Adjusting spring assembling device

Abstract

The utility model discloses an adjusting spring assembling device, which belongs to the technical field of aviation repair and comprises a screw rod, a gland, a pressure head, a pull rod, a base and a one-way thrust ball bearing, the pull rod is fixed on the base, the gland is provided with a pull rod hole for the pull rod to penetrate out and is used for guiding the movement of the gland, and the center of the gland is provided with a threaded hole which is in threaded fit with the screw rod. The lower end of the screw is provided with an axial blind hole used for inserting the one-way thrust ball bearing and the upper end of the pressure head, and the lower end of the pressure head is provided with four small cylinders used for positioning the adjusting screw cap. The auxiliary oil tank pressure regulating valve shell is placed on the base, the regulating screw cap is sleeved on the small cylinder of the pressure head and placed on the regulating spring, the upper end of the pressure head is sleeved with the one-way thrust ball bearing and then inserted into the axial blind hole of the screw rod, and after the screw rod is twisted to compress the regulating spring, the pressure head is twisted reversely to install the regulating screw cap. The auxiliary fuel tank pressure regulating valve has the advantages of being stable in performance, reliable in use, convenient to disassemble and assemble and the like, and cannot be damaged in the using process.

Description

Technical Field

[0001] This utility model belongs to the field of aviation repair technology and relates to an adjusting spring assembly device, particularly to an assembly device for the pressure regulating valve of an auxiliary fuel tank of a certain type of aircraft. Background Technology

[0002] The QJY-36A auxiliary fuel tank pressure regulating valve of a certain type of aircraft consists of an adjusting spring, diaphragm assembly, housing, connecting pipe, valve, valve seat, valve spring, etc. It is a supporting accessory of the aircraft fuel system, installed on the pressurization line of the auxiliary fuel tank, and is used to regulate the pressure of the pressurized gas drawn from the engine to the specified value for fuel delivery to the auxiliary fuel tank.

[0003] When repairing the QJY-36A auxiliary oil tank pressure regulating valve, there are repairable parts and replacement parts. It requires complete disassembly, inspection, repair, and replacement of each part before reassembly. This includes installing the adjusting spring QJY36A-0007 and adjusting its length. Then, product performance and airtightness tests are conducted to meet operational requirements. Based on measured dimensions, the adjusting spring is 150mm long, 30mm outer diameter, 4mm wire diameter, and compressed to approximately 40mm. The adjusting spring is installed inside the cylinder. Then, the adjusting screw cap KJY-15-0002 is installed (e.g., ...). Figure 9 Tighten the adjusting spring. The installation of the adjusting spring is not easy. If it is not installed properly, it can easily cause instability in the overall performance of the auxiliary oil tank pressure regulating valve and cause damage. Utility Model Content

[0004] This utility model provides an adjusting spring assembly device.

[0005] The present invention adopts the following technical solution:

[0006] An adjusting spring assembly device includes a rotating rod 1, a screw 2, a pressure cap 3, a pressure head 4, a pull rod 5, a base 6, and a one-way thrust ball bearing 8.

[0007] The base 6 is circular, with a step and countersunk hole machined in its center, and four threaded holes evenly distributed around its circumference. The auxiliary oil tank pressure regulating valve housing is placed on the step in the center of the base 6. A protective pad 7 is installed in the countersunk hole to prevent damage to the housing, and the protective pad 7 has a countersunk hole machined in its center. The pull rod 5 is a smooth rod in the middle, with small-diameter steps and threads machined at both ends. There are four pull rods 5 with the same structure, and their lower ends are respectively installed in the threaded holes around the circumference of the base 6. The pressure cap 3 is circular, with a threaded hole machined in its center, and four pull rod holes evenly distributed around its circumference. The upper ends of the four pull rods 5 pass through the four pull rod holes and are then sequentially installed with flat washers, spring washers, and hexagonal nuts to press the pressure cap 3 tightly onto the step at the upper end of the pull rod 5. The screw 2 is machined in the middle. The screw 2 has a threaded connection, a radial hole machined at the upper end, and a large-diameter step and an axial hole machined at the lower end. The screw 2 mates with the threaded hole in the center of the pressure cap 3, and the screw 2 can be adjusted up and down through the thread. The rotating rod 1 is a long smooth rod that is inserted into the radial hole at the upper end of the screw 2 to operate the screw 2 to rotate. The pressure head 4 has a hexagonal and radial hole machined on its outer circumference. The radial hole is used to insert the rotating rod 1 to drive the pressure head 4 to rotate. There are 4 small cylinders evenly distributed around the circumference of the lower surface of the pressure head 4, which are used to position the adjusting screw cap of the auxiliary oil tank pressure regulating valve so that it rotates synchronously. A small-diameter column is set at the center of the upper surface. The outer diameter of the column is set according to the axial hole at the lower end of the screw 2. In use, the one-way thrust ball bearing 8 is placed into the axial hole at the lower end of the screw 2, and then inserted into the main body at the upper end of the pressure head 4.

[0008] Furthermore, the protective pad 7 is made of polytetrafluoroethylene.

[0009] The beneficial effects of this utility model are as follows: This utility model is used to realize the assembly of the adjusting spring of the auxiliary oil tank pressure regulating valve. It has the characteristics of stable performance, reliable use, and convenient disassembly and assembly. Moreover, it will not damage the auxiliary oil tank pressure regulating valve during use, thus filling the gap of this type of device. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the rotating rod.

[0012] Figure 3 This is a schematic diagram of a screw.

[0013] Figure 4 This is a schematic diagram of the cap, where (a) is the front view and (b) is the side view.

[0014] Figure 5 This is a schematic diagram of the pressure head, where (a) is the front view and (b) is the side view.

[0015] Figure 6 This is a schematic diagram of the pull rod.

[0016] Figure 7 The diagram shows the base, where (a) is a sectional view and (b) is a side view.

[0017] Figure 8 This is a schematic diagram of the protective pad, where (a) is a sectional view and (b) is a side view.

[0018] Figure 9 This is a schematic diagram of the adjusting screw cover of the pressure regulating valve of the QJY-36A auxiliary oil tank, where (a) is the front view and (b) is the side view.

[0019] In the diagram: 1-Lever; 2-Screw; 3-Granty cap; 4-Pressure head; 5-Pull rod; 6-Base; 7-Protective pad; 8-One-way thrust ball bearing. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below.

[0021] This utility model takes the adjusting spring QJY36A-0007 installed in the pressure regulating valve of the QJY-36A auxiliary oil tank as an example, and provides an adjusting spring assembly device. The assembly device includes a rotating rod 1, a screw 2, a pressure cap 3, a pressure head 4, a pull rod 5, a base 6, and a one-way thrust ball bearing 8. Figure 1 .

[0022] like Figure 7 The base 6 is circular, with a step and countersunk hole machined in its center, and four threaded holes evenly distributed around its circumference. The auxiliary oil tank pressure regulating valve housing is placed on the step in the center of the base 6. A protective pad 7 is installed in the countersunk hole to prevent damage to the housing. The protective pad 7 is made of polytetrafluoroethylene and has a countersunk hole machined in its center. Figure 8 ;like Figure 6 The pull rod 5 has a smooth middle section and small-diameter steps and threads at both ends. There are four pull rods 5 with identical structures, and their lower ends are respectively installed in threaded holes around the circumference of the base 6; Figure 4 The pressure cap 3 is circular, with a threaded hole at its center and four tie rod holes evenly distributed around its circumference. The upper ends of the four tie rods 5 pass through these four tie rod holes, and then a flat washer, a spring washer, and a hexagonal nut are installed sequentially to press the pressure cap 3 firmly onto the step at the upper end of the tie rods 5. Figure 3 The screw 2 has a threaded section in the middle, a radial hole at the upper end, and a large-diameter step and an axial hole at the lower end. The screw 2 mates with the threaded hole in the center of the gland 3, allowing for vertical adjustment of the screw 2 via the thread. Figure 2 The rotating rod 1 is a long, smooth rod that is inserted into the radial hole at the upper end of the screw 2 to operate the screw 2 to rotate; for example... Figure 5The outer diameter of the pressure head 4 is machined with hexagonal and radial holes. The radial holes are used to insert the rotating rod 1 to drive the pressure head 4 to rotate. Four small cylinders are evenly distributed along the circumference on the lower surface of the pressure head 4 to position the adjusting screw cap of the auxiliary oil tank pressure regulating valve so that it rotates synchronously. A small-diameter cylinder is set at the center of the upper surface. The outer diameter of the cylinder is set according to the axial hole at the lower end of the screw 2. In use, the one-way thrust ball bearing 8 is placed in the axial hole at the lower end of the screw 2, and then inserted into the main body at the upper end of the pressure head 4.

[0023] Working process: During operation, place the adjusting spring into the housing of the QJY-36A auxiliary oil tank pressure regulating valve, then place the housing on the protective pad 7 installed at the center of the base 6. Rotate the rotating rod 1 to adjust the height of the screw 2. When appropriate, put the QJY-36A auxiliary oil tank pressure regulating valve adjusting screw cover KJY-15-0002 onto the four small cylinders at the bottom of the pressure head 4. Put the one-way thrust ball bearing 8 on top of the pressure head 4. Place the pressure head 4 on the adjusting spring. Adjust the screw 2 so that the one-way thrust ball bearing 8 and the column at the upper end of the pressure head 4 enter the axial hole at the lower end of the screw 2. Operate the rotating rod 1 to adjust the height of the screw 2 and compress the adjusting spring to the appropriate position. Then remove the rotating rod 1 from the adjusting screw 2 and insert it into the radial hole of the pressure head 4. Rotate the pressure head 4 in the opposite direction and install the adjusting screw cover to meet the relevant requirements.

Claims

1. An adjusting spring assembly device, characterized in that, The assembly device includes a screw (2), a pressure cap (3), a pressure head (4), a pull rod (5), a base (6), and a one-way thrust ball bearing (8); The base (6) is circular with four threaded holes evenly distributed around its circumference. The auxiliary oil tank pressure regulating valve housing is placed on a step in the center of the base (6). Four identical pull rods (5) are provided, with their ends fixed in the threaded holes around the base (6) and the pull rod holes in the pressure cap (3). The pressure cap (3) is circular with a threaded hole at its center and four pull rod holes evenly distributed around its circumference. The screw (2) has threads in its middle and a large-diameter step at its lower end. The screw (2) and the threaded hole in the center of the pressure cap (3) are engaged, and the screw (2) can be adjusted up and down by means of the thread. The pressure head (4) has four small cylinders evenly distributed around its lower surface to position the adjusting screw cap of the auxiliary oil tank pressure regulating valve. A small-diameter cylinder is set at the center of the upper surface. The outer diameter of the cylinder is set according to the axial hole at the lower end of the screw (2). When in use, the one-way thrust ball bearing (8) is placed in the axial hole at the lower end of the screw (2) and then inserted into the main body at the upper end of the pressure head (4).

2. The adjusting spring assembly device according to claim 1, characterized in that, The base (6) has a step and a countersunk hole in the center, and a protective pad (7) is installed in the countersunk hole to prevent damage to the shell.

3. The adjusting spring assembly device according to claim 2, characterized in that, The protective pad (7) has a countersunk hole machined in the center.

4. An adjusting spring assembly device according to claim 2 or 3, characterized in that, The protective pad (7) is made of polytetrafluoroethylene.

5. The adjusting spring assembly device according to claim 1, characterized in that, The upper end of the screw (2) is machined with a radial hole for inserting the rotating rod (1). The rotating rod (1) is a long smooth rod used to operate the screw (2) to rotate.

6. The adjusting spring assembly device according to claim 1, characterized in that, The outer diameter of the pressure head (4) is machined with a radial hole for inserting a rotating rod (1) to drive the pressure head (4) to rotate.

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