阅读说明：本技术 一种航空发动机进气可调叶片修磨机及修磨方法 (Grinding machine and grinding method for air inlet adjustable blade of aero-engine ) 是由 张杨 田雷云 王波 王嘉成 张迪 于 2021-09-01 设计创作，主要内容包括：本发明提供一种航空发动机进气可调叶片修磨机及修磨方法,所述修磨机：包括底座,以及底座上安装的砂带传动系统和叶片进给系统,所述砂带传动系统上装有砂带,所述叶片进给系统上设有叶片压紧机构,所述叶片压紧机构用于压紧安装在叶片进给系统上的叶片,所述叶片通过叶片进给系统靠近砂带进行修磨。本发明所述修磨机,结合修磨工艺流程控制实现可调叶片快速精确修磨,与现有技术采用胶带包裹保护叶片、虎钳固定叶身、板锉手工修磨和砂纸手动抛光方法想比,采用电动砂带磨,凹槽快速定位固定叶片,手轮精确控制进给量的方法,可大大提高修磨质量和效率,降低劳动强度,长度和角度的精度能够可靠保证,并避免叶片安装边的磨伤。(The invention provides an aeroengine air inlet adjustable blade sharpening machine and a sharpening method, wherein the sharpening machine comprises the following components: the abrasive belt grinding machine comprises a base, and an abrasive belt transmission system and a blade feeding system which are arranged on the base, wherein an abrasive belt is arranged on the abrasive belt transmission system, a blade pressing mechanism is arranged on the blade feeding system, the blade pressing mechanism is used for pressing a blade arranged on the blade feeding system, and the blade is ground close to the abrasive belt through the blade feeding system. Compared with the prior art which adopts the methods of wrapping and protecting the blades by using an adhesive tape, fixing the blade body by using a vice, manually polishing by using a flat file and manually polishing by using abrasive paper, the sharpening machine disclosed by the invention adopts the method of electrically grinding the abrasive tape, quickly positioning and fixing the blades by using the grooves and accurately controlling the feeding amount by using the hand wheel, so that the sharpening quality and efficiency can be greatly improved, the labor intensity is reduced, the accuracy of the length and the angle can be reliably ensured, and the grinding damage of the mounting edge of the blade is avoided.)

1. The utility model provides an aeroengine adjustable blade sharpening machine of admitting air which characterized in that: the abrasive belt grinding machine comprises a base, and an abrasive belt transmission system and a blade feeding system which are arranged on the base, wherein an abrasive belt is arranged on the abrasive belt transmission system, a blade pressing mechanism is arranged on the blade feeding system, the blade pressing mechanism is used for pressing a blade arranged on the blade feeding system, and the blade is ground close to the abrasive belt through the blade feeding system.

2. The aircraft engine air inlet adjustable blade sharpening machine of claim 1, characterized in that: the abrasive belt transmission system comprises a motor and an abrasive belt support frame, the motor and the abrasive belt support frame are respectively fixed on a base, a driving rotating rod and a driven rotating rod which can rotate are arranged on the abrasive belt support frame, the driving rotating rod is connected with an output shaft of the motor through a transmission belt, and the driving rotating rod is connected with the driven rotating rod through an abrasive belt sleeved on the outer side of the rotating rod.

3. The aircraft engine air inlet adjustable blade sharpening machine of claim 2, characterized in that: the two driven rotating rods are provided, and the abrasive belt surface formed by the abrasive belts on the two driven rotating rods is parallel to the end surface to be polished of the blade on the blade feeding system.

4. The aircraft engine air inlet adjustable blade sharpening machine of claim 1, characterized in that: the blade feeding system comprises a slide way, a lead screw, a slide block and a hand wheel; the sliding block is arranged on the slideway in a sliding manner; a screw sleeve is fixed on the slide way, a blade groove is arranged on the upper surface of the slide block, a notch is arranged on the lower part of the slide block, the screw rod is arranged in the notch and is in threaded connection with the screw sleeve, and two ends of the screw rod are rotatably arranged on the slide block; and a hand wheel connected with the lead screw is arranged on the side surface of the sliding block.

5. The aircraft engine air inlet adjustable blade sharpening machine of claim 4, characterized in that: and a scale value is arranged on the hand wheel and corresponds to the sliding displacement of the sliding block on the slide way.

6. The aircraft engine air inlet adjustable blade sharpening machine of claim 4, characterized in that: the blade hold-down mechanism comprises a support, a pressing rod, a connecting rod I, a connecting rod II, a right-angle rod, a pressing seat and a pressing block, wherein the support is fixed on the upper surface of the sliding block, one end of the connecting rod I is hinged to the support, the other end of the connecting rod I is hinged to the connecting rod II and the pressing rod, the connecting rod II is hinged to the right-angle end of the right-angle rod, one end of the other two end points of the right-angle rod is hinged to the support, the other end point of the other end point is hinged to the pressing seat, the pressing seat is provided with the pressing block, and the pressing block is used for pressing the blades in the grooves.

7. The aircraft engine air inlet adjustable blade sharpening machine of claim 6, characterized in that: and a soft rubber cushion is arranged at the contact part of the pressing block and the blade.

8. The aircraft engine air inlet adjustable blade sharpening machine of claim 6, characterized in that: the number of the blade grooves is two, and the two blade grooves are respectively matched with the profile of the blade which is horizontally placed and the profile of the blade which is turned over by 180 degrees; an independent blade pressing mechanism is arranged beside each blade groove.

9. A sharpening method based on the sharpening machine as claimed in any one of claims 1-8, comprising the following steps:

(1) blade trial assembly and measurement

Installing the blades on a support plate of an air inlet casing, and calculating the required grinding amount of two end faces of the blades;

(2) blade positioning and pressing

Placing the blades in the corresponding blade grooves to enable the end surfaces to be polished to be parallel to the abrasive belt surface; pressing the blades by a blade pressing mechanism;

(3) grinding the end faces of the blades

And (3) starting a belt transmission system, controlling the feeding amount of the blade through a blade feeding system according to the end face grinding amount determined in the step (1), enabling the blade to be close to the belt to grind and remove the end face until grinding is finished, and repeating the steps (2) and (3) to finish grinding of the other end face.

Technical Field

The invention relates to an adjustable air inlet blade of an aircraft engine, in particular to a sharpening machine and a sharpening method for the adjustable air inlet blade of the aircraft engine.

Background

The adjustable air inlet blade of the aero-engine is arranged on the tail edge of the support plate of the air inlet casing, and flexible deflection of the circumferential adjustable blade is achieved through the linkage mechanism, so that the air inlet quantity and the air inlet direction of the engine are controlled, and the adjustable air inlet blade is an important part for adjusting the working state of the engine. In the use process of an engine, due to the influence of factors such as air flow scouring, abrasion in the movement process of adjustable blades, deformation of a casing and the like, when the engine is reassembled, the problem of the gap tolerance of the adjustable blades often occurs, the end faces of the adjustable blades need to be precisely polished, the gap requirement between the adjustable blades and the rear section of an inner ring is ensured, the conventional blade polishing process adopts the methods of adhesive tape protection, vice clamping, manual plate file polishing and abrasive paper polishing, and the problems of blade body clamping, mounting edge polishing, uneven polishing, difficulty in controlling the polishing size, large influence of artificial factors, low qualification rate and efficiency, high cost and the like exist.

Disclosure of Invention

The invention aims at overcoming the defects of the prior art and provides a grinding machine and a grinding method for an air inlet adjustable blade of an aero-engine, so that the purposes of shortening the repair period of the adjustable blade, improving the product quality and the qualification rate and reducing the cost are achieved.

The technical scheme adopted by the invention for solving the technical problems is as follows: the technical scheme adopted by the invention for solving the technical problems is as follows: the grinding machine comprises a base, and an abrasive belt transmission system and a blade feeding system which are arranged on the base, wherein an abrasive belt is arranged on the abrasive belt transmission system, a blade pressing mechanism is arranged on the blade feeding system, the blade pressing mechanism is used for pressing a blade arranged on the blade feeding system, and the blade is ground by approaching the abrasive belt through the blade feeding system.

Furthermore, the abrasive belt transmission system comprises a motor and an abrasive belt support frame, the motor and the abrasive belt support frame are respectively fixed on the base, a driving rotating rod and a driven rotating rod which can rotate are arranged on the abrasive belt support frame, the driving rotating rod is connected with an output shaft of the motor through a transmission belt, and the driving rotating rod is connected with the driven rotating rod through an abrasive belt sleeved on the outer side of the rotating rod.

Furthermore, the number of the driven rotating rods is two, and an abrasive belt surface formed by abrasive belts on the two driven rotating rods is parallel to the end surface to be polished of the blade on the blade feeding system.

Further, the blade feeding system comprises a slide way, a lead screw, a slide block and a hand wheel; the sliding block is arranged on the slideway in a sliding manner; a screw sleeve is fixed on the slide way, a blade groove is arranged on the upper surface of the slide block, a notch is arranged on the lower part of the slide block, the screw rod is arranged in the notch and is in threaded connection with the screw sleeve, and two ends of the screw rod are rotatably arranged on the slide block; and a hand wheel connected with the lead screw is arranged on the side surface of the sliding block.

Furthermore, a scale value is arranged on the hand wheel, and the scale value corresponds to the sliding displacement of the sliding block on the sliding way.

Further, blade hold-down mechanism includes support, depression bar, connecting rod I, connecting rod II, right angle pole, pressure seat and briquetting, the support is fixed at the slider upper surface, and connecting rod I one end is articulated with the support, and the other end is articulated with connecting rod II and depression bar, connecting rod II is articulated with the right angle end of right angle pole, two other extreme points of right angle pole, an end point and support are articulated, and another end point is articulated with the pressure seat, be equipped with the briquetting on the pressure seat, the briquetting is used for compressing tightly the blade in the recess.

Furthermore, a soft rubber cushion is arranged at the contact part of the pressing block and the blade.

Furthermore, as the blade structure is not symmetrical, the number of the blade grooves is two, and the two blade grooves are respectively matched with the profile of the blade which is horizontally placed and the profile of the blade which is turned over for 180 degrees; an independent blade pressing mechanism is arranged beside each blade groove.

The invention also provides a grinding method based on the grinding machine, which comprises the following steps:

(1) blade trial assembly and measurement

Installing the blades on a support plate of an air inlet casing, and calculating the required grinding amount of two end faces of the blades;

(2) blade positioning and pressing

Placing the blades in the corresponding blade grooves to enable the end surfaces to be polished to be parallel to the abrasive belt surface; pressing the blades by a blade pressing mechanism;

(3) grinding the end faces of the blades

And (3) starting a belt transmission system, controlling the feeding amount of the blade through a blade feeding system according to the end face grinding amount determined in the step (1), enabling the blade to be close to the belt to grind and remove the end face until grinding is finished, and repeating the steps (2) and (3) to finish grinding of the other end face.

Compared with the prior art, the invention has the beneficial effects that:

the invention designs a special mechanical sharpening machine aiming at the structural characteristics of the air inlet adjustable blade and the end face sharpening requirement, and realizes the rapid and accurate sharpening of the adjustable blade by combining the sharpening process flow control. Compared with the prior art that the blade is wrapped and protected by an adhesive tape, the blade body is fixed by a vice, the blade is manually ground by a flat file and the feeding amount is accurately controlled by a hand wheel, the grinding quality and efficiency can be greatly improved, the labor intensity is reduced, the precision of the length and the angle can be reliably ensured, and the grinding damage of the mounting edge of the blade is avoided by adopting a method of electric abrasive belt grinding, quickly positioning and fixing the blade by a groove and accurately controlling the feeding amount by the hand wheel.

Drawings

FIG. 1 is a structural diagram of an aero-engine air inlet adjustable blade sharpening machine according to the present invention;

FIG. 2 is a structural view of a blade feeding system in the sharpening machine according to the present invention;

FIG. 3 is a structural diagram of a blade pressing mechanism in the sharpening machine according to the present invention;

FIG. 4 is a block diagram of a blade to be sharpened in an embodiment of the present invention.

Reference numerals:

1-a base; 2-a blade feed system; 3, sanding belt; 4-a blade hold-down mechanism; 5-abrasive belt support frame; 6-active rotating rod; 7-driven rotating rod; 8-motor output shaft; 9-a transmission belt; 10-slideway, 11-screw rod, 12-slide block and 13-hand wheel; 14-a bearing; 15-thread bushing; 16-bracket, 17-pressure bar, 18-connecting rod I, 19-connecting rod II and 20-right-angle bar; 21-pressing a base; 22-briquetting; 23-pin shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 3, the aero-engine air inlet adjustable blade sharpening machine comprises a base 1, and an abrasive belt transmission system and a blade feeding system 2 which are installed on the base, wherein an abrasive belt 3 is installed on the abrasive belt transmission system, a blade pressing mechanism 4 is arranged on the blade feeding system, the blade pressing mechanism is used for pressing a blade installed on the blade feeding system, and the blade is sharpened by approaching the abrasive belt through the blade feeding system.

The abrasive belt transmission system comprises a motor and an abrasive belt support frame 5, the motor and the abrasive belt support frame are respectively fixed on a base, a driving rotating rod 6 and a driven rotating rod 7 which can rotate are arranged on the abrasive belt support frame, the driving rotating rod is connected with a motor output shaft 8 through a transmission belt 9, the driving rotating rod is connected with the driven rotating rod through an abrasive belt sleeved on the outer side of the rotating rod, the number of the driven rotating rods is two, and abrasive belt surfaces formed by abrasive belts on the two driven rotating rods are parallel to the end surfaces to be polished of blades on the blade feeding system.

The blade feeding system comprises a slide way 10, a lead screw 11, a slide block 12 and a hand wheel 13; the sliding block is arranged on the slideway in a sliding manner; a screw sleeve 15 is fixed in the middle of the slide way, a blade groove for placing a blade is formed in the upper surface of the sliding block, a notch is formed in the lower portion of the sliding block, the lead screw is arranged in the notch and is in threaded connection with the screw sleeve, and two ends of the lead screw are rotatably mounted on the sliding block through bearings 14; a hand wheel connected with the lead screw is arranged on the side surface of the sliding block; when the blade is arranged in the groove, the end surface to be polished of the blade is parallel to the surface of the abrasive belt.

The blade pressing mechanism comprises a support 16, a pressing rod 17, a connecting rod I18, a connecting rod II 19, a right-angle rod 20, a pressing seat 21 and a pressing block 22, the support is fixed on the upper surface of the sliding block, one end of the connecting rod I is hinged to the support, the other end of the connecting rod I is hinged to the connecting rod II and the pressing rod, the connecting rod II is hinged to the right-angle end of the right-angle rod through a pin shaft 23, the other two end points of the right-angle rod, one end point of the other end point of the right-angle rod is hinged to the support, the other end point of the right-angle rod is hinged to the pressing seat, the pressing seat is provided with the pressing block, and the pressing block is used for pressing the blades in the grooves. During operation, the pressing rod of the blade pressing mechanism is lifted, the pressing block is pressed downwards, and the pressing block is lifted when the pressing rod of the blade pressing mechanism is pressed downwards.

As an improvement of the technical scheme, in order to accurately control the feeding amount, a scale value is arranged on the hand wheel, and the scale value corresponds to the sliding displacement of the sliding block on the sliding way.

As an improvement of the technical scheme, in order to prevent the blade from being damaged by the pressing block, a soft rubber cushion is arranged at the contact part of the pressing block and the blade.

As the improvement of the technical proposal, as the blade structure is not symmetrical, the number of the blade grooves is two, which are respectively matched with the profile of the blade which is horizontally arranged and the profile of the blade which is turned over by 180 degrees (figure 4); an independent blade pressing mechanism is arranged beside each blade groove; when the position of the groove is arranged, the blade is ensuredWhen in coping, the grinding tool is not contacted with the abrasive belt.

The grinding method based on the grinding machine comprises the following steps:

(1) blade trial assembly and measurement

Installing the adjustable blade at the rear edge part of a support plate of the air inlet casing, and checking whether the adjustable blade rotates flexibly without clamping stagnation; then the adjustable blade is in a vertical state, a clearance between the end face of the adjustable blade and the rear section of the inner ring is measured by adopting a feeler gauge, the clearance (within 0.1 mm) required by a technical file is compared, the required grinding amount of the upper end face and the lower end face of the adjustable blade is calculated, and the grinding position is shown in an attached figure 4;

(2) blade positioning and pressing

Grinding the upper end surfaces of the adjustable blades toAs a reference, the blade is placed in a blade groove of a blade feeding system of the sharpening machine, positioned and compressedThe upper end surface of the blade can be ensured to be parallel to the abrasive belt, see figure 4;

grinding the lower end surface of the adjustable blade toPlacing the blade into a blade groove of a sharpening machine blade feeding system as a reference, positioning the blade, and pressingThe lower end face of the blade can be ensured to be parallel to the abrasive belt, see the attached figure 4;

(3) grinding the end faces of the blades

Starting a grinding belt transmission system, rotating a grinding machine hand wheel according to the grinding amount of the end face determined in the step (1), controlling the feeding amount of the blade through a blade feeding system, enabling the end face of the blade to be close to the grinding belt, grinding and removing the end face until grinding is finished, and repeating the steps (2) and (3) to finish grinding of the other end face;

(4) adjustable vane assembly

And installing the polished blade on the air inlet casing, measuring the gap between the end surface of the adjustable blade and the rear section of the inner ring, and confirming that the technical requirements are met.

The technical idea of the present invention is described in the above technical solutions, and the protection scope of the present invention is not limited thereto, and any changes and modifications made to the above technical solutions according to the technical essence of the present invention belong to the protection scope of the technical solutions of the present invention.