Three-screw pump for viscous lubricating grease flow

Abstract

The three-screw pump comprises a base, a pump body is installed at the top end of the base, a screw mechanism penetrates through the middle of the pump body in a rotating mode, a valve body is installed on one side of the pump body, a valve rod is installed on the side face of the valve body, a suction mechanism is installed at the front end of the pump body, and a valve rod is installed on the valve rod. A discharge pipe is mounted on the other side of the pump body; the screw rod mechanism comprises a main screw rod and an auxiliary screw rod, and the main screw rod is rotatably inserted into the pump body. The bearing cover and the sealing ring are used for sealing the joint between the main screw and the pump body, the sealing performance of the three-screw pump is improved, the bearing is externally arranged outside the pump body through the bearing cover and is convenient to disassemble, maintain and replace, the suction pipe is installed on the other side of the pump body through the connecting plate, and the suction pipe is of an L-shaped structure and is vertically arranged, so that the sealing performance of the three-screw pump is improved. And the three-screw pump is convenient to disassemble and assemble, so that the three-screw pump has a vertical feeding mode, and thick lubricating grease can smoothly enter the three-screw pump.

Description

Technical Field

[0001] This utility model relates to the field of three-screw pump technology, and in particular to a three-screw pump for viscous grease processes. Background Technology

[0002] Viscous grease is colloid-like at room temperature, extremely viscous, and has almost no fluidity. During the production process, it's inevitable that air bubbles and moisture will be mixed in, forming bubbles. Some greases, due to incomplete dehydration or other reasons, may also contain trace amounts of moisture, leading to problems and potential hazards in the appearance, storage, and use of the finished grease. If the grease is used to lubricate precision transmission components under actual operating conditions, the air bubbles or moisture inside could potentially damage the device. Applying the excellent high vacuum properties of the three-screw pump inlet to the grease degassing and dehydration process should be well-suited. The three-screw pump is a positive displacement pump. Due to the meshing of the screws and the tight fit between the screws and the inner wall of the bushing, one or more sealed spaces are created between the pump's suction and discharge ports. As the screws rotate and mesh, these sealed spaces continuously form at the pump's suction end, sealing the liquid in the suction chamber within them. The liquid is then continuously pushed from the suction chamber along the screw axis to the discharge end, continuously discharging the liquid enclosed in each space.

[0003] In existing viscous grease processes, the connection and use of three-screw pumps are not convenient enough, making it difficult to vertically feed viscous grease, which can lead to grease buildup and blockage. Moreover, leaks are prone to occur during screw rotation, indicating insufficient sealing performance.

[0004] Therefore, it is proposed to use a three-screw pump in the viscous grease process to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned technical problems by providing a three-screw pump for viscous grease processes, which features vertical feeding, a metal bellows mechanical seal, and externally mounted bearings.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a three-screw pump for viscous grease flow, including a base, a pump body mounted on the top of the base, a screw mechanism rotating through the middle of the pump body, a valve body mounted on one side of the pump body, a valve stem mounted on the side of the valve body, a suction mechanism mounted on the front end of the pump body, and a discharge pipe mounted on the other side of the pump body;

[0007] The screw mechanism includes a main screw and a driven screw. The main screw is rotatably inserted into the interior of the pump body, and the driven screw is engaged on both sides of the main screw.

[0008] Preferably, the inhalation mechanism includes an inhalation tube, the bottom end of which is fixed with a connecting plate. The connecting plate is a circular flange structure and is vertically disposed at one end of the pump body. Bolts are connected between the edge of the connecting plate and one side of the pump body. The bottom end of the inhalation tube is tightly connected and communicates with one end of the pump body through the connecting plate.

[0009] Preferably, the suction pipe has an L-shaped structure and is vertically arranged, which allows the three-screw pump to have a vertical feeding method, making it easy for viscous grease to enter the interior of the three-screw pump smoothly.

[0010] Preferably, a cover plate is installed at the top of the pump body, and a first support strip is fixed between the bottom end of the cover plate and the base, and the pump body is horizontally arranged.

[0011] Preferably, the outer end of the main screw tightly rotates through the other side of the pump body, a bearing cover is tightly installed on the outer side of the pump body, and a bearing that limits the main screw is installed inside the bearing cover. Both the main screw and the driven screw are horizontally arranged. The main screw is a left-hand screw structure, and the driven screw is a right-hand screw structure. The two are meshed and connected for transmission.

[0012] Preferably, the outer end of the main screw tightly rotates through the bearing cover, and a sealing ring is connected to the inner surface of the bearing cover. The sealing ring adopts a metal bellows mechanical seal structure and is tightly fitted onto the surface of the main screw. The sealing ring has high temperature resistance and is suitable for conveying high-temperature viscous lubricating grease media.

[0013] Preferably, a motor is installed at the outer end of the main screw. The motor is connected to an external power source through a wire to drive the main screw to rotate. It has a built-in switch to start and stop the motor. A second support bar is fixed between the bottom end of the motor and the base.

[0014] Compared with the prior art, this utility model provides a three-screw pump for viscous grease processes, which has the following advantages:

[0015] 1. This utility model improves the sealing performance of the three-screw pump by setting a screw mechanism inside the pump body and setting a bearing cover between the pump body and the motor on the outside of the pump body. During the process of the motor driving the main screw and the driven screw to mesh and rotate, the bearing cover and sealing ring seal the connection between the main screw and the pump body, thereby improving the sealing performance of the three-screw pump. Moreover, the bearing is placed outside the pump body through the bearing cover, which facilitates disassembly, maintenance and replacement.

[0016] 2. In this utility model, by installing a suction pipe on the other side of the pump body via a connecting plate, the suction pipe is L-shaped and vertically arranged, and is easy to disassemble and install, thereby enabling the three-screw pump to have a vertical feeding method, which facilitates the smooth entry of viscous grease into the interior of the three-screw pump.

[0017] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the three-screw pump for the viscous grease process proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the screw mechanism of the three-screw pump for viscous grease flow proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the bearing cover and sealing ring of the three-screw pump for viscous grease flow proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the suction pipe section of the three-screw pump for the viscous grease process proposed in this utility model.

[0022] In the diagram: 1. Base; 2. Motor; 3. Bearing cover; 4. Second support bar; 5. Valve body; 6. Valve stem; 7. First support bar; 8. Bolt; 9. Connecting plate; 10. Suction pipe; 11. Cover plate; 12. Pump body; 13. Discharge pipe; 14. Main screw; 15. Driven screw; 16. Sealing ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Example 1: Three-screw pump for viscous grease process, such as Figures 1-4As shown, the device includes a base 1, a pump body 12 mounted on the top of the base 1, a screw mechanism rotating through the middle of the pump body 12, a valve body 5 mounted on one side of the pump body 12, a valve stem 6 mounted on the side of the valve body 5, a suction mechanism mounted on the front end of the pump body 12, and a discharge pipe 13 mounted on the other side of the pump body 12 for discharging viscous grease.

[0026] The screw mechanism includes a main screw 14 and a driven screw 15. The main screw 14 is rotatably inserted into the pump body 12. The driven screw 15 is meshed and installed on both sides of the main screw 14. Both the main screw 14 and the driven screw 15 are wrapped in bushings inside the pump body 12 and are in close contact. The main screw 14 is a left-hand screw structure, and the driven screw 15 is a right-hand screw structure. The two are meshed and connected for transmission.

[0027] In use, a screw mechanism is installed inside the pump body 12, and a bearing cover 3 is installed between the pump body 12 and the motor 2 on the outside. During the rotation of the main screw 14 and the driven screw 15 driven by the motor 2, viscous grease enters the pump body 12 from the suction pipe 10. Inside the pump body 12, due to the mutual meshing of the main screw 14 and the two driven screws 15 and the tight fit between the three screws and the inner wall of the liner pump body 12, one or more sealed spaces are separated between the suction port and the discharge port of the pump body 12. As the main screw 14 and the driven screw 15 rotate and mesh, the sealed space inside the pump body 12 is continuously formed at the suction end of the pump body 12, sealing the liquid in the suction chamber into it, and continuously pushing it from the suction chamber along the axial direction of the main screw 14 to the discharge end, continuously discharging the liquid sealed in each space. The viscous grease is discharged from the pump body 12 from the discharge pipe 13.

[0028] Example 2: Three-screw pump for viscous grease process, such as Figures 1-4 As shown, the suction mechanism includes a suction pipe 10, through which the high-temperature viscous grease enters the pump body 12. A connecting plate 9 is fixed to the bottom end of the suction pipe 10. The connecting plate 9 is a circular flange structure and is vertically set at one end of the pump body 12. Bolts 8 are connected between the edge of the connecting plate 9 and one side of the pump body 12. Therefore, the bottom end of the suction pipe 10 is tightly connected and communicated with one end of the pump body 12 through the connecting plate 9, ensuring that the viscous grease enters the pump body 12 without leakage.

[0029] The suction pipe 10 has an L-shaped structure and is set vertically, which allows the three-screw pump to have a vertical feeding method, making it easy for viscous grease to enter the interior of the three-screw pump smoothly.

[0030] A cover plate 11 is installed at the top of the pump body 12, and a first support bar 7 is fixed between its bottom end and the base 1. The pump body 12 is set horizontally.

[0031] The outer end of the main screw 14 rotates tightly through the other side of the pump body 12. The bearing cover 3 is tightly installed on the outer side of the pump body 12. The bearing is externally mounted on the outside of the pump body 12 through the bearing cover 3, which facilitates disassembly, maintenance and replacement. Both the main screw 14 and the driven screw 15 are set horizontally.

[0032] The outer end of the main screw 14 rotates tightly through the bearing cover 3. The bearing cover 3 is equipped with a bearing that limits the main screw 14. A sealing ring 16 is connected to the inner surface of the bearing cover 3. The sealing ring 16 adopts a metal bellows mechanical seal structure and is tightly fitted onto the surface of the main screw 14. The sealing ring 16 has high temperature resistance and is suitable for conveying high-temperature viscous grease media.

[0033] A motor 2 is installed at the outer end of the main screw 14. The motor 2 is connected to an external power source through a wire, thereby driving the main screw 14 to rotate. It has a built-in switch to start and stop the motor 2. A second support bar 4 is fixed between the bottom end of the motor 2 and the base 1. The pump body 12 and the motor 2 are stably fixed at the top of the base 1 through the first support bar 7 and the second support bar 4, respectively, thereby maintaining a stable installation connection between the pump body 12 and the motor 2.

[0034] During use, the bearing cover 3 and the sealing ring 16 seal the connection between the main screw 14 and the pump body 12, improving the sealing performance of the three-screw pump. In addition, the bearing is externally mounted on the pump body 12 through the bearing cover 3, which facilitates disassembly, maintenance and replacement.

[0035] By installing a suction pipe 10 on the other side of the pump body 12 via a connecting plate 9, and by installing an L-shaped suction pipe 10 vertically, which is easy to disassemble and install, the three-screw pump can be made to have a vertical feeding method, which facilitates the smooth entry of viscous grease into the three-screw pump.

[0036] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A three-screw pump for viscous grease processes, comprising a base (1), characterized in that: A pump body (12) is installed at the top of the base (1). A screw mechanism rotates through the middle of the pump body (12). A valve body (5) is installed on one side of the pump body (12). A valve stem (6) is installed on the side of the valve body (5). A suction mechanism is installed at the front end of the pump body (12). A discharge pipe (13) is installed on the other side of the pump body (12). The screw mechanism includes a main screw (14) and a driven screw (15). The main screw (14) is rotatably inserted into the interior of the pump body (12), and the driven screw (15) is engaged on both sides of the main screw (14).

2. The three-screw pump for viscous grease processes according to claim 1, characterized in that, The inhalation mechanism includes an inhalation tube (10), the bottom end of which is fixed with a connecting plate (9), and the edge of the connecting plate (9) is connected to one side of the pump body (12) with a bolt (8).

3. The three-screw pump for viscous grease processes according to claim 2, characterized in that, The inhalation tube (10) has an L-shaped structure and is vertically arranged.

4. The three-screw pump for viscous grease processes according to claim 1, characterized in that, The pump body (12) is equipped with a cover plate (11) at the top and a first support bar (7) is fixed between its bottom end and the base (1). The pump body (12) is set horizontally.

5. The three-screw pump for viscous grease processes according to claim 1, characterized in that, The outer end of the main screw (14) rotates tightly through the other side of the pump body (12), and a bearing cover (3) is tightly installed on the outer side of the pump body (12). The main screw (14) and the slave screw (15) are both horizontally arranged.

6. The three-screw pump for viscous grease processes according to claim 5, characterized in that, The outer end of the main screw (14) rotates tightly through the bearing cover (3), and the inner surface of the bearing cover (3) is connected to a sealing ring (16). The sealing ring (16) adopts a metal bellows mechanical seal structure and is tightly fitted onto the surface of the main screw (14).

7. The three-screw pump for viscous grease processes according to claim 1, characterized in that, A motor (2) is installed at the outer end of the main screw (14), and a second support bar (4) is fixed between the bottom end of the motor (2) and the base (1).

Images