Wear-resistant swing rotor pump

Abstract

The invention belongs to the field of pump equipment, and relates to a wear-resistant swing rotor pump. Comprising a pump body and a main shaft contained in the pump body, a front rotor cavity and a rear rotor cavity are formed in the pump body, swing rotor parts are arranged in the front rotor cavity and the rear rotor cavity, and the swing rotor parts are arranged in the corresponding rotor cavities and connected with the main shaft; in the using process, most impurity particles can be taken away along with media in the crescent working cavity, even if the rotor ring sleeve or the cylinder body is scratched, damage to a certain position only influences the sealing performance of the angle, sealing of the next angle cannot be influenced, the abrasion resistance of the pump body is improved, and the service life of the pump body is prolonged. Meanwhile, a bilaterally symmetrical double-cylinder four-cavity structure is adopted, the volume is enlarged, axial force acting on the rotor ring sleeve is offset, friction between the cylinder body and the rotor ring sleeve can be avoided under the condition that it is guaranteed that the gap between the cylinder body and the rotor ring sleeve and the gap between the rotor ring sleeve and the center cylinder are both 0.02 mm-0. 04 mm, and the long-term use effect of the pump is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the field of pump equipment, and particularly relates to an abrasion-resistant swinging rotor pump. Background Art

[0002] A swinging rotor pump is a positive displacement pump, mainly composed of components such as a pump body, a swinging rotor, and a drive shaft. Its working principle is that through the swinging of the swinging rotor in the pump body, a variable sealing chamber is formed to achieve the suction and discharge of liquid. Compared with other types of pumps, the swinging rotor pump has the advantages of compact structure, strong self-priming ability, uniform flow rate, and strong adaptability to media, and is widely used in many fields such as petroleum, chemical industry, food, and pharmacy.

[0003] In many industrial application scenarios, the media transported by the swinging rotor pump contain some fine particles, which cause very serious wear to the flow-through components of the pump; for example, in the field of oil extraction, the transported crude oil may contain impurities such as particles, which will also cause wear to the pump. Under such working conditions, components such as the rotor and the pump body of an ordinary swinging rotor pump are prone to wear. The wear will cause the gap between the rotor and the pump body to increase, thereby increasing the internal leakage of the pump and reducing the volumetric efficiency of the pump.

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

[0005] In order to ensure the continuity and stability of the pump during the industrial production process and improve production efficiency, the present invention provides an abrasion-resistant swinging rotor pump to reduce the impact of wear on the pump performance. Summary of the Invention

[0006] In view of the above problems, an abrasion-resistant swinging rotor pump provided by an embodiment of the present application has a relatively large working chamber volume. Most of the impurity particles are carried away with the medium in the crescent-shaped working chamber. Even if hard particles just squeeze into the sealing line and cause scratches on the rotor ring sleeve or the cylinder block, since the sealing lines formed by the rotor ring sleeve and the cylinder block as well as the rotor ring sleeve and the central cylinder are all line-to-line relationships, the damage at a certain place will only affect the sealing performance at that angle, rather than affecting the sealing of the next angle, effectively improving the wear resistance of the pump body. At the same time, a left-right symmetric double-cylinder four-chamber structure is adopted. While expanding the volume, the axial forces acting on the rotor ring sleeve cancel each other out. When ensuring that the gap between the cylinder block and the rotor ring sleeve and the gap between the rotor ring sleeve and the central cylinder are both within 0.02 mm - 0.04 mm, it can avoid the friction between the cylinder block and the rotor ring sleeve and ensure this sealing gap for a long time, ensuring the long-term use effect of the pump body.

[0007] To achieve the above object, the embodiments of the present application provide the following technical solutions: a wear-resistant swing rotor pump, including a pump body, a main shaft accommodated inside the pump body, a front rotor cavity and a rear rotor cavity are respectively arranged inside the pump body, swing rotor parts are arranged inside both the front rotor cavity and the rear rotor cavity, and the swing rotor parts are arranged inside the corresponding rotor cavities and are connected to the main shaft; a rotor support cavity is further arranged inside the pump body between the front rotor cavity and the rear rotor cavity, a rotor support sleeve is arranged inside the rotor support cavity, and the rotor support sleeve is connected to the swing rotor parts on both sides.

[0008] A part of the outer wall of the main shaft at the position of the rotor support cavity is connected with an eccentric sleeve through a key, and the outer wall of the eccentric sleeve is connected with the rotor support sleeve through a sleeved roller bearing.

[0009] The swing rotor part includes a rotor ring sleeve connected to the rotor support sleeve through screws, the rotor ring sleeve is arranged inside the corresponding rotor cavity, a central cylinder is arranged inside the rotor ring sleeve, and the inner wall of the central cylinder is connected to the corresponding position of the main shaft through a bearing; a spacer sleeve is further nested inside the inner wall of the central cylinder, the main shaft and the pump body are connected through a bearing seat and a roller bearing, the upper end of the central cylinder is connected with a partition plate, the partition plate is clamped on the pump body, and a through groove is opened at the position of the rotor ring sleeve corresponding to the partition plate; through the action of the partition plate, the corresponding rotor cavity is divided into a working cavity two M and a working cavity one N.

[0010] According to a preferred embodiment, the pump body includes an inlet and outlet assembly, a front cylinder block, a rear cylinder block and a cylinder block spacer; a cylinder block spacer is arranged between the front cylinder block and the rear cylinder block, and the cylinder block spacer is hermetically connected to both the front cylinder block and the rear cylinder block through gaskets; the upper ends of the front cylinder block, the rear cylinder block and the cylinder block spacer are respectively connected with the inlet and outlet assembly through bolts.

[0011] According to a preferred embodiment, the front rotor cavity is arranged inside the front cylinder block, the rear rotor cavity is arranged inside the rear cylinder block, and the sealing gap between the rotor ring sleeve and the corresponding rotor cavity is 0.02 mm - 0.04 mm.

[0012] According to a preferred embodiment, the central cylinder corresponding to the rear rotor cavity is installed on the rear cylinder block through screws, the central cylinder corresponding to the front rotor cavity is installed on the front cylinder block through screws, one end side wall of the spacer sleeve abuts against the outer ring of the bearing inside the central cylinder, and the bearing seats corresponding to the front cylinder block and the rear cylinder block are both connected through screws.

[0013] According to a preferred embodiment, a lug seat extending along its axis direction is arranged at the upper end of the rotor support sleeve, a guide core is hingedly arranged inside the lug seat, a guide groove for the up and down movement of the guide core is opened at the upper end of the cylinder block spacer, and an elastic sealing gasket is arranged between the guide core and the guide groove.

[0014] According to an advantageous embodiment, both ends of the main shaft penetrate through the corresponding front cylinder block and rear cylinder block respectively. Counterweight blocks are respectively arranged on the parts of the main shaft located outside the front cylinder block and the rear cylinder block through key connections. A protective cover is further arranged outside the counterweight block located at the position of the rear cylinder block, and the protective cover is installed on the outer wall of the rear cylinder block through screws.

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

[0016] According to an advantageous embodiment, an observation cavity is arranged on the inlet and outlet port assembly. Two notches are respectively arranged inside the observation cavity. One notch is communicated with the liquid suction port, and the other notch is communicated with the liquid discharge port. A cavity cover is arranged outside the observation cavity through bolts and gaskets.

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

[0018] Compared with the prior art, a wear-resistant swing rotor pump provided by an embodiment of the present invention has the following beneficial effects: 1. During the working process of the present invention, most of the impurity particles are taken away with the medium in the crescent-shaped working cavity. Even if hard particles just squeeze into the sealing line, causing scratches on the rotor ring sleeve or the cylinder block. Since the sealing lines formed by the rotor ring sleeve and the cylinder block and the sealing line formed by the rotor ring sleeve and the central cylinder are both line-to-line relationships, the damage at a certain place will only affect the sealing performance at this angle, rather than affecting the sealing of the next angle, effectively improving the wear resistance of the pump body.

[0019] 2. The working cavity two and the working cavity one of the present invention are always changing, and the change of the working cavity makes the suction volume and discharge volume of the medium tend to be consistent, thus ensuring the balance of the output flow rate.

[0020] 3. The pump of the present invention simultaneously adopts a left-right symmetric double-cylinder four-chamber structure inside. While expanding the volume of the working cavity, the axial forces acting on the rotor ring sleeve cancel each other out. When the gap between the cylinder block and the rotor ring sleeve is ensured to be between 0.02 mm and 0.04 mm, the friction between the cylinder block and the rotor ring sleeve can be avoided, and this sealing gap can be maintained for a long time, ensuring the long-term use effect of the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a half-sectional view of a partial structure in the front view position of the present invention.

[0022] Figure 2 It is the front view of the present invention.

[0023] Figure 3 For the present invention Figure 2 is the sectional view taken along the A-A broken line in the present invention.

[0024] Figure 4 is the half-sectional view of the position of the front rotor cavity of the present invention.

[0025] Figure 5 is the sectional view at the side view position of the present invention.

[0026] Reference numerals in the figure: 1, pump body; 2, main shaft; 3, swinging rotor part; 31, rotor ring sleeve; 32, central cylinder; 33, spacer sleeve; 34, bearing seat; 35, partition plate; 36, through groove; M, working chamber II; N, working chamber I; 101, front rotor cavity; 102, rear rotor cavity; 103, rotor support cavity; 131, rotor support sleeve; 132, lug seat; 133, guide core; 21, eccentric wheel sleeve; 22, counterweight; 23, protective cover; 11, drain port assembly; 12, front cylinder block; 13, rear cylinder block; 14, cylinder block spacer sleeve; 15, drain bolt; 111, liquid suction port; 112, liquid discharge port; 113, observation chamber; 114, chamber cover; 141, guide groove. Detailed implementation manners

[0027] The following further elaborates on the present application Figures 1-5 in conjunction with the appended drawings.

[0028] Please refer to Figure 1 , a wear-resistant swinging rotor pump, comprising a pump body 1 and a main shaft 2 accommodated inside the pump body 1. The inside of the pump body 1 is respectively provided with a front rotor cavity 101 and a rear rotor cavity 102. A swinging rotor part 3 is provided inside both the front rotor cavity 101 and the rear rotor cavity 102. The swinging rotor parts 3 are disposed inside the corresponding rotor cavities and are connected to the main shaft 2; a rotor support cavity 103 is further 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 the rotor support sleeve 131 is connected to the swinging rotor parts 3 on both sides.

[0029] During operation, manually seal the suction pipeline and the liquid discharge pipeline to the interface of the pump body 1 respectively, and then connect an external motor to the main shaft 2, and cooperate with an existing base to keep the axes of the rotor pump and the motor in the same plane. Drive the main shaft 2 to rotate through the operation of the motor, and further drive the swinging rotor part 3 to work through the main shaft 2, and realize the pumping of the medium through the swinging rotor part 3.

[0030] Please refer in combination to Figure 1 and Figure 2, the pump body 1 includes an inlet and outlet assembly 11, a front cylinder block 12, a rear cylinder block 13, and a cylinder block spacer sleeve 14; a cylinder block spacer sleeve 14 is arranged between the front cylinder block 12 and the rear cylinder block 13, and both the cylinder block spacer sleeve 14 and the front cylinder block 12 and the rear cylinder block 13 are hermetically connected through gaskets; the upper ends of the front cylinder block 12, the rear cylinder block 13, and the cylinder block spacer sleeve 14 are jointly connected with the inlet and outlet assembly 11 through bolts.

[0031] Please refer to Figure 3 and Figure 4 , the swing rotor part 3 includes a rotor ring sleeve 31 connected to the rotor support sleeve 131 by screws. The rotor ring sleeve 31 is arranged inside the corresponding rotor cavity. A central cylinder 32 is arranged inside the rotor ring sleeve 31. The inner wall of the central cylinder 32 is connected to the corresponding position of the main shaft 2 through a bearing; a spacer sleeve 33 is also nested on the inner wall of the central cylinder 32.

[0032] Please refer to Figure 3 and Figure 4 , the main shaft 2 is connected to the corresponding front cylinder block 12 and rear cylinder block 13 through bearing seats 34 and roller bearings. A partition plate 35 is connected to the upper end of the central cylinder 32. The partition plate 35 corresponding to the front cylinder block 12 is clamped on the front cylinder block 12, and the partition plate 35 corresponding to the rear cylinder block 13 is clamped on the rear cylinder block 13. A through groove 36 is provided at the position of the rotor ring sleeve 31 corresponding to the partition plate 35.

[0033] Please refer to Figure 3 , through the action of the partition plate 35, the corresponding rotor cavity is divided into a second working chamber M and a first working chamber N; the action of the partition plate 35 realizes the suction work of the medium inside the pump body 1 and ensures the sealing effect of the corresponding working chamber.

[0034] During the rotation of the main shaft 2, it will indirectly drive the rotor ring sleeve 31 to rotate. During the rotation of the rotor ring sleeve 31, its outer wall is always tangent to the inner wall of the cylinder block, and the inner wall of the rotor ring sleeve 31 is always tangent to the central cylinder 32. Therefore, through the tangential cooperation with the partition plate 35, the second working chamber M and the first working chamber N are always divided into two regions respectively. The volume of the divided regions of the working chamber is always dynamically changing, and during the changing process, the suction and ejection of the medium will be completed, thus completing the medium pumping.

[0035] Please refer to Figure 5 , a part of the outer wall of the main shaft 2 located at the rotor support cavity 103 is connected with an eccentric wheel sleeve 21 through a key, and the outer wall of the eccentric wheel sleeve 21 is connected with the rotor support sleeve 131 through a sleeved roller bearing; the setting of the eccentric wheel sleeve 21 plays a connecting role for the rotor support sleeve 131 inside the cylinder block spacer sleeve 14. The purpose is to make the two rotor ring sleeves 31 move along the corresponding rotor cavities through the movement of the eccentric wheel sleeve 21, so as to realize the medium pumping.

[0036] Please refer to Figure 1 , the front rotor cavity 101 is arranged inside the front cylinder block 12, the rear rotor cavity 102 is arranged inside the rear cylinder block 13, and the sealing gaps between the rotor ring sleeve 31 and the corresponding rotor cavities and between the rotor ring sleeve 31 and the central cylinder 32 are both 0.02 mm - 0.04 mm.

[0037] Sealing gaps are provided between the rotor ring sleeve 31 and the inner wall of the corresponding rotor cavity and between the central cylinder 32 and the inner wall of the rotor ring sleeve 31 without contacting each other, ensuring that the pump can maintain this sealing gap for a long time without changing due to wear and guaranteeing the self-priming performance.

[0038] Please refer to in combination Figure 1 and Figure 4 , the central cylinder 32 corresponding to the rear rotor cavity 102 is installed on the rear cylinder block 13 by screws, the central cylinder 32 corresponding to the front rotor cavity 101 is installed on the front cylinder block 12 by screws, one end side wall of the spacer sleeve 33 abuts against the outer ring of the inner bearing of the central cylinder 32, and the bearing seats 34 corresponding to the front cylinder block 12 and the rear cylinder block 13 are both connected by screws.

[0039] Please refer to Figure 4 , the upper end of the rotor support sleeve 131 is provided with a lug seat 132 extending along its axis direction, a guide core 133 is hingedly arranged inside the lug seat 132, a guide groove 141 for the up and down movement of the guide core 133 is opened at the upper end of the cylinder block spacer 14, and an elastic sealing pad is arranged between the guide core 133 and the guide groove 141.

[0040] During the process of the rotor support sleeve 131 rotating with the eccentric wheel sleeve 21, due to the limitation of the guide core 133, the rotor ring sleeve 31 makes volume transformation in the form of rolling plus a small amount of slip inside the corresponding cylinder block to achieve the purpose of pumping.

[0041] Please refer to in combination Figure 4 and Figure 5, both ends of the main shaft 2 penetrate through the corresponding front cylinder block 12 and rear cylinder block 13 respectively. Counterweight blocks 22 are respectively arranged on the parts of the main shaft 2 outside the front cylinder block 12 and rear cylinder block 13 through key connections. A protective cover 23 is also arranged outside the counterweight block 22 at the position of the rear cylinder block 13, and the protective cover 23 is installed on the outer wall of the rear cylinder block 13 through screws. The centers of gravity of the two counterweight blocks 22 are on the same straight line and parallel to the axis of the main shaft 2. The centers of gravity of the two counterweight blocks 22 and the center of gravity of the eccentric sleeve 21 are in the same plane, and the centers of gravity of the counterweight blocks 22 and the center of gravity of 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, since the eccentric sleeve 21 will generate an unbalanced force when rotating with the main shaft 2, on the one hand, the unbalanced force will generate a centrifugal force, resulting in vibration and noise; on the other hand, it will affect the service life of the internal bearings of the pump and even cause mechanical failures of the pump. By setting the counterweight blocks 22 and the centers of gravity of the counterweight blocks 22 and the center of gravity of the eccentric sleeve 21 are symmetrically distributed on both sides of the axis of the main shaft 2, the unbalanced force generated during the rotation of the eccentric sleeve 21 with the main shaft 2 can be offset, thereby realizing dynamic balance compensation, reducing vibration and wear, improving the operating efficiency of the main shaft 2, and making the main shaft 2 more adaptable to high-speed working conditions.

[0042] Please refer to Figure 1 , Figure 3 and Figure 4 , an observation chamber 113 is arranged on the inlet and outlet port assembly 11. Two notches are respectively arranged inside the observation chamber 113. One notch is communicated with the liquid suction port 111, and the other notch is communicated with the liquid discharge port 112. A chamber cover 114 is arranged outside the observation chamber 113 through bolts and washers. When a blockage or other conditions occur inside the inlet and outlet port assembly 11 during the transmission of the medium, the chamber cover 114 can be opened to observe the conditions inside the rotor pump.

[0043] Please refer to Figure 1 , drain ports are arranged at the lower ends of the front cylinder block 12, rear cylinder block 13 and cylinder block spacer 14, and drain bolts 15 are arranged at the drain port positions. The purpose of setting the drain bolts 15 is to facilitate the emptying of the medium inside the pump body 1 when overhauling this rotor pump.

[0044] When the swinging rotor pump is working; manually seal the suction pipe and the discharge pipe to the interface of the pump body 1 respectively, and then connect the external motor to the main shaft 2. Cooperate with the existing base to keep the axes of the rotor pump and the motor in the same plane. Drive the main shaft 2 to rotate through the operation of the motor, and further drive the rotor ring sleeves 31 inside the front cylinder block 12 and the rotor ring sleeves 31 inside the rear cylinder block 13 to synchronously perform rolling and micro-sliding movements, so as to control the volume change of the two working chambers inside the corresponding rotor chambers, thereby achieving the purpose of pumping.

[0045] The above are only embodiments of the present invention, and do not thereby limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present invention.

Claims

1. A wear-resistant swing rotor pump, comprising a pump body and a main shaft accommodated in the pump body, characterized in that: The pump body is provided with a front rotor cavity and a rear rotor cavity, respectively, and a swing rotor portion is provided inside the two rotor cavities, and the swing rotor portions are arranged inside the corresponding rotor cavity and connected to the main shaft; the pump body is provided with a rotor support cavity between the front rotor cavity and the rear rotor cavity, and a rotor support sleeve is provided inside the rotor support cavity, and the rotor support sleeve is connected to the swing rotor portions on both sides; The part of the main shaft outer wall located at the rotor support cavity is connected with an eccentric wheel sleeve, and the outer wall of the eccentric wheel sleeve is connected to the rotor support sleeve through a sleeved roller bearing; The swing rotor part includes a rotor ring connected to the rotor support sleeve by screws, the rotor ring is arranged inside the corresponding rotor cavity, a central cylinder is arranged inside the rotor ring, and the inner wall of the central cylinder is connected to the corresponding position of the main shaft through a bearing; a spacer sleeve is also nested on the inner wall of the central cylinder, the main shaft and the pump body are connected through a bearing seat and a bearing, a partition is connected to the upper end of the central cylinder, the partition is clamped on the pump body, and a through groove is opened on the rotor ring at a position corresponding to the partition; The corresponding rotor chamber is divided into working chamber 2 and working chamber 1 by the action of the partition.

2. A wear-resistant oscillating rotor pump according to claim 1, characterized in that: The pump body includes an inlet and outlet assembly, a front cylinder body, a rear cylinder body and a cylinder spacer; a cylinder spacer is arranged between the front cylinder body and the rear cylinder body, and the cylinder spacer is sealed and connected to the front cylinder body and the rear cylinder body through gaskets; the upper ends of the front cylinder body, the rear cylinder body and the cylinder spacer are respectively connected to the inlet and outlet assembly through bolts.

3. A wear-resistant oscillating rotor pump according to claim 2, characterized in that: The front rotor cavity is arranged inside the front cylinder body, the rear rotor cavity is arranged inside the rear cylinder body, and the sealing gap between the rotor ring and the corresponding rotor cavity and the sealing gap between the rotor ring and the central cylinder are both 0.02mm-0.04mm.

4. A wear-resistant oscillating rotor pump according to claim 2, characterized in that: The central cylinder corresponding to the rear rotor cavity is installed on the rear cylinder body by screws, and the central cylinder corresponding to the front rotor cavity is installed on the front cylinder body by screws. The side wall of 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 cylinder body and the rear cylinder body are connected by screws.

5. A wear-resistant oscillating rotor pump according to claim 2, characterized in that: The upper end of the rotor support sleeve is provided with a lug seat extending along its axial direction, and a guide core is hingedly provided 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, and an elastic sealing gasket is provided between the guide core and the guide groove.

6. A wear-resistant oscillating rotor pump according to claim 2, characterized in that: The two ends of the main shaft respectively pass through the corresponding front cylinder body and rear cylinder body, and the parts of the main shaft located on the outside of the front cylinder body and the rear cylinder body are respectively provided with counterweight blocks through key connections. A protective cover is also provided on the outside of the counterweight block located at the rear cylinder body, and the protective cover is installed on the outer wall of the rear cylinder body by screws.

7. A wear-resistant oscillating rotor pump according to claim 6, characterized in that: The centers of gravity of the two counterweights are in the same straight line and parallel to the main shaft axis. 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 main shaft axis.

8. A wear-resistant oscillating rotor pump according to claim 2, characterized in that: The inlet and outlet assembly is provided with an observation cavity, and two notches are respectively provided inside the observation cavity, one of which is connected with the liquid suction port, and the other is connected with the liquid discharge port. A cavity cover is provided outside the observation cavity through bolts and washers.

9. A wear-resistant oscillating rotor pump according to claim 2, characterized in that: The lower ends of the front cylinder body, the rear cylinder body and the cylinder body spacer are all provided with oil unloading ports, and the oil unloading ports are provided with oil unloading bolts.

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