Hydraulic cavity self-adaptive split pressure-bearing device
Through the hydraulic chamber adaptive split pressure bearing device, the split keys and fastening bolts are used to jointly bear pressure, and through the adaptive distribution of the elastic pad ring, the problem of insufficient pressure bearing in the hydraulic chamber in the prior art under high pressure environment is solved, and efficient hydraulic chamber pressure bearing and pressure distribution is achieved.
Patent Information
- Application Number
- CN202411904537.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-03-21
AI Technical Summary
The existing hydraulic chamber pressure bearing devices cannot meet the strength and dimensional requirements under high pressure environments, resulting in the inability to effectively bear pressure on the fastening bolts.
An adaptive split pressure bearing device for hydraulic chambers is designed, which can jointly bear pressure by split clamping keys and fastening bolts, and the adaptive distribution of pressure in the hydraulic chamber is achieved by using the rapid elastic deformation of the clamping key elastic pad ring and the supporting ring elastic pad ring.
It realizes effective pressure bearing on the hydraulic chamber under a high-pressure environment, avoids gap interference caused by processing and assembly, and accurately distributes the hydraulic chamber pressure.
Smart Images
Figure CN119664747A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of hydraulic cavity pressure bearing, and specifically relates to a hydraulic cavity self-adaptive split pressure bearing device which can realize efficient pressure bearing of high-pressure medium in the hydraulic cavity and provide long-term stable pressure bearing capacity. Background Art
[0002] The hydraulic cavity is an important actuator in the hydraulic system, responsible for converting the liquid energy in the hydraulic system into mechanical force to achieve various actions and motion control in engineering and industrial applications. The pressure bearing and sealing performance of the hydraulic cavity is one of the key factors to ensure the normal operation of the system. In the hydraulic system, the hydraulic cavity is subjected to the force of high-pressure liquid. Therefore, the hydraulic cavity and the hydraulic cavity sealing system must have sufficient strength and rigidity to withstand this pressure without rupture or deformation, and ensure that the system can continue to operate without external interference.
[0003] The existing hydraulic cavity pressure-bearing mainly relies on the outer side of the hydraulic cavity cover to be connected and fixed to the hydraulic cavity through fastening bolts. Such a structure can achieve its pressure-bearing performance for a hydraulic cavity of small size and conventional pressure. However, when the liquid cavity is subjected to high pressure, the existing end face bolt fastening scheme has insufficient fastening force and the material strength cannot meet the pressure-bearing requirements of the liquid cavity sealing surface. Summary of the invention
[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a hydraulic cavity adaptive split pressure-bearing device that can effectively solve the deficiency of single bolt pressure-bearing under ultra-high pressure and improve the adaptability and stability of the system through adaptive pressure distribution.
[0005] The object of the present invention is achieved in this way: a hydraulic cavity adaptive split pressure-bearing device, comprising a hydraulic cavity with a left-side pressure hole and a right-side pressure hole of the hydraulic cavity, a piston rod installed in the hydraulic cavity, a sealing groove body arranged between the piston rod and the hydraulic cavity, a piston sealing ring arranged between the hydraulic cavity and the piston rod, a sealing groove static seal arranged between the sealing groove body and the hydraulic cavity, and a sealing groove dynamic seal arranged between the sealing groove body and the piston rod, the sealing groove body is installed on the sealing groove body mounting step hole at the blocking end of the hydraulic cavity, the sealing groove static seal is installed on the outer side of the sealing groove body, and the sealing groove dynamic seal is installed on the inner side of the sealing groove body; a hydraulic cavity key slot is opened on the outer side of the sealing groove body mounting step hole, and a hydraulic cavity key slot is opened on the outer side of the hydraulic cavity key slot. A key elastic gasket is installed on the axial inner side of the key slot, and a support ring elastic gasket is installed on the axial outer side of the hydraulic cavity key slot on the key elastic gasket. The key elastic gasket and the support ring elastic gasket are made of high elasticity and high strength material, and the support ring elastic gasket is installed on the radial inner side of the key elastic gasket; a split key consisting of six circular arc rings is also provided on the key elastic gasket and the support ring elastic gasket, and a single split key ring is installed into the axial outer side of the hydraulic cavity key slot through the gap between the sealing groove body and the hydraulic cavity, and the six split keys are reassembled into a circular ring after being installed into the hydraulic cavity key slot, and a support ring is installed on the radial inner side of the split key, and the hydraulic cavity cover is installed on the hydraulic cavity by fastening bolts, and is pressed on the support ring and the split key.
[0006] The sealing groove body mounting step hole is arranged on the inner wall of the hydraulic cavity, and a hydraulic cavity key groove is arranged between the sealing groove body mounting step hole and the end surface of the hydraulic cavity.
[0007] The above-mentioned structural cavity is a single-sided structure, or two symmetrical single-sided structures.
[0008] Compared with the existing technology, the present invention has the following beneficial effects: 1. The split key and the fastening bolts can bear the pressure of the hydraulic chamber together, which solves the problem that the fastening bolts alone cannot meet the requirements of ultra-high hydraulic chamber pressure fastening and sealing.
[0009] 2. The rapid elastic deformation of the key elastic gasket and the support ring elastic gasket can realize the adaptive distribution of the pressure in the hydraulic cavity, avoiding the interference of the gap caused by processing and assembly on the distribution of the pressure in the hydraulic cavity.
[0010] 3. By adjusting the inner diameter of the support ring, the pressure-bearing area of the split key and the support ring is changed, thereby accurately distributing the hydraulic cavity pressure to the split key and the support ring. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is an assembly diagram of the hydraulic chamber of the present invention.
[0012] Figure 2 It is a schematic diagram of the structure of the hydraulic cavity of the present invention.
[0013] Figure 3 It is an assembly diagram of the split card key of the present invention.
[0014] Figure 4 It is a structural schematic diagram of the split card key of the present invention.
[0015] Figure 5 The key elastic gasket and the support ring elastic gasket of the present invention are in a non-pressure-bearing state.
[0016] Figure 6 It is a partial enlarged view of the key elastic gasket and the support ring elastic gasket of the present invention in the unpressured state.
[0017] Figure 7 This is the pressure-bearing state of the key elastic gasket and the support ring elastic gasket of the present invention.
[0018] Figure 8 This is a partial enlarged view of the key elastic gasket and the support ring elastic gasket under pressure of the present invention.
[0019] Wherein: 1. piston rod, 2. hydraulic chamber, 3. sealing groove, 4. split key, 5. support ring, 6. hydraulic chamber cover, 7. fastening bolts, 8. piston sealing ring, 9. sealing groove static seal, 10. sealing groove dynamic seal, 11. key elastic gasket, 12 support ring elastic gasket, 201. punching hole on the left side of hydraulic chamber, 202. punching hole on the right side of hydraulic chamber, 203. sealing groove installation step hole, 204. hydraulic chamber key slot. DETAILED DESCRIPTION
[0020] like Figure 1 , 2As shown in , 3, a hydraulic cavity self-adaptive split pressure-bearing device comprises a hydraulic cavity 2 with a left pressure hole 201 of the hydraulic cavity and a right pressure hole 202 of the hydraulic cavity, a piston rod 1 installed in the hydraulic cavity 2, a sealing groove 3 arranged between the piston rod 1 and the hydraulic cavity 2, a piston sealing ring 8 arranged between the hydraulic cavity 2 and the piston rod 1, a sealing groove static seal 9 arranged between the sealing groove 3 and the hydraulic cavity 2, a sealing groove dynamic seal 10 arranged between the sealing groove 3 and the piston rod 1, and the sealing groove 3 is installed in the sealing groove installation step hole 2 at the blocking end of the hydraulic cavity 2. 03, the sealing groove static seal 9 is installed on the outer side of the sealing groove body 3, and the sealing groove dynamic seal 10 is installed on the inner side of the sealing groove body 3; a hydraulic cavity key groove 204 is opened on the outer side of the sealing groove body mounting step hole 203, a key elastic gasket 11 is installed on the axial inner side of the hydraulic cavity key groove 204, and a support ring elastic gasket 12 is installed on the axial outer side of the hydraulic cavity key groove 204 on the key elastic gasket 11. The key elastic gasket 11 and the support ring elastic gasket 12 are made of high elasticity and high strength material, and the support ring elastic gasket 12 is installed on the radial inner side of the key elastic gasket 11.
[0021] like Figure 1 , 2 As shown in Figures 3 and 4, a split key 4 consisting of six arc rings is also provided on the key elastic gasket 11 and the support ring elastic gasket 12. A single split key ring is installed into the axial outer side of the hydraulic cavity key groove 204 through the gap between the sealing groove body 3 and the hydraulic cavity 2. After the six split keys are installed into the hydraulic cavity key groove 204, they are reorganized into a circular ring. A support ring 5 is installed on the radial inner side of the split key 4. The hydraulic cavity cover 6 is installed on the hydraulic cavity 2 by fastening bolts 7 and is pressed against the support ring 5 and the split key 4.
[0022] like Figure 2 , 3 As shown, the sealing groove mounting step hole 203 is arranged on the inner wall of the hydraulic cavity 2, and a hydraulic cavity key slot 204 is arranged between the sealing groove mounting step hole 203 and the end surface of the hydraulic cavity 2. The above-mentioned structure cavity is a single-sided structure, or two symmetrical single-sided structures.
[0023] like Figure 5 , 6As shown in , 7 and 8, a hydraulic cavity adaptive split pressure-bearing device includes a piston rod 1, a hydraulic cavity 2, a sealing groove body 3, a split key 4, a support ring 5, a hydraulic cavity cover 6, a fastening bolt 7, a piston sealing ring 8, a sealing groove static seal 9, a sealing groove dynamic seal 10, a key elastic gasket 11, and a support ring elastic gasket 12; the piston rod 1 is installed in the hydraulic cavity 2, the piston sealing ring 8 is installed on the inner side of the hydraulic cavity in contact with the piston rod, and the outer side of the piston rod 1 in contact with the hydraulic cavity 2, the sealing groove body 3 is installed on the sealing groove body installation step hole at the blocking end of the hydraulic cavity 2, and the sealing groove static seal 9 is installed on the outer side of the sealing groove body The dynamic seal 10 of the sealing groove is installed on the inner side of the sealing groove body. The key elastic gasket 11 is made of high elasticity and high strength material and is installed on the axial inner side of the hydraulic cavity key groove 204. The split key 4 is composed of six arc rings. A single split key ring is installed into the axial outer side of the hydraulic cavity key groove 204 through the gap between the sealing groove body and the liquid cavity. After the six split keys are installed into the hydraulic cavity key groove 204, they are re-formed into a circular ring. The support ring elastic gasket is made of high elasticity and high strength material and is installed on the radial inner side of the key elastic gasket. The support ring is installed on the radial inner side of the split key. The hydraulic cavity cover is installed on the hydraulic cavity by fastening bolts.
[0024] A punching hole is arranged on the side of the hydraulic cavity, a sealing groove body installation step hole is arranged on the inner wall of the hydraulic cavity, and a key groove is arranged between the sealing groove body installation step hole and the end face of the hydraulic cavity.
[0025] The method of using the above-mentioned hydraulic cavity adaptive split pressure-bearing device is as follows: like Figures 1 to 8 As shown, the hydraulic cavity 2 is sealed by the piston sealing ring 8, the sealing groove static seal 9, and the sealing groove dynamic seal 10. The hydraulic cavity 2 is pressurized through the hydraulic cavity pressurizing hole 201, so that the pressure in the hydraulic cavity 2 increases. The increased hydraulic cavity internal pressure acts on the piston on one side to push the piston rod 1 to move upward, and acts on the sealing groove body on the other side to push the sealing groove body to move downward. The sealing groove body moving downward transfers the pressure in the hydraulic cavity to the key elastic gasket 11 and the support ring elastic gasket 12 respectively; the load on the key elastic gasket 11 is further transferred to the split key, and the split key further transfers the load to the hydraulic cylinder body; the load on the support ring elastic gasket 12 is further transferred to the hydraulic cavity cover, and the hydraulic cavity cover further transfers the load to the hydraulic cylinder body through the fastening bolts; the hydraulic cavity internal pressure is borne by the key and the fastening bolts respectively through the split key and the support ring, thereby reducing the force on the fastening bolts, solving the problem that the fastening bolts cannot meet the strength and size requirements under high pressure.
[0026] The key elastic gasket 11 and the support ring elastic gasket 12 are made of high-elasticity and high-strength materials. When distributing the pressure in the hydraulic cavity, the tiny gaps between the key elastic gasket 11, the support ring elastic gasket 12, the split key 4 and the support ring 5 will affect the distribution of the hydraulic cavity pressure. At this time, the rapid elastic deformation of the key elastic gasket 11 and the support ring elastic gasket 12 can achieve adaptive distribution of the pressure in the hydraulic cavity, thereby avoiding the gaps caused by processing and assembly interfering with the distribution of the hydraulic cavity pressure.
[0027] The ratio of the pressure areas of the split key 4 and the support ring 5 determines the force ratio of the split key 4 and the fastening bolt. When it is necessary to reduce the force on the fastening bolt and increase the force on the split key, the inner diameter of the support ring is reduced to reduce the bearing area of the support ring, thereby reducing the force transmitted to the fastening bolt by the support ring. According to the demand for force distribution, different inner diameter sizes are adjusted to achieve accurate distribution of the hydraulic cavity pressure.
[0028] The hydraulic cavity carrying the high-pressure fluid medium pushes the piston rod of the hydraulic medium, and the sealing groove body equipped with a sealing ring to prevent the hydraulic medium from leaking from the end face, the split key for bearing the high pressure inside the hydraulic cavity, the inner support ring for supporting the split hydraulic key, the hydraulic cavity cover for blocking the hydraulic cavity, the fastening bolts for fixing the hydraulic cavity cover, the key elastic gasket and the support ring elastic gasket for adaptively distributing the pressure inside the cavity. The advantages are: the split key and the fastening bolts can bear the pressure of the hydraulic cavity together, which solves the problem that the fastening bolts alone cannot meet the requirements of ultra-high hydraulic cavity pressure fastening and sealing; the fast elastic deformation of the key elastic gasket and the support ring elastic gasket can realize the adaptive distribution of the pressure inside the hydraulic cavity, avoiding the gap caused by processing and assembly interfering with the distribution of the hydraulic cavity pressure; by adjusting the inner diameter of the support ring, the pressure bearing area of the split key and the support ring is changed, so as to accurately distribute the hydraulic cavity pressure to the split key and the support ring.
Claims
1. A hydraulic cavity self-adaptive split pressure-bearing device, comprising a hydraulic cavity (2) having a left pressure hole (201) and a right pressure hole (202) of the hydraulic cavity, a piston rod (1) installed in the hydraulic cavity (2), a sealing groove (3) arranged between the piston rod (1) and the hydraulic cavity (2), a piston sealing ring (8) arranged between the hydraulic cavity (2) and the piston rod (1), a sealing groove static seal (9) arranged between the sealing groove (3) and the hydraulic cavity (2), and a sealing groove dynamic seal (10) arranged between the sealing groove (3) and the piston rod (1), characterized in that: The sealing groove body (3) is mounted on the sealing groove body mounting step hole (203) at the blocking end of the hydraulic cavity body (2); the sealing groove static seal (9) is mounted on the outer side of the sealing groove body (3); and the sealing groove dynamic seal (10) is mounted on the inner side of the sealing groove body (3); a hydraulic cavity key groove (204) is provided on the outer side of the sealing groove body mounting step hole (203); a key elastic gasket (11) is mounted on the axial inner side of the hydraulic cavity key groove (204); and a support ring elastic gasket (12) is mounted on the axial outer side of the hydraulic cavity key groove (204) on the key elastic gasket (11); the key elastic gasket (11) and the support ring elastic gasket (12) are made of a high elasticity and high strength material. The support ring elastic gasket (12) is installed on the radial inner side of the key elastic gasket (11); a split key (4) consisting of six circular arc rings is also provided on the key elastic gasket (11) and the support ring elastic gasket (12); a single split key ring is installed into the axial outer side of the hydraulic cavity key slot (204) through the gap between the sealing groove body (3) and the hydraulic cavity (2); the six split keys are installed into the hydraulic cavity key slot (204) to form a circular ring; a support ring (5) is installed on the radial inner side of the split key (4); a hydraulic cavity cover (6) is installed on the hydraulic cavity (2) by means of fastening bolts (7) and is pressed against the support ring (5) and the split key (4).
2. The hydraulic cavity self-adaptive split pressure-bearing device according to claim 1, characterized in that: The sealing groove body mounting step hole (203) is arranged on the inner wall of the hydraulic cavity (2), and a hydraulic cavity key groove (204) is arranged between the sealing groove body mounting step hole (203) and the end surface of the hydraulic cavity (2).
3. The hydraulic cavity self-adaptive split pressure-bearing device according to claim 1, characterized in that: The above-mentioned structural cavity is a single-sided structure, or two symmetrical single-sided structures.