The clamp body comprises a loading rod and a clamp body arranged on the loading rod, wherein the upper and lower ends of the clamp body are provided with upper and lower clamping plates for clamping a scraper ring clamped on the clamp body, the clamp body is composed of a cylindrical clamp tube, the bottom of the clamp tube is provided with a first assembly hole for inserting and assembling the loading rod, and the outer wall surface of the clamp tube is provided with convex strips protruding from the outer wall surface arranged along the length of the clamp tube; The tube mouth of the clamp tube is arranged downward, and the clamp tube is assembled in a stacked shape. An assembly connector is arranged at the intersection of adjacent clamp tubes; a plating section is arranged on the clamp body, and the plating section is used to assemble the plating sheet; the plating section is composed of a plating clamp, and the plating clamp includes a cap-shaped cap body, and the cap body is detachably assembled on the bottom of the clamp tube in a cover shape, and a third assembly hole for the loading rod to be inserted and assembled is arranged at the bottom of the cap body, and a vacant part and a clamping part are arranged on the outer peripheral wall of the cap body, and the vacant part is used to assemble with the convex strip, and the clamping part includes two oppositely arranged An L-shaped clamping jaw and a clamping block located between the two clamping jaws, and the distance between the clamping block and the bottom of the cap is greater than the distance between the clamping jaw and the bottom of the cap; the upper clamping plate is composed of a circular upper plate body, and the upper plate body includes a first circular upper plate body portion and a second circular upper plate body portion arranged in an overlapping manner, the first circular upper plate body portion is arranged closer to the bottom of the clamp tube than the second circular upper plate body portion, the outer diameter of the first circular upper plate body portion is greater than the outer diameter of the second circular upper plate body portion, the outer diameter of the first circular upper plate body portion is greater than the outer tube diameter of the clamp tube, and a fourth assembly hole for the loading rod to be inserted and assembled is set in the middle of the upper plate body.

2. The clamping fixture for the scraper ring of a fuel engine according to claim 1, characterized in that: An annular boss is arranged on the outer wall surface of the clamp tube at the tube mouth, and the distance between the outer surface of the convex strip and the center line of the clamp tube is consistent with the radius of the outer peripheral surface of the annular boss.

3. The clamping fixture for the scraper ring of a fuel engine according to claim 1, characterized in that: The assembly connecting piece and the bottom of the clamp tube are detachably assembled and connected. The assembly connecting piece is composed of a circular connecting plate. The connecting plate includes a first circular connecting plate body and a second circular connecting plate body that are arranged in an overlapping manner. The first circular connecting plate body is arranged closer to the bottom of the clamp tube than the second circular connecting plate body. The outer diameter of the first circular connecting plate body is larger than the outer diameter of the second circular connecting plate body. The outer diameter of the first circular connecting plate body is smaller than the inner tube diameter of the clamp tube. A second assembly hole for inserting and assembling the loading rod is provided in the middle of the connecting plate.

4. The clamping fixture for the scraper ring of a fuel engine according to claim 1, characterized in that: Two clamping parts are arranged opposite to each other on the outer peripheral wall of the cap body, and the vacant part is arranged between the two clamping parts.

5. The clamping fixture for the scraper ring of a fuel engine according to claim 1, characterized in that: The lower clamping plate is composed of a circular lower plate body, the outer diameter of the lower plate body is larger than the outer diameter of the clamp tube, and a fifth assembly hole for inserting and assembling the loading rod is arranged in the middle of the lower plate body.

6. The clamping fixture for the scraper ring of a fuel engine according to claim 1, characterized in that: The fixture cylinder, the upper and lower clamping plates, the accompanying plating clamping parts and the assembly connecting parts are made of stainless steel.

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