A measuring tool for the width of the outlet of a closed welded impeller

Abstract

The application discloses a kind of measuring tools of closed welding impeller air outlet width, it is characterized in that, including main ruler and the measuring assembly of being installed on the two measuring claws of main ruler, measuring assembly end is placed at the air outlet of impeller between wheel cover and wheel disc;The measuring assembly includes: fixed block, locating seat and measuring rod;The fixed block is fixed on measuring claw, and the measuring rod is connected with fixed block after being sleeved locating seat;Measuring rod end cooperates locating seat and measures the width of air outlet.The special measuring tool of the application is convenient to operate and use, and the actual width of closed welding impeller air outlet can be measured quickly, intuitively and accurately.

Description

Technical Field

[0001] This invention belongs to the field of centrifugal compressor technology and relates to a measuring tool for the width of the air outlet of a closed welded impeller. Background Technology

[0002] The impeller is the core component of a centrifugal compressor. For welded impellers, due to the lack of dedicated measuring tools for the process, vernier calipers are currently commonly used for measurement. However, due to their structure, measurement is inconvenient and the accuracy cannot be guaranteed. Nevertheless, the dimensional deviation of the impeller outlet width has a direct impact on the performance of the fan equipment.

[0003] After the impeller is welded together, its air outlet is formed. After stress relief through welding and heat treatment, the width of the closed-type welded impeller air outlet will change accordingly. For hidden dimensions such as the impeller air outlet width that exist during the manufacturing process, to achieve process control of critical steps, it is necessary to promptly and effectively handle any dimensional deviations found in the relevant process in order to improve the manufacturing quality of the centrifugal compressor impeller. Summary of the Invention

[0004] The purpose of this invention is to provide a measuring tool for the width of the air outlet of a closed-type welded impeller, thereby solving the problem that there is a lack of dedicated measuring tools for the width of the air outlet of closed-type welded impellers during the manufacturing process.

[0005] The technical solution adopted in this invention is a measuring tool for measuring the width of the air outlet of a closed-type welded impeller. It is characterized by comprising a main scale and a measuring component mounted on two measuring claws of the main scale. The end of the measuring component is positioned at the air outlet of the impeller between the impeller disc and the impeller cover. The measuring component includes a fixing block, a positioning seat, and a measuring rod. The fixing block is fixed to the measuring claws, and the measuring rod is fitted onto the positioning seat and connected to the fixing block. The end of the measuring rod, in conjunction with the positioning seat, measures the width of the air outlet.

[0006] The fixing block is saddle-shaped; a straight groove is opened in the middle of the fixing block, and the two sides of the straight groove are support feet. A through hole is opened in the horizontal part corresponding to the straight groove, and an adjustment knob is installed in the through hole; the two support feet of the fixing block have a first square hole near the end for connecting with the measuring rod; the fixing block is connected to the measuring claw of the main scale through the straight groove and is tightened by adjusting the knob.

[0007] The measuring rod consists of a square rod and a boss. One end of the square rod is connected to the first square hole of the fixing block, and the other end of the boss has a chamfer. The boss contacts the wheel cover and the surface of the wheel disc.

[0008] The positioning seat consists of a square slider and a vertical rod; the square slider has a second square hole, through which the positioning seat is connected to the measuring rod; the square slider also has a through hole arranged at 90° with the second square hole, and an adjustment knob is installed in the through hole; the vertical rod is located at one end of the positioning seat and is arranged perpendicular to the measuring rod, and the side of the vertical rod contacts the outer arc surface of the wheel cover and the wheel disc.

[0009] The beneficial effects of this invention are:

[0010] The dedicated measuring tool of this invention is easy to operate and can quickly, intuitively and accurately measure the actual width of the air outlet of a closed welded impeller.

[0011] The positioning seat makes the position of the air outlet of the impeller being measured more accurate.

[0012] The chamfer at the probe of the measuring rod also makes the measurement results of the impeller outlet width more accurate. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the impeller outlet width measuring tool of the present invention;

[0014] Figure 2 This is a structural diagram of the fixing block for measuring the width of the impeller outlet;

[0015] Figure 3 This is a structural diagram of the positioning seat for the impeller outlet width measuring tool;

[0016] Figure 4 This is a structural diagram of the measuring rod of the impeller outlet width measuring tool;

[0017] Figure 5 It is a reference for the impeller workpiece in the impeller outlet width measuring tool. Figure 1 ;

[0018] Figure 6 This is an operation diagram of the impeller outlet width measuring tool;

[0019] Figure 7 It is a reference for the impeller workpiece in the impeller outlet width measuring tool. Figure 2 .

[0020] In the diagram, 1. Main scale, 2. Fixing block, 3. Positioning seat, 4. Measuring rod, 5. Fastening screw, 2-1. Straight groove, 2-2. First square hole, 3-1. Second square hole, 4-1. Chamfer, 4-2. Square rod.

[0021] a: The distance between the outer edge of the wheel cover and the air outlet before finishing;

[0022] b: The distance between the outer edge of the wheel and the air outlet before finishing;

[0023] B: The final width of the closed-loop welded impeller outlet after precision machining;

[0024] C: The value displayed on the main scale screen;

[0025] e: "section e" located at a distance e from the outer edge of the wheel cover;

[0026] h: The thickness of the wheel cover on section e. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1 As shown: A measuring tool for measuring the width of the air outlet of a closed-type welded impeller includes a main scale 1 and a measuring component mounted on two measuring claws of the main scale 1. The end of the measuring component is placed at the air outlet of the impeller between the impeller disc and the impeller cover. The measuring component includes a fixing block 2, a positioning seat 3, and a measuring rod 4. The fixing block 2 is fixed on the measuring claws, and the measuring rod 4 is fitted onto the positioning seat 3 and connected to the fixing block 2. The end of the measuring rod 4 cooperates with the positioning seat 3 to measure the width of the air outlet.

[0029] like Figure 2 As shown, the fixing block 2 is saddle-shaped; a straight groove 2-1 is opened in the middle of the fixing block 2, and the two sides of the straight groove 2-1 are support feet. A through hole is opened on the horizontal part corresponding to the straight groove 2-1, and an adjustment knob is set at the through hole; the two support feet of the fixing block 2 are each opened near the end with a first square hole 2-2 for connecting with the measuring rod 4; the fixing block 2 is connected to the measuring claw of the main scale 1 through the straight groove 2-1 and is tightened by adjusting the knob.

[0030] like Figure 4 As shown, the measuring rod 4 consists of a square rod 4-2 and a boss. One end of the square rod 4-2 is connected to the first square hole 2-2 of the fixing block 2, and the other end of the boss has a chamfer 4-1. The boss is in contact with the surface of the wheel cover or wheel disc.

[0031] like Figure 3 As shown, the positioning seat 3 consists of a square slider and a vertical rod; the square slider has a second square hole 3-1, and the positioning seat 3 is sleeved with the measuring rod 4 through the second square hole 3-1; the square slider also has a through hole arranged at 90° with the second square hole 3-1, and an adjustment knob is set at the through hole; the vertical rod is located at one end of the positioning seat 3 and is arranged perpendicular to the measuring rod 4, and the side of the vertical rod contacts the outer arc surface of the wheel cover or wheel disc.

[0032] like Figure 5-6 As shown, when using this measuring tool to measure the width of the impeller outlet, the following steps are included:

[0033] 1. When the impeller is welded and the air outlet is formed, the values ​​of a and b need to be determined first based on the actual outer diameter of the impeller disc and cover of the impeller to be tested;

[0034] 2. Place the positioning seat 3 on the measuring rod 4 connected to the fixed measuring claw on the main scale 1 against the outer circle of the wheel, and then slowly move the boss of the measuring rod 4 to contact the inner surface of the wheel;

[0035] 3. Place the positioning seat 3 on the measuring rod 4 connected to the moving measuring claw on the main scale 1 against the outer circle of the wheel cover, and then slowly move the boss of the measuring rod 4 to contact the inner surface of the wheel cover.

[0036] 4. Tighten the main scale 1. The actual width of the impeller outlet can be determined based on the value displayed on the main scale.

[0037] The actual width of the impeller outlet = the value displayed on the main scale + the length of the four bosses on the two measuring rods.

[0038] Application Example 2: Used to measure the thickness h of section e on the impeller cover.

[0039] like Figure 7 As shown, first adjust the directions of the bosses on the two measuring rods 4 to be opposite each other, with one boss contacting the inner side of the surface to be measured and the other boss contacting the outer side of the surface to be measured; at the same time, ensure that the two measuring points are located on the same section of the same pitch circle; at this time, the two measuring bosses can be brought into contact to "zero" the main scale. After the zeroing operation, the measurement work can be carried out;

[0040] During measurement, first adjust the position of the vertical rod of the positioning seat 3 of the measuring rod 4 connected to the fixed measuring claw so that the distance between it and the outer end face of the boss is e and fix it; then attach the vertical rod to the outer arc surface of the impeller cover, and then move the measuring rod 4 so that the boss contacts the inner side of the impeller cover; then move the measuring rod 4 connected to the moving measuring claw on the main scale 1 so that its boss contacts the outer side of the impeller cover; fix the main scale 1, and the value displayed on the main scale 1 at this time is the thickness h of the impeller cover at section e at a distance of e from the outer circle of the cover.

[0041] The thickness h of section e on the wheel cover is equal to the value displayed on the main scale.

Claims

1. A measuring tool for the width of the air outlet of a closed-type welded impeller, characterized in that, The device includes a main scale (1) and a measuring component mounted on two measuring claws of the main scale (1). The end of the measuring component is located at the air outlet of the impeller between the impeller disc and the impeller cover. The measuring component includes a fixing block (2), a positioning seat (3), and a measuring rod (4). The fixing block (2) is fixed on the measuring claws, and the measuring rod (4) is fitted onto the positioning seat (3) and connected to the fixing block (2). The end of the measuring rod (4) cooperates with the positioning seat (3) to measure the width of the air outlet. The measuring rod (4) consists of a square rod (4-2) and a boss. One end of the square rod (4-2) is connected to the first square hole (2-2) of the fixing block (2), and the other end of the boss has a chamfer (4-1). The boss is in contact with the surface of the wheel cover or wheel disc. The positioning seat (3) consists of a square slider and a vertical rod; the square slider has a second square hole (3-1), and the positioning seat (3) is sleeved with the measuring rod (4) through the second square hole (3-1); the square slider also has a through hole arranged at 90° with the second square hole (3-1), and an adjustment knob is set at the through hole; the vertical rod is located at one end of the positioning seat (3) and is arranged perpendicular to the measuring rod (4), and the side of the vertical rod is in contact with the outer end face of the wheel cover or wheel disc.

2. The measuring tool for the width of the air outlet of a closed-type welded impeller according to claim 1, characterized in that, The fixing block (2) is saddle-shaped; a straight groove (2-1) is opened in the middle of the fixing block (2), and the two sides of the straight groove (2-1) are support feet. A through hole is opened in the horizontal part corresponding to the straight groove (2-1), and an adjustment knob is set at the through hole; the two support feet of the fixing block (2) are opened near the end with a first square hole (2-2) for connecting with the measuring rod (4); the fixing block (2) is connected to the measuring claw of the main scale (1) through the straight groove (2-1) and is tightened by adjusting the knob.

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