Oil cylinder for controlling engagement and locking of synchronous automatic clutch

Abstract

The utility model relates to an oil cylinder for controlling engagement and locking of a synchronous automatic clutch, and aims to solve the problems that the synchronous automatic clutch is frequently engaged and disengaged and the starting test of a unit is prolonged when a cogeneration NCB unit is started in a cold state. The shifting fork is clamped between the two pistons, the piston at the left end is in sliding connection with the oil cavity I. The shifting fork is in sliding connection with the shifting fork movable cavity, a window allowing a plug of the shifting fork to stretch out is formed in the side wall of the shifting fork movable cavity, and the plug of the shifting fork is used for shifting a clutch locking gear ring. The piston at the right end is in sliding connection with the oil cavity II, the left end of the oil cylinder body penetrates into the in-cylinder connecting pipe, the piston at the left end is provided with a piston inner oil way, a shifting fork inner main oil way is arranged in the middle of the shifting fork, the in-cylinder connecting pipe is inserted into the piston inner oil way, and the piston inner oil way is communicated with the shifting fork inner main oil way. And the high-medium-pressure rotor can always drag the low-pressure rotor to rotate.

Description

Technical Field

[0001] The utility model relates to the field of oil cylinders, in particular to an oil cylinder for controlling the engagement and locking of a synchronous automatic clutch, in particular to an oil cylinder for pushing a locking gear ring to control the engagement and locking of a synchronous automatic clutch. Background Art

[0002] The synchronous automatic clutch is a high-power density, high-reliability gear clutch that automatically engages and disengages by relying on the speed changes of the input and output ends. It has been widely used in transmission fields such as ships, metallurgy, chemical industry, and power generation. The synchronous automatic clutch can realize the online input and output of the power unit, especially in the dual power switching or parallel system, which can improve the operating flexibility of the unit. In the combined gas-steam cycle NCB generator set and some other special transmission systems, the clutch is required to have an engagement locking function, that is, to lock the clutch in the engaged state. After engagement and locking, even if the output speed of the synchronous automatic clutch is higher than the input speed, the clutch will not automatically disengage. For example, in the cogeneration NCB unit, its layout is: generator, high and medium pressure rotor of steam turbine, synchronous automatic clutch, and low pressure rotor of steam turbine. When the unit's heat load demand is high, the turbine low-pressure rotor shuts down, the synchronous automatic clutch automatically disengages, the turbine high and medium pressure rotors continue to drive the generator to generate electricity, and the exhaust steam from the high and medium pressure cylinders is all used for heating; when the unit's power load demand is high, the turbine low-pressure rotor starts and speeds up to the rated speed, the synchronous automatic clutch automatically engages, the exhaust steam from the turbine high and medium pressure cylinders all enters the turbine low-pressure cylinder to perform work, and the turbine low-pressure rotor and high and medium pressure rotors drive the generator together, thereby maximizing the unit's power generation.

[0003] When this type of unit is started in cold state, the high and medium pressure rotors of the steam turbine need to be started together with the low pressure rotor. However, due to the insufficient exhaust capacity of the high and medium pressure cylinders of the steam turbine during cold start, there is not enough steam flow entering the low pressure rotor of the steam turbine, which will cause the speed of the low pressure rotor of the steam turbine to fluctuate or fail to follow the speed of the high and medium pressure rotors of the steam turbine in time. The synchronous automatic clutch installed between the high and medium pressure rotors and the low pressure rotor will frequently engage and disengage or be disengaged all the time, which increases the operating safety risks of the synchronous automatic clutch and significantly prolongs the start-up time of the unit.

[0004] In summary, when the cogeneration NCB unit is cold started, the low-pressure rotor speed of the turbine fluctuates and cannot follow the high- and medium-pressure rotor speed of the turbine in time, resulting in frequent engagement and disengagement of the synchronous automatic clutch and prolonged unit start-up test. Utility Model Content

[0005] In order to solve the problems of frequent engagement and disengagement of the synchronous automatic clutch and prolonged unit start-up test caused by the fluctuation of the low-pressure rotor speed of the steam turbine and the inability to timely follow the high- and medium-pressure rotor speed of the steam turbine when the cogeneration NCB unit is cold started, the utility model proposes an oil cylinder for controlling the engagement and locking of the synchronous automatic clutch.

[0006] The utility model is realized by the following scheme: an oil cylinder for controlling the engagement and locking of a synchronous automatic clutch, the oil cylinder is installed on an oil cylinder bracket in a device box and arranged on the side of a rotating clutch locking gear ring, the oil cylinder is controlled to operate by a pressure oil source, and the oil cylinder is used to drive the clutch locking gear ring to move and change its axial position;

[0007] The oil cylinder comprises an oil cylinder body, a shift fork, an in-cylinder connecting pipe and two pistons;

[0008] A cavity is provided in the cylinder body, and the piston is slidably connected to the cavity. The gap between each side of the piston and the cavity forms an oil cavity. Each oil cavity is connected to an oil port provided in the cylinder body. An internal oil path is provided at one end of the piston. One end of the cylinder body is penetrated into the internal connecting pipe of the cylinder, and the other end of the internal connecting pipe of the cylinder is connected to the internal oil path of the piston.

[0009] The oil chamber I, the shift fork movable chamber and the oil chamber II are arranged in sequence from left to right in the oil cylinder body. The oil chamber I is communicated with the oil port I arranged at the left end of the oil cylinder body, and the oil chamber II is communicated with the oil port II arranged at the right end of the oil cylinder body. The shift fork is clamped between the two pistons. The piston at the left end is slidably connected with the oil chamber I, and the shift fork is slidably connected with the shift fork movable chamber. The side wall of the shift fork movable chamber has a window for the shift fork plug to extend out. The shift fork plug is used to shift the clutch locking gear ring. The piston at the right end is slidably connected with the oil chamber II. The left end of the oil cylinder body penetrates the cylinder connecting pipe. The piston at the left end is provided with a piston internal oil circuit. The middle part of the shift fork is provided with a shift fork internal total oil circuit. The cylinder connecting pipe is inserted into the piston internal oil circuit, and the piston internal oil circuit is communicated with the shift fork internal total oil circuit.

[0010] The oil cylinder is connected with an oil circuit control component, which includes a pressure oil source, an oil source circuit, a lubricating oil circuit, a pre-valve working oil circuit, a post-valve working oil circuit I, a post-valve working oil circuit II and a two-position four-way valve;

[0011] The pressure oil source is connected to the pressure oil source through the lubricating oil circuit and the pressure oil source is connected to the pressure oil source through the working oil circuit before the valve. The pressure oil source is connected to the connecting pipe in the cylinder through the lubricating oil circuit. The pressure oil source is connected to the p end of the two-position four-way valve through the working oil circuit before the valve. The oil port I is connected to the A end of the two-position four-way valve through the working oil circuit I after the valve. The oil port II is connected to the B end of the two-position four-way valve through the working oil circuit II after the valve. The oil source circuit is connected to the T end of the two-position four-way valve.

[0012] When working, the lubricating oil of the pressure oil source flows from the pressure oil source through the lubricating oil circuit and the connecting pipe in the cylinder to the main oil circuit in the shift fork, and the lubricating oil is applied to the clutch locking gear ring. When the P end and the A end of the two-position four-way valve are connected, the B end and the T end of the two-position four-way valve are connected, and the lubricating oil of the pressure oil source enters the oil chamber I through the pressure oil source through the working oil circuit before the valve, the working oil circuit I after the valve and the oil port I to push the two pistons to move to the right, and the lubricating oil of the oil chamber II flows to the oil source circuit through the oil port II and the working oil circuit II after the valve;

[0013] When the P end and B end of the two-position four-way valve are connected, the A end and T end of the two-position four-way valve are connected, and the lubricating oil of the pressure oil source enters the oil chamber II through the pressure oil source through the working oil circuit before the valve, the working oil circuit II after the valve and the oil port II to push the two pistons to move to the left, and the lubricating oil of the oil chamber I flows to the oil source circuit through the oil port I and the working oil circuit I after the valve.

[0014] Furthermore, the gap seal is relied on between the piston at the left end and the oil chamber I, and between the piston at the right end and the oil chamber II.

[0015] Furthermore, the oil pipe connected in the cylinder is fixed to the cylinder body, and the oil pipe connected in the cylinder is connected to the piston at the left end in a clearance sliding manner.

[0016] Furthermore, the shift fork is provided with an internal oil distribution circuit, the inlet end of the internal oil distribution circuit of the shift fork is connected to the main oil circuit of the shift fork, and the outlet end of the internal oil distribution circuit of the shift fork faces the clutch locking gear ring. The internal oil distribution circuit of the shift fork is used to apply the lubricating oil of the main oil circuit of the shift fork to the clutch locking gear ring.

[0017] Furthermore, an anti-rotation pin is provided in the movable cavity of the shift fork, and the shift fork is slidably connected to the anti-rotation pin.

[0018] Furthermore, proximity switch I and proximity switch II are installed on the upper end of the cylinder body, and a trigger block is installed on the fork. When the fork moves to the unlocking position, proximity switch I sends a signal, and when the fork moves to the locking position, proximity switch II sends a signal. Proximity switch I and proximity switch II are used to respond to the working position of the fork.

[0019] The beneficial effects of the utility model are:

[0020] The oil cylinder of this scheme is an integrated oil cylinder, which provides the working force for the shift fork to push the high-speed rotating parts while providing sufficient lubrication for the friction surface with high linear speed, so that the oil cylinder can meet the working requirement of pushing the clutch locking ring when the synchronous automatic clutch is running at high speed. The oil cylinder can push the locking ring to lock the synchronous automatic clutch in the engaged state after it is engaged. Even if the speed of the low-pressure rotor at the input end of the synchronous automatic clutch is lower than the speed of the high- and medium-pressure rotors at the output end, the synchronous automatic clutch will not disengage. Regardless of whether the steam supply to the low-pressure rotor of the turbine is sufficient, the high- and medium-pressure rotors of the turbine can always drag the low-pressure rotor of the turbine to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a clutch connection for a cylinder that controls the engagement and locking of a synchronous automatic clutch;

[0022] Figure 2 A schematic diagram of the oil circuit connection of an oil cylinder for controlling the engagement and locking of a synchronous automatic clutch;

[0023] Figure 3 The present invention is a schematic diagram of a cylinder body of an oil cylinder for controlling the engagement and locking of a synchronous automatic clutch. DETAILED DESCRIPTION

[0024] Specific implementation method 1: A cylinder for controlling the engagement and locking of a synchronous automatic clutch, wherein the cylinder 100 is mounted on a cylinder support 2 in a device housing 1 and arranged on the side of a rotating clutch locking gear ring 200, and the cylinder 100 is controlled to operate by a pressure oil source, and the cylinder 100 is used to drive the clutch locking gear ring 200 to move and change its axial position; it is characterized in that:

[0025] The oil cylinder 100 comprises an oil cylinder body 110, a shift fork 120, an in-cylinder connecting pipe 140 and two pistons 130;

[0026] A cavity is provided in the cylinder body 110, and the piston 130 is slidably connected to the cavity. The gap between each side of the piston 130 and the cavity forms an oil cavity, and each oil cavity is connected to an oil port provided in the cylinder body 110. One end of the piston 130 is provided with a piston inner oil path 131. One end of the cylinder body 110 penetrates into the cylinder inner connecting pipe 140, and the other end of the cylinder inner connecting pipe 140 is connected to the piston inner oil path 131.

[0027] The oil chamber Ⅰ, the shift fork movable chamber and the oil chamber Ⅱ are arranged in sequence from left to right in the oil cylinder body 110. The oil chamber Ⅰ is connected with the oil port Ⅰ arranged at the left end of the oil cylinder body 110, and the oil chamber Ⅱ is connected with the oil port Ⅱ arranged at the right end of the oil cylinder body 110. The shift fork 120 is sandwiched between two pistons 130. The piston 130 at the left end is slidably connected with the oil chamber Ⅰ, and the shift fork 120 is slidably connected with the shift fork movable chamber. The side wall of the shift fork movable chamber has a plug for the shift fork 120 to extend out. The plug of the shift fork 120 is used to shift the clutch locking gear ring 200. The piston 130 at the right end is slidably connected with the oil chamber II. The left end of the oil cylinder body 110 penetrates into the cylinder connecting pipe 140. The piston 130 at the left end is provided with a piston internal oil circuit 131. The middle part of the shift fork 120 is provided with a shift fork internal total oil circuit 121. The cylinder connecting pipe 140 is inserted into the piston internal oil circuit 131. The piston internal oil circuit 131 is communicated with the shift fork internal total oil circuit 121.

[0028] The oil cylinder 100 is connected to an oil circuit control assembly, which includes a pressure oil source 300, an oil source circuit, a lubricating oil circuit 340, a pre-valve working oil circuit 350, a post-valve working oil circuit I 360, a post-valve working oil circuit II 370 and a two-position four-way valve;

[0029] The pressure oil source is connected to the pressure oil source 300 through the lubricating oil circuit 340 and the pressure oil source through the pre-valve working oil circuit 350. The pressure oil source is connected to the cylinder connecting pipe 140 through the lubricating oil circuit 340. The pressure oil source is connected to the p end of the two-position four-way valve through the pre-valve working oil circuit 350. The oil port I is connected to the A end of the two-position four-way valve through the post-valve working oil circuit I 360. The oil port II is connected to the B end of the two-position four-way valve through the post-valve working oil circuit II 370. The oil source circuit is connected to the T end of the two-position four-way valve.

[0030] When working, the lubricating oil of the pressure oil source 300 flows from the pressure oil source through the lubricating oil path 340 and the connecting pipe 140 in the cylinder to the main oil path 121 in the shift fork, and the lubricating oil is applied to the clutch locking gear ring 200. When the P end and the A end of the two-position four-way valve are connected, the B end and the T end of the two-position four-way valve are connected, and the lubricating oil of the pressure oil source 300 enters the oil chamber I through the pressure oil source through the pre-valve working oil path 350, the post-valve working oil path I 360 and the oil port I to push the two pistons 130 to move to the right, and the lubricating oil of the oil chamber II flows to the oil source circuit through the oil port II and the post-valve working oil path II 370;

[0031] When the P end and B end of the two-position four-way valve are connected, the A end and T end of the two-position four-way valve are connected, and the lubricating oil of the pressure oil source 300 enters the oil chamber II through the pressure oil source through the pre-valve working oil circuit 350, the post-valve working oil circuit II 370 and the oil port II to push the two pistons 130 to move to the left, and the lubricating oil of the oil chamber I flows to the oil source circuit through the oil port I and the post-valve working oil circuit I 360.

[0032] In this embodiment:

[0033] like Figure 1 As shown, the oil cylinder is installed on the oil cylinder bracket in the equipment box and arranged on the side of the rotating clutch locking gear ring. The shift fork moves left and right to push the clutch locking gear ring to change its axial position. Figure 2 As shown, the oil cylinder is controlled by a two-position four-way solenoid valve. The pressure oil source is divided into two routes, one is the working oil route before the valve, connected to the P port of the solenoid valve; the other is the lubrication oil route, connected to the oil pipe in the cylinder.

[0034] like Figure 2 As shown, the cylinder body and the piston are closed to form two working oil chambers. Since the cylinder is installed in the equipment box, the fork is clamped between the two pistons, and the structure is more compact than the external fork. The post-valve working oil circuit I and post-valve working oil circuit II are connected to the two working chambers of the cylinder respectively, controlling the piston to move the fork left and right, pushing the clutch locking gear ring.

[0035] like Figure 2 As shown, an internal cylinder connecting oil pipe is arranged inside the oil cylinder, one end of which is connected to one end of the cylinder body and communicated with the lubricating oil circuit, the other end of the internal cylinder connecting oil pipe is communicated with the piston internal oil circuit in the piston, and the piston internal oil circuit is communicated with the main oil circuit in the shift fork.

[0036] Specific implementation method 2: An oil cylinder for controlling the engagement and locking of a synchronous automatic clutch, wherein the gap between the piston 130 at the left end and the oil chamber I and the gap between the piston 130 at the right end and the oil chamber II are both sealed.

[0037] In this embodiment, the piston and the cylinder body rely on gap sealing, which has less friction than using a molded seal, and the cylinder can be controlled using system low-pressure lubricating oil.

[0038] Other implementations are the same as the first implementation

[0039] Specific implementation method three: A cylinder for controlling the engagement and locking of a synchronous automatic clutch, wherein the inner connecting oil pipe 140 is fixed to the cylinder body 110 , and the inner connecting oil pipe 140 is connected to the left end piston 130 in a clearance sliding manner.

[0040] In this embodiment, the oil pipe in the cylinder is fixed to the cylinder body, and the oil pipe in the cylinder is connected to the piston in a clearance sliding manner. When the piston moves axially, it does not affect the lubricating oil entering the main oil path in the shift fork.

[0041] Other implementations are the same as the first specific implementation.

[0042] Specific embodiment four: A cylinder for controlling the engagement and locking of a synchronous automatic clutch, wherein a shift fork internal oil distribution circuit 122 is also provided on the shift fork 120, wherein the inlet end of the shift fork internal oil distribution circuit 122 is connected to the shift fork internal total oil circuit 121, and the outlet end of the shift fork internal oil distribution circuit 122 faces the clutch locking gear ring 200, and the shift fork internal oil distribution circuit 122 is used to apply the lubricating oil of the shift fork internal total oil circuit 121 to the clutch locking gear ring 200.

[0043] In this embodiment: two shift fork internal distribution oil circuits are arranged on both sides of the shift fork and are connected to the main oil circuit in the shift fork; shift fork internal distribution oil circuits are formed on the friction surfaces between the shift fork and the clutch locking gear ring; the shift fork internal distribution oil circuits on each friction surface provide sufficient lubrication for the friction surfaces between the shift fork and the clutch locking gear ring, ensuring that when the working linear speed of the clutch locking gear ring is high, the friction surface will not be severely worn and the oil cylinder can still work reliably.

[0044] Other implementations are the same as the first specific implementation.

[0045] Specific implementation method 5: A hydraulic cylinder for controlling the engagement and locking of a synchronous automatic clutch, wherein an anti-rotation pin 150 is provided in a movable cavity of a shift fork, and a shift fork 120 is slidably connected to the anti-rotation pin 150.

[0046] In this embodiment: when the oil cylinder rotates the locking toothed ring, in addition to the axial resistance, the friction surface between the shift fork and the locking toothed ring will also be subject to the friction force in the tangential direction of the locking toothed ring, which will cause the shift fork to rotate around the axis of the piston. In order to limit the rotation of the shift fork, the solution adopted by the utility model is as follows: Figure 3 As shown, an anti-rotation pin is installed on the cylinder body, the anti-rotation pin is fixed to the cylinder body, the anti-rotation pin passes through the shift fork, and the shift fork moves along the piston axis and the anti-rotation pin axis at the same time, and will not rotate when subjected to the tangential friction force of the locking gear ring.

[0047] Other implementations are the same as the first specific implementation.

[0048] Specific embodiment six: A cylinder for controlling the engagement and locking of a synchronous automatic clutch, wherein a proximity switch I 310 and a proximity switch II 320 are installed on the upper end of the cylinder body 110, and a trigger block 330 is installed on the fork 120. When the fork 120 moves to the unlocking position, the proximity switch I 310 sends a signal, and when the fork 120 moves to the locking position, the proximity switch II 320 sends a signal. The proximity switch I 310 and the proximity switch II 320 are used to respond to the working position of the fork 120.

[0049] In this embodiment: proximity switch I and proximity switch II are installed on the upper end of the oil cylinder body, and a trigger block is installed on the piston. When the piston moves to the unlocking position, proximity switch I sends a signal, and when the piston moves to the locking position, proximity switch II sends a signal. The working position of the oil cylinder can be displayed.

[0050] Other implementations are the same as the first specific implementation.

[0051] Working principle:

[0052] The fork is integrated with the hydraulic cylinder. The fork is used as the actuator of the cylinder. The two working chambers of the cylinder are set on both sides of the actuator, and the fork is clamped between the two pistons. The cylinder is installed on the bracket of the inner wall of the equipment box. Leakage is allowed between the piston and the cylinder body, so the gap between the piston and the cylinder is sealed, and there is no need to use molded seals. The friction between the piston and the cylinder body is small, and low-pressure system lubricating oil can be used as the cylinder control oil.

[0053] In addition to the two oil circuits connecting the working chamber of the cylinder, the cylinder is also equipped with a lubricating oil circuit, which introduces the lubricating oil into the shift fork through a piston on one side, and then distributes the oil through the internal oil circuit of the shift fork and the shift fork lubricating oil nozzle, and sprays it onto the contact friction surface between the shift fork and the high-speed rotating part, providing sufficient lubrication for the friction surface, ensuring that when the cylinder pushes the clutch locking gear ring, the friction surface will not wear and can work normally.

[0054] When the oil cylinder pushes the high-speed rotating locking ring, in addition to the axial resistance of the high-speed rotating parts, the friction surface will also be subject to the friction force in the tangential direction of the high-speed rotating parts. This force will cause the shift fork to rotate around the piston axis. In order to limit the rotation of the shift fork, an anti-rotation pin is installed on the cylinder body. The anti-rotation pin passes through the shift fork. The shift fork moves along the piston axis and the anti-rotation pin axis at the same time. When it is subjected to the tangential friction force of the rotating parts, it will not rotate.

Claims

1. A cylinder for controlling the engagement and locking of a synchronous automatic clutch, wherein the cylinder (100) is mounted on a cylinder support (2) in a device housing (1) and arranged on the side of a rotating clutch locking gear ring (200), the cylinder (100) is controlled to operate by a pressure oil source, and the cylinder (100) is used to drive the clutch locking gear ring (200) to move and change its axial position; characterized in that: The oil cylinder (100) comprises an oil cylinder body (110), a shift fork (120), an in-cylinder connecting pipe (140) and two pistons (130); A cavity is provided in the cylinder body (110), and the piston (130) is slidably connected to the cavity. The gap between each side of the piston (130) and the cavity forms an oil cavity. Each oil cavity is connected to an oil port provided in the cylinder body (110). An inner piston oil passage (131) is provided at one end of the piston (130). One end of the cylinder body (110) penetrates into an inner cylinder connecting pipe (140), and the other end of the inner cylinder connecting pipe (140) is connected to the inner piston oil passage (131). The oil cylinder body (110) is provided with an oil chamber I, a shift fork movable chamber and an oil chamber II in sequence from left to right. The oil chamber I is communicated with an oil port I provided at the left end of the oil cylinder body (110), and the oil chamber II is communicated with an oil port II provided at the right end of the oil cylinder body (110). The shift fork (120) is sandwiched between two pistons (130). The piston (130) at the left end is slidably connected to the oil chamber I. The shift fork (120) is slidably connected to the shift fork movable chamber. A window is provided on the side wall of the shift fork movable chamber for allowing a plug of the shift fork (120) to extend. The plug of the fork (120) is used to shift the clutch locking gear ring (200), the piston (130) at the right end is slidably connected with the oil chamber II, the left end of the oil cylinder body (110) penetrates into the cylinder connecting pipe (140), the piston (130) at the left end is provided with a piston internal oil circuit (131), the middle part of the shift fork (120) is provided with a shift fork internal total oil circuit (121), the cylinder connecting pipe (140) is inserted into the piston internal oil circuit (131), and the piston internal oil circuit (131) is communicated with the shift fork internal total oil circuit (121); The oil cylinder (100) is connected to an oil circuit control assembly, the oil circuit control assembly comprising a pressure oil source (300), an oil source circuit, a lubricating oil circuit (340), a pre-valve working oil circuit (350), a post-valve working oil circuit I (360), a post-valve working oil circuit II (370) and a two-position four-way valve; The pressure oil source is connected to the pressure oil source (300) through the lubricating oil circuit (340) and the pressure oil source is connected to the cylinder connecting pipe (140) through the lubricating oil circuit (340). The pressure oil source is connected to the p end of the two-position four-way valve through the front-valve working oil circuit (350). The oil port I is connected to the A end of the two-position four-way valve through the rear-valve working oil circuit I (360). The oil port II is connected to the B end of the two-position four-way valve through the rear-valve working oil circuit II (370). The oil source circuit is connected to the T end of the two-position four-way valve. When working, the lubricating oil of the pressure oil source (300) flows from the pressure oil source through the lubricating oil path (340) and the connecting pipe (140) in the cylinder to the main oil path (121) in the shift fork, and the lubricating oil is applied to the clutch locking gear ring (200). When the P end and the A end of the two-position four-way valve are connected, the B end and the T end of the two-position four-way valve are connected, and the lubricating oil of the pressure oil source (300) enters the oil chamber I through the pressure oil source through the pre-valve working oil path (350), the post-valve working oil path I (360) and the oil port I to push the two pistons (130) to move rightward, and the lubricating oil of the oil chamber II flows to the oil source circuit through the oil port II and the post-valve working oil path II (370); When the P end and the B end of the two-position four-way valve are connected, the A end and the T end of the two-position four-way valve are connected, and the lubricating oil of the pressure oil source (300) enters the oil chamber II through the pressure oil source through the pre-valve working oil path (350), the post-valve working oil path II (370) and the oil port II to push the two pistons (130) to move leftward, and the lubricating oil of the oil chamber I flows to the oil source circuit through the oil port I and the post-valve working oil path I (360).

2. The oil cylinder for controlling the engagement and locking of a synchronous automatic clutch according to claim 1, characterized in that: The piston (130) at the left end and the oil chamber I as well as the piston (130) at the right end and the oil chamber II are both sealed by gaps.

3. The oil cylinder for controlling the engagement and locking of a synchronous automatic clutch according to claim 1, characterized in that: The cylinder connecting pipe (140) is fixed to the oil cylinder body (110), and the cylinder connecting pipe (140) is connected to the piston (130) at the left end in a clearance sliding manner.

4. The oil cylinder for controlling the engagement and locking of a synchronous automatic clutch according to claim 1, characterized in that: The shift fork (120) is also provided with an internal shift fork oil distribution passage (122), the inlet end of the internal shift fork oil distribution passage (122) is connected to the internal shift fork total oil passage (121), the outlet end of the internal shift fork oil distribution passage (122) faces the clutch locking gear ring (200), and the internal shift fork oil distribution passage (122) is used to apply lubricating oil in the internal shift fork total oil passage (121) to the clutch locking gear ring (200).

5. The oil cylinder for controlling the engagement and locking of a synchronous automatic clutch according to claim 1, characterized in that: An anti-rotation pin (150) is arranged in the movable cavity of the shift fork, and the shift fork (120) is slidably connected to the anti-rotation pin (150).

6. The oil cylinder for controlling the engagement and locking of a synchronous automatic clutch according to claim 1, characterized in that: A proximity switch I (310) and a proximity switch II (320) are installed on the upper end of the oil cylinder body (110), and a trigger block (330) is installed on the shift fork (120). When the shift fork (120) moves to the unlocking position, the proximity switch I (310) sends a signal, and when the shift fork (120) moves to the locking position, the proximity switch II (320) sends a signal. The proximity switch I (310) and the proximity switch II (320) are used to respond to the working position of the shift fork (120).

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