A device for detecting the rebound force of an outer oil seal lip of an end face seal oil seal

Abstract

The utility model relates to external oil seal elastic force detection technical field, concretely is a kind of end face sealing oil seal external oil seal lip mouth rebound force detection device, including base and the cover plate being set on the top of base, the base and the cover plate are connected by bolt, sleeve set limit cylinder on the bolt, the upper end and lower end of limit cylinder are respectively with the base and the cover plate abut, the base and the cover plate between place have external oil seal, the oil seal lip mouth of external oil seal and the upper surface of base abut, the upper end of cover plate is equipped with pressure sensor. The utility model solves the problem that the existing method cannot control the pressure and the actual compression state of lip mouth, and the error of measured lip mouth rebound force is larger.

Description

Technical Field

[0001] This utility model relates to the field of external oil seal elasticity testing technology, specifically a device for testing the rebound force of the lip of an end-face sealing oil seal. Background Technology

[0002] The end-face sealing oil seal is formed by the outer oil seal and the inner oil seal together. The magnitude of the rebound force of the outer oil seal lip determines the sealing effect. The conventional testing method is to place the outer oil seal lip upward on the platform, fix a disc on the pressure sensor, and then press the pressure sensor down. The disc contacts the rubber lip and applies pressure to the lip, thereby measuring the rebound force. This method cannot control the pressing pressure and the actual compression state of the lip, resulting in a large error in the measured lip rebound force. Utility Model Content

[0003] The purpose of this invention is to provide a device for detecting the rebound force of the lip of an end-face sealing oil seal and an outer oil seal, which solves the problem that existing methods cannot control the pressing pressure and the actual compression state of the lip, resulting in a large error in the measured lip rebound force.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a device for detecting the rebound force of an outer oil seal lip of an end-face sealing oil seal, comprising a base and a cover plate disposed above the base, the base and the cover plate being connected by bolts, a limiting cylinder being sleeved on the bolts, the upper end and the lower end of the limiting cylinder abutting against the base and the cover plate respectively, an outer oil seal being placed between the base and the cover plate, the oil seal lip of the outer oil seal abutting against the upper surface of the base, and a pressure sensor being installed on the upper end of the cover plate.

[0005] Using the above structural design, the cover plate, base, and limiting cylinder are connected together by bolts. Before testing, the weight of the end face oil seal and the cover plate must be weighed and converted into force values. Then, the oil seal is fitted onto the tooling, the bolts are tightened, and the displacement of the pressure sensor is adjusted so that its lower end just touches the cover plate. The force value on the display screen is then zeroed. At this point, the bolts on both sides are released, and the force value can be read on the display screen. This force value is summed with the force values ​​of the end face oil seal weight and the cover plate weight to obtain the rebound force of the end face oil seal lip.

[0006] Preferably, a bracket is provided above the pressure sensor, and a screw passes through the top plate of the bracket from top to bottom and is rotatably connected to the pressure sensor.

[0007] The above design scheme controls the height of the pressure sensor by rotating the screw, while keeping the pressure sensor at the same height during the detection process.

[0008] Preferably, guide rods are symmetrically passed through the top plate, and the lower end of the guide rods is fixedly connected to the pressure sensor.

[0009] With the above structural design, the guide rod guides the pressure sensor during the rotation of the screw, preventing the pressure sensor from rotating with the screw.

[0010] Preferably, the limiting cylinder includes an outer sleeve and an extension sleeve, the lower end of the extension sleeve extends into the outer sleeve, and a positioning bolt passes through the outer wall of the outer sleeve, one end of the positioning bolt abutting against the extension sleeve.

[0011] By adopting the above structural design, the height of the limiting cylinder can be changed by controlling the length of the extension cylinder extending out of the outer sleeve, thereby adapting to the actual compression requirements of different sizes of outer oil seal lips.

[0012] Preferably, a through hole is provided at the center of the base and the cover plate.

[0013] With the above structural design, a through hole needs to be drilled between the cover plate and the base to prevent the formation of a vacuum negative pressure when the lip rebounds and deforms, which would affect the rebound effect.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The cover plate, base, and limiting cylinder are connected together by bolts. Before testing, the weight of the end face oil seal and the cover plate must be weighed and converted into a force value. Then, the oil seal is fitted onto the fixture, the bolts are tightened, and the displacement of the pressure sensor is adjusted so that its lower end just touches the cover plate. The force value on the display screen is then zeroed. At this point, the bolts on both sides are released, and the force value can be read on the display screen. This force value is summed with the force values ​​of the end face oil seal weight and the cover plate weight to obtain the rebound force of the end face oil seal lip. This device can control the actual compression state of the outer oil seal lip, reducing the error in measuring the lip rebound force. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the limiting cylinder of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1 to 2This utility model provides a technical solution: a device for detecting the rebound force of the outer oil seal lip of an end-face sealing oil seal, comprising a base 5 and a cover plate 2 disposed above the base 5. The base 5 and the cover plate 2 are connected by bolts 1. A limiting cylinder 3 is sleeved on the bolt 1, and the upper and lower ends of the limiting cylinder 3 abut against the base 5 and the cover plate 2, respectively. An outer oil seal 4 is placed between the base 5 and the cover plate 2, and the oil seal lip of the outer oil seal 4 abuts against the upper surface of the base 5. A pressure sensor 6 is installed on the upper end of the cover plate 2. After the bolt 1 is released, it can slide freely along the inner hole of the limiting cylinder 3 to prevent it from jamming and affecting the displacement of the cover plate 2. The base 5 is machined with two bolt holes, and the bolt 1 passes through the cover plate 2, with the lower end of the bolt 1 threadedly connected to the base 5.

[0020] A bracket 7 is provided above the pressure sensor 6. A screw 8 passes through the top plate 701 of the bracket 7 from top to bottom and is rotatably connected to the pressure sensor 6. A rotating handle is provided at the upper end of the screw 8.

[0021] Guide rods 9 are symmetrically passed through the top plate 701, and the lower end of the guide rods 9 is fixedly connected to the pressure sensor 6.

[0022] The limiting cylinder 3 includes an outer sleeve 302 and an extension cylinder 301. The lower end of the extension cylinder 301 extends into the outer sleeve 302. A positioning bolt 303 passes through the outer side wall of the outer sleeve 302, and one end of the positioning bolt 303 abuts against the side wall of the extension cylinder 301.

[0023] The base 5 and the cover plate 2 have through holes at their center positions.

[0024] Working principle: During use, the cover plate 2, base 5, and limiting cylinder 3 are connected together by bolt 1. Before testing, the weight of the outer oil seal 4 of the end face oil seal and the weight of the cover plate 2 need to be weighed and converted into a force value through gravity acceleration. Then, the outer oil seal 4 is assembled on the tooling and the bolt 1 is tightened. The screw 8 is rotated to move the pressure sensor 6 downward so that the lower end of the pressure sensor 6 just touches the cover plate 2. The force value on the display screen is reset to zero. At this time, the bolts 1 on both sides are released, and the force value can be read on the display screen. This force value is added to the force value of the weight of the end face oil seal and the force value of the weight of the cover plate 2, which is the lip rebound force of the outer oil seal 4 of the end face oil seal.

[0025] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for detecting the rebound force of the lip of an end-face sealing oil seal, characterized in that: The device includes a base (5) and a cover plate (2) disposed above the base (5). The base (5) and the cover plate (2) are connected by bolts (1). A limiting cylinder (3) is sleeved on the bolt (1). The upper and lower ends of the limiting cylinder (3) abut against the base (5) and the cover plate (2) respectively. An outer oil seal (4) is placed between the base (5) and the cover plate (2). The oil seal lip of the outer oil seal (4) abuts against the upper surface of the base (5). A pressure sensor (6) is installed on the upper end of the cover plate (2).

2. The end-face sealing oil seal lip rebound force detection device according to claim 1, characterized in that: A bracket (7) is provided above the pressure sensor (6), and a screw (8) passes through the top plate (701) of the bracket (7) from top to bottom and is rotatably connected to the pressure sensor (6).

3. The end-face sealing oil seal lip rebound force detection device according to claim 2, characterized in that: Guide rods (9) are symmetrically passed through the top plate (701), and the lower end of the guide rods (9) is fixedly connected to the pressure sensor (6).

4. The end-face sealing oil seal lip rebound force detection device according to claim 1, characterized in that: The limiting cylinder (3) includes an outer sleeve (302) and an extension cylinder (301). The lower end of the extension cylinder (301) extends into the outer sleeve (302). A positioning bolt (303) passes through the outer wall of the outer sleeve (302), and one end of the positioning bolt (303) abuts against the extension cylinder (301).

5. The end-face sealing oil seal lip rebound force detection device according to claim 1, characterized in that: The base (5) and the cover plate (2) have through holes at their center positions.

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