Flow test device for asymmetric face double-pass small orifice nozzle

Abstract

A flow test device for asymmetric face double-channel small aperture nozzle, including lower oil nozzle, back baffle, front baffle and upper oil nozzle, through the matching structure design of lower oil nozzle and upper oil nozzle to the front casing inlet fairing nozzle to be tested, the nozzle can be quickly and accurately positioned, and the front casing inlet fairing nozzle can be fixed, the small aperture nozzle on the two asymmetric faces of the front casing inlet fairing nozzle can be measured at the same time, the problem that the conventional measuring tool cannot measure the flow of the nozzle on the asymmetric face at the same time is solved, the work efficiency is improved, and the work quality is improved, which can well meet the use demand of nozzle flow test.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine component testing technology, specifically relating to a flow testing device for an asymmetric dual-channel small-diameter nozzle. Background Technology

[0002] A new type of aero-engine front casing requires flow rate testing of the nozzles of the front casing inlet rectifier. Due to the small size of the nozzles and the difficulty in simultaneously measuring small-diameter nozzles on two asymmetrical surfaces, securing them securely is challenging. Patent document CN104483133B discloses a fixture and its mounting method for testing the angle of aero-engine nozzles. The purpose is to facilitate angle testing before nozzle assembly for inclined elbow nozzles without a horizontal reference. It uses multiple fixing methods to prevent nozzle vibration during testing. However, securing small-diameter nozzles on the two asymmetrical surfaces of the front casing rectifier nozzle is difficult. In addition, patent document CN213872683U discloses a fuel nozzle flow rate adjustment device, which adopts an inclined surface contact structure, uses a "C"-shaped base, and sets the angle between the inclined surface and the mounting surface to an acute angle. Then, the fuel nozzle to be tested is fixed on the inclined surface, which realizes easy disassembly and multi-performance testing of a single tester. However, due to structural limitations, it cannot complete the flow rate test of dual-channel casing-type parts. Therefore, it is necessary to design an asymmetric dual-channel small-aperture nozzle flow rate test device and measurement method to meet the flow rate test requirements of the front casing of a new type of aero-engine for the front casing inlet rectifier nozzle. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a flow testing device for an asymmetric dual-channel small-diameter nozzle.

[0004] The present invention is achieved through the following technical solutions.

[0005] This invention provides a flow testing device for an asymmetric dual-channel small-aperture nozzle, comprising a lower oil inlet, a rear baffle, a front baffle, and an upper oil inlet. The lower oil inlet has a T-shaped structure, with a hollow lower end connected to an oil inlet pipeline. The inner surface of the upper end is a vertical positioning surface for the planar nozzle of the front casing inlet rectifier nozzle, and a positioning groove for the front casing inlet rectifier nozzle is formed in the middle. The front and rear end faces of the lower oil inlet are limiting surfaces for the front casing inlet rectifier nozzle. Inclined grooves with their centers corresponding to the vertical positioning surface of the planar nozzle of the front casing inlet rectifier nozzle are provided on both sides of the lower oil inlet. A boss is provided in the middle of the lower oil inlet for left and right positioning with the upper oil inlet. An oil inlet hole is provided on the inner surface of the upper end of the lower oil inlet and connects to the front casing inlet rectifier nozzle. The plane nozzle axis of the nozzle is coincident. The two ears of the lower nozzle are provided with threaded holes that are consistent with the center of the inclined groove. The upper nozzle is an inverted T-shaped structure with a hollow upper end that connects to the oil inlet pipe. The inner surface of the lower end is in close contact with the inclined surface of the front casing inlet rectifier nozzle. The two sides of the lower inner surface of the upper nozzle are provided with grooves that correspond to the protrusions of the lower nozzle. The axis of the oil inlet hole on the lower inner surface of the upper nozzle is coincident with the axis of the inclined nozzle of the front casing inlet rectifier nozzle. The two ends of the upper nozzle are provided with two through holes that correspond to the threaded holes of the lower nozzle. The rear baffle and the front baffle are both plate-shaped with the same width as the lower nozzle. They are installed on the front and rear sides of the lower nozzle, respectively, and the front casing inlet rectifier nozzle to be tested is held in them.

[0006] Furthermore, the oil inlet on the inner side of the lower oil inlet is a stepped hole, and an O-ring is installed at the step.

[0007] Furthermore, the oil inlet on the lower inner surface of the upper oil inlet is a stepped hole, and an O-ring is installed at the step.

[0008] Furthermore, the inclined groove of the lower oil nozzle forms a 70-degree angle with the upper inner surface of the lower oil nozzle.

[0009] Furthermore, the angle between the inner surface of the lower end of the upper oil nozzle and the horizontal plane of the nozzle of the front casing inlet rectifier is 20 degrees.

[0010] Furthermore, both the front and rear baffles have waist-shaped grooves at the upper middle part.

[0011] Furthermore, it also includes M3 cylindrical head screws. The rear baffle and the front baffle have corresponding threaded holes at both ends. The M3 cylindrical head screws pass through the front baffle, the lower oil nozzle and the rear baffle in sequence and are then connected as a whole.

[0012] Furthermore, it also includes an M5 cylindrical head screw, which passes through the through hole provided at the upper oil nozzle lug end and then enters the threaded hole at the lower oil nozzle lug end to securely connect the upper and lower oil nozzles.

[0013] Furthermore, the upper oil nozzle, lower oil nozzle, rear baffle, and front baffle are all made of 20Cr13 material.

[0014] Furthermore, the required hardness of the upper oil nozzle, lower oil nozzle, rear baffle, and front baffle is HRC33-38.

[0015] The beneficial effects of this invention are as follows: By implementing this invention, the nozzle can be quickly and accurately located and the front casing inlet rectifier nozzle can be fixed. It can simultaneously measure the small-diameter nozzles on two asymmetric surfaces of the front casing inlet rectifier nozzle, solving the problem that conventional measuring tools cannot simultaneously measure the nozzle flow rate on asymmetric surfaces. This improves work efficiency and work quality, and can well meet the usage requirements of nozzle flow rate testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is the present invention. Figure 1 A cross-sectional view;

[0018] Figure 3 This is a schematic diagram of the lower oil nozzle structure of the present invention;

[0019] Figure 4 This is the present invention. Figure 3 A cross-sectional view;

[0020] Figure 5 This is a cross-sectional view of the oil nozzle of the present invention;

[0021] Figure 6 This is a top view of the oil nozzle of the present invention;

[0022] Figure 7 This is a left view of the oil nozzle of the present invention;

[0023] Figure 8 This is a top view of the front baffle of the present invention;

[0024] Figure 9 This is a left view of the front baffle of the present invention;

[0025] Figure 10 This is a top view of the rear baffle of the present invention;

[0026] Figure 11 This is a left view of the rear baffle of the present invention;

[0027] Figure 12 This is a schematic diagram of the structure of the inlet rectifier nozzle of the front casing of the present invention to be tested;

[0028] Figure 13 This is the present invention. Figure 12A cross-sectional view;

[0029] In the diagram: 1-Lower nozzle; 2-Rear baffle; 3-Upper nozzle; 4-M5 cylindrical head screw; 5-M3 cylindrical head screw; 6-Front baffle; 7-O-ring; 10-Front casing inlet rectifier nozzle; 101-Sloping nozzle; 102-Flat nozzle. Detailed Implementation

[0030] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0031] from Figure 12 and Figure 13 It can be seen that when testing the flow rate of the nozzle of the front casing inlet rectifier, the oil inlet must coincide with the nozzle of the front casing inlet rectifier. Based on this principle, the flow rate test device of the asymmetric dual-channel small-diameter nozzle is divided into upper and lower connection forms, as follows.

[0032] like Figure 3-4 As shown, the lower oil nozzle 1 has a T-shaped structure, with a hollow cylinder at the lower end for easy connection to the oil inlet pipe (the hollow inner hole of the cylinder is used for oil passage), and the inner surface of the hollow cylinder at the lower end ( Figure 2 The C-face is the vertical positioning surface (i.e., Z-direction positioning) of the planar nozzle 101 of the front casing inlet rectifier nozzle 10; the lower oil nozzle 1 has an inner groove in the middle for Y-direction positioning of the front casing inlet rectifier nozzle 10, and the front and rear end faces of the lower oil nozzle ( Figure 2 The A and B surfaces in the diagram are the Y-direction limiting surfaces of the front casing inlet rectifier nozzle 10. This is to ensure that the front casing inlet rectifier nozzle 10 and the inner surface of the lower end hollow cylinder of the lower oil nozzle 1 are aligned. Figure 2 The C-face is tightly joined, and the inner surface of the hollow cylinder at the lower end of the lower oil nozzle 1 is ( Figure 2 A stepped hole is provided at the C-face hole for installing an O-ring; to ensure the connection point of the upper oil nozzle of the asymmetric dual-channel small-diameter nozzle flow test device of the present invention ( Figure 4 The intersection point M) and the centerline of the inclined nozzle 101 and the flat nozzle 102 mounted on the front casing inlet rectifier nozzle 10 ( Figure 13 The intersection point P) coincides to ensure accurate positioning of the oil inlet hole of the upper oil nozzle. The lower oil nozzle 1 has inclined grooves on both sides whose centers are adapted to the vertical positioning surface of the planar nozzle 102 of the front casing inlet rectifier nozzle 10, and whose centers are aligned with the inner surface of the hollow cylinder at the lower end of the lower oil nozzle 1. Figure 2The middle C-face is at a 70-degree angle (to ensure that the inclined groove is perpendicular to the inclined nozzle 101), and is also used for positioning the upper oil nozzle 3 to ensure that the oil inlet of the upper oil nozzle 3 coincides with the Y-axis of the inclined nozzle 101; the lower oil nozzle 1 has a boss in the middle part for positioning the upper oil nozzle 3 left and right to ensure that the oil inlet of the upper oil nozzle coincides with the X-axis of the inclined nozzle 101; the lower oil nozzle 1 has two M5 threaded holes at the ear end, which are aligned with the center of the inclined groove, for fixing and pressing the upper oil nozzle.

[0033] like Figure 5-7 As shown, the upper oil nozzle 3 has an inverted T-shaped structure with a hollow cylinder in the middle to facilitate connection to the oil pipe (the hollow inner hole of the cylinder is used for oil passage). The lower inner surface of the upper oil nozzle ( Figure 5 The middle E-side) is in close contact with the 20-degree bevel of the front casing inlet rectifier nozzle 10, to ensure that the front casing inlet rectifier nozzle 10 and the lower inner surface of the upper oil nozzle 3 are in close contact. Figure 5 The middle E surface) is tightly joined, and the lower inner surface of the upper oil nozzle 3 is ( Figure 5 The oil inlet hole (E-side) is designed with a stepped hole for installing an O-ring; the lower inner surface of the upper oil inlet nozzle 3 has grooves on both sides that correspond to the boss of the lower oil inlet nozzle 1, ensuring that the oil inlet hole of the upper oil inlet nozzle 1 coincides with the X-axis of the inclined nozzle 101; the middle part of the upper oil inlet nozzle 3 is matched with the inclined groove of the lower oil inlet nozzle 1 to ensure that the axis of the oil inlet hole of the upper oil inlet nozzle 3 coincides with the axis of the inclined nozzle 101; the two ears on both sides of the upper oil inlet nozzle 3 are provided with two holes for screws to press the upper oil inlet nozzle onto the lower oil inlet nozzle.

[0034] Specifically, such as Figure 1-7 and Figure 12-13As shown, a flow testing device for an asymmetric dual-channel small-aperture nozzle includes a lower oil nozzle 1, a rear baffle 2, a front baffle 6, and an upper oil nozzle 3. The lower oil nozzle 1 has a T-shaped structure with a hollow lower end, connecting to an oil inlet pipe. The inner surface of the upper end of the lower oil nozzle 1 is a vertical positioning surface for the planar nozzle 102 of the front casing inlet rectifier nozzle 10, and a positioning groove for the front casing inlet rectifier nozzle 10 is opened in the middle. The front and rear end faces of the lower oil nozzle 1 are limiting surfaces for the front casing inlet rectifier nozzle 10. The lower oil nozzle 1 has inclined grooves on both sides with the center corresponding to the vertical positioning surface of the planar nozzle 101 of the front casing inlet rectifier nozzle 10. A boss is provided on the middle of the lower oil nozzle 1 for left and right positioning with the upper oil nozzle 3. The oil inlet hole on the inner surface of the upper end of the lower oil nozzle 1 coincides with the axis of the planar nozzle of the front casing inlet rectifier nozzle 10. The two ears of the lower oil nozzle 1 are aligned with the center of the inclined grooves. The threaded hole; the upper oil nozzle 3 has an inverted T-shaped structure, with a hollow upper end for connecting the oil pipe, and the inner surface of the lower end tightly fitting the inclined surface of the front casing inlet rectifier nozzle 10. The lower inner surface of the upper oil nozzle 3 has grooves on both sides corresponding to the bosses on the lower oil nozzle 1. The axis of the oil hole on the lower inner surface of the upper oil nozzle 3 coincides with the axis of the inclined nozzle 101 of the front casing inlet rectifier nozzle 10; the inclined groove on the lower oil nozzle 1 corresponds to the lower oil nozzle... The upper inner surface of the upper part of the nozzle 1 forms an angle of 70 degrees, and the lower inner surface of the upper nozzle 3 forms an angle of 20 degrees with the horizontal plane of the front casing inlet rectifier nozzle 10. The upper nozzle 3 has two through holes at both ends that correspond to the threaded holes of the lower nozzle 1, and also includes an M5 cylindrical head screw 4. The M5 cylindrical head screw 4 passes through the through hole at the ear end of the upper nozzle 3 and enters the threaded hole at the ear end of the lower nozzle 1, thus fastening the upper nozzle 3 and the lower nozzle 1 together.

[0035] like Figure 8-10 and Figure 1 As shown, both the rear baffle 2 and the front baffle 6 are sheet-like, with the same width as the lower oil nozzle 1. They are installed on the front and rear sides of the lower oil nozzle 1, respectively, and the front casing inlet rectifier nozzle 10 to be tested is held in them. The front baffle 2 and the front baffle 6 are provided with corresponding threaded holes at both ends. The M3 cylindrical head screws 5 pass through the front baffle 6, the lower oil nozzle 1 and the rear baffle 2 in sequence and are connected as a whole. The upper middle part of the front baffle 6 and the rear baffle 2 are both provided with waist-shaped grooves to facilitate the observation of the oil nozzle installation.

[0036] like Figure 2 As shown, the oil inlet hole on the upper inner side of the lower oil inlet 1 is a stepped hole, and the oil inlet hole on the lower inner surface of the upper oil inlet 3 is a stepped hole. O-rings 7 are installed at the steps.

[0037] The upper oil nozzle 3, the lower oil nozzle 1, the rear baffle 2, and the front baffle 6 are all made of 20Cr13 material, and the required hardness is HRC33-38.

[0038] When in use, insert the test end of the front casing inlet rectifier nozzle 10 into the corresponding position of this device, so that the inclined nozzle 101 and the flat nozzle 102 are respectively connected to the oil inlet holes of the upper oil inlet nozzle 3 and the lower oil inlet nozzle 1, tighten the M5 cylindrical head screw 4 and the M3 cylindrical head screw 5, and then perform the nozzle flow test.

Claims

1. A flow rate testing device for an asymmetric dual-channel small-aperture nozzle, characterized in that: Includes a lower oil nozzle, a rear baffle, a front baffle, and an upper oil nozzle; The lower oil nozzle has a T-shaped structure with a hollow lower end for connecting to the oil inlet pipe. The inner surface of the upper end is the vertical positioning surface of the planar nozzle of the front casing inlet rectifier nozzle. A positioning groove for the front casing inlet rectifier nozzle is opened in the middle. The front and rear end faces of the lower oil nozzle are the limiting surfaces of the front casing inlet rectifier nozzle. The lower oil nozzle has inclined grooves on both sides with the center corresponding to the vertical positioning surface of the planar nozzle of the front casing inlet rectifier nozzle. A boss is provided in the middle of the lower oil nozzle for left and right positioning with the upper oil nozzle. The oil inlet hole on the inner surface of the upper end of the lower oil nozzle coincides with the axis of the planar nozzle of the front casing inlet rectifier nozzle. The two ears of the lower oil nozzle have threaded holes that are consistent with the center of the inclined grooves. The upper oil nozzle has an inverted T-shaped structure with a hollow upper end for connecting the oil inlet pipe. The inner surface of the lower end is in close contact with the bevel of the nozzle of the front casing inlet rectifier. The lower inner surface of the upper oil nozzle has grooves on both sides that correspond to the protrusions of the lower oil nozzle. The axis of the oil inlet hole on the lower inner surface of the upper oil nozzle coincides with the axis of the bevel nozzle of the front casing inlet rectifier. The two ends of the upper oil nozzle have two through holes that correspond to the threaded holes of the lower oil nozzle. Both the rear and front baffles are sheet-like, with the same width as the lower oil inlet. They are installed on the front and rear sides of the lower oil inlet, respectively, and the nozzle of the front casing inlet rectifier to be tested is held in them.

2. The flow testing apparatus for an asymmetric dual-channel small-aperture nozzle as described in claim 1, characterized in that: The oil inlet on the upper inner side of the lower oil inlet is a stepped hole, and an O-ring is installed at the step.

3. The flow testing apparatus for an asymmetric dual-channel small-aperture nozzle as described in claim 1, characterized in that: The oil inlet on the lower inner surface of the upper oil inlet is a stepped hole, and an O-ring is installed at the step.

4. The flow testing apparatus for an asymmetric dual-channel small-aperture nozzle as described in claim 1, characterized in that: The inclined groove of the lower oil nozzle forms an angle of 70 degrees with the upper inner surface of the lower oil nozzle.

5. The flow testing apparatus for an asymmetric dual-channel small-aperture nozzle as described in claim 1, characterized in that: The angle between the inner surface of the lower end of the upper oil nozzle and the horizontal plane of the nozzle of the front casing inlet rectifier is 20 degrees.

6. The flow testing apparatus for an asymmetric dual-channel small-aperture nozzle as claimed in claim 1, characterized in that: Both the front and rear baffles have waist-shaped grooves at the upper middle part.

7. The flow testing apparatus for an asymmetric dual-channel small-aperture nozzle as claimed in claim 1, characterized in that: It also includes M3 cylindrical head screws. The rear baffle and the front baffle have corresponding threaded holes at both ends. The M3 cylindrical head screws pass through the front baffle, the lower oil nozzle and the rear baffle in sequence and are then connected as a whole.

8. The flow testing apparatus for an asymmetric dual-channel small-aperture nozzle as claimed in claim 1, characterized in that: It also includes an M5 cylindrical head screw, which passes through the through hole provided at the lug end of the upper oil nozzle and then enters the threaded hole at the lug end of the lower oil nozzle, thus fastening the upper oil nozzle and the lower oil nozzle together.

9. The flow testing apparatus for an asymmetric dual-channel small-aperture nozzle as claimed in claim 1, characterized in that: The upper oil nozzle, lower oil nozzle, rear baffle, and front baffle are all made of 20Cr13 material.

10. The flow testing apparatus for an asymmetric dual-channel small-aperture nozzle as claimed in claim 1, characterized in that: The required hardness of the upper oil nozzle, lower oil nozzle, rear baffle, and front baffle is HRC33-38.

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