Probe adjusting mechanism for testing interstage performance of fluid machinery
By designing a probe adjustment mechanism with slip ring and rack in the performance test of fluid mechanical stages, the problem of uncertainty in the judgment of the overall performance of fluid machinery in the prior art is solved, and more accurate performance measurement and judgment are achieved.
Patent Information
- Application Number
- CN202420184610.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-25
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-01-25
AI Technical Summary
The existing inter-stage performance tests of fluid machinery are only measured for specific locations and regions, resulting in great uncertainty in the overall performance of fluid machinery.
A probe adjustment mechanism for fluid mechanical performance testing is designed. By installing a slip ring and rack in the blade bearing cylinder, the power source drive gear makes the rack push the probe bracket and slide ring to rotate, thereby adjusting the probe measurement angle, thereby measuring the parameters of different flow field areas.
By adjusting the position of the probe, the performance parameters between the fluid mechanical stages can be measured more accurately, which improves the accuracy of judging the overall performance of the fluid mechanical.
Smart Images
Figure CN222561316U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a probe adjusting mechanism, in particular to a probe adjusting mechanism used for inter-stage performance testing of fluid machinery. Background Art
[0002] With the advancement and development of science and technology, fluid machinery design pays more and more attention to high efficiency and high pressure ratio. Usually, in order to meet higher design standards, fluid machinery equipment needs to be continuously optimized and upgraded, which requires continuous fluid machinery performance testing to evaluate whether it meets the design requirements.
[0003] At present, fluid machinery performance tests are mainly divided into two categories: internal inter-stage performance tests and external flow field performance tests. The external flow field performance tests detect aspects such as inlet and outlet flow velocity, pressure, noise and vibration; the inter-stage performance tests evaluate parameters such as temperature, pressure, flow rate, airflow angle, efficiency, and power between fluid machinery stages (adjacent moving blades and stationary blades); through fluid machinery performance tests, the fluid machinery structure can be optimized and upgraded to improve its efficiency.
[0004] However, the current inter-stage performance test of fluid machinery only measures parameters in a specific location area. There is a certain uncertainty in judging the overall performance of the fluid machinery based only on the obtained parameters in the specific location area. Utility Model Content
[0005] The purpose of the utility model is to solve the technical problem that the inter-stage performance test of the existing fluid machinery in the prior art only measures the parameters of the specific position area between the stages, and the overall performance of the fluid machinery is judged only based on the parameters obtained in the specific position area, which has a large uncertainty, and to provide a probe adjustment mechanism for the inter-stage performance test of the fluid machinery.
[0006] In order to solve the above technical problems, the technical solutions provided by the utility model are as follows:
[0007] A probe adjustment mechanism for testing the interstage performance of fluid machinery, wherein the probe is used to test the flow field parameters in a blade bearing cylinder, and a slip ring is installed on the inner wall of the blade bearing cylinder, and the slip ring can rotate relative to the blade bearing cylinder; the special feature of the mechanism is that:
[0008] It includes a probe bracket fixedly mounted on the slip ring, and a base fixedly mounted on the blade bearing cylinder;
[0009] The probe bracket is provided with a plurality of probe mounting holes penetrating the probe bracket, a probe is slidably mounted in the probe mounting hole, and one end of the probe penetrates the slip ring and extends into the interior of the slip ring;
[0010] A rack with an arc shape is fixedly installed on the probe bracket, and the rack is coaxially arranged with the slip ring; a gear is installed on the base through a rotating shaft, the gear is fixedly connected to the rotating shaft, and the gear is meshed with the rack;
[0011] A driving source is provided at one end of the rotating shaft for driving the gear to rotate, so that the rack meshing with the gear pushes the probe bracket to drive the slip ring to rotate in the blade bearing cylinder to adjust the position of the probe.
[0012] Furthermore, the power source includes a motor base, a drive motor mounted on the motor base and a turbine reducer, the output shaft of the drive motor is connected to the input shaft of the turbine reducer through a coupling, and the output shaft of the turbine reducer is connected to the rotating shaft.
[0013] Furthermore, an angle ruler is arranged on the blade bearing cylinder, and the minimum scale of the angle ruler is 1°; and a pointer matched with the angle ruler is arranged on the probe bracket.
[0014] Furthermore, the maximum rotation angle of the slip ring in the blade bearing cylinder is 120°.
[0015] Further, the rack is connected to the probe bracket by a plurality of first bolts;
[0016] The probe bracket is connected to the slip ring via a plurality of second bolts.
[0017] Furthermore, a plurality of O-rings are provided between the probe mounting hole and the probe.
[0018] Furthermore, the probe bracket adopts a hollow structure.
[0019] Compared with the prior art, the utility model has the following beneficial effects:
[0020] The probe adjustment mechanism for fluid machinery interstage performance testing provided by the utility model connects the rack to the probe bracket installed on the slip ring. Since the rack is in an arc shape and the rack and the slip ring are coaxially arranged, the gear driven by the power source moves the rack meshing with the gear, and further drives the slip ring to rotate in the blade bearing cylinder, so as to adjust the measuring angle of the probe installed in the probe mounting hole. This adjustment method can realize parameter measurement of different flow field areas, so as to judge the overall performance of the fluid machinery with the measurement results, and improve the accuracy of the fluid machinery test performance judgment. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;
[0022] Figure 2 It is a schematic cross-sectional view of the utility model along the axis of one of the probe mounting holes;
[0023] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure along the section line AA;
[0024] Explanation of the reference numerals: 1-slip ring, 2-blade bearing cylinder, 3-probe bracket, 31-probe mounting hole, 4-rack, 5-base, 6-gear, 7-shaft, 8-angle ruler, 9-pointer, 10-turbine reducer, 11-drive motor, 12-first bolt, 13-second bolt, 14-motor seat, 15-coupling. DETAILED DESCRIPTION
[0025] The following will be combined with the accompanying drawings 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.
[0026] This embodiment relates to a probe adjustment mechanism for field testing of a primary fluid machinery, wherein the fluid machinery is a compressor. The blade bearing cylinder 2 is responsible for supporting the stationary blades and serves as a passage for the airflow during the compression process. The slip ring 1 is embedded in the blade bearing cylinder 2 and rotates inside it. The probe is a high-end precision electronic component that contacts the object to be tested through the probe head to achieve current transfer and measurement of the object to be tested.
[0027] like Figure 1 and Figure 2 As shown, a probe adjustment mechanism for fluid machinery interstage performance testing, the probe is used to test the flow field parameters in the blade bearing cylinder 2, a slip ring 1 is installed on the inner wall of the blade bearing cylinder 2, the slip ring 1 can rotate relative to the blade bearing cylinder 2, and the maximum rotation angle of the slip ring 1 in the blade bearing cylinder 2 is 120°. It includes a probe bracket 3 installed on the slip ring 1 through a plurality of second bolts 13, and a base 5 fixedly installed on the blade bearing cylinder 2.
[0028] In order to prevent the gas in the flow channel from leaking to the outside through the joint surface of the slip ring 1 and the blade bearing cylinder 2, and to avoid the slip ring 1 from generating a large friction during the rotation of the blade bearing cylinder 2, an O-ring is used between the slip ring 1 and the blade bearing cylinder 2.
[0029] like Figure 3 As shown, the probe bracket 3 is provided with a plurality of probe mounting holes 31 penetrating the probe bracket 3, a probe is slidably mounted in the probe mounting hole 31, two O-rings are arranged between the probe mounting hole 31 and the probe, one end of the probe penetrates the slip ring 1 and extends into the interior of the slip ring 1; at the same time, the compression amount of the O-ring is required to not hinder the radial movement of the probe, but also to prevent the fluid from leaking outward.
[0030] A rack 4 with an arc shape is fixedly mounted on the probe bracket 3, and the rack 4 is coaxially arranged with the slip ring 1; a plurality of first bolts 12 can ensure the coaxiality of the rack 4 and the slip ring 1. A gear 6 is mounted on the base 5 through a rotating shaft 7, the gear 6 is fixedly connected to the rotating shaft 7, and the gear 6 is meshed with the rack 4; a driving source is arranged at one end of the rotating shaft 7, which is used to drive the gear 6 to rotate, so that the rack 4 meshed with the gear 6 pushes the probe bracket 3 to drive the slip ring 1 to rotate in the blade bearing cylinder 2, so as to adjust the position of the probe.
[0031] like Figure 1 and Figure 3 As shown, the power source includes a motor base 14, a drive motor 11 mounted on the motor base 14, and a worm reducer 10. The output shaft of the drive motor 11 is connected to the input shaft of the worm reducer 10 through a coupling 15, and the output shaft of the worm reducer 10 is connected to the rotating shaft 7.
[0032] like Figure 1 As shown, an angle ruler 8 is provided on the blade support cylinder 2, and the minimum scale of the angle ruler 8 is 1°; a pointer 9 adapted to the angle ruler 8 is provided on the probe bracket 3. When the probe rotates with the probe bracket 3, the rotation angle of the probe in the circumferential direction of the blade support cylinder 2 can be judged by observing the angle on the scale ruler 8 corresponding to the pointer 9.
[0033] like Figure 3 As shown, the probe bracket 3 adopts a hollow structure, which reduces the weight of the probe bracket 3 and reduces the friction of the slip ring 1 rotating in the blade bearing cylinder 2; at the same time, the hollow structure also makes it easy to observe the probe position.
[0034] In other embodiments of the present invention, multiple sets of probe adjustment mechanisms can be used in series to achieve multi-level measurement.
[0035] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or replacements within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A probe adjustment mechanism for testing inter-stage performance of fluid machinery, wherein the probe is used to test flow field parameters in a blade bearing cylinder (2), a slip ring (1) is installed on the inner wall of the blade bearing cylinder (2), and the slip ring (1) can rotate relative to the blade bearing cylinder (2); characterized in that: It comprises a probe bracket (3) fixedly mounted on a slip ring (1), and a base (5) fixedly mounted on a blade bearing cylinder (2); The probe bracket (3) is provided with a plurality of probe mounting holes (31) penetrating the probe bracket (3), a probe is slidably mounted in the probe mounting hole (31), and one end of the probe penetrates the slip ring (1) and extends into the interior of the slip ring (1); A rack (4) having an arc-shaped appearance is fixedly mounted on the probe bracket (3), and the rack (4) and the slip ring (1) are arranged coaxially; a gear (6) is mounted on the base (5) via a rotating shaft (7), the gear (6) is fixedly connected to the rotating shaft (7), and the gear (6) is meshed with the rack (4); A power source is provided at one end of the rotating shaft (7) for driving the gear (6) to rotate, so that the rack (4) meshing with the gear (6) pushes the probe bracket (3) to drive the slip ring (1) to rotate in the blade bearing cylinder (2) to adjust the position of the probe.
2. The probe adjustment mechanism for fluid machinery inter-stage performance testing according to claim 1, characterized in that: The power source comprises a motor base (14), a driving motor (11) mounted on the motor base (14) and a turbine reducer (10); the output shaft of the driving motor (11) is connected to the input shaft of the turbine reducer (10) via a coupling (15); and the output shaft of the turbine reducer (10) is connected to the rotating shaft (7).
3. The probe adjustment mechanism for fluid machinery inter-stage performance testing according to claim 2, characterized in that: The blade bearing cylinder (2) is provided with an angle ruler (8), the minimum scale of the angle ruler (8) being 1°; and the probe bracket (3) is provided with a pointer (9) adapted to the angle ruler (8).
4. The probe adjustment mechanism for fluid machinery inter-stage performance testing according to claim 3, characterized in that: The maximum rotation angle of the slip ring (1) in the blade bearing cylinder (2) is 120°.
5. The probe adjustment mechanism for fluid machinery inter-stage performance testing according to claim 4, characterized in that: The rack (4) is connected to the probe bracket (3) via a plurality of first bolts (12); The probe bracket (3) is connected to the slip ring (1) via a plurality of second bolts (13).
6. The probe adjustment mechanism for fluid machinery inter-stage performance testing according to claim 5, characterized in that: A plurality of O-type sealing rings are arranged between the probe installation hole (31) and the probe.
7. The probe adjustment mechanism for fluid machinery inter-stage performance testing according to claim 6, characterized in that: The probe bracket (3) adopts a hollow structure.