CN220687995U - Oil mist recoverer for compressor gear box - Google Patents

Abstract

The utility model relates to an oil mist recoverer for a compressor gearbox. The utility model comprises an air inlet pipe and an air exhaust mechanism, and is structurally characterized in that: the cooling core is provided with a plurality of vertical cooling pipes, and is arranged in the cooler shell; the air inlet pipe is fixed at the bottom of the cooler shell, a circle of siphon groove is fixed on the outer wall of the top of the cooler shell, an oil drain port is arranged at the bottom of the siphon groove, and the oil drain port is communicated with the air inlet pipe through an oil return pipe; the separating cylinder is of a cylindrical structure, the bottom of the separating cylinder is fixed on the siphon groove, and the exhaust mechanism is fixed on the top of the separating cylinder; the separation inner core is fixed in the separating cylinder, the filter screen is wrapped on the outer wall of the separation inner core, and the inlet of the siphon groove is positioned between the outer wall of the filter screen and the inner wall of the separating cylinder. The utility model has simple structure, reasonable design and high oil mist separation efficiency, and can ensure that the internal pressure of the gear box is negative pressure.

Description

Oil mist recoverer for compressor gear box

Technical Field

The utility model relates to an oil mist recoverer, in particular to an oil mist recoverer for a compressor gear box, which is mainly used for recovering oil mist generated by a dry oil-free screw compressor gear box and belongs to the technical field of oil mist separation of compressors.

Background

The gear box of the dry oil-free screw compressor can generate oil mist in the working process, the generated oil mist can enable the pressure in the gear box to be positive pressure, the positive pressure in the gear box can influence the performance of the oil-free screw compressor, and even oil leakage of an oil seal cavity can be possibly caused. In general, the positive pressure in the gear box of the dry oil-free screw compressor cannot be more than 200pa, and the pressure in the gear box is preferably negative pressure, so that the phenomenon of oil leakage in an oil seal cavity is greatly reduced.

At present, a vacuum generator is generally adopted for manufacturing a negative pressure cavity for oil mist treatment and recovery of a gear box, and oil mist is discharged for oil-gas separation; or directly connects the outside of the gear box ventilation hole to the oil mist separator and to the atmosphere. The former oil mist recovery system is complex, the cost is high, and the operation difficulty is high; the latter has poor separation efficiency, and the gearbox always maintains positive pressure, affecting the performance of the compressor.

In summary, there is no oil mist recycling device with simple structure and high oil mist separation efficiency, which can ensure that the internal pressure of the gear box is negative pressure.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide the oil mist recoverer for the compressor gearbox, which has the advantages of simple structure, reasonable design and high oil mist separation efficiency and can ensure that the internal pressure of the gearbox is negative pressure.

The utility model solves the problems by adopting the following technical scheme: this an oil mist recoverer for compressor gear box includes intake pipe and exhaust mechanism, and its structural feature lies in: the cooling core is provided with a plurality of vertical cooling pipes, the cooling core is arranged in the cooler shell, an inlet and an outlet of the cooling core are respectively flush with the bottom and the top of the cooler shell, a water inlet is arranged at the lower part of the cooler shell, and a water outlet is arranged at the upper part of the cooler shell; the air inlet pipe is fixed at the bottom of the cooler shell, a circle of siphon groove is fixed on the outer wall of the top of the cooler shell, an oil drain port is arranged at the bottom of the siphon groove, and the oil drain port is communicated with the air inlet pipe through an oil return pipe; the separating cylinder is of a cylindrical structure, the bottom of the separating cylinder is fixed on the siphon groove, and the exhaust mechanism is fixed on the top of the separating cylinder; the separation inner core is of a hollow cylindrical structure with a sealed top, the separation inner core is fixed in the separation cylinder, the bottom inlet of the separation inner core is communicated with the top outlet of the cooling core, the filtering screen is wrapped on the outer wall of the separation inner core, and the inlet of the siphon groove is positioned between the outer wall of the filtering screen and the inner wall of the separation cylinder.

Preferably, the siphon tank comprises a tank body, a baffle plate, a top sealing plate and a side sealing plate, wherein the baffle plate is vertically fixed in the tank body and divides the tank body into an oil collecting tank and an oil draining tank, the oil collecting tank is arranged between the baffle plate and the inner ring wall surface, the oil draining tank is arranged between the baffle plate and the outer ring wall surface of the tank body, and the oil draining port is arranged at the bottom of the oil draining tank; one side of the top sealing plate is fixed at the top of the outer ring wall surface of the tank body, the other side of the top sealing plate is positioned right above the oil collecting groove, the partition plate is positioned right below the top sealing plate, and an overflow channel is arranged between the partition plate and the top sealing plate; the top of side shrouding is fixed at the opposite side of top shrouding, has the oily passageway of crossing between the bottom of this side shrouding and the bottom of oil collecting groove. The siphon groove prevents oil mist of the air inlet pipe from escaping to the separating cylinder through the oil return pipe by utilizing the pressure difference of high and low oil levels.

Preferably, the exhaust mechanism comprises a fan shell, a fan blade and a fan, wherein the fan shell is provided with an air inlet and an air outlet, the air inlet of the fan shell is communicated with the inside of the separating cylinder, the fan is fixed at the top of the fan shell, the fan blade is positioned in the fan, and the fan blade are connected.

Preferably, the vertical wall surface of the separating inner core is provided with a circumferential array of notches for oil mist circulation.

Preferably, the filter screen is a stainless steel woven screen, and is provided with a plurality of layers, and all the layers are arranged on the outer side of the separation inner core.

Preferably, the oil mist recoverer of the present utility model further comprises a pressure sensor mounted at a position of the intake pipe near the inlet. The pressure sensor is used for monitoring whether the negative pressure value generated by the fan is reasonable or not, and judging whether the filter screen is blocked or not through the negative pressure value so as to facilitate timely maintenance and cleaning.

Preferably, the oil mist recoverer further comprises a connecting piece, and an oil drain port in the siphon groove is connected with an oil return pipe through the connecting piece.

Preferably, the cooling pipes in the cooling core according to the utility model are arranged uniformly in the cooler housing.

Preferably, the top sealing plate is horizontal, and the top sealing plate is flush with the top of the cooler housing; the side sealing plates are vertical.

Preferably, the top of the separating cylinder and the bottom of the fan shell are respectively provided with an opening and are communicated.

The utility model provides an oil mist recovery method for compressor gear box which characterized in that: the oil mist recycling device for the compressor gearbox is used, and the oil mist recycling method comprises the following steps: under the drive of a fan, the fan blades are driven to rotate, so that high-temperature oil mist in the compressor gear box enters from the air inlet pipe, when the high-temperature oil mist enters into the cooling pipe of the cooling core through the air inlet pipe 1, the cooling water in the cooler shell enters from the water inlet at the lower part and is discharged from the water outlet at the upper part, the high-temperature oil mist is cooled, the oil mist is condensed into macromolecules by small molecules, part of the oil mist condensed into macromolecules is finally condensed into oil drops, the oil drops are attached to the inner wall of the cooling pipe of the cooling core, and flow to the air inlet pipe along the inner wall of the cooling pipe of the cooling core under the action of gravity, and finally flow back to the compressor gear box; the other part of oil mist condensed into macromolecules enters the separating inner core through the cooling core and flows out from the side wall of the separating inner core, then when the oil mist passes through the filtering screen, large oil drops are condensed on the surface of the filtering screen under the action of impact separation, a large amount of liquid oil is accumulated in the siphon groove, the liquid oil in the siphon groove flows into the air inlet pipe along the oil return pipe, and finally all the oil drops flow back to the compressor gearbox; the gas filtered and separated by the separation core and the filter screen passes through the exhaust mechanism and is finally discharged to the atmosphere through the exhaust port 11.

Compared with the prior art, the utility model has the following advantages and effects: the oil mist recoverer for the compressor gear box can realize oil mist separation and recovery of the compressor gear box, keep the internal pressure of the compressor gear box as negative pressure and greatly reduce oil leakage of an oil seal cavity. According to the utility model, by combining with the design of the siphon groove, oil mist does not escape, and the oil mist is completely cooled and separated, so that the oil mist separation effect is good. The oil mist separation device is simple in structure and reasonable in design, and oil mist separation efficiency is greatly improved by well separating oil mist through condensation. The utility model can clearly know whether the filter screen is blocked or not by utilizing the monitoring of the pressure sensor, and is convenient for timely maintenance and cleaning.

Drawings

In order to more clearly illustrate the embodiments of the utility model and/or the technical solutions of the prior art, the drawings that are required in the description of the embodiments and/or the prior art will be briefly described below, it being obvious that the drawings in the description below are only some embodiments of the utility model and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic top view of an oil mist eliminator for a compressor gearbox in an embodiment of the present utility model.

Fig. 2 is a schematic perspective view of an oil mist recoverer for a compressor gearbox in an embodiment of the present utility model.

Fig. 3 is a schematic view showing an internal structure of an oil mist recoverer for a compressor gearbox in an embodiment of the present utility model.

FIG. 4 is a schematic diagram of a siphon tank according to an embodiment of the present utility model.

Fig. 5 is a schematic diagram of the structure of the siphon tank according to the embodiment of the present utility model after collecting the separated liquid oil.

In the figure: 1-an air inlet pipe; 2-a water inlet; 3-a cooler housing; 4-a water outlet; 5-separating the inner core; 6-a filter screen; 7-a separating cylinder; 8-a fan housing; 9-fan blades; 10-a fan; 11-exhaust port; 12-siphon tank; 13-a connector; 14-an oil return pipe; 15-cooling cores; 16-a pressure sensor; 17-an exhaust mechanism; 18-liquid oil; 121-a tank body; 122-an outer ring wall; 123-inner ring wall surface; 124-separator; 125-oil sump; 126-oil drain grooves; 127-top closure plate; 128-side seal plates; 129-overflow channel; 130-an oil passage; 131-an oil drain port.

Detailed Description

The present utility model will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present utility model and not limited to the following examples.

Examples

Referring to fig. 1 to 5, the oil mist recoverer for a compressor gear box in the present embodiment includes an air intake pipe 1, a cooler housing 3, a cooling core 15, a separation cylinder 7, a separation core 5, a filter wire mesh 6, a connecting member 13, an oil return pipe 14, a pressure sensor 16, and an air exhaust mechanism 17, wherein the filter wire mesh 6 is a stainless steel mesh, and the filter wire mesh 6 is provided with a plurality of layers.

The intake pipe 1 in the present embodiment is fixed to the bottom of the cooler housing 3, and the pressure sensor 16 is installed at a position of the intake pipe 1 near the inlet. The pressure sensor 16 is used for monitoring whether the negative pressure value generated by the fan 10 is reasonable or not, and judging whether the filter screen 6 is blocked or not through the negative pressure value so as to maintain and clean in time.

The cooling core 15 in this embodiment is provided with a plurality of vertical cooling pipes, the cooling core 15 is installed in the cooler housing 3, and the cooling pipes in the cooling core 15 are uniformly arranged in the cooler housing 3. The inlet and outlet of the cooling core 15 are flush with the bottom and top of the cooler housing 3, respectively, the lower part of the cooler housing 3 is provided with a water inlet 2, and the upper part of the cooler housing 3 is provided with a water outlet 4. The oil mist enters from the inlet at the bottom of the cooling pipe of the cooling core 15, flows through the entire cooling pipe, and then flows out from the outlet at the top of the cooling pipe. Cooling water for cooling enters the cooler housing 3 from the water inlet 2 of the cooler housing 3, and exchanges heat with the cooling pipes of the cooling core 15, so that oil mist in the cooling pipes of the cooling core 15 is cooled, and the cooling water after heat exchange flows out from the water outlet 4 of the cooler housing 3.

The outer wall of the top of the cooler housing 3 in this embodiment is fixed with a ring of siphon groove 12, the bottom of the siphon groove 12 is provided with an oil drain port 131, the oil drain port 131 is communicated with the air inlet pipe 1 through an oil return pipe 14, and in normal circumstances, the oil drain port 131 in the siphon groove 12 is connected with the oil return pipe 14 through a connecting piece 13.

The separating cylinder 7 in the present embodiment has a cylindrical structure, the bottom of the separating cylinder 7 is fixed to the siphon tank 12, and the air exhaust mechanism 17 is fixed to the top of the separating cylinder 7. The exhaust mechanism 17 in this embodiment includes a blower housing 8, a blower blade 9 and a blower 10, the blower housing 8 is provided with an air inlet and an air outlet 11, the air inlet of the blower housing 8 is communicated with the inside of the separating drum 7, the blower 10 is fixed at the top of the blower housing 8, the blower blade 9 is located in the blower 10, and the blower 10 and the blower blade 9 are connected.

The separating core 5 in this embodiment is a hollow cylindrical structure with a sealed top, the separating core 5 is fixed in the separating cylinder 7, the bottom inlet of the separating core 5 is communicated with the top outlet of the cooling core 15, the filtering screen 6 is wrapped on the outer wall of the separating core 5, and the inlet of the siphon groove 12 is located between the outer wall of the filtering screen 6 and the inner wall of the separating cylinder 7. The top of the separating cylinder 7 and the bottom of the fan shell 8 are respectively provided with an opening and are communicated.

The siphon tank 12 in this embodiment includes a tank body 121, a partition plate 124, a top seal plate 127 and a side seal plate 128, the partition plate 124 is vertically fixed in the tank body 121 and partitions the tank body 121 into a sump 125 and an oil drain 126, the sump 125 is located between the partition plate 124 and the inner ring wall 123, the oil drain 126 is located between the partition plate 124 and the outer ring wall 122 of the tank body 121, and the oil drain 131 is disposed at the bottom of the oil drain 126. One side of the top sealing plate 127 in this embodiment is fixed on the top of the outer ring wall surface 122 of the tank body 121, the other side of the top sealing plate 127 is located directly above the oil sump 125, the partition plate 124 is located directly below the top sealing plate 127, and an overflow channel 129 exists between the partition plate 124 and the top sealing plate 127. The top of the side seal plate 128 in this embodiment is fixed to the other side of the top seal plate 127, the side seal plate 128 is located in the oil sump 125, and an oil passage 130 exists between the bottom of the side seal plate 128 and the bottom of the oil sump 125. The siphon groove 12 in the embodiment prevents oil mist of the air inlet pipe 1 from escaping to the separating cylinder 7 through the oil return pipe 14 by utilizing the pressure difference of high and low oil levels, thereby greatly improving the oil mist separating effect.

Typically, the top seal plate 127 in this embodiment is horizontal, and the top seal plate 127 is flush with the top of the cooler housing 3; the side seal plates 128 are vertical. The vertical wall of the separating core 5 is provided with a circumferential array of notches for the circulation of oil mist.

The oil mist recovery method for the compressor gearbox in the embodiment comprises the following steps: under the drive of the fan 10, the fan blades 9 are driven to rotate, so that when high-temperature oil mist in the compressor gear box enters from the air inlet pipe 1 and enters into the cooling pipe of the cooling core 15 through the air inlet pipe 1, as cooling water in the cooler shell 3 enters from the water inlet 2 at the lower part and is discharged from the water outlet 4 at the upper part, the high-temperature oil mist is cooled, the oil mist is condensed into macromolecules by small molecules, part of the oil mist condensed into macromolecules is finally condensed into oil drops, the oil drops are attached to the inner wall of the cooling pipe of the cooling core 15, and flow to the air inlet pipe 1 along the inner wall of the cooling pipe of the cooling core 15 under the action of gravity and finally flow back to the compressor gear box; the other part of oil mist condensed into macromolecules enters the separating inner core 5 through the cooling core 15 and flows out from the side wall of the separating inner core 5, then large oil drops are condensed on the surface of the filtering screen 6 under the action of impact separation when passing through the filtering screen 6, a large amount of liquid oil 18 is accumulated in the siphon groove 12, the liquid oil 18 in the siphon groove 12 flows into the air inlet pipe 1 along the oil return pipe 14, and finally all the oil drops flow back to the compressor gearbox; the gas filtered and separated by the separation core 5 and the filter screen 6 passes through the exhaust mechanism 17 and is finally discharged to the atmosphere through the exhaust port 11.

In addition, it should be noted that the specific embodiments described in the present specification may vary from part to part, from name to name, etc., and the above description in the present specification is merely illustrative of the structure of the present utility model. All equivalent or simple changes of the structure, characteristics and principle according to the inventive concept are included in the protection scope of the present patent. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the utility model as defined in the accompanying claims.

Claims (10)

1. An oil mist recoverer for a compressor gearbox, comprising an air inlet pipe (1) and an air exhaust mechanism (17), and being characterized in that: the novel cooler comprises a cooler body (3), a cooling core (15), a separating cylinder (7), a separating inner core (5), a filtering screen (6) and an oil return pipe (14), wherein the cooling core (15) is provided with a plurality of vertical cooling pipes, the cooling core (15) is arranged in the cooler body (3), an inlet and an outlet of the cooling core (15) are respectively flush with the bottom and the top of the cooler body (3), a water inlet (2) is formed in the lower portion of the cooler body (3), and a water outlet (4) is formed in the upper portion of the cooler body (3); the air inlet pipe (1) is fixed at the bottom of the cooler shell (3), a circle of siphon grooves (12) are fixed on the outer wall of the top of the cooler shell (3), an oil drain port (131) is arranged at the bottom of each siphon groove (12), and the oil drain port (131) is communicated with the air inlet pipe (1) through an oil return pipe (14); the separating cylinder (7) is of a cylindrical structure, the bottom of the separating cylinder (7) is fixed on the siphon groove (12), and the exhaust mechanism (17) is fixed at the top of the separating cylinder (7); the separation inner core (5) is of a hollow cylindrical structure with a sealed top, the separation inner core (5) is fixed in the separation barrel (7), an inlet of the separation inner core (5) is communicated with an outlet of the cooling core (15), the filtering screen (6) is wrapped on the outer wall of the separation inner core (5), and an inlet of the siphon groove (12) is positioned between the outer wall of the filtering screen (6) and the inner wall of the separation barrel (7).

2. An oil mist eliminator for a compressor gearbox as claimed in claim 1, wherein: the siphon groove (12) comprises a groove body (121), a partition plate (124), a top sealing plate (127) and side sealing plates (128), wherein the partition plate (124) is vertically fixed in the groove body (121) and divides the groove body (121) into an oil collecting groove (125) and an oil draining groove (126), the oil collecting groove (125) is arranged between the partition plate (124) and the inner ring wall surface (123), the oil draining groove (126) is arranged between the partition plate (124) and the outer ring wall surface (122) of the groove body (121), and the oil draining port (131) is arranged at the bottom of the oil draining groove (126); one side of the top sealing plate (127) is fixed at the top of the outer ring wall surface (122) of the groove body (121), the other side of the top sealing plate (127) is positioned right above the oil collecting groove (125), the partition plate (124) is positioned right below the top sealing plate (127), and an overflow channel (129) is arranged between the partition plate (124) and the top sealing plate (127); the top of the side sealing plate (128) is fixed on the other side of the top sealing plate (127), and an oil passing channel (130) is arranged between the bottom of the side sealing plate (128) and the bottom of the oil collecting groove (125).

3. An oil mist eliminator for a compressor gearbox as claimed in claim 1, wherein: the air exhaust mechanism (17) comprises a fan shell (8), fan blades (9) and a fan (10), wherein the fan shell (8) is provided with an air inlet and an air outlet (11), the air inlet of the fan shell (8) is communicated with the inside of the separating cylinder (7), the fan (10) is fixed at the top of the fan shell (8), the fan blades (9) are positioned in the fan (10), and the fan (10) and the fan blades (9) are connected.

4. An oil mist eliminator for a compressor gearbox as claimed in claim 1, wherein: the vertical wall surface of the separating inner core (5) is provided with a circumferential array of notches for oil mist circulation.

5. An oil mist eliminator for a compressor gearbox as claimed in claim 1, wherein: the filter screen (6) is a stainless steel woven mesh, and the filter screen (6) is provided with a plurality of layers and is arranged on the outer side of the separation inner core (5).

6. An oil mist eliminator for a compressor gearbox as claimed in claim 1, wherein: the oil mist recoverer further comprises a pressure sensor (16), and the pressure sensor (16) is arranged at a position, close to the inlet, of the air inlet pipe (1).

7. An oil mist eliminator for a compressor gearbox as claimed in claim 1, wherein: the oil mist recoverer further comprises a connecting piece (13), and an oil drain port (131) in the siphon groove (12) is connected with an oil return pipe (14) through the connecting piece (13).

8. An oil mist eliminator for a compressor gearbox as claimed in claim 1, wherein: the cooling pipes in the cooling core (15) are uniformly arranged in the cooler housing (3).

9. An oil mist eliminator for a compressor gearbox as claimed in claim 2, characterized in that: the top sealing plate (127) is horizontal, and the top sealing plate (127) is flush with the top of the cooler shell (3); the side sealing plates (128) are vertical.

10. An oil mist eliminator for a compressor gearbox as claimed in claim 3, characterized in that: the top of the separating cylinder (7) and the bottom of the fan shell (8) are respectively provided with an opening and are communicated.