A liquid-driven circulating liquid-sealed compressor with a connecting body for liquid inlet and outlet

Abstract

The present invention relates to a liquid-driven circulating liquid-sealed compressor with a connecting body for liquid inlet and outlet, the liquid-driven circulating liquid-sealed compressor with liquid inlet and outlet of the connecting body comprises a cylinder body, a cylinder body, a gas piston, an oil piston, a piston rod and other structures, a first circulating liquid cavity is formed between the gas piston and the cylinder body, a second circulating liquid cavity and a third circulating liquid cavity are provided between the piston rod and the connecting body, a liquid inlet channel and a liquid outlet channel are provided in the piston rod and the gas piston, the liquid inlet channel is connected between the first circulating liquid cavity and the second circulating liquid cavity, the liquid outlet channel is connected between the first circulating liquid cavity and the third circulating liquid cavity, a circulating liquid inlet connected to the second circulating liquid cavity and a circulating liquid outlet connected to the third circulating liquid cavity are provided on the connecting body, and the axial lengths of the second circulating liquid cavity and the third circulating liquid cavity are not less than the working distance when the piston is compressed. The compressor has the advantages of good cooling effect, high and stable compression efficiency, simple structure and the like.

Description

Technical Field

[0001] The invention relates to the field of compressors, and in particular to a liquid-driven circulating liquid-sealed compressor with a connecting body for liquid inlet and outlet. Background Art

[0002] At present, circulating liquid-sealed compressors mainly use a crankshaft structure to drive the reciprocating motion of a piston in a cylinder body to pressurize the gas; a liquid-sealed cavity is set between the piston and the cylinder body to store circulating liquid to achieve the purposes of sealing, lubrication, cooling, etc., such as the compressor disclosed in patent CN114439728A.

[0003] In the above compressor, the circulating liquid in the liquid seal cavity mainly plays a role of sealing and lubrication, and also plays a cooling role. For the compressor, it mainly uses the reciprocating motion of the piston to perform work, so a lot of heat will be generated due to friction between the piston and the cylinder body, and between the piston rod and the cylinder head. The piston and the piston rod are easily deformed after being heated, and then they may move poorly or get stuck. However, the cooling effect of the circulating liquid in the liquid seal cavity is limited, which is difficult to meet the use requirements of the compressor.

[0004] In addition, the existing compressor uses a crankshaft structure to drive the piston, and its piston is prone to shaking, resulting in poor stability in use, which is prone to problems such as piston deformation, piston wear, and poor sealing between the piston and the cylinder body, affecting its service life. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, the present invention provides a liquid-driven circulating liquid-sealed compressor with a connector for liquid inlet and outlet, which has the advantages of good cooling effect, high and stable compression efficiency, simple structure, etc.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] A liquid-driven circulating liquid-sealed compressor with a connecting body for liquid inlet and outlet, comprising an oil cylinder body, at least one end of the oil cylinder body is connected to a cylinder body through a connecting body, an oil piston and a gas piston are respectively arranged in the oil cylinder body and the cylinder body, and a cover is connected to the other end of the cylinder body to form a first air pressure chamber and a second air pressure chamber on both sides of the gas piston, at least one of which is a working chamber for compressed gas, a piston rod arranged through the connecting body is connected between the gas piston and the oil piston, a first hydraulic chamber and a second hydraulic chamber are respectively formed on both sides of the oil piston, and a hydraulic oil port is arranged on the oil cylinder body to communicate with the first hydraulic chamber and the second hydraulic chamber respectively;

[0008] A first circulating liquid chamber is formed between the gas piston and the cylinder body, a second circulating liquid chamber and a third circulating liquid chamber are provided between the piston rod and the connecting body, a liquid inlet channel and a liquid outlet channel are provided in the piston rod and the gas piston, the liquid inlet channel is connected between the first circulating liquid chamber and the second circulating liquid chamber, the liquid outlet channel is connected between the first circulating liquid chamber and the third circulating liquid chamber, a circulating liquid inlet connected to the second circulating liquid chamber and a circulating liquid outlet connected to the third circulating liquid chamber are provided on the connecting body, and the axial lengths of the second circulating liquid chamber and the third circulating liquid chamber are not less than the working distance when the piston is compressed.

[0009] Furthermore, a first annular recess is provided on the outer periphery of the gas piston to form the first circulating liquid chamber with the cylinder body, and a second annular recess is provided in the connecting body to form the second circulating liquid chamber and the third circulating liquid chamber with the piston rod.

[0010] Furthermore, a first sealing guide assembly is provided between the gas piston and the cylinder body on both sides of the first circulating liquid chamber, and a second sealing guide assembly is provided between the piston rod and the connecting body on both sides of the second circulating liquid chamber and the third circulating liquid chamber.

[0011] Furthermore, a cylinder liner is provided in the cylinder body, the gas piston is provided in the cylinder liner, a spiral cooling cavity is formed between the cylinder liner and the cylinder body, and a coolant inlet and a coolant outlet connected to the spiral cooling cavity are provided on the cylinder body.

[0012] Furthermore, the cylinder bodies corresponding to the first air pressure chamber and the second air pressure chamber are respectively provided with an air inlet and an air outlet connected thereto, and the air inlet corresponding to the working chamber is provided with an air inlet valve, and the air outlet is provided with an air outlet valve.

[0013] The present invention adopts the above technical solution, and has the advantages of:

[0014] 1. The compressor meets the sealing and lubrication requirements between the gas piston and the cylinder body through the first circulating liquid chamber; the sealing and lubrication requirements between the piston rod and the connector are met through the second and third circulating liquid chambers; the circulating liquid route is reasonably arranged through the cooperation of the distribution sleeve and the piston rod, so that the gas piston, piston rod, cylinder body, connector and other structures are effectively cooled by the circulating liquid flowing through them, which not only ensures the smooth pressurization and compression of the compressor, but also helps to extend the service life of the compressor. In addition, each structure is connected with rigid parts, and has a long service life.

[0015] 2. This compressor pressurizes the gas by cooperating with the oil cylinder body and the air cylinder body. On the one hand, the pressurization process is relatively stable and is not easy to damage the piston and other structures; on the other hand, it can fully utilize the energy of the reciprocating movement of the oil cylinder body, and the compression efficiency is relatively high.

[0016] 3. The compressor is designed with respect to the piston, piston rod and connector so that, on the basis of meeting the requirements of sealing, lubrication and effective cooling, the number of pipelines connected to the cylinder body can be minimized, so that the overall structure looks simpler and neater when it is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional structural schematic diagram of one embodiment of the present invention;

[0018] Figure 2 It is a schematic cross-sectional structural diagram of another embodiment of the present invention.

[0019] In the figure, 1, oil cylinder body, 2, connecting body, 3, cylinder body, 4, oil piston, 5, gas piston, 6, cover, 7, first air pressure chamber, 8, second air pressure chamber, 9, piston rod, 10, first hydraulic chamber, 11, second hydraulic chamber, 12, first circulating liquid chamber, 14, second circulating liquid chamber, 13, third circulating liquid chamber, 15, liquid inlet channel, 16, liquid outlet channel, 17, cylinder liner, 18, spiral cooling chamber, 19, intake valve, 20, outlet valve. DETAILED DESCRIPTION

[0020] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0021] like Figure 1-2 As shown, in this embodiment, the liquid-driven circulating liquid-sealed compressor with the connecting body inlet and outlet liquid includes an oil cylinder body 1, at least one end of the oil cylinder body 1 is connected to one end of the cylinder body 3 through a connecting body 2, and an oil piston 4 and a gas piston 5 are respectively provided in the oil cylinder body 1 and the cylinder body 3, and the other end of the cylinder body 3 is connected to a cover 6 to form a first air pressure chamber 7 and a second air pressure chamber 8 on both sides of the gas piston 5, respectively, and at least one of the two is a working chamber for compressed gas, such as Figure 2 For a working chamber, such as Figure 1There are two working chambers, a piston rod 9 that runs through the connecting body 2 is connected between the gas piston 5 and the oil piston 4, a first hydraulic chamber 10 and a second hydraulic chamber 11 are formed on both sides of the oil piston 4, and a hydraulic oil port that is respectively connected to the first hydraulic chamber and the second hydraulic chamber is provided on the oil cylinder body 1; a first circulating liquid chamber 12 is formed between the gas piston 5 and the cylinder body 3, and a second circulating liquid chamber 14 and a third circulating liquid chamber 13 are provided between the piston rod 9 and the connecting body 2, and a liquid inlet channel 15 and a liquid outlet channel 16 are provided in the piston rod 9 and the gas piston 5, the liquid inlet channel 15 is connected between the first circulating liquid chamber 12 and the second circulating liquid chamber 14, and the liquid outlet channel 16 is connected between the first circulating liquid chamber 12 and the third circulating liquid chamber 13, and a circulating liquid inlet that is connected to the second circulating liquid chamber 14 and a circulating liquid outlet that is connected to the third circulating liquid chamber 13 are provided on the connecting body 2, and the axial lengths of the second circulating liquid chamber 14 and the third circulating liquid chamber 13 are not less than the working distance when the piston is compressed.

[0022] Furthermore, a first annular recess is provided on the outer periphery of the gas piston 5 to form the first circulating liquid chamber 12 with the cylinder body 3 , and a second annular recess is provided in the connecting body 2 to form the second circulating liquid chamber 14 and the third circulating liquid chamber 13 with the piston rod 9 .

[0023] Furthermore, a first sealing guide assembly is provided between the air piston 5 and the cylinder body 3 on both sides of the first circulating liquid chamber 12, and a second sealing guide assembly is provided between the piston rod 9 and the connecting body 2 on both sides of the second circulating liquid chamber 14 and the third circulating liquid chamber 13, respectively. The first sealing guide assembly and the second sealing guide assembly can specifically adopt the following structure: consisting of a guide ring and a sealing ring on its side.

[0024] Furthermore, a cylinder sleeve 17 is further provided in the cylinder body 3, the gas piston 5 is provided in the cylinder sleeve 17, a spiral cooling cavity 18 is further formed between the cylinder sleeve 17 and the cylinder body 3, and a coolant inlet and a coolant outlet connected to the spiral cooling cavity 18 are provided on the cylinder body 3. Such a configuration can not only increase the wear resistance through the cylinder sleeve, but also facilitate the configuration of the spiral cooling cavity, so as to increase the cooling effect by introducing a cooling medium such as cold water into the spiral cooling cavity.

[0025] Furthermore, the cylinder body 3 corresponding to the first air pressure chamber 7 and the second air pressure chamber 8 is respectively provided with an air inlet and an air outlet connected thereto, and the air inlet corresponding to the working chamber is provided with an air inlet valve 19, and the air outlet is provided with an air outlet valve 20.

[0026] During operation, hydraulic oil is alternately injected into the first hydraulic chamber and the second hydraulic chamber to alternately drive the gas pistons in the two cylinder bodies to reciprocate, thereby completing the gas compression process efficiently and stably. In the above compression process, the continuous introduction of circulating liquid into the first circulating liquid chamber can achieve the sealing and lubrication between the gas piston and the cylinder body, and the continuous introduction of circulating liquid into the second circulating liquid chamber and the third circulating liquid chamber can achieve the sealing and lubrication between the piston rod and the connecting body. By setting a liquid inlet channel and a liquid outlet channel in the piston rod that cooperate with the first circulating liquid chamber, the second circulating liquid chamber and the third circulating liquid chamber, the piston rod, gas piston, cylinder body, connecting body and other structures can be better cooled during the compression process, achieving effective cooling of the above structures, which is conducive to the smooth progress of the compression process.

[0027] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any substitution, improvement or change made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0028] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A liquid-driven circulating liquid-sealed compressor with a connecting body for liquid inlet and outlet, characterized in that: It comprises an oil cylinder body, at least one end of the oil cylinder body is connected to one end of the cylinder body through a connecting body, an oil piston and a gas piston are respectively arranged in the oil cylinder body and the cylinder body, and a cover is connected to the other end of the cylinder body to form a first air pressure chamber and a second air pressure chamber on both sides of the gas piston, both of which are working chambers for compressed gas, a piston rod arranged through the connecting body is connected between the gas piston and the oil piston, a first hydraulic chamber and a second hydraulic chamber are respectively formed on both sides of the oil piston, and a hydraulic oil port is provided on the oil cylinder body, which is respectively connected to the first hydraulic chamber and the second hydraulic chamber; A first circulating liquid chamber is formed between the gas piston and the cylinder body, a second circulating liquid chamber and a third circulating liquid chamber are provided between the piston rod and the connecting body, a liquid inlet channel and a liquid outlet channel are provided in the piston rod and the gas piston, the liquid inlet channel is connected between the first circulating liquid chamber and the second circulating liquid chamber, the liquid outlet channel is connected between the first circulating liquid chamber and the third circulating liquid chamber, a circulating liquid inlet communicating with the second circulating liquid chamber and a circulating liquid outlet communicating with the third circulating liquid chamber are provided on the connecting body, and the axial lengths of the second circulating liquid chamber and the third circulating liquid chamber are not less than the working distance when the piston is compressed; The outer periphery of the gas piston is provided with a first annular recessed portion to form the first circulating liquid chamber with the cylinder body, and the connecting body is provided with a second annular recessed portion to form the second circulating liquid chamber and the third circulating liquid chamber with the piston rod; A first sealing guide assembly is provided between the gas piston and the cylinder body at both sides of the first circulating liquid cavity, and a second sealing guide assembly is provided between the piston rod and the connecting body at both sides of the second circulating liquid cavity and the third circulating liquid cavity.

2. The liquid-driven circulating liquid-sealed compressor with liquid inlet and outlet of the connector according to claim 1, characterized in that: A cylinder sleeve is arranged in the cylinder body, and the gas piston is arranged in the cylinder sleeve. A spiral cooling cavity is formed between the cylinder sleeve and the cylinder body. A coolant inlet and a coolant outlet which are in communication with the spiral cooling cavity are arranged on the cylinder body.

3. The liquid-driven circulating liquid-sealed compressor with liquid inlet and outlet of the connector according to claim 1, characterized in that: The cylinder bodies corresponding to the first air pressure chamber and the second air pressure chamber are respectively provided with an air inlet and an air outlet connected thereto, and the air inlet corresponding to the working chamber is provided with an air inlet valve, and the air outlet is provided with an air outlet valve.

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