JPH04105261U - Seal ring - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a seal ring that can be installed on a piston or shaft without any operational errors and that can reliably seal between the piston and the cylinder during operation. [Structure] The seal ring 1 is composed of a pair of ring members 2 and 3 which are given elasticity in the radial direction by the separation parts 2d and 3d. the other end surface 2c forming a slope with respect to the end surfaces 2b and 3b;
Form 3c. Then, the other end surface 2 of each ring member 2, 3 is in a state where the separation parts 2d, 3d are shifted in position in the circumferential direction.
c and 3c are joined to each other at inclined planes, and the relative rotation of each ring member 2 and 3 is restricted so that the separated portions 2d and 3d are not continuous.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is based on pistons, which are component parts of compressors, Stirling engines, etc. This is a seal ring that is attached to a cylinder or shaft to seal between cylinders, etc. be.

0002

[Conventional technology]

A conventional seal ring that is attached to a piston, etc. to seal between it and the cylinder. Metal piston rings 21 shown in FIGS. 6 to 8 have been generally known. this The piston ring 21 facilitates attachment to the piston 22 and 23, a cutoff portion 21a is provided at one location in the circumferential direction. It is designed so that it can be elastically deformed in the radial direction. And this piston ring 21 , both end surfaces 21b, 21b are formed in parallel planes perpendicular to the outer circumferential surface 21c. .

0003 Such a piston ring 21 is a ring formed on the outer peripheral surface of the piston 22. Although it is used by being attached to the groove 22a, in the case of a single piston ring 21, the separation part is Since sealing performance cannot be maintained due to 21a, two or more piston rings are generally used. 21 and 21 are used in combination. In this case, each piston ring 21, 21 is The position of the separated parts 21a, 21a is shifted in the circumferential direction so that they are not continuous. It is attached to the ring groove 22a of the tongue 22.

0004

[Problem that the idea aims to solve]

By the way, in the piston ring 21, both end surfaces 21b, 21b are the outer circumferential surface 21c. Since it is a parallel surface perpendicular to the ring groove 22a of the piston 22, the circumference is Easy to rotate in any direction. For this reason, each pin installed with the separation part 21a shifted in position. The stone rings 21, 21 rotate in the circumferential direction during the movement of the piston 22 and are separated. The parts 21a and 21a may be continuous, and there is a risk that sufficient sealing performance may not be maintained. There is. Moreover, when installing each piston ring 21, 21, the separation part 21a, It is necessary to shift the position so that 21a is not continuous, and the piston rings 21, 21 It is easy to make work errors when installing.

[0005] Therefore, this idea eliminates work errors when installing pistons and shafts, and allows for easy operation of pistons, etc. The purpose is to provide a seal ring that can reliably seal between the cylinder and the cylinder during operation. shall be.

[0006]

[Means to solve the problem]

In order to achieve the above purpose, the seal ring according to this invention has a diameter due to the cut-off part. A seal ring composed of a pair of ring members endowed with directional elasticity, , each ring member has one end surface that is perpendicular to the outer circumferential surface and the other end surface that is sloped. The other end faces are joined to each other at an inclined plane while the two ends are shifted in the circumferential direction. It is a feature.

[0007]

[Effect]

By adopting such a method, the seal ring of this invention can be When installing the ring into the ring groove of a ring or shaft, make sure that one end surface of each ring member is parallel to each other. The other end surfaces of both sea urchins are joined at an inclined plane. By doing so, the separation part of each ring member is Since the position shifts in the circumferential direction, there are no errors when installing the seal ring.

[0008] The seal ring installed in the ring groove of the piston, shaft, etc. in this way is attached to each ring part. Since the materials are joined on an inclined plane and relative rotation in the circumferential direction is restricted, the entire seal ring is circular. Although each ring member may rotate circumferentially, each ring member may rotate relative to each other in the circumferential direction. Therefore, the cut-off portions of each ring member are not continuous. Therefore, with the cylinder The space can be reliably sealed.

[0009]

【Example】

Embodiments of this invention shown in the drawings will be described below. 1 and 2 show a seal ring 1 according to a first embodiment of this invention. The ring 1 is composed of a pair of ring members 2 and 3 that are joined to each other. In addition, Both ring members 2 and 3 are made of metal or synthetic resin with small elastic deformation. ing.

0010 The ring members 2 and 3 each have one end surface 2b and 3 perpendicular to the outer peripheral surface 2a and 3a. b, and the other end surfaces 2c, 3 which are inclined at the same predetermined angle with respect to the one end surfaces 2b, 3b. c, the maximum width is set to h1, and the minimum width is set to h2. . Both ring members 2 and 3 are arranged so that their one end surfaces 2b and 3b are parallel to each other. By joining the other end surfaces 2c and 3c on the slope, the width h=h1+h2 as shown in FIG. A single seal ring 1 is formed.

[0011] In addition, each ring member 2, 3 has a separation portion 2d, 3d at its minimum width h2. is formed to provide radial elasticity.

0012 The seal ring 1 of the first embodiment configured in this way is, for example, as shown in FIG. It is used by being attached to the ring groove 4a of the piston 4. In this case, each ring member 2 and 3 are elastically expanded in the radial direction by the cutaway portions 2d and 3d to form the ring groove 4a. At that time, both ring members 2 and 3 form a single seal as a whole. The other end surfaces 2c and 3c are joined on the slope to form a ring 1 and installed in the ring groove 4a. It will be worn.

[0013] The seal ring 1 installed in the ring groove 4a of the piston 4 in this way is The cutaway portions 2d, 3d of the members 2, 3 are located 180° apart in the circumferential direction. Therefore , the separation parts 2d and 3d are not continuous, and the seal ring for the ring groove 4a is No work errors occur when attaching the plug 1.

[0014] Here, the width H of the ring groove 4a of the piston 4 is slightly larger than the width h of the seal ring 1. Since the setting is wide, each ring installed in the ring groove 4a and connected to each other at an inclined plane The connecting members 2 and 3 have room for relative rotation in the circumferential direction. But the relative rotation allowed The amount is small, and further relative rotation is restricted, so each ring member 2, 3 The cut-off parts 2d and 3d do not continue at the same position.

[0015] The seal ring 1 installed in the ring groove 4a of the piston 4 in this way is The outer peripheral surfaces 2a, 3a of the members 2, 3 are pressed against the inner wall surface 5a of the cylinder 5, and the cylinder 5 As mentioned above, the separation portion 2d of each ring member 2, 3 , 3d are not in the same position and are not continuous, so it is reliable even during the movement of the piston 4. It is possible to seal between the cylinder 5 and the cylinder 5.

[0016] 4 and 5 show a seal ring 11 according to a second embodiment of this invention. child As in the first embodiment, the seal rings 11 are joined to each other at bevels to form a whole. It is composed of a pair of ring members 12 and 13 forming a single seal ring 11. Here, the ring members 12 and 13 have one end surface 1 perpendicular to the outer peripheral surfaces 12a and 13a. 2b, 13b, and are inclined at the same predetermined angle with respect to the one end surfaces 12b, 13b. The width of each ring member 12, 13 is the maximum width. h, minimum width is set to 0. Each ring member 12, 13 has a minimum width. Slit-shaped separation portions 12d and 13d are formed at the portions.

[0017] Also in the seal ring 11 according to this second embodiment, each ring member 12, 13 is For example, by connecting the end surfaces 12c and 13c to each other at an inclined plane, the piston 4 can be It is attached to the groove 4a to restrict relative rotation in the circumferential direction. Therefore, the first implementation As in the example, the separation parts 12d and 13d are not continuous, ensuring sufficient sealing performance. I can do it.

[0018] In the above embodiments, the pair of ring members 2, 3 or 12, 13 is used for sealing. Although the ring 1 or 21 is configured, two or more, for example four, ring members 2, 3 , 12, 13 may be combined to form a single seal ring.

[0019]

[Effect of the idea]

As explained above, according to this invention, the seal ring is installed in the ring groove of the piston, shaft, etc. When installing the ring, make sure that one end of each ring member is parallel to the other end of both rings. By joining the surfaces on an inclined plane, will the position of the separated parts of each ring member shift in the circumferential direction? This eliminates work errors when installing the seal ring.

[0020] The seal ring installed in the ring groove of the piston, shaft, etc. in this way is attached to each ring part. Since the materials are joined on an inclined plane and relative rotation in the circumferential direction is restricted, the entire seal ring is circular. Although each ring member may rotate in the circumferential direction, each ring member does not rotate relative to each other in the circumferential direction. The cut-off portion of the ring member is not continuous. Therefore, ensure that the connection between the cylinder and Can be sealed.

[Brief explanation of drawings]

FIG. 1 is a side view showing the structure of a seal ring according to a first embodiment of the invention.

FIG. 2 is a plan view showing the structure of the seal ring according to the first embodiment.

FIG. 3 is a sectional view showing how the seal ring according to the first embodiment is used.

FIG. 4 is a side view showing the structure of a seal ring according to a second embodiment of the invention.

FIG. 5 is a plan view showing the structure of a seal ring according to a second embodiment.

FIG. 6 is a side view showing the structure of a conventional piston ring.

FIG. 7 is a side view showing the structure of a conventional piston ring.

FIG. 8 is a sectional view showing a state in which a conventional piston ring is used.

[Explanation of symbols]

1, 11... Seal ring 2, 3, 12, 13...Ring member 2a, 3a, 12a, 13a, 21c...outer peripheral surface 2b, 3b, 12b, 13b...one end surface 2c, 3c, 12c, 13c...Other end surface 2d, 3d, 12d, 13d, 21a...separation part 4, 22...piston 4a, 22a...Ring groove 5, 23... cylinder 5a...Inner wall surface 21... Piston ring 21b...Both end faces

Claims (1)

[Scope of utility model registration request] Claim 1: Separation parts (2d, 3d, 12d, 13
A seal ring (1, 11) composed of a pair of ring members (2, 3, 12, 13) imparted with radial elasticity by d), wherein each ring member (2, 3, 12,
13) has an end surface (2c, 3c, 12c, 13c) that is sloped with respect to one end surface (2b, 3b, 12b, 13b) that is perpendicular to the outer peripheral surface (2a, 3a, 12a, 13a),
The other end surface (2c, 3c, 12
A seal ring characterized in that c, 13c) are bevel-joined to each other.