Space double-motor direct-drive type oil-free synchronous double-screw pump

Abstract

The invention relates to the technical field of screw pumps, and provides a space double-motor direct-drive type oil-free synchronous double-screw pump which comprises a pump body, a driver and a detection regulator. The pump body is provided with a first screw rotating shaft and a second screw rotating shaft; the driver comprises a first motor located at the first end of the first screw rotating shaft and a second motor located at the first end of the second screw rotating shaft. The detection regulator comprises a first detection piece fixedly arranged at the second end of the first screw rotating shaft and a second detection piece fixedly arranged at the second end of the second screw rotating shaft; the first detection piece and the second detection piece are respectively connected in series in a detection circuit of the detection regulator; when the first screw rotating shaft and the second screw rotating shaft rotate synchronously, the first detection piece and the second detection piece rotate along with the first screw rotating shaft and the second screw rotating shaft respectively and can be in a non-contact disconnection state continuously. When the first screw rotating shaft and the second screw rotating shaft rotate asynchronously, the first detection piece and the second detection piece rotate along with the first screw rotating shaft and the second screw rotating shaft respectively, and the first detection piece and the second detection piece can be in a contact conduction state.

Description

TECHNICAL FIELD

[0001] The patent relates to the technical field of screw pumps, in particular to a space-used double-motor direct-drive oil-free synchronous double-screw pump. BACKGROUND

[0002] As an important positive displacement fluid machine, the double-screw pump occupies an important position in the industrial fields of aerospace, energy power, petroleum and chemical industry, food and medicine, and semiconductor manufacturing, etc. due to its high conveying efficiency, strong medium adaptability, and small flow pulsation. The core principle is to form a continuous sealed chamber by the rotary motion of two intermeshing screw rotors in the pump cavity to complete the suction, compression and discharge of the medium.

[0003] At present, the conventional double-screw pump still generally adopts a single-motor driving architecture to realize torque transmission and phase coordination of the main screw and the secondary screw through a synchronous gear pair. However, this technical solution has the following outstanding problems: 1. The power distribution is realized by a relatively long mechanical transmission chain, resulting in large energy loss, poor transmission efficiency and synchronization accuracy; 2. The traditional synchronous gear pair needs to be continuously lubricated to reduce wear, which has a certain risk of oil pollution and poor temperature adaptability; 3. Under the single-motor driving mode, the load distribution of the main / secondary screw rotor shaft is uneven, which is easy to produce torque fluctuation, aggravate bearing wear, and affect the service life and operation stability of the equipment.

[0004] Therefore, there is an urgent need for a new type of double-screw pump on the market to solve the above problems existing in the related art. SUMMARY

[0005] The embodiments of the present disclosure provide a space-used double-motor direct-drive oil-free synchronous double-screw pump to solve the problems of poor transmission efficiency and synchronization accuracy, the need for continuous lubrication and the risk of oil pollution, and the easy production of torque fluctuation affecting the service life and operation stability of the screw pump in the related art.

[0006] The space-used double-motor direct-drive oil-free synchronous double-screw pump provided by the embodiments of the present disclosure comprises a pump body, a driver and a detection regulator.

[0007] The pump body has a first screw rotating shaft and a second screw rotating shaft arranged in cooperation with each other;

[0008] The driver comprises a first motor arranged at the first end of the first screw rotating shaft and a second motor arranged at the first end of the second screw rotating shaft, and the first motor and the second motor are used to directly drive the first screw rotating shaft and the second screw rotating shaft to rotate synchronously, respectively.

[0009] The detection regulator comprises a first detection member fixedly arranged at the second end of the first screw rotating shaft and a second detection member fixedly arranged at the second end of the second screw rotating shaft.

[0010] The first detection member and the second detection member are respectively arranged in series in a detection circuit of the detection regulator.

[0011] When the first screw shaft and the second screw shaft rotate synchronously, the first detection member and the second detection member rotate synchronously, and the two can be in a non-contact disconnected state.

[0012] When the first screw shaft and the second screw shaft rotate asynchronously, the first detection member and the second detection member rotate asynchronously, and the two can be in a contact connected state.

[0013] In an embodiment, the first detection member is a first detection gear sleeved on the second end of the first screw shaft.

[0014] The second detection member is a second detection gear sleeved on the second end of the second screw shaft, and the first detection gear and the second detection gear are arranged in correspondence with each other and are spaced apart.

[0015] In an embodiment, the first screw shaft and the second screw shaft have a dynamic meshing gap A1 therebetween.

[0016] The first detection gear and the second detection gear have a safety gap A2 therebetween, and the safety gap A2 is smaller than the dynamic meshing gap A1.

[0017] In an embodiment, the detection regulator further comprises a wave-shaped gasket and an oil slinger.

[0018] The wave-shaped gasket and the oil slinger are arranged at the second end of the first screw shaft and the second end of the second screw shaft respectively, and the wave-shaped gasket and the oil slinger are located on both sides of the first detection gear and the second detection gear respectively.

[0019] In an embodiment, the detection regulator further comprises a sensing controller.

[0020] The sensing controller is arranged in the detection circuit and is electrically connected to the driver.

[0021] The sensing controller can detect a current signal in the detection circuit and compensate and control the output power of the driver according to the current signal.

[0022] In an embodiment, the first motor and the second motor are both permanent magnet synchronous motors.

[0023] The driver further comprises a mounting end cover arranged at one end of the pump body.

[0024] The mounting end cover respectively seals the first motor and the second motor in the pump body.

[0025] In an implementation, the permanent magnet synchronous motor includes a motor stator and a motor rotor.

[0026] The motor rotor is fixed around the first end of the first screw shaft and the first end of the second screw shaft through a connecting key and a shaft end fastening pin.

[0027] The motor stator is arranged on the inner circumferential wall of the mounting end cover and is arranged in correspondence with the motor stator.

[0028] In an implementation, the first screw shaft and the second screw shaft are respectively sleeved with an air seal sleeve, an axial seal and a mounting bearing in sequence in the shaft section close to the driver.

[0029] In an implementation, the pump body is further provided with an inlet joint and a discharge joint in the body wall, which are in communication with the inner cavity of the pump body.

[0030] In an implementation, the space dual-motor direct-drive oil-free synchronous double-screw pump further includes a heat dissipation fan arranged at one end of the pump body.

[0031] Compared with the related art, the technical scheme provided by the embodiments of the present disclosure has the following advantages:

[0032] The space dual-motor direct-drive oil-free synchronous double-screw pump provided by the embodiments of the present disclosure can at least achieve the following beneficial effects:

[0033] 1. The first screw shaft and the second screw shaft are directly and synchronously driven by the dual-motor parallel connection, which changes the driving mode of the traditional double-screw pump “single motor + mechanical transmission chain”, can realize greater output power and higher output synchronization accuracy, and can also simplify and shorten the mechanical transmission chain and improve the transmission efficiency.

[0034] 2. The non-contact detection regulator is used to detect the rotation synchronization of the first screw shaft and the second screw shaft in real time, ensuring the stability and reliability of the operation process.

[0035] 3. The first detection member in the detection regulator and the first detection member operate non-contact, which is only used for detecting the synchronization accuracy and does not participate in the transmission torque of the first screw shaft and the second screw shaft, completely avoiding the risk of metal friction, and does not need to use lubricating oil and sealing devices, completely avoiding oil and gas pollution and lubricating oil temperature limitation, and is especially suitable for high-end high-precision fields with high cleanliness requirements, such as medical equipment, precision instruments, food processing, aerospace (especially suitable for space vacuum environment where lubricating oil cannot be used), semiconductors and other harsh working conditions.

[0036] It should be understood that the contents described in this section are not intended to identify key or essential features of the embodiments of the present disclosure, nor are they used to limit the scope of the present disclosure. Other features of the present disclosure will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0037] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which:

[0038] In the drawings, identical or corresponding reference numerals indicate identical or corresponding parts.

[0039] Figure 1 A vertical sectional view of a space-use double-motor direct-drive oil-free synchronous double-screw pump according to an embodiment of the present disclosure is shown;

[0040] Figure 2 A partial structural view of a space-use double-motor direct-drive oil-free synchronous double-screw pump according to an embodiment of the present disclosure is shown;

[0041] Figure 3 A schematic view of a space-use double-motor direct-drive oil-free synchronous double-screw pump according to an embodiment of the present disclosure is shown;

[0042] Figure 4 A perspective structural view of a space-use double-motor direct-drive oil-free synchronous double-screw pump according to an embodiment of the present disclosure is shown;

[0043] Figure 5 An exploded view of a space-use double-motor direct-drive oil-free synchronous double-screw pump according to an embodiment of the present disclosure is shown.

[0044] Reference numerals in the drawings: 1, pump body; 11, first screw shaft; 12, second screw shaft; 101, gas seal bushing; 102, axial seal; 103, mounting bearing; 104, inlet joint; 105, discharge joint; 2, driver; 21, first motor; 22, second motor; 23, mounting end cover; 201, motor stator; 202, motor rotor; 203, connecting key; 204, shaft end fastening peg; 3, detection regulator; 31, first detection member; 32, second detection member; 33, wave gasket; 34, oil slinger; 4, cooling fan. DETAILED DESCRIPTION

[0045] In order to make the purposes, characteristics and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present disclosure.

[0046] The embodiments of the present disclosure will be described in detail below with reference to the drawings.

[0047] In combination with Figure 1 and Figure 2 As shown in the figure, the embodiments of the present disclosure provide a space-used double-motor direct-drive oil-free synchronous double-screw pump, which comprises a pump body 1, a driver 2 and a detection regulator 3; the pump body 1 has a first screw shaft 11 and a second screw shaft 12 arranged in cooperation with each other; the driver 2 comprises a first motor 21 arranged at the first end of the first screw shaft 11 and a second motor 22 arranged at the first end of the second screw shaft 12, and the first motor 21 and the second motor 22 are used to directly drive the first screw shaft 11 and the second screw shaft 12 to rotate synchronously, respectively; the detection regulator 3 comprises a first detection piece 31 fixedly arranged at the second end of the first screw shaft 11 and a second detection piece 32 fixedly arranged at the second end of the second screw shaft 12.

[0048] Among them, the first detection piece 31 and the second detection piece 32 are respectively arranged in series in the detection circuit of the detection regulator 3; when the first screw shaft 11 and the second screw shaft 12 rotate synchronously, the first detection piece 31 and the second detection piece 32 rotate accordingly, and the two can continuously be in a non-contact open state; when the first screw shaft 11 and the second screw shaft 12 rotate asynchronously, the first detection piece 31 and the second detection piece 32 rotate accordingly, and the two can appear in a contact closed state.

[0049] The space-used double-motor direct-drive oil-free synchronous double-screw pump provided by the embodiments of the present disclosure can be specifically but not limitedly applied to pumping of liquid or gaseous medium in some high-end fields with high cleanliness requirements, such as aerospace, semiconductor, medical equipment, fine chemical industry, food industry, etc.

[0050] The space dual-motor direct-drive oil-free synchronous double screw pump, in specific use, the first screw shaft 11 and the second screw shaft 12 in the pump body 1 can be directly driven synchronously by the first motor 21 and the second motor 22 in the driver 2, and the first motor 21 and the second motor 22 can be set as permanent magnet synchronous motors, two permanent magnet synchronous motors directly and independently drive the first screw shaft 11 and the second screw shaft 12, and through the precise control of the electrical control system in the permanent magnet synchronous motor, the rotation synchronization of the first screw shaft 11 and the second screw shaft 12 and the high-precision meshing of the thread grooves are ensured. The specific setting mode of the above-mentioned driver 2 can change the traditional “single motor + mechanical transmission chain (single motor → coupling → male screw shaft → synchronous gear pair → female screw shaft)” driving mode, directly realize the double-motor parallel synchronous direct drive of the first screw shaft 11 and the second screw shaft 12, realize larger power and higher precision synchronous drive, and at the same time, simplify the mechanical transmission chain of the space dual-motor direct-drive oil-free synchronous double screw pump and improve the transmission efficiency.

[0051] In addition, the space dual-motor direct-drive oil-free synchronous double screw pump is also provided with a detection regulator 3, and the first detection part 31 and the second detection part 32 in the detection regulator 3 are respectively fixedly arranged at the second end of the first screw shaft 11 and the second end of the second screw shaft 12. In this way, when the first screw shaft 11 and the second screw shaft 12 rotate synchronously, the first detection part 31 and the second detection part 32 rotate synchronously. Since the first detection part 31 and the second detection part 32 can be continuously in a non-contact disconnected state, no current signal is output in the detection circuit in the detection regulator 3, so as to represent that the first screw shaft 11 and the second screw shaft 12 maintain normal rotation synchronization during operation. If the first detection part 31 and the second detection part 32 appear a short contact state, there is a short current signal output in the detection circuit, so as to represent that the first screw shaft 11 and the second screw shaft 122 appear a non-synchronous rotation deviation during operation. At this time, the detection regulator 3 can be triggered and the abnormal working state of the space dual-motor direct-drive oil-free synchronous double screw pump appears a non-synchronous rotation.

[0052] Moreover, the first detection member 31 and the second detection member 32 in the detection regulator 3 are in a non-contact interval state in the normal operation state, the first detection member 31 and the second detection member 32 are only used as non-contact “synchronous detectors” of the first screw shaft 11 and the second screw shaft 12, do not participate in the transmission of torque of the first screw shaft 11 and the second screw shaft 12, and a safety gap is reserved between the first detection member 31 and the second detection member 32 in normal use, so that the metal friction risk and the friction heat accumulation effect are completely avoided when the first detection member 31 and the second detection member 32 rotate synchronously with the first screw shaft 11 and the second screw shaft 12, and the demand for lubricating oil is completely eliminated, thereby avoiding the oil medium pollution and the lubricating oil related failure risk, and effectively expanding the applicability of the space dual-motor direct-drive oil-free synchronous double-screw pump in a wide temperature range and harsh working conditions, and meeting the higher requirements of cleanliness, efficiency and reliability in high-end fields, especially suitable for medical equipment, precision instruments, food processing, aerospace (especially suitable for space vacuum environment where lubricating oil cannot be used), semiconductors and other harsh conditions.

[0053] In summary, compared with the single-motor driving mode of the double-screw pump in the prior art, the space dual-motor direct-drive oil-free synchronous double-screw pump provided by the embodiment of the present disclosure can at least achieve the following

[0054] Beneficial effects:

[0055] 1. The double-motor parallel mode is used to directly and synchronously drive the first screw shaft 11 and the second screw shaft 12, the driving mode of “single motor + mechanical transmission chain” in the traditional double-screw pump is changed, greater output power and higher output synchronization accuracy can be achieved, and the mechanical transmission chain can be simplified and shortened, and the transmission efficiency can be improved;

[0056] 2. The non-contact detection regulator 3 is used to detect the rotation synchronization of the first screw shaft 11 and the second screw shaft 12 in real time, and ensure the stability and reliability of the operation process;

[0057] 3. The first detection member 31 and the second detection member 32 in the detection regulator 3 are in a non-contact operation state, only used for detecting the synchronization accuracy, do not participate in the transmission of torque of the first screw shaft 11 and the second screw shaft 12, completely avoid the metal friction risk, and do not need to use lubricating oil and sealing devices, completely avoid oil and gas pollution and lubricating oil temperature limitation, especially suitable for high-end high-precision fields with high cleanliness requirements and without oil, such as medical equipment, precision instruments, food processing, aerospace (especially suitable for space vacuum environment where lubricating oil cannot be used), semiconductors and other harsh conditions.

[0058] In an embodiment, the first detection member 31 is a first detection gear sleeved on the second end of the first screw shaft 11, and the second detection member 32 is a second detection gear sleeved on the second end of the second screw shaft 12, and the first detection gear and the second detection gear are arranged in correspondence with each other in parallel and at intervals.

[0059] Specifically, in combination with Figure 1 and Figure 2 In detail, the first detection member 31 is specifically arranged as a first detection gear sleeved on the second end of the first screw shaft 11, and the second detection member 32 is specifically arranged as a second detection gear sleeved on the second end of the second screw shaft 12, and the first detection gear and the second detection gear can both be arranged as involute gears. In this way, when the first detection gear and the second detection gear are arranged in correspondence with each other in parallel and at intervals, they will not contact and will not transmit any torque, and in the process of synchronous rotation of the first detection gear and the second detection gear, the two teeth closest to each other can have a meshing distance to correspond to form a “preset safety gap”, so that the detection circuit cannot form a closed conductive loop and no current signal is output. If when the first screw shaft 11 and the second screw shaft 12 appear non-synchronous rotation deviation, the two teeth closest to each other in the corresponding rotation process of the first detection gear and the second detection gear will temporarily contact, so that the detection circuit temporarily forms a closed conductive loop and a short-term periodic current signal output appears.

[0060] The specific arrangement of the first detection member 31 and the second detection member 32 has the beneficial effects of simple structure and being able to sensitively detect the synchronous rotation state of the first screw shaft 11 and the second screw shaft 12.

[0061] In an embodiment, the first screw shaft 11 and the second screw shaft 12 have a dynamic meshing gap A1 therebetween, and the first detection gear and the second detection gear have a safety gap A2 therebetween, and the safety gap A2 is smaller than the dynamic meshing gap A1.

[0062] Specifically, in combination with Figure 2Further detailed description, the safety gap A2 between the first detection gear and the second detection gear is set to be less than the dynamic meshing gap A1 between the first screw shaft 11 and the second screw shaft 12, which can be specifically set as A2=0.1mm, A1=0.1mm+0.08mm. In this way, when the first screw shaft 11 or the second screw shaft 12 in the double-motor direct-drive oil-free synchronous double-screw pump is subjected to load impact and generates radial displacement, the dynamic meshing gap A2=0.1mm between the first detection gear and the second detection gear will be triggered to instantaneously meshing contact, and the detection regulator 3 can form mechanical and electrical limiting protection (displacement suppression amount Δr≤0.08mm), while the A2 value is less than the dynamic meshing gap A1, so that the first screw shaft 11 and the second screw shaft 12 can always maintain a non-contact operating state before triggering protection, completely avoiding the risk of metal friction of the first screw shaft 11 and the second screw shaft 12.

[0063] In an implementable manner, the detection regulator 3 further comprises a wave-shaped gasket 33 and an oil slinger 34; the wave-shaped gasket 33 and the oil slinger 34 are respectively arranged at the second end of the first screw shaft 11 and the second end of the second screw shaft 12, and the wave-shaped gasket 33 and the oil slinger 34 are respectively located on the two sides of the first detection gear and the second detection gear.

[0064] Specifically, in combination with Figure 2 Further detailed description, the wave-shaped gasket 33 and the oil slinger 34 are further arranged in the detection regulator 3, and the wave-shaped gasket 33 and the oil slinger 34 are respectively located on the two sides of the first detection gear and the second detection gear, so that the wave-shaped gasket 33 can effectively compensate for the slight deformation caused by temperature changes or mechanical stress, ensuring reliable fitting of the sealing surface; and the oil slinger 34 prevents external lubricating oil from entering the inner cavity of the pump body 1, ensuring an oil-free operating environment inside the pump body 1.

[0065] In an implementable manner, the detection regulator 3 further comprises a sensing controller; the sensing controller is arranged in the detection circuit and is electrically connected with the driver 2; wherein the sensing controller can detect the current signal in the detection circuit and compensate and control the output power of the driver 2 according to the current signal.

[0066] Specifically, when the radial displacement deviation caused by external load impact exceeds A2, the detection circuit in the detection regulator 3 is correspondingly closed, and the sensing controller in the detection regulator 3 can realize binary detection of displacement deviation with a precision of ±0.1mm according to the current on-off signal of the detection circuit. In addition, the sensing controller can also synchronously trigger the current threshold protection mechanism and the motor dynamic torque compensation algorithm, realize zero-torque transmission of the first detection gear and the second detection gear, and establish a mechatronic collaborative safety protection system, thereby realizing the function of limiting the displacement of the first screw shaft 11 and the second screw shaft 12.

[0067] In an embodiment, the first motor 21 and the second motor 22 are both permanent magnet synchronous motors; the driver 2 further comprises a mounting end cover 23 covering one end of the pump body 1; the mounting end cover 23 respectively seals and covers the first motor 21 and the second motor 22 in the pump body 1.

[0068] Specifically, in combination with Figure 1 and Figure 3 Further detailed description, the first motor 21 and the second motor 22 are both set as permanent magnet synchronous motors, and the two permanent magnet synchronous motors can respectively independently drive the first screw shaft 11 and the second screw shaft 12, so that the synchronization consistency of the output rotation speed and the output rotation angle of the two can be accurately controlled through the electrical control system in the permanent magnet synchronous motor, and the synchronous operation of the two screws can be reliably realized, and the high-precision meshing between the first screw shaft 11 and the second screw shaft 12 is ensured.

[0069] And the first motor 21 and the second motor 22 are sealed and covered in the pump body 1 through the mounting end cover 23, so that the compactness of the structure of the space double-motor direct-drive oil-free synchronous double-screw pump can be greatly improved, and the assembly link is reduced, which means that the assembly accuracy is indirectly improved, and the failure rate is reduced.

[0070] In an embodiment, the permanent magnet synchronous motor comprises a motor stator 201 and a motor rotor 202; the motor rotor 202 is fixed around the first end of the first screw shaft 11 and the first end of the second screw shaft 12 through a connecting key 203 and a shaft end fastening nail 204; the motor stator 201 is arranged on the inner circumferential wall of the mounting end cover 23 and is correspondingly arranged with the motor stator 201.

[0071] Specifically, in combination with Figure 1 and Figure 3 Further detailed description, the motor stator 201 in the permanent magnet synchronous motor is directly arranged on the inner circumferential wall of the mounting end cover 23, and the motor rotor 202 in the permanent magnet synchronous motor is correspondingly fixed on the first end of the first screw shaft 11 and the first end of the second screw shaft 12, so that the motor rotor 202 and the first screw shaft 11 and the second screw shaft 12 can be rigidly connected with zero gap, and the strategy of “pre-assembly of the motor rotor 202- cooperative positioning of the motor stator 201” can be used during assembly, the rigid assembly of the permanent magnet synchronous motor and the first screw shaft 11 and the second screw shaft 12 is completed first, and then the integrated motor stator 201 is installed in position as a whole, so as to ensure that the meshing gap between the first screw shaft 11 and the second screw shaft 12 can be accurately controlled within 0.2mm, and the complete synchronous operation of the two without phase lag can be realized.

[0072] In an embodiment, the first screw shaft 11 and the second screw shaft 12 are further sleeved with a gas seal sleeve 101, an axial seal 102 and a mounting bearing 103 in sequence in the shaft section close to the driver 2.

[0073] Specifically, in combination with Figure 2 In further detail, the first screw shaft 11 and the second screw shaft 12 are further sleeved with the gas seal sleeve 101 and the axial seal 102 in sequence in the shaft section close to the driver 2, so that the working chamber inside the pump body 1 can be effectively isolated from the external environment by the gas seal sleeve 101 and the axial seal 102, and gas leakage is prevented, thereby ensuring the high pumping efficiency and internal cleanliness of the space-use double-motor direct-drive oil-free synchronous double-screw pump.

[0074] In addition, the first screw shaft 11 and the second screw shaft 12 are further sleeved with the mounting bearing 103 in the shaft section close to the driver 2, and the mounting bearing 103 can be specifically but not limited to an angular contact ball bearing and a deep groove ball bearing, so that the first screw shaft 11 and the second screw shaft 12 can be provided with efficient and accurate rotary support by the mounting bearing 103, and the space-use double-motor direct-drive oil-free synchronous double-screw pump can run smoothly and stably for a long time under high load and high speed conditions.

[0075] In an embodiment, the body wall of the pump body 1 is further provided with an inlet joint 104 and a discharge joint 105 in communication with the inner cavity of the pump body 1.

[0076] Specifically, in combination with Figure 4 and Figure 5 In further detail, the body wall of the pump body 1 can be provided with a gas inlet channel and a gas outlet channel, so that the inlet joint 104 and the discharge joint 105 can be respectively installed in the gas inlet channel and the gas outlet channel through sealing butt joint, and the inlet joint 104 and the discharge joint 105 can be connected with external gas lines, thereby enabling the space-use double-motor direct-drive oil-free synchronous double-screw pump to efficiently introduce the required processing gas and efficiently discharge the gas inside the pump body 1, so as to meet the flow and pressure working requirements inside the space-use double-motor direct-drive oil-free synchronous double-screw pump.

[0077] In an embodiment, the space-use double-motor direct-drive oil-free synchronous double-screw pump further comprises a cooling fan 4 arranged at one end of the pump body 1.

[0078] Specifically, in combination with Figure 4 and Figure 5 In further detail, the cooling fan 4 can be arranged along the length direction of the oil-free synchronous double-screw pump and towards the pump body 1, so that the cooling fan 4 can blow cooling air flow towards the pump body 1 to ensure the stability of the internal temperature of the pump body 1.

[0079] Of course, the space can also be used according to the actual use of the double-motor direct-drive oil-free synchronous double-screw pump, and the water cooling device is matched for additional heat dissipation, so as to fully ensure that the internal temperature of the space used by the double-motor direct-drive oil-free synchronous double-screw pump during actual work can be in the best range.

[0080] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0081] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present disclosure, which should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A space-use dual-motor direct-drive oilless synchronous twin-screw pump, characterized in that, include: Pump body (1), wherein the pump body (1) has a first screw shaft (11) and a second screw shaft (12) that are configured to cooperate with each other; The driver (2) includes a first motor (21) disposed at the first end of the first screw shaft (11) and a second motor (22) disposed at the first end of the second screw shaft (12), and the first motor (21) and the second motor (22) are used to directly drive the first screw shaft (11) and the second screw shaft (12) to rotate synchronously respectively; The detection regulator (3) includes a first detection element (31) fixedly disposed at the second end of the first screw shaft (11) and a second detection element (32) fixedly disposed at the second end of the second screw shaft (12); The first detection element (31) and the second detection element (32) are respectively connected in series in the detection circuit of the detection regulator (3); When the first screw shaft (11) and the second screw shaft (12) rotate synchronously, the first detection element (31) and the second detection element (32) rotate accordingly, and the two can remain in a non-contact disconnected state. When the first screw shaft (11) and the second screw shaft (12) rotate asynchronously, the first detection element (31) and the second detection element (32) rotate accordingly, and the two can reach a contact and conduction state.

2. The space-use dual-motor direct-drive oilless synchronous twin-screw pump according to claim 1, characterized in that, The first detection component (31) is a first detection gear sleeved on the second end of the first screw shaft (11); The second detection element (32) is a second detection gear sleeved on the second end of the second screw shaft (12), and the first detection gear and the second detection gear are aligned and spaced apart.

3. The space-use dual-motor direct-drive oilless synchronous twin-screw pump according to claim 2, characterized in that, The first screw shaft (11) and the second screw shaft (12) have a dynamic meshing clearance A1; There is a safety clearance A2 between the first detection gear and the second detection gear, and the safety clearance A2 is smaller than the dynamic meshing clearance A1.

4. The space-use dual-motor direct-drive oilless synchronous twin-screw pump according to claim 2, characterized in that, The detection regulator (3) also includes a waveform shim (33) and an oil slinger ring (34); The wave-shaped gasket (33) and the oil slinger ring (34) are respectively disposed at the second end of the first screw shaft (11) and the second end of the second screw shaft (12), and the wave-shaped gasket (33) and the oil slinger ring (34) are respectively located on both sides of the first detection gear and the second detection gear.

5. The space-use dual-motor direct-drive oilless synchronous twin-screw pump according to claim 1, characterized in that, The detection regulator (3) also includes a sensor controller; The sensor controller is located in the detection circuit and is electrically connected to the driver (2); The sensor controller can detect the current signal in the detection circuit and adjust the output power of the driver (2) accordingly based on the current signal.

6. The space-use dual-motor direct-drive oilless synchronous twin-screw pump according to claim 1, characterized in that, Both the first motor (21) and the second motor (22) are permanent magnet synchronous motors; The driver (2) also includes a mounting end cap (23) covering one end of the pump body (1); The mounting end cap (23) respectively seals the first motor (21) and the second motor (22) in the pump body (1).

7. The space-use dual-motor direct-drive oilless synchronous twin-screw pump according to claim 6, characterized in that, The permanent magnet synchronous motor includes a motor stator (201) and a motor rotor (202); The motor rotor (202) is fixedly wound around the first end of the first screw shaft (11) and the first end of the second screw shaft (12) by a connecting key (203) and a shaft end fastening nail (204); The motor stator (201) is disposed on the inner peripheral wall of the mounting end cover (23) and is disposed at intervals corresponding to the motor stator (201).

8. The space-use dual-motor direct-drive oilless synchronous twin-screw pump according to claim 1, characterized in that, The first screw shaft (11) and the second screw shaft (12) are respectively fitted with an air-sealed bushing (101), an axial seal (102) and a mounting bearing (103) in the shaft sections near the driver (2).

9. The space-use dual-motor direct-drive oilless synchronous twin-screw pump according to claim 1, characterized in that, The pump body (1) is also provided with an inlet connector (104) and an outlet connector (105) that communicate with the inner cavity of the pump body (1).

10. The space-use dual-motor direct-drive oilless synchronous twin-screw pump according to claim 1, characterized in that, The space-use dual-motor direct-drive oilless synchronous twin-screw pump also includes a cooling fan (4) located at one end of the pump body (1).

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