Special clamp for dynamic balance of dynamic pressure turbine cooler

Abstract

The utility model belongs to the technical field of tool parts, and particularly discloses a special clamp for dynamic balance of a dynamic pressure turbine cooler, which structurally comprises a base, and a left vertical plate, a right vertical plate, a left support and a right support are respectively fixed on the base. Supporting rods are fixed to the left vertical plate and the right vertical plate respectively, and one end of each supporting rod is connected with an adapter. Adjusting plates are respectively fixed on the left support and the right support, a pair of bearing supporting rods are respectively fixed on the adjusting plates, and a pair of ball bearings are respectively pressed into the bearing supporting rods in an interference mode. The upper supports are fixed to the left support and the right support respectively, the upper adjusting plates and the bearing supporting rods are fixed to the upper supports, and the ball bearings are pressed into the bearing supporting rods in an interference mode. The clamp special for dynamic balance can provide all-directional fixation for the dynamic pressure turbine cooler, the stability in the dynamic balance process is improved, the risk that a product shakes and collides with the clamp is reduced, and meanwhile the dynamic balance precision of the dynamic pressure turbine cooler is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of tooling components, specifically relating to a special fixture for dynamic balancing of a dynamic pressure turbine cooler. Background Technology

[0002] The dynamic pressure turbine cooler is a core cooling component in the aircraft's environmental control system. It expands and cools the engine bleed air to provide cooling air for the aircraft cabin and avionics bay. Simultaneously, the turbine's output power drives a coaxial compressor, increasing the system's cooling capacity and meeting ground cooling requirements, ultimately ensuring comfortable living conditions for the pilots and stable operation of the avionics bay. The dynamic pressure turbine cooler is a high-speed rotating machine, mainly consisting of a turbine volute, turbine impeller, compressor volute, compressor impeller, shaft, bearings, and bearing housings. The dynamic balance accuracy of the dynamic pressure turbine cooler directly affects its rotational stability. Imbalance can cause rotor jamming, turbine cooler failure, and in severe cases, damaged fan blades may damage the engine, leading to a flight accident. Currently, the commonly used dynamic balancing devices are general-purpose fixtures, which have low precision, large errors, and poor stability. They cannot meet the precision requirement of the dynamic pressure turbine cooler that the residual dynamic imbalance is no more than 0.01 g·cm. There is an urgent need to design a special dynamic balancing fixture for dynamic pressure turbine coolers to stably fix the dynamic pressure turbine cooler, thereby ensuring the dynamic balance precision requirements of the dynamic pressure turbine cooler. Utility Model Content

[0003] The purpose of this invention is to address the problems of low precision, large error, and poor stability of conventional general-purpose fixtures, which cannot meet the requirements of dynamic balancing accuracy. This invention provides a special dynamic balancing fixture for dynamic pressure turbine coolers, which is specially designed according to the structure of the dynamic pressure turbine cooler to ensure that the dynamic pressure turbine cooler is fixed in all directions (up, down, left, right, front, and back), thereby ensuring the dynamic balancing accuracy requirements of the dynamic pressure turbine cooler.

[0004] This utility model provides a special dynamic balancing fixture for a hydrodynamic turbine cooler, comprising a base with through holes and a T-slot running through the holes. A left vertical plate, a right vertical plate, a left support, and a right support are symmetrically mounted on the base. An upper support is fixed to each of the left and right supports. Support rods are fixed to the left and right vertical plates, with one end of each support rod connected to an adapter. Adjusting plates are fixed to the left and right supports, each with a pair of bearing support rods, and a pair of ball bearings are press-fitted into the bearing support rods. An upper adjusting plate is fixed to the upper support, and bearing support rods are fixed to the upper adjusting plate, with ball bearings press-fitted into the bearing support rods.

[0005] Furthermore, both the left and right upright plates are L-shaped structures and are fixed to the left and right ends of the base by fixing screws. The left and right upright plates are respectively provided with internal threaded through holes.

[0006] Furthermore, the support rod is a cylindrical rod with a threaded end on the left and a smooth end on the right.

[0007] Furthermore, the adapter is a cuboid structure with through holes in the left and right and up and down directions, and a through groove; the adapter has threaded through holes machined in the front and back directions, in which a fastening handle is installed; the bearing bracket is a cylindrical structure, with one end fixed in the through hole in the up and down direction of the adapter, and the other end having a ball bearing interference fit.

[0008] Furthermore, both the left and right supports are U-shaped structures and are fixed to the base with fixing screws; the left and right sides of the left and right supports are respectively provided with waist-shaped slots, and the adjustment plate is fixed in the waist-shaped slots with adjusting screws.

[0009] Furthermore, the upper support has an "n" shaped structure and is fixed to the left and right supports by cylindrical pins, rotating up and down with the cylindrical pins as the fulcrum; the upper adjusting plate is a rectangular plate with a waist-shaped slot in the middle part, in which an adjusting screw is installed.

[0010] The beneficial effects of this invention are as follows: The dynamic pressure turbine cooler is fixed in a horizontal position by two pairs of ball bearings on the base plate. Adjusting the upper adjusting plate presses the dynamic pressure turbine cooler to limit its upward movement. Adjusting the position and angle of one ball bearing on each side ensures that the outer ring of the bearing contacts the shaft end of the dynamic pressure turbine cooler, guaranteeing no lateral movement. These features ensure omnidirectional fixation of the dynamic pressure turbine cooler, preventing vibration during high-speed rotation and improving the accuracy of dynamic balance. Simultaneously, these features ensure the stability of the dynamic pressure turbine cooler, preventing abnormal movement during high-speed rotation from damaging the testing equipment. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of the dynamic balancing fixture for the hydrodynamic turbine cooler of this utility model;

[0012] Figure 2 This is a top view of the dynamic balancing fixture for the hydrodynamic turbine cooler of this utility model;

[0013] Figure 3 This is a left view of the dynamic balancing fixture for the hydrodynamic turbine cooler of this utility model.

[0014] The markings in the diagram are: 1-base, 2-fixing screw, 3-left upright plate, 4-nut, 5-support rod, 6-ball bearing, 7-upper bracket, 8-adjusting screw, 9-upper adjusting plate, 10-cylindrical pin, 11-right bracket, 14-left bracket, 15-bearing support rod, 16-right adapter, 17-fastening handle, 18-right upright plate, 19-left adjusting plate, 21-right adjusting plate, 22-left adapter, 23-bearing bracket. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Example

[0016] This utility model discloses a special clamp for dynamic balancing of a hydrodynamic turbine cooler, such as... Figure 1 , Figure 2 As shown, the system includes a base 1 with through holes and a T-shaped groove running through the holes. A left upright plate 3, a right upright plate 18, a left support 14, and a right support 11 are symmetrically mounted on the base. An upper support 7 is fixed to each of the left and right supports. Support rods 5 are fixed to the left and right upright plates, with one end of each support rod connected to an adapter. Adjusting plates are fixed to the left and right supports, each with a pair of bearing support rods 15 and a pair of ball bearings 6 press-fitted into the bearing support rods. An upper adjusting plate 9 is fixed to the upper support, with bearing support rods also fixed to it, and ball bearings press-fitted into the bearing support rods.

[0017] In the above embodiment, the base 1 is machined with 16 symmetrical φ8.5mm through holes spaced 35mm apart, which facilitates the connection and fixation of the dynamic balancing machine. There is a T-shaped groove running through the through holes. The left upright plate 3, right upright plate 18, left bracket 14, and right bracket 11 are respectively fixed to the base by fixing screws 2.

[0018] like Figure 1 As shown, the left upright plate 3 and the right upright plate 18 are both L-shaped structures with φ8.5mm through holes machined at the bottom. They are fixed to the left and right ends of the base by fixing screws 2. The upper part is machined with two M8 internal thread through holes respectively.

[0019] The support rod 5 is a φ8mm cylindrical rod with a length of 100mm (one on each side). The left end of the support rod is a 20mm long M8 threaded end, and the right end is a smooth rod. The threaded ends of the support rods are respectively fixed to a threaded hole on the left vertical plate 3 and the right vertical plate 18 by nuts (4). The smooth rod ends are respectively fitted with a left rotatable connector 22 and a right rotatable connector 16.

[0020] Both the left adapter 22 and the right adapter 16 are cuboid structures, with φ8mm through holes machined in the left-right and top-bottom directions, and a 2mm thick through groove machined through the center hole; the adapters have M4 threaded through holes machined at the front and back, in which fastening handles 17 are installed. Figure 2 As shown, the fastening handles 17 (one on each side) are T-shaped, with an M4 threaded rod at the front and a φ4mm cylindrical handle at the rear. The bearing brackets 23 (one on each side) are cylindrical, with one end fixed to the φ8mm through holes in the left and right rotatable joints 22 and 16 respectively, and the other end respectively interference-fitted with ball bearings 6. During assembly, the left rotatable joint 22 is inserted into the support rod 5 to a suitable distance, while simultaneously adjusting the bearing brackets 23 to a suitable distance, and then the fastening handles 17 are rotated to secure the entire assembly.

[0021] like Figure 1 As shown, the left bracket 14 and the right bracket 11 are both U-shaped structures, with φ8mm through holes machined at the bottom, and are fixed to the base by fixing screws 2; the left and right sides of the left and right brackets are respectively machined with waist-shaped slots, in which adjusting screws 8 are installed for adjusting the left adjusting plate 19 and the right adjusting plate 21 in the vertical direction; the top of the left and right brackets are respectively machined with φ8mm cylindrical pin holes, on which the upper bracket 7 is fixed.

[0022] The left adjusting plate 19 and the right adjusting plate 21 are both "convex" plate structures. They are respectively machined with φ8mm through holes on the left and right sides and fixed to the left bracket 14 and the right bracket 11 with adjusting screws 8. The upper end is respectively machined with φ7.5mm through holes for installing bearing support rods 15. The ball bearings 6 are respectively interference-fitted to the bearing support rods 15.

[0023] The upper bracket 7 has an "n"-shaped structure, with an M8 threaded hole at the upper end for fixing the upper adjusting plate 9, and symmetrical φ8mm cylindrical pin holes at the lower end. The upper adjusting plate 9 is a rectangular plate with a waist-shaped slot in the middle section, allowing its position to be adjusted up and down using adjusting screws 8. The lower part of the upper adjusting plate has a φ8mm through hole for installing the bearing support rod 15, and the ball bearing 6 is interference-fitted onto the bearing support rod 15. The upper bracket 7 is fixed to the left bracket 14 and the right bracket 11 respectively by cylindrical pins 10, and the upper bracket 7 can rotate up and down using the cylindrical pins 10 as fulcrums.

[0024] When performing dynamic balancing on the dynamic pressure turbine cooler, first open the upper bracket 7 (one on each side), then place the dynamic pressure turbine cooler on the ball bearing 6 and adjust its position so that the left and right ends of the dynamic pressure turbine cooler extend out of the left adjusting plate 19 and the right adjusting plate 21 at approximately the same position. Rotate the dynamic pressure turbine cooler so that it can rotate evenly on the bearing. Loosen the fastening handle 17 and adjust the position of the left rotating joint 22 so that the ball bearing 6 is in contact with the left end face of the dynamic pressure turbine cooler; similarly, adjust the position of the right rotating joint 16 so that the ball bearing 6 is in contact with the right end face of the dynamic pressure turbine cooler. Rotate the upper bracket 7 downward and lock it with the cylindrical pin. Adjust the position of the upper adjusting plate 9 using the adjusting screw 8 so that the lower end of the ball bearing 6 is in contact with the upper end face of the dynamic pressure turbine cooler. Finally, tighten the adjusting screw 8. Rotate the dynamic pressure turbine cooler by hand to ensure that there is no significant movement in the up-down, left-right, and front-back positions, and that it can rotate freely without jamming. Then perform dynamic balancing.

Claims

1. A special dynamic balancing fixture for a hydrodynamic turbine cooler, characterized in that: Includes a base (1), on which through holes are machined, and a T-shaped groove running through the through holes is provided. A left upright plate (3), a right upright plate (18), a left bracket (14) and a right bracket (11) are symmetrically installed on the base. An upper bracket (7) is fixed on the left bracket and the right bracket respectively. Support rods (5) are fixed on the left and right upright plates respectively, and one end of the support rod is connected to an adapter. The left and right supports are respectively fixed with adjustment plates, and a pair of bearing support rods (15) are respectively fixed on the adjustment plates. A pair of ball bearings are respectively pressed into the bearing support rods with interference fit. An upper adjustment plate (9) is fixed on the upper bracket, and a bearing support rod (15) is fixed on the upper adjustment plate. A ball bearing is press-fitted into the bearing support rod.

2. The dynamic balancing fixture for a hydrodynamic turbine cooler according to claim 1, characterized in that: The left upright plate (3) and the right upright plate (18) are both L-shaped structures and are fixed to the left and right ends of the base by fixing screws (2). The left upright plate and the right upright plate are respectively provided with internal thread through holes.

3. The dynamic balancing fixture for a hydrodynamic turbine cooler according to claim 1, characterized in that: The support rod (5) is a cylindrical rod with a threaded end on the left and a smooth end on the right.

4. The dynamic balancing fixture for a hydrodynamic turbine cooler according to claim 1, characterized in that: The adapter is a cuboid structure with through holes in the left and right and up and down directions, and a through groove; the adapter has threaded through holes in the front and back directions, in which a fastening handle (17) is installed; the bearing bracket (23) is a cylindrical structure, with one end fixed in the through hole in the up and down direction of the adapter, and the other end is interference-fitted with a ball bearing (6).

5. The dynamic balancing fixture for a hydrodynamic turbine cooler according to claim 1, characterized in that: The left bracket (14) and the right bracket (11) are both U-shaped structures and are fixed to the base by fixing screws; the left and right sides of the left and right brackets are respectively provided with waist-shaped slots, and the adjustment plate is fixed in the waist-shaped slots by adjusting screws (8).

6. The dynamic balancing fixture for a hydrodynamic turbine cooler according to claim 1, characterized in that: The upper support (7) is an "n" shaped structure, which is fixed to the left and right supports by a cylindrical pin (10) and rotates up and down with the cylindrical pin as the fulcrum; the upper adjustment plate (9) is a rectangular plate with a waist-shaped slot in the middle part, in which an adjustment screw is installed.

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