CN201107242Y - Used for hydraulic turbine shear pin test fixture - Google Patents

Abstract

The utility model relates to a hydraulic turbine shear pin test tooling, which comprises an upper base connected with a universal testing machine and a lower base connected with the universal testing machine. Its characteristics are: the upper base and the lower base are made L-shaped, the upper base and the lower base are installed symmetrically, and the upper base and the lower base are respectively made with pin holes for installing shear pins. The upper end surface of the seat and the lower end surface of the lower base are provided with screw holes perpendicular to the pin holes, and the screw holes connected with the universal testing machine are installed in the screw holes. The utility model has the advantages of simple structure, low cost, and convenient operation to realize the tensile-shear test without changing the structure of the testing machine, which greatly improves the working efficiency.

Description

Used for hydraulic turbine shear pin test fixture

technical field

The utility model belongs to a tooling for a universal testing machine, in particular to a tooling for a hydraulic turbine shear pin test.

Background technique

Among the structural members, the members that mainly bear the shear force and undergo shear deformation are called shear members. The characteristics of the force and deformation of the member during shearing are: the resultant forces of the lateral external forces acting on both sides of the member are equal in magnitude, opposite in direction, and close in line of action, and the respective acting member parts are along the line parallel to the line of action of the resultant force. The shear plane is misaligned. The shear test is to determine the maximum misalignment force and the corresponding stress. The shear pin is the insurance pin of the water guiding mechanism of the hydro-generator set. It bears shear force during work. When the external force is greater than a certain value, it reaches the shear force. The shear pin breaks and sends a signal, and the generator set produces a series of actions to protect The unit is safe; in addition, the shear force of the shear pin is related to the mechanical properties of the material, and a process test is required.

Contents of the invention

In order to solve the technical problems in the known technology, the utility model provides a simple structure, convenient use and high work efficiency for hydraulic turbine shear pin test tooling.

The technical scheme that the utility model takes for solving the technical problem existing in the known technology is:

A tooling for shear pin testing of hydraulic turbines, comprising an upper base connected to a universal testing machine and a lower base connected to a universal testing machine, characterized in that: the upper end surface of the upper base and the lower end surface of the lower base There is a screw hole perpendicular to the pin hole, and a screw connected to the universal testing machine is installed in the screw hole. The upper base and the lower base are made into an L shape. The upper base and the lower base are symmetrically installed, and the upper base Pin holes for installing shear pins are formed on the base and the lower base respectively.

The utility model can also adopt the following technical measures:

A surface 1a of the upper base is in close contact with a surface 2b of the lower base to form a shear plane c.

A perspective hole or a perspective groove is formed on the side of the shearing surface.

A tooling sleeve is installed in the pin hole, and a detected shear pin is installed in the tooling sleeve.

The shear pins to be detected are housed in the frock sleeve and adopt a clearance fit.

The advantages and positive effects of the utility model are: since the upper base and the lower base are made into an L shape, the two are installed symmetrically, and the upper base and the lower base are respectively provided with pin holes for installing shear pins. The upper end surface of the base and the lower end surface of the lower base are provided with screw holes perpendicular to the pin holes, and the screw holes connected with the universal testing machine are installed in the screw holes, so the utility model uses a small-scale universal testing machine and uses standard screw Attachment, without changing the structure of the testing machine, to realize the tensile-shear test, which greatly improves the work efficiency; in addition, the utility model also has the advantages of simple structure, low cost, and convenient operation.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the structure of the utility model in use.

In the figure: 1, upper base; 1-1, screw rod; 1-2, screw hole; 1-3, pin hole; 2, lower base; 2-1, screw rod; 2-2 screw hole; 2-3 , pin hole; 3, tooling sleeve; 4, shear pin; 5, perspective hole or perspective slot; 6, universal testing machine.

Detailed ways

In order to further understand the invention content, characteristics and effects of the present utility model, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

Please refer to Figure 1 and Figure 2, the upper base 1 is connected to the universal testing machine 6 through the standard auxiliary screw 1-1, and moves in the direction of F1, and the lower base 2 is connected to the universal testing machine 6 through the standard auxiliary screw 2-1, and moves along the F1 direction. F2 direction moves, and in order to guarantee to add force in the vertical direction, the screw hole 1-2, 2-2 that connects the screw rod on the upper end surface of the upper base 1 and the lower end surface of the lower base 2 is along the vertical direction. The upper base 1 and the lower base 2 are respectively made into an L-shape, and the two are installed symmetrically. One surface 1a of the upper base and one surface 2b of the lower base are closely attached to form a shear plane c, and can be perpendicular to the shear pin The directions of the 4 axes are shifted mutually. The upper base 1 and the lower base 2 are respectively formed with pin holes 1-3, 1-4 for installing shear pins 4. 3 is equipped with tooling sleeves 3 of different sizes and specifications, and a clearance fit is used between the tooling sleeve and the shear pin 4, so that it can be disassembled without the aid of auxiliary equipment; The side is shaped on perspective hole or perspective groove 5.

Claims (5)

1. a kind of tooling that is used for hydraulic turbine shear pin test, comprises the upper base (1) that is connected with universal testing machine and the lower base (2) that is connected with universal testing machine, it is characterized in that: described upper base ( 1) and the lower base (2) are made into an L-shape, the upper base (1) and the lower base (2) are installed symmetrically, and the upper base (1) and the lower base (2) are respectively made with installation shears The pin hole (1-3,1-4) of pin (4) is provided with the screw hole (1-2 , 2-2), screw rods (1-1, 2-1) connected with the universal testing machine are housed in the screw holes. 2. The hydraulic turbine shear pin test tool according to claim 1, characterized in that: one surface 1a of the upper base and one surface 2b of the lower base are in close contact to form a shear plane c. 3. The hydraulic turbine shear pin test tool according to claim 2, characterized in that: the side of the shear surface is formed with a perspective hole or a perspective groove (1-4). 4. The tooling for hydraulic turbine shear pin test according to claim 2, characterized in that: said pin hole is provided with a tooling cover (3), and the detected shearing pin (4) is housed in the tooling cover. 5 . The test tool for shear pins of hydraulic turbines according to claim 4 , characterized in that: said tool cover ( 3 ) is equipped with a shear pin ( 4 ) to be tested and adopts a clearance fit. 6 .

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