Wear-resistant oscillating rotor pump

Abstract

The application belongs to the field of pump equipment, and relates to a wear-resistant swing rotor pump. The swing rotor pump comprises a pump body, a main shaft accommodated in the pump body, a front rotor cavity and a rear rotor cavity arranged in the pump body, swing rotor parts arranged in the front and rear rotor cavities and connected with the main shaft. In the use process, most of the impurity particles are taken away with the medium in the crescent-shaped working cavity. Even if the rotor ring or the cylinder is scratched, the damage at a certain position only affects the sealing performance of the angle, and does not affect the sealing of the next angle. The wear resistance of the pump body is improved. Meanwhile, the left-right symmetrical double-cylinder four-cavity structure is adopted, the volume is expanded, the axial forces acting on the rotor ring are offset, the gap between the cylinder and the rotor ring and the gap between the rotor ring and the center cylinder are all 0.02mm-0.04mm, the friction between the cylinder and the rotor ring is avoided, and the long-term use effect of the pump is ensured.

Description

Technical Field

[0001] This invention belongs to the field of pump equipment, and particularly relates to a wear-resistant oscillating rotor pump. Background Technology

[0002] A rotary lobe pump is a positive displacement pump, mainly composed of a pump body, a rotary lobe rotor, and a drive shaft. Its working principle involves the rotary lobe rotor oscillating within the pump body, creating a variable sealed chamber to achieve liquid intake and discharge. Compared to other types of pumps, rotary lobe pumps have advantages such as compact structure, strong self-priming capability, uniform flow rate, and strong adaptability to various media, and are widely used in numerous fields including petroleum, chemical, food, and pharmaceutical industries.

[0003] In many industrial applications, the media transported by rotary lobe pumps contain fine particles, which cause severe wear on the pump's flow-through components. For example, in the oil extraction industry, the crude oil being transported may contain impurities such as particles, which also cause wear on the pump. Under such operating conditions, ordinary rotary lobe pumps are prone to wear on components such as the rotor and pump body. This wear leads to an increase in the clearance between the rotor and pump body, thereby increasing internal leakage and reducing the pump's volumetric efficiency.

[0004] In addition, uneven wear can also cause the rotor to oscillate unevenly, generating vibration and noise, affecting the stability and reliability of the pump, and further affecting the continuity and stability of industrial production.

[0005] To ensure the continuity and stability of pumps in industrial production and improve production efficiency, this invention provides a wear-resistant oscillating rotor pump to reduce the impact of wear on pump performance. Summary of the Invention

[0006] In view of the above problems, this application provides a wear-resistant oscillating rotor pump. The pump has a large working chamber volume, and most impurity particles are carried away by the medium in the crescent-shaped working chamber. Even if hard particles are squeezed into the sealing line, causing scratches on the rotor ring or cylinder, the sealing lines formed by the rotor ring and cylinder, as well as the rotor ring and central cylinder, are line-to-line. Damage at one point will only affect the sealing performance at that angle and will not affect the sealing at the next angle, effectively improving the wear resistance of the pump body. At the same time, the symmetrical double-cylinder four-chamber structure expands the volume and cancels out the axial forces acting on the rotor ring. While ensuring that the gap between the cylinder and rotor ring and the gap between the rotor ring and central cylinder are both 0.02mm-0.04mm, friction between the cylinder and rotor ring can be avoided, and the sealing gap can be maintained for a long time, ensuring the long-term performance of the pump body.

[0007] To achieve the above objectives, the present application provides the following technical solution: a wear-resistant oscillating rotor pump, comprising a pump body and a main shaft housed inside the pump body. The pump body is provided with a front rotor cavity and a rear rotor cavity, and an oscillating rotor portion is provided inside both the front rotor cavity and the rear rotor cavity. The oscillating rotor portion is provided inside the corresponding rotor cavity and connected to the main shaft. A rotor support cavity is also provided inside the pump body between the front rotor cavity and the rear rotor cavity. A rotor support sleeve is provided inside the rotor support cavity, and the rotor support sleeve is connected to the oscillating rotor portions on both sides.

[0008] The outer wall of the main shaft located in the rotor support cavity is connected to an eccentric wheel sleeve by a key, and the outer wall of the eccentric wheel sleeve is connected to the rotor support sleeve by a sleeved roller bearing.

[0009] The swing rotor unit includes a rotor ring sleeve connected to a rotor support sleeve by screws. The rotor ring sleeve is disposed inside the corresponding rotor cavity. A central cylinder is disposed inside the rotor ring sleeve. The inner wall of the central cylinder is connected to the main shaft at a corresponding position by a bearing. A spacer sleeve is also nested inside the inner wall of the central cylinder. The main shaft and the pump body are connected by a bearing seat and a roller bearing. A partition plate is connected to the upper end of the central cylinder. The partition plate is snapped onto the pump body. A through groove is opened on the rotor ring sleeve at the position corresponding to the partition plate. The partition plate divides the corresponding rotor cavity into working cavity M and working cavity N.

[0010] According to an advantageous embodiment, the pump body includes an inlet / outlet assembly, a front cylinder, a rear cylinder, and a cylinder spacer; a cylinder spacer is provided between the front cylinder and the rear cylinder, and the cylinder spacer is sealed to both the front cylinder and the rear cylinder by gaskets; the upper ends of the front cylinder, the rear cylinder, and the cylinder spacer are respectively connected to the inlet / outlet assembly by bolts.

[0011] According to an advantageous embodiment, the front rotor cavity is disposed inside the front cylinder block, the rear rotor cavity is disposed inside the rear cylinder block, and the sealing gap between the rotor ring and the corresponding rotor cavity is 0.02mm-0.04mm.

[0012] According to an advantageous embodiment, the central cylinder corresponding to the rear rotor cavity is mounted on the rear cylinder block by screws, and the central cylinder corresponding to the front rotor cavity is mounted on the front cylinder block by screws. One end of the spacer sleeve abuts against the outer ring of the bearing inside the central cylinder, and the bearing seats corresponding to the front and rear cylinder blocks are connected by screws.

[0013] According to an advantageous embodiment, the upper end of the rotor support sleeve is provided with a lug extending along its axial direction, and a guide core is hinged inside the lug. The upper end of the cylinder spacer is provided with a guide groove for the guide core to move up and down, and an elastic sealing gasket is provided between the guide core and the guide groove.

[0014] According to an advantageous embodiment, the main shaft passes through the corresponding front cylinder and rear cylinder respectively at both ends. The portions of the main shaft located on the outside of the front cylinder and the rear cylinder are respectively connected by keys to provide counterweights. A protective cover is also provided on the outside of the counterweight located in the rear cylinder. The protective cover is installed on the outer wall of the rear cylinder by screws.

[0015] According to an advantageous embodiment, the centers of gravity of the two counterweights are on the same straight line and parallel to the axis of the main shaft. The centers of gravity of the two counterweights and the center of gravity of the eccentric wheel sleeve are in the same plane, and the centers of gravity of the counterweights and the center of gravity of the eccentric wheel sleeve are symmetrically distributed on both sides of the axis of the main shaft.

[0016] According to an advantageous embodiment, the inlet and outlet assembly is provided with an observation chamber, and the observation chamber is provided with two slots, one of which is connected to the suction port and the other is connected to the discharge port. The observation chamber is provided with a cover outside by bolts and washers.

[0017] According to an advantageous embodiment, the lower ends of the front cylinder block, the rear cylinder block, and the cylinder block spacer are all provided with oil drain ports, and oil drain bolts are provided at the positions of the oil drain ports.

[0018] Compared with the prior art, the wear-resistant oscillating rotor pump provided in this embodiment of the invention has the following beneficial effects:

[0019] 1. During operation, most impurity particles are carried away by the medium in the crescent-shaped working chamber. Even if hard particles happen to squeeze into the sealing line and cause scratches to the rotor ring or cylinder, since the sealing lines formed by the rotor ring and cylinder and the central cylinder are line-to-line, damage at a certain point will only affect the sealing performance at that angle and will not affect the sealing at the next angle, thus effectively improving the wear resistance of the pump body.

[0020] 2. Both the second working chamber and the first working chamber of the present invention are constantly changing, and the change of the working chamber makes the changes of the intake volume and discharge volume of the medium tend to be consistent, thereby ensuring the balance of the output flow.

[0021] 3. The pump of this invention adopts a symmetrical double-cylinder four-chamber structure, which expands the working chamber volume and makes the axial forces acting on the rotor ring cancel each other out. While ensuring that the gap between the cylinder body and the rotor ring is 0.02mm to 0.04mm, it can avoid friction between the cylinder body and the rotor ring and maintain this sealing gap for a long time, thus ensuring the long-term performance of the pump body. Attached Figure Description

[0022] Figure 1 This is a partial sectional view of the main view portion of the structure of the present invention.

[0023] Figure 2This is the front view of the present invention.

[0024] Figure 3 For the present invention Figure 2 AA-shaped section view.

[0025] Figure 4 This is a half-sectional view of the front rotor cavity position of the present invention.

[0026] Figure 5 This is a side view sectional view of the present invention.

[0027] The attached diagram shows the following labels: 1. Pump body; 2. Main shaft; 3. Swinging rotor section; 31. Rotor ring sleeve; 32. Central cylinder; 33. Spacer sleeve; 34. Bearing seat; 35. Partition plate; 36. Through groove; M. Working chamber two; N. Working chamber one; 101. Front rotor chamber; 102. Rear rotor chamber; 103. Rotor support chamber; 131. Rotor support sleeve; 132. Lug seat; 133. Guide core; 21. Eccentric wheel sleeve; 22. Counterweight block; 23. Protective cover; 11. Discharge assembly; 12. Front cylinder; 13. Rear cylinder; 14. Cylinder spacer sleeve; 15. Oil unloading bolt; 111. Suction port; 112. Discharge port; 113. Observation chamber; 114. Chamber cover; 141. Guide groove. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0029] Please see Figure 1 A wear-resistant oscillating rotor pump includes a pump body 1 and a main shaft 2 housed inside the pump body 1. The pump body 1 is provided with a front rotor cavity 101 and a rear rotor cavity 102. Oscillating rotor parts 3 are provided inside both the front rotor cavity 101 and the rear rotor cavity 102. The oscillating rotor parts 3 are provided inside the corresponding rotor cavities and connected to the main shaft 2. A rotor support cavity 103 is also provided inside the pump body 1 between the front rotor cavity 101 and the rear rotor cavity 102. A rotor support sleeve 131 is provided inside the rotor support cavity 103 and is connected to the oscillating rotor parts 3 on both sides.

[0030] During operation, the suction pipe and the discharge pipe are manually sealed and connected to the interface of the pump body 1. Then, an external motor is connected to the main shaft 2. With the existing base, the rotor pump and the motor axis are kept on the same plane. The motor drives the main shaft 2 to rotate, and the main shaft 2 drives the swing rotor 3 to work. The swing rotor 3 realizes the pumping of the medium.

[0031] Please refer to the following: Figure 1 and Figure 2The pump body 1 includes an inlet / outlet assembly 11, a front cylinder 12, a rear cylinder 13, and a cylinder spacer 14; the cylinder spacer 14 is provided between the front cylinder 12 and the rear cylinder 13, and the cylinder spacer 14 is sealed to both the front cylinder 12 and the rear cylinder 13 by gaskets; the upper ends of the front cylinder 12, the rear cylinder 13, and the cylinder spacer 14 are respectively connected to the inlet / outlet assembly 11 by bolts.

[0032] Please refer to the following: Figure 3 and Figure 4 The swing rotor 3 includes a rotor ring 31 connected to the rotor support sleeve 131 by screws. The rotor ring 31 is disposed inside the corresponding rotor cavity. A central cylinder 32 is disposed inside the rotor ring 31. The inner wall of the central cylinder 32 is connected to the main shaft 2 at the corresponding position by a bearing. A spacer sleeve 33 is also nested inside the inner wall of the central cylinder 32.

[0033] Please refer to the following: Figure 3 and Figure 4 The main shaft 2 is connected to the corresponding front cylinder 12 and rear cylinder 13 through bearing seats 34 and roller bearings. The upper end of the central cylinder 32 is connected to a partition plate 35. The partition plate 35 on the front cylinder 12 is snapped onto the front cylinder 12, and the partition plate 35 on the rear cylinder 13 is snapped onto the rear cylinder 13. A through groove 36 is provided on the rotor ring sleeve 31 at the position corresponding to the partition plate 35.

[0034] Please see Figure 3 The partition 35 divides the corresponding rotor cavity into working chamber M and working chamber N. The partition 35 enables the pumping of the medium inside the pump body 1 and ensures the sealing effect of the corresponding working chamber.

[0035] During the rotation of the main shaft 2, the rotor ring 31 will be indirectly driven to rotate. During the rotation of the rotor ring 31, its outer wall is always tangent to the inner wall of the cylinder, and its inner wall is always tangent to the central cylinder 32. Thus, through the action of the tangential and partition plate 35, the working chamber M and the working chamber N will be divided into two regions. The volume of the divided regions of the working chamber is always dynamically changing. During the change, the medium is sucked in and pushed out, thus completing the medium pumping.

[0036] Please see Figure 5 The portion of the outer wall of the main shaft 2 located at the rotor support cavity 103 is connected to an eccentric sleeve 21 by a key, and the outer wall of the eccentric sleeve 21 is connected to the rotor support sleeve 131 by a sleeved roller bearing. The eccentric sleeve 21 serves to connect the rotor support sleeve 131 inside the cylinder spacer 14. The purpose is to make the two rotor rings 31 move against the corresponding rotor cavities through the movement of the eccentric sleeve 21, thereby realizing the pumping of the medium.

[0037] Please see Figure 1 The front rotor cavity 101 is located inside the front cylinder 12, and the rear rotor cavity 102 is located inside the rear cylinder 13. The sealing gap between the rotor ring sleeve 31 and the corresponding rotor cavity, as well as the sealing gap between the rotor ring sleeve 31 and the central cylinder 32, are both 0.02mm-0.04mm.

[0038] A sealing gap is provided between the rotor ring sleeve 31 and the corresponding inner wall of the rotor cavity, and between the central cylinder 32 and the inner wall of the rotor ring sleeve 31, so that they do not come into contact with each other. This ensures that the pump can maintain the sealing gap for a long time without changing due to wear, thus ensuring self-priming performance.

[0039] Please refer to the following: Figure 1 and Figure 4 The central cylinder 32 corresponding to the rear rotor cavity 102 is mounted on the rear cylinder 13 by screws, and the central cylinder 32 corresponding to the front rotor cavity 101 is mounted on the front cylinder 12 by screws. One end of the spacer sleeve 33 abuts against the outer ring of the bearing inside the central cylinder 32. The bearing seats 34 corresponding to the front cylinder 12 and the rear cylinder 13 are all connected by screws.

[0040] Please see Figure 4 The upper end of the rotor support sleeve 131 is provided with a lug seat 132 extending along its axial direction. The lug seat 132 is hinged to a guide core 133. The upper end of the cylinder spacer 14 is provided with a guide groove 141 for the guide core 133 to move up and down. An elastic sealing gasket is provided between the guide core 133 and the guide groove 141.

[0041] As the rotor support sleeve 131 rotates with the eccentric wheel sleeve 21, the rotor ring sleeve 31 undergoes volume transformation by rolling and slightly sliding inside the corresponding cylinder due to the restriction of the guide core 133, thereby achieving the purpose of pumping.

[0042] Please refer to the following: Figure 4 and Figure 5The main shaft 2 passes through the corresponding front cylinder 12 and rear cylinder 13 at both ends. The parts of the main shaft 2 located on the outside of the front cylinder 12 and the rear cylinder 13 are respectively connected by keys to provide counterweights 22. The counterweights 22 located on the rear cylinder 13 are also provided with a protective cover 23 on the outside. The protective cover 23 is installed on the outer wall of the rear cylinder 13 by screws. The centers of gravity of the two counterweights 22 are on the same straight line and parallel to the axis of the main shaft 2. The centers of gravity of the two counterweights 22 and the center of gravity of the eccentric sleeve 21 are on the same plane, and the centers of gravity of the counterweights 22 and the eccentric sleeve 21 are symmetrically distributed on both sides of the axis of the main shaft 2. During the rotation of the main shaft 2, the eccentric sleeve 21 will generate an unbalanced force as it rotates with the main shaft 2. This unbalanced force will generate centrifugal force, leading to vibration and noise. On the other hand, it will affect the service life of the internal bearings of the pump and even cause mechanical failure of the pump. By setting the counterweights 22, and with the centers of gravity of the counterweights 22 and the eccentric sleeve 21 symmetrically distributed on both sides of the axis of the main shaft 2, the unbalanced force generated by the eccentric sleeve 21 during the rotation of the main shaft 2 can be offset, thereby achieving dynamic balance compensation, reducing vibration and wear, improving the operating efficiency of the main shaft 2, and making the main shaft 2 more suitable for high-speed conditions.

[0043] Please refer to the following: Figure 1 , Figure 3 and Figure 4 The inlet / outlet assembly 11 is provided with an observation chamber 113. The observation chamber 113 has two slots, one of which is connected to the suction port 111 and the other is connected to the discharge port 112. The observation chamber 113 is provided with a cover 114 by bolts and washers. When the inlet / outlet assembly 11 is blocked or other problems occur during the transmission of the medium, the cover 114 can be opened to observe the condition inside the rotor pump.

[0044] Please refer to the following: Figure 1 The lower ends of the front cylinder 12, the rear cylinder 13, and the cylinder spacer 14 are all provided with oil drain ports, and oil drain bolts 15 are provided at the oil drain port positions. The purpose of providing oil drain bolts 15 is to facilitate the drainage of the medium inside the pump body 1 when overhauling this rotor pump.

[0045] When the oscillating rotor pump is working, the suction pipe and the discharge pipe are manually sealed and connected to the interface of the pump body 1, and then connected to the main shaft 2 through an external motor. With the existing base, the rotor pump and the motor axis are kept on the same plane. The motor drives the main shaft 2 to rotate. Furthermore, the main shaft 2 drives the rotor ring 31 inside the front cylinder 12 and the rotor ring 31 inside the rear cylinder 13 to perform synchronous rolling and slight sliding motion, thereby controlling the volume change of the two working chambers inside the corresponding rotor cavity, so as to achieve the purpose of pumping.

[0046] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A wear-resistant oscillating rotor pump, comprising a pump body and a main shaft housed inside the pump body, characterized in that: The pump body is provided with a front rotor chamber and a rear rotor chamber, and each rotor chamber is provided with a swing rotor part. The swing rotor parts are located in the corresponding rotor chamber and connected to the main shaft. The pump body is also provided with a rotor support chamber between the front rotor chamber and the rear rotor chamber. The rotor support chamber is provided with a rotor support sleeve, which is connected to the swing rotor parts on both sides. An eccentric sleeve is connected to the outer wall of the main shaft at the rotor support cavity. The outer wall of the eccentric sleeve is connected to the rotor support sleeve through a sleeved roller bearing. The swing rotor includes a rotor ring sleeve connected to a rotor support sleeve by screws. The rotor ring sleeve is set inside the corresponding rotor cavity. A central cylinder is set inside the rotor ring sleeve. The inner wall of the central cylinder is connected to the main shaft at the corresponding position by a bearing. A spacer sleeve is also nested in the inner wall of the central cylinder. The main shaft and the pump body are connected by a bearing seat and a bearing. A partition plate is connected to the upper end of the central cylinder. The partition plate is snapped onto the pump body. A through groove is opened on the rotor ring sleeve at the position corresponding to the partition plate. The corresponding rotor cavity is divided into working cavity two and working cavity one by the action of the partition; The pump body includes an inlet / outlet assembly, a front cylinder, a rear cylinder, and a cylinder spacer; a cylinder spacer is provided between the front cylinder and the rear cylinder, and the cylinder spacer is sealed to both the front cylinder and the rear cylinder by gaskets; the upper ends of the front cylinder, the rear cylinder, and the cylinder spacer are all connected to the inlet / outlet assembly by bolts. The inlet and outlet assembly is provided with an observation chamber. Inside the observation chamber, there are two slots. One slot is connected to the suction port and the other slot is connected to the discharge port. The observation chamber is covered with a cover by bolts and washers.

2. The wear-resistant oscillating rotor pump according to claim 1, characterized in that, The front rotor cavity is located inside the front cylinder block, and the rear rotor cavity is located inside the rear cylinder block. The sealing gap between the rotor ring and the corresponding rotor cavity, as well as the sealing gap between the rotor ring and the central cylinder, are both 0.02mm-0.04mm.

3. The wear-resistant oscillating rotor pump according to claim 1, characterized in that, The central cylinder corresponding to the rear rotor cavity is mounted on the rear cylinder block by screws, and the central cylinder corresponding to the front rotor cavity is mounted on the front cylinder block by screws. One end of the spacer sleeve abuts against the outer ring of the bearing inside the central cylinder. The bearing seats corresponding to the front and rear cylinder blocks are connected by screws.

4. The wear-resistant oscillating rotor pump according to claim 1, characterized in that, The upper end of the rotor support sleeve is provided with a lug seat extending along its axial direction. A guide core is hinged inside the lug seat. The upper end of the cylinder spacer sleeve is provided with a guide groove for the guide core to move up and down. An elastic sealing gasket is provided between the guide core and the guide groove.

5. A wear-resistant oscillating rotor pump according to claim 1, characterized in that, The main shaft passes through the corresponding front and rear cylinder blocks at both ends. The parts of the main shaft located on the outside of the front and rear cylinder blocks are respectively connected by keys to set counterweights. A protective cover is also set on the outside of the counterweight located in the rear cylinder block. The protective cover is installed on the outer wall of the rear cylinder block by screws.

6. A wear-resistant oscillating rotor pump according to claim 5, characterized in that, The centers of gravity of the two counterweights are on the same straight line and parallel to the axis of the main shaft. The centers of gravity of the two counterweights and the center of gravity of the eccentric wheel sleeve are on the same plane, and the centers of gravity of the counterweights and the center of gravity of the eccentric wheel sleeve are symmetrically distributed on both sides of the axis of the main shaft.

7. A wear-resistant oscillating rotor pump according to claim 1, characterized in that, The lower ends of the front cylinder block, the rear cylinder block, and the cylinder block spacer are all provided with oil drain ports, and oil drain bolts are provided at the positions of the oil drain ports.

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