Graphite rotor breaking torque test fixture

Abstract

The invention discloses a graphite rotor destructive torque test tool, which is composed of a base (1), a side plate (2), a support column (10), an upper cover plate (4), a push rod (5), a blade (3), etc., and is characterized in that: a side plate (2) is provided on one side of the base (1), and a support column (10) is provided on the other side; the upper cover plate (4) is connected to the bottom plate through the side plate (2) and the support column (10); a center rod (8) and a positioning block (7) are provided on the side plate (2); a positioning hole (6) is provided on the upper cover plate (4); and the push rod (5) passes through the positioning hole (6) and is loaded on the blade (3). The graphite rotor destructive torque test tool of the invention has a simple structure, is easy to operate, and can reduce labor intensity.

Description

Technical Field

[0001] The invention relates to a testing tool, in particular to a graphite rotor destructive torque testing tool. Background Art

[0002] With the rapid growth in sales of new energy vehicles and turbocharged cars, more and more rotary vane electronic vacuum pumps are being used in automobiles. The graphite rotor is a key component of the rotary vane electronic vacuum pump. The breakage of the graphite rotor will cause the vacuum pump to not work properly, so it is very important to evaluate the destructive torque of the graphite rotor. The current commonly used method to evaluate the strength of graphite rotors is to make the graphite rotor material into standard blocks, then test the flexural strength of the standard blocks, and infer the crushing strength of the graphite rotor based on the flexural strength of the standard test blocks. The preparation process of the standard test blocks is complicated and the testing cost is high. In addition, the flexural strength cannot directly characterize the crushing strength of the graphite rotor. The stress environment of the graphite rotor in actual application is different from the stress conditions during the standard test block test. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a graphite rotor breaking torque test tool and a test method thereof.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions.

[0005] A graphite rotor destructive torque test fixture, comprising a base (1), a side plate (2), a support column (10), an upper cover plate (4), a push rod (5), a blade (3), etc., characterized in that: a side plate (2) is provided on one side of the base (1), and a support column (10) is provided on the other side; the upper cover plate (4) is connected to the base plate through the side plate (2) and the support column (10); a center bar (8) and a positioning block (7) are provided on the side plate (2); a positioning hole (6) is provided on the upper cover plate (4); and the push rod (5) passes through the positioning hole (6) and is loaded on the blade (3).

[0006] The distance between the center position of the positioning hole (6) and the inner side of the side plate (2) is 5 to 15 mm, and the push rod (5) and the positioning hole (6) are clearance-matched.

[0007] The blade (3) and the center of the center bar (8) are on the same horizontal line, the angle between the positioning block (7) and the blade (3) is the same as the angle between the two grooves of the graphite rotor (9), and the distance between the lower end of the positioning block (7) and the center of the center bar (8) is 8 to 12 mm.

[0008] The blades (3) and the grooves of the graphite rotor (9) are clearance-matched, and the clearance is 0-0.1 mm.

[0009] Compared with the prior art, the present invention has the following advantages:

[0010] The testing tool of the present invention has a simple structure and is easy to operate;

[0011] The testing method of the present invention can directly measure the destructive torque of the graphite rotor;

[0012] The testing method of the present invention saves the preparation process of the standard test block, can reduce the labor intensity and reduce the testing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the graphite rotor destructive torque test tool of the present invention, Figure 2 It is a front view of the graphite rotor destructive torque testing tool of the present invention.

[0014] List of reference numbers in the figures:

[0015] 1—Base,

[0016] 2—side panels,

[0017] 3—Blades

[0018] 4—Upper cover,

[0019] 5—Rod,

[0020] 6—Positioning hole,

[0021] 7—Positioning block,

[0022] 8—Center rod,

[0023] 9—graphite rotor,

[0024] 10—Support column. DETAILED DESCRIPTION

[0025] For better understanding, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] A graphite rotor destructive torque test fixture, comprising a base (1), a side plate (2), a support column (10), an upper cover plate (4), a push rod (5), a blade (3), etc., characterized in that: a side plate (2) is provided on one side of the base (1), and a support column (10) is provided on the other side; the upper cover plate (4) is connected to the base plate through the side plate (2) and the support column (10); a center bar (8) and a positioning block (7) are provided on the side plate (2); a positioning hole (6) is provided on the upper cover plate (4); and the push rod (5) passes through the positioning hole (6) and is loaded on the blade (3).

[0027] The distance between the center position of the positioning hole (6) and the inner side of the side plate (2) is 5 to 15 mm, and the push rod (5) and the positioning hole (6) are clearance-matched.

[0028] The blade (3) and the center of the center bar (8) are on the same horizontal line, the angle between the positioning block (7) and the blade (3) is the same as the angle between the two grooves of the graphite rotor (9), and the distance between the lower end of the positioning block (7) and the center of the center bar (8) is 8 to 12 mm.

[0029] The blades (3) and the grooves of the graphite rotor (9) are clearance-matched, and the clearance is 0-0.1 mm.

[0030] The present invention provides a specific implementation method for a graphite rotor crushing strength test tool, which comprises: placing a graphite rotor (9) in the test tool, passing a center bar (8) through a center hole of the graphite rotor (9), and inserting a positioning block (7) into a groove of the graphite rotor (9). The graphite rotor (9) is fixed on the test tool, and a blade (3) is inserted into a horizontal groove of the graphite rotor (9). One end of the blade (3) contacts the bottom of the horizontal groove. The distance from the bottom of the groove where the blade (3) contacts to the center of the push rod (5) is L. The push rod (5) is inserted into the positioning hole (6). The push rod (5) is loaded by a mechanical property tester until the graphite rotor (9) is crushed. The load F at the time of crushing is recorded, and the value of F×L is calculated to obtain the breaking torque value of the graphite rotor.

Claims

1. A graphite rotor destructive torque test fixture, comprising a base (1), a side plate (2), a support column (10), an upper cover plate (4), a mandrel (5), and a blade (3), characterized in that: A side plate (2) is provided on one side of the base (1), and a support column (10) is provided on the other side; an upper cover plate (4) is connected to the bottom plate through the side plate (2) and the support column (10); a center bar (8) and a positioning block (7) are provided on the side plate (2); a positioning hole (6) is provided on the upper cover plate (4); a top rod (5) passes through the positioning hole (6) and is loaded on the blade (3); The blade (3) and the center of the center rod (8) are on the same horizontal line, the angle between the positioning block (7) and the blade (3) is the same as the angle between the two grooves of the graphite rotor (9), and the distance between the lower end of the positioning block (7) and the center of the center rod (8) is 8 to 12 mm; The blades (3) and the grooves of the graphite rotor (9) are clearance-matched.

2. A graphite rotor destructive torque test tool according to claim 1, characterized in that: The distance between the center position of the positioning hole (6) and the inner side of the side plate (2) is 5 to 15 mm, and the top rod (5) and the positioning hole (6) are clearance-matched.

3. The graphite rotor destructive torque test tool according to claim 1, characterized in that: The matching clearance between the blade (3) and the groove of the graphite rotor (9) is 0 to 0.1 mm.

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