Online measurable and adjustable device for O-shaped movable sealing ring

Abstract

The utility model discloses an O-shaped movable sealing ring on-line measurable and adjustable device which comprises an ejector rod, a pressing plate, an outer pipe and an inner cylinder, the pressing plate and the outer pipe are fastened through a screw, the inner cylinder is located between the pressing plate and the outer pipe, a handle is installed at the end, penetrating through the outer pipe, of the inner cylinder, a threaded hole is formed in the middle of the pressing plate, and a threaded hole is formed in the middle of the pressing plate. And the ejector rod is in threaded connection in the threaded hole. The O-shaped dynamic sealing ring verification device is simple in structure, low in part processing cost, visual in verification result, and capable of verifying sealing rings of multiple specifications according to requirements, and greatly reduces the trial and error cost of the O-shaped dynamic sealing ring.

Description

Technical Field

[0001] The utility model relates to the technical field of dynamic sealing ring performance testing, in particular to an online testable and adjustable device for an O-type dynamic sealing ring. Background Art

[0002] O-ring is an important sealing part in various product mechanisms. Due to its complex service conditions, it is very easy to have sealing failure, which in turn affects the normal operation of the mechanism system.

[0003] At present, the method for sealing conventional moving parts is to use multi-layer O-rings to block deformation, so as to achieve sealing inside the product. However, for some instruments with higher precision, the size of the dynamic seal O-ring needs to be selected, and O-rings with different tolerance ranges need to be selected for assembly, and then test verification is carried out. Since O-rings are usually used in the hole-shaft matching of metal parts, it is impossible to directly observe the service condition of O-rings, which leads to the fact that the O-rings are stretched, softened or damaged during service. This seriously affects the selection of O-ring tolerances and troubleshooting, especially for products with special environmental test requirements. For example, in a wet and cold environment, the O-ring is affected by the arc groove on its outer edge, which is easy to form water droplets. At the same time, under the influence of the cold air, the water droplets condense into ice rings, and it is impossible to verify whether the ice ring will cause damping effect on the service condition of the O-ring. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide an online measurable and adjustable device for an O-type dynamic sealing ring.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An online measurable and adjustable device for an O-type dynamic sealing ring comprises a push rod, a pressure plate, an outer tube and an inner tube. The pressure plate and the outer tube are fastened by screws. The inner tube is located between the pressure plate and the outer tube. A handle is installed at one end of the inner tube that passes through the outer tube. A threaded hole is opened in the middle of the pressure plate, and the push rod is threadedly connected in the threaded hole.

[0007] Furthermore, the inner cylinder comprises a support and a funnel-shaped cylinder body, wherein the support and the cylinder body are an integrated structure, the support is located at the center of the cylinder body, and the cylinder body is provided with an annular mounting groove distributed in a stepped manner.

[0008] Furthermore, the outer tube is a transparent acrylic plate, a cylindrical boss is arranged at the center of the outer tube, a through hole is opened at the center of the boss, the pillar is inserted into the through hole at the center of the boss, and the inner tube and the outer tube are movably connected; annular grooves distributed in a stepped manner are arranged on the tube wall of the outer tube, the number and position of the annular grooves correspond to the mounting grooves on the tube body, and the structural size of the annular grooves is consistent with the mounting grooves.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. The structure is simple, the parts processing cost is low, and the verification results are intuitive. It can also verify multiple specifications of sealing rings as required, greatly reducing the trial and error cost of O-type dynamic sealing rings.

[0011] 2. Use a transparent and high-strength acrylic plate as the outer tube and install it on the outside of the inner tube, which can easily realize the observability of the O-ring during service. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the external structure of the utility model;

[0014] Figure 3 It is an exploded view of the components of the utility model;

[0015] In the figure: 1, push rod; 2, pressure plate, 21, threaded hole; 3, outer tube, 31, boss, 32, through hole, 33, annular groove; 4, O-ring; 5, inner tube, 51, support, 52, tube body, 53, mounting groove; 6, handle; 7, screw. DETAILED DESCRIPTION

[0016] The specific implementation of the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0017] like Figure 1-3 As shown, an online measurable and adjustable device for an O-type dynamic sealing ring of this embodiment includes a push rod 1, a pressure plate 2, an outer tube 3, an inner tube 5, and a handle 6.

[0018] The inner cylinder 5 includes a support 51 and a funnel-shaped cylinder body 52. ​​The support 51 and the cylinder body 52 are an integrated structure. The support 51 is located at the center of the cylinder body 52. ​​The cylinder body 52 is provided with an annular mounting groove 53 distributed in a stepped manner. O-type dynamic sealing rings 4 of various sizes are introduced into the corresponding mounting grooves 53 through special tooling, so that multiple O-type dynamic sealing rings 4 to be tested are distributed on the cylinder body 52 of the inner cylinder 5.

[0019] The outer tube 3 is a transparent acrylic plate, and a cylindrical boss 31 is arranged at the center of the outer tube 3. A through hole 32 is opened at the center of the boss 31, and a support 51 is inserted into the through hole 32 at the center of the boss 31. The inner tube 5 and the outer tube 3 are movably connected so that the inner tube 5 and the outer tube 3 can rotate relative to each other; annular grooves 33 distributed in a stepped manner are arranged on the tube wall of the outer tube 3, and the number and position of the annular grooves 33 correspond to the mounting grooves 53 on the tube body 52, and the structural size of the annular grooves 33 is consistent with the mounting grooves 53.

[0020] The pressing plate 2 is mounted on the bottom of the outer tube 3 and fastened by screws 7 , so that the inner tube 5 is mounted between the pressing plate 2 and the outer tube 3 , and the handle 6 is mounted on the end of the support 51 extending out of the boss 31 of the outer tube 3 .

[0021] A threaded hole 21 is provided in the middle of the pressing plate 2, and the push rod 1 is installed on the pressing plate 2 through the threaded hole 21; the push rod 1 is screwed into the pressing plate 2, and the point contact at its end presses the bottom of the inner tube 5, thereby achieving the purpose of tightening the inner tube 5, and further squeezing the O-ring 4 installed between the inner tube 5 and the outer tube 3.

[0022] Working principle: Hold the outer edge of the outer tube 3 and turn the handle 6 to rotate the inner tube 5 relative to the outer tube 3. The damping of the handle 6 mainly comes from the squeezed O-type dynamic seal 4. The shape of the O-type dynamic seal 4 during service can be observed through the outer tube 3. In addition, the lubricating grease required for assembly is applied to the O-type dynamic seal 4. In the device of the utility model, the uniformity of the lubricating grease can be clearly observed through the outer tube 3, and the lubricating effect of the lubricating grease at different temperatures can be judged.

[0023] Since the hole-shaft mating surface of metal products in the prior art is generally impossible to observe, it is proposed to use a low-temperature resistant acrylic high-strength plastic transparent plate as the outer tube 3. The light transmittance of this material can reach 92%, which meets the observation requirements. In addition, the plate can be processed by precision, the surface roughness is controllable, and the operating temperature range is -40℃~+70℃, which meets the requirements of special operations. Therefore, visual verification of the O-ring at the dynamic seal fitting can be achieved.

[0024] The device of the utility model simulates the actual environmental conditions of the product or component, and visually detects the performance of the O-ring 4 in the dynamic seal. On the basis of the outer tube 3 of the acrylic plastic sheet with good light transmittance, the commonly used O-ring 4 size matching specifications are mapped to the inner tube 5 of the device of the utility model according to the product design requirements. The high light transmittance can ensure clear observation with the naked eye, and the push rod 1 is inserted, so that the O-ring 4 is squeezed between the inner tube 5 and the outer tube 3, thereby realizing the working state of the O-ring 4 in the dynamic sealing process. The push rod 1 and the inner tube 5 adopt point contact, so in the process of twisting the handle 6, it will not be excessively affected except for the damping caused by the compression of the O-ring 4.

[0025] The structure of the inner cylinder 5 can realize dynamic seal verification of O-rings of various specifications, thereby realizing efficient utilization of the device. It can also realize test verification of double-layer dynamic seal or multi-layer dynamic seal under high sealing requirements according to actual needs, and the test results are intuitive.

[0026] The above description is only a description of the preferred implementation mode of the present invention, and does not limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by technical personnel in this field should fall within the protection scope of the present invention.

Claims

1. An online measurable and adjustable device for an O-type dynamic seal ring, characterized in that: The invention comprises a push rod (1), a pressing plate (2), an outer tube (3), and an inner tube (5), wherein the pressing plate (2) and the outer tube (3) are fastened by screws (7), the inner tube (5) is located between the pressing plate (2) and the outer tube (3), and a handle (6) is installed at one end of the inner tube (5) that passes through the outer tube (3), a threaded hole (21) is provided in the middle of the pressing plate (2), and the push rod (1) is threadedly connected in the threaded hole (21).

2. The online measurable and adjustable device for O-type dynamic sealing ring according to claim 1, characterized in that: The inner cylinder (5) comprises a support (51) and a funnel-shaped cylinder body (52); the support (51) and the cylinder body (52) are an integral structure; the support (51) is located at the center of the cylinder body (52); and the cylinder body (52) is provided with an annular mounting groove (53) distributed in a stepped manner.

3. The online measurable and adjustable device for O-type dynamic sealing ring according to claim 2, characterized in that: The outer tube (3) is a transparent acrylic plate. A cylindrical boss (31) is provided at the center of the outer tube (3). A through hole (32) is provided at the center of the boss (31). The support column (51) is inserted into the through hole (32) at the center of the boss (31). The inner tube (5) and the outer tube (3) are movably connected. The wall of the outer tube (3) is provided with annular grooves (33) distributed in a step-like manner. The number and position of the annular grooves (33) correspond to the mounting grooves (53) on the tube body (52). The structure and size of the annular grooves (33) are consistent with those of the mounting grooves (53).

Images