Three-roller crusher adjusting support hydraulic cylinder
Patent Information
- Application Number
- CN202521531891.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-22
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-07-22
AI Technical Summary
[0003]为了克服现有的缸底或缸盖与缸筒对接口的连接方式多为螺纹连接，密封性不佳，一方面造成液压油的损耗浪费，另一方面增大后期的维护难度的问题，本实用新型提供一种三辊破碎机调节支撑液压油缸；缸底与缸筒、缸盖与缸筒的连接处均采用了三级密封结构，有效防止了漏油问题的发生，减少了液压油的损耗浪费，同时也降低了后期的维护难度，活塞与缸筒内壁、活塞杆套与活塞的连接处均设置了密封圈和密封格来圈，进一步提高了油缸的密封性和稳定性
缸底与缸筒、缸盖与缸筒的连接处均采用了三级密封结构，有效防止了漏油问题的发生，减少了液压油的损耗浪费，同时也降低了后期的维护难度，活塞与缸筒内壁、活塞杆套与活塞的连接处均设置了密封圈和密封格来圈，进一步提高了油缸的密封性和稳定性，缸底和缸盖上的进油口和出油口设计合理，方便了液压油的进出，同时也便于对油缸进行维护和保养，缸底和缸盖通过紧固螺栓安装在缸筒两端的支架上，在设备的安装和维护过程中，可以快速地完成缸底和缸盖的安装和拆卸，提高了工作效率。
Smart Images
Figure CN224742653U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of hydraulic cylinder technology, specifically relating to an adjustable support hydraulic cylinder for a three-roll crusher. Background Technology
[0002] The adjustable support hydraulic cylinder of a three-roll crusher is one of its key components. It is mainly used for dynamic adjustment and mechanical support during equipment operation. The cylinder actively shares the crushing force during the crushing process, reducing the load on the frame and extending the equipment's lifespan. The existing connection method between the cylinder bottom or cylinder head and the cylinder barrel is mostly threaded connection. Due to the lack of a good oil leakage prevention structure, the connection is not well sealed, so oil leakage is very likely to occur at the connection. This causes the loss and waste of hydraulic oil on the one hand, and increases the difficulty of later maintenance on the other hand. Utility Model Content
[0003] To overcome the problems of existing cylinder bottom or cylinder head and cylinder barrel connection methods that are mostly threaded connections with poor sealing, resulting in hydraulic oil loss and waste, and increasing the difficulty of later maintenance, this utility model provides a three-roll crusher adjustment support hydraulic cylinder. The connection between the cylinder bottom and cylinder barrel, and between the cylinder head and cylinder barrel, adopt a three-stage sealing structure, which effectively prevents oil leakage, reduces hydraulic oil loss and waste, and also reduces the difficulty of later maintenance. Sealing rings and sealing grids are set at the connection between the piston and the inner wall of the cylinder barrel, and between the piston rod sleeve and the piston, further improving the sealing performance and stability of the cylinder.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: A hydraulic cylinder for adjusting support of a three-roll crusher mainly includes a cylinder barrel, a cylinder bottom, a cylinder head, a piston, a support ring, a piston rod sleeve, a piston rod, and a pressure ring. The cylinder barrel has a hollow internal structure, with supports at both ends. The cylinder bottom is mounted on the supports by fastening bolts and is located at one end of the cylinder barrel. The cylinder head is mounted on the supports by fastening bolts and is located at the other end of the cylinder barrel. A three-stage sealing structure is provided at the connection between the cylinder bottom and the cylinder barrel, consisting of an O-ring, a Gryphon ring, and an anti-extrusion retaining ring from the inside out. The cylinder head and cylinder barrel use the same sealing configuration. The piston is installed inside the hollow structure of the cylinder barrel through the support ring. The piston will... The cylinder is divided into a rodless chamber and a rod chamber. The piston rod sleeve is installed at the center of the piston. Sealing rings and sealing grid rings are provided at the connection between the piston and the inner wall of the cylinder, and at the connection between the piston rod sleeve and the piston. The piston rod passes through the cylinder head and is threadedly connected to the piston rod sleeve inside the cylinder. A guide ring, a sealing ring support ring, and a V-shaped sealing ring are provided at the connection between the outer wall of the piston rod and the inner wall of the cylinder head. The pressure ring is installed on the cylinder head by fastening bolts and extends to the connection between the outer wall of the piston rod and the inner wall of the cylinder head. A first oil inlet and a first oil outlet are provided on the bottom of the cylinder, which are connected to the rodless chamber. A second oil inlet and a second oil outlet are provided on the cylinder, which are connected to the rod chamber.
[0005] The cylinder bottom and cylinder head are both equipped with mounting plates, and mounting holes are provided on the mounting plates.
[0006] The O-rings and Glycols mentioned are made of fluororubber.
[0007] The guide ring is made of a bronze powder impregnated polytetrafluoroethylene composite material.
[0008] The cylinder bottom and cylinder head are provided with exhaust channels. The exhaust channel at the cylinder bottom is connected to the rodless chamber, and the exhaust channel at the cylinder head is connected to the rod chamber. An exhaust plug is installed on the exhaust channel, and an exhaust plug core is installed at the center of the exhaust plug.
[0009] The beneficial effects of this utility model are: The connections between the cylinder bottom and cylinder barrel, and between the cylinder head and cylinder barrel, all employ a three-stage sealing structure, effectively preventing oil leakage, reducing hydraulic oil loss and waste, and lowering the difficulty of later maintenance. Sealing rings and sealing grids are installed at the connections between the piston and the cylinder barrel inner wall, and between the piston rod sleeve and the piston, further improving the cylinder's sealing performance and stability. The oil inlet and outlet ports on the cylinder bottom and cylinder head are rationally designed, facilitating the entry and exit of hydraulic oil and simplifying cylinder maintenance. The cylinder bottom and cylinder head are mounted on supports at both ends of the cylinder barrel using fastening bolts, allowing for quick installation and disassembly of the cylinder bottom and cylinder head during equipment installation and maintenance, thus improving work efficiency. Attached Figure Description
[0010] Figure 1 This is an isometric schematic diagram of the present invention.
[0011] Figure 2 This is a three-dimensional schematic diagram of the present invention.
[0012] Figure 3 This is a partial cross-sectional view of the present invention.
[0013] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.
[0014] Figure 5 yes Figure 3 A magnified view of a section at point B in the middle.
[0015] Figure 6 yes Figure 3 A magnified view of a section at point C. Detailed Implementation
[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.
[0017] This utility model discloses an adjustable support hydraulic cylinder for a three-roll crusher. The adjustable support hydraulic cylinder mainly includes a cylinder barrel 1, a cylinder bottom 2, a cylinder cover 3, a piston 4, a support ring 5, a piston rod sleeve 6, a piston rod 7, and a pressure ring 8. The cylinder barrel 1 has a hollow internal structure. Supports 11 are provided at both ends of the cylinder barrel 1. The cylinder bottom 2 is mounted on the support 11 by fastening bolts and is located at one end of the cylinder barrel 1. The cylinder cover 3 is mounted on the support 11 by fastening bolts and is located at the other end of the cylinder barrel 1. A three-stage sealing structure is provided at the connection between the cylinder bottom 2 and the cylinder barrel 1, consisting of an O-ring 211, a Gryphon ring 212, and an anti-extrusion retaining ring 213 from the inside out. The cylinder cover 3 uses the same sealing configuration at the connection with the cylinder barrel 1. The piston 4 is installed inside the hollow structure of the cylinder barrel 1 through the support ring 5. The piston 4 divides the interior of the cylinder barrel 1 into a hollow section. The piston rod chamber 22 and the rod chamber 23 are provided. The piston rod sleeve 6 is installed at the center of the piston 4. The connection between the piston 4 and the inner wall of the cylinder 1, and the connection between the piston rod sleeve 6 and the piston 4 are provided with sealing rings 41 and sealing rings 42. The piston rod 7 passes through the cylinder head 3 and is threadedly connected to the piston rod sleeve 6 inside the cylinder 1. The connection between the outer wall of the piston rod 7 and the inner wall of the cylinder head 3 is provided with a guide ring 71, a sealing ring support ring 72, and a V-shaped sealing ring 73. The pressure ring 8 is installed on the cylinder head 3 by fastening bolts. The pressure ring 8 extends to the connection between the outer wall of the piston rod 7 and the inner wall of the cylinder head 3. The cylinder bottom 2 is provided with a first oil inlet 24 and a first oil outlet 25, which are connected to the rodless chamber 22. The cylinder 1 is provided with a second oil inlet 12 and a second oil outlet 13, which are connected to the rod chamber 23.
[0018] The hydraulic cylinder is installed in the corresponding position of the three-roll crusher through the mounting hole 311 to realize the adjustment and support function of the crusher. During the crushing process, the hydraulic cylinder actively shares the crushing force, reduces the load on the frame and extends the service life of the equipment. When the hydraulic system injects hydraulic oil into the rodless chamber 22 through the first oil inlet 24, due to the pressure of the hydraulic oil, the piston 4 begins to move towards the rod chamber 23 in the cylinder 1. The hydraulic oil in the rod chamber 23 is discharged through the second oil outlet 13. During the movement of the piston 4, the support ring 5 plays a supporting and guiding role, ensuring that the piston 4 slides smoothly in the cylinder 1. Meanwhile, the sealing rings 41 and 42 at the connection between piston 4 and the inner wall of cylinder 1, and at the connection between piston rod sleeve 6 and piston 4, prevent hydraulic oil from leaking from these parts, ensuring the sealing performance and working efficiency of the hydraulic system. When the hydraulic system injects hydraulic oil into the rod chamber 23 through the second oil inlet 12, the hydraulic oil pushes piston 4 towards the rodless chamber 22. The hydraulic oil in the rodless chamber 22 is discharged through the first oil outlet 25. Piston rod 7 extends and retracts with the movement of piston 4, realizing the dynamic adjustment function of the cylinder. During the movement of piston rod 7, the guide ring 71 at the connection between its outer wall and the inner wall of cylinder head 3 is made of bronze powder impregnated polytetrafluoroethylene composite material, which plays a guiding role and reduces friction, ensuring the smooth movement of piston rod 7. At the same time, the sealing ring support ring 72 and V-shaped sealing ring 73 prevent hydraulic oil from leaking from the gap between piston rod 7 and cylinder head 3. The pressure ring 8 is mounted on the cylinder head 3 by fastening bolts, further enhancing the sealing performance of this part. A three-stage sealing structure is provided at the connection between the cylinder bottom 2 and the cylinder barrel 1, consisting of an O-ring 211, a Glyd ring 212, and an anti-extrusion retaining ring 213 from the inside out. The O-ring 211 and Glyd ring 212 are made of fluororubber, possessing excellent sealing performance and oil resistance, effectively preventing hydraulic oil leakage from the connection between the cylinder bottom 2 and the cylinder barrel 1. The anti-extrusion retaining ring 213 protects the sealing ring, preventing it from being squeezed out under high pressure. The connection between the cylinder head 3 and the cylinder barrel 1 uses the same sealing configuration, ensuring the sealing performance of this part as well.
[0019] like Figure 1 , Figure 2 As shown, mounting plates 31 are provided on both the cylinder bottom 2 and the cylinder cover 3, and mounting holes 311 are provided on the mounting plates 31. The hydraulic cylinder can be installed in the corresponding position of the three-roll crusher through the mounting holes 311 to realize the adjustment and support function of the crusher. During the crushing process, the hydraulic cylinder actively shares the crushing force, reduces the load on the frame and extends the service life of the equipment.
[0020] The O-ring 211 and Glyd ring 212 are made of fluororubber. The O-ring 211 and Glyd ring 212 are made of fluororubber, which has good sealing performance and oil resistance, and can effectively prevent hydraulic oil from leaking from the connection between the cylinder bottom 2 and the cylinder barrel 1. The anti-extrusion retaining ring 213 plays the role of protecting the sealing ring and preventing it from being squeezed out under high pressure.
[0021] The guide ring 71 is made of bronze powder impregnated polytetrafluoroethylene composite material; it serves to guide and reduce friction, ensuring the smooth movement of the piston rod 7.
[0022] like Figure 3 , Figure 5 As shown, exhaust channels 32 are provided on the cylinder bottom 2 and cylinder head 3. The exhaust channel 32 of the cylinder bottom 2 is connected to the rodless chamber 22, and the exhaust channel 32 of the cylinder head 3 is connected to the rod chamber 23. An exhaust plug 9 is installed on the exhaust channel 32, and an exhaust plug core 10 is installed at the center of the exhaust plug 9. During operation, air may be mixed into the hydraulic oil. The presence of air will increase the compressibility of the hydraulic oil, leading to unstable operation. Through the exhaust channel 32, the air mixed into the rodless chamber 22 and the rod chamber 23 can be discharged in time, ensuring the purity of the hydraulic oil, making the operation more stable, and avoiding problems such as pressure fluctuation and inaccurate action. After the air is discharged, because there is no buffering effect of air, the hydraulic oil can transmit pressure more quickly, making the movement of the piston 4 more sensitive, thereby improving the dynamic adjustment performance of the hydraulic cylinder of the three-roll crusher adjustment support and better adapting to various working conditions during the crushing process.
[0023] Work process: I. Hydraulic Drive and Piston Movement 1. Oil injection stage Rodless chamber 22 drive: When high-pressure hydraulic oil is introduced into the first oil inlet 24, the oil enters the rodless chamber 22 through the cylinder bottom 2. At this time, the rod chamber 23 discharges oil through the second oil outlet 13, forming a pressure difference that pushes the piston 4 to move towards the cylinder head 3, causing the piston rod 7 to extend outward.
[0024] Rod chamber 23 drive: When high-pressure oil is introduced into the second oil inlet 12, the oil enters the rod chamber 23 through the cylinder 1. At this time, the rodless chamber 22 discharges oil through the first oil outlet 25, and the pressure difference pushes the piston 4 to move towards the cylinder bottom 2, and the piston rod 7 retracts into the cylinder.
[0025] 2. Motion-guided control The guide ring 71 on the outer wall of the piston rod 7 is precisely fitted with the inner wall of the cylinder head 3 to achieve low-friction guidance during the extension and retraction process. The support ring 5 axially constrains the movement trajectory of the piston 4 to ensure that the piston movement axis coincides with the center line of the cylinder 1.
[0026] II. Multi-level sealing protection mechanism 1. Static sealing system The cylinder bottom / cylinder head and cylinder barrel interface adopt a three-level sealing structure: the first level of sealing: O-ring 211 (fluororubber) provides initial elastic sealing; the second level of sealing: Gryllium ring 212 (fluororubber) forms the main sealing interface; and the third level of protection: anti-compression retaining ring 213 prevents the seal from deforming under high pressure.
[0027] 2. Dynamic sealing system The piston rod dynamic seal adopts a composite configuration: the V-ring seal 73 achieves bidirectional pressure sealing, the seal ring support ring 72 prevents excessive deformation of the V-ring, and the pressure ring 8 provides continuous clamping force through bolt pre-tightening.
[0028] III. Mechanical Support and Failure Protection 1. Multi-dimensional support structure Radial support: The piston rod sleeve 6 and piston 4 form a rigid connection through an interference fit (0.02-0.05mm); Axial support: Bracket 11 adopts a welded structure of Q345B steel plate and can withstand an axial load of 300kN.
[0029] 2. Failure Protection Mechanism The dual-redundant sealing design ensures that the system can still function even if a single point seal fails. After the failure of the Glyd ring 212, the combination of the O-ring 21 and the anti-extrusion retaining ring 213 can still maintain a short-term seal. The V-ring 73 adopts a three-lip structure, which can maintain a basic seal even if a single lip is damaged, thus reducing the leakage rate of traditional threaded connection structures.
[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.
Claims
1. A hydraulic cylinder for adjusting the support of a three-roll crusher, characterized in that: The aforementioned three-roll crusher adjustable support hydraulic cylinder includes a cylinder barrel (1), a cylinder bottom (2), a cylinder cover (3), a piston (4), a support ring (5), a piston rod sleeve (6), a piston rod (7), and a pressure ring (8). The cylinder barrel (1) has a hollow internal structure, and supports (11) are provided at both ends of the cylinder barrel (1). The cylinder bottom (2) is mounted on the supports (11) by fastening bolts and is located at one end of the cylinder barrel (1). The cylinder cover (3) is mounted on the supports (11) by fastening bolts. Located at the other end of the cylinder (1), the cylinder bottom (2) is provided with a three-stage sealing structure at the connection between the cylinder (1) and the cylinder (1), consisting of an O-ring (211), a Gryphon ring (212), and an anti-extrusion retaining ring (213) from the inside out. The cylinder head (3) is connected to the cylinder (1) with the same sealing configuration. The piston (4) is installed inside the cavity structure of the cylinder (1) through a support ring (5). The piston (4) divides the inside of the cylinder (1) into a rodless chamber (22) and a rod chamber (23). The piston rod sleeve ( 6) Installed at the center of piston (4), sealing rings (41) and sealing rings (42) are provided at the connection between piston (4) and the inner wall of cylinder (1) and at the connection between piston rod sleeve (6) and piston (4). Piston rod (7) passes through cylinder head (3) and is threadedly connected to piston rod sleeve (6) inside cylinder (1). Guide ring (71), sealing ring support ring (72), and V-shaped sealing ring (73) are provided at the connection between outer wall of piston rod (7) and inner wall of cylinder head (3). Pressure ring (8) is connected to piston rod sleeve (6) inside cylinder (1). The cylinder head (3) is installed with fastening bolts. The pressure ring (8) extends to the connection between the outer wall of the piston rod (7) and the inner wall of the cylinder head (3). The cylinder bottom (2) is provided with a first oil inlet (24) and a first oil outlet (25). The first oil inlet (24) and the first oil outlet (25) are connected to the rodless chamber (22). The cylinder barrel (1) is provided with a second oil inlet (12) and a second oil outlet (13). The second oil inlet (12) and the second oil outlet (13) are connected to the rod chamber (23).
2. The hydraulic cylinder for adjusting the support of a three-roll crusher as described in claim 1, characterized in that: The cylinder bottom (2) and cylinder head (3) are both provided with mounting plates (31), and mounting holes (311) are provided on the mounting plates (31).
3. A hydraulic cylinder for adjusting the support of a three-roll crusher as described in claim 1 or 2, characterized in that: The O-ring (211) and Glycol (212) are made of fluororubber.
4. A hydraulic cylinder for adjusting the support of a three-roll crusher as described in claim 1 or 2, characterized in that: The guide ring (71) is made of bronze powder impregnated polytetrafluoroethylene composite material.
5. A hydraulic cylinder for adjusting the support of a three-roll crusher as described in claim 1 or 2, characterized in that: The cylinder bottom (2) and cylinder head (3) are provided with exhaust channels (32). The exhaust channel (32) of the cylinder bottom (2) is connected to the rodless chamber (22), and the exhaust channel (32) of the cylinder head (3) is connected to the rod chamber (23). An exhaust plug (9) is installed on the exhaust channel (32), and an exhaust plug core (10) is installed at the center of the exhaust plug (9).