CN111336127A

CN111336127A - Reversing fan

Info

Publication number: CN111336127A
Application number: CN202010266697.2A
Authority: CN
Inventors: 陶晶; 丁晚景; 王爱春
Original assignee: Hubei Polytechnic University
Current assignee: Hubei Polytechnic University
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-06-26

Abstract

The invention discloses a reversing fan, comprising: the fan drum is of a hollow columnar structure, and a plurality of through holes are formed in the side periphery of the fan drum at equal intervals; the tail ends of the blades are connected with the fan drum through a gear shaft penetrating through the through hole, and the gear shaft is composed of a shaft lever and a gear; the base of the hydraulic cylinder is fixed with the fan drum and penetrates through the fan drum, the telescopic end of the hydraulic cylinder is connected with a plurality of racks, and the racks are meshed with the gear; the oil inlet nozzle is connected with the hydraulic cylinder; the oil inlet nozzle comprises: the oil inlet pipe is hollow, and a first oil inlet pore channel is arranged at the upper part of the oil inlet pipe; the pipe joint is internally provided with a second oil inlet duct; the upper part of the pipe joint penetrates into the oil inlet pipe and is installed in the oil inlet pipe through a bearing, and the second oil inlet pore passage is communicated with the first oil inlet pore passage through a rotary joint. The invention can suck the stem leaves of the crops out of the engine bin through the fan, thereby solving the problem that the crops are attached to the surface of the engine.

Description

Reversing fan

Technical Field

The invention relates to the field of agricultural equipment. More particularly, the present invention relates to a reversing fan.

Background

When the traditional agricultural harvesting machinery such as rice, corn, wheat harvesters and the like is used due to environmental reasons, when the equipment works, stems and leaves of harvested crops are cut off and sucked into an engine bin by an engine cooling fan along with the advance of the equipment and attached to the surface of an engine. Stem leaves that are attached to the engine surface based on crops need in time to be cleared up, and if adopt the mode of manual cleaning, the engine must be shut down, simultaneously because the cabin space is narrow and small, the manual cleaning degree of difficulty is big, and is inefficient, can seriously reduce agricultural harvesting machine's operating efficiency.

Disclosure of Invention

The invention aims to provide a reversing fan which can suck stems and leaves of crops out of an engine bin through the fan, and solves the technical problem.

To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a reversing fan comprising:

the fan drum is of a hollow columnar structure, and a plurality of through holes are formed in the side periphery of the fan drum at equal intervals;

the tail ends of the blades are connected with the fan drum through a gear shaft penetrating through the through hole, and the gear shaft is composed of a shaft lever and a gear;

the base of the hydraulic cylinder is fixed with the fan drum and penetrates through the fan drum, the telescopic end of the hydraulic cylinder is connected with a plurality of racks, and the racks are meshed with the gear;

the oil inlet nozzle is connected with the hydraulic cylinder; the oil inlet nozzle comprises: the oil inlet pipe is hollow, and a first oil inlet pore channel is arranged at the upper part of the oil inlet pipe; the pipe joint is internally provided with a second oil inlet duct; the upper part of the pipe joint penetrates into the oil inlet pipe and is installed in the oil inlet pipe through a bearing, and the second oil inlet pore passage is communicated with the first oil inlet pore passage through a rotary joint.

Preferably, the inner wall of the oil inlet pipe relative to the rotary joint is of a first step-shaped structure, a transition sleeve is fixed on the outer shell of the rotary joint, and the transition sleeve is fixed with the first step-shaped structure of the rotary joint through a rolling pin;

the first oil inlet duct is composed of a first small-aperture oil duct and a first large-aperture oil duct from top to bottom, and the upper part of the rotary joint shell is hermetically connected with the inner wall of the first large-aperture oil duct; and a compressed first spring is arranged in a space between the first large-aperture oil passage and the top of the rotary joint, so that the top of the rotary joint is stressed vertically downwards.

Preferably, the upper part of the rotary joint housing is hermetically connected with the inner wall of the first large-aperture oil passage through a first sealing ring; and a second sealing ring is arranged on the outer wall of the oil inlet pipe.

Preferably, the upper part of the pipe joint is connected with the oil inlet pipe through a plurality of groups of bearings, and a bearing spacer is arranged between the bearings.

Preferably, the shell that the coupling and the bottom surface of the bearing of the bottom contacted is the second stepped structure, just be provided with first circlip between the outer wall of second stepped structure and the inner wall of advancing oil pipe, be provided with the second circlip between coupling and the top surface of the bearing of the top.

Preferably, the second oil inlet duct is composed of a second small-aperture oil passage and a second large-aperture oil passage perpendicular to the second small-aperture oil passage, which are vertically arranged from top to bottom.

Preferably, the blade further comprises a pair of balancing weights which are respectively positioned at the upper side and the lower side of the tail end of the blade and fixed through bolts and nuts, and the bolts vertically penetrate through the gear shaft;

and a thrust bearing is connected between the gear shaft and the fan drum.

Preferably, the telescopic end of the hydraulic cylinder is coaxially connected to one end of a second spring, and the other end of the second spring is connected with a top cover of the fan drum; the second spring is set to be in a compressed state when the telescopic end of the hydraulic cylinder extends out.

Preferably, the periphery of pneumatic cylinder is fixed with and passes through the lid, the inner circle that passes through the lid is hollow structure, and with the flexible coaxial setting of end of pneumatic cylinder, the inner circle interval that passes through the lid is provided with a plurality of first draw-in grooves, the periphery correspondence of the flexible end of pneumatic cylinder is provided with a plurality of second draw-in grooves, first draw-in groove and second draw-in groove pass through the guide block joint to the flexible end of injecing the pneumatic cylinder is along its axial motion.

Preferably, the number of the blades is 5, and the blades are arranged on the side circumference of the fan drum at equal intervals.

The invention at least comprises the following beneficial effects: the invention designs the fan for cooling the engine, which can change the wind direction, the fan has the same function as the fan of the common engine when in normal work, when the stems and leaves of the crops are accumulated to a certain amount in the engine, the direction of the fan is controlled to be changed by the hydraulic reversing switch, the blowing is changed into the suction, the stems and leaves of the crops are sucked out of the engine bin through the fan, and the problem that the crops are attached to the surface of the engine is solved. The method specifically comprises the following steps:

1. compared with a common engine cooling fan, the fan has the advantages that the deflection angle of the fan blades can be adjusted, and the air output in the positive direction and the negative direction of the fan can be realized.

2. The inside of the cylinder body is driven by a gear rack, the transmission is stable and reliable, the rotating speed and displacement of the fan blades and the axial movement speed and displacement of the cylinder body are in a linear relation, and under the condition of a certain input flow, the rotation of the fan blades is uniform, so that the reversing impact force of the fan blades can be reduced, the abrasion of parts is reduced, and the service life of the parts is prolonged.

3. This product has set up the guide block, makes the piston of pneumatic cylinder can only follow axial motion, has restricted the motion of circumferencial direction, and consequently the motion form of pneumatic cylinder piston is definite, can reduce flabellum pivoted vibration and noise.

4. The inside clearance that adopts the perpendicular to hydraulic oil flow direction of oil feed mouth is sealed, has solved the leak protection problem of the contact surface that has relative motion.

5. The two rotating limit positions of the fan blades are ensured by mechanical limit, and the precision is high and the reliability is good.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is an exploded view a of a reversing fan assembly of the present invention;

FIG. 2 is an exploded view b of the reversing fan assembly of the present invention;

FIG. 3 is a front view of the blade of the present invention;

FIG. 4 is an exploded view of the blade of the present invention;

FIG. 5 is a cross-sectional view of an oil inlet nozzle of the present invention;

FIG. 6 is an exploded view of the oil inlet nozzle of the present invention.

Description of reference numerals: 1 fan drum, 2 top cover, 3 rack, 4 guide block, 5 blades, 6 screws, 7 through cover, 8 oil inlet nozzle, 9 hydraulic cylinder, 10 second spring, 11 through hole, 12 first clamping groove, 13 second clamping groove, 14 balancing weight, 15 bolts, 16 nuts, 17 thrust bearing, 18 gear shaft, 19 gears, 20 oil inlet pipe, 21 pipe joint, 22 bearing, 23 rotary joint, 24 first stepped structure, 25 transition sleeve, 26 rolling pin, 27 first small-aperture oil passage, 28 first large-aperture oil passage, 29 first spring, 30 gasket, 31 first sealing ring, 32 second sealing ring, 33 bearing spacer, 34 second stepped structure, 35 first elastic retainer ring, 36 second elastic retainer ring, 37 second small-aperture oil passage and 38 second large-aperture oil passage.

Detailed Description

The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.

In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the 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.

As shown in fig. 1 to 6, the present invention provides a reversing fan, including:

the fan drum 1 is of a hollow columnar structure, and a plurality of through holes 11 are formed in the side periphery of the fan drum 1 at equal intervals;

a plurality of blades 5, the ends of which are connected with the fan drum 1 through a gear shaft 18 penetrating through the through hole 11, wherein the gear shaft 18 is composed of a shaft rod and a gear 19;

the base of the hydraulic cylinder 9 is fixed with the fan drum 1 and penetrates into the fan drum 1, the telescopic end of the hydraulic cylinder 9 is connected with a plurality of racks 3, and the racks 3 are meshed with the gear 19. In the embodiment, a single-acting hydraulic cylinder 9 is used for driving, and the telescopic end of the hydraulic cylinder 9 reciprocates to provide power for rotating and reversing the blades 5.

The oil inlet nozzle 8 is connected with the hydraulic cylinder 9; the oil inlet nozzle 8 comprises: the oil inlet pipe 20 is hollow, and a first oil inlet pore passage is arranged at the upper part of the oil inlet pipe 20; a pipe joint 21 having a second oil inlet channel therein; the upper portion of the pipe joint 21 penetrates into the oil inlet pipe 20 and is mounted in the oil inlet pipe 20 through a bearing 22, the second oil inlet hole channel is communicated with the first oil inlet hole channel through a rotary joint 23, and preferably, the rotary joint 23 adopts a gap sealing structure.

In the technical scheme, the fan blades installed in the fan drum 1 have the same function as a fan of a common engine during normal work, when a certain amount of crop stems and leaves are accumulated in the engine, the hydraulic cylinder 9 drives the rack 3 to move downwards, the rack 3 drives the gear 19 to rotate, the fan blades rotate to change blowing into air suction, and the stems and leaves of the crops are sucked out of the engine bin through the fan. The reciprocating motion of pneumatic cylinder 9 provides the power of blade 5 rotation switching-over, and the oil feed and the play oil of pneumatic cylinder 9 are the key, lie in the sector rotation and pneumatic cylinder 9 advance oil pipe 20 ways relatively fixed between the sealing, and this embodiment adopts the oil feed mouth 8 structure to guarantee that oil-tight and oil-through is smooth when the oil feed.

This application oil inlet nozzle 8's work flow: the hydraulic oil that enters the oil outlet circuit enters the second small-bore oil passage 37 through the second large-bore oil passage 38, and then enters and fills the first large-bore oil passage 28 and the first small-bore oil passage 27 through the rotary joint 23, and the first small-bore oil passage 27 finally enters the hydraulic cylinder 9. The oil inlet pipe 20 of the oil inlet nipple 81 is fixedly connected to the hydraulic cylinder 9, and when the hydraulic cylinder 9 rotates, the oil inlet pipe 20 of the oil inlet nipple 8 rotates in synchronization with the hydraulic cylinder 9, while the pipe joint 21 is kept relatively stationary due to the rotary joint 23 and the bearing 22.

In a preferred embodiment of the reversing fan of the present application, as shown in fig. 5 to 6, the inner wall of the oil inlet pipe 20 opposite to the rotary joint 23 is a first step structure 24, a transition sleeve 25 is fixed on the outer shell of the rotary joint 23, and the transition sleeve 25 is fixed with the first step structure 24 of the rotary joint 23 through a rolling pin 26, so that the outer shell of the rotary joint 23 is connected with the oil inlet pipe 20 as a whole.

The first oil inlet duct is composed of a first small-aperture oil passage 27 and a first large-aperture oil passage 28 from top to bottom, and the upper part of the outer shell of the rotary joint 23 is hermetically connected with the inner wall of the first large-aperture oil passage 28; the space between the first large-bore oil passage 28 and the top of the rotary joint 23 is provided with a compressed first spring 29 to subject the top of the rotary joint 23 to a vertically downward pressure, and it is preferable to provide a gasket 30 on the top of the rotary joint 23 such that the compressed first spring 29 is disposed between the first large-bore oil passage 28 and the gasket 30.

In the above technical solution, the first large-bore oil passage 28 can ensure smooth oil supply, and the compressed first spring 29 is disposed in the space between the first large-bore oil passage 28 and the top of the rotary joint 23, so that the first spring 29 applies a downward pressure to the rotary joint 23, thereby ensuring tight connection between the rotary joint 23 and the oil inlet pipe 20.

In a preferred embodiment of the reversing fan of the present application, the upper portion of the outer shell of the rotary joint 23 is connected to the inner wall of the first large-bore oil passage 28 in a sealing manner by the first sealing ring 31, so as to ensure the sealing performance between the outer shell of the rotary joint 23 and the first large-bore oil passage 28. The outer wall of the oil inlet pipe 20 is provided with a second sealing ring 32, so that the sealing performance of the hydraulic cylinder 9 when being connected with the oil inlet pipe 20 is ensured.

In a preferred embodiment of the reversing fan of the present application, the upper portion of the pipe joint 21 is connected to the oil inlet pipe 20 through a plurality of sets of bearings 22, and a bearing spacer 33 is disposed between the bearings 22, so as to reduce wear and improve the service life of the bearings 22.

In a preferred embodiment of the reversing fan of the present application, the housing of the pipe joint 21 contacting with the bottom surface of the lowermost bearing 22 is a second stepped structure 34, a first elastic retaining ring 35 is arranged between the outer wall of the second stepped structure 34 and the inner wall of the oil inlet pipe 20, and the bearing 22 is supported by the first elastic retaining ring 35 and the second stepped structure 34; a second elastic retainer ring 36 is arranged between the pipe joint 21 and the top surface of the uppermost bearing 22; the first elastic check ring 35 and the second elastic check ring 36 can reduce abrasion among components and prolong service life.

In a preferred embodiment of the reversing fan of the present application, the second oil inlet duct is formed by a second small-aperture oil passage 37 and a second large-aperture oil passage 38, which are vertically arranged from top to bottom, and are perpendicular to the second small-aperture oil passage 37.

In a preferred embodiment of the reversing fan of the present application, as shown in fig. 3 to 4, the reversing fan further includes a pair of weight blocks 14, which are respectively located at the upper and lower sides of the end of the blade 5 and fixed by bolts 15 and nuts 16, and the bolts 15 vertically penetrate through the gear shaft 18, so as to ensure the blowing and sucking effects of the fan blades. A thrust bearing 17 is connected between the gear shaft 18 and the fan drum 1.

In a preferred embodiment of the reversing fan of the present application, the telescopic end of the hydraulic cylinder 9 is coaxially connected to one end of a second spring 10, and the other end of the second spring 10 is connected to the top cover 2 of the fan drum 1; the second spring 10 is arranged such that when the telescopic end of the hydraulic cylinder 9 is extended, the second spring 10 is in a compressed state.

In a preferred embodiment of the reversing fan of this application, the periphery of pneumatic cylinder 9 is fixed with through lid 7, the inner circle of through lid 7 is hollow structure, and with the coaxial setting of the flexible end of pneumatic cylinder 9, the inner circle interval of through lid 7 is provided with a plurality of first draw-in grooves 12, the periphery correspondence of the flexible end of pneumatic cylinder 9 is provided with a plurality of second draw-in grooves 13, first draw-in groove 12 and second draw-in groove 13 pass through guide block 4 joint to the flexible end of injecing pneumatic cylinder 9 has restricted the motion of circumferencial direction along its axial motion, and consequently the motion form of pneumatic cylinder 9 piston is definite, can reduce 5 pivoted vibrations of blade and noise. The fan drum 1, the top cover 2 and the transparent cover 7 are fixed through screws 6.

In a preferred embodiment of the reversing fan of the present application, the number of the blades 5 is 5, and the blades are arranged on the side circumference of the fan drum 1 at equal intervals.

In the present embodiment, the blade 5 is in the normal working position, and the angle of the blade 5 is designed to be +35 °, but not limited thereto. The hydraulic cylinder 9 is in an oil inlet state, 3.5-4 MPa hydraulic oil enters the hydraulic cylinder 9 from the oil inlet nozzle 8, the telescopic end of the hydraulic cylinder 9 overcomes the force of the second spring 10 to drive the rack 3 mounted on the hydraulic cylinder to move axially upwards, the rack 3 drives the gear 19 on the blade 5 to rotate, the blade 5 rotates, the telescopic end of the hydraulic cylinder 9 stops moving when moving to the spigot surface of the top cover 2, the hydraulic cylinder 9 maintains pressure, the angle of the corresponding blade 5 is designed to be +35 degrees, and forward wind (blowing) is output at the moment.

When the blade 5 is in the air suction operation, the angle of the blade 5 is designed to be-30 degrees, but is not limited to this angle. The hydraulic cylinder 9 is in a pressure relief state, the oil inlet nozzle 8 is communicated with an oil inlet and outlet loop, under the action of the elastic force of the second spring 10, the telescopic end of the hydraulic cylinder 9 moves downwards along the axial direction to discharge oil, meanwhile, the telescopic end of the hydraulic cylinder 9 drives the rack 3 mounted on the hydraulic cylinder to move downwards along the axial direction, the rack 3 moves to drive the gear 19 on the blade 5 to rotate, and the blade 5 rotates in the direction. The hydraulic cylinder 9 stops moving when moving to the spigot surface of the through cover 7, the rotating angle of the corresponding blade 5 is minus 30 degrees, and then reverse wind (induced draft) is output.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details given herein and to the embodiments shown and described without departing from the generic concept as defined by the claims and their equivalents.

Claims

1. A reversing fan, comprising:

2. The reversing fan according to claim 1, wherein the oil inlet pipe has a first stepped configuration with respect to an inner wall of the rotary joint, and a transition sleeve is fixed to an outer casing of the rotary joint, and the transition sleeve is fixed to the first stepped configuration of the rotary joint by a roll pin;

3. The reversing fan according to claim 2, wherein the upper portion of the rotary joint housing is sealingly connected to the inner wall of the first large-bore oil passage by a first seal ring; and a second sealing ring is arranged on the outer wall of the oil inlet pipe.

4. The reversing fan according to claim 1, wherein the upper portion of said pipe joint is connected to said oil inlet pipe by a plurality of sets of bearings, and bearing spacers are provided between said bearings.

5. The reversing fan according to claim 1, wherein the housing of which the pipe joint contacts the bottom surface of the lowermost bearing has a second stepped structure, and a first elastic retainer ring is provided between an outer wall of the second stepped structure and an inner wall of the oil feed pipe, and a second elastic retainer ring is provided between the pipe joint and the top surface of the uppermost bearing.

6. The reversing fan according to claim 1, wherein the second oil inlet duct is formed by a second small-bore oil passage and a second large-bore oil passage perpendicular to the second small-bore oil passage, which are vertically arranged, from top to bottom.

7. The reversing fan according to claim 1, further comprising a pair of weights respectively located at upper and lower sides of the tip of the blade, and fixed by bolts and nuts, and the bolts vertically penetrate the gear shaft;

and a thrust bearing is connected between the gear shaft and the fan drum.

8. The reversing fan of claim 1, wherein the telescoping end of the hydraulic cylinder is coaxially connected to one end of a second spring, the other end of the second spring being connected to the top cover of the fan drum; the second spring is set to be in a compressed state when the telescopic end of the hydraulic cylinder extends out.

9. The reversing fan according to claim 1 or 8, wherein a transparent cover is fixed to the outer periphery of the hydraulic cylinder, an inner ring of the transparent cover is of a hollow structure and is coaxially arranged with the telescopic end of the hydraulic cylinder, a plurality of first clamping grooves are formed in the inner ring of the transparent cover at intervals, a plurality of second clamping grooves are correspondingly formed in the outer periphery of the telescopic end of the hydraulic cylinder, and the first clamping grooves and the second clamping grooves are clamped through guide blocks to limit the telescopic end of the hydraulic cylinder to move axially along the first clamping grooves and the second clamping grooves.

10. The reversing fan according to claim 1 or 7, wherein said blades are 5 in number and are disposed at equal intervals on the side circumference of the fan drum.