Cam pump capable of automatically compensating abrasion

Abstract

The invention discloses a cam pump capable of automatically compensating abrasion, which comprises a stator, end covers are arranged on both sides of the stator, a rotating shaft is rotatably connected in the stator, a cam rotor is arranged outside the rotating shaft, a cam sealing groove is formed in the cam rotor, and a cam sealing strip is arranged in the cam sealing groove. Stator blade grooves are formed in the stator, blade shafts are arranged in the stator blade grooves, blades are arranged outside the blade shafts, blade springs are arranged outside the blades, and the blade springs are fixedly connected to the inner wall of the stator. According to the device, the sealing strip and the blade automatically adjust the sealing pressure along with the change of the medium pressure during working, unnecessary friction is reduced while the sealing effect is guaranteed, the service life is prolonged, energy loss caused by friction is reduced, reciprocating motion of a piston connecting rod mechanism is avoided, and the service life of the device is prolonged. Therefore, idle work caused by overcoming inertia is avoided, and the working efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cam pumps, and in particular relates to a cam pump capable of automatically compensating for wear. Background Art

[0002] Similar products on the market include piston pumps, gear pumps, vane pumps, cycloid pumps, rotor piston engines, etc. Each structure has its own shortcomings. For example, the piston connecting rod structure needs to overcome the reciprocating inertia of the piston to consume extra power, and the sealing piston ring needs to be replaced after a certain period of use, which makes maintenance difficult. Gear pumps and cycloid pumps require very precise processing accuracy to ensure the sealing effect. The viscosity of the medium directly affects the working effect. Even so, a good sealing effect cannot be achieved. The Wankel engine with a triangular piston is difficult to seal and has severe wear. The gap between the vane and the rotor of the vane pump is difficult to seal and is prone to wear. Summary of the invention

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a cam pump that can automatically compensate for wear, which has the advantages of high efficiency, good sealing effect, simple structure, easy production and manufacturing, and automatic compensation for wear.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cam pump capable of automatically compensating for wear, comprising a stator, end covers are arranged on both sides of the stator, the interior of the stator is rotatably connected to a rotating shaft, a cam rotor is arranged on the outside of the rotating shaft, a cam sealing groove is provided inside the cam rotor, a cam sealing strip is provided inside the cam sealing groove, a stator blade groove is provided inside the stator, a blade shaft is provided inside the stator blade groove, a blade is provided outside the blade shaft, a blade is provided outside the blade, a blade spring is arranged outside the blade, and the blade spring is fixedly connected to the inner wall of the stator.

[0005] Preferably, a first channel hole is provided inside the stator, and a second channel hole is provided inside the stator.

[0006] Preferably, pressure balancing holes are opened inside the cam rotor, the number of the pressure balancing holes is four, and the four pressure balancing holes are evenly distributed outside the cam rotor.

[0007] Preferably, a cam sealing strip is provided inside the cam rotor.

[0008] Preferably, a first working chamber is provided inside the stator, and a second working chamber is provided inside the stator.

[0009] Preferably, a stator end face sealing groove is provided inside the stator, and the stator end face sealing groove is located on the inner wall of the stator.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. The device avoids the reciprocating motion of the piston-connecting rod mechanism, thereby avoiding the useless work caused by overcoming inertia and improving work efficiency. Due to the characteristics of the structure of the invention, the intake and exhaust of the working medium can be carried out simultaneously, thereby improving work efficiency and increasing power when used as an air pump or pneumatic motor. Because of its good linearity of input and output torque, it runs smoothly and has less vibration. Because it has a wear compensation function, it greatly extends the service life and maintenance cycle of the machine, and reduces the requirements for production accuracy. The sealing strips and blades of the invention automatically adjust the sealing pressure as the medium pressure changes during operation, while ensuring the sealing effect and reducing unnecessary friction, that is, increasing the service life and reducing the energy loss caused by friction. The invention can be used as an air pump or hydraulic pump when rotating forward. If the inlet and outlet holes are swapped, the rotor can be used as a pneumatic motor or hydraulic motor when reversing. It can also be used as a liquid flow metering pump or vacuum pump, so the device has a very wide range of applications.

[0011] 2. The stator has a stator blade slot, in which a blade is installed. One end of the blade is fixed to the stator through the blade shaft, and the other end of the blade can swing back and forth around the blade shaft within a certain range. There are channel holes on both sides of the blade, which are used for the entry and discharge of the working medium. The rotor is provided with one or several cams evenly arranged, and each cam has a cam sealing slot at the top, and a cam sealing strip is inlaid in the cam sealing slot. The cam sealing strip is slidably sealed with the inner wall of the stator. When the cam rotor rotates, the non-fixed end of the blade is always pressed against the surface of the cam rotor under the joint action of the blade spring and the medium pressure, thereby achieving a sealing effect and an automatic compensation effect for blade wear. When the top of the cam rotor's cam runs to the vicinity of the stator blade slot, the blade is closed in the stator blade slot under the push of the cam rotor's cam, and the blade closes the channel opening at the same time. The channel hole is directly connected to the outside. The end cover and the end face of the stator are sealed through the stator end face sealing groove and the sealing strip embedded in the sealing groove, and fixed with screws. The two end faces of the cam rotor and the end cover are slidably sealed through the sealing strip embedded in the rotor end face sealing groove. The sealing groove of the cam is connected to the pressure balance hole. When there is a high-pressure medium in the first working chamber, the pressure will be transmitted to the cam sealing strip, so that the cam sealing strip is tightly pressed against the inner wall of the stator, thereby achieving the effect of sealing and wear compensation. When the cam part of the cam rotor passes over the stator blade groove, the non-fixed end of the blade re-engages with the outer surface of the rotor to start the next working cycle. According to different application scenarios, the cams on the cam rotor can be evenly arranged along the circumference. Similarly, the blade grooves, blades and the first channel holes and the second channel holes on both sides of the blades on the stator can also be evenly arranged along the circumference. According to different usage scenarios, we can also adjust the shape of the rotor cam to achieve the best working effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic structural diagram of the overall side of the present invention; Figure 3 It is a schematic diagram of the cam rotor structure of the present invention.

[0013] In the figure: 1. stator; 2. cam rotor; 3. end cover; 4. blade; 5. first channel hole; 6. second channel hole; 7. cam sealing groove; 8. cam sealing strip; 9. blade spring; 10. rotating shaft; 11. stator blade groove; 12. stator end face sealing groove; 13. pressure balance hole; 14. first working chamber; 15. second working chamber; 16. blade shaft. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0015] See also Figure 1-3 The present invention provides a technical solution: a cam pump capable of automatically compensating for wear, comprising a stator 1, end covers 3 are arranged on both sides of the stator 1, a rotating shaft 10 is rotatably connected inside the stator 1, a cam rotor 2 is arranged outside the rotating shaft 10, a cam sealing groove 7 is opened inside the cam rotor 2, a cam sealing strip 8 is arranged inside the cam sealing groove 7, a stator blade groove 11 is opened inside the stator 1, a blade shaft 16 is arranged inside the stator blade groove 11, a blade 4 is arranged outside the blade shaft 16, a blade spring 9 is arranged outside the blade 4, and the blade spring 9 is fixedly connected to the inner wall of the stator 1.

[0016] In this embodiment, when used as an air pump, the cam rotor 2 is driven by an external force to rotate counterclockwise, and the cam and blade 4 of the cam rotor 2 divide the space formed by the stator 1 and the end cover 3 of the cam rotor 2 into a first working chamber 14 and a second working chamber 15. When the cam rotor 2 rotates counterclockwise, the volume of the second working chamber 15 gradually increases, so that air enters the second working chamber 15 through the second channel hole 6. At the same time, the volume of the first working chamber 14 gradually decreases, and the internal gas is discharged from the first channel hole 5. When the cam rotor 2 continues to rotate, the top of the cam of the cam rotor 2 presses the blade 4 into the stator blade slot 11. After the blade 4 squeezes all the gas out of the first working chamber 14 through the first channel hole 5, the blade 4 closes the first channel hole 5. When the cam rotor 2 continues to rotate, after the top of the cam of the cam rotor 2 passes over the stator blade slot 11, under the action of the blade spring 9, the non-fixed end of the blade 4 quickly recovers and presses on the surface of the cam rotor 2, and the space is divided into the first working chamber 14 and the second working chamber 15 again, and the next working cycle begins. Example

[0017] See also Figure 1-3 On the basis of the first embodiment, the present invention provides a technical solution: a pressure balance hole 13 is provided inside the cam rotor 2, the number of the pressure balance holes 13 is four, and the four pressure balance holes 13 are evenly distributed outside the cam rotor 2, a cam sealing strip 8 is provided inside the cam rotor 2, a first working chamber 14 is provided inside the stator 1, a second working chamber 15 is provided inside the stator 1, a stator end face sealing groove 12 is provided inside the stator 1, and the stator end face sealing groove 12 is located on the inner wall of the stator 1. It can be understood that the number of the pressure balance holes 13 is not limited to 4, and can also be other numbers.

[0018] In this embodiment, when used as a pneumatic motor, the cam rotor 2 rotates clockwise, and the cam top of the cam rotor 2 and the blade 4 divide the space into a first working chamber 14 and a second working chamber 15. When high-pressure gas enters through the first channel hole 5, the cam rotor rotates clockwise under the action of pressure, and the volume of the first working chamber 14 gradually increases, while the volume of the second working chamber 15 gradually decreases, and the internal gas is discharged through the second channel hole 6. When the cam rotor 2 continues to rotate, the cam top presses the blade 4 into the stator blade slot 11, and the blade 4 closes the first channel hole 5 and cuts off the high-pressure intake. When the rotor continues to rotate, after the cam top of the cam rotor 2 passes over the stator blade slot 11, the blade 4 is quickly pressed against the rotor surface at the non-fixed end under the joint action of the blade spring 9 and the high-pressure intake, and the working chamber is divided into the first working chamber 14 and the second working chamber 15 again, and the next working cycle begins.

[0019] Working principle and use process of the present invention: When used as an air pump, the cam rotor 2 is driven by an external force to rotate counterclockwise. The cam and blade 4 of the cam rotor 2 divide the space formed by the stator 1 and the end cover 3 of the cam rotor 2 into a first working chamber 14 and a second working chamber 15. When the cam rotor 2 rotates counterclockwise, the volume of the second working chamber 15 gradually increases, so that the air enters the second working chamber 15 through the second channel hole 6. At the same time, the volume of the first working chamber 14 gradually decreases, and the internal gas is discharged from the first channel hole 5. When the cam rotor 2 continues to rotate, the top of the cam of the cam rotor 2 presses the blade 4 into the stator blade slot 11. After the blade 4 squeezes all the gas out of the first working chamber 14 through the first channel hole 5, the blade 4 closes the first channel hole 5. When the cam rotor 2 continues to rotate, after the top of the cam of the cam rotor 2 passes over the stator blade slot 11, under the action of the blade spring 9, the non-fixed end of the blade 4 quickly recovers and presses on the surface of the cam rotor 2, and the space is divided into the first working chamber 14 and the second working chamber 15 again, and the next working cycle begins. When used as a pneumatic motor, the cam rotor 2 rotates clockwise, and the top of the cam of the cam rotor 2 and the blade 4 divide the space into the first working chamber 14 and the second working chamber 15. When the high-pressure gas enters through the first channel hole 5, the cam rotor rotates clockwise under the action of pressure, and the volume of the first working chamber 14 gradually increases, while the volume of the second working chamber 15 gradually decreases, and the internal gas is discharged through the second channel hole 6. When the cam rotor 2 continues to rotate, the top of the cam presses the blade 4 into the stator blade slot 11, and the blade 4 closes the first channel hole 5 and cuts off the high-pressure intake air. When the rotor continues to rotate, after the top of the cam of the cam rotor 2 passes over the stator blade slot 11, the blade 4 is quickly pressed against the rotor surface by the joint action of the blade spring 9 and the high-pressure intake air at the non-fixed end of the blade 4, and the working chamber is divided into the first working chamber 14 and the second working chamber 15 again, and the next working cycle begins.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cam pump capable of automatically compensating for wear, comprising a stator (1), characterized in that: End covers (3) are provided on both sides of the stator (1); a rotating shaft (10) is rotatably connected inside the stator (1); a cam rotor (2) is provided outside the rotating shaft (10); a cam sealing groove (7) is provided inside the cam rotor (2); a cam sealing strip (8) is provided inside the cam sealing groove (7); a stator blade groove (11) is provided inside the stator (1); a blade shaft (16) is provided inside the stator blade groove (11); a blade (4) is provided outside the blade shaft (16); a blade spring (9) is provided outside the blade (4); and the blade spring (9) is fixedly connected to the inner wall of the stator (1).

2. A cam pump capable of automatically compensating for wear according to claim 1, characterized in that: A first channel hole (5) is provided inside the stator (1), and a second channel hole (6) is provided inside the stator (1).

3. A cam pump capable of automatically compensating for wear according to claim 1, characterized in that: The cam rotor (2) is provided with pressure balancing holes (13) inside, the number of the pressure balancing holes (13) is four, and the four pressure balancing holes (13) are evenly distributed outside the cam rotor (2).

4. A cam pump capable of automatically compensating for wear according to claim 1, characterized in that: A cam sealing strip (8) is provided inside the cam rotor (2).

5. A cam pump capable of automatically compensating for wear according to claim 1, characterized in that: A first working chamber (14) is provided inside the stator (1), and a second working chamber (15) is provided inside the stator (1).

6. A cam pump capable of automatically compensating for wear according to claim 1, characterized in that: A stator end face sealing groove (12) is provided inside the stator (1), and the stator end face sealing groove (12) is located on the inner wall of the stator (1).

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