A centrifugal ventilator with high altitude valve

Abstract

The present invention discloses a centrifugal ventilator with a high altitude valve, comprising: a centrifugal ventilator shell; an oil-gas separation component installed in the centrifugal ventilator shell and separating the oil-gas mixture; a constant pressure component installed on the top of the centrifugal ventilator shell and capable of retaining the separated gas under a certain pressure state, and the constant pressure component is connected to the exhaust outlet of the oil-gas separation component. The oil-gas mixture inlet and the lubricating oil outlet are correspondingly connected to the lubricating oil cavity of the lubrication system through the oil return pipeline. When the oil-gas mixture enters the centrifugal ventilator shell from the oil-gas mixture inlet, the oil-gas separation component performs oil-gas separation, and the separated lubricating oil is discharged from the lubricating oil outlet, while the separated gas is retained by the constant pressure component and maintained under a certain pressure state, thereby solving the problem that the exhaust cavity part is directly connected to the outside and the cavity for oil-gas separation cannot retain the separated gas under a certain pressure state.

Description

Technical Field

[0001] The invention relates to a centrifugal ventilator with a high-altitude valve, belonging to the technical field of aviation engines. Background Art

[0002] The main shaft sealing system of aircraft engines is sealed by air at a certain pressure. During the operation of the engine, the sealed air will enter the bearing cavity of the lubrication system through the sealing device, and the air and lubricating oil in the bearing cavity will mix to form an oil-gas mixture. If the oil-gas mixture is directly discharged from the bearing cavity, it will cause a large amount of lubricating oil consumption. Therefore, a centrifugal ventilator needs to be installed on the oil return line of the engine to separate the oil and gas.

[0003] In a centrifugal ventilator for an aircraft engine with a Chinese patent publication number of CN108087121B, the disclosed technology is as follows: the gear transmission shaft is a hollow structure, and the center of the gear transmission shaft includes three coaxial holes: a central straight hole, a central tapered hole, and a transmission shaft hole. The central straight hole is connected to a chamber where the outlet of the gear transmission shaft is connected to the atmosphere; during the flow of oil and gas along the central tapered hole and the central straight hole, the dense lubricating oil is thrown to the outer wall of the central tapered hole, and enters the inclined hole one and the inclined hole two along the wall of the central tapered hole and returns to the chamber two. The oil and gas reaching the chamber one contains only a very small amount of lubricating oil. To the atmosphere; although the disclosed technology can achieve oil-gas separation, the exhaust chamber is directly connected to the outside world to discharge the separated oil and gas. In this case, there is a problem that the oil-gas separation chamber cannot retain the separated gas at a certain pressure state. Because the oil supply pump and the oil return pump arranged in the lubrication system are gear pumps, in order to ensure the reliability of the gear pump, the lubrication system oil chamber pressure needs to be set within a certain range. Once the exhaust chamber is directly connected to the outside world, the lubrication system oil chamber pressure cannot be maintained within a certain range. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a centrifugal ventilator with a high altitude valve.

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

[0006] The present invention provides a centrifugal ventilator with a high altitude valve, comprising:

[0007] A centrifugal ventilator housing, wherein the centrifugal ventilator housing is provided with an oil-air mixture inlet for the oil-air mixture to enter and an oil outlet for the separated oil to be discharged;

[0008] An oil-gas separation assembly installed in the centrifugal ventilator housing and separating the oil-gas mixture;

[0009] A constant pressure component is installed on the top of the centrifugal ventilator shell and can retain the separated gas at a certain pressure state. The constant pressure component is connected to the exhaust outlet of the oil and gas separation component.

[0010] The inner wall of the centrifugal ventilator housing is evenly provided with crescent-shaped flow path holes A for smooth collection of separated lubricating oil.

[0011] The oil-gas separation component comprises: a centrifugal ventilator rotor having one end rotatably mounted in the inner space of a centrifugal ventilator housing via a bearing, a structure for allowing oil-gas mixture to enter and for oil-gas separation to be provided at the top of the centrifugal ventilator rotor; an opening for the separated gas to be discharged at the top of the centrifugal ventilator rotor, the opening being connected to the constant pressure component, so that the constant pressure component is connected to the exhaust outlet of the oil-gas separation component;

[0012] A shaft that runs through the centrifugal fan rotor and rotates with it.

[0013] A centrifugal fan transmission gear is mounted on the shaft located outside.

[0014] The constant pressure assembly comprises: an air pressure regulating valve housing fixedly mounted on the top of the centrifugal ventilator housing, a main air passage connected to the opening at the top of the centrifugal ventilator rotor is provided on the middle part of the air pressure regulating valve housing, a secondary air passage connected to the main air passage is provided on the middle part of the air pressure regulating valve housing, and both ends of the secondary air passage are open; an air outlet for exhausting gas is provided on the air pressure regulating valve housing outside the middle part, and both ends of the secondary air passage are open and can be connected to the air outlet to exhaust the air after oil and gas separation;

[0015] A high altitude valve subassembly is provided which can controllably seal and block one end of the secondary air passage opening, and a damping subassembly is provided which can controllably seal and block the other end of the secondary air passage opening to generate damping force.

[0016] The high altitude valve subassembly comprises: a constant pressure housing fixedly connected to the air pressure regulating valve housing;

[0017] The valve diaphragm box is installed on the constant pressure housing with adjustable stroke via an adjusting screw;

[0018] The high-altitude valve is installed between the valve membrane box and the air pressure regulating valve shell through the high-altitude valve spring, and the high-altitude valve corresponds to the opening of one end of the secondary air channel of the air pressure regulating valve shell.

[0019] The damping subassembly includes: a damping valve sealed and blocked with the other end opening of the secondary gas channel;

[0020] A damping spring with one end pressing the damping valve against the other end of the secondary air channel to seal and block the opening, and the other end of the damping spring is installed in the air pressure regulating valve housing. The damping spring can press the damping valve to move in the air pressure regulating valve housing. The damping spring force of the damping spring is smaller than the damping spring force of the high altitude valve spring.

[0021] It also includes an intermediate shell, which is rotatably mounted on the other end of the centrifugal ventilator rotor via a bearing, and a constant pressure component is mounted on the intermediate shell.

[0022] The beneficial effects of the present invention are as follows: the oil-gas mixture inlet and the lubricating oil outlet are connected to the lubricating oil chamber of the lubrication system via the oil return pipeline; when the oil-gas mixture enters the centrifugal ventilator shell from the oil-gas mixture inlet, the oil-gas separation is carried out by the oil-gas separation component, and the separated lubricating oil is discharged from the lubricating oil outlet, while the separated gas is retained by the constant pressure component and maintained at a certain pressure state, thereby solving the problem that the exhaust cavity part is directly connected to the outside and the oil-gas separation cavity cannot retain the separated gas and maintain it at a certain pressure state. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] In the figure: 1-centrifugal ventilator housing; 2-centrifugal ventilator rotor; 3-shaft; 4-intermediate housing; 5-air pressure regulating valve housing; 51-primary air channel; 52-secondary air channel; 6-constant pressure housing; 7-high altitude valve; 71-high altitude valve spring; 81-damping spring; 8-damping valve; 9-centrifugal ventilator transmission gear; 10-valve diaphragm box; 11-adjusting screw. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0026] See also Figure 1 .

[0027] A centrifugal ventilator with a high altitude valve of the present invention comprises:

[0028] A centrifugal ventilator housing 1 is provided for providing a rotating force foundation, and an oil-gas mixture inlet for oil-gas mixture to enter and an oil outlet for lubricating oil to be discharged after separation are arranged on the centrifugal ventilator housing 1. The inner wall of the centrifugal ventilator housing 1 is evenly provided with crescent-shaped flow path holes A for smooth collection of separated lubricating oil;

[0029] An oil-gas separation component installed in the centrifugal ventilator housing 1 and separating the oil-gas mixture;

[0030] A constant pressure component is installed on the top of the centrifugal ventilator housing 1 and can retain the separated gas at a certain pressure state. The constant pressure component is connected to the exhaust outlet of the oil-gas separation component.

[0031] The oil-gas mixture inlet and the lubricating oil outlet are connected to the lubricating oil chamber of the lubricating system via the oil return pipeline. When the oil-gas mixture enters the centrifugal ventilator housing 1 from the oil-gas mixture inlet, the oil-gas separation is carried out by the oil-gas separation component, and the separated lubricating oil is discharged from the lubricating oil outlet, while the separated gas is retained by the constant pressure component and maintained at a certain pressure state, thereby solving the problem that the exhaust chamber part is directly connected to the outside world and the oil-gas separation chamber cannot retain the separated gas at a certain pressure state, and ensures that the lubricating oil chamber pressure of the lubricating system is set within a certain range. Once the exhaust chamber part is directly connected to the outside world, the gear pump can work reliably, and the oil supply pump and oil return pump set in the lubricating system can work normally.

[0032] The oil-gas separation component comprises: a centrifugal ventilator rotor 2, one end of which is rotatably mounted in the inner space of a centrifugal ventilator housing 1 via a bearing; a structure for allowing an oil-gas mixture to enter and for separating the oil and gas is provided at the top of the centrifugal ventilator rotor 2, and the structure can adopt the existing technology in the background technology, or can adopt an equally divided crescent-shaped flow path hole; an opening is provided at the top of the centrifugal ventilator rotor 2 for discharging the separated gas, and the opening is connected to the constant pressure component, so that the constant pressure component is connected to the exhaust outlet of the oil-gas separation component;

[0033] A shaft 3 is installed through the centrifugal fan rotor 2 and rotates together with the centrifugal fan rotor 2.

[0034] The centrifugal fan transmission gear 9 is installed on the shaft 3 located outside, so that the component inputting power can mesh with the centrifugal fan transmission gear 9 to drive the shaft 3 and the centrifugal fan rotor 2 to rotate together.

[0035] The constant pressure assembly comprises: an air pressure regulating valve housing 5 fixedly mounted on the top of the centrifugal ventilator housing 1, a main air passage 51 connected to the top opening of the centrifugal ventilator rotor 2 is provided on the middle part of the air pressure regulating valve housing 5, a secondary air passage 52 connected to the main air passage 51 is provided on the middle part of the air pressure regulating valve housing 5, and both ends of the secondary air passage 52 are open; an air outlet for exhausting gas is provided on the air pressure regulating valve housing 5 outside the middle part, and both ends of the secondary air passage 52 are open and can be connected to the air outlet to exhaust the air after oil and gas separation;

[0036] The high altitude valve subassembly opens one end of the secondary air passage 52 and can be controllably sealed and blocked, and the damping subassembly opens the other end of the secondary air passage 52 to generate a damping force and can be controllably sealed and blocked.

[0037] When at high altitude, the high altitude valve subassembly is controlled to directly seal and block the opening at one end of the secondary air channel 52, and the damping subassembly seals and blocks the opening at one end of the secondary air channel 52 by generating a damping force. When the centrifugal ventilator rotor 2 of the oil-gas separation assembly separates the oil and gas, the separated gas is collected and retained in the secondary air channel 52, so that the separated gas is maintained at a certain pressure state. When the pressure of the separated gas is greater than the sum of the air outlet and the damping force of the damping subassembly, the damping subassembly is separated from the opening at the other end of the secondary air channel 52 and opened, so that the separated gas is discharged from the air outlet, so that the main air channel 51, the secondary air channel 52 and the centrifugal ventilator housing 1 of the air pressure regulating valve housing 5 are maintained at a certain pressure state.

[0038] The high altitude valve subassembly comprises: a constant pressure housing 6 fixedly connected to the air pressure regulating valve housing 5;

[0039] A valve diaphragm box 10 is mounted on the constant pressure housing 6 with an adjustable stroke via an adjusting screw 11;

[0040] The high-altitude valve 7 is installed between the valve membrane box 10 and the air pressure regulating valve housing 5 via the high-altitude valve spring 71, and the high-altitude valve 7 corresponds to one open end of the secondary air channel 52 of the air pressure regulating valve housing 5.

[0041] When on the ground, the control adjusting screw 11 overcomes the spring force of the high-altitude valve spring 71 so that the valve diaphragm box 10 presses against the high-altitude valve 7 and is not sealed and blocked with one end of the secondary air channel 52. The high-altitude valve spring 71 ensures that there is always a gap between the high-altitude valve 7 and one end of the secondary air channel 52 for exhaust, and relies on atmospheric pressure to ensure that the pressure in the main air channel 51, the secondary air channel 52 and the centrifugal ventilator housing 1 of the air pressure regulating valve housing 5 is maintained; when at high altitude, the control adjusting screw 11 overcomes the spring force of the high-altitude valve spring 71 so that the valve diaphragm box 10 presses against the high-altitude valve 7 and one end of the secondary air channel 52 for sealing and blocking, and there is no longer a gap between the high-altitude valve 7 and one end of the secondary air channel 52 for exhaust. At this time, the damping subassembly seals and blocks the other end of the secondary air channel 52 by generating a damping force, and relies on the collection of separated gases to ensure that the pressure in the main air channel 51, the secondary air channel 52 and the centrifugal ventilator housing 1 of the air pressure regulating valve housing 5 is maintained.

[0042] The damping subassembly includes: a damping valve 8 sealed and blocked with the other end opening of the secondary air channel 52;

[0043] A damping spring 81 is provided at one end to seal and block the damping valve 8 against the open end of the secondary air channel 52, and the other end of the damping spring 81 is installed in the air pressure regulating valve housing 5. The damping spring 81 can press the damping valve 8 to move in the air pressure regulating valve housing 5. Specifically, it also includes a damping mounting seat that can be slidably mounted with the damping valve 8. The damping mounting seat is fixed in the air pressure regulating valve housing 5. The damping mounting seat is provided with a through hole for exhaust. The damping spring 81 is sleeved on the damping mounting seat. The damping spring force of the damping spring 81 is smaller than the damping spring force of the high-altitude valve spring 71.

[0044] At high altitude, the control adjusting screw 11 overcomes the spring force of the high altitude valve spring 71 to make the valve diaphragm box 10 press against the high altitude valve 7 and seal the opening of one end of the secondary air channel 52, and there is no gap between the high altitude valve 7 and the opening of one end of the secondary air channel 52 for exhaust. At this time, the damping spring 81 presses the damping valve 8 to seal the opening of the other end of the secondary air channel 52, and the separated gas is collected and retained in the secondary air channel 52, so that the separated gas is maintained at a certain pressure state, so that the main The air channel 51, the secondary air channel 52 and the centrifugal ventilator shell 1 are maintained at a certain pressure state; when the separated gas pressure increases to a level greater than the damping spring force of the damping spring 81 and less than the damping spring force of the high-altitude valve spring 71, the damping valve 8 is separated from the other end of the secondary air channel 52 and opened, so that the separated gas is discharged from the air outlet, and the main air channel 51, the secondary air channel 52 and the centrifugal ventilator shell 1 of the air pressure regulating valve shell 5 are maintained at a certain pressure state.

[0045] It also includes an intermediate shell 4, which is rotatably mounted on the other end of the centrifugal ventilator rotor 2 via a bearing. The constant pressure component is mounted on the intermediate shell 4. A through hole is provided in the middle of the intermediate shell 4 for the separated gas to be discharged from the exhaust opening of the centrifugal ventilator rotor 2 into the constant pressure component. Specifically, the through hole of the intermediate shell 4 is connected to the main air channel 51 of the air pressure regulating valve shell 5 of the constant pressure component.

[0046] The oil-gas mixture enters the centrifugal ventilator housing 1 from the oil-gas mixture inlet, and the centrifugal ventilator transmission gear 9 and the shaft 3 drive the centrifugal ventilator rotor 2 to rotate at high speed to separate the oil-gas mixture. The separated air goes from the middle of the shaft 3 to the air pressure regulating valve housing 5, and the separated lubricating oil flows along the oil pouring thread formed by the evenly divided crescent-shaped flow path holes on the inner surface of the centrifugal ventilator housing 1 to the lubricating oil outlet and returns to the lubricating oil tank along the return oil duct; the separated gas enters the air pressure regulating valve housing 5 through the shaft 3. When the engine is working on the ground, the gas entering the air pressure regulating valve housing 5 directly enters the atmosphere. When the engine reaches a certain altitude, the high-altitude valve 7 and one end of the secondary air channel 52 are sealed and blocked, and the damping spring 81 presses the damping valve 8 to seal and block the other end of the secondary air channel 52. When the separated gas pressure increases to a level greater than the damping spring force of the damping spring 81 and less than the damping spring force of the high-altitude valve spring 71, the damping valve 8 is separated from the other end of the secondary air channel 52 and opened, so that the separated gas is discharged from the air outlet, and the main air channel 51, the secondary air channel 52 and the centrifugal ventilator housing 1 of the air pressure regulating valve housing 5 are maintained at a certain pressure state.

Claims

1. A centrifugal ventilator with a high altitude valve, characterized in that: include: A centrifugal ventilator housing (1), wherein the centrifugal ventilator housing (1) is provided with an oil-air mixture inlet for the oil-air mixture to enter and an oil outlet for the separated oil to be discharged; An oil-gas separation component installed in the centrifugal ventilator housing (1) and separating the oil-gas mixture; A constant pressure component installed on the top of the centrifugal ventilator housing (1) and capable of retaining the separated gas at a certain pressure state, the constant pressure component being connected to the exhaust outlet of the oil-gas separation component; The oil-gas separation component comprises: a centrifugal ventilator rotor (2) having one end rotatably mounted in the inner space of a centrifugal ventilator housing (1) via a bearing, a structure for allowing an oil-gas mixture to enter and for separating the oil and gas being provided at the top of the centrifugal ventilator rotor (2); an opening for discharging separated gas being provided at the top of the centrifugal ventilator rotor (2), the opening being connected to the constant pressure component, thereby achieving communication between the constant pressure component and the exhaust outlet of the oil-gas separation component; A shaft (3) which is installed through the centrifugal ventilator rotor (2) and rotates together with the rotor; The constant pressure assembly comprises: an air pressure regulating valve housing (5) fixedly mounted on the top of a centrifugal ventilator housing (1); a main air passage (51) communicating with an opening at the top of a centrifugal ventilator rotor (2) is provided on the middle part of the air pressure regulating valve housing (5); a secondary air passage (52) communicating with the main air passage (51) is provided on the middle part of the air pressure regulating valve housing (5); both ends of the secondary air passage (52) are open; an air outlet for exhausting gas is provided on the air pressure regulating valve housing (5) outside the middle part; both ends of the secondary air passage (52) are open and can be connected with the air outlet to exhaust the air after oil and gas separation; A high altitude valve subassembly that opens one end of the secondary air passage (52) and controllably seals and blocks it, and a damping subassembly that opens the other end of the secondary air passage (52) and controlsably seals and blocks it; The high altitude valve subassembly comprises: a constant pressure housing (6) fixedly connected to a gas pressure regulating valve housing (5); A valve diaphragm box (10) is mounted on the constant pressure housing (6) and has an adjustable stroke via an adjusting screw (11); The high altitude valve (7) is installed between the valve membrane box (10) and the air pressure regulating valve housing (5) via the high altitude valve spring (71), and the high altitude valve (7) corresponds to the opening of one end of the secondary air passage (52) of the air pressure regulating valve housing (5).

2. The centrifugal ventilator with a high altitude valve according to claim 1, characterized in that: The inner wall of the centrifugal ventilator housing (1) is evenly provided with crescent-shaped flow path holes A for smooth collection of separated lubricating oil.

3. The centrifugal ventilator with a high altitude valve according to claim 1, characterized in that: A centrifugal fan transmission gear (9) is mounted on the shaft (3) located outside.

4. The centrifugal ventilator with a high altitude valve according to claim 1, characterized in that: The damping subassembly comprises: a damping valve (8) sealed and blocked with the other end opening of the secondary air channel (52); A damping spring (81) is provided at one end to press the damping valve (8) against the secondary air passage (52) and seal the other end of the secondary air passage. The other end of the damping spring (81) is installed in the air pressure regulating valve housing (5). The damping spring (81) can press the damping valve (8) to move in the air pressure regulating valve housing (5). The damping spring force of the damping spring (81) is smaller than the damping spring force of the high altitude valve spring (71).

5. The centrifugal ventilator with a high altitude valve according to claim 1, characterized in that: It also comprises an intermediate casing (4) which is rotatably mounted on the other end of the centrifugal ventilator rotor (2) via a bearing, and a constant pressure assembly is mounted on the intermediate casing (4).

Images