CN111486137A - Jet pump nozzle with open structure and vibration reduction function - Google Patents
Jet pump nozzle with open structure and vibration reduction function Download PDFInfo
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- CN111486137A CN111486137A CN202010183009.6A CN202010183009A CN111486137A CN 111486137 A CN111486137 A CN 111486137A CN 202010183009 A CN202010183009 A CN 202010183009A CN 111486137 A CN111486137 A CN 111486137A
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- jet pump
- pump nozzle
- jet
- spray pipe
- liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
- F04F5/04—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
- F04F5/461—Adjustable nozzles
Abstract
The invention relates to an open structure jet pump nozzle with a vibration reduction function, which comprises a spray pipe propelling device, a jet pump nozzle and a vibration reduction device, wherein the output end of the spray pipe propelling device is connected with one input end of the jet pump nozzle, the other input end of the jet pump nozzle is connected with a powder solid input device, and the vibration reduction device is arranged outside the outlet position of the jet pump nozzle. The invention is a standard test type mechanical device which can be directly used for determining the structural parameters of the economical jet pump nozzle; improving the coaxiality of a jet pump nozzle system device; reducing the generation of stress concentration of the system device; the sensitivity of the jet pump nozzle system device is improved, so that the jet pump nozzle system device is easy to operate; the disassembly and the assembly are quick and convenient; mass production can be realized, and the operation stability is good; along with the improvement of the coaxiality of the jet pump nozzle system device, the radial vibration of the jet pump nozzle system device is also reduced; the device jamming phenomenon in the operation process can not be generated; is favorable for dust prevention and explosion prevention.
Description
Technical Field
The invention belongs to the field of chemical industry, and relates to a jet pump, in particular to a jet pump nozzle with an open structure and a vibration reduction function.
Background
Jet pumps are important unit operations in chemical industry, and are fluid machinery and mixed conveying recoil equipment which transfer energy and mass by utilizing the strong shearing and severe turbulent diffusion effects between high-speed jet and sucked fluid. The jet pump has the characteristics of simple structure, stable process, convenient installation, strong process adaptability, low production cost and the like, so that the jet pump has wider and wider application range, and can replace water ring type, rotary vane type and reciprocating vacuum pumps under certain vacuum conditions. The patent describes a solid-liquid mixing jet pump which has dual functions of solid-liquid mixing and conveying, and the most remarkable characteristic is the conveying of solid powder, such as corn starch and the like. High efficiency is obtained if a jet pump is used to deliver soluble salts with relatively stable physical and chemical properties, such as sodium sulfate, sodium carbonate, sodium chloride, etc. The high-efficiency jet pump system has wide application prospect, and can be widely applied to solid-liquid mixed conveying in the fields of petroleum, chemical industry, medicine, food and the like.
The research and application of jet pumps has been long-lived, and the phenomenon of mixing of jets was discovered earlier than in the 16 th century. With the development of fluid mechanics and aerodynamic theory and applications, the jet technology has also improved greatly. Jet pumps, as a general-purpose device that can produce great economic benefits, have shown an increasingly important role in human economic life. The jet pump nozzle structure is used as a basic and simple physical conveying and mixing method for many years, does not consume medicament, does not have secondary pollution, has low operation and maintenance cost, and is always a hot point of research of scholars at home and abroad, so that more efficient and energy-saving jet pump nozzles are promoted to be invented. These design results have been applied in the fields of petroleum and chemical industry in developed countries. Developed countries now acquire a lot of data through a lot of experiments and obtain many patents, which bring great economic benefits to them. However, the design of the jet pump must take into account the expected efficiency mechanism, which is not sufficient in the current research; the numerous factors restricting the jet flow efficiency and the mechanism of jet flow jet vacuum formation are not deeply understood, and the conditions for forming the optimal efficiency point are not mastered, so that a device with higher efficiency and energy conservation is difficult to design. Jet pump nozzles are the core components of jet pumps, which significantly affect the efficiency of jet pumps, and most of the designs of jet pump nozzles in the past are liquid-gas, liquid-liquid mixed delivery, with little mixed delivery between solid powder and liquid, among other reasons: a large number of practical application tests are required; based on the loss of a large amount of test equipment; the mixing and conveying between the solid powder and the liquid is single in adaptability to the process conditions and lacks of diversity; because the jet pump nozzle needs to be continuously replaced at the optimal efficiency point of the test, the test cost is high, and sometimes, whether the finally adopted jet pump nozzle works in the optimal efficiency state cannot be ensured. Based on the situation, the patent provides a manufacturing method and a design concept of the open structure jet pump nozzle with the vibration reduction function.
The liquid flowing at high speed passes through a jet pipe propulsion device and a jet pump nozzle which can continuously adjust the position of the jet flow jet pipe, the distance of the channel at the section is longer, and the jet flow efficiency can be ensured to be fully exerted by strict coaxiality. Otherwise, the jet mixed liquid flowing at high speed generates strong flow friction with the wall surface of the expansion chamber of the jet pump nozzle to generate vapor fog, so that the vacuum degree of the jet pump system is reduced, and the efficiency of the flow pump nozzle system is obviously reduced.
When high-speed flowing liquid enters the expansion chamber of the jet pump nozzle from the jet spray pipe, jet noise is increased due to the fact that the area of a flowing cross section is rapidly enlarged, the jet pump nozzle correspondingly generates strong vibration, the noise and the vibration excessively consume energy of jet fluid, and the efficiency of the flow pump nozzle system is remarkably reduced.
In view of this, the solid-liquid mixed delivery open structure jet pump nozzle with vibration reduction function studied herein comprises three main structures: the jet pipe open structure propulsion device can continuously adjust the position of the jet pipe, and comprises a jet pump nozzle and a vibration damper.
The jet pipe open structure propulsion unit capable of continuously adjusting the position of the jet pipe is as follows: the main structure body of the jet pipe propulsion device capable of continuously adjusting the position of the jet flow jet pipe is divided into an upper structure and a lower structure, the lower structure is the main body of the jet pipe propulsion device capable of continuously adjusting the position of the jet flow jet pipe, and the jet pipe propulsion device is of an integrated casting structure; the upper part structure is a buckle cover fixing structure; the spindle portion is a moving member. The open structure obviously improves the manufacturing and processing precision and the convenience of mounting and dismounting, enables the stress distribution of the rotating part to be more uniform, improves the sensitivity of the device and is convenient to operate. The most obvious characteristic of the open structure is that the coaxiality of the jet pipe propulsion device capable of continuously adjusting the position of the jet flow jet pipe is improved, the installation efficiency between the jet pipe propulsion device capable of continuously adjusting the position of the jet flow jet pipe and the jet pump nozzle is also obviously improved, and the jet pump jet pipe is more rapid and convenient to use.
The open structure jet pump nozzle with the vibration reduction function is a standard test type mechanical device which can directly determine the structural parameters of the economical jet pump nozzle. For the nozzle of the jet pump, the important parameter is the position of the jet nozzle, and the position parameter must be accurate, because the position parameter determines the magnitude of jet vacuum, and the position parameter is directly related to the material characteristics and flow rate values of jet fluid and sucked solid powder, so that the development of a high-efficiency nozzle propelling device capable of continuously adjusting the position of the jet nozzle is necessary.
The jet pump nozzle (Z L201410539286.0) capable of continuously adjusting the position of a jet nozzle is a jet pump nozzle with higher efficiency obtained by penmen through long-term practical application and experiments, and the working principle is that a high-pressure mixed liquid flow with lower concentration is pressed into an external pipe by a high-pressure liquid delivery pump (6-8 atm), then the jet nozzle is incident, the potential energy of the liquid is reduced, the kinetic energy is increased, and a jet effect is formed.
The design of the jet pump nozzle (Z L201410539286.0) capable of continuously adjusting the position of the jet pipe takes the expected efficiency mechanism into consideration, but has the defects that the central axis of jet fluid and the axis of the jet pump nozzle cannot be ensured to be coaxial and consistent, so that the efficiency is low, the radial vibration caused by axial flow is large, the manufacturing precision is low, the local position can generate stress concentration to generate blockage and unsmooth operation, the dust and explosion can not be prevented, the jet noise is too large, the noise is not reduced, the energy of the jet fluid is excessively consumed, the installation difficulty is large, the accuracy after installation is not enough, the durability can not be realized, the maintenance cost is higher, and the tableware has obvious defects.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the open structure jet pump nozzle which is reasonable in structure, dustproof, explosion-proof, durable, sensitive and efficient and has a vibration reduction function.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the utility model provides an open structure jet pump nozzle with damping function which characterized in that: the device comprises a spray pipe propelling device, a jet pump nozzle and a damping device, wherein the output end of the spray pipe propelling device is connected with one input end of the jet pump nozzle, the other input end of the jet pump nozzle is connected with a powder solid input device, and the damping device is arranged outside the outlet position of the jet pump nozzle;
the jet pipe propulsion device comprises a middle base plate, a machine base, deep groove ball bearings, a rotary hollow shaft, a push nut, a jet flow jet pipe, a rotary wheel, a shaft seal and a seal gland, wherein the machine base is fixedly arranged at the upper end of the middle base plate; the periphery of the middle part of the rotating hollow shaft is provided with a rotating wheel through a flat key; the jet flow spray pipe is of a circular pipe structure which is transversely arranged, the rear end of the jet flow spray pipe is coaxially inserted into a liquid inlet of the jet pump nozzle, a shaft seal is arranged between the periphery of the jet flow spray pipe and the contact surface of the inner wall of the jet pump nozzle, and a seal gland is fixedly arranged on the axial end face of the shaft seal.
And a rubber dust ring is arranged between the rotary idle shaft in front of the deep groove ball bearing at the rear side and the machine base.
And the end part of a liquid inlet of the jet pump nozzle is connected with the base through a flange, and a rubber damping pad is arranged on the connecting end surface of the jet pump nozzle and the base.
And a radial guide upper cover is arranged at the upper part of the front end of the base, a screw hole is formed in the radial guide upper cover, a guide bolt is arranged in the radial guide upper cover, the lower end of the guide bolt penetrates through the base to be pressed in a groove at the upper end of the front part of the jet flow spray pipe, and the jet flow spray pipe can be limited to move only along the axial direction through a radial adjusting mechanism.
And the upper ends of the deep groove ball bearings on the front side and the rear side are respectively provided with a bearing chamber upper cover, and the bearing chamber upper covers are fixed on the machine base.
And, the concrete position of mounting structure of middle footing board and frame: the front end bracket of the engine base and the middle bracket of the engine base are fixedly arranged on the middle base plate at the front and the back intervals, the front end bracket of the engine base is fixedly supported at the lower end of the front part of the engine base, and the middle bracket of the engine base is fixedly supported at the lower end of the middle part of the engine base.
And the upper side and the lower side of the middle base plate at the mounting position of the bracket at the front end of the engine base are respectively provided with a base plate through bolts, and the upper side and the lower side of the middle base plate at the mounting position of the bracket at the middle part of the engine base are respectively provided with a base plate through bolts.
The jet pump nozzle is of a three-way structure consisting of a liquid inlet, a powder solid inlet and an outlet, an internal cavity of the jet pump nozzle comprises a pressurizing chamber A, a vacuum mixing chamber B and an expansion chamber C, wherein one end of the pressurizing chamber A is connected with the liquid inlet, the other end of the pressurizing chamber A is connected with the vacuum mixing chamber B, the upper end of the vacuum mixing chamber B is connected with the powder solid inlet, and the vacuum mixing chamber B is larger than the pressurizing chamber A; the output end of the vacuum mixing chamber B is connected with the expansion chamber C, and the output end of the expansion chamber C is the outlet of the jet pump nozzle.
And damping device includes the rubber pad, goes up locking collar and vibration damping seat, and the jet pump nozzle is installed to horizontal support in the middle part of vibration damping seat upper end, and axial interval installs two and goes up the locking collar on the vibration damping seat, goes up the locking collar and all overlaps on the jet pump nozzle to fix on the vibration damping seat through bolt nut subassembly respectively in the radial both sides of jet pump nozzle, has cushioned the rubber pad between last locking collar and jet pump nozzle.
The working method of the open structure jet pump nozzle with the vibration reduction function is characterized in that: the high-pressure mixed liquid flow with lower concentration is pressed into an external connecting pipe through a high-pressure liquid delivery pump and then enters an incident flow spraying pipe, the potential energy of the liquid is reduced, the kinetic energy is increased, and a jet flow effect is formed; the liquid flowing at high speed is sprayed into a diffusion shape through the vacuum mixing chamber B, the occupied space volume is increased, part of air is entrained to enter the expansion chamber C, the space volume of the liquid is further increased, and then the liquid enters a conveying pipeline with the same diameter as the outlet end of the expansion chamber C; the liquid flowing at high speed generates vacuum in the process of passing through the pressurizing chamber A to the expansion chamber C, powder solid which slides down freely is sucked into the mixing chamber, and the powder solid is mixed with the high-speed liquid which enters continuously and then enters the expansion chamber C; the mixed liquid returns to the back slurry tank through the conveying pipeline, is sucked by the high-pressure liquid conveying pump again, and then is injected into a jet pump nozzle to form a cycle;
when the technological condition changes or the jet pump nozzle is found not to reach the optimal working efficiency, at the moment, the rotating wheel is continuously rotated leftwards, the pushing nut is also rotated leftwards, the internal thread of the pushing nut pushes the jet spray pipe to move rightwards along the axis by being meshed with the external thread on the jet spray pipe, the jet spray pipe moves rightwards along the axis to cause the diffusion angle of the high-speed sprayed liquid to be relatively increased, so that the treatment capacity of the jet pump nozzle is increased, the efficiency is obviously improved, if the jet spray pipe is continuously adjusted to move rightwards along the axis, the vacuum degree is gradually reduced, the treatment capacity of the device is obviously reduced, and the optimal efficiency point is found in the gradual change process between the increase and the reduction of the treatment capacity of the jet pump nozzle.
The invention has the advantages and positive effects that:
1. the invention can continuously adjust the position of the jet flow spray pipe, can achieve the best process adaptability and can quickly find out the best working point and the maximum working efficiency.
2. The invention can be used as a standard test type master machine of the jet pump nozzles of the same type, simplifies the design complexity after finding the optimal jet efficiency, and can simplify the structure of the jet pump nozzle so as to achieve the aim of saving the processing cost.
3. The structure of the invention carries out one-time casting and one-time sequential processing on the main body structure of the jet pipe open type structure propulsion device which can continuously adjust the position of the jet flow jet pipe so as to ensure the coaxiality of the device, and on the other hand, the vibration damper III can also be used for adjusting the matching coaxiality of the jet pump nozzle II and the jet pipe propulsion device I which can continuously adjust the position of the jet flow jet pipe so as to ensure that the central axes of the jet pump nozzle II and the jet pipe propulsion device I are consistent, thereby effectively reducing the generation of stress concentration of the.
4. The structure can improve the sensitivity of the jet pump nozzle system device, and is easy to operate.
5. The structure is fast and convenient to disassemble and install, can realize batch production, and has good operation stability.
6. The structure reduces the radial vibration of the jet pump nozzle system device and reduces jet noise.
7. This structure is favorable to dustproof explosion-proof.
8. The invention is a standard test type mechanical device which can be directly used for determining the structural parameters of the economical jet pump nozzle; improving the coaxiality of a jet pump nozzle system device; reducing the generation of stress concentration of the system device; the sensitivity of the jet pump nozzle system device is improved, so that the jet pump nozzle system device is easy to operate; the disassembly and the assembly are quick and convenient; mass production can be realized, and the operation stability is good; along with the improvement of the coaxiality of the jet pump nozzle system device, the radial vibration of the jet pump nozzle system device is also reduced; the device jamming phenomenon in the operation process can not be generated; is favorable for dust prevention and explosion prevention.
Drawings
FIG. 1 is a schematic cross-sectional structure of the present invention;
fig. 2 is a top view of fig. 1.
Reference numerals: 1, externally connecting a pipe; 2, a radial adjusting structure; 3, a jet flow spray pipe; 4 pushing the nut; 5, rotating the hollow shaft; 6, an upper cover of the left bearing chamber; 7, deep groove ball bearings; 8 rotating the wheel; 9, a flat bond; 10 rubber dust ring; 11, an upper cover of the bearing chamber; 12 rubber vibration damping pads; 13 sealing the gland; 14 shaft seal; 15 jet pump nozzles; 16 rubber pads; 17, a locking ring is arranged on the base; 18 a vibration damping mount; 19 a stand; 20 middle base plate; 21, a support in the middle of the machine base; 22 a front end bracket of the machine base; 23 skirting board.
And a chamber A: a plenum chamber; and a B chamber: vacuum mixing chambers (e.g., starch and water); and C, chamber C: an expansion chamber.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative only and not limiting, and the scope of the present invention is not limited thereby.
The utility model provides an open architecture jet pump nozzle with damping function, includes spray tube advancing device, jet pump nozzle and damping device, and an input of jet pump nozzle is connected to spray tube advancing device's output, and powdered solid input device (not shown in the figure) is connected to another input of jet pump nozzle, and the exit position externally mounted of jet pump nozzle has damping device, effectively reduces the production of the stress concentration of system's device.
For clarity of description, the left side of the illustration in FIG. 1 is front and the right side is back.
The jet pipe propulsion device comprises a middle base plate 20, a machine base 19, a deep groove ball bearing 7, a rotary hollow shaft 5, a pushing nut 4, a jet flow jet pipe 3, a rotary wheel 8, a shaft seal 14 and a seal gland 13, wherein the upper end of the middle base plate 20 is transversely and fixedly provided with a machine base front end support 22 and a machine base middle support 21 at intervals, the machine base front end support is fixedly supported at the lower end of the front part of the machine base 19, and the machine base middle support is fixedly supported at the lower end of the middle part of the machine base 19; two groups of deep groove ball bearings 7 and components thereof are coaxially arranged at intervals on the front side and the rear side in the machine base, the upper ends of the deep groove ball bearings on the front side and the rear side are respectively provided with a bearing chamber upper cover 11, and the bearing chamber upper covers are fixed on the machine base; a rotary hollow shaft 5 is coaxially arranged in the two groups of deep groove ball bearings 7, a push nut 4 with internal threads is fixedly arranged on the inner circumference of the front end of the rotary hollow shaft, a jet flow spray pipe 3 which is coaxial with the rotary hollow shaft is arranged in the push nut, and external threads are arranged at the front part of the jet flow spray pipe and meshed with the push nut; a swiveling wheel 8 is installed through flat key 9 in rotatory dead axle middle part periphery, rotates the swiveling wheel and can drive rotatory dead axle and rotate to make the push nut rotate, push nut drives the coaxial rotation of efflux spray tube, thereby prolong axial displacement.
The jet flow spray pipe 3 is a circular pipe structure transversely arranged, the rear end of the jet flow spray pipe is coaxially inserted into a liquid inlet of a jet pump nozzle, a shaft seal 14 is arranged between the periphery of the jet flow spray pipe and the contact surface of the inner wall of the jet pump nozzle, a seal gland 13 is arranged on the axial end surface of the shaft seal, and the seal gland is fixed at the end part of the jet pump nozzle through screws to ensure the contact sealing property.
In order to prevent dust from entering the interface position, a rubber dust blocking ring 10 is arranged between the rotary idle shaft in front of the deep groove ball bearing on the rear side and the machine base, and the rubber dust blocking ring has elasticity and can buffer stress.
In order to adjust the axial angle of the jet flow spray pipe conveniently, a radial guide upper cover 2 is installed at the upper part of the front end of the engine base, a screw hole is formed in the radial guide upper cover, a guide bolt capable of being adjusted in a lifting mode is installed in the radial guide upper cover, the lower end of the guide bolt penetrates through the engine base to be pressed in a groove in the upper end of the front portion of the jet flow spray pipe, and the jet flow spray pipe can be limited to move only along the axial direction through a.
The end part of a liquid inlet of the jet pump nozzle is connected with the base through a flange, and a rubber damping pad 12 is arranged on the connecting end surface of the jet pump nozzle and the base, so that the connection and the sealing are ensured to be stable.
In order to ensure the supporting stability and levelness, the upper and lower sides of the middle base plate at the mounting position of the bracket 22 at the front end of the machine base are respectively provided with a base plate 23 through bolts, and the upper and lower sides of the middle base plate at the mounting position of the bracket 21 at the middle part of the machine base are respectively provided with a base plate through bolts.
The jet pump nozzle 15 is a three-way structure consisting of a liquid inlet, a powder solid inlet and an outlet, an internal cavity of the jet pump nozzle comprises a pressurizing chamber A, a vacuum mixing chamber B and an expansion chamber C, wherein one end of the pressurizing chamber A is connected with the liquid inlet, the other end of the pressurizing chamber A is connected with the vacuum mixing chamber B, the upper end of the vacuum mixing chamber B is connected with the powder solid inlet, the vacuum mixing chamber B is larger than the pressurizing chamber A, the output end of the vacuum mixing chamber B is connected with the expansion chamber C, the output end of the expansion chamber C is the outlet of the jet pump nozzle, the included angle between the axis of the pressurizing chamber A and the axis of the expansion chamber C is β, and the included angle between the axis of the output end of the.
Damping device includes rubber pad 16, go up locking collar 17 and damping seat 18, 18 upper end middle parts of damping seat transversely support installation jet pump nozzle 15, axial interval installs two and goes up locking collar 17 on the damping seat, go up the equal suit of locking collar on the jet pump nozzle to fix on the damping seat through bolt and nut subassembly respectively in the radial both sides of jet pump nozzle, fill up the rubber pad between last locking collar and jet pump nozzle, reduce stress, make the operation more stable. The lower end of the damping seat is fixed on the working table through a bolt, and the angle of the jet pump nozzle can be adjusted by adjusting the mounting position and the angle of the damping seat.
The operating principle of the jet pump nozzle in this application:
as shown in the figure, a high-pressure mixed liquid flow with lower concentration is pressed into an external connecting pipe 1 by a high-pressure liquid delivery pump (6-8 atmospheric pressure), and then enters an incident flow nozzle 3, the potential energy of the liquid is reduced, the kinetic energy is increased, and a jet effect is formed. The liquid flowing at high speed is sprayed into a diffusion shape through the vacuum mixing chamber B, the occupied space volume is increased, part of air is entrained to enter the expansion chamber C, the space volume of the liquid is further increased, and then the liquid enters the conveying pipeline with the same diameter as the outlet end of the expansion chamber C. The high-speed flowing liquid generates vacuum in the process of passing through the pressurizing chamber A to the expansion chamber C, and powdery solid which slides freely is sucked into the mixing chamber and enters the expansion chamber C after being mixed with the high-speed liquid which enters continuously. The mixed liquid returns to the back slurry tank through the conveying pipeline, is sucked by the high-pressure liquid conveying pump again, and then is injected into the jet pump nozzle to form a cycle.
When the process conditions change or the nozzle of the jet pump is found not to achieve the optimal working efficiency, the rotating wheel 8 can be continuously rotated leftwards, the rotating hollow shaft 5 is driven to rotate by the flat key 9, because the push nut is fixed on the rotating hollow shaft 5 by the two straight-line groove set screws, the push nut also rotates leftwards, the internal thread of the push nut pushes the jet flow spray pipe 3 to move rightwards along the axis by being meshed with the external thread on the jet flow spray pipe 3, the jet flow spray pipe 3 moves rightwards along the axis to cause the diffusion angle of high-speed sprayed liquid to be relatively enlarged, the treatment capacity of the jet pump nozzle is increased, the efficiency is obviously improved, if the jet nozzle 3 is continually adjusted to move to the right along the axis, the operator will find that the vacuum is gradually decreasing and the throughput of the device is significantly reduced, and then, it is easy to find the best efficiency point in this gradual process between the increase and decrease of the throughput of the jet pump nozzle. The application of the device can obviously improve the working efficiency of the jet pump system.
Description of main part materials: the material of piece 2 (radially directed upper cover), piece 27 (jet pump nozzle), piece 18 (vibration damping mount) and piece 19 (housing) is HT 200; the material of piece 11 (bearing housing upper cover) is ZG 310-570.
The installation method comprises the following steps:
(1) welding preparation: welding the piece 1 (external pipe) on the piece 3 (jet flow spray pipe), straightening and grinding; a plurality of pieces 23 (ground plates) are respectively welded on the pieces 20 (middle ground plates), arc hot welding is adopted, and a welding rod is Z408.
(2) Mounting an intermediate component: sequentially mounting a piece 9 (a flat key) and a piece 8 (a rotating wheel) on a piece 5 (a rotating hollow shaft), and then fixing the pieces on the piece 5 (the rotating hollow shaft) by a straight-groove fastening screw; the left piece 7 (deep groove ball bearing) and related components are sequentially arranged on the piece 5 (rotary hollow shaft); likewise, the right piece 7 (deep groove ball bearing) and its components are mounted in turn on the piece 5 (rotating hollow shaft); sequentially penetrating a piece 3 (a jet spray pipe) through a piece 12 (a rubber damping pad) piece 13 (a sealing gland), a piece 14 (a shaft seal) and a piece 15 (a jet pump nozzle), and fastening the piece 13 (the sealing gland) on the piece 15 (the jet pump nozzle) by using two slotted countersunk head screws so as to compact the graphite sealing filler; the left end of the piece 1 (extension tube) is then passed through the piece 5 from right to left (rotating hollow shaft). It is noted that during this installation, the piece 15 is lifted by means of a sleeper pad or by means of a lifting method (jet pump nozzle) in order to ensure that the piece 3 (jet lance) is not bent or damaged. Then, the member 4 (push nut) is screwed on the member 3 (jet nozzle) until it is close to the left end face of the member 5 (rotating hollow shaft), and then two straight-groove set screws are screwed to fix the member 4 (push nut) on the member 5 (rotating hollow shaft).
(3) And (3) mounting of a fixing component: the intermediate member (2) mounted in the second position is lifted and placed on the member (19) (base), the members (11) (upper covers of the bearing chambers) on the left and right sides are fastened to the corresponding positions of the intermediate member (2) mounted in the second position, and the members (11) (upper covers of the bearing chambers) and the member (19) (base) are fixed together by bolts, washers, and nuts.
The member 2 (upper cover of radial guide) is mounted on the member 19 (machine base), a washer is added on the member 2 (upper cover of radial guide), then the guide bolt is unscrewed, and the smooth part at the lower end of the guide bolt is clamped in the axial groove of the member 1 (external pipe), so that the member does not rotate but can move along the axial direction.
The member 18 (vibration damping seat) is used for supporting the member 15 (jet pump nozzle), the levelness of the member 15 (jet pump nozzle) is tested by a level meter, and if the member is not level, a gasket can be added below the base of the member 18 (vibration damping seat) until the levelness requirement is completely met. The member 16 (rubber pad) and the member 17 (upper locking ring) are sequentially attached to the member 15 (jet pump nozzle), and the member 16 (rubber pad) and the member 17 (upper locking ring) are fastened to the member 18 (vibration damper base) by a member bolt, a washer and a nut.
The flange of the piece 11 (bearing housing upper cover) and the flange of the piece 15 (jet pump nozzle) are fastened together with bolts, washers and nuts. Note that the force applied to the four bolts should be as uniform as possible, otherwise, the overall deflection of the jet pump nozzle is likely to occur. And finishing the installation.
Disassembling sequence:
the bolt, the washer and the nut on the piece 19 (the engine base) are disassembled, and the pieces 11 (the upper covers of the bearing chambers) on the left side and the right side are respectively disassembled; .
Sequentially detaching the washer, the guide bolt, the bolt and the washer on the piece 2 (the radial guide upper cover) and detaching the piece 2 (the radial guide upper cover);
the bolts, washers and nuts on the piece 18 (damping seat) are removed in sequence, the piece 17 (upper locking ring) and the piece 16 (rubber pad) are removed in sequence, the piece 16 (damping seat) is removed, and the piece 15 (jet pump nozzle) is cushioned by a sleeper;
screwing down two straight groove fastening screws on the piece 5 (the rotary hollow shaft), and screwing down the piece 4 (the pushing nut) from the piece 3 (the jet flow spray pipe);
the intermediate member (2) is entirely removed from the member (base) 19, and the member (5) (the hollow shaft) and the parts thereon are entirely pulled out from the member (3) (the jet nozzle) from right to left.
The left piece 7 (deep groove ball bearing) and related components are sequentially detached from the piece 5 (rotating hollow shaft); the piece 8 (rotary wheel) and the piece 9 (flat key) are sequentially dismounted;
the right deep groove ball bearing and the right deep groove ball bearing;
the part 12 (rubber damping pad) is taken down from the flange of the part 15 (jet pump nozzle), two slotted countersunk head screws are screwed down, the part 13 (sealing gland) is taken out, the part 3 (jet spray pipe) is drawn out from the part 15 (jet pump nozzle), and the part 14 (shaft seal) is taken out. And finishing the disassembly.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (10)
1. The utility model provides an open structure jet pump nozzle with damping function which characterized in that: the device comprises a spray pipe propelling device, a jet pump nozzle and a damping device, wherein the output end of the spray pipe propelling device is connected with one input end of the jet pump nozzle, the other input end of the jet pump nozzle is connected with a powder solid input device, and the damping device is arranged outside the outlet position of the jet pump nozzle;
the jet pipe propulsion device comprises a middle base plate, a machine base, deep groove ball bearings, a rotary hollow shaft, a push nut, a jet flow jet pipe, a rotary wheel, a shaft seal and a seal gland, wherein the machine base is fixedly arranged at the upper end of the middle base plate; the periphery of the middle part of the rotating hollow shaft is provided with a rotating wheel through a flat key; the jet flow spray pipe is of a circular pipe structure which is transversely arranged, the rear end of the jet flow spray pipe is coaxially inserted into a liquid inlet of the jet pump nozzle, a shaft seal is arranged between the periphery of the jet flow spray pipe and the contact surface of the inner wall of the jet pump nozzle, and a seal gland is fixedly arranged on the axial end face of the shaft seal.
2. The open architecture jet pump nozzle with damping function of claim 1, wherein: a rubber dust ring is arranged between the rotary idle shaft in front of the deep groove ball bearing at the rear side and the machine base.
3. The open architecture jet pump nozzle with damping function of claim 1, wherein: the end part of a liquid inlet of the jet pump nozzle is connected with the base through a flange, and a rubber damping pad is arranged on the connecting end surface of the jet pump nozzle and the base.
4. The open architecture jet pump nozzle with damping function of claim 1, wherein: the upper part of the front end of the engine base is provided with a radial guide upper cover, the radial guide upper cover is internally provided with a screw hole and is provided with a guide bolt, the lower end of the guide bolt penetrates through the engine base to be pressed in a groove at the upper end of the front part of the jet flow spray pipe, and the jet flow spray pipe can be limited to move only along the axial direction through a radial adjusting mechanism.
5. The open architecture jet pump nozzle with damping function of claim 1, wherein: the upper ends of the deep groove ball bearings on the front side and the rear side are respectively provided with a bearing chamber upper cover, and the bearing chamber upper covers are fixed on the machine base.
6. The open architecture jet pump nozzle with damping function of claim 1, wherein: the specific position of mounting structure of middle base plate and frame: the front end bracket of the engine base and the middle bracket of the engine base are fixedly arranged on the middle base plate at the front and the back intervals, the front end bracket of the engine base is fixedly supported at the lower end of the front part of the engine base, and the middle bracket of the engine base is fixedly supported at the lower end of the middle part of the engine base.
7. The open architecture jet pump nozzle with dampening capabilities of claim 2, wherein: the upper side and the lower side of the middle base plate at the support mounting position at the front end of the engine base are respectively provided with a base plate through bolts, and the upper side and the lower side of the middle base plate at the support mounting position at the middle part of the engine base are respectively provided with a base plate through bolts.
8. The open architecture jet pump nozzle with damping function of claim 1, wherein: the jet pump nozzle is of a three-way structure consisting of a liquid inlet, a powder solid inlet and an outlet, an internal cavity of the jet pump nozzle comprises a pressurizing chamber A, a vacuum mixing chamber B and an expansion chamber C, wherein one end of the pressurizing chamber A is connected with the liquid inlet, the other end of the pressurizing chamber A is connected with the vacuum mixing chamber B, the upper end of the vacuum mixing chamber B is connected with the powder solid inlet, and the vacuum mixing chamber B is larger than the pressurizing chamber A; the output end of the vacuum mixing chamber B is connected with the expansion chamber C, and the output end of the expansion chamber C is the outlet of the jet pump nozzle.
9. The open architecture jet pump nozzle with damping function of claim 1, wherein: damping device includes the rubber pad, goes up locking collar and damping seat, and damping seat upper end middle part transversely supports installation jet pump nozzle, and two last locking collars are installed to the axial interval on the damping seat, go up the equal suit of locking collar on the jet pump nozzle to fix on the damping seat through bolt and nut subassembly respectively in the radial both sides of jet pump nozzle, fill up the rubber pad between last locking collar and jet pump nozzle.
10. The working method of the open structure jet pump nozzle with the vibration reduction function is characterized in that: the high-pressure mixed liquid flow with lower concentration is pressed into an external connecting pipe through a high-pressure liquid delivery pump and then enters an incident flow spraying pipe, the potential energy of the liquid is reduced, the kinetic energy is increased, and a jet flow effect is formed; the liquid flowing at high speed is sprayed into a diffusion shape through the vacuum mixing chamber B, the occupied space volume is increased, part of air is entrained to enter the expansion chamber C, the space volume of the liquid is further increased, and then the liquid enters a conveying pipeline with the same diameter as the outlet end of the expansion chamber C; the liquid flowing at high speed generates vacuum in the process of passing through the pressurizing chamber A to the expansion chamber C, powder solid which slides down freely is sucked into the mixing chamber, and the powder solid is mixed with the high-speed liquid which enters continuously and then enters the expansion chamber C; the mixed liquid returns to the back slurry tank through the conveying pipeline, is sucked by the high-pressure liquid conveying pump again, and then is injected into a jet pump nozzle to form a cycle;
when the technological condition changes or the jet pump nozzle is found not to reach the optimal working efficiency, at the moment, the rotating wheel is continuously rotated leftwards, the pushing nut is also rotated leftwards, the internal thread of the pushing nut pushes the jet spray pipe to move rightwards along the axis by being meshed with the external thread on the jet spray pipe, the jet spray pipe moves rightwards along the axis to cause the diffusion angle of the high-speed sprayed liquid to be relatively increased, so that the treatment capacity of the jet pump nozzle is increased, the efficiency is obviously improved, if the jet spray pipe is continuously adjusted to move rightwards along the axis, the vacuum degree is gradually reduced, the treatment capacity of the device is obviously reduced, and the optimal efficiency point is found in the gradual change process between the increase and the reduction of the treatment capacity of the jet pump nozzle.
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| CN202010183009.6A CN111486137B (en) | 2020-03-16 | 2020-03-16 | Jet pump nozzle with open structure and vibration reduction function |
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| CN202010183009.6A CN111486137B (en) | 2020-03-16 | 2020-03-16 | Jet pump nozzle with open structure and vibration reduction function |
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| CN111486137B (en) | 2022-02-25 |
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