CN111546200A - Semi-closed pneumatic endoscopic polishing instrument - Google Patents
Semi-closed pneumatic endoscopic polishing instrument Download PDFInfo
- Publication number
- CN111546200A CN111546200A CN202010392571.XA CN202010392571A CN111546200A CN 111546200 A CN111546200 A CN 111546200A CN 202010392571 A CN202010392571 A CN 202010392571A CN 111546200 A CN111546200 A CN 111546200A
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- Prior art keywords
- semi
- impeller
- memory alloy
- endoscopic
- control box
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
- B24B23/026—Fluid driven
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/14—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding turbine blades, propeller blades or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/12—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece
Abstract
A semi-closed pneumatic endoscopic polishing instrument belongs to the technical field of intelligent manufacturing. The semi-closed pneumatic endoscopic polishing instrument comprises a control box, a probe rod, a semi-closed driving structure, an endoscope observation system and a pneumatic system, wherein the control box, the probe rod and the semi-closed driving structure are sequentially connected, the endoscope observation system is used for observing the work of the polishing instrument, the pneumatic system is used for driving a polishing head to rotate, the probe rod comprises a thin-walled tube, a memory alloy tube and an electric heating wire, the thin-walled tube is fixedly connected with the memory alloy tube, the electric heating wire is arranged inside the thin-walled tube and the memory alloy tube, one end of the electric heating wire is connected with a direct-current power supply inside the control box, the semi-closed driving structure comprises a base, an impeller and the polishing head, a wheel shaft of the impeller penetrates through the. The semi-closed pneumatic endoscopic grinding instrument is simple in structure and operation, convenient to carry and good in sealing performance, and can improve the flow field environment of the impeller and improve the utilization rate of wind energy.
Description
Technical Field
The invention relates to the technical field of intelligent manufacturing, in particular to a semi-closed pneumatic endoscopic grinding instrument.
Background
The aero-engine grinding instrument is a common device for repairing damaged parts of aero-engine blades, the existing grinding instrument usually carries out repairing operation under an open condition, and when the open head of the grinding instrument causes air pressure generated by an air source to drive a grinding head to rotate, the grinding head is not enough to generate sufficient torque, so that an expected grinding effect is difficult to realize. The appearance of polishing in addition when polishing, the impeller is easy to take place to interfere with other subassemblies for the appearance of polishing is not enough to reach the function of polishing. Meanwhile, the feeler lever of the traditional aircraft engine grinding instrument is a rigid straight pipe, the two-stage rotor blade can be directly ground by the grinding instrument, the rotor blade needing to be ground above the two stages often extends into the grinding instrument due to non-human factors such as inaccessible repair positions and the like, the rigidity of the feeler lever is difficult to ensure by the flexible feeler lever, and the bending of the feeler lever is difficult to control.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a semi-closed pneumatic endoscopic grinding instrument which is simple in structure and operation, convenient to carry and good in sealing performance, and can improve the flow field environment of an impeller and improve the utilization rate of wind energy.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a semi-closed pneumatic endoscopic grinding instrument comprises a control box, a probe rod, a semi-closed driving structure, an endoscope observation system and a pneumatic system, wherein the endoscope observation system is used for observing the work of the grinding instrument, and the pneumatic system is used for driving a grinding head to rotate;
the probe rod comprises a thin-wall tube, a memory alloy tube and an electric heating wire, the thin-wall tube is fixedly connected with the memory alloy tube, the electric heating wire is arranged inside the thin-wall tube and the memory alloy tube and is fixedly connected with the memory alloy tube, and one end of the electric heating wire is connected with a direct current power supply inside the control box;
the semi-closed driving structure comprises a base, an impeller and a polishing head; the wheel shaft of the impeller penetrates through the base to be connected with the polishing head, the base is provided with a windshield of a semicircular structure, and the position of the impeller corresponds to the position of the windshield.
The endoscope observation system adopts a flexible endoscope, an objective lens of the endoscope observation system is arranged at one end of the memory alloy tube close to the semi-closed driving structure, and an eyepiece of the endoscope observation system is arranged outside the control box.
An operating handle is arranged below the control box.
The pneumatic system comprises an air source and an air pipe which are connected with each other, one end of the air pipe is arranged at the joint of the control box and the thin-wall pipe, and the other end of the air pipe penetrates through the operating handle to be connected with the air source.
The memory alloy pipe is made of shape memory alloy, and preferably, the memory alloy pipe is made of zinc-gold-copper memory alloy.
The direct current power supply is provided with a power switch, and the power switch is arranged outside the control box.
The base is a cylindrical structure with a stepped hole arranged therein, and is provided with a bearing, and the bearing is a one-way bearing.
The shaft shoulder of the wheel shaft is positioned in the base and is abutted against the bearing, and the wheel shaft is in interference fit with the bearing.
The position of the impeller corresponds to the windshield, and specifically means that: the wind shield is positioned on the side surface of the impeller and is used for improving the gas flow field around the impeller when gas blows the impeller.
The shape of the impeller is the same as that of an impeller of a Savonius wind turbine, the number of the blades is 6, and the inclination angle of each blade is 80 degrees.
The invention has the beneficial effects that:
1) the semi-closed type wind power generator has the advantages of simple structure, safety, reliability and good sealing performance, can improve the flow field environment of the impeller and improve the utilization rate of wind energy, and can ensure that the impeller does not interfere with other parts when rotating by adopting a semi-closed type driving structure;
2) when the portable air source generates air pressure, the air acts on the impeller through the air pipe, so that the polishing head is driven to rotate at a high speed, sufficient torque can be provided to polish the blade in situ when the polishing head rotates, and the repairing effect of the polishing head is good;
3) the probe rod is provided with the memory alloy tube with the two-way memory characteristic, and the probe rod is deeply inserted into the engine when the probe rod is straightened through the characteristic that the two-way memory alloy tube can change the shape at a specific temperature, and is bent when the probe rod reaches a specified position, so that the grinding of the rotor blade above two stages is realized.
Additional features and advantages of the invention will be set forth in part in the detailed description which follows.
Drawings
Fig. 1 is a schematic structural diagram of a semi-closed pneumatic endoscopic sander according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a semi-enclosed driving structure provided in an embodiment of the present invention;
fig. 3 is a sectional view of a semi-enclosed drive structure provided by an embodiment of the present invention.
Reference numerals in the drawings of the specification include:
1-a control box, 2-a thin-wall tube, 3-a memory alloy tube, 4-an electric heating wire, 5-a semi-closed driving structure, 6-a polishing head, 7-an impeller, 8-a base, 9-a windshield, 10-a bearing, 11-an eyepiece, 12-an objective, 13-an air tube, 14-a direct current power supply, 15-an ear, 16-an operating handle and 17-a wheel shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In order to solve the problems in the prior art, as shown in fig. 1 to 3, the invention provides a semi-closed pneumatic endoscopic sander, which comprises a control box 1, a probe rod and a semi-closed driving structure 5, an endoscopic observation system for observing the operation of the sander and a pneumatic system for driving a sanding head 6 to rotate, which are connected in sequence;
the probe rod comprises a thin-wall tube 2, a memory alloy tube 3 and an electric heating wire 4, the thin-wall tube 2 is fixedly connected with the memory alloy tube 3, the electric heating wire 4 is arranged inside the thin-wall tube 2 and the memory alloy tube 3 and is fixedly connected with the memory alloy tube 3, and one end of the electric heating wire 4 is connected with a direct-current power supply 14 positioned inside the control box 1;
the semi-closed driving structure 5 comprises a base 8, an impeller 7 and a polishing head 6; the wheel axle 17 of the impeller 7 passes through the base 8 to be connected with the sanding head 6, the base 8 is provided with a windshield 9 with a semicircular structure, the position of the impeller 7 corresponds to the position of the windshield 9, and the position of the impeller 7 corresponds to the windshield 9 specifically means that: the dampers 9 are located on the sides of the impeller 7, and the dampers 9 serve to improve the flow field of the gas around the impeller 7 when the gas blows the impeller 7.
In this embodiment, the thin-walled tube 2 is made of stainless steel or aluminum alloy, the thin-walled tube 2 and the memory alloy tube 3 are fixed by welding, the electric heating wire 4 is a resistance wire with good electric conductivity, and is attached to the inner walls of the thin-walled tube 2 and the memory alloy tube 3, and is connected with the inner wall of the memory alloy tube 3 by welding or bonding, and one end of the electric heating wire passes through the control box 1 and is connected with the dc power supply 14 in the control box 1 to realize the bending of the memory alloy tube 3. The heating wire 4 is a heating element which generates heat after being electrified and converts electric energy into heat energy, the heating wire 4 is powered by a 24V voltage-stabilizing direct-current power supply 14, a power switch on the operation box controls the current of the heating wire 4, when the temperature of the heating wire 4 rises to be higher than 50 ℃, the shape of the memory alloy is not changed, the shape of the memory alloy is changed to be in a straight state, the polisher extends into the engine through an engine observation port at the moment, the polishing head 6 in threaded connection with the wheel shaft 17 reaches a specified polishing area, the power switch of the heating wire 4 is turned off, the temperature is reduced to enable the memory alloy to recover to be bent, and blade polishing is completed by adjusting the rotating speed.
As shown in fig. 1, the endoscopic observation system employs a flexible endoscope, an objective lens 12 of which is disposed at one end of the memory alloy tube 3 near the semi-enclosed drive structure 5, and an eyepiece lens 11 of which is disposed outside the control box 1. The flexible endoscope adopts the prior art, it passes thin wall pipe 2 and memory alloy pipe 3, make objective 12 be located the 3 tip of memory alloy pipe, eyepiece 11 is located the control box 1 outside, whether operating personnel reached the assigned position when straightening through eyepiece 11 observation probe rod, the probe rod does not reach the appointed region of polishing after the bending, and the polishing effect of blade when polishing head 6 polishes, be convenient for in time make position and work adjustment, it still can include the function of shooing and photography, and be connected with the display through the data line, be convenient for observe and save data. An operating handle 16 is arranged below the control box 1, so that the control box is convenient for an operator to hold. The pneumatic system comprises an air source and an air pipe 13 which are connected with each other, one end of the air pipe 13 is arranged at the joint of the control box 1 and the thin-wall pipe 2, and the other end of the air pipe passes through the operating handle 16 to be connected with the air source. The shape memory alloy is adopted for the memory alloy tube 3, and preferably, the memory alloy tube 3 is made of zinc-gold-copper memory alloy. The direct current power supply 14 is provided with a power switch which is arranged outside the control box 1, and the operation is convenient
The invention adopts the working principle of a memory alloy pipe 3:
the memory alloy tube 3 is made of shape memory alloy with two-way memory property, and the memory alloy tube 3 is made of material which has shape memory effect through thermal elasticity, martensite phase transformation and inversion thereof and is composed of more than two metal elements. In this embodiment, the memory alloy tube 3 is made of zinc-gold-copper memory alloy, and because more and more low-temperature phase (martensite) crystal structures can appear in the high-temperature phase (austenite) of metal, the alloy can be broken due to incomplete conversion between the two phases, but the deformation frequency of the zinc-gold-copper memory alloy can reach ten million times without breaking, and the service life of the polishing instrument can be prolonged. The invention realizes the bending of the probe rod by utilizing the characteristic that a two-way memory alloy tube 3 in the prior art can change shape at a specific temperature, trains the memory alloy tube 3 by the method in the prior art, designs the bending angle and the deformation temperature of the memory alloy in advance, applies the memory characteristic of the memory alloy tube 3 that is in a bending state at normal temperature, changes the temperature of the memory alloy tube 3 by heating the electric heating wire 4 attached to the inner walls of the memory alloy tube 3 and the thin-wall tube 2, when the temperature is increased to 45 ℃, the memory alloy tube 3 begins to change to a straightening state, when the temperature reaches more than 50 ℃, the memory alloy tube 3 is completely changed to the straightening state, at the moment, the polisher is extended into the engine through an observation port of the engine, when the surface temperature of the memory alloy tube 3 is recovered to the normal temperature, the memory alloy tube 3 is bent again, at the moment, the grinding head 6 can reach the designated grinding area to finish the in-situ grinding of the blade.
As shown in fig. 2 and 3, the base 8 is a cylindrical structure with a stepped hole therein, and is provided with a bearing 10, the bearing 10 is a one-way bearing 10, when the sander is in a working state and an air source needs to be immediately closed, the sanding head 6 cannot be reversed due to the one-way rotation of the bearing 10, and the base 8 is in clearance fit with the bearing 10. The shoulder of the axle 17 is located inside the base 8 and abuts the bearing 10, and the axle 17 is interference fitted with the bearing 10. The shape of the impeller 7 is the same as that of the impeller 7 of the Savonius wind turbine, the number of the blades is 6, the inclination angle of the blades is 80 degrees, and the pneumatic performance of the impeller 7 is optimal.
In this embodiment, the ear 15 of the base 8 is fixedly connected to the end of the probe rod. The hub 17 of the impeller 7 is threadedly connected to the polishing head 6 through the base 8 and the bearing 10, while the polishing head 6 is in contact with the bearing 10 to press the bearing 10 to prevent axial play of the impeller 7. The wind shield 9 is in a semicircular sheet structure and is welded and connected with the lug part 15 of the base 8, so that the gas flow field environment around the impeller 7 can be improved, and the wind energy utilization rate of the impeller 7 is improved.
The working process of the semi-closed pneumatic endoscopic grinding instrument comprises the following steps:
turning on a power switch on the operation box to heat the electric heating wire 4, when the temperature of the electric heating wire 4 is raised to be more than 50 ℃, memorizing the shape of the alloy tube 3 to be in a straight state, and at the moment, extending the polishing instrument into the engine through an engine observation port;
turning off a power switch of the electric heating wire 4, reducing the temperature of the electric heating wire 4 to enable the memory alloy tube 3 to recover to be bent, and enabling the polishing head 6 to reach a specified polishing area;
the gas source is opened, gas blows the impeller 7 through the gas pipe 13, a semi-enclosed closed loop is formed between the impeller 7 and the windshield 9, the air pressure in the gas pipe 13 acts on the impeller 7 through the gas pipe 13, the impeller 7 drives the polishing head 6 to rotate at a high speed, and the windshield 9 improves the gas flow field around the impeller 7 so that the polishing head 6 can generate enough torque to polish the engine blades in situ.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A semi-closed pneumatic endoscopic grinding instrument is characterized by comprising a control box, a probe rod, a semi-closed driving structure, an endoscope observation system for observing the work of the grinding instrument and a pneumatic system for driving a grinding head to rotate, wherein the control box, the probe rod and the semi-closed driving structure are sequentially connected;
the probe rod comprises a thin-wall tube, a memory alloy tube and an electric heating wire, the thin-wall tube is fixedly connected with the memory alloy tube, the electric heating wire is arranged inside the thin-wall tube and the memory alloy tube and is fixedly connected with the memory alloy tube, and one end of the electric heating wire is connected with a direct current power supply inside the control box;
the semi-closed driving structure comprises a base, an impeller and a polishing head; the wheel shaft of the impeller penetrates through the base to be connected with the polishing head, the base is provided with a windshield of a semicircular structure, and the position of the impeller corresponds to the position of the windshield.
2. The semi-enclosed pneumatic endoscopic sander according to claim 1, wherein the endoscopic vision system is a flexible endoscope having an objective lens disposed at an end of the memory alloy tube near the semi-enclosed drive structure and an eyepiece lens disposed outside the control box.
3. The semi-enclosed pneumatic endoscopic sander according to claim 1, wherein an operating handle is provided below the control box.
4. The semi-enclosed pneumatic endoscopic sander according to claim 3, wherein the pneumatic system comprises a gas source and a gas pipe connected to each other, one end of the gas pipe is disposed at the connection of the control box and the thin-walled tube, and the other end of the gas pipe is connected to the gas source through the operating handle.
5. The semi-enclosed pneumatic endoscopic sander according to claim 1, wherein the memory alloy tube is made of shape memory alloy, preferably zinc-gold-copper memory alloy.
6. The semi-enclosed pneumatic endoscopic sander according to claim 1, wherein the dc power supply is provided with a power switch, said power switch being provided outside the control box.
7. The semi-enclosed pneumatic endoscopic sander according to claim 1, wherein the base is a cylindrical structure with a stepped bore therein, provided with a bearing, the bearing being a one-way bearing.
8. The semi-enclosed pneumatic endoscopic sander of claim 7, wherein the shoulder of the axle is located inside the base and rests on the bearing, and the axle is an interference fit with the bearing.
9. The semi-enclosed pneumatic endoscopic sander according to claim 1, wherein the position of said impeller in correspondence with said damper means in particular: the wind shield is positioned on the side surface of the impeller and is used for improving the gas flow field around the impeller when gas blows the impeller.
10. The semi-enclosed pneumatic endoscopic sander according to claim 1, wherein the impeller has the same shape as an impeller of a savonius wind turbine, and the number of blades is 6, and the blade angle is 80 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010392571.XA CN111546200A (en) | 2020-05-11 | 2020-05-11 | Semi-closed pneumatic endoscopic polishing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010392571.XA CN111546200A (en) | 2020-05-11 | 2020-05-11 | Semi-closed pneumatic endoscopic polishing instrument |
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| CN111546200A true CN111546200A (en) | 2020-08-18 |
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| CN202010392571.XA Pending CN111546200A (en) | 2020-05-11 | 2020-05-11 | Semi-closed pneumatic endoscopic polishing instrument |
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| JP2004358107A (en) * | 2003-06-09 | 2004-12-24 | Fibertech Co Ltd | Endoscope |
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Application publication date: 20200818 |
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