Flushing device
By designing a flushing device, the high-pressure oil pressure of the walking motor is used to overcome the spring force of the valve core, so that the oil on the low-pressure side of the motor is connected, thereby achieving oil flushing and cooling of the closed system components. This solves the problem of seal failure and thermal wear caused by hydraulic oil overheating and improves the system's energy transfer efficiency.
Patent Information
- Application Number
- CN202423319191.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In closed-loop hydraulic systems, the heating of hydraulic oil leads to problems such as softening and failure of seals, thermal wear of components, and high system heat loss, which affects energy transfer efficiency.
Design a flushing device that utilizes the oil pressure from the high-pressure side of the walking motor to enter the flushing device, overcoming the valve core spring force, and allowing the oil from the low-pressure side of the motor to be connected through the T-port, thereby achieving flushing and cooling of the oil inside the closed system components.
It effectively reduces the oil temperature inside closed system components, prevents softening of seals and thermal wear of parts, and improves the system's energy transfer efficiency.
Smart Images
Figure CN223767799U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic closed-loop system technology application, and in particular to a flushing device. Background Technology
[0002] Hydraulic systems can be classified into open hydraulic systems and closed hydraulic systems according to the circulation loop of the hydraulic oil. An open hydraulic system refers to a system where the hydraulic oil circulates among the various hydraulic components before returning to the tank, and then circulates back to the hydraulic components from the tank. In a closed system, the hydraulic oil only circulates between the individual hydraulic components; the hydraulic oil circulating between the components does not pass through the tank.
[0003] Because open-loop systems circulate hydraulic oil through a tank before recirculating to the hydraulic components, they do not suffer from overheating issues. Overheating often leads to problems such as softening and failure of internal seals, thermal wear of internal parts, and high energy consumption throughout the hydraulic system. In contrast, closed-loop systems operate under high pressure, causing the hydraulic oil to compress and flow at high speed, generating heat. Since the high-temperature hydraulic oil only circulates between the hydraulic components without passing through a tank, its cooling effect is poor, a significant inherent drawback. However, because the hydraulic oil in a closed-loop system circulates only between the hydraulic components, its energy transfer efficiency is very high. Therefore, the widespread application of closed-loop systems has been favored by hydraulic engineers, particularly in driving the movement of construction machinery and agricultural machinery.
[0004] According to relevant research, the energy transfer efficiency of closed systems is 70% to 80%, while that of open systems is only 30% to 35%. Given the significant advantage of closed systems in energy transfer efficiency, how to eliminate or reduce the heat generation problem in closed systems during design has become an urgent technical challenge for hydraulic engineers. Utility Model Content
[0005] To address the problems of seal softening and failure, component thermal wear, and high system heat loss caused by high temperature heating of hydraulic oil in existing closed-loop systems, a flushing device is proposed.
[0006] The technical solution of this utility model is as follows: a flushing device, including an adjusting component, a valve body, an oil inlet component, and an oil outlet component; the valve body is provided with an adjusting component and an oil outlet component, and the bottom of the valve body is symmetrically provided with an oil inlet component. The adjusting component and the oil inlet component are connected to each other, and the oil inlet component is connected to the oil outlet component through a cavity inside the valve body.
[0007] Preferably, the adjusting assembly includes a valve core, a first gasket, a first spring, a first O-ring, and a screw plug; the valve core is disposed inside the valve body, and valve core steps are provided at both ends of the valve core; the valve body is provided with valve body steps near the valve core steps; the first gasket is symmetrically sleeved on both ends of the valve core, with one side of the first gasket abutting against the valve core steps and the valve body steps; the first spring is symmetrically sleeved on both ends of the valve core, with one end of the first spring abutting against the other side of the first gasket, and the other end of the first spring away from the first gasket abutting against the screw plug.
[0008] Preferably, the screw plug has a screw plug step on the outside, one end of the screw plug is inserted into the valve body, and the screw plug step abuts against the outside of the valve body; the screw plug has a groove inside, and the other end of the first spring away from the first washer abuts against the end of the groove inside the screw plug.
[0009] Preferably, a first O-ring for sealing is provided at the connection between the screw plug and the valve body.
[0010] Preferably, the oil inlet assembly includes a bottom screw plug, a bottom screw plug step on the outside of the bottom screw plug, one end of the bottom screw plug is inserted into the valve body, and the bottom screw plug step abuts against the outside of the valve body; the bottom screw plug has a through hole for oil inlet inside.
[0011] Preferably, a rectangular ring for sealing is provided at the connection between the bottom plug and the valve body.
[0012] Preferably, the oil outlet assembly includes a cone valve core, a throttling gasket, and a retaining ring; the cone valve core is located inside the valve body, and a recess and a retaining ring groove are formed at the bottom of the inner hole of the cone valve core. The recess is provided with a throttling gasket, and the retaining ring groove is provided with a retaining ring for fixing the throttling gasket.
[0013] Preferably, the outer side of the cone valve core is provided with a shoulder structure, and the inside of the valve body is provided with a second valve body step near the shoulder structure. One side of the shoulder structure abuts against the second valve body step. A second spring is sleeved on one end of the cone valve core. One end of the second spring abuts against the side of the shoulder structure away from the second valve body step. The screw plug is provided with a groove inside. A second gasket is provided at the end of the groove. The end of the second spring away from the shoulder structure abuts against the second gasket.
[0014] Preferably, the top screw plug has a top screw plug step on its outer side, one end of the top screw plug is inserted into the valve body, and the top screw plug step abuts against the outside of the valve body.
[0015] Preferably, a second O-ring for sealing is provided at the connection between the top plug and the valve body.
[0016] The beneficial effects of this utility model are as follows: The flushing device provided by this utility model is essentially controlled by using the oil pressure on the high-pressure side of the walking motor to enter the flushing device, overcoming the valve core spring force, so that the oil on the low-pressure side of the motor is connected at the T port, thereby realizing the flushing and cooling of the oil in the closed system components. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the rinsing device of this utility model;
[0018] Figure 2 This is a schematic diagram illustrating the application of the flushing device of this utility model in a closed system.
[0019] The component names corresponding to the various reference numerals in the diagram are as follows:
[0020] 1. Adjusting assembly; 11. Valve core; 111. Valve core step; 12. First gasket; 13. First spring; 14. First O-ring; 15. Plug; 151. Plug step; 2. Valve body; 21. First valve body step; 22. Second valve body step; 3. Oil inlet assembly; 31. Bottom plug; 311. Bottom plug step; 32. Rectangular ring; 4. Oil outlet assembly; 41. Top plug; 411. Top plug step; 42. Second gasket; 43. Second O-ring; 44. Second spring; 45. Conical valve core; 46. Throttling gasket; 47. Snap ring. Detailed Implementation
[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.
[0022] refer to Figure 1 As shown, this utility model provides a flushing device, including an adjusting component 1, a valve body 2, an oil inlet component 3, and an oil outlet component 4; the adjusting component 1 and the oil outlet component 4 are provided inside the valve body 2, and the oil inlet component 3 is symmetrically provided at the bottom of the valve body 2. The adjusting component 1 and the oil inlet component 3 are connected to each other, and the oil inlet component 3 is connected to the oil outlet component 4 through the cavity inside the valve body 2.
[0023] The adjusting assembly 1 includes a valve core 11, a first gasket 12, a first spring 13, a first O-ring 14, and a screw plug 15. The valve core 11 is located inside the valve body 2, and the cylindrical surface of the valve core 11 is fitted with the inner hole of the valve body 2 with a small clearance, which can both seal the valve core 11 and ensure that the valve core 11 can slide flexibly in the valve body 8. The valve core 11 has valve core steps 111 at both ends, and the valve body 2 has valve body steps 21 near the valve core steps 111. The first gasket 12 is symmetrically sleeved on both ends of the valve core 11, and one side of the first gasket 12 abuts against the valve core steps 111 and the valve body steps 21. Similarly, the first spring 13 is symmetrically sleeved on both ends of the valve core 11, one end of the first spring 13 abuts against the other side of the first gasket 12, and the other end of the first spring 13 away from the first gasket 12 abuts against the screw plug 15. The first gasket 12 and the screw plug 15 respectively support the two ends of the first spring 13.
[0024] The screw plug 15 has a screw plug step 151 on the outside. One end of the screw plug 15 is inserted into the valve body 2, and the screw plug step 151 abuts against the outside of the valve body 2. The screw plug 15 has a groove inside, and the other end of the first spring 13 away from the first washer 12 abuts against the end of the groove inside the screw plug 15.
[0025] A first O-ring 14 for sealing is provided at the connection between the plug 15 and the valve body 2;
[0026] The oil inlet assembly 3 includes a bottom screw plug 31, a bottom screw plug step 311 on the outside of the bottom screw plug 31, one end of the bottom screw plug 31 is inserted into the valve body 2, and the bottom screw plug step 311 abuts against the outside of the valve body 2; the bottom screw plug 31 has an oil inlet through hole inside;
[0027] A rectangular ring 32 for sealing is provided at the connection between the bottom screw plug 31 and the valve body 2;
[0028] The oil outlet assembly 4 includes a top screw plug 41, a second gasket 42, a second O-ring 43, a second spring 44, a cone valve core 45, a throttling gasket 46, and a retaining ring 47. The cone valve core 45 is located inside the valve body 2 and can slide freely. It has an oil passage hole on its side and a small diameter through hole in the center. The bottom of the inner hole has a stepped hole, a recessed groove, and a retaining ring groove. The recessed groove has a throttling gasket 46, and the retaining ring groove has a retaining ring 47 for fixing the throttling gasket 46.
[0029] The outer side of the cone valve core 45 is provided with a shoulder structure 451. The valve body 2 is provided with a second valve body step 22 near the shoulder structure 451. One side of the shoulder structure 451 abuts against the second valve body step 22. The second spring 44 is sleeved on one end of the cone valve core 45. One end of the second spring 44 abuts against the side of the shoulder structure 451 away from the second valve body step 22. The screw plug 41 is provided with a groove inside. The second gasket 42 is provided at the end of the groove. The end of the second spring 44 away from the shoulder structure 451 abuts against the second gasket 42.
[0030] The top screw plug 41 has a top screw plug step 411 on the outside of the top screw plug 41. One end of the top screw plug 41 is inserted into the valve body 2, and the top screw plug step 411 abuts against the outside of the valve body 2.
[0031] A second O-ring 43 for sealing is provided at the connection between the top screw plug 41 and the valve body 2;
[0032] The working principle and beneficial effects are as follows:
[0033] refer to Figure 1 , 2 As shown, since the motor can achieve forward and reverse rotation, Figure 1The A(B) and B(A) chambers mentioned are the inlet and outlet oil ports of the motor. When the motor port A is under high pressure, the flushing device A(B) chamber also contains high-pressure oil. The high-pressure oil flows through the notch on the valve core 11 to the right end chamber of the valve core 11, compressing the first spring 13 on the left end of the valve core 11. The valve core 11 moves to the left, and the low-pressure oil in the left B(A) chamber connects with the C chamber. When the pressure at the motor port A overcomes the first spring 13 on the left side of the valve core, forming a small gap between the B(A) and C chambers, because the center of the cone valve core 45 has an oil drain hole that is always connected to the T port, pressure cannot be built up in the C chamber when the gap is small. The oil flows directly from the oil drain hole in the center of the cone valve core 45 to the T port, realizing the flushing function. When the pressure at the motor port A overcomes the first spring on the left side of the valve core 11, forming a large gap, the B(A) and C chambers are no longer throttled, and the pressures are equal. Due to the large flow rate, the normally open drain hole of the cone valve core 45 and the T port cannot release pressure in time. The oil pressure rises in the C chamber, overcoming the force of the second spring 44 and pushing the cone valve core 45 upward until the hydraulic oil in the D chamber flows through the through hole on the cylindrical surface of the cone valve core 45 to the T port. The pressure in the D chamber is released, realizing the oil flushing function. The function of the second gasket 42 here is to adjust the force of the second spring 44. Due to the presence of the throttling gasket 46, pressure is released in chamber D, and the oil pressure in chamber C also drops instantaneously. The second spring 44 then presses the shoulder of the cone valve core 45 against the valve body 2 surface. At this time, the oil pressure in chamber C rises again, overcoming the second spring 44 to move the cone valve core 45 upward. Oil is released from chamber D to flush and cool the system. This design concept ensures that the oil pressure in chambers B(A) and C does not drop too low due to internal leakage in chamber D. Since the low-pressure oil pressure on the B(A) side is involved in handle control and motor brake release, this throttling design to avoid a very low pressure drop at the low-pressure B(A) port is very necessary. When the motor reverses to high pressure at port B, the control logic is consistent with that of forward rotation to high pressure at port A.
[0034] The flushing device provided by this utility model is essentially controlled by using the oil pressure on the high-pressure side of the walking motor to enter the flushing device, overcoming the valve core spring force, so that the oil on the low-pressure side of the motor is connected at the T port, thereby realizing the flushing and cooling of the oil in the closed system components.
[0035] It should be noted that the terms "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. "A plurality of" means two or more. "Installed," "connected," and "joined" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection.
[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.
Claims
1. A rinsing device, characterized in that The utility model provides a valve, including adjusting assembly (1), valve body (2), oil inlet assembly (3), oil outlet assembly (4), valve body (2) inside is equipped with adjusting assembly (1) and oil outlet assembly (4), and the bottom of valve body (2) is equipped with oil inlet assembly (3) symmetry, adjusting assembly (1) is connected with oil inlet assembly (3), and oil inlet assembly (3) is connected with oil outlet assembly (4) through the cavity in valve body (2) interior, The adjusting assembly (1) includes a valve core (11), a first gasket (12), a first spring (13), a first O-shaped ring (14) and a screw plug (15). The valve core (11) is arranged in the valve body (2). Both ends of the valve core (11) are provided with valve core steps (111). The valve body (2) is provided with valve body steps (21) near the valve core steps (111). The first gasket (12) is symmetrically sleeved on both ends of the valve core (11). One side of the first gasket (12) is in abutment with the valve core steps (111) and the valve body steps (21). The first spring (13) is symmetrically sleeved on both ends of the valve core (11). One end of the first spring (13) is in abutment with the other side of the first gasket (12). The other end of the first spring (13) away from the first gasket (12) is in abutment with the screw plug (15). The oil inlet assembly (3) includes a bottom screw plug (31). The outer side of the bottom screw plug (31) is provided with a bottom screw plug step (311). One end of the bottom screw plug (31) is inserted into the valve body (2). The bottom screw plug step (311) is in abutment with the outer side of the valve body (2). The inner part of the bottom screw plug (31) is provided with a through hole for oil inlet. The oil outlet assembly (4) includes a conical valve core (45), a throttling gasket (46) and a snap spring (47). The conical valve core (45) is arranged in the valve body (2). The inner hole of the conical valve core (45) is provided with a sink and a snap spring groove. The sink is provided with the throttling gasket (46). The snap spring groove is provided with the snap spring (47) for fixing the throttling gasket (46).
2. The irrigation device of claim 1, wherein, The outer side of the screw plug (15) is provided with a screw plug step (151). One end of the screw plug (15) is inserted into the valve body (2). The screw plug step (151) is in abutment with the outer side of the valve body (2). The inner part of the screw plug (15) is provided with a groove. The other end of the first spring (13) away from the first gasket (12) is in abutment with the end part of the groove in the inner part of the screw plug (15).
3. The irrigation device of claim 2, wherein, The connection part of the screw plug (15) and the valve body (2) is provided with the first O-shaped ring (14) for sealing.
4. The irrigation device of claim 1, wherein, The connection part of the bottom screw plug (31) and the valve body (2) is provided with the rectangular ring (32) for sealing.
5. The irrigation device of claim 1, wherein, The outer side of the conical valve core (45) is provided with a shoulder structure (451). The inner part of the valve body (2) near the shoulder structure (451) is provided with a second valve body step (22). One side of the shoulder structure (451) is in abutment with the second valve body step (22). The second spring (44) is sleeved on one end of the conical valve core (45). One end of the second spring (44) is in abutment with the side of the shoulder structure (451) away from the second valve body step (22). The inner part of the top screw plug (41) is provided with a groove. The second gasket (42) is arranged at the end part of the groove. The other end of the second spring (44) away from the shoulder structure (451) is in abutment with the second gasket (42).
6. The device of claim 5, wherein, The top screw plug (41) is externally provided with a top screw plug step (411), one end of the top screw plug (41) is inserted into the valve body (2), and the top screw plug step (411) is abutted against the outside of the valve body (2).
7. The rinsing device according to claim 6, characterized in that, The connection part of the top screw plug (41) and the valve body (2) is provided with a second O-shaped ring (43) for sealing.