Tool for measuring profile size of screw rotor

Abstract

The utility model provides a screw rotor molded line dimension measuring tool, which comprises a rotor and a measuring assembly for measuring rotor molded line deviation, and is characterized in that the rotor comprises a peripheral surface, and a first molded surface and a second molded surface which are positioned on two sides of the peripheral surface; the measuring assembly comprises a first fixing frame positioned on the outer side of the rotor, a second fixing frame transversely installed on the first fixing frame and a measurer perpendicularly installed at one end of the second fixing frame, and a measuring part of the measurer abuts against the second molded surface of the rotor. The measuring assembly is abutted against the qualified rotor by taking the rotor with the qualified molded line size measurement as the reference, so that the measuring device is zeroed after the measuring part of the measuring device is completely abutted against the molded surface, and after each rotor is produced, the measuring assembly can be used for quickly measuring the deviation value between the rotor produced subsequently and the qualified rotor, so that the measurement accuracy is improved. Therefore, a problem of low detection efficiency in batch production can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotor measurement, in particular to a screw rotor profile size measuring tool. Background Art

[0002] In rotating machinery such as screw compressors, the design and optimization of the rotor profile directly affects the volumetric efficiency, leakage loss and operating stability of the compressor. An excellent rotor profile design can effectively reduce leakage loss and improve mechanical efficiency while ensuring gas compression efficiency. Therefore, accurate measurement of the rotor profile is not only a test of the rotor design quality, but also an important basis for optimizing and improving mechanical performance. In the prior art, the rotor profile is generally measured by traditional measurement methods such as the template method and the micrometer method, as well as modern measurement technologies such as the laser scanning method and the three-coordinate measurement method. The traditional measurement methods have insufficient measurement accuracy, and the modern measurement methods have low measurement efficiency.

[0003] Chinese patent CN215217455U discloses a screw rotor profile margin measuring device, comprising: a rotor to be measured, a reference rotor, a first top group, a second top group and a center distance adjustment mechanism; the rotor to be measured is clamped between two tops of the first top group, and the reference rotor is clamped between two tops of the second top group; the center distance adjustment mechanism is used to adjust the center distance between the reference rotor and the rotor to be measured. The above-mentioned screw rotor profile margin measuring device is simple to operate, has high measurement efficiency and low cost.

[0004] However, this technical solution has the following problems: it requires the male and female rotors to be adjusted to mesh before measurement, which is complicated to operate and has low detection efficiency, and is not suitable for dimensional detection during mass production. Utility Model Content

[0005] The purpose of the utility model is to provide a screw rotor profile dimension measuring tool to address the deficiencies in the prior art. The tool uses a rotor with qualified profile dimension measurement as a reference, a measuring component is abutted against the qualified rotor, and the measuring device is zeroed after the measuring part of the measuring device is completely abutted against the profile surface. After each rotor is produced, the measuring component can be used to quickly measure the deviation value between the subsequently produced rotor and the qualified rotor to detect whether the rotor is qualified, thereby solving the problem of low detection efficiency during mass production.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A screw rotor profile dimension measuring tool comprises a rotor and a measuring assembly for measuring the rotor profile deviation, wherein the rotor is a screw rotor, comprising an outer peripheral surface and a first profile and a second profile located on both sides of the outer peripheral surface, and the measuring assembly comprises a first fixing frame positioned outside the rotor, a second fixing frame laterally mounted on the first fixing frame, and a measuring instrument vertically mounted on one end of the second fixing frame, wherein the measuring portion of the measuring instrument abuts against the second profile of the rotor.

[0008] Preferably, the first fixing frame is L-shaped, and comprises a first positioning portion positioned on the first profile surface and a second positioning portion positioned on the outer peripheral surface.

[0009] Preferably, the first positioning portion and the second positioning portion are provided with a plurality of positioning members against which the rotor abuts.

[0010] As a preference, the abutting portion between the positioning member and the rotor is spherical.

[0011] Preferably, the first positioning portion and the second positioning portion are each provided with at least two positioning members, and a line connecting the positioning members of the first positioning portion is not parallel to a line connecting the positioning members of the second positioning portion.

[0012] As a preference, the second fixing frame is mounted on the second positioning portion and is parallel to the second positioning portion.

[0013] As a preference, the measuring instrument is a lever dial indicator, and its measuring part is arranged at the bottom of the measuring instrument.

[0014] As a preference, it further comprises a machine platform, and the rotor is horizontally rotatably connected to the machine platform.

[0015] As a preference, a first fixture and a second fixture for positioning the rotor are installed on the machine platform, and two ends of the rotor are respectively installed on the first fixture and the second fixture.

[0016] As a preference, the first clamp is an active end, and the second clamp is a passive end.

[0017] The beneficial effects of the utility model are:

[0018] (1) The utility model uses a rotor with qualified profile size measurement as a reference, places the measuring device on a qualified rotor, and adjusts the measuring device to zero after the measuring device contacts the profile surface. After each rotor is produced, the measuring component can be used to quickly measure the deviation between the subsequently produced rotor and the qualified rotor to detect whether the rotor is qualified, thereby solving the problem of low detection efficiency during mass production.

[0019] (2) The utility model adopts the design of the L-shaped first fixing frame, and provides a spherical positioning member at its first positioning portion and the second positioning portion, so as to accurately position the rotor in the tooling and ensure the consistency of measurement.

[0020] (3) The utility model provides a measuring assembly, and the measuring instrument is a lever dial indicator, which can achieve accurate measurement of the profile size of the screw rotor. The measuring part provided at the bottom of the lever dial indicator abuts against the second profile of the rotor, and can accurately capture the deviation of the profile.

[0021] (4) The utility model adjusts the first clamp and the second clamp, and the tooling can adapt to rotors of different lengths and diameters, and has strong versatility.

[0022] In summary, the utility model has the advantages of high efficiency, stability, small deviation, and wide general range, and can effectively improve the measurement accuracy and efficiency of the screw rotor profile size. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the rear structure of the measuring component of the utility model;

[0025] Figure 3 This is a schematic diagram of the front structure of the measuring component of the utility model. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0028] Embodiment 1

[0029] like Figure 1-3 As shown, this embodiment provides a screw rotor profile dimension measuring tool, including a rotor 1 and a measuring assembly 2 for measuring the profile deviation of the rotor 1. The rotor 1 is a screw rotor, which includes an outer peripheral surface 11 and a first profile 12 and a second profile 13 located on both sides of the outer peripheral surface 11. The first profile 12 is a concave surface, and the second profile 13 is a convex surface. The measuring assembly 2 includes a first fixing frame 21 positioned outside the rotor 1, a second fixing frame 22 installed transversely on the first fixing frame 21, and a measuring device 23 installed vertically at one end of the second fixing frame 22, and the measuring portion 231 of the measuring device 23 abuts against the second profile 13 of the rotor 1.

[0030] It should be noted that the utility model is mainly used to measure the deviation of the line size of each rotor 1 when the machine tool mass produces rotors 1. In the production process, the factor that has the greatest impact on the deviation of the line size of the rotor 1 is the wear of the tool after long-term use. Generally speaking, the later the rotor 1 is produced, the greater the deviation of the size. Therefore, in this embodiment, the rotor 1 used as the reference is selected from the first batch of rotors 1 in each batch production. The dimensions of each part of the rotor 1 are measured using methods such as three-coordinate measurement, and an engagement test is performed. If all the dimensions meet the standards and can be fully engaged and meet the design requirements, the measuring component 2 is used to select several points of the line size of the fixed pitch part for measurement. The rotor 1 can be used as a reference to measure the line deviation of the same part of the rotor 1 produced subsequently.

[0031] By taking the qualified rotor 1 measured by the profile dimension as a reference, the measuring component 2 is abutted against the qualified rotor 1, and the measuring part 231 of the measuring device 23 is abutted against the profile surface, and then the measuring device 23 is zeroed. After each rotor 1 is produced, the measuring component 2 can be used to quickly measure the deviation value between the subsequently produced rotor 1 and the qualified rotor 1 to detect whether the rotor 1 is qualified, thereby solving the problem of low detection efficiency during mass production.

[0032] like Figure 2 , 3 As shown, the first fixing frame 21 is L-shaped, and includes a first positioning portion 211 positioned on the first profile 12 and a second positioning portion 212 positioned on the outer peripheral surface 11. The first positioning portion 211 and the second positioning portion 212 are provided with a plurality of positioning members 24 abutting against the rotor 1, and the positioning members 24 are threadedly connected to the first fixing frame 21 for easy adjustment. The abutting portion of the positioning member 24 and the rotor 1 is spherical, preferably a ruby ​​positioning bead.

[0033] By selecting ruby ​​positioning beads as the material of the positioning member 24 , the positioning member 24 is more wear-resistant and can protect the rotor surface. In addition, the threaded connection between the positioning member 24 and the first fixing frame 21 facilitates the adjustment of the positioning member 24 .

[0034] like Figure 3 As shown, the first positioning portion 211 and the second positioning portion 212 are each provided with at least two positioning members 24, and the connecting line between the positioning members 24 of the first positioning portion 211 is not parallel to the connecting line between the positioning members 24 of the second positioning portion 212. In this embodiment, the first positioning portion 211 is provided with two positioning members 24 and the second positioning portion 212 is provided with three positioning members 24.

[0035] Through the design of the L-shaped first fixing frame 21 and the arrangement of the spherical positioning member 24 on the first positioning portion 211 and the second positioning portion 212 thereof, the rotor 1 can be accurately positioned in the tooling to ensure measurement consistency.

[0036] like Figure 2 As shown, the second fixing frame 22 is installed on the second positioning portion 212 and is parallel to the second positioning portion 212 .

[0037] like Figure 2 , 3 As shown, the measuring instrument 23 is a lever dial indicator, and its measuring part 231 is arranged at the bottom of the measuring instrument 23.

[0038] By setting up the measuring component 3 and selecting the measuring device 23 as a lever dial indicator, the accurate measurement of the profile size of the screw rotor 1 can be achieved. The measuring part 231 set at the bottom of the lever dial indicator abuts against the second profile 13 of the rotor 1, which can accurately capture the deviation of the profile.

[0039] like Figure 1 As shown, it also includes a machine table 3, and the rotor 1 is horizontally rotatably connected to the machine table 3. The machine table 3 is equipped with a first fixture 31 and a second fixture 32 for positioning the rotor 1, and the two ends of the rotor 1 are respectively installed on the first fixture 31 and the second fixture 32. The first fixture 31 is the active end, preferably a chuck, and the second fixture 32 is the driven end, preferably a top. It should be noted that this embodiment can not only directly measure the profile size of the rotor 1, but also measure its profile when the rotor 1 is processed and has not been disassembled from the machine table 1, that is, when the rotor is fixed on the first fixture 31 and the second fixture 32, the profile deviation of its fixed pitch part can be measured.

[0040] By adjusting the first clamp 31 and the second clamp 32 , the tooling can adapt to rotors of different lengths and diameters, and has strong versatility.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A screw rotor profile dimension measuring tool, characterized in that: The invention comprises a rotor and a measuring assembly for measuring the deviation of the rotor profile, wherein the rotor comprises an outer peripheral surface and a first profile and a second profile located on both sides of the outer peripheral surface, and the measuring assembly comprises a first fixing frame positioned on the outer side of the rotor, a second fixing frame laterally mounted on the first fixing frame, and a measuring instrument vertically mounted on one end of the second fixing frame, wherein the measuring portion of the measuring instrument abuts against the second profile of the rotor.

2. The screw rotor profile dimension measuring tool according to claim 1, characterized in that: The first fixing frame is L-shaped and includes a first positioning portion positioned on the first profile surface and a second positioning portion positioned on the outer peripheral surface.

3. The screw rotor profile dimension measuring tool according to claim 2, characterized in that: The first positioning portion and the second positioning portion are provided with a plurality of positioning members against which the rotor abuts.

4. The screw rotor profile dimension measuring tool according to claim 3, characterized in that: The abutting portion of the positioning member and the rotor is spherical.

5. The screw rotor profile dimension measuring tool according to claim 3, characterized in that: The first positioning portion and the second positioning portion are both provided with at least two positioning members, and a line connecting the positioning members of the first positioning portion is not parallel to a line connecting the positioning members of the second positioning portion.

6. The screw rotor profile dimension measuring tool according to claim 2, characterized in that: The second fixing frame is installed on the second positioning portion and is parallel to the second positioning portion.

7. The screw rotor profile dimension measuring tool according to claim 1, characterized in that: The measuring instrument is a lever dial indicator, and the measuring part thereof is arranged at the bottom of the measuring instrument.

8. A screw rotor profile dimension measuring tool according to any one of claims 1 to 7, characterized in that: It also includes a machine platform, and the rotor is horizontally rotatably connected to the machine platform.

9. A screw rotor profile dimension measuring tool according to claim 8, characterized in that: The machine platform is provided with a first fixture and a second fixture for positioning the rotor, and two ends of the rotor are respectively installed on the first fixture and the second fixture.

10. A screw rotor profile dimension measuring tool according to claim 9, characterized in that: The first fixture is an active end, and the second fixture is a passive end.

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