Oil-gas separator

Abstract

The invention provides an oil-gas separator. The oil-gas separator comprises a first cavity, an oil-gas inlet structure, a temperature sensor and a controller. The oil-gas inlet structure is connected with the first cavity and comprises an inlet pipeline, an electric flow regulating valve and a bimetallic strip, the inlet pipeline is in fluid communication with the first cavity, the electric flow regulating valve is arranged in the inlet pipeline, and the bimetallic strip is arranged in the inlet pipeline. The bimetallic strip is arranged at the joint of the inlet pipeline and the first cavity; when the oil gas temperature exceeds a threshold value, the bimetallic strip can be bent towards the inner side of the inlet pipeline so as to locally reduce the flow section, and the controller is electrically connected with the temperature sensor and the electric flow regulating valve. A temperature sensor mounted on the outer side wall of the first cavity and an electric flow regulating valve cooperate to control proper flow velocity and oil temperature; and when the oil gas temperature is too high, the bimetallic strip is bent towards the interior of the pipe to finely adjust the flow speed.

Description

Technical Field

[0001] The invention relates to an oil-gas separator. Background Art

[0002] In industrial equipment such as compressors and engines, the oil-gas separator is the core component to ensure the stable operation of the lubrication system. Its function is to efficiently separate the lubricating oil particles mixed in the compressed gas to avoid loss and environmental pollution caused by the discharge of oil with the gas. Traditional oil-gas separation technology mainly relies on the principles of cyclone separation, filtration and adsorption, but in actual applications, there are still prominent problems such as unstable filtration efficiency, high energy consumption, and high maintenance costs. Especially under complex working conditions (such as temperature fluctuations and flow rate changes), the performance is significantly reduced. The existing design lacks a dynamic control structure for flow rate and temperature, and it is difficult to adapt to changing working conditions. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide an oil-gas separator that integrates an electric flow control valve, a temperature sensor and a bimetallic mechanical control mechanism to construct a dual control structure of "active electric control + passive mechanical".

[0004] In order to solve the above technical problems, the present invention provides an oil-gas separator, comprising a first cavity, an oil-gas inlet structure, a temperature sensor and a controller; the temperature sensor is arranged on the outer wall of the first cavity; the oil-gas inlet structure is connected to the first cavity, the oil-gas inlet structure comprises an inlet pipe, an electric flow regulating valve and a bimetallic strip, the inlet pipe is fluidically connected to the first cavity, the electric flow regulating valve is arranged in the inlet pipe, the bimetallic strip is arranged at the connection between the inlet pipe and the first cavity, the bimetallic strip is laminated and composited by two layers of metal alloys with different thermal expansion coefficients; when the oil-gas temperature exceeds a threshold value, the bimetallic strip can bend toward the inner side of the inlet pipe to locally reduce the flow cross-section, the controller is electrically connected to the temperature sensor and the electric flow regulating valve, and the controller can adjust the opening of the electric flow regulating valve according to the real-time signal of the temperature sensor to control the oil-gas flow rate.

[0005] In a more preferred embodiment, the bimetallic strip is welded to the inner wall of the inlet pipe, and the bimetallic strip is arranged at one end of the inlet pipe close to the first cavity.

[0006] In a more preferred embodiment, the maximum bending angle of the bimetallic strip is 5°.

[0007] In a more preferred embodiment, the oil-gas separator further comprises a second cavity, the second cavity is arranged on the upper side of the inner space of the first cavity, an air intake space is formed between the second cavity and the first cavity, and the inlet pipe fluid is connected to the air intake space;

[0008] A plurality of guide convex strips are arranged at intervals along the circumference of the first cavity in the air intake space on the inner side of the first cavity, and the guide convex strips extend along the axial direction of the first cavity respectively, so as to form an axial airflow for the oil and gas entering the air intake space;

[0009] An inertial collision separator is disposed on the lower side of the second cavity, and a rectifier is also disposed on the lower side of the second cavity.

[0010] In a more preferred embodiment, the inertial collision separator is a wire mist catching net;

[0011] The rectifier comprises a conical rectifier portion and a spring, the rectifier surface of the conical rectifier faces downward, and the spring is connected to the conical rectifier.

[0012] In a more preferred embodiment, it also includes an oil and gas filter assembly; the oil and gas filter assembly is arranged in the second cavity; the oil and gas filter assembly includes a first filter and a second filter, the first filter is centrally stacked in the second cavity, the second filter is centrally stacked in the first filter, and the filtering accuracy of the second filter is greater than the filtering accuracy of the first filter.

[0013] In a more preferred embodiment, the first filter is a pleated oil filter element, which is made of stainless steel, has a pleated angle of 90°, and is arranged equidistantly along the circumferential direction.

[0014] In a more preferred embodiment, the second filter is a glass fiber filter element, and the glass fiber filter element includes an inner filter screen and an outer filter screen.

[0015] In a more preferred embodiment, it also includes an exhaust port, wherein the exhaust port is connected to the space surrounded by the inner filter screen.

[0016] In a more preferred embodiment, a magnet is further disposed at the bottom of the first cavity to absorb metal impurities in the oil.

[0017] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0018] The temperature sensor installed on the outer wall of the first cavity works together with the electric flow control valve to control the oil temperature. The two work together to control the appropriate flow rate and oil temperature. The bimetallic strip serves as an active control mechanism. When the oil temperature is too high, the bimetallic strip bends toward the inside of the tube to fine-tune the flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a side view of the oil-gas separator in the preferred embodiment of the present invention;

[0020] Figure 2 The oil-gas separator in the preferred embodiment of the present invention is Figure 1 Cross-sectional view in the MM direction;

[0021] Figure 3 is a cross-sectional view of the first cavity in a preferred embodiment of the present invention;

[0022] Figure 4 A schematic diagram of a bimetallic strip and an inlet pipe in a preferred embodiment of the present invention;

[0023] Figure 5 A schematic diagram of a rectifier in a preferred embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the oil and gas filter components stacked in the center in the preferred embodiment of the present invention;

[0025] Figure 7 is a three-dimensional schematic diagram of a first filter in a preferred embodiment of the present invention;

[0026] Figure 8 for Figure 7 A partial enlarged view of

[0027] Fig. 9 It is a cross-sectional view of the first filter in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] See also Figure 1-Figure 9, an oil-gas separator, comprising a first cavity 1, an oil-gas inlet structure 4, a temperature sensor 5 and a controller; the temperature sensor 5 is arranged on the outer wall of the first cavity 1; the oil-gas inlet structure 4 is connected to the first cavity 1, the oil-gas inlet structure 4 comprises an inlet pipe 41, an electric flow regulating valve 42 and a bimetallic strip 43, the inlet pipe 41 is fluidically connected to the first cavity 1, the electric flow regulating valve 42 is arranged in the inlet pipe 41, the bimetallic strip 43 is arranged at the connection between the inlet pipe 41 and the first cavity 1, the bimetallic strip 43 is laminated and composited by two layers of metal alloys with different thermal expansion coefficients; when the oil-gas temperature exceeds a threshold value, the bimetallic strip 43 bends toward the inner side of the inlet pipe 41 to partially reduce the flow cross-section, the controller is electrically connected to the temperature sensor 5 and the electric flow regulating valve 42, and the controller can adjust the opening of the electric flow regulating valve 42 according to the real-time signal of the temperature sensor 5 to control the oil-gas flow rate. The temperature sensor 5 installed on the outer wall of the first cavity 1 works together with the electric flow control valve 42 to control the oil temperature. Overheating will cause the oil to become viscous and affect the smoothness of the oil and gas. The two work together to control the appropriate flow rate and oil temperature. The bimetallic strip 43 acts as an active control mechanism. When the oil and gas temperature is too high, the bimetallic strip 43 bends toward the inside of the tube to fine-tune the flow rate.

[0030] In this embodiment, the bimetallic strip 43 is formed by laminating two layers of metal alloys with different thermal expansion coefficients, including an active layer and a passive layer. The active layer is made of a metal with a high expansion coefficient and elongates significantly when heated. The passive layer is made of a metal with a low expansion coefficient and deforms less when heated. The two metal layers are tightly combined by welding or rolling processes to form an integrated sheet structure. When the temperature rises, the active layer expands more than the passive layer, causing the bimetallic strip 43 to bend toward the passive layer; when the temperature drops, it bends in the opposite direction, achieving a direct response of temperature-deformation.

[0031] In this embodiment, the temperature sensor 5 is fixedly disposed on the outer wall of the first cavity 1 , and the sensing portion of the temperature sensor 5 extends into the first cavity 1 and is disposed close to the inlet pipe 41 .

[0032] In this embodiment, the bimetallic strip 43 is welded to the inner wall of the inlet pipe 41, and the bimetallic strip 43 is arranged at one end of the inlet pipe 41 close to the first cavity 1. The maximum bending angle of the bimetallic strip 43 is 5°, which plays a role of fine adjustment.

[0033] The oil-gas separator also includes a second cavity 2, which is arranged on the upper side of the internal space of the first cavity 1, and an air intake space 3 is formed between the second cavity 2 and the first cavity 1, and the inlet pipe 41 fluid is connected to the air intake space 3; the inner side of the first cavity 1 is provided with a plurality of guide ribs 11 arranged at intervals along the circumference of the first cavity 1 in the air intake space 3, and the guide ribs 11 extend along the axial direction of the first cavity 1 respectively, so as to form an axial airflow for the oil and gas entering the air intake space 3; an inertial collision separator 21 is provided on the lower side of the second cavity 2, and a rectifier 22 is also provided on the lower side of the second cavity 2. After the oil and gas enter the air intake space 3 through the inlet pipe 41, an axial airflow is formed in the axially downward direction due to the guiding effect of the guiding convex strip 11. After entering the lower side of the internal space of the first cavity 1, the airflow is upwardly directed to the rectifier 22 by the action of the bottom of the first cavity 1. The airflow flows along the rectifier 22 and forms a circular flow around the rectifier 22 to enter the inertial collision separator 21. The inertial collision separator 21 intercepts large oil droplets, and the circular flow continues to enter the second cavity 2. In this embodiment, the inertial collision separator 21 is a steel wire mist catcher.

[0034] In this embodiment, the rectifier 22 includes a conical rectifying part 221 and a spring 222. The rectifying surface of the conical rectifier 22 faces downward. The spring 222 is connected to the conical rectifier 22 and can be independently fine-tuned according to the flow velocity of the axial airflow to achieve the best rectification effect. The axial airflow disturbed by the rectifier 22 is transformed into an upward circulation and enters the steel wire mist collector for preliminary oil filtration.

[0035] The oil-gas separator also includes an oil-gas filter assembly; the oil-gas filter assembly is arranged in the second cavity 2; the oil-gas filter assembly includes a first filter 61 and a second filter 62, the first filter 61 is centrally stacked in the second cavity 2, the second filter 62 is centrally stacked in the first filter 61, and the filtering accuracy of the second filter 62 is greater than the filtering accuracy of the first filter 61. Since the two are centrally placed, positioning is not required, which is more convenient for installation, maintenance and maintenance. Moreover, since a gradient filtering accuracy is formed between the two, the filtering effect is better.

[0036] In this embodiment, the first filter 61 is a pleated oil filter element, which is made of stainless steel, and its peripheral wall is in the form of pleats arranged at intervals. Filter holes are arranged on the wall, and the pleats have a 90° angle and are arranged equidistantly along the circumference, so that the oil and gas can contact the filter screen more fully and achieve the best oil filtering effect. The second filter 62 is a glass fiber filter element, and the glass fiber filter element includes an inner filter screen 621 and an outer filter screen 622. After filtering by the wire mist collector and the pleated oil filter element, a small amount of oil still enters the second filter 62. The second filter 62 is a glass fiber filter material with high filtering accuracy, which can better precipitate the residual oil and gas.

[0037] In this embodiment, an exhaust port 7 is also included, and the exhaust port 7 is connected to the space surrounded by the inner filter screen 621. The exhaust port 7 can be opened as large as possible within the structural range. The larger the diameter, the smaller the exhaust gas flow rate, the smaller the ability to carry out oil, and ensure that the exhaust gas does not carry oil droplets and the exhaust is smooth.

[0038] In this embodiment, a magnet 12 is further provided at the bottom of the first cavity 1 to absorb metal impurities in the oil. The first cavity 1 is also provided with a refueling port 13, an oil viewing mirror 14, a sewage outlet 15 and an oil drain port 16. The refueling port 13 is used to replenish lubricating oil or cleaning agent. The oil viewing mirror 14 is used to observe the state of the oil. The sewage outlet 15 discharges deposited impurities. The oil drain port 16 discharges the separated pure oil.

[0039] The working process of the oil-gas separator is as follows: the oil-gas mixture first enters the first cavity 1 through the inlet pipe 41, and the electric flow regulating valve 42 dynamically adjusts the inlet flow rate according to the real-time monitoring data of the temperature sensor 5. At the same time, the bimetallic strip 43 bends inwardly (≤5°) when the temperature is too high to assist in fine-tuning the flow rate; after entering the first cavity 1, the oil and gas form an axial airflow along the guide convex strip 11 of the first cavity 1, and the metal impurities are adsorbed by the bottom magnet 12. Then the airflow rises to the second cavity 2, and the axial airflow is converted into a uniform annular flow through the bottom rectifier 22, and the large particles of oil droplets are intercepted upward through the steel wire mist collector; the annular flow continues to pass through the pleated oil filter element (90° angle stainless steel filter element) and the second filter 62 (high-efficiency glass fiber filter material) stacked thereon, and the clean gas is finally discharged from the exhaust port 7 at a low speed during the step-by-step filtration, and the separated oil settles to the bottom of the first cavity 1 and is recovered through the oil discharge port 16, and the impurities are regularly cleaned through the sewage outlet 15, so as to achieve efficient and low-cost oil-gas separation.

[0040] The above is only a preferred specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the present invention within the technical scope disclosed by the present invention shall be deemed to infringe the protection scope of the present invention.

Claims

1. An oil-gas separator, characterized in that: It includes a first cavity, an oil and gas inlet structure, a temperature sensor and a controller; the temperature sensor is arranged on the outer wall of the first cavity; the oil and gas inlet structure is connected to the first cavity, the oil and gas inlet structure includes an inlet pipe, an electric flow regulating valve and a bimetallic strip, the inlet pipe is fluidically connected to the first cavity, the electric flow regulating valve is arranged in the inlet pipe, the bimetallic strip is arranged at the connection between the inlet pipe and the first cavity, and the bimetallic strip is formed by laminating and compounding two layers of metal alloys with different thermal expansion coefficients; when the oil and gas temperature exceeds a threshold value, the bimetallic strip can bend toward the inside of the inlet pipe to partially reduce the flow cross-section, the controller is electrically connected to the temperature sensor and the electric flow regulating valve, and the controller can adjust the opening of the electric flow regulating valve according to the real-time signal of the temperature sensor to control the oil and gas flow rate.

2. An oil-gas separator as claimed in claim 1, characterized in that: The bimetallic strip is welded to the inner wall of the inlet pipe, and the bimetallic strip is arranged at one end of the inlet pipe close to the first cavity.

3. An oil-gas separator as claimed in claim 2, characterized in that: The maximum bending angle of the bimetallic strip is 5°.

4. An oil-gas separator as claimed in claim 1, characterized in that: The oil-gas separator further comprises a second cavity, which is arranged on the upper side of the inner space of the first cavity, an air intake space is formed between the second cavity and the first cavity, and the inlet pipe fluid is connected to the air intake space; A plurality of guide convex strips are arranged at intervals along the circumference of the first cavity in the air intake space on the inner side of the first cavity, and the guide convex strips extend along the axial direction of the first cavity respectively, so as to form an axial airflow for the oil and gas entering the air intake space; An inertial collision separator is disposed on the lower side of the second cavity, and a rectifier is also disposed on the lower side of the second cavity.

5. An oil-gas separator as claimed in claim 4, characterized in that: The inertial collision separator is a steel wire mist catching net; The rectifier comprises a conical rectifier portion and a spring, the rectifier surface of the conical rectifier faces downward, and the spring is connected to the conical rectifier.

6. An oil-gas separator as claimed in claim 4, characterized in that: It also includes an oil and gas filter assembly; the oil and gas filter assembly is arranged in the second cavity; the oil and gas filter assembly includes a first filter and a second filter, the first filter is centrally stacked in the second cavity, the second filter is centrally stacked in the first filter, and the filtering accuracy of the second filter is greater than the filtering accuracy of the first filter.

7. An oil-gas separator as claimed in claim 6, characterized in that: The first filter is a pleated oil filter element, which is made of a stainless steel filter mesh, with a pleat angle of 90° and arranged equidistantly along the circumferential direction.

8. An oil-gas separator as claimed in claim 6, characterized in that: The second filter is a glass fiber filter element, and the glass fiber filter element includes an inner filter screen and an outer filter screen.

9. An oil-gas separator as claimed in claim 8, characterized in that: It also includes an exhaust port, which is connected to the space surrounded by the inner filter screen.

10. The oil-gas separator according to claim 1, characterized in that: A magnet is also provided at the bottom of the first cavity to absorb metal impurities in the oil.

Images