Device and method for measuring and adjusting deflection angle of inlet guide vane of centrifugal compressor

Abstract

The invention discloses a centrifugal compressor inlet guide vane deflection angle measuring and adjusting device and method, and mainly solves the technical problems that an existing measuring method is difficult to measure and low in measuring precision and accuracy. The measuring device comprises a base and a measuring assembly. The A surface of the base is provided with a clamping groove for clamping the inlet guide vane, and the B surface is a plane, is used for installing the measuring assembly and is parallel to the vertical split surface of the inlet guide vane; the measuring assembly comprises a main graduated scale, an auxiliary graduated scale and a guide rod; one end of the main graduated scale is vertically mounted on the surface B, and the other end of the main graduated scale is suspended; the auxiliary graduated scale comprises a base and an auxiliary graduated disc, and the auxiliary graduated disc is fixedly mounted on the base; the auxiliary dial is provided with an arc-shaped groove matched with the main graduated scale, and the main graduated scale is clamped in the arc-shaped groove and movably connected with the auxiliary dial. The circle center of the main graduated scale and the circle center of the auxiliary graduated disc coincide and are located on the B surface; the guide rod is connected with the suspended end of the base close to the main graduated scale.

Description

Technical Field

[0001] The invention relates to a guide vane angle measuring device, and in particular to a device and method for measuring and adjusting the deflection angle of an inlet guide vane of a centrifugal compressor. Background Art

[0002] The deflection angle of the inlet guide vanes of a centrifugal compressor is typically adjusted using a guide vane adjustment mechanism. Adjusting the deflection angle optimizes centrifugal compressor performance, enabling surge control and flow regulation. The accuracy of the inlet guide vane deflection angle directly impacts the efficiency, stability, and service life of the centrifugal compressor. Therefore, precise measurement of the inlet guide vane deflection angle is essential during the design phase.

[0003] The existing measurement method determines the guide vane's deflection angle by measuring the horizontal angle between the crank and connecting rod connected to the guide vane in the guide vane adjustment mechanism. However, due to machining errors in both the crank and connecting rod, and the fact that they are not aligned on the same plane, measuring the guide vane angle is difficult. Furthermore, as this measurement method is indirect, its precision and accuracy are low, making it impossible to precisely control the centrifugal compressor's operating performance. Summary of the Invention

[0004] The purpose of the present invention is to solve the technical problems that existing measurement methods are difficult to measure and have low measurement precision and accuracy, and to provide a device and method for measuring and adjusting the deflection angle of the inlet guide vanes of a centrifugal compressor.

[0005] To achieve the above objectives, the technical solutions provided by the present invention are:

[0006] A centrifugal compressor inlet guide vane deflection angle measuring and adjusting device, which has the following characteristics:

[0007] Includes base and measurement assembly;

[0008] The base is a block-shaped structure, and a pair of opposite side surfaces thereof are defined as surface A and surface B. Surface A is provided with a slot for engaging the inlet guide vane, and the internal shape and size of the slot are adapted to the outer side surface of the inlet guide vane. Surface B is a flat surface for mounting the measuring assembly and is parallel to the vertical center plane of the inlet guide vane.

[0009] The measuring assembly includes a main scale, a secondary scale and a guide rod;

[0010] The main scale is an arc-shaped structure, with one end vertically mounted on surface B and the other end suspended in the air. The auxiliary scale includes a base and an auxiliary dial, both of which are fan-shaped structures. The auxiliary dial is fixedly mounted on the base, and its radius is smaller than that of the base. The auxiliary dial is provided with an arc-shaped groove that matches the main scale. The main scale is snapped into the arc-shaped groove and is movably connected to the auxiliary dial along the circumference of the arc-shaped groove. The center of the main scale coincides with the center of the auxiliary dial and is located on surface B. The guide rod is located below the auxiliary dial and is connected to the base near the end of the main scale that is suspended in the air. One end of the guide rod is in contact with surface B, and the other end extends out of the auxiliary dial.

[0011] Furthermore, the lower surface of the main scale is provided with an arc-shaped groove coaxial with the main scale, and a rack is installed on the side wall of the arc-shaped groove; a knob is installed at a corresponding position on the bottom of the base, one end of the knob extends into the arc-shaped groove and is provided with a gear meshing with the rack; the other end of the knob extends out of the base for rotation operation, so that the main scale and the auxiliary scale are movably connected.

[0012] Furthermore, the guide rod is connected to the base via a holder; the holder is a U-shaped structure, and the open end of the U-shaped structure passes through the guide rod and is connected to the base.

[0013] Furthermore, the roughness requirement of the inner surface of the slot is Ra1.6 to Ra3.2.

[0014] Furthermore, one end of the main scale is vertically mounted on surface B via a support base.

[0015] Furthermore, the accuracy of the main scale is 1 degree; the accuracy of the auxiliary scale is Spend.

[0016] Furthermore, the base and the auxiliary dial are an integrated structure.

[0017] At the same time, the present invention also provides a method for measuring the deflection angle of the inlet guide vane of a centrifugal compressor, comprising the following steps:

[0018] Step 1: Pre-install all inlet guide vanes on the bracket at the inlet of the centrifugal compressor and connect them to the guide vane adjustment mechanism so that the vertical center plane of each inlet guide vane coincides with the corresponding initial marking line on the bracket;

[0019] Step 2: Assemble the centrifugal compressor inlet guide vane deflection angle measuring and adjusting device, and engage the A surface of the base with any inlet guide vane so that the side edge of the guide rod coincides with the tangential marking line perpendicular to the initial marking line of the inlet guide vane;

[0020] Step 3: Manually rotate any inlet guide vane until its vertical mid-plane coincides with the corresponding end mark on the bracket. At the same time, the main scale moves relative to the auxiliary scale to generate an angle value. Read and record this value.

[0021] Step 4: Compare the angle value obtained in step 3 with the preset angle value, and determine whether the error between the two meets the design requirements. If not, adjust the relative position of the main scale and the auxiliary scale according to the error size, thereby adjusting the angle of the inlet guide vane until it reaches the preset angle value; if it meets the requirements, the angle measurement and adjustment of the inlet guide vane of the centrifugal compressor is completed.

[0022] Furthermore, in step 4, when adjusting the relative positions of the main scale and the auxiliary scale, the inlet guide vane connected to the base rotates at the same time and its vertical center plane moves. When the adjustment is completed, the line projected on the vertical center plane of the inlet guide vane on the bracket is marked as the new end mark line, which serves as the basis for adjusting the driving stroke of the drive unit in the guide vane adjustment mechanism.

[0023] Furthermore, in step 4, the error required by the design is ≤0.5°.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention provides a centrifugal compressor inlet guide vane deflection angle measurement and adjustment device, comprising a base and a measurement assembly. The base's surface A is used to engage the inlet guide vane; the surface B is a flat surface for mounting the measurement assembly and is parallel to the vertical midplane of the inlet guide vane. This invention transfers the inlet guide vane's angle reference line to the base's surface B, thereby enabling direct measurement of the inlet guide vane's deflection angle, reducing the accumulated errors associated with indirect measurement and improving the accuracy of the measured data.

[0026] 2. The present invention provides a centrifugal compressor inlet guide vane deflection angle measuring and adjustment device, which not only realizes the movable connection between the main scale and the auxiliary scale through the meshing relationship between the gear on the knob and the rack in the arc-shaped slot, but also improves the convenience of angle adjustment.

[0027] 3. In the centrifugal compressor inlet guide vane deflection angle measurement and adjustment device provided by the present invention, the roughness requirement of the inner surface of the slot is Ra1.6~Ra3.2. This requirement not only does not cause damage to the surface of the inlet guide vane, but also ensures that the base can be stably connected to the side of the inlet guide vane, thereby ensuring the stability of the measurement process.

[0028] 4. In the centrifugal compressor inlet guide vane deflection angle measuring and adjusting device provided by the present invention, the accuracy of the main scale is 1 degree, and the accuracy of the auxiliary scale is It can not only achieve high-precision measurement of the deflection angle, but also achieve precise adjustment of the angle.

[0029] 5. The present invention provides a method for measuring and adjusting the deflection angle of the inlet guide vane of a centrifugal compressor, which is simple to operate and can read the angle value more intuitively and accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the structure of the surface A of the embodiment of the present invention Figure 1 ;

[0032] Figure 3 A schematic diagram of the structure of the surface A of the embodiment of the present invention Figure 2 ;

[0033] Figure 4 A reference diagram of a usage state of an embodiment of the present invention;

[0034] Figure 5 Schematic diagram of part of the structure of the guide vane adjustment mechanism in an embodiment of the present invention (the drive unit is not shown).

[0035] The following are the descriptions of the reference numerals:

[0036] 1-base, 11-side A, 12-side B, 13-slot, 2-inlet guide vane, 3-main scale, 31-arc slot, 32-rack, 4-secondary scale, 41-base, 42-secondary dial, 43-knob, 5-guide rod, 6-base, 7-support base, 8-bracket, 81-ring, 82-crank, 83-connecting rod. DETAILED DESCRIPTION

[0037] In order to make the objects, advantages and features of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and specific examples. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0038] like Figure 1 、 Figure 2 、 Figure 3 As shown, this embodiment provides a device for measuring and adjusting the deflection angle of an inlet guide vane of a centrifugal compressor, comprising a base 1 and a measuring assembly.

[0039] The base 1 is a block-shaped structure, and its set of relative side surfaces are defined as A surface 11 and B surface 12. Among them, the A surface 11 of the base 1 is provided with a slot 13 for snapping in the inlet guide vane 2. The internal shape and size of the slot 13 are adapted to the outer side surface of the inlet guide vane 2. The roughness of the inner surface of the slot 13 is required to be Ra1.6 to Ra3.2. It can not only be stably snapped in the inlet guide vane 2, but also will not cause damage to the surface of the inlet guide vane 2. The B surface 12 of the base 1 is a plane for installing the measurement component and is parallel to the vertical center plane of the inlet guide vane 2. This embodiment converts the angular reference line of the inlet guide vane 2 to the B surface 12 of the base 1, thereby realizing direct measurement, reducing the error accumulation existing in indirect measurement, and improving the accuracy of the measurement data.

[0040] The entire measuring assembly can be made of stainless steel or 45 steel, which is lightweight and does not affect the deflection of the inlet guide vane 2. The measuring assembly includes a main scale 3, a secondary scale 4, and a guide rod 5. The main scale 3 is an arc-shaped structure, with one end vertically mounted on the B surface 12 of the base 1 via a support base 7, and is relatively fixed to the base 1. The other end of the main scale 3 is suspended in the air.

[0041] The secondary scale 4 comprises a base 41 and a secondary dial 42, both of which are fan-shaped structures. The secondary dial 42 is fixedly mounted on the base 41, and its radius is smaller than that of the base 41. The base 41 and secondary dial 42 can be integral or separate structures. During use, the secondary dial 42 is fixed to the upper surface of the base 41 by screws. The secondary dial 42 is provided with an arcuate groove that matches the main scale 3. The main scale 3 is snapped into the arcuate groove and is movably connected to the secondary dial 42 along the circumference of the arcuate groove. The center of the main scale 3 coincides with the center of the secondary dial 42 and is located on the B surface 12 of the base 1.

[0042] Specifically, the lower surface of the main scale 3 is provided with a coaxial arcuate slot 31, with a rack 32 mounted on the sidewalls of the arcuate slot 31. A knob 43 is mounted at a corresponding position on the bottom of the base 41. One end of the knob 43 extends into the arcuate slot 31 and is equipped with a gear that meshes with the rack 32; the other end of the knob 43 extends out of the base 41. To adjust the angle, rotating the knob 43 moves the main scale 3 relative to the auxiliary dial 42, thereby achieving a movable connection between the main scale 3 and the auxiliary dial 42.

[0043] The guide rod 5 is located below the auxiliary dial 42 and is connected to the base 41 through the holder 6; the holder 6 is a U-shaped structure, and the open end of the U-shaped structure passes through the guide rod 5 and is connected to the base 41, so that the base 41, auxiliary dial 42, guide rod 5, and holder 6 are relatively fixed as a whole; one end of the guide rod 5 is in contact with the B surface 12, and the other end extends out of the auxiliary dial 42. This design makes the benchmark of the measuring component and the base 1 unified, thereby reducing the detection error.

[0044] In this embodiment, the accuracy of the main scale 3 is 1 degree; the accuracy of the auxiliary scale 42 is With this accuracy, the deflection angle of the inlet guide vane 2 can be accurately measured and adjusted.

[0045] Combine Figures 1 to 5 This embodiment also provides a method for measuring and adjusting the deflection angle of an inlet guide vane of a centrifugal compressor, comprising the following steps:

[0046] Step 1: Pre-install all inlet guide vanes 2 on the bracket 8 at the inlet of the centrifugal compressor and connect it to the guide vane adjustment mechanism so that the vertical center plane of each inlet guide vane 2 coincides with the corresponding initial marking line on the bracket 8. Figure 5 As shown, in this embodiment, the guide vane adjustment mechanism includes a drive unit (not shown in the figure), a ring 81, multiple cranks 82 and multiple connecting rods 83; wherein the output end of the drive unit is connected to the ring 81, and the multiple cranks 82 and multiple connecting rods 83 correspond one to one and are consistent with the number of inlet guide vanes 2. One end of each crank 82 is connected to the bottom of the corresponding inlet guide vane 2 through a connecting piece, and the other end is hinged to one end of the corresponding connecting rod 83, and the other end of the connecting rod 83 is hinged to the ring 81. When the guide vane adjustment mechanism is in operation, the drive unit drives the ring 81 to rotate, and the ring 81 then drives the connecting rod 83 and the crank 82 to move in turn, thereby causing the corresponding inlet guide vane 2 to deflect. In the initial state, the vertical center plane of all inlet guide vanes 2 (i.e., the center plane of the teardrop-shaped side) coincides with the corresponding initial marking line.

[0047] Step 2: Assemble the centrifugal compressor inlet guide vane deflection angle measuring and adjusting device described in this embodiment, and clamp the A surface 11 of the base 1 to any inlet guide vane 2 so that one side of the guide rod 5 coincides with the tangential marking line perpendicular to the initial marking line of the inlet guide vane 2.

[0048] Step 3: Manually rotate the inlet guide vane 2 until its vertical mid-plane coincides with the corresponding end mark line on the bracket 8. At the same time, the main scale 3 moves relative to the auxiliary scale 42 to generate an angle value, which is read and recorded.

[0049] Step 4: Compare the angle value obtained in step 3 with the preset angle value, and determine whether the error between the two meets the design requirements (the design error requirement of this embodiment is ≤0.5°). If not, adjust the relative position of the main scale 3 and the auxiliary scale 42 according to the error size, thereby adjusting the angle of the inlet guide vane 2 until it reaches the preset angle value; if it meets the requirements, the measurement and adjustment of the deflection angle of the inlet guide vane of the centrifugal compressor is completed.

[0050] In this embodiment, when the relative positions of the main scale 3 and the auxiliary scale 42 are adjusted, the inlet guide vane 2 connected to the base 1 rotates simultaneously and its vertical center plane moves. After the adjustment is completed, the line where the vertical center plane of the inlet guide vane 2 is projected onto the bracket 8 is marked as a new end mark line, which serves as the basis for adjusting the driving stroke of the drive unit in the guide vane adjustment mechanism, thereby realizing precise control of the deflection angle of the inlet guide vane by the guide vane adjustment mechanism.

[0051] In addition, according to actual needs, the deflection angles of multiple inlet guide vanes 2 can be measured separately based on the above measurement method, so as to improve the measurement accuracy and the adjustment accuracy of the driving stroke of the drive unit.

[0052] The present invention can directly measure the deflection angle of the inlet guide vane 2, thus avoiding the error caused by indirect measurement; at the same time, it also provides measurement precision and accuracy, which is conducive to ensuring the stable operation of the unit.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

Claims

1. A centrifugal compressor inlet guide vane deflection angle measuring and adjusting device, characterized by: It comprises a base (1) and a measuring component; The base (1) is a block-shaped structure, and a set of opposite side surfaces thereof are defined as an A surface (11) and a B surface (12). The A surface (11) is provided with a slot (13) for engaging the inlet guide vane (2), and the internal shape and size of the slot (13) are adapted to the outer side surface of the inlet guide vane (2). The B surface (12) is a plane surface for mounting the measuring assembly and is parallel to the vertical center plane of the inlet guide vane (2). The measuring assembly comprises a main scale (3), a secondary scale (4) and a guide rod (5); The main scale (3) is an arc-shaped structure, one end of which is vertically mounted on the B surface (12) and the other end is suspended in the air; the auxiliary scale (4) includes a base (41) and an auxiliary scale plate (42), both of which are fan-shaped structures; the auxiliary scale plate (42) is fixedly mounted on the base (41), and its radius is smaller than that of the base (41); the auxiliary scale plate (42) is provided with an arc-shaped groove adapted to the main scale (3), and the main scale (3) is provided with an arc-shaped groove adapted to the main scale (3). ) is engaged in the arc groove and is movably connected to the auxiliary scale plate (42) along the circumference of the arc groove; the center of the main scale (3) coincides with the center of the auxiliary scale plate (42) and is located on the B surface (12); the guide rod (5) is located below the auxiliary scale plate (42) and is connected to the base (41) near the end of the main scale plate (3) that is suspended in the air; one end of the guide rod (5) is in contact with the B surface (12), and the other end extends out of the auxiliary scale plate (42).

2. The centrifugal compressor inlet guide vane deflection angle measuring and adjusting device according to claim 1, characterized in that: The lower surface of the main scale (3) is provided with an arc-shaped slot (31) coaxial with the main scale, and a rack (32) is installed on the side wall of the arc-shaped slot (31); a knob (43) is installed at a corresponding position on the bottom of the base (41), one end of the knob (43) extends into the arc-shaped slot (31) and is provided with a gear meshing with the rack (32); the other end of the knob (43) extends out of the base (41) for rotation operation, so that the main scale (3) and the auxiliary scale (42) are movably connected.

3. The centrifugal compressor inlet guide vane deflection angle measuring and adjusting device according to claim 2, characterized in that: The guide rod (5) and the base (41) are connected via a clamping seat (6); the clamping seat (6) is a U-shaped structure, and the open end of the U-shaped structure passes through the guide rod (5) and is connected to the base (41).

4. The centrifugal compressor inlet guide vane deflection angle measuring and adjusting device according to claim 1, 2 or 3, characterized in that: The roughness requirement of the inner surface of the slot (13) is Ra1.6 to Ra3.

2.

5. The centrifugal compressor inlet guide vane deflection angle measuring and adjusting device according to claim 4, characterized in that: One end of the main scale (3) is vertically mounted on the B surface (12) via a support seat (7).

6. The centrifugal compressor inlet guide vane deflection angle measuring and adjusting device according to claim 5, characterized in that: The accuracy of the main scale (3) is 1 degree; The accuracy of the auxiliary scale plate (42) is Spend.

7. The centrifugal compressor inlet guide vane deflection angle measuring and adjusting device according to claim 6, characterized in that: The base (41) and the auxiliary scale plate (42) are an integrated structure.

8. A method for measuring and adjusting the deflection angle of the inlet guide vanes of a centrifugal compressor, characterized in that: The following steps are involved: Step 1: pre-install all inlet guide vanes (2) on a bracket (8) at the inlet of a centrifugal compressor and connect it to a guide vane adjustment mechanism so that the vertical center plane of each inlet guide vane (2) coincides with the corresponding initial marking line on the bracket (8); Step 2: Assemble the centrifugal compressor inlet guide vane deflection angle measuring and adjusting device according to any one of claims 1 to 7, and clamp the A surface (11) of the base (1) to any inlet guide vane (2) so that the side edge of the guide rod (5) coincides with the tangential marking line perpendicular to the initial marking line of the inlet guide vane (2); Step 3: Manually rotate the inlet guide vane (2) until its vertical mid-plane coincides with the corresponding end mark line on the bracket (8). At the same time, the main scale (3) moves relative to the auxiliary scale (42) to generate an angle value, which is read and recorded. Step 4: Compare the angle value obtained in step 3 with the preset angle value, and determine whether the error between the two meets the design requirements. If not, adjust the relative position of the main scale (3) and the auxiliary scale (42) according to the error size, thereby adjusting the angle of the inlet guide vane (2) until it reaches the preset angle value; if it meets the requirements, the measurement and adjustment of the deflection angle of the inlet guide vane of the centrifugal compressor is completed.

9. The method for measuring and adjusting the deflection angle of the inlet guide vanes of a centrifugal compressor according to claim 8, characterized in that: In step 4, when adjusting the relative position of the main scale (3) and the auxiliary scale (42), the inlet guide vane (2) connected to the base (1) rotates at the same time and its vertical center plane moves. When the adjustment is completed, the line of the vertical center plane of the inlet guide vane (2) projected on the bracket (8) is marked as a new end mark line, which serves as the basis for adjusting the driving stroke of the drive unit in the guide vane adjustment mechanism.

10. The method for measuring and adjusting the deflection angle of the inlet guide vanes of a centrifugal compressor according to claim 8, characterized in that: In step 4, the design requirement error is ≤0.5°.

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