JPH0437749B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a blower device for a chemical solution spraying vehicle (speed sprayer) used for spraying chemical solutions in orchards and the like.

BACKGROUND TECHNOLOGY As shown in FIG. 6, a conventional blower device for a chemical spraying vehicle includes an outer casing 52 mounted on the rear of a vehicle body 50 and defining an intake port 51 at one end, and an outer casing 52 that includes an air inlet 51 at one end. An inner casing 53 arranged concentrically and supported by stator vanes 60, and a rotating shaft 54 rotatably supported by the inner casing 53.
and the outer casing 5 attached to the rotating shaft 54.
A blower impeller 55 is rotatably driven within the outer casing 52, and a discharge is spaced apart from the other end of the outer casing 52 in the axial direction of the rotating shaft and opens radially to both sides and upward of the vehicle body together with the outer casing 52. an air discharge guide plate 57 defining the air outlet 56; a shaft cover 58 having a circular cross-sectional shape surrounding the rotating shaft 54;
It consisted of a rectifying plate 59 that divides the air flow path up to the air outlet 56 into a plurality of sections.

Problems to be Solved by the Invention In such a conventional blower device, the lower blowing passage 6
1, the shaft cover 58 must be made as thin as possible to reduce resistance, and a rectifying plate 59 must be provided to form a fan-shaped air discharge shape. It had drawbacks such as being complicated and expensive.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve the problems of the conventional blower and to provide a simple and inexpensive blower for a chemical spray vehicle.

Means for Solving the Problems The blower device for a chemical spraying vehicle according to the present invention includes an outer casing mounted on a vehicle body and defining an intake port at one end, and an inner casing disposed concentrically within the outer casing. a rotating shaft rotatably supported by the inner casing; a blower impeller attached to the rotating shaft and rotationally driven within the outer casing; an air discharge guide plate that is spaced apart from the outside and defines an air outlet that opens radially to both sides and upward of the vehicle body together with the outer casing;
The air discharge guide plate is characterized in that it has a shaft cover that surrounds the rotating shaft and has a fan-shaped cross section that gradually expands in a morning glory shape and surrounds the rotating shaft at the center of the air discharge guide plate.

Effect: According to the configuration of the present invention, the airflow flows to the air outlet along the shaft cover formed in the center of the air outlet plate,
A good air discharge shape can be formed only by the shaft cover having a fan-shaped cross section.

Embodiments Next, the present invention will be described based on embodiments of the drawings.

This embodiment shows a blower device 1 for dispersing chemical liquid according to the present invention.
As shown in FIG. 1, this chemical spraying vehicle has a vehicle body 2 with front wheels 3 driven by an internal combustion engine (not shown) mounted at the front of the vehicle.
and is supported so as to be able to run by the rear wheels 4,
A driver in the driver's seat 5 operates a steering wheel 6 and the like to control the driving in the same way as in a normal automobile. A chemical tank 7 is located in the center of the vehicle body 2.
is mounted. Furthermore, an internal combustion engine 8 for driving the blower is installed in the vehicle body between the tank 7 and the blower 1.
The internal combustion engine 8 is configured to rotate the rotating shaft 10 of the air blower 1 at a predetermined speed via a belt and pulley transmission device 9.

The blower device 1 is an axial blower, and is arranged rearward with respect to the vehicle body 2 so that the axis of its rotating shaft 10 extends in the longitudinal direction of the vehicle body 2. The air blower 1 has a cylindrical outer casing 11 that is arranged concentrically with a rotating shaft 10 and fixed to the vehicle body 2, and the outer casing 11 has a circular air intake port 12 at the end facing the rear of the vehicle body 2. is formed.

A boss portion 14 of a blower impeller 13 is fixed to the tip of the rotating shaft 10, and the impeller 13 has a plurality of rotor blades extending radially from the boss portion 14 to near the inner circumferential surface of the outer casing 11. There are 15. The front surface of the boss portion 14 facing the intake port 12 (the rear side of the vehicle body 2) is covered by a spinner 16 to minimize turbulence in the airflow flowing there. An inner casing 17 having approximately the same diameter as the boss portion 14 is disposed coaxially close to the rear surface of the boss portion 14, and the inner casing 17 has a plurality of stationary blades fixed to the inner peripheral surface of the outer casing 11. It is fixedly supported by 18. The axial length of the inner casing 17 is shorter than the axial length of the outer casing 11 , and the inner casing 17 terminates within the interior space of the outer casing 11 . In this way, an annular air flow path 19 directed toward the front side of the vehicle body 2 is formed inside the outer casing 11.

A bracket member 20 that stands upright from the vehicle body 2 is fixed to the vehicle body 2 at a position remote from the outer casing 11 toward the leeward side of the blower. The rotary shaft 10 is rotatably supported by a bearing 22 provided.

An air discharge guide plate 23 is attached to the surface of the bracket member 20 on the outer casing 11 side. A discharge air guide plate 23 extends upward from the vehicle body 2 substantially parallel to the discharge end 24 of the outer casing 11. A shaft cover 25 is integrally provided at the center of the discharge guide plate 23. As shown in FIG. 2, the shaft cover 25 has a fan-shaped cross section with a widened upper surface.
The rotary shaft 10 is eccentrically arranged so as to pass through the shaft cover 25 at a position close to the fan-shaped latch 26 . The shaft cover 25 fits into the downstream end 28 of the inner casing 17 at the upstream end 27 which has the smallest fan-shaped cross-sectional shape.
The shaft cover 25 has a fan-shaped cross-sectional shape that expands in diameter upward and laterally from an upstream end 27 connected to the internal casing 17 to a downstream end 29 connected to the discharge guide plate 23.
In addition, it is curved and expanded into a morning glory shape so that the fan-shaped opening degree α gradually increases from about 60 degrees at the upstream end 27 to about 120 degrees at the downstream end 29, so that an ideal chemical liquid dispersion pattern can be obtained. ing. The downstream end 29 of the shaft cover 25 connected to the discharge guide plate 23
forms a continuous smooth wall surface.

In this way, the air outlet end 24 of the outer casing 11, the air outlet guide plate 23, and the shaft cover 25 form a semicircular air outlet 30 that opens upward and laterally from both sides of the vehicle body 2.

The discharge guide plate 23 has a recessed portion 31 extending in a semicircular shape in the circumferential direction close to its outer peripheral end, and a chemical solution supply pipe 32 is disposed within the recessed portion 31 . The chemical liquid supply pipe 32 has a plurality of chemical liquid spray nozzles 33 connected to each other at predetermined intervals,
The respective chemical liquid spray nozzles 33 extend into the air outlet 30 and are arranged in a semicircular shape.

An inclined surface 34 that is inclined radially outward toward the outer casing 11 is provided on a radially outer portion of the recessed portion 31 of the air discharge guide plate 23 .
It is formed in a semicircular shape extending around the periphery of the . The airflow flowing near the outer casing 11 in the air flow path 19 has a fairly large axial velocity component at the air outlet 30, and therefore the airflow coming out of the air outlet 30 is directed toward the front of the vehicle body 2. The air tries to scatter toward the driver's seat 5, but the axial velocity component of the air flow is attenuated by the inclined surface 34 and deflected backward, so it flows near the inner casing 17 and is deflected into a radial flow. The air flows outward in the radial direction together with the air flow generated by the driver's seat 5, and prevents the air from scattering toward the driver's seat 5. Due to the airflow from the blower device 1 deflected in the radial direction in this way,
The chemical liquid sprayed from the chemical liquid spray nozzle 33 is widely dispersed radially outward of the air outlet 30.

A substrate 35 having the same height as the lower surface of the inner circumferential surface of the external casing 11 is provided below the air outlet 30 . The substrate 35 has front and rear wall portions 36 bent downward.
and 37, and is fixed to the outlet end 24 of the outer casing 11 and the outlet guide plate 23 at the wall portions 36 and 37, respectively. A pair of movable plates 38 (only one of which is shown) extending in the width direction of the vehicle are provided at both ends of the base plate 35. Each movable plate 38 has a U-shaped cross section with front and rear wall portions 39 and 40 bent downward, and elongated holes 41 and 42 are formed at one end of the wall portions 39 and 40, respectively. , the rear wall portion 39 of the movable plate 38 is screwed into a bolt 44 with a shaft support portion passing through a hole 43 and an elongated hole 41 formed in the air discharge end 24 of the external casing 11 and the rear wall portion 36 of the base plate 35. It is slidably attached to the inner surface of the rear wall portion 36 of the base plate 35 by a nut 45 . On the other hand, the front wall portion 40 of the movable plate 38
A square root round head bolt 47 passes through a hole 46 and an elongated hole 42 formed in the front wall portion 37 of the air discharge guide plate 23 and the base plate 35, and a knob nut 4 is screwed into the bolt 47.
8 against the front wall portion 37 of the base plate 35. With this configuration, the operator loosens only the knob nut 48 and then drives the movable plate 38 up and down using the free end of the movable plate 38, thereby easily adjusting the angular position of the movable plate 38. Since the shape of the wind discharge in the horizontal direction can be set according to the topography of the orchard and the type of trees, the spray pattern of the chemical solution can be changed as appropriate.

Effects of the Invention With the configuration of the present invention described above, the structure of the blower device can be simplified by removing the conventionally required baffle plate, and only the fan-shaped shaft cover with a fan-shaped cross section is provided integrally with the blower guide plate. It has excellent effects such as being able to easily obtain an ideal chemical spray pattern.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of the main part of a chemical solution spraying vehicle equipped with an air blower according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of FIG. 4 is an enlarged view of the movable plate portion shown in the blower device of FIG. 1, FIG. 5 is a side view of the portion shown in FIG. 4, and FIG. 6 is an enlarged sectional view of the air outlet shown. 1 is a vertical sectional view of a main part of a conventional blower device. DESCRIPTION OF SYMBOLS 1... Air blower, 2... Vehicle body, 10... Rotating shaft, 11... External casing, 12... Intake port,
13...Blower impeller, 17...Inner casing,
23... Air discharge guide plate, 25... Shaft cover, 30...
...vent outlet.

Claims (1)

[Claims] 1. An outer casing mounted on the vehicle body and defining an intake port at one end; an inner casing disposed within the outer casing and concentric therewith; a rotating shaft rotatably supported by the inner casing; a blower impeller that is attached to a shaft and rotationally driven within the outer casing; and a blower impeller that is spaced apart from the other end of the outer casing in the axial direction of the rotating shaft and that is attached to both sides and above the vehicle body together with the outer casing. an air discharge guide plate defining an air outlet opening in the radial direction; A blower device for a chemical solution spraying vehicle, characterized by having a shaft cover with a fan-shaped cross-section that is curved and enlarged.