CN210769596U

CN210769596U - Closed sealed supplementary lubrication supercharging device

Info

Publication number: CN210769596U
Application number: CN201920964586.1U
Authority: CN
Inventors: 许静; 吕忠思; 翁辉辉
Original assignee: Hangzhou Dianzi University
Current assignee: Hangzhou Dianzi University
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-06-16
Anticipated expiration: 2029-06-25

Abstract

The utility model belongs to the technical field of mechanical seal, concretely relates to sealed supplementary lubricated supercharging device of closed, which comprises a tank body, one side of the jar body has the pump connecting portion that are used for being connected with the pump, and the internal setting of jar has elastic diaphragm assembly, and the lower extreme of the jar body sets up first container, first container sets up the joint, diaphragm assembly separates into two parts with the internal space of jar, and one part is the first stock solution chamber of being connected with the pump connecting portion, and the other part is the second stock solution chamber of being connected with first container. The utility model discloses can provide lubrication and pressure boost for equipment simultaneously, reduce equipment medium to mechanical seal structure's in it impact, can prolong mechanical seal structure's life.

Description

Closed sealed supplementary lubrication supercharging device

Technical Field

The utility model belongs to the technical field of mechanical seal, concretely relates to closed sealed lubricated supercharging device of assistance.

Background

The mechanical seal is a shaft seal lubricating and pressurizing device of a rotating machine. Such as centrifugal pumps, centrifuges, reaction kettles, compressors, and the like. Since the drive shaft extends through the interior and exterior of the apparatus, a circumferential gap exists between the shaft and the apparatus through which the medium in the apparatus leaks outwardly, and if the pressure in the apparatus is below atmospheric pressure, air leaks into the apparatus, requiring the use of a mechanical seal.

In the mechanical seal, the medium inside the device usually impacts the mechanical seal structure, so that the mechanical seal structure is easy to be damaged by fatigue, for example, the pressure of the medium inside the device is increased while the device is lubricated, which is a troublesome problem.

SUMMERY OF THE UTILITY MODEL

In order to compensate for the defects of the prior art, the utility model provides a closed sealing auxiliary lubrication supercharging device's technical scheme.

The closed type sealing auxiliary lubricating and pressurizing device is characterized by comprising a tank body, wherein a pump connecting part used for being connected with a pump is arranged on one side of the tank body, an elastic diaphragm assembly is arranged in the tank body, a first container is arranged at the lower end of the tank body, a joint is arranged on the first container, the diaphragm assembly divides a space in the tank body into two parts, one part is a first liquid storage cavity connected with the pump connecting part, and the other part is a second liquid storage cavity connected with the first container.

The closed type sealing auxiliary lubricating and pressurizing device is characterized in that the diaphragm component comprises a fixed pressing plate, a corrugated pipe and a sealing pressing plate which are sequentially connected in a matched mode, the fixed pressing plate is fixedly connected to the tank body, and the corrugated pipe can stretch out and draw back.

The closed type sealing auxiliary lubricating and pressurizing device is characterized in that the diaphragm component further comprises a limiting rod fixedly connected with the sealing pressure plate, and the limiting rod is connected with the fixing pressure plate in a sliding mode.

The closed type sealing auxiliary lubricating and pressurizing device is characterized in that the tank body is divided into two parts by the fixed pressing plate, and the corrugated pipe and the sealing pressing plate are positioned in the second liquid storage cavity.

The closed sealing auxiliary lubrication supercharging device is characterized in that a compensation assembly is arranged on the tank body, the compensation assembly comprises a connecting seat fixedly connected with the tank body, a second container fixedly connected with the connecting seat and three valves arranged on the connecting seat, the three valves are respectively a first valve, a second valve and a third valve, a plurality of compensation channels enabling the valves to be communicated with a first liquid storage cavity of the tank body are arranged on the connecting seat, the first valve is a one-way valve only allowing a medium to flow from the tank body to the second container, the second valve is a one-way valve only allowing gas to flow from the tank body to the second container, and the third valve is a one-way valve only allowing the medium to flow from the second container to the tank body.

The closed type sealing auxiliary lubrication supercharging device is characterized in that the first valve comprises a first valve body, a first valve rod and a first spring, a first inflow channel is formed in the first valve body, the first inflow channel is communicated with corresponding compensation channels in the second container and the connecting seat respectively, the first valve rod is connected to the first valve body in a sliding mode, the first spring is arranged in the first valve body and can extrude the first valve rod upwards, a first valve core is arranged at the lower end of the first valve rod, and the first valve core can upwards block an inlet of the first inflow channel.

The closed type sealing auxiliary lubricating and pressurizing device is characterized in that the second valve comprises a second valve body and a valve ball, the second valve body is provided with a second inflow channel, two ends of the second inflow channel are respectively communicated with the second container and a corresponding compensation channel, the middle of the second inflow channel is provided with a valve cavity, the cross section of the valve cavity is larger than that of the second inflow channel, the valve ball is arranged in the valve cavity, and the valve ball can block two upper connecting ports and two lower connecting ports of the valve cavity and the second inflow channel.

The closed type sealing auxiliary lubrication supercharging device is characterized in that the third valve comprises a third valve body, a third valve rod and a third spring, a third flow inlet channel is formed in the lower end of the third valve body and is respectively communicated with a second container and a corresponding compensation channel on the connecting seat, the third valve rod is connected to the third valve body in a sliding mode, the third spring is arranged in the third valve body and can downwards extrude the third valve rod, a third valve core is arranged at the lower end of the third valve rod, and the third valve core can downwards block an inlet of the third flow inlet channel.

The utility model has the advantages that: the utility model discloses can provide lubrication and pressure boost for equipment simultaneously, reduce equipment medium to mechanical seal structure's in it impact, can prolong mechanical seal structure's life.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view of FIG. 1 at B;

FIG. 4 is an enlarged view of FIG. 3 at C;

FIG. 5 is an enlarged view of FIG. 3 at D;

fig. 6 is an enlarged view of fig. 3 at E.

In the figure: in the figure: the liquid storage device comprises a tank body 4, a flange 400, a first liquid storage cavity 401, a second liquid storage cavity 402, a diaphragm assembly 5, a fixed pressing plate 500, a corrugated pipe 501, a sealing pressing plate 502, a limiting rod 503, a first container 6, a connector 7, a connecting seat 8, a compensation passage 800, a second container 9, a first valve 10, a first valve body 1000, a first inflow passage 10000, a first valve rod 1001, a first spring 1002, a second valve 11, a second valve body 1100, a valve ball 1101, a second inflow passage 11000, a valve cavity 11001, a third valve 12, a third valve body 1200, a third inflow passage 12000, a third valve rod 1201, a third spring 1202 and a third valve core 1203.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 to 6, the enclosed sealing auxiliary lubrication pressurizing device comprises a tank 4, one side of the tank 4 is provided with a pump connecting part for connecting with a pump, the pump connecting part is a flange 400, and the flange 400 is used for connecting with a pump capable of generating pressure pulses, namely a displacement pump, including a plunger pump, a diaphragm pump, a rotor pump and the like. An elastic diaphragm component 5 is arranged in the tank body 4, the lower end of the tank body 4 is fixedly connected with a first container 6 used for storing lubricating liquid, the first container 6 is of a tubular structure, and the first container 6 can be connected with a liquid injection channel on equipment through a joint. The diaphragm assembly 5 divides the space in the tank 4 into two parts, one part is a first reservoir 401 connected to the pump connection part, and the other part is a second reservoir 402 connected to the first container 6. The upper end of the tank body 4 is provided with a compensation component.

Specific structure of the diaphragm assembly: the diaphragm component 5 comprises a fixed pressing plate 500, a corrugated pipe 501 and a sealing pressing plate 502 which are sequentially matched and connected, the fixed pressing plate 500 is fixedly connected to the tank body 4, the corrugated pipe 501 is made of rubber materials, has certain elasticity and can stretch out and draw back, the fixed pressing plate 500 is not of a solid structure and can allow a medium to pass through, the sealing pressing plate 502 is of a solid structure and cannot allow the medium to pass through, and the fixed pressing plate 500 and the sealing pressing plate 502 both press the corrugated pipe 501 tightly to ensure that the corrugated pipe 501 does not leak. In addition, the diaphragm component 5 further comprises a limiting rod 503 fixedly connected with the sealing pressure plate 502, the limiting rod 503 is slidably connected with the fixed pressure plate 500, and the limiting rod 503 can ensure that the diaphragm component can only axially extend and retract up and down to keep stable. The fixed pressing plate 500 structurally partitions the tank body 4 into two parts, the part connected with the flange 400 is a first liquid storage cavity 401, the part connected with the first container 6 is a second liquid storage cavity 402, the corrugated pipe 501 and the sealing pressing plate 502 are positioned in the second liquid storage cavity 402, the sealing pressing plate 502 partitions the space in the tank body 4 into two parts, one part is communicated with the flange 400, and the other part is communicated with the first container 6.

The concrete structure of the compensating assembly: the compensation assembly comprises a connecting seat 8 fixedly connected with the tank body 4, a second container 9 fixedly connected with the connecting seat 8, and three valves arranged on the connecting seat 8. The connecting seat 8 may be an integral structure, or a seat body formed by fixedly connecting a plurality of components. The second container 9 may also be of a unitary construction or may be of a container construction in which a plurality of parts are fixedly connected. The three valves are respectively a first valve 10, a second valve 11 and a third valve 12, and the connecting seat 8 is provided with a plurality of compensating channels 800 which enable the valves to be communicated with the tank 4. The first valve 10 is a one-way valve which only allows the medium to flow from the tank 4 to the second container 9, the second valve 11 is a one-way valve which only allows the gas to flow from the tank 4 to the second container 9, and the third valve 12 is a one-way valve which only allows the medium to flow from the second container 9 to the tank 4.

Obviously, there are many valves capable of performing the functions of the first valve 10, the second valve 11 and the third valve 12 in the prior art, and the first valve 10, the second valve 11 and the third valve 12 in the present invention are also conventional valve structures, and the specific structure is as follows:

a first valve: first valve 10 includes first valve body 1000, first valve rod 1001 and first spring 1002, first inlet channel 10000 has on the first valve body 1000, first inlet channel 10000 communicates with compensation passageway 800 that corresponds on second container 9 and the connecting seat 8 respectively, first valve rod 1001 sliding connection is in first valve body 1000, first spring 1002 sets up in first valve body 1000, cup joints on first valve rod 1001, the upper end and the first valve rod 1001 butt of first spring 1002, lower extreme and first valve body 1000 butt, and first spring 1002 can upwards extrude first valve rod 1001, and the lower extreme of first valve rod 1001 has first case 1003, the cross sectional area of first case 1003 is greater than the cross sectional area of first inlet channel 10000 import, and the import of first inlet channel 10000 can be stopped up upwards to first case 1003. The first valve body 1000 may have an integral structure or a valve body structure in which a plurality of components are fixedly connected, and the first valve rod 1001 may also have an integral structure or a valve rod structure in which a plurality of components are fixedly connected. In addition, the first valve 10 has other conventional valve components, and the structure and connection manner thereof are well known in the art, and those skilled in the art can clearly understand from the drawings, and thus will not be described in detail.

A second valve: the second valve 11 includes a second valve body 1100 and a valve ball 1101, the second valve body 1100 has a second inlet channel 11000, two ends of the second inlet channel 11000 are respectively communicated with the second container 9 and a corresponding compensation channel 800, a valve chamber 11001 is arranged in the middle of the second inlet channel 11000, the cross section of the valve chamber 11001 is larger than that of the second inlet channel 11000, the valve ball 1101 is arranged in the valve chamber 11001, and the valve ball 1101 can block two upper and lower connecting ports of the valve chamber 11001 and the second inlet channel 11000. The second valve body 1100 may have an integral structure or a valve body structure in which a plurality of parts are fixedly connected to each other. In addition, the second valve 11 has other conventional valve components, and the structure and connection manner thereof are well known in the art, and those skilled in the art can clearly understand from the drawings, and therefore, the description thereof is omitted.

A third valve: the third valve 12 includes a third valve body 1200, a third valve rod 1201 and a third spring 1202, the lower end of the third valve body 1200 is provided with a third inlet channel 12000, the third inlet channel 12000 is respectively communicated with the second container 9 and the corresponding compensation channel 800 on the connecting seat 8, the third valve rod 1201 is slidably connected to the third valve body 1200, the lower end of the third valve rod 1201 is provided with a third valve core 1203, a third spring 1202 is arranged in the third valve body 1200, the third spring 1202 is sleeved on the third valve rod 1201, the upper end of the third spring 1202 is abutted against the third valve body 1200 through a fixing sleeve, the lower end of the third spring 1202 is abutted against the third valve core 1203, the third spring 1202 can press the third valve rod 1201 downwards, the cross-sectional area of the third poppet 1203 is greater than the cross-sectional area of the inlet of the third flow admission passage 12000, the third poppet 1203, in a downward direction, may block the inlet of the third flow inlet channel 12000. The third valve body 1200 may be an integral structure or a valve body structure in which a plurality of parts are fixedly connected, and the third stem 1201 may also be an integral structure or a stem structure in which a plurality of parts are fixedly connected. In addition, the third valve 12 has other conventional valve components, and the structure and connection thereof are well known in the art, and those skilled in the art can clearly understand from the drawings, and therefore, the description thereof is omitted.

The main working principle of the invention is as follows: after the medium of the displacement pump is led to the tank body 4, the pressure of the medium is transmitted to the lubricating liquid in the first container 6 through the diaphragm component 5, and then the pressure of the medium is transmitted into the interior of the equipment through the lubricating liquid, so that the lubrication and pressurization of the equipment can be realized, the pressure of the lubricating liquid is offset with the pressure of the medium in the equipment, the fatigue degree of a mechanical sealing structure is reduced, and the service life is prolonged. In addition, since the lubricating fluid in the first container 6 is used for lubrication, the lubricating fluid may be lost, when the lubricating fluid is reduced, the pressure on the lower side of the bellows 501 may become small, the bellows 501 may extend downward under the influence of the pressure difference to maintain pressure balance, that is, the amplitude when the bellows 501 extends downward may become large, and when the bellows 501 extends downward, the sealing pressure plate 502 may press the lubricating fluid downward to supply the lubricating fluid forward.

The compensation principle in the invention is as follows: sometimes, the medium conveyed by the displacement pump is in a gas-liquid mixed conveying state, so that the medium contains gas, and the medium returns very fast when the pressure of the displacement pump is released due to the compressibility of the gas, so that the expansion amplitude of the corrugated pipe 501 is too large, namely the expansion action is large, and the fatigue damage is easy to occur. In order to prevent the expansion amplitude of the bellows 501 from being too large, three points of fluid infusion, fluid drainage and air drainage need to be achieved. Liquid supplementing: when the corrugated pipe 501 extends downwards, the pressure of the medium in the diaphragm cavity of the diaphragm assembly is reduced, the first valve core 1001 in the first valve 10 is influenced by the pressure difference and is attracted downwards, the first inflow channel 10000 is opened, and the medium in the second container 9 is supplemented into the first liquid storage cavity 401 of the tank 4, so that the maximum value of the corrugated pipe 501 during extension can be reduced, and the fatigue degree of the corrugated pipe 501 is further reduced. Discharging liquid: when the bellows 501 retracts upwards, the pressure of the medium inside the first reservoir 401 increases, the third valve core 1201 of the third valve 12 is pressed upwards due to the pressure difference, the third flow inlet channel 12000 is opened, and the medium inside the first reservoir 401 flows to the second container 9 through the third valve 12, so that the maximum retraction value of the bellows 501 can be reduced, and the fatigue degree of the bellows 501 is further reduced. Air bleeding: when the gas pressure in the first liquid storage cavity 401 reaches a certain degree, the gas pushes the valve ball 1101 away, the gas enters the second container 9, when the liquid passes through, the liquid pushes the valve ball 1101 upwards, the valve ball 1101 blocks the third flow inlet channel 11000, the liquid cannot enter the second container 9, and the gas passes through the gas firstly because the gas is above the liquid, the gas is discharged firstly, and the liquid cannot enter the second container 9, so that the liquid in the first liquid storage cavity 401 can be ensured.

The utility model discloses a main theory of operation: will the utility model discloses a flange 400 will connect on the export of displacement pump, will connect 7 to receive the filling liquid passageway 3 import of displacement pump, and the internal pressure of displacement pump keeps pressure and frequency the same basically with the export medium. The medium of the displacement pump is led into the tank body 4, the first container 6 is provided with lubricating liquid, the bellows 501 and the sealing pressure plate 502 separate the medium of the displacement pump from the lubricating liquid in the first container 6, the pressure in the medium is transmitted to the lubricating liquid through the expansion and contraction of the diaphragm assembly 5, the lubricating liquid acts on the outer side of the first bellows 202 again, the pressure on the inner side and the outer side of the first bellows 202 is offset, balance is generated, the pressure difference on the inner side and the outer side of the first bellows 202 is eliminated or reduced as much as possible, and the first bellows 202 is prevented from being damaged due to fatigue. Since the lubricating fluid in the first container 6 is used for lubricating the mechanical sealing structure of the static ring corrugated pipe, the lubricating fluid is lost, when the lubricating fluid is reduced, the pressure on the lower side of the corrugated pipe 501 is reduced, the corrugated pipe 501 extends downwards under the influence of the pressure difference to keep pressure balance, that is, the amplitude when the corrugated pipe 501 extends is increased, and when the corrugated pipe 501 extends downwards, the sealing pressing plate 502 presses the lubricating fluid downwards to supply the lubricating fluid forwards.

The utility model provides a compensation assembly's effect: sometimes, the medium delivered by the displacement pump is in a gas-liquid mixed delivery state, so that the diaphragm cavity formed by the first liquid storage cavity 401 and the diaphragm assembly 5 contains gas, and the gas has compressibility, so that the medium returns very fast when the pressure of the displacement pump is released, and the bellows 501 has an excessively large expansion amplitude, that is, large expansion and contraction action, and is prone to fatigue damage. In order to prevent the expansion amplitude of the bellows 501 from being too large, three points of fluid infusion, fluid drainage and air drainage need to be achieved. Liquid supplementing: when the corrugated pipe 501 extends downwards, the pressure of the medium in the diaphragm cavity is reduced, the first valve core 1001 in the first valve 10 is influenced by pressure difference and is attracted downwards, the first inflow channel 10000 is opened, and the medium in the second container 9 is supplemented into the first liquid storage cavity 401 of the tank 4, so that the maximum value of the corrugated pipe 501 during extension can be reduced, and the fatigue degree of the corrugated pipe 501 is further reduced. Discharging liquid: when the bellows 501 retracts upwards, the pressure of the medium inside the first reservoir 401 increases, the third valve core 1201 of the third valve 12 is pressed upwards due to the pressure difference, the third flow inlet channel 12000 is opened, and the medium inside the first reservoir 401 flows to the second container 9 through the third valve 12, so that the maximum retraction value of the bellows 501 can be reduced, and the fatigue degree of the bellows 501 is further reduced. Air bleeding: when the gas pressure in the first liquid storage cavity 401 reaches a certain degree, the gas pushes the valve ball 1101 away, the gas enters the second container 9, when the liquid passes through, the liquid pushes the valve ball 1101 upwards, the valve ball 1101 blocks the third flow inlet channel 11000, the liquid cannot enter the second container 9, and the gas passes through the gas firstly because the gas is above the liquid, the gas is discharged firstly, and the liquid cannot enter the second container 9, so that the liquid in the first liquid storage cavity 401 can be ensured.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a closed sealed lubricated supercharging device of assistance, its characterized in that includes a jar body (4), one side of jar body (4) has the pump connecting portion that is used for being connected with the pump, sets up in jar body (4) and has elastic diaphragm assembly (5), and the lower extreme of jar body (4) sets up first container (6), first container (6) set up joint (7), diaphragm assembly (5) divide into two parts with the space in jar body (4), and one part is first stock solution chamber (401) of being connected with the pump connecting portion, and another part is second stock solution chamber (402) of being connected with first container (6).

2. The closed type sealing auxiliary lubrication pressurization device according to claim 1, characterized in that the diaphragm assembly (5) comprises a fixed pressure plate (500), a corrugated pipe (501) and a sealing pressure plate (502) which are sequentially connected in a matching manner, the fixed pressure plate (500) is fixedly connected to the tank body (4), and the corrugated pipe (501) can be stretched.

3. The closed type sealing auxiliary lubrication pressurization device according to claim 2, characterized in that the diaphragm assembly (5) further comprises a limiting rod (503) fixedly connected with the sealing pressure plate (502), and the limiting rod (503) is slidably connected with the fixed pressure plate (500).

4. A closed seal auxiliary lubrication supercharging device according to claim 2, characterized in that the fixed pressure plate (500) divides the tank (4) into two parts, and the bellows (501) and the seal pressure plate (502) are located in the second reservoir (402).

5. A closed sealing auxiliary lubrication supercharging device according to any one of claims 1 to 4, characterized in that the tank (4) is provided with a compensation assembly, the compensation assembly comprises a connecting seat (8) fixedly connected with the tank (4), a second container (9) fixedly connected with the connecting seat (8), and three valves arranged on the connecting seat (8), the three valves are respectively a first valve (10), a second valve (11) and a third valve (12), the connecting seat (8) is provided with a plurality of compensation channels (800) for communicating the valves with the first reservoir (401) of the tank (4), the first valve (10) is a one-way valve which can only allow medium to flow from the tank (4) to the second container (9), the second valve (11) is a one-way valve which can only allow gas to flow from the tank (4) to the second container (9), the third valve (12) is a one-way valve which only allows medium to flow from the second container (9) to the tank (4).

6. The enclosed type sealing auxiliary lubrication supercharging device according to claim 5, wherein the first valve (10) comprises a first valve body (1000), a first valve rod (1001) and a first spring (1002), the first valve body (1000) is provided with a first inflow channel (10000), the first inflow channel (10000) is respectively communicated with the second container (9) and a corresponding compensation channel (800) on the connecting seat (8), the first valve rod (1001) is slidably connected to the first valve body (1000), the first spring (1002) is arranged in the first valve body (1000), the first spring (1002) can press the first valve rod (1001) upwards, the lower end of the first valve rod (1001) is provided with a first valve core (1003), and the first valve core (1003) upwards can block the inlet of the first inflow channel (10000).

7. The closed type sealing auxiliary lubrication supercharging device according to claim 5, wherein the second valve (11) comprises a second valve body (1100) and a valve ball (1101), the second valve body (1100) has a second inlet channel (11000), two ends of the second inlet channel (11000) are respectively communicated with the second container (9) and a corresponding compensation channel (800), a valve cavity (11001) is arranged in the middle of the second inlet channel (11000), the valve ball (1101) is arranged in the valve cavity (11001), and the valve ball (1101) can block two upper connecting ports and a lower connecting port of the valve cavity (11001) and the second inlet channel (11000).

8. The closed type sealing auxiliary lubrication pressurization device according to claim 5, characterized in that the third valve (12) comprises a third valve body (1200), a third valve rod (1201) and a third spring (1202), the lower end of the third valve body (1200) is provided with a third inlet channel (12000), the third inlet channel (12000) is respectively communicated with the second container (9) and a corresponding compensation channel (800) on the connecting seat (8), the third valve rod (1201) is slidably connected with the third valve body (1200), the third spring (1202) is arranged in the third valve body (1200), the third spring (1202) can press the third valve rod (1201) downwards, the lower end of the third valve rod (1201) is provided with a third valve core (1203), and the third valve core (1203) can block the inlet of the third inlet channel (12000) downwards.