JP6223536B1 - Rotary valve for starting - Google Patents

Abstract

To prevent a U-shaped bent portion from being formed in a pipe connecting outlets of a plurality of air passages of a starting rotary valve and a starting valve. A housing having a plurality of air passages 2 corresponding to the number of cylinders and outlets 2b of the plurality of air passages, and a shaft rotatably supported by the housing and connected at one end to a camshaft. And a rotary valve body having one through hole that sequentially communicates with the plurality of air passages along with the rotation of the disk portion. The housing is attached to the housing so as to cover the disc portion of the rotary valve body, and includes a cover having an air inlet, and outlets of the plurality of air passages open upward or obliquely upward. [Selection] Figure 3

Description

  The present invention relates to a rotary valve for starting an internal combustion engine that sequentially distributes compressed air from an air pressure source to a start valve provided for each cylinder of the internal combustion engine such as a diesel engine.

  Conventionally, as this type of starting rotary valve, there is one shown in FIG. 1 of JP-A-11-303713 (Patent Document 1).

  In this conventional starting rotary valve (referred to as a start air control valve in Patent Document 1), six outlets of six air passages provided in the housing are arranged at equal intervals around the housing. ing. Therefore, half of the three outlets open downward.

JP-A-11-303713

  As described above, in the conventional starting rotary valve, among the six outlets provided on the outer peripheral portion of the housing, half of the three outlets are directed downward. The pipe connected to the outlet inevitably bends in a U shape and is connected to a start valve for each cylinder.

  Thus, in the conventional starting rotary valve, the outlet of the air passage and the start valve are inevitably connected by a pipe bent in a U-shape, so that the U-shaped bent portion of the pipe However, it becomes a reservoir of liquid such as drain water from the air and lubricating oil that lubricates the sliding part of the rotary valve, and the liquid such as drain water and lubricant that has accumulated in the reservoir at the start-up There is a problem of jetting around the start valve. This discharge of liquid such as drain water and lubricating oil contaminates the surrounding environment, and in the case of remarkable, it causes a fire, and there is a problem that rust and the like are generated by the accumulated water and the life of the equipment is impaired.

  Accordingly, an object of the present invention is to prevent the U-shaped bent portion (liquid reservoir) from being formed in the piping connecting the outlets of the plurality of air passages of the starting rotary valve and the start valve, and to provide drain water, lubrication An object of the present invention is to provide a starting rotary valve capable of preventing the ejection of liquid such as oil, preventing contamination of the surrounding environment, preventing the occurrence of a fire, and extending the life of equipment.

In order to solve the above-mentioned problem, the starting rotary valve of the present invention is
A housing having a plurality of air passages corresponding to the number of cylinders and outlets of the plurality of air passages;
The shaft has a shaft portion rotatably supported by the housing and one end connected to the camshaft, and a disk portion connected to the other end side of the shaft portion. A rotary valve body having one through hole that sequentially communicates with the plurality of air passages;
The housing is attached so as to cover the disk portion of the rotary valve body, and includes a cover having an air inlet,
The outlets of the plurality of air passages open upward or obliquely upward ,
The radial end surface of the housing, in which the outlets of the plurality of air passages are open, is inclined with respect to a vertical plane so as to be directed obliquely upward .

  According to the above configuration, since the outlets of the plurality of air passages are opened upward or obliquely upward, it is necessary to bend the pipe connecting the outlets of the plurality of air passages and the start valve in a U shape. As a result, there is no U-shaped bent portion, that is, a reservoir portion of liquid such as drain water or lubricating oil.

  Therefore, when starting, liquids such as drain water and lubricating oil are no longer ejected from the start valve, preventing contamination of the surrounding environment, preventing the occurrence of fire, and preventing the occurrence of rust, etc. Can extend the service life.

Further, the radial end surface of the housing, in which the outlets of the plurality of air passages are open, is inclined with respect to the vertical plane so as to face obliquely upward.

As described above , since the radial end face of the housing where the outlets of the plurality of air passages are open is inclined obliquely upward, the outlet of the air passage is inclined upward. It is possible to simplify the process of opening toward.

In the present invention ,
The outlets of the plurality of air passages are provided at different positions with respect to the axial direction of the rotary valve body.

According to this invention , since the outlets of the plurality of air passages are provided at different positions with respect to the axial direction of the rotary valve body, the outlets of the plurality of air passages open upward or obliquely upward. Even if it arrange | positions in this way, interference of the opening or the metal fitting connected to the opening can be prevented easily.

  According to the present invention, since the outlets of the plurality of air passages open upward or obliquely upward, it is not necessary to bend the piping connecting the outlets of the plurality of air passages and the start valve in a U shape. As a result, there is no reservoir of liquid such as drain water and oil, and liquid such as drain water and oil will not be ejected from the start valve at the time of starting, preventing pollution of the surrounding environment and preventing fires from occurring. In addition, it is possible to extend the life of the equipment by preventing the occurrence of rust and the like.

It is sectional drawing of the rotary valve for start-up of one Embodiment of this invention. It is the left view which fractured | ruptured a part of said starting rotary valve. It is a step view of the principal part of the housing of the starting rotary valve. It is a left view of the housing of the said starting rotary valve. It is A arrow directional view of FIG.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  As shown in FIG. 1, the starting rotary valve of this embodiment includes a housing 1, and the housing 1 has a plurality of air passages 2 (only one in FIG. 1) corresponding to the number of cylinders of an internal combustion machine (not shown). Is provided). This starting rotary valve is for a 6-cylinder internal combustion machine, and the number of air passages 2 is six as shown in FIGS. Although not shown, for example, in the case of eight cylinders, the number of air passages is eight according to the number of cylinders.

  In the housing 1, there is provided a rotary valve body 3 for opening and closing the air passages 2, 2, 2,. The rotary valve body 3 includes a shaft portion 31 and a disc portion 32 extending in the horizontal direction, and the shaft portion 32 is rotatably supported by the housing 1 via a bush 5. One end of the shaft portion 31 is connected to the camshaft 7 through the intermediate joint 6, and the disc portion 32 is connected to the other end of the shaft portion 31. This disk portion 32 is provided with a single through hole 33, and by rotation of the disk portion 32, a plurality of air passages 2, 2, 2,. 4), the inlets 2a, 2a, 2a,...

  The cover 15 is attached to the housing 1 with bolts 16, 16, 16 (see FIGS. 1 and 2) so as to cover the disk portion 32. The cover 15 is provided with an air inlet 17, and the compressed air supplied from the air inlet 17 passes through the through-hole 33 by the rotation of the disk portion 32, and a plurality of air passages 2, 2, 2. Are sequentially supplied.

  More specifically, as shown in FIG. 4, the inlets 2 a, 2 a, 2 a,... Of the plurality of air passages 2, 2, 2, ... are in the axial direction of the housing 1 (the axis of the shaft portion 31 of the rotary valve body 3 Are provided at equal intervals on the same pitch circle. Along with the rotation of the rotary valve body 3, the through holes 33 of the disc portion 32 of the rotary valve body 3 have inlets 2a, 2a, 2a,. , The compressed air from a starting air tank (not shown) passes through the air inlet 17 of the cover 15 and the through hole 33 of the disk portion 32 of the rotary valve body 3 and passes through the air passage 2 of the housing 1. .. Flows into the inlet 2a, passes through the air passage 2, and is supplied from one of the outlets 2b, 2b, 2b... Of the plurality of air passages 2, 2, 2,. It has come to be.

  As shown in FIG. 3, the end face (hereinafter referred to as the radial end face) 21 of the housing 1 in which the outlets 2b, 2b, 2b... Of the plurality of air passages 2, 2, 2,. , 22 are inclined with respect to the vertical plane V so as to face obliquely upward. Further, the outlets 2b, 2b, 2b... Of the plurality of air passages 2, 2, 2,. Pipes such as a taper screw for pipes and a parallel screw for pipes are cut on the inner surfaces of the outlets 2b, 2b, 2b.

  As shown in FIG. 3, the plurality of air passages 2, 2, 2,... Are composed of a horizontal portion and an upward gradient portion from the inlets 2a, 2a, 2a,... To the outlets 2b, 2b, 2b,. In this way, a reservoir of lubricating oil or the like is prevented from being generated.

  Further, as shown in FIG. 5, the outlets 2 b, 2 b, 2 b of the air passages 2, 2, 2 are located at different positions with respect to the axial direction of the rotary valve body 3 on the radial end surface 21 on the outer peripheral side of the housing 1. So that a joint portion of a pipe (not shown) does not interfere. Although the radial end face 22 on the outer peripheral side of the housing 1 is not shown, the outlets 2b, 2b, 2b of the air passages 2, 2, 2 are rotated in the same manner as the radial end face 21 on the outer peripheral side shown in FIG. It is provided at a different position in the axial direction of the valve body 3 so that a joint portion of a pipe (not shown) does not interfere.

  In FIG. 1, reference numerals 51, 52, 53, and 54 denote lubricating oil passages.

  According to the starting rotary valve having the above configuration, the outlets 2b, 2b, 2b... Of the plurality of air passages 2, 2, 2,. It is no longer necessary to bend the pipe connecting the outlets 2b, 2b, 2b,..., And the start valve (not shown) in a U-shape, and the U-shaped bend, that is, drain water, lubricating oil, etc. There is no liquid reservoir.

  Therefore, when starting, liquids such as drain water and lubricating oil are no longer ejected from the start valve, preventing contamination of the surrounding environment, preventing the occurrence of fire, and preventing the occurrence of rust, etc. Can extend the service life.

  Further, the radial end surfaces 21 and 22 of the housing 1 through which the outlets 2b, 2b, 2b,... Of the plurality of air passages 2, 2, 2,. Since it is inclined, the process of opening the outlets 2b, 2b, 2b... Of the air passages 2, 2, 2,.

  Further, since the outlets 2b, 2b, 2b,... Of the plurality of air passages 2, 2, 2,... Are provided at different positions with respect to the axial direction of the rotary valve body 3, the plurality of air passages 2, 2, 2. Even if the outlets 2b, 2b, 2b,... Are arranged so as to open obliquely upward, it is possible to easily prevent the interference of the opening or the metal fitting connected to the opening.

  In the above embodiment, the outlets 2b, 2b, 2b... Of the plurality of air passages 2, 2, 2,... Open obliquely upward, but all the outlets of the air passages open upward. May be.

  In the above-described embodiment, the radial end surfaces 21 and 22 of the housing 1 through which the outlets 2b, 2b, 2b... Of the plurality of air passages 2, 2, 2,. However, it is also possible to provide all the outlets of the air passages on the radial end face facing upward, with the radial end face facing upward.

  In the above embodiment, the start rotary valve for 6 cylinders has been described. However, the present invention can be similarly applied to a start rotary valve for 8 cylinders.

  It goes without saying that the constituent elements described in the above-described embodiments and modifications may be combined as appropriate, and may be selected, replaced, or deleted as appropriate.

DESCRIPTION OF SYMBOLS 1 Housing 2 Air passage 2a Inlet 2b Outlet 3 Rotating valve body 5 Bush 15 Cover 17 Air inlet 21, 22 Radial direction end surface 31 Shaft part 32 Disc part 33 Through-hole V Vertical surface

Claims (2)

A housing having a plurality of air passages corresponding to the number of cylinders and outlets of the plurality of air passages;
The shaft has a shaft portion rotatably supported by the housing and one end connected to the camshaft, and a disk portion connected to the other end side of the shaft portion. A rotary valve body having one through hole that sequentially communicates with the plurality of air passages;
The housing is attached so as to cover the disk portion of the rotary valve body, and includes a cover having an air inlet,
The outlets of the plurality of air passages open upward or obliquely upward ,
A starting rotary valve characterized in that a radial end surface of the housing, at which outlets of the plurality of air passages are open, is inclined with respect to a vertical plane so as to face obliquely upward . A housing having a plurality of air passages corresponding to the number of cylinders and outlets of the plurality of air passages;
The shaft has a shaft portion rotatably supported by the housing and one end connected to the camshaft, and a disk portion connected to the other end side of the shaft portion. A rotary valve body having one through hole that sequentially communicates with the plurality of air passages;
A cover attached to the housing so as to cover the disc portion of the rotary valve body and having an air inlet;
With
The outlets of the plurality of air passages open upward or obliquely upward,
The starting rotary valve characterized in that outlets of the plurality of air passages are provided at different positions with respect to the axial direction of the rotary valve body .

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