SU934098A1

SU934098A1 - Piston guiding element

Info

Publication number: SU934098A1
Application number: SU802971574A
Authority: SU
Inventors: Станислав Ибрагимович Мустафаев; Юрий Филиппович Пономаренко; Осип Ефимович Хаймзон; Дмитрий Михайлович Орехов; Сергей Николаевич Драгунов; Леонид Михайлович Иванов; Арнольд Михайлович Рагутский; Юрий Георгиевич Бараш
Priority date: 1980-08-07
Filing date: 1980-08-07
Publication date: 1982-06-07

Description

(54) НАПРАВЛЯЮЩИЙ ЭЛЕМЕНТ ПОРШНЯ(54) PISTON GUIDANCE ELEMENT

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Изобретение относитс к машиностроению и может найти применение в силовых цилиндрах, например гидростойках шахтной крепи.The invention relates to mechanical engineering and can be used in power cylinders, such as hydraulic shaft supports.

Известен направл юш.ий элемент поршн из упругого материала, выполненный в виде разрезного кольца пр моугольного сечени , установочна поверхность которого расположена в закрытой канавке поршн , а опорна поверхность контактирует с зеркалом цилиндра 1.A known yushi element of the piston is made of an elastic material, made in the form of a split ring of rectangular cross section, the mounting surface of which is located in the closed groove of the piston, and the supporting surface is in contact with the mirror of cylinder 1.

В процессе эксплуатации в результате износа и старени материала снижаетс усилие прижати элемента к зеркалу ци-. линдра, в результате чего поршень тер ет герметичность.During operation, as a result of wear and aging of the material, the force of pressing the element against the mirror is reduced. lindra, causing the piston to lose tightness.

Цель изобретени - повышение долговечности направл ющего элемента.The purpose of the invention is to increase the durability of the guide element.

Поставленна цель достигаетс тем, что на установочной поверхности со стороны воздействи рабочей среды и по разрезу выполнена канавка, образующа с опорной поверхностью консольную уплотнительную кромку, взаимодействующую с нат гом по зеркалу цилиндра, а в канавке с нат гом по уплотнительной кромке установлен упругий элемент.The goal is achieved by the fact that a mounting groove is formed on the mounting surface on the side of influence of the working medium and along the section;

Причем упругий элемент выполнен в виде замкнутого кольца с выступом, расположенным по разрезу и перекрывающим его ширину .Moreover, the elastic element is made in the form of a closed ring with a protrusion located along the section and overlapping its width.

На фиг. 1 изображен продольный разрезFIG. 1 shows a longitudinal section.

5 цилиндра и поршн с установленным направл ющим элементом; на фиг. 2- разрез А-А на фиг. 1; на фиг. 3 - общий вид направл ющего элемента с частичным разрезом; на фиг. 4 - общий вид направл ющего мента порщн .5 cylinders and pistons with a guiding element installed; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a general view of the guide element with a partial cut; in fig. 4 is a general view of the guide ment.

Claims

The guide element is made of an elastic material, such as plastic, in the form of a ring, 1, having a longitudinal section 2, allowing it to be installed in the groove 3 of the piston 4. The mounting surface 5 of the guide element is in contact with the groove 3, and the supporting surface 6 - with a mirror 7 of the cylinder 8. In the guide element, on the side of the impact with the abrasive particles, i.e. the piston cavity of the cylinder 8, there is a groove 9, which forms a cantilever sealing edge 10 with the supporting surface 6, the outer diameter of which is larger its diameter is cylinder 8. In groove 9 an elastic, for example rubber ring 11 is placed with tension on the outer diameter formed by radial reduction by sealing lip 10. The outer ring 11 is provided with a protrusion 12 placed in a groove made along section 2 overlapping section 2. In the piston 4, there are also installed sealing rings 13. During reciprocating movement of Porsch 4, the guide element ensures its directional movement relative to the cylinder 8 by sliding the bearing element over 6 on the mirror 7 of the cylinder 8. Under the action of the pressure of the working medium, the cantilever sealing edges firmly press against the mirror 7 of the cylinder 8, providing the necessary density of contact, and thereby perform the functions of a wiper (dust seal), preventing the ingress of abrasive particles in the contact between the reference surface, st6 and mirror 7 of cylinder 8 along the entire perimeter, including the cut. By making the sealing edges 10 of the cantilever and elastic properties of the material of the element, the edges 10 are constantly pressed against the cylinder mirror even in the most significant distortions of the shaft 4 relative to the cylinder 8. At the same time, the elastic ring 11 ensures reliable operation of the assembly for the whole service life regardless of the size working fluid pressure. Due to the tension, the ring 11 presses the sealing edge 10 against the mirror of the cylinder 8 even at low pressures of the working medium or when, due to aging of the material (plastic), the sealing edge 10 partially loses its elastic properties. In addition, the ring 11 will play the role of a damper in case of distortions of the piston 4 relative to the cylinder 8 under the conditions of vibration and shock loads. The protrusion 12 overlaps the cut of 2 elements and prevents the ingress of abrasive particles into it. Such an embodiment of the device will improve durability and reliability when working with working fluids containing abrasive particles. Claims. The guide element is made of elastic material, made in the form of a split ring of rectangular cross section, the mounting surface of which is located in the closed groove of the wall, and the supporting surface is in contact with the cylinder mirror, characterized in that in order to increase durability by preventing abrasive particles from falling into the contact between the bearing surface of the guide element and the cylinder mirror, on the mounting surface on the side of the pressure of the working medium and on the section a groove is made, forming a cantilever sealing edge with the supporting surface, which interacts with tension on the cylinder mirror, and an elastic element is installed in the groove with tension on the sealing edge.

2. An element according to claim 1, characterized in that the elastic element is designed as a closed ring with a protrusion located along the section and overlapping its width. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 527556, cl. F 16 J 1/00, 1977.

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