EP3812546B1 - Pompe à broche hélicoïdale - Google Patents

Pompe à broche hélicoïdale Download PDF

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Publication number
EP3812546B1
EP3812546B1 EP20192041.0A EP20192041A EP3812546B1 EP 3812546 B1 EP3812546 B1 EP 3812546B1 EP 20192041 A EP20192041 A EP 20192041A EP 3812546 B1 EP3812546 B1 EP 3812546B1
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EP
European Patent Office
Prior art keywords
housing
screw
pump
housing part
spindle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20192041.0A
Other languages
German (de)
English (en)
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EP3812546A1 (fr
Inventor
Ralf Richter
Susanne Brütting
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leistritz Pumpen GmbH
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Leistritz Pumpen GmbH
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Publication date
Application filed by Leistritz Pumpen GmbH filed Critical Leistritz Pumpen GmbH
Publication of EP3812546A1 publication Critical patent/EP3812546A1/fr
Application granted granted Critical
Publication of EP3812546B1 publication Critical patent/EP3812546B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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
    • F04C2220/00—Application
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • 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
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • 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
    • F04C2240/00—Components
    • F04C2240/60—Shafts
    • 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
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/806—Pipes for fluids; Fittings therefor

Definitions

  • the invention relates to a screw spindle pump, comprising a pump housing with a working spindle accommodated therein and at least one running spindle meshing with it, as well as a connection housing placed on the pump housing with a suction connection and a pressure connection, which communicate fluidically with a suction inlet and a pressure outlet of the pump housing.
  • Screw pumps are used in a wide variety of areas where liquid media are primarily to be pumped, for example in the oil and gas industry, chemical or petrochemical chemistry or in the power plant sector, to name just a few areas of application.
  • a screw pump has a pump housing in which at least two spindles are accommodated and rotatably mounted, namely a working spindle which is coupled to a drive motor which is screwed onto the pump housing and is driven by this, and at least one running spindle which is connected to the working spindle meshes, whereby two running spindles meshing with the one work spindle usually arranged in the middle between them can also be provided.
  • the pump housing is designed quasi cartridge-like and has a suction inlet through which the medium to be pumped is sucked into the pump housing, and a pressure outlet through which the fluid pumped through the spindles is discharged at higher pressure.
  • connection housing is placed on the pump housing, which means that the cartridge-like pump housing is inserted into the connection housing.
  • the connection housing has corresponding interfaces in the form of a suction connection and a pressure connection, to which the corresponding inlet and outlet lines, via which the medium to be conveyed is supplied or discharged, can be connected.
  • the suction port is in fluid communication with the suction inlet of the pump housing, while the pressure port is in fluid communication with the pressure outlet of the pump housing.
  • the suction and pressure connections can be arranged more or less in a line in relation to the longitudinal axis of the screw spindle pump, they can be offset from one another by 90°, but they can also be offset from one another by 180°, and finally the suction connection can also be axial or parallel. be arranged on the front side, while the pressure connection is arranged radially.
  • connection housings which consists of a first and a second housing part, one of which has the suction connection and the other the pressure connection, and both relative to the pump housing are rotatable and both are rotatable relative to each other, wherein the pump housing and the two housing parts can be connected to each other in the selected rotational position.
  • the invention is therefore based on the problem of specifying a screw pump that is improved in comparison thereto.
  • connection housing consists of a first and a second housing part, one of which has the suction connection and the other has the pressure connection, and both of which can be rotated relative to the pump housing and both are rotatable relative to each other.
  • the screw pump according to the invention does not use a one-piece connection housing, as previously, but a two-piece connection housing, consisting of a first and a second housing part, which are arranged axially one behind the other in relation to the longitudinal axis of the pump.
  • the pump housing is cylindrical on the outside in the area where the two housing parts are placed, and the two housing parts are designed as hollow cylinders in a corresponding manner.
  • One housing part is designed as a hollow cylinder that is axially open on both sides and is pushed completely onto the pump housing, while the second housing part is designed almost like a pot and has a bottom, but is also pushed onto the pump housing.
  • One housing part has the suction connection, the other the pressure connection.
  • the three housing elements can be twisted twice in relation to one another.
  • both housing parts are rotatably mounted on the pump housing, i.e. they can both be rotated relative to the pump housing, which basically makes it possible to rotate the two housing parts around the longitudinal axis of the pump, so that there is the possibility of the radially arranged suction and pressure connections to be able to change their circumferential or twisting position relative to the pump housing.
  • the two housing parts can be twisted relative to one another, which means that there is no fixed, unchangeable positioning of the two housing parts relative to one another, but also variable positioning by twisting about the longitudinal axis of the pump. This allows the radial suction and pressure ports to be placed in different positions relative to each other.
  • suction and pressure connections along the longitudinal axis of the pump, i.e. to arrange them linearly one behind the other, with both connections being able to be arranged, for example, in a central 0° position in relation to the stationary pump housing by rotating them together about the longitudinal axis of the pump, in a +90° position twisted in one direction and a -90° position twisted in the other direction, as they can theoretically both be twisted together by 180°.
  • the suction and the pressure connection are not aligned with each other, but at an angle of, for example, 90° or 180° to one another, for which it is only necessary to turn the two housing parts by the corresponding, desired intermediate angle between the two connections to twist the longitudinal axis of the housing.
  • the suction connection of one housing part is connected to the suction inlet of the Pump housing fluidly coupled, while the pressure port of the other housing part is fluidly coupled to the pressure outlet of the pump housing part.
  • the screw pump according to the invention thus makes it particularly advantageous to produce a large number of different screw pumps, which differ in the connection geometry or the position of the suction and pressure connections, using a standardized pump housing and the two likewise standardized housing parts. It is only necessary to push the two housing parts onto the pump housing and to bring them into the desired rotational position relative to the pump housing and to each other, depending on the required connection geometry, after which it is only necessary to fix the two housing parts to one another, and to attach a housing part to the To connect the pump housing so that the components are firmly connected to each other in the desired orientation or geometry. This makes it possible to keep a large number of standardized first and second housing parts in stock, since a large number of different screw pump types can be produced from them using the standardized pump housing.
  • a complex individual production of a one-piece connection housing which is only produced for a specific screw pump or a specific type of screw pump, as provided in the prior art, is no longer given with particular advantage. Rather, the screw pump according to the invention is a highly flexible, modular system that allows the production of different pump types in an extremely simple manner.
  • Each housing part can be rotated by at least 45°, preferably by at least 90° and in particular by at least 180° relative to the pump housing, but larger angles of rotation of up to 360° are also conceivable, which means that there is ultimately no restriction on the rotation of a housing part relative to the pump housing is.
  • a suction chamber and a pressure chamber are to be formed within the connection housing towards the pump housing, with the suction connection and the suction inlet lying or leading into the suction chamber, while the pressure connection and the pressure outlet lying or leading into this in the pressure chamber.
  • a development of the invention provides for arranging sealing elements, via which the housing parts are sealed against one another and at least one housing part is also sealed off from the pump housing.
  • the two housing parts are sealed from one another by at least one first sealing element, since, as described, they can be rotated relative to one another, so that there must be a sealing plane between them.
  • at least one housing part is also sealed off from the pump housing.
  • the separation between the suction chamber and the pressure chamber at the interface between the connection housing and the pump housing is effected via this seal, and the connection housing as a whole is also sealed relative to the pump housing.
  • the housing part that has the suction connection is sealed from the housing part that has the pressure connection with a first sealing level, while the housing part that has the pressure connection is sealed from the pump housing, with two sealing levels being formed here, namely the suction chamber and the The sealing plane that separates the pressure chamber from one another, and the other sealing plane that seals off the connection housing and the pump housing from one another.
  • an advantageous development of the invention provides that one of the housing parts has a cylindrical, axially extending flange which engages in an annular fold on the other housing part, the sealing element sealing the two housing parts from one another seals between the flange and the ring fold. Flange and ring fold thus engage axially in one another, so that a radial seal is possible between the two via the sealing element. An axial seal would also be possible here. Ring seals inserted into corresponding ring receptacles, which are formed on the corresponding components, are preferably used as sealing elements.
  • ring seals or O-rings which are preferably made of a suitable plastic material, are firmly anchored in the corresponding ring receptacles and are in contact with the corresponding counterpart with sufficient tension, so that a defined sealing plane is formed. Even when assembled, the ring seals allow the housing parts to rotate relative to each other and one housing part relative to the pump housing, with this rotation occurring only once and only by a correspondingly small angular increment until the desired twisted position is reached, after which the components such as described firmly connected to each other, so that no further rotation takes place.
  • the suction inlet is fluidly coupled to the suction connection and the pressure outlet is fluidly coupled to the pressure connection.
  • the suction inlet is via one or more radial inlet openings distributed in the circumferential direction on the pump housing, which open into a space formed between one housing part and the pump housing, and the pressure outlet via one or more in Circumferentially distributed on the pump housing formed radial outlet openings, which open into a space formed between the second housing part and the pump housing.
  • the pump housing there are at least one, but preferably several, radial inlet and outlet openings on the pump housing provided, which open into respective mostly ring-shaped spaces, so that in any case, regardless of the twisted position, there is a fluidic coupling.
  • the inlet and outlet openings can be designed as radial bores, alternatively they can also be designed as larger rectangular and window-like openings.
  • Such a window-like configuration of the inlet openings is conceivable, for example, to form the suction inlet, with such a window-like opening being able to extend, for example, by approximately 90° in the circumferential direction. Two such window-like inlet openings offset by 180° can then be provided, for example.
  • the outlet openings can be designed, for example, in the form of radial bores, and since these are smaller than the window-like openings, four or six such radial bores can be distributed around the circumference of the pump housing. This means that in principle the inlet and outlet openings can be of the same type, but they can also be different.
  • the pump housing is axially closed via an axial base, on which the two or three spindles are usually hydraulically mounted and supported, it can be provided to ensure a sufficient inflow cross section that this terminal base of the pump housing is provided with further axial inlet openings, which are also form the suction inlet together with the radial inlet ports. This means that not only a radial inflow into the pump housing is possible, but also an axial inflow.
  • the pressure connection is arranged radially, i.e. it extends laterally from the connection housing.
  • the suction connection can also be radial, i.e. it can also run radially to the connection housing or the longitudinal axis of the pump.
  • there is the possibility of additionally providing an axial suction connection which is thus arranged as it were in an extension of the longitudinal axis of the pump and is formed on the bottom of the terminal, pot-like housing part.
  • This axial suction connection expands the range of connections and thus the entire range of pump types that can be produced with the modular system according to the invention.
  • the unused suction connection is tightly sealed with a suitable closure element, in particular a closure plug, which closure plug is easily screwed into a corresponding internal thread formed in the bore that defines the suction connection, using a sealing element.
  • a closure plate ie a blind plate for closing the suction connection that is not required, can also be fastened, in particular screwed on.
  • the axial inlet openings described above are preferably formed in the bottom of the pump housing, which are then more or less in the axial extension of the axial suction connection.
  • the screw pump according to the invention is characterized in that the two housing parts can be rotated relative to the pump housing and also relative to one another. They are then fixed to one another in the desired twisted position. It is conceivable that the housing parts can be fixed to one another in relation to each other and one housing part in its rotational position relative to the pump housing either in specific rotational positions or in any desired rotational positions. This means that either predetermined twisted positions can be assumed relative to one another, which are defined by a defined angular division in the circumferential direction, or any, ultimately undefined twisted positions. As a rule, several defined twist positions are sufficient to cover the desired application-related geometry spectrum, but usage scenarios are also conceivable in which, due to local conditions, a twist angle that deviates from the usual line geometry has to be set.
  • the fixing of the two housing parts to one another and of one housing part to the pump housing is preferably effected via screw connections, with the screw connections being located axially.
  • the components can be fixed to one another in predetermined twisted positions be that on the terminal housing part there are several axial through-holes distributed in the circumferential direction and on the adjacent housing part there are several axial internally threaded holes distributed with the same pitch in the circumferential direction, and that on a radial flange of the pump housing there are several axial through-holes distributed in the circumferential direction and on the adjacent housing part several, with the same pitch Pitch distributed in the circumferential direction axial internally threaded bores are provided.
  • the defined twisting positions are thus defined here by means of corresponding through-holes and internally threaded bores with the same pitch, which means that the pitch angle is defining for the twisting positions to be assumed.
  • the parts can only be fastened to one another if the corresponding through holes and internally threaded holes are aligned.
  • the pitch angle or the pitch of the through and internally threaded bores can be between 15°-90°, in particular between 22.5°-45°.
  • the respective division angle should always be selected so that the suction and pressure connections are axially aligned with each other or at +/-90° - Arrangement can be positioned to each other to form the most common geometries can. This is possible, for example, with a pitch angle of 15°, 22.5° and 45°, with these pitch angles also enabling 45° positions. The smaller the pitch angle, the more intermediate positions can be taken.
  • At least two axially open elongated holes extending in the circumferential direction can be provided on the terminal housing part and several axial internally threaded bores distributed in the circumferential direction can be provided on the adjacent housing part, and/or at least two axially extending in the circumferential direction can be provided on a radial flange of the pump housing open slotted holes and on the adjacent housing part a plurality of axial internally threaded bores distributed in the circumferential direction are provided.
  • two such elongated holes which each extend about 170° around the circumference, can be provided, and for example six internally threaded bores, so that three connecting screws each reach through an elongated hole, the internally threaded bore pitch then being 60°, for example.
  • connection of the two housing parts in any desired angular position and the connection of one housing part to the pump housing only in distinct positions, or vice versa.
  • connection options on a pump possible.
  • drain holes distributed in the circumferential direction and closed with detachable sealing plugs, leading into the interior of the connection housing are expediently provided on each housing part. These drain holes communicate with the respective annular space of the suction space and the pressure space.
  • a plurality of drain holes distributed in the circumferential direction are provided per housing part in order to ensure that, depending on the twisted position of the respective housing part, one drain hole is always oriented at least approximately downwards.
  • three drain holes offset by 90° to one another are used per housing part, with two drain holes offset by 90° to the suction or pressure connection are arranged, while the third connection hole is diametrically opposed to this.
  • a flat fastening area with several internally threaded bores for fastening a line to be connected to the suction and pressure connection is expediently formed on both housing parts in the area of the suction and pressure connection.
  • the respective line can be connected directly to this fastening area; the flat fastening area forms a corresponding connection level, which can be easily sealed off from the line.
  • the cable is fastened using appropriate connecting screws, which are screwed into the internally threaded holes in the fastening area.
  • this flat fastening area can also serve as an interface for an adapter plate, which the system according to the invention can also comprise.
  • This adapter plate can be releasably fastened to the fastening area, for which purpose the adapter plate has corresponding through-holes through which connecting screws are guided, which are screwed into the internally threaded bores in the fastening area.
  • the adapter plate itself has corresponding fastening devices, in particular internally threaded bores for fastening at least one connection flange plate, which then forms the corresponding connection interface for the line.
  • adapter plate By interposing this adapter plate, there is the possibility of providing a connection interface for several different connection flange plates, which have different DIN connection interfaces for the line, in order to be able to connect different line types in this way.
  • the adapter plate has a correspondingly sealed passage to the respective suction and pressure connection.
  • adapter plate means any adapter element, since on the one hand it can be fixed to the suction and pressure connection or the corresponding fastening area, and that which has the appropriate fastening options for a connecting flange plate.
  • a foot element is detachably attachable, so it can be arranged if necessary.
  • the base element is preferably fixed to the pump housing, for example to its radial flange.
  • the foot element can be L-shaped or U-shaped and have a leg with at least two bores provided thereon, through which the screw connections, via which the pump housing is connected to the adjacent housing part, engage.
  • the base element is fixed using the connecting screws, which are also used to connect the pump housing and the adjacent housing part.
  • the second leg which runs parallel to the longitudinal axis of the pump, then rests on the bottom side, the pump itself is only supported by the one vertical leg which is then fixed to the pump housing.
  • a leg resting on the lower z.
  • B. vertically upwardly projecting third leg is provided which rests against the connector housing and defines a second support plane. This makes it possible to safely support larger, heavier pumps.
  • FIG. 1 shows an exploded view of a screw pump 1 according to the invention.
  • This comprises a pump housing 2, in which a drive spindle 3 (see 2 ), which is to be connected via a connecting pin 4 to a drive motor (not shown in detail) to be connected to the pump housing 2, and at least one running spindle 16 meshing with the drive spindle 3 is accommodated.
  • the pump housing 2 has a cylindrical housing section 5 which is limited axially by a base plate 6 of a base part 7 at the end.
  • This bottom part 7 is connected via corresponding screw connections 8 to a second pump housing part 9, which has a radial flange 10 in addition to the other part of the cylindrical section 5, and which is also axially limited via a terminal flange 11, to which the housing of the drive motor is to be attached is.
  • corresponding mounting holes 12 are provided for setting corresponding connecting screws.
  • trough-shaped depressions 13 are formed, which are used for the insertion of connecting screws 14 with the aid of which a connecting housing to be described below is fixed to the pump housing 2 .
  • First inlet openings 15 are provided in the area of the base plate 6 on the cylindrical section 5 of the pump housing 2, with two such inlet openings 15 being provided opposite one another.
  • the inlet openings 15 have a quasi-rectangular cross-section and are window-like and extend, for example, by an angular segment of approximately 90°.
  • the running spindle 16 can be seen through the inlet opening 15 shown.
  • These inlet openings 15 define a suction inlet 17 which is further formed via axial inlet openings 18 formed on the bottom plate 6. The fluid to be pumped reaches the working area of the spindles 3, 16 via this suction inlet 17.
  • a plurality of outlet openings 20 in the form of radial bores are formed on the pump housing 2 to form a pressure outlet 19, with four inlet openings 20 offset by 90° being provided in the example shown. The pumped fluid emerges from these again with the appropriate pressure.
  • ring receptacles 21 provided on the cylindrical section 5, into which, see 2 ,
  • a ring seal 22 is used, which serves to seal the connection housing. So simple O-rings are used as ring seals.
  • connection housing 23 In the case of the assembled pump, a connection housing 23 is pushed onto the pump housing 2 or the pump housing 2 is pushed with its cylindrical section 5 into the connection housing 23 .
  • the connection housing 23 consists of a first housing part 24, which is designed like a pot and has a bottom 25, and a cylindrical cavity 26, in which, see 2 , the front end of the pump housing 2 engages.
  • the first housing part 24 has a first suction connection 27 in the form of a radial internally threaded bore, which is formed on a flat fastening section 28 which offers a flat fastening interface for a supply line to be connected or an adapter plate to be described below.
  • Four internally threaded bores 29 are formed on the attachment section 28, to which either the line can be screwed or the adapter plate.
  • sealing plug 30 with an associated sealing ring 31 that can be set optionally here.
  • the sealing plug 30 is screwed into the suction connection 27 if this is not required.
  • the second suction connection 32 formed on the base plate 25 which is also formed in the form of an internally threaded bore and which is also assigned four fastening bores 33 for connecting the supply line or an adapter plate. Since present, see 1 If such an axial connection of an adapter plate is shown as an option, the sealing plug 30 would consequently have to be screwed into the first pressure connection 27 . If the adapter plate were to be attached to the first pressure connection 27 , the sealing plug 30 would of course have to be screwed into the second pressure connection 32 .
  • the first housing part 24 on the base plate 25 has a plurality of through-bores 34 through which corresponding connecting screws 35 that produce screw connections are inserted, which are used to firmly connect the first housing part 24 to a second, axially adjoining housing part, which is described below .
  • drain holes 36 are provided on the first housing part 24, preferably offset by 90°, one of which in 1 and one in 2 is shown, and which are each closed by means of a sealing plug 37 with an associated sealing ring 38 . In the event of maintenance, the fluid in the pump can be drained off via these drain plugs.
  • a second housing part 39 is also shown, which axially follows the first housing part 24 and, when pushed onto the cylindrical shoulder 5 of the pump housing 2 , is arranged between the first connection housing 24 and the radial flange 10 .
  • It is designed as a hollow cylinder, i.e. it has a hollow-cylindrical inner shape, see 2 , wherein two radially inwardly projecting annular shoulders 40 are formed on the inner circumference, see 2 , on which the respective ring seal 22 rests sealingly.
  • a suction space 41 in the region of the first housing part 24 and the second housing part 39 up to the first annular shoulder 40 and the sealing plane there, with the suction space 41 being filled with the both suction connections 27, 32 open out, as well as a pressure chamber 42 between the second housing part 39 and the pump housing 2 in the area between the two sealing levels formed by the ring seals 22, with the pressure connection 43, which is formed on the second housing part 39, opening into this suction space, please refer 2 .
  • the outlet openings 20 also open into this pressure chamber 42, just as the two inlet openings 15 open into the suction chamber 41, so that there is a fluidic connection from the respective suction connection 27, 32 to the pressure connection 43.
  • the pressure connection 43 is also formed here on a flat fastening section 44 and is again designed in the form of an internally threaded bore.
  • the flat attachment section 44 in turn serves as an attachment interface for a discharging line or for an adapter plate to be described below.
  • Appropriate internally threaded bores 45 are also provided here for fastening the line or the adapter plate.
  • the second housing part 39 has three z. B. distributed by 90 ° arranged drain holes 46, which are closed by corresponding plugs 47 with associated sealing ring 48. Fluid located in the pressure chamber 42 can be discharged via these, while fluid located in the suction chamber can be discharged via the discharge bores 36 .
  • the first housing part 24 has an axially extending annular flange 50, see FIG 2 , which engages in an annular fold 51 on the second housing part 39.
  • An annular seal 53 in the form of an O-ring is accommodated in an annular receptacle 52 on the annular flange 50, so that the two housing parts 24, 39 are radially sealed against one another.
  • the second housing part 39 is first pushed onto the cylindrical section 5, on which the corresponding ring seals 22 are already arranged, until it rests against the radial flange 10.
  • the second housing part 24, on which the ring seal 53 is arranged, is then pushed on. Both housing parts 24, 39 are brought into the desired twisted position relative to one another, just as they are brought together into a desired twisted position relative to the pump housing 2 or to the radial flange 10.
  • the two housing parts 24, 39 are firmly screwed together via the connecting screws 35, and the entire connection housing 23 is screwed together via the connecting screws 14, which are inserted through corresponding through bores 54 on the radial flange 10 and into corresponding axial internally threaded bores 55 are screwed into the end face of the second housing part 39, fixed.
  • an adapter plate 60, 61 onto the respective fastening section 28, 44 or the base 25 by means of the connecting screws 56, 57 with the interposition of the ring seals 58, 59.
  • the adapter plates 60, 61 have corresponding through-bores 62, 63, through which the corresponding connecting screws 56, 57, which are screwed into the internally threaded bores 29 or 33 or 45, pass.
  • the adapter plates 60, 61 also have four additional internally threaded bores 64, 65 in the example shown, which are used to fasten a connecting flange plate 66, 67, for which purpose the latter has corresponding through bores 68, 69 through which the corresponding connecting screws 70, 71 are inserted and in the internally threaded bores 64, 65 of the adapter plates 60, 61 are screwed. It would also be conceivable to provide through holes instead of the internally threaded bores 64, 65 and to screw the connecting screws 70, 71 into the internally threaded bores 29, 30 and 45, respectively.
  • annular seal 72, 73 is interposed, which is formed in a corresponding annular receptacle 74, 75 on the adapter plate 60, 61.
  • This connection flange plate 66, 67 also has internally threaded bores 76, 77 into which connecting screws (not shown in detail) by means of which the corresponding line is then attached are screwed.
  • the arrangement of this Internally threaded holes 76, 77 can be different from flange plate to flange plate, which means that different flange plates with different hole patterns and thus different standardized connection geometries can be used.
  • a foot element 78 is provided, which is L-shaped here and has a vertically running fastening leg 79, on which corresponding through-holes 80 are formed, which are secured by two fastening screws 14, which serve to connect the radial flange 10 to the second housing part 39. be reached through, so that here the foot element 78 can be optionally attached to the pump.
  • the foot element 78 rests on the floor via a second horizontally running leg 81, so that the screw pump 1 is supported on this.
  • FIG. 2 shows, as described, a sectional view through a screw pump 1 according to the invention, in which case, unlike in 1 is shown, the adapter plate 60 is arranged on the suction connection 27, while the suction connection 32 is closed via the sealing plug 30.
  • the suction connection 27, which is of course extended radially outwards via the corresponding bores in the adapter plate 60 and the connection flange plate 66, opens into the suction chamber 41, which extends to the first sealing level, realized via the first sealing element following axially to the right in the form from the ring seal 22 extends.
  • Inflowing or suctioned fluid enters the pump housing 2 via the inlet openings 15 and is guided there via the spindles 3, 16 to the outlet openings 20, where it exits into the surrounding, ring-shaped suction chamber 42 and reaches the pressure connection 43, which of course also has corresponding Holes in the adapter plate 61 and the flange plate 67 is extended to the outside.
  • the Figures 5 - 16 show a total of twelve examples of how the suction ports 27 and 32 and the pressure port 43 can be positioned relative to each other. In all in the Figures 5 - 16 In the variants shown, the position of the pump housing 2 is the same in each case, only the housing parts 24 and 39 are placed in different positions either only relative to the pump housing 2 or also relative to one another.
  • FIG 5 , 6 and 7 show a linear arrangement of the suction and pressure connections 27, 43, ie along the longitudinal axis of the pump. While they, starting from figure 5 and view of the mounting flange 11 of the pump housing 2, in figure 5 are facing to the right, they stand in 6 quasi-vertical up while in 7 are directed to the left.
  • the housing parts 24, 39 are not rotated relative to each other here, but in different positions differing by 90°.
  • suction port 27 is directed to the right, while the pressure port 43 is directed upwards. Both are at an angle of 90° to one another, that is to say they are rotated by two 45° pitches and fastened to one another by means of the connecting screws 35 .
  • the pressure connection 43 is again rotated by 90°, so that the suction connection 27 and the pressure connection 43 are directed in opposite directions, thus the two housing parts 24, 39 are rotated by 180° to one another.
  • the suction port starting from 9 , rotated by 90° and points vertically upwards, while the pressure connection 43 is still pointing to the left.
  • a 90° configuration is provided.
  • suction connection 27 is rotated by a further 90° relative to the pressure connection 43. Both point in opposite directions, so the housing parts 24, 39 are rotated through 180° to one another.
  • This variant is the mirror image of the arrangement according to FIG 9 .
  • suction and pressure connections 27, 43 can also be arranged at an angle of 45° or 135° to one another, if required.
  • the 14, 15 and 16 show three arrangement variants in which the axial suction port 32 is used. While in the configurations according to the Figures 5 - 13 the axial suction port 32 is closed via the sealing plug 30, in the configurations according to FIG Figures 14 - 16 the radial suction connection 27 is closed via the sealing plug 30.
  • the radial suction connection 43 is changed relative position of the radial pressure connection 43 relative to the axial suction connection 32 . While he 14 is directed to the right, he is according to the design 15 vertically up. In accordance with the design 16 the pressure connection 43 is finally directed to the left.
  • All these different pump configurations can be realized with one and the same set of pump components. Because the modular system according to the invention makes it possible, using a standardized pump housing 2 and the use of two standardized housing parts 24, 39, to form these different configurations by simply rotating the components relative to one another. This offers an extremely high degree of flexibility with regard to the pump design while at the same time being simple, since only the standardized pump housing 2 with its likewise standardized internal components (spindles, etc.) and standardized first and second housing parts 24, 39 have to be kept available.
  • the 17 and 18 show a further embodiment of a screw pump 1 according to the invention in the form of simplified schematic representations, the same reference numbers being used for the same components. For reasons of simplicity, according to the exploded view is shown here 17 only a reduced number of components shown. In principle, however, the basic structure of this screw pump also corresponds to that described above.
  • a pump housing 2 and a connection housing 23 are also provided here, comprising a first housing part 24 and a second housing part 39. These are in turn pushed onto the cylindrical section of the pump housing 2 in the manner described above and sealed relative to one another and to the pump housing 2 by means of corresponding sealing elements.
  • a radial flange 82 is placed between the two housing parts 24,39. It has through holes 83 which are aligned with the through holes 34 on the first housing part 24 .
  • the connecting screws 35 reach through the through bores 34 and 83 and are also screwed into the corresponding internally threaded bores 49 on the second housing part 39 here.
  • the radial flange 82 has through bores 84 which are radially further to the outside and are used to accommodate connecting screws, via which the screw pump 1 can be screwed to a fastening geometry that is not shown in detail.
  • a suction pipe 85 is connected to the axial suction inlet 32 and has a fastening flange 86 with through holes 87 through which the connecting screws 56 are guided, which are screwed into the internally threaded holes 33 in the base 25 of the first housing component 24 .
  • the second suction port 27 is closed here by means of the sealing plug 30 .
  • an adapter plate 61 is fixed to the fastening section 44 with the pressure connection 43 by means of the fastening screws 57 .
  • This design allows for the formation of a submersible pump that can be mounted in a tank in either a horizontal or vertical configuration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)

Claims (23)

  1. Pompe à broche hélicoïdale, comprenant un boîtier de pompe (2) avec une broche de travail (3) logée dans celui-ci et au moins une broche de roulement (16) engrenant avec celle-ci, ainsi qu'un boîtier de raccordement (23) placé sur le boîtier de pompe (2) avec un raccord d'aspiration (27, 32) et un raccord de pression (43) qui communiquent fluidiquement avec une entrée d'aspiration (17) et une sortie de pression (19) du boîtier de pompe (2), caractérisée en ce que le boîtier de raccordement (23) est constitué d'une première et d'une deuxième partie de boîtier (24, 39), dont l'une présente le raccord d'aspiration (27, 32) et l'autre le raccord de pression (43), et qui peuvent toutes deux être tournées par rapport au boîtier de pompe (2) et qui peuvent toutes deux être tournées l'une par rapport à l'autre, le boîtier de pompe (2) et les deux parties de boîtier (24, 39) pouvant être reliées entre eux dans la position de rotation choisie.
  2. Pompe à broche hélicoïdale selon la revendication 1, caractérisée en ce que chaque partie de boîtier (24, 39) peut être tournée d'au moins 45° par rapport au boîtier de pompe (2).
  3. Pompe à broche hélicoïdale selon la revendication 2, caractérisée en ce que chaque partie de boîtier (24, 39) peut être tournée de 360° par rapport au boîtier de pompe (2).
  4. Pompe à broche hélicoïdale selon l'une quelconque des revendications précédentes, caractérisée en ce que des éléments d'étanchéité (22, 53) sont prévus, par l'intermédiaire desquels les parties de boîtier (24, 39) sont rendues étanches l'une par rapport à l'autre et au moins une partie de boîtier (39) également par rapport au boîtier de pompe (2).
  5. Pompe à broche hélicoïdale selon la revendication 4, caractérisée en ce que la partie de boîtier (24) présentant le raccord d'aspiration (27, 32) est rendue étanche par rapport à la partie de boîtier (39) présentant le raccord de pression (43) et la partie de boîtier (39) présentant le raccord de pression (43) est rendue étanche par rapport au boîtier de pompe (2).
  6. Pompe à broche hélicoïdale selon la revendication 4 ou 5, caractérisée en ce que l'une des parties de boîtier (24) présente une bride cylindrique (50) s'étendant axialement, qui s'engage dans une feuillure annulaire (51) sur l'autre partie de boîtier (39), l'élément d'étanchéité (53) assurant l'étanchéité des deux parties de boîtier (24, 39) l'une par rapport à l'autre assurant l'étanchéité entre la bride (50) et la feuillure annulaire (51).
  7. Pompe à broche hélicoïdale selon l'une quelconque des revendications 4 à 6, caractérisée en ce que des joints annulaires insérés dans des logements annulaires (21, 52) sont prévus en tant qu'éléments d'étanchéité (22, 53).
  8. Pompe à broche hélicoïdale selon l'une quelconque des revendications précédentes, caractérisée en ce que l'entrée d'aspiration (17) est formée par une ou plusieurs ouvertures d'entrée radiales (15) réalisées de manière répartie sur le boîtier de pompe (2) dans la direction circonférentielle, qui débouchent dans un espace d'aspiration (41) réalisé entre une partie du boîtier (24) et le boîtier de pompe (2), et la sortie de pression (19) est formée par une ou plusieurs ouvertures de sortie radiales (20) réalisées sous de manière répartie sur le boîtier de pompe (2) dans la direction circonférentielle, qui débouchent dans un espace de pression (42) réalisé entre la deuxième partie de boîtier (39) et le boîtier de pompe (2).
  9. Pompe à broche hélicoïdale selon la revendication 8, caractérisée en ce qu'au moins deux ouvertures d'entrée et au moins quatre ouvertures de sortie (15, 20) sont prévues.
  10. Pompe à broche hélicoïdale selon la revendication 8 ou 9, caractérisée en ce que d'autres ouvertures d'entrée axiales (18) formant l'entrée d'aspiration (17) sont réalisées sur un fond terminal (6) du boîtier de pompe (2) .
  11. Pompe à broche hélicoïdale selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un seul raccord d'aspiration radial (27) ou un raccord d'aspiration radial et un raccord d'aspiration axial (27, 32) sont prévus sur la partie du boîtier (24) située du côté de l'aspiration.
  12. Pompe à broche hélicoïdale selon la revendication 11, caractérisée en ce que, dans le cas de deux raccords d'aspiration (27, 32), l'un est fermé au moyen d'un élément de fermeture amovible, notamment d'un bouchon de fermeture (30).
  13. Pompe à broche hélicoïdale selon l'une quelconque des revendications précédentes, caractérisée en ce que les parties de boîtier (24, 39) peuvent être fixées l'une à l'autre et une partie de boîtier (39) peut être fixée dans sa position de rotation par rapport au boîtier de pompe (2) dans des positions de rotation caractérisées ou quelconques.
  14. Pompe à broche hélicoïdale selon la revendication 13, caractérisée en ce que des liaisons par vis (14, 35) sont prévues pour la fixation.
  15. Pompe à broche hélicoïdale selon la revendication 14, caractérisée en ce que plusieurs alésages traversants axiaux (34) répartis dans la direction circonférentielle sont prévus sur la partie de boîtier terminale (24) et plusieurs alésages à filetage intérieur axiaux (49) répartis avec le même pas dans la direction circonférentielle sont prévus sur la partie de boîtier voisine (39), et/ou en ce que plusieurs alésages traversants axiaux (12) répartis dans la direction circonférentielle sont prévus sur une bride radiale (10) du boîtier de pompe (2) et plusieurs alésages à filetage intérieur axiaux (55) répartis avec le même pas dans la direction circonférentielle sont prévus sur la partie de boîtier voisine (39).
  16. Pompe à broche hélicoïdale selon la revendication 15, caractérisée en ce que les alésages traversants et les alésages à filetage intérieur (12, 34, 49, 55) présentent un pas compris entre 15° et 90°, notamment entre 22,5° et 45°.
  17. Pompe à broche hélicoïdale selon l'une quelconque des revendications 1 à 14, caractérisée en ce qu'au moins deux trous oblongs ouverts axialement s'étendant dans la direction circonférentielle sont prévus sur la partie de boîtier terminale (24) et plusieurs alésages à filetage intérieur axiaux (49) répartis dans la direction circonférentielle sont prévus sur la partie de boîtier voisine (39), et/ou en ce qu'au moins deux trous oblongs axiaux s'étendant dans la direction circonférentielle sont prévus sur une bride radiale (10) du boîtier de pompe (2) et plusieurs alésages à filetage intérieur axiaux (55) répartis dans la direction circonférentielle, sur la partie de boîtier voisine (39).
  18. Pompe à broche hélicoïdale selon l'une quelconque des revendications précédentes, caractérisée en ce que plusieurs alésages de sortie (36, 46) répartis dans la direction circonférentielle et fermés par des bouchons de fermeture amovible (37, 47) sont prévus sur chaque partie de boîtier (24, 39), qui conduisent à l'intérieur du boîtier de raccordement (5).
  19. Pompe à broche hélicoïdale selon la revendication 18, caractérisée en ce que trois alésages de sortie (36, 46) agencés en décalage de 90° les uns par rapport aux autres sont prévus pour chaque partie de boîtier (2, 39).
  20. Pompe à broche hélicoïdale selon l'une quelconque des revendications précédentes, caractérisée en ce qu'une zone de fixation plane (28, 44) avec plusieurs alésages à filetage intérieur (29, 45) est réalisée sur les deux parties de boîtier (24, 39) dans la zone du raccord d'aspiration et de pression (27, 43) pour fixer une conduite à raccorder au raccord d'aspiration et de pression (27, 43).
  21. Pompe à broche hélicoïdale selon la revendication 20, caractérisée en ce qu'une plaque d'adaptation (60, 61) est prévue, qui peut être fixée de manière amovible à la zone de fixation (28, 44) et qui présente des dispositifs de fixation, notamment des alésages à filetage intérieur (68, 69), pour la fixation d'au moins une plaque de bride de raccordement (66, 67).
  22. Pompe à broche hélicoïdale selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un élément de pied (78) pouvant être monté de manière amovible, de préférence sur le boîtier de pompe (2), est prévu.
  23. Pompe à broche hélicoïdale selon la revendication 22, caractérisée en ce que l'élément de pied (78) est en forme de L ou de U et présente une branche (79) avec au moins deux alésages (80) prévus sur celle-ci, à travers lesquels s'engagent des liaisons par vis (14), par l'intermédiaire desquelles le boîtier de pompe (2) est relié à la partie de boîtier voisine (39).
EP20192041.0A 2019-10-23 2020-08-21 Pompe à broche hélicoïdale Active EP3812546B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019128602.6A DE102019128602B3 (de) 2019-10-23 2019-10-23 Schraubenspindelpumpe

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EP3812546A1 EP3812546A1 (fr) 2021-04-28
EP3812546B1 true EP3812546B1 (fr) 2023-07-19

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US (1) US11319953B2 (fr)
EP (1) EP3812546B1 (fr)
CN (1) CN112696353B (fr)
BR (1) BR102020019605A2 (fr)
DE (1) DE102019128602B3 (fr)
ES (1) ES2956864T3 (fr)
PL (1) PL3812546T3 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021133112A1 (de) 2021-12-14 2023-06-15 Leistritz Pumpen Gmbh Schraubenspindelpumpe
DE102021133114A1 (de) 2021-12-14 2023-06-15 Leistritz Pumpen Gmbh Schraubenspindelpumpe

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* Cited by examiner, † Cited by third party
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US2338609A (en) * 1939-05-10 1944-01-04 Pittsburgh Equitable Meter Co Fluid meter
US3269328A (en) * 1964-09-28 1966-08-30 Laval Turbine Screw pumps or motors
US3576379A (en) * 1969-01-27 1971-04-27 James A Parise Portable low-pressure direct current pump
GB0123873D0 (en) * 2001-10-04 2001-11-28 Boc Group Plc Mechanical pumps
DE102005037118B3 (de) 2005-08-03 2007-01-18 Leistritz Ag Mehrfach gelagerte zweiflutige Schraubenspindelpumpe
KR100786591B1 (ko) * 2007-02-05 2007-12-21 박승종 전동기 일체형 스크류 펌프
CN201306277Y (zh) * 2008-12-05 2009-09-09 天津泵业机械集团有限公司 高粘三螺杆泵
DE202010011333U1 (de) * 2009-09-09 2010-10-28 Jung & Co. Gerätebau GmbH Schraubenspindelpumpe mit mehrteiligem Gehäuse
DE202010011626U1 (de) * 2010-08-20 2010-10-21 Hugo Vogelsang Maschinenbau Gmbh Drehkolbenpumpe
KR101837782B1 (ko) * 2010-08-25 2018-03-12 후루카와 산키 시스테무즈 가부시키가이샤 일축 편심 나사 펌프에 있어서의 스테이터 씨일 구조
ES2827448T3 (es) * 2012-03-28 2021-05-21 Circor Pumps North America Llc Sistema y método para monitorización y control de cavitación en bombas de desplazamiento positivo
DE102013101164B4 (de) * 2013-02-06 2016-03-24 Leistritz Pumpen Gmbh Schraubenspindelpumpe
DE102013102031B4 (de) * 2013-03-01 2016-05-12 Netzsch Pumpen & Systeme Gmbh Aus wenigstens zwei Teilen gebildete Schraubenspindelpumpe
DE102014000846A1 (de) * 2014-01-27 2015-07-30 Klaus Union Gmbh & Co. Kg Schraubenspindelpumpe
DE102014102390B3 (de) 2014-02-25 2015-03-26 Leistritz Pumpen Gmbh Schraubenspindelpumpe
BE1022302B1 (nl) * 2014-09-10 2016-03-14 ATLAS COPCO AIRPOWER , naamloze vennootschap Schroefcompressorelement
WO2017009877A1 (fr) * 2015-07-14 2017-01-19 3P Prinz S.R.L. Pompe du type interchangeable
CN105065281B (zh) * 2015-08-05 2017-05-24 同济大学 一种多排气压力螺杆式压缩机
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DE102017112743B3 (de) * 2017-06-09 2018-10-25 Leistritz Pumpen Gmbh Modulares System zur Herstellung einer Schraubenspindelpumpe

Also Published As

Publication number Publication date
US20210123437A1 (en) 2021-04-29
US11319953B2 (en) 2022-05-03
EP3812546A1 (fr) 2021-04-28
CN112696353A (zh) 2021-04-23
ES2956864T3 (es) 2023-12-29
PL3812546T3 (pl) 2023-12-27
DE102019128602B3 (de) 2021-02-11
BR102020019605A2 (pt) 2021-05-04
CN112696353B (zh) 2023-05-23

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