CN114607612B - Method for adjusting air flow of water ring vacuum pump - Google Patents
Method for adjusting air flow of water ring vacuum pump Download PDFInfo
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- CN114607612B CN114607612B CN202210299863.8A CN202210299863A CN114607612B CN 114607612 B CN114607612 B CN 114607612B CN 202210299863 A CN202210299863 A CN 202210299863A CN 114607612 B CN114607612 B CN 114607612B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/10—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
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Abstract
A method for adjusting the air flow of a water ring vacuum pump belongs to the technical field of water ring vacuum pumps. The method is characterized in that: install regulating plate (2) on distributing tray (1) of water ring vacuum pump, be provided with installing port (104) on distributing tray (1), regulating plate (2) rotatable install in installing port (104), and seal installing port (104), distributing tray's (1) entry (3) of breathing in set up on regulating plate (2), be provided with damping device between regulating plate (2) and distributing tray (1), be provided with on pump cover (10) with regulating plate (2) just right pump cover operation mouth (1001), rotate regulating plate (2) through pump cover operation mouth (1001), and the direction of rotation of regulating plate (2) is the same or opposite with the direction of rotation of impeller. The method for adjusting the air flow of the water ring vacuum pump can adjust the position of the air suction end angle of the crescent small cavity of the impeller, so that the air suction amount of the water ring vacuum pump can be adjusted in a small range according to the working condition.
Description
Technical Field
A method for adjusting the air flow of a water ring vacuum pump belongs to the technical field of water ring vacuum pumps.
Background
The water ring vacuum pump is a displacement pump, a proper amount of liquid (generally water) is filled in a pump body to serve as a working medium, when an eccentrically-mounted impeller rotates, the liquid is thrown to the periphery under the action of centrifugal force to form a closed circular ring similar to the shape of a pump cavity, and at the moment, a crescent space is formed between a hub of the impeller and the liquid ring. The space is divided into crescent small cavities with the same number as the blades by the blades of the impeller. The small cavity volume is gradually increased in the process of starting the rotation of the blades from 0 degrees at the upper part of the impeller to 180 degrees at the lower part of the impeller. This maximum value of the small chamber volume is determined by the end inspiration angle theta. Under the condition of preventing the air suction cavity from being communicated with the air exhaust cavity, the larger theta is, the larger the impeller rotates for one circle, the larger the volume of sucked air is, namely, the larger the air suction quantity is.
When the water ring vacuum pump lectotype, the air extraction that can appear the demand is big than normal rated air extraction, but the value that increases is not enough to choose for use the circumstances of bigger specification water ring vacuum pump and motor, speed reducer, perhaps the water ring vacuum pump has been installed in user's system, and the user needs the narrow range to improve the condition of water ring vacuum pump air extraction in order to adapt to new user production system parameter, but above-mentioned technical problem can not be solved to current water ring vacuum pump, can only solve the problem through the water ring vacuum pump of changing bigger specification.
The chinese patent application No. 201510137694.8 discloses a variable radial gap water ring vacuum pump, which realizes the problem of changing the relative radial gap by the relative rotation of a disc and a pump body, and further changing the air volume, the shaft power and the efficiency. But it is when adjusting, need unpack apart between pump cover and the pump body to adjust the disc, the tolerance adjustment operation is troublesome, and parts such as frequent dismouting water ring vacuum pump leads to parts such as bearing, mechanical seal very easily to damage, influences water ring vacuum pump's life.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method for adjusting the air flow of the water ring vacuum pump overcomes the defects of the prior art, and can adjust the position of the air suction inlet without disassembling the distribution plate so as to adjust the air suction amount.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for adjusting the air quantity of the water ring vacuum pump is characterized by comprising the following steps of: the water ring vacuum pump comprises a pump cover, an impeller and a distribution plate, wherein an adjusting plate is mounted on the distribution plate, a mounting hole is formed in the distribution plate, the adjusting plate is rotatably mounted in the mounting hole and seals the mounting hole, a rotating shaft of the adjusting plate is overlapped with a rotating shaft of the impeller, a suction inlet of the distribution plate is formed in the adjusting plate, a damping device is arranged between the adjusting plate and the distribution plate, a pump cover operation hole right opposite to the adjusting plate is formed in the pump cover, and a cover plate for sealing the pump cover operation hole is detachably mounted on the pump cover;
the adjusting method comprises the following steps:
step 1) detaching a cover plate on a pump cover;
step 2) rotating the adjusting plate through the pump cover operation opening, wherein the rotating direction of the adjusting plate is the same as or opposite to that of the impeller;
and 3) mounting the cover plate on the outer side of the pump cover, and closing the pump cover operation opening again.
Preferably, the adjusting plate in step 2) rotates in the air suction cavity enclosed by the pump cover and the distribution plate. The adjusting plate rotates in the air suction cavity, so that the condition that the air suction cavity and the exhaust cavity of the water ring vacuum pump are communicated due to the rotation of the adjusting plate, and the performance of the water ring vacuum pump is influenced.
Preferably, the method further comprises rotating the distribution plate about the axis of the impeller in the same or opposite direction as the impeller. Through rotating the plate of distributor, the plate of distributor can drive the regulating plate synchronous rotation, also can realize breathing in the regulation of the position of entry, has increased the control range of the entry of breathing in, and then the control range of increase or reduced water ring vacuum pump air extraction, makes water ring vacuum pump's accommodation wider.
Preferably, the mounting opening is in a fan shape coaxial with the impeller, a guide groove is formed in the inner wall of the mounting opening, and the side portion of the adjusting plate is slidably mounted in the guide groove. The inner wall of the mounting hole is provided with a guide groove, and the side part of the adjusting plate can be arranged in the guide groove in a sliding manner, so that the position of the adjusting plate is more accurate, and the adjusting plate is more stable during adjustment.
Preferably, the inner wall of the mounting opening, which is close to one side of the impeller, protrudes inwards, a support table is formed on the shoulder of the mounting opening, a pressure plate is detachably mounted on one side of the distribution plate, which is far away from the impeller, the pressure plate and the support table are arranged at intervals, and the guide groove is formed between the pressure plate and the support table. The adjusting plate is pressed on the supporting platform through the pressing plate, and the adjusting plate is convenient to disassemble and assemble.
Preferably, the side part of the adjusting plate is provided with a convex guide platform, the guide platform is arranged on one side of the adjusting plate far away from the impeller, and the guide platform is slidably arranged in the guide groove. The guide table of the adjusting plate is arranged in the guide groove, so that the adjusting plate seals the mounting port all the time in the adjusting process, and the performance of the water ring vacuum pump is ensured.
Preferably, the damping device is a flexible pad arranged between the adjusting plate and the distribution plate. The adjusting plate and the distribution plate are matched to compress the flexible pad, so that a damping effect can be achieved, free movement of the adjusting plate is avoided, stable air suction quantity of the water ring vacuum pump is guaranteed, a sealing effect can be achieved, and the phenomenon that leakage occurs between the adjusting plate and the distribution plate to affect the performance of the water ring vacuum pump is avoided.
Preferably, the distributor further comprises a gear, the gear is rotatably arranged on one side, away from the impeller, of the distributor plate, the gear is arranged on the outer side of the adjusting plate, gear teeth meshed with the gear are arranged on the side portion of the adjusting plate, and an operating portion is arranged on the end face of the gear. The gear is driven to rotate by the control part, and then the adjusting plate is driven to rotate by the gear, so that the adjusting plate is convenient to operate.
Preferably, the gear is a cone with the diameter gradually increasing along the direction close to the impeller, and one side of the adjusting plate, on which the gear teeth are arranged, is in an inclined shape matched with the gear.
Preferably, the distribution plate further comprises an auxiliary exhaust valve, the distribution plate is provided with an auxiliary exhaust hole, the auxiliary exhaust hole and an exhaust outlet of the distribution plate are arranged on the same side, and the exhaust outlet and the auxiliary exhaust hole are sequentially arranged along the rotation direction of the impeller. The auxiliary exhaust valve can be opened when the pressure reaches the designated pressure, so that the problem that the air pumping quantity of the water ring vacuum pump is influenced due to the fact that the exhaust is too fast because the pressure in the closed space surrounded by the impeller and the distribution plate is too large and the exhausted gas part flows back to the closed space again is solved.
Compared with the prior art, the invention has the beneficial effects that:
the adjusting plate of the water ring vacuum pump of the method for adjusting the air flow of the water ring vacuum pump seals the mounting opening of the distribution plate, the air suction inlet of the distribution plate is arranged on the adjusting plate, the rotating shaft of the adjusting plate is superposed with the rotating shaft of the impeller, so that the adjusting plate rotates relative to the distribution plate, the position of the air suction inlet can be adjusted, and further the position of the air suction final angle of the crescent small cavity of the impeller can be adjusted, so that the air suction amount of the crescent small cavity can be adjusted in a small range according to the working condition, the adaptation range of the water ring vacuum pump is enlarged, the water ring vacuum pump with larger specification or smaller specification does not need to be replaced to adapt to the working condition, the air suction inlet can be adjusted only by detaching the cover plate on the pump cover during adjustment, the adjustment is convenient, the adjustment of the air suction amount can be realized without detaching the pump cover and the distribution plate, and the adjustment is convenient and simple, the water ring vacuum pump does not need to be dismounted again, a large amount of time can be saved, and damage to parts such as a bearing and a mechanical seal caused by frequent dismounting of the water ring vacuum pump is avoided.
Drawings
Fig. 1 is a perspective view of a distribution plate of a water ring vacuum pump.
Fig. 2 is a front cross-sectional schematic view of a distribution tray.
Fig. 3 is a partially enlarged view of a portion a in fig. 2.
Fig. 4 is a perspective view of a dispensing tray.
Fig. 5 is a perspective view of the adjusting block.
Fig. 6 is a schematic front view of a pump cap.
Fig. 7 is a right side cross-sectional schematic view of a pump cap.
Fig. 8 is a perspective view schematically showing an adjustment mechanism in embodiment 2.
FIG. 9 is a front cross-sectional schematic view of an auxiliary exhaust valve.
Fig. 10 is a partially enlarged view of fig. 8 at B.
Fig. 11 is a partially enlarged view of fig. 8 at C.
In the figure: 1. dispensing disc 101, mounting lug 102, positioning lug 103, shaft hole 104, mounting port 105, support table 106, auxiliary exhaust hole 2, adjustment plate 201, guide table 3, suction inlet 4, gear mounting portion 5, gear 6, mounting shaft 7, outer pressure plate 8, inner pressure plate 9, flexible pad 10, pump cover 1001, pump cover operation port 11, cover plate 12, passive rotary table 1201, passive connection hole 13, active rotary table 1301, active connection hole 14, adjustment shaft 15, connecting rod 16, return spring 17, valve body 1701, balance passage 1702, second air outlet 1703, first air outlet 1704, communication passage 1705, valve cavity 1706, first sealing portion 18, valve core 1801, air inlet 1802, communication hole 1803, guide hole 19, sealing pin 1901, second sealing portion 1902, guide portion 1903, Push portion 20, spool seal spring 21, seal pin seal spring 22, shift lever 2201, shift channel.
Detailed Description
The present invention is further described with reference to the following detailed description, however, it should be understood by those skilled in the art that the detailed description given herein with respect to the accompanying drawings is for better explanation and that the present invention is not necessarily limited to the specific embodiments, but rather, for equivalent alternatives or common approaches, may be omitted from the detailed description, while still remaining within the scope of the present application.
Fig. 1 to 7 are preferred embodiments of the present invention, and the present invention will be further described with reference to fig. 1 to 7.
The water ring vacuum pump includes pump cover 10, impeller and plate of distributor 1, install regulating plate 2 on the plate of distributor 1, be provided with installing port 104 on the plate of distributor 1, the rotatable installation in installing port 104 of regulating plate 2, and seal installing port 104, the pivot of regulating plate 2 coincides with the pivot of impeller, the inlet 3 that breathes in of plate of distributor 1 sets up on regulating plate 2, be provided with damping device between regulating plate 2 and the plate of distributor 1, be provided with on the pump cover 10 with regulating plate 2 just right pump cover operation mouth 1001, detachable installs the apron 11 with pump cover operation mouth 1001 confined on the pump cover 10. The adjusting plate 2 seals the mounting opening 104 of the distribution plate 1, the air suction inlet 3 of the distribution plate 1 is arranged on the adjusting plate 2, the rotating shaft of the adjusting plate 2 is overlapped with the rotating shaft of the impeller, so that the adjusting plate 2 rotates relative to the distribution plate 1, the position of the air suction inlet 3 can be adjusted, the position of the air suction final angle of the crescent small cavity of the impeller can be adjusted, the air suction amount of the crescent small cavity can be adjusted, the air suction amount of the water ring vacuum pump can be adjusted in a small range according to the working condition, the adaptation range of the water ring vacuum pump is enlarged, the water ring vacuum pump with larger specification or smaller specification does not need to be replaced to adapt to the working condition, the air suction inlet 3 can be adjusted only by detaching the cover plate 11 on the pump cover 10 during adjustment, the adjustment is convenient, the adjustment of the air suction amount can be realized without detaching the pump cover 10 and the distribution plate 1, the adjustment is convenient and simple, and the water ring vacuum pump does not need to be detached again, can save a large amount of time, avoided simultaneously frequently dismouting water ring vacuum pump to lead to parts such as bearing, mechanical seal to damage.
Example 1:
as shown in FIGS. 1 to 3: one side of the distribution disc 1 is provided with an air suction inlet 3, the other side of the distribution disc is provided with an exhaust outlet (not shown in the figure), the distribution disc 1 is arranged between the pump cover 10 and the impeller, the distribution disc 1 and the pump cover 1 surround to form an air suction cavity and an exhaust cavity, the air suction cavity and the air suction inlet 3 are arranged on the same side of the pump cover 10, and the exhaust cavity and the exhaust outlet are arranged on the same side of the pump cover 10. The air suction inlet 3 is communicated with the air inlet cavity, and the air exhaust outlet is communicated with the air exhaust cavity.
The distribution plate 1 is disc-shaped, the middle part of the distribution plate 1 is provided with a shaft hole 103, and the axis of the shaft hole 103 is arranged on the upper side of the axis of the distribution plate 1.
The distribution plate 1 is provided with a mounting opening 104 at one side close to the suction cavity, and the mounting opening 104 is in a fan shape coaxial with the shaft hole 103. The inner wall of the mounting opening 104 on the side close to the impeller projects inward, and a support base 105 is formed at the shoulder of the mounting opening 104, the support base 105 being disposed around the inner wall of the mounting opening 104.
The adjusting plate 2 is in a fan shape and is coaxial with the shaft hole 103, a guide table 201 is arranged around the side portion of the adjusting plate 2, and the guide table 201 is arranged on one side, far away from the impeller, of the adjusting plate 2.
The water ring vacuum pump further comprises a pressing plate, wherein the pressing plate comprises an outer pressing plate 7 and an inner pressing plate 8, the outer pressing plate 7 and the inner pressing plate 8 are respectively arranged on two sides of the mounting opening 104, the inner pressing plate 8 is arranged on one side, close to the shaft hole 103, of the mounting opening 104, and the outer pressing plate 7 is arranged on one side, far away from the shaft hole 103, of the mounting opening 104. The outer pressing plate 7 and the inner pressing plate 8 are both arc-shaped and matched with the mounting opening 104, and the inner pressing plate 8 and the outer pressing plate 7 are both arranged on one side of the distribution disc 1 far away from the impeller. The inner side of the inner pressure plate 8 is detachably connected with the distribution plate 1, the other side of the inner pressure plate extends to the upper side of the support platform 105 on the corresponding side, the inner pressure plate 8 and the support platform 105 on the corresponding side are arranged at intervals, and a guide groove is formed between the inner pressure plate 8 and the support platform 105 on the corresponding side. The outer side of the outer pressing plate 7 is detachably connected with the distribution plate 1 through bolts, the inner side of the outer pressing plate extends to the upper side of the supporting platform 105 on the corresponding side, the outer pressing plate 7 and the supporting platform 105 on the corresponding side are arranged at intervals, and a guide groove is formed between the outer pressing plate 7 and the supporting platform 105 on the corresponding side.
The adjusting plate 2 is slidably installed in the installation opening 104, the guide platforms 201 at both sides of the adjusting plate 2 are respectively arranged in the guide grooves at the corresponding sides, and the guide platforms 201 of the adjusting plate 2 close the installation opening 104. The two sides of the adjusting plate 2 are respectively flush with the two sides of the distribution plate 1, so that the work of the water ring vacuum pump is prevented from being hindered.
In this embodiment, damping device is flexible pad 9, flexible pad 9 is installed on regulating plate 2, flexible pad 9 encircles the setting of regulating plate 2, flexible pad 9 is located between direction platform 201 and the brace table 105, regulating plate 2 cooperatees with brace table 105 and compresses tightly flexible pad 9, can enough guarantee that the regulating plate 2 is stable in the back position of adjusting, and then guarantee that the air exhaust of water ring vacuum pump is stable, can play sealed effect again between regulating plate 2 and the dish of distributor 1, avoid taking place to leak between dish of distributor 1 and the regulating plate 2 and influence the performance of water ring vacuum pump.
This water ring vacuum pump still includes gear 5 and installation axle 6, and the rotatable and regulating plate 2 that links to each other of one end of installation axle 6, the other end are provided with the portion of controlling, and the rotatable installation in middle part of gear 5 is on installation axle 6 to along with installation axle 6 synchronous rotation, the outside of regulating plate 2 is provided with the teeth of a cogwheel with gear 5 engaged with, can rotate gear 5 through the portion of controlling, can realize regulating plate 2's regulation, convenient operation.
The relationship between the number of turns of the gear 5 and the angle of the adjusting plate 2 is as follows:
wherein the content of the first and second substances,
the angle of the rotation of the adjusting plate 2 is shown, N is the number of turns of the rotation of the gear 5,
is the radius of the gear wheel 5 and,
the distance between the meshing point of the adjusting plate 2 and the gear 5 and the axis of the impeller is obtained.
In this embodiment, the gear 5 is a cone with a diameter gradually decreasing along a direction away from the impeller, and the outer side of the adjusting plate 2 is inclined to match with the gear 5, so that the side of the adjusting plate 2 presses the side of the gear 5, and the gear 5 is prevented from moving axially during adjustment and separating from the gear teeth of the adjusting plate 2.
The side of the distribution disk 1 away from the impeller is provided with a concave gear mounting part 4, and a gear 5 is arranged in the gear mounting part 4. The inner pressing plate 8 is provided with a gear pressing part which is arranged on the upper side of the gear 5, so that the gear 5 is further prevented from moving axially.
As shown in fig. 4: the gear mounting portion 4 of the distribution plate 1 communicates with the mounting opening 104 to facilitate engagement of the gear 5 with the adjustment plate 2.
The bottom of the distribution plate 1 is provided with an installation ear block 101, and the upper two sides of the distribution plate 1 are provided with positioning ear blocks 102. When the distribution plate 1 is installed, the installation lug blocks 101 are installed on the water ring vacuum pump through pin shafts, and any one positioning lug block 102 is installed on the water ring vacuum pump through a pin shaft, so that the distribution plate 1 is accurately positioned. If the distribution disc 1 needs to be rotated, only the positioning lug block 102 needs to be loosened, and the other positioning lug block 102 is installed on the water ring vacuum pump through a pin shaft, so that the position of the air suction inlet 3 can be adjusted through the adjusting plate 2, and the position of the air suction inlet 3 can also be adjusted through the manner of rotating the distribution disc 1.
As shown in fig. 5: the adjusting plate 2 is a fan-shaped plate, the air suction inlet 3 is arranged on the adjusting plate 2, and the guide table 201 is arranged around the adjusting plate 2, so that the mounting opening 104 can be closed.
As shown in FIGS. 6 to 7: be provided with pump cover operation mouth 1001 on the pump cover 10, pump cover operation mouth 1001 is just to setting up with regulating plate 2 or gear 5, conveniently adjusts regulating plate 2 through pump cover operation mouth 1001, need not dismantle pump cover 10. The cover plate 11 is detachably mounted on the cover plate 11 through bolts, and the cover plate 11 closes the pump cover operation opening 1001.
A method for adjusting the air volume of a water ring vacuum pump comprises the following steps:
the adjusting method comprises the following steps:
step 1) the cover plate 11 on the pump cover 10 is detached.
The bolts on the cover plate 11 are loosened and the cover plate 11 is removed.
And step 2) rotating the adjusting plate 2 through the pump cover operation opening 1001, wherein the rotating direction of the adjusting plate 2 is the same as or opposite to that of the impeller.
In the initial state, the adjusting plate 2 is located at the middle of the mounting opening 104 or at the top dead center of the stroke. Through the rotating gear 5, so that the adjusting plate 2 rotates, the rotating direction of the adjusting plate 2 is the same as that of the impeller, and the air suction inlet 3 rotates towards the front side of the rotating direction of the impeller at the moment, so that the air suction end angle of the crescent small cavity is increased, and the air suction amount is increased. And the pump cover 10 and the distribution disc 1 do not need to be loosened during adjustment at the moment, so that the air suction quantity is convenient to adjust and operate. When the rotation direction of the adjusting plate 2 is opposite to the rotation direction of the impeller, the air suction amount is reduced.
At this moment, if the increase of the air suction amount is not enough to meet the working condition, the pump cover 10 can be loosened, the positioning lug 102 connected with the water ring vacuum pump is replaced at the same time, the distribution disc 1 is made to rotate, the rotating direction is the same as that of the impeller, the adjustment of the position of the air suction inlet 3 is further realized, the adjustment range of the air suction inlet 3 is enlarged, the adjustment range of the air suction amount is further enlarged, and the application range of the water ring vacuum pump is wider. If the direction of rotation of the distributor plate 1 is opposite to the direction of rotation of the impeller, the suction is reduced.
And step 3) installing the cover plate 11 on the outer side of the pump cover 10 and closing the pump cover operation opening 1001 again.
After the adjustment is completed, the cover plate 11 is attached to the pump cover 10 again by bolts, and the pump cover operation port 1001 is closed again.
Example 2
As shown in fig. 8: example 2 differs from example 1 in that: the mounting shaft 6 is connected with an adjusting mechanism. The adjusting mechanism comprises a driven rotary table 12, an active rotary table 13, a connecting rod 15 and an adjusting shaft 14, the driven rotary table 12 is coaxially arranged on the mounting shaft 6 and drives the mounting shaft 6 to synchronously rotate, one end of the adjusting shaft 14 is rotatably arranged on the pump cover 11, the other end of the adjusting shaft 14 is coaxially arranged with the active rotary table 13, and the active rotary table 13 synchronously rotates along with the adjusting shaft 14. One end of the adjusting shaft 14, which is installed on the pump cover 11, is flush with the pump cover 11, and a blind hole in a regular hexagon shape is installed on the end face of one end of the adjusting shaft 14, which is installed on the pump cover 11, so that the adjusting shaft 14 can be conveniently rotated, the rotation of the adjusting shaft 14 caused by mistaken touching of the adjusting shaft 14 can be avoided, and the adjusting shaft 14 is perpendicular to the installation shaft 6. Be provided with initiative connecting hole 1301 on the initiative carousel 13, initiative connecting hole 1301 encircles the axis interval equipartition of initiative carousel 13 and has threely, be provided with passive connecting hole 1201 on the passive carousel 12, passive connecting hole 1201 encircles passive carousel 12 interval equipartition and has threely, each initiative connecting hole 1301 all links to each other with the passive connecting hole 1201 that corresponds through connecting rod 15, connecting rod 15 is "L" shape, the one end slidable of connecting rod 15 stretches into in the passive connecting hole 1201, and connecting rod 15 and passive connecting hole 1201 can the relative slip, the other end slidable of connecting rod 15 stretches into in the initiative connecting hole 1301, and connecting rod 15 and initiative connecting hole 1301 can the relative slip. The adjusting shaft 14 is rotated through the hexagon socket wrench, the driving rotary disc 13 synchronously rotates along with the adjusting shaft 14, the driving rotary disc 13 drives the driven rotary disc 12 to synchronously rotate through the connecting rod 15, and then the mounting shaft 6 is driven to rotate, so that the gear 5 rotates, and the adjusting plate 2 is adjusted. The adjusting mechanism can eliminate assembly errors, and the problem that assembly cannot be carried out due to machining errors is avoided.
As shown in FIGS. 9-11: the distribution plate 1 is provided with auxiliary exhaust holes 106, the auxiliary exhaust holes 106 and the exhaust outlets are arranged on the same side of the distribution plate 1, the auxiliary exhaust holes 106 are communicated with the exhaust cavity, the auxiliary exhaust holes 106 are arranged side by side along the direction close to the exhaust outlets, and each auxiliary exhaust hole 106 is connected with an auxiliary exhaust valve.
The auxiliary exhaust valve comprises a first check valve, a second check valve and a switching device, wherein the first check valve and the second check valve are both installed on the distribution plate 1, the air inlet of the first check valve and the air inlet of the second check valve are both in sealing connection with the corresponding auxiliary exhaust holes 106, and the air outlet of the first check valve and the air outlet of the second check valve are both communicated with the exhaust cavity. The switching device is connected to the first check valve and locks the first check valve, and the switching device is also connected to the second check valve and unlocks the first check valve when the second check valve is opened.
The first check valve comprises a valve body 17, a valve core 18 and a valve core sealing spring 20, wherein the valve body 17 is a cylinder with a closed lower end, a valve cavity 1705 is formed in the valve body 17, the upper part of the valve body 17 extends into the auxiliary exhaust hole 106 and is in threaded connection with the distribution disc 1, and a sealing ring is arranged between the upper end of the valve body 17 and the inner wall of the auxiliary exhaust hole 106. The top of the valve cavity 1705 is open, the top of the valve cavity 1705 is provided with a first sealing portion 1706, and the first sealing portion 1706 is a cone with a diameter gradually increasing along the medium flow direction. The valve core 18 is slidably arranged in the valve cavity 1705, the diameter of the valve core 18 is equal to the inner diameter of the valve cavity 1705, and the valve core 18 and the inner wall of the valve cavity 1705 are arranged in a sealing mode. The top of the valve core 18 is provided with a valve core sealing portion, the diameter of the valve core sealing portion is smaller than that of the valve core 18, the valve core sealing portion is a cone with the diameter gradually increasing along the medium flow direction, and the top of the valve core sealing portion is supported on the inner wall of the first sealing portion 1706 so as to seal the first sealing portion 1706. The valve core sealing spring 20 is arranged in the valve cavity 1705, the valve core sealing spring 20 is arranged on the lower side of the valve core 18, the valve core sealing spring 20 is in a compressed state, the bottom of the valve core sealing spring 20 is supported at the bottom of the valve cavity 1705, the top of the valve core sealing spring 20 is supported at the bottom of the valve core 18, and the valve core 18 is pushed to seal the top of the valve body 17. The valve body 17 is provided with a first air outlet 1703, the first air outlet 1703 is arranged along the radial direction of the valve body 1, one end of the first air outlet 1701 is communicated with the outside of the valve body 17, the other end of the first air outlet 1701 is communicated with the valve cavity 1705, and the first air outlet 1701 is arranged between the valve core 18 and the first sealing portion 1706. The first outlet 1701 is provided in plural at intervals around the valve body 17.
The second check valve comprises a seal pin 19, a seal pin seal spring 21 and a medium flow channel arranged on the valve core 18, wherein the valve core 18 is provided with an air inlet 1801 and a communication hole 1802, the air inlet 1801 is arranged along the axial direction of the valve core 18, the air inlet 1801 is a blind hole arranged at the top of the valve core 18, and the top of the air inlet 1801 is communicated with the auxiliary exhaust hole 106. The communication hole 1802 is a blind hole arranged along the radial direction of the valve element 18, and the lower end of the air inlet 1801 is communicated with the middle of the communication hole 1802 to form a medium flow passage. The seal pin 19 is coaxially arranged in the communication hole 1802, the seal pin 19 and the inner wall of the communication hole 1802 are arranged in a relative sliding mode, the seal pin 19 and the communication hole 1802 are arranged in a sealing mode, the valve body 17 is provided with a second air outlet 1702, the second air outlet 1702 is arranged on the valve body 17, one end of the second air outlet 1702 is communicated with the outside of the valve body 17, and the other end of the second air outlet 1702 is communicated with the open end of the communication hole 1802. A seal pin seal spring 21 is disposed in the communication hole 1802, the seal pin seal spring 21 is disposed on the left side of the seal pin 19, the seal pin seal spring 21 is in a compressed state, one end of the seal pin seal spring is supported on the bottom of the communication hole 1802, the other end is supported on the seal pin 19, and pushes the seal pin 19 to move to just below the intake port 1801 and close the intake port 1801 and the communication hole 1802.
The communication hole 1802 is a stepped hole with the diameter of the open end smaller than that of the other end, the diameter of one end of the seal pin 19 close to the seal part is smaller than that of the other end, a relief part 1901 is formed at the small end of the seal pin 19, a guide part 1902 is formed at the large end of the seal pin 19, the guide part 1902 and the communication hole 1802 are in relative sliding and sealing connection, a second seal part is arranged at one end of the relief part 1901 close to the open end of the communication hole 1802, the diameter of the second seal part is gradually reduced along the medium flowing direction, the end of the second seal part extends into the small end of the communication hole 1802, and the side of the second seal part presses the shoulder of the communication hole 1802, so that the communication hole 1802 is sealed. When the second sealing portion seals the communication hole 1802, the relief portion 1901 is disposed to face the air inlet 1801, and when the pressure in the air inlet 1801 increases, the sealing pin 19 can be pushed to move leftward and the communication hole 1802 can be opened.
A communicating channel 1704 is arranged on the valve body 17, the upper end of the communicating channel 1704 is communicated with the outside of the valve body 17 through a second air outlet 1702, a balancing channel 1701 is also arranged on the valve body 17, the upper end of the balancing channel 1701 is communicated with the auxiliary exhaust hole 106, the air outlet of the switching device is communicated with a valve cavity 1705 on the lower side of the valve core 18, the air inlet of the switching device is alternately communicated with the lower end of the communicating channel 1704 and the lower end of the balancing channel 1701, when the second check valve is closed, the switching device communicates the balancing channel 1701 with the bottom of the valve cavity 1705, and at the moment, the pressures on the upper side and the lower side of the valve core 18 are equal, so that the valve core 18 can be prevented from being opened; when the second check valve is opened, the switching means communicates the communication passage 1704 with the bottom of the valve chamber 1705, and at this time, it is possible to avoid the air pressure in the valve chamber 1701 from hindering the downward movement of the spool 18.
The switching device comprises a switching rod 22 and a return spring 16, a groove is arranged at the bottom of the sealing pin 19, the bottom of the groove is a pushing part 1903 which is inclined downwards gradually along the direction close to the second air outlet 1702, a guide hole 1803 is arranged at the bottom of the valve core 18, the lower end of the guide hole 1803 is communicated with the valve cavity 1705, the upper end of the guide hole 1803 is communicated with the communicating hole 1802, and the guide hole 1803 is arranged opposite to the pushing part 1903. The bottom of the valve body 17 is also provided with a blind mounting hole, and the blind mounting hole is opposite to the guide hole 1803. The lower end of a balance channel 1701 is arranged on the upper side of the lower end of a communication channel 1704, the lower end of the balance channel 1701 and the lower end of the communication channel 1704 are communicated with a mounting blind hole, the diameter of the upper portion of a conversion rod 22 is smaller than that of the lower portion of the conversion rod 22, the upper end of the conversion rod 22 penetrates through a guide hole 1803 in a sliding mode and then is supported on a pushing portion 1903, the lower portion of the conversion rod 22 slidably extends into the mounting blind hole, the lower portion of the conversion rod 22 and the mounting blind hole are arranged in a sealing mode, a return spring 16 is arranged in the mounting blind hole, the return spring 16 is located on the lower side of the conversion rod 22, the return spring 16 is in a compression state, the lower end of the return spring 16 is supported at the bottom of the mounting blind hole, the upper end of the return spring 16 supports at the bottom of the conversion rod 22, and the return spring 16 pushes the conversion rod 22 to press the pushing portion 1903. The switching lever 22 is provided with a switching passage 2201, the upper end of the switching passage 2201 is communicated with the valve cavity 1705, the lower end is provided with a communicating part, two ends of the communicating part are respectively arranged at two sides of the switching lever 22, and the lower end of the balance passage 1701 and the lower end of the communicating passage 1704 are respectively arranged at two lower sides of the switching lever 22. The bottom of the blind mounting hole may be provided with a through hole communicating with the outside, and the diameter of the through hole is much smaller than that of the blind mounting hole, so as to prevent the air pressure from obstructing the movement of the transfer lever 22. The top of the transfer lever 22 may be connected to the mounting pin and seal pin 19 by a slide slot.
When the auxiliary exhaust valve works, the first check valve and the second check valve are both closed, the auxiliary exhaust hole 106 is closed, the upper side of the distribution plate 1 is communicated with the valve cavity 1705 at the lower side of the valve core 18 through the balance channel 1701 at the moment, the pressure at the upper side and the lower side of the valve core 18 is equal, and the valve core 18 cannot be opened under the action of the valve core sealing spring 20 at the moment. At this time, if the air pressure on the upper side of the distribution plate 1 increases, the pressure pushes the seal pin 19 to move leftward through the air inlet 1801 and makes the air inlet 1801 communicate with the right side of the communication hole 1802, and the medium on the upper side of the distribution plate 1 sequentially passes through the air inlet 1801, the right side of the communication hole 1802 and the second air outlet 1702 to enter the lower side of the distribution plate 1, i.e., the air discharge chamber.
When the pressure on the upper side of the distribution plate 1 is too high and the exhaust speed of the second check valve is insufficient, the sealing plug 19 moves to the left stroke end, and the pushing part 1903 pushes the switching rod 22 to move downward, so that the balance passage 1701 is disconnected from the valve cavity 1705, and the communication passage 1704 is communicated with the valve cavity 1705, at this time, since the pressure on the upper side of the valve core 18 is much higher than the pressure on the lower side, the valve core 18 moves downward, the valve core 18 opens the first sealing part 1706, and at this time, the gas is rapidly exhausted through the first gas outlet 1703. Since the air pressure in the valve chamber 1705 on the lower side of the valve core 18 is greater than the air pressure in the exhaust chamber, the seal pin 19 applies a small urging force to the switching lever 22 to move it downward.
The auxiliary exhaust valve can avoid the problem that the pumping rate of the water ring vacuum pump is influenced due to the fact that the pressure of the closed space is too small as the exhaust speed is too high and the pressure of the closed space is increased due to insufficient exhaust.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (10)
1. A method for adjusting the air volume of a water ring vacuum pump is characterized in that: the water ring vacuum pump comprises a pump cover (10), an impeller and a distribution plate (1), wherein an adjusting plate (2) is installed on the distribution plate (1), a mounting hole (104) is formed in the distribution plate (1), the adjusting plate (2) is rotatably installed in the mounting hole (104) and seals the mounting hole (104), a rotating shaft of the adjusting plate (2) is overlapped with a rotating shaft of the impeller, a suction inlet (3) of the distribution plate (1) is formed in the adjusting plate (2), a damping device is arranged between the adjusting plate (2) and the distribution plate (1), an operation hole (1001) which is right opposite to the adjusting plate (2) is formed in the pump cover (10), and a cover plate (11) which seals the operation hole (1001) of the pump cover is detachably installed on the pump cover (10);
the adjusting method comprises the following steps:
step 1), a cover plate (11) on a pump cover (10) is detached;
step 2), the adjusting plate (2) is rotated through the pump cover operation opening (1001), and the rotating direction of the adjusting plate (2) is the same as or opposite to that of the impeller;
and 3) mounting the cover plate (11) on the outer side of the pump cover (10), and closing the pump cover operation opening (1001) again.
2. The method for adjusting the gas quantity of the water ring vacuum pump according to claim 1, wherein the method comprises the following steps: the adjusting plate (2) in the step 2) rotates in an air suction cavity enclosed by the pump cover (10) and the distribution plate (1).
3. The method for adjusting the gas quantity of the water ring vacuum pump according to claim 1, wherein the method comprises the following steps: the method further comprises rotating the distribution plate (1) about the axis of the impeller, and the direction of rotation of the distribution plate (1) is the same as or opposite to the direction of rotation of the impeller.
4. The method for adjusting the air flow of the water ring vacuum pump as recited in claim 1, wherein: the mounting port (104) is in a fan shape coaxial with the impeller, a guide groove is formed in the inner wall of the mounting port (104), and the side portion of the adjusting plate (2) is slidably mounted in the guide groove.
5. The method for adjusting the air volume of the water ring vacuum pump according to claim 4, wherein the air volume of the water ring vacuum pump is adjusted by the following steps: the inner wall of the mounting opening (104) close to one side of the impeller protrudes inwards, a support platform (105) is formed on the shoulder of the mounting opening (104), a pressure plate is detachably mounted on one side, away from the impeller, of the distribution plate (1), the pressure plate and the support platform (105) are arranged at intervals, and the guide groove is formed between the pressure plate and the support platform (105).
6. The method for adjusting the gas volume of the water ring vacuum pump according to claim 4 or 5, wherein the method comprises the following steps: the lateral part of regulating plate (2) is provided with evagination guide platform (201), and guide platform (201) set up in regulating plate (2) keep away from the one side of impeller, and guide platform (201) slidable sets up in the guide way.
7. The method for adjusting the gas quantity of the water ring vacuum pump according to claim 1, wherein the method comprises the following steps: the damping device is a flexible cushion (9) arranged between the adjusting plate (2) and the distribution plate (1).
8. The method for adjusting the gas quantity of the water ring vacuum pump according to claim 1, wherein the method comprises the following steps: the distributor is characterized by further comprising a gear (5), the gear (5) is rotatably arranged on one side, far away from the impeller, of the distribution plate (1), the gear (5) is arranged on the outer side of the adjusting plate (2), gear teeth meshed with the gear (5) are arranged on the side portion of the adjusting plate (2), and an operation portion is arranged on the end face of the gear (5).
9. The method for adjusting the air flow of a water ring vacuum pump as recited in claim 8, wherein: the gear (5) is a cone with the diameter gradually increasing along the direction close to the impeller, and one side of the adjusting plate (2) provided with the gear teeth is inclined to be matched with the gear (5).
10. The method for adjusting the gas amount of the water ring vacuum pump as claimed in claim 8, wherein: the distribution plate is characterized by further comprising an auxiliary exhaust valve, an auxiliary exhaust hole (106) is formed in the distribution plate (1), the auxiliary exhaust hole (106) and an exhaust outlet of the distribution plate (1) are arranged on the same side, and the exhaust outlet and the auxiliary exhaust hole (106) are sequentially arranged in the rotation direction of the impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210299863.8A CN114607612B (en) | 2022-03-25 | 2022-03-25 | Method for adjusting air flow of water ring vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210299863.8A CN114607612B (en) | 2022-03-25 | 2022-03-25 | Method for adjusting air flow of water ring vacuum pump |
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| Publication Number | Publication Date |
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| CN114607612A CN114607612A (en) | 2022-06-10 |
| CN114607612B true CN114607612B (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210299863.8A Active CN114607612B (en) | 2022-03-25 | 2022-03-25 | Method for adjusting air flow of water ring vacuum pump |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115726962B (en) * | 2022-12-15 | 2023-05-30 | 淄博水环真空泵厂有限公司 | Water ring pump vacuumizing system with adjustable air quantity |
| CN117247137B (en) * | 2023-01-10 | 2024-04-16 | 重庆大学 | Aeration system for in-situ ecological elimination of endogenous pollution of water body |
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| GB1185754A (en) * | 1967-03-16 | 1970-03-25 | Roberto Abbioneta | Multistage, Liquid-Ring Rotary Compressor |
| US4172694A (en) * | 1977-11-07 | 1979-10-30 | The Nash Engineering Company | Long liquid ring pumps and compressors |
| CN203570698U (en) * | 2013-11-22 | 2014-04-30 | 邵阳市三良泵业有限公司 | Single-stage single-suction vortex pump |
| CN107630824A (en) * | 2017-11-14 | 2018-01-26 | 如皋千骏工具有限公司 | A kind of Miniature water-pumping pump |
| CN213144741U (en) * | 2020-09-24 | 2021-05-07 | 淄博双环真空泵厂 | Adjusting device of distribution plate of two-stage water ring vacuum pump |
| CN213450998U (en) * | 2020-08-15 | 2021-06-15 | 优尼斯工业服务高邮有限公司 | Turbine pump case with impeller clearance convenient to adjust |
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2022
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1185754A (en) * | 1967-03-16 | 1970-03-25 | Roberto Abbioneta | Multistage, Liquid-Ring Rotary Compressor |
| US4172694A (en) * | 1977-11-07 | 1979-10-30 | The Nash Engineering Company | Long liquid ring pumps and compressors |
| CN203570698U (en) * | 2013-11-22 | 2014-04-30 | 邵阳市三良泵业有限公司 | Single-stage single-suction vortex pump |
| CN107630824A (en) * | 2017-11-14 | 2018-01-26 | 如皋千骏工具有限公司 | A kind of Miniature water-pumping pump |
| CN213450998U (en) * | 2020-08-15 | 2021-06-15 | 优尼斯工业服务高邮有限公司 | Turbine pump case with impeller clearance convenient to adjust |
| CN213144741U (en) * | 2020-09-24 | 2021-05-07 | 淄博双环真空泵厂 | Adjusting device of distribution plate of two-stage water ring vacuum pump |
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|---|---|
| CN114607612A (en) | 2022-06-10 |
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