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CN-121993602-A - Self-compensating high-pressure sealing structure of plunger rod of spraying machine

CN121993602ACN 121993602 ACN121993602 ACN 121993602ACN-121993602-A

Abstract

The invention relates to the technical field of spraying machine sealing, and discloses a self-compensating high-pressure sealing structure of a spraying machine plunger rod, which comprises a motor seat and a ball plunger rod, wherein the ball plunger rod is arranged in the motor seat, the inner wall of the motor seat is fixedly connected with a sealing ring positioning seat, and the sealing ring positioning seat is sleeved on the outer surface of the ball plunger rod. According to the invention, continuous pretightening force can be provided for the V-shaped ring sealing ring through the sealing compensation spring, automatic clearance compensation after the V-shaped ring sealing ring is worn is realized, sealing failure caused by abrasion of a sealing element is avoided, stable sealing effect under high-pressure working conditions is ensured, sealing duration is prolonged, a double guide mechanism is formed by matching the guide copper sleeve with the sealing ring positioning seat, deflection of a ball plunger rod is effectively limited, movement deflection amount is reduced, movement coaxiality of the ball plunger rod is ensured, integral movement precision of equipment is improved, and the operation requirement of a small-flow spraying machine is adapted.

Inventors

  • LI XIAOPENG
  • YANG FAZHENG

Assignees

  • 浙江荣鹏气动工具股份有限公司

Dates

Publication Date
20260508
Application Date
20260409

Claims (7)

  1. 1. A self-compensating high-pressure sealing structure of a plunger rod of a spraying machine comprises a motor seat (12) and a ball plunger rod (1), and is characterized in that the ball plunger rod (1) is arranged in the motor seat (12), a sealing ring positioning seat (11) is fixedly connected to the inner wall of the motor seat (12), the sealing ring positioning seat (11) is sleeved on the outer surface of the ball plunger rod (1), a plurality of cowhide sealing rings (10), a plurality of sealing ring press rings (9), a plurality of V-shaped ring sealing rings (8), a sealing compensation spring (7), a combined check ring (6), a plurality of groups of sealing ring assemblies (5), a plunger seat (3) and a guide copper sleeve (2), the guide copper sleeve (2) is positioned in the plunger seat (3), the cowhide sealing rings (10), the sealing ring press rings (9), the V-shaped ring sealing rings (8), the sealing compensation spring (7), the combined check rings (6), the plurality of groups of sealing ring assemblies (5) and the plunger seat (3) are all positioned in the inner part of the motor seat (12), the outer surface of the plunger seat (3) is sleeved with a plunger seat (4), the outer surface of the plunger seat (4) is provided with a sealing ring (15), the press cover (15) is fixedly connected with the top end of the motor base (12) through a group of mounting screws (17), and the inner top wall of the press cover (15) is fixedly connected with a protective silica gel ring (16).
  2. 2. The self-compensating high-pressure sealing structure of the plunger rod of the spraying machine according to claim 1, wherein the guiding copper sleeve (2) and the sealing ring positioning seat (11) are matched to form a guiding mechanism, and deflection of the plunger rod (1) of the ball head is limited.
  3. 3. The self-compensating high-pressure sealing structure of the plunger rod of the spraying machine according to claim 1, wherein the cowhide sealing ring (10) and the V-shaped ring sealing ring (8) form a main seal, and a plurality of groups of sealing ring assemblies (5) and the combined retainer ring (6) are matched to form a mixed sealing structure.
  4. 4. The self-compensating high-pressure sealing structure of the plunger rod of the spraying machine is characterized in that the sealing compensation spring (7) is arranged on the upper portion of the V-shaped ring sealing ring (8), the sealing compensation spring (7) directly acts on the V-shaped ring sealing ring (8) to enable the sealing compensation spring to be always attached to the outer wall of the plunger rod (1) of the ball head and tightly pressed through the sealing ring pressing ring (9), and continuous pretightening force is provided for the V-shaped ring sealing ring (8) to achieve abrasion self-compensation.
  5. 5. The self-compensating high-pressure sealing structure of the plunger rod of the spraying machine according to claim 1, wherein the sealing ring positioning seat (11) has a guiding function and a sealing ring supporting function.
  6. 6. The self-compensating high-pressure sealing structure of the plunger rod of the spraying machine according to claim 1, wherein a model mark (13) is arranged on the front surface of the motor base (12), and the model mark (13) is positioned in the middle of the motor base (12).
  7. 7. The self-compensating high-pressure sealing structure of the plunger rod of the spraying machine according to claim 1, wherein two holding handles (14) are fixedly connected to the back surface of the motor base (12), and an anti-skid sleeve (141) is sleeved on the outer surface of each holding handle (14).

Description

Self-compensating high-pressure sealing structure of plunger rod of spraying machine Technical Field The invention relates to the technical field of spraying machine sealing, in particular to a self-compensating high-pressure sealing structure of a plunger rod of a spraying machine. Background The spraying machine is equipment for atomizing and uniformly spraying the coating on the surface of an object by high pressure or compressed air, is widely applied to the fields of building, automobiles, furniture, industrial manufacturing and the like, can remarkably improve the construction efficiency, ensures that the coating is smooth and fine, has no brush mark, and is particularly suitable for large-area operation. The existing spray coater plunger rod sealing structure is mostly single combined sealing, lacks the abrasion self-compensating function, is easy to cause sealing failure due to abrasion, is short in service life, is simultaneously guided and sealed to support and separate from design, is easy to cause large deflection of plunger rod movement, is poor in sealing reliability under high-pressure working conditions, and cannot meet the long-acting high-pressure sealing requirement of a small-flow spray coater. Disclosure of Invention The invention aims to provide a self-compensating high-pressure sealing structure of a plunger rod of a spraying machine, which solves the problems of no self-compensation, short service life, poor guiding and sealing fit and insufficient high-pressure sealing reliability of the existing sealing structure of the spraying machine. In order to solve the technical problems, the invention is realized by the following technical scheme: The invention relates to a self-compensating high-pressure sealing structure of a plunger rod of a spraying machine, which comprises a motor seat and a ball plunger rod, wherein the ball plunger rod is arranged in the motor seat, the inner wall of the motor seat is fixedly connected with a sealing ring positioning seat, the sealing ring positioning seat is sleeved on the outer surface of the ball plunger rod, a plurality of cowhide sealing rings, a plurality of sealing ring pressing rings, a plurality of V-shaped ring sealing rings, a sealing compensation spring, a combined retainer ring, a plurality of groups of sealing ring components, a plunger seat and a guiding copper sleeve are sequentially sleeved on the outer surface of the ball plunger rod, the guiding copper sleeve is positioned in the plunger seat, the cowhide sealing rings, the sealing ring pressing rings, the V-shaped ring sealing rings, the sealing compensation spring, the combined retainer ring, the plurality of groups of sealing ring components and the plunger seat are all positioned in the motor seat, the outer surface of the plunger seat is sleeved with a plunger seat sealing ring, the connecting part of the plunger seat sealing ring and the inner wall of the motor seat is fixedly connected with the top end of the motor seat through a group of mounting screws, and the inner top wall of the pressing cover is fixedly connected with a protective silicon rubber ring. Further, the guide copper sleeve is matched with the sealing ring positioning seat to form a guide mechanism, so that deflection of the ball plunger rod is limited. Further, the cowhide sealing ring and the V-shaped ring sealing ring form a main seal, and a plurality of groups of sealing ring components and the combined check ring are matched to form a mixed sealing structure. Further, the seal compensation spring is arranged on the upper portion of the V-shaped ring seal ring, and directly acts on the V-shaped ring seal ring to enable the seal compensation spring to be always attached to the outer wall of the ball plunger rod and tightly pressed through the seal ring pressing ring, so that continuous pretightening force is provided for the V-shaped ring seal ring, and abrasion self-compensation is achieved. Further, the sealing ring positioning seat has a guiding function and a sealing ring supporting function. Further, a model mark is arranged on the front surface of the motor base, and the model mark is positioned in the middle of the motor base. Further, two holding handles are fixedly connected to the back of the motor base, and anti-skid sleeves are sleeved on the outer surface of each holding handle. The invention has the following beneficial effects: According to the invention, continuous pretightening force can be provided for the V-shaped ring sealing ring through the sealing compensation spring, automatic clearance compensation after the V-shaped ring sealing ring is worn is realized, sealing failure caused by abrasion of sealing elements is avoided, stable sealing effect under high-pressure working conditions is ensured, sealing duration is prolonged, a double guide mechanism is formed through matching of the guide copper sleeve and the sealing ring positioning seat, deflection of a ball plunger rod is effect