阅读说明：本技术 一种平衡缓冲式三通温控阀 (Balanced buffering formula tee bend temperature control valve ) 是由 洪源 裘春华 王磊 王冬冬 方圣琦 秦康垚 杨钟伟 于 2019-10-29 设计创作，主要内容包括：一种平衡缓冲式三通温控阀,安装于柴油机缸套冷却水管路系统上,包括阀体、阀杆、阀瓣和缓冲器,其中,阀体的内部空间隔为第一腔室、第二腔室和第三腔室,缓冲器包括缓冲活塞和壳体,壳体紧固于阀体的下部,缓冲活塞设置于该壳体的内部且将壳体的内部空间隔断为上部空间和下部空间,该下部空间通过管路与第二腔室连通,使下部空间内冷却水的压力与第二腔室内冷却水的压力相同,阀杆的下端伸入壳体内且与缓冲活塞固定连接,冷却水在缓冲活塞的上下形成的压力差与冷却水在阀瓣的上下形成的压力差进行抵消,从而使阀杆的受力达到平衡且阀瓣的位置达到稳定,以完成缸套冷却水管路系统的温度调节功能。本发明平衡了阀瓣上、下面的压差,稳定了阀瓣的位置,实现了温度调节功能,提高了柴油机运行的安全性。(A balanced buffer type three-way temperature control valve is arranged on a cooling water pipeline system of a cylinder sleeve of a diesel engine and comprises a valve body, a valve rod, a valve clack and a buffer, wherein the inner space of the valve body is divided into a first chamber, a second chamber and a third chamber, the buffer comprises a buffer piston and a shell, the shell is fastened at the lower part of the valve body, the buffer piston is arranged in the shell and divides the inner space of the shell into an upper space and a lower space, the lower space is communicated with the second chamber through a pipeline, so that the pressure of cooling water in the lower space is the same as that of the cooling water in the second chamber, the lower end of the valve rod extends into the shell and is fixedly connected with the buffer piston, the pressure difference formed by the cooling water above and below the buffer piston is offset with the pressure difference formed by the cooling water above and below the valve clack, thereby the stress of the valve rod is, so as to complete the temperature regulation function of the cylinder sleeve cooling water pipeline system. The invention balances the pressure difference between the upper surface and the lower surface of the valve clack, stabilizes the position of the valve clack, realizes the temperature regulation function and improves the safety of the diesel engine in operation.)

1. The utility model provides a balanced buffering formula tee bend temperature-sensing valve installs on diesel engine cylinder liner cooling water pipe system, and this cylinder liner cooling water pipe system includes cylinder head low temperature water system, cylinder jacket high temperature water system and cooling water booster pump, tee bend temperature-sensing valve includes valve body, valve rod and valve clack, the inner space of valve body separates to be three cavity, and wherein, the flange mouth of first cavity is the water inlet, connects cylinder jacket high temperature water system, and the flange mouth of second cavity is the water inlet, connects the cooling water booster pump, the flange mouth of third cavity are the delivery port, connect cylinder head low temperature water system, the valve clack fastening just moves its characterized in that from top to bottom along with this valve rod on the valve rod together: the three-way temperature control valve also comprises a buffer, the buffer comprises a buffer piston and a shell, the shell is fastened at the lower part of the valve body, the buffer piston is arranged in the shell and divides the inner space of the shell into an upper space and a lower space, the lower space is communicated with the second chamber through a pipeline, so that the pressure of cooling water in the lower space is the same as that of the cooling water in the second chamber, the lower end of the valve rod extends into the shell and is fixedly connected with the buffer piston, the buffer piston can move up and down in the shell under the push of the valve rod, the pressure difference formed by the cooling water above and below the buffer piston is offset with the pressure difference formed by the cooling water above and below the valve clack, therefore, the stress of the valve rod is balanced, the position of the valve clack is stable, and the temperature adjusting function of the cylinder sleeve cooling water pipeline system is completed.

2. The balanced buffer type three-way temperature control valve according to claim 1, characterized in that: the upper end of the valve rod extends out of the upper part of the valve body and is connected with a valve driver.

3. The balanced buffer type three-way temperature control valve according to claim 1, characterized in that: the valve clack is fastened on the valve rod through a bushing.

Technical Field

The invention relates to a component of a marine diesel engine, in particular to a balance buffer type three-way temperature control valve, and belongs to the technical field of diesel engines.

Background

With the development of marine diesel engine technology and the improvement of the requirement of the EEDI energy efficiency index of the ship, the diesel engine is forced to continuously improve the performance intensity so as to improve the combustion economy. Because the pressure of the cylinder is continuously increased, the dew point of the gas in the cylinder sleeve of the diesel engine is correspondingly and continuously increased, and the dew point is increased from the original 180 ℃ to about 190 ℃ at present; however, most ships adopt a long-term low-load operation condition, so that the temperature of the cylinder sleeve wall is lower and is below the gas dew point, and thus, water vapor can be continuously condensed out to react with sulfides in waste gas to form sulfuric acid substances, and low-temperature cold corrosion is caused to the cylinder sleeve.

One of the mainstream methods for solving the problem of cold corrosion of the cylinder sleeve at present is to increase the temperature of the cylinder sleeve wall to be above the dew point.

The principle of improving the wall temperature of the cylinder sleeve is shown in figure 1, a three-way temperature control valve 4 is required to be used, the three-way temperature control valve 4 is installed on a cooling water pipeline system of the cylinder sleeve of the diesel engine, a first end of the three-way temperature control valve is connected with a cylinder cover low-temperature water system 2 (the water temperature is lower), a second end of the three-way temperature control valve is connected with a cylinder sleeve high-temperature water system 1 (the water temperature is higher), and a.

When the diesel engine runs at low load, the temperature of the cylinder sleeve high-temperature water system 1 is lower, and water vapor is easier to condense, so that the cooling water of the lower cylinder sleeve circulates in the cylinder sleeve high-temperature water system 1 by the operation of the circulating pump 6 and the closing of the three-way temperature control valve 4 or the reduction of the opening degree of the three-way temperature control valve 4, and the temperature is continuously increased.

When the diesel engine runs under high load, because the combustion chamber is higher in temperature per se, the cylinder sleeve does not need to be heated additionally, the three-way temperature control valve 4 is opened greatly at the moment, the high-temperature water continuously flows out of the cylinder sleeve high-temperature water system 1 and is mixed into the cylinder cover low-temperature water system 2, the water temperature entering the diesel engine is reduced through the external temperature control valve 5 at the moment, and therefore the fact that the cooling water of the cylinder sleeve high-temperature water system 1 and the cylinder cover low-temperature water system 2 still flows out of the diesel engine at.

The water flow pattern of the existing three-way temperature control valve 4 and the structure diagram of the interior of the valve body are shown in fig. 2 and fig. 3, and the valve clack 4A is fixed on the valve rod 4B and connected with the valve body 4C. The first chamber A on the valve body 4C is connected with the cylinder sleeve high-temperature water system 1, the second chamber B is connected with the cooling water booster pump 3, and the cooling water introduced from the first chamber A and the second chamber B flows into the cylinder cover low-temperature water system 2 after being mixed in the third chamber AB of the valve body 4C.

The water flow of the second chamber B acting on the valve flap 4A comes from the cooling water booster pump 3, the cooling water pressure of the water flow is P1, the water flow of the first chamber A acting on the valve flap 4A comes from the cylinder liner high-temperature water system 1, the cooling water pressure of the water flow is P2, and in an ideal case, the 2 cooling water pressures P1 and P2 should be the same, so that the valve flap 4A is kept balanced, and the temperature regulation function can be normally completed.

However, in the test run process of the diesel engine, the actual situation is that the cooling water pressure P1 in the second chamber B is not completely the same as the cooling water pressure P2 in the first chamber a, which causes the difference in pressure between the upper and lower surfaces of the valve flap 4A, so that the valve rod 4B moves upwards or downwards to block the water inlet of the first chamber a or the second chamber B, and the three-way temperature control valve 4 cannot normally complete temperature adjustment, thereby causing the alarm of the diesel engine and affecting the safety of the running of the ship.

Disclosure of Invention

The invention aims to solve the problems that the defects of the existing three-way temperature control valve are overcome, the problem of ship navigation safety caused by application of the three-way temperature control valve to a diesel engine is solved, and the balance buffer type three-way temperature control valve is provided.

Based on the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a balanced buffering formula tee bend temperature-sensing valve installs on diesel engine cylinder liner cooling water pipe system, and this cylinder liner cooling water pipe system includes cylinder head low temperature water system, cylinder jacket high temperature water system and cooling water booster pump, tee bend temperature-sensing valve includes valve body, valve rod and valve clack, the inner space of valve body separates to be three cavity, and wherein, the flange mouth of first cavity is the water inlet, connects cylinder jacket high temperature water system, and the flange mouth of second cavity is the water inlet, connects the cooling water booster pump, the flange mouth of third cavity are the delivery port, connect cylinder head low temperature water system, the valve clack fastening just moves its characterized in that from top to bottom along with this valve rod on the valve rod together: the three-way temperature control valve also comprises a buffer, the buffer comprises a buffer piston and a shell, the shell is fastened at the lower part of the valve body, the buffer piston is arranged in the shell and divides the inner space of the shell into an upper space and a lower space, the lower space is communicated with the second chamber through a pipeline, so that the pressure of cooling water in the lower space is the same as that of the cooling water in the second chamber, the lower end of the valve rod extends into the shell and is fixedly connected with the buffer piston, the buffer piston can move up and down in the shell under the push of the valve rod, the pressure difference formed by the cooling water above and below the buffer piston is offset with the pressure difference formed by the cooling water above and below the valve clack, therefore, the stress of the valve rod is balanced, the position of the valve clack is stable, and the temperature adjusting function of the cylinder sleeve cooling water pipeline system is completed.

Further, the upper end of the valve rod extends out of the upper part of the valve body and is connected with a valve driver.

Further, the valve flap is fastened to the valve stem by a bushing.

Compared with the prior art, the invention has the beneficial effects that:

the buffer with the lower space communicated with the second chamber is additionally arranged, so that the pressure change in the three-way temperature control valve can be balanced and buffered, the position of the valve clack is balanced and stabilized, the problem that the cooling water flow cannot be adjusted due to the pressure change at different inlets of the three-way temperature control valve is effectively solved, the temperature adjusting function of a cylinder sleeve cooling water pipeline system is realized, and the safety and the reliability of the operation of a diesel engine are improved.

Drawings

FIG. 1 is a schematic diagram of a cooling water piping system for a cylinder liner of a diesel engine.

Fig. 2 is a water flow direction diagram of a conventional three-way temperature control valve.

Fig. 3 is a schematic view of the internal structure of a conventional three-way thermostatic valve.

Fig. 4 is a schematic structural diagram of the present invention.

In the figure, 1-cylinder jacket high temperature water system, 2-cylinder head low temperature water system, 3-cooling water booster pump, 4-three way temperature control valve, 4A-valve clack, 4B-valve rod, 4C-valve body, 4D-casing, 4E-valve driver, 4F-buffer piston, 4G-bolt, 4H-pipeline, 4K-bush, 5-temperature control valve, 6-circulating pump, a-first chamber, B-second chamber, AB-third chamber, P1-cooling water pressure in the second chamber, P2-cooling water pressure in the first chamber.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific examples, but the scope of the present invention is not limited to the examples described below. All equivalent changes and modifications made according to the contents of the present specification belong to the technical scope of the present patent application.

Referring to fig. 1, the balanced buffer type three-way temperature control valve 4 of the present invention is installed on a cylinder liner cooling water pipeline system of a diesel engine, and the cylinder liner cooling water pipeline system includes a cylinder head low-temperature water system 2, a cylinder liner high-temperature water system 1, and a cooling water booster pump 3.

Referring to fig. 4, the balanced buffer type three-way temperature control valve 4 includes a valve body 4C, a valve rod 4B, a valve flap 4A, and a buffer.

The valve body 4C is provided with 3 flange openings in different directions: 2 water inlets and 1 water outlet. The internal space of this valve body 4C is isolated by the internal structure into three chambers: the cylinder cover low-temperature water system comprises a first cavity A, a second cavity B and a third cavity AB, wherein a flange port of the first cavity A is a water inlet and is connected with the cylinder sleeve high-temperature water system 1, a flange port of the second cavity B is a water inlet and is connected with a cooling water booster pump 3, a flange port of the third cavity AB is a water outlet and is connected with the cylinder cover low-temperature water system 2.

The valve flap 4A is provided with a water outlet passage, is fastened to the valve rod 4B through a bush 4K, and moves up and down together with the valve rod 4B.

The damper includes a damping piston 4F and a housing 4D. The housing 4D is fastened to a lower portion of the valve body 4C by a bolt, the buffer piston 4F is provided inside the housing 4D and partitions an internal space of the housing 4D into an upper space and a lower space, the lower space is communicated with the second chamber B through a pipe 4H, and the pipe 4H introduces the cooling water in the second chamber B into the lower space of the buffer piston 4F so that a pressure of the cooling water in the lower space is the same as a pressure of the cooling water in the second chamber B.

The upper end of the valve rod 4B extends out of the upper part of the valve body 4C and is connected with a valve driver 4E; the lower end of the valve rod 4B extends into the housing 4D of the damper and is fixedly connected to the damping piston 4F by a bolt 4G.

The buffer piston 4F is pushed by the valve rod 4B to move up and down in the shell 4D, and the pressure difference formed by the cooling water above and below the buffer piston 4F is offset with the pressure difference formed by the cooling water above and below the valve clack 4A, so that the stress of the valve rod 4B is balanced, the position of the valve clack 4A is stable, and the temperature adjusting function of the cylinder sleeve cooling water pipeline system is completed.

The operation process of the invention is as follows:

when water enters a first chamber A and a second chamber B in a valve body 4C of the three-way temperature control valve 4, the pressure P1 of cooling water in the second chamber B acting on the valve clack 4A is different from the pressure P2 of cooling water in the first chamber A acting below, P1-P2 is delta Px, and at the moment, the valve rod 4B tends to move downwards under the action of the delta Px; meanwhile, the cooling water pressure P3 (P3 ═ P1) entering the space below the buffer piston 4F in the buffer housing 4D is different from the cooling water pressure P4 acting on the space above the buffer piston 4F, P3-P4 ═ Δ Py, at this time, the valve rod 4B tends to move upward under the action of Δ Py, Δ Px ═ Δ Py, and the Δ Px and the Δ Py cancel each other out, so that the stress of the valve rod 4B is restored to balance again, and after the water flows in the first chamber a and the second chamber B are mixed normally, the water is introduced into the third chamber AB through the water flow hole preset in the valve flap 4A, thereby completing the temperature regulation function.

The scope of the invention is not limited to the above embodiments, and any modifications, equivalent substitutions, obvious variations and improvements made by those skilled in the art without departing from the principle and spirit of the invention should fall within the scope of the invention.