JPH0446271A - Piston with guide - Google Patents

Abstract

PURPOSE:To smoothly reciprocate a piston in a cylinder by fitting a sliding guide on the circumference of a piston. CONSTITUTION:A piston rod 2 is passed through a cylinder 1, and a piston main body 3 is fixedly secured on the piston rod 2. A sliding guide 4 is tightened on the upper part of the piston main body 3 with bolts and the like. Hereby, in the case of reciprocating of the piston main body 3 in the cylinder 1, because the piston main body 3 is not directly contacted with the inner face of the cylinder 1 but the guide 4 provided on the piston main body 3 is contacted with it, the piston main body 3 is smoothly reciprocated, wear, friction heat, and the like are reduced, and efficiency of the device is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] Most of the present invention is used in a relatively large-capacity piston device in which the cylinder is operated by being immersed in a liquid medium.

[Prior Art] Currently used piston devices have relatively small diameter pistons, cylinders, etc., making it impossible to manufacture and operate large-capacity piston devices. Even if it could be manufactured, there were problems in actual operation, such as piston and cylinder wear, distortion, eccentricity, clogging accidents, etc.

[Problems to be Solved by the Invention] In the above-mentioned current situation, when the piston device becomes larger, the first problem is the 11th workmanship problem, and the second problem is the wear and friction of both when the piston and cylinder are in direct friction. The purpose is to solve the problems of heat, thirdly, distortion due to shock loads, etc., and fourthly, problems such as clogging accidents caused by working fluid and impurities contained in the working medium liquid, by providing a guide in the piston. shall be.

[Means for Solving the Problems] The present invention solves the above-mentioned problems by avoiding direct contact between the cylinder and the piston body, which not only reduces the wear of both, but also reduces the frictional resistance and frictional heat generated due to this. etc. will be eliminated, and the efficiency of the equipment can be expected to increase. That is, as a countermeasure to this problem, first of all, a sliding guide is attached around the piston so that the piston can reciprocate smoothly within the cylinder. Second, provide a roller guide around the piston. Third, provide a guide pin around the piston. Fourthly, the problem can be solved by providing a kite block around the piston, but any of these methods can be used depending on the purpose and specifications of the device.

[Function] When the piston reciprocates within the cylinder in this device configured as described above, the piston body does not come into direct contact with the inner surface of the cylinder, but instead uses the guides, guide pins, guide blocks, and seals provided on the piston. By bringing the plates, gaskets, etc. into contact with each other, the reciprocating movement of the piston is made smooth, and wear and frictional heat are reduced, thereby increasing the efficiency of the device.

[Embodiment] The following embodiment will be explained based on the drawings. FIG. 1 is a longitudinal sectional view of the present invention. The configuration of this figure will be explained below.

First, a piston rod 2 is passed through a cylinder 1, and a piston body 3 is fixed to this rod. Next, as a first type of piston guide, a sliding guide 4 is attached to the upper part of the piston body and is fastened to the piston body with bolts or the like. As a second type, a piston guide 5 and a seal plate 6 are integrated into the upper part of the piston body and are fastened to the piston body with bolts or the like. As a third type, a guide with rollers attached to the lower part of the piston body, that is, a roller guide 7 is fastened to the piston body with bolts or the like. As a fourth type, a guide pin 8 is provided on the side surface of the piston body. As a fifth type, a guide block 9 is provided on the side surface of the piston body. It is assumed that all the guides of the first type to the fifth type are arranged evenly on the circumference of the piston. In addition, the guides of types 1 to 5 can be arranged according to the intended use, regardless of whether the guides are located above, below, or to the left or right of the piston from the arrangement shown in this figure.

Next, the operation according to FIG. 1 will be explained below. When the piston main body 3 reciprocates within the cylinder 1, if there is no guide for the piston, the piston main body 3 tends to reciprocate within the cylinder 1 in an eccentric manner to one side. That is, this phenomenon causes uneven wear of the piston body, cylinder, and piston rod, leading to performance deterioration and damage to the device.

In order for the piston to reciprocate smoothly in the cylinder,
It is necessary to improve the accuracy of the concentricity of the cylinder and piston, and to always equalize the gap between them as much as possible. For this purpose, it is necessary to attach some or all of the piston guides of the first to fifth types described above to the piston body 3. The following explanation will be given with reference to FIG.

FIG. 2 is a plan view and a side view showing details of the first type of sliding guide among the piston guides.

The configuration and operation of this diagram will be explained below.

First, there is a slight gap between the cylinder 1 and the piston body 3, and the sliding guides 4 are arranged evenly on the circumference of the piston body so that both can relatively reciprocate. It is assumed that it is tightened. In addition, measures such as split bolts, spring washers, double nuts, and caulking are taken to prevent bolts and nuts from loosening. Next, the material of the sliding guide is different from that of the cylinder 1, and it is natural that resin, plastic, metal, etc. are used, but ceramics, etc. can also be used, and a material with relatively low wear should be selected. . With this device configured as described above, a sliding guide is provided during the relative reciprocation or relative rotation of the cylinder and piston, so that the piston body does not directly touch the cylinder and the gap between the two can be maintained at a constant interval. This allows for smooth operation. Also, in the contact between the piston body and the cylinder,
If a sliding guide is not provided, there will be a surface contact and a large frictional force, but by providing a sliding guide, a line contact will be made and the frictional force will be relatively small, and an increase in the efficiency of the device can be expected.

Figure 3 shows a plan view showing details of a second type of piston guide that integrates a piston guide and a seal plate, and a side view of the same. The point is that a gasket-like seal plate is integrated and attached to the aforementioned sliding guide. In other words, when the piston main body reciprocates within the cylinder by installing this seal plate, the guide 5 of the piston acts as a guide during the reciprocating movement within the cylinder 1 and increases the concentricity of both, while the seal plate It strives to increase piston efficiency. Further, the seal plate also functions as a guide for the piston body.

The next explanation will be given with reference to FIG.

Fig. 4 is a detailed diagram illustrating the first plan of the roller guide as the third type of piston guide. In the case of FIG. 2, the method of contact with the cylinder 1 is a sliding type, whereas in this figure, it is a roller type. That is, depending on the specifications and uses of the device, use of rollers can reduce wear, frictional heat, and the like. The subsequent explanation is the same as the explanation for FIG. 2, and will not be repeated.

Figure 5 is a detailed diagram illustrating the second version of the roller guide as the third type of piston guide. It just changed. Therefore, the subsequent explanation is the same as that of FIG. 4, and the explanation will not be repeated.

FIG. 6 is a plan view and a side view showing details of a fourth type of piston guide in which a guide pin 8 is provided on the side surface of the piston body. The main difference between this figure and the explanation of FIG. 2 is that the guide of the piston is in line contact with the cylinder in FIG. 2, whereas in this figure it is in point contact. In other words, equipment specifications, usage,
Depending on the operation, wear and frictional heat can be reduced by making point contact. The subsequent explanation is the same as that of FIG. 2, and will not be repeated.

FIG. 7 is a plan view and a side view showing details of a cross section when a guide block 9 is provided around the piston body as a fifth type of piston guide. The configuration and effects of this figure will be explained below.

First, the figure shown at the top of this figure is a plan view showing a cross section when the guide block 9 is attached around the piston. In order to maintain a constant gap between the cylinder 1 and the piston body 3, guide blocks 9 are installed continuously or intermittently at regular intervals around the outer circumference of the piston, and are fixed to the piston body with bolts 12 or the like. Next, the bolt holes of the guide block 9 are filled with adhesive or welding depending on the use of the device. Further, the figure shown at the bottom is a side view showing a cross section at the mounting bolt portion in the plan view shown at the top. In other words, the guide block 9 is installed in such a way that the outer surface of the cylinder is scraped off and the guide block is implanted in the scraped part, as can be seen from these two upper and lower figures.
It is assumed that the piston body 3 and the guide block 9 are substantially integrated.

In the above-described configuration, when the piston body and the cylinder make relative reciprocating motion in this figure, the piston body 3 does not come into contact with the inner surface of the cylinder 1, but the outer surface of the guide block 9 comes into contact.

That is, this is not a full-scale contact between the piston and the cylinder, but a partial line contact of the guide block 9. As a result, as a matter of course, frictional resistance, frictional heat, etc. due to contact between the two are reduced. Next, since the guide block 9 has a certain length on the outer circumference of the piston body, by attaching it continuously or intermittently at a certain interval on the circumference of the piston,
Since the length of the guide block is reduced relative to the circumferential length of the piston, the amount of leakage in the gap between the piston and the cylinder can be reduced. That is, by providing this guide block 9 on the piston, the relative reciprocation of the piston and cylinder as well as
This allows for smoother operations such as relative rotation, and at the same time increases efficiency.

[Effects of the Invention] As is clear from the above description, many of the piston devices currently in practical use are relatively small-scale devices, so there is no need to provide a guide on the piston. However, in connection with the problem of preventing global environmental destruction, the need for clean energy and the need for water purification devices for oceans, lakes, etc. has made it an urgent issue to develop wave energy conversion devices such as wave bombs. became. In a wave energy conversion device, the best way is to convert the kinetic energy of waves into the reciprocating motion of a piston, and for this purpose, the development of a large-capacity piston device, in other words, by providing a guide on the piston, It is necessary to improve the smoothness, durability, and efficiency of the operation of these devices. In other words, the present invention will rapidly accelerate the pace of development of wave energy conversion devices such as wave bombs, and will make an extremely large contribution to industry and the future.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the present invention. FIG. 2 is a plan view and a sectional view showing details of a first type of sliding guide of the piston guides of the present invention. FIG. 3 is a plan view and a side view showing details of a second type of piston guide in which a piston guide and a seal plate are integrated. Figure 4 shows the third type of piston guide, the first type of roller guide.
FIG. 5 is a detailed view showing an explanation of the second plan of the roller guide, which is a third type of piston guide. FIG. 6 is a plan view and a side view showing details of a fourth type of piston guide in which a guide pin 8 is provided on the side surface of the piston body. FIG. 7 is a plan view and a side view showing details of a cross section when a guide block 9 is provided around the piston body as a fifth type of piston guide. Symbols 1, Cylinder 2, Piston rod 3, Piston body 4, Sliding guide 5, Piston guide 68. , seal plate?
,,,, o-roller guide 7', 7'',,,roller guide body 8,,,Jj
4 Tohin 9 , , Guide block 10.10
',,,,Roller 11. ll'、、、、Shaft patent applicant Representative director of Taiyo Plant Industries Co., Ltd.
Yasuhiro Manabe

Claims (1)

[Scope of Claims] 1. A piston equipped with a guide, which is characterized in that by providing a guide on the piston in the cylinder, the piston can smoothly reciprocate within the cylinder. 2. A piston equipped with a guide, characterized in that the piston can smoothly reciprocate within the cylinder by providing a sliding guide (4) in the piston guide. 3. By integrating the piston guide (5) provided on the piston and the seal plate (6), the piston can reciprocate smoothly within the cylinder, and the seal plate (6)
A piston equipped with a guide that improves performance by increasing the accuracy of the gap between the cylinder and piston. 4. A piston equipped with a guide, characterized in that the piston can smoothly reciprocate within the cylinder by providing a roller guide (7) in the guide of the piston. 5. A piston equipped with a guide characterized in that the piston can smoothly reciprocate within the cylinder by providing a guide pin (8) in the guide of the piston. 6. By arranging guide blocks (9) around the piston continuously or intermittently,
A piston equipped with a guide that improves piston leakage efficiency and uniformity accuracy for the gap between the piston and cylinder.