Pressure regulating valve structure

Abstract

The application provides a pressure regulating valve structure, which comprises a pressure regulating valve shell; a dial plate is arranged on the top of the pressure regulating valve shell, the dial plate is connected with the pressure regulating valve shell through a speed increasing mechanism, and a pointer is arranged between the dial plate and the speed increasing mechanism; the lower end of the speed increasing mechanism is connected with a spring seat, and the upper end is connected with an outer sleeve nut; the spring seat is movably connected with the pressure regulating valve shell, and a valve is connected with the spring seat through a spring at the bottom of the spring seat; the speed increasing mechanism comprises a driving rod and a driven rod, the lower end of the driving rod is connected with a plurality of gear wheels, and the upper end of the driven rod is a gear end which is meshed with the plurality of gear wheels. The speed increasing mechanism of the application transmits the rotation of the driving rod to the driven rod after speed increasing, and then drives the spring seat to move and compress the spring, so that the driving rod only needs to rotate less than one circle to meet the pressure regulation in the range of the pressure regulating valve; the dial plate and the pointer cooperate with the speed increasing mechanism to realize the visualization of the pressure setting of the pressure regulating valve.

Description

A pressure regulating valve structure Technical Field

[0001] This invention relates to a pressure regulating valve structure, belonging to the field of aero-engine lubrication. Background Technology

[0002] Constant pressure regulating valves, as pressure regulating mechanisms, are widely used in aero-engine lubrication systems to ensure that the lubricating oil pressure in the engine lubrication system is within a specified range, so as to meet the lubrication and heat dissipation needs of the lubricating oil at various lubrication points of the engine. The regulating valve is generally installed on the housing of the booster pump, with the valve end connected to the booster pump's pressurized lubricating oil and the overflow window connected to the booster pump's inlet lubricating oil. When the lubricating oil pressure exceeds the regulating valve's set pressure, the lubricating oil acts on the valve, compressing the spring upwards. Part of the lubricating oil flows back to the booster pump through the upper overflow window of the regulating valve, thus stabilizing the lubricating oil pressure within the set range.

[0003] Currently, most pressure regulating valves used in aero engines consist of a single rotating rod without a clearly marked direction of rotation. Adjusting the valve requires considering the rotation direction, and the number of rotations required varies depending on the pressure being adjusted. The number of rotations must be calculated based on factors such as thread pitch and spring force to obtain the final pressure. Therefore, this type of pressure regulating valve suffers from problems such as complex pressure adjustment operations, susceptibility to errors during adjustment, inaccurate pressure settings, and inconvenience in maintenance and repair. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a pressure regulating valve structure.

[0005] The present invention is achieved through the following technical solutions.

[0006] This invention provides a pressure regulating valve structure, including a pressure regulating valve housing; a dial is provided on the top of the pressure regulating valve housing, the dial is connected to the pressure regulating valve housing through a speed-increasing mechanism, and a pointer is provided between the dial and the speed-increasing mechanism; the lower end of the speed-increasing mechanism is connected to a spring seat, and the upper end is connected to an outer nut; the spring seat is movably connected to the pressure regulating valve housing, and a valve is connected to the bottom of the spring seat through a spring; the speed-increasing mechanism includes a driving rod and a driven rod, the lower end of the driving rod is connected to multiple gears, and the upper end of the driven rod is a gear end, which meshes with multiple gears.

[0007] The upper end of the pressure regulating valve housing is a rhomboid column structure, and the lower end is a hollow cylindrical structure. The inner cavity of the hollow cylindrical structure is provided with a guide groove, and the spring seat is installed in the guide groove. The inner cavity above the guide groove is provided with an internal gear ring, and the inner cavity below the guide groove is provided with multiple overflow windows. The gear meshes with the internal gear ring.

[0008] The top of the active rod is provided with an external thread and a square shaft, and an outer nut is installed on the top of the active rod; the top of the active rod passes through the dial and the pointer and is connected to the outer nut;

[0009] One end of the outer nut is a hexagonal square head, and the other end is a cylindrical structure; the cylindrical structure has an internal threaded hole in the middle, and the hexagonal square head has multiple locking holes.

[0010] The upper end face of the pressure regulating valve housing is provided with multiple mounting holes on both sides for mounting to the lubricating oil accessory housing, and a through hole in the middle, through which the driving rod is connected to the pressure regulating valve housing;

[0011] The pointer is teardrop-shaped, with a special-shaped hole on the cylindrical end face of the teardrop shape. The active rod is connected to the outer nut through the special-shaped hole.

[0012] The lower end of the driving rod is provided with a first sealing ring groove, a first cylindrical boss and a triangular bracket in sequence. The triangular bracket has a connecting hole in the middle for connecting the driven rod. Multiple gear grooves are provided along the circumference of the connecting hole, and gears are installed in the gear grooves. The gear end of the driven rod is connected to the driving rod through the connecting hole. A baffle is provided between the driven rod and the triangular bracket.

[0013] A sealing ring A is fitted onto the first sealing ring groove, and a through hole is provided in the gear groove; the lower end of the through hole is a round hole, and the upper end is a stepped hole.

[0014] The baffle is provided with a second cylindrical boss, and a plurality of bolt connection holes are provided along the circumference of the second cylindrical boss; the second cylindrical boss matches the connection holes, and the gear end of the driven rod passes through the second cylindrical boss and the connection holes to mesh with the gear.

[0015] The baffle, triangular bracket, and gear are connected by bolts, and the tail of the bolt passes through the stepped hole at the top of the triangular bracket and is connected to a lock nut.

[0016] The valve is a cylindrical structure with a cylindrical guide rod on the upper end and a sealing ring groove on the lower end. A countersunk hole is provided on the cylindrical guide rod, and a sealing ring B is provided in the sealing ring groove.

[0017] The lower end of the driven rod is a cylindrical structure with external threads on the outer wall of the cylindrical structure; the spring seat has a central hole with internal threads on the inner wall of the central hole, and a lug on the outer wall of the spring seat. The lug is movably connected to the guide groove, and the external threads of the driven rod are connected to the internal threads of the spring seat.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. Speed-increasing mechanism: The speed-increasing rotation of the driving rod is transmitted to the driven rod, which in turn drives the spring seat to move and compress the spring, so that the driving rod only needs to rotate less than one revolution to meet the pressure regulation within the range of the pressure regulating valve;

[0020] 2. Dial and pointer: In conjunction with the speed-increasing mechanism, it enables visualization of the pressure setting of the pressure regulating valve;

[0021] 3. Gears: The force of rotating the drive lever is shared by multiple gears, making the pressure regulating valve less prone to damage during pressure adjustment and safer and more reliable in use and maintenance;

[0022] 4. Overall structure: The modular design facilitates the individual maintenance and replacement of the pressure regulating valve, and features a small structural volume, high load-bearing capacity, and reliable pressure regulation and sealing. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the structure of the present invention;

[0024] Figure 2 is a cross-sectional view of the present invention;

[0025] Figure 3 is a schematic diagram of the structure of the pressure regulating valve housing of the present invention;

[0026] Figure 4 is a top view of the pressure regulating valve housing of the present invention without the dial;

[0027] Figure 5 is a schematic diagram of the speed-increasing mechanism of the present invention;

[0028] Figure 6 is a rotated cross-sectional view of the speed-increasing mechanism structure of the present invention;

[0029] Figure 7 is a schematic diagram of the active rod of the present invention;

[0030] Figure 8 is a schematic diagram of the driven rod of the present invention;

[0031] Figure 9 is a schematic diagram of the structure of the baffle of the present invention;

[0032] Figure 10 is a schematic diagram of the outer nut of the present invention;

[0033] Figure 11 is a schematic diagram of the pointer of the present invention;

[0034] In the diagram: 1-Pressure regulating valve housing, 2-Outer nut, 3-Pointer, 4-Sealing ring A, 5-Increasing speed mechanism, 5.1-Drive rod, 5.2-Locking nut, 5.3-Gear, 5.4-Baffle, 5.5-Bolt, 5.6-Driven rod, 6-Spring seat, 7-Spring, 8-Valve, 9-Sealing ring B. Detailed Implementation

[0035] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0036] Example 1

[0037] As shown in Figures 1-11, a pressure regulating valve structure is described. The upper end of the pressure regulating valve housing 1 is a rhomboid column structure, and the lower end is a hollow cylindrical structure. Two mounting holes are designed on the upper end face of the pressure regulating valve housing 1 for connecting with the lubricating oil accessory housing. The lower end of the pressure regulating valve housing 1 is inserted into the mounting holes of the lubricating oil accessory housing, and is connected and fastened to the threaded holes on the lubricating oil accessory housing by bolts and locking plates. The pressure regulating valve is mated with the mounting surface of the lubricating oil accessory housing by surface contact and sealing ring to ensure the installation and sealing of the pressure regulating valve on the lubricating oil accessory housing.

[0038] Specifically, the top center of the pressure regulating valve housing 1 is designed as a dial structure with uniformly distributed circumferential scales. The dial range is greater than the maximum adjustable pressure that the pressure regulating valve can reach. Each small scale line represents the minimum adjustable pressure, indicating that the spring 7 is compressed by one pitch. A through hole is designed in the center of the dial for the active rod 5.1 on the speed-increasing structure 5 to pass through. The pointer 3 installed on the active rod 5.1 indicates the current adjustable pressure of the pressure regulating valve by the position indicated by the pointer on the dial.

[0039] Specifically, the hollow cylindrical structure at the lower end of the pressure regulating valve housing 1 has an internal gear ring structure near the mounting end face, and a guide groove is provided on the inner surface of the cylinder below, which is used to install the spring seat 6 and guide the spring seat 6 to move up and down. Three overflow windows are also provided on the cylinder at the lower end of the pressure regulating valve housing 1.

[0040] Specifically, the outer nut 2 has a hexagonal square head at one end for easy tightening, and a cylindrical structure at the other end with an internal threaded hole in the middle. Two symmetrical locking holes are located on the square head end. The outer nut 2 is installed at the top of the drive rod 5.1 of the speed-increasing mechanism 5. It is used to lock the drive rod 5.1 after the pressure of the pressure regulating valve is adjusted, and to press the pointer 3 to ensure that the pressure set by the pressure regulating valve does not change.

[0041] Specifically, the pointer 3 is designed in the shape of a teardrop, with one end being a sharp corner and the other end being a cylindrical surface. The cylindrical surface has a special-shaped hole in the middle. The pointer is installed on the active rod 5.1 of the speed-increasing mechanism 5 and cooperates with the dial on the pressure regulating valve housing 1 to indicate the specific set pressure of the pressure regulating valve.

[0042] Specifically, the speed-increasing mechanism 5 includes a driving rod 5.1, a driven rod 5.6, a gear 5.3, a baffle 5.4, a bolt 5.5, and a locking nut 5.2. The gear end of the driven rod 5.6 passes through the connecting hole of the triangular bracket and is installed inside the driving rod 5.1. The second cylindrical boss on the baffle 5.4 engages with the connecting hole of the triangular bracket, ensuring the installation of the driven rod 5.6 inside the driving rod 5.1. The gear end of the driven rod 5.6 meshes with the three gears 5.3 installed on the driving rod 5.1. The bolt 5.5 passes through the baffle 5.4, the triangular bracket, and the gears 5.3, and exits from the stepped hole at the upper end of the triangular structure of the driving rod 5.1, engaging with the locking nut 5.2 to complete the assembly of the speed-increasing mechanism 5.

[0043] Specifically, the top of the upper end of the drive rod 5.1 has a structure that combines external threads and a square shaft. The square shaft is used to install the pointer 3, which cooperates with the square hole on the pointer 3 so that the pointer 3 rotates synchronously with the rotation of the drive rod 5.1. On the other hand, it is convenient to use a wrench to rotate the drive rod 5.1 to realize the pressure adjustment of the pressure regulating valve.

[0044] Furthermore, the upper end of the drive rod 5.1 is designed with a first sealing ring groove in the middle for installing the sealing ring 4, which mates with the inner surface of the center hole at the top of the pressure regulating valve housing 1 to achieve sealing of the pressure regulating valve; the upper end of the drive rod 5.1 is provided with a first cylindrical boss at the lower position for positioning the speed-increasing mechanism 5 in the pressure regulating valve housing 1; the lower end of the drive rod 5.1 is provided with a triangular bracket, the middle of which is designed with a gear groove, and a through hole is opened in the center of the gear groove. The lower end of the through hole is a round hole, and the upper end is a stepped hole for installing the gear 5.3.

[0045] Understandably, the stepped hole is mainly for the convenience of installing the lock nut 5.2, saving installation space.

[0046] Furthermore, a circular hole is provided at the bottom of the driving rod 5.1, through which the gear end of the driven rod 5.6 is installed. At the same time, the end face of the baffle 5.4 and the second cylindrical boss cooperate with the driving rod 5.1 to realize the positioning of the driven rod 5.6 within the driving rod 5.1 and prevent the driven rod 5.6 from disengaging.

[0047] Specifically, the driven rod 5.6 is designed as a gear structure at one end and a cylindrical structure at the other end. The cylindrical end is provided with an external thread that mates with the internal thread of the center hole of the spring seat 6.

[0048] Furthermore, when the driven rod 5.6 rotates, the spring seat 6 moves up and down within the pressure regulating valve housing 1.

[0049] Specifically, the lug of the spring seat 6 engages with the guide groove on the cylindrical surface of the inner cavity of the pressure regulating valve housing 1, and the outer cylindrical surface of the spring seat 6 engages with the cylindrical surface of the inner cavity of the pressure regulating valve housing 1, ensuring that the spring seat 6 moves accurately up and down under the drive of the driven rod 5.6.

[0050] Preferably, the inner cavity of the spring seat 6 is used to install the spring 7, and it is fitted with the outer cylindrical surface of the spring 7 with a small clearance to ensure that the spring 7 is concentric and does not deviate within the spring seat 6; the other end of the spring 7 is installed on the guide rod of the valve 8, and the inner ring of the spring 7 is fitted with the guide rod with a small clearance to ensure that the spring 7 moves without deviation.

[0051] Specifically, the valve 8 has a cylindrical structure with a cylindrical guide rod. The guide rod has a countersunk hole of a certain depth in the middle to ensure the maximum compression stroke of the spring 7 and to prevent the driven rod 5.6 from interfering with the guide rod of the valve 8.

[0052] Furthermore, the valve 8 is installed at the bottom of the pressure regulating valve housing 1, and a second sealing ring groove is opened on its outer cylindrical surface. After the sealing ring 9 is installed, it cooperates with the cylindrical surface of the inner cavity of the pressure regulating valve housing 1, which ensures the up and down movement of the valve 8 on the pressure regulating valve housing 1, and at the same time ensures the seal between the valve 8 and the inner cavity of the pressure regulating valve housing 1 after the pressure is adjusted.

[0053] Example 2

[0054] During assembly, the speed-increasing mechanism 5 is assembled from the lower end of the pressure regulating valve housing 1 upwards, the top of the driving rod 5.1 passes through the central hole of the pressure regulating valve housing 1, and the first cylindrical boss on the driving rod 5.1 reaches the inner end face of the pressure regulating valve housing 1, thus the speed-increasing mechanism 5 is installed in place.

[0055] Secondly, the external thread at the top of the active rod 5.1 engages with the outer nut 2 to press the pointer 3 onto the dial of the pressure regulating valve housing 1, while simultaneously locking the active rod 5.1 so that it can no longer rotate, ensuring that the pressure of the pressure regulating valve remains unchanged after adjustment.

[0056] Secondly, the three gears 5.3 on the speed-increasing mechanism 5 mesh with the internal gear ring in the inner cavity of the pressure regulating valve housing 1. When the pressure of the pressure regulating valve is changed, the driving rod 5.1 is rotated, and the gears 5.3 revolve around the internal gear ring in the inner cavity of the pressure regulating valve housing 1 while rotating on their own axis, thereby driving the driven rod 5.6 gear to rotate. By designing the number of teeth on the internal gear ring, gears 5.3, and gears on the driven rod 5.6 in the pressure regulating valve housing 1, the different speeds of the driving rod 5.1 and the driven rod 5.6 are achieved, and the speed is increased.

[0057] Secondly, the active lever 5.1 rotates less than one revolution, and the driven lever 5.6 drives the spring seat 6 to move within the pressure regulating valve housing 1 to reach the maximum stroke, ensuring that the pressure regulating valve can adjust the pressure between the full flow rate and the maximum set pressure.

[0058] Example 23

[0059] The working principle is as follows: The pressure regulating valve structure is fixedly installed on the lubricating oil accessory housing. Inside, there is a designed speed-increasing mechanism 5 that cooperates with the internal gear ring on the pressure regulating valve housing 1. When adjusting the pressure, the active rod 5.1 is rotated, which drives the pointer 3 installed on the active rod 5.1 and the driven rod 5.6 to rotate at a speed-increasing rate through gear meshing. Combined with the screw transmission, the spring seat 6 moves up and down, thereby changing the compression of the spring 7, thus adjusting the pressure. Finally, the specific pressure value is obtained by the position indicated by the pointer 3 on the dial of the pressure regulating valve housing 1.

Claims

1. A pressure regulating valve structure, comprising a pressure regulating valve housing (1), characterized in that: The pressure regulating valve housing (1) has a dial on its top, which is connected to the pressure regulating valve housing (1) via a speed-increasing mechanism (5). A pointer (3) is provided between the dial and the speed-increasing mechanism (5). The lower end of the speed-increasing mechanism (5) is connected to a spring seat (6), and the upper end is connected to an outer nut (2). The spring seat (6) is movably connected to the pressure regulating valve housing (1), and a valve (8) is connected to the bottom of the spring seat (6) via a spring (7). The speed-increasing mechanism (5) includes a driving rod (5.1) and a driven rod (5.6). The lower end of the driving rod (5.1) is connected to multiple gears (5.3), and the upper end of the driven rod (5.6) is a tooth. The wheel end and gear end mesh with multiple gears (5.3); the upper end of the pressure regulating valve housing (1) is a rhomboid column structure, and the lower end is a hollow cylindrical structure; the inner cavity of the hollow cylindrical structure is provided with a guide groove, and the spring seat (6) is installed in the guide groove; the inner cavity above the guide groove is provided with an internal gear ring, and the inner cavity below the guide groove is provided with multiple overflow windows, and the gear (5.3) meshes with the internal gear ring; the top of the driving rod (5.1) is provided with an external thread and a square shaft, and the outer nut (2) is installed on the top of the driving rod (5.1); the top of the driving rod (5.1) passes through the dial, pointer (3) and connects to the outer nut (2); the outer nut... One end of the mother (2) is a hexagonal square head, and the other end is a cylindrical structure; the cylindrical structure has an internal threaded hole in the middle, and the hexagonal square head has multiple locking holes; the upper end face of the pressure regulating valve housing (1) has multiple mounting holes for mounting with the lubricating oil accessory housing on both sides, and a through hole in the middle, through which the driving rod (5.1) is connected to the pressure regulating valve housing (1); the pointer (3) is teardrop-shaped, and a special-shaped hole is provided on the cylindrical end face of the teardrop shape, through which the driving rod (5.1) is connected to the outer nut (2); the lower end of the driving rod (5.1) is provided with a first sealing ring groove, a first cylindrical boss and a triangular bracket in sequence, and the middle of the triangular bracket is provided with The connecting hole for connecting the driven rod (5.6) has multiple gear slots along the circumference of the connecting hole, and the gear (5.3) is installed in the gear slot; the gear end of the driven rod (5.6) is connected to the driving rod (5.1) through the connecting hole, and a baffle (5.4) is provided between the driven rod (5.6) and the triangular bracket; the lower end of the driven rod (5.6) is a cylindrical structure, and the outer wall of the cylindrical structure is provided with external threads; the spring seat (6) is provided with a central hole, the inner wall of the central hole is provided with internal threads, the outer wall of the spring seat (6) is provided with a lug, the lug is movably connected to the guide groove, and the external thread of the driven rod (5.6) is connected to the internal thread of the spring seat (6).

2. The pressure regulating valve structure as described in claim 1, characterized in that: A sealing ring A (4) is fitted onto the first sealing ring groove, and a through hole is provided in the gear groove; the lower end of the through hole is a round hole, and the upper end is a stepped hole.

3. The pressure regulating valve structure as described in claim 1, characterized in that: The baffle (5.4) is provided with a second cylindrical boss, and a plurality of bolt connection holes are provided along the circumference of the second cylindrical boss; the second cylindrical boss matches the connection holes, and the gear end of the driven rod (5.6) passes through the second cylindrical boss and the connection holes to mesh with the gear (5.3).

4. The pressure regulating valve structure as described in claim 3, characterized in that: The baffle (5.4), the triangular bracket, and the gear (5.3) are connected by bolts (5.5), and the tail of the bolt (5.5) passes through the stepped hole at the top of the triangular bracket and is connected to a lock nut (5.2).

5. The pressure regulating valve structure as described in claim 4, characterized in that: The valve (8) is a cylindrical structure. The upper end of the cylindrical structure is provided with a cylindrical guide rod, and the lower end is provided with a sealing ring groove. The cylindrical guide rod is provided with a countersunk hole, and the sealing ring groove is provided with a sealing ring B (9).

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