Multifunctional integrated sealing device of hydraulic cylinder

Abstract

The utility model belongs to the technical field of hydraulic cylinders, and particularly relates to a hydraulic cylinder multifunctional integrated sealing device which comprises a cylinder body, a piston is arranged in the cylinder body in a sliding mode, an annular groove is formed in the circumferential face of the piston, and a plurality of sets of first springs are fixedly arranged on the circumferential face of the annular groove in an annular array mode. A sealing rubber ring is fixedly arranged at the other end of the first spring, the sealing rubber ring is movably inserted into the annular groove, the circumferential face of the outer side of the sealing rubber ring is attached to the circumferential face of the inner wall of the cylinder body, and a first oil pipe and a second oil pipe are arranged on one side of the circumferential face of the cylinder body in a mirror image fixing and penetrating mode; a through hole is formed in one end of the cylinder body, the piston rod slidably penetrates through the through hole, a sealing ring is fixedly arranged on the inner circumferential face of the through hole, the first spring, the annular groove and the sealing rubber ring are matched, the elastic potential energy of the first spring enables the sealing rubber ring to be attached to the inner wall of the cylinder body all the time, and the sealing performance is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic cylinders, in particular to a multifunctional integrated sealing device for a hydraulic cylinder. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion or swinging motion. It has a simple structure and reliable operation. When using it to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the movement is smooth. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] A Chinese patent with publication number CN215486946U discloses a novel multifunctional integrated sealing device for a hydraulic cylinder, comprising a cylinder body, an active cavity is provided inside the cylinder body, a piston body is slidably arranged inside the active cavity, two cooling disks are sleeved on the surface of the piston body, and a sealing plug is sleeved on the surface of the piston body between the two cooling disks, a water storage cavity and a pressurizing cavity are provided inside the piston body, a plurality of circulation channels are provided on the inner wall of the water storage cavity, and the plurality of circulation channels are connected with the corresponding cooling disks, a push plate and a limit block are respectively provided in the pressurizing cavity, and two return springs are provided on one side of the push plate; when the utility model is in use, the stability of the sealing plug in the process of circulating motion can be maintained, thereby enhancing its sealing performance, and at the same time, the heat generated by the sealing plug in the circulating process can be absorbed, and the deformation of the sealing plug caused by thermal expansion and contraction can be prevented, thereby affecting its sealing performance.

[0004] There are still some problems in the use of the above-mentioned new hydraulic cylinder multifunctional integrated sealing device. When the piston body reciprocates in the cylinder body, friction will be generated between the sealing plug and the inner wall of the cylinder body, causing the surface of the sealing ring to gradually wear. After the sealing ring is worn, it may cause hydraulic oil leakage, pollutant entry, reduced efficiency, malfunction and reduced safety. The above-mentioned new hydraulic cylinder multifunctional integrated sealing device does not effectively solve these problems; therefore, a hydraulic cylinder multifunctional integrated sealing device is proposed to address the above problems. Summary of the invention

[0005] In order to make up for the shortcomings of the existing new type of hydraulic cylinder multifunctional integrated sealing device, a hydraulic cylinder multifunctional integrated sealing device is proposed to solve the problem that when the piston body reciprocates in the cylinder body, friction is generated between the sealing plug and the inner wall of the cylinder body, causing the surface of the sealing ring to gradually wear. After the sealing ring is worn, it may cause hydraulic oil leakage, contaminants to enter, efficiency reduction, malfunctions and safety reduction.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the multifunctional integrated sealing device of the hydraulic cylinder described in the utility model comprises a cylinder body, a piston is slidably arranged inside the cylinder body, a piston rod is fixedly arranged on one side of the piston, an annular groove is opened on the circumferential surface of the piston, an array of first springs are fixedly arranged in an annular array on the circumferential surface of the annular groove, a sealing rubber ring is fixedly arranged on the other end of the first spring, the sealing rubber ring is movably inserted into the annular groove, the outer circumferential surface of the sealing rubber ring is fitted with the circumferential surface of the inner wall of the cylinder body, a first oil pipe and a second oil pipe are fixed and penetrated on one side of the circumferential surface of the cylinder body in a mirror-image manner, through the cooperation of the first spring, the annular groove and the sealing rubber ring, the elastic potential energy of the first spring makes the sealing rubber ring always fit with the inner wall of the cylinder body, thereby improving the sealing performance.

[0007] Preferably, a through hole is opened at one end of the cylinder body, the piston rod slides through the through hole, and a sealing ring is fixedly provided on the inner circumferential surface of the through hole, the inner circumferential surface of the sealing ring is tightly fitted with the circumferential surface of the piston rod, and the sealing performance of the cylinder body is improved through the cooperation of the sealing ring.

[0008] Preferably, an array of second springs are fixedly provided in an annular array at one end of the interior of the cylinder body, a buffer disk is fixedly provided at the other end of the second spring, an array of third springs are fixedly provided in an annular array at the other end of the interior of the cylinder body, a buffer ring is fixedly provided at the other end of the third spring, and the piston rod slides through the buffer ring arrangement. Through the cooperation of the second spring, the buffer disk, the third spring and the buffer ring, a buffer is provided when the piston moves to the two ends of the cylinder body, thereby improving the service life of the hydraulic cylinder.

[0009] Preferably, temperature sensors are fixedly provided on one side of the inner wall of the first oil pipe and the second oil pipe, and the temperature of the oil in the cylinder is detected in real time through the cooperation of the temperature sensors.

[0010] Preferably, a spiral cooling plate is fixedly provided on the circumferential surface of the outer wall of the cylinder body, and the spiral cooling plate cooperates with the oil in the cylinder body to cool it when the oil temperature is too high.

[0011] Preferably, a controller is fixedly installed at one end of the cylinder body, the input end of the controller is electrically connected to the output end of the temperature sensor through a wire, and the output end of the controller is electrically connected to the input end of the spiral cooling plate through a wire. Through the cooperation of the controller, the above-mentioned devices work in combination to cool the cylinder body in time.

[0012] Beneficial effects of the utility model:

[0013] The utility model provides a multifunctional integrated sealing device for a hydraulic cylinder. In order to prevent the friction between the sealing rubber ring and the inner wall of the cylinder body, which causes the surface of the sealing rubber ring to gradually wear out, resulting in damaged sealing and causing problems such as hydraulic oil leakage, the first oil pipe is first connected to the second oil pipe and the external oil pump, and the first oil pipe enters the oil to make the piston move to the right and the piston rod push outward. When the first oil pipe stops entering the oil, the second oil pipe enters the oil to make the piston move to the left and the piston rod retract into the cylinder body. When the piston reciprocates in the cylinder body, friction is generated between the sealing rubber ring and the inner wall of the cylinder body, causing the surface of the sealing rubber ring to gradually wear out. The initial state of the first spring is a compressed state. When the sealing rubber ring is worn, the elastic potential energy of the first spring pushes the sealing rubber ring to always fit the inner wall of the cylinder body, thereby ensuring the sealing of the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0015] Figure 1 It is a three-dimensional picture of the whole;

[0016] Figure 2 It is a cross-sectional view of the whole;

[0017] Figure 3 It is a three-dimensional enlarged diagram of the structure of the sealing ring position;

[0018] Figure 4 It is a three-dimensional enlarged structural diagram of the first spring and the annular groove position;

[0019] Legend:

[0020] 1. Cylinder body; 2. Piston; 3. Piston rod; 4. Annular groove; 5. First spring; 6. Sealing rubber ring; 7. First oil pipe; 8. Second oil pipe; 9. Sealing ring; 10. Buffer disk; 11. Second spring; 12. Buffer ring; 13. Third spring; 14. Temperature sensor; 15. Spiral cooling plate; 16. Controller. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Specific examples are given below.

[0023] See also Figure 1-Figure 4 The multifunctional integrated sealing device of a hydraulic cylinder described in the utility model comprises a cylinder body 1, a piston 2 is slidably arranged inside the cylinder body 1, a piston rod 3 is fixedly arranged on one side of the piston 2, an annular groove 4 is provided on the circumferential surface of the piston 2, an array of first springs 5 ​​are fixedly arranged in an annular array on the circumferential surface of the annular groove 4, a sealing rubber ring 6 is fixedly arranged on the other end of the first spring 5, the sealing rubber ring 6 is movably inserted into the annular groove 4, the outer circumferential surface of the sealing rubber ring 6 is fitted with the inner circumferential surface of the cylinder body 1, a first oil pipe 7 and a second oil pipe 8 are fixed and penetrated on one side of the circumferential surface of the cylinder body 1 in a mirror-image manner, a through hole is provided at one end of the cylinder body 1, the piston rod 3 slides through the through hole, and a sealing ring 9 is fixedly arranged on the inner circumferential surface of the through hole, and the inner circumferential surface of the sealing ring 9 is in contact with the circumferential surface of the piston rod 3 Tightly fit. During operation, in order to prevent the friction between the sealing rubber ring 6 and the inner wall of the cylinder body 1, which causes the surface of the sealing rubber ring 6 to gradually wear, resulting in damaged sealing and causing problems such as hydraulic oil leakage, first connect the first oil pipe 7 to the second oil pipe 8 and the external oil pump, and the first oil pipe 7 enters the oil to make the piston 2 move to the right and the piston rod 3 push outward. When the first oil pipe 7 stops entering the oil, the second oil pipe 8 enters the oil to make the piston 2 move to the left and the piston rod 3 retract into the cylinder body 1. When the piston 2 reciprocates in the cylinder body 1, friction is generated between the sealing rubber ring 6 and the inner wall of the cylinder body 1, causing the surface of the sealing rubber ring 6 to gradually wear. The initial state of the first spring 5 is a compressed state. When the sealing rubber ring 6 is worn, the elastic potential energy of the first spring 5 pushes the sealing rubber ring 6 to always fit with the inner wall of the cylinder body 1, thereby ensuring the sealing of the piston 2.

[0024] Furthermore, an array of second springs 11 are fixedly provided in an annular array at one end of the cylinder body 1, a buffer disk 10 is fixedly provided at the other end of the second spring 11, an array of third springs 13 are fixedly provided in an annular array at the other end of the cylinder body 1, a buffer ring 12 is fixedly provided at the other end of the third spring 13, and the piston rod 3 slides through the buffer ring 12. During operation, when the piston 2 reciprocates, it causes an impact on the cylinder body 1. In order to prevent the cylinder body 1 from being damaged, first, when the piston 2 moves to the left, the piston 2 contacts the buffer disk 10, and the second spring 11 is initially in a stretched state. Under the elastic potential energy of the second spring 11, it provides buffering with the piston 2. When the piston 2 moves to the right, the same principle provides buffering force with the cooperation of the third spring 13 and the buffer ring 12, thereby improving the service life of the hydraulic cylinder.

[0025] Furthermore, a temperature sensor 14 is fixedly provided on one side of the inner wall of the first oil pipe 7 and the second oil pipe 8, a spiral cooling plate 15 is fixedly provided on the circumferential surface of the outer wall of the cylinder body 1, and a controller 16 is fixedly installed on one end of the cylinder body 1, and the input end of the controller 16 is electrically connected to the output end of the temperature sensor 14 through a wire, and the output end of the controller 16 is electrically connected to the input end of the spiral cooling plate 15 through a wire. During operation, as the working time of the hydraulic cylinder increases, the internal oil temperature increases accordingly. Failure to cool the oil in time will affect the operation of the hydraulic cylinder. The temperature sensors 14 provided in the first oil pipe 7 and the second oil pipe 8 monitor the oil temperature in real time. When the oil temperature reaches the set temperature that needs to be cooled, the controller 16 controls the start of the spiral cooling plate 15, and at the same time generates a low temperature to cool the cylinder body 1 and the internal oil, thereby ensuring the use of the hydraulic cylinder.

[0026] Working principle: In order to prevent the friction between the sealing rubber ring 6 and the inner wall of the cylinder body 1, which causes the surface of the sealing rubber ring 6 to gradually wear out, resulting in damaged sealing and causing problems such as hydraulic oil leakage, first connect the first oil pipe 7 to the second oil pipe 8 and the external oil pump, and the first oil pipe 7 enters the oil to make the piston 2 move to the right and the piston rod 3 push outward. When the first oil pipe 7 stops entering the oil, the second oil pipe 8 enters the oil to make the piston 2 move to the left and the piston rod 3 retract into the cylinder body 1. When the piston 2 reciprocates in the cylinder body 1, friction is generated between the sealing rubber ring 6 and the inner wall of the cylinder body 1, causing the surface of the sealing rubber ring 6 to gradually wear out. The initial state of the first spring 5 is the compressed state. When the sealing rubber ring 6 is worn, the elastic potential energy of the first spring 5 pushes the sealing rubber ring 6 to always fit with the inner wall of the cylinder body 1, thereby ensuring the sealing of the piston 2. When the piston 2 makes reciprocating motion, it causes impact on the cylinder body 1. In order to prevent the cylinder body 1 from being damaged, first, when the piston 2 moves to the left, the piston 2 contacts the buffer plate 10, and the second spring 11 is initially in a stretched state. Under the elastic potential energy of the second spring 11, it provides buffering with the piston 2. When the piston 2 moves to the right, the same principle provides buffering force with the cooperation of the third spring 13 and the buffer ring 12, thereby improving the service life of the hydraulic cylinder; as the working time of the hydraulic cylinder increases, the internal oil temperature increases accordingly. Failure to cool the oil in time will affect the work of the hydraulic cylinder. The temperature sensor 14 arranged in the first oil pipe 7 and the second oil pipe 8 monitors the oil temperature in real time. When the oil temperature reaches the set temperature that needs to be cooled, the controller 16 controls the start of the spiral cooling plate 15, and at the same time generates a low temperature to cool the cylinder body 1 and the internal oil, thereby ensuring the use of the hydraulic cylinder.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0028] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. Multifunctional integrated sealing device for hydraulic cylinder, characterized by: The invention comprises a cylinder body (1), a piston (2) is slidably arranged inside the cylinder body (1), a piston rod (3) is fixedly arranged on one side of the piston (2), an annular groove (4) is provided on the circumferential surface of the piston (2), an array of first springs (5) are fixedly arranged in an annular array on the circumferential surface of the annular groove (4), a sealing rubber ring (6) is fixedly arranged on the other end of the first spring (5), the sealing rubber ring (6) is movably inserted into the annular groove (4), the outer circumferential surface of the sealing rubber ring (6) is arranged to fit the circumferential surface of the inner wall of the cylinder body (1), and a first oil pipe (7) and a second oil pipe (8) are fixedly arranged on one side of the circumferential surface of the cylinder body (1) in a mirror-image manner and penetrated by them; A through hole is formed at one end of the cylinder body (1), and the piston rod (3) slides through the through hole. A sealing ring (9) is fixedly provided on the inner circumferential surface of the through hole, and the inner circumferential surface of the sealing ring (9) is tightly fitted with the circumferential surface of the piston rod (3); An array of second springs (11) is fixedly arranged in an annular array at one end of the cylinder body (1), a buffer disk (10) is fixedly arranged at the other end of the second spring (11), an array of third springs (13) is fixedly arranged in an annular array at the other end of the cylinder body (1), a buffer ring (12) is fixedly arranged at the other end of the third spring (13), and the piston rod (3) is slidably penetrated through the buffer ring (12); A temperature sensor (14) is fixedly provided on one side of the inner wall of each of the first oil pipe (7) and the second oil pipe (8); A spiral cooling plate (15) is fixedly arranged on the circumferential surface of the outer wall of the cylinder body (1); A controller (16) is fixedly mounted on one end of the cylinder body (1), the input end of the controller (16) is electrically connected to the output end of the temperature sensor (14) via a wire, and the output end of the controller (16) is electrically connected to the input end of the spiral cooling plate (15) via a wire.

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