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CN-122014381-A - Valve seat structure of engine cylinder head

CN122014381ACN 122014381 ACN122014381 ACN 122014381ACN-122014381-A

Abstract

The invention discloses a valve seat structure of an engine cylinder head, which belongs to the technical field of valve seats and comprises a cylinder main body, wherein a mounting groove is formed in the cylinder main body, a valve body is arranged on the cylinder main body, the lower end of the valve body is detachably inserted into the mounting groove, a sealing ring for sealing the joint of the valve body and the cylinder main body is arranged in the mounting groove, a groove with a V-shaped cross section is formed in the sealing ring, an annular piece is arranged in the groove, the lower side surface of the annular piece is attached to the inner wall of the groove, and a first annular plate is fixed on the side wall of the valve body. Secondly, the shell fragment design of ring part makes the sealing ring laminate the valve body lateral wall more closely through the extrusion, has further strengthened sealed effect.

Inventors

  • ZHOU QINGLI
  • ZHOU QINGHUA
  • LI CHUNYAN
  • ZHANG SHUYIN
  • LI JINGHU

Assignees

  • 无锡悦鑫工贸有限公司

Dates

Publication Date
20260512
Application Date
20260302

Claims (9)

  1. 1. A valve seat structure of an engine cylinder head, comprising: A cylinder main body (1), wherein an installation groove (101) is formed in the cylinder main body (1); The valve body (2) is arranged on the cylinder main body (1), and the lower end of the valve body (2) is detachably inserted into the mounting groove (101); the sealing ring (3) is arranged in the mounting groove (101), the outer wall of the sealing ring (3) is abutted against the inner wall of the mounting groove (101), and the inner wall of the sealing ring (3) is abutted against the outer wall of the valve body (2) and used for sealing the joint of the valve body (2) and the cylinder main body (1); The sealing ring (3) is provided with a groove (301) with a V-shaped cross section, an annular piece (4) is arranged in the groove (301), the lower side surface of the annular piece (4) is attached to the inner wall of the groove (301), and a first annular plate (5) is fixed on the side wall of the valve body (2); When the valve body (2) is mounted in the mounting groove (101), the first ring plate (5) presses the ring-shaped member (4) downward.
  2. 2. A valve seat structure of an engine cylinder head according to claim 1, characterized in that the ring-shaped member (4) comprises a ring (401), a plurality of U-shaped shrapnel (402) are circumferentially distributed on the ring (401), and gaps are left between adjacent shrapnels (402); the elastic sheet (402) is provided with a bending part close to one end of the valve body (2), the bending part is bent downwards and abuts against the upper surface of the sealing ring (3), and the side wall of the first annular plate (5) is provided with an extrusion wall (501) for extruding the bending end.
  3. 3. A valve seat structure of an engine cylinder head according to claim 2, characterized in that a pressure plate (6) is provided between the sealing ring (3) and the bent end of the spring plate (402).
  4. 4. A valve seat structure for an engine cylinder head according to claim 2, characterized in that the collar (401) is integrally processed with the spring plate (402).
  5. 5. A valve seat structure of an engine cylinder head according to claim 4, characterized in that the ring (401) and the spring plate (402) are fixed in the groove (301) of the sealing ring (3).
  6. 6. A valve seat structure of an engine cylinder head according to claim 1, characterized in that a connecting flange (201) is fixedly connected to the outer wall of the valve body (2), and the first annular plate (5) is fixedly connected to the lower surface of the connecting flange (201).
  7. 7. The valve seat structure of the engine cylinder head according to claim 1, wherein a ring-shaped sinking groove (102) is arranged in the mounting groove (101), one side of the sinking groove (102) is close to the side wall of the valve body (2), and a sealing ring lip (302) is fixedly connected to the inner side of the sealing ring (3); When the sealing ring (3) is mounted in the mounting groove (101), the sealing ring lip (302) is located in the countersink (102).
  8. 8. The valve seat structure of the engine cylinder head according to claim 7, characterized in that a second annular plate (7) for extruding the sealing ring lip (302) into the countersink (102) is fixedly connected to the side wall of the valve body (2), and a bulge (701) is arranged at the bottom of the second annular plate (7); when the valve body (2) is mounted in the mounting groove (101), the projection (701) abuts against the sealing ring lip (302).
  9. 9. A valve seat structure of an engine cylinder head according to claim 8, characterized in that the first ring plate (5) and the second ring plate (7) are fixedly mounted inside the valve body (2) by bolts.

Description

Valve seat structure of engine cylinder head Technical Field The invention relates to a valve seat structure of an engine cylinder head, and belongs to the technical field of valve seats. Background During engine operation, the valve body structure of the cylinder head plays a key role in the performance and stability of the engine. The tightness of the joint of the valve body and the cylinder main body directly influences the air inlet and exhaust efficiency and the combustion effect of the engine. If the seal is not good, gas leakage can be caused, engine power is reduced, fuel consumption is increased, and even engine faults are caused. Accordingly, a valve seat structure for an engine cylinder head is proposed. Disclosure of Invention Aiming at the technical defects, the invention aims to provide a valve seat structure of an engine cylinder head, which is used for realizing efficient sealing of the joint of a valve body and a cylinder main body. In order to solve the technical problems, the invention provides a valve seat structure of an engine cylinder head, which comprises the following technical scheme: the cylinder body is provided with an installation groove; the valve body is arranged on the cylinder main body, and the lower end of the valve body is detachably inserted into the mounting groove; the sealing ring is arranged in the mounting groove, the outer wall of the sealing ring is abutted against the inner wall of the mounting groove, and the inner wall of the sealing ring is abutted against the outer wall of the valve body and used for sealing the joint of the valve body and the cylinder main body; The sealing ring is provided with a groove with a V-shaped cross section, an annular piece is arranged in the groove, the lower side face of the annular piece is attached to the inner wall of the groove, and a first annular plate is fixed on the side wall of the valve body; When the valve body is mounted in the mounting groove, the first annular plate presses the annular member downward. Preferably, the ring-shaped member comprises a ring, a plurality of U-shaped elastic pieces are circumferentially distributed on the ring, and gaps are reserved between the adjacent elastic pieces; the elastic sheet is provided with a bending part close to one end of the valve body, the bending part is bent downwards and abuts against the upper surface of the sealing ring, and the side wall of the first annular plate is provided with an extrusion wall for extruding the bending end. Preferably, a pressing plate is arranged between the sealing ring and the bending end of the elastic sheet. Preferably, the ring and the elastic sheet are integrally processed. Preferably, the ring and the spring are fixed in the groove of the sealing ring. Preferably, the outer wall of the valve body is fixedly connected with a connecting flange, and the first annular plate is fixedly connected to the lower surface of the connecting flange. Preferably, a ring-shaped sinking groove is arranged in the mounting groove, one side of the sinking groove is close to the side wall of the valve body, and a sealing ring lip is fixedly connected to the inner side of the sealing ring; When the seal ring is installed into the mounting groove, the seal ring lip is in the countersink. Preferably, a second annular plate for extruding the sealing ring lip into the sinking groove is fixedly connected to the side wall of the valve body, and a bulge is arranged at the bottom of the second annular plate; When the valve body is mounted in the mounting groove, the projection abuts against the sealing ring lip. Preferably, the first ring plate and the second ring plate are fixedly installed inside the valve body through bolts. Compared with the prior art: 1. According to the invention, the first annular plate and the annular piece apply an acting force to the sealing ring so as to generate deformation in three directions, and the inner wall and the outer wall of the sealing ring respectively tightly abut against the outer wall of the valve body and the inner wall of the mounting groove to form primary sealing. Secondly, the shell fragment design of ring part makes the sealing ring laminate the valve body lateral wall more closely through the extrusion, has further strengthened sealed effect. 2. According to the invention, a sealing line is formed by matching the sealing ring lip with the sinking groove and the second ring plate bulge. The multiple sealing designs cooperate with each other, so that gas leakage is effectively avoided, and the sealing performance of the engine is obviously improved, thereby improving the air inlet and exhaust efficiency of the engine, enhancing the combustion effect, reducing the fuel consumption and improving the overall performance of the engine. 3. According to the invention, the sealing ring is placed in the mounting groove, then the lower end of the valve body is inserted into the mounting groove, and the connecting flange is