Sliding sealing structure of self-lubricating actuator

Abstract

The utility model discloses a self-lubricating actuator sliding sealing structure which comprises a self-lubricating actuator shell, a piston is connected to the inner side of the self-lubricating actuator shell in a sliding mode, a piston rod is installed on the inner side of the piston, and the piston rod extends out of the self-lubricating actuator shell. The solid lubricating material is embedded in the groove in the outer side of the sealing piece, so that the driver has a self-lubricating function, friction heat and abrasion can be reduced, the sealing service life is prolonged, in addition, the damper and the buffer spring are arranged in the buffer groove, and when the piston reciprocates, the buffer blocks at the two ends of the piston impact the damper and the buffer spring, so that the service life of the driver is prolonged. Impact on the end portion of the piston can be relieved, motion stability is improved, an actuator structure is protected, the dustproof ring, the auxiliary sealing ring and the main sealing ring are sequentially arranged in the stepped sealing groove of the rod side cylinder body end cover, the double sealing effect is achieved through the combined design of the double sealing rings, the sealing capacity is remarkably improved, and the leakage risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to actuator sealing technical field, concretely is a kind of self-lubricating actuator sliding seal structure. BACKGROUND

[0002] Self-lubricating actuator is a kind of hydraulic executing element that realizes low friction, maintenance-free or low maintenance by special technology, and it realizes self-supplying lubricating medium in the process of movement by integrating self-lubricating material or structural design, thereby reducing friction loss and prolonging service life, compared with traditional actuator, it can cope with high-frequency reciprocating motion or extreme working conditions without relying on external lubrication system.

[0003] Some existing actuator is sealed by sealing element, although it has sealing effect, but impact is generated in the reciprocating movement of actuator, these impacts can increase the wear between sealing element and sliding surface, possibly make the deformation damage of sealing element and reduce the sealing effect of sealing element. UTILITY MODEL CONTENTS

[0004] The utility model is to provide a kind of self-lubricating actuator sliding seal structure, to solve the problem raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of self-lubricating actuator sliding seal structure, including self-lubricating actuator shell, the piston is slidably connected in self-lubricating actuator shell inner side, the piston rod is installed in piston inner side, the piston rod extends out self-lubricating actuator shell outside.

[0006] The self-lubricating actuator shell includes cylinder barrel and cylinder body end cover, the cylinder body end cover is arranged at the both ends of cylinder barrel, the inner side of the outer end of the cylinder body end cover on the rod side is provided with a stepped sealing groove, the outer side of the stepped sealing groove is provided with a dustproof ring, the middle part of the stepped sealing groove is provided with a secondary sealing ring, the inner side of the stepped sealing groove is provided with a primary sealing ring, the guiding sleeve is arranged in the groove on the inner side of the cylinder body end cover on the rod side, the annular buffer pad is fixedly connected to the end of the two cylinder body end covers facing each other, the buffer groove is arranged in the circumferential direction on the outer side of the annular buffer pad, the damper is arranged in the buffer groove, and the buffer spring is arranged outside the damper.

[0007] In the above technical solution, the damper and the buffer spring are arranged in the buffer groove, and when the piston reciprocates, the buffer blocks at both ends of the piston hit the damper and the buffer spring, which can reduce the impact of the piston end and reduce noise, improve the motion stability and protect the actuator structure.

[0008] As a further preferred embodiment of the present technical solution, the primary sealing ring adopts a combined structure, including a polytetrafluoroethylene wear-resistant layer and a rubber elastic layer.

[0009] The technical scheme has the advantages that the sealing property and wear resistance are solved by material compounding or layering design.

[0010] As a further preferred aspect of the technical scheme, a groove at one end of the outer side of the piston is provided with a sealing element, and a groove at the other end of the outer side of the piston is provided with a wear-resistant ring.

[0011] As a further preferred aspect of the technical scheme, a self-lubricating layer is arranged in the groove on the outer surface of the sealing element, and the self-lubricating layer is a solid lubricating material.

[0012] The technical scheme has the advantages that the solid lubricating material is embedded in the groove on the outer side of the sealing element, so that the actuator has a self-lubricating function, the friction heat and wear are reduced, and the sealing life is prolonged.

[0013] As a further preferred aspect of the technical scheme, the sealing element is arranged between the cylinder and the piston, and the sealing element is made of PTFE material.

[0014] As a further preferred aspect of the technical scheme, a buffer sleeve is arranged in the groove at both ends of the piston and located on the outer side of the piston rod, and a buffer block is arranged in the circumferential direction of one end of the two buffer sleeves opposite to each other.

[0015] The technical scheme has the advantages that the buffer sleeve is made of rubber material, and the buffering effect is further improved when the piston reciprocates.

[0016] As a further preferred aspect of the technical scheme, the buffer block is arranged corresponding to the buffer groove, and the outer wall of the buffer block is in sliding connection with the inner wall of the buffer groove.

[0017] The utility model provides a kind of self-lubricating actuator sliding seal structure, with the following beneficial effects:

[0018] (1) the utility model embeds solid lubricating material in the groove on the outer side of the sealing element, so that the actuator has a self-lubricating function, the friction heat and wear are reduced, and the sealing life is prolonged, in addition, damper and buffer spring are arranged in the buffer groove, when the piston reciprocates, the buffer block at both ends of the piston impacts damper and buffer spring, can reduce piston end impact and reduce noise, improve motion stability, protect actuator structure.

[0019] (2) the utility model sequentially arranges dustproof ring, secondary sealing ring and main sealing ring in the stepped sealing groove of the rod side cylinder end cover, realizes double sealing effect by double sealing ring combination design, significantly improves sealing capacity, reduces leakage risk. ACCURACY OF DRAWINGS

[0020] Figure 1 It is the overall structure schematic view of the utility model;

[0021] Figure 2 is a partial sectional view of the utility model;

[0022] Figure 3 is a structure diagram of the utility model self-lubricating actuator seal;

[0023] Figure 4 is the utility model Figure 3 is an enlarged view of A in the middle;

[0024] Figure 5 is a structure diagram of the utility model piston;

[0025] In the figure: 1, self-lubricating actuator shell; 11, cylinder barrel; 12, cylinder end cover; 121, stepped sealing groove; 122, dustproof ring; 123, secondary sealing ring; 124, primary sealing ring; 125, guide sleeve; 126, annular buffer pad; 1261, buffer groove; 1262, damper; 1263, buffer spring; 2, piston rod; 3, piston; 31, sealing element; 32, wear-resistant ring; 33, buffer sleeve; 34, buffer block. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0027] The utility model provides technical scheme: as 1 shows, in the embodiment, a self-lubricating actuator sliding seal structure, including self-lubricating actuator shell 1, self-lubricating actuator shell 1 inner side sliding connection has piston 3, piston 3 inner side is installed with piston rod 2, and piston rod 2 extends out self-lubricating actuator shell 1 outside.

[0028] As Figure 2 And Figure 3 As shown in the figure, the self-lubricating actuator shell 1 includes the cylinder barrel 11 and the cylinder end cover 12, and the cylinder end cover 12 is arranged at both ends of the cylinder barrel 11. The surface of the actuator cylinder barrel 11 in contact with the sealing element 31 is subjected to hardening treatment, such as ceramic coating, to reduce wear. The inner side of the outer end of the rod-side cylinder end cover 12 is provided with a stepped sealing groove 121. The outer side of the stepped sealing groove 121 is provided with a dustproof ring 122. The middle part of the stepped sealing groove 121 is provided with a secondary sealing ring 123. The inner side of the stepped sealing groove 121 is provided with a primary sealing ring 124. The primary sealing ring 124 adopts a combined structure, including a polytetrafluoroethylene wear-resistant layer and a rubber elastic layer. Through material compounding or layered design, the problems of sealing performance and wear resistance are solved in coordination. The inner groove of the inner side of the rod-side cylinder end cover 12 is provided with a guide sleeve 125. Through the sequential arrangement of the dustproof ring 122, the secondary sealing ring 123 and the primary sealing ring 124 in the stepped sealing groove 121 of the rod-side cylinder end cover 12, the double-sealing effect is realized through the double-sealing ring combined design, the sealing capacity is significantly improved, the leakage risk is reduced, and the sealing ring is made of high-strength rubber.

[0029] As shown in Figure 3 and Figure 4 , the two cylinder end covers 12 are fixedly connected with annular buffer pads 126 at the opposite ends, the outer side of the annular buffer pads 126 is arranged with buffer grooves 1261 in the circumferential direction, the buffer grooves 1261 are each provided with a damper 1262, the outer side of the damper 1262 is sleeved with a buffer spring 1263, the buffer blocks 34 are correspondingly arranged with the buffer grooves 1261, the outer wall of the buffer block 34 is slidably connected with the inner wall of the buffer groove 1261, the damper 1262 and the buffer spring 1263 are arranged in the buffer groove 1261, when the piston 3 reciprocates, the buffer blocks 34 at the two ends of the piston 3 strike the damper 1262 and the buffer spring 1263, which can reduce the impact of the piston 3 end and reduce noise, improve the motion stability, and protect the actuator structure.

[0030] As shown in Figure 2 and Figure 5 , the recess on one end of the outer side of the piston 3 is provided with a sealing element 31, the recess on the other end of the outer side of the piston 3 is provided with a wear-resistant ring 32, the outer surface of the sealing element 31 is provided with a self-lubricating layer, the self-lubricating layer is a solid lubricating material, the solid lubricating material such as graphite and PTFE is embedded in the recess on the outer side of the sealing element 31, the lubricant is activated by friction heat to release a continuous lubricating film on the surface of the friction pair, so that the driver has a self-lubricating function, which can reduce friction heat and wear, prolong the service life of the seal, the sealing element 31 is installed between the cylinder barrel 11 and the piston 3, the sealing element 31 is made of PTFE material, the recesses at the two ends of the piston 3 are each provided with a buffer sleeve 33 located on the outer side of the piston rod 2, the buffer blocks 34 are arranged in the circumferential direction at the opposite ends of the two buffer sleeves 33, the buffer sleeve 33 is made of rubber material, which further improves the buffering effect when the piston 3 reciprocates.

[0031] The utility model provides a kind of self-lubricating actuator sliding seal structure, specific working principle is as follows: when using, first, piston 3 is placed into self-lubricating actuator shell 1 inside, dust ring 122, secondary sealing ring 123 and main sealing ring 124 effectively seal the port of self-lubricating actuator shell 1, realize double seal effect, the guide sleeve 125 of setting is guided to piston rod 2, and sealing ring is mainly made of high-strength rubber;When piston rod 2 and piston 3 move, buffer block 34 strikes buffer groove 1261 and buffer spring 1263, to further reduce the impact of piston 3 end, improve motion stability, and the buffer sleeve 33 of setting is made of rubber material, which further improves the buffering effect when the piston 3 reciprocates.

[0032] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sliding seal structure for a self-lubricating actuator, comprising a self-lubricating actuator housing (1), characterized in that: A piston (3) is slidably connected to the inner side of the self-lubricating actuator housing (1), and a piston rod (2) is installed on the inner side of the piston (3). The piston rod (2) extends out of the outside of the self-lubricating actuator housing (1). The self-lubricating actuator housing (1) includes a cylinder (11) and a cylinder end cap (12). The cylinder end cap (12) is located at both ends of the cylinder (11). A stepped sealing groove (121) is provided on the inner side of the outer end of the cylinder end cap (12) on the rod side. A dustproof ring (122) is provided on the outer side of the stepped sealing groove (121). A secondary sealing ring (123) is provided in the middle of the stepped sealing groove (121). A main sealing ring is provided on the inner side of the stepped sealing groove (121). A sealing ring (124) is provided. A guide sleeve (125) is provided in the groove inside the cylinder end cap (12) on the rod side. An annular buffer pad (126) is fixedly connected to one end of each of the two cylinder end caps (12). Buffer grooves (1261) are arranged in the circumferential direction on the outer side of the annular buffer pad (126). A damper (1262) is provided in each buffer groove (1261). A buffer spring (1263) is sleeved on the outer side of each damper (1262).

2. The sliding seal structure for a self-lubricating actuator according to claim 1, characterized in that: The main sealing ring (124) adopts a combined structure, including a polytetrafluoroethylene wear-resistant layer and a rubber elastic layer.

3. The sliding seal structure for a self-lubricating actuator according to claim 1, characterized in that: A sealing element (31) is provided in the groove at one end of the outer side of the piston (3), and a wear-resistant ring (32) is provided in the groove at the other end of the outer side of the piston (3).

4. The self-lubricating actuator sliding seal structure according to claim 3, characterized in that: The outer surface groove of the seal (31) is provided with a self-lubricating layer, which is a solid lubricating material.

5. The sliding seal structure for a self-lubricating actuator according to claim 3, characterized in that: The seal (31) is installed between the cylinder (11) and the piston (3), and the seal (31) is made of PTFE material.

6. The sliding seal structure for a self-lubricating actuator according to claim 1, characterized in that: The piston (3) has a buffer sleeve (33) in the groove at both ends, and is located outside the piston rod (2). Buffer blocks (34) are arranged in the circumferential direction at the opposite ends of the two buffer sleeves (33).

7. The sliding seal structure for a self-lubricating actuator according to claim 6, characterized in that: The buffer block (34) is correspondingly provided with the buffer groove (1261), and the outer wall of the buffer block (34) is slidably connected with the inner wall of the buffer groove (1261).

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