A fast oil filling and discharging structure for the transmission clutch of a high-power fracturing truck

Abstract

The present invention discloses a fast oil filling and discharging structure for a transmission clutch of a high-power fracturing truck, comprising a main shaft, gears axially connected to the main shaft, a hub body, a piston, and an oil cylinder. A spring cooperating with the piston is provided in the hub body; a first oil chamber is formed between the piston and the oil cylinder, and a second oil chamber is annularly provided in the piston. During operation, the pressure oil enters the first oil chamber and the second oil chamber respectively through the oil passage on the main shaft, and the piston is driven to move toward the hub body under the action of the pressure oil, thereby driving the spring to a predetermined working position; after the operation is completed, the pressure oil in the first oil chamber is depressurized, and the pressure oil entering the second oil chamber remains unchanged. When the first oil chamber is depressurized, the piston is driven to move toward the oil cylinder. The pressure oil in the second oil chamber generates a centrifugal force in the same direction as the rebound force required for the spring to reset during the movement of the piston, thereby effectively reducing the rebound force required for the spring to reset through the second oil chamber structure, thereby meeting the design requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of clutches, and in particular to a fast oil filling and discharging structure for a clutch in a transmission of a high-power fracturing truck. Background Art

[0002] The description of the background technology in the present invention belongs to the related technology related to the present invention and is only used to illustrate and facilitate the understanding of the invention content of the present invention. It should not be understood that the applicant explicitly believes or infers that the applicant believes that it is the prior art of the present invention on the filing date of the first application.

[0003] Fracturing trucks are specialized vehicles used to inject high-pressure, high-volume fracturing fluid into wells, disintegrating the formation and squeezing proppant into the cracks. They are primarily used for various fracturing operations in oil, gas, and water wells, but can also be used for hydraulic sandblasting, high-pressure hydraulic coal mining in coal mines, and high-pressure hydraulic rust removal on ships. The equipment can operate both standalone and in parallel. It primarily consists of a chassis, a platform engine, a platform gearbox, a fracturing pump, a manifold system, a lubrication system, an electrical system, a gas system, and a hydraulic system.

[0004] The transmission is a crucial component of a fracturing truck. Traditional transmission clutch structures typically rely solely on the rebound force of a return spring to reset the clutch piston and drain oil. However, some high-power transmissions require significant return spring force due to the high torque required. This, combined with the limited overall transmission space, makes it difficult to design a suitable spring. For example, a 2500-type fracturing truck requires a total input power of 2237 kW, an input speed of 1900 rpm, and an operating oil pressure of 1.6 MPa. Calculations indicate a maximum return spring force of 8200 Nm. Failure to design a suitable spring would hinder performance. Therefore, the present invention necessitates a fast clutch oil-filling and -discharging mechanism. Summary of the Invention

[0005] The purpose of the present invention is to provide a fast oil filling and discharging structure for the clutch of a high-power fracturing truck transmission, so as to solve the problem that the rebound force of the return spring required in the existing clutch is very large, resulting in the overall spatial layout of the transmission being limited and the spring design being difficult in actual use.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] A high-power fracturing truck transmission clutch rapid oil filling and discharging structure includes a main shaft, gears axially connected to the main shaft, a hub body, a piston, and an oil cylinder. The hub body is clearance-matched with one side of the piston. A spring is provided in the hub body to cooperate with the piston. The other side of the piston is cooperatively connected to the oil cylinder.

[0008] A first oil chamber is formed between the piston and the cylinder, and a second oil chamber is annularly opened in the piston. The volume of the first oil chamber is larger than that of the second oil chamber. An oil path communicating with the first oil chamber and the second oil chamber is provided on the main shaft.

[0009] When the present invention is working, the pressure oil enters the first oil chamber and the second oil chamber respectively through the oil path on the main shaft. The first oil chamber and the second oil chamber drive the piston to move in the direction close to the hub body under the action of the pressure oil. When the piston moves, it compresses the spring and drives the spring to a predetermined working position. After the work is completed, the pressure oil entering the first oil chamber is depressurized, and the pressure oil entering the second oil chamber remains unchanged. When the first oil chamber is depressurized, the piston is pushed to move and reset in the direction of the oil cylinder under the action of the rebound force of the spring. At this time, the direction of the centrifugal force generated by the pressure oil in the second oil chamber during the rotation is the same as the direction of the rebound force required for the spring to reset. Therefore, under the action of the centrifugal force of the pressure oil in the second oil chamber, the rebound force required for the spring to reset can be effectively reduced, thereby meeting the design requirements.

[0010] Furthermore, the oil circuit includes a first oil circuit axially opened on the main shaft, a second oil circuit radially opened on the main shaft and connected to the first oil circuit, a third oil circuit axially opened on the main shaft and adjacent to the first oil circuit, and a fourth oil circuit radially opened on the main shaft and connected to the third oil circuit. The first oil circuit and the third oil circuit are respectively connected to the oil holes on the main shaft, the second oil circuit is connected to the second oil chamber, and the fourth oil circuit is connected to the first oil chamber.

[0011] Furthermore, the second oil passage is perpendicular to the first oil passage, and the fourth oil passage is perpendicular to the third oil passage.

[0012] Furthermore, an annular protrusion is provided on one side of the hub body close to the piston, and an annular groove matching the annular protrusion is provided on one side of the piston close to the hub body.

[0013] The annular protrusion on the hub body of the present invention cooperates with the annular groove on the piston, so that the piston and the hub body can be in stable contact.

[0014] Furthermore, a first annular cavity and a second annular cavity are axially connected to each other on one side of the oil cylinder close to the piston. The volume of the first annular cavity is greater than the volume of the second annular cavity, and the side of the piston away from the hub body is cooperatively connected with the first annular cavity. The second annular cavity is located on the inner side of the oil cylinder and forms a first oil cavity with the piston.

[0015] Furthermore, sealing plugs are provided between the piston and the main shaft, and between the piston and the oil cylinder.

[0016] The sealing plug is used to ensure the sealing between the piston and the main shaft and between the piston and the cylinder.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention forms a first oil chamber between the piston and the oil cylinder, and a second oil chamber inside the piston. During operation, pressure oil enters the first oil chamber and the second oil chamber respectively through the oil path on the main shaft. The first oil chamber and the second oil chamber drive the piston to move in the direction close to the hub body under the action of the pressure oil. When the piston moves, it compresses the spring and drives the spring to a predetermined working position. After the work is completed, the pressure oil entering the first oil chamber is depressurized, and the pressure oil entering the second oil chamber remains unchanged. When the first oil chamber is depressurized, the piston is pushed to move and reset in the direction of the oil cylinder under the action of the rebound force of the spring. At this time, the direction of the centrifugal force generated by the pressure oil in the second oil chamber during the rotation is the same as the direction of the rebound force required for the spring to reset. Therefore, under the action of the centrifugal force of the pressure oil in the second oil chamber, the rebound force required for the spring to reset can be effectively reduced. The rebound force of the required reset spring is reduced by the structure of the second oil chamber in the piston, thereby meeting the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the fast oil filling and discharging structure of the transmission clutch of a high-power fracturing truck;

[0020] Figure 2 This is a schematic diagram of the working state of the fast oil filling and discharging structure of the transmission clutch of a high-power fracturing truck;

[0021] Figure 3 This is a schematic diagram of the oil leakage state of the fast oil filling and discharging structure of the transmission clutch of a high-power fracturing truck.

[0022] In the figure: 1-main shaft, 2-gear;

[0023] 3-hub body, 31-annular protrusion;

[0024] 4-piston, 41-second oil chamber, 42-annular groove;

[0025] 5-oil cylinder, 51-first oil chamber, 6-spring;

[0026] 7- oil circuit, 71- first oil circuit, 72- second oil circuit, 73- third oil circuit, 74- fourth oil circuit;

[0027] 8-Sealing plug. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0029] like Figures 1 to 3As shown, the present invention provides a fast oil filling and discharging structure of the transmission clutch of a high-power fracturing truck, comprising a main shaft 1, a gear 2 axially connected to the main shaft 1, a hub body 3, a piston 4, and a cylinder 5. The hub body 3 is clearance-matched with one side of the piston 4, a spring 6 cooperating with the piston 4 is provided in the hub body 3, and the other side of the piston 4 is cooperating with the cylinder 5; the gear 2 is located on the side of the hub body 3 away from the piston 4, and an annular protrusion 31 is provided on the side of the hub body 3 close to the piston 4, and an annular groove 42 cooperating with the annular protrusion 31 is provided on the side of the piston 4 close to the hub body 3, so as to facilitate stable contact between the piston 4 and the hub body 3; a first annular cavity and a second annular cavity connected to each other are axially opened on the side of the cylinder 5 close to the piston 4, the volume of the first annular cavity is greater than that of the second annular cavity, and the side of the piston 4 away from the hub body 3 is cooperating with the first annular cavity, the second annular cavity is located on the inner side of the cylinder 5 and forms a first oil cavity 51 with the piston 4.

[0030] Sealing plugs 8 are provided between the piston 4 and the main shaft 1, and between the piston 4 and the oil cylinder 5. Specifically, the sealing plug 8 between the piston 4 and the oil cylinder 5 is located between the outer side of the piston 4 away from the main shaft 1 and the inner wall of the first annular cavity, and the sealing plug 8 between the piston 4 and the main shaft 1 is located between the inner side of the piston 4 close to the main shaft 1 and the outer wall of the main shaft 1. By providing the sealing plugs 8, closed cavities are formed between the piston 4 and the main shaft 1, and between the piston 4 and the oil cylinder 5, thereby ensuring the sealing of the first oil chamber 51 and the second oil chamber 41.

[0031] A first oil chamber 51 is formed between the piston 4 and the cylinder 5, and a second oil chamber 41 is annularly opened in the piston 4. The volume of the first oil chamber 51 is larger than that of the second oil chamber 41. An oil circuit 7 communicating with the first oil chamber 51 and the second oil chamber 41 is provided on the main shaft 1; the oil circuit 7 includes a first oil circuit 71 axially opened on the main shaft 1, a second oil circuit 72 radially opened on the main shaft 1 and communicating with the first oil circuit 71, a third oil circuit 73 axially opened on the main shaft 1 and adjacent to the first oil circuit 71, and a fourth oil circuit 74 radially opened on the main shaft 1 and communicating with the third oil circuit 73. The first oil circuit 71 and the third oil circuit 73 are respectively communicated with the oil holes on the main shaft 1, the second oil circuit 72 is communicated with the second oil chamber 41, and the fourth oil circuit 74 is communicated with the first oil chamber 51. Among them, the second oil circuit 72 is perpendicular to the first oil circuit 71, the third oil circuit 73 is parallel to the first oil circuit 71, the fourth oil circuit 74 is perpendicular to the third oil circuit 73, and the fourth oil circuit 74 is parallel to the second oil circuit 72. The main shaft 1 has an oil hole connected to the first oil circuit 71 and the third oil circuit 73 to facilitate the input of pressure oil.

[0032] The high-power fracturing truck transmission clutch quick oil filling and discharging structure of the present invention, when working, the pressure oil enters the first oil circuit 71 and the third oil circuit 73 of the oil circuit 7 through the oil holes on the main shaft 1 respectively, the pressure oil entering the first oil circuit 71 enters the second oil chamber 41 through the second oil circuit 72, and the pressure oil entering the third oil circuit 73 enters the first oil chamber 51 through the fourth oil circuit 74. The first oil chamber 51 and the second oil chamber 41 drive the piston 4 to move toward the direction close to the hub body 3 under the action of the pressure oil. When the piston 4 moves toward the direction close to the hub body 3, it pushes and compresses the spring 6, thereby driving the spring 6 to reach a predetermined working position.

[0033] After the work is completed, the pressure oil entering the first oil chamber 51 is relieved, and the pressure oil entering the second oil chamber 41 remains unchanged. When the first oil chamber 51 is relieved, the piston 4 will be pushed to move and reset in the direction of the cylinder 5 under the action of the rebound force of the spring 6. At this time, the direction of the centrifugal force generated by the pressure oil in the second oil chamber 41 during the rotation is the same as the direction of the rebound force required for the spring 6 to reset. At this time, the required rebound force of the spring 6 is equal to the pressure of the first oil chamber 51 acting on the piston 4 minus the centrifugal force of the second oil chamber 41. Therefore, under the action of the centrifugal force of the pressure oil in the second oil chamber 41, the required rebound force for the spring 6 to reset can be effectively reduced. The rebound force of the required reset spring 6 is reduced by the structure of the second oil chamber 41 in the piston 4, thereby meeting the design requirements and ensuring that the structural parts are not damaged while achieving rapid charging and discharging of the pressure oil.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-power fracturing truck transmission clutch rapid oil filling and discharging structure, characterized in that: It comprises a main shaft (1), a gear (2) axially connected to the main shaft (1), a hub (3), a piston (4), and an oil cylinder (5); the hub (3) is clearance-matched with one side of the piston (4); a spring (6) is provided in the hub (3) and matches the piston (4); the other side of the piston (4) is matched with the oil cylinder (5); A first oil chamber (51) is formed between the piston (4) and the oil cylinder (5); a second oil chamber (41) is annularly formed inside the piston (4); the volume of the first oil chamber (51) is greater than the volume of the second oil chamber (41); and an oil passage (7) communicating with the first oil chamber (51) and the second oil chamber (41) is provided on the main shaft (1); The oil circuit (7) comprises a first oil circuit (71) axially opened on the main shaft (1), a second oil circuit (72) radially opened on the main shaft (1) and connected to the first oil circuit (71), a third oil circuit (73) axially opened on the main shaft (1) and adjacent to the first oil circuit (71), and a fourth oil circuit (74) radially opened on the main shaft (1) and connected to the third oil circuit (73), the first oil circuit (71) and the third oil circuit (73) being respectively connected to the oil holes on the main shaft (1), the second oil circuit (72) being connected to the second oil chamber (41), and the fourth oil circuit (74) being connected to the first oil chamber (51); An annular protrusion (31) is provided on a side of the hub body (3) close to the piston (4), and an annular groove (42) is provided on a side of the piston (4) close to the hub body (3) to cooperate with the annular protrusion (31); A first annular cavity and a second annular cavity are axially opened on a side of the oil cylinder (5) close to the piston (4), the volume of the first annular cavity is greater than the volume of the second annular cavity, and a side of the piston (4) away from the hub body (3) is cooperatively connected with the first annular cavity, and the second annular cavity is located on the inner side of the oil cylinder (5) and forms the first oil cavity (51) with the piston (4).

2. The high-power fracturing truck transmission clutch rapid oil filling and discharging structure according to claim 1 is characterized in that: The second oil circuit (72) and the first oil circuit (71) are perpendicular to each other, and the fourth oil circuit (74) and the third oil circuit (73) are perpendicular to each other.

3. The high-power fracturing truck transmission clutch rapid oil filling and discharging structure according to claim 1 is characterized in that: A sealing ring (8) is provided between the piston (4) and the main shaft (1), and between the piston (4) and the oil cylinder (5).

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