A high-pressure inlet guide vane

Abstract

The present invention relates to a high-pressure air inlet guide applied to the technical field related to compressors. Through the setting of a passive compensation unit and an active compensation unit, firstly, the wear point can be expanded outwards, thereby reducing the wear degree at the connection between the cam and the driving main shaft. At the same time, when the wear amount accumulates to a certain extent, the wear monitoring unit will be triggered to give a fixed-point warning of wear. Meanwhile, according to the wear situation, compensation can be carried out on the worn side, so as to effectively eliminate the influence of wear on the regulation of the air intake volume. Compared with the prior art, on the one hand, it can realize real-time monitoring of the wear state and carry out a certain amount of wear compensation. On the other hand, it can give an early warning during wear, which is convenient for timely maintenance, thereby greatly reducing the influence of deviation wear on the air intake flow and effectively ensuring the regulation accuracy of the air intake volume.

Description

Technical Field

[0001] A high-pressure air inlet guide vane of the present invention relates to, in particular, a high-pressure air inlet guide vane applied to the technical field related to compressors. Background Art

[0002] The specification of Chinese Patent CN116146536B discloses a flow regulating device and a centrifugal compressor, and the specification of Chinese Patent CN105020160A discloses a high-efficiency flow regulating device for a compressor. In the contents disclosed in these two patents, in both cases, blades with rotatable control angles are provided on the air inlet passage to regulate the magnitude of the air inlet flow. However, this method has the following problems: the blades are in an inclined state, and the gas pressure during air inlet does not fall vertically on the blades but forms a certain inclination angle with them, resulting in a certain deflection force on the blades. As a result, there is deflection wear between the shaft body connected to the blades and the drive shaft.

[0003] When deflection wear occurs, the shaft body controlling the rotation of the blades is also prone to being affected by the deflection force and wearing, resulting in the adjustment structure being prone to jamming. Seriously, it will affect the accuracy of the compressor control system in adjusting the rotation angle of the blades. In the prior art, generally, the wear is eliminated by regularly maintaining and replacing parts to maintain the accuracy of the flow regulation process. However, when relatively serious wear occurs during the interval between two maintenance adjustments, it cannot be adjusted in time, resulting in a still relatively large impact on the control accuracy of the air inlet flow of the compressor. Summary of the Invention

[0004] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is that the blades for regulating the flow are always inclined, which easily causes deflection wear of the shaft body, affects the accuracy of the adjustment device in adjusting the blade angle, and affects the accuracy of the compressor air inlet flow control.

[0005] To solve the above problems, the present invention provides a high-pressure air inlet guide vane, which includes an outer sleeve ring and an outer sleeve barrel fixedly connected to each other by bolts. A connecting plate is fixedly connected to the upper ends of the outer sleeve ring and the outer sleeve barrel. A guiding unit is provided inside the outer sleeve barrel. The guiding unit includes a left base ring, a right base ring fixedly connected to the left base ring by bolts, a plurality of linkage adjustment units, and a plurality of variable-direction vanes respectively connected to the ends of the linkage adjustment units. The middle part of the upper end of the outer sleeve barrel is movably penetrated by a driving main shaft. The lower end of the driving main shaft movably penetrates the connection between the left base ring and the right base ring and is fixedly connected to one of the linkage adjustment units. A follower ring is sleeved outside the right base ring. One end of the follower ring away from the linkage adjustment unit is threadedly connected with a plurality of positioning rods distributed in a circular array. A guide wheel is movably connected to the positioning rod. An annular guide groove is also dug outside the right base ring. A plurality of guide wheels are all embedded in the annular guide groove and are slidably connected with the annular guide groove;

[0006] The deflecting vane includes a driven swing rod movably inserted at the connection of the left base ring and the right base ring, and a blade fixedly connected to one end of the driven swing rod close to the axis of the left base ring. A plurality of blades are all located inside the inner ring of the left base ring. The linkage adjustment unit includes a cam fixedly connected to the end of the driven swing rod away from the blade, two ball head bearings respectively connected to the follower ring and the cam, and a connecting rod fixedly connected between the two ball head bearings. The lower end of the driving main shaft is inserted into the upper end of the corresponding cam. Through holes corresponding to each other are drilled on both the cam and the driving main shaft, and a positioning pin is inserted into the through holes of both. Passive compensation units and active compensation units are respectively arranged at the left and right ends of the cam, and both ends of the positioning pin respectively extend between the passive compensation unit and the active compensation unit.

[0007] In the above high-pressure air inlet guide, through the arrangement of the passive compensation unit and the active compensation unit, on the one hand, the wear state can be monitored in real time and a certain amount of wear compensation can be carried out. On the other hand, early warning can be given during wear, which is convenient for timely maintenance, thus greatly reducing the influence of deviation wear on the air inlet flow rate and effectively ensuring the regulation accuracy of the air inlet volume.

[0008] As a further improvement of the present application, both ends of the cam are semi-circular, and the diameters of the two semi-circles are different. The driving main shaft is coaxial with the large-diameter semi-circle of the cam, and the connecting rod is coaxial with the small-diameter semi-circle.

[0009] As a further improvement of the present application, both the passive compensation unit and the active compensation unit include two symmetrically arranged compensation flaps. The compensation flap includes a positioning seat fixedly connected to the cam, a back plate fixedly connected to the end of the positioning seat away from the cam, and a compensation sleeve fixedly connected to a section of the back plate close to the positioning pin. An embedded groove is drilled inside the compensation sleeve, a compensation rod is installed on the inner wall of the embedded groove close to the positioning pin, and both compensation sleeves are close to the positioning pin but do not contact the positioning pin.

[0010] As a further improvement of the present application, the compensation rod on the passive compensation unit is coaxially arranged with the compensation sleeve, and the compensation rod on the active compensation unit is eccentrically arranged with the compensation sleeve.

[0011] As a further improvement of the present application, two wear monitoring units are also connected to the two compensation flaps on the active compensation unit. The two wear monitoring units include an audible and visual alarm installed at the end of the back plate away from the compensation sleeve, and a touch plate connected to the end of the compensation sleeve close to the positioning pin. The touch plate is in series with the circuit where the audible and visual alarm is located. A wire is also in series with the circuit where the audible and visual alarm is located, and the wire is embedded inside the positioning pin. The end of the wire penetrates through the positioning pin and extends to the surface of the positioning pin, and the end of the wire corresponds to the touch plate.

[0012] As a further improvement of the present application, the compensation rod includes an electric push rod, a pressure sensor fixedly installed on the extended end of the electric push rod, and a compensation section fixedly connected to the sensing end of the pressure sensor. The four compensation sections are all in contact with the positioning pins, and the pressure data of the multiple pressure sensors are consistent.

[0013] As another improvement of the present application, an induction groove is dug in the middle of the compensation section. An induction rod is fixedly connected in the induction groove. The induction rod includes an elastic section fixedly connected to the inner bottom wall of the induction groove and a hard section fixedly connected to the upper end of the elastic section. The end of the hard section is flush with the surface of the compensation section. The compensation section is made of a hard material, and the hardness of the compensation section is lower than that of the positioning pin.

[0014] As a supplement to another improvement of the present application, an internal detection cavity is dug in the top of the hard section. Translucent holes are also dug in the outer end of the top of the hard section and are evenly distributed in a spiral. A transparent sheet is connected to the orifice of the translucent hole. A light intensity sensor is installed at the top of the internal detection cavity, and the light intensity sensor is higher than the multiple translucent holes.

[0015] In summary, through the setting of the passive compensation unit and the active compensation unit, first, the wear point can be expanded outwards, thereby reducing the wear degree at the connection between the cam and the driving main shaft. At the same time, when the wear amount accumulates to a certain extent, the wear monitoring unit will be triggered, thereby warning of wear at a fixed point. At the same time, according to the wear situation, compensation can be carried out on the worn side, so as to effectively eliminate the influence of wear on the intake air volume regulation. Compared with the prior art, on the one hand, the wear state can be monitored in real time and a certain amount of wear compensation can be carried out. On the other hand, early warning can be given during wear, which is convenient for timely maintenance, thereby greatly reducing the influence of deviation wear on the intake air flow and effectively ensuring the regulation accuracy of the intake air volume. Brief Description of the Drawings

[0016] Figure 1 is a three-dimensional view of the first embodiment of the present application;

[0017] Figure 2 is a three-dimensional view of the left side view of the internal guiding unit of the first embodiment of the present application;

[0018] Figure 3 is an exploded view of the first embodiment of the present application;

[0019] Figure 4 is a three-dimensional view of a part of the multiple linkage adjustment units of the first embodiment of the present application;

[0020] Figure 5 is a three-dimensional view of the right side view of the internal guiding unit of the first embodiment of the present application;

[0021] Figure 6 is an analysis schematic diagram of the wear point of the first embodiment of the present application;

[0022] Figure 7 Schematic diagram of a passive compensation unit and an active compensation unit arranged outside a cam according to the first embodiment of the present application;

[0023] Figure 8 Stereogram of the cam part according to the first embodiment of the present application;

[0024] Figure 9 Top view schematic diagram of the active compensation unit according to the first embodiment of the present application;

[0025] Figure 10 Top view schematic diagram of the passive compensation unit according to the first embodiment of the present application;

[0026] Figure 11 Schematic diagram of the compensation rod according to the first embodiment of the present application;

[0027] Figure 12 Schematic diagram of the cross-section of the compensation section according to the second embodiment of the present application;

[0028] Figure 13 Comparison schematic diagram of the compensation section after being worn, during the operation and when the compressor stops operating according to the second embodiment of the present application;

[0029] Figure 14 Front view cross-section schematic diagram of the induction rod according to the second embodiment of the present application;

[0030] Figure 15 Radial cross-section schematic diagram of the induction rod according to the second embodiment of the present application;

[0031] Explanation of the reference numerals in the figure:

[0032] 11 Outer sleeve ring, 12 Outer sleeve, 13 Connecting plate, 2 Driving main shaft, 3 Guide unit, 31 Left base ring, 32 Right base ring, 301 Annular guide groove, 302 Guide wheel, 303 Positioning rod, 4 Linkage adjustment unit, 41 Cam, 42 Ball head bearing, 43 Connecting rod, 401 Positioning pin, 5 Follow-up ring, 61 Driven swing rod, 62 Blade, 7 Compensation flap, 71 Positioning seat, 72 Back plate, 73 Compensation sleeve, 701 Point contact piece, 8 Acousto-optic alarm, 9 Compensation rod, 91 Electric push rod, 92 Pressure sensor, 93 Compensation section, 101 Hard section, 102 Elastic section, 141 Light intensity sensor, 142 Transparent sheet, 143 Light transmission hole. Specific embodiments

[0033] The following will make a detailed description of the two embodiments of the present application with reference to the accompanying drawings.

[0034] First embodiment:

[0035] Figure 1-4There is shown a high-pressure inlet guide, which includes an outer sleeve ring 11 and an outer sleeve 12 fixedly connected to each other by bolts. A connecting plate 13 is fixedly connected to the upper ends of the outer sleeve ring 11 and the outer sleeve 12. A guiding unit 3 is arranged inside the outer sleeve 12. The guiding unit 3 includes a left base ring 31, a right base ring 32 fixedly connected to the left base ring 31 by bolts, a plurality of linkage adjustment units 4, and a plurality of turning vanes respectively connected to the ends of the linkage adjustment units 4. The turning vane includes a driven swing rod 61 movably embedded at the connection of the left base ring 31 and the right base ring 32, and a blade 62 fixedly connected to one end of the driven swing rod 61 close to the axis of the left base ring 31. A plurality of blades 62 are all located inside the inner ring of the left base ring 31. A driving main shaft 2 movably penetrates through the middle of the upper end of the outer sleeve 12. The lower end of the driving main shaft 2 movably penetrates through the connection of the left base ring 31 and the right base ring 32 and is fixedly connected to one of the linkage adjustment units 4. A follower ring 5 is sleeved outside the right base ring 32. When it is necessary to adjust the intake air volume of the compressor, the control unit of the compressor controls the motor that drives the driving main shaft 2 to rotate, so that the linkage adjustment unit 4 directly connected to the driving main shaft 2 is driven, and then drives the follower ring 5 to rotate. Then, a plurality of linkage adjustment units 4 all swing accordingly, so that a plurality of turning vanes connected to the plurality of linkage adjustment units 4 all rotate. Thus, the driving main shaft 2 synchronously adjusts the angles of a plurality of blades 62 to achieve the adjustment of the intake air volume, such as Figure 5 , one end of the follower ring 5 away from the linkage adjustment unit 4 is threadedly connected with a plurality of positioning rods 303 distributed in an annular array. A guide wheel 302 is movably connected to the positioning rod 303. An annular guide groove 301 is also drilled outside the right base ring 32. A plurality of guide wheels 302 are all embedded in the annular guide groove 301 and are slidably connected to the annular guide groove 301. During the process of the follower ring 5 being driven to rotate, a plurality of guide wheels 302 rotate along the annular guide groove 301 accordingly. Thus, the rotation of the follower ring 5 can be guided, making it not easy to move axially along the right base ring 32. At the same time, the friction between the follower ring 5 and the right base ring 32 is converted into rolling friction, effectively reducing the friction force. Thus, the flexibility and stability of the driving main shaft 2 when adjusting the angle of the blade 62 can be improved.

[0036] Such as Figure 4 , the linkage adjustment unit 4 includes a cam 41 fixedly connected to one end of the driven swing rod 61 away from the blade 62, two ball head bearings 42 respectively connected to the follower ring 5 and the cam 41, and a connecting rod 43 fixedly connected between the two ball head bearings 42. The lower end of the driving main shaft 2 is inserted into the upper end of the corresponding cam 41. Through holes corresponding to each other are drilled on both the cam 41 and the driving main shaft 2, and a positioning pin 401 is commonly inserted into the through holes on both of them, such as Figure 6-7A passive compensation unit and an active compensation unit are respectively provided at the left and right ends of the cam 41, and the two ends of the positioning pin 401 extend between the passive compensation unit and the active compensation unit respectively. The passive compensation unit and the active compensation unit each include two symmetrical compensation petals 7, and the compensation petal 7 includes a positioning seat 71 fixedly connected to the cam 41, a back plate 72 fixedly connected to the end of the positioning seat 71 away from the cam 41, and a compensation sleeve 73 fixedly connected to a section of the back plate 72 close to the positioning pin 401. An embedded groove is bored inside the compensation sleeve 73, and a compensation rod 9 is installed on the inner wall of the embedded groove close to the positioning pin 401. Both compensation sleeves 73 are close to the positioning pin 401 but do not contact the positioning pin 401. When in use, the compensation rods 9 of the passive compensation unit and the active compensation unit can be controlled to extend and align with the positioning pin 401. The positioning pin 401 is in conflict with the compensation rod 9, and the pressure data generated by the multiple pressure sensors 92 are kept consistent, so that the positioning pin 401 is in a balanced state, and through the setting of the passive compensation unit and the active compensation unit, the positioning pin 401 conflicts with the compensation rod 9 during use, so that the wear points of the positioning pin 401, the cam 41 and the inner hole wall of the driving spindle 2 expand outward and extend to the connection between the compensation rod 9 and the positioning pin 401, making this place more prone to wear, thereby effectively alleviating the wear of the cam 41 and the driving spindle 2, increasing the service life, and reducing the frequency of disassembling and replacing each part in the later stage.

[0037] like Figure 9-10 The compensation rod 9 on the passive compensation unit is coaxially arranged with the compensation sleeve 73, and the compensation rod 9 on the active compensation unit is eccentrically arranged with the compensation sleeve 73. Since the passive compensation unit is not provided with a wear monitoring unit and only provided with the compensation rod 9, the compensation rod 9 is coaxial with the compensation sleeve 73.

[0038] like Figure 11 The compensation rod 9 includes an electric push rod 91, a pressure sensor 92 fixedly installed on the extended end of the electric push rod 91, and a compensation section 93 fixedly connected to the sensing end of the pressure sensor 92. The four compensation sections 93 are in conflict with the positioning pin 401, and the pressure data of multiple pressure sensors 92 are consistent. The compensation section 93 is made of hard material, and the hardness of the compensation section 93 is lower than the hardness of the positioning pin 401. When wear occurs under the action of the deflection force, the compensation section 93 will wear first, so that the two pressure sensors 92 can produce obvious data differences more quickly, and one of the pressure sensors 92 will tend to become smaller, so that it is convenient for staff to judge the wear condition. When the wear accumulates to a certain extent, it is convenient for the contact piece 701 to contact the end of the wire, thereby triggering an alarm.

[0039] The two compensation petals 7 on the active compensation unit are also connected to two wear monitoring units, which include an audible and visual alarm 8 installed on the end of the back plate 72 away from the compensation sleeve 73, and a contact piece 701 connected to the end of the compensation sleeve 73 close to the positioning pin 401. The contact piece 701 is connected in series with the circuit where the audible and visual alarm 8 is located. A wire is also connected in series to the circuit where the audible and visual alarm 8 is located, and the wire is embedded in the positioning pin 401. The end of the wire passes through the positioning pin 401 and extends to the surface of the positioning pin 401, and the end of the wire corresponds to the contact piece 701. When the compressor is working, due to the deflection force, the data of the two pressure sensors 92 in the active compensation unit will increase and decrease respectively. The data of the two pressure sensors 92 in the passive compensation unit will change in the same way, and the two pressure sensors 92 with increased data are angled relative to each other, and even the data of one of the pressure sensors 92 disappears. The size of the deflection force can be effectively judged based on the data difference. As the use time increases, the wear degree will gradually increase. Figure 7 Under the action of the deflection force, the positioning pin 401 will be deflected to the worn side, gradually conflicting with the contact piece 701, and then the end of the wire will overlap with the contact piece 701, so that the sound and light alarm 8 is turned on and the alarm is triggered, which is convenient for timely maintenance. At the same time, after the alarm is triggered, the two compensation rods 9 of the big data can be controlled to extend, and then push the positioning pin 401 from both ends, thereby eliminating the slight imbalance due to wear and achieving the effect of wear compensation, until the two pressure sensors 92 whose data disappears generate force data.

[0040] The second implementation method:

[0041] Based on the first embodiment, this embodiment adds a sensing rod and related structures, and the rest of the parts are consistent with the first embodiment.

[0042] Figure 12 As shown, a sensing groove is excavated in the middle of the compensation section 93, and a sensing rod is fixedly connected in the sensing groove. The sensing rod includes an elastic section 102 fixedly connected to the bottom wall of the sensing groove and a hard section 101 fixedly connected to the upper end of the elastic section 102. The end of the hard section 101 is flush with the surface of the compensation section 93, and an inner detection cavity is excavated in the top of the hard section 101. Figure 14-15 The outer end of the top of the hard section 101 is also drilled with light holes 143 evenly distributed in a spiral shape, the mouth of the light holes 143 is connected to the outer sleeve transparent sheet 142, and the top of the inner detection cavity is installed with a light intensity sensor 141, which is higher than the multiple light holes 143. Figure 13, when the compensation section 93 is slightly worn, when the fan is not working, without the resistance of the biasing force, the elastic section 102 will recover its deformation, and then the end of the rigid section 101 can extend outside the compensation section 93, so that the orifice of the light-transmitting hole 143 is exposed, and then light can pass through the light-transmitting hole 143, and then the light intensity sensor 141 can sense the light intensity. Therefore, when the fan is not working, the deviation wear can be judged in time. Moreover, the greater the wear degree, the more the number of light-transmitting holes 143 leaking out, and the greater the light intensity data obtained by the light intensity sensor 141. Based on the data change situation at the light-transmitting hole 143, the wear amplitude can be effectively judged. Compared with the first embodiment, in which the wear degree can only be judged when the fan is working, the wear monitoring effect of this embodiment is better. Precise compensation can be carried out in advance before the fan works, and the abnormal wear during the two regular maintenance time periods can be effectively compensated, making the adjustment of the intake air volume more accurate when the fan is working.

[0043] In summary, through the setting of the passive compensation unit and the active compensation unit, first, the wear point can be expanded outwards, and then the wear degree at the connection between the cam 41 and the driving main shaft 2 can be reduced. At the same time, when the wear amount accumulates to a certain extent, the wear monitoring unit will be triggered to warn of the wear at a fixed point. At the same time, according to the wear situation, compensation can be carried out on the worn side, so as to effectively eliminate the influence of wear on the intake air volume regulation. Compared with the prior art, on the one hand, the wear state can be monitored in real time and a certain amount of wear compensation can be carried out. On the other hand, an early warning can be given in advance during wear, which is convenient for timely maintenance, thus greatly reducing the influence of deviation wear on the intake air flow and effectively ensuring the regulation accuracy of the intake air volume.

[0044] Combined with the current actual requirements, the above-mentioned implementation manner adopted in this application, the protection scope is not limited to this. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A high-pressure air intake guide, characterized in that: It comprises an outer ring and an outer sleeve which are fixedly connected to each other by bolts, the upper ends of the outer ring and the outer sleeve are fixedly connected with a connecting plate, a guide unit is arranged in the outer sleeve, the guide unit comprises a left base ring, a right base ring fixed to the left base ring by bolts, a plurality of linkage adjustment units and a plurality of direction-changing blades respectively connected to the ends of the linkage adjustment units, a driving main shaft is movably penetrated in the middle of the upper end of the outer sleeve, the lower end of the driving main shaft is movably penetrated through the connection between the left base ring and the right base ring and is fixedly connected to one of the linkage adjustment units, a follower ring is arranged on the outer sleeve of the right base ring, a plurality of positioning rods distributed in an annular array are threadedly connected to the end of the follower ring away from the linkage adjustment unit, a guide wheel is movably connected to the positioning rod, an annular guide groove is also excavated outside the right base ring, and a plurality of guide wheels are all embedded in the annular guide groove and are slidably connected to the annular guide groove; The direction-changing blade includes a driven rocker arm movably embedded in the connection between the left base ring and the right base ring, and a blade fixedly connected to the driven rocker arm at one end close to the axis of the left base ring, and a plurality of the blades are located in the inner ring of the left base ring. The linkage adjustment unit includes a cam fixedly connected to the end of the driven rocker arm away from the blade, two ball bearings respectively connected to the follower ring and the cam, and a connecting rod fixedly connected between the two ball bearings. The lower end of the driving main shaft is inserted into the upper end of the corresponding cam. The cam and the driving main shaft are both provided with corresponding through holes, and positioning pins are inserted into the through holes of the two. Passive compensation units and active compensation units are respectively provided at the left and right ends of the cam, and the two ends of the positioning pin extend between the passive compensation unit and the active compensation unit respectively.

2. A high pressure air intake guide according to claim 1, characterized in that: Both ends of the cam are semicircular, and the diameters of the two semicircles are different. The driving spindle is coaxial with the large-diameter semicircle of the cam, and the connecting rod is coaxial with the small-diameter semicircle.

3. A high pressure air intake guide according to claim 1, characterized in that: The passive compensation unit and the active compensation unit both include two symmetrical compensation petals, each of which includes a positioning seat fixedly connected to the cam, a back plate fixedly connected to an end of the positioning seat away from the cam, and a compensation sleeve fixedly connected to a section of the back plate near the positioning pin, an embedded groove is bored inside the compensation sleeve, a compensation rod is installed on the inner wall of the embedded groove near the positioning pin, and both of the compensation sleeves are close to the positioning pin but do not contact the positioning pin.

4. A high-pressure air intake guide according to claim 3, characterized in that: The compensation rod and the compensation sleeve on the passive compensation unit are coaxially arranged, and the compensation rod and the compensation sleeve on the active compensation unit are eccentrically arranged.

5. A high pressure air intake guide according to claim 4, characterized in that: The two compensation petals on the active compensation unit are also connected to two wear monitoring units, and the two wear monitoring units include an audible and visual alarm installed on the end of the back plate away from the compensation sleeve, and a contact piece connected to the end of the compensation sleeve close to the positioning pin. The contact piece is connected in series with the circuit where the audible and visual alarm is located. A wire is also connected in series with the circuit where the audible and visual alarm is located, and the wire is embedded in the positioning pin. The end of the wire passes through the positioning pin and extends to the surface of the positioning pin, and the end of the wire corresponds to the contact piece.

6. A high-pressure air intake guide according to claim 5, characterized in that: The compensation rod includes an electric push rod, a pressure sensor fixedly installed on the extended end of the electric push rod, and a compensation section fixedly connected to the sensing end of the pressure sensor. The four compensation sections all conflict with the positioning pins, and the pressure data of multiple pressure sensors remain consistent.

7. A high pressure air intake guide according to claim 6, characterized in that: A sensing groove is bored in the middle of the compensation section, a sensing rod is fixedly connected in the sensing groove, the sensing rod comprises an elastic section fixedly connected to the bottom wall of the sensing groove and a hard section fixedly connected to the upper end of the elastic section, the end of the hard section is flush with the surface of the compensation section, the compensation section is made of hard material, and the hardness of the compensation section is lower than the hardness of the positioning pin.

8. A high pressure air intake guide according to claim 7, characterized in that: An inner detection cavity is bored in the top of the hard segment, and light-transmitting holes evenly distributed in a spiral are bored at the outer end of the top of the hard segment. A transparent sheet is connected to the mouth of the light-transmitting hole. A light intensity sensor is installed on the top of the inner detection cavity, and the light intensity sensor is higher than the multiple light-transmitting holes.

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